Mould requiring no thimble to participate in molding process

Abstract

The invention provides a mould requiring no thimble to participate in a molding process and relates to an injection mould, which comprises a moveable mould and a fixed mould, wherein a front mould core is arranged on the moveable mould; sliding block binding blocks are symmetrically arranged on the moveable mould; a product cavity is arranged on the fixed mould; thimbles are symmetrically arranged at the left and right sides of the product cavity; sliding block inserts are symmetrically arranged at the upper ends of the thimbles at the left and right sides and of the upper surfaces at the left and right sides of a back mould core, so as to keep the upper ends of the thimbles lower than the lower surfaces of the sliding block inserts; the sliding block inserts are fixedly inserted in sliding block bases; the sliding block bases can slide left and right; the sliding block base at the left side is moveably matched with the sliding block binding block at the left side of the moveable mould; the sliding block base at the right side is moveably matched with the sliding block binding block at the right side of the moveable mould; and the upper ends of the thimbles are shielded or exposed. The mould requiring no thimble to participate in a molding process has the advantages that the thimbles are free from participating in molding and only have the function of ejecting the product out of the mould after the mould is opened, so the product formed in the manner of injection molding is free from deckle edge, the quality of product is increased, the investment is greatly reduced, the production efficiency is increased and the labor cost is lowered.

Description

technical field [0001] The invention relates to an injection mold, especially a mold in which a thimble does not participate in molding, and is suitable for injection molding plastic frames and the like. Background technique [0002] Molding and demoulding technology in injection molding has always been concerned by the industry. In the prior art, during injection molding, it is necessary to use ejector pins to eject the product to complete mold release. Such a design generally has a thimble at the thinner part of the product, and the thimble participates in the molding. This "thimble participates in molding" mold and injection molding process has the following shortcomings: [0003] First, the thimble will wear out after a long production time, which will easily cause burrs on the injection molded product, requiring manpower to repair it in the subsequent process. [0004] Second, due to repeated repairs, those fixed inserts will also have peaks. Because there are many p...

AI Technical Summary

Problems solved by technology

[0005] Third, affect product quality

[0006] Fourth, trimming the burrs and covering the peaks consumes a lot of labor, which not only makes the production efficiency very low, but also makes the labor cost relatively large.

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