Die pull-in prevention for automobile gear box mold

Abstract

The utility model relates to gearbox mould technical field, especially the draw -in son of automobile gearbox mould's prevention, including the draw -in son body, still including the limit step, the lateral wall of draw -in son body is provided with the forming part, the forming part is fixedly connected with draw -in son body, the top of draw -in son body is installed with the limit step, and the limit step cooperates with the bottom surface step of mould positioning plate when opening the mould, and the limit step is used for limiting draw -in son body with the upward displacement of loose mould in the initial stage of opening the mould, the utility model discloses a limit step is arranged, and the rigid cut -off of draw -in son body is realized in the mould opening moment, eliminates the risk of casting injury and mould scratch, significantly improves product yield, simultaneously dispenses with the use of spring ejector pin and other vulnerable parts, makes mould structure more simplified and reliable, greatly reduces maintenance frequency and downtime loss, and in combination with integrated cooling runner design, realizes the accurate control of mould temperature, has remarkable economic benefits and market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of gearbox mold technology, and in particular to an anti-pull mold insert for automotive gearbox molds. Background Technology

[0002] In automotive gearbox molds, anti-pull mold inserts (also known as anti-pull mold inserts or anti-pull mold ejectors) are a key design component, mainly used to solve problems such as material adhesion, tearing, or deformation that may occur during metal forming or demolding.

[0003] In the existing automotive transmission mold opening process, the excessive adhesion between the casting and the molding insert causes the molding insert to be easily pulled upwards by the casting during mold opening, resulting in surface scratches or deformation of the casting, which seriously affects product quality and may even lead to the scrapping of the casting. In addition, this problem will also shorten the service life of the mold and increase production costs.

[0004] Therefore, in response to the problem that the molding insert is easily pulled upward by the adhesion force of the casting during the mold opening of the existing automotive transmission mold, resulting in the casting being damaged and scrapped, an anti-pull molding insert for automotive transmission molds can be designed. Utility Model Content

[0005] To overcome the problem that when existing automotive transmission molds are opened, the molding insert is easily pulled upwards by the adhesion force of the casting, resulting in the casting being damaged and scrapped.

[0006] The technical solution of this utility model is as follows: an anti-pull mold insert for an automotive gearbox mold, including an insert body; and a limiting step, wherein a forming part is provided on the side wall of the insert body, the forming part is fixedly connected to the insert body, and a limiting step is installed on the top of the insert body. When the mold is opened, the limiting step cooperates with the bottom step of the mold positioning plate. The limiting step is used to limit the upward displacement of the insert body with the moving mold in the initial stage of mold opening.

[0007] Preferably, by protruding a limiting step on the top of the insert body, and interfering with the step on the bottom surface of the fixed template, the insert is physically blocked from moving upward with the moving mold. At the moment of mold opening, the step is stuck on the bottom surface of the fixed template, forcing the insert to separate from the casting. The limiting is triggered when the adhesion force is at its maximum in the early stage of mold opening, thus preventing the insert body from being continuously pulled. This solves the problem that the forming insert is easily pulled upward by the adhesion force of the casting when the existing automotive gearbox mold is opened, resulting in the casting being damaged and scrapped.

[0008] Preferably, the limiting step extends continuously along the top edge of the insert body to form a closed loop structure, and the limiting step is used to evenly distribute the mold opening pull force.

[0009] Preferably, the stepped surface of the limiting step is an inclined guide surface, and the inclined direction of the inclined guide surface of the limiting step is at an acute angle to the mold opening direction. The inclined guide surface of the limiting step is used to guide the separation trajectory of the fixed template and the insert body.

[0010] Preferably, the side wall of the insert body is provided with a guide groove, which slides in conjunction with the guide block of the moving mold. The guide groove is used to constrain the movement path of the insert body.

[0011] Preferably, the demolding side of the molding part is provided with a separation hole, which is an inverted cone shape. The separation hole is used to reduce the adsorption area between the product and the molding part.

[0012] Preferably, a limiting block is provided at the bottom of the insert body, and the limiting block cooperates with the moving mold base.

[0013] Preferably, the insert body has a cooling water channel inside, and the inlet and outlet of the cooling water channel extend to the top end face of the insert body. The cooling water channel is used to connect with the external cooling pipe of the mold.

[0014] The beneficial effects of this utility model are:

[0015] By setting limit steps, the insert can be rigidly stopped at the moment of mold opening during use, completely eliminating the risk of casting damage and mold scratches. At the same time, the design of vulnerable parts such as spring ejector pins is eliminated, which greatly reduces the frequency of maintenance and downtime losses. Combined with integrated cooling function, molding efficiency is improved simultaneously, achieving technical benefits of quality assurance, cost control and production efficiency optimization. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the molding part of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the limiting block of this utility model;

[0019] Figure 4 The diagram shown is a schematic representation of the insert body structure of this utility model.

[0020] Figure 5 The diagram shown is a half-sectional three-dimensional structural schematic of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Insert body; 2. Molding part; 3. Limiting step; 4. Guide groove; 5. Separation hole; 6. Limiting block; 7. Cooling water channel. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5 This utility model provides an embodiment of an anti-pull mold insert for an automotive gearbox mold, including an insert body 1 and a limiting step 3. The side wall of the insert body 1 is provided with a forming part 2, which is fixedly connected to the insert body 1. The limiting step 3 is installed on the top of the insert body 1. When the mold is opened, the limiting step 3 cooperates with the bottom step of the mold positioning plate. The limiting step 3 is used to limit the upward displacement of the insert body 1 with the moving mold in the initial stage of mold opening. By adopting the structural design of adding a limiting step 3 to the top of the insert body 1, mechanical interference is achieved through the step cooperation formed by the limiting step 3 and the bottom surface of the fixed mold plate. When the mold is opened, the limiting step 3 and the bottom surface of the fixed mold plate generate rigid blocking, and the insert displacement is immediately forcibly constrained in the initial stage of mold opening, so that the insert body 1 and the casting are instantly separated. This mechanism effectively avoids the deformation or abnormal displacement of the insert body 1 caused by continuous tension during the mold opening process by physically blocking the path of the insert body 1 moving synchronously with the moving mold, and ensures that the parting action is completed first in the critical sticking stage.

[0024] Please see Figures 1-4 In this embodiment, the limiting step 3 extends continuously along the top edge of the insert body 1 to form a closed-loop structure. The limiting step 3 is used to evenly distribute the mold opening pull force. By adopting the limiting step 3 with a closed-loop layout, the limiting reliability can be enhanced. The stepped surface of the limiting step 3 is an inclined guide surface. The inclined direction of the inclined guide surface of the limiting step 3 is at an acute angle to the mold opening direction. The inclined guide surface of the limiting step 3 is used to guide the separation trajectory of the fixed template and the insert body 1. By adopting the inclined surface design, the vertical separation can be converted into an inclined displacement, reducing the wear of the contact surface. The side wall of the insert body 1 is provided with a guide groove 4. The guide groove 4 slides with the guide block of the moving mold. The guide groove 4 is used to constrain the movement path of the insert body 1. By setting the guide groove 4, the lateral offset can be avoided, which can cause the limiting step 3 and the fixed template to misalign, ensuring the fitting accuracy.

[0025] Please see Figures 1-5 In this embodiment, a separation hole 5 is provided on the demolding side of the molding part 2. The separation hole 5 is inverted conical and is used to reduce the adsorption area between the product and the molding part 2. By setting the separation hole 5, the adhesion strength can be weakened. A limit block 6 is provided at the bottom of the insert body 1. The limit block 6 cooperates with the moving mold base. By setting the limit block 6, the gap between the limit step 3 and the fixed mold plate can be kept constant before each mold opening. A cooling water channel 7 is provided inside the insert body 1. The inlet and outlet of the cooling water channel 7 extend to the top end face of the insert body 1. The cooling water channel 7 is used to connect with the external cooling pipe of the mold. By setting the cooling water channel 7, the coolant flows through the core area of ​​the insert body 1 and carries away the heat, eliminating the risk of high temperature softening of the casting and aggravating adhesion.

[0026] During operation, the limiting step 3 at the top of the insert body 1 cooperates with the fixed template step at the moment of mold opening to achieve rigid stop, forcing the casting to separate quickly from the forming part 2. The limiting step 3 in a coordinated closed loop evenly disperses the tensile force, the inclined guide surface transforms the impact into oblique sliding, the guide groove 4 suppresses the horizontal displacement of the insert and ensures the reliability of the blocking, the synchronous inverted conical separation hole 5 weakens the adhesion force of the casting, the cooling water channel 7 suppresses high temperature softening and reduces the risk of mold pulling, and the limiting block 6 locks the reset accuracy, forming a mold pulling closed loop mechanism.

[0027] Through the above steps, a limiting step 3 is designed on the top of the insert body 1, which forms a rigid interference fit with the stepped structure of the bottom surface of the fixed template. When the mold is opened, the bottom surface of the fixed template will immediately contact and lock with the limiting step 3, thereby forcibly preventing the insert body 1 from continuing to move with the moving mold in the early stage of mold opening. This mechanical blocking method ensures that the insert body 1 and the casting are quickly separated at the moment of mold opening, improving the stability and reliability of mold opening. This solves the problem that when the existing automotive gearbox mold is opened, the forming insert is easily pulled upward by the adhesion force of the casting, resulting in the casting being damaged and scrapped.

Claims

1. An anti-pull mold insert for an automotive gearbox mold, comprising an insert body (1); characterized in that: It also includes a limiting step (3). The side wall of the insert body (1) is provided with a forming part (2). The forming part (2) is fixedly connected to the insert body (1). The top of the insert body (1) is equipped with a limiting step (3). When the mold is opened, the limiting step (3) cooperates with the bottom step of the mold positioning plate. The limiting step (3) is used to limit the insert body (1) from moving upward with the moving mold in the early stage of mold opening.

2. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: The limiting step (3) extends continuously along the top edge of the insert body (1) to form a closed loop structure. The limiting step (3) is used to evenly distribute the mold opening pull force.

3. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: The stepped surface of the limiting step (3) is an inclined guide surface. The inclined direction of the inclined guide surface of the limiting step (3) is at an acute angle to the mold opening direction. The inclined guide surface of the limiting step (3) is used to guide the separation trajectory of the fixed template and the insert body (1).

4. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: The side wall of the insert body (1) is provided with a guide groove (4), which slides in conjunction with the guide block of the moving mold. The guide groove (4) is used to constrain the movement path of the insert body (1).

5. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: The demolding side of the molding part (2) is provided with a separation hole (5). The separation hole (5) is an inverted cone shape. The separation hole (5) is used to reduce the adsorption area between the product and the molding part (2).

6. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: A limiting block (6) is provided at the bottom of the insert body (1), and the limiting block (6) cooperates with the moving mold base.

7. The anti-pull mold insert for an automotive gearbox mold according to claim 1, characterized in that: The interior of the insert body (1) is provided with a cooling water channel (7). The inlet and outlet of the cooling water channel (7) extend to the top end face of the insert body (1) respectively. The cooling water channel (7) is used to connect with the external cooling pipe of the mold.

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