Light guide body after-installation-free double-color injection mold

Abstract

The utility model discloses a light guide body after-installation-free double-color injection mold which comprises a first-color mold and a second-color mold, the first-color mold comprises a first-color lower fixing plate, a first-color lower mold plate, a first-color upper mold plate, a first-color upper fixing plate and a first-color mold core; the second-color mold comprises a second-color lower fixing plate, a second-color lower mold plate, a second-color upper mold plate, a second-color upper fixing plate and a second-color mold core, a first forming insert is arranged on the first-color mold core, forming rods are detachably arranged in the first forming insert, and the three forming rods are arranged side by side and penetrate through the first forming insert; the first forming insert is located below the first color mold core, and a through hole allowing the forming rod to penetrate through is formed in the first color mold core. According to the utility model, the light guide body and the key body are integrally molded in a double-color manner, so that the problem that dust-proof and waterproof functions cannot be realized due to a gap generated by post-installation of the light guide body can be avoided, the product quality is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to a double-color injection mold for a light guide body without post-installation. Background Art

[0002] As an important carrier of human-computer interaction in the car, with the development of the automobile industry, people's pursuit of advanced, technological and lightweight design of automobiles, the application ratio of two-color injection molding technology is getting higher and higher. Among them, automobile switches often integrate light, sound, electricity and other functions, that is, the product needs to realize the functions of character backlight and indication, and there should be no light leakage or light leakage between different characters; it is necessary to realize effective and stable electrical performance triggering function, and at the same time, it is necessary to take into account the surface treatment process of the product to ensure beautiful appearance. This button is an exposed part and the surface is required to be matte or high-gloss spray paint process, and no appearance defects such as weld lines, shrinkage, color mixing, extrusion deformation, double eyelids, etc. are allowed.

[0003] In the existing process scheme, the light guide and the button body are injection molded in single-color molds in batches, and the light guide is assembled in the post-process. There is a gap, which makes it impossible to be dustproof and waterproof. In addition, the post-process assembly of the light guide has unstable quality and low pass rate due to assembly errors and unreasonable factors. In addition, the additional process lengthens the cycle and increases the manufacturing cost. Summary of the invention

[0004] The utility model overcomes the shortcomings of the prior art and provides a two-color injection mold for a light guide body without post-installation. By using the two-color integral molding of the light guide body and the key body, the gap caused by the post-installation of the light guide body and the inability to achieve functions such as dustproof and waterproof can be avoided, thereby improving product quality and production efficiency.

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

[0006] A light guide body post-installation-free two-color injection mold comprises a first-color mold and a second-color mold, the first-color mold comprises a first-color lower fixing plate, a first-color lower template, a first-color upper template, a first-color upper fixing plate and a first-color mold core, the second-color mold comprises a second-color lower fixing plate, a second-color lower template, a second-color upper template, a second-color upper fixing plate and a second-color mold core, a first molding insert is arranged on the first-color mold core, a molding rod is detachably arranged in the first molding insert, three molding rods are arranged side by side and penetrated in the first molding insert, the first molding insert is located below the first-color mold core, and a through hole for the molding rod to pass through is arranged on the first-color mold core.

[0007] Preferably, the first molding insert is provided with three openings, and the openings are arranged in a T shape.

[0008] Preferably, the opening includes a transverse hole and a vertical hole, the transverse hole and the vertical hole are arranged in communication, and the forming rod is adapted to the opening.

[0009] Preferably, a second molding insert is provided on the second color mold core, a gate runner is provided on the second color mold core, an inlet gate is provided on the gate runner, the inlet gate is located at the side of the second molding insert, and a socket for the second molding insert to pass through is provided on the second color mold core.

[0010] Preferably, the first color mold and the second color mold are each provided with two groups of gate runners, wherein each group of gate runners of the first color mold corresponds to three inlet gates, and each group of gate runners of the second color mold corresponds to one inlet gate.

[0011] Preferably, the first color mold and the second color mold both include mold feet, the mold feet of the first color mold are located between the first color lower fixing plate and the first color lower mold plate, and the mold feet of the second color mold are located between the second color lower fixing plate and the second color lower mold plate.

[0012] Beneficial effects of the utility model:

[0013] The utility model can avoid the gap caused by the post-installation of the light guide and the key body by adopting two-color integrated molding to avoid the problem of low parts qualification rate (uneven gap and surface difference, etc.) due to assembly errors and unstable factors in the post-installation of the light guide. In addition, the light guide and the key body are formed into a two-color integrated molding to avoid multiple injection molding (the key body and the light guide body are single-color molded for multiple injection molding) and can also save the post-assembly process, which can shorten the project cycle and save manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the first color mold core according to a specific embodiment of the utility model;

[0016] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0017] Figure 4 It is a structural schematic diagram of the second color mold core according to a specific embodiment of the utility model;

[0018] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0019] Figure 6 It is a structural schematic diagram of the second color mold core according to a specific embodiment of the utility model;

[0020] Figure 7 It is a structural schematic diagram reflecting the first molding insert in a specific embodiment of the utility model;

[0021] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0022] Fig. 9 It is a structural schematic diagram reflecting the formation of the light guide body in a specific embodiment of the utility model;

[0023] Fig.10 This is a structural schematic diagram of the key body molding of a specific embodiment of the utility model;

[0024] Fig.11 It is a structural diagram of existing buttons;

[0025] Fig.12 It is a structural schematic diagram reflecting the key body and the light guide body of a specific embodiment of the utility model.

[0026] In the figure: a, light guide; b, button body; 1, first color mold; 11, first color lower fixing plate; 12, first color lower template; 13, first color upper template; 14, first color upper fixing plate; 15, first color mold core; 16, perforation; 2, second color mold; 21, second color lower fixing plate; 22, second color lower template; 23, second color upper template; 24, second color upper fixing plate; 25, second color mold core; 26, socket; 3, first molding insert; 31, molding rod; 32, opening; 33, horizontal hole; 34, vertical hole; 4, gate runner; 41, inlet gate; 5, mold foot. DETAILED DESCRIPTION

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

[0028] like Figure 1-12As shown, a light guide free post-installation two-color injection mold comprises a first color mold 1 and a second color mold 2, the first color mold 1 comprises a first color lower fixing plate 11, a first color lower template 12, a first color upper template 13, a first color upper fixing plate 14 and a first color mold core 15, the second color mold 2 comprises a second color lower fixing plate 21, a second color lower template 22, a second color upper template 23, a second color upper fixing plate 24 and a second color mold core 25, the first color mold core 15 is provided with a first molding insert 3, the first molding insert 3 is detachably provided with a molding rod 31, three molding rods 31 are arranged side by side and penetrated in the first molding insert 3, the first molding insert 3 is located below the first color mold core 15, and the first color mold core 15 is provided with a through hole 16 for the molding rod 31 to pass through.

[0029] By adopting the above technical solution, in the present invention, since the indication symbol of the key switch to be formed has three gears, three light guides a are designed to indicate the partitions. Fig.11 and Fig.12 , and the surface heights and curvatures of the three light guides a are inconsistent. According to the traditional manufacturing process, the three light guides a are generally designed as a connected structure and then installed later. In this way, there will be an assembly gap, and the quality is unstable and the qualified rate is low due to the assembly error. However, through the two-color mold design of the utility model, the light guide a and the key body b are formed in two colors in one, which can avoid the gap caused by the post-installation of the light guide a and the inability to achieve dustproof and waterproof functions. In addition, by setting the first molding insert 3 and the detachable molding rod 31, the contour clarity of the molding surface of the light guide a is guaranteed, and the overflow and coating phenomenon in the two-color key molding that affects the function of the parts is avoided. At the same time, the design of the disassembly process helps to exhaust the molding surface of the light guide a, ensure the appearance quality, and ensure the surface quality of the parts to avoid affecting the light transmission effect.

[0030] As an improved specific implementation, three openings 32 are provided on the first molding insert 3, and the openings 32 are arranged in a T shape; the openings 32 include transverse holes 33 and vertical holes 34, the transverse holes 33 and the vertical holes 34 are arranged in communication, and the molding rod 31 is adapted to the openings 32.

[0031] By adopting the above technical solution, the forming rod 31 is adapted to the opening 32, and a vertical hole 34 connected to the transverse hole 33 is provided. The bottom end of the forming rod 31 is also configured as a T-shaped forming portion, and the insertion portion of the forming rod 31 is configured to be adapted to the transverse hole 33, so that good guiding and forming effects can be achieved for the forming rod 31.

[0032] As an improved specific implementation method, a second molding insert is provided on the second color mold core 25, a gate runner 4 is provided on the second color mold core 25, an inlet gate 41 is provided on the gate runner 4, the inlet gate 41 is located on the side of the second molding insert, and a socket 26 for the second molding insert to pass through is provided on the second color mold core 25; the gate runners 4 of the first color mold 1 and the second color mold 2 are each provided with two groups, wherein each group of gate runners 4 of the first color mold 1 corresponds to three inlet gates 41, and each group of gate runners 4 of the second color mold 2 corresponds to one inlet gate 41.

[0033] By adopting the above technical solution, the second molding insert (not shown in the figure) is adapted to the shape of the first molding insert 3, except that the second molding insert does not have a detachable molding rod 31. Among them, the light guide a molded by the first color mold 1 is made of PC material, and the point gate is used for glue injection, which can fully guarantee the molding quality and saturation of each split light guide a, and avoid the problem of extrusion deformation of the light guide a and unclear contour caused by re-melting during two-color molding. The key body b molded by the second color mold 2 adopts the form of side point gate injection. The setting of the gate position can fully guarantee the quality of the appearance weld line, and the two-color key body b uses PC material with a molding temperature slightly lower than that of the first color by 20-30 degrees, so as to avoid re-melting during two-color molding and affect the appearance quality.

[0034] As an improved specific implementation manner, the first color mold 1 and the second color mold 2 both also include a mold foot 5, the mold foot 5 of the first color mold 1 is located between the first color lower fixed plate 11 and the first color lower template 12, and the mold foot 5 of the second color mold 2 is located between the second color lower fixed plate 21 and the second color lower template 22.

[0035] By adopting the above technical solution and arranging in this way, by arranging the mold foot 5, the supporting strength of the first color mold 1 and the second color mold 2 can be ensured.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A light guide body post-installation-free two-color injection mold, comprising a first color mold (1) and a second color mold (2), the first color mold (1) comprising a first color lower fixing plate (11), a first color lower mold plate (12), a first color upper mold plate (13), a first color upper fixing plate (14) and a first color mold core (15), the second color mold (2) comprising a second color lower fixing plate (21), a second color lower mold plate (22), a second color upper mold plate (23), a second color upper fixing plate (24) and a second color mold core (25), characterized in that: A first molding insert (3) is arranged on the first color mold core (15), a molding rod (31) is detachably arranged in the first molding insert (3), three molding rods (31) are arranged side by side and pass through the first molding insert (3), the first molding insert (3) is located below the first color mold core (15), and a through hole (16) is arranged on the first color mold core (15) for the molding rod (31) to pass through.

2. The light guide body post-installation-free two-color injection mold according to claim 1, characterized in that: The first molding insert (3) is provided with three openings (32), and the openings (32) are arranged in a T shape.

3. The light guide body post-installation-free two-color injection mold according to claim 2, characterized in that: The opening (32) includes a transverse hole (33) and a vertical hole (34), the transverse hole (33) and the vertical hole (34) are arranged in communication, and the forming rod (31) is adapted to the opening (32).

4. A light guide body post-installation-free two-color injection mold according to claim 1, 2 or 3, characterized in that: The second color mold core (25) is provided with a second molding insert, the second color mold core (25) is provided with a gate runner (4), the gate runner (4) is provided with an inlet gate (41), the inlet gate (41) is located at the side of the second molding insert, and the second color mold core (25) is provided with a socket (26) for the second molding insert to pass through.

5. The light guide body post-installation-free two-color injection mold according to claim 4, characterized in that: The first color mold (1) and the second color mold (2) are both provided with two groups of gate runners (4), wherein each group of gate runners (4) of the first color mold (1) corresponds to three inlet gates (41), and each group of gate runners (4) of the second color mold (2) corresponds to one inlet gate (41).

6. The light guide body post-installation-free two-color injection mold according to claim 5, characterized in that: The first color mold (1) and the second color mold (2) both further include mold feet (5); the mold feet (5) of the first color mold (1) are located between the first color lower fixed plate (11) and the first color lower mold plate (12); and the mold feet (5) of the second color mold (2) are located between the second color lower fixed plate (21) and the second color lower mold plate (22).

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