Injection molding device

Abstract

The invention discloses an injection molding device. The device adopts a confrontational horizontal turning double-color injection molding machine, and a confrontational mold, wherein pouring gates of the mold are arranged at two ends of the mold, and on the same axis. A temperature control system of the mold comprises a mold temperature controller, a water cooling machine and an external cooling water tower which are connected in a combination manner. According to the injection molding device, the qualification rate, the production efficiency and the production energy consumption of the product, the mold cost and the like are greatly changed or improved.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to an injection molding device. Background technique [0002] Double-material injection molding refers to the combination of two materials of different colors and different materials in different parts of a product and at their joints to form an integral product. For example, if the middle part of a product is made of hard material and the edge part is made of soft material, it is necessary to inject two plastic materials with different hardness into these two different parts. [0003] For the production of such multi-color or multi-material plastic products, two methods are generally used at present: one is to adopt the two-time molding method, which requires two sets of molds. After two injection moldings, the product can be formed into a complete The product. This method not only has low efficiency, but also has poor butt joint accuracy of joint parts of different mat...

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Problems solved by technology

[0004] The second method has the following problems: (1) The turntables of the traditional two-color injection molding machine are all vertical rotation. Due to the heavy weight of the mold, repeated rotations in the vertical rotation will cause the mold to close due to the compression and deformation of the rotation axis. The accuracy is reduced, which leads to product injection defects and mold damage; (2) The soft and hard plastic gates of the mold used are arranged at right angles. During the process, the mold is easy to wear, the actual service life is shortened by about 20%, and it is easy to cause the fixed mold to shift, resulting in lower mold clamping accuracy and resulting in product quality problems; (3) due to defects such as vertical gate settings, mold clamping accuracy lower, which in turn leads to defects such as difficulty in sealing soft and hard rubber, protruding flashes and burrs at the joint of soft and hard rubber, and reduced dimensional stability; Inside, the internal space is fixed, but more parts need to be accommodated, which will inevitably lead to complex internal structure, which is not conducive to the stability of the entire heating system; (5) The soft and hard rubber feeding of the traditional mold adopts the gate type, because the gate has been repeated for a long time Opening and closing, it is easy to cause serious wear of the gate, the reduction of mold precision leads to poor product stability, and even the mold is damaged and cannot be produced.

(6) The current mold temperature control system uses a single chiller or circulating cooling water when cooling down, and connects a single mold temperature machine when heating up. The production status is greatly affected by the outside, resulting in a low product qualification rate; (7) The turntable is affected by The influence of rotation speed leads to cycle growth, and the production of one product per cycle has low efficiency and increased energy consumption; (8) Due to the compression and deformation of the rotating shaft, it needs to be repaired and replaced, and the scrap rate gradually increases with the use time. Reduced to the cost caused by final scrapping, etc., which has a greater impact on benefits

[0005] At present, the mold temperature control system uses the mold temperature machine or the water chiller alone, and there are the following problems: ① The mold temperature requirements are different when different products are produced, and there is a situation of switching between the water chiller and the mold temperature machine, which is time-consuming and laborious, and it is not easy to manage; ② The mold temperature machine It is to increase the mold temperature and keep it within a certain range. The temperature difference between the outlet water temperature and the inlet water temperature on the mold cannot exceed 5°C. The high temperature water flowing back from the mold needs to be cooled. When the water flow rate of the mold temperature machine reaches the maximum, the cooling The temperature of the water determines whether the cooling effect can meet the requirements. The water temperature of our external cooling water tower is consistent with the environment. When the external environment temperature is very high, the cooling water may not achieve the cooling effect. The temperature difference between the water temperature is too large, which makes the product quality control difficult

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