Structure for solving mold stripping back-off of plastic product

Abstract

The utility model discloses a structure for solving plastic product demoulding back-off, which relates to the field of plastic mould manufacturing and comprises a base, a front mould bottom needle plate is arranged above the base, a front mould surface needle plate is clamped at the bottom of the front mould bottom needle plate, a first operation groove is arranged at the top of the front mould bottom needle plate, and a second operation groove is arranged at the bottom of the front mould surface needle plate. A second operation groove is formed in the front mold surface needle plate, and an inverted buckle insert is inserted into the first operation groove; according to the utility model, the back-off insert is fixed on the front mold bottom needle plate through the pin, and the back-off insert and the product move for a certain distance at the same time when the mold is opened under the actions of the back-off of the plastic product and the spring and the back needle behind the front mold bottom needle plate during mold opening; and a certain gap is formed under the action of the inclined surface of the inverted insert to realize free falling of the product buckle position, so that the insert is conveniently driven to be released through the inverted buckle of the plastic product and the acting force of the spring when the structure position is limited, and the product is demoulded.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold manufacturing, specifically a structure for solving the problem of undercutting during demolding of plastic products. Background Technology

[0002] A mold is a set of molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects; this tool is composed of various parts, and different molds are composed of different parts.

[0003] In existing injection molded products with complex structures, undercuts may appear in the plastic mold. Because the undercuts have structures such as flanges or hooks that attach to the mold, they cannot be demolded directly. They usually require a special undercut demolding structure. However, when the structural position is limited, the position of the undercut is restricted. In some cases where the space is relatively small and the surrounding structure is complex, undercut handling mechanisms such as sliders may be difficult to arrange or may not work properly, which is not conducive to meeting production needs and affects the production efficiency of the product. Utility Model Content

[0004] The purpose of this utility model is to provide a structure for solving the problem of undercutting during demolding of plastic products, thereby addressing the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a structure for solving the problem of undercutting in plastic products during demolding, including a base, a front mold bottom pin plate disposed on the top of the base, a front mold face pin plate being snapped into the bottom of the front mold bottom pin plate, a first operating groove being formed on the top of the front mold bottom pin plate, a second operating groove being formed inside the front mold face pin plate, an undercutting insert being inserted into the first operating groove, and a spring being fixedly connected to the top of the front mold bottom pin plate.

[0006] Furthermore, a pin is fixedly installed inside the first operating groove, and the pin is inserted into the top of the inverted insert.

[0007] Furthermore, the bottom of the front mold face pin plate is provided with a mounting hole, and a return pin is fixedly installed in the mounting hole.

[0008] Furthermore, a snap-fit ​​post is fixedly connected to the bottom of the front mold bottom pin plate, and an installation groove is provided on the top of the front mold surface pin plate, wherein the snap-fit ​​post and the installation groove are snapped together.

[0009] Furthermore, a snap-fit ​​groove is provided on the top side of one side of the front mold needle plate, and a snap-fit ​​block is fixedly connected to the bottom side of one side of the front mold bottom needle plate, and the snap-fit ​​block snaps into the snap-fit ​​groove.

[0010] Furthermore, a circular hole is provided on the top of the front mold bottom pin plate.

[0011] Furthermore, the spring is positioned directly above the inverted insert, and one end of the spring is fixedly connected to the front mold bottom pin plate.

[0012] Furthermore, the two sides of the inverted insert are set as inclined surfaces with a certain angle.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the undercut insert is fixed to the bottom pin plate of the front mold by the pin. When the mold is opened, the undercut of the plastic product itself and the spring and return pin behind the bottom pin plate of the front mold allow the undercut insert to move a certain distance at the same time as the product when the mold is opened. Under the action of the inclined surface of the undercut insert, a certain gap is formed, which allows the product to fall off freely. This makes it convenient for the insert to be disengaged by the undercut of the plastic product itself and the spring force when the structural position is restricted, so that the product can be demolded. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the exterior of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the front mold bottom pin plate of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the front mold face pin plate of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the front mold face pin plate of this utility model.

[0018] In the diagram: 1. Base; 2. Front mold bottom pin plate; 3. Front mold face pin plate; 4. Spring; 5. Undercut insert; 6. Return pin; 7. Round hole; 8. Snap-fit ​​post; 9. Snap-fit ​​block; 10. Pin; 11. Snap-fit ​​groove; 12. First operating groove; 13. Mounting groove; 14. Second operating groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This utility model provides a technical solution: including a base 1, a front mold bottom pin plate 2 is provided on the top of the base 1, a front mold face pin plate 3 is snapped onto the bottom of the front mold bottom pin plate 2, a first operating groove 12 is provided on the top of the front mold bottom pin plate 2, a second operating groove 14 is provided inside the front mold face pin plate 3, an undercut insert 5 is inserted into the first operating groove 12, a spring 4 is fixedly connected to the top of the front mold bottom pin plate 2, a mounting hole is provided at the bottom of the front mold face pin plate 3, a return pin 6 is fixedly installed in the mounting hole, and a round hole 7 is provided on the top of the front mold bottom pin plate 2.

[0021] In practice, when a product undercut occurs in the plastic mold during the mold making process, making demolding difficult and restricting the structural position, the undercut insert 5 can be fixedly installed on the front mold bottom pin plate 2 by pins 10. Before mold opening, the snap-fit ​​pin 8 snaps into the first operating groove 12, and the snap-fit ​​block 9 snaps into the snap-fit ​​groove 11. The front mold bottom pin plate 2 is fixedly installed on the top of the front mold face pin plate 3. When the mold opens, the operator can pull one end of the spring 4, and the other end of the spring 4 simultaneously drives the front mold bottom pin plate 2 to move in the vertical direction. The return pin 6 simultaneously drives the front mold bottom pin plate 2 and the front mold face pin plate 3 to move, so that the undercut insert 5 moves a certain distance at the same time as the product when the mold opens. Then, under the action of the inclined surface of the undercut insert 5, a certain gap is formed between the undercut molds, thereby realizing the free detachment of the product snap and realizing the production of the mold.

[0022] See Figure 2 and Figure 3 A pin 10 is fixedly installed inside the first operating groove 12, and the pin 10 is inserted into the top of the inverted insert 5.

[0023] By setting the pin 10, the inverted insert 5 is fixed so that the inverted insert 5 can be fixed inside the first operating groove 12.

[0024] See Figure 2 and Figure 4 The bottom of the front mold base plate 2 is fixedly connected with a snap-fit ​​post 8, and the top of the front mold face plate 3 is provided with an installation groove 13, and the snap-fit ​​post 8 and the installation groove 13 are snapped together.

[0025] By setting the snap-fit ​​pin 8 and the mounting groove 13, and aligning the snap-fit ​​pin 8 with the mounting groove 13, the front mold bottom pin plate 2 can be fixed to the top of the front mold surface pin plate 3.

[0026] See Figure 3 and Figure 4 A snap-fit ​​groove 11 is provided on the top of one side of the front mold needle plate 3, and a snap-fit ​​block 9 is fixedly connected to the bottom of one side of the front mold bottom needle plate 2. The snap-fit ​​block 9 snaps into the snap-fit ​​groove 11.

[0027] By setting a snap-fit ​​groove 11 on the top of one side of the front mold needle plate 3, when the front mold bottom needle plate 2 and the front mold needle plate 3 are snapped together, the snap-fit ​​block 9 snaps into the snap-fit ​​groove 11 to further snap together, thereby improving the stability of the snap-fit ​​between the front mold bottom needle plate 2 and the front mold needle plate 3.

[0028] See Figure 1 Spring 4 is positioned directly above the inverted insert 5, and one end of spring 4 is fixedly connected to the front mold bottom pin plate 2.

[0029] By placing the spring 4 directly above the inverted insert 5, it is easy to pull the spring 4 so that one end of the spring 4 can drive the front mold bottom pin plate 2 to move, which facilitates demolding.

[0030] See Figure 1 The two sides of the inverted insert 5 are set as bevels with a certain angle.

[0031] By setting the two sides of the undercut insert 5 as inclined surfaces with a certain angle, it is easy to form a certain gap between the undercut molds, thereby realizing the free detachment of the product fastener and realizing the production of the mold.

[0032] Working principle: When a product undercut occurs in the plastic mold during the mold making process, making demolding difficult and restricting the structural position, the undercut insert 5 can be fixedly installed on the front mold bottom pin plate 2 by the pin 10. Before mold opening, the snap-fit ​​post 8 snaps into the first operating groove 12, and the snap-fit ​​block 9 snaps into the snap-fit ​​groove 11. The front mold bottom pin plate 2 is fixedly installed on the top of the front mold face pin plate 3. When the mold opens, the operator can pull one end of the spring 4, and the other end of the spring 4 simultaneously drives the front mold bottom pin plate 2 to move in the vertical direction. The return pin 6 simultaneously drives the front mold bottom pin plate 2 and the front mold face pin plate 3 to move, so that the undercut insert 5 moves a certain distance at the same time as the product when the mold opens. Then, under the action of the inclined surface of the undercut insert 5, a certain gap is formed between the undercut mold, thereby realizing the free release of the product snap and realizing the production of the mold.

Claims

1. A structure for solving the problem of upside-down ejection of a plastic product, comprising a base (1), characterized in that: The upper portion of the base (1) is provided with a front mold bottom needle plate (2), the bottom of the front mold bottom needle plate (2) is clamped with a front mold face needle plate (3), the top of the front mold bottom needle plate (2) is provided with a first operation slot (12), the inside of the front mold face needle plate (3) is provided with a second operation slot (14), the inside of the first operation slot (12) is inserted with a reverse clamping insert (5), and the top of the front mold bottom needle plate (2) is fixedly connected with a spring (4).

2. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 1, wherein: The inside of the first operation slot (12) is fixedly installed with a pin (10), and the pin (10) is inserted into the top of the reverse clamping insert (5).

3. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 2, wherein: The bottom of the front mold face needle plate (3) is provided with a mounting hole, and the mounting hole is fixedly installed with a needle returning device (6).

4. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 3, wherein: The bottom of the front mold bottom needle plate (2) is fixedly connected with a clamping column (8), the top of the front mold face needle plate (3) is provided with a mounting slot (13), and the clamping column (8) and the mounting slot (13) are clamped.

5. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 4, wherein: The top of one side of the front mold face needle plate (3) is provided with a clamping slot (11), and the bottom of one side of the front mold bottom needle plate (2) is fixedly connected with a clamping block (9); the clamping block (9) is clamped with the clamping slot (11).

6. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 5, wherein: The top of the front mold bottom needle plate (2) is provided with a round hole (7).

7. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 6, wherein: The spring (4) is arranged directly above the reverse clamping insert (5), and one end of the spring (4) is fixedly connected with the front mold bottom needle plate (2).

8. The structure for solving the problem of the inverted buckle of the plastic product as claimed in claim 7, wherein: The two sides of the reverse clamping insert (5) are provided with inclined surfaces with a certain inclination angle.

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