Color mixing ejection nozzle for injection molding machine

Abstract

The utility model discloses a color mixing ejection nozzle for an injection molding machine, which comprises an ejection nozzle body, a sleeve, an ejection nozzle head and a mixing device, a fluid channel is arranged inside the ejection nozzle body, the sleeve is provided with an accommodating cavity with two open ends, the ejection nozzle head is connected to the left end of the sleeve, the ejection nozzle head is provided with a glue ejection hole and a mixing cavity which are communicated with each other, and the glue ejection hole penetrates through the left end of the ejection nozzle head. The mixing cavity is communicated with the containing cavity, the injection nozzle body is arranged in the containing cavity from right to left, a flow channel is formed between the outer peripheral side wall of the injection nozzle body and the inner peripheral side wall of the containing cavity, and the flow channel is communicated with the mixing cavity; the left end of the ejection nozzle body extends into the mixing cavity, the mixing device is positioned in the left end of the ejection nozzle body, a feeding channel and a discharging channel which are communicated with each other are arranged in the mixing device, the feeding end of the feeding channel is communicated with the fluid channel, and the discharging end of the discharging channel penetrates through the left end of the mixing device and is communicated with the mixing cavity; the liquid mixing path can be shortened, the color density can be effectively improved, and the blending effect can be effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of injection nozzles, and in particular to a color mixing injection nozzle for injection molding machines. Background Technology

[0002] Injection molding machines have the ability to mold complex, precise, or dense plastic products with metal inserts in one step. They heat and plasticize a certain amount of hot melt plastic in the barrel, and then inject the molten plastic into the mold cavity through the nozzle under certain pressure and speed. They are widely used in various fields such as electromechanical, automotive, transportation, building materials, packaging, agriculture, education and health, and people's daily life.

[0003] Existing injection molding machine nozzles include a nozzle body with an internal fluid channel running through both ends of the nozzle body, particularly the end closest to the injection molding machine barrel. The end of the nozzle body furthest from the barrel has a filling hole connected to the fluid channel. When using this existing nozzle, after melting two or more types of plastic granules, the different molten plastics can only be directly mixed together through the fluid channel before being injected into the mold through the filling hole. This prevents proper flow distribution and results in a longer mixing path, affecting color density and hindering effective blending control.

[0004] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a color mixing injection nozzle for injection molding machines, which can shorten the fluid mixing path, effectively improve the color density, and effectively control the blending effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A color mixing nozzle for an injection molding machine includes a nozzle body with a fluid channel inside the nozzle body extending through both ends of the nozzle body; it also includes a sleeve, a nozzle head, and a mixer.

[0008] The sleeve has a receiving cavity with openings at both ends. The nozzle head is connected to the left end of the sleeve. The nozzle head has a connected injection hole and a mixing cavity. The injection hole passes through the left end of the nozzle head. The mixing cavity is connected to the receiving cavity. The nozzle body is inserted into the receiving cavity from right to left. A flow channel is formed between the outer peripheral sidewall of the nozzle body and the inner peripheral sidewall of the receiving cavity. The flow channel is connected to the mixing cavity.

[0009] The left end of the nozzle body extends into the mixing chamber. The mixer is positioned inside the left end of the nozzle body. The left end of the mixer extends outside the left end of the nozzle body. The mixer has a connected feed channel and a discharge channel. The feed end of the feed channel is connected to the fluid channel. The discharge end of the discharge channel extends through to the left end of the mixer and is connected to the mixing chamber.

[0010] As a preferred embodiment, the left end of the sleeve is recessed with a mounting cavity extending along the axial direction of the sleeve, the mounting cavity being connected to the receiving cavity, the right end of the nozzle head having an annular mounting portion, the annular mounting portion being installed in the mounting cavity, and the right end opening of the mixing cavity extending through to the right end face of the annular mounting portion.

[0011] As a preferred embodiment, the right end of the ejector nozzle body extends beyond the right end of the sleeve, and the right end of the ejector nozzle body has a connecting portion.

[0012] As a preferred embodiment, a plurality of protruding ribs are provided on the outer peripheral sidewall of the ejection nozzle body. The plurality of protruding ribs are arranged sequentially at intervals along the circumferential direction of the ejection nozzle body. The protruding ribs extend along the axial direction of the ejection nozzle body. The side of the protruding ribs away from the ejection nozzle body is constrained by the inner peripheral sidewall of the receiving cavity.

[0013] As a preferred embodiment, the mixing chamber has a first conical cavity that gradually increases in size from left to right on its inner left side. The injection hole is connected to the first conical cavity. The left end of the injection nozzle body has a first conical surface that gradually increases in size from left to right. The left end of the mixer has a second conical surface that gradually increases in size from left to right. The first conical surface and the second conical surface are respectively constrained by the inner wall of the first conical cavity. The taper of the second conical surface is the same as the taper of the first conical cavity. The taper of the first conical surface is smaller than the taper of the first conical cavity. The discharge end of the discharge channel extends through the second conical surface.

[0014] As a preferred embodiment, the left end of the nozzle body is recessed with a positioning cavity extending along the axial direction of the nozzle body, the fluid channel extends to the right end of the positioning cavity, and the right end of the mixer is positioned inside the positioning cavity.

[0015] As a preferred embodiment, the positioning cavity has a second conical cavity that gradually decreases in size from left to right on the side near the fluid channel, the fluid channel extends to the right end of the second conical cavity, the right end of the mixer has a third conical surface that gradually decreases in size from left to right, the third conical surface is constrained by the inner wall of the second conical cavity, the taper of the third conical surface is smaller than the taper of the second conical cavity, and the feed end of the feed channel extends to the right end of the third conical surface.

[0016] As a preferred embodiment, the outer peripheral wall of the right end of the sleeve is provided with an annular seat, and the annular seat has several connecting holes penetrating the left and right ends of the annular seat.

[0017] As a preferred embodiment, the discharge channels are of several kinds, and the discharge ends of the discharge channels are arranged at intervals along the circumferential direction of the mixer on the outer peripheral wall of the left end of the mixer.

[0018] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly achieves this through the combined design of the nozzle body, sleeve, nozzle head, and mixer. The nozzle head is connected to the left end of the sleeve, giving the nozzle head a connected injection hole and a mixing chamber. The mixing chamber is connected to the receiving cavity of the sleeve. A flow channel is formed between the outer peripheral sidewall of the nozzle body and the inner peripheral sidewall of the receiving cavity, connecting the flow channel to the mixing chamber. The left end of the nozzle body extends into the mixing chamber, and the mixer is positioned inside the left end of the nozzle body, giving the mixer a connected feed channel and discharge channel. The feed end of the feed channel is connected to the fluid channel of the nozzle body, and the discharge end of the discharge channel extends to the left end of the mixer and is connected to the mixing chamber. In this way, the fluid can be diverted before flowing into the injection hole of the nozzle head through the fluid channel and the flow channel. Then, the fluid flowing into the fluid channel and the fluid flowing into the flow channel are combined and mixed through the mixing chamber and the discharge channel of the mixer. Finally, it is ejected through the injection hole. This allows for sequential diversion and merging, and the merging and mixing can be carried out at the end of the fluid flow direction of the nozzle, thereby shortening the fluid mixing path, effectively improving the color density, and effectively controlling the blending effect.

[0019] 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

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this utility model from another angle;

[0022] Figure 3 This is an exploded view of an embodiment of the present utility model;

[0023] Figure 4 This is another exploded view of an embodiment of the present utility model;

[0024] Figure 5 This is a cross-sectional view of an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached diagram:

[0026] 10. Ejection nozzle body 11. Fluid channel

[0027] 12. Convex rib; 13. First conical surface

[0028] 14. Positioning cavity; 15. Second conical cavity

[0029] 16. Connecting part; 17. Groove

[0030] 20. Sleeve; 21. Receiving cavity

[0031] 22. Mounting cavity 23. Annular seat

[0032] 24. Connecting hole; 25. Third conical cavity

[0033] 30. Nozzle head; 31. Injection hole

[0034] 32. Mixing chamber; 33. Annular mounting section

[0035] 34. Hexagonal head; 35. First conical cavity

[0036] 40. Mixer 41. Feed channel

[0037] 42. Discharge channel; 43. Second conical surface

[0038] 44. Third conical surface; 50. Flow channel. Detailed Implementation

[0039] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of the color mixing injection nozzle for injection molding machines provided in an embodiment of the present invention.

[0041] This injection molding machine uses a color-mixing injection nozzle, comprising an injection nozzle body 10, a sleeve 20, an injection nozzle head 30, and a mixer 40. The injection nozzle body 10, sleeve 20, and mixer 40 are all cylindrical. The injection nozzle body 10 has an internal fluid channel 11 that extends through both ends of the body. The sleeve 20 has a receiving cavity 21 open at both ends. The injection nozzle head 30 is connected to the left end of the sleeve 20. The nozzle 30 has a connected injection port 31 and a mixing chamber 32. The injection port 31 penetrates the left end of the nozzle head 30. The mixing chamber 32 is connected to the receiving chamber 21. The nozzle body 10 is inserted into the receiving chamber 21 from right to left. A flow channel 50 is formed between the outer peripheral sidewall of the nozzle body 10 and the inner peripheral sidewall of the receiving chamber 21. The flow channel 50 is connected to the mixing chamber 32. The left end of the nozzle body 10 extends into the mixing chamber 32. The mixer 40 is positioned inside the left end of the nozzle body 10. The left end of the mixer 40 extends outside the left end of the nozzle body 10. The mixer 40 has a connected feed channel 41 and discharge channel 42. The feed end of the feed channel 41 is connected to the fluid channel 11, and the discharge end of the discharge channel 42 extends through to the left end of the mixer 40 and is connected to the mixing chamber 32. In this way, the fluid can be diverted and flow into the nozzle head 30 before flowing into the nozzle head 30 through the fluid channel 11 and the flow channel 50. Then, the fluid flowing into the nozzle channel 11 and the fluid flowing into the flow channel 50 are combined and mixed through the mixing chamber 32 and the discharge channel 42 of the mixer 40. Then, it is ejected through the nozzle hole 31. This allows the fluid to be diverted and combined in sequence, and can be combined and mixed at the end of the fluid flow direction at the nozzle, thereby shortening the fluid mixing path, effectively improving the color density, and effectively controlling the blending effect.

[0042] The discharge channel 42 has several discharge ends, which are arranged at intervals along the circumferential direction of the mixer 40 on the outer peripheral wall of the left end of the mixer 40.

[0043] The left end of the sleeve 20 is recessed with a mounting cavity 22 extending along the axial direction of the sleeve 20. The mounting cavity 22 is connected to the receiving cavity 21. The right end of the nozzle head 30 has an annular mounting portion 33, which is installed in the mounting cavity 22. The right end opening of the mixing cavity 32 extends to the right end face of the annular mounting portion 33. In this embodiment, the inner diameter of the mounting cavity 22 is larger than the inner diameter of the receiving cavity 21, so that the right end face of the annular mounting portion 33 is constrained by the right inner wall surface of the mounting cavity 22. The outer peripheral sidewall of the annular mounting portion 33 is provided with an external thread, and the inner peripheral sidewall of the mounting cavity 22 is provided with an internal thread. The external thread and the internal thread are threadedly connected. The outer peripheral sidewall of the nozzle head 30 is provided with a hexagonal head 34 that is easy to turn with a wrench. The outer diameter of the hexagonal head 34 is larger than the outer diameter of the external thread, and the right end face of the hexagonal head 34 is constrained by the left end face of the sleeve 20. Furthermore, the axes of the nozzle body 10, sleeve 20, nozzle head 30, and mixer 40 are coincident.

[0044] The outer peripheral sidewall of the ejector nozzle body 10 is provided with a plurality of protruding ribs 12, which are arranged at uniform intervals along the circumferential direction of the ejector nozzle body 10. The protruding ribs 12 extend along the axial direction of the ejector nozzle body 10, and the side of the protruding ribs 12 away from the ejector nozzle body 10 abuts against the inner peripheral sidewall of the receiving cavity 21, so that a gap is formed between the outer peripheral sidewall of the ejector nozzle body 10 and the inner peripheral sidewall of the receiving cavity 21 to form the flow channel 50.

[0045] On the outer peripheral sidewall of the nozzle body 10, a plurality of grooves 17 are recessed on the right side of the protruding rib 12. The plurality of grooves 17 are arranged at uniform intervals along the circumferential direction of the nozzle body 10. The grooves 17 extend along the axial direction of the nozzle body 10 so that they can play a certain role in changing the fluid flow rate in the flow channel 50.

[0046] The mixing chamber 32 has a first conical cavity 35 that gradually increases in size from left to right on its inner left side. The injection hole 31 is connected to the first conical cavity 35. The left end of the injection nozzle body 10 has a first conical surface 13 that gradually increases in size from left to right. The left end of the mixer 40 has a second conical surface 43 that gradually increases in size from left to right. The first conical surface 13 and the second conical surface 43 are respectively constrained by the inner wall of the first conical cavity 35. The taper of the second conical surface 43 is the same as the taper of the first conical cavity 35. The taper of the first conical surface 13 is smaller than the taper of the first conical cavity 35 so that the first conical surface 13 does not completely fit with the inner wall of the first conical cavity 35, so as to facilitate the flow of fluid. The discharge end of the discharge channel 42 extends through the second conical surface 43. The discharge ends of several discharge channels 42 are arranged sequentially at intervals on the second conical surface 43 along the circumferential direction of the mixer 40.

[0047] The left end of the nozzle body 10 is recessed with a positioning cavity 14 extending along the axial direction of the nozzle body 10. The fluid channel 11 extends to the right end of the positioning cavity 14. The right end of the mixer 40 is positioned in the positioning cavity 14. Preferably, the mixer 40 can move in the positioning cavity 14 under the force generated by the fluid flowing into the fluid channel 11 or the flow channel 50.

[0048] The positioning cavity 14 has a second conical cavity 15 that gradually decreases in size from left to right on the side near the fluid channel 11. The fluid channel 11 extends to the right end of the second conical cavity 15. The right end of the mixer 40 has a third conical surface 44 that gradually decreases in size from left to right. The third conical surface 44 is constrained by the inner wall of the second conical cavity 15. The taper of the third conical surface 44 is smaller than that of the second conical cavity 15, so that the third conical surface 44 does not completely fit with the inner wall of the second conical cavity 15, which facilitates the flow of fluid. The feed end of the feed channel 41 extends to the right end of the third conical surface 44.

[0049] The outer peripheral wall of the right end of the sleeve 20 is provided with an annular seat 23. The annular seat 23 has several connecting holes 24 penetrating the left and right ends of the annular seat 23, so that the sleeve 20 can be connected and fixed to the mixing seat of the injection molding machine through the annular seat 23 and the connecting holes 24.

[0050] The right end opening of the sleeve 20 is provided with a third conical cavity 25 that gradually increases in size from left to right. The right end of the receiving cavity 21 is connected to the third conical cavity 25. The injection nozzle body 10 passes through the third conical cavity 25 from right to left and is inserted into the receiving cavity 21. The flow channel 50 is connected to the third conical cavity 25. The third conical cavity 25 is used to dock with the auxiliary flow channel on the mixing seat of the injection molding machine.

[0051] The right end of the nozzle body 10 extends beyond the right end of the sleeve 20. The right end of the nozzle body 10 has a connecting part 16. The outer peripheral sidewall of the connecting part 16 is provided with an external thread. In this way, the nozzle body 10 can be threadedly connected to the internal thread on the mixing seat of the injection molding machine through the external thread of the connecting part 16, so that the fluid channel 11 of the nozzle body 10 is connected to the main channel on the mixing seat of the injection molding machine.

[0052] In summary, the key design feature of this utility model lies in its combined design of the nozzle body, sleeve, nozzle head, and mixer. The nozzle head is connected to the left end of the sleeve, giving it a connected injection hole and mixing chamber. The mixing chamber is connected to the receiving cavity of the sleeve. A flow channel is formed between the outer peripheral wall of the nozzle body and the inner peripheral wall of the receiving cavity, connecting the flow channel to the mixing chamber. The left end of the nozzle body extends into the mixing chamber. The mixer is positioned within the left end of the nozzle body, providing a connected feed channel and discharge channel. The feed end of the feed channel is connected to... The fluid channel of the nozzle body and the discharge end of the discharge channel extend to the left end of the mixer and are connected to the mixing chamber. In this way, the fluid can be diverted before flowing into the injection hole of the nozzle head through the fluid channel and the flow channel. Then, the fluid flowing into the fluid channel and the fluid flowing into the flow channel are merged and mixed through the mixing chamber and the discharge channel of the mixer. Then, it is ejected through the injection hole. This allows the fluid to be diverted and merged in sequence, and the merging and mixing can be carried out at the end of the fluid flow direction of the nozzle. This shortens the fluid mixing path, effectively improves the color density, and effectively controls the blending effect.

[0053] 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 color mixing injection nozzle for an injection molding machine, comprising a nozzle body having a fluid passageway formed therein, the fluid passageway extending through both ends of the nozzle body; characterized by: The sleeve, the nozzle head and the mixing device are also included. The sleeve has an accommodating cavity with two open ends, the nozzle head is connected to the left end of the sleeve, the nozzle head has a glue injection hole and a mixing cavity connected to each other, the glue injection hole penetrates through the left end of the nozzle head, the mixing cavity is connected to the accommodating cavity, the nozzle body is arranged in the accommodating cavity from right to left, and a flow channel is formed between the outer circumferential wall of the nozzle body and the inner circumferential wall of the accommodating cavity, the flow channel is connected to the mixing cavity. The left end of the nozzle body extends into the mixing cavity, the mixing device is positioned in the left end of the nozzle body, the left end of the mixing device extends out of the left end of the nozzle body, the mixing device has an inlet channel and an outlet channel connected to each other, the inlet end of the inlet channel is connected to the fluid channel, and the outlet end of the outlet channel penetrates to the left end of the mixing device and is connected to the mixing cavity.

2. The multi-color injection nozzle of claim 1, wherein: The left end of the sleeve is concave and has a mounting cavity extending in the axial direction of the sleeve, the mounting cavity is connected to the accommodating cavity, the right end of the nozzle head has an annular mounting portion, the annular mounting portion is mounted in the mounting cavity, and the right end opening of the mixing cavity penetrates to the right end surface of the annular mounting portion.

3. The multi-color injection nozzle of claim 1, wherein: The right end of the nozzle body extends out of the right end of the sleeve, and the right end of the nozzle body has a connecting portion.

4. The multi-color injection nozzle of claim 1, wherein: A plurality of convex ribs are protruded on the outer circumferential wall of the nozzle body, the plurality of convex ribs are arranged in sequence with a certain interval in the circumferential direction of the nozzle body, the convex ribs extend in the axial direction of the nozzle body, and the side of the convex ribs away from the nozzle body is limited by the inner circumferential wall of the accommodating cavity.

5. The multi-color injection nozzle of claim 1, wherein: The inner left side of the mixing cavity has a first tapered cavity gradually increasing from left to right, the glue injection hole is connected to the first tapered cavity, the left end of the nozzle body has a first tapered surface gradually increasing from left to right, the left end of the mixing device has a second tapered surface gradually increasing from left to right, the first tapered surface and the second tapered surface are respectively limited by the inner wall of the first tapered cavity, the taper of the second tapered surface is the same as the taper of the first tapered cavity, the taper of the first tapered surface is smaller than the taper of the first tapered cavity, and the outlet end of the outlet channel penetrates to the second tapered surface.

6. The multi-color injection nozzle of claim 1, wherein: The left end of the nozzle body is concave and has a positioning cavity extending in the axial direction of the nozzle body, and the fluid channel penetrates to the right end of the positioning cavity.

7. The multi-color injection nozzle of claim 6, wherein: The side of the positioning cavity close to the fluid channel has a second tapered cavity gradually decreasing from left to right, the fluid channel penetrates to the right end of the second tapered cavity, the right end of the mixing device has a third tapered surface gradually decreasing from left to right, the third tapered surface is limited by the inner wall of the second tapered cavity, the taper of the third tapered surface is smaller than the taper of the second tapered cavity, and the inlet end of the inlet channel penetrates to the right end of the third tapered surface.

8. The multi-color injection nozzle of claim 1, wherein: The outer circumferential wall of the right end of the sleeve is protruded with an annular seat body, the annular seat body has a plurality of connecting holes penetrating through the left and right ends of the annular seat body.

9. The multi-color injection nozzle of claim 1, wherein: The outlet channel has a plurality of outlet ends arranged in sequence with a certain interval on the outer circumferential wall of the left end of the mixing device in the circumferential direction of the mixing device.

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