Printing head and 3D printer

Abstract

The utility model provides a printing head and a 3D printer. The printing head is simple in structure and convenient to disassemble and assemble. The technical problem to be solved by the utility model is realized by the following technical means: on one hand, the utility model provides a printing head which comprises a throat pipe, a heating piece, a heat conduction piece, a printing nozzle and a heat dissipation piece, the heat conduction piece is arranged at the bottom of the heat dissipation piece through a mounting frame, the heating piece is sleeved outside the heat conduction piece, and the printing nozzle is arranged on the heat dissipation piece; the printing nozzle is connected to the lower portion of the heat conduction piece in a threaded mode, the upper portion of the printing nozzle is connected with the throat pipe, and the throat pipe upwards penetrates through the heat conduction piece and the heat dissipation piece. The utility model relates to the technical field of 3D printing.

Description

Technical Field

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

[0002] The print head of an FDM 3D printer is an important component used by the 3D printer to spit out printing consumables. Its main structure is the same as the application number CN2023214953515, the patent name is print head and the print head technical solution disclosed by the 3D printer. It mainly includes components such as a nozzle, a heating component, a heat dissipation component and a throat. Since the print nozzle is a wearing part and needs to be frequently inspected and replaced, the design of a print nozzle that is easy to disassemble and assemble is the key to the design of the print head; therefore, the present application proposes a print head that is easy to disassemble and assemble. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides a print head and a 3D printer, wherein the print head has a simple structure and is easy to assemble and disassemble.

[0004] The technical problem to be solved by the utility model is achieved through the following technical means: One aspect of the utility model is to propose a print head, including a throat, a heating element, a heat-conducting element, a print nozzle and a heat sink, the heat-conducting element is installed on the bottom of the heat sink through a mounting frame, the heating element is sleeved on the outside of the heat-conducting element, the print nozzle is screwed on the lower part of the heat-conducting element, the upper part of the print nozzle is connected to the throat, and the throat passes upward through the heat-conducting element and the heat sink.

[0005] In the above scheme, the print head includes a throat, a heating element, a heat conducting element, a print nozzle, and a heat dissipating element, which are assembled to form the print head, wherein the throat and the print nozzle are connected, and when replaced or repaired as a whole, the whole is removed from the heat conducting element at the same time, and the print nozzle is fixed by screw connection, and the structure is simple and easy to disassemble. When disassembling and assembling the print nozzle, the utility model does not need to disassemble the heating element, the heat conducting element and other components, so it is more convenient.

[0006] In one embodiment, the heat sink includes a main body and a plurality of heat sink fins arranged on the main body, the mounting frame includes two connecting columns arranged at the bottom of the main body and a mounting seat arranged between the two connecting columns, the heat conductor is screwed to the middle of the mounting seat, a limiting groove is arranged on the upper part of the heat conductor, a screw hole corresponding to the limiting groove is arranged on one side of the mounting seat, and a locking screw matching the heat conductor is arranged in the screw hole.

[0007] In the above scheme, the mounting frame allows the heat conducting member to be relatively fixed to the heat dissipating member, and the print nozzle is mounted on the heat conducting member, so the heat conducting member, the heat dissipating member and the print nozzle can also be relatively fixed. The connecting column is made of Teflon material, and the connecting column is screwed to the heat dissipating member by screws.

[0008] In one embodiment, a mounting cavity is vertically arranged on one side of the heat conductive member, a temperature sensor is arranged in the mounting cavity, a through hole corresponding to the mounting cavity is arranged on one side of the mounting seat, a fastener for fastening the temperature sensor in the mounting cavity is arranged in the through hole.

[0009] In the above solution, the temperature sensor is a common accessory of the print head. In the present invention, a fastener can be used to clamp the temperature sensor so that the temperature sensor is limited and fixed.

[0010] In one embodiment, the fastener is a connecting glue, and the temperature sensor is fixed in the installation cavity by the glue.

[0011] In one embodiment, a limiting ring is provided at the bottom of the heat conducting element, and the bottom of the heating element cooperates with the limiting ring.

[0012] In one embodiment, the heating element is ring-shaped.

[0013] In the above solution, the heating element can be inserted into the heat-conducting element from top to bottom.

[0014] In one embodiment, the heating element is provided with a positive contact and a negative contact.

[0015] In the above solution, the positive contact and the negative contact are used to connect the wires, and the heating element is an electric heating element, such as an annular shell plus an electric heating wire arranged on the annular shell.

[0016] In one embodiment, a heat insulating sleeve is provided outside the heating element.

[0017] In one embodiment, an annular reducing groove is provided in the middle of the throat.

[0018] In the above scheme, the heating of the heating element causes the temperature of the print nozzle and a part of the throat close to the print nozzle to rise. In order to avoid temperature loss, an annular reducing groove is designed on the throat, which can reduce the heat transferred from the throat to the upper part of the throat to a certain extent. In addition, when the throat is loaded on the print head, the annular reducing groove is located between the heat conductor and the heat sink.

[0019] Another aspect of the present invention is to provide a 3D printer, which comprises the print head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the structure of a print head in an embodiment;

[0021] Figure 2 is an exploded schematic diagram of a partial structure of a print head in an embodiment;

[0022] Figure 3 The figure is a schematic diagram of the cooperation between the heat conducting member and the mounting frame in one embodiment. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] like Figures 1 to 3 As shown, the technical solution adopted by the utility model is that the technical problem to be solved by the utility model is achieved through the following technical means: One aspect of the utility model is to propose a print head, including a throat 1, a heating element 2, a heat-conducting element 3, a print nozzle 4 and a print nozzle 7, the heat-conducting element 3 is installed on the bottom of the print nozzle 7 through a mounting frame 5, the heating element 2 is sleeved on the outside of the heat-conducting element 3, the print nozzle 4 is screwed on the lower part of the heat-conducting element 3, the upper part of the print nozzle 4 is connected to the throat 1, and the throat 1 passes through the heat-conducting element 3 and the print nozzle 7 upward.

[0025] In the above scheme, the print head includes a throat 1, a heating element 2, a heat conducting element 3, a print nozzle 4, and a print nozzle 7, which are assembled to form the print head. The throat 1 and the print nozzle 4 are connected and can be removed from the heat conducting element 3 as a whole when replaced or repaired, and the print nozzle 4 is fixed by screw connection, which has a simple structure and is easy to disassemble. When disassembling and assembling the print nozzle 4, the utility model does not need to disassemble the heating element, the heat conducting element and other components, so it is more convenient.

[0026] In one embodiment, the print nozzle 7 includes a main body 6 and a plurality of heat dissipation fins arranged on the main body 6, the mounting frame 5 includes two connecting columns 8 arranged at the bottom of the main body 6 and a mounting seat 9 arranged between the two connecting columns 8, the heat conductor 3 is screwed to the middle of the mounting seat 9, a limiting groove 10 is arranged on the upper part of the heat conductor 3, a screw hole 11 corresponding to the limiting groove 10 is arranged on one side of the mounting seat 9, and a locking screw matching the heat conductor 3 is arranged in the screw hole 11.

[0027] In the above scheme, the mounting frame 5 allows the heat conducting member 3 to be relatively fixed to the print nozzle 7, and the print nozzle 4 is mounted on the heat conducting member 3, so the heat conducting member 3, the print nozzle 7 and the print nozzle 4 can also be relatively fixed. The connecting column 8 is made of Teflon material, and the connecting column 8 is screwed to the print nozzle 7 by screws.

[0028] In one embodiment, a mounting cavity 12 is vertically arranged on one side of the heat conductor 3, a temperature sensor is arranged in the mounting cavity 12, a through hole 14 corresponding to the mounting cavity 12 is arranged on one side of the mounting seat 9, and a fastener for fastening the temperature sensor in the mounting cavity 12 is arranged in the through hole 14.

[0029] In the above solution, the temperature sensor is a common accessory of the print head. In the present invention, a fastener can be used to clamp the temperature sensor so that the temperature sensor is limited and fixed.

[0030] In one embodiment, the fastener is a connecting glue, and the temperature sensor is fixed in the installation cavity 12 by glue.

[0031] In one embodiment, a limiting ring 15 is provided at the bottom of the heat conducting element 3 , and the bottom of the heating element 2 cooperates with the limiting ring 15 .

[0032] In one embodiment, the heating element 2 is ring-shaped.

[0033] In the above solution, the heating element 2 can be inserted into the heat conducting element 3 from top to bottom.

[0034] In one embodiment, the heating element 2 is provided with a positive contact 16 and a negative contact 17 .

[0035] In the above solution, the positive contact 16 and the negative contact 17 are used to connect the wires, and the heating element 2 is an electric heating element, such as an annular shell plus an electric heating wire arranged on the annular shell.

[0036] In one embodiment, a heat insulating sleeve 18 is disposed outside the heating element 2 .

[0037] In one embodiment, an annular reducing groove 19 is provided in the middle of the throat 1 .

[0038] In the above scheme, the heating of the heating element 2 causes the temperature of the print nozzle 4 and the part of the throat 1 close to the print nozzle 4 to rise. In order to avoid temperature loss, an annular reducing groove 19 is designed on the throat 1, which can reduce the heat on the throat 1 to a certain extent. Transfer to the upper half of the throat 1, in addition, when the throat 1 is loaded on the print head, the annular reducing groove 19 is located between the heat conductor 3 and the print nozzle 7.

[0039] Another aspect of the present invention is to provide a 3D printer, which comprises the print head.

Claims

1. A print head, comprising a throat (1), a heating element (2), a heat conducting element (3), a print nozzle (4) and a heat dissipating element (7), characterized in that: The heat-conducting member (3) is mounted on the bottom of the heat-dissipating member (7) via a mounting frame (5); the heating member (2) is sleeved on the outside of the heat-conducting member (3); the printing nozzle (4) is screwed to the bottom of the heat-conducting member (3); the top of the printing nozzle (4) is connected to the throat (1); and the throat (1) passes through the heat-conducting member (3) and the heat-dissipating member (7) upwards.

2. The print head according to claim 1, characterized in that: The heat sink (7) comprises a main body (6) and a plurality of heat sink fins arranged on the main body (6); the mounting frame (5) comprises two connecting columns (8) arranged at the bottom of the main body (6) and a mounting seat (9) arranged between the two connecting columns (8); the heat conducting member (3) is screwed to the middle of the mounting seat (9); a limiting groove (10) is arranged on the upper part of the heat conducting member (3); a screw hole (11) corresponding to the limiting groove (10) is arranged on one side of the mounting seat (9); a locking screw matching the heat conducting member (3) is arranged in the screw hole (11).

3. The print head according to claim 2, characterized in that: A mounting cavity (12) is vertically arranged on one side of the heat conducting member (3), a temperature sensor is arranged in the mounting cavity (12), a through hole (14) corresponding to the mounting cavity (12) is arranged on one side of the mounting seat (9), and a fastener for fastening the temperature sensor in the mounting cavity (12) is arranged in the through hole (14).

4. The print head according to claim 3, characterized in that: The fastener is a connecting glue, and the temperature sensor is fixed in the installation cavity (12) by means of the glue.

5. The print head according to claim 1, characterized in that: A limiting ring (15) is provided at the bottom of the heat conducting element (3), and the bottom of the heating element (2) cooperates with the limiting ring (15).

6. The print head according to claim 1, characterized in that: The heating element (2) is ring-shaped.

7. The print head according to claim 1, characterized in that: The heating element (2) is provided with a positive electrode contact (16) and a negative electrode contact (17).

8. The print head according to claim 1, characterized in that: A heat insulating sleeve (18) is provided outside the heating element (2).

9. The print head according to claim 1, characterized in that: An annular reducing groove (19) is provided in the middle of the throat pipe (1).

10. A 3D printer, characterized in that: Comprising the print head as claimed in any one of claims 1 to 9.

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