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Introduction to PVC Film Door Laminating Process

The schematic diagram of the cold glue coating process is as follows:

Introduction to PVC Film Door Laminating Process
Introduction to PVC Film Door Laminating Process

The schematic diagram of the PUR hot glue coating process principle is as follows:

Introduction to PVC Film Door Laminating Process
Introduction to PVC Film Door Laminating Process

The profile coating process is as follows:

  1. Prepare the boards, profiles, glue, curing agent, affinity agent, containers, and mixing equipment to be coated. In winter, boards and profiles need to be transported to the insulation workshop 24 hours in advance for insulation.
Introduction to PVC Film Door Laminating Process
Introduction to PVC Film Door Laminating Process

Second, check the laminating machine first and then run it on a trial basis.

  1. Remove the protective film from the prepared boards and profiles (the profiles extruded by the profile factory do not need to be pasted with protective film. The newly extruded profiles cannot be covered with film immediately. They must wait until the profiles are completely cooled before covering them). If the boards and profiles are completely If the surface of the profile is not clean, use ethanol or methylene chloride to clean the surface (profiles that are severely bent cannot be covered with film).
  2. Place the cleaned boards and profiles on the supporting frame, and place a six-meter profile in the middle of the laminating machine. First, position the machine according to the boards and profiles. First, fix the guide rollers to prevent the profiles from slipping during lamination. Go astray.
  3. Adjust the small pressure wheel to the best effect according to the coating surface of the plate and profile, so that the force of the left and right pressure wheels is symmetrical. The pressure wheel and the profile work at the same time. If it is found that the small pressure wheel does not rotate, it means that the pressure wheel is not working and needs to be reset. Adjustment.
  4. Use the cold glue machine to put the adjusted glue into the squeegee box, and the PUR hot glue machine to heat the PUR glue. Put the affinity agent into the affinity liquid device.
  1. Start up and run. For the cold glue machine, the weather-resistant film enters the upper oven for heating after scraping the glue. The general temperature is about 50 degrees Celsius. After drying, most of the solvent in the glue scraped on the film has evaporated, and the film Keep walking along the machine. The PUR hot glue machine directly guides the film through the glue head to scrape glue. Some manufacturers have precipitates on the back of the film or the surface tension is too small and has not been corona treated. The back of the film does not stick to PUR glue. This kind of film cannot be directly covered with PUR glue. Of course, some manufacturers will scrape the film roll before scraping the glue. Adding a methylene chloride or MEK coating device can effectively solve the problem of the film not sticking to glue.
  2. The plates and profiles pressed on the transmission roller enter the machine. They first pass through the surface coating equipment with affinity agent, and then enter the infrared heating area for heating. The temperature is generally 55 degrees Celsius. The heated profile surface can basically reach 42 degrees. Then it goes through a hot air machine to volatilize the affinity agent coated on the surface of the profile, and then the profile enters the coating area.
  3. The weather-resistant film heated by squeegee enters the main coating area through the composite pressure roller (the first large pressure roller). Before coating, it is necessary to decide whether the film needs to be heated a second time based on the working environment. When the weather-resistant film enters the main coating area, if it goes awry, the film can be adjusted left and right according to the photoelectric corrector on the laminating machine.
  4. The profile and film meet in the main lamination area. The plate, profile and film are pressed together through pressure wheels. After passing through multiple pressure wheels, the air behind the film is slowly pressed out. When laminating, it must be pressed from the center outward and rolled from the large side to the small side. As the profile moves forward and the pressure wheel rolls, the film will firmly cover the surface of the plate and profile according to the shape of the plate and profile. As long as the substrate has a linear shape, perfect coating can be achieved through pressure wheels of different shapes or materials and softness and hardness.
  5. After passing through the main pressing wheel area, the coated profile is completely covered. At this time, the film must be cut off manually with a blade. Some laminating machines are equipped with automatic cutting devices. The coated panels and profiles then go through the protective film device to stick the protective film on the surface of the coated profiles. Finally, the coated profiles are placed on the workbench through the rear supporting frame for packaging.

Notice:

When the temperature is low, for example, the workshop is lower than 15 degrees Celsius, the coated profiles cannot be stacked together, which is not conducive to the curing of the glue on the surface of the coated panels and profiles. The profiles that have just been coated with the film cannot be stacked so that the small side presses the large side, which will cause indentations on the coated surface. The environment when laminating boards and profiles is very important. The temperature of the laminating machine should be adjusted according to the indoor temperature and humidity at the time, and whether to use a humidifier should be considered. Practical experience in adjusting the temperature during profile coating is very important. When covering profiles, it is easier to cover outer frames and inner fans; it is more difficult to cover battens, caps and pipes. Specially shaped substrates require some shaping molds to be covered.

  1. After passing through the main pressing wheel area, the coated profile is completely covered. At this time, the film must be cut off manually with a blade. Some laminating machines are equipped with automatic cutting devices. The coated panels and profiles then go through the protective film device to stick the protective film on the surface of the coated profiles. Finally, the coated profiles are placed on the workbench through the rear supporting frame for packaging.

Notice:

When the temperature is low, for example, the workshop is lower than 15 degrees Celsius, the coated profiles cannot be stacked together, which is not conducive to the curing of the glue on the surface of the coated panels and profiles. The profiles that have just been coated with the film cannot be stacked so that the small side presses the large side, which will cause indentations on the coated surface. The environment when laminating boards and profiles is very important. The temperature of the laminating machine should be adjusted according to the indoor temperature and humidity at the time, and whether to use a humidifier should be considered. Practical experience in adjusting the temperature during profile coating is very important. When covering profiles, it is easier to cover outer frames and inner fans; it is more difficult to cover battens, caps and pipes. Specially shaped substrates require some shaping molds to be covered.

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