In plastic mold manufacturing, temperature control of the mold is very important. If the cooling system design is not reasonable, internal stress will be generated for small plastic parts, and deformation and even stress cracking will be caused for thin-walled large plastic parts. Moreover, insufficient cooling can lead to prolonged injection molding cycles, thereby reducing production efficiency. Therefore, the importance of plastic mold water transportation design is self-evident.

In order to provide plastic molds with the mold temperature required for plastic molding, improve the fluidity of plastic materials, facilitate the filling of mold cavities, and ensure the quality of plastic products, it is necessary to effectively remove heat in order to quickly cool and solidify the molten resin filled in the mold cavity after filling. The design of plastic mold water transportation in this way aims to form a very short molding cycle time.

The purpose of cooling plastic molds:

1) Balanced cooling to improve the quality of plastic products;

2) Effective cooling to shorten the injection molding cycle;

3) Institutional cooling ensures the normal operation of plastic molds.

What are the basic characteristics of injection mold manufacturing?

(1) High machining accuracy; Injection molds are generally made by assembling multiple parts, and the assembly of mold parts requires high machining accuracy. The dimensional accuracy requirements of precision injection molds even reach μ M-level.

(2) The shape is relatively complex; Some products, such as car covers, parts, toys, and household appliances, are formed by the combination of many curved surfaces.

(3) Due to the difference in demand for plastic parts, not every mold needs to be produced in large quantities. Therefore, a small batch only requires opening a set of test molds to meet the requirements.

(4) There are many manufacturing processes for injection molds; Complex machining processes such as milling, drilling, reaming, and tapping are required in mold processing.

(5) Repetitive production; When an injection mold reaches its service life, it will be scrapped. A new mold needs to be replaced to meet production needs. Therefore, molds are often produced repeatedly.

(6) Processing according to the sample; Sometimes in the manufacturing of injection molds, there may be situations where there are no product drawings, and it is necessary to carry out contour machining based on the actual product. This requires high imitation accuracy and no deformation.

(7) The main processing material for injection molds with excellent materials and high hardness is generally high-quality alloy steel, especially for injection molds with good service life requirements, which are often made of martensitic steel such as Crl2 and CrWMn. This type of steel has strict requirements from rough forging, processing to heat treatment.