Needle valve hot runner assembly

Abstract

The present invention provides a needle valve hot runner assembly, comprising a manifold plate and a valve needle sleeve and a hot nozzle arranged on both sides of the manifold plate. The valve needle is inserted into the valve needle sleeve and the hot nozzle. The end of the valve needle facing away from the hot nozzle passes through the valve needle sleeve and is connected to a cylinder. A cylinder gasket is provided between the cylinder and the manifold plate. The cylinder gasket sleeve is provided on the outside of the end of the valve needle sleeve protruding from the manifold plate. Overflow holes are correspondingly provided on the valve needle sleeve and the cylinder gasket. The overflow holes radially penetrate the valve needle sleeve and the cylinder gasket. The cylinder gasket abuts against the end of the cylinder body facing the manifold plate. The piston is connected to the valve needle and can be driven to reciprocate along the axial direction of the valve needle to abut or separate from the valve needle sleeve. The present invention solves the problem in the prior art that the injection liquid overflowing from the valve needle sleeve accumulates and solidifies on the end near the piston, resulting in the valve needle being unable to close the liquid outlet.

Description

Technical Field

[0001] The invention belongs to the technical field of hot runner injection molding, and in particular relates to a needle valve type hot runner component. Background Art

[0002] In the prior art, when injection molding is performed through a valve needle hot runner, the valve needle is connected to the piston of the cylinder. The action of the cylinder piston is controlled to control the axial movement of the valve needle, thereby controlling the opening and closing of the liquid outlet through the valve needle.

[0003] Generally speaking, the valve needle is inserted into the valve needle sleeve. The long-term reciprocating movement of the valve needle will cause the valve needle sleeve to wear and cause the injection molding liquid in the diverter plate to overflow from the valve needle sleeve. Since the injection molding liquid is usually in high-speed and high-pressure operating conditions, the overflowed injection molding liquid will condense on the end of the valve needle sleeve close to the piston and accumulate more and more. In the traditional valve needle sleeve structure, the abutment between the valve needle sleeve and the piston limits the extreme position of the valve needle moving toward the liquid outlet. When the piston and the valve needle sleeve close to the piston are in abutment, the valve needle connected to the piston can be extended into the liquid outlet to close the liquid outlet. As more and more injection molding liquid condenses on the end of the valve needle sleeve close to the piston, the valve needle will eventually fail to reach the position to close the liquid outlet, thereby affecting the opening and closing of the liquid outlet.

[0004] It can be seen that in the prior art, there is a problem in that the injection liquid overflowing from the valve needle sleeve accumulates and solidifies on the end close to the piston, resulting in the valve needle being unable to close the liquid outlet. Summary of the Invention

[0005] The object of the present invention is to provide a needle valve hot runner assembly to solve the problem in the prior art that the injection liquid overflowing from the valve needle sleeve accumulates and solidifies on one end close to the piston, causing the valve needle to be unable to close the liquid outlet.

[0006] In order to achieve the above-mentioned objectives of the present invention, one embodiment of the present invention provides a needle valve type hot runner assembly, which includes a diverter plate and a valve needle sleeve and a hot nozzle relatively arranged on both sides of the diverter plate, the valve needle is inserted into the valve needle sleeve and the hot nozzle, and the end of the valve needle facing away from the hot nozzle passes through the valve needle sleeve and is connected to the cylinder, a cylinder gasket is provided between the cylinder and the diverter plate, the cylinder gasket sleeve is provided on the outside of one end of the valve needle sleeve protruding from the diverter plate, and overflow holes are correspondingly provided on the valve needle sleeve and the cylinder gasket, the overflow hole radially penetrates the valve needle sleeve and the cylinder gasket, the cylinder gasket abuts on the end of the cylinder body facing the diverter plate, the piston is connected to the valve needle and can be driven to reciprocate along the axial direction of the valve needle to abut or separate from the valve needle sleeve.

[0007] As a further improvement of one embodiment of the present invention, a accommodating groove is provided on the side of the cylinder gasket facing the diverter plate, the valve needle sleeve protrudes from the diverter plate at one end and is passed through the bottom wall of the accommodating groove and passes through the cylinder gasket, and the overflow hole located on the cylinder gasket is passed through the side wall of the accommodating groove.

[0008] As a further improvement of one embodiment of the present invention, a guide sleeve pressure cap is further provided on the valve needle sleeve, and the guide sleeve pressure cap is located between the diverter plate and the cylinder gasket and is connected to the diverter plate. The guide sleeve pressure cap abuts against the valve needle sleeve in the axial direction of the valve needle sleeve to fix the valve needle sleeve on the diverter plate.

[0009] As a further improvement of one embodiment of the present invention, the valve needle sleeve has a flange formed along the circumference of its side wall, a mounting groove is provided on the diverter plate, the flange is located in the mounting groove, and the guide sleeve pressure cap abuts on the side of the flange away from the bottom wall of the mounting groove.

[0010] As a further improvement of one embodiment of the present invention, the cylinder also includes a rod side end cover sealed with the cylinder body, the rod side end cover is connected to the inner side of the cylinder body side wall near the diverter plate, and the rod side end cover is provided with a guide hole for the piston to pass through.

[0011] As a further improvement of one embodiment of the present invention, a gasket is provided with a sidewall of the gasket facing the cylinder, the sidewall of the gasket abuts against the end of the cylinder body facing the diverter plate, and the end face of the valve needle sleeve protruding from the diverter plate is located in the gasket or flush with the inner bottom wall of the gasket.

[0012] As a further improvement of an embodiment of the present invention, the hot nozzle includes a hot nozzle body and a nozzle tip connected to one end of the hot nozzle body, and the end of the hot nozzle body not connected to the nozzle tip is connected to the diverter plate.

[0013] As a further improvement of one embodiment of the present invention, the hot nozzle provided on the diverter plate defines a hot runner located in the hot nozzle and the diverter plate, the hot runner is divided into a diverter channel located in the diverter plate and an injection channel located in the hot nozzle and connected to the diverter channel, the injection channel includes a first channel, a second channel and a discharge port connected in sequence, the hot nozzle body defines the first channel connected to the diverter channel, the nozzle tip defines the second channel and the discharge port, and the valve needle extends from the valve needle port on the diverter channel into the diverter channel, the first channel and the second channel.

[0014] As a further improvement of one embodiment of the present invention, the hot nozzle also includes a pressure cap fixedly connected to the inner side of the hot nozzle body by threads, and the pressure cap abuts against the nozzle tip along the axial direction of the hot nozzle body to fix the nozzle tip to the inner side of the hot nozzle body.

[0015] As a further improvement of an embodiment of the present invention, the hot nozzle further includes a heat insulation cap, which is sleeved on the peripheral surface of the tip of the nozzle tip and clamped between the pressure cap and the tip.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By arranging a cylinder gasket between the diverter plate and the cylinder, and arranging the cylinder gasket sleeve on the outside of one end of the valve needle sleeve protruding from the diverter plate, and correspondingly arranging overflow holes on the valve needle sleeve and the cylinder gasket, when high-speed, high-pressure injection molding liquid leaks outward through the valve needle sleeve, it will overflow through the overflow hole, so that the overflowed injection molding liquid will not accumulate at the end of the valve needle sleeve close to the piston, thereby solving the problem of the valve needle not being able to close in place due to the accumulation of injection molding liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a half-section of a needle valve hot runner assembly in one embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle manifold;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the cylinder head gasket;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle cylinder;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure of the cylinder after removing the piston;

[0023] Figure 6 for Figure 1 Schematic diagram of the structure of the medium hot nozzle.

[0024] The above description of the drawings includes the following reference numerals:

[0025] 1. Manifold; 11. Mounting groove; 12. Diverter channel; 121. Valve needle port;

[0026] 2. Valve needle sleeve; 21. Overflow hole; 22. Guide sleeve pressure cap; 23. Flange;

[0027] 3. Hot nozzle; 31. Hot nozzle body; 32. Nozzle tip; 33. Liquid injection channel; 311. First flow channel; 321. Second flow channel; 322. Discharge port; 34. Press cap; 35. Heat insulation cap;

[0028] 4. Valve needle;

[0029] 5. Cylinder; 51. Cylinder body; 52. Piston; 53. Rod-side end cap; 531. Guide hole;

[0030] 6. Cylinder gasket; 61. Accommodation groove; 611. Overflow hole; 62. Air avoidance groove. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0034] In conventional valve-needle hot runner injection molding, the valve needle is connected to the piston of a cylinder. Controlling the piston's movement controls the axial movement of the valve needle, thereby controlling the opening and closing of the liquid outlet. Typically, the valve needle is inserted into a valve needle sleeve. Prolonged reciprocating motion of the valve needle can wear the valve needle sleeve and cause the injection liquid in the manifold to overflow from the valve needle sleeve.

[0035] Because injection molding fluid is typically subjected to high-speed, high-pressure operating conditions, overflowing injection molding fluid will condense and accumulate on the end of the valve needle sleeve near the piston. In traditional valve needle sleeve structures, the abutment between the valve needle sleeve and the piston defines the limit of the valve needle's movement toward the liquid outlet. When the piston abuts the end of the valve needle sleeve near the piston, the valve needle connected to the piston can extend into the liquid outlet to close it. As more and more injection molding fluid condenses on the end of the valve needle sleeve near the piston and solidifies, the valve needle will eventually fail to close the liquid outlet, affecting the opening and closing of the liquid outlet.

[0036] In order to solve the above problems in the prior art, the present invention provides a needle valve type hot runner assembly.

[0037] like Figure 1-5 As shown, a needle valve type hot runner assembly in this embodiment includes a diverter plate 1 and a valve needle sleeve 2 and a hot nozzle 3 relatively arranged on both sides of the diverter plate 1, the valve needle 4 is inserted into the valve needle sleeve 2 and the hot nozzle 3, and the end of the valve needle 4 facing away from the hot nozzle 3 passes through the valve needle sleeve 2 and is connected to the cylinder 5, and a cylinder gasket 6 is provided between the cylinder 5 and the diverter plate 1, and the cylinder gasket 6 is sleeved on the outer side of one end of the valve needle sleeve 2 protruding from the diverter plate, and the valve needle sleeve 2 and the cylinder gasket 6 are correspondingly provided with an overflow hole 21 and an overflow hole 61, and the overflow hole 21 and the overflow hole 611 respectively penetrate the valve needle sleeve 2 and the cylinder gasket 6 in the radial direction, and the cylinder gasket 6 abuts on the end of the cylinder body 51 facing the diverter plate, and the piston 52 is connected to the valve needle 4 and can be driven to reciprocate along the axial direction of the valve needle to abut or separate from the valve needle sleeve 2.

[0038] The above-mentioned setting method is achieved by arranging a cylinder gasket 6 between the diverter plate 1 and the cylinder 5, and sleeves the cylinder gasket 6 on the outer side of one end of the valve needle sleeve 2 protruding from the diverter plate, and an overflow hole 21 and an overflow hole 61 are correspondingly arranged on the valve needle sleeve 2 and the cylinder gasket 6. When the high-speed, high-pressure injection liquid leaks outward through the valve needle sleeve 2, it will overflow through the overflow hole 21 and the overflow hole 61, so that the overflowed injection liquid will not accumulate at the end of the valve needle sleeve 2 close to the piston, thereby solving the problem of the valve needle not being able to close in place due to the accumulation of injection liquid.

[0039] It should be noted that the valve needle sleeve 2 is typically tubular. Therefore, the overflow hole 21 provided on the valve needle sleeve 2 is necessarily located on the sidewall of the valve needle sleeve 2 to achieve communication between the inside and outside of the valve needle sleeve 2. The overflow port 611 is provided corresponding to the overflow hole 21. Furthermore, the overflow hole 21 and the overflow hole 611 radially penetrate the valve needle sleeve 2 and the cylinder gasket 6, respectively. This arrangement ensures that the high-pressure, high-speed injection molding fluid in the valve needle sleeve 2 can flow out of the overflow hole 21 on the sidewall of the valve needle sleeve 2 without flowing onto the end of the valve needle sleeve 2 near the piston 52.

[0040] Furthermore, in order to better gather the injection liquid leaking from the valve needle sleeve 2 so that it can flow out through the overflow hole 21 and the overflow hole 61, as shown in FIG. Figure 2 As shown, a receiving groove 61 can be provided on the side of the cylinder gasket 6 facing the manifold plate, with the opening of the receiving groove 61 facing the manifold plate 1. The end of the valve needle sleeve 2 protruding from the manifold plate 1 is inserted through the bottom wall of the receiving groove 61 and extends through the cylinder gasket 6. The overflow hole 611 located on the cylinder gasket 6 is inserted through the side wall of the receiving groove 61. It is understood that when the injection molding liquid leaks out through the overflow hole 21 on the valve needle sleeve 2, it will first accumulate in the receiving groove 61 and then overflow outward through the overflow hole 611 on the side wall of the receiving groove 61.

[0041] Since the bottom wall and the side wall of the accommodating groove 61 are located in two intersecting planes, the overflow hole 611 located on the side wall will not flow onto the end surface of one end of the valve needle sleeve 2 passing through the bottom wall during the process of discharging the injection liquid.

[0042] It should be noted that after the end of the valve needle sleeve 2 protrudes from the diverter plate 1 and penetrates the cylinder gasket, the piston 52 can abut against or separate from the cylinder gasket during the process of expansion and contraction.

[0043] In order to conveniently fix the valve needle sleeve 2 on the diverter plate, a guide sleeve pressure cap 22 is also provided on the valve needle sleeve 2. The guide sleeve pressure cap 22 is located between the diverter plate 1 and the cylinder gasket 6 and is connected to the diverter 1. The connection method between the guide sleeve pressure cap 22 and the diverter plate can be a detachable connection method such as a threaded connection or a snap connection, which is not limited in the present invention.

[0044] Furthermore, the guide sleeve pressing cap 22 abuts against the valve needle sleeve 2 in the axial direction of the valve needle sleeve 2 so that the valve needle sleeve 2 is fixed to the diverter plate 1 through the guide sleeve pressing cap 22 .

[0045] As a preferred embodiment, in this example, the valve needle sleeve 2 has a flange 23 formed along the circumference of its side wall. The manifold 1 is provided with a mounting groove 11, and the flange 23 is located within the mounting groove 11. The guide sleeve pressing cap 22 abuts the side of the flange 23 facing away from the bottom wall of the mounting groove 11. The abutment between the guide sleeve pressing cap 22 and the flange 23 enables the valve needle sleeve 2 to be fixed to the manifold.

[0046] It is not difficult to understand that since the flange 23 is formed on the circumference of the side wall of the valve needle sleeve 2, when the flange 23 is set in the installation groove 11, the end of the valve needle sleeve 2 connected to the diverter plate 1 can also be set in the installation groove 11 and abut against the bottom wall of the installation groove 11, thereby further ensuring the stability of the valve needle sleeve 2 installed on the diverter plate 1.

[0047] Further, if Figure 3-4 As shown, the cylinder 5 also includes a rod-side end cap 53 sealed with the cylinder body 51. The rod-side end cap 53 is attached to the inner sidewall of the cylinder body 51 near the manifold 1. A guide hole 531 is provided in the rod-side end cap 53 for the piston to pass through. The rod-side end cap 53 prevents foreign matter from entering the cylinder body 51 and damaging the piston. The guide hole 531 in the rod-side end cap 53 prevents radial movement of the piston 52 during movement, which could cause the valve needle 4 connected thereto to wear the valve needle sleeve 2.

[0048] As a preferred embodiment, in this embodiment, Figure 2As shown, an air avoidance groove 62 is provided on the surface of the cylinder gasket facing the cylinder, and the side wall of the air avoidance groove 62 abuts against the end of the cylinder body 51 facing the diverter plate 1. This arrangement can enable the side wall of the air avoidance groove 62 to have a greater elastic force when abutting against the cylinder body 51 than when the plane abuts against the cylinder body 51, so that the diverter plate 1 can better fit with the hot nozzle 3.

[0049] Furthermore, the end surface of the valve needle sleeve 2 protruding from the diverter plate 1 is located in the air avoidance groove 62 or is flush with the inner bottom wall of the air avoidance groove 62. This arrangement ensures that the piston can abut the end surface of the valve needle sleeve 2 during the expansion and contraction process.

[0050] Generally speaking, if Figure 1 and Figure 5 As shown, the hot nozzle 3 includes a hot nozzle body 31 and a nozzle tip 32 connected to one end of the hot nozzle body, and the end of the hot nozzle body 31 not connected to the nozzle tip is connected to the diverter plate 1.

[0051] It can be understood that the hot nozzle 3 provided on the diverter plate 1 defines a hot runner located in the hot nozzle 3 and the diverter plate 1, and the hot runner is divided into a diverter channel 12 located in the diverter plate 1 and an injection channel 33 located in the hot nozzle and connected to the diverter channel 12. The injection channel 33 includes a first channel 311, a second channel 321 and a discharge port 322 that are connected in sequence. The hot nozzle body 31 defines the first channel 311 connected to the diverter channel 12, and the nozzle tip 32 defines the second channel 321 and the discharge port 322. The valve needle 4 extends from the valve needle port 121 on the diverter channel 12 into the diverter channel 12, the first channel 311 and the second channel 321.

[0052] In this embodiment, the hot nozzle 3 further includes a pressing cap 34 fixedly connected to the inner side of the hot nozzle body by means of threads. The pressing cap 34 abuts against the nozzle tip 32 along the axial direction of the hot nozzle body 31 to fix the nozzle tip 32 to the inner side of the hot nozzle body 31. The pressing cap 34 is threadedly connected to the inner side of the hot nozzle body, thereby fixing the nozzle tip 32 to the hot nozzle body 31 and enabling easy removal.

[0053] Furthermore, the hot nozzle 2 further includes a heat insulating cap 35, which is sleeved on the peripheral surface of the tip of the nozzle tip 32 and clamped between the pressure cap 34 and the tip. The provision of the heat insulating cap 35 can isolate the nozzle tip 32 from contact with the mold, reducing heat loss.

[0054] To sum up, the embodiments of the present invention achieve the following technical effects: by arranging a cylinder gasket 6 between the diverter plate 1 and the cylinder 5, and sleeved on the outer side of one end of the valve needle sleeve 2 protruding from the diverter plate, and correspondingly arranging overflow holes 21 and overflow holes 61 on the valve needle sleeve 2 and the cylinder gasket 6, when high-speed, high-pressure injection liquid leaks outward through the valve needle sleeve 2, it will overflow through the overflow holes 21 and the overflow holes 61, so that the overflowed injection liquid will not accumulate at the end of the valve needle sleeve 2 close to the piston, thereby solving the problem of the valve needle not being able to close in place due to the accumulation of injection liquid.

[0055] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0057] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0058] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A needle valve hot runner assembly, characterized in that: It comprises a diverter plate (1) and a valve needle sleeve (2) and a hot nozzle (3) arranged on both sides of the diverter plate (1), wherein the valve needle (4) is inserted into the valve needle sleeve (2) and the hot nozzle (3), and the end of the valve needle (4) away from the hot nozzle (3) passes through the valve needle sleeve (2) and is connected to the cylinder (5), and a cylinder gasket (6) is provided between the cylinder (5) and the diverter plate (1), and the cylinder gasket (6) is sleeved on the outer side of one end of the valve needle sleeve (2) protruding from the diverter plate. Overflow holes (21, 611) are correspondingly provided on the valve needle sleeve (2) and the cylinder gasket (6), and the overflow holes (21, 611) radially penetrate the valve needle sleeve (2) and the cylinder gasket (6). The cylinder gasket (6) abuts against one end of the cylinder body (51) facing the diverter plate. The piston (52) of the cylinder (5) is connected to the valve needle (4) and can be driven to reciprocate along the axial direction of the valve needle to abut against or separate from the valve needle sleeve (2). The cylinder gasket (6) is provided with a receiving groove (61) on one side facing the diverter plate, the valve needle sleeve (2) protruding from the diverter plate (1) at one end is penetrated on the bottom wall of the receiving groove (61) and passes through the cylinder gasket (6), and the overflow hole (611) located on the cylinder gasket (6) is penetrated on the side wall of the receiving groove (61); A clearance groove (62) is provided on a surface of the cylinder gasket (6) facing the cylinder, and a side wall of the clearance groove (62) abuts against an end of the cylinder body (51) facing the diverter plate (1), and an end surface of the valve needle sleeve (2) protruding from the diverter plate (1) is located in the clearance groove (62) or is flush with the inner bottom wall of the clearance groove (62).

2. The needle valve hot runner assembly according to claim 1, characterized in that: The valve needle sleeve (2) is also provided with a guide sleeve pressure cap (22), the guide sleeve pressure cap (22) is located between the diverter plate (1) and the cylinder gasket (6) and is connected to the diverter plate, and the guide sleeve pressure cap (22) abuts against the valve needle sleeve (2) in the axial direction of the valve needle sleeve (2) to fix the valve needle sleeve (2) on the diverter plate (1).

3. The needle valve hot runner assembly according to claim 2, characterized in that: The valve needle sleeve (2) has a flange (23) formed along the circumference of its side wall, a mounting groove (11) is provided on the diverter plate (1), the flange (23) is located in the mounting groove (11), and the guide sleeve pressure cap (22) abuts against the side of the flange (23) away from the bottom wall of the mounting groove (11).

4. The needle valve type hot runner assembly according to claim 1, characterized in that: The cylinder (5) further comprises a rod side end cover (53) sealedly connected to the cylinder body (51), the rod side end cover (53) being connected to the inner side of the side wall of the cylinder body (51) near the diverter plate (1), and a guide hole (531) for the piston to pass through is provided on the rod side end cover (53).

5. The needle valve type hot runner assembly according to claim 1, characterized in that: The hot nozzle (3) comprises a hot nozzle body (31) and a nozzle tip (32) connected to one end of the hot nozzle body, and the end of the hot nozzle body (31) not connected to the nozzle tip is connected to the diverter plate (1).

6. The needle valve type hot runner assembly according to claim 5, characterized in that: The hot nozzle (3) provided on the diverter plate (1) defines a hot runner located in the hot nozzle (3) and the diverter plate (1), and the hot runner is divided into a diverter channel (12) located in the diverter plate and an injection channel (33) located in the hot nozzle and connected to the diverter channel. The injection channel (33) includes a first channel (311), a second channel (321) and a discharge port (322) connected in sequence. The hot nozzle body (31) defines the first channel (311) connected to the diverter channel (12), and the nozzle tip (32) defines the second channel (321) and the discharge port (322). The valve needle (4) extends from the valve needle port (121) on the diverter channel (12) into the diverter channel (12), the first channel (311) and the second channel (321).

7. The needle valve type hot runner assembly according to claim 5, characterized in that: The hot nozzle (2) further comprises a pressure cap (34) fixedly connected to the inner side of the hot nozzle body by a thread, wherein the pressure cap (34) abuts against the nozzle tip (32) along the axial direction of the hot nozzle body (31) to fix the nozzle tip (32) to the inner side of the hot nozzle body (31).

8. The needle valve type hot runner assembly according to claim 7, characterized in that: The hot nozzle (2) further comprises a heat-insulating cap (35), which is sleeved on the peripheral surface of the tip of the nozzle tip (32) and clamped between the pressure cap (34) and the tip.

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