During the production of plastic products by injection mould, it is often encountered that after the mould has been used for a long time, the deformation of the mould will cause the products to have flash, burr and other defects, which will lead to disqualification. Generally, people take the way of overhaul or scrap to deal with similar problems.

However, for some products with low size requirements, this solution is not worth the loss. Now, a simple and easy way to solve the common deformation of the plastic mold is proposed. 1、 The influence of poor exhaust and expansion deformation of the template on the products Before filling the plastic melt, the mold cavity is filled with air. During the injection process, the plastic melt will also produce a lot of gas. During mold filling, all of these gases will be driven out of the mold cavity, and their exhaust ways are roughly as follows:

Clearance between die inserts and push rod; Specially opened exhaust holes and grooves. When the mold is in poor exhaust, as the plastic melt is continuously injected into the mold cavity, the gas in the cavity will be gradually driven away and compressed. The greater the degree of compression, the stronger the role of blocking the progress of the melt.