Mixing seat structure of injection molding machine

Abstract

The utility model discloses a mixing seat structure of an injection molding machine, which comprises a mixing seat, and a first runner and a second runner are arranged in the mixing seat; a first mounting surface and a second mounting surface which are adjacent to each other are arranged on the mixing seat, an included angle between the first mounting surface and the second mounting surface is an obtuse angle, a first flange and a second flange are respectively mounted on the first mounting surface and the second mounting surface, and a first switching flow channel butted with the first flow channel is arranged in the first flange; the second flange is internally provided with a second switching flow channel which is in butt joint with the second flow channel, and the sum of the included angle between the first flange and the second flange and the included angle between the first mounting surface and the second mounting surface is 180 degrees; the two flanges can be directly mounted on the two mounting surfaces respectively, a switching seat is not required to be arranged between the flanges and the mixing seat to meet the butt joint of flow channels, the overall size of the mixing seat structure can be reduced, the length of the flow channels in the overall mixing seat structure is reduced, and therefore the ejection pressure loss is small, and higher-precision temperature control is not required.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machines, and in particular to a hybrid seat structure for an injection molding machine. Background Technology

[0002] Traditional two-color injection molding machines are mostly set up as parallel double-injection units on the same horizontal plane. The material injected by the two injection units is collected by a mixer and then enters the mold through the nozzle. The mixer mainly combines the fluids provided by the two injection units to achieve the effect of mixing or sandwiching. Generally, the mixing unit is equipped with two flow channels with a certain angle to connect to the two injection units respectively. One flow channel acts on the side of the mixer, and the other flow channel acts on the rear of the mixer. Generally, the flow channel acting on the side of the mixer is inclined, so that the fluid flowing into the mixer has a force towards the front of the mixer and towards the axis of the mixer, thereby achieving the effect of sandwiching or mixing.

[0003] Using two injection mechanisms results in a large overall footprint. If the two injection mechanisms are arranged in a vertically stacked structure, a height difference will exist between them, leading to a difference in gravitational potential energy. The impact of the two injection mechanisms on the mixer will be affected by the gravitational potential energy. To address this, existing technologies use a support plate to fix the main and auxiliary injection mechanisms together, stacking them to effectively reduce the overall footprint and improve overall compactness. Furthermore, by limiting the slope of the support plate, the injection ends of the main and auxiliary injection mechanisms are brought as close as possible, thereby reducing the height difference between them and thus reducing the difference in their gravitational potential energy.

[0004] When the mixing seat is connected to two injection mechanisms, it is usually connected to the feed pipes of the two injection mechanisms through two injection nozzles (i.e., connecting flanges). In order to allow the fluid of the auxiliary injection mechanism to smoothly connect with the flow channel inside the mixing seat, an adapter is set between the injection nozzle connected to the auxiliary injection mechanism and the mixing seat. The adapter is used for the transfer flow channel. This results in a large overall volume of the mixing seat and injection nozzle structure, a long flow channel length inside the mixing seat structure, a greater injection pressure loss, and a need for more precise temperature control.

[0005] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a mixing seat structure for an injection molding machine. This structure allows two flanges to be directly mounted on two mounting surfaces, eliminating the need for an adapter between the flanges and the mixing seat to meet the connection between the flow channels. This reduces the overall volume of the mixing seat structure and shortens the length of the flow channels within the overall mixing seat structure, thereby reducing injection pressure loss. It also eliminates the need for higher precision temperature control and provides better and more sensitive temperature control.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A mixing seat structure for an injection molding machine includes a mixing seat with a first flow channel and a second flow channel disposed therein. The mixing seat has adjacent first and second mounting surfaces, with an obtuse angle between them. A first flange and a second flange are respectively mounted on the first and second mounting surfaces. The first flange is used to connect to a first feed tube of the injection molding machine, and the second flange is used to connect to a second feed tube of the injection molding machine. A first transition flow channel that connects to the first flow channel is disposed within the first flange, and a second transition flow channel that connects to the second flow channel is disposed within the second flange. The sum of the angle between the first and second flanges and the angle between the first and second mounting surfaces is 180 degrees.

[0009] As a preferred embodiment, the first mounting surface is provided with a plurality of first connection holes, and the end of the first flange near the mixing seat is provided with a plurality of second connection holes, the second connection holes being connected to the first connection holes by a first connector.

[0010] As a preferred embodiment, the end of the first flange furthest from the mixing seat is provided with a plurality of third connection holes for connecting to the first feed tube of the injection molding machine.

[0011] As a preferred embodiment, the second mounting surface is provided with a plurality of fourth connection holes, and the end of the second flange near the mixing seat is provided with a plurality of fifth connection holes, wherein the fifth connection holes are connected to the fourth connection holes by a second connector.

[0012] As a preferred embodiment, the end of the second flange furthest from the mixing seat is provided with a plurality of sixth connection holes for connecting to the second feed tube of the injection molding machine.

[0013] As a preferred embodiment, a first positioning cavity for positioning the check valve ball is provided between the mixing seat and the first flange, and the first flow channel and the first transition flow channel are respectively connected to the two ends of the first positioning cavity.

[0014] As a preferred embodiment, a second positioning cavity for positioning the check valve ball is provided between the mixing seat and the second flange, and the second flow channel and the second transition flow channel are respectively connected to the two ends of the second positioning cavity.

[0015] As a preferred embodiment, the mixing seat is provided with an inlay structure between itself and both the first flange and the second flange.

[0016] As a preferred embodiment, a first conical cavity is provided at the end of the first flange away from the mixing seat. The first conical cavity is used for the screw head in the first material tube of the injection molding machine to extend into. The end of the first transfer channel away from the first flow channel is connected to the first conical cavity. The first conical cavity is gradually reduced in size towards the first transfer channel. The axial length of the first conical cavity is greater than the axial length of the first transfer channel.

[0017] The second flange has a second conical cavity at the end away from the mixing seat. The second conical cavity is used for the screw head in the second material tube of the injection molding machine to extend into. The end of the second transfer channel away from the second flow channel is connected to the second conical cavity. The second conical cavity is set to gradually decrease in size towards the second transfer channel. The axial length of the second conical cavity is greater than the axial length of the second transfer channel.

[0018] As a preferred embodiment, the included angle between the first transition channel and the second transition channel is consistent with the included angle between the first flange and the second flange.

[0019] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly involves setting adjacent first and second mounting surfaces on the mixing seat, making the included angle between the first and second mounting surfaces an obtuse angle. A first flange and a second flange are respectively installed on the first and second mounting surfaces, and the sum of the included angle between the first and second flanges and the included angle between the first and second mounting surfaces is 180 degrees. In this way, the two flanges can be directly installed on the two mounting surfaces, without the need to set an adapter between the flange and the mixing seat to meet the docking of the flow channels. This reduces the overall volume of the mixing seat structure and the length of the flow channels within the overall mixing seat structure, thereby reducing injection pressure loss, eliminating the need for higher precision temperature control, and resulting in better and more sensitive temperature control.

[0020] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this utility model;

[0022] Figure 2 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this utility model from another angle;

[0023] Figure 3 This is a side view of an embodiment of the present utility model;

[0024] Figure 4 This is an exploded view of an embodiment of the present utility model;

[0025] Figure 5 This is another exploded view of an embodiment of the present utility model;

[0026] Figure 6 This is a cross-sectional view of an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 10. Mixed seat 11. First flow channel

[0029] 12. Second flow channel 13. First mounting surface

[0030] 14. Second mounting surface; 15. First connecting hole

[0031] 16. Fourth connecting hole; 17. Seventh connecting hole

[0032] 20. First flange; 21. First transition channel

[0033] 22. Second connecting hole; 23. Third connecting hole

[0034] 24. First conical cavity; 30. Second flange

[0035] 31. Second transition channel; 32. Fifth connecting hole

[0036] 33. Sixth connecting hole; 34. Second conical cavity

[0037] 40. First positioning cavity; 50. Second positioning cavity

[0038] 60. Embedded cavity; 70. Embedded protrusion

[0039] 101. Pipe body 102. First base body

[0040] 103. The second body. Detailed Implementation

[0041] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of the mixing seat structure of the injection molding machine provided in an embodiment of the present invention.

[0042] The mixing seat structure of this injection molding machine includes a mixing seat 10, within which a first flow channel 11 and a second flow channel 12 are provided. The mixing seat 10 has adjacent first mounting surfaces 13 and 14, with an obtuse angle between them. A first flange 20 and a second flange 30 are respectively mounted on the first mounting surfaces 13 and 14. The first flange 20 is used to connect to the first feed pipe of the injection molding machine, and the second flange 30 is used to connect to the second feed pipe of the injection molding machine. The first flange 20 has a first transition flow channel 21 that mates with the first flow channel 11, and the second flange 30 has a second transition flow channel 31 that mates with the second flow channel 12. The included angle between the first and second transition channels 21 and 31 is acute, and preferably less than 30 degrees; the included angle between the first and second flanges 20 and 30 is the same as the included angle between the first flange 20 and 30, the included angle between the first and second flow channels 11 and 12 is acute, and the sum of the included angle between the first and second flanges 20 and 30 and the included angle between the first mounting surface 13 and the second mounting surface 14 is 180 degrees. In this way, the two flanges can be directly installed on the two mounting surfaces without the need to set an adapter between the flange and the mixing seat 10 to meet the docking between the flow channels. This can reduce the overall volume of the mixing seat structure and make the flow channel length within the overall mixing seat structure smaller, thereby reducing the injection pressure loss and eliminating the need for higher precision temperature control, resulting in better and more sensitive temperature control.

[0043] In this embodiment, the second mounting surface 14 is located above the first mounting surface 13, and the second flange 30 is located above the first flange 20; the first flow channel 11 and the first transition flow channel 21 are located on the same horizontal plane, and their axes coincide.

[0044] The first mounting surface 13 is provided with a plurality of first connecting holes 15, and the end of the first flange 20 near the mixing seat 10 is provided with a plurality of second connecting holes 22. The second connecting holes 22 are connected to the first connecting holes 15 by a first connector, which is a screw. In this way, the first flange 20 can be securely installed on the mixing seat 10 through the first connecting holes 15, the second connecting holes 22 and the first connector. In addition, the end of the first flange 20 away from the mixing seat 10 is provided with a plurality of third connecting holes 23 for connecting to the first material pipe of the injection molding machine.

[0045] The second mounting surface 14 is provided with a plurality of fourth connecting holes 16, and the end of the second flange 30 near the mixing seat 10 is provided with a plurality of fifth connecting holes 32. The fifth connecting holes 32 are connected to the fourth connecting holes 16 by a second connector, which is a screw. Thus, the second flange 30 can be securely installed on the mixing seat 10 through the fourth connecting holes 16, the fifth connecting holes 32 and the second connector. Furthermore, the end of the second flange 30 away from the mixing seat 10 is provided with a plurality of sixth connecting holes 33 for connecting to the second feed tube of the injection molding machine.

[0046] A first positioning cavity 40 for positioning a check valve bead is provided between the mixing seat 10 and the first flange 20. The first flow channel 11 and the first transition flow channel 21 are respectively connected to the two ends of the first positioning cavity 40. A second positioning cavity 50 for positioning a check valve bead is provided between the mixing seat 10 and the second flange 30. The second flow channel 12 and the second transition flow channel 31 are respectively connected to the two ends of the second positioning cavity 50. In this way, the purpose of preventing backflow can be achieved by installing check valve beads in the first positioning cavity 40 and the second positioning cavity 50.

[0047] The mixing seat 10 is provided with an inlay structure between itself and the first flange 20 and the second flange 30 respectively to achieve a seal and improve the sealing effect. In this embodiment, the inlay structure includes an embedding cavity 60 provided on the first mounting surface 13 and the second mounting surface 14 of the mixing seat 10 and an embedding protrusion 70 provided on the first flange 20 and the second flange 30. The embedding protrusion 70 is embedded in the corresponding embedding cavity 60. The first positioning cavity 40 is recessed between the embedding cavity 60 on the first mounting surface 13 and the embedding protrusion 70 on the first flange 20. The second positioning cavity 50 is recessed between the embedding cavity 60 on the second mounting surface 14 and the embedding protrusion 70 on the second flange 30.

[0048] The first flange 20 has a first conical cavity 24 at the end away from the mixing seat 10. The first conical cavity 24 is used for the screw head in the first material tube of the injection molding machine to extend into. The first transition channel 21 is connected to the first conical cavity 24 at the end away from the first flow channel 11. The first conical cavity 24 is gradually smaller towards the first transition channel 21. The axial length of the first conical cavity 24 is greater than the axial length of the first transition channel 21. The second flange 30 has a second conical cavity 34 at the end away from the mixing seat 10. The second conical cavity 34 is used for the screw head in the second material tube of the injection molding machine to extend into. The second transition channel 31 is connected to the second conical cavity 34 at the end away from the second flow channel 12. The second conical cavity 34 is gradually smaller towards the second transition channel 31. The axial length of the second conical cavity 34 is greater than the axial length of the second transition channel 31. In this way, the lengths of the first conical cavity 24 and the second conical cavity 34 can be increased, allowing the screw head to extend further in.

[0049] The mixing seat 10 has a cylindrical structure. The adjacent first mounting surface 13 and second mounting surface 14 are both formed on the right end face of the mixing seat 10. The left end face of the mixing seat 10 is provided with a plurality of seventh connecting holes 17 for connecting with the nozzle of the injection molding machine. The first flange 20 and the second flange 30 have the same basic structure. The first flange 20 and the second flange 30 both include a cylindrical tube 101 and a first seat 102 and a second seat 103 integrally connected to the outer peripheral sidewalls of the left and right ends of the tube 101, respectively. The first seat 102 and the second seat 103 are both cylindrical structures. The first seat 102, the tube 101 and the second seat 103 are coaxially arranged. The outer diameter of the first seat 102 and the second seat 103 is larger than the outer diameter of the tube 101, and the outer diameter of the second seat 103 is larger than the outer diameter of the first seat 102. The embedded protrusion 70 is provided on the end face of the first seat 102 facing the mixing seat 10.

[0050] A plurality of second connecting holes 22 are arranged at intervals along the circumferential direction on the first seat 102 of the first flange 20 and penetrate both end faces of the first seat 102 of the first flange 20; a plurality of third connecting holes 23 are arranged at intervals along the circumferential direction on the second seat 103 of the first flange 20 and penetrate both end faces of the second seat 103 of the first flange 20; a plurality of fifth connecting holes 32 are arranged at intervals along the circumferential direction on the first seat 102 of the second flange 30 and penetrate both end faces of the first seat 102 of the second flange 30; a plurality of sixth connecting holes 33 are arranged at intervals along the circumferential direction on the second seat 103 of the second flange 30 and penetrate both end faces of the second seat 103 of the second flange 30.

[0051] In summary, the key design feature of this utility model lies in the fact that it mainly involves setting adjacent first and second mounting surfaces on the mixing seat, making the included angle between the first and second mounting surfaces an obtuse angle. A first flange and a second flange are respectively mounted on the first and second mounting surfaces, and the sum of the included angle between the first and second flanges and the included angle between the first and second mounting surfaces is 180 degrees. In this way, the two flanges can be directly mounted on the two mounting surfaces, eliminating the need for an adapter between the flanges and the mixing seat to meet the connection between the flow channels. This reduces the overall volume of the mixing seat structure and the length of the flow channels within the overall mixing seat structure, thereby reducing injection pressure loss, eliminating the need for higher precision temperature control, and resulting in better and more sensitive temperature control.

[0052] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A mixing head structure of an injection molding machine, comprising a mixing head in which a first runner and a second runner are provided; characterized in that: The mixing seat is provided with adjacent first and second installation surfaces, the included angle between the first and second installation surfaces is obtuse, the first and second installation surfaces are respectively provided with a first and a second flange, the first flange is used for connecting with a first material pipe of an injection molding machine, the second flange is used for connecting with a second material pipe of the injection molding machine, the first flange is provided with a first adapter flow channel which is connected with the first flow channel, the second flange is provided with a second adapter flow channel which is connected with the second flow channel, and the included angle between the first and second flanges is 180 degrees.

2. The mixing head structure of claim 1 wherein: The first installation surface is provided with a plurality of first connecting holes, and the first flange is provided with a plurality of second connecting holes at one end close to the mixing seat, and the second connecting holes are connected with the first connecting holes through first connecting members.

3. The mixing head structure of claim 2 wherein: The first flange is provided with a plurality of third connecting holes at one end away from the mixing seat, and the third connecting holes are used for connecting with the first material pipe of the injection molding machine.

4. The mixing head structure of claim 1 wherein: The second installation surface is provided with a plurality of fourth connecting holes, and the second flange is provided with a plurality of fifth connecting holes at one end close to the mixing seat, and the fifth connecting holes are connected with the fourth connecting holes through second connecting members.

5. The mixing head structure of claim 4 wherein: The second flange is provided with a plurality of sixth connecting holes at one end away from the mixing seat, and the sixth connecting holes are used for connecting with the second material pipe of the injection molding machine.

6. The mixing head structure of claim 1 wherein: The mixing seat and the first flange are provided with a first positioning cavity for positioning a check valve ball, and the first flow channel and the first adapter flow channel are respectively connected to two ends of the first positioning cavity.

7. The mixing head structure of claim 1 wherein: The mixing seat and the second flange are provided with a second positioning cavity for positioning a check valve ball, and the second flow channel and the second adapter flow channel are respectively connected to two ends of the second positioning cavity.

8. The mixing head structure of claim 1 wherein: The mixing seat and the first and second flanges are respectively provided with an inlay structure.

9. The mixing head structure of claim 1 wherein: The first flange is provided with a first tapered cavity at one end away from the mixing seat, the first tapered cavity is used for extending into a screw head in the first material pipe of the injection molding machine, one end of the first adapter flow channel away from the first flow channel is connected to the first tapered cavity, the first tapered cavity is gradually reduced towards the first adapter flow channel, and the axial length of the first tapered cavity is greater than the axial length of the first adapter flow channel. The second flange is provided with a second tapered cavity at one end away from the mixing seat, the second tapered cavity is used for extending into a screw head in the second material pipe of the injection molding machine, one end of the second adapter flow channel away from the second flow channel is connected to the second tapered cavity, the second tapered cavity is gradually reduced towards the second adapter flow channel, and the axial length of the second tapered cavity is greater than the axial length of the second adapter flow channel.

10. The mixing head structure of claim 1 wherein: The included angle between the first and second adapter flow channels is consistent with the included angle between the first and second flanges.

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