Die insert pin structure capable of ensuring coaxiality of stepped holes

Abstract

The utility model relates to the technical field of mold parts, and discloses a mold insert pin structure capable of ensuring the coaxiality of a stepped hole, the mold insert pin structure comprises a male insert pin and a female insert pin, the end part of the male insert pin is fixedly provided with a frustum-shaped insertion table, the end part of the female insert pin is fixedly provided with a bearing table, and the bearing table is fixedly provided with a through hole; the inner wall of the bearing table is matched with the inserting table, and buffering mechanisms are arranged on the four inner walls of the bearing table. Friction force generated when the inserting table is inserted into the bearing table can be reduced as much as possible, abrasion generated when the male insert pin and the female insert pin are inserted is effectively reduced, inserting is labor-saving and convenient, the coaxiality of the stepped hole can be improved, meanwhile, deformation of the male insert pin and the female insert pin caused by too large instantaneous inserting force can be prevented, and the use effect is good.

Description

Technical Field

[0001] The present application relates to the technical field of mold parts, and in particular to a mold pin structure capable of ensuring the coaxiality of a step hole. Background Art

[0002] Die-casting molds are important tools used in pressure casting processes to manufacture metal parts and products. In die-casting molds, for the step holes of some products, the step holes need to maintain sufficient coaxiality, and the insert pin is an important component to maintain the coaxiality of the step holes.

[0003] At present, in the die-casting mold, in order to ensure the coaxiality of the step hole, it is necessary to align and join the insert pins of the front and rear molds. For example, the mold insert pin structure that can ensure the coaxiality of the step hole disclosed in the patent publication number CN206643327U includes a front mold insert pin and a rear mold insert pin. The front mold insert pin is installed on the front mold plate and extends downward into the mold cavity. The rear mold insert pin is installed on the rear mold plate and extends upward into the mold cavity. The end of the front mold insert pin is provided with a convex column, and the head of the rear mold insert pin is provided with an embedding groove corresponding to the position of the convex column. The convex column is embedded in the embedding groove, and the bottom surface of the convex column is separated from the bottom surface of the embedding groove.

[0004] Although the pin structure disclosed in the above patent can avoid direct collision between the pins of the front and rear molds, thereby achieving the purpose of preventing deformation, when the front and rear mold pins are connected, wear is likely to occur between the two pins. Under the action of wear, the gap between the two pins increases, which will also affect the coaxiality of the step hole. At the same time, the friction force when the pins are connected is relatively large, which makes the connection of the pins more laborious. Therefore, a mold pin structure that can ensure the coaxiality of the step hole is proposed. Utility Model Content

[0005] The purpose of the present application is to solve the problem in the prior art that when the front and rear mold pins are connected, wear is likely to occur between the two pins. Under the action of wear, the gap between the two pins increases, which will also affect the coaxiality of the step hole. At the same time, the friction force when the pins are connected is large, which makes the connection of the pins more laborious. A mold pin structure that can ensure the coaxiality of the step hole is proposed.

[0006] In order to achieve the above purpose, this application adopts the following technical solutions:

[0007] A mold pin structure capable of ensuring the coaxiality of a step hole comprises a male pin and a female pin, wherein a plug-in platform is fixedly installed at the end of the male pin, and the plug-in platform is in a frustum shape, and a receiving platform is fixedly installed at the end of the female pin, and the inner wall of the receiving platform matches the plug-in platform, and buffer mechanisms are provided on the four inner walls of the receiving platform.

[0008] Preferably, each of the buffer mechanisms comprises a mounting groove opened on the inner wall of the receiving platform, a buffer rubber pad is fixedly mounted on the bottom of the mounting groove, and a movable bar is fixedly mounted on the end surface of the buffer rubber pad.

[0009] Preferably, the four side walls of the docking station are each provided with a plurality of ball grooves, and a ball is rotatably arranged inside each ball groove.

[0010] Preferably, an upper end of the side wall of each of the movable bars is provided with an inclined groove.

[0011] Preferably, a first gap is provided between the bottom of the plug-in platform and the inner bottom of the receiving platform.

[0012] Preferably, a second space is provided between the top of the receiving platform and the plug-in platform.

[0013] Compared with the prior art, the present application provides a mold pin structure that can ensure the coaxiality of the step hole, and has the following beneficial effects:

[0014] 1. The mold pin structure that can ensure the coaxiality of the step hole can minimize the friction when the plugging platform is plugged into the inside of the receiving platform through the mutual cooperation of the male pin, the female pin, the plugging platform and the receiving platform, and utilizes the frustum-shaped plugging platform design, thereby reducing the wear when the male pin and the female pin are plugged in, and the plugging is labor-saving and convenient, which is conducive to improving the coaxiality of the step hole.

[0015] 2. The mold pin structure that can ensure the coaxiality of the step hole can provide buffering protection when the plug-in platform is inserted into the receiving platform through the buffer mechanism, thereby preventing the male and female pins from being deformed due to excessive instantaneous plug-in force.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present application can minimize the friction when the plug-in platform is plugged into the inside of the receiving platform, effectively reduce the wear of the male and female pins when plugged in, and the plug-in is labor-saving and convenient, which is beneficial to improving the coaxiality of the step hole. At the same time, it can prevent the instantaneous plug-in force from being too large, causing the male and female pins to be deformed, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a mold pin structure that can ensure the coaxiality of a step hole proposed in this application;

[0018] Figure 2 for Figure 1 Schematic diagram of the internal structure of the middle female setting pin;

[0019] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the Zhonggong inlay needle.

[0020] In the figure: 1. Male inlay pin; 2. Female inlay pin; 3. Plug-in platform; 4. Receiver platform; 5. Mounting groove; 6. Buffer rubber pad; 7. Movable bar; 8. Ball groove; 9. Ball; 10. Bevel; 11. First interval; 12. Second interval. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0022] Reference Figure 1-3 A mold pin structure that can ensure the coaxiality of a step hole includes a male pin 1 and a female pin 2. A plug-in platform 3 is fixedly installed at the end of the male pin 1, and the plug-in platform 3 is in a frustum shape. A receiving platform 4 is fixedly installed at the end of the female pin 2. The inner wall of the receiving platform 4 matches the plug-in platform 3, and the four inner walls of the receiving platform 4 are all provided with buffer mechanisms.

[0023] Each buffer mechanism includes an installation groove 5 opened on the inner wall of the receiving platform 4, a buffer rubber pad 6 is fixedly installed at the bottom of the installation groove 5, and a movable bar 7 is fixedly installed on the end face of the buffer rubber pad 6. Through this arrangement, the inserted docking station 3 can be buffered and protected, thereby preventing the male pin 1 or the female pin 2 from being deformed due to excessive instantaneous plugging force. At the same time, it can prevent the convenience of pulling out the docking station 3 from being affected by excessive friction when the docking station 3 is pulled out.

[0024] The four side walls of the docking station 3 are each provided with a plurality of ball grooves 8 , and a ball 9 is rotatably arranged inside each ball groove 8 , and the ball 9 can reduce the friction between the docking station 3 and each movable bar 7 .

[0025] The upper end of the side wall of each movable bar 7 is provided with an inclined groove 10, and the groove 10 can prevent the plug-in platform 3 from colliding with the corner of the movable bar 7 when being inserted.

[0026] A first gap 11 is provided between the bottom of the plug-in platform 3 and the inner bottom of the receiving platform 4. The first gap 11 can prevent the bottom of the plug-in platform 3 and the receiving platform 4 from colliding with each other.

[0027] A second gap 12 is provided between the top of the receiving platform 4 and the plug-in platform 3 , and the second gap 12 can prevent the top of the receiving platform 4 and the plug-in platform 3 from colliding with each other.

[0028] In the present application, during use, when the male inlay pin 1 is engaged with the female inlay pin 2, the male inlay pin 1 drives the docking platform 3 to be inserted into the receiving platform 4. Since the docking platform 3 is in a cone shape, the docking platform 3 will not contact the receiving platform 4 before being inserted into place, and when the male inlay pin 1 and the female inlay pin 2 are to be separated, the docking platform 3 can be immediately separated from the receiving platform 4, thereby effectively reducing wear and friction, which is conducive to docking.

[0029] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and utility model concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A mold pin structure capable of ensuring the coaxiality of a stepped hole, comprising a male pin (1) and a female pin (2), characterized in that: A plugging platform (3) is fixedly mounted on the end of the male insert pin (1), and the plugging platform (3) is in a cone shape. A receiving platform (4) is fixedly mounted on the end of the female insert pin (2), and the inner wall of the receiving platform (4) matches the plugging platform (3). The four inner walls of the receiving platform (4) are all provided with buffer mechanisms.

2. A mold pin-inserting structure capable of ensuring the coaxiality of a step hole according to claim 1, characterized in that: Each of the buffer mechanisms comprises a mounting groove (5) formed on the inner wall of the receiving platform (4), a buffer rubber pad (6) being fixedly mounted on the bottom of the mounting groove (5), and a movable bar (7) being fixedly mounted on the end surface of the buffer rubber pad (6).

3. A mold pin-inserting structure capable of ensuring the coaxiality of a step hole according to claim 1, characterized in that: The four side walls of the docking station (3) are each provided with a plurality of ball grooves (8), and a ball (9) is rotatably arranged inside each ball groove (8).

4. A mold pin-inserting structure capable of ensuring the coaxiality of a stepped hole according to claim 2, characterized in that: The upper end of the side wall of each movable bar (7) is provided with an inclined groove (10).

5. The mold pin-inserting structure capable of ensuring the coaxiality of the step hole according to claim 1, characterized in that: A first space (11) is provided between the bottom of the plug-in platform (3) and the inner bottom of the receiving platform (4).

6. A mold pin-inserting structure capable of ensuring the coaxiality of a step hole according to claim 1, characterized in that: A second space (12) is provided between the top of the receiving platform (4) and the plug-in platform (3).

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