Mechanism for opening mold step by step through sliding block locked by fixed mold positioning pin

Abstract

The invention discloses a mechanism for opening a mold step by step through a sliding block locked by a fixed mold positioning pin. A molding cavity which is formed between a moved mold core and a fixed mold core is connected with a casting mechanism, and a first step F is arranged on the molding cavity; a sliding block stopper, a core fixed block and a sliding block seat are arranged on the outer side of the molding cavity in sequence, a sliding block core is formed in through holes of the sliding block stopper and the core fixed block, the outer side of the sliding block core comes into contact with the sliding block seat in an abutting manner, and the sliding block seat slides on a guide rail on a sliding block pressing plate; an inclined guide pillar is arranged on the fixed mold plate, and a guide hole is formed in the sliding block seat; a positioning pin on the fixed mold plate is inserted into the sliding block stopper during mold assembly; the core fixed block is connected with the sliding block seat; the sliding block stopper is connected with the core fixed block and the sliding block seat, an idle stroke is formed between the end surface of the head of a second screw and a screw counter bore of the sliding block stopper, and the second screw can move at one end of the idle stroke; in the process of opening the mold, the time that the head of the second screw gets over the idle stroke is equal to the time that the positioning pin is pulled out of the sliding block stopper.

Description

technical field [0001] The invention relates to a plastic product manufacturing mold. Background technique [0002] This patent involves the design and manufacture of plastic moulds. The mold structure of the traditional slider demoulding, due to the structure of the product, during the mold opening process, when the pulling force of the side slider is large, the side slider slides along the side. During the movement direction of the block, the plastic product will move with the side slider. In this case, the product features formed on the main mold core will be damaged due to the pulling force of the side slider. Cannot be formed normally. For this reason, we have adopted a kind of slider step-by-step mold opening mechanism locked by fixed mold positioning nails. The influence of the drawing force of the slider is effectively eliminated, and the product features formed on the main mold core can be formed smoothly. meet the needs of production. [0003] Figure 1a , Fi...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this slider core-pulling mechanism is that when the slider core 9` is pulled out from the E of the plastic product 7`, due to the adhesion of the slider core 9` and the plastic product 7` at E, If the force is too large, the plastic product 7` will move in the direction of pulling the slider core 9`, and the entire plastic product, only the position F is pulled backwards relative to the movement direction J of the slider core 9`, but this Compared with E, the area is too small to offset the adhesion force between the slider core 9` and the plastic product 7` at E

It will cause the mold opening process, because the adhesive force on the head of the slider core 9` at E is too large, the product moves along the direction J of the slider core 9` core pulling, and the direct result is the reverse pull at F The feature is pulled and the product cannot be formed smoothly

This is the disadvantage of this mold structure

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