阅读说明：本技术 免维护3d打印加工喷头结构 (Maintenance-free 3D printing processing spray head structure ) 是由 李景贺 于 2018-08-01 设计创作，主要内容包括：免维护3D打印加工喷头结构,解决现有喷头结构复杂,机械强度和耐热性差,喉管、喷头与加热块的常规连接方法是螺纹连接,而长时间的打印工作非常容易使螺纹连接处产生松动,从而产生间隙,造成打印耗材从间隙中挤出,造成打印失败和喷头组件破损的技术问题。采用的技术方案是,喷头和喉管为整体的金属喉管喷嘴,所述的加热体由固定在加热块和加热棒构成,加热棒安装在加热块内,金属喉管喷嘴安装在加热块上,并由锁紧螺钉固定,所述的加热块上设置有用于控制加热块温度的热敏电阻。有益效果是结构简单,可靠性好,免维护。(Non-maintaining 3D prints processing shower nozzle structure, it is complicated to solve current shower nozzle structure, and mechanical strength and heat resistance are poor, and the conventional connected method of choke, shower nozzle and heating piece is threaded connection, and long-time printing work makes threaded connection department produce not hard up very easily to produce the clearance, cause the printing consumptive material to extrude from the clearance, cause the technical problem that printing failure and shower nozzle subassembly are damaged. The technical scheme is that the nozzle and the throat are an integral metal throat nozzle, the heating body is composed of a heating block and a heating rod, the heating rod is installed in the heating block, the metal throat nozzle is installed on the heating block and fixed by a locking screw, and a thermistor used for controlling the temperature of the heating block is arranged on the heating block. The device has the advantages of simple structure, good reliability and no maintenance.)

1. Non-maintaining 3D prints processing shower nozzle structure, including shower nozzle, choke and heating member, its characterized in that: the metal throat nozzle is characterized in that the spray head and the throat are an integral metal throat nozzle (1), the heating body is formed by fixing the heating block (2) and a heating rod (4), the heating rod (4) is installed in the heating block (2), the metal throat nozzle (1) is installed on the heating block (2), and a locking screw (5) of the metal throat nozzle (1) is arranged on the heating block (2).

2. The maintenance-free 3D printing processing nozzle structure according to claim 1, wherein: the heating block (2) is provided with a thermistor (3) for controlling the temperature of the heating block.

Technical Field

The invention belongs to the technical field of 3D printers based on FDM (frequency division multiplexing) forming principles, and particularly relates to a maintenance-free 3D printing processing spray head structure.

Technical Field

The FDM forming principle printer sprays printing consumables from a specific spray head through an extrusion mechanism, and moves in a three-dimensional space through computer numerical control, so that the consumables extruded from the spray head are fused and deposited layer by layer to stack a three-dimensional model. The nozzle assembly used by the 3D printer based on the FDM forming principle is generally assembled by three or more parts, a throat part in the nozzle assembly is an important part, the existing FDM nozzle throat material is generally PTFE (polytetrafluoroethylene), PEEK (polyether ether ketone) and other heat insulation and heat resistance materials, PTFE and PEEK belong to nonmetal materials, the mechanical strength and the heat resistance of the PTFE and the PEEK have certain limits, the throat part is used as a transition part for connecting a hot section and a cold section of the whole nozzle assembly, and in order to meet the requirement of printing materials needing high-temperature extrusion, the nozzle assembly needs to have higher heat resistance and stronger mechanical strength. Thus, PTFE and PEEK have certain limitations as throat materials.

The conventional connection method of the throat pipe, the spray head and the heating block is threaded connection, and long-time printing work easily enables the threaded connection to be loosened, so that gaps are generated, printing consumables are extruded from the gaps, printing failure is caused, and even a spray head assembly is damaged.

The shower nozzle material of the 3D printer of FDM shaping principle is copper, and copper itself is great to the adhesion of printing consumptive material, like this, just produces great extrusion pressure easily to cause the not smooth, the unreliable problem of shower nozzle work of printing work easily. In summary, it is significant to provide a new simple, efficient and reliable showerhead assembly.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, the requirement of printing some materials needing high-temperature extrusion is high in heat resistance and mechanical strength, and the application range of PTFE and PEEK as throat pipe materials is limited. The invention discloses a maintenance-free 3D printing and processing spray head structure.

Drawings

FIG. 1 is a schematic structural view of the present invention

In the attached drawing, 1, a throat nozzle, 5, a locking screw, 2, a fixed heating block, 4, a heating rod, 3 and a thermistor.

Detailed Description

Referring to the drawings, the structural design mainly comprises the following components:

non-maintaining 3D prints processing shower nozzle structure, including shower nozzle, choke and heating member, shower nozzle and choke be holistic metal throat nozzle 1, the heating member constitute by fixing at heating block 2 and heating rod 4, heating rod 4 is installed in heating block 2, metal throat nozzle 1 is installed on heating block 2, is provided with the locking screw 5 of metal throat nozzle 1 on the heating block 2.

The integrated throat nozzle design part 1 is a throat nozzle integrated design part made of 304 stainless steel and formed by CNC (computer numerical control) machining, the throat nozzle integrated design part 1 is fixed on a heating block 2 through locking of a locking screw 5, and the mounting position is shown in the figure, namely the upper surface of the heating block 2 and the upper surface of the lower end of the throat nozzle integrated design part 1 are in the same plane. The heating rod 4 in the heating block 2 is a heating element and is responsible for heating the whole spray head assembly.

In the embodiment of the invention: and a thermistor 3 for controlling the temperature of the heating block is arranged on the heating block 2. The thermistor 3 is responsible for feeding back the real-time temperature to the control system. And the automatic control is convenient to realize.