Injection mold of automobile B column decorative plate

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold for an automobile B-pillar decorative plate, which comprises an injection mold for forming the decorative plate through injection molding, the decorative plate comprises a plate body, a strip-shaped T-shaped mechanism is integrally formed at the bottom, close to one side edge, of the plate body, and a plurality of sets of installing and fixing pieces are integrally formed at the bottom of the plate body. The injection mold comprises a lower mold frame and an upper mold frame which are arranged in an opening and closing mode, an ejector pin mechanism is arranged at the bottom of the lower mold frame, and a kernel containing groove is formed in the center of the top of the lower mold frame. According to the injection mold for the automobile B column decorative plate, the problems that in the prior art, when a decorative plate is subjected to injection molding, due to the fact that the structure is thin and certain curved surfaces and sawteeth exist, when a fixing structure is integrally formed on the decorative plate, a mold core is designed according to the corresponding shape, and the decorative plate is difficult to demold; and if the mold core is subjected to complex design, the decorative plate is very easy to warp and deform.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a B-pillar decorative plate of an automobile. Background Art

[0002] The B-pillar of a car, also known as the center pillar, is a roof support structure located between the front door and the rear door. During the production of the B-pillar, its decorative panel not only protects the seat belts, but also plays a vital role in the strength of the car's side. In the production process of the car's B-pillar decorative panel, direct injection molding is generally used.

[0003] During the injection molding of the automobile B-pillar decorative panel, the panel itself is relatively thin because it is used for decoration. In the prior art, during the injection molding of the decorative panel, due to its thin structure and the presence of certain curved surfaces and serrations, when the fixed structure is integrally formed thereon, the mold core is designed according to the corresponding shape, resulting in difficulty in demolding the decorative panel. If the mold core is complexly designed, the decorative panel will easily warp and deform. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides an injection mold for a decorative panel of a B-pillar of an automobile, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: an injection mold for a car B-pillar decorative plate, comprising: an injection mold for forming the decorative plate by injection molding;

[0006] The decorative plate includes a plate body, a strip T-shaped structure is integrally formed at the bottom of the plate body near one side edge, and a plurality of sets of mounting parts are integrally formed at the bottom of the plate body;

[0007] The injection mold includes a lower mold frame and an upper mold frame that are arranged to open and close. The bottom of the lower mold frame is provided with an ejector mechanism. A core loading groove is provided at the center of the top of the lower mold frame. Two symmetrically arranged lower mold cores are installed inside the core loading groove. A limit rail is installed on one side of the core loading groove. The limit rail is internally slidably connected to the limit mechanism. Sliding molds are installed on the front and back sides of the core loading groove. Positioning holes are provided at the four corners of the top of the lower mold core.

[0008] An embedding module is embedded on the top of the lower mold core.

[0009] Preferably, a plurality of serrations are provided on one side of the slide die located inside the core loading groove, and the serrations on the slide die are adapted to the shape of one side of the T-shaped mechanism.

[0010] Preferably, the lower mold core includes a forming mold, a mold groove of the forming mold is provided with an embedding groove, the embedding module is embedded in the embedding groove, and a toothed mold is integrally provided on the forming mold.

[0011] Preferably, the tail and top of the limiting mechanism are respectively overlapped with and, the tail and top of the limiting mechanism are respectively overlapped with an inclined pressure piece and an inclined guide piece, the inclined pressure piece and the inclined guide piece are both installed on the upper mold frame, and the inclined guide piece is provided with an inclined rod inserted into the limiting mechanism.

[0012] Preferably, the limiting mechanism includes a slider, the front end of the slider is integrally provided with a clamping rod, the clamping rod is embedded in one side of the lower mold core, the side of the slider is provided with a mounting hole, and a spring buckle is installed inside the mounting hole.

[0013] Preferably, the tail end of the slider is arranged in an inclined shape, and a gasket is installed on the inclined surface of the tail end of the slider.

[0014] Preferably, the upper mold frame includes a first frame body, a first mold groove is opened at the center of the bottom of the first frame body, two symmetrically arranged first mold cores are installed inside the first mold groove, six groups of first injection gates are distributed inside the first mold groove, and the six groups of first injection gates are all through-inserted into the first mold core, a first pressing groove is opened at the bottom of the first frame body near one side, and first positioning rods are installed at the four corners of the bottom of the first frame body, and the first positioning rods are plugged into the positioning holes.

[0015] Preferably, the upper mold frame includes a second frame body, a second mold groove is opened at the center of the bottom of the second frame body, two symmetrically arranged second mold cores are installed inside the second mold groove, two groups of second injection gates are distributed inside the second mold groove, and the two groups of second injection gates are respectively embedded in the two second mold cores, a second pressing groove is opened at the bottom of the second frame body near one side, and second positioning rods are installed at the four corners of the bottom of the second frame body, and the second positioning rods are plugged into the positioning holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The injection mold for the automobile B-pillar decorative panel uses a mosaic module and a sliding mold on the lower mold core to cooperate with each other, and the front and back clamping on the lower mold core form a gap for forming a T-shaped structure. After the decorative panel is injection-molded, the sliding mold and the mosaic module are separated in sequence, and the mosaic module, sliding mold and lower mold core are simply assembled to simplify the demolding process, improve the convenience during demolding, and facilitate the demolding of the fixed structure of the decorative panel.

[0018] 2. The injection mold for the automobile B-pillar decorative panel has two different upper mold frames when injecting decorative panels of different thicknesses. Thinner decorative panels use an upper mold frame with multiple sets of sprues, while thicker decorative panels use an upper mold frame with fewer sprues. This achieves the effect of determining the number of sprues according to the thickness of the decorative panel, preventing warping and deformation of the decorative panel during injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model when opening and closing;

[0021] Figure 3 This is a schematic diagram of the structure of the decorative plate of the utility model;

[0022] Figure 4 This is an exploded schematic diagram of the lower mold frame structure of the utility model;

[0023] Figure 5 This is an exploded schematic diagram of the limiting mechanism structure of the utility model;

[0024] Figure 6 This is a schematic diagram of the multi-sprue upper mold frame structure of the utility model;

[0025] Figure 7 This is a schematic diagram of the upper mold frame structure of the utility model with a small injection port.

[0026] In the figure: 1. lower mold frame; 2. upper mold frame; 21. first frame; 22. first mold groove; 23. first pressing groove; 24. first positioning rod; 25. first mold core; 26. first injection gate; 201. second frame; 202. second mold groove; 203. second pressing groove; 204. second positioning rod; 205. second mold core; 206. second injection gate; 3. ejector mechanism; 4. lower mold core; 41. forming mold; 42. embedding groove; 43. toothed mold; 5. limiting mechanism; 51. slider; 52. clamping rod; 53. mounting hole; 54. spring buckle; 55. gasket; 6. decorative panel; 61. plate; 62. T-shaped mechanism; 63. mounting piece; 7. positioning hole; 8. embedding module; 9. sliding mold; 10. limiting frame rail; 11. core mounting groove; 12. inclined pressure piece; 13. inclined guide piece. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-7 , an injection mold for a car B-pillar decorative plate, comprising: an injection mold for injection molding a decorative plate 6;

[0029] The decorative plate 6 includes a plate body 61, a strip T-shaped structure 62 is integrally formed at the bottom of the plate body 61 near one side edge, and a plurality of sets of fixing parts 63 are integrally formed at the bottom of the plate body 61;

[0030] The injection mold includes a lower mold frame 1 and an upper mold frame 2 that are arranged to open and close. A pin mechanism 3 is provided at the bottom of the lower mold frame 1. A core loading groove 11 is provided at the center of the top of the lower mold frame 1. Two symmetrically arranged lower mold cores 4 are installed inside the core loading groove 11. A limit rail 10 is installed on one side of the core loading groove 11. The limit mechanism 5 is slidably connected to the limit rail 10. Sliding molds 9 are installed on the front and back sides of the core loading groove 11. Positioning holes 7 are provided at the four corners of the top of the lower mold core 4.

[0031] An embedding module 8 is embedded on the top of the lower mold core 4.

[0032] Among them, the sliding mold 9 is provided with a plurality of serrations on one side of the core loading groove 11. The serrations on the sliding mold 9 are adapted to the shape of one side of the T-shaped mechanism 62. The serration shape on the sliding mold 9 is used to provide a model for the shape of one side of the T-shaped mechanism 62. After the injection molding is completed, the serrated structure formed on one side of the T-shaped mechanism 62 can be directly exposed by removing the sliding mold 9, which is convenient for the subsequent complete demolding of the decorative panel 6.

[0033] Among them; the lower mold core 4 includes a forming mold 41, and an embedding groove 42 is opened in the mold groove of the forming mold 41. The embedding module 8 is embedded in the inside of the embedding groove 42. A toothed mold 43 is integrally provided on the forming mold 41. The embedding module 8 is positioned therein by using the embedding groove 42. At the same time, the embedding module 8 is pressed against the inner wall of the embedding groove 42 to form a gap with a single-sided bending structure of the T-shaped mechanism 62. During demoulding, the embedding module 8 can be separated from the lower mold core 4 together with the decorative panel 6, and finally completely separated from the T-shaped mechanism 62 on the decorative panel 6, so as to achieve a complete and rapid demoulding effect.

[0034] Among them, the tail and top of the limiting mechanism 5 are respectively overlapped with an inclined pressure piece 12 and an inclined guide piece 13, which are both installed on the upper mold frame 2. The inclined guide piece 13 is provided with an inclined rod inserted into the limiting mechanism 5. As the upper mold frame 2 and the lower mold frame 1 are closed, the inclined pressure piece 12 and the inclined guide piece 13 are pressed against the limiting mechanism 5 accordingly, so that the limiting mechanism 5 is stuck on the side of the lower mold core 4, and the lower mold core 4 is fixed in the core loading groove 11.

[0035] Among them, the limiting mechanism 5 includes a slider 51, and a clamping rod 52 is integrally provided at the front end of the slider 51. The clamping rod 52 is embedded in one side of the lower mold core 4. A mounting hole 53 is opened on the side of the slider 51, and a spring buckle 54 is installed inside the mounting hole 53. In the process of the guide 13 moving downward with the upper mold frame 2, the oblique rod on the guide 13 is directly inserted into the slider 51, prompting the slider 51 to be pushed, and the clamping rod 52 is clamped on the lower mold core 4. At the same time, the spring buckle 54 is clamped in front of the oblique rod of the guide 13. After the upper mold frame 2 and the lower mold frame 1 are completely closed, the oblique rod of the guide 13 is used to push the spring buckle 54 to ensure that there is no gap at the clamping point between the clamping rod 52 and the lower mold core 4.

[0036] Among them; the tail end of the slider 51 is arranged in an inclined shape, and a gasket 55 is installed on the inclined surface of the tail end of the slider 51. The gasket 55 is used as the contact point of the tail end of the slider 51. When the oblique pressure member 12 is fully pressed down, the friction force of the oblique pressure member 12 is borne by the gasket 55, thereby avoiding wear of the tail end of the slider 51.

[0037] Embodiment 1, wherein; the upper mold frame 2 includes a first frame body 21, a first mold groove 22 is opened at the center of the bottom of the first frame body 21, two symmetrically arranged first mold cores 25 are installed inside the first mold groove 22, six groups of first injection gates 26 are distributed inside the first mold groove 22, and the six groups of first injection gates 26 are all through-inserted into the first mold core 25, a first pressing groove 23 is opened at the bottom of the first frame body 21 near one side, and first positioning rods 24 are installed at the four corners of the bottom of the first frame body 21, and the first positioning rods 24 are plugged into the positioning holes 7. When injecting a decorative panel 6 with a thinner thickness, the upper mold frame 2 with six groups of first injection gates 26 is used. During the injection molding process, the material flow distance can be effectively reduced, the material flow time can be reduced, and the internal stress can be reduced, thereby preventing the decorative panel 6 from warping and deformation during injection molding.

[0038] Embodiment 2, wherein; the upper mold frame 2 includes a second frame body 201, a second mold groove 202 is opened at the center of the bottom of the second frame body 201, two symmetrically arranged second mold cores 205 are installed inside the second mold groove 202, two groups of second injection gates 206 are distributed inside the second mold groove 202, and the two groups of second injection gates 206 are respectively through-engaged in the two second mold cores 205, a second pressing groove 203 is opened at the bottom of the second frame body 201 near one side, and second positioning rods 204 are installed at the four corners of the bottom of the second frame body 201, and the second positioning rods 204 are plugged into the positioning holes 7. When facing the injection molding of a thicker decorative panel 6, there is a sufficiently large gap between the upper mold frame 2 and the lower mold frame 1, and there is sufficient space for material flow, and thus the use of the upper mold frame 2 with two groups of second injection gates 206 will not affect the flow of the material.

[0039] Working principle: when the decorative panel 6 needs to be injection molded, first confirm the thickness of the decorative panel 6 and select the corresponding upper mold frame 2. After the installation of the corresponding mechanisms on the upper mold frame 2 and the lower mold frame 1 is completed, close the upper mold frame 2 on the lower mold frame 1 for injection molding. When the injection molding is completed and the demoulding begins, remove the upper mold frame 2 from the lower mold frame 1, and then remove the lower mold 9 to expose one side of the serrated decorative panel 6. Move the decorative panel 6 together with the embedded module 8 upward. After moving up a certain distance, slide the decorative panel 6 sideways to separate the decorative panel 6 from the embedded module 8, thereby completing the demoulding.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The injection mold of the automobile B-pillar decorative panel is characterized by: include: An injection mold for injection molding a decorative panel (6); The decorative plate (6) comprises a plate body (61), a strip-shaped T-shaped mechanism (62) is integrally formed at the bottom of the plate body (61) near one side edge, and a plurality of sets of mounting parts (63) are integrally formed at the bottom of the plate body (61); The injection mold comprises a lower mold frame (1) and an upper mold frame (2) that are arranged to open and close. A pin mechanism (3) is arranged at the bottom of the lower mold frame (1). A core loading groove (11) is provided at the center of the top of the lower mold frame (1). Two symmetrically arranged lower mold cores (4) are installed inside the core loading groove (11). A limiting rail (10) is installed on one side of the core loading groove (11). The limiting mechanism (5) is slidably connected to the limiting rail (10). Positioning molds (9) are installed on both the front and rear sides of the core loading groove (11). Positioning holes (7) are provided at the four corners of the top of the lower mold core (4). An embedding module (8) is embedded on the top of the lower mold core (4).

2. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: A plurality of saw teeth are provided on one side of the slide mold (9) located inside the core loading groove (11), and the saw teeth on the slide mold (9) are adapted to the shape of one side of the T-shaped mechanism (62).

3. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: The lower mold core (4) comprises a forming mold (41), a mold groove of the forming mold (41) is provided with an embedding groove (42), the embedding module (8) is embedded in the embedding groove (42), and a toothed mold (43) is integrally provided on the forming mold (41).

4. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: The tail and top of the limiting mechanism (5) are respectively overlapped with an oblique pressing piece (12) and an oblique guiding piece (13), and both the oblique pressing piece (12) and the oblique guiding piece (13) are mounted on the upper mold frame (2). The oblique guiding piece (13) is provided with an oblique rod plugged into the limiting mechanism (5).

5. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: The limiting mechanism (5) comprises a slider (51), a front end of which is integrally provided with a clamping rod (52), the clamping rod (52) being engaged with one side of the lower die core (4), a side surface of the slider (51) being provided with a mounting hole (53), and a spring buckle (54) being installed inside the mounting hole (53).

6. The injection mold for the automobile B-pillar decorative plate according to claim 5, characterized in that: The tail end of the slider (51) is arranged in an inclined shape, and a gasket (55) is installed on the inclined surface of the tail end of the slider (51).

7. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: The upper mold frame (2) includes a first frame (21), a first mold groove (22) is provided at the center of the bottom of the first frame (21), two symmetrically arranged first mold cores (25) are installed inside the first mold groove (22), six groups of first injection gates (26) are distributed inside the first mold groove (22), and the six groups of first injection gates (26) are all through-engaged in the first mold core (25), a first pressing groove (23) is provided at the bottom of the first frame (21) near one side, and first positioning rods (24) are installed at the four corners of the bottom of the first frame (21), and the first positioning rods (24) are plugged into the positioning holes (7).

8. The injection mold for the automobile B-pillar decorative plate according to claim 1, characterized in that: The upper mold frame (2) includes a second frame (201), a second mold groove (202) is opened at the center of the bottom of the second frame (201), two symmetrically arranged second mold cores (205) are installed inside the second mold groove (202), two groups of second injection gates (206) are distributed inside the second mold groove (202), and the two groups of second injection gates (206) are respectively embedded in the two second mold cores (205) in a through-type manner, a second pressing groove (203) is opened at the bottom of the second frame (201) near one side, and second positioning rods (204) are installed at the four corners of the bottom of the second frame (201), and the second positioning rods (204) are plugged into the positioning holes (7).

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