Die core structure of plate embedded forming die

Abstract

The invention provides a mold core structure of a plate embedded forming mold, the mold core structure is applied to an insert injection mold, the mold is used for feeding glue from a male mold side, the mold core structure for the plate embedded forming mold comprises a male mold core, an insert is positioned and placed on the male mold core, a plastic part cavity is arranged between the male mold core and a female mold core, and the plastic part cavity is communicated with the male mold core and the female mold core. The plastic part cavity is arranged around the insert, the plastic part cavity is partially overlapped with each edge of one surface, close to the male mold core, of the insert, and the boundary, corresponding to the overlapped part of the plastic part cavity and the insert, of the plastic part cavity is in a broken line shape. The injection mold has the beneficial effects that the fold line edge is arranged at the position, corresponding to the overlapped combination position of the insert and the plastic part, on the mold core, so that the stress area of a plate in the injection molding process is increased, the deformation difference caused by extrusion of the plate due to large difference between injection molding pressure and mold clamping force is reduced, and the product yield is improved.

Description

[Technical Field]

[0001] This invention relates to the field of embedded molding technology, and in particular to a core structure for an embedded molding die for sheet metal. [Background Technology]

[0002] Insert molding refers to a molding process in which pre-prepared inserts of different materials are placed into a mold, followed by the injection of resin. The molten material bonds with the insert and solidifies to create a one-piece product. In the manufacturing process of 3C products, carbon fiber sheets and other similar materials are frequently used as inserts. Figure 1 A schematic diagram of the back structure of a conventional product is shown. The product 1 is composed of an insert 11 and a plastic part 12. The insert 11 and the plastic part 12 are joined and connected on the outer surface of the product 1. The plastic part 12 covers the surface of each side of the insert 11 on the back of the product 1, thereby overlapping and joining with each side of the insert 11. However, since the insert 11 is a foamed sheet with a relatively soft middle foam layer, during molding, the injection pressure in the plastic area acts on the sheet, and the sheet will deform due to extrusion. The clamping force in the non-plastic area acts on the mold core and also causes the sheet to deform due to extrusion. When the difference between the injection pressure and the clamping force is large, the amount of deformation caused by the extrusion of the sheet is different, which will cause plastic boundary marks to appear on the appearance of the molded product, reducing the product yield.

[0003] In view of this, the present invention provides a core structure for a sheet metal embedded molding die to solve the above problems. [Summary of the Invention]

[0004] The technical problem this invention aims to solve is: In the process of molding foamed sheet materials as inserts, the injection pressure in the plastic area acts on the sheet material, while the clamping force in the non-plastic area acts on the mold core, causing the sheet material to deform under pressure. When the difference between the injection pressure and clamping force is significant, the amount of deformation caused by the pressure varies, resulting in plastic boundary marks on the molded product and reducing product yield. This invention provides a mold core structure for sheet material insert molding to solve the above problems.

[0005] The solution to the technical problem of this invention is: a mold core structure for a sheet metal embedded molding mold, applied to an insert injection mold, wherein the mold is a male mold with side injection, and the mold core structure for the sheet metal embedded molding mold includes:

[0006] The male mold core is provided with the insert positioned on it. A plastic part cavity is provided between the male mold core and the female mold core. The plastic part cavity surrounds the insert and overlaps with each side of the insert near the male mold core. The boundary of the plastic part cavity corresponding to the overlapping part with the insert is a zigzag shape.

[0007] Preferably, the male mold core is provided with an insert positioning groove, which is used to place a positioning insert, and the plastic part cavity partially overlaps with the insert positioning groove.

[0008] Preferably, the boundary of the plastic part cavity corresponding to the overlapping portion of the insert is serrated.

[0009] The beneficial effect of this invention is that by setting a folded edge at the overlapping joint of the insert and the plastic part on the mold core, the stress area of ​​the sheet metal during the injection molding process is increased, thereby reducing the difference in the amount of deformation caused by the large difference between the injection pressure and the clamping force, and improving the product yield. [Attached Image Description]

[0010] Figure 1 This is a structural diagram of the back of a well-known product.

[0011] Figure 2 This is a schematic diagram of the core structure of an embedded molding die for sheet metal according to the present invention.

[0012] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0013] Figure 4 This is a schematic diagram of the finished product and the male mold core formed by this invention.

[0014] Figure 5 This is a schematic diagram of the back structure of the finished product formed by this invention.

Detailed Implementation Methods

[0015] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0016] This invention provides a mold core structure for a sheet metal embedded molding die, applied to an insert injection mold for molding a conventional product 1. The mold is a side-gated male mold, and the insert 11 of the product is an intermediate layer of foamed sheet metal. The mold core structure for the sheet metal embedded molding die includes:

[0017] The male mold core 2 is on which the insert 11 is positioned. A plastic part cavity 21 is provided between the male mold core 2 and the female mold core (not shown in the figure). The plastic part cavity 21 is arranged around the insert 11, and the plastic part cavity 21 overlaps with each side of the insert 11 near the male mold core 2, and is connected to each side of the insert 11 away from the male mold core 2. The boundary 210 of the plastic part cavity 21 corresponding to the overlapping part with the insert 11 is a zigzag shape, which is used to increase the force-bearing area of ​​the insert 11 during injection molding and enhance the extrusion resistance of the insert 11.

[0018] The male mold core 2 is provided with an insert positioning groove 20, which is used to place the positioning insert 11. The plastic part cavity 21 partially overlaps with the side of the insert positioning groove 20 near the male mold core 2.

[0019] Wherein, the boundary 210 of the plastic part cavity 21 corresponding to the overlapping part of the insert 11 is serrated, and the boundary of the plastic part 120 of the molded finished product 10 overlapping the insert 11 is serrated.

[0020] The process of injection molding products using the present invention is as follows: First, the sheet insert 11 is heated, and then the heated sheet is placed into the insert positioning groove 20 on the male mold core 2 of the mold for positioning. At this time, each side of the insert 11 and the part of the plastic part cavity 21 on the male mold core 2 partially overlap. Then the mold is closed and injection molded into the finished product 10. Since the boundary 210 of the overlapping part of the plastic part cavity 21 and the insert 11 is a zigzag shape, it can effectively increase the stress area of ​​the sheet during injection molding. When the difference between the injection pressure and the clamping force is relatively large, it reduces the difference in the amount of deformation caused by the extrusion of the sheet, eliminates the plastic boundary mark on the surface of the product, and improves the product yield.

[0021] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A structure of a core for a plate insert molding mold for an insert injection mold, characterized by comprising: The mold is a male mold side glue injection, the insert structure of the plate embedded forming mold comprises: Male insert, the insert is positioned and placed on the male insert, a plastic part cavity is arranged between the male insert and the female insert, the plastic part cavity surrounds the insert, and the plastic part cavity and the insert close to each edge of the surface of the male insert partially overlap, the boundary of the plastic part cavity corresponding to the overlapping part of the insert is a zigzag line.

2. The insert structure of a panel insert-molding die according to claim 1, wherein: The male insert is provided with an insert positioning groove, and the plastic part cavity partially overlaps the insert positioning groove.

3. The insert structure of a panel insert-molding die according to claim 1, wherein: The boundary of the plastic part cavity corresponding to the overlapping part of the insert is a zigzag line.

Images