Injection molding device for thick-wall light guide and injection molding method for thick-wall light guide

Abstract

The present application relates to the technical field of injection molding. Disclosed are an injection molding device for a thick-wall light guide and an injection molding method for the thick-wall light guide. The injection molding device comprises an injection assembly, a fixed mold and a movable mold, wherein the injection assembly is configured to melt and inject plastic raw materials; the fixed mold has at least two injection stations in a horizontal direction, and the injection assembly injects the plastic raw materials at the injection stations; the movable mold is provided with a rotary disk assembly, wherein the rotary disk assembly is configured to drive a molding mold to rotate by a fixed angle each time to form N groups of molding stations, and the injection stations are configured to supply the plastic raw materials to each group of molding stations to respectively form each layer of a structure of the thick-wall light guide; and a thick-wall light guide layer formed on an Nth group of molding stations covers the thick-wall light guide layer formed on the (N-1)th molding station and is integrated with the thick-wall light guide layer, and the Nth group of molding stations is configured to form an Nth thick-wall light guide layer.

Description

Thick-wall light guide part injection molding device and thick-wall light guide part injection molding method

[0001] This application claims priority to Chinese patent application No. 202311666599.8 filed on December 6, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of injection molding technology, and in particular to a thick-walled light guide component injection molding device and a thick-walled light guide component injection molding method. Background Art

[0003] Thick-walled light guides, which direct and diffuse light from a light source in all directions, are increasingly used in a wide range of products. For example, in automobiles, thick-walled light guides are crucial components in headlights, directing light from the light source into parallel beams to meet the lighting requirements.

[0004] Thick-walled light guides are typically molded using injection molding. To shorten the molding cycle, these components are typically molded in layers. The greater the number of layers, the shorter the molding cycle and the higher the production efficiency. Currently, commonly used two-shot injection molding machines can only mold thick-walled light guides in two separate layers, resulting in minimal improvement in production efficiency. Technical issues

[0005] The purpose of the present application is to provide a thick-walled light guide injection molding device, aiming to solve the technical problems of the current thick-walled light guide injection molding method having a limited number of layers and an insignificant improvement in production efficiency. Technical Solutions

[0006] In order to achieve its purpose, the technical solutions adopted in this application are as follows:

[0007] A thick-walled light guide injection molding device, the thick-walled light guide injection molding device comprising:

[0008] Injection assembly, used to melt and inject plastic raw materials;

[0009] A fixed mold, wherein the fixed mold is provided with at least two injection stations in a horizontal direction, and the injection assembly is used to inject plastic raw materials into the at least two injection stations;

[0010] A movable mold, wherein the movable mold is provided with a turntable assembly, on which a forming mold is mounted, and the turntable assembly is used to drive the forming mold to rotate a fixed angle each time to form N sets of forming stations; wherein N is a natural number greater than 1, and the cumulative rotation angle of the turntable assembly is 360°;

[0011] The at least two injection stations are used to supply plastic raw materials to each group of the molding stations to form each layer structure of the thick-walled light guide component respectively. The thick-walled light guide component layer formed on the molding stations of the Nth group covers the thick-walled light guide component layer formed on the molding stations of the N-1th group and is integrated into one. The molding stations of the Nth group are used to form the Nth layer of thick-walled light guide components.

[0012] Furthermore, the N groups of molding stations are respectively provided with a first mold cavity to an Nth mold cavity, and the first mold cavity to the Nth mold cavity are respectively used to mold a layer structure of a thick-walled light guide component, and the at least two injection stations inject plastic raw materials into the first mold cavity to the Nth mold cavity through the hot runner of the molding mold.

[0013] Furthermore, the depth of the first mold cavity gradually increases to the depth of the Nth mold cavity.

[0014] Furthermore, the injection assembly includes a first injection mechanism and a second injection mechanism, and the injection station includes a first injection station and a second injection station; the first injection mechanism is used to inject plastic raw materials into the first injection station, and the second injection mechanism is used to inject plastic raw materials into the second injection station;

[0015] The first injection station is connected to the first group of molding stations and the Nth group of molding stations, and the second injection station is connected to the second group of molding stations to the N-1th group of molding stations.

[0016] Furthermore, the first group of forming stations to the Nth group of forming stations are evenly distributed along the circumferential direction.

[0017] Furthermore, each layer of the thick-walled light guide member rotates with the turntable assembly.

[0018] Furthermore, the turntable assembly includes a turntable body, a drive assembly and a positioning assembly; the molding mold is installed on the turntable body, the drive assembly is connected to the turntable body, and the drive assembly is used to drive the turntable body to rotate; the positioning assembly is used to abut against the turntable body when the turntable body rotates to a preset position to prevent the turntable body from rotating.

[0019] Correspondingly, the present application also proposes a method for injection molding a thick-walled light guide, which is performed using the aforementioned thick-walled light guide injection molding device;

[0020] The thick-wall light guide component injection molding method comprises the following steps:

[0021] S1, injecting molten plastic material into the first group of molding stations through the injection assembly to form a first thick-walled light guide layer;

[0022] S2, driving the forming mold to rotate m° along a first direction via the turntable assembly;

[0023] S3, injecting molten plastic material into the M+1th group of molding stations through the injection assembly to form the M+1th layer of thick-walled light guide components; wherein M is the current cumulative number of rotations of the turntable assembly;

[0024] S4, repeat the above steps S2 to S3 until M+1=N.

[0025] Furthermore, the N groups of molding stations are respectively provided with a first mold cavity to an Nth mold cavity, the first mold cavity to the Nth mold cavity are respectively used to mold a layer structure of the thick-walled light guide component, and the at least two injection stations inject plastic raw materials into the first mold cavity to the Nth mold cavity through a hot runner of the molding mold; the depth of the first mold cavity to the Nth mold cavity gradually increases; each layer of the thick-walled light guide component rotates with the turntable assembly;

[0026] In step S1, the injection assembly is used to inject molten plastic material into the first group of molding stations, including:

[0027] S11, injecting molten plastic material into the first mold cavity through the injection assembly;

[0028] In step S3, the injection assembly is used to inject molten plastic material into the M+1 group of molding stations, including:

[0029] S31, injecting molten plastic material into the first mold cavity through the injection assembly, and injecting molten plastic material into the mold cavities from the second mold cavity to the Nth mold cavity where the thick-walled light guide layer exists.

[0030] Furthermore, the first mold cavity to the Nth mold cavity are evenly distributed along the circumferential direction;

[0031] In step S4, the above steps S2 to S3 are repeatedly performed until M+1=N, including:

[0032] S5, taking out the finished thick-walled light guide component from the Nth mold cavity;

[0033] S6, driving the molding die to rotate m° in a first direction by the turntable assembly, and then injecting molten plastic material into the first mold cavity to the Nth mold cavity by the injection assembly;

[0034] S7, repeat the above steps S5 to S6. Beneficial effects

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] The thick-walled light guide component injection molding device proposed in the present application can form multiple molding stations by arranging a turntable assembly on the movable mold and using the turntable assembly to drive the mold to rotate relative to the fixed mold. In this way, the injection assembly can be used to inject molten plastic raw materials into each molding station through the injection station on the fixed mold. Each time the molding mold rotates at a fixed angle, an injection is performed. Each injection can form a layer of thick-walled light guide components on the molding mold. When the molding mold rotates N times at a fixed angle, a thick-walled light guide component finished product with N layers of thick-walled light guide components can be formed on the molding mold. In this way, multi-layer injection molding of thick-walled light guide components is realized, which is not limited to the traditional two-layer injection molding method, thereby shortening the overall molding cycle and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0038] FIG1 is a schematic diagram of the overall structure of an embodiment of an injection molding device for thick-walled light guide components of the present application;

[0039] FIG2 is a schematic structural diagram of a fixed mold in one embodiment of an injection molding apparatus for thick-walled light guide components of the present application;

[0040] FIG3 is a schematic structural diagram of an injection assembly in one embodiment of an injection molding apparatus for thick-walled light guide components of the present application;

[0041] FIG4 is a schematic structural diagram of a turntable assembly in one embodiment of the thick-walled light guide component injection molding device of the present application;

[0042] FIG5 is a schematic diagram of the injection molding process of an embodiment of the injection molding method of a thick-walled light guide member of the present application;

[0043] FIG6 is a schematic diagram of the operating steps of an embodiment of a method for injection molding a thick-walled light guide member of the present application;

[0044] FIG. 7 is a schematic diagram showing the operating steps of another embodiment of the thick-walled light guide component injection molding method of the present application.

[0045] Description of Figure Numbers:

[0046] Reference number name Reference number name 1 First thick-wall light guide layer 110 First injection mechanism 2 Second thick-wall light guide layer 120 Second injection mechanism 3 Third thick-wall light guide layer 210 Injection station 4 Fourth thick-wall light guide layer 211 First injection station 5 Fifth thick-wall light guide layer 212 Second injection station 6 Sixth thick-wall light guide layer 410 Turntable body 100 Injection assembly 420 Driving assembly 200 Fixed mold 430 Positioning assembly 300 Moving mold 610 Fixed mold 400 Turntable assembly 620 Moving mold 500 Machine table 611 Fixed mold cavity 600 Molding mold 621 Moving mold cavity

[0047] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0048] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0051] The present invention provides a thick-walled light guide component injection molding device. Referring to FIG. 1 and FIG. 2 , the thick-walled light guide component injection molding device includes an injection assembly 100 , a fixed mold 200 , and a movable mold 300 .

[0052] The injection assembly 100 is used to melt and inject plastic raw materials;

[0053] The fixed mold 200 is provided with at least two injection stations 210 in the horizontal direction, and the injection assembly 100 is used to inject plastic raw materials into the at least two injection stations 210;

[0054] The movable mold 300 is provided with a turntable assembly 400, on which a forming mold 600 is mounted. The turntable assembly 400 is used to drive the mold 620 to rotate a fixed angle each time to form N sets of forming stations; wherein N is a natural number greater than 1, and the cumulative rotation angle of the turntable assembly 400 is 360°;

[0055] At least two injection stations 210 are used to supply plastic raw materials to each group of molding stations to form each layer structure of the thick-walled light guide component respectively. The thick-walled light guide component layer formed on the Nth group of molding stations covers the thick-walled light guide component layer formed on the N-1th group of molding stations and is integrated into one. The Nth group of molding stations is used to form the Nth layer of thick-walled light guide component.

[0056] The thick-walled light guide component injection molding apparatus provided in this embodiment can be used on an injection molding machine. The fixed mold 200 and movable mold 300 may refer to the fixed platen and movable platen, respectively, of the injection molding machine. The injection assembly 100 may include a needle valve assembly and a shooting platform assembly. The shooting platform assembly is mounted on a machine platform 500 of the injection molding machine and connected to the needle valve assembly. The needle valve assembly communicates with each injection station 210. The shooting platform assembly can simultaneously inject molten plastic material into at least two injection stations 210 through the needle valve assembly.

[0057] It should be noted that the positions of the molding stations are fixed and do not change with the rotation of the molding mold 600. The molding mold 600 is provided with corresponding molding cavities. Since the positions of the molding stations are fixed, for any molding cavity, each time the molding mold 600 rotates by a fixed angle driven by the turntable assembly 400, the molding cavity will move from one molding station group to the next molding station group as the molding mold 600 rotates. The injection station 210 supplies plastic material to the molding stations, which can be understood as the injection station 210 supplying plastic material to the molding cavity located in that molding station.

[0058] Based on the above arrangement, when a plurality of molding cavities are provided on the molding mold 600, any or all of the molding cavities can correspond one-to-one to the above-mentioned molding stations; after the injection assembly 100 supplies the plastic raw materials to each molding station for the first time through the injection station 210, a thick-walled light guide layer can be formed in each molding cavity corresponding to each molding station; after the thick-walled light guide layer is cooled, the turntable assembly 400 drives the mold 620 to rotate a fixed angle, so that each molding cavity moves to the next group of molding stations, and then the injection assembly 100 continues to supply the plastic raw materials to each molding station for the second time through the injection station 210; since a thick-walled light guide layer has been injection-molded in the molding cavity, with the second supply of plastic raw materials, a second thick-walled light guide layer can be formed in each molding cavity, and the second thick-walled light guide layer covers the surface of the previous thick-walled light guide layer; as the thick-walled light guide layer is cooled, the second thick-walled light guide layer will be aligned with the previous thick-walled light guide layer. The layers of thick-walled light guide components are integrated into one; the turntable assembly 400 continues to drive the mold 620 to rotate a fixed angle in the same direction, so that each molding cavity moves to the next group of molding stations, and then the injection assembly 100 continues to supply plastic raw materials to each molding station for the third time through the injection station 210; since two layers of thick-walled light guide components have been injection-molded in the molding cavity, with the third supply of plastic raw materials, a third layer of thick-walled light guide components can be formed in each molding cavity, and the third layer of thick-walled light guide components covers the surface of the first two layers of thick-walled light guide components; as the thick-walled light guide components are cooled, the third layer of thick-walled light guide components will be integrated with the first two layers of thick-walled light guide components; the turntable assembly 400 continues to drive the mold 620 to rotate a fixed angle in the same direction and repeats the above-mentioned layered injection molding operation until a thick-walled light guide product containing N layers of thick-walled light guide components is molded in the molding cavity of the Nth group of molding stations, at which time the thick-walled light guide product can be taken out of the molding cavity.

[0059] After each thick-walled light guide layer is injection-molded, it can be held under pressure to prevent backflow of the injected plastic material and deformation of the product. Furthermore, the shape of each thick-walled light guide layer can vary to meet the overall shape requirements of the product.

[0060] It should be noted that, based on the thick-walled light guide component injection molding device provided in this embodiment, the thick-walled light guide component can be divided into two or more layers for separate injection molding, for example, it can be divided into six layers, seven layers, eight layers, etc. Compared with the existing two-color injection molding machine, the number of layers is greater and the thickness of each layer is correspondingly reduced, so the cooling time required after each layer is injected is shortened; in this way, the injection station 210 can be set to two or more, and through the mutual cooperation of multiple injection stations 210, the rapid supply of molten plastic raw materials can be achieved, thereby improving the injection molding efficiency.

[0061] The above injection molding process is only used to illustrate the molding principle of the thick-walled light guide component injection molding device in this embodiment. In actual application, the operation process can be adaptively adjusted based on the injection molding requirements. It is only necessary to finally complete the multi-layer injection molding process of the thick-walled light guide component and obtain the finished thick-walled light guide component. No specific limitation is made here.

[0062] It can be seen that the thick-walled light guide component injection molding device provided in this embodiment can form multiple groups of molding stations by setting a turntable assembly 400 on the movable mold 300 and using the turntable assembly 400 to drive the mold 620 to rotate relative to the fixed mold 200. In this way, the injection assembly 100 can be used to inject molten plastic raw materials into each molding station through the injection station 210 on the fixed mold 200. Each time the molding mold 600 rotates at a fixed angle, an injection is performed. Each injection can form a layer of thick-walled light guide components on the molding mold 600; when the molding mold 600 rotates at a fixed angle N times, a thick-walled light guide component finished product with N layers of thick-walled light guide components can be formed on the molding mold 600; in this way, multi-layer injection molding of thick-walled light guide components is realized, which is not limited to the traditional two-layer injection molding method, thereby shortening the overall molding cycle and reducing production costs.

[0063] In one embodiment, referring to Figures 1 and 2, N groups of molding stations are respectively provided with a first mold cavity to an Nth mold cavity, and the first mold cavity to the Nth mold cavity are respectively used to mold a layer structure of a thick-walled light guide component, and at least two injection stations 210 inject plastic raw materials into the first mold cavity to the Nth mold cavity through the hot runner of the molding mold 600.

[0064] In one embodiment, referring to FIG. 1 and FIG. 2 , the depth of the first mold cavity gradually increases to the depth of the Nth mold cavity.

[0065] In one embodiment, referring to FIG. 1 and FIG. 2 , each thick-walled light guide layer rotates with the turntable assembly 400 .

[0066] Specifically, the first mold cavity to the Nth mold cavity in this embodiment can correspond to the molding cavities on the molding mold 600 in the above-mentioned embodiment; the depth of the first mold cavity to the depth of the Nth mold cavity gradually increases, which should be understood as the depth of the mold cavity in one or more directions gradually increases, so that the shape of each mold cavity matches the outer contour of the thick-walled optical waveguide layer that needs to be molded in the mold cavity.

[0067] In actual application, since the molding mold 600 generally includes a fixed mold 610 and a movable mold 620, wherein the fixed mold 610 is fixed on the fixed mold 200 and the movable mold 620 is fixed on the movable mold 300, the mold cavity may include a fixed mold cavity 611 provided on the fixed mold 610 and a movable mold cavity 621 provided on the movable mold 620. When the fixed mold 610 and the movable mold 620 are closed, the fixed mold cavity 611 can be enclosed with the movable mold cavity 621 to form a complete mold cavity for injection molding. Based on this structural setting, the depth of the first mold cavity gradually increases to the depth of the Nth mold cavity, which should be understood as the depth of the fixed mold cavity 611 gradually increasing. In this way, the specific injection molding process of the thick-walled light guide is as follows:

[0068] In the initial state, no plastic is injected into any of the mold cavities. First, the fixed mold 610 and the movable mold 620 are molded together. Then, the plastic raw material is injected into the shallowest first mold cavity through the injection station 210, and the pressure is maintained and cooled to form the first thick-walled light guide layer 1 in the first mold cavity. Then, the fixed mold 610 and the movable mold 620 are separated, and the movable mold 620 is driven to rotate a fixed angle by the turntable assembly 400, so that the first thick-walled light guide layer 1 moves with the movable mold cavity 621 to the second group of molding stations, and then the fixed mold 610 and the movable mold 620 are molded together. After the mold is closed, the mold cavity where the first thick-walled light guide layer 1 is located constitutes the second mold cavity. Since the second mold cavity is deeper, an injection molding area is formed between the cavity wall of the second mold cavity and the first thick-walled light guide layer 1. The shape of the injection molding area corresponds to the outer contour of the subsequent second thick-walled light guide layer 2, and the mold cavity at the first group of molding stations is still the first mold cavity. At this time, the first mold cavity and the second mold cavity are respectively filled with plastic raw materials through the injection station 210, and the pressure is maintained and cooled to form the first thick-walled light guide layer 1 in the first mold cavity and the second thick-walled light guide layer 2 in the second mold cavity. The second thick-walled light guide layer 2 in the second mold cavity covers the surface of the first thick-walled light guide layer 1 and is integrated with it. Then the fixed mold 610 and the movable mold 620 are separated, and the movable mold 620 is driven to rotate in the same direction by a fixed angle through the turntable assembly 400, so that the two layers of thick-walled light guide components of the second molding station are moved to the third molding station with the movable mold cavity 621, and the one layer of thick-walled light guide components of the first molding station is moved to the second molding station with the movable mold cavity 621, and then the fixed mold 610 and the movable mold 620 are closed; after closing the mold, the mold cavity where the two layers of thick-walled light guide components on the third molding station are located constitutes the third mold cavity. Since the depth of the third mold cavity is deeper, an injection molding is formed between the cavity wall of the third mold cavity and the two layers of thick-walled light guide components. region, the shape of which corresponds to the outer contour of the subsequent third thick-walled light guide layer 3; at this time, the first mold cavity, the second mold cavity, and the third mold cavity are respectively filled with plastic raw materials through the injection station 210, and the pressure is maintained and cooled, so as to form the first thick-walled light guide layer 1 in the first mold cavity, the second thick-walled light guide layer 2 in the second mold cavity, and the third thick-walled light guide layer 3 in the third mold cavity, wherein the third thick-walled light guide layer 3 in the third mold cavity covers the surfaces of the first two thick-walled light guide layers and is integrated therewith, and the second thick-walled light guide layer 2 in the second mold cavity covers the surface of the first thick-walled light guide layer 1 and is integrated therewith;Then continue to separate the molds and drive the movable mold 620 to rotate a fixed angle in the same direction through the turntable assembly 400 to repeat the above injection molding operation until the first mold cavity to the Nth mold cavity are all filled with plastic raw materials. At this time, N layers of thick-walled light guide layers are formed in the Nth mold cavity, and the N layers of thick-walled light guide layers constitute the finished thick-walled light guide. After the fixed mold 610 and the movable mold 620 are separated from the mold, the finished thick-walled light guide can be taken out from the movable mold cavity 621 corresponding to the Nth molding station, thus completing the layered injection molding process of a thick-walled light guide. After that, the movable mold 620 can continue to be driven by the turntable assembly 400 to rotate a fixed angle in the same direction to make The N-1th layer of thick-walled light guide components on the N-1th molding station is moved to the Nth molding station. The mold is then closed and the above injection molding operation is repeated, so that the Nth layer of thick-walled light guide components in the Nth mold cavity covers the surface of the previous N-1th layer of thick-walled light guide components and becomes one with them. At this point, the layered injection molding process of another thick-walled light guide component is completed in the Nth mold cavity. The mold can be separated and the finished thick-walled light guide component can be removed from the movable mold cavity 621 corresponding to the Nth molding station. The above injection molding operation can be repeated subsequently, and each rotation of the turntable assembly 400 produces a finished thick-walled light guide component. This allows for convenient layered injection molding and continuous production of thick-walled light guide components.

[0069] The operation of removing the finished thick-walled light guide component from the movable mold cavity 621 can be achieved with the aid of a ejection mechanism or a mechanical clamp, which is not limited here.

[0070] In one embodiment, referring to FIG. 1 and FIG. 2 , the first group of forming stations to the Nth group of forming stations are evenly distributed along the circumferential direction.

[0071] Based on the previous embodiment, when the first to Nth molding stations are evenly distributed along the circumference, the rotation angle of the turntable assembly 400 is 360° / N each time. The thick-walled light guide component injection molding apparatus begins operation from an initial state according to the injection molding process of the previous embodiment. When the first to Nth mold cavities are filled with plastic material for the first time, it indicates that the turntable assembly 400 has rotated one circle. After the finished thick-walled light guide component is removed from the movable mold cavity 621 corresponding to the Nth molding station, the movable mold cavity 621 becomes empty. At this time, the turntable assembly 400 continues to drive the movable mold 620 to rotate a fixed angle, returning the empty movable mold cavity 621 to the first molding station to enter the next injection molding cycle. Subsequently, the above-mentioned injection molding process of mold closing, injection molding, mold separation, material removal, and rotation only needs to be repeated, and after each subsequent mold closing, it is only necessary to fill all mold cavities with plastic material. Based on the circumferential arrangement of the molding stations in this embodiment, the rotation cycle characteristics of the turntable assembly 400 can be fully utilized to achieve cyclic injection molding production of thick-walled light guide components in a smaller space.

[0072] In one embodiment, referring to FIG1 to FIG3 , the injection assembly 100 includes a first injection mechanism 110 and a second injection mechanism 120 , and the injection station 210 includes a first injection station 211 and a second injection station 212 ; the first injection mechanism 110 is used to inject plastic raw materials into the first injection station 211 , and the second injection mechanism 120 is used to inject plastic raw materials into the second injection station 212 ;

[0073] The first injection station 211 is connected to the first group of molding stations and the Nth group of molding stations, and the second injection station 212 is connected to the second group of molding stations to the N-1th group of molding stations.

[0074] In this embodiment, different injection molding parameters can be set for the first injection mechanism 110 and the second injection mechanism 120 to meet the injection molding requirements of each thick-walled light guide layer. Specifically, the injection molding parameters may include injection pressure, etc. For example, if both the first injection mechanism 110 and the second injection mechanism 120 include a needle valve body, the injection pressure of the needle valve body of the first injection mechanism 110 can be set to pressure A, and the injection pressure of the needle valve body of the second injection mechanism 120 can be set to pressure B. When a thick-walled light guide layer requires injection pressure A, the first injection mechanism 110 is used for injection molding; when a thick-walled light guide layer requires injection pressure B, the second injection mechanism 120 is used for injection molding.

[0075] For example, when the thick-walled light guide is divided into six layers for injection molding, the first layer is located at the bottom and the sixth layer is located at the top. The first layer and the sixth layer together wrap the second layer, the third layer, the fourth layer, and the fifth layer. The injection molding parameters of the first layer and the sixth layer are the same, and the injection molding parameters of the second layer, the third layer, the fourth layer, and the fifth layer are the same. In this way, the first layer and the sixth layer can be injection molded by the first injection mechanism 110, and the second to fifth layers can be injection molded by the second injection mechanism 120, thereby eliminating the parameter adjustment operation, improving the injection molding efficiency, and shortening the product molding cycle.

[0076] In one embodiment, referring to Figures 1 to 4, the turntable assembly 400 includes a turntable body 410, a drive assembly 420 and a positioning assembly 430; the molding die 600 is mounted on the turntable body 410, the drive assembly 420 is connected to the turntable body 410, and the drive assembly 420 is used to drive the turntable body 410 to rotate; the positioning assembly 430 is used to abut against the turntable body 410 when the turntable body 410 rotates to a preset position to prevent the turntable body 410 from rotating.

[0077] Specifically, the driving assembly 420 may include a servo driver and a servo motor. The servo driver controls the rotation of the servo motor through electrical signals, and the servo motor then drives the turntable body 410 to rotate through gears, thereby ensuring that the turntable body 410 accurately rotates to a preset angle.

[0078] Positioning slots compatible with the positioning assembly 430 can be provided on the turntable body 410 or on a device that rotates synchronously with the turntable body 410. The number of positioning slots matches the number of molding stations and is evenly distributed along the circumference. When the turntable body 410 rotates to a preset angle, the positioning assembly 430 can be inserted into the corresponding positioning slot, locking the turntable body 410 and preventing it from rotating. This allows for precise and stable injection molding. When one layer is completed and the next layer is ready, the positioning assembly 430 can be disengaged from the positioning slot, allowing the turntable body 410 to rotate.

[0079] Furthermore, the positioning assembly 430 may include a telescopic member and a latch; the telescopic member has a fixed end and a telescopic end, the fixed end being mounted on the base of the injection molding machine, and the telescopic end being retracted toward the positioning slot; the latch is connected to the telescopic end. The extension and retraction of the latch can be controlled by the telescopic end. When the telescopic end controls the latch to extend, the latch inserts into the positioning slot, locking the turntable body 410, and injection molding can now proceed. When switching is required, the latch is first retracted by controlling the telescopic end to rotate the movable mold plate to a fixed angle, and then the telescopic member controls the latch to insert into the positioning slot, locking the turntable body 410. Based on the above arrangement, the molding mold 600 can be kept stable during the injection molding process, improving the injection molding effect of thick-walled light guide parts.

[0080] The telescopic member may include a hydraulic cylinder, a pneumatic cylinder or an electric telescopic rod, etc., and only needs to realize the function of linear driving, which is not limited here.

[0081] Correspondingly, referring to FIG1 , FIG2 , FIG5 and FIG6 , the embodiment of the present application further provides a method for injection molding a thick-walled light guide, which is performed using the thick-walled light guide injection molding device in any of the above embodiments;

[0082] The thick-wall light guide component injection molding method comprises the following steps:

[0083] S1, injecting molten plastic material into a first group of molding stations through an injection assembly 100 to form a first thick-walled light guide layer 1;

[0084] S2, driving the mold 620 to rotate m° along the first direction via the turntable assembly 400;

[0085] S3, injecting molten plastic material into the M+1th forming station through the injection assembly 100 to form the M+1th thick-walled light guide layer; wherein M is the current cumulative number of rotations of the turntable assembly 400;

[0086] S4, repeat the above steps S2 to S3 until M+1=N.

[0087] In this embodiment, after the injection assembly 100 supplies the plastic raw material to each molding station for the first time through the injection station 210, a thick-walled light guide layer can be formed in each molding cavity corresponding to each molding station; after the thick-walled light guide layer is cooled, the turntable assembly 400 drives the mold 620 to rotate m° along the first direction, so that each molding cavity moves to the next group of molding stations, and then the injection assembly 100 continues to supply the plastic raw material to each molding station for the second time through the injection station 210; since a thick-walled light guide layer has been injection-molded in the molding cavity, with the second supply of plastic raw material, a second thick-walled light guide layer can be formed in each molding cavity, and the second thick-walled light guide layer covers the surface of the previous thick-walled light guide layer; as the thick-walled light guide layer is cooled, the second thick-walled light guide layer will be integrated with the previous thick-walled light guide layer; the turntable assembly 4 00 continues to drive the mold 620 to rotate m° along the first direction, so that each molding cavity moves to the next group of molding stations, and then the injection assembly 100 continues to supply plastic raw materials to each molding station for the third time through the injection station 210; since two layers of thick-walled light guide layers have been injection-molded in the molding cavity, with the third supply of plastic raw materials, a third layer of thick-walled light guide layers can be formed in each molding cavity, and the third layer of thick-walled light guide layers covers the surface of the first two layers of thick-walled light guide layers; as the thick-walled light guide layers are cooled, the third layer of thick-walled light guide layers will be integrated with the first two layers of thick-walled light guide layers; the turntable assembly 400 continues to drive the mold 620 to rotate m° along the first direction and repeats the above-mentioned layered injection molding operation until a thick-walled light guide finished product containing N layers of thick-walled light guide layers is molded in the molding cavity of the Nth group of molding stations, and the thick-walled light guide finished product can be taken out of the molding cavity at this time.

[0088] It can be seen that the thick-walled light guide component injection molding method provided in this embodiment can form multiple molding stations by setting a turntable assembly 400 on the movable mold 300 and using the turntable assembly 400 to drive the mold 620 to rotate relative to the fixed mold 200. In this way, the injection assembly 100 can be used to inject molten plastic raw materials into each molding station through the injection station 210 on the fixed mold 200. Each time the molding mold 600 rotates at a fixed angle, an injection is performed. Each injection can form a layer of thick-walled light guide components on the molding mold 600. When the molding mold 600 rotates at a fixed angle N times, a thick-walled light guide component finished product with N layers of thick-walled light guide components can be formed on the molding mold 600. In this way, multi-layer injection molding of thick-walled light guide components is realized, which is not limited to the traditional two-layer injection molding method, thereby shortening the overall molding cycle and reducing production costs.

[0089] In one embodiment, referring to FIG1 , FIG2 , FIG5 , and FIG7 , N molding stations are respectively provided with first to Nth mold cavities, each of which is used to mold a layer of a thick-walled light guide component. At least two injection stations 210 inject plastic material into the first to Nth mold cavities through a hot runner of a molding mold 600 . The depth of the first to Nth mold cavities gradually increases. Each layer of the thick-walled light guide component rotates with the turntable assembly 400 .

[0090] In step S1, molten plastic material is injected into the first set of molding stations through the injection assembly 100, including:

[0091] S11, injecting molten plastic material into the first mold cavity through the injection assembly 100;

[0092] In step S3, the molten plastic material is injected into the M+1th forming station through the injection assembly 100, including:

[0093] S31 , injecting molten plastic material into the first mold cavity through the injection assembly 100 , and injecting molten plastic material into the mold cavities from the second mold cavity to the Nth mold cavity where the thick-walled light guide layer exists.

[0094] In one embodiment, referring to FIG1 , FIG2 , FIG5 and FIG7 , the first mold cavity to the Nth mold cavity are evenly distributed along the circumferential direction;

[0095] In step S4, the above steps S2 to S3 are repeated until M+1=N, including:

[0096] S5, taking out the finished thick-walled light guide component from the Nth mold cavity;

[0097] S6, the mold 620 is rotated m° in the first direction by the turntable assembly 400, and then the molten plastic material is injected into the first cavity to the Nth cavity by the injection assembly 100;

[0098] S7, repeat the above steps S5 to S6.

[0099] In this embodiment, the depth of the first mold cavity gradually increases to the depth of the Nth mold cavity, which should be understood as the depth of the mold cavity gradually increases in one or more directions so that the shape of each mold cavity matches the outer contour of the thick-walled optical waveguide layer that needs to be molded in the mold cavity.

[0100] In actual application, since the molding mold 600 generally includes a fixed mold 610 and a movable mold 620, wherein the fixed mold 610 is fixed to the fixed mold 200 and the movable mold 620 is fixed to the movable mold 300, the mold cavity may include a fixed mold cavity 611 provided on the fixed mold 610 and a movable mold cavity 621 provided on the movable mold 620. When the fixed mold 610 and the movable mold 620 are closed, the fixed mold cavity 611 can be enclosed with the movable mold cavity 621 to form a complete mold cavity for injection molding. Based on this structural setting, the depth of the first mold cavity gradually increases to the depth of the Nth mold cavity, which should be understood as the depth of the fixed mold cavity 611 gradually increasing.

[0101] Taking the example of a thick-walled light guide part with six layers of injection molding, N is also taken as six, and m is 60°. Based on this, the specific injection molding process of the thick-walled light guide part is described in detail as follows:

[0102] In the initial state, no plastic is injected into any of the mold cavities. First, the fixed mold 610 and the movable mold 620 are molded together. Then, the plastic raw material is injected into the shallowest first mold cavity through the injection station 210, and the pressure is maintained and cooled to form the first thick-walled light guide layer 1 in the first mold cavity. Then, the fixed mold 610 and the movable mold 620 are separated, and the movable mold 620 is driven to rotate 60° along the first direction through the turntable assembly 400, so that the first thick-walled light guide layer 1 moves with the movable mold cavity 621 to the second group of molding stations, and then the fixed mold 610 and the movable mold 620 are molded together. After the mold is closed, the mold cavity where the first thick-walled light guide layer 1 is located constitutes the second mold cavity. Since the depth of the second mold cavity is deeper, An injection molding area is formed between the cavity wall of the second mold cavity and the first thick-walled light guide layer 1, and the shape of the injection molding area corresponds to the outer contour of the subsequent second thick-walled light guide layer 2, and the mold cavity at the first group of molding stations is still the first mold cavity; at this time, the first mold cavity and the second mold cavity are respectively filled with plastic raw materials through the injection station 210 and pressure-maintained and cooled to form the first thick-walled light guide layer 1 in the first mold cavity and the second thick-walled light guide layer 2 in the second mold cavity, wherein the second thick-walled light guide layer 2 in the second mold cavity covers the surface of the first thick-walled light guide layer 1 and is integrated; then the fixed mold 610 and the movable mold 620 are separated, and the movable mold is driven by the turntable assembly 400 The tool 620 is rotated 60 degrees along the first direction, so that the two layers of thick-walled light guide components of the second molding station are moved to the third molding station with the movable mold cavity 621, and the one layer of thick-walled light guide components of the first molding station is moved to the second molding station with the movable mold cavity 621, and then the fixed mold 610 and the movable mold 620 are closed; after closing the mold, the mold cavity where the two layers of thick-walled light guide components on the third molding station are located constitutes the third mold cavity. Since the depth of the third mold cavity is deeper, an injection molding area is formed between the cavity wall of the third mold cavity and the two layers of thick-walled light guide components. The shape of the injection molding area corresponds to the outer contour of the subsequent third layer of thick-walled light guide component layer 3; at this time, the first mold cavity and the second mold cavity are sent through the injection station 210. , the third mold cavity is respectively filled with plastic raw materials and pressure is maintained and cooled to form a first thick-walled light guide layer 1 in the first mold cavity, a second thick-walled light guide layer 2 in the second mold cavity, and a third thick-walled light guide layer 3 in the third mold cavity, wherein the third thick-walled light guide layer 3 in the third mold cavity covers the surfaces of the first two thick-walled light guide layers and is integrated with them, and the second thick-walled light guide layer 2 in the second mold cavity covers the surface of the first thick-walled light guide layer 1 and is integrated with them; then, the molds are continued to be separated and the movable mold 620 is driven by the turntable assembly 400 to rotate 60° in the first direction to repeat the above injection molding operation to sequentially form a fourth thick-walled light guide layer 4 and a fifth thick-walled light guide layer 5;After the turntable rotates five times, the first to sixth mold cavities are all filled with plastic raw materials. At this time, the sixth mold cavity is formed with the first thick-walled light guide layer 1, the second thick-walled light guide layer 2, the third thick-walled light guide layer 3, the fourth thick-walled light guide layer 4, the fifth thick-walled light guide layer 5 and the sixth thick-walled light guide layer 6. The six thick-walled light guide layers constitute a thick-walled light guide finished product. After the fixed mold 610 and the movable mold 620 are separated, the thick-walled light guide finished product can be taken out from the movable mold cavity 621 corresponding to the sixth group of molding stations, thus completing the layered injection molding process of a thick-walled light guide. After the thick-walled light guide finished product is taken out from the movable mold cavity 621 corresponding to the sixth group of molding stations, the movable mold cavity 621 becomes empty. At this time, the turntable assembly 400 is continued to be used. The movable mold 620 is driven to rotate 60° in the first direction, so that the empty movable mold cavity 621 returns to the first molding station, and at the same time, the five layers of thick-walled light guide components on the fifth molding station are moved to the sixth molding station. Then, the mold is closed and the above-mentioned injection molding operation is repeated, so that the sixth layer of thick-walled light guide components 6 in the sixth mold cavity covers the surface of the first five layers of thick-walled light guide components and is integrated. At this time, the layered injection molding process of another thick-walled light guide component is completed in the sixth mold cavity. The mold can be separated and the finished thick-walled light guide component can be taken out from the movable mold cavity 621 corresponding to the sixth molding station. The above-mentioned injection molding operation can be repeated subsequently. Each time the turntable assembly 400 rotates 60°, a finished thick-walled light guide component can be obtained. After each subsequent mold closing, it is only necessary to fill all the mold cavities with plastic raw materials. In this way, the rotation cycle characteristics of the turntable assembly 400 can be fully utilized to achieve layered injection molding and continuous production of thick-walled light guide components in a smaller space.

[0103] The operation of removing the finished thick-walled light guide component from the movable mold cavity 621 can be achieved with the aid of a ejection mechanism or a mechanical clamp, which is not limited here.

[0104] It should be noted that other contents of the thick-walled light guide component injection molding device and thick-walled light guide component injection molding method disclosed in this application can be referred to the prior art and will not be repeated here.

[0105] The above are only some embodiments of the present application and are not intended to limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A thick-walled light guide injection molding device, wherein: The thick-wall light guide component injection molding device comprises: Injection assembly, used to melt and inject plastic raw materials; A fixed mold, wherein the fixed mold is provided with at least two injection stations in a horizontal direction, and the injection assembly is used for injecting plastic raw materials into the at least two injection stations; A movable mold, wherein the movable mold is provided with a turntable assembly, on which a forming mold is mounted, and the turntable assembly is used to drive the forming mold to rotate a fixed angle each time to form N groups of forming stations; wherein N is a natural number greater than 1, and the cumulative rotation angle of the turntable assembly is 360°; The at least two injection stations are used to supply plastic raw materials to each group of the molding stations to respectively form each layer structure of the thick-walled light guide component. The thick-walled light guide component layer formed on the Nth group of molding stations covers the thick-walled light guide component layer formed on the N-1th group of molding stations and is integrated with each other. The Nth group of molding stations is used to form the Nth layer of thick-walled light guide components.

2. The thick-walled light guide component injection molding device according to claim 1, wherein: The N groups of molding stations are respectively provided with a first mold cavity to an Nth mold cavity, and the first mold cavity to the Nth mold cavity are respectively used to mold a layer structure of a thick-walled light guide component, and the at least two injection stations inject plastic raw materials into the first mold cavity to the Nth mold cavity through a hot runner of the molding mold.

3. The thick-walled light guide component injection molding device according to claim 2, wherein: The depth of the first mold cavity gradually increases to the depth of the Nth mold cavity.

4. The thick-walled light guide component injection molding device according to claim 1, wherein: The injection assembly includes a first injection mechanism and a second injection mechanism, and the injection station includes a first injection station and a second injection station; the first injection mechanism is used to inject plastic raw materials into the first injection station, and the second injection mechanism is used to inject plastic raw materials into the second injection station; The first injection station is connected to the first group of molding stations and the Nth group of molding stations, and the second injection station is connected to the second group of molding stations to the N-1th group of molding stations.

5. The thick-walled light guide component injection molding device according to claim 1, wherein: The forming stations of the first group to the Nth group are evenly distributed along the circumferential direction.

6. The thick-walled light guide component injection molding device according to claim 1, wherein: Each layer of the thick-walled light guide member rotates with the turntable assembly.

7. The thick-walled light guide component injection molding device according to claim 1, wherein: The turntable assembly includes a turntable body, a driving assembly and a positioning assembly; the molding die is mounted on the turntable body, the driving assembly is connected to the turntable body, and the driving assembly is used to drive the turntable body to rotate; the positioning assembly is used to abut against the turntable body when the turntable body rotates to a preset position to prevent the turntable body from rotating.

8. A method for injection molding a thick-walled light guide, wherein: The method is carried out by using the thick-walled light guide component injection molding device as claimed in any one of claims 1 to 7; The thick-wall light guide component injection molding method comprises the following steps: S1, injecting molten plastic material into the first group of molding stations through the injection assembly to form a first thick-walled light guide layer; S2, driving the forming mold to rotate m° along a first direction by the turntable assembly; S3, injecting molten plastic raw materials into the M+1 group of molding stations through the injection assembly to form the M+1th thick-walled light guide layer; wherein M is the current cumulative number of rotations of the turntable assembly; S4, repeat the above steps S2 to S3 until M+1=N.

9. The thick-walled light guide component injection molding method according to claim 8, wherein: The N groups of molding stations are respectively provided with a first mold cavity to an Nth mold cavity, the first mold cavity to the Nth mold cavity are respectively used to mold a layer structure of a thick-walled light guide, the at least two injection stations inject plastic raw materials into the first mold cavity to the Nth mold cavity through a hot runner of a molding mold; the depth of the first mold cavity to the Nth mold cavity gradually increases; each layer of the thick-walled light guide rotates with the turntable assembly; In step S1, injecting molten plastic material into the first group of molding stations through the injection assembly includes: S11, injecting molten plastic material into the first mold cavity through the injection assembly; In step S3, injecting molten plastic raw materials into the M+1th group of molding stations through the injection assembly includes: S31, injecting molten plastic material into the first mold cavity through the injection assembly, and injecting molten plastic material into the mold cavity from the second mold cavity to the Nth mold cavity where the thick-walled light guide layer exists.

10. The thick-walled light guide component injection molding method according to claim 9, wherein: The first mold cavity to the Nth mold cavity are evenly distributed along the circumferential direction; In step S4, the above steps S2 to S3 are repeatedly performed until M+1=N, including: S5, taking out the finished thick-walled light guide component in the Nth mold cavity; S6, driving the molding die to rotate m° along a first direction by the turntable assembly, and then injecting molten plastic material into the first mold cavity to the Nth mold cavity by the injection assembly; S7, repeat the above steps S5 to S6.

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