Two-color knob mold

Abstract

The utility model aims at providing a cost low double -colored knob mould which can satisfy the light transmission function and appearance surface is not damaged, the utility model discloses a one -colour front mould, two -colour front mould and two groups of back moulds are provided with a plurality of groups of first cavity assembly on the back mould, and the first cavity assembly includes at least two forming blocks that slide fit on the back mould, and all forming blocks cooperate to form inner forming groove and outer forming groove, and two pairs of closing mould surfaces of all forming blocks are provided with first injection channel and second injection channel respectively, the first injection channel communicates with the inner forming groove, the second injection channel communicates with the outer forming groove, and the back mould still is provided with two -colour glue inlet runner that communicates with the second injection channel, and the two -colour glue inlet runner cooperates with two -colour glue inlet of two -colour front mould, and corresponding a plurality of groups of second cavity assembly that cooperate with a plurality of groups of first cavity assembly are provided on the two -colour front mould, and the second cavity assembly includes at least two elastic blocks. The utility model is applied to the technical field of injection mould.

Description

Technical Field

[0001] This utility model applies to the technical field of injection molds, and particularly relates to a two-color knob mold. Background Technology

[0002] Keyboards, as an important tool for computer interaction, are perfectly capable of handling regular character input. However, with technological advancements, users have higher demands for keyboard functionality. Previously, volume adjustment typically required clicking the corresponding icon in the taskbar and dragging the corresponding pointer in a pop-up window, a cumbersome method. To accommodate special functions, keyboards developed key combinations for these adjustments. However, this method still lacked intuitiveness, leading to the addition of knobs to keyboards for more convenient adjustment. Conventional adjustment knobs are usually manufactured using monochrome injection molding. However, with the diversification of user needs for keyboard devices, such as RGB lighting, traditional monochrome injection-molded knobs, when made of opaque material, suffer from poor light transmission due to the internal frame obstructing the light. Conversely, using transparent material would reveal the internal frame unsightly. Therefore, a knob structure compatible with RGB lighting is needed.

[0003] In addition, such as Figure 1 As shown, the traditional solution for the knob structure in injection molds is to use an upper mold to provide a smooth surface, and to cooperate with multiple sliders on the lower mold to form the injection cavity. At the same time, in order to ensure that the sprue is not located on the appearance surface, a bottom-mounted gate is also required. In order to ensure that the injection molded product can be smoothly removed after injection, the stroke of the slider needs to avoid the sprue, which results in a long distance. This places high demands on the movement accuracy of the slider. If the accuracy is insufficient, the position where the sliders close together is prone to clamping lines during injection, affecting the appearance.

[0004] Therefore, a low-cost two-color knob mold that can satisfy the light transmission function and maintain the appearance surface is needed to solve the above technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a low-cost two-color knob mold that can meet the requirements of light transmission and has no damage to the appearance.

[0006] The technical solution adopted by this utility model is as follows: This utility model includes a single-color front mold, a two-color front mold, and two sets of rear molds. The rear molds are provided with several sets of first cavity assemblies. Each first cavity assembly includes at least two molding blocks that slide on the rear molds. All the molding blocks cooperate to form an inner molding groove and an outer molding groove. Two pairs of mating surfaces of each molding block are respectively provided with a first injection channel and a second injection channel. The first injection channel communicates with the inner molding groove, and the second injection channel communicates with the outer molding groove. The rear molds are also provided with a two-color injection channel that communicates with the second injection channel. The two-color injection channel cooperates with the two-color injection port of the two-color front mold. The two-color front molds are correspondingly provided with several sets of second cavity assemblies that cooperate with the several sets of first cavity assemblies. Each second cavity assembly includes at least two spring blocks that slide on the two-color front molds. The ends of all the spring blocks cooperate to form an upper molding groove.

[0007] As can be seen from the above scheme, the skeleton and shell are formed in two steps through two-color injection molding, resulting in different light transmittances for the two. After assembly, the skeleton guides the light, while the shell allows for secondary light transmission, achieving uniform light effect. The first cavity assembly simultaneously forms the inner and outer molding grooves, which, in conjunction with the single-color front mold, form the skeleton's molding cavity first. Then, the skeleton, outer molding groove, and two-color front mold, together with the single-color injection molded skeleton and the two-color front mold, form the shell through two-color injection molding. Furthermore, by utilizing a spring block located in the front mold and the injection runner located in the rear mold, the injection runner is separated from the second cavity assembly. During demolding, the spring block does not need to avoid obstacles; through separation and lifting with the front mold, the injection-molded product is naturally exposed. The separation structure of the first cavity assembly then facilitates the demolding of the sprue and the product. This reduces precision requirements through short-distance displacement, ensuring the shell's appearance and reducing mold manufacturing difficulty and cost.

[0008] A preferred embodiment is that the ends of all the spring blocks in each group of the second cavity assembly are provided with connecting grooves, and the connecting grooves of all the spring blocks cooperate to form the upper molding groove. The connecting grooves of all the spring blocks in each group of the second cavity assembly are ground and formed in one go in the mold-closed state.

[0009] A preferred embodiment is that the single-color front mold is provided with a plurality of single-color injection ports corresponding to the first injection channels of each group of the first cavity assembly.

[0010] A preferred embodiment is that the rear mold is provided with a first reset elastic element that drives the molding block to move in the mold closing direction.

[0011] In a preferred embodiment, the molding block is provided with a limiting block that cooperates with the rear mold, and the single-color front mold and the spring block are respectively provided with a first clearance groove and a second clearance groove that cooperate with the limiting block.

[0012] A preferred embodiment is that at least one connecting groove is provided between the inner forming groove and the outer forming groove.

[0013] A preferred embodiment is that the two-color front mold is provided with a second reset elastic element that drives the spring block to move in the mold parting direction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a traditional rear mold slider;

[0015] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 3 yes Figure 2 Enlarged view of section A;

[0017] Figure 4 yes Figure 2 Enlarged view of section B;

[0018] Figure 5 yes Figure 2 Enlarged view of section C;

[0019] Figure 6 This is a schematic diagram of the structure of the second cavity component and its cooperation with the product in this utility model. Detailed Implementation

[0020] like Figures 2 to 6As shown, in this embodiment, the present invention includes a single-color front mold 1, a two-color front mold 2, and two sets of rear molds 3. The rear mold 3 is provided with several sets of first cavity assemblies 4. Each first cavity assembly 4 includes at least two molding blocks 41 that slide on the rear mold 3. A first guide strip is correspondingly provided on the rear mold 3. The molding blocks 41 slide on the first guide strip. All the molding blocks 41 cooperate to form an inner molding groove 42 and an outer molding groove 43. Two pairs of mating surfaces of all the molding blocks 41 are respectively provided with a first injection channel and a second injection channel 44. The first injection channel communicates with the inner molding groove 42, and the second injection channel communicates with the inner molding groove 43. The injection channel 44 is connected to the outer molding groove 43. The rear mold 3 is also provided with a two-color injection channel 45 that is connected to all the second injection channels 44. The two-color injection channel 45 cooperates with the two-color injection port 21 of the two-color front mold 2. The two-color front mold 2 is provided with several sets of second cavity assemblies 5 that cooperate with several sets of first cavity assemblies 4. The second cavity assembly 5 includes at least two spring blocks 51 that are slidably fitted on the two-color front mold 2. The two-color front mold 2 is provided with a second guide strip. The spring blocks 51 are slidably fitted with the second guide strip. The ends of all the spring blocks 51 cooperate to form an upper molding groove 52. The single-color front mold 1 and the two-color front mold 2 cooperate with the rear mold 3 in sequence, thereby realizing two-color injection molding on the basis of the single-color injection molded product. Compared with the single-color molding of the transmission, the two-color injection molding can separate the injection molding of special-shaped parts, reduce the complexity of the mold and reduce the manufacturing cost of the mold. While the first cavity assembly 4 forms the inner molding groove 42 and the outer molding groove 43, submerged sprue gates are formed on the two mold closing surfaces, balancing demolding and molding effects. Simultaneously, the sprue gates are separated from the second cavity assembly 5. Compared to the traditional rear mold slider structure, which requires a 20mm horizontal displacement to avoid the sprue gate, the displacement of the spring block 51 is only 2-3mm, and the movement direction is obliquely upward, significantly reducing demolding difficulty, mold manufacturing difficulty, and cost. Furthermore, the dual rear mold design allows for simultaneous operation of the single-color front mold 1 and the two-color front mold 2 during each mold closing, improving production efficiency. The two sets of rear molds 3 are arranged side-by-side on the rotating mechanism, and their installation directions are rotated 180 degrees. The single-color front mold 1 and the two-color front mold 2 are arranged side-by-side and connected to a vertical drive mechanism located above the rotating mechanism. The single-color front mold 1 is provided with a single-color molding groove 13 that mates with the inner molding groove 42.

[0021] like Figure 2 and Figure 5 As shown, in this embodiment, the first cavity assembly 4 includes three molding blocks 41, and the second cavity assembly 5 includes three spring blocks 51. The three molding blocks 41 and the three spring blocks 51 are arranged in a circumferential array.

[0022] like Figure 4 and Figure 6 As shown, in this embodiment, each end of all the spring blocks 51 in each group of the second cavity assembly 5 is provided with a connecting groove 53. The connecting grooves 53 of all the spring blocks 51 in this group of the second cavity assembly 5 cooperate to form the upper molding groove 52. The connecting grooves 53 of all the spring blocks 51 in each group of the second cavity assembly 5 are ground and formed in one go in the mold-closed state. By grinding and forming the connecting grooves 53 in one go in the mold-closed state, the clamping line of the upper molding groove 52 formed after all the connecting grooves 53 are engaged is tighter, achieving a near-seamless appearance effect.

[0023] like Figure 3 As shown, in this embodiment, the single-color front mold 1 is provided with a plurality of single-color injection ports 11 corresponding to the first injection channels of each group of first cavity components 4. The rear mold 3 is provided with a single-color injection runner groove 48 corresponding to each of the first injection channels. After the single-color front mold 1 and the rear mold 3 are closed, the lower end face of the single-color front mold 1 closes the single-color injection runner groove 48 to form a channel. The single-color injection port 11 outputs glue to the single-color injection runner groove 48, and then injects it into the inner molding groove 42 through the single-color injection channel 48 to form a single-color product. The semi-closed runner allows the sprue to be exposed after mold separation, facilitating subsequent demolding. The two-color injection runner 45 is the same as the single-color injection runner groove 48, both being grooves opened on the rear mold 3 and forming a channel when the mold is closed.

[0024] like Figure 4 and Figure 5 As shown, in this embodiment, the rear mold 3 is provided with a first reset elastic element that drives the molding block 41 to move in the mold closing direction. The first reset elastic element keeps the molding blocks 41 close to each other, thereby ensuring the stability of the molding cavity. When demolding, the molding blocks 41 separate to expose the sprue and the product by overcoming the elastic force of the first reset elastic element. The first reset elastic element is a spring disposed within the rear mold 3. The molding block 41 is provided with a limiting block 46 that cooperates with the rear mold 3. The single-color front mold 1 and the spring block 51 are respectively provided with a first clearance groove 12 and a second clearance groove 54 that cooperate with the limiting block 46. The limiting block 46 is used to limit the stroke of the molding block 41 and, during demolding, is pressed by an external material handling device to transmit a pushing force to the first reset elastic element and overcome the elastic force to achieve separation.

[0025] like Figure 5 As shown, in this embodiment, at least one connecting groove 47 is provided between the inner molding groove 42 and the outer molding groove 43. The connecting groove 47 increases the connection point between single-color injection molding and two-color injection molding, thereby improving the structural strength of the product.

[0026] In this embodiment, the two-color front mold 2 is provided with a second reset elastic element that drives the spring block 51 to move in the mold parting direction. The second reset elastic element drives the spring block 51 to move in the direction of separation, thereby achieving automatic demolding during mold parting without the need for external mechanical structure intervention. The second reset elastic element is a spring provided in the two-color front mold 2.

[0027] The working principle of this utility model:

[0028] When injection molding is started, the single-color front mold 1 and the rear mold 3 directly below it close together. Through several single-color injection ports 11, injection molding is performed in the single-color injection cavity formed by the cooperation of each set of inner molding grooves 42, connecting grooves 47 and single-color molding grooves 13 to form a single-color product knob skeleton. After cooling, the single-color front mold 1 separates from the current rear mold 3, and the rotating mechanism drives the current rear mold 3 to move to below the two-color front mold 2.

[0029] The two-color front mold 2 and the rear mold 3 are closed. During the mold closing process, the template of the two-color front mold 2 drives the spring block 51 to overcome the elastic force of the second reset elastic element, thereby forming an upper molding groove 52 in each group of second cavity components 5. The upper molding groove 52, the single-color product, and the outer molding groove 43 cooperate to form a two-color injection cavity. Glue is injected through the two-color inlet 21, and after passing through the two-color inlet flow channel 45, it is simultaneously injected into all the second injection channels 44, thereby forming the knob shell of the two-color product.

[0030] After injection molding is completed, the two-color front mold 2 rises to separate the mold. The spring blocks 51 separate from each other and move upward under the elastic force of the second reset elastic element, so as to detach from the product. The limiting block 46 drives the molding block 41 to overcome the elastic force of the first reset elastic element and move downward while separating, and exposes the sprue on the mold closing surface. The material taking mechanism takes out the knob product.

[0031] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A two-color knob mold, comprising a single-color front mold (1), a two-color front mold (2), and two sets of rear molds (3), characterized in that: The rear mold (3) is provided with a plurality of first cavity assemblies (4). Each first cavity assembly (4) includes at least two molding blocks (41) that slide on the rear mold (3). All the molding blocks (41) cooperate to form an inner molding groove (42) and an outer molding groove (43). A first injection channel and a second injection channel (44) are respectively provided on two pairs of mating surfaces of all the molding blocks (41). The first injection channel communicates with the inner molding groove (42), and the second injection channel (44) communicates with the outer molding groove (43). The rear mold (3) is also provided with a two-color injection channel (45) that communicates with the second injection channel (44). The two-color injection channel (45) cooperates with the two-color injection port (21) of the two-color front mold (2). The two-color front mold (2) is provided with a number of second cavity assemblies (5) that cooperate with a number of first cavity assemblies (4). The second cavity assembly (5) includes at least two spring blocks (51) that slide on the two-color front mold (2). The ends of all the spring blocks (51) cooperate to form an upper molding groove (52).

2. The two-color knob mold according to claim 1, characterized in that: Each set of the second cavity assembly (5) has a connecting groove (53) at the end of all the spring blocks (51), and the connecting grooves (53) of all the spring blocks (51) cooperate to form the upper molding groove (52). The connecting grooves (53) of all the spring blocks (51) of each set of the second cavity assembly (5) are ground and formed in one go in the mold closing state.

3. The two-color knob mold according to claim 1, characterized in that: The single-color front mold (1) is provided with a number of single-color injection ports (11) that cooperate with the first injection channel of each group of the first cavity assembly (4).

4. The two-color knob mold according to claim 1, characterized in that: The rear mold (3) is provided with a first reset elastic element that drives the molding block (41) to move in the mold closing direction.

5. The two-color knob mold according to claim 4, characterized in that: The molding block (41) is provided with a limiting block (46) that cooperates with the rear mold (3), and the single-color front mold (1) and the spring block (51) are respectively provided with a first clearance groove (12) and a second clearance groove (54) that cooperate with the limiting block (46).

6. The two-color knob mold according to claim 1, characterized in that: At least one connecting groove (47) is provided between the inner forming groove (42) and the outer forming groove (43).

7. The two-color knob mold according to claim 1, characterized in that: The two-color front mold (2) is provided with a second reset elastic element that drives the elastic block (51) to move in the mold parting direction.

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