Drive device for a two-color injection molding head

Abstract

The utility model discloses a kind of driving device for double-color injection head, including cylinder, symmetrically arranged chamber in the cylinder, piston is slidably connected in the chamber, piston rod is connected on the piston, oil port is provided on the cylinder and is communicated with chamber, one end of one piston rod passes out cylinder and forms fixed end for installation, one end of another piston rod passes out cylinder and forms driving end for connection, by the mode of one cylinder combination two end piston rod, three different lengths on adjustment can be combined in the different two ends of piston being driven to chamber, so that it can drive switching of three kinds of feed states of reversing element when being installed on injection head and used, and piston is in the end of chamber in three states, not in the middle position of chamber, with better accuracy and stability, can satisfy the use needs of more occasions, with better applicability.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machines, and in particular to a drive device for a two-color injection head. Background Technology

[0002] An injection molding machine, also known as an injection molding machine or injection machine, is an injection molding equipment that uses plastic molds to make plastic parts from thermoplastic or thermosetting plastics.

[0003] In the current injection molding industry, multiple raw materials are sometimes injected simultaneously, or different raw material feeds need to be switched to achieve different effects. Therefore, it is necessary to switch the opening and closing of the flow channels in the injection head. Usually, this is achieved by driving the reversing element to rotate or move the switching position. However, manual operation is cumbersome. Currently, there are also methods that directly drive the flow channels with hydraulic cylinders. However, these hydraulic cylinders only have two extreme strokes, one short and one long. If the reversing element has three feeding states, it may not be applicable because if the piston stops in the middle area, the accuracy may be low. Further improvements are needed. Utility Model Content

[0004] To further improve applicability, this application provides a drive device for a two-color injection head.

[0005] This application provides a driving device for a two-color injection molding head, which adopts the following technical solution: A driving device for a two-color injection molding head includes a cylinder body with symmetrically arranged chambers inside the cylinder body. A piston is slidably connected to each chamber, and a piston rod is connected to each piston. An oil port communicating with the chamber is provided on the cylinder body. One end of one piston rod extends out of the cylinder body to form a fixed end for installation, and one end of the other piston rod extends out of the cylinder body to form a driving end for connection.

[0006] Optionally, both the fixed end and the driving end are provided with hinges for hinged connection, and the hinges are detachably connected to the end of the piston rod.

[0007] Optionally, the hinge member has a mounting hole, and a hinge ball is connected to the mounting hole by a ball joint. The hinge ball has a through connection hole.

[0008] Optionally, the cylinder body is provided with a cooling pipe, and the cylinder body is provided with an inlet and an outlet communicating with the cooling pipe.

[0009] Optionally, the cylinder body includes a main body and end caps at both ends. The two ends of the cooling pipe are respectively connected to the end caps at both ends. The end caps are provided with cooling channels communicating with the cooling pipes. The inlet and outlet are provided on the end caps and communicate with the cooling channels.

[0010] Optionally, the inlet and outlet are located on the same end cap.

[0011] Optionally, the cooling pipe includes a parallel inlet pipe and a return pipe, wherein the inlet pipe is connected to an inlet and the return pipe is connected to an outlet.

[0012] Optionally, the end cap without the aforementioned inlet and outlet is provided with a connecting channel that connects the inlet pipe and the return pipe.

[0013] Optionally, both ends of the piston rod are provided with threaded sections, and the hinge is threadedly connected to the threaded sections.

[0014] Optionally, a clearance groove for avoiding the threaded section is provided at the end of the cavity.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. By combining a cylinder with piston rods at both ends, three different lengths can be adjusted when the piston is driven to different ends of the chamber. When installed on the injection head, this can drive the switching of the reversing element to switch between three feeding states. In all three states, the piston is at the end of the chamber, not in the middle, which has better accuracy and stability, can meet the needs of more occasions, and has better applicability. 2. The fixed end and the drive end are mounted with a ball joint. The ball joint is used to connect the fixed end and the drive end. This connection method can not only adapt to the circumferential rotation of the reversing element on the injection head, but also to the fine adjustment of the reversing element in the axial direction, which has better applicability and performance. 3. Since the injection head has a high temperature during operation, the cooling pipe design can effectively cool the entire cylinder, preventing the cylinder temperature from becoming too high. The inlet and outlet can achieve circulating cooling medium for better cooling effect. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of an embodiment of this application.

[0017] Figure 2 This is a structural diagram from the bottom view of an embodiment of this application.

[0018] Figure 3 This is a cross-sectional view of an embodiment of this application.

[0019] Figure 4 This is a structural diagram of the hinge component in an embodiment of this application.

[0020] Figure 5 This is a top view of an embodiment of this application.

[0021] Figure 6 yes Figure 5 Sectional view at point AA.

[0022] Figure 7 yes Figure 5 Sectional view at point BB.

[0023] Figure 8 This is a perspective view of the embodiment used in this application.

[0024] Figure 9 This is a cross-sectional view of the first state when used in the embodiments of this application.

[0025] Figure 10 This is a cross-sectional view of the second state when used in the embodiments of this application.

[0026] Figure 11 This is a cross-sectional view in the third state when used in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures: 1. Cylinder block; 2. Chamber; 3. Main body; 4. End cap; 5. Piston; 6. Oil port; 7. Piston rod; 8. Fixed end; 9. Drive end; 10. Injection head; 11. Base; 12. Reversing element; 13. Hinge; 14. Threaded section; 15. Threaded hole; 16. Mounting hole; 17. Hinge ball; 18. Connecting hole; 19. Cooling pipe; 20. Inlet; 21. Outlet; 22. Liquid inlet pipe; 23. Liquid return pipe; 24. Cooling flow channel; 25. Connecting channel; 26. Clearance groove. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0029] A drive device for a two-color injection molding head, such as Figures 1-3As shown, the device includes a cylinder body 1, with symmetrically arranged chambers 2 inside the cylinder body 1. The cylinder body 1 includes a main body 3 and end caps 4 at both ends. The symmetrical chambers 2 are opened on the main body 3, and one end of the chamber 2 is closed by the end cap 4. A piston 5 is axially slidably connected inside the chamber 2. An oil port 6 is opened at the bottom of the cylinder body 1, which communicates with the corresponding chamber 2. Oil is injected into the chambers 2 on different sides of the piston 5 through the oil port 6 to push the piston 5 to move. A piston rod 7 is connected to the piston 5. One end of the piston rod 7 is connected and fixed to the piston 5, and the other end protrudes through the end cap 4 and is located outside the cylinder body 1. One end of the piston rod 7 protrudes through the cylinder body 1 to form a fixed end 8 for installation, and the other end of the piston rod 7 protrudes through the cylinder body 1 to form a drive end 9 for connection. In actual use, the fixed end 8 is connected and installed on the base 11 of the injection head 10, and the drive end 9 is connected and installed on the reversing element 12 on the injection head 10. In this way, the extension and retraction adjustment of the two piston rods 7 ultimately drives the reversing element 12 to switch states to realize the opening and closing of the raw material channel.

[0030] like Figures 3-4 As shown, the end of the piston rod 7 extending out of the cylinder 1 is detachably connected to a hinge member 13 for hinge connection. In this embodiment, the hinge member 13 is detachably connected to the end of the piston rod 7 by a threaded connection. A threaded section 14 is provided at the end of the piston rod 7, and a threaded hole 15 is provided on the hinge member 13 for threaded connection with the threaded section 14. In actual use, the length can be further finely adjusted by rotating the hinge member 13 to improve applicability and practicality.

[0031] like Figure 3 and Figure 4 As shown, a mounting hole 16 is provided in the center of the hinge 13, and a hinge ball 17 is connected to the mounting hole 16 by a ball joint. A through connection hole 18 is provided in the center of the hinge ball 17. In this way, the connection is achieved by means of the connection hole 18 during the actual connection and installation process. The ball joint method allows the drive device to adapt to the rotational changes in the circumferential angle of the commutating element 12, and at the same time, it can also adapt to the displacement in the axial direction to a certain extent. This reduces the restriction of the drive device on the commutating element 12, improves the applicability of this drive device, and can meet the needs of more occasions.

[0032] like Figure 1 , Figures 5-7 As shown, a cooling pipe 19 is provided on the cylinder body 1. The cylinder body 1 is provided with an inlet 20 and an outlet 21 that are connected to the cooling pipe 19. Cooling medium is introduced through the inlet 20, flows through the cylinder body 1 and the cooling pipe 19, and finally exits from the outlet 21, thereby effectively cooling the entire drive device. Since the drive device is used on the injection head 10, the injection head 10 is at a high temperature during use. This can effectively prevent the drive device from overheating.

[0033] like Figure 1 , Figures 5-7As shown, the cooling pipe 19 includes an inlet pipe 22 and a return pipe 23 arranged parallel to each other on the top of the cylinder 1. The inlet 20 and the outlet 21 are located at the bottom of the same end cover 4. A cooling channel 24 communicating with the cooling pipe 19 is provided inside the end cover 4. One end of the inlet pipe 22 is connected to the inlet 20, and the other end is connected to the return pipe 23. One end of the return pipe 23 is connected to the inlet pipe 22, and the other end is connected to the outlet 21. The other end cover 4, which does not have an inlet 20 and an outlet 21, has a connecting channel 25 connecting the inlet pipe 22 and the return pipe 23. In this way, the cooling medium enters from the inlet 20, flows through the cooling channel 24, enters the inlet pipe 22, and flows into the other end cover 4. Then, it flows back to the return pipe 23 through the connecting channel 25 and is finally discharged through the outlet 21. This effectively realizes the flow and circulation of the cooling medium in the cylinder 1, improving the cooling effect. The fact that the inlet 20 and the outlet 21 are located on the same end cover 4 facilitates the unified connection of the pipelines and also facilitates disassembly and assembly operations.

[0034] like Figure 3 As shown, a clearance groove 26 is provided at the end of the chamber 2 to avoid the threaded section 14. In this way, when the piston 5 moves to the end of the chamber 2, the threaded section 14 at the end of the piston rod 7 can enter the clearance groove 26, avoiding the phenomenon that the piston 5 is difficult to move to the end due to the threaded section 14 at the end of the piston rod 7.

[0035] like Figure 8 As shown, this embodiment is specifically installed on the injection head 10 for use. In actual use, the fixed end 8 of this embodiment is hinged to the base 11 of the injection head 10, and the end of the driving end 9 is hinged to the injection head 10 for rotating the reversing element 12 on the feed channel. In this way, by driving the piston 5 in the two chambers 2 to move to different end positions, the reversing element 12 is driven to rotate to three different feeding states, and finally the feeding mode switching of the injection head 10 at different stages is realized.

[0036] like Figure 9 The image shows the first driving state in this embodiment, where the length of the entire driving device is at its shortest. Figure 10 The image shows the second driving state in this embodiment, where the length of the entire driving device is at the middle setting, as shown below. Figure 11The diagram shows the third driving state of this embodiment, where the entire driving device is at its longest. In all driving states, the piston 5 is located at the end of the chamber 2, eliminating the problem of the piston 5 being in the middle of the chamber 2 and difficult to position accurately. This embodiment uses a cylinder 1 combined with piston rods 7 at both ends to create three different length adjustments when the piston 5 is driven to different ends of the chamber 2. When installed on the injection head 10, this allows the reversing element 12 to switch between three feeding states. In all three states, the piston 5 is located at the end of the chamber 2, not in the middle, resulting in better accuracy and stability. This meets the needs of more applications and has better applicability.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A driving device for a two-color injection molding head, characterized in that: Includes a cylinder body (1), in which chambers (2) are symmetrically arranged, and pistons (5) are slidably connected in each chamber (2). Piston rods (7) are connected to each piston (5). Oil ports (6) communicating with chambers (2) are provided on the cylinder body (1). One end of one piston rod (7) protrudes from the cylinder body (1) to form a fixed end (8) for installation, and one end of the other piston rod (7) protrudes from the cylinder body (1) to form a drive end (9) for connection.

2. The driving device for a two-color injection molding head according to claim 1, characterized in that: Both the fixed end (8) and the driving end (9) are provided with hinge members (13) for hinge connection, and the hinge members (13) are detachably connected to the end of the piston rod (7).

3. A driving device for a two-color injection molding head according to claim 2, characterized in that: The hinge (13) has a mounting hole (16), and a hinge ball (17) is connected to the mounting hole (16) by a ball joint. The hinge ball (17) has a through connection hole (18).

4. A driving device for a two-color injection molding head according to claim 1 or 3, characterized in that: The cylinder (1) is provided with a cooling pipe (19), and the cylinder (1) is provided with an inlet (20) and an outlet (21) that communicate with the cooling pipe (19).

5. A driving device for a two-color injection molding head according to claim 4, characterized in that: The cylinder body (1) includes a main body (3) and end caps (4) at both ends. The two ends of the cooling pipe (19) are connected to the end caps (4) at both ends respectively. The end cap (4) is provided with a cooling channel (24) communicating with the cooling pipe (19). The inlet (20) and outlet (21) are provided on the end cap (4) and communicate with the cooling channel (24).

6. A driving device for a two-color injection molding head according to claim 5, characterized in that: The inlet (20) and outlet (21) are located on the same end cap (4).

7. A driving device for a two-color injection molding head according to claim 5 or 6, characterized in that: The cooling pipe (19) includes a liquid inlet pipe (22) and a liquid return pipe (23) arranged in parallel. The liquid inlet pipe (22) is connected to the inlet (20), and the liquid return pipe (23) is connected to the outlet (21).

8. A driving device for a two-color injection molding head according to claim 7, characterized in that: The end cap (4) without the inlet (20) and outlet (21) is provided with a connecting channel (25) that connects the inlet pipe (22) and the return pipe (23).

9. A driving device for a two-color injection molding head according to claim 2, characterized in that: Both ends of the piston rod (7) are provided with threaded sections (14), and the hinge (13) is threadedly connected to the threaded sections (14).

10. A driving device for a two-color injection molding head according to claim 9, characterized in that: An avoidance groove (26) for avoiding the threaded section (14) is provided at the end of the chamber (2).

Images