Demoulding device for barb injection molded part

Abstract

The invention relates to a demoulding device for a barb injection-molded part. The demoulding device comprises a moving mould plate and a mould core, wherein a demoulding ejector rod is inserted into the moving mould plate and the mould core; sleeves are arranged between the demoulding ejector rod and the moving mould plate, and between the demoulding ejector rod and the mould core and fixedly connected with the moving mould plate; the sleeves are also provided with a spiral chute correspondingly matched with convex knobs on the two sides of the ejector rod, so that the moving mould plate forces an outward turning end embedded in a hook-shaped body of a product on the top of the demoulding ejector rod to be rotatably demoulded along with the demoulding ejector rod through the spiral chuteand the convex knobs; and the lower end of the demoulding ejector rod is rotatably connected with an ejector retainer plate. The demoulding ejector rod of the demoulding device rotatably moves upwards with small turning moment and stress on the chute is small, so that the demoulding device has the advantages of reducing friction force, reducing damage to the core structure and the mould core, greatly prolonging the service life of the barb molding structure and a mould and ensuring that the molding structure does not have the defects.

Description

technical field [0001] The invention relates to the field of plastic molds, in particular to a demoulding device for barb injection molded parts. Background technique [0002] In the molding mold of plastic products, for the barbs and inner grooves of the products, the lateral parting is realized by means of flat sliding oblique pins. Motorized lateral parting and core pulling use the mold opening force of the injection machine to change the direction of movement through the transmission mechanism to pull out the lateral movable core. Common motorized core-pulling can be divided into various core-pulling forms such as inclined pins, springs, bent pins, inclined guide grooves, inclined sliders, wedges, and gear bars according to the structural form. Take the oblique pin core-pulling as an example, the oblique pin moves obliquely up and down by pushing and pulling the ejector plate, and slides with the groove of the mold core by plane friction. Due to the high-precision coop...

AI Technical Summary

Problems solved by technology

Due to the high-precision cooperation between the oblique pin and the mold core groove, great friction will be generated when the up and down motion is converted into oblique motion. At the same time, it is easy to bite and get stuck after being heated and expanded, so that the oblique pin is often broken and the core is pulled. The structure of the organization is more complex

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