What is the difference between injection molds and blow molds? How much do you know?

Mold products of two processing technology injection molding and blow molding, they have their own characteristics, simply put, blow molding mold using the "injection + blow" way, injection molding mold using the "injection + pressure" way, injection molding is a solid core, blow molding is an empty core, injection molding mold has The mold for injection molding has a sprue section, and the surface of the mold for blow molding and the air blowing port are not uniform.

I. Injection Molding

Injection molding is the injection molding treatment of the material, that is, the plastic material is melted and then injected into the mold cavity. After the plastic enters the mold, it cools and then is processed into the desired shape, and the shape formed is the final appearance of the finished product, and there is no need for other processing. In addition, the injection molding process can control the details very well. In the injection molding process, projections, ribs, threads and other parts can be formed in one step.

Second, blow molding mold

Blow molding, a relatively fast developing plastic processing method, is also known as hollow blow molding. The processing principle is that thermoplastic resin or tubular plastic blanks obtained by injection molding are placed into the mold, and then compressed air is injected into the mold after the mold is closed to inflate the plastic blanks and bring them close to the inner wall of the mold, and then the desired hollow products are obtained by cooling and demolding.

It is worth mentioning that, very similar to blow molding of hollow products, the manufacturing process of blown film is produced in principle without the use of molds, which is completely different from processing injection molding. According to the blank production method, blow molding can be divided into extrusion blow molding and injection blow molding, the new direction of development is multilayer blow molding and stretch blow molding.

Third, blow molding, injection molding the difference between the two

In fact, injection molding and blow molding molds are the main difference in the form of product performance. Injection molding process manufacturing products are usually thicker, relatively simple to manufacture, and the requirements for raw materials are relatively low. Blow molding process is different, the product is thin and transparent, because of this, there are certain requirements for the toughness and tensile properties of raw materials, and the processing requirements of blow molding molds are relatively high.

Injection molds and blow molds are widely used in daily life, and both have their own advantages and characteristics, the development prospects are good.

The above is the introduction of the difference between injection molds and blow molds that Xiaoqi shared today, so do you know what the main difference between the two is? That's right, it's the expression of the product.

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