Introduction To The Molding Process Of Beverage Bottles

In daily life, beverage bottles are widely used, mainly used to hold various beverages. The molding process of beverage bottles is to use synthetic resin polymers to process various plastic products. According to different places of use, beverage bottles will also vary in appearance, color, and material. Usually, there are six main processes in the molding process of beverage bottles: compression molding (compression molding) - extrusion molding (extrusion molding) - injection molding (injection molding) - blow molding (hollow molding) - calendering - foam molding Etc., for each different process, the production process will also be different.

1. Compression molding: also known as compression molding or compression molding, compression molding is mainly used for the molding of thermosetting plastics such as phenolic resin, urea-formaldehyde resin, and unsaturated polyester resin.

2. Extrusion: Also known as extrusion molding, it is a method of using an extruder (extruder) to continuously pass the heated resin through a mold to extrude products of the desired shape. Extrusion is also sometimes used in the molding of thermosets and can be used in the molding of foamed plastics. The advantage of extrusion is that it can extrude products of various shapes, with high production efficiency, and can be automated and continuous production; the disadvantage is that thermosetting plastics cannot be widely processed by this method, and the product size is prone to deviation.

3, injection molding: also known as injection molding. Injection molding is a method of using an injection molding machine (or injection machine) to inject thermoplastic melt into a mold under high pressure, cooling and solidifying to obtain a product. Injection molding can also be used for the molding of thermosets and foams. The advantages of injection molding are that the production speed is fast, the efficiency is high, the operation can be automated, and it can form parts with complex shapes, which is especially suitable for mass production. The disadvantage is that the equipment and mold costs are high, and the injection molding machine is difficult to clean.

4. Blow molding: also known as hollow blow molding or hollow molding. Blow molding is a method of inflating a hot resin parison closed in a mold into a hollow product by means of the pressure of compressed air. Blow molding includes two methods of blowing film and blowing hollow products. Blow molding can be used to produce film products, various bottles, barrels, pot containers and children's toys.

5. Calendering: It is to process the resin and various additives into a film or sheet through the gap of two or more calender rolls with opposite directions after the desired treatment (kneading, filtration, etc.), and then from the calender roll. A molding method in which the top is peeled off, and then cooled and shaped. Calendering is a molding method mainly used for polyvinyl chloride resin, which can manufacture films, sheets, boards, artificial leather, floor tiles and other products.

6. Foaming molding: The process of making plastics have a microcellular structure by adding appropriate foaming agents to different foaming materials (PVC, PE and PS, etc.). Almost all thermosets and thermoplastics can be made into foams. According to the cell structure, it is divided into open-cell foam (most of the pores are connected to each other) and closed-cell foam (most of the pores are separated from each other). and mechanical foaming).