Secondary demolding mechanism for plastic bottle cover die

Abstract

The invention discloses a secondary demolding mechanism for a plastic bottle cover die. The secondary demolding mechanism comprises an upper template and a lower template, wherein the upper template is connected with upper cushion blocks, a fixed die fixing plate and fixed templates; bottle cover cavity embedding blocks are arranged in the fixed templates; lower cushion blocks, a movable die fixing plate and movable templates are arranged on the lower template; an upper roof and a lower roof are arranged between the lower cushion blocks; mandrils are arranged on the upper roof; bottle cover core embedding blocks are arranged in the movable templates; material push plates are arranged between the movable templates and the fixed templates; antitheft tooth-shaped cavity embedding blocks are arranged in the material push plates; antitheft tooth-shaped core embedding blocks are arranged outside the bottle cover core embedding blocks; the antitheft tooth-shaped core embedding blocks are matched with the antitheft tooth-shaped cavity embedding blocks; molded bottle covers and antitheft teeth are arranged between the bottle cover core embedding blocks and the bottle cover cavity embedding blocks; the mandrils are in contact with the inner bottoms of the bottle covers; check rods are connected below the movable templates; jacking columns are connected below the material push plates; the lower roof is connected below the jacking columns; penetrating holes are formed in the upper roof; in a jacking process, the check rods penetrate through the penetrating holes and are in contact with the lower roof.

Description

technical field [0001] The invention relates to a secondary demoulding mechanism for a plastic bottle cap mold, which belongs to the field of plastic molds. Background technique [0002] At present, there are mainly two ways to produce plastic bottle caps. One is to use a capping machine to press, but only some relatively neat bottle caps can be processed. For bottle caps with anti-theft teeth (threads), pressing The capping machine cannot process it. Therefore, the existing technology can only use injection molds to process bottle caps with anti-theft teeth. The main structure of the mold is for the demoulding of the anti-theft teeth. First, the oil cylinder drives the anti-theft tooth slider to pull the core, and then the main body of the bottle cap is ejected out of the mold by the ejector mechanism. The internal structure is very complicated, the demoulding action is many, unstable, and the processing cost is high. On the other hand, the front and rear, left and right m...

AI Technical Summary

Problems solved by technology

[0002] At present, there are mainly two ways to produce plastic bottle caps. One is to use a capping machine to press, but only some relatively neat bottle caps can be processed. For bottle caps with anti-theft teeth (threads), pressing The capping machine cannot process it. Therefore, the existing technology can only use injection molds to process bottle caps with anti-theft teeth. The main structure of the mold is for the demoulding of the anti-theft teeth. First, the oil cylinder drives the anti-theft tooth slider to pull the core, and then the main body of the bottle cap is ejected out of the mold by the ejector mechanism. The internal structure is very complicated, the demoulding action is many, unstable, and the processing cost is high.

On the other hand, the front and rear, left and right mold clamping (positioning) of the fixed platen and the movable platen of the existing molds all rely on the guide pillars to lock the mold, and there are generally copper sleeves installed between the fixed platen, the movable platen and the guide pillars, and the opening and closing During the mold and demoulding process, the fixed template and the movable template move towards each other along the guide pillars, so there is a gap between the fixed template, the movable template and the guide pillars, resulting in low processing accuracy of the mold, poor product quality, and waste products. High rate, increase production cost

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