What are the ways to improve the quality of blow molded products?

What are the ways to improve the quality of blow molded products? The importance of blow molding equipment to industrial production is self-evident. A large number of plastic products are made by blow molding. The more common blow molding methods are extrusion molding. The problem of poor product quality inevitably occurs during the production process. Let’s learn together how to improve the quality of blow molding products.

1. Inflation pressure

The inflation pressure can make the semi-molten tube inflated and close to the cavity wall to form the desired shape, and it can also cool the blow-molded product. Generally, a large volume of inflation pressure that is too large or too small is not conducive to production, and the shape and pattern of the appropriate pressure product will be clearer.

2. Inflation speed

In order to shorten the blowing time and obtain blow-molded products quickly, a large amount of air should be injected in a short time to ensure that the mold cavity can expand evenly and quickly, and to shorten the cooling time in the mold cavity.

MEPER blow molding machine

3. Blow mold temperature

The mold temperature has a great influence on the appearance of blow molded products. Usually, the temperature of the mold should be cooled as uniformly as possible. The temperature of the mold is related to the type of plastic, the thickness and size of the product. for different kinds of plastics

If the mold temperature is too high, the cooling time is prolonged, the production cycle is increased, and the productivity is decreased. At this time, if the cooling is not enough, the product will be demolded and deformed, the shrinkage rate will increase, and the surface gloss will deteriorate. Generally, for plastics with more rigid molecular chains, the mold temperature should be higher; for plastics with more flexible molecular chains, the mold temperature should be lower.

The above are the methods to improve the quality of blow molding products. I hope the MEPER article will be helpful to everyone.