Injection molding equipment for double-color injection molding

Abstract

The utility model relates to the technical field of injection molding, in particular to injection molding equipment for double-color injection molding. According to the technical scheme, the device comprises a base, injection molding machines, a movable mold and a fixed mold, the injection molding machines are symmetrically and fixedly installed at the positions, close to the front surface and the rear surface, of one side of the upper surface of the base, and a U-shaped moving frame is slidably installed on the side, away from the injection molding machines, of the upper surface of the base; three fixed molds are fixedly installed on the inner side of the rotary disc in an annular array at equal intervals, movable molds are arranged on the inner sides of the three fixed molds, and hydraulic cylinders are fixedly connected to the positions, close to the three fixed molds, of the outer side of the rotary disc. In the double-color injection molding process, molten plastic of a first color and molten plastic of a second color can be synchronously injected into the two sets of molds respectively, meanwhile, the third mold is opened to take a part, so that the two injection molding machines are always in a working state, the time delayed by opening the mold to take the part is also saved, and the injection molding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to an injection molding equipment for two-color injection molding. Background Technology

[0002] Two-color injection molding is an advanced injection molding process that uses a specially designed two-color injection molding machine and mold to sequentially inject two different colors or materials of plastic into the same mold cavity, thereby creating plastic products with two-color or two-material effects. First, the first type of plastic is injected into the mold and formed as part of the product. Then, the mold rotates or moves to position the formed part in the appropriate position. Next, the second type of plastic is injected and combines with the first type of plastic to form a complete product with a unique appearance or specific function. This process not only brings a rich variety of appearance effects to the product, but also enables the combined application of different materials in the same product, improving the product's performance and added value. It is widely used in fields with high requirements for appearance and function, such as mobile phone casings, automotive interior parts, and home appliance panels.

[0003] Currently, in the process of two-color injection molding, when one color of molten plastic is injected into the mold by the injection molding machine, the extrusion equipment responsible for injecting the other color of molten plastic is stopped. Furthermore, both injection molding machines are stopped during the mold opening and part removal process, which leads to an increase in injection time and a reduction in injection efficiency. To address this, we propose an injection molding equipment for two-color injection molding. Utility Model Content

[0004] The purpose of this invention is to provide an injection molding device for two-color injection molding, which can simultaneously inject molten plastic of the first color and the second color into two sets of molds during the two-color injection molding process, and simultaneously open the third mold to remove the part. This ensures that both injection molding machines are always in working condition, saves the time wasted on mold opening and part removal, and improves injection molding efficiency. It solves the problem that in the current two-color injection molding process, when one color of molten plastic is injected into the mold by the injection molding machine, the extrusion equipment responsible for injecting the other color of molten plastic is in a stopped state, and when the mold is opened and the part is removed, both injection molding machines are in a stopped state, which leads to increased injection time and reduced injection molding efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-color injection molding equipment, comprising a base, an injection molding machine, a moving mold, and a fixed mold. The injection molding machine is symmetrically fixedly installed on one side of the upper surface of the base near the front and rear surfaces. A U-shaped moving frame is slidably installed on the side of the upper surface of the base away from the injection molding machine. A turntable is rotatably installed inside the U-shaped moving frame via a rotating shaft. Three fixed molds are fixedly installed in a circular array at equal intervals on the inner side of the turntable. A moving mold is provided inside each of the three fixed molds. A hydraulic cylinder is fixedly connected to the outer side of the turntable near the three fixed molds. The output ends of the three hydraulic cylinders are respectively fixedly connected to the outer surfaces of the three moving molds via connecting frames, and the connecting frames penetrate the turntable.

[0006] Preferably, a groove is provided on the upper surface of the base at the position below the U-shaped movable frame, and a slider is fixedly installed on the lower surface of the U-shaped movable frame, with the slider located inside the groove.

[0007] Preferably, a movable cylinder is fixedly installed on the upper surface of the base near the outer side of the U-shaped movable frame, and the output end of the movable cylinder is fixedly connected to the outer side of the U-shaped movable frame.

[0008] Preferably, a rotating motor is fixedly installed on the outside of the U-shaped moving frame, and the end of the output shaft of the rotating motor is fixedly connected to the end of the rotating shaft.

[0009] Preferably, a U-shaped fixing frame is fixedly installed at the bottom of the inner wall of the U-shaped moving frame, and fixing cylinders are symmetrically fixedly installed on both sides of the outer surface of the U-shaped fixing frame. Friction blocks are fixedly installed at the output ends of the two fixing cylinders, and the two friction blocks are respectively located on both sides of the turntable.

[0010] Preferably, a shielding strip is fixedly installed on the outer surface of the turntable near each fixed mold position, and a laser emitter and a laser receiver are fixedly installed on both sides of the inner wall of the U-shaped fixing frame, respectively.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, by setting up an injection molding machine, a turntable, a U-shaped moving frame, a hydraulic cylinder, a connecting frame, a moving mold, and a fixed mold, achieves the simultaneous injection of molten plastic of the first and second colors into two sets of molds during two-color injection molding, while the third mold opens and removes the part simultaneously. This ensures that both injection molding machines are always in working condition, saves time wasted on mold opening and part removal, and improves injection molding efficiency. The two injection molding machines extrude two different colors of molten plastic respectively. The three moving molds and three fixed molds correspond one-to-one and form three sets of molds. The turntable rotates to allow the three sets of molds to circulate and change positions. The two injection molding machines simultaneously inject different colors of molten plastic into the two sets of molds, while the other set of molds completes the mold opening and part removal.

[0013] 2. This utility model achieves the effect of improving the stability of the turntable during injection molding and mold opening by setting up a U-shaped fixing frame, a fixing cylinder and a friction block. When the injection molding machine injects molten plastic into the fixed mold and the moving mold, and when the mold is opened and the part is removed, the two fixing cylinders drive the two friction blocks to clamp and fix the two sides of the turntable, thereby improving the stability of the turntable.

[0014] 3. This utility model achieves precise positioning of the turntable's rotation by setting up a laser emitter, a laser receiver, and a blocking strip, so as to ensure precise alignment between the injection nozzle on the injection molding machine and the injection port on the moving mold. When the turntable rotates, when the blocking strip is between the laser emitter and the laser receiver, it obstructs the laser receiver from receiving the laser, thereby determining that the moving mold and the fixed mold have rotated into position, so as to ensure precise alignment between the injection nozzle on the injection molding machine and the injection port on the moving mold. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This utility model Figure 1 A magnified structural diagram of A in the middle;

[0017] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 4 This utility model Figure 3 A magnified structural diagram of B in the diagram.

[0019] Reference numerals in the attached diagram: 1. Base; 2. Injection molding machine; 3. Moving mold; 4. Fixed mold; 5. Turntable; 6. Connecting frame; 7. Hydraulic cylinder; 8. Moving cylinder; 9. U-shaped moving frame; 10. Slide groove; 11. Slider; 12. Rotating motor; 13. U-shaped fixed frame; 14. Fixed cylinder; 15. Friction block; 16. Laser receiver; 17. Shielding strip; 18. Laser emitter. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-3As shown, the present invention proposes a two-color injection molding equipment, including a base 1, an injection molding machine 2, a moving mold 3, and a fixed mold 4. The injection molding machine 2 is symmetrically fixedly installed on one side of the upper surface of the base 1 near the front and rear surfaces. A U-shaped moving frame 9 is slidably installed on the side of the upper surface of the base 1 away from the injection molding machine 2. A turntable 5 is rotatably installed inside the U-shaped moving frame 9 through a rotating shaft. The rotating shaft and the turntable 5 are fixedly connected, and the rotating shaft and the U-shaped moving frame 9 are rotatably connected through a bearing. A rotating motor 12 is fixedly installed on the outside of the U-shaped moving frame 9, and the end of the output shaft of the rotating motor 12 is fixedly connected to the end of the rotating shaft.

[0023] Three fixed molds 4 are fixedly installed in a circular array at equal intervals on the inner side of the turntable 5. Each of the three fixed molds 4 has a moving mold 3 on its inner side. The three fixed molds 4 and the three moving molds 3 correspond one-to-one to form three sets of injection molds. Hydraulic cylinders 7 are fixedly connected to the outer side of the turntable 5 near the three fixed molds 4. The output ends of the three hydraulic cylinders 7 are fixedly connected to the outer surface of the three moving molds 3 through connecting brackets 6, and the connecting brackets 6 penetrate the turntable 5. A sliding groove 10 is provided on the upper surface of the base 1 below the U-shaped moving frame 9. A slider 11 is fixedly installed on the lower surface of the U-shaped moving frame 9, and the slider 11 is located inside the sliding groove 10. A moving cylinder 8 is fixedly installed on the upper surface of the base 1 near the outer side of the U-shaped moving frame 9, and the output end of the moving cylinder 8 is fixedly connected to the outer side of the U-shaped moving frame 9. The moving cylinder 8 drives the U-shaped moving frame 9 to move, so that the injection port on the moving mold 3 can be connected or separated from the injection nozzle on the injection molding machine 2, so as to facilitate the rotation of the turntable 5.

[0024] In use, the two injection molding machines 2 extrude two different colors of molten plastic respectively. The three moving molds 3 and the three fixed molds 4 correspond one-to-one and form three sets of molds. The turntable 5 rotates so that the three sets of molds are rotated in a cycle. The two injection molding machines 2 simultaneously inject different colors of molten plastic into the two sets of molds, while the other set of molds completes the mold opening and part removal.

[0025] Example 2

[0026] like Figure 3 and Figure 4 As shown, the present invention proposes a two-color injection molding equipment. Compared with Embodiment 1, this embodiment further includes a U-shaped fixed frame 13 fixedly installed at the bottom of the inner wall of the U-shaped moving frame 9. Fixed cylinders 14 are symmetrically fixedly installed on both sides of the outer surface of the U-shaped fixed frame 13. Friction blocks 15 are fixedly installed at the output ends of the two fixed cylinders 14, and the two friction blocks 15 are respectively located on both sides of the turntable 5. A shielding strip 17 is fixedly installed on the outer surface of the turntable 5 near each fixed mold 4. A laser emitter 18 and a laser receiver 16 are fixedly installed on both sides of the inner wall of the U-shaped fixed frame 13.

[0027] In this embodiment, when the turntable 5 rotates, when the blocking strip 17 is between the laser emitter 18 and the laser receiver 16, it obstructs the laser receiver 16 from receiving the laser, thereby determining that the mold has rotated into place, so that the injection nozzle on the injection molding machine 2 and the injection port on the moving mold 3 can be precisely aligned. When the injection molding machine 2 injects molten plastic into the mold and when the mold is opened and the part is removed, the two fixed cylinders 14 drive the two friction blocks 15 to clamp and fix the two sides of the turntable 5 to improve the stability of the turntable 5.

[0028] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An injection molding machine for two-color injection molding, comprising a base (1), an injection molding machine (2), a moving mold (3), and a fixed mold (4), characterized in that: An injection molding machine (2) is symmetrically fixedly installed on one side of the upper surface of the base (1) near the front and rear surfaces. A U-shaped moving frame (9) is slidably installed on the side of the upper surface of the base (1) away from the injection molding machine (2). A turntable (5) is rotatably installed inside the U-shaped moving frame (9) via a rotating shaft. Three fixed molds (4) are fixedly installed in a circular array at equal intervals on the inner side of the turntable (5). A moving mold (3) is provided on the inner side of each of the three fixed molds (4). A hydraulic cylinder (7) is fixedly connected to the outer side of the turntable (5) near the three fixed molds (4). The output ends of the three hydraulic cylinders (7) are fixedly connected to the outer surfaces of the three moving molds (3) respectively through a connecting frame (6), and the connecting frame (6) passes through the turntable (5).

2. The injection molding equipment for two-color injection molding according to claim 1, characterized in that: The upper surface of the base (1) is provided with a groove (10) located below the U-shaped moving frame (9), and a slider (11) is fixedly installed on the lower surface of the U-shaped moving frame (9), and the slider (11) is located inside the groove (10).

3. The injection molding equipment for two-color injection molding according to claim 2, characterized in that: A moving cylinder (8) is fixedly installed on the upper surface of the base (1) near the outer side of the U-shaped moving frame (9), and the output end of the moving cylinder (8) is fixedly connected to the outer side of the U-shaped moving frame (9).

4. The injection molding equipment for two-color injection molding according to claim 1, characterized in that: A rotating motor (12) is fixedly installed on the outside of the U-shaped moving frame (9), and the output shaft end of the rotating motor (12) is fixedly connected to the rotating shaft end.

5. The injection molding equipment for two-color injection molding according to claim 1, characterized in that: A U-shaped fixed frame (13) is fixedly installed at the bottom of the inner wall of the U-shaped moving frame (9). Fixed cylinders (14) are symmetrically fixedly installed on both sides of the outer surface of the U-shaped fixed frame (13). Friction blocks (15) are fixedly installed at the output ends of the two fixed cylinders (14), and the two friction blocks (15) are located on both sides of the turntable (5).

6. The injection molding equipment for two-color injection molding according to claim 5, characterized in that: A shielding strip (17) is fixedly installed on the outer surface of the turntable (5) near each fixed mold (4), and a laser emitter (18) and a laser receiver (16) are fixedly installed on both sides of the inner wall of the U-shaped fixing frame (13).

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