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V.050906MS Part # MAN-SPRINTINTERNATIONALHO Sprint International Av1
$50.00 USD
Sprint International HO
Patent Pending
M&R PRINTING EQUIPMENT, INC.
1 N. 372 MAIN STREET - GLEN ELLYN, ILLINOIS 60137 U.S.A.
1 (800) 736-6431
www.mrprint.com
WARNING: For your safety the infor-
mation in this manual must be fol-
lowed to minimize the risk of fire or
explosion or to prevent property
damage, personal injury or death.
WARNING!
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS
- Do not try to light any appliance.
- Do not touch any electrical switch; do not
use any phone in your building.
- Clear the room, building or area of all occu-
pants.
- Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
- If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
i
IMPORTANT!
IMPORTANT!
The product described in this publication may employ hazardous voltages or might cre-
ate other conditions that could, through misuse, inattention, or lack of understanding,
result in personal injury, or damage to the product or to other equipment. It is imperative,
therefore, that personnel involved in the installation, maintenance, or use of this product
understand the operation of the product and the contents of this publication.
This document is based on information available at the time of its publication. While
efforts have been made to be accurate, the information contained herein does not pur-
port to cover all details or variations in hardware, software, features or specifications, nor
to provide for every possible contingency in connection with installation, operation and
maintenance. Features may be described herein which are not present in all variations of
this product. M&R Printing Equipment, Inc. assumes no obligation of notice to holders of
this document with respect to changes subsequently made.
M&R Printing Equipment, Inc. makes no representation or warranty, expressed, implied
or statutory with respect to, and assumes no responsibility for the accuracy, complete-
ness, sufficiency or usefulness of the information contained herein. No warranties of mer-
chantability or fitness for purpose shall apply.
A publication of M&R Printing Equipment, Inc. All information contained herein is derived in part from proprietary and
patent data of M&R Printing Equipment, Inc. This publication may not be reproduced, copied, or transmitted in any form
without prior permission from M&R Printing Equipment, Inc. Printed in the U.S.A. All Rights Reserved 2006.
The information listed below will prove helpful when ordering replacement parts,
requesting service or repairs. Please fill in the following information. The Model
No., Serial No., Schematic No. and Machine No. are all located on the
Manufacturers Rating Plate mounted to the equipment. Should you have any
questions regarding this information, please do not hesitate to contact our
Equipment Service Department at 1 (800) 736-6431 during normal business
hours.
Product Name:
Model No.
Serial No.
Schematic No.
Machine No.
Date of Installation:
Installed By:
Introduction
Equipm
nting en
Pri t,
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M&
Inc
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rk
W or
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et
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Te ce
c h n ic al S e r vi
Valued Customer,
Thank you and congratulations on your purchase of the M&R Sprint International HO (Patent Pending)
Textile Cure/Dry System.
The M&R Sprint International HO is an economical and efficient convection process dryer for
cure/drying a wide range of screen printed substrates. The M&R Sprint International HO han-
dles virtually all types of screen printing inks; from water based and plastisol textile inks, to sol-
vent based and enamel inks commonly used in graphic print applications.
A thorough understanding of the operation and maintenance of your new M&R Sprint
International HO will insure maximum production rates and a long service life for your invest-
ment. This Operator's Manual is provided to help guide you, and your employees, in the prop-
er procedures for set-up, operation and preventive maintenance of your new M&R Sprint
International HO.
Should you have any questions regarding the operation or maintenance of your new Sprint
International HO, M&R's world wide Technical Service and Support Network is available to you
during regular business hours (8:30am - 5:00pm C.S.T.) at 1 (800) 736-6431, or, on week ends
or holidays, call our 24 hour Emergency Service Hotline at 1 (630) 462-4715 for technical sup-
port 24 hours a day, seven days a week. International Customers please call +847-967-4461.
On behalf of all of us here at M&R, thank you for selecting M&R as your equipment supplier.
Michael J. Sweers
Director of Technical Services
M&R Printing Equipment, Inc.
Sprint
International HO
Table of
Disclaimer
Contents Model Description
Introduction
Safety Precautions...............................................1
Safety Precautions & Specifications.......................................................5
Specifications
Installation Instructions.........................................7
Set-Up & Principles of Operation.........................................9
Operation Control & Adjustments........................................13
Touch Screen Operator Interface........................19
Using the Infrared Temp Probe...........................33
Maintenance and Preventive Maintenance Procedures..................35
Trouble Shooting Troubleshooting Procedure.................................37
Replacement Parts and
Replacement Parts.............................................39
Warranty Information Warranty Information........................................
Sprint International HO
Safety Precautions
SAFETY PRECAUTIONS This equipment must be used only for the defined purpose
as described in the Operator's Manual, and must be main-
FUNDAMENTAL SAFETY INSTRUCTIONS: tained in perfect running condition in accordance with
Please read all information regarding safety precautions described Safety Regulations.
as presented in the Operator's Manual. Conditions which may compromise operator safety must be
The fundamental requirement to assure safe and trouble- identified and corrected immediately.
free operation of this equipment, is a thorough understand-
ing of the safety information contained in this Operator's Defined Purpose:
Manual. The M&R Sprint International HO Gas Dryer is specifically
This Operator's Manual includes important instructions to designed to cure/dry screen printed inks on textile and flat
assure safe operation of this equipment. This Operator's rigid and semi-rigid substrates. Any other use of the equip-
Manual, and especially the safety instructions as described ment which does not meet the Defined Purpose as
there-in, must be observed by everyone who will operate described above is not permitted. In accordance with the
this equipment. In addition to the safety instructions and Defined Purpose of this equipment, it is necessary to
regulations described in this Operator's Manual, rules and observe all instructions as outlined in the Operator's Manual
regulations of the equipment owners place of business and to perform the preventive maintenance procedures as
must also be observed. described in the manual.
Obligation of the Equipment Operator: Guarantee and Liability:
The equipment Operator is obliged to guarantee that only In principle, our general terms of sale and delivery are valid
staff who are acquainted with the fundamental regulations and these are at the Operator's disposal. Guarantee and lia-
according to workers protection and accident prevention, bility claims for persons or property damage are excluded if
and, are completely knowledgeable in the operation of this they originate for one or more of the following reasons.
equipment have fully read the Safety Chapter and the
Warning Instructions of this manual, and understand the 1. A non-defined use of the equipment
instructions as they relate to operation of this equipment. 2. Improper installation or use of the equipment
Equipment Operators must be continually evaluated to 3. Operation of the equipment with defective safety
assure that they fully understand the operation of this devices
equipment. 4. Non-Observance of instructions as described in the
Operator's Manual for transportation, storage, instal-
Obligation of Personnel: lation, operation, maintenance, set-up and take-
Every person that will be engaged in the operation of this down of the equipment.
equipment must comply with the following before operation 5. Modification of the equipment.
of the equipment is to begin. 6. Failure to replace worn or defective parts of the
1. Observe the fundamental regulations of worker's pro- equipment.
tection and accident prevention. 7. Defective repairs made to the equipment.
2. Read the Safety Chapter and Warning Instructions of 8. Dangerous conditions which are a result of the
this Operator's Manual and confirm by signature that they improper use of the equipment.
understand the instructions as described in the manual.
Description of Safety Symbols and
Dangerous Situations during Operation of the Instructions:
Equipment:
The M&R Sprint International HO has been designed and This symbol signifies or alerts the
constructed in accordance with safety standards as equipment operator of conditions
described by Nationally Recognized Testing Laboratories, or areas of the equipment which
such as the American Gas Association in the United States, present imminent danger to the
and Canadian Standards Association in Canada. However, health of the equipment Operator.
it is possible that dangerous conditions which can cause Non-observance of these
serious injury or loss of life for the user or third persons, or instructions has serious health
damage to the equipment or property could occur.
DANGER! consequences, and can lead to
highly dangerous injuries.
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 1
Sprint International HO
Safety Precautions
This symbol signifies a possible 1. The equipment is shut down.
imminent danger for life and health 2. The electrical power has been dis-connected from the
of persons and equipment equipment.
Operators. 3. In case of delivery of partial components, the Operator
Non-observance of these must install safety devices in accordance with regula-
instructions can have serious tions.
health consequences and can
WARNING! lead to highly dangerous injuries. Exploratory Safety Measures:
The Operator's Manual must be kept on or near the equip-
ment at all times. All safety and danger notices must be kept
This symbol signifies a possible in readable condition at all times.
danger.
Non-observance of these Training of Equipment Operator's
instructions can lead to light Only properly trained Operators may run the equipment.
injuries or damage to the equip- The competence of personnel who are to operate, maintain,
ment or property. set-up and shut down the equipment must be confirmed.
CAUTION! Unskilled staff may work with the equipment only when
supervised by experienced equipment Operators.
This symbol gives important
Equipment Control System:
i
instructions for the proper use of Never make any modifications to hardware or software.
the equipment.Non-observance Only experienced Operators may actuate the control sys-
of these instructions can lead to tem.
equipment failure.
Safety Measures during Normal Operation:
Operate the equipment only if all safety devices are fully
IMPORTANT! operational.
Before starting the equipment, check to be sure no-one will
be en-dangered by the operation of the equipment.
Check the equipment and safety devices at least once per
This symbol is used to describe shift for external or visible damage.
operating tips or especially useful
information. Danger by Electrical Energy:
This information will enable the
Operator to use all equipment Work on the electrical system must
functions for optimal perfor- be carried out by qualified person-
OPERATING mance. nel only.
Check the electrical equipment
TIP! regularly for any sign of defect or
loose connections.
Organizational Measures: Electrical enclosures must be kept
Equipment operators are responsible to provide personal securely locked at all times.
protection when operating this equipment. All safety Only authorized personnel with a
DANGER!
devices must be checked each day before operation of the key are allowed access to electrical
equipment can begin. enclosures.
Safety Devices:
Before beginning operation of the equipment, all safety
appliances must be checked for proper operation.
Safety devices may only be removed after.....
2 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Safety Precautions
Maintenance & Trouble Shooting: 3. This Operator's Manual includes information regarding
Preventive maintenance must be performed at regular inter- the proper preventative maintenance procedures. When
vals as described in the Operator's Manual. ever personnel are performing preventative maintenance
Equipment operator's must be informed before any preven- procedures, be sure that all electrical power and gas
tive maintenance can be performed. supply is disconnected from the equipment, and that
All power systems such as electrical, pneumatic, disconnects are locked and tagged in the "OFF" posi-
hydraulic or mechanical must be dis-connected and tion.
locked out before preventive maintenance may begin.
OPERATOR SAFETY INSTRUCTIONS -
Structural Modification of the Equipment: All industrial equipment, including screen printing equip-
Modifications of this equipment is specifically not allowed. ment, requires a combination of high electrical, pneumatic,
hydraulic or mechanical power for operation. In addition,
automatic screen printing equipment, by its nature, expos-
Cleaning of the equipment: es operators to parts and assemblies which operate at high
Clean away any dirt, lint or other contaminant's at the end speeds and contain numerous moving parts. As with all
of each day. complex industrial equipment, care should be exercised to
carefully observe proper operating procedures and safety
Equipment Noise: precautions.
Under normal operating conditions as described under
Defined Purpose, this equipment will not produce sound Although every effort has been made to design and con-
above the level of 65 db. Depending on local conditions, a struct safe, dependable equipment, it is impossible to fore-
higher continuous sound level may result that could lead to see all circumstances under which this equipment may be
hardness of hearing. In this case, the operational staff must utilized, or to anticipate all possible combinations of factors
wear appropriate safety clothing or protection. which may cause a hazardous condition or situation. It is
therefore imperative that the equipment Operator, as well as
CAUTION: The information con- all other personnel engaged in any phase of the set-up,
tained in this Operator's Manual operation or preventative maintenance of this equipment
has been provided to eliminate consider safety first an important part of their job.
problems from occurring. Be sure
to read through this Operator's The following general safety considerations are offered as
Manual fully before operating your an aid to users of M&R Printing Equipment to assist them
press. in becoming safety conscience.
CAUTION! There are numerous safety features
utilized in the operation of this 1. READ THE OPERATOR'S MANUAL before attempting
equipment. Please be sure you to lift, move, operate or perform maintenance on any piece
know the location of these safety of machinery. Become intimately familiar with all equipment
devices and how they operate controls, their locations, their operation and their effect on
before attempting to operate this equipment function. Keep this Operator's Manual in a clean
equipment. location immediately adjacent to the equipment for a quick
and handy reference.
SAFETY FEATURES -
1. All equipment is provided with either a safety bar, foot 2. BEFORE ATTEMPTING TO START THE EQUIPMENT
switch, yellow safety cords, infrared safety beam, yellow inspect all areas around and adjacent to moving parts for
floor mats or hand switch to stop the equipment. Please possible obstructions: tools, rags, crating remnants etc. Be
know the type on your equipment and its location and func- certain that all Safety Guards, covers, access doors etc., are
tion before operating. properly installed prior to starting operation.
2. Safety guards have been provided to protect the opera- 3. PRACTICE GOOD HOUSEKEEPING: Maintain and area
tor from all moving parts. Please do not remove these adjacent to NOT ON the equipment for tool and color stor-
Safety Guards any time the equipment is in operation. age. Clean up all spills and eliminate all potential trip points
from the operating areas around the equipment to prevent
slipping or falling into the working zone of the equipment.
Do not stand on equipment elements not intended for
this purpose.
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 3
Sprint International HO
Safety Precautions
Maintain a maximum clear area around the equipment for
unobstructed movement of the Operator. Perform
Preventative Maintenance at the intervals specified in this
Operator's Manual.
4. AVOID WEARING LOOSE CLOTHING , long hair, neck
ties etc., when operating this equipment as these can easi-
ly become entangled in moving parts. Safety shoes are like-
wise recommended. Avoid horseplay around the equip-
ment.
5. DO NOT ATTEMPT to operate this equipment if you are
sick, excessively fatigued or under the influence of alcohol
or prescription drugs. Shut off the equipment immediately if
any malfunction occurs or appears imminent. Report any
unsafe equipment or condition promptly in order that cor-
rection can be made as soon as possible.
6. BY-STANDERS should stay well away from the equip-
ment so as not to distract the operator or accidentally move
a control element. Avoid talking to the Operator while the
equipment is in operation.
7. WHEN PERFORMING maintenance work, cleaning the
equipment etc., it is imperative that the main electrical
power and gas supplies be disconnected from the equip-
ment to avoid accidental operation and possible resultant
injury. This is particularly important in the event more than
one person is involved in such duties.
8. A WRITTEN SAFETY PROGRAM should be installed by
all companies owning M&R Printing Equipment. This pro-
gram should cover inspection, maintenance and safety
training on the proper use of the machinery.
4 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Specifications
Patent Pending
SPRINT INTERNATIONAL HO SPECIFICATIONS
MODEL No. SDIHO 38 SDIHO 48 SDIHO 60 SDIHO 72
Heat Chamber Length 8' 8', 10', 12', 14', 16' 8', 10', 12', 14', 16' 8', 10', 12', 14', 16'
Conveyor Belt Width 38" (96.5 cm) 48" (121.9 cm) 60" (152.4 cm) 72" (182.8 cm)
Overall Height 53" (134.6 cm) 53" (134.6 cm) 53" (134.6 cm) 53" (134.6 cm)
Overall Width 75.5" (191.7 cm) 85.5" (217.1 cm) 97.5" (247.6 cm) 109.5" (278.1 cm)
Electrical Requirements 220 v, 1 ph., 20 amps 220 v, 3 ph., 17 amps 220 v, 3 ph., 20 amps 220 v, 3 ph., 28 amps
Input Gas Pressure 5" wc 5" wc 5" wc 5" wc
Burner Input Maximum 200,000 B.T.U. 390,000 B.T.U. 390,000 B.T.U. 390,000 B.T.U.
Shipping Weight 3400 lbs. (1542 kg) 3800 lbs. (1724 kg) 4200 lbs. (1905 kg) 4900 lbs. (2223 kg)
The electrical specifications indicated are based on mathematical calculations which assume
i
ideal conditions exist for electrical supply line values, material used in the installation of electri-
cal service and site preparation. Although every effort has been made to provide accurate elec-
trical specifications, M&R Printing Equipment, Inc., does not assume any liability for damages,
whether consequential or incidental, that may result from the use of the indicated electrical
specifications. M&R Printing Equipment, Inc.,encourages the use of a licensed Electrician for
IMPORTANT the installation of electrical service to this equipment. The equipment when installed must be
electrically grounded in accordance with local codes, or in the absence of local codes, with the
National Electrical Code ANSI/NFPA 70- Latest Edition.
M&R Printing Equipment, Inc. reserves the right to alter specifications in the manufacture of its
products.
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 5
Sprint International HO
Specifications
NOTE: Check with your local NOTES:
i
heating/ventilation Contractor to be
sure that exhaust ducts will meet local
building/fire codes and regulations
before installation. M&R Printing
Equipment does not specify or recom-
IMPORTANT! mend materials for the exhaust ducting
of this equipment.
Exhaust duct size is 12" diameter.
Exhaust Hood duct size is 6" outside diameter
Circulation blower C.F.M. is 3000 to 5000
Exhaust blower C.F.M. is 2200 Maximum
NOTE: Manifold pressure is measured
i
at the burner during the initial start up
of the dryer. (Maximum Input Rate)
IMPORTANT!
NOTE: A proper air displacement sys-
i
tem should be supplied to provide 2200
C.F.M. as make up air for the Sprint
2000's 2200 C.F.M. exhaust system.
Gas supply pipe size should be 1-1/4"
reduced to 1" at the gas inlet to the
dryer. Keep all combustible materials at
IMPORTANT!
least 3 feet from the dryer operating
area.
6 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Installation Instructions
IMPORTANT SAFETY PRECAUTIONS ! Included with your new M&R Sprint International HO dryer,
1. The installation of this appliance must conform with local you will find a package containing all the required hardware
codes, or in the absence of local codes, with the National for assembly of your new dryer. The hardware package con-
Fuel Gas code. ANSI-223.1 - Latest Edition. sists of (1.) No. 10 Self-Tapping Sheet Metal Screws, (2) 3/8"
- 16 X 3/4" Hex Head Bolts with washers, lock washers and
2. The dryer and its individual shut off valve must be dis- nuts, and (3) 5/16" allen wrench. Hand tools which will be
connected from the gas supply during any pressure testing required for the assembly of the M&R Sprint International
of that system at test pressures in excess of 1/2 psig (3.5 HO are 9/16" U.S. Standard Open or Box End Wrench, Pair
kPa). of Pliers, 5/16" Nut Driver, 5/16" Allen Wrench (Included with
hardware) and 3/4" U.S. Standard Open or Box End
3. The dryer must be isolated from the gas supply piping Wrench.
system by closing its individual manual shut off valve during
any pressure testing of the gas supply piping system at test Locate the Master Convection Cabinet (1) in the area where
pressures equal to or less than 1/2 psig (3.5 kPa). the dryer will be placed into operation. Be aware that the
installation of the conveyor sections (4) on the infeed and
4. The dryer when installed must be electrically grounded in delivery of the dryer will increase the overall length of the
accordance with local codes or, in the absence of local dryer. (See Figure 1)
codes, with the National Electrical Code ANSI/NFPA 70 -
Latest Edition.
2 2
1
3a 3a
5. This dryer must not be installed or stored in an area where
it will be exposed to water and/or weather.
6. Clearances from combustible construction as follows: For 6 6
installation on combustible floors, sides (left and right) 36
in., rear 36 in., ceiling 36 in. When installation is to be made
on any type of combustible flooring, the leveling legs must
be adjusted for maximum height to provide as much clear-
ance as possible between the combustible flooring and the
bottom surface of the dryer master heat chamber. Failure to 4 5
5
comply with this instruction may cause a fire hazard.
Figure 1
The following instructions will describe the procedure for
the proper assembly of your new M&R Sprint International 3. Place a level across the length and width of the Master
HO Modular Gas Dryer. Heat Chamber (1). Adjust for proper level at the four corners
using the leveling bolts/legs provided. Level the Master
1. Upon delivery of your new M&R Sprint International HO Heat Chamber from front to rear and side to side.
gas dryer, carefully inspect the crates and packing for any
signs of damage which may have occurred in transit. If it is NOTE: If the dryer is to be installed on
i
determined that the equipment has been damaged in any combustible flooring, adjust all four lev-
manner while in transit to you, notify the Freight Forwarder eling legs so that the distance from the
immediately. M&R Sales and Service, Inc. or M&R Printing bottom underside of the heat chamber
Equipment, Inc. is not responsible for damage which occurs to the surface of the floor is set at the
during transportation of the equipment to you. maximum distance. Do this before
making adjustments to the level of
2. The M&R Sprint International HO Gas Dryer consists of 6 IMPORTANT!
the Master Heat Chamber.
basic components. (Please refer to Figure 1 at top right)
These are, the Master Heat Chamber (1), Heat Chamber 4. Locate and layout the conveyor sections (4) with support
Extension (2), Infeed Exhaust Hood (3), Delivery Exhaust legs (5), Infeed and Delivery Exhaust Hoods (3 & 3a) and
Hood (3a) Conveyor Belt Infeed and Delivery support rails heat chamber extension sections (2). You will note that each
(4) Conveyor Belt Infeed and Delivery section Support Legs section of the dryer is marked with a small yellow number
(5) and lower end caps (6) infeed and delivery sections. tag. Match the corresponding numbers on the Heat Master
Extension sections to the Master Heat Chamber.
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 7
Sprint International HO
Installation Instructions
Do the same with the Infeed/Delivery Exhaust Hoods and
Conveyor sections with support legs.
5. Using the 3/8"-16 hex head bolts with washer and lock
washers provided, attach the conveyor support rail section
on both the infeed and delivery ends of the heat master unit.
Place a level along the length of both support rails on both
ends and adjust for level. Tighten the 3/8"-16 bolts when
the support rails are level. (See illustrations below)
Place level along support rails here.
8. Each Heat Master Extension must be secured to the pre-
vious section in the following manner. Using the No. 10 self-
tapping sheet metal screws supplied and your 5/16" nut dri-
ver, secure the Heat Master Extension sections to the Heat
Master. Depending on the particular model being assem-
bled, each section may require several screws.
6. Each Heat Extension Section (2) of the Master Heat
Section (1) is designed to be assembled to the Heat Master
using a built-in rotary locking mechanism. Carefully lift the
Heat Extension Sections up into position, and insert the
male bracket of the rotary lock mechanism into the female
bracket. (See illustrations below)
9. The last Heat Extension Section on the infeed and deliv-
ery ends of the dryer will require the installation of a "air
plenum end panel" at the end of the section. The panels are
pre-drilled and are installed using the No. 10 self tapping
sheet metal screws supplied. The "air plenum end panel"
serves to "seal" the air plenum and must be installed before
the installation of the infeed/delivery Exhaust Hoods. (See
illustration below)
7. While holding the Heat Extensions in alignment with the
Master Heat Chamber, use the 5/16" "L" shaped allen key
supplied to lock the extension section to the Master Heat
Chamber. There are two rotary locks on the top and each of
the sides of each Heat Extension section. Install the balance
of the Heat Extension Sections in the same manner.
8 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Operation Principles
10. Install the lower conveyor end cap sections (6). The Place the conveyor belt around the infeed roller with the
lower conveyor end cap sections are assembled to the Heat high side of the metal lacing facing "up", and feed the belt
Chamber Extensions in the same manner as described pre- through the Master Heat Chamber.
viously, using the rotary locks with 5/16" "L" shaped allen
key. (See illustration below) 15.Remove the metal pin from one end of the metal lacing.
Connect both ends of the conveyor belt by matching the
metal lacing and re-inserting the metal pin through the con-
nected metal lacing.
16. Return the infeed roller to its proper position by turning
the adjustment bolts clockwise. Move the roller back "out"
until the conveyor belt is properly tensioned. Do not over-
tighten the conveyor belt.
Tracking of the conveyor belt is accomplished from the
infeed end of the conveyor only. Standing at the infeed
end of the dryer, locate the adjustment bolts on both sides
of the conveyor chassis.
11.Install each of the exhaust hoods (3 & 3a) to the Heat If the belt is tracking to the right, adjust the left tension bolt
Chamber Extensions on the infeed and delivery ends of the using a 3/4" wrench by turning it counterclockwise. If the
dryer chamber. The exhaust hoods are assembled to the belt is tracking to the left, adjust the right tension bolt by
heat chamber in the same manner as described above, turning it counterclockwise. The tension bolts should only
using the rotary locks with 5/16" "L" shaped allen key. be adjusted very slightly (approximately 1/4 turn at a time).
NOTE: Upon the initial start up of the
i
dryer you will notice that the elasticity
of the conveyor belt will change in reac-
tion to exposure in the heat chamber.
This is a normal condition. For belt
tracking, allow a minimum of four hours
of running time with both heat and cool
IMPORTANT!
down cycles for proper adjustments.
This practice allows a new belt to com-
pensate for expansion during initial
adjustment and dryer operation.
PRINCIPLES OF OPERATION -
12. Using the 3/8"-16 X 3/4" hex head bolts, washers, lock The standard Sprint International HO model gas dryer is
washers and nuts provided, install the infeed and delivery delivered complete with a Master Heat Chamber and two
conveyor sections (4) with support legs (5) to the Heat additional heat expansion modules, which are located at the
Chamber Extensions. Hand tighten the bolts for now. Again, infeed and delivery ends of the dryer. This configuration is
match the numbers on each section to assure proper well suited for cure/drying of evaporative ink systems such
assembly. as water based or solvent based inks.
13. After the conveyor sections have been loosely bolted The M&R Sprint International HO cure/drys inks through the
together, check to be sure they are squarely aligned and lev- convection process. The convection process of drying is the
eled to the Master Heat Chamber Extensions, then tighten most versatile of the low temperature industrial heating
the bolts securely. processes. Heated air in motion (convection) has a number
of important advantages as a heat transfer medium includ-
14. Install the conveyor belt. To install the conveyor belt, ing:
use a 3/4" wrench to move the infeed roller ONLY all the
way "in" by turning the adjustment bolts counterclockwise. a. Air in motion acts as a carrier for the removal of moisture
or solvents in the drying or evaporating process.
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 9
Sprint International HO
Operation Principles
b. Rapid movement of heated air over the work surface While the plastisol remains in a geled state, the forced heat-
results in greatly accelerated rates of heat transfer. ed air permeates the ink surface. Within a matter of seconds
the gelation concludes and complete flux of the plastisol ink
c. The forced circulation of heated air causes it to reach into begins. It is important to understand that the reaction is
every section of the product, even if the product is irreg- contingent on the weight of the substrate.
ular in shape, permitting a more through drying job.
Depending on the water based system used, the M&R
d. Improved temperature uniformity can be achieved with Sprint International HO functions in a similar fashion. First
rapid circulation, based on a low differential heat between the infra-red attacks the water, hydrocarbon solvent, glycol
the heated air and the material to be heated. and plasticizer components of the ink film. Next, the forced
heated air permeates the ink film. This convected air pene-
e. In some instances, heated air in motion has been shown trates the ink deposit for complete elimination of all volatiles
to remove moisture mechanically as well as through the as heat conduction penetrates all resins, binders and
evaporative process. crosslinkers. This maintains print life while reducing wet and
dry crocking. The following are typical settings used for the
As the printed garment enters the M&R Sprint International cure/drying of water or solvent based inks used for screen
HO it is subjected to heated forced air at a process temper- printing textiles.
ature of 325 to 350 degrees F. for a retention time of 2.5 - 3 1. Hot air section 350 degrees F.
minutes. After entry into the heat chamber, the garment 2. Optional infra-red heat section 850 degrees F.
passes under a series of specially designed "air knifes" 3. Retention time 2.5 to 3 minutes.
which uniformly direct forced heated air across the garment 4. Infra-red panel height 3.5 to 4 inches from the top of the
surface. Exposure to the heated forced air effectively evap- garment surface.
orates moisture and solvents in the ink film. The resultant
by-products are then exhausted from the dryer chamber. DISCLAIMER: As garments vary, and
i
ink manufacturers products may vary
The M&R Sprint International HO is offered with an optional over batches, the end user can reduce,
infrared pre-heat module for use in cure/drying of plastisol modify and run a wide range of ink
inks. The addition of the infrared pre-heat module gives the deposits. Due to these factors, which
M&R Sprint International HO two methods of process heat- are beyond our control, we disclaim all
ing, convection and radiant. This configuration provides a liability for printing variables. ALWAYS
IMPORTANT!
synergistic effect when used in tandem. This synergy offers CHECK AND CONFIRM CURE/DRY
security for the proper fusion of plastisol ink systems. R E S U LT S B E F O R E S TA RT I N G A
Additional advantages are realized in that the conveyor belt PRODUCTION RUN.
speed may be increased, reducing garment shrinkage and
bleed through when using opaque inks. Drying Foam Rubber or Similarly
Textured Materials:
As the garment enters the dryer chamber it is exposed to When drying foam rubber or similarly
infra-red energy. Before any physical, or chemical reaction textured materials, do not exceed 425
can take place in an ink, its liquid components must be first degrees F, or adjust the conveyor belt
be dealt with. Infra-red, or radiant energy, is the most effi- speed for more than 2 minutes expo-
cient and effective method to generate a change in the liq- sure time maximum.
uid components of the ink. CAUTION!
At 850 degrees F. the infra-red panel surface emits the prop-
er wavelength to focus on the liquid portions of both plasti- CURE/DRYING PLASTISOL INKS -
sol and water based ink systems. In plastisol inks, the plas- Plastisol inks are a blend of polyvinyl chloride (PVC) resin
ticizer liquids rapidly absorb the infra-red energy to become finely dispersed in a liquid plasticizer base. This mixture will
aggressive enough to flux the resin. At this stage the plasti- not air dry or permanently adhere to the garment unless it is
sol is at gelatin (semi solid). As the printed garment contin- fused with heat. The amount of heat the plastisol is exposed
ues to travel through the heat chamber, it is further subject- to during the cure/dry process will determine the degree of
ed to forced hot air. Forced heated air temperatures of up to fusion. Normally, 325 degrees F. is sufficient to accomplish
400 degrees F. can be maintained at plus or minus 1 degree the desired curing results...an elastic type solid.
F.
10 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Operation Principles
The fusion process begins when the plastisol is heated to Crock Test -
temperatures above 110 degrees F. As the temperature When curing materials which are not stretchable, such as
increases, the PVC resin begins to swell with plasticizer. At canvas, or when thin ink deposits (halftones) imprints may
125 degrees F., the ink viscosity will decrease to its lowest be tested for crocking by rubbing the imprint with a section
point. It is at this temperature that the ink surface begins to of the un-printed material. If the un-printed material lifts any
flow or level. As the temperature increases to 190 to 240 color from the printed area, it is an indication of an under-
degrees F., the plastisol begins to gel or semi-cure. This cured print. This test should only be performed after the
temperature range is ideal for printing transfers. It may also garment or material has been allowed to cool.
be used to avoid the problems of ink smearing or build-up
on screens while flashing multi-colored direct print designs Checking for Proper Cure of Water Based Inks -
between colors. With the continued popularity of edge to edge printing on
Direct printing however, requires complete curing to achieve cut pieces, and all over printing on finished garments, the
total fusion which occurs between 325 to 350 degrees F. At use of water based inks is increasing. The following infor-
this temperature the PVC resin is completely absorbed by mation is provided as a guide in determining the degree of
the plasticizers, forming a solid but elastic surface. This cure for water based prints.
solid is extremely flexible and exhibits excellent durability
and wash resistance. Unlike plastisol inks, water based inks can look and feel
completely dry but may not be thoroughly cured for opti-
Testing Plastisol for Proper Cure - mum crock-fastness. The term "crock" or "crock-fastness"
When properly cured, plastisol inks produce prints that are refers to an industry specific test method designed to mea-
extremely durable and wash resistant. These attributes sure the amount of color transferred from the surface of col-
should be tested when checking for proper cure. ored textile materials to other surfaces by rubbing the two
surfaces together.
Wash Test -
The most conclusive method of testing is to subject the This test was developed by the AATCC (American
print to a series of wash cycles. Although this test is time Association of Textile Chemists and Colorists) in 1936. The
consuming, it is the most accurate in determining a plasti- test is performed with an instrument called a crock meter.
sol prints durability and resistance to commonly used There are two basic tests for checking colorfastness....a dry
soaps, detergents and bleaches. Provided that the printed crock and a wet crock.
garment is washable, it should be subjected to a minimum
of three, or as many as five wash/dry cycles. A crock meter consists of a weighted arm, a test finger to
hold the cotton test square, a crank to move the arm in a
Use a phosphate detergent in 180 degree F. water. back and forth motion, and a counter. When testing a color,
Inspection after testing should reveal negligible decrease in the print is placed in a specimen holder under the test fin-
color intensity and print adhesion. Any noticeable change ger apparatus. A test square is attached to the test finger via
may be an indication of improper fusion of the plastisol ink. the use of a ring clip. The test finger is then placed on the
color and the crank is turned 10 times, causing in 20 pass-
Stretch Test - es on the print. The test square is then removed and com-
A more immediate method of testing plastisol cure is to per- pared to a color scale and graded based on the amount of
form a stretch test of the cured plastisol print. Although the color transferred to the test square from the print.
stretch test results are not as conclusive as the wash test, it A wet crock test can be performed by wetting the cotton
does offer a much quicker indication of the degree of cure. test square first, then following the instructions as previous-
ly described. For further information contact:
Properly cured plastisol should stretch as much as 20% to
30%. If the printed garment is stretched no more the 20%, American Association of Textile Chemists and Colorists
and the ink film cracks readily, the ink may be under-cured. P.O. Box 12215
The stretch test should be conducted only after the garment Research Triangle Park, NC 27709
has been allowed to cool down after exiting the dryer cham- Phone: 1 (919) 549-8141
ber. Fax : 1 (919) 549-8933
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 11
Sprint International HO
Operation Principles
GRAPHIC APPLICATIONS -
Four types of ink systems are predominant in the graphics
NOTES:
screen print industry. They are as follows:
Straight Lacquers - such as nitrocellulose. These inks rely
on high velocity air flow and high volume exhaust. The sol-
vents volatilize rapidly at room temperature, and even faster
at elevated temperatures. We recommend that you consult
with your ink supplier on the proper temperature and expo-
sure time to properly evaporate these inks.
The forced hot air of the Sprint International HO dryer will
only evaporate the solvent in this ink type. The optional
infra-red section will not prove helpful with these lacquers,
and may in fact damage the substrate.
Modified Lacquers - and modified acrylics are representa-
tive of the next category. These inks are often highly plasti-
cized and use resins of a much lower molecular weight.
These products if overheated will exhibit tackiness and may
block when stacked. If the substrate permits, the optional
infra-red section will offer faster conveyor speeds. The con-
veyor belt speed should be set for a higher speed and the
temperature set to suit the ink and substrate.
Short Oil Enamels - do react faster to higher consistent
temperatures. These fast dry enamels will react well under
infra-red heat, so the Sprint International HO's optional pre-
heat panel should be considered for maximum throughput.
Typically the substrates which are printed with enamels are
not adversely effected by higher temperatures.
Water Based - inks are generally used for printing flat
stock. These inks most often contain solvents and cross
linker agents. The "rule of thumb", as in the case of enam-
els if the substrate will permit, is the use of the optional
infra-red section to achieve the higher temperatures
required. For heat sensitive substrates, adjust the conveyor
belt speed and temperature to suit.
12 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Controls & Adjustments
Ignition Sequence -
1. Open the manual shut-off valve located at the gas supply
inlet to the dryer. Gas will be supplied to the dryer when the
manual shut-off valve handle is aligned with the gas supply
line. (See illustration below)
To Shut the Dryer Off -
1. Press the red "OFF" push button located under "BURN-
ER OPERATION". (See illustration below)
Turn the red "EMERGENCY STOP" push button located on
the control panel to release it. During normal operation, the
"EMERGENCY STOP" push button will be in the de-acti-
vated position, (OUT), IN for "EMERGENCY".
2. Push the green push button marked "On" under "Start
Dryer". Upon activation, this push button will illuminate con-
firming that electrical power has been supplied to the dryer.
(See illustration below)
2. To insure that the dryer properly cools down and to pre-
vent damage to the conveyor belt from over exposure to the
extreme temperatures present in the heat chamber, the
M&R Sprint International HO features an automatic time
delay cool down mode which is automatically activated
when you press the red "OFF" push button under the
"START DRYER" section of the control panel. Upon activa-
tion, the Sprint International HO's circulation blower and
conveyor belt drive will continue to operate until the internal
temperature in the heat chamber reaches 150 degrees F.
3. Push the green push button marked "On" under "BURN- When the internal heat chamber temperature reaches 150
ER OPERATION". Upon activation this push button will illu- degrees F, the circulation blower and the conveyor belt drive
minate confirming that electrical power has been supplied will automatically stop. Upon activation, the push button will
to the flame control system. At the same time a "PURGE" illuminate confirming the start of the cool down sequence.
indicator will appear in the lower left corner of the touch
screen. After 30 - 40 seconds the "PURGE" cycle will com-
plete automatically and the "PURGE" indicator will change
to "FLAME ON". (Fig. 3 top right)
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois 13
Sprint International HO
Controls & Adjustments
3. Press "IN" the red "EMERGENCY STOP" push button
located on the control panel. Close the manual shut-off
valve on the gas supply line to the dryer. The manual shut-
off valve is closed when the operating handle is at a 90
degree position in respect to the gas supply line. (See Fig. 5
below)
Computer Down-Load Cable -
Located on the rear side of the control panel is a cable used
to down-load and access program information. (See illus-
tration below)
14 M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
Sprint International HO
Controls & Adjustments
Green Tower Light -
This green tower light provides a visual indica-
tion of the dryer's operation at a distance. The Emergency Stop Push Button -
light will be illuminated when ever the present This red colored push button is used to imme-
temperature inside the dryer chamber or the diately shut-down operation of the gas burner
infrared temperature sensors (if activated) are in the event of an emergency situation. Simply
within range. In the event that the temperature press the red push button "IN" to activate the
should exceed or fall below the present tem- Emerge