In-mold positioning structure for metal lining of resin product

Abstract

The utility model discloses an in-mold positioning structure of a resin product metal lining, which relates to the technical field of motor processing and is used for fixing the lining and forming an injection molding box body, the injection molding box body is provided with a mounting part matched with the lining, and the in-mold positioning structure is characterized by comprising a movable mold insert connected with a movable mold and a fixed mold insert connected with a fixed mold, the movable mold insert is inserted with a positioning pin, the bottom of the positioning pin penetrates out of the lower end of the movable mold insert, the penetrating-out end of the positioning pin is in interference insertion connection with the lining, the bottom of the positioning pin is located on the inner side of the lining, the upper side of the lining abuts against the movable mold insert, and spaced open grooves are formed in the bottom of the positioning pin in the length direction. Compared with the prior art, the in-mold positioning structure has the advantages that the positioning needle is in interference connection with the lining through the spaced grooves, so that the mounting and fixing stability of the lining is remarkably improved, the risk of mold pressing caused by falling of the lining due to inertia is reduced, and the effect of improving the machining stability is achieved through the in-mold positioning structure of the metal lining of the resin product.

Description

Technical Field

[0001] The utility model relates to the technical field of motor processing, and more specifically to an in-mold positioning structure of a metal bushing of a resin product. Background Art

[0002] During the injection molding process, the motor gearbox needs to be connected with the internal bushing simultaneously, that is, a certain amount of small metal steel columns are added as bushings during the injection molding of the motor gearbox to withstand the pressure of the lock hole screw after the motor gearbox is installed and fixed.

[0003] In the existing injection molding process of the motor gearbox, the metal steel column is mainly placed on the positioning pin of the movable mold bushing by a robot, and then the movable mold side moves and closes the mold with the fixed mold for injection molding.

[0004] However, the existing metal steel column and the bushing positioning pin are clearance-fitted to facilitate the robot to place the metal steel column as the bushing into the mold, and in the process of closing the dynamic mold side of the plastic mold, the bushing will decelerate when approaching the PL surface after the accelerated movement, which will cause the bushing to fall from the bushing positioning pin due to inertia, thereby causing problems with the mold pressing. This affects the production cycle and causes low production efficiency, as well as causes high mold maintenance costs, which needs to be improved. Utility Model Content

[0005] In view of this, the purpose of this application is to provide an in-mold positioning structure for a metal bushing of a resin product, so as to avoid the risk of die pressing and improve processing stability. The specific scheme is as follows:

[0006] An in-mold positioning structure for a metal bushing of a resin product is used to fix the bushing and an injection molding box for molding. The injection molding box is provided with a mounting portion matching the bushing, including a movable mold insert connected to the movable mold and a fixed mold insert connected to the fixed mold. The movable mold insert is plugged with a positioning pin with the bottom protruding from the lower end of the movable mold insert. The protruding end of the positioning pin is interference fit with the bushing, and the bottom is located on the inner side of the bushing. The upper side of the bushing abuts against the movable mold insert, and the bottom of the positioning pin is provided with spaced grooves along the length direction.

[0007] Preferably, the bottom of the positioning pin is provided with an arc-shaped head.

[0008] Preferably: the arc-shaped head includes a small arc surface, an inclined surface and a large arc surface distributed in sequence from bottom to top, the small arc surface is used to guide and pass through the bushing, the inclined surface is used to align and guide the inner side of the bushing to contact the large arc surface, and the large arc surface is used to match and connect with the inner side of the bushing.

[0009] Preferably: the bushing is provided with an outer ring groove and an insert inner groove, the outer ring groove is located on the outer peripheral side wall of the bushing and is matched and connected with the mounting portion, and the insert inner groove is located at the axis and is used for interference connection with the positioning pin.

[0010] Preferably: the top of the fixed mold insert is provided with an abutment groove that abuts and matches the bushing, and the top of the fixed mold insert located outside the abutment groove contacts the lower side of the injection molding box; the bottom of the movable mold insert contacts the upper side of the injection molding box.

[0011] It can be seen from the above scheme that the present application provides an in-mold positioning structure for a metal bushing of a resin product, which enables an interference connection between the positioning pin and the bushing through spaced grooves, thereby significantly improving the installation and fixing stability of the bushing while reducing the risk of the bushing falling due to inertia and causing die pressing, so that the in-mold positioning structure of the metal bushing of the resin product can achieve the effect of improving processing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of this embodiment;

[0013] Figure 2 It is a schematic cross-sectional view of the present embodiment;

[0014] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0015] Figure 4 Schematic diagram of the structure of the positioning pin of this embodiment.

[0016] Explanation of the reference numerals in the accompanying drawings: 1. Injection molding box; 11. Mounting portion; 2. Moving mold insert; 3. Fixed mold insert; 31. Abutment groove; 4. Positioning pin; 41. Spaced slots; 42. Arc-shaped head; 421. Small arc surface; 422. Inclined surface; 423. Large arc surface; 5. Bushing; 51. Outer ring groove; 52. Insert inner groove. DETAILED DESCRIPTION

[0017] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0018] like Figure 1As shown, an in-mold positioning structure of a metal bushing of a resin product is used to fix the bushing 5 and the injection molding box 1. During the injection molding process of the injection molding box 1 between the upper mold and the lower mold with corresponding cavities, the upper mold fixes the bushing 5 and the injection molding box 1 and the bushing 5 are tightly connected to reduce the molding difficulty of the injection molding box 1 with the bushing 5.

[0019] At the same time, in order to solve the problem of the compression mold caused by the bushing 5 falling off from the upper mold due to gravity, as Figure 2 , Figure 3 As shown, a mounting portion 11 matching the bushing 5 is provided on the injection molding box 1, so that during the installation of the injection molding box 1, the bushing 5 located in the mounting portion 11 is subjected to the pressure of the locking screw, thereby avoiding damage to the mounting portion 11 and affecting the installation and fixing stability of the injection molding box 1.

[0020] It should be mentioned that the in-mold positioning structure of the metal bushing of the resin product includes a movable mold insert 2 connected to the movable mold and a fixed mold insert 3 connected to the fixed mold. A positioning pin 4 with its bottom protruding from the lower end of the movable mold insert 2 is inserted on the movable mold insert 2. One end of the positioning pin 4 is inserted with interference fit into the bushing 5, thereby effectively avoiding the problem of relative movement or falling of the bushing 5 due to gravity and inertia, thereby improving the connection and matching accuracy between the bushing 5 and the mounting portion 11, reducing the risk of die pressing and the corresponding mold repair cost, and effectively improving the processing and production efficiency of the injection molding box 1, thereby saving time and improving economic benefits. At the same time, the bottom of the positioning pin 4 is located on the inner side of the bushing 5 to avoid affecting the matching stability when the upper mold insert and the lower mold insert cooperate and complete the molding of the injection molding box 1. The upper side of the bushing 5 abuts against the movable mold insert 2, and the bottom of the locating pin 4 is provided with spaced grooves 41 along the length direction. The locating pin 4 realizes the matching compression and reset pressing function with the bushing 5 through the spaced grooves 41, so that the interaction force between the locating pin 4 and the bushing 5 significantly improves the matching connection stability of the bushing 5 and the locating pin 4.

[0021] like Figure 3 , Figure 4 As shown, an arc-shaped head 42 is provided at the bottom of the positioning pin 4. The arc-shaped head 42 has the effect of reducing the difficulty and accuracy of the positioning pin 4 and the bushing 5 when they are plugged in and out of each other.

[0022] The arc-shaped head 42 includes a small arc surface 421, an inclined surface 422 and a large arc surface 423 which are sequentially distributed from bottom to top. The small arc surface 421 is used to guide and penetrate the bushing 5, the inclined surface 422 is used to align and guide the inner side of the bushing 5 to contact with the large arc surface 423, and the large arc surface 423 is used to match and connect with the inner side of the bushing 5. Therefore, the arc-shaped head 42 reduces the difficulty of matching with the bushing 5 through the small arc surface 421, and then gradually moves to the end of the large arc surface 423 under the guidance of the inclined surface 422, so that when contacting with the large arc surface 423, the positioning pin 4 is compressed and the distance between the corresponding ends of the positioning pin 4 divided into two parts by the spacing slot 41 is gradually reduced, and a corresponding restoring force is formed to press the bushing 5.

[0023] It should be noted that an outer ring groove 51 and an insert inner groove 52 are provided on the bushing 5. The outer ring groove 51 is located on the outer peripheral side wall of the bushing 5 and is matched and connected with the mounting portion 11, so as to prevent the bushing 5 from being separated from the mounting portion 11. The insert inner groove 52 is located at the axis of the bushing 5 and is used for interference connection with the positioning pin 4, so as to improve the matching and fixing stability of the bushing 5 and the positioning pin 4. At the same time, the top of the fixed mold insert 3 is provided with an abutment groove 31 that abuts and matches the bushing 5, and the top of the fixed mold insert 3 located on the outside of the abutment groove 31 contacts the lower side of the injection molding box 1, and the bottom of the movable mold insert 2 contacts the upper side of the injection molding box 1. Therefore, the matching accuracy between the upper mold insert, the mounting portion 11, the positioning pin 4 and the lower mold insert will be significantly improved and the matching difficulty will be effectively reduced, so that the in-mold positioning structure of the metal bushing of the resin product has the effect of avoiding the risk of die pressing and improving the processing stability.

[0024] In summary, the present application provides an in-mold positioning structure for a metal bushing of a resin product, which enables an interference connection between the positioning pin 4 and the bushing 5 through an interval slot 41, thereby significantly improving the installation and fixing stability of the bushing 5 while reducing the risk of the bushing 5 falling due to inertia and causing die pressing, so that the in-mold positioning structure of the metal bushing of a resin product can achieve the effect of improving the processing stability.

[0025] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0026] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0027] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An in-mold positioning structure for a metal bushing of a resin product, used for fixing a bushing (5) and an injection molding box (1) during molding, wherein the injection molding box (1) is provided with a mounting portion (11) matching the bushing (5), characterized in that: The invention comprises a movable mold insert (2) connected to the movable mold and a fixed mold insert (3) connected to the fixed mold, wherein the movable mold insert (2) is plugged with a positioning pin (4) whose bottom protrudes from the lower end of the movable mold insert (2), one end of the positioning pin (4) is interference-fitted with the bushing (5), and the bottom is located on the inner side of the bushing (5), the upper side of the bushing (5) is in contact with the movable mold insert (2), and the bottom of the positioning pin (4) is provided with spaced grooves (41) along the length direction.

2. The in-mold positioning structure of a metal bushing for a resin product according to claim 1, characterized in that: The bottom of the positioning needle (4) is provided with an arc-shaped head (42).

3. The in-mold positioning structure of a metal bushing for a resin product according to claim 2, characterized in that: The arc-shaped head (42) includes a small arc surface (421), an inclined surface (422) and a large arc surface (423) which are sequentially distributed from bottom to top, wherein the small arc surface (421) is used to guide and penetrate the bushing (5), the inclined surface (422) is used to align and guide the inner side of the bushing (5) to contact the large arc surface (423), and the large arc surface (423) is used to match and connect with the inner side of the bushing (5).

4. The in-mold positioning structure of a metal bushing for a resin product according to claim 1, characterized in that: The bushing (5) is provided with an outer ring groove (51) and an insert inner groove (52), wherein the outer ring groove (51) is located on the outer peripheral side wall of the bushing (5) and is matched and connected with the mounting portion (11), and the insert inner groove (52) is located at the axis and is used for interference connection with the positioning needle (4).

5. The in-mold positioning structure of a metal bushing for a resin product according to claim 1, characterized in that: The top of the fixed mold insert (3) is provided with an abutment groove (31) that abuts and matches with the bushing (5), and the top of the fixed mold insert (3) located outside the abutment groove (31) contacts the lower side of the injection molding box (1); the bottom of the movable mold insert (2) contacts the upper side of the injection molding box (1).

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