Cooling and material drying apparatus for injection mold

Abstract

The present invention discloses a cooling and material drying apparatus for an injection mold. The apparatus comprises a cooling system and a material drying system. The cooling system comprises a compressor (1), a first heat exchanger (2), a throttling part (3) and a connection pipeline. The injection mold (5) is provided with a cooling circuit (6), wherein the cooling circuit (6) is provided with two inlet and outlet ports. The material drying system comprises a hopper (9), an air duct (10) and a fan (11). The first heat exchanger (2), the hopper (9) and the fan (11) form a series connection through the air duct (10). With the apparatus provided by the present invention, the mold can be cooled uniformly, such that the defect due to rapid shrinkage of the local of the product can not be caused so as to improve the product quality; the cooling system and the material drying system are integrated so as to improve the energy utilization rate.

Description

technical field [0001] The invention relates to the field of injection molds, in particular to a cooling and material drying device for injection molds. Background technique [0002] In injection molding, the temperature of the mold directly affects the quality and production efficiency of the product. Due to the different performance and molding process requirements of various plastics, the requirements for mold temperature are also different. Generally, the temperature of the plastic injected into the mold is about 200-300°C. After the melt solidifies into a product, the product is demoulded when the mold temperature is low. The reduction of the mold temperature mainly depends on the cooling medium in the mold. The heat is taken away, and the cooling time of the injection mold mainly depends on the cooling effect of the cooling system. According to statistics, the cooling time of the mold accounts for about 2 / 3 of the entire injection cycle, so shortening the cooling tim...

AI Technical Summary

Problems solved by technology

[0004] The prior art cooling and material drying device mainly has the following disadvantages: (1), mold cooling and material drying are two sets of independent systems, one is a refrigeration system, and the other is a heating system, and the two systems are not combined and optimized; ( 2) After the cooling system has been used for a long time, the solid deposits in the water are easy to scale in the cooling circuit of the mold, which reduces the heat transfer efficiency and causes heat loss; (3) When cooling the mold, the temperature of the water should be raised, There is a certain temperature difference between the inlet and outlet of the mold, which is easy to cause uneven temperature control and lead to a decline in product quality; (4), the cooling water absorbs a large amount of heat from the mold and is not fully used; (5), when the material is dried, if the open drying method is used , the humid air with high temperature is directly discharged, the energy is not fully utilized, and the closed cycle drying without dehumidification function is adopted, the circulating hot air always has high humidity, the humidity difference between the inlet and outlet of the hopper is not obvious, and the drying effect is also low not ideal

Images