Double-color plastic mold

Abstract

The utility model discloses a double-color plastic mould, which relates to the technical field of double-color moulds and comprises a turntable, a movable mould and a fixed mould, a lower mould plate is fixed in the movable mould, an upper mould plate is fixed in the fixed mould, the lower mould plate and the upper mould plate are correspondingly matched with each other, a mould core is fixed in the middle of the lower mould plate, and a placing groove is arranged at the lower end of the lower mould plate; the utility model discloses a double-color plastic mold. Specifically, the cooling mechanism adopts a mode of combining a water cooling pipe and an air cooling pipe, and is provided with a shunt pipe and a nitrogen nozzle, so that the mold core can be quickly and uniformly cooled, and the molding cycle of a product is effectively shortened; in addition, the cooling mechanism is connected with the lower die plate through a fixing screw, disassembly and maintenance are convenient, and cleanness of the cooling pipeline and long-term stability of the cooling efficiency are guaranteed. The whole structural design is reasonable, the production efficiency is improved, the maintenance cost is reduced, and remarkable economic benefits and application values are achieved.

Description

Technical Field

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

[0002] Two-color plastic molds are a widely used technology in the production of plastic products, especially in products that require two-color or multi-color effects. Traditional two-color molds are made by using two sets of molds or two cavities of one mold on the same injection molding machine to inject plastics of different colors or materials in two separate injections, ultimately forming two-color products.

[0003] However, as the market demands for the appearance and function of plastic products continue to increase, traditional two-color molds have gradually revealed some shortcomings in terms of cooling efficiency, molding speed, and ease of maintenance. The injection time of the first and second colors in the two sets of molds is determined by the molding speed. When the injection volume of the second color and the first color are different, the one with a smaller injection volume has to wait for the one with a larger injection volume, which leads to wasted time and affects the efficiency of finished products. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a two-color plastic mold that solves the problem of low cooling efficiency in finished two-color mold products. In addition, the cooling mechanism is placed inside the lower mold plate, which allows for easy cleaning and maintenance of cooling efficiency after the fixing plate is removed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-color plastic mold, comprising a turntable, a moving mold, and a fixed mold. A lower template is fixed inside the moving mold, and an upper template is fixed inside the fixed mold. The lower template and the upper template are matched and correspond to each other. A mold core is fixed in the middle of the lower template. A placement groove is provided at the lower end of the lower template. The placement groove is connected to the lower end of the mold core. A cooling mechanism is provided inside the placement groove. The cooling mechanism is positioned corresponding to the lower end of the mold core and is shaped to correspond to the mold core.

[0006] Furthermore, the cooling mechanism includes a water-cooled pipe and an air-cooled pipe, which are respectively arranged inside the lower end of the mold core to accelerate the cooling of the mold core.

[0007] Furthermore, the cooling mechanism also includes a distribution pipe, which is fixed to the outside of the water cooling pipe and connected to it, and the distribution pipe is located inside the lower end of the mold core, corresponding to the shape of the mold core.

[0008] Furthermore, a nozzle is fixed to the upper end of the air-cooling pipe, nitrogen is filled inside the air-cooling pipe, and the nitrogen is sprayed out through the nozzle. The nozzle is set inside the lower end of the mold core to further improve the cooling speed of the mold core.

[0009] Furthermore: a fixing plate is provided at the lower end of the lower template, and a clearance groove is provided at the upper edge of the lower template. A fixing screw is provided through the clearance groove. The fixing screw passes through the lower template and is threadedly connected to the fixing plate. This is used to remove the fixing screw after a period of use, disassemble the entire cooling mechanism for internal cleaning, and maintain cooling efficiency.

[0010] Furthermore, the distance between the water-cooling pipe and the air-cooling pipe and the bottom contour of the mold core is set at 3mm-5mm to avoid stress concentration.

[0011] This invention provides a two-color plastic mold. Compared with the prior art, it has the following advantages:

[0012] This two-color plastic mold features a cooling mechanism that combines water-cooled and air-cooled pipes, equipped with a distribution pipe and nitrogen nozzles. This allows for rapid and uniform cooling of the mold core, effectively shortening the product molding cycle. Furthermore, the cooling mechanism is connected to the lower mold plate via a fixing screw, facilitating disassembly and maintenance and ensuring the cleanliness of the cooling pipes and the long-term stability of cooling efficiency. The overall structural design is reasonable, not only improving production efficiency but also reducing maintenance costs, resulting in significant economic benefits and application value. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the unfolded upper and lower templates of this utility model;

[0015] Figure 3 This is a schematic diagram of the unfolded structure of the lower template and fixing plate of this utility model;

[0016] Figure 4 This is a schematic diagram of the cooling mechanism of this utility model;

[0017] Figure 5 This is a schematic diagram of the cooling mechanism of this utility model;

[0018] Figure 6 This is a structural schematic diagram of a partial cross-section of the lower template and fixing plate of this utility model.

[0019] In the diagram: 1. Turntable; 2. Fixed mold; 3. Moving mold; 4. Upper mold plate; 5. Lower mold plate; 6. Mold core; 7. Fixing plate; 8. Relief groove; 9. Fixing screw; 10. Placement groove; 11. Water cooling pipe; 12. Diverter pipe; 13. Air cooling pipe; 14. Nozzle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-6 This utility model provides a technical solution: a two-color plastic mold; specifically, it consists of a turntable 1, a movable mold 3 fixed at the upper end of the turntable 1, and a fixed mold 2 corresponding to the upper end of the movable mold 3. The movable mold 3 rotates to correspond with the fixed mold 2 for two-color injection molding, which is a known prior art. A lower template 5 is fixed inside the movable mold 3, and an upper template 4 is fixed inside the fixed mold 2. The lower template 5 and the upper template 4 correspond to each other. A mold core 6 is fixed in the middle of the lower template 5, and a placement groove 10 is provided at the lower end of the lower template 5 for placing... The groove 10 is connected to the lower end of the mold core 6. A cooling mechanism is provided in the groove 10. The cooling mechanism corresponds to the lower end of the mold core 6 and is set according to the shape of the mold core 6. The cooling mechanism specifically includes a water cooling pipe 11 and an air cooling pipe 13. The water cooling pipe 11 and the air cooling pipe 13 accelerate the cooling of the lower end of the mold core 6, thereby increasing the speed of product completion. The water cooling pipe 11 and the air cooling pipe 13 are independently controlled by an external control system to achieve precise control of the cooling speed of the mold core 6.

[0022] The cooling mechanism also includes a distribution pipe 12, which is fixed to the outside of the water cooling pipe 11 and connected to it. The distribution pipe 12 is located inside the lower end of the mold core 6 and is configured to correspond to the shape of the mold core 6. A nozzle 14 is fixed at the upper end of the air cooling pipe 13. Nitrogen gas is filled into the air cooling pipe 13 and sprayed out through the nozzle 14. The nozzle 14 corresponds to the lower end of the mold core 6, thereby further improving the cooling speed of the mold core 6 and improving the rapid molding of the items on the upper end of the mold core 6.

[0023] A fixing plate 7 is provided at the lower end of the lower template 5, and a clearance groove 8 is provided at the upper edge of the lower template 5. A fixing screw 9 is inserted in the clearance groove 8. The fixing screw 9 passes through the lower template 5 and is threadedly connected to the fixing plate 7. After a period of use, the fixing screw 9 is removed, and the internal cooling mechanism is completely disassembled for internal cleaning, thus maintaining the cooling efficiency of the cooling mechanism.

[0024] The water-cooling pipe 11 and the air-cooling pipe 13 are set 3mm-5mm away from the bottom contour of the lower end of the mold core 6 to avoid stress concentration.

Claims

1. A two-color plastic mold comprising a rotary table (1), a movable mold (3), and a fixed mold (2), characterized by: The movable die (3) is fixed with a lower die plate (5), the fixed die (2) is fixed with an upper die plate (4), the lower die plate (5) and the upper die plate (4) correspond to each other and match, the middle of the lower die plate (5) is fixed with a mold core (6), the lower end of the lower die plate (5) is provided with a placing groove (10), the placing groove (10) is in communication with the lower end of the mold core (6), the placing groove (10) is provided with a cooling mechanism, the cooling mechanism is arranged in the lower end of the mold core (6), and the cooling mechanism is arranged in the shape of the mold core (6).

2. The two-color plastic mold according to claim 1, wherein: The cooling mechanism comprises a water cooling pipe (11) and a gas cooling pipe (13), the water cooling pipe (11) and the gas cooling pipe (13) are arranged in the lower end of the mold core (6) respectively, and are used for accelerating the cooling of the mold core (6).

3. The two-color plastic mold according to claim 2, wherein: The cooling mechanism further comprises a shunt pipe (12), the shunt pipe (12) is fixed outside the water cooling pipe (11) and is in communication with the water cooling pipe (11), and the shunt pipe (12) is arranged in the lower end of the mold core (6) and is arranged in the shape of the mold core (6).

4. The two-color plastic mold according to claim 2, wherein: The upper end of the gas cooling pipe (13) is fixed with a spray head (14), the gas cooling pipe (13) is filled with nitrogen, the nitrogen is sprayed out through the spray head (14), and the spray head (14) is arranged in the lower end of the mold core (6) and is used for further improving the cooling speed of the mold core (6).

5. The two-color plastic mold according to claim 1, wherein: The lower end of the lower die plate (5) is provided with a fixed plate (7), the upper end edge of the lower die plate (5) is provided with a recess (8), the fixed screw rod (9) is arranged on the recess (8), the fixed screw rod (9) is screwed with the fixed plate (7) through the lower die plate (5), the fixed screw rod (9) is disassembled after stage use, the cooling mechanism is disassembled as a whole, the pipe is cleaned, and the cooling efficiency is maintained.

6. The two-color plastic mold according to claim 2, wherein: The distance between the water cooling pipe (11) and the gas cooling pipe (13) and the bottom contour of the lower end of the mold core (6) is 3mm-5mm, so as to avoid stress concentration.

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