Do you understand the thermoforming process of blister packaging?
First, a mold must be made. According to the requirements or sample specifications, a thermoforming mold is made. Under normal conditions, plaster is used to make the thermoforming packaging mold. After the plaster mold is made, it is allowed to dry naturally or baked, and then, according to the specific situation of the concave and convex surface of the product, many small holes are drilled in the low concave areas with a 1-2 mm drill bit without affecting the appearance of the product packaging. If it is a packaging box product, some small holes must also be drilled on the four sides to facilitate the extraction of air during the production of the thermoforming packaging. After the mold is drilled, the plaster mold must be hardened. The hardening method is to soak it in a saturated solution of alum and then dry it.
After the mold is completely dry, place the mold on the upper iron plate of the vacuum chamber. Then, according to the size of the mold, cut the plastic sheet into a suitable size, and then place the sheet in a heated wooden cabinet to fix it completely. Then, place the wooden cabinet together with the plastic sheet on a constant temperature furnace for softening treatment.
Place the softened plastic sheet and the wooden cabinet in the vacuum chamber, turn on the suction switch to evacuate the air in the vacuum chamber, and after the plastic sheet cools, the same concave packaging or process mold as the mold is obtained. Thermoforming packaging finishing; the produced products are trimmed and finished, and then packaged for sale.
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