Secondary ejection injection mold for automobile tailgate based on tunnel core pulling

Abstract

This utility model provides a secondary ejection injection mold for a car tailgate based on tunnel core pulling, including a lower fixed plate and an upper fixed plate. Two support plates are fixedly installed on both sides of the bottom end of the lower fixed plate, and a lower mold base is fixedly installed on the top of the two support plates. An upper mold base adapted to the lower mold base is fixedly installed at the bottom end of the upper fixed plate. A lower mold core is fixedly installed inside the lower mold base. Multiple movable central inserts are equidistantly arranged in the middle of the lower mold core, and multiple movable oblique inserts are equidistantly embedded on both sides of the lower mold core. This utility model's car tailgate injection mold achieves primary demolding through the cooperation of the central inserts and oblique inserts. The oblique inserts enable secondary demolding through the central inserts. Simultaneously, the locking module enables the separation of the core-pulling block from the formed car tailgate, ensuring both the demolding efficiency and the precision of the car tailgate product.

Description

Technical Field

[0001] This utility model belongs to the field of automobile tailgate processing technology, and relates to a secondary ejection automobile tailgate injection mold based on tunnel core pulling. Background Technology

[0002] The tailgate is an important component of automobile parts. The back panel of the tailgate is generally made of plastic and is usually manufactured using injection molds.

[0003] Traditional automotive tailgate injection molds primarily use ejector pins for demolding during the manufacturing process. However, due to the irregular shape of the tailgate, ejector pin demolding can easily cause deformation of the tailgate structure, affecting its precision and thus impacting assembly. To address this issue, we designed a secondary ejection automotive tailgate injection mold based on tunnel core pulling to solve the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a secondary ejection injection mold for automobile tailgates based on tunnel core pulling, so as to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solution: a secondary ejection injection mold for a car tailgate based on tunnel core pulling, comprising a lower fixed plate and an upper fixed plate. Two support plates are fixedly installed on both sides of the bottom end of the lower fixed plate, and a lower mold base is fixedly installed on the top of the two support plates. An upper mold base adapted to the lower mold base is fixedly provided at the bottom end of the upper fixed plate. A lower mold core is fixedly provided inside the lower mold base. Multiple movable central inserts are equidistantly provided in the middle of the lower mold core. Multiple movable oblique inserts are equidistantly embedded on both sides of the lower mold core. An upper mold core is fixedly provided inside the upper mold base, and movable core-pulling blocks are embedded on both sides inside the upper mold core.

[0006] In the above-mentioned secondary ejection car tailgate injection mold based on tunnel core pulling, an electric push rod is fixedly installed in the middle of the top of the lower fixed plate, an ejector pin is fixedly installed at the telescopic end of the electric push rod, the top of the ejector pin is fixedly connected to the bottom of the middle insert, a stroke controller is fixedly provided on the side of the lower mold base, and the electric push rod is electrically connected to the stroke controller.

[0007] In the above-mentioned secondary ejection car tailgate injection mold based on tunnel core pulling, inclined bases are fixedly installed between the two sides of the lower fixed plate and the support plate, and inclined push rods are fixedly hinged to the top of the two inclined bases. The top of the inclined push rods is hinged to the bottom of the inclined insert.

[0008] In the above-mentioned secondary ejection car tailgate injection mold based on tunnel core pulling, two side blocks are fixedly provided on one side of the upper mold base, and a side mounting plate is fixedly installed between the two side blocks. An electric cylinder is fixedly installed in the middle of the side of the side mounting plate, and a connecting rod is fixedly installed at the telescopic end of the electric cylinder. Core pulling blocks are embedded in both sides of the interior of the upper mold core, and the connecting rod passes through the upper mold base and is fixedly connected to the top of the core pulling block.

[0009] In the above-mentioned secondary ejection car tailgate injection mold based on tunnel core pulling, the upper mold base is fixedly provided with upper locking modules on both sides of the bottom, and the lower mold base is fixedly provided with lower locking modules on both sides of the top. The upper locking modules are locked and fixed with the corresponding lower locking modules.

[0010] In the above-mentioned secondary ejection car tailgate injection mold based on tunnel core pulling, a glue inlet is fixedly provided at the center of the top of the upper fixed plate. The glue inlet is connected to the glue inlet channel of the upper mold base. U-shaped mounting grooves are provided on both sides of the upper fixed plate and the lower fixed plate.

[0011] Compared with the prior art, the advantages of this utility model of a secondary ejection car tailgate injection mold based on tunnel core pulling are as follows: the car tailgate injection mold achieves primary demolding through the cooperation of the central insert and the inclined insert, and secondary demolding through the movement of the central insert. At the same time, the core pulling block is separated from the formed car tailgate through the cooperation of the upper core pulling block. This not only ensures the demolding efficiency of the car tailgate, but also ensures the precision of the car tailgate product. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the secondary ejection car tailgate injection mold based on tunnel core pulling of this utility model.

[0013] Figure 2 This is a schematic diagram of the side structure of the secondary ejection injection mold for automobile tailgate based on tunnel core pulling, which is a structural diagram of this utility model.

[0014] Figure 3 This is a top view of the upper mold base of the secondary ejection car tailgate injection mold based on tunnel core pulling, which is a schematic diagram of the present invention.

[0015] Figure 4 This is a bottom view of the upper mold base structure of the secondary ejection car tailgate injection mold based on tunnel core pulling, which is a utility model.

[0016] Figure 5 This is a schematic diagram of the lower mold base structure of the secondary ejection car tailgate injection mold based on tunnel core pulling according to this utility model.

[0017] In the diagram, 1. Lower fixing plate; 2. Support plate; 3. Upper fixing plate; 4. Lower mold base; 5. Upper mold base; 6. Inlet nozzle; 7. Stroke controller; 8. Side mounting plate; 9. Slanted base; 10. Side block; 11. U-shaped mounting groove; 12. Upper locking module; 13. Lower locking module; 14. Electric push rod; 15. Slanted ejector rod; 16. Ejector pin; 17. Upper mold core; 18. Core pulling block; 19. Lower mold core; 20. Central insert; 21. Slanted insert. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1-5 As shown, the present invention relates to a secondary ejection injection mold for a car tailgate based on tunnel core pulling, comprising a lower fixed plate 1 and an upper fixed plate 3. Two support plates 2 are fixedly installed on both sides of the bottom end of the lower fixed plate 1, and a lower mold base 4 is fixedly installed on the top of the two support plates 2. An upper mold base 5 adapted to the lower mold base 4 is fixedly installed at the bottom end of the upper fixed plate 3. A lower mold core 19 is fixedly installed inside the lower mold base 4. Multiple movable central inserts 20 are equidistantly opened in the middle of the lower mold core 19, and multiple movable oblique inserts 21 are equidistantly embedded on both sides of the lower mold core 19. An upper mold core 17 is fixedly installed inside the upper mold base 5, and movable core-pulling blocks 18 are embedded on both sides inside the upper mold core 17.

[0020] Specifically, the car tailgate injection mold, through the cooperation of the central insert 20 and the oblique insert 21, enables primary demolding through the setting of the oblique insert 21, and secondary demolding through the movement of the central insert 20. At the same time, through the cooperation of the upper core-pulling block 18, the core-pulling block 18 is separated from the formed car tailgate, which not only ensures the demolding efficiency of the car tailgate, but also ensures the precision of the car tailgate product.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this utility model is a secondary ejection car tailgate injection mold based on tunnel core pulling. An electric push rod 14 is fixedly installed in the middle of the top of the lower fixed plate 1. An ejector pin 16 is fixedly installed at the telescopic end of the electric push rod 14. The top of the ejector pin 16 is fixedly connected to the bottom of the middle insert 20. A stroke controller 7 is fixedly provided on the side of the lower mold base 4. The electric push rod 14 is electrically connected to the stroke controller 7.

[0022] Specifically, the molded car tailgate is ejected and demolded by moving the ejector pin 16 and the central insert 20.

[0023] An inclined base 9 is fixedly installed between the two sides of the lower fixed plate 1 and the support plate 2. An inclined top rod 15 is fixedly hinged to the top of the two inclined bases 9. The top of the inclined top rod 15 is hinged to the bottom of the inclined inlay block 21.

[0024] Specifically, by setting the inclined ejector rod 15 and the inclined insert 21, the upper mold base 5 and the lower mold base 4 are separated, so that the inclined insert 21 can move and separate from the product, thus achieving one ejection.

[0025] Two side blocks 10 are fixedly provided on one side of the upper mold base 5. A side mounting plate 8 is fixedly installed between the two side blocks 10. An electric cylinder is fixedly installed in the middle of the side of the side mounting plate 8. A connecting rod is fixedly installed at the telescopic end of the electric cylinder. Core pulling blocks 18 are embedded in both sides of the interior of the upper mold core 17. The connecting rod passes through the upper mold base 5 and is fixedly connected to the top of the core pulling block 18.

[0026] Specifically, the telescopic control of the electric cylinder moves the connecting rod, which pulls the core-pulling block 18 out of the middle of the formed car tailgate, thus realizing the tunnel core-pulling demolding.

[0027] The upper mold base 5 is fixedly provided with upper locking modules 12 on both sides of the bottom, and the lower mold base 4 is fixedly provided with lower locking modules 13 on both sides of the top. The upper locking modules 12 and the corresponding lower locking modules 13 are locked and fixed.

[0028] Specifically, by setting up the lower locking module 13 and the upper locking module 12, the stability of the mold closing can be achieved after the upper mold base 5 and the lower mold base 4 are closed, thereby ensuring the stable forming of the car tailgate.

[0029] A glue inlet 6 is fixedly provided at the center of the top of the upper fixed plate 3. The glue inlet 6 is connected to the glue inlet channel of the upper mold base 5. U-shaped mounting grooves 11 are provided on both sides of the upper fixed plate 3 and the lower fixed plate 1. The U-shaped mounting grooves 11 facilitate the connection between the upper fixed plate 3 and the lower fixed plate 1 and the injection molding machine body.

[0030] Specifically, the injection nozzle 6 allows the injection molding liquid to flow into the mold cavity.

[0031] In specific implementation, when using the car tailgate injection mold, the injection mold is first installed in the injection molding machine. After the car tailgate is injection molded, the core-pulling block 18 is first pulled upward by the electric cylinder. The core-pulling block 18 separates from the top of the molded car tailgate. Then, the lower mold base 4 separates from the upper mold base 5. During the separation process, the inclined insert 21 moves downward and separates from the molded car tailgate. Then, the electric push rod 14 is opened, and the ejector pin 16 is pushed to move by the electric push rod 14. The ejector pin 16 pushes the middle insert 20 to move, which facilitates the demolding of the molded car tailgate and effectively ensures the demolding of the car tailgate and the product accuracy.

[0032] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A secondary ejection injection mold for a car tailgate based on tunnel core extraction, comprising a lower fixed plate (1) and an upper fixed plate (3), wherein two support plates (2) are fixedly installed on both sides of the bottom end of the lower fixed plate (1), and a lower mold base (4) is fixedly installed on the top end of the two support plates (2), and an upper mold base (5) adapted to the lower mold base (4) is fixedly provided at the bottom end of the upper fixed plate (3), characterized in that, The lower mold base (4) is fixedly provided with a lower mold core (19). Multiple movable central inserts (20) are equidistantly provided in the middle of the lower mold core (19). Multiple movable oblique inserts (21) are equidistantly embedded on both sides of the lower mold core (19). The upper mold base (5) is fixedly provided with an upper mold core (17). Movable core-pulling blocks (18) are embedded on both sides of the upper mold core (17).

2. The secondary ejection car tailgate injection mold based on tunnel core pulling according to claim 1, characterized in that, An electric push rod (14) is fixedly installed in the middle of the top of the lower fixed plate (1). An ejector pin (16) is fixedly installed at the telescopic end of the electric push rod (14). The top of the ejector pin (16) is fixedly connected to the bottom of the middle insert (20). A stroke controller (7) is fixedly provided on the side of the lower mold base (4). The electric push rod (14) is electrically connected to the stroke controller (7).

3. The secondary ejection car tailgate injection mold based on tunnel core pulling according to claim 2, characterized in that, An inclined base (9) is fixedly installed between the two sides of the lower fixed plate (1) and the support plate (2). An inclined top rod (15) is fixedly hinged to the top of the two inclined bases (9). The top of the inclined top rod (15) is hinged to the bottom of the inclined inlay (21).

4. The secondary ejection car tailgate injection mold based on tunnel core pulling according to claim 1, characterized in that, Two side blocks (10) are fixedly provided on one side of the upper mold base (5). A side mounting plate (8) is fixedly installed between the two side blocks (10). An electric cylinder is fixedly installed in the middle of the side of the side mounting plate (8). A connecting rod is fixedly installed at the telescopic end of the electric cylinder. Core-pulling blocks (18) are embedded on both sides of the interior of the upper mold core (17). The connecting rod passes through the upper mold base (5) and is fixedly connected to the top of the core-pulling block (18).

5. The secondary ejection car tailgate injection mold based on tunnel core pulling according to claim 4, characterized in that, The upper mold base (5) is fixedly provided with upper locking modules (12) on both sides of the bottom, and the lower mold base (4) is fixedly provided with lower locking modules (13) on both sides of the top. The upper locking modules (12) and the corresponding lower locking modules (13) are locked and fixed.

6. The secondary ejection car tailgate injection mold based on tunnel core pulling according to claim 1, characterized in that, The upper fixing plate (3) is fixedly provided with a glue inlet (6) at the top center. The glue inlet (6) is connected to the glue inlet channel of the upper mold base (5). U-shaped mounting grooves (11) are provided on both sides of the upper fixing plate (3) and the lower fixing plate (1).

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