The quality assurance of rotary screen printing machine can be paid attention from three aspects:
First, quality assurance of main parts. Main parts in the manufacturing process of rotary screen printing machine, such as: transmission tooth box, main drive roller, backup roller, squeegee, magnetic table, parts in flowering device, radiator, circulation system, various aluminum alloy castings and many more. These main customs must carry out strict quality tracking and strict quality control during the manufacturing process. The important parts of the rotary screen printing machine are the main drive roller and the guide belt support roller. The main drive roller in the rotary screen printing machine refers to the drive roller that drives the printing tape, and its runout, coaxiality, and static balance requirements are high. The main drive roller initially used a special process method to spray a thin layer of silicon carbide on the surface of the roller body. However, as the usage time goes by, the sand layer of the roller surface will gradually peel off or wear, making the roller surface and the printing guide belt. The friction between the belts is reduced, and the belt is slippery, which directly affects the printing effect. After the improvement, the process of knurling directly on the surface of the roller body is used. The effect is very good, although this improvement increases the wear of the printing belt. Degree, but this wear is not sufficient for the print belt replacement cycle. The rotary roller printing support belt roller bodies produced by Holland STORK Company are made of aluminum profiles, which are easy to wear and are not resistant to corrosion, and the worn sections are often polygonal, causing the printing belt to fluctuate up and down during operation, affecting the flowers. Accuracy and slurry uniformity. Changing the aluminum material to stainless steel not only improves the wear resistance of the roller surface, but also improves its corrosion resistance.
Second, the quality of parts and components. Complete quality assurance In addition to the quality of parts and components produced by the factory, the quality of some purchased parts and accessories must also be strictly guaranteed. Otherwise it will not only affect the overall performance of the machine, but also affect the reputation of the host plant. Rotary screen printing machine in the matching parts such as: drive motor, printing tape, pulp pump, rotary drive bearings, drying room conduction band, electrical components, pneumatic components and so on.
Third, final assembly quality assurance. If a device is not carefully assembled and debugged, the quality of its parts and components will not be as good as that of a rotary screen printer. Therefore, a detailed assembly process and technical requirements for the assembly of the whole machine should be worked out. Each car must go through rigorous inspection and empty car test before leaving the factory to ensure that its performance meets the technical requirements.
Third, the rotary screen printing machine common faults and exclusion
For a rotary screen printing machine, the ideal printing effect should be an excellent combination of the performance of the equipment, the printing process and the operator, but due to various conditions and various negligence in the production process. , It will often cause some failure of the equipment. The following is a brief analysis of several major failures and remedies that may occur during the operation of a rotary screen printing machine.
1, printing guide belt deviation
Rotary screen printing machine must go through corrective operation and conduction band trimming during installation and debugging, so that the deviation amount of the printing belt can be controlled within the range that can be corrected. However, as the use of time increases, the degree of deviation of the conduction band may become larger and larger, resulting in loss of control. What is the cause of this phenomenon?
There are many factors that affect the deviation of printed belts. The main points are summarized as follows: the deformation of the printing belt, the non-uniform tension control of the belt tension roller, the different supporting force of the backup roller, and the obstruction or failure of the correction device.
The following situations are analyzed.
1.1 Printing guide belt deformation
After a long period of operation, the printed conductors redistribute their internal stresses and cause deformation of the conduction band. In addition, the aging of the rubber layer of the conduction band causes the conduction band to be uneven during the continuous operation. When this happens, you must consider replacing the new conduction band.
1.2 Effect of tension roller
The influence of the tension roller on the deviation of the conduction band is mainly manifested in: the tension force acting on the two ends of the tension roller is different, which results in the non-parallel between the tension roller and the main driving roller. The solution is to adjust the tension roller and the main driving roller. In parallel, at the same time, the tension of the conduction band must be taken into consideration when adjusting the tension.
1.3 Effect of the support roller
When the compressed air pressure is less than the specified requirements of 0.6-0.~8MPa or the air path is not smooth, the force at both ends of the support roller will be uneven, so that the magnitude of the supporting force at both ends is not the same. The solution is to ensure the air supply pressure, check and clean the air circuit.
1.4 Effect of Deviation Correction Device
The failure of the correcting device or the jamming of the gear mechanism in the worm gear box or the wear of the worm and worm can affect the normal operation of the correcting device, resulting in runaway deviation of the conduction band. The solution is to check whether the fixing screw of the correction probe is loose, whether the contact between the probe and the guide belt edge is within the controllable range; check whether the worm gear shaft is jammed or if the transmission is blocked, such as the worm gear, adjust it properly. In case of serious gaps and wear, replacement should be considered. At the same time, frequent starting and reversing of the rectifying motor may also cause the motor to be burned out. At this time, it is necessary to check whether the rectifying motor is operating normally.
2, twisted or broken network
The occurrence of twisted or broken nets in the printing process of the printing machine often interrupts production and affects the normal operation of the production. At the same time, the county has different degrees of influence on product quality and production costs. There are many factors that lead to twisted or broken nets, which are analyzed one by one.
2.1 Effect of printing tape
The impact of printed conductors on rotary screens is mainly reflected in the following three aspects:
First, the difference between the running speed of the conduction band and the running speed of the rotary screen is too large, causing the rotary screen to distort or even break. The rotary screen printing machine takes into account the synchronous cooperation between the printing tape and the rotary screen in the design. The running speed of the guide tape is usually about 2 to 4/4 thousandth faster than the linear speed of the rotary screen. If the actual operation of the drive roller due to the diameter change or slippage in the belt drive and other phenomena will make the speed difference between the two become larger, so that the rotary screen to produce active or passive squeeze, there twist network or broken network. The solution is to strictly control the diameter tolerance of the main drive roller; properly adjust the tension roller tension value so that the conduction band does not slip during operation.
Second, in the course of operation, the conduction band swings right and left over the ambassador's circular net passive distortion. The main reason for this phenomenon is that the conduction band is out of control. The frictional force between the conduction band and the circle network causes the circle network to be axially squeezed with the left and right swing of the conduction band. The greater the amount of deviation, the greater the axial friction force during the course of deviation and the distortion of the circle network. The solution is to strictly control the deviation of the conduction band.
Thirdly, the gap adjustment between the circular net and the guide strip is not proper, so that the round net is squeezed radially to cause a twisted net. For general fabrics, the gap between the mesh and the conduction band is preferably 0.3mm, but for heavy fabrics, the clearance should be increased properly, the gap is too large, and the circle mesh may be disengaged from the conduction band. At this time, the circle The net will be affected by the squeegee pressure; if the gap adjustment is too small or if a negative gap occurs, the circular net will be squeezed by the guide belt and the circular net will be distorted, and the net-breaking phenomenon will occur as time passes. The solution is to adjust the gap between the wire mesh and the conduction band to ensure that the wire mesh operates under normal conditions.
2.2 The impact of assembly
Carelessness during installation and commissioning often results in twisted or broken nets.
First, when the net heads at both ends of the circular net are installed with different concentricities, the round nets will be subjected to prestress caused by the discordance of the two ends. This pretension will quickly turn into torque with the circular motion of the circular net. The twisting of the circular net causes the circular net to twist or even break. The solution is to adjust the concentricity of the net seat and then install the circular net to run.
Second, when the tightness of the installation of the transmission bearings at both ends of the rotary screen is inconsistent, it can also lead to twisted or broken nets. Whether it is a wide-width printing machine or a narrow-width printing machine, when the dust-proof ring of both ends of a rotary net is over-tightened with the housing, the flexibility of bearing operation is greatly reduced, and even death may occur. For a narrow rotary screen printing machine, since the transmission is a single-sided transmission, this installation error is avoided.
For weight
2.3 The impact of the operation
With sophisticated assembly, no careful operation will not work. Fatal damage to the rotary screen can also be caused by mistakes in the operation. When handling circular nets, they must cooperate with each other. The action should be light. Do not make the rotary screen bump on other hard objects. Any inadvertent bumping will bring hidden dangers to the normal use of the rotary screen. Furthermore, be careful when loading and unloading the squeegee. Don't bump into the wall. Once you leave a scar on the circle, it is likely to become a breakthrough. In addition, the tension of the rotary screen should be appropriate, and the pressure of the scraper must be gentle and without impact. To achieve this, the one-way throttle valve on the air lifter of the scraper should be properly adjusted so that the airflow is gentle and there is no obvious impact. Only in this way can the service life of the rotary screen be extended, thereby reducing costs and increasing economic efficiency.
2.4 Other Influencing Factors
The factors affecting the twisting of the circular net are not only the above-mentioned ones, but also the selection of the circular net material, the bonding of the net head and the circular net, the maintenance of the round net, etc., and neither of them can be neglected.
3, plugging the slurry
Rotary screen printing machine may appear in the course of the use of circular mesh plugging phenomenon. Infiltration of the slurry is not sufficient, making the printed pattern lines unclear or even random, thus affecting the quality of the product. The main reasons for this effect are the following:
3.1 Effect of grey cloth
The grey cloth has not been dusted well before the stamping machine rubber blanket, and the dust, fluff, and impurities on the surface of the grey cloth often block the circular mesh holes; therefore, the clean gray cloth is very important for printing. During use, the operator can achieve the purpose of dust removal by adjusting the pressure of the brush roller in the dust removal device according to the degree of cleanness of the gray cloth, so as to ensure the cleanness of the gray cloth splashed into the printing belt.
3.2 Effect of Slurry
If the printing paste is not well-filtered before use, impurities and insoluble particles in the printing paste will be hit by the pulp supply device to the wire net to block the mesh, resulting in difficulty in penetration of the paste and printing. The viscosity of the slurry also has a certain influence on the permeability.
The impact of the round net
In practical production applications, different days of nickel mesh should be selected according to different fabric types and different flower types. In general, it is more appropriate to use 80-100 meshes for printed patterns, and 125 meshes or even higher for individual fine lines. When a pattern of circular nets is not used for unloading, the circular nets should be cleaned immediately, and the paste attached to the net walls and net heads should be cleaned, and then carefully placed in clean, dust-free rooms. When using paint printing, the same measures should be taken to prevent mesh plugging from causing the pulp path to be blocked.
4, escape flowers
When the rotary screen printing machine prints multiple sets of color patterns, the precise positional relationship between the color registrations in the printing process cannot be maintained in a stable state, resulting in the dislocation of the patterns, and the result of the misalignment causes the whiteness or coloration between the color registrations. This phenomenon we call the escape flower. The phenomenon of flower escape is caused by a combination of factors. The reasons are summed up in the following points: transmission errors, deviations from the flowers, squeegee errors, operational errors, errors in the grid making, conduction bands, and properties of the fabric itself. Wait. Let's analyze them one by one.
4.1 Transmission error
As already mentioned, at the time of design, the running speed of the wire mesh belt is faster than the circumferential speed of the wire mesh by about two-tenths to four-thousandths, but once the speed difference between the two is too great or is in the process of running The slippage of the belt leads to the dislocation of the pattern between the trappings and the escape of flowers.
4.2 Flowering error
The adjustment range of the rotary screen printing machine is: 2Omm longitudinally to the floral soil, which is realized by a differential structure (magnetic bar-type rotary screen printing machine is not limited); lateral pair of flowers ± lOmm, realized by the thread structure; diagonally facing the flower ±3mm, achieved by the eccentric structure; rotary screen printing machine adjusts the gap between the various parts of the flower adjustment mechanism and the looseness of the cam pair will affect the rotary screen printing machine to the flower precision and produce escape phenomenon. Therefore, the parts with serious wear in this mechanism should be replaced promptly. In addition, it should be checked whether the “0†ring, which plays a damping role in the longitudinal flower system, is invalid. If it fails, it should be replaced in time to prevent the escape of flowers. phenomenon.
4.3 Scratch error
If the installation of the squeegee blade is not firm and flat, or the width of the squeegee blade and the scale marked on the squeegee support are inconsistent, the pattern dislocation will be caused and the flower escape will occur.
4.4 Operational Error
The phenomenon of escape from flowers caused by mistakes in operation is mainly manifested in the sudden rise and fall speed of the printing machine, the abuse of emergency stop buttons, and the unevenness of fabric sewing heads. The most fundamental way to avoid these influencing factors is to do a good job of personnel training management, and strictly follow the operating procedures and production procedures.
4.5 The nature of the fabric itself
The nature of the fabric itself is not stable, and there is a pre-stress before printing. When the printing paste or coating is encountered in the printing process, it will shrink, resulting in escape. Therefore, try to use the pre-treated fabric as much as possible. In addition, according to the different types of fabric before printing, choose hot plastic or water-soluble patch glue respectively, so that the gray cloth will not shrink when it is pasted on the printing belt, thus avoiding the escape caused by fabric shrinkage. Flower phenomenon. At present, there is a normal-temperature platen glue on the market, which reflects that the use effect is very good.
First, quality assurance of main parts. Main parts in the manufacturing process of rotary screen printing machine, such as: transmission tooth box, main drive roller, backup roller, squeegee, magnetic table, parts in flowering device, radiator, circulation system, various aluminum alloy castings and many more. These main customs must carry out strict quality tracking and strict quality control during the manufacturing process. The important parts of the rotary screen printing machine are the main drive roller and the guide belt support roller. The main drive roller in the rotary screen printing machine refers to the drive roller that drives the printing tape, and its runout, coaxiality, and static balance requirements are high. The main drive roller initially used a special process method to spray a thin layer of silicon carbide on the surface of the roller body. However, as the usage time goes by, the sand layer of the roller surface will gradually peel off or wear, making the roller surface and the printing guide belt. The friction between the belts is reduced, and the belt is slippery, which directly affects the printing effect. After the improvement, the process of knurling directly on the surface of the roller body is used. The effect is very good, although this improvement increases the wear of the printing belt. Degree, but this wear is not sufficient for the print belt replacement cycle. The rotary roller printing support belt roller bodies produced by Holland STORK Company are made of aluminum profiles, which are easy to wear and are not resistant to corrosion, and the worn sections are often polygonal, causing the printing belt to fluctuate up and down during operation, affecting the flowers. Accuracy and slurry uniformity. Changing the aluminum material to stainless steel not only improves the wear resistance of the roller surface, but also improves its corrosion resistance.
Second, the quality of parts and components. Complete quality assurance In addition to the quality of parts and components produced by the factory, the quality of some purchased parts and accessories must also be strictly guaranteed. Otherwise it will not only affect the overall performance of the machine, but also affect the reputation of the host plant. Rotary screen printing machine in the matching parts such as: drive motor, printing tape, pulp pump, rotary drive bearings, drying room conduction band, electrical components, pneumatic components and so on.
Third, final assembly quality assurance. If a device is not carefully assembled and debugged, the quality of its parts and components will not be as good as that of a rotary screen printer. Therefore, a detailed assembly process and technical requirements for the assembly of the whole machine should be worked out. Each car must go through rigorous inspection and empty car test before leaving the factory to ensure that its performance meets the technical requirements.
Third, the rotary screen printing machine common faults and exclusion
For a rotary screen printing machine, the ideal printing effect should be an excellent combination of the performance of the equipment, the printing process and the operator, but due to various conditions and various negligence in the production process. , It will often cause some failure of the equipment. The following is a brief analysis of several major failures and remedies that may occur during the operation of a rotary screen printing machine.
1, printing guide belt deviation
Rotary screen printing machine must go through corrective operation and conduction band trimming during installation and debugging, so that the deviation amount of the printing belt can be controlled within the range that can be corrected. However, as the use of time increases, the degree of deviation of the conduction band may become larger and larger, resulting in loss of control. What is the cause of this phenomenon?
There are many factors that affect the deviation of printed belts. The main points are summarized as follows: the deformation of the printing belt, the non-uniform tension control of the belt tension roller, the different supporting force of the backup roller, and the obstruction or failure of the correction device.
The following situations are analyzed.
1.1 Printing guide belt deformation
After a long period of operation, the printed conductors redistribute their internal stresses and cause deformation of the conduction band. In addition, the aging of the rubber layer of the conduction band causes the conduction band to be uneven during the continuous operation. When this happens, you must consider replacing the new conduction band.
1.2 Effect of tension roller
The influence of the tension roller on the deviation of the conduction band is mainly manifested in: the tension force acting on the two ends of the tension roller is different, which results in the non-parallel between the tension roller and the main driving roller. The solution is to adjust the tension roller and the main driving roller. In parallel, at the same time, the tension of the conduction band must be taken into consideration when adjusting the tension.
1.3 Effect of the support roller
When the compressed air pressure is less than the specified requirements of 0.6-0.~8MPa or the air path is not smooth, the force at both ends of the support roller will be uneven, so that the magnitude of the supporting force at both ends is not the same. The solution is to ensure the air supply pressure, check and clean the air circuit.
1.4 Effect of Deviation Correction Device
The failure of the correcting device or the jamming of the gear mechanism in the worm gear box or the wear of the worm and worm can affect the normal operation of the correcting device, resulting in runaway deviation of the conduction band. The solution is to check whether the fixing screw of the correction probe is loose, whether the contact between the probe and the guide belt edge is within the controllable range; check whether the worm gear shaft is jammed or if the transmission is blocked, such as the worm gear, adjust it properly. In case of serious gaps and wear, replacement should be considered. At the same time, frequent starting and reversing of the rectifying motor may also cause the motor to be burned out. At this time, it is necessary to check whether the rectifying motor is operating normally.
2, twisted or broken network
The occurrence of twisted or broken nets in the printing process of the printing machine often interrupts production and affects the normal operation of the production. At the same time, the county has different degrees of influence on product quality and production costs. There are many factors that lead to twisted or broken nets, which are analyzed one by one.
2.1 Effect of printing tape
The impact of printed conductors on rotary screens is mainly reflected in the following three aspects:
First, the difference between the running speed of the conduction band and the running speed of the rotary screen is too large, causing the rotary screen to distort or even break. The rotary screen printing machine takes into account the synchronous cooperation between the printing tape and the rotary screen in the design. The running speed of the guide tape is usually about 2 to 4/4 thousandth faster than the linear speed of the rotary screen. If the actual operation of the drive roller due to the diameter change or slippage in the belt drive and other phenomena will make the speed difference between the two become larger, so that the rotary screen to produce active or passive squeeze, there twist network or broken network. The solution is to strictly control the diameter tolerance of the main drive roller; properly adjust the tension roller tension value so that the conduction band does not slip during operation.
Second, in the course of operation, the conduction band swings right and left over the ambassador's circular net passive distortion. The main reason for this phenomenon is that the conduction band is out of control. The frictional force between the conduction band and the circle network causes the circle network to be axially squeezed with the left and right swing of the conduction band. The greater the amount of deviation, the greater the axial friction force during the course of deviation and the distortion of the circle network. The solution is to strictly control the deviation of the conduction band.
Thirdly, the gap adjustment between the circular net and the guide strip is not proper, so that the round net is squeezed radially to cause a twisted net. For general fabrics, the gap between the mesh and the conduction band is preferably 0.3mm, but for heavy fabrics, the clearance should be increased properly, the gap is too large, and the circle mesh may be disengaged from the conduction band. At this time, the circle The net will be affected by the squeegee pressure; if the gap adjustment is too small or if a negative gap occurs, the circular net will be squeezed by the guide belt and the circular net will be distorted, and the net-breaking phenomenon will occur as time passes. The solution is to adjust the gap between the wire mesh and the conduction band to ensure that the wire mesh operates under normal conditions.
2.2 The impact of assembly
Carelessness during installation and commissioning often results in twisted or broken nets.
First, when the net heads at both ends of the circular net are installed with different concentricities, the round nets will be subjected to prestress caused by the discordance of the two ends. This pretension will quickly turn into torque with the circular motion of the circular net. The twisting of the circular net causes the circular net to twist or even break. The solution is to adjust the concentricity of the net seat and then install the circular net to run.
Second, when the tightness of the installation of the transmission bearings at both ends of the rotary screen is inconsistent, it can also lead to twisted or broken nets. Whether it is a wide-width printing machine or a narrow-width printing machine, when the dust-proof ring of both ends of a rotary net is over-tightened with the housing, the flexibility of bearing operation is greatly reduced, and even death may occur. For a narrow rotary screen printing machine, since the transmission is a single-sided transmission, this installation error is avoided.
For weight
2.3 The impact of the operation
With sophisticated assembly, no careful operation will not work. Fatal damage to the rotary screen can also be caused by mistakes in the operation. When handling circular nets, they must cooperate with each other. The action should be light. Do not make the rotary screen bump on other hard objects. Any inadvertent bumping will bring hidden dangers to the normal use of the rotary screen. Furthermore, be careful when loading and unloading the squeegee. Don't bump into the wall. Once you leave a scar on the circle, it is likely to become a breakthrough. In addition, the tension of the rotary screen should be appropriate, and the pressure of the scraper must be gentle and without impact. To achieve this, the one-way throttle valve on the air lifter of the scraper should be properly adjusted so that the airflow is gentle and there is no obvious impact. Only in this way can the service life of the rotary screen be extended, thereby reducing costs and increasing economic efficiency.
2.4 Other Influencing Factors
The factors affecting the twisting of the circular net are not only the above-mentioned ones, but also the selection of the circular net material, the bonding of the net head and the circular net, the maintenance of the round net, etc., and neither of them can be neglected.
3, plugging the slurry
Rotary screen printing machine may appear in the course of the use of circular mesh plugging phenomenon. Infiltration of the slurry is not sufficient, making the printed pattern lines unclear or even random, thus affecting the quality of the product. The main reasons for this effect are the following:
3.1 Effect of grey cloth
The grey cloth has not been dusted well before the stamping machine rubber blanket, and the dust, fluff, and impurities on the surface of the grey cloth often block the circular mesh holes; therefore, the clean gray cloth is very important for printing. During use, the operator can achieve the purpose of dust removal by adjusting the pressure of the brush roller in the dust removal device according to the degree of cleanness of the gray cloth, so as to ensure the cleanness of the gray cloth splashed into the printing belt.
3.2 Effect of Slurry
If the printing paste is not well-filtered before use, impurities and insoluble particles in the printing paste will be hit by the pulp supply device to the wire net to block the mesh, resulting in difficulty in penetration of the paste and printing. The viscosity of the slurry also has a certain influence on the permeability.
The impact of the round net
In practical production applications, different days of nickel mesh should be selected according to different fabric types and different flower types. In general, it is more appropriate to use 80-100 meshes for printed patterns, and 125 meshes or even higher for individual fine lines. When a pattern of circular nets is not used for unloading, the circular nets should be cleaned immediately, and the paste attached to the net walls and net heads should be cleaned, and then carefully placed in clean, dust-free rooms. When using paint printing, the same measures should be taken to prevent mesh plugging from causing the pulp path to be blocked.
4, escape flowers
When the rotary screen printing machine prints multiple sets of color patterns, the precise positional relationship between the color registrations in the printing process cannot be maintained in a stable state, resulting in the dislocation of the patterns, and the result of the misalignment causes the whiteness or coloration between the color registrations. This phenomenon we call the escape flower. The phenomenon of flower escape is caused by a combination of factors. The reasons are summed up in the following points: transmission errors, deviations from the flowers, squeegee errors, operational errors, errors in the grid making, conduction bands, and properties of the fabric itself. Wait. Let's analyze them one by one.
4.1 Transmission error
As already mentioned, at the time of design, the running speed of the wire mesh belt is faster than the circumferential speed of the wire mesh by about two-tenths to four-thousandths, but once the speed difference between the two is too great or is in the process of running The slippage of the belt leads to the dislocation of the pattern between the trappings and the escape of flowers.
4.2 Flowering error
The adjustment range of the rotary screen printing machine is: 2Omm longitudinally to the floral soil, which is realized by a differential structure (magnetic bar-type rotary screen printing machine is not limited); lateral pair of flowers ± lOmm, realized by the thread structure; diagonally facing the flower ±3mm, achieved by the eccentric structure; rotary screen printing machine adjusts the gap between the various parts of the flower adjustment mechanism and the looseness of the cam pair will affect the rotary screen printing machine to the flower precision and produce escape phenomenon. Therefore, the parts with serious wear in this mechanism should be replaced promptly. In addition, it should be checked whether the “0†ring, which plays a damping role in the longitudinal flower system, is invalid. If it fails, it should be replaced in time to prevent the escape of flowers. phenomenon.
4.3 Scratch error
If the installation of the squeegee blade is not firm and flat, or the width of the squeegee blade and the scale marked on the squeegee support are inconsistent, the pattern dislocation will be caused and the flower escape will occur.
4.4 Operational Error
The phenomenon of escape from flowers caused by mistakes in operation is mainly manifested in the sudden rise and fall speed of the printing machine, the abuse of emergency stop buttons, and the unevenness of fabric sewing heads. The most fundamental way to avoid these influencing factors is to do a good job of personnel training management, and strictly follow the operating procedures and production procedures.
4.5 The nature of the fabric itself
The nature of the fabric itself is not stable, and there is a pre-stress before printing. When the printing paste or coating is encountered in the printing process, it will shrink, resulting in escape. Therefore, try to use the pre-treated fabric as much as possible. In addition, according to the different types of fabric before printing, choose hot plastic or water-soluble patch glue respectively, so that the gray cloth will not shrink when it is pasted on the printing belt, thus avoiding the escape caused by fabric shrinkage. Flower phenomenon. At present, there is a normal-temperature platen glue on the market, which reflects that the use effect is very good.
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