Sprue bush

Abstract

The utility model discloses a sprue bush which comprises a sprue bush body formed through 3D printing, a through fluid cavity is formed in the sprue bush body, a glue inlet and a glue passing opening are formed in the two ends of the fluid cavity respectively, a sprue insert is embedded in the glue passing opening of the sprue bush body, and a glue outlet channel is formed in the sprue insert. The head end of the glue outlet channel is communicated with the fluid cavity through the glue passing opening, the tail end of the glue outlet channel is a glue outlet, and the sprue insert is an SKH53 steel sprue insert. According to the utility model, the hardness and the wear resistance of the sprue insert are higher than those of the sprue bush main body, so that the sprue bush can be produced for at least 50,000 mold times, the sprue insert is not easy to wear at the glue outlet and cannot be used, the service life is prolonged, meanwhile, the cooling effect is ensured, the hot runner needle valve sealing glue can be sealed, and the production efficiency is improved. And the problem of burrs is prevented, the die repairing cost can be greatly saved, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a sprue sleeve. Background Art

[0002] The plastic injection molding process requires cooling the gate. Due to the difficulties in traditional cooling water channel processing, 3D printing technology can be used to solve the processing problem of cooling water channels. However, the wear resistance of the steel material currently used in 3D printing is not ideal and cannot meet the requirements of a long service life. After 2,000 molds are produced, the gate sleeve will be severely worn at the outlet and cannot be used. The hot runner needle valve seal cannot be sealed, resulting in burrs. Utility Model Content

[0003] The utility model aims to provide a sprue sleeve to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a gate sleeve, comprising a gate sleeve main body formed by 3D printing, a through fluid cavity formed in the gate sleeve main body, the two ends of the fluid cavity are a glue inlet and a glue outlet respectively, a gate insert is inlaid at the glue outlet of the gate sleeve main body, a glue outlet channel is formed in the gate insert, the head end of the glue outlet channel is connected to the fluid cavity through the glue outlet, the end of the glue outlet channel is the glue outlet, and the gate insert is an SKH53 steel gate insert.

[0005] Preferably, the surface of the gate insert is plated with a chromium aluminum coating.

[0006] Preferably, the sprue sleeve body is an S136 steel sprue sleeve body.

[0007] Preferably, a cooling water channel is formed inside the sprue sleeve body by 3D printing, and the cooling water channel extends from the glue inlet toward the glue outlet.

[0008] Preferably, there are two cooling water channels, which are arranged on two sides of the fluid cavity opposite to each other.

[0009] Preferably, the glue outlet channel includes a first glue outlet channel, a second glue outlet channel, and a third glue outlet channel which are coaxially arranged and whose diameters gradually decrease along the glue outlet direction. The first glue outlet channel and the second glue outlet channel are both truncated cone-shaped, and the third glue outlet channel is cylindrical.

[0010] Preferably, a first groove is formed inwardly at the gate sleeve body corresponding to the glue outlet, and second grooves are respectively provided on both sides of the length direction of the first groove. The depression depth of the first groove is greater than the depression depth of the second groove. The gate insert includes a first inlay portion and a second inlay portion located on both sides of the length direction of the first inlay portion. The first inlay portion is inlaid in the first groove, and the second inlay portion is inlaid in the second groove, so that the surface of the gate sleeve body and the surface of the gate insert have a smooth transition.

[0011] Preferably, the middle portion of the first inlay portion protrudes outward to form a first annular boss, the middle portion of the first annular boss protrudes outward to form a second annular boss, and the diameter of the first annular boss is greater than that of the second annular boss.

[0012] The utility model has the following beneficial effects:

[0013] The utility model includes a sprue sleeve main body formed by 3D printing, a through fluid cavity is formed in the sprue sleeve main body, the two ends of the fluid cavity are respectively a glue inlet and a glue outlet, a sprue insert is inlaid at the glue outlet of the sprue sleeve main body, a glue outlet channel is formed in the sprue insert, the head end of the glue outlet channel is connected with the fluid cavity through the glue outlet, the end of the glue outlet channel is the glue outlet, the sprue insert is an SKH53 steel sprue insert, this arrangement makes the hardness and wear resistance of the sprue insert higher than the sprue sleeve main body, so that the sprue sleeve can be produced for at least 50,000 molds, and the sprue insert is not easily worn at the glue outlet, resulting in unusability, thereby extending the service life, while ensuring the cooling effect, and can seal the hot runner needle valve to prevent burrs, and can greatly save mold repair costs and save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an outside perspective view of an embodiment of the present invention.

[0015] Figure 2 This is an inside perspective view of an embodiment of the present invention.

[0016] Figure 3 It is an exploded schematic diagram of an embodiment of the present utility model.

[0017] Figure 4 It is a cross-sectional view of an embodiment of the present utility model.

[0018] The accompanying drawings are marked: 1. Gate sleeve body, 11. First groove, 12. Second groove, 2. Fluid cavity, 21. Glue inlet, 22. Glue outlet, 3. Gate insert, 31. First inlay portion, 32. Second inlay portion, 33. First annular boss, 34. Second annular boss, 4. First glue outlet channel, 5. Second glue outlet channel, 6. Third glue outlet channel, 7. Cooling water channel. DETAILED DESCRIPTION

[0019] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0020] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] See Figure 1-4 As shown, as an embodiment of the present invention, a gate sleeve is provided, including a gate sleeve body 1 formed by 3D printing, the gate sleeve body 1 is an S136 steel gate sleeve body, a through fluid cavity 2 is formed in the gate sleeve body 1, the two ends of the fluid cavity 2 are respectively a glue inlet 21 and a glue outlet 22, a gate insert 3 is embedded in the glue outlet 22 of the gate sleeve body 1, a glue outlet channel is formed in the gate insert 3, the head end of the glue outlet channel is connected to the fluid cavity 2 through the glue outlet 22, the end of the glue outlet channel is the glue outlet, and the gate insert 3 is SK H53 steel gate insert, among which S136 steel is a chromium-nickel-molybdenum-vanadium alloy steel, and SKH53 is a tungsten-molybdenum general-purpose high-speed steel. This setting makes the hardness and wear resistance of the gate insert 3 higher than the gate sleeve body 1, so that the gate sleeve can be produced for at least 50,000 molds. The gate insert 3 is not easily worn at the glue outlet and thus cannot be used, thereby extending the service life. At the same time, the cooling effect is guaranteed, and the hot runner needle valve can be sealed to prevent burrs. It can also greatly save mold repair costs and save production costs.

[0023] In this embodiment, the surface of the gate insert 3 is plated with a chromium-aluminum coating, which further improves the hardness and wear resistance, high temperature resistance, and corrosion resistance of the gate insert 3, thereby extending the service life.

[0024] In this embodiment, a cooling water channel 7 is formed inside the gate sleeve body 1 by 3D printing. The cooling water channel 7 extends from the glue inlet 21 toward the glue outlet 22. There are two cooling water channels 7. The two cooling water channels 7 are relatively arranged on both sides of the fluid cavity 2 to further ensure the cooling effect of the gate sleeve.

[0025] In this embodiment, the gate sleeve main body 1 is concavely formed with a first groove 11 at the position corresponding to the glue outlet 22, and second grooves 12 are respectively provided on both sides of the length direction of the first groove 11. The depression depth of the first groove 11 is greater than the depression depth of the second groove 12. The gate insert 3 includes a first inlay portion 31 and a second inlay portion 32 located on both sides of the length direction of the first inlay portion 31. The first inlay portion 31 is inlaid in the first groove 11, and the second inlay portion 32 is inlaid in the second groove 12, so that the surface of the gate sleeve main body 1 and the surface of the gate insert 3 have a smooth transition, thereby ensuring the inlay stability and aesthetics of the gate insert 3 on the gate sleeve main body 1.

[0026] In this embodiment, the middle part of the first inlaid portion 31 protrudes outward to form a first annular boss 33, and the middle part of the first annular boss 33 protrudes outward to form a second annular boss 34. The diameter of the first annular boss 33 is greater than the diameter of the second annular boss 34. The glue outlet channel includes a first glue outlet channel 4, a second glue outlet channel 5, and a third glue outlet channel 6 which are coaxially arranged and gradually decrease in diameter along the glue outlet direction. The first glue outlet channel 4 and the second glue outlet channel 5 are both truncated cone-shaped, and the third glue outlet channel 6 is cylindrical. This arrangement can ensure the structural stability of the gate insert 3, and thus ensure the stability of the glue outlet.

[0027] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A sprue bushing, characterized by: It includes a sprue sleeve main body formed by 3D printing, with a through fluid cavity formed in the sprue sleeve main body, the two ends of the fluid cavity are a glue inlet and a glue outlet respectively, a sprue insert is inlaid at the glue outlet of the sprue sleeve main body, a glue discharge channel is formed in the sprue insert, the head end of the glue discharge channel is connected with the fluid cavity through the glue outlet, the end of the glue discharge channel is the glue outlet, and the sprue insert is an SKH53 steel sprue insert.

2. The sprue bushing according to claim 1, characterized in that: The surface of the gate insert is plated with chrome aluminum coating.

3. The sprue bushing according to claim 1, characterized in that: The main body of the gate sleeve is made of S136 steel.

4. The sprue bushing according to claim 1, characterized in that: A cooling water channel is formed inside the main body of the sprue sleeve through 3D printing, and the cooling water channel extends from the glue inlet toward the glue outlet.

5. The sprue bushing according to claim 4, characterized in that: There are two cooling water channels, which are arranged oppositely on both sides of the fluid cavity.

6. The sprue bushing according to claim 1, characterized in that: The glue outlet channel includes a first glue outlet channel, a second glue outlet channel, and a third glue outlet channel which are coaxially arranged and whose diameters gradually decrease along the glue outlet direction. The first glue outlet channel and the second glue outlet channel are both truncated cone-shaped, and the third glue outlet channel is cylindrical.

7. The sprue bushing according to claim 1, characterized in that: A first groove is formed inwardly at the gate sleeve body corresponding to the glue outlet, and second grooves are respectively provided on both sides of the length direction of the first groove. The depression depth of the first groove is greater than the depression depth of the second groove. The gate insert includes a first inlay portion and a second inlay portion located on both sides of the length direction of the first inlay portion. The first inlay portion is inlaid in the first groove, and the second inlay portion is inlaid in the second groove, so that the surface of the gate sleeve body and the surface of the gate insert have a smooth transition.

8. The sprue bushing according to claim 7, characterized in that: The middle portion of the first inlay portion protrudes outward to form a first annular boss, and the middle portion of the first annular boss protrudes outward to form a second annular boss. The diameter of the first annular boss is greater than that of the second annular boss.

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