Nozzle

Abstract

The utility model discloses a nozzle, and belongs to the technical field of 3D printing. The nozzle comprises a nozzle body and further comprises a core column with at least two channels, the core column is arranged in the nozzle body, a first heat conduction face used for exchanging heat with the outside is formed on the outer wall of the core column, a second heat conduction face is formed on the inner wall of each channel, and the first heat conduction face and the second heat conduction face are matched with each other. The core column with the multiple groups of channel structures is arranged in the nozzle main body, so that a larger heating area is formed in the nozzle main body, after the core column and the nozzle main body are assembled, multiple hole channels are formed, the internal surface area of the nozzle main body is greatly increased, the heating area of materials is also greatly increased, consumables are better heated, and the service life of the materials is prolonged. And the volume of consumables flowing through the nozzle in unit time is increased, so that the nozzle flow is increased.

Description

Technical Field

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

[0002] 3D printers have become very popular over the past few years. Printers used to be large and very expensive, but now they are very small and affordable for the average consumer.

[0003] The printer works by melting a plastic filament and forcing it to flow out of a hole in the printer nozzle. The plastic material becomes solid after leaving the nozzle of the printer, thus printing a three-dimensional object. The nozzle is made of metal and is usually hollow cylindrical. Since the outside of the nozzle is threaded, it can be screwed into the heating block connected to the printer. There are heating rods installed on the heating block. The heating block and the nozzle are enough to melt the plastic and turn it into liquid. The nozzle and the heating block have a large inlet hole that allows the plastic filament to enter the nozzle and the heating block. There is a small outlet hole at the end of the nozzle, and the liquid plastic flows out through this outlet hole. The size of this outlet hole is usually 0.25 mm-0.8 mm. The size of the outlet hole causes that in order for the filament to flow out smoothly, the nozzle and the heating block must completely melt the plastic material before the filament reaches the outlet hole. Therefore, the speed of printing is a direct result of the ability to melt plastic. So how to increase the speed of plastic melting is a direct result of determining the printing speed. And with the rapid development of the 3D printer industry, people have higher requirements for the printing speed of printers. In order to improve the printing speed of printers, high-flow nozzles came into being. Larger contact surface, better heat, and higher flow meet the needs of high-speed printing.

[0004] The existing single-hole nozzle has a limited heating area when in use. When printing at low speed, the single-hole nozzle can meet the printing needs. However, as the printing speed of the printer becomes faster and faster, the single-hole nozzle can no longer meet the needs. The nozzle flow limits the improvement of the printing performance of high-speed printers. There is an urgent need for high-flow nozzles to cooperate with high-speed printers to improve printer performance. Utility Model Content

[0005] The utility model aims to provide a nozzle to solve the problem in the prior art that the heating area of ​​a single-hole nozzle is limited and the nozzle flow cannot meet the use requirements.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A nozzle comprises a nozzle body and a core column with at least two groups of channels, which is arranged in the nozzle body, and a first heat-conducting surface for exchanging heat with the outside is formed on the outer wall of the core column, and a second heat-conducting surface is formed on the inner wall of the channel, and the first heat-conducting surface and the second heat-conducting surface cooperate with each other.

[0008] In order to facilitate processing and heat transfer between the first heat conducting surface and the second heat conducting surface, preferably, the first heat conducting surface and the second heat conducting surface intersect.

[0009] In order to simplify the structure and improve the processing efficiency, further, the cross-section of the reinforcing rib between the first heat conducting surface and the second heat conducting surface is arc-shaped.

[0010] In order to increase the heated area and improve the heat conduction efficiency, further, the cross-section of the reinforcing rib between the first heat conduction surface and the second heat conduction surface is rectangular.

[0011] Preferably, the first heat conducting surface and the second heat conducting surface are both closed surfaces.

[0012] Compared with the prior art, the utility model provides a nozzle having the following beneficial effects:

[0013] 1. The nozzle has a larger heating area in the nozzle body by installing a core column with multiple sets of channel structures in the nozzle body. After the core column and the nozzle body are assembled, multiple channels are formed, and the surface area inside the nozzle body is greatly increased. The heating area of ​​the material is also greatly increased, so that the consumables are better heated, and the volume of consumables flowing through the nozzle per unit time is increased, thereby increasing the nozzle flow rate;

[0014] 2. The nozzle, by designing the channel structure on the core column into different shapes, can be selected according to production capacity and usage occasions, thereby improving selectivity and meeting different application scenarios.

[0015] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The utility model installs a core column with multiple sets of channel structures in the nozzle body to provide a larger heating area in the nozzle body. After the core column and the nozzle body are assembled, multiple channels are formed, and the surface area inside the nozzle body is greatly improved. The heating area of ​​the material is also greatly improved, so as to better heat the consumables and increase the volume of the consumables flowing through the nozzle per unit time, thereby increasing the nozzle flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a nozzle proposed by the utility model Figure 1 ;

[0017] Figure 2 A schematic diagram of the structure of a nozzle proposed by the utility model Figure 2 ;

[0018] Figure 3 A schematic diagram of the structure of a nozzle proposed by the utility model Figure 3 ;

[0019] Figure 4 This is a structural schematic diagram of a nozzle core column proposed by the utility model;

[0020] Figure 5 A schematic diagram of a nozzle core column proposed in the utility model Figure 1 ;

[0021] Figure 6 A schematic diagram of a nozzle core column proposed in the utility model Figure 2 ;

[0022] Figure 7 A schematic diagram of a nozzle core column proposed in the utility model Figure 3 ;

[0023] Figure 8 A schematic diagram of a nozzle core column proposed in the utility model Figure 4 .

[0024] In the figure: 1, nozzle body; 2, core column; 201, first heat-conducting surface; 202, second heat-conducting surface. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] Embodiment 1:

[0028] Reference Figure 1-Figure 6A nozzle includes a nozzle body 1, an outlet hole is formed at one end of the nozzle body 1, and an inlet hole is formed at the other end, the diameter of the inlet hole is larger than the diameter of the outlet hole, and a thread is fixedly provided on the outer wall of the nozzle body 1 to facilitate the connection between the nozzle and the heating block, and a hexagonal plate is also fixedly provided on the nozzle body 1 to further facilitate the assembly and disassembly of the nozzle body 1 and improve the use effect. The nozzle body 1 further comprises a core column 2 having at least two groups of channels, wherein the channels are arranged in two to ten groups, preferably three groups, and the core column 2 is slidably arranged in the nozzle body 1, that is, the core column 2 is slidably arranged in the inlet hole, and the outer wall of the core column 2 is against the inner wall of the inlet hole, and the material of the core column 2 is copper or aluminum, or other materials. Here, we prefer copper, which is an excellent thermal conductive material with very high thermal conductivity and can quickly transfer heat. In addition, a first thermal conductive surface 201 for exchanging heat with the outside world is formed on the outer wall of the core column 2, that is, the first thermal conductive surface 201 is against the inner wall of the inlet hole, and the heat of the nozzle body 1 can be transferred to the core column 2 through the first thermal conductive surface 201, that is, to the second thermal conductive surface 20 2, a second heat-conducting surface 202 is formed on the inner wall of the channel, and the first heat-conducting surface 201 and the second heat-conducting surface 202 cooperate with each other. After the heat is transferred to the second heat-conducting surface 202, the second heat-conducting surface 202 can transfer the heat to the plastic solution, thereby improving the heating effect and simultaneously improving the fluidity of the plastic solution. When in use, by installing the core column 2 with multiple sets of channel structures in the nozzle body 1, the nozzle body 1 has a larger heating area. After the core column 2 and the nozzle body 1 are assembled, multiple channels are formed, and the surface area inside the nozzle body 1 is greatly improved. The heating area of ​​the material is also greatly improved, so that the consumables are better heated, and the volume of the consumables flowing through the nozzle per unit time is increased, thereby improving the nozzle flow rate.

[0029] Reference Figure 4-Figure 6 The first heat conducting surface 201 and the second heat conducting surface 202 intersect, that is, the channel is an open structure, during the processing, the removal of the core column 2 material can be reduced, and the processing efficiency can be improved.

[0030] Embodiment 2:

[0031] Reference Figure 5 and Figure 6 , which is basically the same as the first embodiment. On the basis of the first embodiment, we describe the reinforcing ribs between the first heat conducting surface 201 and the second heat conducting surface 202 in detail. Here, we design the cross section of the reinforcing ribs between the first heat conducting surface 201 and the second heat conducting surface 202 to be arc-shaped. When in use, by designing the reinforcing ribs to be arc-shaped, the structure is simple, the connection strength is large, and the processing is convenient, which is suitable for mass production and improves the use effect.

[0032] Embodiment three:

[0033] Reference Figure 7 , which is basically the same as embodiment 1, on the basis of embodiments 1 and 2, we further subdivide the reinforcing ribs. Here, we design the cross section of the reinforcing ribs between the first heat conducting surface 201 and the second heat conducting surface 202 as a rectangle. When in use, by designing the reinforcing ribs as a rectangle, not only the flow area of ​​the channel can be appropriately increased, but also the heat conducting area of ​​the first heat conducting surface 201 and the second heat conducting surface 202 can be increased, thereby improving the heating effect.

[0034] Embodiment 4:

[0035] Reference Figure 8 , which is basically the same as the first embodiment. On the basis of the first embodiment, we design the first heat-conducting surface 201 and the second heat-conducting surface 202 as closed surfaces, that is, the outer wall of the first core column 2 is wrapped by the first heat-conducting surface 201, and the channel is a closed structure with openings at both ends. At this time, the inner walls of the channel are the second heat-conducting surface 202. During use, the fully surrounded first heat-conducting surface 201 can transfer external heat through the core column 2 to the second heat-conducting surface 202 to the maximum extent, so as to heat the inside of the consumables. In addition, the heating area of ​​the second heat-conducting surface 202 is increased, which can further improve the heating effect on the consumables.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A nozzle, comprising a nozzle body (1), characterized in that: It also comprises a core column (2) with at least two groups of channels, which is arranged in the nozzle body (1), and a first heat-conducting surface (201) for exchanging heat with the outside is formed on the outer wall of the core column (2), and a second heat-conducting surface (202) is formed on the inner wall of the channel, and the first heat-conducting surface (201) and the second heat-conducting surface (202) cooperate with each other.

2. A nozzle according to claim 1, characterized in that: The first heat conducting surface (201) and the second heat conducting surface (202) intersect.

3. A nozzle according to claim 2, characterized in that: The cross section of the reinforcing rib between the first heat conducting surface (201) and the second heat conducting surface (202) is arc-shaped.

4. A nozzle according to claim 2, characterized in that: The cross section of the reinforcing rib between the first heat conducting surface (201) and the second heat conducting surface (202) is rectangular.

5. A nozzle according to claim 1, characterized in that: The first heat-conducting surface (201) and the second heat-conducting surface (202) are both closed surfaces.

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