Double-color injection mold

Abstract

The utility model discloses a double-color injection mold. The double-color injection mold comprises a first lower mold, a second lower mold, a rotating disc, a first upper mold, a second upper mold, an upper mold disc and a casting die assembly, the first lower die and the second lower die are fixed on the rotating disc, and the first upper die and the second upper die are fixed on the upper die disc; the casting die assembly comprises a base plate, a rotating motor and a rotating pressing plate. The base plate is detachably and fixedly connected to the rotating disc and located on one side of the first lower die and / or the second lower die, the rotating motor is arranged on the base plate, and one side of the rotating pressing plate is fixedly connected with an output shaft of the rotating motor. The utility model provides a casting die assembly for a double-color injection mold, which can limit the movement of a product through a pressing plate in the process of rotating the mold to realize double-color switching, can ensure that the product does not deviate while rotating at a high speed, and is favorable for improving the processing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a double-color injection molding mold. Background Art

[0002] With the development of society and the improvement of consumption levels, consumers have higher and higher requirements for the aesthetics of products. In the field of injection molding, two-color injection molding can produce products with different colors and texture effects in one injection molding cycle, thereby improving the appearance and design appeal of the product. It has been increasingly widely used in the fields of automotive parts, electronic product casings, and household appliances.

[0003] The typical two-color injection molding process generally achieves the switching of two colors by rotating the mold, that is, the first material is first injected into the mold, the upper and lower molds are separated after the molding, and then the lower mold is rotated to cooperate with the other upper mold to inject the second material to achieve two-color injection molding. In some products, the color separation position may be on one side or one side is heavier. When the mold is rotated, it is easy to cause the formed product to be partially offset or thrown out due to centrifugal effect. To solve this problem, the rotation speed can be reduced, but reducing the rotation speed will lead to reduced processing efficiency. The mold can also be improved and designed specifically, but the improvement and remanufacturing of the mold requires high costs. Utility Model Content

[0004] The utility model aims to provide a two-color injection mold to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a two-color injection mold, including a first lower mold, a second lower mold, a rotating disk, a first upper mold, a second upper mold, an upper mold disk, and a pressure piece assembly; the first lower mold and the second lower mold are fixed on the rotating disk, and the first upper mold and the second upper mold are fixed to the upper mold disk; the pressure piece assembly includes a base plate, a rotating motor, and a rotating pressure plate; the base plate can be detachably fixedly connected to the rotating disk, located on one side of the first lower mold and / or the second lower mold, the rotating motor is arranged on the base plate, and one side of the rotating pressure plate is fixedly connected to the output shaft of the rotating motor.

[0006] Furthermore, the pressure piece assembly also includes a lower base plate and a lower pressure limiting structure. The lower part of the base plate is connected to the upper part of the lower base plate through a plurality of elastic parts. A plurality of limiting rods are arranged on the lower base plate. The upper part of the limiting rods passes through the through holes on the base plate. The lower base plate can be removably fixedly connected to the rotating disk.

[0007] Furthermore, the downward pressure limiting structure includes a limiting ring, which is fixed to the lower base plate by a fixed L-shaped plate, and its axis coincides with the axis of the rotating shaft of the rotating motor. A plurality of rolling members are arranged on the rotating pressure plate below the limiting ring, and the rolling members cooperate with the limiting ring. A plurality of cut-out portions are arranged below the limiting ring, and the number of the cut-out portions corresponds to the number of the rolling members.

[0008] Furthermore, the rotating pressure plate includes a fixed plate and a movable plate, and the movable plate is detachably fixed in front of the fixed plate.

[0009] Furthermore, the pressing piece assembly also includes a plurality of pads, and the pads are arranged below the lower substrate.

[0010] Furthermore, the pad is arranged on a side opposite to the pressing piece assembly.

[0011] The utility model provides a pressing piece assembly for a two-color injection mold, which can limit the movement of the product through a pressing plate during the two-color switching of the rotating mold, and can ensure that the product will not deviate while rotating at a high speed, which is beneficial to improving processing efficiency. It is particularly suitable for the field of transforming a small single-color injection mold into a two-color mold, and can reduce the cost of mold redesign and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall solution of the utility model.

[0013] Figure 2 It is a schematic cross-sectional view of the lower die area of ​​the utility model.

[0014] Figure 3 It is a schematic diagram of a pressing component assembly of the utility model.

[0015] Figure 4 It is a partially enlarged schematic diagram of the pressing component assembly of the utility model. DETAILED DESCRIPTION

[0016] 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.

[0017] As attached Figure 1As shown, a two-color injection mold involved in the utility model includes a first lower mold 1, a second lower mold 2, a rotating plate 3, a first upper mold 4, a second upper mold 5, an upper mold plate 6, and a pressing component assembly 7. The first lower mold 1 and the second lower mold 2 are fixed on the rotating plate 3, and the first upper mold 4 and the second upper mold 5 are fixed to the upper mold plate 6.

[0018] When in use, the rotating disk 3 is installed on the driving unit of the two-color injection molding machine, and the driving unit can drive the rotating disk 3 to rotate. The upper mold plate 6 is fixedly installed on the movable mold unit of the two-color injection molding machine and connected to the feeding device. The movable mold unit can drive the upper mold plate 6 to reciprocate relative to the rotating disk 3.

[0019] The specific structures of the two-color injection molding machine, the first lower mold 1, the second lower mold 2, the first upper mold 4, and the second upper mold 5 are conventional designs in the field.

[0020] Furthermore, the first lower mold 1 and the second lower mold 2 have the same structure. The present application provides a lower mold structure, including a bottom plate 11, a push plate 12, a cover plate 13, a plurality of floating ejectors 14, ejector pins 15, a rear mold base 16, and a rear mold core 17.

[0021] The floating ejector 14 includes an ejector rod 141 and a spring 142; the bottom of the ejector rod 141 is arranged on the push plate 12, and is inserted into the blind hole on the rear mold base 16 through the through hole on the cover plate 13; the spring 142 is sleeved on the outer side of the ejector rod 141 on the upper part of the cover plate 13, and the inner diameter of the blind hole on the rear mold base 16 is smaller than the outer diameter of the spring 142. The floating ejector 14 is arranged to realize the floating of the rear mold base 16, which is beneficial to act as a buffer when the first upper mold 4, the second upper mold 5 and the first lower mold 1, the second lower mold 2 are closed at a higher speed, and the closing speed can be increased.

[0022] In the accompanying drawings, there are four floating top members 14 , which are evenly arranged at the four corners of the rear mold base 16 .

[0023] As attached Figure 3 , 4 As shown, the pressing piece assembly 7 includes a base plate 71 , a rotating motor 72 , and a rotating pressing plate 73 .

[0024] The base plate 71 is detachably fixedly connected to the rotating disk 3 and is located on one side of the first lower mold 1 and / or the second lower mold 2. The rotating motor 72 is arranged on the base plate 71, and one side of the rotating pressing plate 73 is fixedly connected to the output shaft of the rotating motor 72 and can rotate under the drive of the rotating motor 72. When the first lower mold 1 and / or the second lower mold 2 are separated from the first upper mold 4 and / or the second upper mold 5, the rotating motor 72 rotates the rotating pressing plate 73 to place it on the upper part of the product on the first lower mold 1 and / or the second lower mold 2 to limit the movement of the product.

[0025] Furthermore, the pressing member assembly 7 further includes a lower base plate 70 and a lower pressing limiting structure 74, the lower portion of the base plate 71 is connected to the upper portion of the lower base plate 70 via a plurality of elastic members 711, a plurality of limiting rods 701 are provided on the lower base plate 70, and the upper portions of the limiting rods 701 pass through through holes on the base plate 71. The elastic member 711 may be a spring.

[0026] The lower base plate 70 is detachably fixedly connected to the rotating disk 3 .

[0027] The downward pressure limiting structure 74 includes a limiting ring 741, which is fixed to the lower base plate 70 through a fixed L-shaped plate 742, and its axis coincides with the axis of the rotating shaft of the rotating motor 72. A plurality of rolling elements 730 are arranged on the rotating pressing plate 73 below the limiting ring 741, and the rolling elements 730 cooperate with the limiting ring 741. A plurality of cutouts 743 are arranged below the limiting ring 741, and the projection of the cutouts 743 on the axial plane of the limiting ring 741 is a triangle, and the number of the cutouts 743 corresponds to the number of the rolling elements 730. The rolling elements 730 may be conventional spherical rollers.

[0028] When the rotating pressure plate 73 rotates, due to the limiting effect of the cut-out portion 743, the substrate 71, the rotating motor 72 and the rotating pressure plate 73 can move up and down, thereby realizing the movement process of the rotating pressure plate 73 gradually pressing downward during the rotation process, which can effectively achieve the limiting effect on the product while avoiding scratching the product during rotation.

[0029] Furthermore, the rotating pressure plate 73 includes a fixed plate 732 and a movable plate 733. The movable plate 733 is detachably fixed in front of the fixed plate 732. The movable plate 733 can be made of a plastic material with a certain elasticity and a soft texture. The end thereof can be flat or can be provided with a corresponding shape according to the shape of the product. Through the setting of the fixed plate 732 and the movable plate 733, adaptation to different molds can be achieved by replacing the movable plate 733.

[0030] Furthermore, the pressing component assembly 7 also includes a plurality of pads 74, and the pads 74 are arranged below the lower base plate 70. Through the arrangement of the pads, the height difference between the rotating pressing plate 73 and the rotating disk 3 can be adjusted to achieve adaptation to different molds.

[0031] The pad 74 may also be arranged on the opposite side of the pressure piece assembly 7 to ensure uniform mass distribution on the rotating disk 3 .

[0032] It should be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

Claims

1. A two-color injection mold, characterized in that: It includes a first lower die, a second lower die, a rotating disk, a first upper die, a second upper die, an upper die disk, and a pressure piece assembly; the first lower die and the second lower die are fixed on the rotating disk, and the first upper die and the second upper die are fixed to the upper die disk; the pressure piece assembly includes a base plate, a rotating motor, and a rotating pressure plate; the base plate is detachably fixedly connected to the rotating disk, located on one side of the first lower die and / or the second lower die, the rotating motor is arranged on the base plate, and one side of the rotating pressure plate is fixedly connected to the output shaft of the rotating motor.

2. A two-color injection mold according to claim 1, characterized in that: The pressure piece assembly also includes a lower base plate and a lower pressure limiting structure. The lower part of the base plate is connected to the upper part of the lower base plate through a plurality of elastic parts. A plurality of limiting rods are arranged on the lower base plate. The upper part of the limiting rods passes through the through holes on the base plate. The lower base plate can be detachably fixedly connected to the rotating disk.

3. A two-color injection mold according to claim 2, characterized in that: The downward pressure limiting structure includes a limiting ring, which is fixed to the lower base plate by a fixed L-shaped plate, and its axis coincides with the axis of the rotating shaft of the rotating motor. A plurality of rolling elements are arranged on the rotating pressure plate below the limiting ring, and the rolling elements cooperate with the limiting ring. A plurality of cut-out portions are arranged below the limiting ring, and the number of the cut-out portions corresponds to the number of the rolling elements.

4. A two-color injection mold according to claim 1, characterized in that: The rotating pressure plate comprises a fixed plate and a movable plate, and the movable plate is detachably fixed in front of the fixed plate.

5. A two-color injection mold according to claim 1, characterized in that: The pressing component assembly also includes a plurality of pads, and the pads are arranged below the lower base plate.

6. A two-color injection mold according to claim 5, characterized in that: The backing plate is arranged on a side opposite to the pressing piece assembly.

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