Sprue bush for 3D printing

Abstract

The utility model relates to the technical field of sprue bushes, in particular to a sprue bush for 3D printing. Comprising a sprue bush body, a runner for molten materials to flow through is axially formed in the center of the sprue bush body in a penetrating mode, and a cooling water channel is arranged around the runner; the cooling water channel comprises a water inlet spiral water channel and a water outlet spiral water channel which are communicated with each other; one end, far away from the water outlet spiral water channel, of the water inlet spiral water channel is communicated with a water inlet water channel of the mold through an inlet water channel; one end, far away from the water inlet spiral water channel, of the water outlet spiral water channel is communicated with a water outlet water channel of the mold through an outlet water channel. The radial sections of the water inlet spiral water channel and the water outlet spiral water channel are rectangular, and the radial sections of the inlet water channel and the outlet water channel are circular; according to the cooling water channel, cooling water flows in the pipeline in a rotating mode, the turbulence degree of the cooling water can be increased through the design, and therefore the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sprue bush technical field, especially 3D printing's sprue bush. BACKGROUND

[0002] Sprue bush is also called as a nozzle, a pouring nozzle, a sprue pouring, is the flow channel component that lets the molten plastic material from the nozzle of injection molding machine injects to the inside of the mold, is used for connecting the metal fittings of forming mold and injection molding machine, because sprue bush directly contacts high temperature molten plastic, if not cooling, can cause the following problems: 1, sprue bush is easy to overheat under high temperature, causes its material performance to drop, even occurs deformation or damage, this not only can influence the service life of mold, also can influence the quality of injection molding product.

[0003] In prior art, for the cooling of mold sprue bush, generally, straight line type cooling water channel that goes around the mold sprue is arranged in the inside of sprue bush, and the cooling water channel includes longitudinal channel, oblique channel and the like, the main defect of straight line type cooling water channel is that the cooling effect is poor, because the heat transfer efficiency is low when cooling water flows in straight line water channel, leading to the slow cooling speed of sprue bush, the present application provides a kind of 3D printing's sprue bush to solve the problems in prior art. SUMMARY

[0004] The utility model aims at providing a kind of 3D printing's sprue bush, to solve the problems of slow cooling speed of sprue bush and poor cooling effect in prior art.

[0005] The technical scheme of the utility model is: a kind of 3D printing's sprue bush, including sprue bush body, the center axis of the sprue bush body is passed and is provided with the flow channel for molten material to flow, and cooling water channel is arranged around flow channel;The cooling water channel includes the water inlet spiral water channel and the water outlet spiral water channel that are interconnected;The water inlet spiral water channel is communicated with the water inlet water channel of mold by inlet water channel at one end away from the water outlet spiral water channel, and the water outlet spiral water channel is communicated with the water outlet water channel of mold by outlet water channel at one end away from the water inlet spiral water channel.

[0006] Preferably, the radial section of the water inlet spiral water channel and the water outlet spiral water channel is rectangular, and the radial section of the inlet water channel and the outlet water channel is circular.

[0007] Preferably, the water inlet spiral water channel and the water outlet spiral water channel are connected by an annular water channel, and the radial section of the annular water channel is rectangular.

[0008] Preferably, the nozzle sleeve body comprises coaxially connected first and second columns, the diameter of the first column is larger than that of the second column; the flow channel penetrates through the first and second columns, and the water inlet and outlet spiral channels are distributed in the first and second columns.

[0009] Preferably, the inlet water channel is L-shaped, the port at one end of the inlet water channel is connected with the port of the water inlet spiral channel, and the port at the other end is located at the lower end face of the first column.

[0010] The outlet water channel is L-shaped, the port at one end of the outlet water channel is connected with the port of the water outlet spiral channel, and the port at the other end is located at the lower end face of the first column.

[0011] Preferably, a bolt hole for fixing the nozzle sleeve is provided in the interior vertical tube of the first column.

[0012] Preferably, the flow channel comprises a columnar main flow channel and a branch flow channel located at the lower end of the main flow channel, the diameter of the main flow channel gradually increases from top to bottom, and the branch flow channel comprises a plurality of branch flow channel units uniformly distributed along the radial direction of the main flow channel.

[0013] Preferably, the first column is provided with a vertical section for positioning the mounting direction of the nozzle sleeve on the mold.

[0014] Preferably, a spherical surface is concavely provided at the top port of the main flow channel in the first column.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] (1) the utility model discloses a 3D printing nozzle sleeve, which comprises a nozzle sleeve body, a flow channel is provided in the center axis of the nozzle sleeve body for flowing molten material, and a cooling water channel is arranged around the flow channel; the cooling water channel comprises an inlet spiral water channel and an outlet spiral water channel which are communicated with each other; one end of the inlet spiral water channel away from the outlet spiral water channel is communicated with the water inlet channel of the mold through an inlet water channel, and one end of the outlet spiral water channel away from the inlet spiral water channel is communicated with the water outlet channel of the mold through an outlet water channel; the spiral water channel design makes the cooling water form a rotating flow in the pipeline, which can increase the turbulent degree of the cooling water, thereby improving the heat exchange efficiency; the linear water channel in the prior art is simple in design, the cooling water linearly flows in the pipeline without rotation or turbulence, and therefore the cooling effect is relatively low.

[0017] (2) The radial section of the water inlet spiral water channel and the water outlet spiral water channel is rectangular, compared with the circular radial section in the prior art, on the one hand, the flat water inlet spiral water channel and the water outlet spiral water channel can make the effective area of the water channel larger and the cooling effect better, on the other hand, due to the limited size of the sprue bush, the flat water inlet spiral water channel and the water outlet spiral water channel can be farther away from the main flow channel than the circular water channel in the prior art, so that the water leakage between the water inlet spiral water channel and the water outlet spiral water channel and the main flow channel is avoided, and the service life of the sprue bush is longer. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be described further in connection with the drawings and embodiments:

[0019] Figure 1 It is a top view structure schematic view of the sprue bush of 3D printing described in the embodiment;

[0020] Figure 2 It is a bottom view structure schematic view of the sprue bush of 3D printing described in the embodiment;

[0021] Figure 3 It is a perspective structure schematic view of the sprue bush of 3D printing described in the embodiment;

[0022] Figure 4 It is a structure schematic view of the cooling water channel of the sprue bush of 3D printing described in the embodiment.

[0023] Wherein: 1, cooling water channel, 2, water inlet spiral water channel, 3, water outlet spiral water channel, 4, inlet water channel, 5, outlet water channel, 6, annular water channel, 7, first cylinder, 8, second cylinder, 9, bolt hole, 10, main flow channel, 11, branch flow channel, 12, positioning vertical section, 13, spherical surface. DETAILED DESCRIPTION

[0024] The content of the utility model will be described in further detail in connection with specific embodiments:

[0025] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0026] As Figure 1 ,Figure 2 As shown, a 3D printed sprue bushing includes: a sprue bushing body, with a flow channel through which molten material flows through the central axis of the sprue bushing body, and a cooling water channel 1 arranged around the flow channel; the cooling water channel 1 includes an inlet spiral water channel 2 and an outlet spiral water channel 3 that are interconnected; the end of the inlet spiral water channel 2 away from the outlet spiral water channel 3 is connected to the inlet water channel of the mold through an inlet water channel 4, and the end of the outlet spiral water channel 3 away from the inlet spiral water channel 2 is connected to the outlet water channel of the mold through an outlet water channel 5.

[0027] The radial cross-sections of the inlet spiral channel 2 and the outlet spiral channel 3 are rectangular, while the radial cross-sections of the inlet channel 4 and the outlet channel 5 are circular. Firstly, the spiral channel can be arranged around the flow channel, covering a larger area than the straight channels in the prior art, resulting in better cooling of the gating sleeve. Secondly, the spiral channel design causes the cooling water to rotate within the pipe, increasing turbulence and thus improving heat exchange efficiency. In contrast, the straight channel design in the prior art is simple, with cooling water flowing linearly without rotation or turbulence, resulting in relatively lower cooling efficiency. In addition, in this invention, the radial cross-section of the inlet spiral channel 2 and the outlet spiral channel 3 is rectangular, compared to the circular radial cross-section in the prior art. On the one hand, the flat inlet spiral channel 2 and the outlet spiral channel 3 can have a larger effective area and better cooling effect. On the other hand, due to the limited size of the sprue sleeve, the flat inlet spiral channel 2 and the outlet spiral channel 3 can be further away from the main channel 10 than the circular channel in the prior art, and there will be no leakage between the inlet spiral channel 2 and the outlet spiral channel 3 and the main channel 10. The service life of the sprue sleeve is also longer.

[0028] like Figure 4 As shown, the inlet spiral channel 2 and the outlet spiral channel 3 are connected by an annular channel 6. The radial cross-section of the annular channel 6 is rectangular, and the rectangular cross-section of the annular channel 6 is the same as that of the inlet spiral channel 2 and the outlet spiral channel 3, which facilitates the smooth flow of cooling water. At the same time, the annular channel 6 acts as a buffer for the cooling water entering the outlet spiral channel 3 from the inlet spiral channel 2, which also facilitates the smooth flow of cooling water. Figure 1 , Figure 2 As shown, the gate sleeve body includes a first column 7 and a second column 8 coaxially connected vertically, with the diameter of the first column 7 being larger than that of the second column 8; as... Figure 3 As shown, the flow channel runs through the first column 7 and the second column 8, with the inlet spiral channel 2 and the outlet spiral channel 3 distributed within the first column 7 and the second column 8. Figure 2 , Figure 4As shown in the drawings, the inlet water channel 4 is L-shaped, and the port at one end of the inlet water channel 4 is connected with the port of the water inlet spiral water channel 2, and the port at the other end is located at the lower end face of the first column 7; the outlet water channel 5 is L-shaped, and the port at one end of the outlet water channel 5 is connected with the port of the water outlet spiral water channel 3, and the port at the other end is located at the lower end face of the first column 7.

[0029] As shown in the drawings, the first column 7 is internally vertically through the bolt hole 9 for fixing the gate bushing. As shown in the drawings, Figure 1 , Figure 2 the flow channel includes the columnar main flow channel 10 and the branch flow channel 11 located at the lower port of the main flow channel 10, the diameter of the main flow channel 10 gradually increases from top to bottom, and the branch flow channel 11 includes a plurality of branch flow channel units uniformly distributed along the radial direction of the main flow channel 10. Figure 3

[0030] The first column 7 is provided with the positioning vertical section 12 for positioning the mounting direction of the gate bushing on the mold. The positioning vertical section 12 is convenient for positioning the mounting direction of the gate bushing on the mold, so that the plurality of branch flow channel units are connected in communication after corresponding to the flow channel in the mold; the first column 7 is internally concave downward at the top port of the main flow channel 10 and is provided with the spherical surface 131 which is matched with the shape of the discharge port of the injection molding machine.

[0031] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.​

Claims

1. A 3D printed sprue bushing, characterized in that, The application relates to a sprue bush body, a flow channel for flowing molten material is arranged in the center of the sprue bush body in an axial direction, and a cooling water channel is arranged around the flow channel; the cooling water channel comprises an inlet spiral water channel and an outlet spiral water channel which are communicated with each other; one end of the inlet spiral water channel far from the outlet spiral water channel is communicated with an inlet water channel of a mold through an inlet water channel, and one end of the outlet spiral water channel far from the inlet spiral water channel is communicated with an outlet water channel of the mold through an outlet water channel. The radial section of the inlet spiral water channel and the outlet spiral water channel is rectangular. The inlet spiral water channel and the outlet spiral water channel are communicated through an annular water channel, and the radial section of the annular water channel is rectangular. The flow channel comprises a cylindrical main flow channel and a branch flow channel located at the lower end of the main flow channel; the diameter of the main flow channel gradually increases from top to bottom; and the branch flow channel comprises a plurality of branch flow channel units which are uniformly distributed along the radial direction of the main flow channel. The radial section of the inlet water channel and the outlet water channel is circular.

2. A 3D printed sprue bushing according to claim 1, characterized in that: The sprue bush body comprises a first column body and a second column body which are coaxially connected in sequence, and the diameter of the first column body is larger than that of the second column body; the flow channel penetrates through the first column body and the second column body, and the inlet spiral water channel and the outlet spiral water channel are arranged in the first column body and the second column body.

3. The 3D printed sprue bushing of claim 1, wherein: The inlet water channel is L-shaped, one end of the inlet water channel is connected with the end of the inlet spiral water channel, and the other end of the inlet water channel is located at the lower end surface of the first column body.

4. The 3D printed sprue bushing of claim 1, wherein: The outlet water channel is L-shaped, one end of the outlet water channel is connected with the end of the outlet spiral water channel, and the other end of the outlet water channel is located at the lower end surface of the first column body. A bolt hole for fixing the sprue bush is vertically arranged in the inner part of the first column body.

5. A 3D printed sprue bushing according to claim 3, characterized in that: The first column body is provided with a positioning vertical section for positioning the installation direction of the sprue bush on the mold.

6. A 3D printed sprue bushing according to claim 3, characterized in that: A spherical surface is concavely arranged in the top part of the first column body.

7. A 3D printed sprue bushing according to claim 3, characterized in that: ​

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