Injection mold for disc arc-shaped valve cover

Abstract

The invention provides an injection mold of a disc arc-shaped hook face valve deck. A boss with a hole is arranged on the disc arc-shaped hook face of the valve deck. The injection mold comprises an upper mold assembly and a lower mold assembly. The upper mold assembly comprises an upper mold block, a limiting rod and a sliding block. The upper mold block comprises a locking block chute. A vertically-sliding locking block is arranged in the locking block chute. A flange is arranged at the upper end of the limiting rod, a stepped hole is formed in the upper end of the locking block, and the lower end of the limiting rod penetrates the stepped hole to be connected with the upper mold block. The lower end of the locking block is in a shifting fork shape. Sliding block chutes are formed in the two side walls of the shifting fork, wherein certain slope is formed between the sliding block chutes and the sliding direction of the locking block. The sliding block chutes are matched with tail flanges of the sliding block to drive the sliding block to linearly move in a sliding block guide groove of the upper mold block. A head flange is arranged on the head of the sliding block. A molding face matched with the disc arc-shaped hook face of the valve deck is arranged at the lower end of the upper mold block. A molding face matched with the inwards-concave hook face of the valve deck is arranged at the upper end of the lower mold block of the lower mold assembly. The disc arc-shaped hook face valve deck is high in production efficiency and molding quality.

Description

technical field [0001] The invention relates to the technical field of injection molds, in particular to an injection mold for a disc arc-shaped valve cover. Background technique [0002] A variety of different types of valves are used in automobile supporting parts. The fluid flow is controlled by changing the throttle section, throttle length, etc., or the flow resistance through the valve is changed through the gap between the valve core and the valve seat to adjust the flow. the goal of. Therefore, the throttle valve is one of the important components in the supporting parts of the automobile, and its product performance will directly affect the performance of the automobile. [0003] Throttle valve includes valve body, valve core and bonnet, etc. Ensuring the shape and position tolerance of each part of the throttle valve and ensuring the manufacturing accuracy of each part of the throttle valve are the basis for realizing the quality of throttle valve products. It is...

AI Technical Summary

Problems solved by technology

The bonnet product of a kind of automobile throttle valve of the prior art is injection molding with nylon reinforced glass fiber (PA66GF35) material, and this bonnet is a disc arc curved surface bonnet, such as figure 1 As shown, the disc arc-shaped curved surface 1a of the disc arc-shaped curved surface valve cover 1 is provided with a boss 1b with a hole 1c, and the axial direction of the hole 1c on the boss 1b is consistent with the upper module of its injection mold. The opening and closing direction of the lower module is close to perpendicular, which has caused great technical difficulties for the development of a pair of high-quality, mass-produced injection molding molds

Injection molding in the prior art often adopts a combined and spliced ​​structure. Such a structure will cause burrs on the movable inserts. Repairing the burrs on the inserts on the arc-shaped surface 1a of the disc is a difficult, time-consuming and labor-intensive task.

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