Plastic bottle is a kind of container that is often used in our daily life. Its production process can be divided into the following steps:
1. Raw material preparation: The raw materials required to produce plastic bottles are mainly polyethylene terephthalate (PET) or high-density polyethylene (HDPE). These raw materials are usually supplied in the form of pellets.
2. Heating of plastic pellets: Put the plastic pellets into a high-temperature oven for heating until they reach a molten state. The heating temperature is usually between 260°C and 290°C.
3. Extrusion molding: The molten plastic is extruded into strips through an extruder, and then cooled and solidified to form the basic shape of the plastic product.
4. Bottle manufacturing: The extruded plastic strips are passed through a series of blow molds to gradually form the shape of the bottle. During this process, parameters such as temperature, pressure and stretching speed need to be controlled to ensure the quality and stability of the bottle.
5. Bottleneck manufacturing: The bottleneck part is made on the bottle body, usually by injection molding. This process requires the use of specialized injection molds to inject molten plastic into the neck of the bottle, which is then cooled and solidified.
6. Bottle cap manufacturing: According to different needs, different bottle cap types can be selected, such as screw caps, stopper caps, etc. The process of making bottle caps also requires the use of injection molding technology.
7. Labeling and printing: Labeling or printing on bottles can increase the recognition and aesthetics of the product. This process can use techniques such as screen printing and thermal transfer printing.
In short, the production process of plastic bottles is a complex project that requires the coordination of multiple links to complete. At the same time, in order to ensure product quality and environmental protection, the production process also needs to strictly control parameters such as temperature, pressure, and speed in each link, and use environmentally friendly materials and technologies.
