Thick-sheet thermoforming During the process, various thermoforming molds are inevitably required, and material selection must be carefully considered when manufacturing these molds. Another critical factor is demolding; it should be carried out under conditions that ensure smooth release, so as not to compromise the finished product. If these two issues are properly addressed, we can use thick-sheet thermoforming to produce plastic parts of diverse shapes.

　　During the production of thick-sheet thermoforming, inadequate pre‑treatment can cause deformation of the finished parts at the moment of demolding, inevitably compromising product quality. To prevent such issues from recurring, we should develop targeted solutions to address this problem.

　　To prevent Thick-sheet thermoforming If deformation occurs after demolding, first check the cooling water temperature and adjust the nozzle water flow to within the specified range. Second, you can also fine-tune the air direction at each location to identify the pressure settings that best prevent blistering on thick plates.

　　When the upper mold is loaded, the pressure generated by its vibration helps ensure smooth demolding; additionally, appropriately increasing the backing air can also contribute to maintaining the quality of thermoformed products. If these issues cannot be resolved, the only solution is to remake the upper mold to address the deformation problem.

　　Based on the characteristics of thick‑sheet thermoforming, selecting the appropriate equipment not only boosts product yield but also enhances production efficiency and reduces costs. Depending on operational requirements, you can opt for either automated or manual thermoforming machines, paired with an adequate number of operators, to ensure smooth, large‑scale production.

　　If the following issues are found in thick-sheet thermoformed products, it indicates that the product quality does not meet the required standards.

　　Bubbles: During the production of thick-sheet thermoformed sheets, air trapped in the heated plastic material can result in bubbles in the finished product, particularly in the manufacture of transparent thermoformed sheets. If the bubbles are excessively large, the product is deemed defective.

　　Scratches: Thick-sheet thermoformed products, especially transparent blister packs, may exhibit scratches. If the marks are too long or too large, the blister pack is deemed defective and cannot be used for premium packaging.

　　Pull wire: Thick-sheet thermoforming Some undesirable linear protrusions that appear during molding—though absent in the mold itself—must be addressed by revising the mold (by reducing its height and increasing its roundness) and adding an additional press die, which we refer to as the upper die. If the pull‑out is excessive, the part is considered defective and cannot be used for high‑end thermoformed packaging. However, in the context of component‑handling pallets, as long as the pull‑outs are neatly aligned and do not impair functionality, the product should be deemed acceptable. This phenomenon is also referred to as “pulling” or “cramping,” among other terms.

　　Water ripples: During the production of thick-sheet thermoformed sheets, differences in the thermoforming material and processing techniques can result in water ripple patterns on the finished surface. This is especially true for transparent thick-sheet thermoformed products; if the ripples are excessive, the product is deemed defective. Generally, the thicker the sheet, the more pronounced the water ripples. High‑quality PET materials rarely exhibit water ripples, whereas most thick‑sheet PVC thermoformed sheets do.

　　Crystal Point: Thick-sheet thermoforming During the manufacturing process of sheets—particularly in the production of transparent thick-sheet thermoformed sheets—tiny airborne dust particles can settle on the heated plastic material, resulting in transparent defects. If such defects exceed a specified size, the product is classified as nonconforming.