Injection mold for a light guide strip of an automobile lamp

Abstract

The utility model relates to an injection mold of automobile lamp light guide strip, including respectively front and rear arrangement and mutually cooperate's forming module and auxiliary module, fixed in the forming module front side's distribution block, fixed in the distribution block front side's end plate, fixed in the auxiliary module rear side's bottom plate, set up in the top material mechanism between bottom plate and auxiliary module, and set up in the forming module and the auxiliary module between the mold core, the mold core includes respectively embeds in the forming module rear side and auxiliary module front side and mutually cooperate's initiative core block and positioning core block, and two set up in initiative core block and positioning core block between and the core pulling assembly that presents central symmetry distribution, the utility model has simplified production procedure to reach the effect of time -saving and labour -saving, big reduction position error of buckle ring is ensured to the subsequent assembly again, and the occurrence of the scrap is effectively avoided.

Description

Technical Field

[0001] This utility model relates to an injection mold for an automotive light guide strip. Background Technology

[0002] Automotive light guides are an important component of automotive lighting systems, primarily used to guide and disperse light from a source to achieve a uniform and soft lighting effect. They are widely used in both interior and exterior automotive lighting. Light guides are generally made of transparent or semi-transparent plastic materials and manufactured through injection molding.

[0003] Because multiple snap rings need to be formed along the length of the light guide strip, these snap rings cannot be generated at the same time as the light guide strip is formed. Instead, a drilling process is arranged separately after the main structure of the light guide strip is formed to process the snap rings at the corresponding positions of the light guide strip. Therefore, the production process is relatively complicated, time-consuming and labor-intensive. At the same time, the accuracy of the drilling process is relatively low, which leads to a large positional error of the snap rings, thus affecting subsequent assembly and easily causing scrap. Further improvements are needed. Utility Model Content

[0004] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide an injection mold for automotive light guide strips that simplifies the production steps to achieve the effect of saving time and labor, while significantly reducing the positional error of the snap ring to ensure subsequent assembly, and effectively avoiding scrapping.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an injection mold for an automotive light guide strip, comprising a molding module and an auxiliary module respectively arranged front and rear and cooperating with each other, a material distribution block fixed to the front side of the molding module, an end plate fixed to the front side of the material distribution block, a base plate fixed to the rear side of the auxiliary module, an ejector mechanism disposed between the base plate and the auxiliary module, and a mold core disposed between the molding module and the auxiliary module, characterized in that:

[0006] The mold core includes an active core block and a positioning core block respectively embedded in the rear side of the molding module and the front side of the auxiliary module and cooperating with each other, as well as two core-pulling components disposed between the active core block and the positioning core block and distributed in a centrally symmetrical manner.

[0007] On the end face of the active core block, two first forming protrusions are formed in a vertically arranged and centrally symmetrically distributed manner in the direction of the positioning core block. Correspondingly, on the end face of the positioning core block, two second forming protrusions are formed in a vertically arranged and centrally symmetrically distributed manner in the direction of the active core block, and each of them cooperates with the two first forming protrusions.

[0008] The core-pulling assembly includes a slider movably connected to the front of the auxiliary module to have left and right translation function, a number of traction columns that are inclined and interspersed in the slider and arranged in parallel from top to bottom, and a first side molding block and a second side molding block that are fixed on the outer wall of the slider near the positioning core block and respectively arranged vertically. The front end of each traction column is fixed on the molding module.

[0009] The slider is also provided with several secondary core-pulling modules arranged sequentially from top to bottom. Each secondary core-pulling module includes a guide block movably embedded in the side of the slider away from the positioning core block to enable left and right elastic movement, several core-pulling rods horizontally fixed on the outer wall of the guide block facing the positioning core block and arranged in parallel from top to bottom, and a drive block fixed on the outer wall of the guide block away from the positioning core block. The end of each core-pulling rod passes through the slider and is inserted into the first side molding block or the second side molding block.

[0010] Preferably, each of the first molding protrusions has a first molding notch and a second molding notch on the left and right sides of its end face, respectively. Correspondingly, each of the positioning core blocks has a third molding notch and a fourth molding notch on the left and right sides of its end face, respectively. Each of the third molding notch and each of the fourth molding notch cooperates with a corresponding first molding notch and a corresponding second molding notch.

[0011] Preferably, the molding module has a mold cavity on its rear side, the active core block is embedded in the mold cavity, and a stepped groove is formed on the inner wall of both the left and right sides of the mold cavity. Each stepped groove has several guide grooves arranged sequentially from top to bottom on its inner wall. The number of guide grooves is equal to the number of secondary core-pulling modules. The driving block in each secondary core-pulling module is movably disposed in a corresponding guide groove.

[0012] Preferably, a first guide slope is formed on the outer wall of each drive block on the side away from the positioning core block, and correspondingly, a second guide slope that cooperates with the first guide slope is formed on the inner wall of each guide groove.

[0013] Preferably, a first corner groove is formed on the outer wall of the first side molding block facing the positioning core block, and a second corner groove is formed on the outer wall of the second side molding block facing the positioning core block. The opening edges of both the first and second corner grooves are provided with a plurality of first snap-fit ​​grooves arranged sequentially from top to bottom. Correspondingly, each of the third and fourth molding notches is provided with a plurality of second snap-fit ​​grooves arranged sequentially from top to bottom on its outer bottom surface. The number and position of the first snap-fit ​​grooves on the first corner grooves are matched with the number and position of the second snap-fit ​​grooves on the fourth molding notch, and the number and position of the first snap-fit ​​grooves on the second corner grooves are matched with the number and position of the second snap-fit ​​grooves on the third molding notch.

[0014] Preferably, a plurality of recessed holes are provided on the outer wall of the first side molding block facing the positioning core block and on the outer wall of the second side molding block facing the positioning core block, arranged sequentially from top to bottom. A boss is formed outward from the center of the bottom surface of each recessed hole, and a boss is formed outward from the center of the end of each boss.

[0015] Preferably, each of the first molding notch and each of the second molding notch has a plurality of fastener notches distributed from top to bottom at the edge of the opening. The number and position of the recesses on the first side molding block are matched with the number and position of the fastener notches on the second molding notch, and the number and position of the recesses on the second side molding block are matched with the number and position of the fastener notches on the first molding notch.

[0016] Preferably, each of the third and fourth forming notches has multiple serrated grooves that are equally spaced from top to bottom on its inner wall.

[0017] Compared with the prior art, the advantages of this utility model are as follows: This utility model can use a two-stage core-pulling module to mold each buckle ring at the same time during the injection molding process of the main structure of the light guide strip, without the need for a separate drilling process, thereby simplifying the production steps to achieve the effect of saving time and effort. At the same time, it can significantly reduce the positional error of the buckle ring to ensure subsequent assembly and effectively avoid scrap. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings:

[0019] Figure 1This is an exploded view of the right front side of this utility model;

[0020] Figure 2 This is a structural diagram of the right front side of the positioning core block of this utility model;

[0021] Figure 3 This is a structural diagram of the left rear side of the active chip of this utility model;

[0022] Figure 4 This is an exploded view of the right front side of the core-pulling assembly of this utility model;

[0023] Figure 5 This is a structural diagram of the right front side of the slider of this utility model;

[0024] Figure 6 This is a structural diagram of the left rear side of the molding module of this utility model;

[0025] Figure 7 This is a structural diagram of the left rear side of the first side molding block of this utility model;

[0026] Figure 8 This is a structural diagram of the left rear side of the second side molding block of this utility model. Detailed Implementation

[0027] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0029] like Figures 1-8As shown, an injection mold for an automotive light guide strip includes a molding module 3 and an auxiliary module 5 arranged at the front and rear and cooperating with each other, a material distribution block 2 fixed to the front side of the molding module 3, an end plate 1 fixed to the front side of the material distribution block 2, a base plate 7 fixed to the rear side of the auxiliary module 5, an ejector mechanism 8 disposed between the base plate 7 and the auxiliary module 5, and a mold core disposed between the molding module 3 and the auxiliary module 5.

[0030] The mold core includes an active core block 4 and a positioning core block 6 respectively embedded on the rear side of the molding module 3 and the front side of the auxiliary module 5 and cooperating with each other, as well as two core-pulling components 9 disposed between the active core block 4 and the positioning core block 6 and distributed in a centrally symmetrical manner.

[0031] Two first forming protrusions 41 are formed on the end face of the active core block 4 in the direction of the positioning core block 6, and are arranged vertically and centrally symmetrically. Correspondingly, two second forming protrusions 61 are formed on the end face of the positioning core block 6 in the direction of the active core block 4, and are arranged vertically and centrally symmetrically, and respectively cooperate with the two first forming protrusions 41.

[0032] The core-pulling assembly 9 includes a slider 91 movably connected to the front of the auxiliary module 5 to have left and right translation function, several traction columns 94 inclinedly interspersed in the slider 91 and arranged in parallel from top to bottom, and a first side molding block 92 and a second side molding block 93 fixed on the outer wall of the slider 91 near the positioning core block 6 and respectively arranged vertically. The front end of each traction column 94 is fixed on the molding module 3.

[0033] The slider 91 is also provided with several secondary core-pulling modules arranged sequentially from top to bottom. The secondary core-pulling module includes a guide block 95 that is movably embedded in the side of the slider 91 away from the positioning core block 6 to have the function of elastic left and right movement, several core-pulling rods 97 that are horizontally fixed on the outer wall of the guide block 95 facing the positioning core block 6 and arranged in parallel from top to bottom, and a drive block 96 fixed on the outer wall of the guide block 95 away from the positioning core block 6. The end of each core-pulling rod 97 passes through the slider 91 and is inserted into the first side molding block 92 or the second side molding block 93.

[0034] Each first molding protrusion 41 has a first molding notch 43 and a second molding notch 42 respectively on the left and right sides of its end face. Correspondingly, each positioning core block 6 has a third molding notch 63 and a fourth molding notch 62 respectively on the left and right sides of its end face. Each third molding notch 63 and each fourth molding notch 62 cooperate with a corresponding first molding notch 43 and a corresponding second molding notch 42.

[0035] The molding module 3 has a mold cavity 31 on its rear side. The active core block 4 is embedded in the mold cavity 31. A stepped groove 32 is provided on the inner wall of both the left and right sides of the mold cavity 31. Several guide grooves 33 are provided on the inner wall of each stepped groove 32, arranged from top to bottom. The number of guide grooves 33 is equal to the number of secondary core pulling modules. The driving block 96 in each secondary core pulling module is movably disposed in a corresponding guide groove 33.

[0036] A first guide slope 961 is formed on the outer wall of each drive block 96 on the side away from the positioning core block 6. Correspondingly, a second guide slope 34 that cooperates with the first guide slope 961 is formed on the inner wall of each guide groove 33.

[0037] A first corner groove 921 is formed on the outer wall of the first side molding block 92 facing the positioning core block 6, and a second corner groove 931 is formed on the outer wall of the second side molding block 93 facing the positioning core block 6. Several first snap-fit ​​grooves 912 are provided at the opening edges of the first corner groove 921 and the second corner groove 931, arranged sequentially from top to bottom. Correspondingly, several second snap-fit ​​grooves 65 are provided at the outer edge of the bottom surface of each third molding notch 63 and each fourth molding notch 62. The number and position of the first snap-fit ​​grooves 912 on the first corner groove 921 are matched with the number and position of the second snap-fit ​​grooves 65 on the fourth molding notch 62, and the number and position of the first snap-fit ​​grooves 912 on the second corner groove 931 are matched with the number and position of the second snap-fit ​​grooves 65 on the third molding notch 63.

[0038] On the outer wall of the first side molding block 92 facing the positioning core block 6 and on the outer wall of the second side molding block 93 facing the positioning core block 6, a number of recessed holes 99 are provided in sequence from top to bottom. A boss 910 is formed outward from the center of the bottom surface of each recessed hole 99, and a boss 911 is formed outward from the center of the end of each boss 910.

[0039] Each first molding notch 43 and each second molding notch 42 has several fastener notches 44 arranged sequentially from top to bottom at the opening edge. The number and position of the recesses 99 on the first side molding block 92 are matched with the number and position of the fastener notches 44 on the second molding notch 42. The number and position of the recesses 99 on the second side molding block 93 are matched with the number and position of the fastener notches 44 on the first molding notch 43.

[0040] Each third forming notch 63 and each fourth forming notch 62 has multiple serrated grooves 64 that are equally spaced from top to bottom on their inner walls.

[0041] On the side of the slider 91 away from the positioning core block 6, there are several groove-shaped cavities 9101 arranged sequentially from top to bottom. The number of groove-shaped cavities 9101 is equal to the number of secondary core-pulling modules. The guide block 95 in each secondary core-pulling module is movably embedded in a corresponding groove-shaped cavity 9101. On the bottom surface of each groove-shaped cavity 9101, there are several countersunk holes 9102 arranged sequentially from top to bottom. The number of countersunk holes 9102 is equal to the number of core-pulling rods 97 in each secondary core-pulling module. A through hole 9103 is opened at the center of the bottom surface of each countersunk hole 9102. Each core-pulling rod 97 is inserted into a corresponding through hole 9103.

[0042] Each core-pulling rod 97 is also fitted with a spring 98 located between the guide block 95 and the slider 91. The end of the spring 98 near the positioning core block 6 is embedded in the countersunk hole 9102, and the end of the spring 98 away from the positioning core block 6 is pressed against the guide block 95 so that the core-pulling rod 97 always has the tendency to translate in the direction away from the positioning core block 6.

[0043] Working principle:

[0044] The end plate 1 and the bottom plate 7 are respectively installed on the action mechanism and the machine body of the injection molding machine. The action mechanism drives the end plate 1 to move backward, and then the material distribution block 2 drives the molding module 3 to move towards the auxiliary module 5 until the two are joined together (existing technology).

[0045] During the movement of the molding module 3, the active core block 4 in the mold core moves synchronously until the end face of the active core block 4 and the end face of the positioning core block 6 are engaged with each other. This causes the end faces of the two first molding protrusions 41 on the active core block 4 to engage with the end faces of the two second molding protrusions 61 on the positioning core block 6. Simultaneously, during the movement of the molding module 3, each traction post 94 in each core-pulling assembly 9 moves backward, thereby forcing each slider 91 to move towards the positioning core block 6, thus driving the first side molding block 92 and the second side molding block 93 to move synchronously. In addition, during the movement of the molding module 3, each driving block 96 moves towards the positioning core block 6 by means of the cooperation between each second guide slope 34 and a corresponding first guide slope 961. This, in turn, drives each core-pulling rod 97 towards the positioning core block 6 by means of the guide block 95, until the end of each core-pulling rod 97 is inserted into a corresponding fastener notch 44.

[0046] Next, the molten material enters between each third forming notch 63 and a corresponding first forming notch 43 and between each fourth forming notch 62 and a corresponding second forming notch 42 through the gate in the end plate 1 and the sprue in the material distribution block 2. After cooling, four light guide strips are formed. Then, the end plate 1 is driven to move forward by the action mechanism, which in turn drives the forming module 3 to move forward and away from the auxiliary module 5, thereby driving the active core block 4 to move synchronously and away from the positioning core block 6. Finally, the forming light guide strips are pushed forward by the ejector mechanism 8 (existing technology).

[0047] This invention utilizes a two-stage core-pulling module to simultaneously mold each snap ring during the injection molding process of the main structure of the light guide strip, eliminating the need for a separate drilling process. This simplifies the production process, saving time and effort. At the same time, it significantly reduces the positional error of the snap rings to ensure subsequent assembly and effectively prevents scrap.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An injection mold for an automotive light guide strip, comprising a molding module and an auxiliary module respectively arranged front to rear and cooperating with each other, a material distribution block fixed to the front side of the molding module, an end plate fixed to the front side of the material distribution block, a base plate fixed to the rear side of the auxiliary module, an ejector mechanism disposed between the base plate and the auxiliary module, and a mold core disposed between the molding module and the auxiliary module, characterized in that: The mold core includes an active core block and a positioning core block respectively embedded in the rear side of the molding module and the front side of the auxiliary module and cooperating with each other, as well as two core-pulling components disposed between the active core block and the positioning core block and distributed in a centrally symmetrical manner. On the end face of the active core block, two first forming protrusions are formed in a vertically arranged and centrally symmetrically distributed manner in the direction of the positioning core block. Correspondingly, on the end face of the positioning core block, two second forming protrusions are formed in a vertically arranged and centrally symmetrically distributed manner in the direction of the active core block, and each of them cooperates with the two first forming protrusions. The core-pulling assembly includes a slider movably connected to the front of the auxiliary module to have left and right translation function, a number of traction columns that are inclined and interspersed in the slider and arranged in parallel from top to bottom, and a first side molding block and a second side molding block that are fixed on the outer wall of the slider near the positioning core block and respectively arranged vertically. The front end of each traction column is fixed on the molding module. The slider is also provided with several secondary core-pulling modules arranged sequentially from top to bottom. Each secondary core-pulling module includes a guide block movably embedded in the side of the slider away from the positioning core block to enable left and right elastic movement, several core-pulling rods horizontally fixed on the outer wall of the guide block facing the positioning core block and arranged in parallel from top to bottom, and a drive block fixed on the outer wall of the guide block away from the positioning core block. The end of each core-pulling rod passes through the slider and is inserted into the first side molding block or the second side molding block.

2. The injection mold for an automotive light guide strip according to claim 1, characterized in that, Each of the first molding protrusions has a first molding notch and a second molding notch on the left and right sides of its end face, respectively. Correspondingly, each of the positioning core blocks has a third molding notch and a fourth molding notch on the left and right sides of its end face, respectively. Each of the third molding notch and each of the fourth molding notch cooperates with a corresponding first molding notch and a corresponding second molding notch.

3. The injection mold for an automotive light guide strip according to claim 1, characterized in that, The molding module has a mold cavity on its rear side, and the active core block is embedded in the mold cavity. A stepped groove is formed on the inner wall of both the left and right sides of the mold cavity. A number of guide grooves are formed on the inner wall of each stepped groove, arranged sequentially from top to bottom. The number of guide grooves is equal to the number of secondary core pulling modules. The driving block in each secondary core pulling module is movably set in a corresponding guide groove.

4. The injection mold for an automotive light guide strip according to claim 3, characterized in that, A first guide slope is formed on the outer wall of each drive block on the side away from the positioning core block. Correspondingly, a second guide slope is formed on the inner wall of each guide groove, which cooperates with the first guide slope.

5. The injection mold for an automotive light guide strip according to claim 2, characterized in that, A first corner groove is formed on the outer wall of the first side molding block facing the positioning core block, and a second corner groove is formed on the outer wall of the second side molding block facing the positioning core block. Several first snap-fit ​​grooves are formed at the edges of the openings of both the first and second corner grooves, arranged sequentially from top to bottom. Correspondingly, several second snap-fit ​​grooves are formed at the outer edge of the bottom surface of each of the third and fourth molding notches, arranged sequentially from top to bottom. The number and position of the first snap-fit ​​grooves on the first corner grooves are matched with the number and position of the second snap-fit ​​grooves on the fourth molding notch, and the number and position of the first snap-fit ​​grooves on the second corner grooves are matched with the number and position of the second snap-fit ​​grooves on the third molding notch.

6. The injection mold for an automotive light guide strip according to claim 5, characterized in that, On the outer wall of the first side molding block facing the positioning core block and on the outer wall of the second side molding block facing the positioning core block, a number of recessed holes are provided in sequence from top to bottom. A boss is formed outward from the center of the bottom surface of each recessed hole, and a boss is formed outward from the center of the end of each boss.

7. The injection mold for an automotive light guide strip according to claim 6, characterized in that, Each of the first molding notch and each of the second molding notch openings has several fastener notches arranged sequentially from top to bottom at its edge. The number and position of the recesses on the first side molding block are matched with the number and position of the fastener notches on the second molding notch, and the number and position of the recesses on the second side molding block are matched with the number and position of the fastener notches on the first molding notch.

8. The injection mold for an automotive light guide strip according to claim 2, characterized in that, Each of the third and fourth molding notches has multiple serrated grooves that are evenly spaced from top to bottom on its inner wall.

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