A mold core-pulling structure with high concentricity conical dimming gear

Abstract

The invention provides a die core-pulling structure with a high-coaxiality conical dimming gear. The die core-pulling structure comprises a movable die, a fixed die and core-pulling components, wherein a movable die embedding block is fixed on the movable die; a fixed die embedding block is fixed on the fixed die; a first cavity for forming the upper part of the conical dimming gear is formed in the fixed die embedding block; a pouring gate is connected with the upper side of the first cavity; each core-pulling component comprises a large sliding block, a movable embedding block and an inclined guide column; the large sliding block is arranged on the movable die; the movable embedding block is arranged on the large sliding block; a first inclined guide column hole is formed in the large sliding block; a second inclined guide column hole is formed in the movable embedding block; one end of the inclined guide column is connected with an inclined guide column pressing block fixed on the fixed block, and the other end of the inclined guide column penetrates through the first inclined guide column hole and the second inclined guide column hole; the two groups of core-pulling components are symmetrically arranged. The pouring gate of the die core-pulling structure is formed above the cavity and can realize pouring from top to bottom, so that the obtained conical dimming gear molded piece is high in coaxiality, and the quality defect of a product caused by lateral pouring in the prior art can be avoided.

Description

technical field [0001] The invention belongs to the technical field of moulds, and in particular relates to a mold core-pulling structure with a conical dimming gear with high coaxiality. Background technique [0002] With the continuous development of my country's automobile industry, the requirements for automobile quality and function are getting higher and higher. Now most of the car lights have automatic dimming function, which brings great convenience to driving at night; when driving at night, the car lights will follow the change of the driving direction. The dimming function of car lights is inseparable from the core accessories related to it: the conical dimming gear. [0003] Since the conical dimming gear is a core accessory of the smart car light, the quality requirements for the product are very high. At present, the industry usually uses fiber-reinforced PA66 raw materials to inject conical dimming gears. The mechanical properties and shrinkage of glass fibe...

AI Technical Summary

Problems solved by technology

At present, the industry usually uses fiber-reinforced PA66 raw materials to inject conical dimming gears. The mechanical properties and shrinkage of glass fiber-reinforced PA66 are very good. PA66 exhibits large anisotropy in terms of mechanical properties and shrinkage, however, due to the structural characteristics of the conical dimming gear (such as figure 1 As shown), the existing mold technology can only use side gates for injection molding, which will inevitably lead to uneven internal mechanical properties of injection molded products, which greatly affects the service strength of the product

The product strength is low, it is difficult to meet the requirements of use, resulting in the failure of the steering of the car lights, resulting in hidden dangers to driving safety

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