Nozzle tip and hot nozzle assembly

Abstract

The utility model provides a nozzle tip and a hot nozzle assembly. The nozzle tip comprises a heat conduction outer pipe, the wear-resistant inner pipe is sleeved in the heat-conducting outer pipe; the first flow channel is positioned in the wear-resistant inner pipe; wherein the thickness of the pipe wall of the wear-resistant inner pipe is smaller than that of the pipe wall of the heat-conducting outer pipe. The nozzle tip is arranged to be of a two-layer integrated structure in which the heat conduction outer pipe is matched with the wear-resistant inner pipe, so that the nozzle tip not only has high heat conduction performance, but also has excellent wear resistance and corrosion resistance, and the flowability and forming quality of plastic fluid are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hot runner technology, and in particular to a nozzle tip and hot nozzle assembly. Background Technology

[0002] Traditional nozzle designs typically use a single material. When copper is used, it has good thermal conductivity but insufficient corrosion resistance and wear resistance; when steel is used, it has good corrosion resistance and wear resistance but insufficient thermal conductivity. This limits the application scenarios and service life of the nozzle.

[0003] In view of this, it is necessary to provide a mouth tip to solve the above-mentioned technical problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides a nozzle tip, which includes a heat-conducting outer tube and a wear-resistant inner tube sleeved inside the heat-conducting outer tube, wherein the wear-resistant inner tube is provided with a first flow channel; wherein the wall thickness of the wear-resistant inner tube is less than the wall thickness of the heat-conducting outer tube.

[0005] As a further improvement of this utility model, the outer heat-conducting tube is made of copper, and the inner wear-resistant tube is made of steel.

[0006] As a further improvement of this utility model, the wall thickness of the wear-resistant inner tube is 0.1mm to 1mm.

[0007] As a further improvement of this utility model, the heat-conducting outer tube and the wear-resistant inner tube are interference-fitted.

[0008] As a further improvement of this utility model, the heat-conducting outer tube includes a boss portion and a connecting portion connected to the boss portion. The outer diameter of the boss portion is larger than the outer diameter of the connecting portion, and a bearing surface is formed at the connection position between the boss portion and the connecting portion.

[0009] As a further improvement of this utility model, the heat-conducting outer tube also includes a lower end located at the end of the connecting portion away from the boss portion, and the outer diameter of the connecting portion is larger than the outer diameter of the lower end.

[0010] As a further improvement of this utility model, from the feed end to the discharge end of the first flow channel, the wear-resistant inner tube includes a first variable diameter section, a first straight section, a second variable diameter section and a second straight section connected in sequence. From the feed end to the discharge end, the inner diameter of the first variable diameter section and the second variable diameter section gradually decreases; the wall thickness of each section of the wear-resistant inner tube is the same.

[0011] This utility model also provides a hot nozzle assembly, which includes a hot nozzle and the aforementioned nozzle tip, wherein the hot nozzle has a second flow channel, and the nozzle tip is connected to the hot nozzle to connect the first flow channel and the second flow channel.

[0012] As a further improvement of this utility model, it also includes a fixing sleeve for fixing the nozzle tip inside the hot nozzle, the fixing sleeve being disposed on the outside of the nozzle tip, and the fixing sleeve abutting against the protrusion portion of the heat-conducting outer tube.

[0013] As a further improvement of this utility model, the fixing sleeve includes a first fixing part and a second fixing part connected to the first fixing part. The first fixing part is located outside the connecting part of the heat-conducting outer tube, and the second fixing part is located outside the lower end of the heat-conducting outer tube.

[0014] The first fixing part is provided with threads to connect with the hot nozzle, and a clearance is provided between the second fixing part and the lower end.

[0015] The beneficial effects of this utility model are as follows: By setting the nozzle tip as a two-layer integrated structure of the heat-conducting outer tube and the wear-resistant inner tube, the nozzle tip has both high thermal conductivity and excellent wear resistance and corrosion resistance, thus ensuring the fluidity and molding quality of the plastic fluid. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the tip of the present invention;

[0018] Figure 2 This is a schematic diagram of the wear-resistant inner tube of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the heat-conducting outer tube of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the hot nozzle assembly of this utility model;

[0021] Figure 5 for Figure 4 Enlarged diagram of A in the middle;

[0022] In the picture:

[0023] 100. Nozzle tip; 101. Heat-conducting outer tube; 101a. Boss portion; 101b. Connecting portion; 101c. Lower end; 102. Wear-resistant inner tube; 102a. First diameter changing portion; 102b. First straight portion; 102c. Second diameter changing portion; 102d. Second straight portion; 103. First flow channel; 103a. Feed end; 103b. Discharge end; 200. Hot nozzle; 201. Second flow channel; 202. Limiting portion; 300. Fixing sleeve; 301. First fixing portion; 302. Second fixing portion; 400. Clearance. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] like Figures 1 to 3 As shown, the nozzle tip 100 provided by this utility model includes a heat-conducting outer tube 101, a wear-resistant inner tube 102 sleeved inside the heat-conducting outer tube 101, and a first flow channel 103 located inside the wear-resistant inner tube 102.

[0029] The first flow channel 103 within the wear-resistant inner tube 102 is used for the flow of plastic fluid. The wear-resistant inner tube 102 has excellent wear resistance and corrosion resistance. Thus, even when a corrosive or abrasive plastic fluid flows through the first flow channel 103, the wear-resistant inner tube 102 can effectively resist wear, thereby improving the service life of the nozzle tip 100. The outer side of the wear-resistant inner tube 102 is fitted with a heat-conducting outer tube 101. The heat-conducting outer tube 101 has high thermal conductivity, thereby ensuring the temperature uniformity of the plastic fluid flowing through the first flow channel 103 and preventing uneven temperature from affecting the fluidity and molding quality of the plastic fluid.

[0030] In this embodiment, the outer heat-conducting tube 101 is made of copper, which has high thermal conductivity, thereby improving the thermal conductivity of the nozzle tip 100 and ensuring uniform temperature of the plastic fluid. The inner wear-resistant tube 102 is made of steel, which has excellent wear resistance and corrosion resistance, thereby effectively improving the service life of the nozzle tip 100.

[0031] It should be noted that the wall thickness of the wear-resistant inner tube 102 is less than that of the heat-conducting outer tube 101. Since the thermal conductivity of the wear-resistant inner tube 102 is much lower than that of the heat-conducting outer tube 101, by reducing the wall thickness of the wear-resistant inner tube 102, the nozzle tip 100 can simultaneously possess excellent wear resistance and corrosion resistance without sacrificing its thermal conductivity.

[0032] The wall thickness of the wear-resistant inner tube 102 is 0.1 mm to 1 mm. The wall thickness of the wear-resistant inner tube 102 should not be too large, otherwise it will affect the thermal conductivity of the nozzle tip 100; the wall thickness of the wear-resistant inner tube 102 should not be too small, otherwise it will reduce the wear resistance and corrosion resistance of the nozzle tip 100. The wall thickness of the heat-conducting outer tube 101 can be adjusted as needed, and this document does not impose specific limitations on it.

[0033] The heat-conducting outer tube 101 and the wear-resistant inner tube 102 are interference-fitted, meaning they maintain contact at all points, ensuring a tight, integrated connection and preventing loosening. This also reduces structural connection points, improving overall strength and sealing, and reduces wear points, enhancing durability and operational stability. The interference fit also enables efficient heat conduction between the two, preventing uneven temperature distribution of the plastic fluid within the first flow channel 103.

[0034] The first flow channel 103 includes a feed end 103a and a discharge end 103b. From the feed end 103a to the discharge end 103b, the heat-conducting outer tube 101 includes a boss portion 101a, a connecting portion 101b and a lower end portion 101c connected in sequence.

[0035] The outer diameter of the boss portion 101a is larger than the outer diameter of the connecting portion 101b, thereby forming a bearing surface at the connection position of the boss portion 101a and the connecting portion 101b. The outer diameters of the boss portion 101a and the connecting portion 101b remain unchanged. The outer diameter of the lower end portion 101c is smaller than the outer diameter of the connecting portion 101b, and the outer diameter of the lower end portion 101c gradually changes.

[0036] The length of the boss portion 101a along the axial direction of the tip 100 is less than the length of the connecting portion 101b and the lower end portion 101c along the axial direction of the tip 100, which facilitates the subsequent assembly and fixation of the tip 100.

[0037] From the feed end 103a to the discharge end 103b, the wear-resistant inner tube 102 includes a first variable diameter section 102a, a first straight section 102b, a second variable diameter section 102c, and a second straight section 102d connected in sequence.

[0038] The inner diameter of the first variable-diameter section 102a gradually decreases from the feed end 103a to the discharge end 103b. The inner diameter of the first straight section 102b remains constant, and its inner diameter is consistent with the minimum inner diameter of the first variable-diameter section 102a. The inner diameter of the second variable-diameter section 102a gradually decreases from the feed end 103a to the discharge end 103b, and its maximum inner diameter is consistent with the inner diameter of the first straight section 102b. The inner diameter of the second straight section 102d remains constant, and its inner diameter is consistent with the minimum inner diameter of the second variable-diameter section 102a. The length of the first straight section 102b along the axial direction of the nozzle tip 100 is greater than the length of the second straight section 102d along the axial direction of the nozzle tip 100.

[0039] In this way, the plastic fluid flowing in the first flow channel 103 can be transferred to a smaller gate, ensuring the stability of the plastic fluid during its flow in the first flow channel 103.

[0040] It should be noted that the wall thickness of each section of the wear-resistant inner tube 102 is the same, that is, the wall thickness of the first variable diameter section 102a, the first straight section 102b, the second variable diameter section 102c, and the second straight section 102d is the same, thereby ensuring the overall wear resistance and corrosion resistance of the nozzle tip 100 and improving the durability of the nozzle tip 100.

[0041] The connection position of the boss portion 101a and the connecting portion 101b corresponds to the segment where the first variable diameter portion 102a is located. The connection position of the connecting portion 101b and the lower end portion 101c corresponds to the segment where the first straight portion 102b is located.

[0042] Reference Figure 4 and Figure 5 The present invention also provides a hot nozzle assembly, which includes a hot nozzle 200 and the aforementioned nozzle tip 100, wherein the hot nozzle 200 has a second flow channel 201. The nozzle tip 100 is connected to the hot nozzle 200 so that the first flow channel 103 and the second flow channel 201 are connected.

[0043] The hot nozzle assembly also includes a fixing sleeve 300 for fixing the nozzle tip 100 within the hot nozzle 200, the fixing sleeve 300 being disposed on the outer side of the nozzle tip 100. A limiting portion 202 is provided within the hot nozzle 200, the upper end face of the protrusion portion 101a abuts against the limiting portion 202, and the top end of the fixing sleeve 300 abuts against the lower end face of the protrusion portion 101a. That is, the protrusion portion 101a is located between the limiting portion 202 and the fixing sleeve 300, thereby confining the nozzle tip 100 within the hot nozzle 200.

[0044] The fixing sleeve 300 includes a first fixing part 301 and a second fixing part 302 connected to the first fixing part 301. The first fixing part 301 is located outside the connecting part 101b, and the second fixing part 302 is located outside the lower end part 101c. The fixing sleeve 300 also serves as a guide to guide the assembly of the nozzle tip 100.

[0045] It is understood that the fixing sleeve 300 extends from the boss portion 101a along the axial direction of the tip 100, and the top end of the first fixing portion 301 abuts against the lower end face of the boss portion 101a, that is, against the abutting surface. The length of the first fixing portion 301 is the same as the length of the connecting portion 101b.

[0046] The outer wall of the first fixing part 301 is threaded to connect with the hot nozzle 200, thereby fixing the nozzle tip 100 inside the hot nozzle 200. The inner wall of the first fixing part 301 fits against the connecting part 101b, thereby ensuring the stability of the nozzle tip 100 after assembly. A clearance 400 is provided between the second fixing part 302 and the lower end part 101c.

[0047] In summary, by setting the nozzle tip 100 as a two-layer integrated structure consisting of the heat-conducting outer tube 101 and the wear-resistant inner tube 102, the nozzle tip 100 has both high thermal conductivity and excellent wear resistance and corrosion resistance, thus ensuring the fluidity and molding quality of the plastic fluid.

[0048] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A beak tip (100), characterized in that, include: Heat-conducting outer tube (101); A wear-resistant inner tube (102) is fitted inside the heat-conducting outer tube (101), and a first flow channel (103) is provided inside the wear-resistant inner tube (102); The wall thickness of the wear-resistant inner tube (102) is less than that of the heat-conducting outer tube (101).

2. The mouth tip (100) according to claim 1, characterized in that: The outer heat-conducting tube (101) is made of copper, and the inner wear-resistant tube (102) is made of steel.

3. The mouth tip (100) according to claim 1, characterized in that: The wall thickness of the wear-resistant inner tube (102) is 0.1 mm to 1 mm.

4. The mouth tip (100) according to claim 1, characterized in that: The heat-conducting outer tube (101) and the wear-resistant inner tube (102) are interference-fitted.

5. The beak tip (100) according to any one of claims 1 to 4, characterized in that: The heat-conducting outer tube (101) includes a boss portion (101a) and a connecting portion (101b) connected to the boss portion (101a). The outer diameter of the boss portion (101a) is larger than the outer diameter of the connecting portion (101b). A bearing surface is formed at the connection position between the boss portion (101a) and the connecting portion (101b).

6. The mouth tip (100) according to claim 5, characterized in that: The heat-conducting outer tube (101) also includes a lower end portion (101c) located at the end of the connecting portion (101b) away from the boss portion (101a), and the outer diameter of the connecting portion (101b) is larger than the outer diameter of the lower end portion (101c).

7. The beak tip (100) according to any one of claims 1 to 4, characterized in that: From the feed end (103a) to the discharge end (103b) of the first flow channel (103), the wear-resistant inner tube (102) includes a first variable diameter section (102a), a first straight section (102b), a second variable diameter section (102c), and a second straight section (102d) connected in sequence. From the feed end (103a) to the discharge end (103b), the inner diameter of the first variable diameter section (102a) and the second variable diameter section (102c) gradually decreases. The wall thickness of each section of the wear-resistant inner tube (102) is the same.

8. A hot nozzle assembly, characterized in that: Includes a hot nozzle (200) and a nozzle tip (100) as claimed in any one of claims 1-7, wherein the hot nozzle (200) has a second flow channel (201) therein, and the nozzle tip (100) is connected to the hot nozzle (200) to connect the first flow channel (103) and the second flow channel (201).

9. The hot nozzle assembly according to claim 8, characterized in that: It also includes a fixing sleeve (300) for fixing the nozzle tip (100) inside the hot nozzle (200), the fixing sleeve (300) being disposed on the outside of the nozzle tip (100), and the fixing sleeve (300) abutting against the boss portion (101a) of the heat-conducting outer tube (101).

10. The hot nozzle assembly according to claim 9, characterized in that: The fixing sleeve (300) includes a first fixing part (301) and a second fixing part (302) connected to the first fixing part (301). The first fixing part (301) is located outside the connecting part (101b) of the heat-conducting outer tube (101), and the second fixing part (302) is located outside the lower end (101c) of the heat-conducting outer tube (101). The first fixing part (301) is provided with threads to connect with the hot nozzle (200), and a clearance (400) is provided between the second fixing part (302) and the lower end (101c).

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