Two-color injection molding machine for keyboard molding

Abstract

The utility model discloses a two -color injection molding machine for keyboard forming, including two side plates, fixed mould and movable mould, the fixed mould is fixed in one side of one side plate through bolt, one side of this side plate is fixedly connected with the cooling fan, one side of fixed mould is fixedly connected with two male die, and the cooling coil is inlayed in fixed mould, and the both ends of cooling coil are out of fixed mould, one side of movable mould is equipped with two female die, and the both sides of movable mould are equipped with the perforation between the penetration. The utility model discloses through the pump body and injects the coolant from the one end of cooling coil into cooling coil, then, the temperature transfer of coolant gives the material in female die, to make it cooling forming, simultaneously, through the cooling fan and blow to the perforation, to give the material transfer to movable mould heat, and further to the material heat dissipation cooling of female die, improve cooling efficiency, to save injection time.

Description

Technical Field

[0001] This utility model relates to the field of two-color injection molding machine technology, and in particular to a two-color injection molding machine for keyboard molding. Background Technology

[0002] Two-color injection molding refers to the molding process of injecting two different materials into the same mold, thereby creating parts with two colors. It is often used for the injection molding of keyboard keys.

[0003] Currently, existing two-color injection molding machines require rapid cooling after the injection of the first material because they need to inject two different materials. However, the existing cooling effect is poor, and the injection time for the second material is relatively long, which affects the material feeding efficiency and production quality. Therefore, in order to improve the material feeding efficiency and production quality of two-color injection molding machines, and to promote technological progress in the industry and enhance core technological competitiveness, this application proposes a new implementation scheme that differs from the structure and application method of existing two-color injection molding machines. Utility Model Content

[0004] The purpose of this invention is to solve the problems of poor cooling effect and long injection waiting time for the second material in existing two-color injection molding machines, which affect the efficiency of material feeding and the quality of production. Therefore, a two-color injection molding machine for keyboard molding is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A two-color injection molding machine for keyboard molding includes two side plates, a fixed mold, and a movable mold. The fixed mold is bolted to one side of one of the side plates. A cooling fan is fixedly connected to one side of this side plate. Two punches are fixedly connected to one side of the fixed mold. A cooling coil is embedded in the fixed mold, with both ends of the cooling coil protruding from the fixed mold. Two concave molds are provided on one side of the movable mold. A through hole is provided between the two sides of the movable mold, located on one side of the concave mold. An electric push rod is fixedly connected to one side of the other side plate. A mounting bracket is fixedly connected to one end of the electric push rod. A sliding frame is fixedly connected to one side of the mounting bracket. A motor is fixedly connected to the outer wall of one side of the sliding frame. The output end of the motor is bolted to one side of the movable mold. Multiple guide rods are fixedly connected between the two side plates, and the sliding frame is slidably sleeved with the guide rods.

[0007] Furthermore, a plurality of positioning pins are fixedly connected to one side of the fixed mold, and a plurality of positioning holes are provided on one side of the movable mold, with the positioning pins inserted into the positioning holes.

[0008] Furthermore, a protective cover is fixedly connected between the two side plates, and the protective cover covers the outside of the fixed mold and the movable mold.

[0009] Furthermore, two ejector pins are slidably inserted into one side of the movable mold. One end of the ejector pin is located inside the cavity mold, and a spring is sleeved on the outer wall of the ejector pin. An ejector block is attached to the other end of the ejector pin.

[0010] Furthermore, a top block is fixedly connected to one inner wall of the protective cover, and the top block can contact one of the rubber heads.

[0011] Furthermore, an observation window is fitted into one side of the protective cover, and a discharge port is provided at the bottom of the protective cover.

[0012] Furthermore, one of the side plates is fixedly connected to two mounting brackets on one side, and an injection tube is inserted into one side of the mounting bracket, with one end of the injection tube communicating with the injection port of the fixed mold.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The coolant is injected into the cooling coil from one end of the pump body. Then, the temperature of the coolant is transferred to the material in the cavity, thereby cooling and molding it. At the same time, the heat is blown into the perforation by the cooling fan, thereby removing the heat transferred from the material to the moving mold, further cooling the material in the cavity, improving cooling efficiency, and thus saving injection time.

[0015] 2. The mounting frame moves under the drive of the first electric push rod, which in turn causes the sliding frame to move along the guide rod, thereby driving the movable mold to move, thus realizing the opening and closing of the movable mold and the fixed mold, which is convenient and quick.

[0016] 3. The retraction of the electric push rod drives the rubber head to move outward, and the ejector block will squeeze the rubber head, thereby causing the ejector pin to move inward, which in turn pushes the finished product to separate from the cavity mold, thus realizing the demolding of the finished product, saving time and effort. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a two-color injection molding machine for keyboard molding proposed in this utility model;

[0018] Figure 2 This is a bottom view of the structure of a two-color injection molding machine for keyboard molding proposed in this utility model;

[0019] Figure 3 This is a partial three-dimensional structural diagram of a two-color injection molding machine for keyboard molding proposed in this utility model;

[0020] Figure 4 This is a partial cross-sectional view of a two-color injection molding machine for keyboard molding proposed in this utility model;

[0021] Figure 5This is a partially exploded structural diagram of a two-color injection molding machine for keyboard molding proposed in this utility model;

[0022] Figure 6 This is a cross-sectional view of the structural fixing mold of a two-color injection molding machine for keyboard molding proposed in this utility model.

[0023] In the diagram: 1. Side plate; 2. Fixed mold; 201. Punch; 202. Positioning pin; 203. Cooling coil; 3. Movable mold; 301. Die; 302. Positioning hole; 303. Through hole; 4. Guide rod; 5. Sliding frame; 6. Mounting bracket; 7. Motor; 8. Electric push rod; 9. Ejector pin; 10. Spring; 11. Rubber head; 12. Ejector block; 13. Cooling fan; 14. Protective cover; 15. Observation window; 16. Discharge port; 17. Injection tube; 18. Mounting bracket. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1-6 A two-color injection molding machine for keyboard molding includes two side plates 1, a fixed mold 2, a movable mold 3 and a control panel. The fixed mold 2 is fixed to one side of one of the side plates 1 by bolts. A cooling fan 13 is fixed to one side of this side plate 1 by bolts. The cooling fan 13 is model AC-12038 and the distance between it and the through hole is 50mm to ensure that the airflow passes evenly through the cavity area.

[0026] Two punches 201 are integrally formed on one side of the fixed mold 2. A cooling coil 203 is embedded in the fixed mold 2. The cooling coil 203 adopts a copper tube structure and both ends of the cooling coil 203 protrude out of the fixed mold 2.

[0027] Two concave molds 301 are provided on one side of the movable mold 3. External coolant is injected into the cooling coil 203 from one end by an external variable frequency pump and then flows out from the other end to form a circulation. During the process, the temperature of the coolant is transferred to the material in the concave mold 301, thereby cooling and shaping it.

[0028] A through hole 303 is provided between the two sides of the movable mold 3. The through hole 303 is located on one side of the cavity mold 301. When the movable mold 3 and the fixed mold 2 are closed, the heat dissipation fan 13 is aligned with the through hole 303. The heat dissipation fan 13 blows air into the through hole 303, thereby carrying away the heat transferred from the material to the movable mold 3, and further cooling the material in the cavity mold 301.

[0029] An electric push rod 8 is bolted to one side of another side plate 1. A mounting bracket 6 is bolted to one end of the electric push rod 8. A sliding bracket 5 is bolted to one side of the mounting bracket 6. A motor 7 is bolted to the outer wall of one side of the sliding bracket 5. The output end of the motor 7 is bolted to one side of the movable mold 3. Multiple guide rods 4 are welded between the two side plates 1. The sliding bracket 5 is slidably connected to the guide rods 4. The mounting bracket 6 moves under the drive of the first electric push rod 8, thereby causing the sliding bracket 5 to move along the guide rods 4, which in turn drives the movable mold 3 to move, thus realizing the opening and closing of the movable mold 3 and the fixed mold 2.

[0030] A protective cover 14 is fixed between the two side plates 1 by bolts. The protective cover 14 covers the outside of the fixed mold 2 and the movable mold 3, thereby protecting the fixed mold 2 and the movable mold 3.

[0031] The fixed mold 2 has multiple positioning posts 202 integrally formed on one side, and the movable mold 3 has multiple positioning holes 302 on one side. The positioning posts 202 are inserted into the positioning holes 302, which facilitates the alignment and closure of the movable mold 3 and the fixed mold 2.

[0032] Two ejector pins 9 are slidably inserted into one side of the movable mold 3. One end of the ejector pin 9 is located inside the cavity mold 301. The gap between the ejector pin 9 and the inner wall of the cavity mold 301 is 0.1mm. A spring 10 is sleeved on the outer wall of the ejector pin 9. The elastic coefficient of the spring 10 is 30-60N / mm to ensure uniform demolding force.

[0033] The other end of the ejector pin 9 is attached to the ejector block 12, which facilitates the reset of the ejector pin 9 under the elastic action of the spring 10. One end of the spring 10 is fixedly connected to the ejector block 12, and the other end of the spring 10 is fixedly connected to the movable mold 3.

[0034] A top block 12 is fixed to one side of the inner wall of the protective cover 14 by bolts. The top block 12 can contact one of the rubber heads 11. The rubber head 11 is moved outward by the contraction of the electric push rod 8. The top block 12 will squeeze the rubber head 11, thereby causing the ejector pin 9 to move inward, and thus pushing the finished product to separate from the cavity mold 301, thereby realizing the demolding of the finished product.

[0035] An observation window 15 is fitted into one side of the protective cover 14, and a discharge port 16 is provided at the bottom of the protective cover 14. The finished product after molding is discharged from the discharge port 16.

[0036] One of the side plates 1 has two mounting brackets 18 fixed to one side by bolts. An injection tube 17 is inserted into one side of the mounting bracket 18. One end of the injection tube 17 is connected to the injection port of the fixed mold 2 so that the material can be injected from the injection tube 17 into the cavity mold 301.

[0037] The control panel is connected to the motor 7 and the electric push rod 8 via wires.

[0038] The working principle of this embodiment is as follows: When in use, the electric push rod 8 is activated. Under the tension of the first electric push rod 8, the mounting bracket 6 is moved, thereby causing the sliding bracket 5 to move along the guide rod 4, which in turn drives the movable mold 3 to move towards the fixed mold 2 until the positioning pin 202 is inserted into the positioning hole 302. Thus, the movable mold 3 and the fixed mold 2 are closed together. Then, the material is injected into the aligned cavity mold 301 from one of the injection tubes 17.

[0039] Then, the coolant is injected into the cooling coil 203 from one end of the pump body. The temperature of the coolant is then transferred to the material in the cavity mold 301, thereby cooling and molding it. The heated coolant is discharged from the other end of the cooling coil 203. The coolant is then cooled down by the cooling equipment and returned to the collection tank for continued use. At the same time, the heat dissipation fan 13 blows air into the perforation 303, thereby removing the heat transferred from the material to the movable mold 3, and further cooling the material in the cavity mold 301 until molding is completed, thus completing the first step of injection molding.

[0040] After molding, the active mold is retracted by the retraction of the electric push rod 8. Then, the motor 7 is started, and the active mold 3 is rotated 180 degrees under the drive of the motor 7, so that the concave mold 301 containing the first molding part is aligned with another convex mold 201. Then, the active mold 3 is closed with the fixed mold 2 by the stretching of the electric push rod 8. At this time, the top block 12 contacts one of the rubber heads 11.

[0041] Then, another color material is injected into the interior of the first molded part through another injection tube 17, and then the part is cooled down by the coolant in the cooling coil 203 and the air blower 13, and waits for molding to complete the second injection molding step.

[0042] Next, the movable mold 3 is retracted by the retraction of the electric push rod 8, which drives the rubber head 11 to move outward. During this process, the top block 12 squeezes the rubber head 11, which causes the ejector pin 9 to move inward, thereby pushing the finished product to separate from the cavity mold 301, thus realizing the demolding of the finished product.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A two-color injection molding machine for molding a keyboard, comprising two side plates (1), a fixed mold (2), and a movable mold (3), characterized in that, The fixed mold (2) is fixed to one side of one of the side plates (1) by bolts. A cooling fan (13) is fixedly connected to one side of this side plate (1). Two punches (201) are fixedly connected to one side of the fixed mold (2). A cooling coil (203) is embedded in the fixed mold (2). Both ends of the cooling coil (203) protrude from the fixed mold (2). Two concave molds (301) are provided on one side of the movable mold (3). A through hole (303) is provided between the two sides of the movable mold (3). The through hole (303) is located at... On one side of the concave mold (301), an electric push rod (8) is fixedly connected to one side of another side plate (1). One end of the electric push rod (8) is fixedly connected to a mounting bracket (6). One side of the mounting bracket (6) is fixedly connected to a sliding bracket (5). One side of the outer wall of the sliding bracket (5) is fixedly connected to a motor (7). The output end of the motor (7) is fixed to one side of the movable mold (3) by bolts. Multiple guide rods (4) are fixedly connected between the two side plates (1). The sliding bracket (5) and the guide rods (4) are slidably sleeved together.

2. The two-color injection molding machine for molding a keyboard according to claim 1, wherein The fixed mold (2) has multiple positioning pins (202) fixedly connected to one side, and the movable mold (3) has multiple positioning holes (302) on one side, with the positioning pins (202) inserted into the positioning holes (302).

3. The two-color injection molding machine for keyboard molding according to claim 1, wherein A protective cover (14) is fixedly connected between the two side plates (1), and the protective cover (14) covers the outside of the fixed mold (2) and the movable mold (3).

4. The two-color injection molding machine for molding a keyboard according to claim 3, wherein Two ejector pins (9) are slidably inserted into one side of the movable mold (3). One end of the ejector pin (9) is located inside the cavity mold (301). A spring (10) is sleeved on the outer wall of the ejector pin (9). An ejector block (12) is attached to the other end of the ejector pin (9).

5. The two-color injection molding machine for molding a keyboard according to claim 3, wherein A top block (12) is fixedly connected to one side of the inner wall of the protective cover (14), and the top block (12) can contact one of the rubber heads (11).

6. The two-color injection molding machine for molding a keyboard according to claim 3, wherein An observation window (15) is fitted into one side of the protective cover (14), and a discharge port (16) is provided at the bottom of the protective cover (14).

7. A two-color injection molding machine for keyboard molding according to claim 1, characterized in that, One of the side plates (1) has two mounting brackets (18) fixedly connected to one side. An injection tube (17) is inserted into one side of the mounting bracket (18), and one end of the injection tube (17) is connected to the injection port of the fixed mold (2).

Images