Electric car rear handrail injection mold inclined core linkage mechanism

Abstract

The utility model provides a kind of oblique core-pulling linkage mechanism of electric vehicle rear handrail injection mold, belong to mould technical field.It includes upper die plate and lower die plate, the upper die plate and lower die plate between symmetrically provided with two rear handrail forming cavity, the lower die plate downside is provided with ejection mechanism, the left and right sides of the lower die plate symmetrically provided with respectively with two rear handrail forming cavity link's oblique core-pulling linkage mechanism.Mechanism is connected with rear handrail forming cavity through the left and right sides of lower die plate symmetrically provided with oblique core-pulling linkage mechanism, cooperate the setting of upper die plate and lower die plate, without external power drive, the core rod core-pulling action can be realized, reduce the space occupation outside mould.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a slanted core-pulling linkage mechanism for injection molds of electric vehicle rear armrests. Background Technology

[0002] In the injection molding process of electric vehicle rear grab handles, to meet the assembly requirements of the grab handle and the vehicle body, a through-hole mounting hole needs to be formed at a specific location. The spatial layout of this mounting hole dictates that the core rod used to form the hole in the injection mold must be set at a large angle. Because the mounting hole is close to the end of the rear grab handle and needs to penetrate the grab handle body, the outer end of the core rod needs to penetrate deep into the lower mold plate. Its tilt angle often exceeds the effective working range of conventional inclined guide structures such as inclined guide pillars and inclined sliders. Conventional inclined guide structures are limited by the mold's own space and guide stroke, making it difficult to drive the large-angle core rod deeply embedded in the lower mold plate to complete stable core pulling, which easily leads to problems such as core rod jamming, incomplete core pulling, or damage to the molded part. To address this challenge, existing technologies typically employ independent core-pulling mechanisms driven by external power sources such as cylinders or hydraulic cylinders. These mechanisms use external power to push the core rod, achieving the core-pulling action. However, such externally powered core-pulling mechanisms have significant drawbacks: Firstly, external power components, such as cylinder bodies, hydraulic lines, and solenoid valves, must be installed outside the mold. This not only occupies a large amount of space around the injection molding machine, increasing the difficulty of mold installation and debugging on the injection molding production line, but also easily leads to spatial interference with other equipment on the production line. Secondly, the external power system requires an additional control system and piping, increasing mold manufacturing costs and maintenance complexity. Furthermore, issues such as power delays and pressure fluctuations may affect the core-pulling accuracy and stability, potentially causing quality problems such as flash and diameter deviations in the rear armrest mounting holes, thus reducing the production yield.

[0003] For example, a Chinese patent discloses an injection mold for the rear armrest of an electric vehicle [application number: 202322053308.X], which includes an upper template and a lower template. Two C-shaped molding cavities are symmetrically arranged between the upper template and the lower template. The lower template is provided with an inner snap-fit ​​molding structure connected to the middle of the molding cavity, and the lower template is provided with two outer snap-fit ​​molding structures respectively connected to the two ends of the molding cavity. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a slanted core-pulling linkage mechanism for injection molds of electric vehicle rear armrests.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An inclined core-pulling linkage mechanism for an injection mold of an electric vehicle rear armrest includes an upper mold plate and a lower mold plate. Two rear armrest forming cavities are symmetrically arranged between the upper mold plate and the lower mold plate. An ejection mechanism is provided on the lower side of the lower mold plate. Inclined core-pulling linkage mechanisms connected to the two rear armrest forming cavities are symmetrically arranged on the left and right sides of the lower mold plate, respectively.

[0006] In the aforementioned inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest, the inclined core-pulling linkage mechanism includes a recessed groove set on the lower template, the bottom of the recessed groove is inclined, a core rod slide block is slidably connected in the recessed groove, two core rods are provided at the inner end of the core rod slide block and are inclined through the inner wall of the recessed groove and inserted into the rear armrest molding cavity, and also includes a drive slider connected to the core rod slide block through a linkage drive structure, the top end of the drive slider is fixed to the bottom of the upper template.

[0007] In the aforementioned electric vehicle rear armrest injection mold inclined core pulling linkage mechanism, the linkage drive structure includes a push-pull slide groove inclinedly arranged on the inclined surface of the outer end of the core rod slide, and a push-pull slider protruding from the inclined surface of the inner end of the drive slider and inserted into the push-pull slide groove.

[0008] In the aforementioned electric vehicle rear armrest injection mold inclined core pulling linkage mechanism, the cross-sections of the push-pull slider and the push-pull groove are T-shaped.

[0009] In the aforementioned inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest, the outer end face of the drive slider is a vertical plane and the outer end face of the drive slider is flush with the side wall of the lower template.

[0010] In the aforementioned inclined core-pulling linkage mechanism of the electric vehicle rear armrest injection mold, guide post grooves parallel to the bottom of the sinking groove are symmetrically arranged on both sides of the sinking groove, and sliding guide posts inserted into the guide post grooves are symmetrically arranged on both sides of the core rod slide. The sliding guide posts and the core rod slide are integrally formed.

[0011] In the aforementioned inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest, the outer side of the guide post groove penetrates the lower template, and a limit plate is also provided on the outer side of the guide post groove.

[0012] In the aforementioned inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest, the top of the drive slider is provided with a mounting part, which is inserted into the upper template and detachably fixed to the upper template by bolts.

[0013] In the aforementioned electric vehicle rear armrest injection mold inclined core pulling linkage mechanism, the inner end of the core rod slide is also provided with a T-shaped sliding mounting groove, the two sides of the sliding mounting groove penetrate the core rod slide, and the outer end of the core rod is provided with a groove that can form a snap-fit ​​with the sliding mounting groove in the moving direction of the core rod slide.

[0014] In the aforementioned inclined core-pulling linkage mechanism of the electric vehicle rear armrest injection mold, the ejection mechanism includes a top plate disposed on the lower side of the lower template, and a plurality of straight ejector rods are fixedly connected to the top plate, the top ends of the straight ejector rods being connected to the rear armrest molding cavity.

[0015] Compared with existing technologies, the advantages of this utility model are: 1. The mechanism uses symmetrical inclined core-pulling linkage mechanisms connected to the rear armrest forming cavity on both sides of the lower template. With the upper and lower templates, the core rod can be pulled out without external power, reducing the space occupied outside the mold.

[0016] 2. The inclined core-pulling linkage mechanism adopts a design of a recessed groove and a core rod slide block. The drive slider is connected to the core rod slide block through a linkage drive structure, and the top of the drive slider is fixed to the bottom of the upper mold plate. When the lower mold plate and the upper mold plate open and close, the drive slider can be driven to move, and then the core rod slide block can be driven to slide in the recessed groove through the linkage drive structure to realize the core pulling and resetting of the core rod. This structure solves the problem that conventional inclined guide structures are difficult to pull core rods with large inclination angles. No additional external power source is required, which simplifies the mold structure.

[0017] 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

[0018] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a structural diagram of the lower template; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a partial structural diagram of the inclined core-pulling linkage mechanism. Detailed Implementation

[0019] like Figures 1-5 As shown, an inclined core-pulling linkage mechanism for an injection mold of a rear armrest for an electric vehicle includes an upper template 1 and a lower template 2. Two rear armrest forming cavities 3 are symmetrically arranged between the upper template 1 and the lower template 2. An ejection mechanism 4 is provided on the lower side of the lower template 2. Inclined core-pulling linkage mechanisms 5, which are respectively connected to the two rear armrest forming cavities 3, are symmetrically arranged on the left and right sides of the lower template 2.

[0020] In this invention, the mechanism uses symmetrical inclined core-pulling linkage mechanisms connected to the rear armrest forming cavity on both sides of the lower template. With the upper and lower templates, the core rod can be pulled out without external power, reducing the space occupied outside the mold.

[0021] Specifically, the inclined core-pulling linkage mechanism 5 includes a recessed groove 6 set on the lower template 2. The bottom of the recessed groove 6 is inclined. A core rod slide 7 is slidably connected in the recessed groove 6. Two core rods 8 are inclinedly inserted into the inner wall of the recessed groove 6 and inserted into the rear armrest forming cavity 3. It also includes a drive slider 9 connected to the core rod slide 7 through a linkage drive structure. The top of the drive slider 9 is fixed to the bottom of the upper template 1. The inclined core-pulling linkage mechanism adopts a design of recessed groove and core rod slide. The drive slider is connected to the core rod slide through the linkage drive structure, and the top of the drive slider is fixed to the bottom of the upper template. When the lower template and the upper template open and close, the drive slider can be driven to move, thereby driving the core rod slide in the recessed groove through the linkage drive structure to realize the core pulling and resetting of the core rod. This structure solves the problem that conventional inclined guide structures are difficult to pull core rods with large inclination angles. It does not require an additional external power source and simplifies the mold structure.

[0022] Specifically, the linkage drive structure includes a push-pull groove inclinedly disposed on the outer inclined surface of the core rod slide 7, and a push-pull slider 10 protruding from the inner inclined surface of the drive slider 9 and inserted into the push-pull groove. The linkage drive structure utilizes the cooperation between the push-pull groove on the outer inclined surface of the core rod slide and the push-pull slider on the inner inclined surface of the drive slider. By employing the principle of inclined plane transmission, the opening and closing motion of the upper and lower templates is converted into the sliding motion of the core rod slide, thus realizing the core-pulling action. This design ensures smooth transmission, guarantees the accuracy of the core-pulling process, and solves the problem of complex transmission in traditional core-pulling mechanisms.

[0023] Specifically, the cross-sections of the push-pull slider 10 and the push-pull groove are T-shaped. The T-shaped cross-sections of the push-pull slider and the push-pull groove make the fit between the two more stable and less likely to disengage during transmission, thus enhancing the reliability of the linkage drive structure. This design ensures the stability of the core rod slide during the sliding process and avoids core pulling failure caused by the push-pull slider disengaging from the groove.

[0024] Specifically, the outer end face of the drive slider 9 is a vertical plane and flush with the side wall of the lower template 2. This design reduces the space occupied by the drive slider on the outside of the mold, making the overall mold structure more compact. This design solves the problem of excessive space occupation by externally driven core-pulling mechanisms and improves the space utilization rate of the mold during installation and use.

[0025] Specifically, guide post grooves 11 parallel to the bottom of the sinking groove 6 are symmetrically arranged on both sides of the sinking groove 6. Sliding guide posts 12 inserted into the guide post grooves 11 are symmetrically arranged on both sides of the core rod slide 7. The sliding guide posts 12 and the core rod slide 7 are integrally formed. The guide post grooves on both sides of the sinking groove cooperate with the sliding guide posts on both sides of the core rod slide, and the sliding guide posts are integrally formed with the core rod slide, providing precise guidance for the sliding of the core rod slide and ensuring stable movement of the core rod slide along the set direction. This design improves the accuracy of core rod extraction, avoids core rod deviation during extraction, and ensures the forming quality of the rear handrail mounting hole.

[0026] Specifically, the guide post groove 11 extends through the lower template 2 on its outer side, and a limiting plate 13 is also provided on the outer side of the guide post groove 11. The limiting plate, which extends through the lower template and limits the sliding stroke of the sliding guide post, controls the movement distance of the core rod slide and prevents damage to the core rod slide due to excessive sliding. This design ensures the safety and reliability of the core rod pulling process and extends the service life of the mold.

[0027] Specifically, the top of the drive slider 9 has a protruding mounting part 14, which is inserted into the upper template 1 and detachably fixed to the upper template 1 by bolts. The mounting part at the top of the drive slider is inserted into the upper template and detachably fixed by bolts, which facilitates the installation, disassembly and replacement of the drive slider. This design simplifies the maintenance process of the drive slider. When the drive slider is worn or damaged, it can be quickly replaced, thus improving the maintenance efficiency of the mold.

[0028] Specifically, the inner end of the core rod slide 7 is also provided with a T-shaped sliding mounting groove 15. The sliding mounting groove 15 extends through the core rod slide 7 on both sides. The outer side of the core rod 8 is provided with a groove that can engage with the sliding mounting groove 15 in the moving direction of the core rod slide 7. The T-shaped sliding mounting groove at the inner end of the core rod slide and the groove on the outer side of the core rod engage with each other, achieving a stable connection between the core rod and the core rod slide, and facilitating the installation and replacement of the core rod. This design ensures that the core rod moves synchronously with the core rod slide during the core pulling process, and also facilitates the replacement of the corresponding core rod according to different specifications of the rear armrest mounting holes, enhancing the versatility of the mold.

[0029] Specifically, the ejection mechanism 4 includes a top plate 16 disposed on the lower side of the lower mold plate 2. Several straight ejector rods 17 are fixedly connected to the top plate 16, and the top ends of the straight ejector rods 17 are connected to the rear handrail molding cavity 3. The ejection mechanism is connected to the rear handrail molding cavity via the straight ejector rods on the top plate. After injection molding, the molded rear handrail can be ejected from the molding cavity, achieving automatic demolding of the rear handrail. This design improves the demolding efficiency of the rear handrail, avoids damage to the rear handrail that may be caused by manual demolding, and ensures product quality.

[0030] The working principle of this utility model is as follows: the mechanism is equipped with inclined core-pulling linkage mechanisms connected to the rear armrest forming cavity symmetrically arranged on the left and right sides of the lower template. With the arrangement of the upper and lower templates, the core rod can be pulled out without external power drive, reducing the space occupied outside the mold. The inclined core-pulling linkage mechanism adopts a design of a recessed groove and a core rod slide block. The drive slider is connected to the core rod slide block through a linkage drive structure, and the top of the drive slider is fixed to the bottom of the upper mold. When the lower mold and the upper mold open and close, the drive slider can be driven to move, and then the core rod slide block is driven to slide in the recessed groove through the linkage drive structure, realizing the core pulling and resetting of the core rod. This structure solves the problem that conventional inclined guide structures are difficult to pull core rods with large inclination angles. No additional external power source is required, simplifying the mold structure. The linkage drive structure uses a push-pull groove on the inclined surface of the outer end of the core rod slide block and a push-pull slider on the inclined surface of the inner end of the drive slider to cooperate. Using the inclined plane transmission principle, the opening and closing motion of the upper and lower molds is converted into the sliding motion of the core rod slide block, realizing the core pulling action of the core rod. The cross-section of the push-pull slider and the push-pull groove is T-shaped, making the cooperation between the two more stable and less likely to disengage during transmission, thus enhancing the reliability of the linkage drive structure. The outer end face of the drive slider is a vertical plane and flush with the side wall of the lower template, which reduces the space occupied by the drive slider on the outside of the mold and makes the overall structure of the mold more compact. The guide post grooves on both sides of the sinker groove cooperate with the sliding guide posts on both sides of the core rod slide, and the sliding guide posts and the core rod slide are integrally formed, providing precise guidance for the sliding of the core rod slide and ensuring that the core rod slide moves stably in the set direction. The outer side of the guide post groove penetrates the lower template and is equipped with a limiting plate. The limiting plate can limit the sliding stroke of the sliding guide post, thereby controlling the moving distance of the core rod slide and preventing the core rod slide from being damaged due to excessive sliding. The mounting part at the top of the drive slider is inserted into the upper template and fixed detachably with bolts, which facilitates the installation, disassembly and replacement of the drive slider. The T-shaped sliding mounting groove at the inner end of the core rod slide and the groove on the outer side of the core rod engage with each other, realizing a stable connection between the core rod and the core rod slide, and facilitating the installation and replacement of the core rod. The ejection mechanism is connected to the rear handrail molding cavity through the straight ejector rod on the top plate. After injection molding is completed, the molded rear handrail can be ejected from the molding cavity to realize the automatic demolding of the rear handrail.

[0031] 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 slanted core-pulling linkage mechanism for an injection mold of a rear armrest for an electric vehicle, comprising an upper template (1) and a lower template (2), characterized in that, Two rear armrest forming cavities (3) are symmetrically arranged between the upper template (1) and the lower template (2). An ejection mechanism (4) is provided on the lower side of the lower template (2). Inclined core pulling linkage mechanisms (5) that are respectively connected to the two rear armrest forming cavities (3) are symmetrically arranged on the left and right sides of the lower template (2).

2. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 1, characterized in that, The inclined core-pulling linkage mechanism (5) includes a sinking groove (6) set on the lower template (2), the bottom of the sinking groove (6) is inclined, a core rod slide (7) is slidably connected in the sinking groove (6), and two core rods (8) are inclined through the inner wall of the sinking groove (6) and inserted into the rear armrest forming cavity (3) at the inner end of the core rod slide (7). It also includes a drive slider (9) connected to the core rod slide (7) through a linkage drive structure, and the top of the drive slider (9) is fixed to the bottom of the upper template (1).

3. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 2, characterized in that, The linkage drive structure includes a push-pull groove that is inclinedly arranged on the outer end inclined surface of the core rod slide (7), and a push-pull slider (10) that is inserted into the push-pull groove is protruding from the inner end inclined surface of the drive slider (9).

4. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 3, characterized in that, The cross-section of the push-pull slider (10) and the push-pull groove is T-shaped.

5. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 3, characterized in that, The outer end face of the driving slider (9) is a vertical plane and the outer end face of the driving slider (9) is flush with the side wall of the lower template (2).

6. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 3, characterized in that, The sinking trough (6) is symmetrically provided with guide column grooves (11) parallel to the bottom of the sinking trough (6) on both sides, and the core rod slide (7) is symmetrically provided with sliding guide columns (12) inserted into the guide column grooves (11) on both sides. The sliding guide columns (12) and the core rod slide (7) are integrally formed.

7. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 6, characterized in that, The guide post groove (11) extends through the lower template (2) on the outside, and a limit plate (13) is also provided on the outside of the guide post groove (11).

8. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 6, characterized in that, The top of the drive slider (9) is provided with a mounting part (14), which is inserted into the upper template (1) and detachably fixed to the upper template (1) by bolts.

9. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 3, characterized in that, The inner end of the core rod slide (7) is also provided with a sliding mounting groove (15) with a T-shaped cross section. The sliding mounting groove (15) passes through the core rod slide (7) on both sides. The outer side of the core rod (8) is provided with a groove that can form a snap-fit ​​with the sliding mounting groove (15) in the moving direction of the core rod slide (7).

10. The inclined core-pulling linkage mechanism for the injection mold of the electric vehicle rear armrest according to claim 1, characterized in that, The ejection mechanism (4) includes a top plate (16) set on the lower side of the lower template (2), and a number of straight push rods (17) are fixedly connected to the top plate (16). The top of the straight push rods (17) is connected to the rear armrest forming cavity (3).

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