1: Mold making and processing: According to the requirements or sample specifications, firstly, the plastic mold is made. Under normal conditions, the plastic packaging mold is made by gypsum, but the wood carving and metal carving products are also used as the mold, and the plaster mold is well made. After that, let it dry naturally or completely, and then use the 1-2 mm drill to drill many small holes in the low concave of the product packaging without affecting the surface of the product. If it is a box or the like It is also necessary to drill some small holes in the four periphery so that the air can be extracted when the plastic is produced. After the hole is drilled, the plaster mold must be hardened. The hardening method is to soak with the concentrated liquid of the concentrated alum. Dry it out.
2: After the mold is completely dried, the mold is placed on the upper iron plate of the vacuum chamber, and then the plastic sheet is loaded into a suitable size according to the size of the mold, and then the sheet is placed in a heating wooden cabinet to be completely fixed. Then, the wooden cabinet and the plastic sheet are placed on a constant temperature furnace for softening treatment.
3: Put the softened plastic sheet together with the wooden cabinet, place it in the vacuum chamber, start the suction switch, and vacuum the vacuum chamber air. After the plastic sheet is cooled, the same concave package or process mold as the mold is obtained.
4: Blister packaging and finishing; the finished product is trimmed and finished as a finished product, which can be sold after being packaged.