1. Mold production and processing: According to the requirements or sample specifications, the first step is to make a vacuum plastic mold. Generally, gypsum is used to make vacuum plastic packaging molds, but wood and metal carved products are also used as molds. After the gypsum mold is made, it is allowed to dry naturally or dry completely. Then, according to the specific situation of the product surface, 1-2mm drill holes are used to drill many small holes in the low and concave areas that do not affect the product packaging shape, If it is a product such as a packaging box, some small holes need to be drilled around it to allow air to be extracted during vacuum molding production. After drilling the holes in the mold, the gypsum mold needs to be hardened by soaking it in concentrated alum saturated solution and drying it.
2. After the mold is completely dried, install the mold onto the upper iron plate of the vacuum chamber. Then, according to the size of the mold, load the plastic sheets into suitable specifications and sizes. Then, place this sheet into a heated wooden cabinet to completely fix it. Then, place the wooden cabinet and plastic sheets on a constant temperature furnace for softening treatment.
3. Place the softened plastic sheets together with the wooden cabinet in the vacuum chamber, activate the suction switch, and suck out the air in the vacuum chamber. After the plastic sheets cool down, a concave packaging or process mold that is the same as the mold is obtained.
4. Blister packaging and sorting; The finished product is produced by trimming and organizing the edges, and can be sold after packaging.