Thick sheet thermoforming In the process, various thermoforming molds are inevitably used. When manufacturing molds, attention should be paid to material issues. Another key is demolding, which should be carried out on the premise of ensuring smooth demolding to avoid affecting the finished product. If these two problems are solved, we can use thick sheet thermoforming to manufacture plastic products of various shapes.

　　In the thick sheet thermoforming production process, if the pre-processing work is not in place, the thick sheet thermoforming product will deform at the moment of demolding, and the quality of the deformed product will inevitably be affected. In order to prevent similar problems from happening again, we should formulate corresponding solutions to this problem.

　　To prevent Thick sheet thermoforming Deformation after demolding, the cooling water temperature should be checked first, and the nozzle water volume should be adjusted to the specified range. Second, the wind direction at various positions can also be adjusted to find the pressure suitable for generating thick plate foaming.

　　When loading the upper mold, the pressure of the vibrating upper mold is used to force smooth demolding; if the bottom air can be appropriately increased, it will also help to ensure the quality of the thermoformed product. If these problems cannot be solved, the upper mold can only be remade to overcome the deformation problem.

　　According to the characteristics of thick sheet thermoforming technology, selecting suitable equipment can not only improve the product qualification rate, but also improve production efficiency and reduce costs. According to actual work needs, automatic or manual thermoforming equipment can be selected, with the corresponding number of operators, and the large-scale thermoforming operation is in good condition.

　　If the following problems are found on the thick sheet thermoforming product, it indicates that the quality of the thick sheet thermoforming product is unqualified.

　　Bubbles: In the production process of thick sheet thermoforming sheets, due to the air contained in the heated plastic material, there are bubbles in the finished sheet, especially in the production process of transparent thermoforming sheets. If the bubbles are too large, they will be considered defective products.

　　Scratches: Thick sheet thermoforming products, especially transparent thermoforming shells, have scratches. If the marks are too long and too large, the thermoforming shell will become a defective product and cannot be used for high-end packaging.

　　Pulling lines: Thick sheet thermoforming Some unwanted linear protrusions (not in the mold) generated during molding need to be solved by re-modifying the mold (reducing the height and increasing the roundness) and adding an extra pressing mold (we call it the upper mold). If the pull band is too large, it is considered a defective product and cannot be used for high-end thermoforming packaging. However, in the field of parts turnover trays, as long as the pull bands are neatly arranged and do not affect the use function, they should be considered qualified products. Pulling is also called: pulling, cramping, etc.

　　Water ripples: In the production process of thick sheet thermoforming sheets, due to the different thermoforming materials and processing technologies of thick sheets, the surface of the finished sheets has water ripples, especially in the production process of transparent thick sheet thermoforming sheets. If the water ripples are too large, they will be considered defective products. Generally, the thicker the thick sheet thermoforming sheet, the more obvious the water ripples. Qualified PET materials rarely have water ripples, but most thick sheet thermoforming PVC sheets have water ripples.

　　Crystal points: Thick sheet thermoforming In the plate production process, especially in the production process of transparent thick sheet thermoforming plates, tiny dust in the air falls on the heated plastic material, resulting in transparent defects. If the defects are too large, they are considered defective products.