Multicolor injection molding device

Abstract

The utility model discloses a multicolor injection molding device which comprises a fixing machine base and a mold assembly, a fixing machine frame is installed at the end, away from the mold assembly, of the fixing machine base, a [-shaped fixing plate is installed on one side of the mold assembly, an injection molding hole is formed in the center of the [-shaped fixing plate, and a transverse sliding groove is formed in the fixing machine frame. A movable sliding plate is slidably connected into the transverse sliding groove, two screw extruders are arranged between the movable sliding plate and the n-shaped fixing plate, extrusion openings of the screw extruders communicate with heating rings, guide sliding grooves are formed in the upper end and the lower end of the n-shaped fixing plate, and an annular plate is installed at one end of each heating ring; the circular ring plate is in sliding connection with the guide sliding groove. The screw extruder has the beneficial effects that a material at the tail end of the screw extruder can be heated, the phenomenon that the material remained at the tail end of the screw extruder is hardened and cannot be extruded is avoided, the influence on the product quality is avoided, an injection-molded part can be quickly formed, the production efficiency is improved, and the phenomenon of material leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic multi-color injection molding, in particular to a multi-color injection molding device. Background Art

[0002] At present, multi-color injection molding refers to the injection of multiple groups of different materials into the same mold, and the most common multi-color injection molding in the prior art is two-color injection molding, which refers to the injection of two different materials into the same set of molds, thereby realizing a molding process in which the molded parts are formed by two materials. Some of the two materials are of different colors, and some are of different hardness and softness, thereby improving the product's aesthetics and assembly performance.

[0003] The utility model with application number CN202220984756.4 discloses a thermoplastic multi-color injection molding device. A switching component and a sealing component are provided, and then the switching component is used to drive two groups of injection nozzles to switch, and the two groups of screw extruders are sealed respectively during the switching process, so that only one group of materials can be injected at a time, and the two groups of materials are prevented from mixing before injection by the action of the two groups of injection nozzles.

[0004] The above-mentioned device drives the two groups of injection nozzles to switch through the switching component. During the rotation of the injection nozzle, the residual material in the injection nozzle is easy to be thrown out, and the material is easy to be thrown onto the equipment. It is not easy to clean the material after cooling. At the same time, the residual material in the injection nozzle hardens after cooling, and the hardened material cannot be squeezed out. If the hardened material enters the mold, it will affect the quality of the product.

[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0006] The utility model aims to solve the above problems and designs a multi-color injection molding device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A multi-color injection molding device includes a fixed machine base and a mold assembly. The mold assembly is installed on one side of the surface of the fixed machine base. A fixed frame is installed at one end of the fixed machine base away from the mold assembly. A U-shaped fixed plate is installed on one side of the mold assembly. An injection hole is provided at the center of the U-shaped fixed plate, and the injection hole is communicated with the mold assembly. A transverse chute is provided on the fixed frame, and a moving slide plate is slidably connected in the transverse chute. There are two screw extruders between the moving slide plate and the U-shaped fixed plate. A feed hopper is communicated with the screw extruder, and the extrusion port of the screw extruder is communicated with a heating coil. One end of the heating coil away from the screw extruder is located inside the U-shaped fixed plate. Guide chutes are provided at the upper and lower ends of the U-shaped fixed plate. One end of the heating coil is installed with a circular ring plate, and the circular ring plate is slidably connected with the guide chute.

[0009] Further, one end of the moving slide plate close to the screw extruder extends out of the transverse chute. A fixed toothed plate is installed at the bottom of the moving slide plate. A driving motor is installed on the fixed machine base, and a driving gear is installed at the output end of the driving motor. The driving gear meshes with the fixed toothed plate.

[0010] Further, a recycling box is provided on the fixed machine base. The recycling box is located below the U-shaped fixed plate and the screw extruder. A cooling pipe is coiled inside the U-shaped fixed plate, and the cooling pipe is communicated with the mold assembly. Both ends of the cooling pipe penetrate and extend out of the U-shaped fixed plate. A liquid inlet hopper is installed on one side of the mold assembly. The liquid inlet end of the cooling pipe is communicated with the liquid inlet hopper, and the end of the cooling pipe is located inside the recycling box.

[0011] Further, semi-circular baffles are installed on both sides inside the U-shaped fixed plate. The distances between the two semi-circular baffles and the injection hole are the same, and the diameters of the semi-circular baffles are the same as those of the heating coil.

[0012] Further, the inner diameter of the heating coil is the same as the diameter of the injection hole, the inner diameter of the circular ring plate is the same as the outer diameter of the heating coil, and the inner ring of the circular ring plate is fixedly connected to the outer ring of the heating coil.

[0013] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0014] By driving the two screw extruders to move positions through the moving slide plate, the heating coils on the screw extruders are aligned with the injection holes, which is convenient for replacing different materials, and different materials will not be mixed. The materials at the end of the screw extruder are heated by the heating coils, avoiding the hardening of the materials remaining at the end of the screw extruder and being unable to be extruded, and avoiding affecting the product quality.

[0015] By pouring the coolant into the cooling pipe, the cooling pipe is coiled inside the U-shaped fixing plate and communicated with the mold assembly, so that the mold can be cooled, and at the same time, the U-shaped fixing plate and the heating coil can be cooled, which can enable the injection molded part to be quickly formed, improving the production efficiency. The coolant flows to the end of the cooling pipe and flows into the recycling box, and the coolant can be recycled to avoid waste of resources;

[0016] The semi-circular baffle plays a role in limiting the screw extruder, so that the heating coil on the screw extruder can be completely aligned with the injection hole, avoiding the phenomenon of material leakage. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural view of a multi-color injection molding device described in the present utility model.

[0018] Figure 2 It is a top view of the present utility model.

[0019] Figure 3 It is an enlarged front view of the U-shaped fixing plate.

[0020] Figure 4 It is an enlarged cross-sectional view of the U-shaped fixing plate.

[0021] Figure 5 It is an enlarged front view of the fixed frame.

[0022] In the figure: 1, fixed base; 2, mold assembly; 3, fixed frame; 4, U-shaped fixing plate; 5, injection hole; 6, horizontal sliding groove; 7, moving slide plate; 8, screw extruder; 9, feed hopper; 10, heating coil; 11, guiding sliding groove; 12, circular ring plate; 13, fixed toothed plate; 14, driving motor; 15, driving gear; 16, recycling box; 17, cooling pipe; 18, liquid inlet hopper; 19, semi-circular baffle. Detailed Embodiments

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, in the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0025] The present utility model provides a multi-color injection molding device as shown in Figure 1-5 Figure 5, which includes a fixed machine base 1 and a mold assembly 2. The mold assembly 2 is installed on one side of the surface of the fixed machine base 1. A fixed frame 3 is installed at one end of the fixed machine base 1 away from the mold assembly 2. A U-shaped fixing plate 4 is installed on one side of the mold assembly 2. An injection hole 5 is provided at the center of the U-shaped fixing plate 4. The injection hole 5 is communicated with the mold assembly 2. A transverse sliding groove 6 is provided on the fixed frame 3. A moving slide plate 7 is slidably connected in the transverse sliding groove 6. There are two screw extruders 8 between the moving slide plate 7 and the U-shaped fixing plate 4. A feed hopper 9 is communicated with the screw extruder 8. The extrusion port of the screw extruder 8 is communicated with a heating coil 10. One end of the heating coil 10 away from the screw extruder 8 is located inside the U-shaped fixing plate 4. Guide sliding grooves 11 are provided at the upper and lower ends of the U-shaped fixing plate 4. A circular ring plate 12 is installed at one end of the heating coil 10. The circular ring plate 12 is slidably connected with the guide sliding groove 11.

[0026] Pour the raw materials into the feed hoppers 9 on the two screw extruders 8 respectively. The screw extruders 8 heat and melt the raw materials. The moving slide plate 7 slides along the transverse sliding groove 6. The moving slide plate 7 drives the two screw extruders 8 to slide. The heating coil 10 on the extrusion port of the screw extruder 8 slides along the U-shaped fixing plate 4. The heating coil 10 drives the circular ring plate 12 to slide along the guide sliding groove 11. The circular ring plate 12 and the guide sliding groove 11 play a guiding role for the screw extruder 8 to prevent the heating coil 10 from falling off from inside the U-shaped fixing plate 4. The two screw extruders 8 move positions. Align the heating coil 10 on one of the screw extruders 8 with the injection hole 5. The screw extruder 8 injects the heated and melted raw materials into the mold assembly 2 through the injection hole 5. When switching materials, move the positions of the two screw extruders 8. Align the heating coil 10 on the other screw extruder 8 with the injection hole 5. The other screw extruder 8 injects the heated and melted raw materials into the mold assembly 2 through the injection hole 5. It is convenient to replace different materials, and different materials will not be mixed. The heating coil 10 heats the materials at the end of the screw extruder 8 to prevent the materials remaining at the end of the screw extruder 8 from hardening and being unable to be extruded, thus avoiding affecting the product quality.

[0027] Refer to the attached drawings of the specification Figure 1 and the appended description Figure 5 , the movable slide plate 7 extends out of the transverse chute 6 near one end of the screw extruder 8. A fixed toothed plate 13 is installed at the bottom of the movable slide plate 7, a driving motor 14 is installed on the fixed base 1, a driving gear 15 is installed at the output end of the driving motor 14, and the driving gear 15 meshes with the fixed toothed plate 13.

[0028] When the driving motor 14 starts to work, the output end of the driving motor 14 drives the driving gear 15 to rotate. The driving gear 15 drives the fixed toothed plate 13 to move by meshing with the fixed toothed plate 13. The fixed toothed plate 13 drives the movable slide plate 7 to slide along the transverse chute 6, and the movable slide plate 7 drives the two screw extruders 8 to move positions.

[0029] Refer to the appended description Figure 1 , the appended description Figure 3 and the appended description Figure 4 , a recycling box 16 is provided on the fixed base 1. The recycling box 16 is located below the U-shaped fixing plate 4 and the screw extruder 8. A cooling pipe 17 is coiled inside the U-shaped fixing plate 4. The cooling pipe 17 is connected to the mold assembly 2. Both ends of the cooling pipe 17 penetrate and extend out of the U-shaped fixing plate 4. A liquid inlet hopper 18 is installed on one side of the mold assembly 2. The liquid inlet end of the cooling pipe 17 is connected to the liquid inlet hopper 18. The end of the cooling pipe 17 is located inside the recycling box 16.

[0030] After the injection molding is completed, the staff can pour the coolant into the liquid inlet hopper 18. The coolant in the liquid inlet hopper 18 enters the cooling pipe 17. The cooling pipe 17 is coiled inside the U-shaped fixing plate 4 and is connected to the mold assembly 2, which can cool the mold. At the same time, it can cool the U-shaped fixing plate 4 and the heating coil 10, enabling the injection molded part to be quickly formed and improving production efficiency. The coolant flows to the end of the cooling pipe 17 and flows into the recycling box 16, where the coolant can be recycled to avoid waste of resources.

[0031] Refer to the appended description Figure 3 , semi-circular baffles 19 are installed on both sides inside the U-shaped fixing plate 4. The distances between the two semi-circular baffles 19 and the injection holes 5 are the same, and the diameters of the semi-circular baffles 19 are the same as those of the heating coils 10.

[0032] When the two screw extruders 8 move positions, when the heating coil 10 on one screw extruder 8 coincides with the injection hole 5, the heating coil 10 on the other screw extruder 8 fits with the semi-circular baffle 19. The semi-circular baffle 19 plays a role in limiting the screw extruder 8, enabling the heating coil 10 on the screw extruder 8 to completely coincide with the injection hole 5 and avoiding the phenomenon of material leakage.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-color injection molding device, comprising a fixed machine base (1) and a mold assembly (2), wherein the mold assembly (2) is mounted on one side of the surface of the fixed machine base (1), and a fixed frame (3) is mounted on one end of the fixed machine base (1) away from the mold assembly (2), characterized in that: One side of the mold assembly (2) is provided with a U-shaped fixing plate (4). An injection hole (5) is provided at the center of the U-shaped fixing plate (4). The injection hole (5) is communicated with the mold assembly (2). A transverse sliding groove (6) is provided on the fixed frame (3). A moving slide plate (7) is slidably connected in the transverse sliding groove (6). Two screw extruders (8) are provided between the moving slide plate (7) and the U-shaped fixing plate (4). A feeding hopper (9) is communicated with the screw extruder (8). The extrusion port of the screw extruder (8) is communicated with a heating coil (10). One end of the heating coil (10) away from the screw extruder (8) is located inside the U-shaped fixing plate (4). Guide sliding grooves (11) are provided at the upper and lower ends of the U-shaped fixing plate (4). One end of the heating coil (10) is provided with an annular plate (12). The annular plate (12) is slidably connected with the guide sliding groove (11).

2. A multi-color injection molding device according to claim 1, characterized in that: One end of the moving slide plate (7) close to the screw extruder (8) extends out of the transverse sliding groove (6). A fixed toothed plate (13) is installed at the bottom of the moving slide plate (7). A driving motor (14) is installed on the fixed machine base (1). A driving gear (15) is installed at the output end of the driving motor (14). The driving gear (15) meshes with the fixed toothed plate (13).

3. A multi-color injection molding device according to claim 1, characterized in that: A recycling box (16) is provided on the fixed machine base (1). The recycling box (16) is located below the U-shaped fixing plate (4) and the screw extruder (8). A cooling pipe (17) is coiled inside the U-shaped fixing plate (4). The cooling pipe (17) is communicated with the mold assembly (2). Both ends of the cooling pipe (17) penetrate and extend out of the U-shaped fixing plate (4). A liquid inlet hopper (18) is installed on one side of the mold assembly (2). The liquid inlet end of the cooling pipe (17) is communicated with the liquid inlet hopper (18). The end of the cooling pipe (17) is located inside the recycling box (16).

4. A multi-color injection molding device according to claim 1, characterized in that: Semicircular baffles (19) are installed on both sides inside the U-shaped fixing plate (4). The distances between the two semicircular baffles (19) and the injection hole (5) are the same. The diameters of the semicircular baffles (19) and the heating coil (10) are the same.

5. A multi-color injection molding device according to claim 1, characterized in that: The inner diameter of the heating coil (10) is the same as the diameter of the injection hole (5). The inner diameter of the annular plate (12) is the same as the outer diameter of the heating coil (10). The inner ring of the annular plate (12) is fixedly connected with the outer ring of the heating coil (10).

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