Exhaust structure of injection mold for forming automobile door panel with horn

Abstract

The utility model provides a kind of loudspeaker forming automobile door plate injection mould exhaust structure, belong to mould technical field.It includes male die and female die, the male die and female die between being provided with forming cavity, the female die inside protruding is provided with door plate forming block, the door plate forming block rear side sidewall place has a concave area to door plate forming block center, the concave area place is provided with anti overflow glue exhaust structure.Through setting anti overflow glue exhaust structure in the concave area of door plate door plate forming block, and setting top block lower glue inlet mechanism in remaining three sidewall places, make exhaust position at melt flow end, high-efficiency exhaust and the balance of anti overflow glue are realized, reduce scorching, filling deficiency, weld mark and other forming defects, simultaneously optimize glue inlet mode, make glue hole can be formed in sidewall bottom, reduce the impression of glue hole to product quality, can improve the injection quality of automobile door plate.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an exhaust structure for a horn-shaped automotive door panel injection mold. Background Technology

[0002] Car door panels are generally injection molded using molds. Due to the large size of car door panels, venting during injection is very important to avoid molding defects such as burning, insufficient filling, and weld lines. However, if the venting structure of the existing car door panel mold is designed to be too small, the gas in the cavity will not be able to escape easily. If it is designed to be too large, it will easily cause glue overflow problems.

[0003] For example, a Chinese patent discloses an injection mold for automotive door panel trim [application number: 202020609267.1], which includes a device body, a top plate, and an ejector plate. The upper end of the device body is connected to a moving mold mechanism, and the front end of the moving mold mechanism is connected to a lifting assembly. The lower end of the top plate is connected to a fixed mold mechanism, and the outer side of the fixed mold mechanism is connected to an injection tube. The right end of the moving mold mechanism is connected to a cooling pipe assembly, and the right end of the moving mold mechanism is connected to a hot runner pipe assembly. A limit switch is connected to the outer side of one end of the moving mold mechanism. One end of the limit switch is connected to a connecting rod, and the other end of the connecting rod is connected to a mounting base. A hydraulic cylinder is provided inside the mounting base. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an exhaust structure for a horn-shaped automotive door panel injection mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A venting structure for an injection mold of a horn-shaped automotive door panel includes a punch and a die, with a molding cavity between the punch and the die. A door panel molding block protrudes from the die, and the rear side wall of the door panel molding block has a recessed area towards its center. An anti-overflow venting structure is provided in the recessed area. Top block lower glue injection mechanisms are provided on the other three side walls of the door panel molding block, excluding the side with the recessed area. A top plate is provided at the bottom of the die.

[0007] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the anti-overflow glue venting structure includes a sunken area that extends from one side of the concave area to the other side. When the punch and die are closed, there is a venting gap on the outside of the sunken area.

[0008] In the aforementioned venting structure of the horn-shaped automotive door panel injection mold, an active venting component is also provided in the recessed area.

[0009] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the active venting component includes an venting groove recessed inward in the sinking area, an venting hole is provided through the bottom of the venting groove, and an venting ejector pin is slidably connected in the venting hole and driven to rise and fall by a lifting driver fixed to the bottom of the cavity mold.

[0010] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the top block lower injection mechanism includes several injection top blocks evenly arranged along the outer edges of the three side walls of the door panel forming block, excluding the side where the concave area is located. The inner end of the injection top block is connected to the bottom of the side wall of the door panel forming block. The cavity mold is also provided with an injection channel corresponding to the injection top block. The injection channel is located on the side of the injection top block away from the door panel forming block. The injection top block is provided with a lower injection structure connecting the injection channel and the bottom of the side wall of the door panel forming block. The bottom of the injection top block is connected to the top plate through the first straight push rod.

[0011] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the lower injection structure includes a tunnel-type flow channel set in the injection top block. The injection port of the tunnel-type flow channel is connected to the injection flow channel, and the injection outlet of the tunnel-type flow channel is connected to the bottom of the side wall of the door panel molding block.

[0012] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the bottom of the glue inlet channel is provided with a residual material ejection rod connected to the top plate.

[0013] In the aforementioned venting structure of the horn-shaped automotive door panel injection mold, the door panel forming block is provided with several horn-shaped mechanisms.

[0014] In the above-mentioned venting structure of the horn-shaped automotive door panel injection mold, the horn-shaped mechanism includes a horn-shaped block with a circular cross-section embedded in the door panel forming block, an external ejector assembly is provided on the outer side of the horn-shaped block along the circumferential direction, and a fine ejector pin assembly is provided directly below the horn-shaped block.

[0015] In the aforementioned venting structure of the horn-shaped automotive door panel injection mold, the external ejector assembly includes several inclined ejector blocks and several straight ejector blocks. The inclined ejector blocks are connected to the top plate via inclined ejector rods, and the straight ejector blocks are connected to the top plate via second straight ejector rods. The fine ejector pin assembly includes an ejector pin mounting plate located directly below the horn-shaped block. The top of the ejector pin mounting plate is densely covered with fine ejector pins that vertically penetrate the horn-shaped block. The ejector pin mounting plate is connected to the top plate via a third straight ejector rod.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By setting an anti-overflow venting structure in the recessed area of ​​the door panel molding block and setting a top block under-gluing mechanism on the other three side walls, the venting position is located at the end of the melt flow, achieving a balance between efficient venting and anti-overflow venting. This reduces molding defects such as scorching, insufficient filling, and weld lines. At the same time, the gluing method is optimized so that the gluing gate can be formed at the bottom of the side wall, reducing the impact of the gluing gate on product quality and improving the injection molding quality of automotive door panels.

[0018] 2. The anti-overflow venting structure adopts a sunken area design, extending from one side of the concave area to the other. When the punch and die close, an venting gap is formed on the outside of the sunken area. This structure not only ensures that the gas can be discharged smoothly, but also effectively prevents the overflow problem through reasonable gap design. It solves the problem that traditional venting structures cannot simultaneously achieve venting and anti-overflow, and improves the reliability of the mold.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure at the die cavity;

[0022] Figure 3 This is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the horn forming mechanism;

[0024] Figure 5 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 6 yes Figure 2 Enlarged diagram of point B in the middle. Detailed Implementation

[0026] like Figures 1-6 As shown, a venting structure for an injection mold of a horn-shaped automotive door panel includes a punch 1 and a die 2. A molding cavity is provided between the punch 1 and the die 2. A door panel molding block 3 protrudes from the die 2. The rear side wall of the door panel molding block 3 has a recessed area 4 towards the center of the door panel molding block 3. An anti-overflow venting structure 5 is provided in the recessed area 4. The other three side walls of the door panel molding block 3, excluding the side where the recessed area 4 is located, are provided with a top block lower glue inlet mechanism 6. A top plate 7 is provided at the bottom of the die 2.

[0027] In this invention, by setting an anti-overflow venting structure in the concave area of ​​the door panel molding block and setting a top block under-gluing mechanism on the other three side walls, the venting position is located at the end of the melt flow, achieving a balance between efficient venting and anti-overflow venting. This reduces molding defects such as scorching, insufficient filling, and weld lines. At the same time, the gluing method is optimized so that the gluing gate can be formed at the bottom of the side wall, reducing the impact of the gluing gate on product quality and improving the injection molding quality of automotive door panels.

[0028] Specifically, the anti-overflow venting structure 5 includes a sunken area 8 that extends from one side of the concave area 4 to the other. When the punch 1 and the die 2 are closed, a venting gap is formed on the outer side of the sunken area 8. The anti-overflow venting structure employs a sunken area design, extending from one side of the concave area to the other. When the punch and die are closed, a venting gap is formed on the outer side of the sunken area. This structure ensures that gas can be smoothly discharged, and through a reasonable gap design, effectively prevents overflow venting, solving the problem that traditional venting structures cannot simultaneously address both venting and anti-overflow venting, thus improving the reliability of the mold.

[0029] Preferably, the recessed area 8 is also equipped with an active venting component. The active venting component in the recessed area enhances venting capacity, enabling faster and more thorough removal of gas from the molding cavity, avoiding molding defects caused by gas residue, further improving venting efficiency, and ensuring the quality stability of the automotive door panel injection molding.

[0030] Specifically, the active venting assembly includes an inwardly recessed venting groove 9 within the recessed area 8. A venting hole 10 is perforated at the bottom of the venting groove 9, and a venting ejector pin 11 is slidably connected within the venting hole 10, driven to rise and fall by a lifting driver fixed to the bottom of the mold cavity 2. Through the cooperation of the venting groove, venting hole, and venting ejector pin, the active venting assembly enables the venting ejector pin to move up and down under the drive of the lifting driver, achieving active venting. This design can actively adjust the venting state according to the molding situation, enhancing the controllability of venting, effectively expelling gas while avoiding overflow, solving the problem of low efficiency in passive venting of traditional venting structures, and improving the stability of the injection molding process.

[0031] Those skilled in the art should understand that the lifting drive can be a hydraulic cylinder, a pneumatic cylinder, or a linear motor, etc.

[0032] Specifically, the top block lower glue injection mechanism 6 includes several glue injection top blocks 12 evenly arranged along the outer edges of the three side walls of the door panel forming block 3, excluding the side where the concave area 4 is located. The inner end of the glue injection top block 12 is connected to the bottom of the side wall of the door panel forming block 3. The cavity mold 2 is also provided with a glue injection channel 13 corresponding to the glue injection top block 12. The glue injection channel 13 is located on the side of the glue injection top block 12 away from the door panel forming block 3. The glue injection top block 12 is provided with a lower glue injection structure connecting the glue injection channel 13 and the bottom of the side wall of the door panel forming block 3. The bottom of the glue injection top block 12 is connected to the top plate 7 through the first straight push rod. The bottom-feeding mechanism for the top block sets up a glue-feeding top block on the outer edge of the three side walls of the door panel forming block. Combined with the glue-feeding channel and the bottom-feeding structure, it enables glue to be fed from the bottom, allowing the glue to fill the forming cavity more evenly and reducing the impact of the glue outlet on the surface quality of the product. At the same time, the glue-feeding top block is connected to the top plate through the first straight ejector rod, which facilitates subsequent ejection and improves production efficiency.

[0033] Specifically, the bottom-feed structure includes a tunnel-type flow channel 14 disposed within the top-feed block 12. The inlet of the tunnel-type flow channel 14 is connected to the inlet flow channel 13, and the outlet of the tunnel-type flow channel 14 is connected to the bottom of the side wall of the door panel molding block 3. The bottom-feed structure employs a tunnel-type flow channel, allowing the adhesive to smoothly enter the bottom of the side wall of the door panel molding block from the inlet flow channel through the tunnel-type flow channel. This optimizes the flow path of the adhesive, reduces flow resistance, and makes the adhesive filling more uniform, further reducing molding defects and improving the molding quality of the automotive door panel.

[0034] Specifically, the bottom of the injection channel 13 is equipped with a residual material ejection rod 15 connected to the top plate 7. The residual material ejection rod connected to the top plate at the bottom of the injection channel facilitates the ejection of residual material in the injection channel after injection molding, avoiding residual material residue from affecting the next injection molding, simplifying the cleaning process, shortening the production cycle, and improving the continuous production capacity of the equipment.

[0035] Specifically, the door panel molding block 3 is provided with several horn molding mechanisms 16. The horn molding mechanisms on the door panel molding block can integrally mold the horn structure while the car door panel is being injection molded, eliminating the need for subsequent horn installation, simplifying the production process, improving production efficiency, and ensuring the connection stability between the horn and the door panel.

[0036] Specifically, the horn molding mechanism 16 includes a horn molding block 17 with a circular cross-section, embedded in the door panel molding block 3. An external ejector assembly is circumferentially arranged on the outer side of the horn molding block 17, and a fine ejector pin assembly is arranged directly below the horn molding block 17. The horn molding mechanism, through the cooperation of the horn molding block, the external ejector assembly, and the fine ejector pin assembly, facilitates the smooth ejection of the horn molding portion after injection molding, avoiding damage to the product during ejection, ensuring the integrity and precision of the horn molding structure, and improving product quality.

[0037] Specifically, the external ejection assembly includes several inclined ejector blocks 18 and several straight ejector blocks 19. The inclined ejector blocks 18 are connected to the top plate 7 via inclined ejector rods 20, and the straight ejector blocks 19 are connected to the top plate 7 via second straight ejector rods 21. The fine ejector pin assembly includes an ejector pin mounting plate 22 located directly below the horn-shaped block 17. The top of the ejector pin mounting plate 22 is densely covered with fine ejector pins 23 that vertically penetrate the horn-shaped block 17. The ejector pin mounting plate 22 is connected to the top plate 7 via a third straight ejector rod 24. The external ejection assembly, through the combination of inclined and straight ejector blocks, and the fine ejector pin assembly, through the ejector pin mounting plate and the densely distributed fine ejector pins, achieves precise ejection of the horn-shaped part under the drive of the top plate. This design ensures a uniform distribution of ejection force, avoiding product deformation or damage caused by excessive local force. Simultaneously, the fine ejector pins can penetrate into minute areas, ensuring smooth demolding of the horn-shaped structure, further improving product quality and production efficiency.

[0038] The working principle of this utility model is as follows: by setting an anti-overflow glue venting structure in the concave area of ​​the door panel molding block and setting a top block under-glue injection mechanism in the other three side walls, the venting position is located at the end of the melt flow, which realizes the balance between efficient venting and anti-overflow glue, reduces molding defects such as scorching, insufficient filling, and weld lines, and optimizes the glue injection method so that the glue gate can be formed at the bottom of the side wall, reducing the impact of the glue gate on product quality and improving the injection molding quality of automotive door panels.

[0039] The anti-overflow venting structure adopts a sunken area design, extending from one side of the concave area to the other. When the punch and die close, a venting gap is formed on the outer side of the sunken area. This structure ensures that the gas can be discharged smoothly, and the reasonable gap design effectively prevents the overflow problem. It solves the problem that traditional venting structures cannot simultaneously achieve venting and anti-overflow, and improves the reliability of the mold. An active venting component is set in the sunken area to enhance the venting capacity, which can discharge the gas in the molding cavity more quickly and thoroughly, avoiding molding defects caused by gas residue, further improving venting efficiency, and ensuring the quality stability of automotive door panel injection molding. The active venting component, through the cooperation of venting grooves, venting holes and venting ejector pins, can move the venting ejector pins up and down under the drive of the lifting driver to achieve active venting. This design can actively adjust the venting state according to the molding situation, enhance the controllability of venting, effectively discharge the gas while avoiding the overflow, solve the problem of low efficiency of passive venting in traditional venting structures, and improve the stability of the injection molding process.

[0040] The bottom-feeding mechanism, by setting feeding top blocks on the outer edges of the three side walls of the door panel molding block, and in conjunction with the feeding channel and bottom feeding structure, enables bottom feeding of the glue, allowing the glue to fill the molding cavity more evenly and reducing the impact of the glue gate on the surface quality of the product. At the same time, the feeding top blocks are connected to the top plate through the first ejector rod, facilitating subsequent ejection and improving production efficiency. The bottom feeding structure adopts a tunnel-type flow channel, allowing the glue to smoothly enter the bottom of the side wall of the door panel molding block from the feeding channel, optimizing the flow path of the glue, reducing flow resistance, making the glue filling more even, further reducing molding defects, and improving the molding quality of the automotive door panel. The bottom of the feeding channel is equipped with a residual material ejection rod connected to the top plate, which facilitates the ejection of residual material in the feeding channel after injection molding, avoiding residual material from affecting the next injection molding, simplifying the cleaning process, shortening the production cycle, and improving the continuous production capacity of the equipment.

[0041] Several horn-forming mechanisms are installed on the door panel molding block, enabling the horn structure to be integrally formed during the injection molding of the car door panel. This eliminates the need for subsequent horn installation, simplifies the production process, and improves production efficiency. It also ensures the stability of the connection between the horn and the door panel. The horn-forming mechanism utilizes a combination of horn-forming blocks, external ejection components, and fine ejector pin components. This facilitates the smooth ejection of the horn-forming part after injection molding, avoiding damage to the product during ejection and ensuring the integrity and precision of the horn-forming structure, thus improving product quality. The external ejection component uses a combination of inclined and straight ejector blocks, while the fine ejector pin component uses an ejector pin mounting plate and densely distributed fine ejector pins. Driven by the top plate, it achieves precise ejection of the horn-forming part. This design ensures uniform distribution of ejection force, preventing product deformation or damage caused by excessive localized force. Furthermore, the fine ejector pins can penetrate into minute areas, ensuring smooth demolding of the horn-forming structure, further improving product quality and production efficiency.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model 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 utility model or exceeding the scope defined by the appended claims.

Claims

1. A venting structure for an injection mold of a horn-shaped automotive door panel, comprising a punch (1) and a die (2), characterized in that, A forming cavity is provided between the punch (1) and the die (2). A door panel forming block (3) is protruding from the die (2). The rear side wall of the door panel forming block (3) has a concave area (4) towards the center of the door panel forming block (3). An anti-overflow glue venting structure (5) is provided in the concave area (4). The other three side walls of the door panel forming block (3) except for the side where the concave area (4) is located are provided with a top block lower glue injection mechanism (6). A top plate (7) is provided at the bottom of the die (2).

2. The venting structure of the horn-shaped automotive door panel injection mold according to claim 1, characterized in that, The anti-overflow adhesive venting structure (5) includes a recessed area (8) that extends from one side of the concave area (4) to the other side. When the punch (1) and the die (2) are closed, the outer side of the recessed area (8) has a venting gap.

3. The venting structure of the horn-shaped automotive door panel injection mold according to claim 2, characterized in that, An active exhaust assembly is also provided in the sinking area (8).

4. The venting structure of the horn-shaped automotive door panel injection mold according to claim 3, characterized in that, The active venting assembly includes an venting groove (9) recessed inward in the sinking area (8), and an venting hole (10) is provided through the bottom of the venting groove (9). An venting ejector pin (11) is slidably connected in the venting hole (10) and driven to rise and fall by a lifting driver fixed to the bottom of the die (2).

5. The venting structure of the horn-shaped automotive door panel injection mold according to claim 1, characterized in that, The top block lower glue injection mechanism (6) includes several glue injection top blocks (12) evenly arranged along the outer edges of the three side walls of the door panel forming block (3) except for the side where the concave area (4) is located. The inner end of the glue injection top block (12) is connected to the bottom of the side wall of the door panel forming block (3). The cavity mold (2) is also provided with a glue injection channel (13) corresponding to the glue injection top block (12). The glue injection channel (13) is located on the side of the glue injection top block (12) away from the door panel forming block (3). The glue injection top block (12) is provided with a lower glue injection structure connecting the glue injection channel (13) and the bottom of the side wall of the door panel forming block (3). The bottom of the glue injection top block (12) is connected to the top plate (7) through the first straight push rod.

6. The venting structure of the horn-shaped automotive door panel injection mold according to claim 5, characterized in that, The lower glue inlet structure includes a tunnel-type flow channel (14) set in the glue inlet top block (12). The glue inlet of the tunnel-type flow channel (14) is connected to the glue inlet flow channel (13), and the glue outlet of the tunnel-type flow channel (14) is connected to the bottom of the side wall of the door panel forming block (3).

7. The venting structure of the horn-shaped automotive door panel injection mold according to claim 5, characterized in that, The bottom of the glue inlet channel (13) is provided with a residual material ejection rod (15) connected to the top plate (7).

8. The venting structure of the horn-shaped automotive door panel injection mold according to claim 1, characterized in that, The door panel forming block (3) is provided with several horn forming mechanisms (16).

9. The venting structure of the horn-shaped automotive door panel injection mold according to claim 8, characterized in that, The horn forming mechanism (16) includes a horn forming block (17) embedded in the door panel forming block (3) and having a circular cross-section. An external ejector assembly is provided on the outer side of the horn forming block (17) along the circumferential direction, and a thin ejector assembly is provided directly below the horn forming block (17).

10. The venting structure of the horn-shaped automotive door panel injection mold according to claim 9, characterized in that, The external ejector assembly includes several inclined ejector blocks (18) and several straight ejector blocks (19). The inclined ejector blocks (18) are connected to the top plate (7) via inclined ejector rods (20). The straight ejector blocks (19) are connected to the top plate (7) via second straight ejector rods (21). The fine ejector assembly includes an ejector mounting plate (22) located directly below the horn-shaped block (17). The top of the ejector mounting plate (22) is densely covered with fine ejector pins (23) that vertically penetrate the horn-shaped block (17). The ejector mounting plate (22) is connected to the top plate (7) via a third straight ejector rod (24).

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