Printing head nozzle device of 3D printer

Abstract

The utility model discloses a nozzle device for a printing head of a 3D printer. The nozzle device comprises a throat pipe, a heating block, a nozzle, a temperature measuring sensor, a ceramic heating sheet and an elastic clamping ring, the throat pipe is provided with a first channel through which consumables pass; the nozzle is provided with a second channel for the consumable to pass through; the throat pipe is provided with a connecting part, the heating block is provided with a convex cavity, the throat pipe is arranged at the first end of the heating block, and the connecting part is in interference connection with the convex cavity; the nozzle is arranged at the second end of the heating block and is in threaded connection with the convex cavity; the end face of the nozzle can be in butt joint with the end face of the throat pipe, and during butt joint, the first channel and the second channel are coaxial and communicate. The temperature measuring sensor is arranged on the heating block; the ceramic heating piece is detachably arranged on the heating block through the elastic clamping ring. According to the utility model, the throat pipe and the heating block can form a stable whole, the relative position is not influenced by the disassembly of the nozzle, and the nozzle can be conveniently replaced and secondarily mounted in the use process of the machine; and the heating rate and the heating efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printing extrusion head consumable melting, and specifically relates to a 3D printer print head nozzle device. Background Art

[0002] 3D printing is the full name of "3Dimensional Printing", which is a kind of additive manufacturing technology based on computer three-dimensional models and controlled by software. 3D printing technology is usually implemented by digital technology printers, such as 3D printers. 3D printers can be used in any industry and are widely used in medicine, construction, automobiles, aerospace and education.

[0003] FDM 3D printing technology stands for "Fused Deposition Modeling", which is a type of 3D printing technology. At present, traditional desktop 3D printers usually adopt FDM molding technology, using prefabricated plastic wires as printing consumables, and then melting and extruding the printed model through a nozzle. With the development of FMD molding technology, most of the traditional throats and nozzles are installed relatively tightly inside the heating block. The nozzles need to be replaced regularly as consumable parts. At this time, if the nozzles are removed alone, the heating block and throat will loosen, causing the position of the heating block to move. When the nozzles are installed for the second time, the end faces of the nozzles and throats cannot be tightly sealed, increasing the risk of leakage.

[0004] In addition, the heat generated by the heating rod in the heating structure is conducted to the nozzle by the heating block, thereby heating the printing material inside the nozzle to achieve the purpose of melting the printing material. However, the traditional heating rod heating has the problems of slow heating rate, low heating efficiency, difficult disassembly and assembly, complex structure, and high overall quality. At present, high-speed printing has become the development trend of the industry. To increase the printing speed, it is necessary to increase the melting speed of the nozzle, and it is necessary to increase the heating rate of the heating structure. At this time, the traditional heating structure can no longer meet the high-speed printing requirements of high heating rate and lightweight.

[0005] At present, there is a lack of a new type of 3D printer print head nozzle device to solve the problem that the end face of the nozzle cannot be relatively pressed against the throat in situ during secondary installation, and to solve the problems of slow heating rate and low heating efficiency of traditional heating structures.

[0006] Therefore, a new technology is needed to solve the problem of lack of a new type of 3D printer print head nozzle device in the prior art. Utility Model Content

[0007] In order to solve the above problems in the prior art, the utility model provides a 3D printer print head nozzle device, which can make the throat and the heating block a stable whole, and the relative position is not affected by the disassembly of the nozzle, which is convenient for the replacement and secondary installation of the nozzle during the use of the machine; and the utility model can greatly improve the heating rate and heating efficiency.

[0008] The utility model adopts the following technical solutions:

[0009] A 3D printer print head nozzle device, comprising a throat, a heating block, a nozzle, a temperature sensor, a ceramic heating sheet and an elastic clamp ring;

[0010] The throat is provided with a first passage for the consumables to pass through; the nozzle is provided with a second passage for the consumables to pass through;

[0011] The throat is provided with a connecting portion, the heating block is provided with a convex cavity, the throat is arranged at the first end of the heating block, and the connecting portion is interference connected with the convex cavity;

[0012] The nozzle is arranged at the second end of the heating block, and the nozzle is threadedly connected to the convex cavity; the end face of the nozzle can be butted against the end face of the throat pipe, and when butted against, the first channel and the second channel are coaxial and connected;

[0013] The temperature sensor is arranged on the heating block;

[0014] The ceramic heating sheet is detachably arranged on the heating block through the elastic clamp ring.

[0015] Further, the connecting portion includes a first shaft portion and a second shaft portion; the first shaft portion is arranged at the lower end of the throat, and the second shaft portion is arranged below the first shaft portion; the outer diameter of the first shaft portion is smaller than the outer diameter of the second shaft portion;

[0016] The convex cavity includes a first cavity and a second cavity; the first cavity is connected to the second cavity, and the first cavity and the second cavity penetrate both ends of the entire heating block; the inner diameter of the first cavity is smaller than the inner diameter of the second cavity;

[0017] Wherein, the first shaft portion is in interference connection with the first cavity; and the second shaft portion is in interference connection with the second cavity.

[0018] Furthermore, the inner wall of the second cavity includes a smooth inner wall and a threaded inner wall; the smooth inner wall is connected to the threaded inner wall; a section of the inner wall close to the first end of the heating block is a smooth inner wall, and a section of the inner wall close to the second end of the heating block is a threaded inner wall.

[0019] Furthermore, the shaft body of the nozzle includes a first shaft body, a second shaft body and a tip shaft body; the first shaft body, the second shaft body and the tip shaft body are connected in sequence; the outer diameter of the first shaft body is smaller than the outer diameter of the second shaft body; the first shaft body includes a smooth shaft body that can cooperate with the inner wall of the smooth section and a threaded shaft body that can be threadedly connected to the inner wall of the threaded section.

[0020] Furthermore, the first shaft body is a cylindrical shaft body; the second shaft body is a hexagonal shaft body or an octagonal shaft body.

[0021] Furthermore, at least one side of the elastic clamp is provided with an inward convex portion; at least one side of the elastic clamp is provided with an outward concave portion; and the inward convex portion and the outward concave portion are not located on the same side of the elastic clamp.

[0022] Furthermore, the ceramic heating sheet is attached to at least one side of the heating block and can be tightly attached to the heating block through the inwardly convex portion of the elastic clamping ring.

[0023] Furthermore, the temperature sensor is arranged on at least one side of the heating block, and the lead wire of the temperature sensor can match the outward concave portion of the elastic clamp tightly clamped on the heating block.

[0024] Furthermore, a slot is provided on at least one side of the heating block for the temperature sensor to enter.

[0025] Furthermore, the slot is close to the second end of the heating block.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] The utility model discloses a 3D printer print head nozzle device, wherein the throat is interference-connected with the convex cavity of the heating block through a connecting portion, so that the throat and the heating block become a stable whole, and the relative position is not affected by the disassembly of the nozzle, which is convenient for the replacement and secondary installation of the nozzle during the use of the machine; in addition, the utility model uses a ceramic heating sheet as the heat source for the molten material, replacing the traditional heating rod, greatly improving the heating rate and heating efficiency; at the same time, the utility model uses an elastic clamp ring to press the ceramic heating sheet tightly onto the heating block, which simplifies the overall structure of the print head nozzle device, reduces the movement inertia of the print head nozzle device, and helps to improve the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0029] Figure 1 It is an exploded view of the nozzle device of the print head of the 3D printer of the utility model;

[0030] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the first-person perspective after assembly;

[0031] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the middle longitudinal section of

[0032] Figure 4 It is a cross-sectional front view of the throat, heating block, and nozzle connection;

[0033] Figure 5 yes Figure 2 A stereoscopic schematic diagram of the second perspective;

[0034] Figure 6 yes Figure 2 A three-dimensional diagram from a third-person perspective.

[0035] Reference numerals:

[0036] 1-throat; 11-first channel; 12-connecting portion; 121-first shaft portion; 122-second shaft portion;

[0037] 2-heating block; A-first end; B-second end; 21-convex cavity; 211-first cavity; 212-second cavity; C-smooth section inner wall; D-threaded section inner wall; 22-slot hole;

[0038] 3-nozzle; 31-second channel; 32-first shaft body; 321-smooth shaft body; 322-threaded shaft body; 33-second shaft body; 34-tip shaft body;

[0039] 4-temperature sensor; 41-lead wire;

[0040] 5-Ceramic heating element;

[0041] 6-elastic clamp; 61-inward convex portion; 62-outward concave portion. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, scheme and effect of the utility model. It should be noted that the embodiments and features in the embodiments in this application can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0043] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the accompanying drawings.

[0044] Reference Figures 1 to 6 , a 3D printer print head nozzle device, comprising a throat 1, a heating block 2, a nozzle 3, a temperature sensor 4, a ceramic heating sheet 5 and an elastic clamp 6;

[0045] The throat 1 is provided with a first passage 11 for the consumables to pass through; the nozzle 3 is provided with a second passage 31 for the consumables to pass through;

[0046] The throat pipe 1 is provided with a connecting portion 12, the heating block 2 is provided with a convex cavity 21, the throat pipe 1 is arranged at the first end A of the heating block 2, and the connecting portion 12 is interference connected with the convex cavity 21;

[0047] The nozzle 3 is arranged at the second end B of the heating block 2, and the nozzle 3 is threadedly connected to the convex cavity 21; the end face of the nozzle 3 can be butted against the end face of the throat 1, and when butted against, the first channel 11 and the second channel 31 are coaxial and connected;

[0048] The temperature sensor 4 is arranged on the heating block 2;

[0049] The ceramic heating plate 5 is detachably arranged on the heating block 2 via the elastic clamp ring 6 .

[0050] Reference Figures 1 to 6 In one embodiment, the connecting portion 12 includes a first shaft portion 121 and a second shaft portion 122; the first shaft portion 121 is disposed at the lower end of the throat 1, and the second shaft portion 122 is disposed below the first shaft portion 121; the outer diameter of the first shaft portion 121 is smaller than the outer diameter of the second shaft portion 122;

[0051] The convex cavity 21 includes a first cavity 211 and a second cavity 212; the first cavity 211 is connected to the second cavity 212, and the first cavity 211 and the second cavity 212 penetrate both ends of the entire heating block 2; the inner diameter of the first cavity 211 is smaller than the inner diameter of the second cavity 212;

[0052] The first shaft portion 121 is connected to the first cavity 211 by interference fit; the second shaft portion 122 is connected to the second cavity 212 by interference fit.

[0053] Reference Figures 1 to 6In one embodiment, the inner wall of the second cavity 212 includes a smooth inner wall C and a threaded inner wall D; the smooth inner wall C is connected to the threaded inner wall D; a section of the inner wall close to the first end A of the heating block 2 is the smooth inner wall C, and a section of the inner wall close to the second end B of the heating block 2 is the threaded inner wall D.

[0054] Reference Figures 1 to 6 In one embodiment, the shaft body of the nozzle 3 includes a first shaft body 32, a second shaft body 33 and a tip shaft body 34; the first shaft body 32, the second shaft body 33 and the tip shaft body 34 are connected in sequence; the outer diameter of the first shaft body 32 is smaller than the outer diameter of the second shaft body 33; the first shaft body 32 includes a smooth shaft body 321 that can cooperate with the inner wall C of the smooth section and a threaded shaft body 322 that can be threadedly connected to the inner wall D of the threaded section.

[0055] Reference Figures 1 to 6 In one embodiment, the first shaft body 32 is a cylindrical shaft body; the second shaft body 33 is a hexagonal shaft body or an octagonal shaft body.

[0056] Reference Figures 1 to 6 In one embodiment, at least one side of the elastic snap ring 6 is provided with an inward convex portion 61; at least one side of the elastic snap ring 6 is provided with an outward concave portion 62; and the inward convex portion 61 and the outward concave portion 62 are not on the same side of the elastic snap ring 6.

[0057] Reference Figures 1 to 6 In one embodiment, the ceramic heating sheet 5 is attached to at least one side of the heating block 2 and can be tightly attached to the heating block 2 through the pressure of the inward protrusion 61 of the elastic clamp 6.

[0058] Reference Figures 1 to 6 In one embodiment, the temperature sensor 4 is disposed on at least one side of the heating block 2, and the lead wire 41 of the temperature sensor 4 can match the outward recess 62 of the elastic clamp tightly clamped on the heating block.

[0059] Reference Figure 1 In one embodiment, a slot 22 is provided on at least one side of the heating block 2 for the temperature sensor 4 to enter.

[0060] Reference Figure 1 In one embodiment, the slot 22 is close to the second end B of the heating block 2 .

[0061] For other contents of the 3D printer print head nozzle device described in the present invention, please refer to the prior art and will not be repeated here.

[0062] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A 3D printer print head nozzle device, characterized in that: It includes a throat, a heating block, a nozzle, a temperature sensor, a ceramic heating sheet and an elastic clamp ring; The throat is provided with a first passage for the consumables to pass through; the nozzle is provided with a second passage for the consumables to pass through; The throat is provided with a connecting portion, the heating block is provided with a convex cavity, the throat is arranged at the first end of the heating block, and the connecting portion is interference connected with the convex cavity; The nozzle is arranged at the second end of the heating block, and the nozzle is threadedly connected to the convex cavity; the end face of the nozzle can be butted against the end face of the throat pipe, and when butted against, the first channel and the second channel are coaxial and connected; The temperature sensor is arranged on the heating block; The ceramic heating sheet is detachably arranged on the heating block through the elastic clamp ring.

2. The 3D printer print head nozzle device according to claim 1, characterized in that: The connecting portion includes a first shaft portion and a second shaft portion; the first shaft portion is arranged at the lower end of the throat, and the second shaft portion is arranged below the first shaft portion; the outer diameter of the first shaft portion is smaller than the outer diameter of the second shaft portion; The convex cavity includes a first cavity and a second cavity; the first cavity is connected to the second cavity, and the first cavity and the second cavity penetrate both ends of the entire heating block; the inner diameter of the first cavity is smaller than the inner diameter of the second cavity; Wherein, the first shaft portion is in interference connection with the first cavity; and the second shaft portion is in interference connection with the second cavity.

3. The 3D printer print head nozzle device according to claim 2, characterized in that: The inner wall of the second cavity includes a smooth inner wall and a threaded inner wall; the smooth inner wall is connected to the threaded inner wall; a section of the inner wall close to the first end of the heating block is a smooth inner wall, and a section of the inner wall close to the second end of the heating block is a threaded inner wall.

4. The 3D printer print head nozzle device according to claim 3, characterized in that: The shaft body of the nozzle includes a first shaft body, a second shaft body and a tip shaft body; the first shaft body, the second shaft body and the tip shaft body are connected in sequence; the outer diameter of the first shaft body is smaller than the outer diameter of the second shaft body; the first shaft body includes a smooth shaft body that can cooperate with the inner wall of the smooth section and a threaded shaft body that can be threadedly connected to the inner wall of the threaded section.

5. The 3D printer print head nozzle device according to claim 4, characterized in that: The first shaft body is a cylindrical shaft body; the second shaft body is a hexagonal shaft body or an octagonal shaft body.

6. The 3D printer print head nozzle device according to claim 1, characterized in that: At least one side of the elastic clamp is provided with an inward convex portion; at least one side of the elastic clamp is provided with an outward concave portion; and the inward convex portion and the outward concave portion are not located on the same side of the elastic clamp.

7. The 3D printer print head nozzle device according to claim 6, characterized in that: The ceramic heating sheet is attached to at least one side of the heating block and can be tightly attached to the heating block through the inwardly convex portion of the elastic clamping ring.

8. The 3D printer print head nozzle device according to claim 7, characterized in that: The temperature measuring sensor is arranged on at least one side of the heating block, and the lead wire of the temperature measuring sensor can match the outward concave portion of the elastic clamp tightly clamped on the heating block.

9. The 3D printer print head nozzle device according to claim 8, characterized in that: At least one side of the heating block is provided with a slot for the temperature measuring sensor to enter.

10. The 3D printer print head nozzle device according to claim 9, characterized in that: The slot is adjacent to the second end of the heating block.

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