Double-color injection mold

Abstract

The utility model belongs to the technical field of injection molds, and relates to a double-color injection mold which comprises a mold core, a fixed support is arranged on the rear side of the mold core, a sliding seat capable of moving up and down is arranged in the fixed support in a sliding mode, and an upper-layer bottom plate and a lower-layer bottom plate are arranged in the sliding seat. An upper-layer sliding block capable of moving front and back is arranged on the upper-layer bottom plate in a sliding mode, a lower-layer sliding block capable of moving front and back is arranged on the lower-layer bottom plate in a sliding mode, and a horizontal oil cylinder for driving the upper-layer sliding block or the lower-layer sliding block to slide is arranged in the middle of the fixing support. And detachable hooking structures are arranged between the piston rod of the horizontal oil cylinder and the upper-layer sliding block and between the piston rod of the horizontal oil cylinder and the lower-layer sliding block. The double-color injection mold provided by the utility model has the advantages of simple structure, low cost, high precision and good adaptability.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds and relates to a double-color injection mold. Background Art

[0002] As product appearance requirements increase, the demand for two-shot injection molded products is increasing. Compared to traditional assembly parts, two-shot injection molded products eliminate gaps in assembly and offer a more aesthetically pleasing appearance. Two-shot injection molded products are typically produced using two-shot injection molds. A two-shot mold is a mold in which two plastic materials are injected on the same injection molding machine, forming the product in two separate molding steps, but the product is ejected only once.

[0003] The most commonly used two-color injection mold is the core-rotating two-color mold. Its key feature is that the core and shell of the product are swapped by rotating the core, allowing two different colored materials to be injected into the same part, achieving a two-color effect. The core is a rotatable component within the mold cavity. Its structure primarily includes a mandrel, core block, core sleeve, and spring. The core can rotate during the injection process, allowing the two core shells to swap. This type of mold requires very high machining precision and technical requirements, and the maintenance and upkeep of the rotating core also incurs additional costs. Therefore, it is necessary to develop a new two-color injection mold to reduce mold costs. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a two-color injection mold, which has the advantages of simple structure, low cost, high precision and good adaptability.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A two-color injection mold includes a core, a fixed bracket is provided on the rear side of the core, a sliding seat that moves up and down is slidably provided in the fixed bracket, an upper base plate and a lower base plate are provided in the sliding seat, the upper base plate is slidably provided with an upper slider that moves back and forth, and the lower base plate is slidably provided with a lower slider that moves back and forth, a horizontal cylinder that drives the upper slider or the lower slider to slide is provided in the middle of the fixed bracket, and a detachable hook structure is provided between the piston rod of the horizontal cylinder and the upper slider and the lower slider.

[0007] In the above-mentioned two-color injection mold, the hook connection includes a T-shaped block arranged at the front end of the horizontal cylinder piston rod and a T-shaped slot arranged at the rear ends of the upper slider and the lower slider. The T-shaped slot is hooked with the T-shaped block to form an axial limiting structure, and the T-shaped slot is an upper and lower through slot that can be vertically detached from the T-shaped block; when the T-shaped slot is hooked with the T-shaped block, the horizontal cylinder can drive the upper slider and the lower slider to slide back and forth in the horizontal direction. When the upper slider or the lower slider moves vertically with the sliding seat, its hook structure is detached.

[0008] In the above-mentioned two-color injection mold, the hooking structure can also use other structures, such as a card block with a barb and a card slot adapted thereto. After the card block and the card slot are hooked, the horizontal cylinder can drive the upper slider and the lower slider in the horizontal direction. When the hooking structure of the two is subjected to a vertical external force, the hooking structure will detach.

[0009] In the above-mentioned two-color injection mold, the rear ends of the upper base plate and the lower base plate are provided with avoidance grooves that cooperate with the T-shaped blocks on the horizontal cylinder piston rod. When the horizontal cylinder piston rod is retracted, when the upper slider and the lower slider move vertically, the T-shaped blocks can pass through the avoidance grooves.

[0010] In the above-mentioned two-color injection mold, the fixed bracket includes a fixed base plate, a rear bracket and side brackets distributed on the left and right sides. The left and right sides of the sliding seat slide on the left and right side brackets respectively. The horizontal cylinder is installed on the rear side of the rear bracket, and its piston rod passes through the rear bracket forward.

[0011] In the above-mentioned two-color injection mold, vertical cylinders for driving the sliding seat to move up and down are respectively provided on both sides of the sliding seat, and the piston rods of the vertical cylinders are connected to the fixed base plate.

[0012] In the above-mentioned two-color injection mold, the sliding structure between the fixed bracket and the sliding seat, the sliding structure between the upper base plate and the upper slider, and the sliding structure between the lower base plate and the lower slider all adopt a slide rail and slider structure.

[0013] In the above-mentioned two-color injection mold, an upper hanging seat is provided on the fixed bracket above the horizontal oil cylinder, and a lower hanging seat is provided on the fixed bracket below. The upper hanging seat and the lower hanging seat are T-shaped seats adapted to the T-shaped slot. After the upper slider is separated from the horizontal oil cylinder, it slides along the upper hanging seat and forms a hanging structure. After the lower slider is separated from the horizontal oil cylinder, it slides along the lower hanging seat and forms a hanging structure.

[0014] In the above-mentioned two-color injection mold, the upper slider includes an upper base arranged at the bottom thereof, and the T-shaped groove of the upper slider and the sliding structure between the upper slider and the upper base plate are all arranged on the upper base; the lower slider includes a lower base arranged at the bottom thereof, and the T-shaped groove of the lower slider and the sliding structure between the lower slider and the lower base plate are all arranged on the lower base.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model provides a two-shot injection mold that utilizes upper and lower sliders that slide up and down to switch the cavity structures corresponding to the two injection moldings. Furthermore, a detachable hook structure automatically assembles the drive cylinders of the upper and lower sliders. This utility model eliminates the need for a rotary switching mechanism and achieves automatic cavity switching through a simple sliding motion, significantly reducing the requirements for machining precision and technology, and thus significantly reducing mold costs. This utility model also offers the advantages of a simple structure, easy maintenance, and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the first state of the utility model (including the core);

[0018] Figure 2 It is a three-dimensional diagram of the first state of the present invention (excluding the core);

[0019] Figure 3 This is the front view of the utility model in state 1 (excluding the core);

[0020] Figure 4 It is a top view of the first state of the utility model (excluding the core);

[0021] Figure 5 It is a three-dimensional diagram of the second state of the utility model (excluding the core);

[0022] Figure 6 This is the front view of the second state of the utility model (excluding the core);

[0023] Figure 7 It is a top view of the second state of the utility model (excluding the core);

[0024] Figure 8 It is a three-dimensional diagram of the fixing bracket of the utility model;

[0025] Figure numerals: 1. core; 2. fixed bracket; 3. sliding seat; 4. upper base plate; 5. lower base plate; 6. upper slider; 7. lower slider; 8. horizontal cylinder; 9. T-block; 10. T-slot; 11. avoidance groove; 12. fixed base plate; 13. rear bracket; 14. side bracket; 15. vertical cylinder; 16. upper hanging seat; 17. lower hanging seat; 18. upper base; 19. lower base. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-8 :

[0027] A two-color injection mold, comprising:

[0028] The core 1 is a fixed part, which cooperates with the upper slider 6 to form a cavity structure in a first state, and cooperates with the lower slider 7 to form a cavity structure in a second state. The cavity structure in the first state and the cavity structure in the second state correspond to the two injection states of two-color injection molding respectively;

[0029] The sliding seat 3 is driven by a vertical cylinder to move up and down. An upper base plate 4 and a lower base plate 5 are provided in the sliding seat 3. The upper base plate 4 is provided with an upper slider 6 that moves forward and backward, and the lower base plate 5 is provided with a lower slider 7 that moves forward and backward. The sliding seat 3 drives the upper slider 6 and the lower slider 7 to move up and down to switch the inserts used for injection molding; in the first state, the upper slider 6 moves to the middle working position and the lower slider 7 moves to the lower hanging position; in the second state, the lower slider 7 moves to the middle working position and the upper slider 6 moves to the upper hanging position; the upper slider 6 or the lower slider 7 located in the working position moves forward and enters the matching position connected to the core 1;

[0030] The fixed bracket 2 is used as a support for the up and down movement of the sliding seat 3, and is also used to install the horizontal cylinder 8 that drives the upper slider 6 and the lower slider 7 to slide horizontally, wherein a detachable hook structure is provided between the piston rod of the horizontal cylinder 8 and the upper slider 6 and the lower slider 7.

[0031] In this embodiment, the hook connection includes a T-shaped block 9 arranged at the front end of the piston rod of the horizontal cylinder 8 and a T-shaped slot 10 arranged at the rear ends of the upper slider 6 and the lower slider 7. The T-shaped slot 10 is hooked with the T-shaped block 9 to form an axial limiting structure. The T-shaped slot 10 is an upper and lower through slot that can be vertically detached from the T-shaped block 9; when the T-shaped slot 10 is hooked with the T-shaped block 9, the horizontal cylinder 8 can drive the upper slider 6 and the lower slider 7 to slide back and forth in the horizontal direction. When the upper slider 6 or the lower slider 7 moves vertically with the sliding seat 3, its hook structure is detached.

[0032] Before switching the upper slider 6 and the lower slider 7, the horizontal cylinder 8 first pulls the used insert to the rear end. In order to enable the upper base plate 4 and the lower base plate 5 to move up and down, the rear ends of the upper base plate 4 and the lower base plate 5 are provided with an avoidance groove 11 that cooperates with the T-shaped block 9 on the piston rod of the horizontal cylinder 8. When the piston rod of the horizontal cylinder 8 is retracted, when the upper slider 6 and the lower slider 7 move vertically, the T-shaped block 9 can pass through the avoidance groove 11.

[0033] In this embodiment, the up and down driving structure of the sliding seat 3 is: the fixed bracket 2 includes a fixed base plate 12, a rear bracket 13 and side brackets 14 distributed on the left and right sides, the left and right sides of the sliding seat 3 slide on the left and right side brackets 14 respectively, and the horizontal cylinder 8 is installed on the rear side of the rear bracket 13, and its piston rod passes through the rear bracket 13 forward.

[0034] Furthermore, vertical cylinders 15 for driving the sliding seat 3 to move up and down are respectively provided on both sides of the sliding seat 3 , and piston rods of the vertical cylinders 15 are connected to the fixed base plate 12 .

[0035] The sliding structure between the fixed bracket 2 and the sliding seat 3, the sliding structure between the upper bottom plate 4 and the upper slider 6, and the sliding structure between the lower bottom plate 5 and the lower slider 7 all adopt the structure of slide rails and sliders.

[0036] Compare with Figure 8 When the upper slider 6 or the lower slider 7 is separated from the horizontal cylinder 8, this embodiment further provides a hanging structure to keep it stable: an upper hanging seat 16 is provided on the fixed bracket 2 above the horizontal cylinder 8, and a lower hanging seat 17 is provided on the fixed bracket 2 below. The upper hanging seat 16 and the lower hanging seat 17 are T-shaped seats adapted to the T-shaped slot 10. After the upper slider 6 is separated from the horizontal cylinder 8, it slides along the upper hanging seat 16 and forms a hanging structure. After the lower slider 7 is separated from the horizontal cylinder 8, it slides along the lower hanging seat 17 and forms a hanging structure.

[0037] The functional components and driving components of the upper slider 6 and the lower slider 7 of this embodiment are designed in combination so that they do not interfere with each other. The functional components are used to cooperate with the core 1, and the driving components are used to support sliding. The specific structure is: the upper slider 6 includes an upper base 18 arranged at the bottom thereof, and the T-shaped groove 10 of the upper slider 6 and the sliding structure between the upper slider 6 and the upper bottom plate 4 are all arranged on the upper base 18; the lower slider 7 includes a lower base 19 arranged at the bottom thereof, and the T-shaped groove 10 of the lower slider 7 and the sliding structure between the lower slider 7 and the lower bottom plate 5 are all arranged on the lower base 19.

[0038] Compare with Figure 1 To the attached Figure 4 In the first state, the sliding seat 3 is located at the lowermost position. At this time, the upper slider 6 is in the working position, and its T-shaped slot 10 forms a hooking structure with the T-shaped block 9. When the piston rod of the horizontal oil cylinder 8 is extended and retracted, the upper slider 6 is driven to move forward and backward. When it moves to the front end, the first injection molding can be carried out; at the same time, the lower slider 7 is in the hanging position, and its T-shaped slot 10 is hung on the lower hanging seat 17.

[0039] When the first state is converted to the second state, the piston rod of the horizontal cylinder 8 first contracts, pulling the upper slider 6 to the rear end, and then the piston rod of the vertical cylinder 15 extends, driving the sliding seat 3 to move upward. While moving, the T-slot 10 of the upper slider 6 gradually disengages from the T-block 9, enters the upper hanging seat 16 and slides upward along the upper hanging seat 16. The avoidance groove 11 of the upper bottom plate 4 passes over the T-block 9 and continues to move upward. The lower slider 7 moves upward along the lower hanging seat 17 and finally fits into the T-block 9 to form a hooking structure.

[0040] Compare with Figure 5 To the attached Figure 6 In the second state, the sliding seat 3 is located at the uppermost position. At this time, the lower slider 7 is in the working position, and its T-shaped slot 10 forms a hooking structure with the T-shaped block 9. When the piston rod of the horizontal oil cylinder 8 is extended and retracted, it drives the lower slider 7 to move forward and backward. When it moves to the front end, the second injection molding can be carried out; at the same time, the upper slider 6 is in the hanging position, and its T-shaped slot 10 is hung on the upper hanging seat 16.

[0041] The process of converting from the second state to the first state is similar to the above process and will not be repeated here.

[0042] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-color injection mold, comprising a core (1), characterized in that: A fixed bracket (2) is provided on the rear side of the core (1), a sliding seat (3) that moves up and down is slidably provided in the fixed bracket (2), an upper bottom plate (4) and a lower bottom plate (5) are provided in the sliding seat (3), an upper slider (6) that moves forward and backward is slidably provided on the upper bottom plate (4), and a lower slider (7) that moves forward and backward is slidably provided on the lower bottom plate (5), a horizontal oil cylinder (8) that drives the upper slider (6) or the lower slider (7) to slide is provided in the middle of the fixed bracket (2), and a detachable hook structure is provided between the piston rod of the horizontal oil cylinder (8) and the upper slider (6) and the lower slider (7).

2. A two-color injection mold according to claim 1, characterized in that: The hook connection comprises a T-shaped block (9) arranged at the front end of the piston rod of the horizontal oil cylinder (8) and a T-shaped slot (10) arranged at the rear ends of the upper slider (6) and the lower slider (7). The T-shaped slot (10) and the T-shaped block (9) are hooked to form an axial limiting structure. The T-shaped slot (10) is an upper and lower through slot that can be vertically separated from the T-shaped block (9).

3. A two-color injection mold according to claim 2, characterized in that: The rear ends of the upper bottom plate (4) and the lower bottom plate (5) are provided with avoidance grooves (11) that cooperate with the T-shaped blocks (9) on the piston rods of the horizontal oil cylinders (8).

4. A two-color injection mold according to claim 2, characterized in that: The fixed support (2) comprises a fixed base plate (12), a rear support (13) and side supports (14) distributed on the left and right sides. The left and right sides of the sliding seat (3) slide on the left and right side supports (14) respectively. The horizontal oil cylinder (8) is installed on the rear side of the rear support (13), and its piston rod penetrates the rear support (13) forward.

5. The double-color injection mold according to claim 4, characterized in that: Vertical cylinders (15) for driving the sliding seat (3) to move up and down are respectively provided on both sides of the sliding seat (3), and piston rods of the vertical cylinders (15) are connected to the fixed base plate (12).

6. The two-color injection mold according to claim 2, characterized in that: An upper hanging seat (16) is provided on the fixed bracket (2) above the horizontal oil cylinder (8), and a lower hanging seat (17) is provided on the fixed bracket (2) below the horizontal oil cylinder (8). The upper hanging seat (16) and the lower hanging seat (17) are T-shaped seats adapted to the T-shaped groove (10). After the upper slider (6) is separated from the horizontal oil cylinder (8), it slides along the upper hanging seat (16) to form a hanging structure. After the lower slider (7) is separated from the horizontal oil cylinder (8), it slides along the lower hanging seat (17) to form a hanging structure.

7. The two-color injection mold according to claim 2, characterized in that: The upper slider (6) includes an upper base (18) arranged at the bottom thereof, and the T-shaped groove (10) of the upper slider (6) and the sliding structure between the upper slider (6) and the upper bottom plate (4) are all arranged on the upper base (18); the lower slider (7) includes a lower base (19) arranged at the bottom thereof, and the T-shaped groove (10) of the lower slider (7) and the sliding structure between the lower slider (7) and the lower bottom plate (5) are all arranged on the lower base (19).

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