Exhaust insert and mold core structure

Abstract

The invention belongs to the technical field of injection molding, and discloses an exhaust insert which comprises an insert body and a cushion block, a fixing hole is formed in the insert body in a penetrating mode, a through hole corresponding to the fixing hole is formed in the cushion block, and a screw penetrates through the fixing hole and the through hole to fix the cushion block to the bottom of the insert body. The insert has the beneficial effects that the insert is easy to machine and easy to repair, assemble and install, and the insert body is of an integral structure, so that the situation that the appearance of a product is affected by multiple insert lines can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to an exhaust insert and a mold core structure. Background Art

[0002] like Figure 1 and 2 As shown, the existing exhaust insert 1 is designed to combine multiple segments with uniform widths with positioning pins 3, and is fixed to the mold body 2 from the front with screws 4. During injection molding, the gas concentrated locally in the cavity is discharged through the gaps between the segments. This structure has the following problems:

[0003] (1) The exhaust insert 1 is difficult to repair, and the trapped air at the weld line is difficult to discharge;

[0004] (2) After the lamp is lit, there are multiple clearly visible inlay lines, affecting the appearance of the product;

[0005] (3) The manufacturing process of the exhaust insert 1 is complicated and the processing cycle is long. Summary of the invention

[0006] In order to solve the defect in the prior art that the trapped air at the weld line is difficult to be discharged, thus affecting the appearance of the product, the present application provides a vent insert and a mold core structure.

[0007] In order to solve the above technical problems, the solution adopted in the present application is: an exhaust insert, including an insert body and a gasket, the insert body is penetrated by a fixing hole, the gasket is provided with a through hole corresponding to the fixing hole, and the screw passes through the fixing hole and the through hole to fix the gasket to the bottom of the insert body.

[0008] In some embodiments, an exhaust groove is provided at the bottom of the pad block, and the exhaust groove is connected to the through hole.

[0009] In some embodiments, the insert body has a horizontal bottom surface and four side surfaces, wherein two adjacent side surfaces are perpendicular to the bottom surface, and an angle between the other two side surfaces and the bottom surface is 93°.

[0010] In some embodiments, the fixing hole is a stepped hole.

[0011] The present invention also includes a mold core structure, which includes the above-mentioned exhaust insert structure, including a mold core body, the mold core body is provided with an installation cavity for installing the insert body and the gasket, the bottom of the installation cavity is provided with a screw hole, the screw is threadedly connected with the screw hole to thereby install and fix the insert body and the gasket in the installation cavity, and the bottom of the installation cavity is also provided with a vent hole connected to the outside world, the mold core body forms a molding surface on both sides of the installation cavity, and the insert body forms a parting surface on both sides of the insert body surface.

[0012] In some embodiments, an exhaust groove is provided at the bottom of the pad block, and the exhaust groove is connected to the vent hole.

[0013] In some embodiments, the insert body has a horizontal bottom surface and four side surfaces, wherein two adjacent side surfaces are perpendicular to the bottom surface, and the angle between the other two side surfaces and the bottom surface is 93°, and the mounting cavity includes four side walls, wherein two adjacent side walls are perpendicular to the bottom of the mounting cavity, and the angle between the other two side surfaces and the bottom surface is 93°.

[0014] Beneficial effects: The insert provided by the present invention is simple to process and easy to repair and install. The insert body adopts an integral structure to avoid multiple insert lines affecting the product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the mold core structure in the prior art;

[0016] Figure 2 It is a top view of the exhaust insert in the prior art;

[0017] Figure 3 This is a schematic diagram of the exhaust insert structure for this application;

[0018] Figure 4 It is a schematic diagram of the structure of the insert body;

[0019] Figure 5 It is a schematic diagram of the cushion block structure;

[0020] Figure 6 This is a cross-sectional view of the mold structure of this application;

[0021] Figure 7 This is a top view of the mold structure of this application.

[0022] In the figure, 1. exhaust insert, 2. mold body, 21. molding surface, 3. positioning pin, 4. screw, 5. insert body, 51. parting surface, 6. pad, 7. fixing hole, 8. through hole, 9. exhaust groove, 10. vent hole. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with specific implementation methods. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative changes belong to the protection scope of the present application.

[0024] like Figures 3 to 6As shown, an exhaust insert includes an insert body 5 and a cushion block 6. The insert body 5 is penetrated with a fixing hole 7, and the cushion block 6 is provided with a through hole 8 corresponding to the fixing hole 7. The screw 4 passes through the fixing hole 7 and the through hole 8 to fix the cushion block 6 to the bottom of the insert body 5.

[0025] It is assembled with the corresponding mold core to form a mold core structure for use. Specifically, the mold core body 2 can be correspondingly provided with the above-mentioned insert installation structure, specifically, as Figure 6 and 7 As shown, a mounting cavity for mounting the insert body 5 and the cushion block 6 is provided on the mold body 2, a screw hole is provided at the bottom of the mounting cavity, the screw 4 is threadedly connected to the screw hole to thereby mount and fix the insert body 5 and the cushion block 6 in the mounting cavity, and a vent hole 10 communicating with the outside is also provided at the bottom of the mounting cavity, the mold body 2 forms molding surfaces 21 on both sides of the mounting cavity, and the insert body 5 forms parting surfaces 51 on both sides of the surface of the insert body 5.

[0026] During the injection molding process using the mold core structure, if the product is trapped and flash is generated, the thickness of the pad 6 can be adjusted directly on the machine to change the overall height of the insert in the installation cavity, so that the parting surface 51 is lowered or raised, so that the height difference between the molding surface 21 and the parting surface 51 is achieved in the height direction, that is, a certain gap is generated, and the product trapped air can be directly discharged from the parting surface 51 and discharged to the outside atmosphere through the fixing hole 7, the through hole 8 and the vent hole 10, so that the product trapped air can be released to avoid affecting the product. Since the insert body 5 adopts an integrated structure, it can also avoid the generation of multiple insert lines that affect the product appearance.

[0027] like Figure 5 As shown, in order to make the exhaust smooth, in some embodiments, the bottom of the cushion block 6 is provided with an exhaust groove 9, and the exhaust groove 9 is connected to the through hole 8. After being installed with the mold core body 2, the through hole 8 is connected with the vent hole 10 on the mold core body 2, and the trapped gas of the product can reach the vent hole 10 along the exhaust groove 9 after passing through the fixing hole 7 and the through hole 8, so that the exhaust is smoother, avoiding the problem of poor exhaust caused by too close fit between the bottom surface of the cushion block 6 and the bottom of the installation cavity.

[0028] like Figure 3 and 6 As shown, in order to facilitate demolding, in some embodiments, the insert body 5 has a horizontal bottom surface and four side surfaces, two adjacent side surfaces are perpendicular to the bottom surface, and the angle between the other two side surfaces and the bottom surface is 93°. Correspondingly, the mounting cavity of the mold core body 2 is set to a matching structure, specifically, the mounting cavity is also provided with four side walls, two adjacent side walls are perpendicular to the bottom of the mounting cavity, and the angle between the other two side surfaces and the bottom surface is 93°, and the two cooperate to form a demolding slope of 3°.

[0029] like Figure 3 , 4 As shown in FIG6 , in order to facilitate the installation of the insert, in some embodiments, the fixing hole 7 is a stepped hole. After the screw 4 is installed in the fixing hole 7, its end is sunk into the fixing hole 7 and does not protrude, thereby avoiding the protrusion of the end of the screw 4 affecting the injection molding.

[0030] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of this application.

Claims

1. An exhaust insert, characterized in that it comprises an insert body (5) and a cushion block (6), wherein the insert body (5) is provided with a fixing hole (7), the cushion block (6) is provided with a through hole (8) corresponding to the fixing hole (7), and a screw (4) passes through the fixing hole (7) and the through hole (8) to fix the cushion block (6) to the bottom of the insert body (5).

2. The exhaust insert according to claim 1, characterized in that An exhaust groove (9) is provided at the bottom of the cushion block (6), and the exhaust groove (9) is connected to the through hole (8).

3. The exhaust insert according to claim 1 or 2, characterized in that: The insert body (5) has a horizontal bottom surface and four side surfaces, wherein two adjacent side surfaces are perpendicular to the bottom surface, and the angle between the other two side surfaces and the bottom surface is 93°.

4. The exhaust insert according to claim 1 or 2, characterized in that: The fixing hole (7) is a stepped hole.

5. A mold core structure, characterized in that: The exhaust insert comprises the exhaust insert as claimed in any one of claims 1 to 4, characterized in that it comprises a mold body (2), the mold body (2) is provided with an installation cavity for installing the insert body (5) and the gasket (6), the bottom of the installation cavity is provided with a screw hole, the screw (4) is threadedly connected with the screw hole to thereby install and fix the insert body (5) and the gasket (6) in the installation cavity, the bottom of the installation cavity is also provided with a vent hole (10) connected to the outside, the mold body (2) forms molding surfaces (21) on both sides of the installation cavity, and the insert body (5) forms parting surfaces (51) on both sides of the surface of the insert body (5).

6. The mold core structure according to claim 5, characterized in that: The bottom of the cushion block (6) is provided with an exhaust groove (9), and the exhaust groove (9) is communicated with the vent hole (10).

7. The mold core structure according to claim 5 or 6, characterized in that: The insert body (5) has a horizontal bottom surface and four side surfaces, wherein two adjacent side surfaces are perpendicular to the bottom surface, and the angle between the other two side surfaces and the bottom surface is 93°; the installation cavity comprises four side walls, wherein two adjacent side walls are perpendicular to the bottom of the installation cavity, and the angle between the other two side surfaces and the bottom surface is 93°.

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