Environmentally friendly paper trays are currently a new type of packaging favored by many industries. The current paper tray production processes include vacuum forming and grouting.
1. Vacuum suction molding method: It is a method of popularizing paper-plastic products. According to its different structure, there are three ways: drum type, flip type, reciprocating lift type.
Rotary drum type: continuous rotating production, high production efficiency, large investment, high mold processing accuracy, high technical requirements for equipment processing accuracy, one set of concave molds with eight sets of punches. Need to use the CNC center to process the mold, the processing cycle is long, and the investment is large.
Flip type: lower production efficiency than drum type, suitable for medium batch and non-standard production of industrial molding, but because it is a set of concave molds with two sets of punches, the mold needs to be processed by a CNC center, which requires a large investment and a long cycle.
Reciprocating lifting type: The production efficiency is the same as the flipping type, which is a common production method at present. Because the equipment only needs a set of concave molds to match the punches, and does not need CNC center processing, it is suitable for non-standard, small batch, and fast cycle industrial packaging products.
2. Grouting molding method: The injection molding method is to calculate the required amount of slurry according to different pulp packaging products, and then quantitatively inject it into the molding cavity for adsorption molding. This kind of molding method has little adaptation to changes. The finalized standard products are commonly used in tableware molding products. Because the finalizing calculation is not easy to grasp, this molding method is not used in non-standard paper-plastic packaging.
