3D printer nozzle and printer

Abstract

The utility model provides a 3D printer nozzle and printer, including the print head, the print head is equipped with the nozzle and heating subassembly, forms the material channel that allows printing material to pass through in the print head, the heating subassembly includes heating block, temperature detector and heating tube, the nozzle is fixed to the heating block of the heating assembly through threads, a heat dissipation structure is arranged on the nozzle, and the heat dissipation structure comprises a first connector, a cooling cavity and a second connector. The heating pipe is placed around the material channel, the effect that the heating block evenly heats the printing material in the material channel is achieved, temperature measurement is carried out through the temperature detector based on the principle that the resistance value of a metal conductor is increased along with temperature increase, temperature signals detected by the temperature detector are received, and control signals are sent to the heating assembly, so that the printing material in the material channel is heated. The temperature of the nozzle is controlled. And the printing material sprayed out of the nozzle is condensed and cured in time through the heat dissipation structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field, concretely is a kind of 3D printer nozzle and printer. BACKGROUND

[0002] 3D printing is a kind of digital model file as foundation, using powder-like metal or plastic and other adhesion materials, by layer-by-layer printing to construct object technology.3D printing is usually realized by digital technology material printer, and is usually used for manufacturing model in mold manufacturing, industrial design and other fields.

[0003] After searching, the nozzle assembly of the print head for the 3D printer and the 3D printer of the present application, including nozzle, its inside forms the material passage that allows printing material to pass;Heater, for attaching to nozzle, to heat nozzle to melt printing material;And fixing clamp, for clamping nozzle and heater, to fix heater on nozzle. The nozzle assembly directly attaches the heater to the nozzle, reducing the complexity of the print head structure above the nozzle. Using a fixing clamp to fix the heater to the nozzle by elastic force, avoiding the use of screws and other fastening devices, simplifying the installation structure of the nozzle assembly.

[0004] The above-mentioned equipment, since the heater is only attached to one side of the nozzle, the printing material in the material passage may not be heated uniformly, which may cause the nozzle to be blocked by residual and accumulated printing material particles. To solve this problem, a 3D printer with uniform heating is designed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of 3D printer nozzle and printer to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of 3D printer nozzle, including print head, the print head is equipped with nozzle and heating assembly, the material passage allowing printing material to pass is formed in the inside of print head, the heating assembly includes heating block, temperature detector and heating pipe, the material passage outside in the inside of heating block is tightly surrounded by the part of spiral heating pipe of heating pipe, the nozzle is fixed by screw thread on the heating block of heating assembly, the material passage in the inside of nozzle is circumferentially provided with heat dissipation structure.

[0008] Preferably, the temperature detector includes a thermistor for thermal coupling with the heating block body and a wire connected to the thermistor.

[0009] Preferably, the heating block body is provided with an opening for the thermal resistance to extend into and a through hole for mounting the heating tube.

[0010] Preferably, the spiral shape extends from the top and the bottom to one end of the heating tube respectively, and extends from one side of the heating block to two ends, one end being an inlet pipe and the other end being an outlet pipe.

[0011] Preferably, the heat dissipation structure comprises a first interface, a cooling cavity and a second interface, the cooling cavity is arranged inside the nozzle, the first interface is arranged obliquely downward at the lower half of the nozzle, and the second interface is arranged obliquely upward at the upper half of the nozzle.

[0012] Preferably, the first interface and the second interface are respectively communicated with the cooling cavity.

[0013] To achieve the above object, the utility model further provides the following technical scheme:

[0014] A printer comprises the 3D printer nozzle according to any one of the preceding embodiments.

[0015] Compared with the prior art, the utility model has the following technical effects and advantages:

[0016] The heating tube is arranged inside the heating block, and the heating tube is arranged around the material channel, so that the heating block uniformly heats the printing material in the material channel, the temperature measurer measures the temperature based on the principle that the resistance value of the metal conductor increases with the increase of the temperature, the temperature signal detected by the temperature measurer is received, and a control signal is sent to the heating assembly to control the temperature of the nozzle.

[0017] The heat dissipation structure can condense and solidify the printing material sprayed from the nozzle in time, so that the extruded printing material can be properly cooled after leaving the heating nozzle, and size problems can be avoided, so that the workpiece is not formed, time and materials are wasted. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a three-dimensional schematic view of the whole structure of the utility model;

[0019] Fig. 2 It is a front view of the heating tube around the material channel of the utility model;

[0020] Fig. 3 It is a plan view of the heating tube around the material channel of the utility model;

[0021] Fig. 4 It is a sectional view of the nozzle structure of the utility model.

[0022] In the figure: 1 print head, 2 nozzle, 3 heating assembly, 4 heat dissipation structure, 5 material channel, 6 heating block, 7 temperature detector, 8 heating pipe, 9 thermal resistance, 10 opening, 11 through hole, 12 first interface, 13 second interface, 14 cooling cavity, 15 spiral, 16 inlet pipe, 17 outlet pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Embodiment:

[0025] Please refer to Figs. 1 to 4 The utility model provides a technical scheme:

[0026] A 3D printer nozzle, comprising a print head 1, the print head 1 is installed with nozzle 2 and heating assembly 3, the material channel 5 allowing printing material to pass through is formed in the print head 1, the heating assembly 3 includes heating block 6, temperature detector 7 and heating pipe 8, the outside of the material channel 5 inside the heating block 6 is tightly surrounded by the spiral 15 of the heating pipe 8, the nozzle 2 is fixed on the heating block 6 of the heating assembly 3 by screw thread, and the material channel 5 inside the nozzle 2 is circumferentially provided with heat dissipation structure 4.

[0027] Further, the temperature detector 7 includes a thermal resistance 9 for thermal coupling with the heating block 6 body and a wire connected with the thermal resistance 9.

[0028] Through the above structure, the temperature detector 7 measures the temperature based on the principle that the resistance value of the metal conductor increases with the increase of temperature, receives the temperature signal detected by the temperature detector 7, and sends a control signal to the heating assembly 3 to control the temperature of the nozzle 2, so that the heating pipe 8 is placed around the material channel 5, and the heating block 6 uniformly heats the printing material in the material channel 5.

[0029] Further, the heating block 6 body is provided with an opening 10 for the thermal resistance 9 to extend into and a through hole 11 for mounting the heating pipe 8.

[0030] Through the above structure, the heating pipe 8 and the thermal resistance 9 are arranged in the interior of the heating block 6.

[0031] Further, the spiral-shaped 15 extends from the top and bottom of the heating pipe 8 respectively one end, and both ends from the heating block 6 side, one end for the pipe inlet 16, the other end for the pipe outlet 17.

[0032] By the above structure, the heating pipe 8 realizes the heating inside the heating block 6.

[0033] Further, the heat dissipation structure 4 includes a first interface 12, a cooling cavity 14 and a second interface 13, the nozzle is internally provided with the cooling cavity 14, the first interface 12 is obliquely arranged on the lower half of the nozzle 2, and the second interface 13 is obliquely arranged on the upper half of the nozzle 2.

[0034] By the above structure, the first interface 12 and the second interface 13 are obliquely arranged, so that the cooling medium can enter and exit faster, and the cooling cavity 14 can cool the nozzle 2 faster.

[0035] Further, the first interface 12 and the second interface 13 are respectively connected to the cooling cavity 14.

[0036] By the above structure, the cooling medium flows through the cooling cavity 14 to dissipate heat from the nozzle 2.

[0037] A printer comprises the above-mentioned 3D printer nozzle.

[0038] Working principle:

[0039] Before use, first, the print head 1 is fixed with the 3D printer by screwing, and then the power connection port of the heating assembly 3 is connected with the circuit control system of the 3D printer.

[0040] In use, the 3D printing material enters the heating assembly 3 through the material channel 5, the heating pipe 8 uniformly surrounds the material channel 5 inside the heating block 6, the material channel 5 inside the heating block 6 is uniformly heated by controlling the heating pipe 8, the printing material is heated to melt, and the printing material is sprayed out through the nozzle 2, and the printing is completed.

[0041] At the same time of material melting, high temperature is also conducted into the cavity of the nozzle 2, if the cavity reaches a certain temperature, the material in the cavity begins to soften and deform, which not only affects the final accuracy of the printed model, but also may cause the nozzle 2 of the printer to be blocked, causing the printer to fail, and in order to make the 3D printed work more complete, the melted printing material needs to be sprayed out and quickly solidified into a solid. In order to achieve this cooling effect, a cooling medium is used for heat dissipation, and the cooling medium can be used in multiple ways, which can be low-temperature and low-pressure refrigerant vapor gas medium or liquid medium such as lithium bromide-water (refrigerant is water), ammonia-water (refrigerant is ammonia).

[0042] In order to directly dissipate heat of the nozzle 2, avoid the influence of multiple heat transfer modes on the heat dissipation efficiency, the cooling cavity 14 is directly formed in the nozzle 2, the cooling medium enters into the cooling cavity 14 through the first interface 12, after cooling the heat conducted to the cavity of the nozzle 2 by the heating block 6, the cooling medium is discharged through the second interface 13, and the melted 3D printing material is solidified to a certain extent, so that the 3D printing material can be quickly solidified after being sprayed through the nozzle 2.

[0043] The rest of the parts not described in the utility model can be the same as the prior art, or be the known technology or be realized by using the prior art, and will not be described in detail here.

[0044] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A 3D printer nozzle comprising a print head (1), characterized in that: The printing head (1) is provided with a nozzle (2) and a heating assembly (3), a material channel (5) allowing printing material to pass through is formed inside the printing head (1), the heating assembly (3) comprises a heating block (6), a temperature detector (7) and a heating pipe (8), the outside of the material channel (5) inside the heating block (6) is spirally (15) wrapped by a part of the heating pipe (8), the nozzle (2) is fixed to the heating block (6) of the heating assembly (3) through threads, and the material channel (5) inside the nozzle (2) is circumferentially provided with a heat dissipation structure (4).

2. The 3D printer nozzle of claim 1, wherein: The temperature detector (7) comprises a thermal resistance (9) for thermal coupling with the heating block (6) body and a wire connected with the thermal resistance (9).

3. The 3D printer nozzle of claim 2, wherein: The heating block (6) body is provided with an opening (10) for the thermal resistance (9) to extend into and a through hole (11) for mounting the heating pipe (8).

4. The 3D printer nozzle of claim 1, wherein: The spiral (15) extends from one end of the heating pipe (8) at the top and the bottom, respectively, and extends from one side of the heating block (6), one end being an inlet pipe (16) and the other end being an outlet pipe (17).

5. The 3D printer nozzle of claim 1, wherein: The heat dissipation structure (4) comprises a first interface (12), a cooling cavity (14) and a second interface (13), the cooling cavity (14) is formed inside the nozzle, the first interface (12) is obliquely downward arranged at the lower half of the nozzle (2), and the second interface (13) is obliquely upward arranged at the upper half of the nozzle (2).

6. The 3D printer nozzle of claim 5, wherein: The first interface (12) and the second interface (13) respectively communicate with the cooling cavity (14).

7. A printer characterized by: A 3D printer nozzle as claimed in any one of claims 1 to 6. A 3D printer nozzle as claimed in any one of claims 1 to 6.

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