CN213733206U

CN213733206U - Front mold demoulding structure

Info

Publication number: CN213733206U
Application number: CN202022164913.0U
Authority: CN
Inventors: 罗干
Original assignee: Shenzhen Dongchuang Technology Co Ltd
Current assignee: Shenzhen Dongchuang Technology Co Ltd
Priority date: 2020-09-26
Filing date: 2020-09-26
Publication date: 2021-07-20
Anticipated expiration: 2030-09-26

Abstract

The utility model relates to a front mould demoulding structure. At least one insert capable of moving up and down is arranged in the front mold core, the front mold core is arranged in the front template, at least one pressure spring is arranged between the front mold core and the front template, one end of the pressure spring abuts against the front template, and the other end of the pressure spring abuts against the insert; when the die is closed, the bottom surface of the insert is flush with the bottom surface of the front die core; during injection molding, the bottom surface of the insert is tightly attached to the surface of an injection molding piece; when the injection molding piece is demolded, the front mold core and the front template move upwards, the pressure spring exerts downward pressure on the injection molding piece through the insert, so that the injection molding piece is separated from the front mold core. The utility model discloses an insert and the pressure spring can produce the holding down force to the injection molding when the drawing of patterns for the injection molding can break away from with front mould benevolence smoothly under the holding down force, avoided the sticking die and the condition of unable drawing of patterns, improved the yields of moulding plastics, reduced manufacturing cost.

Description

Front mold demoulding structure

Technical Field

The utility model relates to an equipment of moulding plastics especially relates to a front mould demoulding structure.

Background

After the injection molding of the plastic product is finished, the mold opening is needed to finish the demolding of the product, and the matching of an ejection mechanism is needed when the product is taken out from the mold cavity. In the product structure, often meet the condition that the position is glued to the front mould is glued to the position more than the back mould, lead to the product to be stained with and can't demold in the die cavity. If the upper part and the lower part are reversely injected, the appearance is affected at the position where the top needle is placed. There is a need to develop a structure to assist in the disengagement of the injection molded part from the front mold.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's above defect, and provide a front mould demoulding structure to make the injection molding can break away from the front mould smoothly.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a front mould demoulding structure is characterized in that at least one insert capable of moving up and down is arranged in a front mould core, the front mould core is arranged in a front template, at least one pressure spring is arranged between the front mould core and the front template, one end of the pressure spring abuts against the front template, and the other end of the pressure spring abuts against the insert; the bottom surface of the insert is flush with the bottom surface of the front mold core; during injection molding, the bottom surface of the insert is tightly attached to the surface of an injection molding piece; when the injection molding piece is demolded, the front mold core and the front template move upwards, the pressure spring exerts downward pressure on the injection molding piece through the insert, so that the injection molding piece is separated from the front mold core.

The front die core is provided with a limiting groove, the insert is provided with a boss, the boss is placed in the limiting groove, and the limiting groove and the boss are used for limiting the maximum downward movement stroke of the front die core.

The front template is provided with an upper groove, the insert is provided with a corresponding lower groove, the upper end of the pressure spring is inserted into the upper groove, and the lower end of the pressure spring is inserted into the lower groove.

When the mold is closed, one part of the bottom surface of the insert is abutted against the top surface of the lower mold core, and the other part of the bottom surface of the insert is tightly attached to the surface of an injection molding piece during injection molding.

Compared with the prior art, the utility model beneficial effect be: can produce the holding down force to the injection molding through inserting and the pressure spring when the drawing of patterns for the injection molding can break away from with front mould benevolence smoothly under the holding down force, avoided the condition of sticking the mould and unable drawing of patterns, improved the yields of moulding plastics, reduced manufacturing cost.

Drawings

Fig. 1 is a cross-sectional view of the front mold stripping structure of the present invention.

It should be noted that, the products shown in the above views are all appropriately reduced/enlarged according to the size of the drawing and the clear view, and the size of the products shown in the views is not limited.

Detailed Description

In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and explained with reference to the specific embodiments.

The embodiment of the utility model provides a front mould demoulding structure, its concrete structure is shown in figure 1.

As shown in fig. 1, a front core 12 is disposed in a front mold plate 11, and an insert 14 which can move up and down is disposed in the front core 12. A compression spring 15 is arranged between the front die core 12 and the front template 11. One end of the pressure spring 15 is abutted against the front template 11, and the other end is abutted against the insert 14. Specifically, the front template 11 is provided with an upper groove 111, the insert 14 is provided with a corresponding lower groove 141, the upper end of the pressure spring 15 is inserted into the upper groove 111, and the lower end is inserted into the lower groove 141. The front mold core 12 is provided with a limiting groove 121, and the insert 14 is provided with a corresponding boss 142. The boss 142 is disposed in the limiting groove 121. The limiting groove 121 and the boss 142 are used for limiting the maximum downward movement stroke of the front mold core 12.

When the mold is closed, the front mold core 12 and the front template 11 gradually move downwards, and a part of the bottom surface of the insert 14 is contacted with the top surface of the lower mold core 13 and is propped against each other in the downward moving process. The top surface of the lower core 13 restrains the insert 14 so that the insert 14 is not inserted into the cavity. After the mold closing is completed, the bottom surface of the insert 14 is flush with the bottom surface of the front mold core 12, and the bottom surface of the insert 14 does not influence the mold cavity. When the mold cavity is filled with the glue during injection after mold closing, the other part of the bottom surface of the insert 14 is tightly attached to the surface of the injection molding piece 19.

Demolding is started after the injection molding is completed. During demolding, the front mold core 12 moves upwards synchronously with the front mold plate 11, and the compression spring 15 applies downward pressure to the injection molding piece 19 through the insert 14, so that the injection molding piece 19 cannot move upwards and is separated from the front mold core 12.

In other embodiments, if the injection molded part is large, more than 1 insert can be provided in a front core. More than 1 compression spring can also be arranged corresponding to one insert.

In the embodiment, the insert 14 and the pressure spring 15 can generate downward pressure on the injection molding piece 19 during demolding, so that the injection molding piece 19 can be smoothly separated from the front mold core 12 under the downward pressure, the condition that demolding cannot be performed due to mold sticking is avoided, the injection molding yield is improved, and the production cost is reduced.

In the description of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The above description is only for the purpose of illustrating the technical content of the present invention by way of example, so as to facilitate the understanding of the reader, but does not represent that the embodiments of the present invention are limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention.

Claims

1. A front mould demoulding structure is characterized in that at least one insert capable of moving up and down is arranged in a front mould core, the front mould core is arranged in a front template, at least one pressure spring is arranged between the front mould core and the front template, one end of the pressure spring abuts against the front template, and the other end of the pressure spring abuts against the insert; when the die is closed, the bottom surface of the insert is flush with the bottom surface of the front die core; during injection molding, the bottom surface of the insert is tightly attached to the surface of an injection molding piece; when the injection molding piece is demolded, the front mold core and the front template move upwards, the compression spring exerts downward pressure on the injection molding piece through the insert, so that the injection molding piece is separated from the front mold core.

2. The front mold stripping structure as recited in claim 1, wherein the front mold core is provided with a limiting groove, the insert is provided with a boss, the boss is disposed in the limiting groove, and the limiting groove and the boss are used for limiting the maximum downward movement stroke of the front mold core.

3. The front mold stripping structure as set forth in claim 1, wherein said front mold plate is provided with an upper groove, said insert is provided with a corresponding lower groove, and said compression spring is inserted at an upper end thereof into said upper groove and at a lower end thereof into said lower groove.

4. The front mold release structure of claim 1, wherein a portion of the bottom surface of the insert abuts the top surface of the bottom core during mold closing, and another portion of the bottom surface of the insert abuts the surface of the injection molded part during injection molding.