Electropneumatic Hot Melt Application Heads EP 25 / EP 25 S / EP 25 SD

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1 Electropneumatic Hot Melt Application Heads Manual P/N A - English - NORDSON ENGINEERING GMBH LÜNEBURG GERMANY

2 Note This manual applies to the entire series. Order number P/N = Order number for Nordson products Notice This is a Nordson Corporation publication which is protected by copyright. Original copyright date No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Nordson Corporation. The information contained in this publication is subject to change without notice. Trademarks AccuJet, AquaGuard, Asymtek, Automove, Autotech, Blue Box, CF, Can Works, Century, Clean Coat, CleanSleeve, CleanSpray, Compumelt, Control Coat, Cross Cut, Cyclo Kinetic, Dispensejet, DispenseMate, Durafiber, Durasystem, Easy Coat, Easymove Plus, Econo Coat, EPREG, ETI, Excel 000, Flex O Coat, Flexi Spray, Flow Sentry, Fluidmove, Fluidshooter, FoamMelt, FoamMix, Helix, Horizon, Hose Mole, Hot Shot, Hot Stitch, Isocoil, Isocore, Iso Flo, KB30, Little Squirt, Magnastatic, MEG, Meltex, MicroSet, Millenium, Mini Squirt, Moist Cure, MultiScan, Nordson, OmniScan, Opticoat, Package of Values, PluraFoam, Porous Coat, PowderGrid, Powderware, Pro Flo, ProLink, PRX, RBX, Rhino, S. design stylized, SC5, SCF, Select Coat, Select Cure, Slautterback, Smart Coat, Spray Squirt, Spraymelt, Super Squirt, Sure Bond, Sure Coat, System Sentry, Tela Therm, Trends, Tribomatic, UniScan, UpTime, Versa Coat, Versa Screen, Versa Spray, Watermark, When you expect more are registered trademarks - - of Nordson Corporation. ATS, Auto Flo, AutoScan, BetterBook, Chameleon, CanNeck, Check Mate, CPX, Control Weave, Controlled Fiberization, EasyClean, Ebraid, Eclipse, Equi=Bead, Fillmaster, FlexiCoat, Gluie, Ink Dot, JR, Maxima, MicroFin, Minimeter, Mountaingate, Multifil, OptiMix, Pattern View, PluraMix, Primarc, Prism, Pro Meter, Pro Stream, Process Sentry, PurTech, Pulse Spray, Saturn, Seal Sentry, Select Charge, Select Series, Sensomatic, Shaftshield, Spectral, Spectrum, Sure Brand, Sure Coat, Swirl Coat, Vista, Walcom, Rings (Design) are trademarks - - of Nordson Corporation. Designations and trademarks stated in this document may be brands that, when used by third parties for their own purposes, could lead to violation of the owners' rights. COV_EN_409017A 1998 Nordson Corporation

3 Table of Contents I Table of Contents Safety... 1 Description 1. Intended Use... 1 Unintended Use - Examples Residual Risks Manual References Illustrations... 3 Application Head EP Application Head EP 5 S... 4 Application Head EP 5 SD Functioning... 6 ID Plate... 6 Installation 1. Unpacking Transport Installation... 7 Exhausting Adhesive Fumes Storage Disposal Electrical Connection... 8 Laying Cable... 8 Connecting Application Head... 8 Triggering Solenoid Valve Nordson Corporation

4 II Table of Contents Installation (contd.) 7. Pneumatic Connection... 9 Compressed Air Filter (Accessory)... 9 Heated Air Assembly (Accessory)... 9 Connecting Compressed Air... 9 Connecting Spray Air (EP 5 S and EP 5 SD) Lubricating or Not Lubricating the Control Air Operation with Non Lubricated Control Air Operation with Lubricated Control Air Installing Heated Hoses... 1 Connecting... 1 Disconnecting... 1 Relieving Pressure... 1 Second Open-jawed Wrench... 1 Operation 1. Triggering Solenoid Valve Setting Temperatures Maximum Operating Temperature Adjusting Control Air Pressure Maximum Control Air Pressure Setting Adhesive Application Quantity Stem Stroke Adjustment Adjusting Spray Pattern (EP 5 S) Adjusting Spray Pattern (EP 5 SD) Settings Record Maintenance 1. Relieving Pressure Daily Maintenance Inspection for External Damage External Cleaning of Application Head Release-coated Application Heads External Cleaning of Nozzle Regular Maintenance... 0 Changing Type of Adhesive Maintenance Record Nordson Corporation

5 Table of Contents III Repair / Retrofitting 1. Retrofitting Application Head with New Control Modules.... Replacing Single Control Modules Retrofitting Control Module Removing Control Module Disassembling Control Module Changing O rings and Applying Oil... 5 Applying Oil to O rings... 5 Parts Overview Assembling Control Module Installing Control Module... 6 Troubleshooting 1. Troubleshooting Table... 7 Specifications 1. General Data Power Cables Nordson Corporation

6 IV Table of Contents 1998 Nordson Corporation

7 Electropneumatic Hot Melt Application Heads 1 Safety WARNING: Please follow the safety regulations enclosed as a separate document and the specific safety notes in the entire documentation. Description 1. Intended Use EP 5 hot melt application heads - hereafter also referred to as application heads - may only be used for the application of hot melt materials. Any other use is considered to be unintended. Nordson will not be liable for personal injury or property damage resulting from unintended use. Intended use also includes the observance of Nordson safety instructions. Nordson recommends obtaining detailed information about the materials to be used. Unintended Use - Examples - The application heads may not be used under the following conditions: In defective condition When modifications or changes have been made by the customer In a potentially explosive atmosphere When hot melt materials not suitable for the unit are used When the values stated under Specifications are not complied with. The application heads may not be used to process the following materials: Polyurethane hot melt material (PUR) Explosive and flammable materials Erosive and corrosive materials Food products Nordson Corporation

8 Electropneumatic Hot Melt Application Heads. Residual Risks The application head is designed to protect operating personnel from possible risks. However, some residual risks can not be avoided. Personnel must consider the following: Risk of burns on the hot application head: from hot adhesive, when replacing filter cartridges (option) and when making adjustments. Inhalation of potentially hazardous hot melt material vapors. 3. Manual References This manual applies to the entire series. The position numbers in the illustrations do not correspond to the position numbers in the technical drawings and the spare parts lists. The illustrations show only the essential unit components. All other components and details can be found in the enclosed technical drawings (Refer to Parts List) Nordson Corporation

9 Electropneumatic Hot Melt Application Heads 3 4. Illustrations Application Head EP 5 Figure 1 shows the essential components of the application head EP EPAH300L199A197 Fig Hose connection (hot melt). Body 3. Control module 4. Control air connection 5. Solenoid valve 6. Stem stroke adjustment 7. Power connection 8. Bracket 9. Nozzle EP Surface nozzle 11. Leakage hole (on the side of the control module) 1998 Nordson Corporation

10 4 Electropneumatic Hot Melt Application Heads 4. Illustrations (contd.) Application Head EP 5 S Figure shows the essential components of the application head EP 5 S EPAH313L199A197 Fig. 1. Hose connection (hot melt). Body 3. Control module 4. Control air connection 5. Solenoid valve 6. Stem stroke adjustment 7. Power connection 8. Bracket 9. Nozzle EP 5 S 10. Spray air connection EP 5 S 11. Leakage (on the side of the control module) 1998 Nordson Corporation

11 Electropneumatic Hot Melt Application Heads 5 Application Head EP 5 SD Figure 3 shows the essential components of the application head EP 5 SD I 10 1 A 13 EPAH314L199A197 Fig Hose connection (hot melt). Body 3. Control module 4. Control air connection 5. Solenoid valve 6. Stem stroke adjustment 7. Power connection 8. Bracket 9. Nozzle EP 5 SD 10. Spray air adjustment screw, inner air 11. Leakage hole (on the side of the control module) 1. Spray air adjustment screw, outer air 13. Spray air connection EP 5 SD 1998 Nordson Corporation

12 R 6 Electropneumatic Hot Melt Application Heads 5. Functioning The EP 5 application heads are used to apply adhesives e.g. as bead application (EP 5), spiral shaped (EP 5 S) or atomization application (EP 5 SD). The control module and body are separate from one another. This enables temperatures of 00 C / 39 F or 60 C / 500 F (high temperature or T version) to be maintained over longer periods of time. The model EP 5 V is designed for high flow rates and high viscosity. The application head is heated with electric heater cartridges. The temperature is monitored continuously by temperature sensors and controlled by an electronic temperature controller located in the electrical cabinet of the application unit. The patented spray method (EP 5 S, EP 5 SD) mixes hot melt material with spray air inside of the spray nozzle. ID Plate Nordson Engineering GmbH D 1337 Lüneburg - Germany 1st box Type of application head nd box Nordson order number 3rd box Serial number 4th box Operating voltage V = Volt 5th box Power consumption W = Watt V W CFSY084S Fig Nordson Corporation

13 Electropneumatic Hot Melt Application Heads 7 Installation WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. 1. Unpacking Unpack carefully, then check for transport damage. Reuse packaging materials or dispose of according to local regulations.. Transport NOTE: The hot melt application head is a high precision, valuable part. Handle very carefully! Protect the nozzle from damage. 3. Installation Install the application head in the appropriate place in the coating machine. Observe the following: Do not operate in an explosive atmosphere Protect from humidity, vibrations, dust and drafts Ensure easy access to parts relevant to maintenance and operation Protect nozzle from damage. Exhausting Adhesive Fumes Ensure that adhesive fumes do not exceed the prescribed limits. Suction off adhesive fumes. Ensure sufficient ventilation of the surroundings. 4. Storage Do not store outside! Protect from humidity and dust. Do not lay unit on the nozzle. Protect the nozzle from damage. 5. Disposal When your Nordson product has exhausted its purpose and/or is no longer needed, dispose of it according to local regulations Nordson Corporation

14 8 Electropneumatic Hot Melt Application Heads 6. Electrical Connection WARNING: Risk of electrical shock. Failure to observe may result in personal injury, death, or equipment damage. Laying Cable WARNING: Ensure that cables do not touch rotating and/or hot parts. Do not pinch cables. Check regularly for damage. Replace damaged cables immediately! Connecting Application Head WARNING: Only operate with the voltage shown on the ID plate. 1. Connect power cable with plug (1) to the socket on the heated hose.. Use safety clips (when available) to secure the plug connection. 1 EPAH301S055A197 Fig. 5 Triggering Solenoid Valve WARNING: Only operate with the voltage shown on the ID plate. Trigger the solenoid valve only when the application head is heated to operating temperature! When the hot melt material is too cold, seals in the control module can be damaged Nordson Corporation

15 Electropneumatic Hot Melt Application Heads 9 7. Pneumatic Connection The application head may only be connected to pressure-controlled and conditioned compressed air. NOTE: The control air must either be lubricated, or it may not be lubricated at all. Read the chapter Lubricating or Not Lubricating the Control Air carefully. The spray air may not be lubricated. Compressed Air Filter (Accessory) Safe operation and lifetime of pneumatically driven application heads essentially depend on conditioning of the compressed air. Dust or condensation will increase the wear on sliding surfaces and sealing elements, thereby causing damage. To avoid these contrary influences, the control air for Nordson application heads must be conditioned by an air filter with air condensate bowls. The air conditioning unit cleans and dries the compressed air. NOTE: The filter mesh size may not exceed 40 m. Heated Air Assembly (Accessory) Nordson heated air assembly kits are used to condition spray air for spray air application heads and guns. They consist of a pressure control valve with filter, a solenoid valve and a fine metering valve. For additional information, refer to the manual Heated Air Assembly. NOTE: The spray air should be heated with an air preheater. Connecting Compressed Air Connect the control air hose to the air connection (1). NOTE: Ensure that control air is on at all times. Among other functions, it keeps the nozzle closed when EMERGENCY OFF occurs or when the system comes to a standstill. This prevents hot melt material from dripping out of the nozzle. 1 EPAH30S055A197 Fig Nordson Corporation

16 10 Electropneumatic Hot Melt Application Heads 7. Pneumatic Connection (contd.) Connecting Spray Air (EP 5 S and EP 5 SD) Connect the spray air hose to the air connections (3 or 4) of the spray nozzles (1 or ). NOTE: The spray air may never be lubricated EP 5 S EP 5 SD EPAH315S055A197 Fig. 7 Lubricating or Not Lubricating the Control Air Hot melt application heads of the series EP 5 manufactured from 1997 on may be operated with lubricated as well as with non lubricated control air. This has become possible due to modifications to the control module: Control module cylinder with a special inner coating Piston O rings with an increased Shore hardness. NOTE: Lubricating the control air once means that the air must always be lubricated, because the lubricated control air washes out the factory applied lubricant on the control modules and the solenoid valves. The new design control modules can be identified by an all around groove (see arrow, fig. 8). EPAH06S064A0997 Fig Nordson Corporation

17 Electropneumatic Hot Melt Application Heads 11 Operation with Non Lubricated Control Air If new design control modules / application heads are connected to a compressed air system which has previously been lubricated, simply stopping the air lubrication is not sufficient. The lubricant residue in the system would get into the control modules and the solenoid valves. It would thus wash out the factory applied lubricant on these parts, greatly reducing the lifetime of the components. For operating with non lubricated control air ensure that: the unit is set to absolutely non lubricated operation no oil leaking from a defective compressor gets into the air system control air is always supplied to the application head. It keeps the control modules closed when EMERGENCY OFF occurs or when the system comes to a standstill. This prevents hot melt material from dripping out of the nozzle. NOTE: Nordson will assume no liability for damage resulting from unapproved air lubrication, not even for short periods of time. Operation with Lubricated Control Air The new design control modules or the application heads equipped with them can also be operated with lubricated air. NOTE: Lubricating the control air once means that the air must always be lubricated, because the lubricated control air washes out the factory applied lubricant on the control modules and the solenoid valves. Use only this lubricant: Lubricant P/N Klüber Unisilkon TK00/ Nordson Corporation

18 1 Electropneumatic Hot Melt Application Heads 8. Installing Heated Hoses WARNING: Hot! Risk of burns. Wear heat protective gloves. Connecting 1 3 If there is cold hot melt material in the hose connection fitting (1) and/or hose connection (), these components must be heated until the hot melt material softens (approx. 80 C/176 F). 1. First connect the hose (3) electrically to the unit.. Heat application head and hose until the hot melt material softens (approx. 80 C/176 F). 3. Screw the hose onto the unit. MXHH001S050B0997 Fig. 9 Disconnecting WARNING: System and hot melt material pressurized. Relieve pressure before disconnecting heated hoses. Failure to observe can result in serious burns. Relieving Pressure 1. Set motor speed(s) of the unit feeding the material to 0 min 1 ; switch off motor(s).. Place a reservoir under the nozzle of the application head. 3. Activate the solenoid valve electrically or manually. Repeat this procedure until no more hot melt material flows out. 4. Re use hot melt material or dispose of properly according to local regulations. Second Open-jawed Wrench Using a second open jawed wrench prevents the hose connection fitting on the unit from turning. MXHH00S033A095 Fig Nordson Corporation

19 Electropneumatic Hot Melt Application Heads 13 Operation WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. 1. Triggering Solenoid Valve Trigger the solenoid valve only when the application head is heated to operating temperature! If the adhesive is too cold, seals in the control module can be damaged. WARNING: Operate only with the voltage shown on the ID plate.. Setting Temperatures The procedure for setting the temperatures is described in the temperature controller manual. Temperature controllers are not part of the application head. They can be located e.g. in the electrical cabinet of a hot melt application unit or in a separate electrical cabinet. Maximum Operating Temperature 00 C / 39 F; 60 C / 500 F with the high temperature model. NOTE: The maximum operating temperature may not be exceeded. Nordson will assume no warranty or liability for damage resulting from incorrect temperature settings. 3. Adjusting Control Air Pressure The control air pressure for the control module is individually adjusted for each application with an external compressed air control valve. The compressed air control valve is not part of the application head. NOTE: Ensure that the application head is always provided with control air. The control air keeps the control modules closed when EMERGENCY OFF occurs or when the system comes to a standstill. This prevents hot melt material from dripping out of the control modules. Maximum Control Air Pressure 6 bar / 0.6 MPa / 87 psi NOTE: The maximum control air pressure may not be exceeded. Nordson will assume no warranty or liability for damage caused by incorrect pressure settings Nordson Corporation

20 14 Electropneumatic Hot Melt Application Heads 4. Setting Adhesive Application Quantity The adhesive application quantity depends on the desired adhesive application weight and on the substrate speed. Settings are usually made with the pump speed dials. The optimum settings must be determined by trial and error. The speed dials are located e.g. in the electrical cabinet of the adhesive applicator or in a separate electrical cabinet. Depending on the model of the hot melt adhesive application system, the pump speed control can also occur with a tachometer generator or an electronic pressure controller. Stem Stroke Adjustment All control modules are equipped with a stem stroke adjustment used for fine metering of the hot melt material quantity. Max mm Max in. Max mm Max in Figure 11 shows: WARNING: Hazard! The stem stroke adjustment knob has no upper setting limit. If compressed air is connected, never completely turn up the adjustment knob / adjustment screw; it may jump out. CAUTION: The stem stroke may only be adjusted when the application head is heated up! Failure to observe may cause damage to seals. Latching stem stroke adjustment (1) Stem stroke adjustment with adjustment screw () and locknut (3) Non adjustable stroke limitation (4). NOTE: The stem stroke adjustment knob has no upper setting limit; starting from the bottom, it may only be turned a maximum of ¼ turns upward. This corresponds to a nozzle stem stroke of maximum 1. mm. Failure to observe may cause excessive wear or malfunction. Experience has shown that a stroke adjustment of max. 0.5 to 0.6 mm (which corresponds to 1 turn) has proven to be sufficient. Stem stroke Hot melt rate XXAH157S130A0797 Counterclockwise (+) = increase Clockwise (-) = decrease Increase Decrease Fig Nordson Corporation

21 Electropneumatic Hot Melt Application Heads Adjusting Spray Pattern (EP 5 S) The spray air must always be warmed up with an air preheater. The spray pattern is optimized by alternately adjusting: Adhesive quantity (on the unit feeding the material) Stem stroke adjustment (on the application head) Spray air pressure (on separate pressure controller) Set spray air pressure to approx. 0.5 bar / 7.5 psi / 0.05 MPa.. Trigger solenoid valve; material flows out. 3. Set desired amount of material. 4. Optimize spray pattern by modifying the spray air pressure with the connection () and by modifying the stem stroke adjustment (1). Fig. 1 EPAH303S097A Nordson Corporation

22 16 Electropneumatic Hot Melt Application Heads 6. Adjusting Spray Pattern (EP 5 SD) The spray air must always be warmed up with an air preheater. The spray pattern is optimized by alternately adjusting: Adhesive quantity (on the unit feeding the material) Stem stroke adjustment (on the application head) Spray air pressure (on separate pressure controller) Air adjustment screws I (5) and A () Release tube nut (3) by turning 1/ rotation to the left.. Turn the air cap (4) such that the two outer pairs of holes are perpendicular to the direction of application. 3. Tighten tube nut (3). 4. On the separate pressure controller, set spray air pressure to approx. 3 bar / 43.5 psi / 0.3 Mpa; later adapt the spray air pressure to the spray pattern. 5. Trigger solenoid valve; material flows out. 6. Set desired amount of material Stop air supply to the nozzle by turning the air adjustment screws I (5) and A () to the right. 8. Use the inner air adjustment screw I (5) to set an even spray pattern. 9. Set the spray width needed with the outer air adjustment screw A (). Fig. 13 EPAH316S097A Nordson Corporation

23 Electropneumatic Hot Melt Application Heads Settings Record Copy before filling out or use a pencil. Production information Adhesive Cleaning agent Basic settings Application head Basic settings Temperature Manufacturer Max. processing temperature Viscosity Manufacturer Flash point Control air pressure Spray air pressure Stem stroke (rotations) Heating zone application head Undertemperature Overtemperature Notes Form filled out by: Name Date 1998 Nordson Corporation

24 18 Electropneumatic Hot Melt Application Heads Maintenance WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. NOTE: Maintenance is an important preventive measure for maintaining operating safety and extending the operational lifetime of the unit. It should not be neglected under any circumstances. 1. Relieving Pressure WARNING: System and hot melt material pressurized. Before disconnecting heated hoses and replacing filter cartridges, relieve system pressure. Failure to observe can result in serious burns. WARNING: Hot! Risk of burns. Wear heat protective gloves. 1. Set motor speed(s) of the unit feeding the material to 0 min 1 ; switch off motor(s).. Place a reservoir under the nozzle of the application head. 3. Trigger the solenoid valve electrically or manually. Repeat until hot melt material no longer flows out of the nozzle. 4. Re use hot melt material or dispose of properly according to local regulations. EPAH08L058A0997 Fig. 14 Principle drawing material-pressure relief 1998 Nordson Corporation

25 Electropneumatic Hot Melt Application Heads 19. Daily Maintenance The stated intervals are based on general experience. Depending on the location of the unit, the production conditions and the operating time, other maintenance intervals may prove necessary. Unit Part Activity Interval Refer to Application head Inspection for damage External cleaning Daily Daily Page 19 Nozzle External cleaning Daily Page 0 Inspection for External Damage WARNING: If damaged parts endanger the operating safety of the application head and/or the safety of personnel, switch off the application head and have the damaged parts replaced by qualified personnel. Use only original Nordson spare parts. External Cleaning of Application Head External cleaning prevents impurities created during production from causing unit malfunctions. CAUTION: Do not damage or remove warning signs. Damaged or removed warning signs must be replaced by new ones. CAUTION: Never use hard tools. Use extreme care when handling the nozzle. Remove adhesive residue with a cleaning agent recommended by the adhesive manufacturer whenever possible. Heat with an air heater if necessary. Remove dust, fluffs, etc. with a vacuum cleaner or a soft cloth. Release-coated Application Heads CAUTION: Do not use hard or metal tools to clean. Do not use wire brushes! The release coating could become damaged. Use only soft aids (wooden or PTFE spatulas or soft brushes) Nordson Corporation

26 0 Electropneumatic Hot Melt Application Heads. Daily Maintenance (contd.) External Cleaning of Nozzle CAUTION: Clean the nozzle very carefully; never use hard or metallic tools to clean. A damaged nozzle will result in uneven adhesive application, and it will need to be repaired. WARNING: Hot! Risk of burns. Wear heat protective gloves. 1. Remove hot melt material residue from the nozzle promptly with a soft cloth. This should be done before the material cracks.. Remove severe and hardened residue with a wooden or PTFE spatula if necessary. 3. Regular Maintenance The stated intervals are based on general experience. Depending on the location of the unit, the production conditions and the operating time, other maintenance intervals may prove necessary. Unit part Activity Interval Refer to Application head Rinse with cleaning agent When soiled or when replacing adhesive - Nozzle Disassemble and clean When soiled - Control module Check leakage hole Weekly - Filter (option) Separate manual Changing Type of Adhesive NOTE: Before changing the adhesive, find out whether the new adhesive may be mixed with the old. The adhesives may be mixed: The new adhesive can be used to rinse out the old adhesive. The adhesives may not be mixed: Thoroughly rinse with a cleaning agent recommended by the adhesive manufacturer. NOTE: Dispose of adhesive and cleaning agent according to local regulations Nordson Corporation

27 Electropneumatic Hot Melt Application Heads 1 4. Maintenance Record Copy before filling out or use a pencil. Unit part Activity Date Name Date Name Application head Rinse with cleaning agent Nozzle Disassemble and clean Control module Check leakage hole Filter (option) Replace filter screen 1998 Nordson Corporation

28 Electropneumatic Hot Melt Application Heads Repair/Retrofitting WARNING: Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this document and all other related documentation. 1. Retrofitting Application Head with New Control Modules Beginning with units manufactured in 1997, EP 5 application heads may be operated with either non lubricated or lubricated compressed air. If older models are to be retrofitted for operation with non lubricated compressed air, the control modules must be replaced. If an older application head is going to be retrofitted in order to operate with non lubricated control air, these measures must be taken: Replace control module with new design control module Replace solenoid valve Completely change the pressurized control air supply to absolute non lubricated air. Adjust the stem stroke (see Stem Stroke Adjustment).. Replacing Single Control Modules If only some of the control modules of an application head are to be replaced, the application head must continue to be operated with lubricated control air. These lubricants may be used: Lubricant P/N Klüber Unisilkon TK00/ Klüber Unisilkon TK00/ Nordson Corporation

29 Electropneumatic Hot Melt Application Heads 3 3. Retrofitting Control Module If a control module is going to be retrofitted in order to be operated with non lubricated control air, these measures must be taken: Remove control module (see Removing Control Module and Installing Control Module) Disassemble control module (see Disassembling Control Module and Assembling Control Module) Replace the cylinder (see Parts Overview) Replace the piston O rings and apply oil (see Parts Overview) Replace all solenoid valves Completely change the compressed control air supply to non lubricated air Adjust the stem stroke (see Stem Stroke Adjustment). 4. Removing Control Module WARNING: Hot! Risk of burns. Wear heat protective gloves. 1. Detach air connections. Heat up application head until the hot melt material softens 3. Unscrew fixing screws and remove the control module. EPAH305S050A197 Fig Nordson Corporation

30 4 Electropneumatic Hot Melt Application Heads 5. Disassembling Control Module WARNING: Hot! Risk of burns. Wear heat protective gloves NOTE: Re assemble only parts of the same control module or completely replace with new Nordson parts. Do not mix parts from different control modules. NOTE: Disassembly of the body (9) is not described. Special tools and particular expertise are required for disassembly. If there is any leakage in the body, the control module must be completely replaced. NOTE: Nordson will not be responsible for control modules' malfunctioning resulting from incorrect assembly or use of incorrect parts. 1. Detach air connections.. Heat up the application head to approx. 100 C / 1 F to prevent the fixing screws (3) from breaking when unscrewed. The application head may cool down again after removal of the screws. 3. If the cylinder (4) is to be replaced, first unscrew the stem stroke adjustment (1), then unscrew fixing screws (3). If the cylinder (4) is not to be replaced, begin by unscrewing the fixing screws (3). 4. Note the position of the small vent bore before extracting the cylinder (4). XXAH159S10A0797 Fig. 16 NOTE: Do not slide the piston (7) off the body (9)! Failure to observe may cause leakages, if residual and hardened hot melt material sticks on the stem/needle Nordson Corporation

31 Electropneumatic Hot Melt Application Heads 5 6. Changing O rings and Applying Oil 1. Carefully push the piston (7, Fig. 16) down in order to prevent the needle from coming out of the body (9, Fig. 16).. Remove O rings (5 and 6, Fig. 16). 3. Mount the new O rings (5 and 6, Fig. 16) on the piston (7, Fig. 16) - using only your fingers. Do not use any tools for this. 4. Apply oil to the O rings. Applying Oil to O rings Before the cylinder (4) is placed over the piston again, the O rings (5 and 6, Fig. 16) must be replaced, and oil must be thoroughly applied to them. NOTE: The O rings must be oiled, regardless of whether the application head is to be operated with lubricated or non lubricated control air. Lubricant P/N Klüber Unisilkon TK00/ Parts Overview The table indicates which cylinders and O rings must be used in order to operate the application head (gun) with non lubricated control air. Control module Cylinder O ring * Figure P/N Part of these application heads P/N Specification * EP 5, EP 5 S, EP 5 SD x P/N * See the respective product manual's Spare Parts List * O Rings are marked with a white dot 1998 Nordson Corporation

32 6 Electropneumatic Hot Melt Application Heads 7. Assembling Control Module 1. If the stem stroke adjustment (1) had been removed from the cylinder (4), screw on again. Replace the sealing rings (), P/N Replace O ring (8) Ensure that the O rings ( 5 and 6) have been oiled with the prescribed lubricant (Refer to Applying Oil to O rings). 4. Carefully slide the cylinder (4) over the piston (7). Ensure that the small vent bore is in the same position. 5. If possible, apply mounting paste to the thread of the fixing screws to prevent seizing of the threads. Mounting paste: Never Seez, order no. P/N Tighten the fixing screws (3) steadily and crosswise. 7. Re fit the control air connections. 8. Adjust the stem stroke in case it had been changed (see Stem Stroke Adjustment). XXAH159S10A0797 Fig Installing Control Module 1. Heat up application head until the hot melt material softens.. If possible, apply mounting paste to the thread of the fixing screws to prevent seizing of the threads. Mounting paste: Never Seez, order no. P/N Replace O ring(s). Order no. P/N mm 4. Place control module on application head and tighten the fixing screws mutually/crosswise. EPAH306S050A197 Fig Nordson Corporation

33 Electropneumatic Hot Melt Application Heads 7 Troubleshooting 1. Troubleshooting Table The following troubleshooting table assumes that all other system components function correctly. Problem Possible Cause Corrective Action Refer to No adhesive Application head has not yet reached operating temperature Wait until temperature has been reached, check temperature setting if necessary Page 13 Not enough adhesive in the application unit Pump of the hot melt material application unit does not work Fill - Check - Control air not connected Connect Page 9 Nozzle blocked Clean nozzle Page 0 Filter (option) blocked Clean filter and replace filter screen - Nozzle stem is stuck Replace control module Page No adhesive: application head is cold Temperature not correctly set on temperature controller Set correct temperature Page 13 Plug has no contact Secure plug Page 8 Heater cartridge(s) defective Replace heater cartridge(s) - Adhesive application is not exact Nozzle partially blocked or damaged Unscrew nozzle (when warm) and clean or replace - - Production parameters not attuned to one another Adjust parameters, change if necessary - Unsuitable adhesive Consult adhesive manufacturer Data sheet The open time is too long The open time is too short Application temperature too high Set temperature lower Page 13 Unsuitable adhesive Consult adhesive manufacturer Data sheet Application temperature too low Set temperature higher Page 13 Unsuitable adhesive Consult adhesive manufacturer Data sheet 1998 Nordson Corporation

34 8 Electropneumatic Hot Melt Application Heads Specifications NOTE: The specifications are valid only for standard application heads. 1. General Data Product Product Name Hot melt material application head (Options: release coating, high temperature (T version), high material flow rate (V version) Operating Voltage Maximum Power Consumption Refer to ID plate Refer to ID plate Type of Control Module Variations: Standard, Zero Cavity Filter (Option) Variations: none, 0.1 mm, 0. mm, 0.4 mm Nozzles Variations: 0.6 mm, 0.8 mm, 1.0 mm, 1. mm Temperature Sensor Variations: Fe CuNi (FE/KO), Pt 100, Ni 10 Solenoid Valve Variations: MV 4 U 4 V DC, MV 40 1U 40 V AC, MV 110 1U 110 V AC Degree of Protection IP 30 Max. Control Air Pressure 6 bar / 0.6 MPa / 87 psi Hose Connection Fitting Variations: Inside diameter: 8 mm, 13 mm Max. Operating Temperature Max. Ambient Temperature for Solenoid Valves 00 C / 39 F; 60 C / 500 F with high temperature version Approx. 55 C / 131 F Weight Approx g 1998 Nordson Corporation

35 Electropneumatic Hot Melt Application Heads 9. Power Cables 8 Green/yellow Ground conductor Blue 3 Brown Heater 4 Black 5 Black Solenoid valve Pin insert HAN 7D KWU 6 Red 7 Blue Thermo lead + Thermo lead - XXAH135L046B0598 Fig. 19 Power cable for temperature sensor Fe CuNi (FE/KO) 8 Green/yellow Ground conductor Blue 3 Brown Heater 4 Black 5 Black Solenoid valve Pin insert HAN 7D KWU 6 Red (black) Temperature sensor Pt White (black) XXAH49L046B0598 Fig. 0 Power cable for temperature sensor Pt Black Black 3 5 Green/yellow Heater Temperature sensor Ni 10 Ground conductor XXAH19L046B0598 Fig. 1 Power cable with temperature sensor Ni Nordson Corporation

36 30 Electropneumatic Hot Melt Application Heads 1998 Nordson Corporation

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