CN219806405U - Broken tooth demoulding structure is prevented to internal thread helical tooth shaft spare of moulding plastics - Google Patents

Abstract

The utility model relates to an anti-breaking demolding structure of an internal thread helical tooth injection molding shaft piece, which comprises a motor, a gear transmission assembly, a lower template, tooth bars and a top plate, wherein a fixed die core is fixedly connected to the lower template, a movable die core is rotationally connected to the fixed die core, forming holes are formed in the middle parts of the fixed die core and the movable die core, the tooth bars are positioned in the forming holes, the tooth bars are rotationally and slidingly connected with the lower template and the top plate, helical tooth grooves are formed in the movable die core at the forming holes, abdicating grooves are formed in the lower template at two sides of the movable die core, a spring is arranged in the abdicating grooves, one end of the spring is fixedly connected with the movable die core, the other end of the spring is fixedly connected with the lower template, and a plurality of ejector rods are arranged on the top plate. The beneficial effects of the utility model are as follows: the demolding device can adapt to demolding processing of the injection molding shaft piece with the internal threads and the external helical teeth, avoids breakage of the helical teeth of the injection molding shaft piece during demolding, improves the processing quality of products, and is high in production efficiency.

Description

Broken tooth demoulding structure is prevented to internal thread helical tooth shaft spare of moulding plastics

Technical Field

The utility model relates to the field of injection mold processing, in particular to an anti-tooth breakage demoulding structure of an internal thread helical tooth injection molding shaft piece.

Background

The injection mold is one of the important tools for producing plastic products, plastic pieces with various shapes can be produced and manufactured through the mold, and in the molding process of plastic pieces with different structures, different demolding structures are needed for demolding,

the existing plastic shaft piece one end is equipped with the through-hole, is equipped with the internal thread in the through-hole, is equipped with round helical tooth on the shaft body of shaft piece, and current internal thread demoulding structure is when carrying out the drawing of patterns, and current internal thread demoulding structure is through motor cooperation gear and tooth pole to the screw thread part drawing of patterns, later ejecting product.

However, in a general internal thread demoulding structure, when a plastic shaft is ejected after thread separation, the helical tooth part of the plastic shaft is broken, so that an internal thread helical tooth injection moulding shaft breakage-proof demoulding structure is required.

Disclosure of Invention

The purpose of the utility model is that: the utility model provides a broken tooth demoulding structure is prevented to internal thread helical tooth injection molding shaft spare can adapt to the drawing of patterns processing of the injection molding shaft spare that possesses internal thread and outer helical tooth simultaneously, avoids causing the helical tooth part of injection molding shaft spare to take place the rupture when the drawing of patterns, improves product processingquality, and production efficiency is higher.

In order to achieve the above object, the present utility model provides the following technical solutions: the utility model provides an internal thread helical tooth shaft spare prevents tooth drawing of patterns structure that breaks, includes motor, gear drive subassembly, lower bolster, dental pole and roof, fixedly connected with cover half benevolence on the lower bolster, rotate on the cover half benevolence and be connected with the movable mould benevolence, the shaping hole has all been opened at the middle part of cover half benevolence and movable mould benevolence, dental pole is located the shaping downthehole, dental pole and lower bolster and roof both rotate and sliding connection, lie in shaping hole department on the movable mould benevolence and open and have oblique tooth's socket, lie in the movable mould benevolence both sides on the lower bolster and open and have the groove of stepping down, the inslot of stepping down is provided with the spring, the one end and the movable mould benevolence fixed connection of spring, the other end and the lower bolster fixed connection of spring, be provided with a plurality of ejector pins on the roof.

Further, the rotating shaft of the motor is fixedly connected with the input end of the gear transmission assembly, and the tooth bar is fixedly connected with the output end of the gear transmission assembly.

Further, a locking groove is formed in the movable die core, the fixed die core, the movable die core and the dental bar are coaxially arranged, a protruding block part is arranged at the bottom of the movable die core, the protruding block part stretches into the abdicating groove, and the spring is fixedly connected with the protruding block part of the movable die core.

Further, the ejector rod is fixedly connected with the top plate, the ejector rod is in sliding connection with the fixed die core, and the ejector rods are in particular multiple.

The beneficial effects of the utility model are as follows: the demolding device can adapt to demolding processing of the injection molding shaft piece with the internal threads and the external helical teeth, avoids breakage of the helical teeth of the injection molding shaft piece during demolding, improves the processing quality of products, and is high in production efficiency.

Drawings

FIG. 1 is a schematic view of a first view of an anti-tooth breakage demolding structure for an internal thread helical tooth injection molding shaft member;

FIG. 2 is a second view of the anti-breaking demolding structure of the internal thread helical injection molding shaft member according to the present utility model;

FIG. 3 is an explosion schematic diagram of a fixed die core of the internal thread helical tooth injection molding shaft part anti-tooth breakage demoulding structure;

fig. 4 is a schematic view of a plastic shaft.

In the figure: 1. a motor; 2. a gear drive assembly; 3. a lower template; 301. a relief groove; 4. a dental stem; 5. a fixed mould core; 6. a movable mold core; 601. a locking groove; 602. oblique tooth grooves; 7. a spring; 8. a push rod; 9. and a top plate.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-4, the anti-breaking demolding structure for the internal thread helical tooth injection molding shaft piece comprises a motor 1, a gear transmission assembly 2, a lower template 3, a tooth bar 4 and a top plate 9, wherein the motor 1 is used for driving the tooth bar 4 to demold, a fixed die core 5 is fixedly connected to the lower template 3, a movable die core 6 is rotationally connected to the fixed die core 5, the fixed die core 5 and the movable die core 6 are used for participating in molding of a plastic shaft piece, molding holes are formed in the middle parts of the fixed die core 5 and the movable die core 6, the tooth bar 4 is positioned in the molding holes, the tooth bar 4 is rotationally and slidingly connected with the lower template 3 and the top plate 9, a helical tooth groove 602 is formed in the position of the movable die core 6, a yielding groove 301 is formed in two sides of the movable die core 6, a spring 7 is arranged in the yielding groove 301 and is used for resetting after the movable die core is deflected, one end of the spring 7 is fixedly connected with the movable die core 6, and the other ends of the movable die core 6 are fixedly connected with the upper template 3 and the top plate 9, and the top plate 8 is fixedly connected with the upper template 8.

The rotary shaft of the motor 1 is fixedly connected with the input end of the gear transmission assembly 2, the motor 1 drives the tooth bar 4 to rotate downwards through the gear transmission assembly 2 and separate from the injection molding shaft piece, so that demolding of the internal thread is completed, and the tooth bar 4 is fixedly connected with the output end of the gear transmission assembly 2.

The movable mold core 6 is provided with a locking groove 601, the locking groove 601 is used for locking the position of the movable mold core 6 during mold closing and injection molding, a specific locking action can be realized by arranging a bulge corresponding to the locking groove 601 on an upper mold plate of the mold, the bulge on the upper mold plate is inserted into the locking groove 601 during mold closing to prevent the movable mold core 6 from deflecting in the injection molding process, the fixed mold core 5, the movable mold core 6 and the tooth bar 4 are coaxially arranged, the bottom of the movable mold core 6 is provided with a lug part, the lug part on the movable mold core 6 is used for resetting in cooperation with a spring 7, the lug part stretches into the yielding groove 301, and the spring 7 is fixedly connected with the lug part of the movable mold core 6.

The ejector rod 8 is fixedly connected with the top plate 9, the ejector rod 8 is in sliding connection with the fixed die core 5, after the injection molding shaft piece is molded, the top plate 9 drives the ejector rod 8 to lift the injection molding shaft piece, so that the plastic shaft piece is separated from the fixed die core 5 and the movable die core 6, demolding is completed, and the ejector rod 8 is particularly multiple.

The working principle of the utility model is as follows: when the plastic shaft is subjected to mold closing and injection molding, the upper mold plate and the lower mold plate 3 of the mold are separated after the plastic shaft is subjected to cooling molding, firstly, the motor 1 drives the tooth bar 4 to rotate through the gear transmission assembly 2, the tooth bar 4 rotates and moves downwards when being separated from the internal thread of the injection shaft until the tooth bar 4 is completely separated from the injection shaft, then the top plate 9 is pushed upwards, the injection shaft is ejected upwards to be demolded under the action of the ejector rod 8, the movable mold core 6 rotates and compresses the spring 7 under the action of the helical teeth in the demolding process, and after the injection shaft is completely separated from the movable mold core 6, the movable mold core 6 rotates in situ under the action of the spring 7, so that the demolding is completed.

The above examples are provided to further illustrate the utility model and do not limit the utility model to these specific embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be construed as being within the protection scope of the present utility model.

Claims (4)

1. The utility model provides an internal thread helical tooth injection molding axle spare prevents broken tooth drawing of patterns structure which characterized in that: including motor (1), gear drive subassembly (2), lower bolster (3), dental pole (4) and roof (9), fixedly connected with cover half benevolence (5) on lower bolster (3), rotate on cover half benevolence (5) and be connected with movable mould benevolence (6), the shaping hole has all been opened at the middle part of cover half benevolence (5) and movable mould benevolence (6), dental pole (4) are located the shaping downthehole, dental pole (4) both rotate and sliding connection with lower bolster (3) and roof (9), be located shaping downthehole department on movable mould benevolence (6) and open and have skewed tooth groove (602), be located movable mould benevolence (6) both sides on lower bolster (3) and open and have groove (301) of stepping down, be provided with spring (7) in groove (301), the one end and the movable mould benevolence (6) fixed connection of spring (7), the other end and the lower bolster (3) fixed connection of spring (7), be provided with a plurality of ejector pins (8) on roof (9).

2. The internal thread helical tooth injection molding shaft part breakage-proof demolding structure according to claim 1, wherein: the rotating shaft of the motor (1) is fixedly connected with the input end of the gear transmission assembly (2), and the tooth bar (4) is fixedly connected with the output end of the gear transmission assembly (2).

3. The internal thread helical tooth injection molding shaft part breakage-proof demolding structure according to claim 1, wherein: the movable die core (6) is provided with a locking groove (601), the fixed die core (5), the movable die core (6) and the tooth bar (4) are coaxially arranged, the bottom of the movable die core (6) is provided with a convex block part, the convex block part stretches into the abdicating groove (301), and the spring (7) is fixedly connected with the convex block part of the movable die core (6).

4. The internal thread helical tooth injection molding shaft part breakage-proof demolding structure according to claim 1, wherein: the ejector rods (8) are fixedly connected with the top plate (9), the ejector rods (8) are slidably connected with the fixed die core (5), and the ejector rods (8) are multiple.