The difference between rolling, blow molding and injection molding is mainly divided into two points: first, the difference in process; Second, the difference in appearance.

The difference in process:

1, injection molding process: The injection molding machine is completed, the input cost is relatively high, the mold price is relatively expensive, the product price is very cheap, the market is more transparent, mainly suitable for the production of relatively small products, the monthly output is very large, the mold and the product belong to the precision is very high, and the general sheet is used in various fields. Injection molding is injection + pressure, injection molding must have a gate section.

2, blow molding process: blow molding mold is relatively simple, and the product is blown out of shape with gas. The mold price is moderate, mainly suitable for making hollow class, packaging class and other special products, the monthly output is only thousands of sets, the field of use is limited. Blow molding is injection + blowing, and the blow molding must have the head left by the blowpipe.

3. Rotoplastic process: The rotoplastic product is relatively large, the plastic particles are heated inside the mold, and then the mold is rolled constantly to make the plastic and the inner wall of the mold fit and form. The mold price is cheap, the product price is expensive, the main sum of the production of hollow class, packaging class and super large products, the size shrinkage ratio is relatively large, the constant is very low and so on. Rotary-molding is extrusion + pressing, rotary-molding without cutting must have rough edges. Of course, the detailed difference should be based on product characteristics and requirements.