Fixed die core-pulling mechanism capable of self-locking and backstopping

Abstract

The invention discloses a fixed die core-pulling mechanism capable of self-locking and backstopping, which comprises a wedge-shaped sliding block (1), an oblique ejection rod (2), an oblique core-pulling block (3), an oil cylinder (4) and a support seat (5). By using the technical scheme that the oblique core-pulling block is connected with the wedge-shaped sliding block through the oblique ejection rod by using the frictional self-locking principle, and the oil cylinder is arranged obliquely so that the stressed included angle between the wedge-shaped sliding block and the oblique ejection rod is smaller than a frictional self-locking angle of the material, the mechanism overcomes the defects of unreliable work of a die, easy fault occurrence and instable product quality because the oblique core-pulling block retreats. In the fixed die core-pulling mechanism capable of self-locking and backstopping, the retreat of the oblique core-pulling block is prevented by the self-locking and backstopping effect of the wedge-shaped sliding block, and core pulling and resetting of the oblique core-pulling block with great retraction force are driven by the small-specification oil cylinder so that the injection molding die fulfills the purposes of reducing cost, obtaining reliable work, eliminating fault hidden dangers, stabilizing product quality and ensuring product quality consistency.

Description

technical field [0001] The present invention relates to a core-pulling mechanism of an injection mold, and specifically refers to a device used in a fixed mold of an injection mold to extract an oblique core-pulling block arranged at a cavity of a fixed mold from an injection molded product before the mold is opened. Fixed mold core-pulling mechanism with self-locking and non-retraction. Background technique [0002] Due to functional requirements, the internal structure of some injection molded products has structural features that cannot be demolded from the fixed mold cavity along the mold opening direction, so it is necessary to set a core-pulling mechanism in the fixed mold of the injection mold, for example, a wall-mounted air conditioner base There is a sink on the back of the mold, and it is a concave structure along the mold opening direction, so it is necessary to set a core-pulling mechanism in the fixed mold of the mold. [0003] prior art, see Figure 4 , set a...

AI Technical Summary

Problems solved by technology

[0003] prior art, see Figure 4 , set an oblique long channel 03 on the back of the fixed formwork for oblique sliding core-pulling of the oblique core-pulling block. In and out movement; when the mold is closed and injected, the thrust of the oil cylinder prevents the retreat of the oblique core block due to the strong injection force; because the hydraulic oil has the characteristic of being compressed under pressure, the oblique core block works in the mold There will be a small amount of backward movement during the process, and the result is a step or flash on the surface of the injection molded product, which makes it difficult to control the quality of the product and the quality is difficult to be stable and consistent.

In addition, due to the need to set up and down the obliquely long through-slot 03 on the fixed formwork for oblique sliding core-pulling of the oblique core-pulling block, the overall strength of the fixed formwork is reduced, and the processing of the obliquely long through-slot 03 is difficult, and the accuracy is difficult to guarantee; these Comprehensive factors lead to unreliable mold work, prone to failures such as oblique core block jamming or fixed template cracking

Therefore, there are problems and deficiencies in the prior art, such as unreliable mold work, prone to failure, and unstable product quality.

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