Fixing structure of in-mold molding plastic part

Abstract

The utility model discloses a fixing structure of an in-mold molding plastic part, which comprises a first insert and a second insert which are arranged in a plastic mold, a fixing groove is arranged on the upper side of the second insert, an elastic sheet is arranged at the bottom of the first insert and extends into the fixing groove, a transition surface is arranged on the inner wall of the middle of the fixing groove, and the transition surface is arranged on the inner wall of the middle of the fixing groove. A protruding block is fixedly connected to the bottom of the elastic piece and located in the transition face, a pressing block is fixedly connected to the bottom of the first insert, the pressing block is in sliding fit with the fixing groove, an installation groove is formed in the pressing block, a fixing block is installed at the upper end of the installation groove, and a spring is fixedly connected to the bottom of the fixing block. When the pressing block moves to the bottom of the fixing groove, the protruding block on the elastic piece enters the transition face at the same time, when the elastic piece initially enters the fixing groove, the elastic piece is pressed to be bent and generates elastic force, and therefore when the protruding block on the elastic piece enters the transition face, the stability of connection between the first insert and the second insert can be improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a fixing structure for in-mold molded plastic parts. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molds are a processing method used in the mass production of parts, mainly in the industrial field. The injection molding process involves injecting molten material under high pressure into the mold cavity, which then cools and solidifies to obtain the molded product. Based on molding characteristics, injection molds are classified into two types: thermosetting plastic molds and thermoplastic plastic molds.

[0003] In the secondary molding process, the semi-finished products from the primary molding are required to be placed into the mold in a preset manner and position for secondary injection molding. For some implants that are small in size or whose shape is not easy to position directly by insertion, it is often necessary to use inserts set inside the mold to fix the implants before injection molding. However, in the use of existing implant fixing structures, it is difficult for the inserts to be accurately and stably connected and combined, resulting in a decrease in the quality of the secondary molded plastic parts and an increase in the probability of defective products. Therefore, this utility model provides a fixing structure for in-mold molded plastic parts. Utility Model Content

[0004] The purpose of this invention is to provide a fixing structure for in-mold molded plastic parts, which has the advantage of being able to easily and accurately and stably connect and combine inserts. This solves the problem that in the use of existing fixing structures for implants, it is difficult to accurately and stably connect and combine inserts, which leads to a decrease in the quality of the finished plastic parts after secondary molding and an increase in the probability of defective products.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixing structure for in-mold molded plastic parts, comprising a first insert and a second insert installed in a plastic mold, the second insert having a fixing groove on its upper side, the first insert having an elastic sheet at its bottom extending into the fixing groove, the fixing groove having a transition surface on its inner wall in the middle, the elastic sheet having a protrusion fixedly connected to its bottom, the protrusion being located in the transition surface, the first insert having a pressure block fixedly connected to its bottom, the pressure block slidingly engaging with the fixing groove, the pressure block having an installation groove, the installation groove having a fixing block installed at its upper end, the fixing block having a spring fixedly connected to its bottom, the spring having a guide block fixedly connected to its bottom, the guide block having a contact block at its lower end, the contact block being located below the pressure block, the second insert having a placement groove on its right side, the placement groove having an implant placed therein, the first insert having a fixing seat at its bottom extending into the placement groove, and a guide mechanism installed between the first insert and the second insert.

[0006] Preferably, the guiding mechanism includes a guide rod and a guide hole. The first insert has a guide hole, and the upper end of the second insert is fixedly connected to the guide rod. The guide rod and the guide hole are slidably connected. The upper end of the guide rod is tapered, with a smaller upper end and a larger lower end. The height of the guide rod is greater than the depth of the fixing groove.

[0007] Preferably, the fixing groove has sliding grooves on both the front and rear sides, and the front and rear ends of the pressure block are inserted into the sliding grooves and slidably connected to the sliding grooves.

[0008] Preferably, the fixing block has an insertion hole in the middle, and the pressing block is equipped with an insertion block, which is inserted into the insertion hole.

[0009] Preferably, a connecting groove is provided on the upper right side of the mounting groove, the connecting groove is connected to the mounting groove, and a connecting block is fixedly connected to the right end of the insert block, the connecting block being fixed in the connecting groove by screws.

[0010] Preferably, a reinforcing block is provided at the upper end of the placement groove, and the reinforcing block is inserted into the implant.

[0011] Preferably, in the fixing groove, the distance between the left and right ends of the fixing groove located on the upper side of the transition surface is greater than the distance between the left and right ends of the fixing groove located on the lower side of the transition surface, and the transition surface is an arc-shaped transition surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In this utility model, through the cooperation of the elastic sheet and the fixing groove, when the pressure block moves to the bottom of the fixing groove, the protrusion on the elastic sheet simultaneously enters the transition surface. When the elastic sheet initially enters the fixing groove, it is bent under pressure and generates elastic force. Thus, when the protrusion on the elastic sheet enters the transition surface, the stability of the connection between the first insert and the second insert can be improved.

[0014] 2. In this utility model, the first insert and the second insert are first guided by a guiding mechanism, and then the pressure block is slidably inserted into the fixing groove to improve the accuracy of the position during connection and avoid misalignment. After the first insert and the second insert are connected, the implant can be effectively fixed.

[0015] 3. A contact block is set at the bottom of the pressure block, and a spring is used for buffering to play a protective role and prevent the pressure block from making direct rigid contact with the second insert when the first insert and the second insert are connected. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a cross-sectional view of the pressing block of this utility model;

[0019] Figure 4 This is a cross-sectional view of the second insert of this utility model.

[0020] The reference numerals and names in the figure are as follows: 1. First insert; 2. Second insert; 3. Fixing groove; 4. Transition surface; 5. Elastic sheet; 6. Protrusion; 7. Elastic block; 8. Pressure block; 9. Guide hole; 10. Guide rod; 11. Placement groove; 12. Implant; 13. Fixing seat; 14. Reinforcing block; 15. Mounting groove; 16. Spring; 17. Guide block; 18. Contact block; 19. Fixing block; 20. Insertion block; 21. Insertion hole; 22. Connecting block; 23. Connecting groove; 24. Slide groove. Detailed Implementation

[0021] 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.

[0022] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] Please see Figures 1 to 4 This utility model provides an embodiment of a fixing structure for in-mold molded plastic parts, including a first insert 1 and a second insert 2 installed in a plastic mold. The plastic mold is used for molding the plastic parts. A fixing groove 3 is provided on the upper side of the second insert 2. Two elastic sheets 5 are provided at the bottom of the first insert 1, and the elastic sheets 5 extend into the fixing groove 3. A transition surface 4 is provided on the inner wall of the middle part of the fixing groove 3. A protrusion 6 is fixedly connected to the bottom of the elastic sheet 5, and the protrusion 6 is located in the transition surface 4. A pressure block 8 is fixedly connected to the bottom of the first insert 1, and the pressure block 8 is located between the two elastic sheets 5. An elastic block connects the pressure block 8 and the elastic sheets 5. 7. To facilitate the reset of the elastic sheet 5, the pressure block 8 and the fixing groove 3 are slidably engaged. The pressure block 8 has an installation groove 15. A fixing block 19 is installed at the upper end of the installation groove 15. A spring 16 is fixedly connected to the bottom of the fixing block 19. A guide block 17 is fixedly connected to the bottom of the spring 16. A contact block 18 is provided at the lower end of the guide block 17 for easy installation during assembly. The contact block 18 is located on the lower side of the pressure block 8. A placement groove 11 is provided on the right side of the second insert 2. An implant 12 is placed in the placement groove 11. A fixing seat 13 is provided at the bottom of the first insert 1. The fixing seat 13 extends into the placement groove 11. A guide mechanism is installed between the first insert 1 and the second insert 2.

[0025] The guiding mechanism includes a guide rod 10 and a guide hole 9. The first insert 1 has a guide hole 9, and the upper end of the second insert 2 is fixedly connected to the guide rod 10. The guide rod 10 and the guide hole 9 are slidably connected. The upper end of the guide rod 10 is tapered, with a smaller upper end and a larger lower end. The height of the guide rod 10 is greater than the depth of the fixing groove 3.

[0026] The front and rear sides of the fixed groove 3 are provided with sliding grooves 24, and the front and rear ends of the pressure block 8 are inserted into the sliding grooves 24 and slidably connected with the sliding grooves 24.

[0027] The fixing block 19 has an insertion hole 21 in the middle, and the pressure block 8 has an insertion block 20 installed on it. The insertion block 20 is inserted into the insertion hole 21 to fix the fixing block 19.

[0028] A connecting groove 23 is provided on the upper right side of the mounting groove 15. The connecting groove 23 is connected to the mounting groove 15. A connecting block 22 is fixedly connected to the right end of the insert block 20. The connecting block 22 is fixed in the connecting groove 23 by screws, which facilitates installation and disassembly.

[0029] A reinforcing block 14 is provided at the upper end of the placement slot 11. The reinforcing block 14 is inserted into the implant 12 to facilitate the placement and installation of the implant 12.

[0030] In the fixing groove 3, the distance between the left and right ends of the fixing groove 3 located on the upper side of the transition surface 4 is greater than the distance between the left and right ends of the fixing groove 3 located on the lower side of the transition surface 4. The transition surface 4 is an arc-shaped transition surface.

[0031] Working principle: Through the cooperation of the elastic sheet 5 and the fixing groove 3, when the pressure block 8 moves to the bottom of the fixing groove 3, the protrusion 6 on the elastic sheet 5 simultaneously enters the transition surface 4. When the elastic sheet 5 initially enters the fixing groove 3, it is bent under pressure and generates elastic force. Thus, when the protrusion 6 on the elastic sheet 5 enters the transition surface 4, it can improve the stability of the connection between the first insert 1 and the second insert 2. The first insert 1 and the second insert 2 are first guided by the guiding mechanism, and then the pressure block 8 slides into the fixing groove 3, which improves the accuracy of the position during connection and avoids misalignment. After the first insert 1 and the second insert 2 are connected, the implant 12 can be effectively fixed. A contact block 18 is set at the bottom of the pressure block 8 and buffered by the spring 16 to play a protective role and prevent the pressure block 8 from directly and rigidly contacting the second insert 2 when the first insert 1 and the second insert 2 are connected.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fixing structure for an in-mold molded plastic part, comprising a first insert (1) and a second insert (2) installed in a plastic mold, characterized in that: The second insert (2) has a fixing groove (3) on its upper side. The first insert (1) has an elastic piece (5) at its bottom. The elastic piece (5) extends into the fixing groove (3). The inner wall of the fixing groove (3) has a transition surface (4). The bottom of the elastic piece (5) is fixedly connected to a protrusion (6). The protrusion (6) is located in the transition surface (4). The bottom of the first insert (1) is fixedly connected to a pressure block (8). The pressure block (8) and the fixing groove (3) are slidably engaged. The pressure block (8) has an installation groove (15). A fixing block (19) is installed at the upper end of the installation groove (15). A spring (16) is fixedly connected to the bottom of the fixing block (19), and a guide block (17) is fixedly connected to the bottom of the spring (16). A contact block (18) is provided at the lower end of the guide block (17). The contact block (18) is located on the lower side of the pressure block (8). A placement groove (11) is provided on the right side of the second insert (2). An implant (12) is placed in the placement groove (11). A fixing seat (13) is provided at the bottom of the first insert (1). The fixing seat (13) extends into the placement groove (11). A guide mechanism is installed between the first insert (1) and the second insert (2).

2. The fixing structure for an in-mold molded plastic part according to claim 1, characterized in that: The guiding mechanism includes a guide rod (10) and a guide hole (9). The first insert (1) has a guide hole (9). The upper end of the second insert (2) is fixedly connected to the guide rod (10). The guide rod (10) and the guide hole (9) are slidably connected. The upper end of the guide rod (10) is tapered with a smaller upper end and a larger lower end. The height of the guide rod (10) is greater than the depth of the fixing groove (3).

3. The fixing structure for an in-mold molded plastic part according to claim 1, characterized in that: The fixed groove (3) has sliding grooves (24) on both the front and rear sides. The pressure block (8) is inserted into the sliding grooves (24) at both the front and rear ends and is slidably connected with the sliding grooves (24).

4. The fixing structure for an in-mold molded plastic part according to claim 1, characterized in that: The fixing block (19) has a socket (21) in the middle, and the pressing block (8) has a plug (20) installed on it. The plug (20) is inserted into the socket (21).

5. The fixing structure for an in-mold molded plastic part according to claim 4, characterized in that: A connecting groove (23) is provided on the upper right side of the mounting groove (15). The connecting groove (23) is connected to the mounting groove (15). A connecting block (22) is fixedly connected to the right end of the insert (20). The connecting block (22) is fixed in the connecting groove (23) by screws.

6. The fixing structure for an in-mold molded plastic part according to claim 1, characterized in that: A reinforcing block (14) is provided at the upper end of the placement groove (11), and the reinforcing block (14) is inserted into the implant (12).

7. The fixing structure for an in-mold molded plastic part according to claim 1, characterized in that: In the fixing groove (3), the distance between the left and right ends of the fixing groove (3) located on the upper side of the transition surface (4) is greater than the distance between the left and right ends of the fixing groove (3) on the lower side of the transition surface (4). The transition surface (4) is an arc-shaped transition surface.

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