Automobile invisible door handle injection mold
By designing a support frame and an extended mold, high-precision one-piece molding and non-destructive demolding of automotive concealed door handles were achieved, solving the demolding difficulties and hinge forming problems of existing molds, and improving production efficiency and precision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIJIN PRECISION MOULD (ZHEJIANG) CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-29
AI Technical Summary
Existing injection molds for automotive concealed door handles cannot be demolded quickly, and the slots at the door handle hinges cannot be integrally molded.
The design employs a support frame and an extended mold. The support frame drives the mold to close precisely through upper and lower mold push rods, while the sealing module of the extended mold seals the hinge area during injection molding. During demolding, the finished product is smoothly pulled out through the push rod system, achieving integrated molding and non-destructive demolding.
It improves the precision and efficiency of injection molding production, solves the problems of traditional molds in forming and removing complex curved parts, and is especially suitable for the mass production of high-precision automotive invisible door handles.
Smart Images

Figure CN224296443U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding technology for concealed door handles, and in particular to an injection mold for an automotive concealed door handle. Background Technology
[0002] Car door handles are interior components of automobiles, designed to enhance the grip and are primarily used for opening and closing car doors. With the rapid development of the automotive industry and a supply shortage, the production of automotive parts has become paramount. Accelerating the production of automotive parts is crucial to keeping pace with the current consumption rate. Therefore, this paper proposes an injection mold for the main body of the car door handle to address these issues. However, existing injection molds for concealed car door handles still suffer from problems such as difficulty in rapid demolding and the inability to integrally mold the grooves at the door handle hinge.
[0003] Therefore, it is essential to invent an injection mold for invisible door handles for automobiles. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides an injection mold for automotive concealed door handles, solving the issues of existing injection molds for automotive concealed door handles still exhibiting difficulties in rapid demolding and the inability to integrally form the groove at the door handle hinge. An injection mold for automotive concealed door handles includes a supporting base plate, a supporting frame, an upper mold, a lower mold, a mold guide post, an extension mold, and a finished product. The supporting frame is fixedly mounted on the surface of the supporting base plate, and the upper and lower molds are installed inside the supporting frame. The mold guide post is fixedly mounted below the upper mold and slidably mounted inside the lower mold. The extension mold is fixedly mounted on the outside of the supporting base plate, and the finished product is located between the upper and lower molds.
[0005] The support frame includes a support wall panel, a load-bearing plate, an upper mold push rod, and a lower mold push rod. The support wall panel is fixedly installed on both sides of the surface of the support base plate, and the load-bearing plate is fixedly installed at the upper and lower ends of the support wall panel. The upper mold push rod and the lower mold push rod are fixedly installed on the inner side of the load-bearing plate and are connected to the upper mold and the lower mold, respectively.
[0006] The extension mold includes an extension plate, a positioning plate, an extension mold push rod, a connecting seat, and a sealing module. The extension plate is fixedly installed on the outside of the support base plate, and the positioning plate is fixedly installed on one end of the extension plate. The extension mold push rod is fixedly installed on the inside of the top of the positioning plate, and the connecting seat is fixedly installed on one end of the extension mold push rod. The sealing module is fixedly installed on one side of the connecting seat and slidably installed between the upper mold and the lower mold.
[0007] The support frame is a rectangular steel metal frame, and the support frame can support the upper mold and the lower mold in the middle of the support wall panel through the upper mold push rod and the lower mold push rod inside it; the mold push rod and the lower mold push rod can drive the upper mold and the lower mold to move vertically in a mirror image at the center line of the support frame through their own extension and retraction.
[0008] The sealing module inside the extension mold is made of a stainless steel metal plate, and the sealing module can move horizontally via the extension mold push rod. The sealing module can move between the upper mold and the lower mold. The shape of the sealing module matches the slot at the hinge of the finished product, and the sealing module is locked inside the slot at the hinge of the finished product after the finished product is completed, fixing the position of the finished product. The sealing module can prevent the finished product from being affected by the movement of the upper mold and the lower mold, so that it is suspended in the center position of the support frame, and can be pulled outward by the retraction of the extension mold push rod.
[0009] Compared with the prior art, the present invention has the following beneficial effects:
[0010] The support frame of this invention ensures rigidity and stability during high-pressure injection molding. Its internally symmetrically arranged upper and lower mold push rods drive the upper and lower molds in high-precision mirror motion, forming a dual guiding system with the mold guide pillars to guarantee mold alignment upon closing. The modular design of the frame supports rapid mold changes. Compared to traditional structures, this frame offers increased strength and reduced energy consumption, making it particularly suitable for the high-precision mass production requirements of automotive concealed door handles.
[0011] This utility model's extended mold design precisely seals the hinge groove of the door handle during injection molding using a square sealing module, ensuring complete molding without flash. During demolding, the extended mold push rod, acting in conjunction with the mold, smoothly pulls the molded part directly out of the mold cavity, achieving off-mold removal. This integrated design not only solves the problem of traditional ejector pins damaging the product surface during demolding but also significantly improves molding accuracy through the precise fit between the sealing module and the hinge groove. Compared to traditional structures, this extended mold shortens the production cycle and avoids the common deformation problems encountered when removing complex curved parts, making it particularly suitable for injection molding production of high-precision components such as automotive concealed door handles. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure 2 This is a schematic diagram of the support frame of this utility model.
[0014] Figure 3 This is a schematic diagram of the structure of the extension mold of this utility model.
[0015] In the picture:
[0016] Support base plate 1, support frame 2, support wall panel 21, force plate 22, upper mold push rod 23, lower mold push rod 24, upper mold 3, lower mold 4, mold guide post 5, extension mold 6, extension plate 61, positioning plate 62, extension mold push rod 63, connecting seat 64, sealing module 65, finished product 7. Detailed Implementation
[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0018] As attached Figure 1 To be continued Figure 3 As shown.
[0019] This utility model provides an injection mold for an automotive concealed door handle, comprising a support base plate 1, a support frame 2, an upper mold 3, a lower mold 4, a mold guide post 5, an extension mold 6, and a finished product 7. The support frame 2 is fixedly installed on the surface of the support base plate 1, and the upper mold 3 and lower mold 4 are installed inside the support frame 2. The mold guide post 5 is fixedly installed below the upper mold 3 and slidably installed inside the lower mold 4. The extension mold 6 is fixedly installed on the outside of the support base plate 1, and the finished product 7 is located between the upper mold 3 and the lower mold 4.
[0020] The support frame 2 includes a support wall panel 21, a force-bearing plate 22, an upper mold push rod 23, and a lower mold push rod 24. The support wall panel 21 is fixedly installed on both sides of the surface of the support base plate 1, and the force-bearing plate 22 is fixedly installed on the upper and lower ends of the support wall panel 21. The upper mold push rod 23 and the lower mold push rod 24 are fixedly installed on the inner side of the force-bearing plate 22 and are connected to the upper mold 3 and the lower mold 4.
[0021] The extension mold 6 includes an extension plate 61, a positioning plate 62, an extension mold push rod 63, a connecting seat 64, and a sealing module 65. The extension plate 61 is fixedly installed on the outside of the support base plate 1, and the positioning plate 62 is fixedly installed on one end of the extension plate 61. The extension mold push rod 63 is fixedly installed on the inside of the top of the positioning plate 62, and the connecting seat 64 is fixedly installed on one end of the extension mold push rod 63. The sealing module 65 is fixedly installed on one side of the connecting seat 64 and is slidably installed between the upper mold 3 and the lower mold 4.
[0022] The support frame 2 is a rectangular steel metal frame, and the support frame 2 can support the upper mold 3 and the lower mold 4 in the middle of the support wall plate 21 through the upper mold push rod 23 and the lower mold push rod 24 inside it; the mold push rod 23 and the lower mold push rod 24 can drive the upper mold 3 and the lower mold 4 to move vertically in a mirror image at the center line of the support frame 2 through their own extension and retraction.
[0023] The sealing module 65 inside the extension mold 6 is made of a stainless steel metal plate, and the sealing module 65 can move horizontally via the extension mold push rod 63. The sealing module 65 can move between the upper mold 3 and the lower mold 4. The shape of the sealing module 65 matches the slot at the hinge of the finished product 7, and the sealing module 65 is locked inside the slot at the hinge of the finished product 7 after the finished product 7 is completed, fixing the position of the finished product 7. The sealing module 65 can prevent the finished product 7 from being affected by the movement of the upper mold 3 and the lower mold 4, so that it is suspended in the center position of the support frame 2, and can be pulled outward by the retraction of the extension mold push rod 63.
[0024] The injection mold for automotive concealed door handles employs a precision collaborative working principle: First, the upper mold 3 and lower mold 4 are precisely closed by the upper mold push rod 23 and lower mold push rod 24 within the support frame 2, while the sealing module 65 of the extension mold 6 is inserted into the mold cavity. During the injection molding stage, the sealing module 65 ensures the complete molding of the hinged parts. After cooling, the push rod system drives the upper mold 3 and lower mold 4 to separate, and the extension mold push rod 63 smoothly pulls out the finished product 7, completing the demolding without damage. This design, through the sequential coordination of the support base plate 1, mold guide pillars 5, and various functional modules, achieves high-precision, high-efficiency, and high-quality injection molding production, perfectly solving the technical difficulties of traditional molds in the molding and removal of complex curved parts.
[0025] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. An injection mold for a concealed door handle for automobiles, characterized in that: The product includes a support base plate (1), a support frame (2), an upper mold (3), a lower mold (4), a mold guide post (5), an extension mold (6), and a finished product (7), wherein: the support frame (2) is fixedly installed on the surface of the support base plate (1), and the upper mold (3) and the lower mold (4) are installed inside the support frame (2), the mold guide post (5) is fixedly installed below the upper mold (3) and slidably installed inside the lower mold (4); the extension mold (6) is fixedly installed on the outside of the support base plate (1), and the finished product (7) is located between the upper mold (3) and the lower mold (4).
2. The injection mold for a concealed door handle for automobiles as described in claim 1, characterized in that: The support frame (2) includes a support wall panel (21), a force plate (22), an upper mold push rod (23) and a lower mold push rod (24). The support wall panel (21) is fixedly installed on both sides of the surface of the support base plate (1), and the force plate (22) is fixedly installed on the upper and lower ends of the support wall panel (21). The upper mold push rod (23) and the lower mold push rod (24) are fixedly installed on the inner side of the force plate (22) and connected to the upper mold (3) and the lower mold (4).
3. The injection mold for a concealed door handle for automobiles as described in claim 1, characterized in that: The extension mold (6) includes an extension plate (61), a positioning plate (62), an extension mold push rod (63), a connecting seat (64), and a sealing module (65). The extension plate (61) is fixedly installed on the outside of the support base plate (1), and the positioning plate (62) is fixedly installed on one end of the extension plate (61). The extension mold push rod (63) is fixedly installed on the inside of the top of the positioning plate (62), and the connecting seat (64) is fixedly installed on one end of the extension mold push rod (63). The sealing module (65) is fixedly installed on one side of the connecting seat (64) and slidably installed between the upper mold (3) and the lower mold (4).
4. The injection mold for a concealed door handle for automobiles as described in claim 2, characterized in that: The support frame (2) is a rectangular steel metal frame, and the support frame (2) can support the upper mold (3) and the lower mold (4) in the middle of the support wall plate (21) through the upper mold push rod (23) and the lower mold push rod (24) inside it; the mold push rod (23) and the lower mold push rod (24) can drive the upper mold (3) and the lower mold (4) to move vertically in a mirror image at the center line of the support frame (2) through their own extension and retraction.
5. The injection mold for a concealed door handle for automobiles as described in claim 3, characterized in that: The sealing module (65) inside the extension mold (6) is made of a stainless steel metal plate, and the sealing module (65) can be moved horizontally by the extension mold push rod (63). The sealing module (65) can be moved between the upper mold (3) and the lower mold (4). The shape of the sealing module (65) matches the slot at the hinge of the finished product (7), and the sealing module (65) is stuck inside the slot at the hinge of the finished product (7) after the finished product (7) is completed, fixing the position of the finished product (7). The sealing module (65) can make the finished product (7) unaffected by the movement of the upper mold (3) and the lower mold (4), so that it is suspended in the center position of the support frame (2), and can pull the finished product (7) outward by the retraction of the extension mold push rod (63).