Injection molding mold for thick-wall light guide of automobile lamp

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an injection molding mold for a thick-wall light guide of an automobile lamp. The automobile lamp thick-wall light guide forming die comprises an automobile lamp thick-wall light guide forming lower die and an automobile lamp thick-wall light guide forming upper die. In the injection molding process, the automobile lamp thick-wall light guide forming lower mold and the automobile lamp thick-wall light guide forming upper mold are close to each other, so that the automobile lamp thick-wall light guide forming upper part is attached to the combined splicing type light guide main body forming piece to form two complete cavities; molten materials are injected into the middle of a cavity through the oblique injection type flow dividing injection molding assembly, an oblique injection mode is adopted in the injection molding process, the injection molding flow dividing structure is prevented from colliding or interfering with other cooling structures, follow-up cooling cannot be affected, and after injection molding is completed, cooling water is introduced into the embedded cooling piece, so that the cooling efficiency is improved. And the molded plastic part is cooled.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection molding mold for a thick-walled light guide of an automobile headlamp. Background Art

[0002] With the continuous development of automobile energy conservation and emission reduction technologies, more and more automobile headlamps adopt light guide structures, especially thick-walled light guides. The thick-walled light guide evenly emits the light emitted by the LED lamp, turning the point light source of the LED lamp into a surface light source. In this way, the number of LED lamps can be greatly reduced, the energy consumption can be reduced while ensuring the lighting effect, and at the same time, the price cost of the headlamp can be reduced. Most of the currently used thick-walled light guides are injection molded using injection molds. Since the shape of the thick-walled light guide is generally slender, multi-tube synchronous injection is used during injection molding. During injection, there will be interference in the upper cooling structure, affecting subsequent cooling and resulting in incomplete cooling. Therefore, there is an urgent need to design an injection molding mold for a thick-walled light guide of an automobile headlamp that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a thick-walled light guide element, a thick-walled light guide assembly, a headlamp and an automobile [Application No.: 202310613565.6]. The thick-walled light guide element includes a light incident surface, multiple groups of thick-walled reflection surfaces and a light exit surface. The thick-walled reflection surface includes multiple reflection acting surfaces. The reflection acting surface includes a reflection upper region, a reflection middle region and a reflection lower region. The reflection upper region and the reflection lower region are symmetrically arranged relative to the reflection middle region. Multiple groups of thick-walled reflection surface patterns are provided on the reflection acting surface. The thick-walled reflection surface patterns include a first thick-walled reflection surface pattern, a second thick-walled reflection pattern and a third thick-walled reflection surface pattern. The reflection upper region is sequentially provided with the third thick-walled reflection surface pattern, the second thick-walled reflection surface pattern and the first thick-walled reflection surface pattern from top to bottom. The thick-walled reflection middle region is provided with the second thick-walled reflection pattern. The thick-walled reflection lower region is sequentially provided with the third thick-walled reflection surface pattern, the second thick-walled reflection surface pattern and the first thick-walled reflection surface pattern from bottom to top. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection molding mold for a thick-walled light guide of an automobile headlamp in view of the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An injection molding die for a thick-walled light guide of an automotive headlight, comprising a lower die for forming the thick-walled light guide of the automotive headlight and an upper die for forming the thick-walled light guide of the automotive headlight. There are two upper parts for forming the thick-walled light guide of the headlight symmetrically arranged along the center line of the upper die for forming the thick-walled light guide of the automotive headlight. A combined and spliced light guide main body forming part is arranged between the lower die for forming the thick-walled light guide of the automotive headlight and the upper part for forming the thick-walled light guide of the headlight. The shape of the combined and spliced light guide main body forming part is adapted to that of the upper part for forming the thick-walled light guide of the headlight. An inclined injection type split injection molding component corresponding to the position of the upper part for forming the thick-walled light guide of the headlight is arranged above the upper die for forming the thick-walled light guide of the automotive headlight. An embedded cooling part is arranged in the lower die for forming the thick-walled light guide of the automotive headlight, and the position of the embedded cooling part corresponds to that of the combined and spliced light guide main body forming part.

[0007] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, the inclined injection type split injection molding component includes an injection molding main board arranged above the upper die for forming the thick-walled light guide of the automotive headlight. There are two injection molding main cylinders in the injection molding main board. Three inclined injection split pipes extending into the upper die for forming the thick-walled light guide of the automotive headlight are arranged at the bottom of the injection molding main cylinder. The inclined injection split pipes are inclined.

[0008] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, a split plate is arranged between the inclined injection split pipe and the injection molding main cylinder. One end of the split plate is connected to the injection molding main cylinder, and the other end is connected to the inclined injection split pipe.

[0009] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, the inclined injection split pipe corresponds to the middle part of the combined and spliced light guide main body forming part. A fixed sleeve plate is arranged between the injection molding main board and the upper die for forming the thick-walled light guide of the automotive headlight. The split plate and the inclined injection split pipe are respectively clamped and matched with the fixed sleeve plate.

[0010] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, the combined and spliced light guide main body forming part includes two inner forming inserts and two outer forming inserts arranged between the lower die for forming the thick-walled light guide of the automotive headlight and the upper part for forming the thick-walled light guide of the headlight. Adjacent inner forming inserts and outer forming inserts form a group.

[0011] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, a forming recess is formed between the inner forming insert and the outer forming insert. The inclined injection split pipe corresponds to the position of the forming recess.

[0012] In the above-mentioned injection molding die for a thick-walled light guide of an automotive headlight, a screw-connected fixing seat is arranged in the middle of the lower die for forming the thick-walled light guide of the automotive headlight. The screw-connected fixing seat is abutted and matched with the inner forming insert.

[0013] In the above-mentioned injection molding die for thick-walled optical waveguide of automobile headlamp, the embedded cooling part includes a lower horizontal water inlet pipe and a lower longitudinal cooling pipe arranged in the lower die for forming the thick-walled optical waveguide of automobile headlamp. The lower horizontal water inlet pipe and the lower longitudinal cooling pipe are arranged in communication, and the lower longitudinal cooling pipe is located directly below the forming recess.

[0014] In the above-mentioned injection molding die for thick-walled optical waveguide of automobile headlamp, an upper horizontal water inlet pipe and an upper longitudinal cooling pipe are arranged in the upper die for forming the thick-walled optical waveguide of automobile headlamp. The upper longitudinal cooling pipe is located directly above the forming recess.

[0015] In the above-mentioned injection molding die for thick-walled optical waveguide of automobile headlamp, the upper horizontal water inlet pipe and the upper longitudinal cooling pipe are respectively arranged in a staggered manner with the inclined injection shunt pipe.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows:

[0017] 1. During the injection molding process of the present utility model, the lower die for forming the thick-walled optical waveguide of automobile headlamp and the upper die for forming the thick-walled optical waveguide of automobile headlamp are brought closer to each other, so that the upper part of the thick-walled optical waveguide of the headlamp is fitted with the combined and spliced optical waveguide main body forming part to form two complete cavities. The molten material is injected into the middle of the cavity through the inclined injection type shunt injection molding assembly. In the injection molding process, the form of inclined injection is adopted to avoid the collision or interference between the injection shunt structure and other cooling structures, and it will not affect the subsequent cooling. After the injection molding is completed, cooling water is introduced into the embedded cooling part to cool the molded plastic part.

[0018] 2. The present utility model adopts an upper and lower multi-layer cooling structure to cool the upper and lower surfaces of the molded plastic part synchronously and comprehensively, and the cooling effect is good.

[0019] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model.

[0021] Figure 2 is a schematic partial structural diagram of the present utility model.

[0022] Figure 3 is a schematic partial structural diagram of the present utility model in another direction.

[0023] Figure 4 is a schematic structural diagram of the inclined injection type shunt injection molding assembly.

[0024] Figure 5 is a schematic structural diagram of the fixed sleeve plate.

[0025] Figure 6 It is a schematic structural diagram of the upper mold for forming the thick-walled optical waveguide of an automotive headlight.

[0026] In the figure: the lower mold 1 for forming the thick-walled optical waveguide of an automotive headlight, the upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight, the upper part 3 of the thick-walled optical waveguide for forming the headlight, the combined and spliced optical waveguide main body forming part 4, the inclined injection type shunt injection molding assembly 5, the embedded cooling part 6, the injection molding main board 7, the injection molding main cylinder 8, the inclined injection shunt pipe 9, the shunt plate 10, the fixed sleeve plate 11, the inner side forming insert 12, the outer side forming insert 13, the forming recess 14, the screw connection fixing seat 15, the lower horizontal water inlet pipe 16, the lower longitudinal cooling pipe 17, the upper horizontal water inlet pipe 18, the upper longitudinal cooling pipe 19. Specific embodiments

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] As Figures 1-6 shown, an injection molding die for the thick-walled optical waveguide of an automotive headlight includes a lower mold 1 for forming the thick-walled optical waveguide of an automotive headlight and an upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight. Two upper parts 3 of the thick-walled optical waveguide for forming the headlight that are symmetric about the center line of the upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight are arranged inside the upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight. A combined and spliced optical waveguide main body forming part 4 is arranged between the lower mold 1 for forming the thick-walled optical waveguide of an automotive headlight and the upper part 3 of the thick-walled optical waveguide for forming the headlight. The shape of the combined and spliced optical waveguide main body forming part 4 is adapted to the shape of the upper part 3 of the thick-walled optical waveguide for forming the headlight. An inclined injection type shunt injection molding assembly 5 corresponding to the position of the upper part 3 of the thick-walled optical waveguide for forming the headlight is arranged above the upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight. An embedded cooling part 6 is arranged inside the lower mold 1 for forming the thick-walled optical waveguide of an automotive headlight. The position of the embedded cooling part 6 corresponds to the position of the combined and spliced optical waveguide main body forming part 4.

[0029] In this embodiment, during the injection molding process, the lower mold 1 for forming the thick-walled optical waveguide of an automotive headlight and the upper mold 2 for forming the thick-walled optical waveguide of an automotive headlight are moved closer to each other, so that the upper part 3 of the thick-walled optical waveguide for forming the headlight is in contact with the combined and spliced optical waveguide main body forming part 4 to form two complete cavities. The molten material is injected into the middle of the cavity through the inclined injection type shunt injection molding assembly 5. In the injection molding process, the form of inclined injection is adopted to avoid the collision or interference between the injection shunt structure and other cooling structures, and it will not affect the subsequent cooling. After the injection molding is completed, cooling water is introduced into the embedded cooling part 6 to cool the molded plastic part.

[0030] Combined with Figures 1-6As shown, the inclined injection type split injection molding assembly 5 includes an injection main board 7 disposed above the thick-walled light guide forming upper mold 2 of the automotive headlamp. Two injection main cylinders 8 are provided inside the injection main board 7. Three inclined injection split pipes 9 extending into the thick-walled light guide forming upper mold 2 of the automotive headlamp are provided at the bottom of the injection main cylinder 8. The inclined injection split pipes 9 are inclined. A split plate 10 is provided between the inclined injection split pipes 9 and the injection main cylinder 8. One end of the split plate 10 is connected to the injection main cylinder 8, and the other end is connected to the inclined injection split pipe 9.

[0031] Specifically, during the injection molding process, the molten material is injected into the split plate 10 through the injection main cylinder 8 inside the injection main board 7. After the material is split by the split plate 10, it is then injected into the inclined injection split pipe 9 for inclined injection molding. By adopting the form of inclined injection, it can avoid the collision or interference between the injection split structure and other cooling structures, will not affect the subsequent cooling, ensure the compact and reasonable internal structure of the mold, and reduce the volume.

[0032] Combined with Figure 2 、 Figure 3 As shown, the inclined injection split pipe 9 corresponds to the middle part of the combined splicing type light guide main body forming part 4. A fixed sleeve plate 11 is provided between the injection main board 7 and the thick-walled light guide forming upper mold 2 of the automotive headlamp. The split plate 10 and the inclined injection split pipe 9 are respectively clamped and matched with the fixed sleeve plate 11.

[0033] In this embodiment, the fixed sleeve plate 11 is used to fix the split plate 10 and the inclined injection split pipe 9, to avoid the shaking of the split plate 10 and the inclined injection split pipe 9 during the injection molding process, and improve the stability.

[0034] The combined splicing type light guide main body forming part 4 includes two inner forming inserts 12 and two outer forming inserts 13 disposed between the thick-walled light guide forming lower mold 1 of the automotive headlamp and the upper part 3 of the thick-walled light guide forming of the headlamp. The adjacent inner forming insert 12 and outer forming insert 13 are a group. A forming recess 14 is formed between the inner forming insert 12 and the outer forming insert 13. The inclined injection split pipe 9 corresponds to the position of the forming recess 14.

[0035] In this embodiment, during the injection molding process, the adjacent inner forming insert 12 and outer forming insert 13 are a group. A forming recess 14 is formed between the inner forming insert 12 and the outer forming insert 13, and in cooperation with the upper part 3 of the thick-walled light guide forming of the headlamp, a complete cavity is formed.

[0036] A screw connection fixing seat 15 is provided in the middle of the thick-walled light guide forming lower mold 1 of the automotive headlamp. The screw connection fixing seat 15 is in abutting connection with the inner forming insert 12.

[0037] In this embodiment, the screw connection fixing seat 15 is used to fix the inner forming insert 12, to avoid the left and right offset of the inner forming insert 12.

[0038] Combined with Figures 2-3 As shown, the embedded cooling member 6 includes a lower horizontal water inlet pipe 16 and a lower longitudinal cooling pipe 17 disposed in the lower die 1 for forming the thick-walled light guide of the automotive headlamp. The lower horizontal water inlet pipe 16 and the lower longitudinal cooling pipe 17 are connected and communicated, and the lower longitudinal cooling pipe 17 is located directly below the forming recess 14.

[0039] In this embodiment, after injection molding, cooling water is introduced into the lower horizontal water inlet pipe 16, and then the lower part of the molded plastic part is cooled through the lower longitudinal cooling pipe 17, and the cooling effect is good.

[0040] Combined with Figures 1-3 As shown, an upper horizontal water inlet pipe 18 and an upper longitudinal cooling pipe 19 are provided in the upper die 2 for forming the thick-walled light guide of the automotive headlamp. The upper longitudinal cooling pipe 19 is located directly above the forming recess 14, and the upper horizontal water inlet pipe 18 and the upper longitudinal cooling pipe 19 are respectively arranged in an intersecting manner with the inclined injection shunt pipe 9.

[0041] In this embodiment, after injection molding, cooling water is introduced into the upper horizontal water inlet pipe 18, and then the upper part of the molded plastic part is cooled through the upper longitudinal cooling pipe 19, and the cooling effect is good. The upper horizontal water inlet pipe 18 and the upper longitudinal cooling pipe 19 are respectively arranged in an intersecting manner with the inclined injection shunt pipe 9, avoiding collision or interference between the injection shunt structure and other cooling structures, and will not affect subsequent cooling.

[0042] The working principle of the present utility model is:

[0043] During the injection molding process, the lower die 1 for forming the thick-walled light guide of the automotive headlamp and the upper die 2 for forming the thick-walled light guide of the automotive headlamp are brought closer to each other. The adjacent inner forming panel 12 and the outer forming panel 13 are a group, and a forming recess 14 is formed between the inner forming panel 12 and the outer forming panel 13. Cooperating with the upper part 3 for forming the thick-walled light guide of the headlamp, a complete cavity is formed. The molten material is injected into the manifold 10 through the injection barrel 8 in the injection main board 7. After the material is shunted by the manifold 10, it is then injected into the inclined injection shunt pipe 9 for oblique injection molding. By adopting the form of oblique injection, collision or interference between the injection shunt structure and other cooling structures is avoided, and subsequent cooling will not be affected, ensuring that the internal structure of the mold is compact and reasonable, and reducing the volume.

[0044] The fixed sleeve plate 11 is used to fix the manifold 10 and the inclined injection shunt pipe 9, avoiding the shaking of the manifold 10 and the inclined injection shunt pipe 9 during the injection molding process and improving the stability. The screwed fixing seat 15 is used to fix the inner forming panel 12, avoiding the left and right offset of the inner forming panel 12.

[0045] After the injection molding is completed, cooling water is introduced into the lower horizontal water inlet pipe 16, and then the lower part of the molded plastic part is cooled through the lower vertical cooling pipe 17. Cooling water is introduced into the upper horizontal water inlet pipe 18, and then the upper part of the molded plastic part is cooled through the upper vertical cooling pipe 19. The cooling effect is good. The upper horizontal water inlet pipe 18 and the upper vertical cooling pipe 19 are respectively arranged in a staggered manner with the inclined injection shunt pipe 9, avoiding collision or interference between the injection shunt structure and other cooling structures, and will not affect subsequent cooling.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present invention.

[0047] Although terms such as the lower mold 1 for forming thick-walled optical guides of automotive headlights, the upper mold 2 for forming thick-walled optical guides of automotive headlights, the upper part 3 for forming thick-walled optical guides of headlights, the combined and spliced optical guide main body forming part 4, the inclined injection shunt injection molding assembly 5, the embedded cooling part 6, the injection molding main board 7, the injection molding main cylinder 8, the inclined injection shunt pipe 9, the shunt plate 10, the fixed sleeve plate 11, the inner forming insert panel 12, the outer forming insert panel 13, the forming recess 14, the screw connection fixing seat 15, the lower horizontal water inlet pipe 16, the lower vertical cooling pipe 17, the upper horizontal water inlet pipe 18, and the upper vertical cooling pipe 19 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention, and interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A thick-walled light guide injection molding mold for automobile headlights, comprising a lower mold (1) for molding thick-walled light guides for automobile headlights and an upper mold (2) for molding thick-walled light guides for automobile headlights, characterized in that: The thick-walled light guide molding upper mold (2) for automobile headlights is provided with two thick-walled light guide molding upper parts (3) symmetrically along the center line of the thick-walled light guide molding upper mold (2); a combined spliced ​​light guide main body molding part (4) is provided between the thick-walled light guide molding lower mold (1) for automobile headlights and the thick-walled light guide molding upper part (3); the combined spliced ​​light guide main body molding part (4) is matched in shape with the thick-walled light guide molding upper part (3); an oblique injection type split-flow injection molding component (5) corresponding to the position of the thick-walled light guide molding upper part (3) is provided above the thick-walled light guide molding upper mold (2); an embedded cooling part (6) is provided in the thick-walled light guide molding lower mold (1) for automobile headlights; the embedded cooling part (6) corresponds in position to the combined spliced ​​light guide main body molding part (4).

2. The thick-walled light guide injection molding mold for automobile lamps according to claim 1, characterized in that: The oblique injection type flow-dividing injection molding component (5) comprises an injection molding main board (7) arranged above a thick-walled optical waveguide molding upper mold (2) for automobile headlights, two injection molding main cylinders (8) are arranged in the injection molding main board (7), and three oblique injection flow-dividing pipes (9) are arranged at the bottom of the injection molding main cylinder (8) and extend into the thick-walled optical waveguide molding upper mold (2) for automobile headlights, and the oblique injection flow-dividing pipes (9) are arranged in an inclined manner.

3. The thick-walled light guide injection molding mold for automobile lamps according to claim 2, characterized in that: A diverter plate (10) is provided between the oblique injection diverter pipe (9) and the injection main cylinder (8); one end of the diverter plate (10) is connected to the injection main cylinder (8), and the other end is connected to the oblique injection diverter pipe (9).

4. The thick-walled light guide injection molding mold for automobile lamps according to claim 3, characterized in that: The oblique injection manifold (9) corresponds to the middle part of the combined spliced ​​light guide main body molding (4); a fixed sleeve (11) is provided between the injection molding main board (7) and the automobile lamp thick-walled light guide molding upper mold (2); the manifold (10) and the oblique injection manifold (9) are respectively engaged with the fixed sleeve (11).

5. The thick-walled light guide injection molding mold for automobile lamps according to claim 4, characterized in that: The combined spliced ​​light guide main body molding (4) comprises two inner molding panels (12) and two outer molding panels (13) arranged between a lower mold (1) for molding a thick-walled light guide for an automobile headlight and an upper mold (3) for molding a thick-walled light guide for an automobile headlight, wherein adjacent inner molding panels (12) and outer molding panels (13) form a group.

6. The thick-walled light guide injection molding mold for automobile lamps according to claim 5, characterized in that: A molding concave portion (14) is formed between the inner molding panel (12) and the outer molding panel (13), and the position of the oblique injection shunt pipe (9) corresponds to the molding concave portion (14).

7. The thick-walled light guide injection molding mold for automobile lamps according to claim 6, characterized in that: A screw-connected fixing seat (15) is provided in the middle of the thick-walled light guide molding lower mold (1) for automobile headlights, and the screw-connected fixing seat (15) is abutted and matched with the inner molding panel (12).

8. The thick-walled light guide injection molding mold for automobile lamps according to claim 7, characterized in that: The embedded cooling component (6) comprises a lower transverse water inlet pipe (16) and a lower longitudinal cooling pipe (17) arranged in a lower mold (1) for forming a thick-walled light guide of an automobile lamp; the lower transverse water inlet pipe (16) and the lower longitudinal cooling pipe (17) are arranged in communication with each other; and the lower longitudinal cooling pipe (17) is located directly below the forming recess (14).

9. The thick-walled light guide injection molding mold for automobile lamps according to claim 8, characterized in that: An upper transverse water inlet pipe (18) and an upper longitudinal cooling pipe (19) are provided in the thick-walled light guide molding upper mold (2) for automobile lamps. The upper longitudinal cooling pipe (19) is located directly above the molding recess (14).

10. The thick-walled light guide injection molding mold for automobile lamps according to claim 9, characterized in that: The upper transverse water inlet pipe (18) and the upper longitudinal cooling pipe (19) are respectively arranged alternately with the oblique injection diversion pipe (9).

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