Injection mold demoulding mechanism

Abstract

The present invention discloses an injection mold demoulding mechanism, comprising a panel, a front template, a slider, a shovel base, a rear template, a shovel base mounting plate, a pull rod and a limit pin; the front template and the rear template are closed to form a cavity, the slider is arranged on the front template, the shovel base mounting plate is arranged between the panel and the front template, the shovel base is arranged on the shovel base mounting plate, the top end of the pull rod is arranged on the panel, the bottom end of the pull rod passes through the shovel base mounting plate and is provided with a pull block, the pull block is used to pull the shovel base mounting plate to move, the top end of the limit pin is arranged on the shovel base mounting plate, the bottom end of the limit pin extends into the front template and is provided with a limit block, the front template is provided with a channel for the limit pin to extend into, and the channel is provided with a retaining ring for blocking the limit block. The present invention provides an injection mold demoulding mechanism, which has a reasonable structure, effectively shortens the movement distance of the shovel base, reduces the risk of mold jamming and mold collision, and makes the operation of the mold more stable.

Description

Technical Field

[0001] The invention relates to an injection mold demoulding mechanism. Background Art

[0002] Plastic injection molds are tools for producing plastic products and are widely used. In the injection molding of plastic products, the injection mold usually needs a set of demoulding mechanisms to realize the demoulding of products with undercut structures. Common demoulding mechanisms of this type include Figures 1 to 3 As shown, it includes a slider 300 and a shovel base 200 for driving the slider 300 to perform corresponding movements; wherein, the shovel base 200 is fixed on the panel 100. When the mold is opened, the mold opening stroke is long, resulting in a long movement distance H1 of the shovel base 200. When the mold is closed, it is easy for the shovel base 200 to collide with the slider 300 and get stuck, causing damage to the mold and affecting normal production. Summary of the Invention

[0003] The purpose of the present invention is to provide an injection mold demoulding mechanism with a reasonable structure, which effectively shortens the movement distance of the shovel base, reduces the risk of mold jamming and mold collision, and makes the operation of the mold more stable.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is to design an injection mold demolding mechanism, including a front mold and a rear mold, the front mold including a panel, a front mold, a slider, and a shovel base for driving the slider to perform corresponding movement; the slider is arranged on the front mold, and the rear mold includes a rear mold, and the front mold and the rear mold are closed to form a cavity; the front mold also includes a shovel base mounting plate, a pull rod and a limit pin, the shovel base mounting plate is arranged between the panel and the front mold, the shovel base is arranged on the shovel base mounting plate, the top end of the pull rod is arranged on the panel, the bottom end of the pull rod passes through the shovel base mounting plate and is provided with a pull block, the pull block is used to pull the shovel base mounting plate to move, the top end of the limit pin is arranged on the shovel base mounting plate, the bottom end of the limit pin extends into the front mold and is provided with a limit block, the front mold is provided with a channel for the limit pin to extend into, and the channel is provided with a retaining ring for blocking the limit block.

[0005] Preferably, a limiting groove for embedding the pulling block is provided at the bottom of the shovel base mounting plate.

[0006] Preferably, the rear mold further includes a bottom plate and square iron, and the square iron is arranged between the bottom plate and the rear mold plate.

[0007] The advantages and beneficial effects of the present invention are: providing an injection mold demoulding mechanism with a reasonable structure, effectively shortening the movement distance of the shovel base, reducing the risk of mold jamming and mold collision, and making the operation of the mold more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1It is a schematic diagram of the demoulding mechanism during mold closing in the prior art.

[0009] Figure 2 This is a schematic diagram of the demoulding mechanism in the prior art when the mold is opened for the first time.

[0010] Figure 3 It is a schematic diagram of the demoulding mechanism during the second mold opening in the prior art.

[0011] Figure 4 It is a schematic diagram of a demoulding mechanism of an injection mold during mold closing according to the present invention.

[0012] Figure 5 This is a schematic diagram of a demoulding mechanism of an injection mold during the first mold opening of the present invention.

[0013] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0014] Figure 7 This is a schematic diagram of a demoulding mechanism of an injection mold during the second mold opening of the present invention.

[0015] Figure 8 This is a schematic diagram of a demoulding mechanism of an injection mold during the third mold opening of the present invention. Implementation Method

[0016] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0017] The technical solution specifically implemented in the present invention is:

[0018] like Figures 4 to 8 As shown, an injection mold demolding mechanism includes a front mold and a rear mold, the front mold includes a panel 1, a front template 2, a slider 3, and a shovel base 4 for driving the slider 3 to perform corresponding movement; the slider 3 is arranged on the front template 2, and the rear mold includes a rear template 5, and the front template 2 and the rear template 5 are closed to form a cavity; the front mold also includes a shovel base mounting plate 6, a pull rod 7 and a limit pin 8, the shovel base mounting plate 6 is arranged between the panel 1 and the front template 2, the shovel base 4 is arranged on the shovel base mounting plate 6, the top end of the pull rod 7 is arranged on the panel 1, the bottom end of the pull rod 7 passes through the shovel base mounting plate 6 and is provided with a pull block 9, the pull block 9 is used to pull the shovel base mounting plate 6 to move, the top end of the limit pin 8 is arranged on the shovel base mounting plate 6, the bottom end of the limit pin 8 extends into the front template 2 and is provided with a limit block 10, the front template 2 is provided with a channel 11 for the limit pin 8 to extend into, and the channel 11 is provided with a retaining ring 12 for blocking the limit block 10.

[0019] Furthermore, a limiting groove 13 for the pulling block 9 to be embedded is provided at the bottom of the shovel base mounting plate 6 .

[0020] Furthermore, the rear mold further includes a bottom plate 14 and square irons 15 , and the square irons 15 are arranged between the bottom plate 14 and the rear mold plate 5 .

[0021] The present invention provides a working method of an injection mold demoulding mechanism, comprising the following steps:

[0022] The mold is closed and the product is injected into the cavity formed between the front template 2 and the rear template 5;

[0023] The mold is opened for the first time, and the panel 1 and the shovel base mounting plate 6 are opened. During this process, the panel 1 drives the pull rod 7 to move, and the pull block 9 of the pull rod 7 moves to be embedded in the limit groove 13 of the shovel base mounting plate 6;

[0024] The mold is opened for the second time, and the panel 1 continues to drive the pull rod 7 to move, so that the pull block 9 of the pull rod 7 pulls the shovel base mounting plate 6 to move, so that the space between the shovel base mounting plate 6 and the front template 2 is opened. In this process, the shovel base mounting plate 6 drives the shovel base 4 to move, and then the shovel base 4 drives the slider 3 to perform the core pulling action. At the same time, the shovel base mounting plate 6 will also drive the limit pin 8 to move until the limit block 10 of the limit pin 8 moves to be blocked by the retaining ring 12. At this time, the shovel base mounting plate 6 and the shovel base 4 will stop moving, and the slider 3 will complete the core pulling action.

[0025] The mold is opened for the third time, the front template 2 and the rear template 5 are opened, the product is ejected, and the product is taken out by the robot.

[0026] In the above working method, the movement distance H2 of the shovel base 4 is much smaller than the movement distance H1 of the shovel base 200 in the prior art, thereby effectively shortening the movement distance of the shovel base 4, reducing the risk of mold jamming and mold collision, and making the operation of the mold more stable.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An injection mold demoulding mechanism, comprising a front mold and a rear mold, wherein the front mold comprises a panel, a front template, a slider, and a shovel base for driving the slider to perform corresponding movements; the slider is disposed on the front template, and the rear mold comprises a rear template, wherein the front template and the rear template are closed to form a mold cavity, characterized in that: The front mold also includes a shovel base mounting plate, a pull rod and a limit pin. The shovel base mounting plate is arranged between the panel and the front template, the shovel base is arranged on the shovel base mounting plate, the top end of the pull rod is arranged on the panel, the bottom end of the pull rod passes through the shovel base mounting plate and is provided with a pull block, the pull block is used to pull the shovel base mounting plate to move, the bottom of the shovel base mounting plate is provided with a limit groove for the pull block to be embedded, the top end of the limit pin is arranged on the shovel base mounting plate, the bottom end of the limit pin extends into the front template and is provided with a limit block, the front template is provided with a channel for the limit pin to extend into, and the channel is provided with a retaining ring for blocking the limit block.

2. The injection mold demoulding mechanism according to claim 1, characterized in that: The rear mold further comprises a bottom plate and square irons, and the square irons are arranged between the bottom plate and the rear mold plate.

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