CN204546959U - Automatic Break Gate Structure - Google Patents

Abstract

An automatic gate breaking structure, which includes: a male mold inlet, which is arranged in the male mold core; an overlapping gate, one side of which is connected to the flow channel, and the other side is arranged on the male mold inlet for forming The upper cover of the keyboard, the overlapping gate also has a false gate bent downward; a number of thimbles, one end of which is fixed in the upper ejection plate, and the other end is against the upper cover of the keyboard; One end is set on the lower fixed plate, and the other end abuts against the lower end of the lap sprue. The catch pin is provided with a countersunk head corresponding to the position of the upper ejector plate, and there are avoidance holes in the upper ejector plate and the lower ejector plate. , the countersunk head is arranged in the escape hole and has an escape distance from the lower end surface of the escape hole. The automatic break gate structure of the utility model replaces the corner gate by using the lap gate, and is provided with a countersunk head on the grasping pin for delayed ejection, so that the lap gate and the upper cover of the keyboard and the The separation of the male mold core is completed, which solves the problem that the horn gate is easy to break when it is ejected, and it is not easy to eject.

Description

Automatic break gate structure

【Technical field】

The utility model relates to an automatic gate breaking structure of a mould, in particular to an automatic gate breaking structure of an overlapping gate.

【Background technique】

As we all know, the upper cover of the keyboard includes many key holes, and the key caps are inserted into the key holes to form the keyboard. The upper cover of the keyboard is mostly made of plastic material. When the upper cover of the keyboard is injection molded, because the shape of the upper cover of the keyboard is special, in the prior art, only the key holes can be used to feed materials.

When the upper cover of the keyboard is injection-molded, the horn gate is often used to feed the glue. However, for some key holes with smaller specifications, the horn gate is easy to break when it is ejected, and it is not easy to eject.

In view of this, it is necessary to develop an automatic gate breaking structure to solve the above-mentioned problem that the corner gate is easily broken and difficult to eject when forming the upper cover of the keyboard.

【Content of invention】

Therefore, the purpose of this utility model is to provide an automatic breaking gate structure, which can solve the above-mentioned problem that the corner gate is easy to break and difficult to eject when forming the upper cover of the keyboard.

In order to achieve the above-mentioned purpose, the automatic gate breaking structure of the present utility model is applied to the upper cover of the keyboard formed in the mold. , master mold core, master template and runner, the automatic gate breaking structure includes:

A male mold insert, which is set in the male mold core;

An overlapping gate, one side of which is connected to the flow channel, and the other side is arranged on the upper cover of the male mold to form a keyboard, and the overlapping gate also has a false gate bent downward;

A plurality of thimbles, one end of which is fixed in the upper ejection plate, and the other end runs through the male template and the male mold core and bears against the upper cover of the keyboard;

Grab material pin, one end of which is arranged on the lower fixing plate, and the other end runs through the lower ejector plate, upper ejector plate, male template and male mold insert of the mold to abut against the lower end of the lap sprue. The position of the material pin corresponding to the upper ejection plate is provided with a countersunk head, and the upper ejection plate and the lower ejection plate are provided with avoidance holes, and the countersunk head is arranged in the avoidance hole and is aligned with the lower end surface of the escape hole. Has avoidance distance.

Optionally, the grasping pin is set on the lower fixing plate.

Optionally, a hook-shaped notch is provided at the lower end of the overlapping gate, and correspondingly, one end of the grasping pin abutting against the overlapping gate is provided with a protrusion to cooperate with the hook-shaped notch.

Compared with the prior art, the automatic gate breaking structure of the utility model, when forming the upper cover of the keyboard, replaces the corner gate by using the lap gate, and by setting the countersunk head on the grab pin to delay Ejection, so that the lap gate is separated from the upper cover of the keyboard and the male mold core, thus solving the problem that the horn gate is easy to break and difficult to eject during ejection.

【Description of drawings】

FIG. 1 shows a schematic diagram of the automatic gate breaking structure of the present invention.

FIG. 2 is a three-dimensional schematic diagram of a part of the automatic gate breaking structure of the present invention.

FIG. 3 is a cross-sectional view of FIG. 2 .

FIG. 4 is a schematic diagram of a first ejection state of a part of the automatic gate breaking structure of the present invention.

FIG. 5 is a schematic diagram of a second ejection state of a part of the automatic gate breaking structure of the present invention.

【Detailed ways】

Please refer to Fig. 1, Fig. 2 and Fig. 3, wherein Fig. 1 depicts a schematic diagram of the utility model's automatic gate breaking structure, and Fig. 2 depicts a perspective schematic diagram of a part of the utility model's automatic gate breaking structure, and Fig. 3 A cross-sectional view of FIG. 2 is shown.

The automatic gate breaking structure of the present utility model is applied to the upper cover 10 of the forming keyboard in the mold, and the mold includes a lower fixing plate 11, a lower ejector plate 12, an upper ejector plate 13, a male template 14, and a male mold core. 15. Mother mold core 16, mother template 17 and runner 18. In this embodiment, the automatic gate breaking structure includes:

Male mold insert 19, which is located in the male mold core 15;

Overlapping gate 20, one side of which is connected to runner 18, and the other side is arranged on the upper cover 10 of the keyboard formed on the male mold entry 19, and said overlapping gate 20 also has a downwardly bent False gate 21, described false gate 21 is used for balancing;

A plurality of thimbles 22, one end of which is fixed in the upper ejection plate 13, and the other end runs through the male template 14 and the male mold core 15 and bears against the upper cover 10 of the keyboard;

Grab pin 23, one end of which is arranged on the lower fixing plate 11, and the other end runs through the lower ejector plate 12, upper ejector plate 13, male template 14 and male mold inlet 19 of the mold to abut against the lap gate 20, the grabbing pin 23 is provided with a countersunk head 24 corresponding to the position of the upper ejection plate 13, and the upper ejection plate 13 and the lower ejection plate 12 are correspondingly provided with an avoidance hole 25. The head 24 has a clearance distance from the lower end surface of the clearance hole 25 .

Wherein, in order to bear the pressure during injection molding, the grasping pin 23 is arranged on the lower fixing plate 11 by breaking.

Wherein, in order to abut against the overlapping gate 20 better, the grasping pin 23 is provided with a hook-shaped notch at the lower end of the overlapping gate 20, and correspondingly the grasping pin 23 abuts against One end of the overlapping gate 20 is provided with a protrusion to fit into the hook-shaped notch.

Please refer to FIG. 4 , which depicts a schematic diagram of the first ejection state of a part of the automatic gate breaking structure of the present invention. After the upper cover 10 of the keyboard is formed, during the ejection process, the upper ejector plate 13 and the lower ejector plate 12 drive the ejector pin 22 to eject, and the upper cover 10 of the formed keyboard is ejected upwards, and the gripping pin 23 Because the countersunk head 24 has an escape distance from the lower end surface of the escape hole 25, the grasping pin 23 is pushed out with a delay, and the lap gate 20 is stationary, and the false pouring of the lap gate 20 Under the pulling force of the gate 21, the overlapping gate 20 is separated from the upper cover 10 of the keyboard.

Please refer to FIG. 5 , which depicts a schematic diagram of a partial second ejection state of the automatic gate breaking structure of the present invention. After the overlapping gate 20 is separated from the upper cover 10 of the keyboard, when the countersunk head 24 of the grasping pin 23 contacts the lower end surface of the empty hole 25, the grasping pin 23 and the upper ejection plate 13. The lower ejector plate 12 and the ejector pin 22 are ejected together, and the grasping pin 23 ejects the lap gate 20, so that the lap gate 20 is separated from the male mold insert 19 in the male mold core 15 Complete the demoulding action. In addition, after the ejection is completed, the same ejection action can be continued twice to prevent the overlapping gate 20 from occasionally falling incompletely, and to prevent the overlapping gate 20 from being molded.

Compared with the prior art, the automatic gate breaking structure of the present utility model replaces the horn gate by using the overlapping gate 20 when forming the upper cover 10 of the keyboard, and by setting the sinker on the grasping pin 23 The ejection of the head 24 is delayed, so that the overlapping gate 20 is separated from the formed keyboard cover 10 and the male mold core 15, thereby solving the problem that the corner gate is easily broken and difficult to eject.

Claims (3)

1. an automatic Break Gate Structure, it is applied to the upper cover of die for molding keyboard, described mould comprises bottom plate, lower liftout plate, upper ejector plate, male template, male die core, mother module core, caster and runner, it is characterized in that, described automatic Break Gate Structure comprises:

Male die insert, it is located in described male die core;

Bridging type cast gate, its side connecting passage, opposite side is located at the upper cover of shaping keyboard on male die insert, and described bridging type cast gate also has the false cast gate of bending downwards;

Some thimbles, its one end is fixed in upper ejector plate, and the other end runs through male template and male die core and heads on the upper cover of described keyboard;

Material grasping pin, its one end is located on bottom plate, the other end runs through the lower end that the lower liftout plate of mould, upper ejector plate, male template and male die insert abut described bridging type cast gate, the position of the corresponding upper ejector plate of described material grasping pin is provided with countersunk head, be provided with emptiness avoiding hole in described upper ejector plate and lower liftout plate, described countersunk head is located in emptiness avoiding hole and with the lower surface of emptiness avoiding hole has empty avoiding distance.

2. automatic Break Gate Structure according to claim 1, is characterized in that, described material grasping pin breaking is located on described bottom plate.

3. automatic Break Gate Structure according to claim 1, is characterized in that, the lower end of described bridging type cast gate is provided with hook breach, and one end that described material grasping pin abuts described bridging type cast gate is accordingly provided with projection and coordinates with described hook breach.