Double-color injection molding mold

Abstract

The utility model relates to a double-color injection molding mold in the field of molds, which comprises a movable mold, a first injection fixed mold and a second injection fixed mold, the first injection fixed mold and the second injection fixed mold are respectively provided with an injection molding assembly and a concave mold assembly, the movable mold is provided with a convex mold assembly and an ejection assembly, the concave mold assembly comprises an injection molding block and a concave mold sliding block, the injection molding block is arranged at one end of the movable mold, and the convex mold sliding block is arranged at the other end of the movable mold. The female die sliding block is arranged around the injection molding block, the first injection fixed die and the second injection fixed die are both provided with sliding grooves matched with the female die sliding block, the male die assembly comprises a male die block and a shovel base block, the male die block is arranged at one end of the movable die, and the shovel base block is arranged around the male die block and matched with the female die sliding block. Through the cooperation of the injection molding block, the concave mold sliding block and the convex mold block, two materials can be molded in one injection molding period, so that the use efficiency of the mold and the functionality of a product are improved. And through the matching of the shovel base block and the female die sliding block, the core pulling or resetting action is realized in the die opening or closing process, so that the die structure is simplified, and the manufacturing cost of the die is reduced.

Description

Technical Field

[0001] This utility model relates to the field of molds, specifically to a two-color injection molding mold. Background Technology

[0002] Injection molds are specialized tools used in plastic injection molding processes. They work by injecting molten plastic into a mold cavity, followed by cooling and solidification to obtain the desired plastic product. These molds can efficiently and precisely produce plastic products with various complex shapes and high precision requirements, such as automotive parts, electronic casings, home appliances, and toys. Due to their efficiency and precision in the production process, injection molds play a crucial role in modern industrial production and have become an indispensable part of modern manufacturing. Furthermore, with technological advancements, the automation level of injection molds is continuously improving. Continuous production can be achieved through simple operations, significantly reducing the need for manual labor and increasing production efficiency.

[0003] While existing injection molds can achieve high-efficiency and high-precision production, they still have limitations when handling certain special materials or complex structures. Traditional single-shot molds often fail to meet the requirements when producing plastic products with multi-layered structures or requiring combinations of different materials. This necessitates the use of multiple molds to separately injection mold parts and then assemble them, which not only increases production costs but also extends the production cycle. Therefore, this invention proposes a two-color injection molding mold. Summary of the Invention

[0004] This utility model provides a two-color injection molding die, which solves the problem that existing injection molds require multiple sets of molds to separately inject and assemble parts when producing multi-layered or multi-material plastic products, by having the moving mold cooperate with the first-shot fixed mold and the second-shot fixed mold respectively.

[0005] The objective of this utility model is achieved through the following means:

[0006] A two-color injection molding die includes a moving mold and a first-shot fixed mold and a second-shot fixed mold that respectively cooperate with the moving mold. One end of the first-shot fixed mold and the second-shot fixed mold is provided with an injection assembly. The first-shot fixed mold and the second-shot fixed mold are each provided with a plurality of cavity mold assemblies that cooperate with the injection assembly. The moving mold is provided with a punch assembly and an ejection assembly that cooperate with the cavity mold assemblies.

[0007] The cavity mold assembly includes an injection block and a slidable cavity mold slider. The injection block is fixedly installed at one end of the moving mold, and the cavity mold slider is arranged around the injection block. Both the first-shot fixed mold and the second-shot fixed mold are provided with sliding grooves that cooperate with the cavity mold slider.

[0008] The punch assembly includes a punch module and a shovel base block. The punch module is fixedly installed at one end of the moving die, and the shovel base block is arranged around the punch module and slides with the die slider.

[0009] Furthermore, both the first-shot mold and the second-shot mold are provided with limiting blocks, the die slider is provided with limiting grooves that cooperate with the limiting blocks, and one end of the limiting block is provided with a support spring that cooperates with the first-shot mold and the second-shot mold.

[0010] Furthermore, a guide groove is provided on one side of the die slider, and a guide block that cooperates with the guide groove is provided on one side of the shovel base block.

[0011] Furthermore, both the guide block and the guide groove are T-shaped structures.

[0012] Furthermore, the die slider is provided with a slidable push block, a return spring is provided between the push block and the die slider, and a forming block is provided at one end of the push block to cooperate with the die slider.

[0013] Furthermore, the injection molding assembly includes a nozzle and a guide plate. The nozzle and the guide plate are fixedly installed at one end of the first-shot mold and the second-shot mold. One end of the nozzle passes through one end of the guide plate. Both the first-shot mold and the second-shot mold are provided with guide grooves that cooperate with the guide plate.

[0014] Furthermore, the ejection assembly includes a sliding plate, a compression spring, and a top block. The sliding plate is slidably disposed within the moving mold, the compression spring is disposed between the sliding plate and the moving mold, one end of the sliding plate is provided with a connecting rod, and the top block is fixedly installed on one end of the connecting rod and slides in cooperation with the protrusion module.

[0015] The beneficial effects of this invention are as follows: By cooperating with the injection block, the cavity slider, and the punch, two different materials can be molded in one injection cycle, thereby improving the efficiency of the mold and the functionality of the product. Furthermore, the sliding cooperation between the base block and the cavity slider enables core pulling or resetting during mold opening or closing, thus simplifying the mold structure and reducing manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a two-color injection molding die according to the present invention;

[0017] Figure 2 This is a first sectional view of a two-color injection molding die according to the present invention;

[0018] Figure 3This is a second sectional view of a two-color injection molding die according to the present invention;

[0019] Figure 4 for Figure 2 Enlarged diagram of A in the middle;

[0020] Figure 5 This is a schematic diagram of the moving mold in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the injection mold in this utility model;

[0022] Figure 7 This is a schematic diagram of the flow guide channel in this utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the concave die slider in this utility model;

[0024] The reference numerals in the figure are as follows: 1-moving mold, 2-first injection fixed mold, 3-second injection fixed mold, 4-injection assembly, 41-squeegee, 42-guide plate, 5-cavity mold assembly, 51-injection block, 52-cavity mold slider, 521-limiting groove, 522-guide groove, 523-push block, 524-reset spring, 525-forming block, 6-punch assembly, 61-punch module, 62-shovel base block, 621-guide block, 7-ejection assembly, 71-sliding plate, 72-compression spring, 73-ejector block, 74-connecting rod, 8-sliding groove, 9-limiting block, 10-support spring, 11-guide groove. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] In this embodiment, refer to Figures 1-8 The present invention relates to a two-color injection molding die, comprising a moving mold 1 and a first-shot fixed mold 2 and a second-shot fixed mold 3 that respectively cooperate with the moving mold 1. One end of the first-shot fixed mold 2 and the second-shot fixed mold 3 is provided with an injection assembly 4. Both the first-shot fixed mold 2 and the second-shot fixed mold 3 are provided with a plurality of cavity mold assemblies 5 that cooperate with the injection assembly 4. The moving mold 1 is provided with a punch assembly 6 and an ejection assembly 7 that cooperate with the cavity mold assembly 5. The cavity mold assembly 5 includes an injection block 51 and a slidable cavity mold slider 52. The injection block 51 is fixedly installed at one end of the moving mold 1, and the cavity mold slider 52 is arranged around the injection block 51. Both the first-shot fixed mold 2 and the second-shot fixed mold 3 are provided with sliding grooves 8 that cooperate with the cavity mold slider 52. The punch assembly 6 includes a punch module 61 and a spade base block 62. The punch module 61 is fixedly installed at one end of the moving mold 1, and the spade base block 62 is arranged around the punch module 61 and slides with the cavity mold slider 52.

[0027] Driven by the injection molding machine, the moving mold 1 engages with the first-shot fixed mold 2 and the second-shot fixed mold 3, enabling the molding of two different materials within a single injection cycle, thus improving mold efficiency and product functionality. When the mold closes, the spade base block 62 slides within the groove slider 8, engaging with the injection block 51 and the punch block 61 to form a complete injection space for injection molding. When the mold opens, the cavity slider 52, under the action of the spade base block 62, slides along the groove 8, separating from the punch block 61 and the injection block 51, thereby achieving product demolding.

[0028] Furthermore, both the first-shot mold 2 and the second-shot mold 3 are equipped with limiting blocks 9, and the die slider 52 is equipped with a limiting groove 521 that cooperates with the limiting blocks 9. One end of the limiting block 9 is equipped with a support spring 10 that cooperates with the first-shot mold 2 and the second-shot mold 3. Through the cooperation between the support spring 10 and the limiting block 9, the limiting block 9 firmly presses against the limiting groove 521, thereby ensuring that the die slider 52 remains stable during sliding and avoiding displacement caused by vibration or external force. In addition, the cooperation between the limiting block 9 and the limiting groove 521 can also precisely control the movement range of the die slider 52, ensuring the accuracy of injection molding.

[0029] Furthermore, a guide groove 522 is provided on one side of the die slider 52, and a guide block 621 that mates with the guide groove 522 is provided on one side of the base block 62. Both the guide block 621 and the guide groove 522 are T-shaped structures. Through the tight fit between the guide block 621 and the guide groove 522, the die slider 52 can maintain precise linear movement during mold opening and closing, avoiding errors caused by uneven sliding. The T-shaped structure design of the guide block 621 and the guide groove 522 not only increases the contact area and improves guiding accuracy, but also effectively disperses and withstands forces from different directions, ensuring the stability and durability of the mold during high-speed operation.

[0030] The die slider 52 has a slidable push block 523 inside, and a return spring 524 is provided between the push block 523 and the die slider 52. One end of the push block 523 has a molding block 525 that cooperates with the die slider 52. The molding block 525 is used to form grooves and other structures to meet the production needs of plastic products of different shapes and sizes. The groove slider has a locking block that cooperates with the molding block 525. In this embodiment, the molding block 525 is used to form a groove-shaped structure. When the mold is opened, the molding block 525 slides upward with the movement of the die slider 52 through the cooperation of the return spring 524, the push block 523 and the die slider 52, thereby disengaging from the groove. When the mold is closed, it returns to its original position with the movement of the die slider 52, thereby cooperating with the injection block 51 to complete the molding process of the plastic product. The setting of the return spring 524 and the push block 523 ensures that the molding block 525 is always in contact with the die slider 52, ensuring its smooth sliding. Improve the precision of the forming block 525 in the die slide 52 to ensure machining quality.

[0031] Injection assembly 4 includes a nozzle 41 and a guide plate 42. The nozzle 41 and guide plate 42 are fixedly installed at one end of the first-shot mold 2 and the second-shot mold 3. One end of the nozzle 41 passes through one end of the guide plate 42. Both the first-shot mold 2 and the second-shot mold 3 are provided with guide channels 11 that cooperate with the guide plate 42. The guide channels 11 communicate with the injection block 51, allowing the molten plastic to smoothly enter the cavity through the guide channels 11. Through the cooperation of the nozzle 41, the guide plate 42, and the guide channels 11, the molten plastic is effectively guided and distributed before entering the cavity, ensuring the uniformity and consistency of injection molding. The design of the guide plate 42 can reduce turbulence and pressure loss of the molten plastic during the flow process, thereby improving the efficiency of injection molding.

[0032] The ejection assembly 7 includes a sliding plate 71, a compression spring 72, and an ejector block 73. The sliding plate 71 is slidably disposed within the moving mold 1. A return spring 524 is disposed between the sliding plate 71 and the moving mold 1. One end of the sliding plate 71 is provided with a connecting rod 74. The ejector block 73 is fixedly installed on one end of the connecting rod 74 and slides in cooperation with the protrusion module 61. The other end of the sliding plate 71 is connected to an external driving element such as a cylinder, thereby controlling the sliding of the sliding plate 71 within the moving mold 1. When the sliding plate 71 slides, it drives the ejector block 73 to slide together through the connecting rod 74, thereby causing the ejector block 73 to contact the molded workpiece and eject it, completing the demolding process. The return spring 524 enables the sliding plate 71 to quickly return to its initial position after demolding, ready for the next injection cycle. This ensures the continuity and automation of the entire injection molding process.

[0033] The beneficial effects of this utility model are as follows: Through the cooperation of the injection block 51, the cavity slider 52, and the punch 61, two different materials can be molded in one injection cycle, thereby improving the efficiency of the mold and the functionality of the product. Furthermore, the sliding cooperation between the base block 62 and the cavity slider 52 enables core pulling or resetting during mold opening or closing, thus simplifying the mold structure and reducing the mold manufacturing cost.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A two-color injection molding die, comprising a movable mold (1) and a first-shot fixed mold (2) and a second-shot fixed mold (3) respectively cooperating with the movable mold (1), wherein one end of the first-shot fixed mold (2) and the second-shot fixed mold (3) is provided with an injection molding assembly (4), characterized in that: Both the first-shot mold (2) and the second-shot mold (3) are provided with a plurality of cavity mold assemblies (5) that cooperate with the injection assembly (4), and the moving mold (1) is provided with a punch assembly (6) that cooperates with the cavity mold assembly (5) and an ejection assembly (7). The cavity mold assembly (5) includes an injection block (51) and a slidable cavity mold slider (52). The injection block (51) is fixedly installed at one end of the moving mold (1), and the cavity mold slider (52) is arranged around the injection block (51). The first-shot fixed mold (2) and the second-shot fixed mold (3) are both provided with sliding grooves (8) that cooperate with the cavity mold slider (52). The punch assembly (6) includes a punch module (61) and a shovel base block (62). The punch module (61) is fixedly installed at one end of the moving die (1). The shovel base block (62) is arranged around the punch module (61) and slides in cooperation with the die slider (52).

2. The two-color injection molding die according to claim 1, characterized in that: Both the first-shot mold (2) and the second-shot mold (3) are provided with limiting blocks (9), the die slider (52) is provided with limiting grooves (521) that cooperate with the limiting blocks (9), and one end of the limiting block (9) is provided with a support spring (10) that cooperates with the first-shot mold (2) and the second-shot mold (3).

3. The two-color injection molding die according to claim 1, characterized in that: The die slider (52) has a guide groove (522) on one side, and the shovel base block (62) has a guide block (621) on one side that cooperates with the guide groove (522).

4. The two-color injection molding die according to claim 3, characterized in that: Both the guide block (621) and the guide groove (522) are T-shaped structures.

5. A two-color injection molding die according to any one of claims 1-4, characterized in that: The die slider (52) is provided with a slidable push block (523), and a return spring (524) is provided between the push block (523) and the die slider (52). One end of the push block (523) is provided with a forming block (525) that cooperates with the die slider (52).

6. The two-color injection molding die according to claim 1, characterized in that: The injection molding assembly (4) includes a nozzle (41) and a guide plate (42). The nozzle (41) and the guide plate (42) are fixedly installed at one end of the first-shot mold (2) and the second-shot mold (3). One end of the nozzle (41) passes through one end of the guide plate (42). Both the first-shot mold (2) and the second-shot mold (3) are provided with guide grooves (11) that cooperate with the guide plate (42).

7. The two-color injection molding die according to claim 1, characterized in that: The ejection assembly (7) includes a sliding plate (71), a compression spring (72), and a top block (73). The sliding plate (71) is slidably disposed in the moving mold (1). The compression spring (72) is disposed between the sliding plate (71) and the moving mold (1). One end of the sliding plate (71) is provided with a connecting rod (74). The top block (73) is fixedly installed on one end of the connecting rod (74) and slides in cooperation with the protruding module (61).

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