Molding and demolding anti-adhesion structure for automotive trim product
The innovative design of a tilted guide hole and sliding block with a top pin mechanism addresses the issue of thin parts sticking in automobile interior molds, ensuring smooth out-molding by guiding and retracting the pin to prevent bending and ensure successful detachment.
Patent Information
- Application Number
- CN202421710988.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Thinner sheet-like parts of automotive interior products are easily stuck to the slider during the molding process, resulting in failure of molding.
The guide hole and push rod are arranged inclined, combined with the design of the thimble and return spring to ensure that the slider moves obliquely along the guide hole. The inner end of the thimble limits the slider to slide inside to avoid bending of the sheet. The return spring to ensure smooth disengagement.
The molding of automobile interior products is smoothly carried out, avoiding adhesion in sheet-like parts, and ensuring that the forming protrusions can be pulled out from the perforation.
Smart Images
Figure CN223099840U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, and particularly relates to an anti-adhesion structure for forming and demolding an automotive interior product. Background Art
[0002] See Figures 1 to 3 , a certain part of the edge of the automotive interior product 3 is a relatively thin sheet part 31. The sheet part 31 is provided with a perforation 311, and the central axis of the perforation 311 is perpendicular to the demolding direction. Therefore, a slider is required to form the perforation 311. During the demolding process in the ideal state (see Figure 4 ), the slider slides along the guiding hole provided in the mold cavity, so that the forming convex part provided on the side of the slider disengages from the perforation 311 of the sheet part 31, and the demolding of the automotive interior product 3 can be realized. However, during the actual demolding process (see Figure 5 ), the perforation 311 of the sheet part 31 and the forming convex part are adhered to each other and cannot be separated from each other. Moreover, because the sheet part 31 is relatively thin and lacks rigidity, the sheet part 31 bends as the slider slides, resulting in demolding failure. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an anti-adhesion structure for forming and demolding an automotive interior product, which can prevent the relatively thin sheet of the automotive interior product from adhering to the slider during the demolding process, thereby avoiding demolding failure.
[0004] To achieve the above purpose, the utility model provides the following technical solution:
[0005] An anti-adhesion structure for forming and demolding an automotive interior product includes a mold cavity. A notch is provided at the edge of the mold cavity. The mold cavity is provided with a guiding hole, and the guiding hole is inclined with respect to the demolding direction. A push rod is slidably connected to the guiding hole. The top end of the push rod is fixedly connected with a slider. A forming convex part is provided on the outer side wall of the slider. The slider is located at the notch. The side wall of the notch is a vertical surface, and the vertical surface is parallel to the sheet part of the product. A counterbore is provided inside the slider. The central axis of the counterbore is perpendicular to the vertical surface. A thimble passes through the counterbore. A limiting edge is provided in the middle section of the thimble. The limiting edge is slidably arranged in the counterbore. The outer end of the thimble can protrude from the outer wall of the slider. A return spring is sleeved on the thimble. The two ends of the return spring respectively abut against the bottom wall of the counterbore and the outer end surface of the limiting edge. A limiting block is fixedly connected at the opening of the counterbore. The inner end of the thimble passes through and is separated from the limiting block. The inner end of the thimble is spherical, and the inner end of the thimble abuts against the vertical surface.
[0006] Specifically, an inner sealant surface is provided at the top side edge of the side wall of the notch. The inner sealant surface is inclined inward along the demolding direction. An outer sealant surface is provided at the top of the inner side wall of the slider. When the bottom wall of the slider abuts against the bottom wall of the notch, the outer sealant surface abuts against the inner sealant surface.
[0007] Specifically, the angle between the inner sealing surface and the demolding direction is 30°-50°.
[0008] Specifically, when the inner end surface of the limiting edge abuts against the limiting block, the outer end of the ejector pin is flush with the outer wall of the slider.
[0009] Specifically, the top wall of the slider is a curved surface, and the curved surface is inclined upward from the outside to the inside.
[0010] Specifically, a positioning step is provided at the bottom of the side wall of the notch, the side wall of the positioning step is a positioning inclined surface, the positioning inclined surface is inclined inward from bottom to top, the shape of the inner side wall of the slider corresponds to the positioning inclined surface, and when the bottom wall of the slider abuts against the bottom wall of the notch, the inner side wall of the slider abuts against the positioning inclined surface.
[0011] Specifically, the included angle between the central axis of the guiding hole and the mold opening direction is 10°-30°.
[0012] Specifically, the forming convex part is arranged at the bottom of the outer side wall of the slider, and the ejector pin penetrates through the middle of the slider.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] During demolding, the push rod pushes the slider forward. During the forward sliding process of the slider, the inner end of the ejector pin is restricted by the vertical surface (the central axis of the counterbore is perpendicular to the vertical surface). Therefore, the ejector pin only slides forward along the vertical surface, while the slider moves obliquely along the direction of the guiding hole (compressing the return spring during the movement). Therefore, the slider slides inward relative to the ejector pin and the sheet part, so as to gradually disengage from the sheet part, and the outer end of the ejector pin always presses against the middle of the sheet part, preventing the sheet part from bending inward, so as to ensure that the forming convex part is smoothly pulled out from the through hole, so as to ensure smooth demolding.
[0015] When the slider moves to the inner end of the ejector pin disengaging from the vertical surface, the limiting edge is pushed and reset by the return spring, so that the ejector pin is reset to its outer end being flush with the outer wall of the slider, avoiding the outer end of the ejector pin from jamming the sheet part, so as to ensure smooth demolding. Description of the Drawings
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.
[0017] Figure 1 It is a combined state view of the mold cavity in the prior art and the automotive interior product;
[0018] Figure 2Side view of an automotive interior product;
[0019] Figure 3 It is Figure 1 The sectional view of the A-A section in
[0020] Figure 4 It is Figure 1 The demolding state of the A-A section structure in under ideal conditions;
[0021] Figure 5 It is Figure 1 The demolding state of the A-A section structure in under actual conditions;
[0022] Figure 6 The sectional view of the present utility model;
[0023] Figure 7 The state view of the present utility model during the demolding process;
[0024] Figure 8 The state view of the present utility model after the demolding is completed.
[0025] In the figure:
[0026] 1. Mold cavity; 11. Notch; 111. Upright surface; 112. Inner sealant surface; 12. Guide hole; 13. Positioning step;
[0027] 21. Push rod; 22. Slide block; 221. Forming convex part; 222. Outer sealant surface; 23. Counterbore; 24. Thimble; 241. Limiting edge; 25. Return spring; 26. Limiting block; 27. Screw;
[0028] 3. Automotive interior product; 31. Flaky part; 311. Perforation. Detailed implementation mode
[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0030] See Figures 6 to 8 , an anti-adhesion structure for the demolding of an automotive interior product, including a mold cavity 1, and a notch 11 is provided at the edge of the mold cavity 1. The mold cavity 1 is provided with a guide hole 12, and the guide hole 12 is inclined with respect to the demolding direction. A push rod 21 is slidably connected to the guide hole 12, the top end of the push rod 21 is fixedly connected with a slide block 22, and a forming convex part 221 is provided on the outer side wall of the slide block 22.
[0031] The slider 22 is located at the notch 11. The side wall of the notch 11 is a vertical surface 111, and the vertical surface 111 is parallel to the sheet portion 31. A counterbore 23 is provided inside the slider 22, and the central axis of the counterbore 23 is perpendicular to the vertical surface 111.
[0032] A ejector pin 24 passes through the counterbore 23. A limiting edge 241 is provided in the middle section of the ejector pin 24, and the limiting edge 241 is slidably disposed in the counterbore 23. The outer end of the ejector pin 24 can protrude from the outer wall of the slider 22. A return spring 25 is sleeved on the ejector pin 24, and the two ends of the return spring 25 respectively abut against the bottom wall of the counterbore 23 and the outer end surface of the limiting edge 241. A limiting block 26 is fixedly connected to the opening of the counterbore 23 by a screw 27, and the inner end of the ejector pin 24 passes through and is connected to the limiting block 26. The inner end of the ejector pin 24 is spherical, and the inner end of the ejector pin 24 abuts against the vertical surface 111.
[0033] Specifically, an inner sealing surface 112 is provided at the top side edge of the side wall of the notch 11, and the inner sealing surface 112 is inclined inward along the mold opening direction. An outer sealing surface 222 is provided at the top of the inner side wall of the slider 22. When the bottom wall of the slider 22 abuts against the bottom wall of the notch 11, the outer sealing surface 222 abuts against the inner sealing surface 112.
[0034] Specifically, the included angle between the inner sealing surface 112 and the mold opening direction is 30° - 50°.
[0035] Specifically, when the inner end surface of the limiting edge 241 abuts against the limiting block 26, the outer end of the ejector pin 24 is flush with the outer wall of the slider 22.
[0036] Specifically, the top wall of the slider 22 is a curved surface, and the curved surface is inclined upward from the outside to the inside.
[0037] Specifically, a positioning step 13 is provided at the bottom of the side wall of the notch 11. The side wall of the positioning step 13 is a positioning inclined surface, and the positioning inclined surface is inclined inward from bottom to top. The shape of the inner side wall of the slider 22 corresponds to that of the positioning inclined surface. When the bottom wall of the slider 22 abuts against the bottom wall of the notch 11, the inner side wall of the slider 22 abuts against the positioning inclined surface.
[0038] Specifically, the included angle between the central axis of the guide hole 12 and the mold opening direction is 10° - 30°.
[0039] Specifically, a forming convex portion 221 is provided at the bottom of the outer side wall of the slider 22, and the ejector pin 24 passes through the middle of the slider 22.
[0040] The working principle of the anti-adhesion structure for the forming and mold opening of the automotive interior product of the present utility model is as follows:
[0041] Combined Figure 6 、 Figure 7, during demolding, the ejector rod 21 pushes the slider 22 forward. During the forward sliding of the slider 22, the inner end of the ejector pin 24 is restricted by the vertical surface 111 (the central axis of the counterbore 23 is perpendicular to the vertical surface 111). Therefore, the ejector pin 24 only slides forward along the vertical surface 111, while the slider 22 moves obliquely along the direction of the guide hole 12 (compressing the return spring 25 during the movement). Therefore, the slider 22 slides inward relative to the ejector pin 24 and the sheet-like portion 31, gradually disengaging from the sheet-like portion 31, and the outer end of the ejector pin 24 always abuts against the middle of the sheet-like portion 31, preventing the sheet-like portion 31 from bending inward, so as to ensure that the formed convex portion 221 is smoothly pulled out from the through hole 311, ensuring smooth demolding.
[0042] When the inner end of the ejector pin 24 disengages from the vertical surface 111 as the slider 22 moves, the limiting edge 241 is pushed by the return spring 25 to reset (as Figure 8 shown), so that the ejector pin 24 resets until its outer end is flush with the outer wall of the slider 22, preventing the outer end of the ejector pin 24 from jamming the sheet-like portion 31, ensuring smooth demolding.
[0043] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. An anti-adhesion structure for a vehicle interior product during molding and demolding, characterized in that: It includes a mold cavity. There is a notch at the edge of the mold cavity. The mold cavity is provided with a guide hole which is inclined with respect to the demolding direction. A push rod is slidably connected to the guide hole. The top end of the push rod is fixedly connected with a slider. A forming convex part is provided on the outer side wall of the slider. The slider is located at the notch. The side wall of the notch is a vertical surface which is parallel to the sheet part of the product. A counterbore is provided inside the slider. The central axis of the counterbore is perpendicular to the vertical surface. A ejector pin passes through the counterbore. A limiting edge is provided in the middle section of the ejector pin. The limiting edge is slidably arranged in the counterbore. The outer end of the ejector pin can protrude from the outer wall of the slider. A return spring is sleeved on the ejector pin. The two ends of the return spring respectively abut against the bottom wall of the counterbore and the outer end face of the limiting edge. A limiting block is fixedly connected at the opening of the counterbore. The inner end of the ejector pin passes through and protrudes from the limiting block. The inner end of the ejector pin is spherical and abuts against the vertical surface.
2. The anti-adhesion structure for the forming and demolding of the automotive interior product according to claim 1, wherein: An inner sealing rubber surface is provided at the top side edge of the side wall of the notch. The inner sealing rubber surface is inclined inward along the demolding direction. An outer sealing rubber surface is provided at the top of the inner side wall of the slider. When the bottom wall of the slider abuts against the bottom wall of the notch, the outer sealing rubber surface abuts against the inner sealing rubber surface.
3. The anti-adhesion structure for the automotive interior product during forming and demolding according to claim 2, characterized in that: The included angle between the inner sealing rubber surface and the demolding direction is 30°-50°.
4. The anti-adhesion structure for the automotive interior product during molding and demolding according to claim 1, characterized in that: When the inner end face of the limiting edge abuts against the limiting block, the outer end of the ejector pin is flush with the outer wall of the slider.
5. The anti-adhesion structure for the forming and demolding of the automotive interior trim product according to claim 1, characterized in that: The top wall of the slider is a curved surface which is inclined upward from outside to inside.
6. The anti-adhesion structure for mold release of the automotive interior product according to claim 1, wherein: A positioning step is provided at the bottom of the side wall of the notch. The side wall of the positioning step is a positioning inclined surface which is inclined inward from bottom to top. The shape of the inner side wall of the slider corresponds to that of the positioning inclined surface. When the bottom wall of the slider abuts against the bottom wall of the notch, the inner side wall of the slider abuts against the positioning inclined surface.
7. The anti-adhesion structure for the automotive interior product during molding and demolding according to claim 1, characterized in that: The included angle between the central axis of the guide hole and the mold opening direction is 10°-30°.
8. The anti-adhesion structure for the forming and demolding of the automotive interior product according to claim 1, characterized in that: The forming convex part is provided at the bottom of the outer side wall of the slider. The ejector pin passes through the middle of the slider.