Double-cavity die for light guide strip of electric vehicle lamp

Abstract

The utility model provides a double-cavity die for a light guide strip of an electric vehicle lamp, and belongs to the technical field of dies. The light guide strip forming mold comprises an upper mold plate and a lower mold plate, two light guide strip forming cavities are formed between the upper mold plate and the lower mold plate, a multi-point side pouring structure is arranged between the upper mold plate and the lower mold plate, and a plurality of buckle forming structures are further arranged on the two sides of each light guide strip forming cavity. The two light guide strip forming cavities between the upper mold plate and the lower mold plate can form two light guide strips in an injection molding mode at a time, the buckle forming structures on the two sides of the light guide strip forming cavities can form buckles on the side portions of the light guide strips, later processing is not needed, production is convenient, glue can be fed into the side portions of the light guide strip forming cavities from multiple points through the multi-point side pouring structures, and the production efficiency is improved. And the influence of a sprue on the quality of the outer surface of a product can be reduced by feeding glue from the side part of the light guide strip forming cavity, and the stress area of the product during ejection can be increased by the multi-ejector-rod ejection mechanism so as to prevent the product from being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a double-cavity mold for a light guide strip of an electric vehicle lamp. Background Art

[0002] The light guide strips of electric vehicle headlights are generally injection molded. In the existing technology, it is not possible to directly mold clips on the side of the light guide strip during injection molding. Therefore, after the light guide strip is injection molded, several clips for installing the light guide strip need to be fixed on the side of the light guide strip with screws, which makes the production process relatively complicated.

[0003] For example, a Chinese patent discloses an injection mold for a light guide strip [application number: 201720534865.5], which includes a fixed mold, a movable mold, a fixed plate, and a mold base connected in sequence. The fixed mold is provided with a cavity, and a core is provided on the end surface of the movable mold opposite to the fixed mold. The core and the cavity are buckled to form a cavity. The core includes a molding block slidably connected to the movable mold and a molding plate abutting the molding block. A molding groove for molding a connecting block is provided on the end surface of the molding block opposite to the molding plate, and the molding block is inclined toward the side away from the center of the movable mold. Utility Model Content

[0004] The purpose of the utility model is to provide a double-cavity mold for the light guide strip of an electric vehicle lamp in order to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-cavity mold for the light guide strip of an electric vehicle headlight comprises an upper mold plate and a lower mold plate. Two light guide strip forming cavities are provided between the upper and lower mold plates. A multi-point side-injection structure is provided between the upper and lower mold plates. Several snap-fit ​​forming structures are also provided on both sides of the light guide strip forming cavity. A multi-rod ejection mechanism is also provided on the lower mold plate.

[0007] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the snap-on molding structure includes a snap-on molding part molding groove that is recessed inwardly on the lower template and a snap-on molding part molding block that is protrudingly set on the upper template. The snap-on molding part molding block and the snap-on molding part molding groove are correspondingly arranged and the snap-on molding part molding block is inserted into the snap-on molding part molding groove, and a snap-on molding groove is provided in the snap-on molding part molding groove.

[0008] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, a bolt hole forming rod is also protruding from the forming block of the buckle forming part.

[0009] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the light guide strip forming cavity is formed by a light guide strip forming block protruding from the lower mold plate and a light guide strip forming groove recessed inwardly from the upper mold plate.

[0010] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the top of the light guide strip forming block is protruding with several light guide forming blocks, and the bottom of the light guide strip forming groove is recessed inward and is provided with several light guide forming grooves corresponding to the light guide forming blocks.

[0011] In the above-mentioned double-cavity mold for the electric vehicle headlight light guide strip, the multi-point side casting structure includes two symmetrically arranged guide structures, the guide structure is arranged between the two light guide strip molding cavities, and the upper side of the upper mold plate is provided with a two-point casting assembly connected to the two guide structures.

[0012] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the two-point casting assembly includes an injection liquid diverter plate arranged on the upper side of the upper template, and two injection tubes are fixedly connected to the bottom of the injection liquid diverter plate, and the bottoms of the two injection tubes are respectively connected to the two guide structures.

[0013] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the guide structure includes an intermediate flow channel that is recessed inwardly on the lower template and arranged parallel to the light guide strip forming block. Both sides of the intermediate flow channel are connected to the side of the light guide strip forming block through at least two branch flow channels.

[0014] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle headlight, the multi-rod ejection mechanism includes a top plate arranged on the lower side of the lower template, and three straight ejector blocks connected to the edges of the light guide strip forming block are arranged at each end of the light guide strip forming block. The straight ejector blocks are connected to the top plate through ejector rods. A number of straight ejector rods distributed in a straight line are also arranged in the middle position of the light guide strip forming block, and the bottom of the straight ejector rods is fixedly connected to the top plate.

[0015] In the above-mentioned double-cavity mold for the light guide strip of the electric vehicle lamp, a plurality of excess material ejector pins are further provided on the top plate, and the tops of the excess material ejector pins are connected to the middle flow channel.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. The two light guide strip molding cavities between the upper template and the lower template can be injection molded into two light guide strips at one time. Several buckle molding structures on both sides of the light guide strip molding cavity can form buckles on the side of the light guide strip, without the need for post-processing, which is convenient for production. The multi-point side-injection structure can inject glue from multiple points to the side of the light guide strip molding cavity, which can improve the glue injection efficiency. Injecting glue from the side of the light guide strip molding cavity can reduce the impact of the gate on the outer surface quality of the product. The multi-ejector ejection mechanism can increase the force area of ​​the product during ejection to prevent product damage.

[0018] 2. The buckle forming groove arranged between the buckle forming block and the buckle forming groove can form a buckle on the side of the product without the need for subsequent processing, which is convenient for production. The bolt hole forming rod can form a bolt hole for passing the bolt on the buckle during the buckle forming process without the need for subsequent drilling.

[0019] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 It is a structural diagram of the lower template;

[0023] Figure 4 It is a structural diagram of the upper template;

[0024] Figure 5 It is a structural diagram of a multi-rod ejection mechanism. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 5 As shown, a double-cavity mold for the light guide strip of an electric vehicle headlight includes an upper template 1 and a lower template 2. Two light guide strip molding cavities are provided between the upper template 1 and the lower template 2. A multi-point side casting structure 3 is provided between the upper template 1 and the lower template 2. Several snap-fit ​​molding structures 4 are also provided on both sides of the light guide strip molding cavity. A multi-rod ejection mechanism 5 is also provided on the lower template 2.

[0026] In the utility model, the two light guide strip molding cavities between the upper template 1 and the lower template 2 can be injection molded into two light guide strips at one time, and the several snap molding structures 4 on both sides of the light guide strip molding cavity can form snaps on the side of the light guide strip, without the need for post-processing, which is convenient for production. The multi-point side casting structure 3 can inject glue into the side of the light guide strip molding cavity from multiple points, which can improve the glue injection efficiency and inject glue from the side of the light guide strip molding cavity can reduce the influence of the gate on the outer surface quality of the product. The multi-rod ejection mechanism can increase the force area of ​​the product when it is ejected to prevent product damage.

[0027] Specifically, the buckle forming structure 4 includes a buckle forming portion forming groove 6 that is recessed inwardly on the lower template 2 and a buckle forming portion forming block 7 that is protruding from the upper template 1. The buckle forming portion forming block 7 and the buckle forming portion forming groove 6 are correspondingly arranged and inserted into the buckle forming portion forming groove 6. The buckle forming portion forming groove 6 is provided with a buckle forming groove 8. The buckle forming groove 8 provided between the buckle forming portion forming block 7 and the buckle forming portion forming groove 6 can form a buckle on the side of the product, eliminating the need for post-processing and facilitating production.

[0028] Preferably, the buckle forming portion forming block 7 is also protruded with a bolt hole forming rod 10. The bolt hole forming rod 10 can form a bolt hole for inserting a bolt on the buckle during buckle forming without the need for drilling in the later stage.

[0029] Specifically, the light guide strip molding cavity is formed by a light guide strip molding block 11 protruding from the lower mold plate 2 and a light guide strip molding groove 12 recessed inwardly on the upper mold plate 1. Several light guide portion molding blocks 13 protrude from the top of the light guide strip molding block 11, while several light guide portion molding grooves 14 are recessed inwardly at the bottom of the light guide portion molding grooves 12, corresponding to the light guide portion molding blocks 13. The light guide portion molding cavity, formed by the light guide portion molding grooves 12 and the light guide portion molding block 11, can be used to injection mold light guide strip products. The light guide portion molding blocks 13, in conjunction with the light guide portion molding grooves 14, can form the light guide strip's reflective portion at the top of the light guide strip product.

[0030] Specifically, the multi-point side-pouring structure 3 includes two symmetrically arranged guide structures, which are arranged between the two light guide strip molding cavities. The upper side of the upper template 1 is provided with a two-point pouring assembly connected to the two guide structures. The two-point pouring assembly includes an injection liquid diverter plate 15 arranged on the upper side of the upper template 1. Two injection molding tubes 16 are fixedly connected to the bottom of the injection liquid diverter plate 15. The bottoms of the two injection molding tubes 16 are respectively connected to the two guide structures. The guide structure includes an intermediate flow channel 17 that is inwardly recessed and arranged on the lower template 2 and parallel to the light guide strip molding block 11. Both sides of the intermediate flow channel 17 are connected to the side of the light guide strip molding block 11 through at least two diversion channels 18. The injection liquid diverter plate can divert the injection liquid. After diversion, the injection liquid can be fed into the two guide structures from the two injection tubes. After the injection liquid enters the middle flow channel in the guide structure, it can pass through the diverter flow channels on both sides of the middle flow channel and enter the light guide strip molding cavity from the side of the light guide strip molding cavity. Feeding from the side of the light guide strip molding cavity can reduce the impact of the gate on the quality of the product's outer surface.

[0031] Specifically, the multi-rod ejection mechanism 5 includes a top plate 19 disposed on the underside of the lower mold plate 2. Three straight ejector blocks 20 are provided at each end of the light guide strip forming block 11, connected to the edges of the light guide strip forming block 11. These straight ejector blocks 20 are connected to the top plate 19 via ejector pins. Several straight ejector pins 21 are also provided in a straight line in the middle of the light guide strip forming block 11. The bottoms of these straight ejector pins 21 are fixedly connected to the top plate 19. When the top plate moves upward, the straight ejector pins and ejector blocks exert a vertical upward thrust on the product, thereby preventing damage to the product during ejection.

[0032] Preferably, a plurality of excess material ejector rods 22 are further provided on the top plate 19, and the tops of the excess material ejector rods 22 are connected to the middle flow channel 17. When the top plate moves upward, the excess material ejector rods can also apply thrust to the excess material in the middle flow channel so that the excess material can be ejected together.

[0033] The working principle of the utility model is as follows: the two light guide strip molding cavities between the upper template 1 and the lower template 2 can be used for injection molding two light guide strips at one time; the multiple buckle molding structures 4 on both sides of the light guide strip molding cavity can form buckles on the side of the light guide strip, without the need for post-processing, which is convenient for production; the multi-point side-injection structure 3 can inject glue from multiple points to the side of the light guide strip molding cavity, which can improve the glue injection efficiency and reduce the influence of the gate on the outer surface quality of the product by injecting glue from the side of the light guide strip molding cavity; the multi-rod ejection mechanism can increase the force-bearing area of ​​the product when ejecting to prevent product damage;

[0034] The buckle forming groove 8 provided between the buckle forming portion forming block 7 and the buckle forming portion forming groove 6 can form a buckle on the side of the product, without the need for subsequent processing, which facilitates production. The bolt hole forming rod 10 can form a bolt hole for passing a bolt on the buckle during buckle forming, without the need for subsequent drilling. The light guide strip forming groove 12 and the light guide strip forming block 11 form a light guide strip forming cavity that can be injection molded into a light guide strip product. The light guide portion forming block 13 cooperates with the light guide portion forming groove 14 to form a reflective portion of the light guide strip on the top of the light guide strip product.

[0035] The injection molding liquid diverter plate can divert the injection molding liquid. After the diversion, the injection molding liquid can be fed into the two guide structures from the two injection molding tubes. After the injection molding liquid enters the middle flow channel in the guide structure, it can enter the light guide strip molding cavity from the side of the light guide strip molding cavity through the diverter flow channels on both sides of the middle flow channel. Feeding the glue from the side of the light guide strip molding cavity can reduce the influence of the gate on the quality of the product's outer surface. When the top plate moves upward, the straight ejector rod and the straight ejector block can apply a vertical upward thrust to the product, thereby preventing the product from being damaged during ejection. When the top plate moves upward, the residual material ejector rod can also apply a thrust to the residual material in the middle flow channel, thereby ejecting the residual material together.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A double-cavity mold for a light guide strip of an electric vehicle lamp, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that: Two light guide strip forming cavities are provided between the upper template (1) and the lower template (2), a multi-point side pouring structure (3) is provided between the upper template (1) and the lower template (2), a plurality of snap-fit ​​forming structures (4) are provided on both sides of the light guide strip forming cavity, and a multi-rod ejection mechanism (5) is provided on the lower template (2).

2. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 1, characterized in that: The snap-fit ​​forming structure (4) comprises a snap-fit ​​forming portion forming groove (6) recessed inwardly on the lower template (2) and a snap-fit ​​forming portion forming block (7) protrudingly on the upper template (1); the snap-fit ​​forming portion forming block (7) and the snap-fit ​​forming portion forming groove (6) are correspondingly arranged, and the snap-fit ​​forming portion forming block (7) is inserted into the snap-fit ​​forming portion forming groove (6); and a snap-fit ​​forming groove (8) is arranged in the snap-fit ​​forming portion forming groove (6).

3. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 2, characterized in that: The buckle forming portion forming block (7) is also provided with a bolt hole forming rod (10) protruding therefrom.

4. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 2, characterized in that: The light guide strip forming cavity is formed by combining a light guide strip forming block (11) protruding from the lower template (2) and a light guide strip forming groove (12) recessed inwardly from the upper template (1).

5. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 4, characterized in that: The top of the light guide strip forming block (11) is provided with a plurality of light guide portion forming blocks (13) protruding therefrom, and the bottom of the light guide strip forming groove (12) is provided with a plurality of light guide portion forming grooves (14) corresponding to the light guide portion forming blocks (13) recessed therein.

6. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 5, characterized in that: The multi-point side-casting structure (3) comprises two symmetrically arranged flow-guiding structures, wherein the flow-guiding structure is arranged between two light guide strip forming cavities, and the upper side of the upper template (1) is provided with a two-point casting assembly connected to the two flow-guiding structures.

7. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 6, characterized in that: The two-point pouring assembly includes an injection liquid diverter plate (15) arranged on the upper side of the upper template (1), and two injection tubes (16) are fixedly connected to the bottom of the injection liquid diverter plate (15), and the bottoms of the two injection tubes (16) are respectively connected to two guide structures.

8. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 7, characterized in that: The guide structure comprises an intermediate flow channel (17) which is recessed inwardly and arranged on the lower template (2) and is arranged parallel to the light guide strip forming block (11). Both sides of the intermediate flow channel (17) are connected to the side of the light guide strip forming block (11) through at least two branch flow channels (18).

9. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 8, characterized in that: The multi-rod ejection mechanism (5) includes a top plate (19) arranged on the lower side of the lower template (2), three straight top blocks (20) connected to the edges of the light guide strip forming block (11) are respectively arranged at both ends of the light guide strip forming block (11), the straight top blocks (20) are connected to the top plate (19) through top rods, and a plurality of straight top rods (21) distributed in a straight line are also arranged in the middle position of the light guide strip forming block (11), and the bottom of the straight top rods (21) is fixedly connected to the top plate (19).

10. The double-cavity mold for the light guide strip of an electric vehicle lamp according to claim 9, characterized in that: A plurality of residual material ejector rods (22) are also provided on the top plate (19), and the tops of the residual material ejector rods (22) are connected to the middle flow channel (17).

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