阅读说明：本技术 一种基于微流体混合结构的自清理式石膏基3d打印喷头 (Self-cleaning gypsum-based 3D printing spray head based on microfluid mixed structure ) 是由 黄健 杨正才 马保国 蹇守卫 李相国 谭洪波 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种基于微流体混合结构的自清理式石膏基3D打印喷头,包括混合密封顶针、挤出头顶针、微流体混合器、气动信号控制器、清洗液入口、清洗废液出口、多个进料口、3D打印喷嘴和腔体,腔体内设有内腔通道,混合密封顶针和微流体混合器依次设置于内腔通道内,混合密封顶针与微流体混合器连接；清洗液入口、清洗废液出口、多个进料口和3D打印喷嘴均设置于壳体上,多个进料口设置于微流体混合器的输入端,挤出头顶针和3D打印喷嘴相对设置于微流体混合器的输出端的两侧；气动信号控制器通过气动阀与混合密封顶针和挤出头顶针连接。实现微流体混料和自动清理,残料不易堵塞打印喷头的管路,提高了工作效率,延长3D打印喷头的使用寿命。(The invention discloses a self-cleaning gypsum-based 3D printing spray head based on a microfluid mixing structure, which comprises a mixing sealing thimble, an extrusion head thimble, a microfluid mixer, a pneumatic signal controller, a cleaning liquid inlet, a cleaning waste liquid outlet, a plurality of feed inlets, a 3D printing nozzle and a cavity, wherein an inner cavity channel is arranged in the cavity; the cleaning liquid inlet, the cleaning waste liquid outlet, the plurality of feed inlets and the 3D printing nozzle are all arranged on the shell, the plurality of feed inlets are arranged at the input end of the microfluid mixer, and the extrusion head thimble and the 3D printing nozzle are oppositely arranged at two sides of the output end of the microfluid mixer; the pneumatic signal controller is connected with the mixed sealing thimble and the extrusion head thimble through a pneumatic valve. Realize microfluid compounding and automatic clearance, the difficult pipeline that prints the shower nozzle that blocks up of defective material has improved work efficiency, prolongs 3D and prints the life of shower nozzle.)

1. A self-cleaning gypsum-based 3D printing spray head based on a microfluid mixing structure is characterized by comprising a mixing sealing ejector pin, an extrusion head ejector pin, a microfluid mixer, a pneumatic signal controller, a cleaning liquid inlet, a cleaning waste liquid outlet, a plurality of feed inlets, a 3D printing nozzle and a cavity, wherein an inner cavity channel is arranged in the cavity, the mixing sealing ejector pin and the microfluid mixer are sequentially arranged in the inner cavity channel, and the mixing sealing ejector pin is connected with the microfluid mixer;

the cleaning solution inlet, the cleaning waste liquid outlet, the plurality of feed inlets and the 3D printing nozzle are all arranged on the shell, the cleaning solution inlet and the cleaning waste liquid outlet are arranged on one side of the inner cavity channel, the plurality of feed inlets are arranged at the input end of the microfluid mixer, and the extrusion head thimble and the 3D printing nozzle are oppositely arranged on two sides of the output end of the microfluid mixer;

the pneumatic signal controller is connected with the mixed sealing thimble and the extrusion head thimble through a pneumatic valve.

2. The self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure as claimed in claim 1, wherein the mixing sealing ejector pin and the microfluidic mixer are coaxially connected.

3. The self-cleaning gypsum-based 3D printing nozzle based on a microfluidic mixing structure as claimed in claim 1, wherein the number of the feed ports is two, and the two feed ports are a component A feed port and a component B feed port.

4. The self-cleaning gypsum-based 3D printing nozzle based on the micro-fluid mixing structure as claimed in claim 1, wherein the same pneumatic signal controller is respectively connected with the mixing sealing ejector pin and the extrusion head ejector pin for controlling, so as to realize linkage of the mixing sealing ejector pin and the extrusion head ejector pin.

5. The self-cleaning gypsum-based 3D printing nozzle based on a microfluidic mixing structure according to claim 1, wherein the extrusion head thimble and the 3D printing nozzle are arranged on the same vertical axis, and the extrusion head thimble is in a taper shape.

6. The self-cleaning gypsum-based 3D printing nozzle based on a microfluid mixing architecture of claim 1, wherein the microfluid mixer comprises a tube body, and a plurality of sets of baffles arranged in a cross-over manner are arranged in the tube body.

7. The self-cleaning gypsum-based 3D printing nozzle based on a microfluid mixing structure as claimed in claim 1, wherein the microfluid mixer comprises a tube body, and a plurality of sets of left-handed and right-handed cross-arranged spiral plates are arranged in the tube body.

8. The self-cleaning gypsum-based 3D printing nozzle based on the microfluidic mixing structure as claimed in claim 1, wherein the cleaning liquid inlet and the cleaning waste liquid outlet are arranged in a staggered opening manner, and the cleaning liquid flows in a single direction.

9. The self-cleaning gypsum-based 3D printing nozzle based on a microfluid mixing structure according to claim 1, wherein the pneumatic signal controller drives the mixing sealing ejector pin to move forward or backward through a pneumatic valve, and then the mixing sealing ejector pin drives the microfluid mixer to move back and forth longitudinally along the inner cavity channel to form a front gear and a rear gear; when the microfluid mixer is in a gear, the plurality of feed inlets are communicated with the microfluid mixer, the cleaning liquid inlet and the cleaning waste liquid outlet are disconnected with the microfluid mixer, when the microfluid mixer is in another gear, the cleaning liquid inlet and the cleaning waste liquid outlet are communicated with the microfluid mixer, and the plurality of feed inlets are disconnected with the microfluid mixer.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a self-cleaning gypsum-based 3D printing spray head based on a microfluid mixed structure.

Background

The 3D printing technology, also known as additive manufacturing technology, is an emerging technology in the field of rapid prototyping, and is a technology for building an object by printing layer by layer using a bondable material such as powdered metal or plastic based on a digital file. Newer iterations through years of 3D printing technology are becoming mature, but materials are becoming barriers to their further development, common printing materials such as: the present gypsum inorganic materials are hot spots in research on high polymer materials such as thermoplastic plastics, metal powder, ceramic powder and resin.

3D printing technology is developing more and more rapidly. At present, the method plays an important role in daily life and industrial production. The 3D printer is controlled by a computer, printing materials are overlapped layer by layer, and finally a design drawing on the computer is changed into a real object, so that the 3D printer is a revolutionary technology.

In a 3D printing nozzle, for example, patent No. CN 10627345a related to a 3D printing nozzle, the 3D printing nozzle of the present invention does not need a wire connection, and can supply power by contacting with a contact type connector; the nozzle is telescopic, the condition that the nozzle collides with a product cannot happen due to the design, and the printing wire cannot be stuck on the product.

The current 3D prints the shower nozzle and can not carry out microfluid compounding, and the pipeline of shower nozzle is printed in easy jam of defective material moreover, and difficult washing influences its work efficiency.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a self-cleaning gypsum-based 3D printing spray head based on a microfluid mixing structure, aiming at the defects in the prior art, so that microfluid mixing and automatic cleaning are realized, the spray head is easy to clean, residual materials are not easy to block pipelines of the printing spray head, the working efficiency is improved, and the service life of the 3D printing spray head is prolonged.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a self-cleaning gypsum-based 3D printing spray head based on a microfluid mixing structure comprises a mixing sealing ejector pin, an extrusion head ejector pin, a microfluid mixer, a pneumatic signal controller, a cleaning liquid inlet, a cleaning waste liquid outlet, a plurality of feed inlets, a 3D printing nozzle and a cavity, wherein an inner cavity channel is arranged in the cavity, the mixing sealing ejector pin and the microfluid mixer are sequentially arranged in the inner cavity channel, and the mixing sealing ejector pin is connected with the microfluid mixer;

the cleaning solution inlet, the cleaning waste liquid outlet, the plurality of feed inlets and the 3D printing nozzle are all arranged on the shell, the cleaning solution inlet and the cleaning waste liquid outlet are arranged on one side of the inner cavity channel, the plurality of feed inlets are arranged at the input end of the microfluid mixer, and the extrusion head thimble and the 3D printing nozzle are oppositely arranged on two sides of the output end of the microfluid mixer;

the pneumatic signal controller is connected with the mixed sealing thimble and the extrusion head thimble through a pneumatic valve.

According to the technical scheme, the mixing sealing thimble is coaxially connected with the microfluid mixer.

According to the technical scheme, the number of the feed inlets is two, namely the component A feed inlet and the component B feed inlet.

According to the technical scheme, the same pneumatic signal controller is respectively connected and controlled with the mixed sealing ejector pin and the extrusion head ejector pin, so that the linkage of the mixed sealing ejector pin and the extrusion head ejector pin is realized.

According to the technical scheme, the extrusion head thimble and the 3D printing nozzle are arranged on the same vertical axis, and the extrusion head thimble is in a taper shape.

According to the technical scheme, the micro-micro fluid mixer comprises a pipe body, wherein a plurality of groups of baffles which are arranged in a crossed mode are arranged in the pipe body.

According to the technical scheme, the mixing element of the microfluid mixer is formed by combining a left baffle and a right baffle which form an angle of 45 degrees with the pipe wall. The microfluid mixer does not need to be mechanically stirred, the component A and the component B collide when passing through the tail end of the baffle, the flow velocity is accelerated, convection is formed, the mutual diffusion of microfluid molecules of the two components is accelerated, and the high-efficiency mixing of microfluid is realized.

According to the technical scheme, the microfluid mixer comprises a pipe body, wherein a plurality of groups of spiral plates which are arranged in a left-handed and right-handed crossed manner are arranged in the pipe body.

According to the technical scheme, the cleaning liquid inlet and the cleaning waste liquid outlet are arranged in a staggered opening mode, and the cleaning liquid flows in a single direction.

According to the technical scheme, the pneumatic signal controller drives the mixing sealing ejector pin to push forwards or move backwards through the pneumatic valve, and then the mixing sealing ejector pin drives the microfluid mixer to move forwards and backwards along the longitudinal direction of the inner cavity channel to form a front gear and a rear gear; when the microfluid mixer is in a gear, the plurality of feed inlets are communicated with the microfluid mixer, the cleaning liquid inlet and the cleaning waste liquid outlet are disconnected with the microfluid mixer, when the microfluid mixer is in another gear, the cleaning liquid inlet and the cleaning waste liquid outlet are communicated with the microfluid mixer, and the plurality of feed inlets are disconnected with the microfluid mixer.

The invention has the following beneficial effects:

realize microfluid compounding and automatic clearance, it is easy to wash, the difficult pipeline that blocks up the printing shower nozzle of defective material, improved work efficiency, the life that 3D printed the shower nozzle is prolonged.

Drawings

FIG. 1 is an elevation view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in an embodiment of the invention;

FIG. 2 is a cross-sectional view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in an embodiment of the invention;

FIG. 3 is a cross-sectional view of a microfluidic mixer in an embodiment of the present invention;

FIG. 4 is an elevation view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in a discharge state in an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in a discharge state in an embodiment of the present invention;

FIG. 6 is an elevation view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in an embodiment of the invention in a material break state;

FIG. 7 is a cross-sectional view of a self-cleaning gypsum-based 3D printing head based on a microfluidic mixing structure in an embodiment of the invention in a material break state;

in the figure, 1-mixing sealing ejector pin, 2-extrusion head ejector pin, 3-pneumatic signal controller, 4-pneumatic valve, 5-cleaning liquid inlet, 6-cleaning waste liquid outlet, 7-component A feed inlet, 8-component B feed inlet, 9-3D printing nozzle, 10-microfluid mixer, 12-baffle plate and 13-tube body.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 7, in an embodiment of the invention, a self-cleaning gypsum-based 3D printing nozzle based on a microfluidic mixing structure includes a mixing sealing thimble 1, an extrusion head thimble 2, a microfluidic mixer 10, a pneumatic signal controller 3, a cleaning solution inlet 5, a cleaning waste solution outlet 6, a plurality of feed inlets, a 3D printing nozzle 9, and a cavity, an inner cavity channel is disposed in the cavity, the mixing sealing thimble 1 and the microfluidic mixer 10 are sequentially disposed in the inner cavity channel, and the mixing sealing thimble 1 is connected to the microfluidic mixer 10;

the cleaning solution inlet 5, the cleaning waste liquid outlet 6, the plurality of feed inlets and the 3D printing nozzle 9 are all arranged on the shell, the cleaning solution inlet 5 and the cleaning waste liquid outlet 6 are arranged on one side of the inner cavity channel, the plurality of feed inlets are arranged at the input end of the microfluid mixer 10, and the extrusion head thimble 2 and the 3D printing nozzle 9 are oppositely arranged on two sides of the output end of the microfluid mixer 10 and are communicated with the output end of the microfluid mixer 10;

the pneumatic signal controller 3 is connected with the mixing sealing thimble 1 and the extrusion head thimble 2 through a pneumatic valve 4.

Further, the mixing sealing ejector pin 1 and the extrusion head ejector pin 2 are both pneumatic ejector pins, and the pneumatic signal controller 3 controls the mixing sealing ejector pin 1 and the extrusion head ejector pin 2 to act through a pneumatic valve 4.

Further, the mixing sealing thimble 1 and the microfluid mixer 10 are coaxially connected.

Further, the number of the feed inlets is two, namely a component A feed inlet 7 and a component B feed inlet 8.

Furthermore, the same pneumatic signal controller 3 is respectively connected with the mixed sealing thimble 1 and the extrusion head thimble 2 for control, so that the linkage of the mixed sealing thimble 1 and the extrusion head thimble 2 is realized.

Furthermore, the extrusion head thimble 2 and the 3D printing nozzle 9 are arranged on the same vertical axis, and the extrusion head thimble 2 is in a taper shape; the residual material blocked at the 3D printing nozzle 9 can be more effectively cleaned.

Further, the microfluid mixer 10 includes a tube 13, and a plurality of sets of baffles 12 arranged in a cross manner are disposed in the tube 13.

Further, the mixing elements of the microfluidic mixer 10 are combined by left and right baffles 12 at 45 ° to the tube wall. The microfluid mixer 10 does not need to be mechanically stirred, the component A and the component B collide when passing through the tail end of the baffle 12, the flow velocity is accelerated, convection is formed, the mutual diffusion of microfluid molecules of the two components is accelerated, and the high-efficiency mixing of microfluid is realized.

Furthermore, the microfluid mixer comprises a pipe body, wherein a plurality of groups of spiral plates which are arranged in a left-handed and right-handed crossed manner are arranged in the pipe body.

Further, the pipe body is respectively provided with a plurality of inlets which are respectively arranged opposite to the plurality of feed inlets one by one, when the mixing sealing ejector pin 1 is ejected out, the inlets on the microfluid mixer 10 are butted with the feed inlets, so that the plurality of feed inlets are communicated with the microfluid mixer 10.

Furthermore, the cleaning liquid inlet 5 and the cleaning waste liquid outlet 6 are arranged in a staggered opening manner, and the cleaning liquid flows in a single direction; avoiding the existence of cleaning dead angles.

Further, a cleaning liquid inlet 5 and a cleaning waste liquid outlet 6 are arranged on two sides of the inner cavity channel, and the cleaning liquid inlet 5 and the cleaning waste liquid outlet 6 are arranged on the mixed sealing thimble 1 section of the inner cavity channel and communicated with the inner cavity channel.

Further, the pneumatic signal controller 3 drives the mixing sealing ejector pin 1 to move forward or backward through the pneumatic valve 4, and then the mixing sealing ejector pin 1 drives the microfluid mixer 10 to move back and forth longitudinally along the inner cavity channel to form a front gear and a rear gear; when the micro-fluid mixer 10 is in one gear, the plurality of feed inlets are communicated with the micro-fluid mixer 10, the cleaning solution inlet 5 and the cleaning waste liquid outlet 6 are disconnected from the micro-fluid mixer 10, when the micro-fluid mixer 10 is in another gear, the cleaning solution inlet 5 and the cleaning waste liquid outlet 6 are communicated with the micro-fluid mixer 10, and the plurality of feed inlets are disconnected from the micro-fluid mixer 10.

The working principle of the invention is as follows:

a schematic structural diagram of a self-cleaning gypsum 3D printing spray head based on a microfluid mixing structure, as shown in fig. 1 and 2, a self-cleaning gypsum 3D printing spray head based on a microfluid mixing structure, comprising: the device comprises a mixing sealing thimble 1, an extrusion head thimble 2, a pneumatic signal controller 3, a pneumatic valve 4, a cleaning liquid inlet 5, a cleaning waste liquid outlet 6, a component A feed inlet 7, a component B feed inlet 8, a 3D printing nozzle 9 and a microfluid mixer 10; the mixing sealing thimble 1 is coaxially connected with the microfluid mixer 10; the mixed sealing thimble 1 and the extrusion head thimble 2 are controlled by the same pneumatic valve 4; the cleaning liquid inlet 5 is opened by being staggered with the cleaning waste liquid outlet 6; the extrusion head thimble 2 and the printing nozzle are on the same vertical axis

As shown in fig. 3, the mixing element of a microfluidic mixer 10 is spiral-shaped and is composed of a plurality of sets of left-handed and right-handed cross-arranged spiral plates twisted at 180 degrees.

As shown in figures 4 and 5, during discharging, the pneumatic signal controller 3 transmits a discharging signal to the pneumatic valve 4, the mixing sealing thimble 1 is pushed forward under the control of the pneumatic valve 4, the extrusion head thimble 2 is pulled upwards, the micro-fluid mixer 10 is connected with a feeding hole, the material A, B enters the micro-fluid mixer 10, multiple cutting, shearing, rotating and remixing are generated in the pipe body through multiple groups of immobile spiral mixing elements, rapid mixing is realized, high-viscosity fluid is formed, and rapid discharging is realized

When the material is cut off, the pneumatic signal controller 3 transmits a self-cleaning signal to the pneumatic valve 4, the mixing sealing ejector pin 1 is pushed backwards under the control of the pneumatic valve 4, the microfluid mixer 10 is connected with the opening of the cleaning device, and the cleaning liquid flows in a single direction to clean the residual material in the mixer; meanwhile, the extrusion head thimble 2 is pushed down to clean the residual material at the extrusion nozzle. The extrusion head thimble 2 and the mixed sealing thimble 1 are controlled by the same pneumatic valve 4 to realize linkage, so that the printing nozzle in a material cutting state realizes a self-cleaning mode, and the blockage of a nozzle pipeline is avoided.

In summary, the invention discloses a self-cleaning type gypsum 3D printing spray head based on a microfluid mixing structure. It includes: the device comprises a mixing sealing ejector pin 1, an extrusion head ejector pin 2, a microfluid mixer 10, a pneumatic signal controller 3, a pneumatic valve 4, a cleaning liquid inlet 5, a cleaning waste liquid outlet 6, a component A feed inlet 7, a component B feed inlet 8 and a 3D printing nozzle 9. Rapidly forming high-viscosity fluid through the microfluidic mixer 10 in a discharging state, and rapidly discharging; under the disconnected material state, can extrude first thimble 2 through mixing sealed thimble 1, pneumatic signal controller 3, pneumatic valve 4, washing liquid entry 5 and washing waste liquid outlet 6's mating reaction, realize self-cleaning, avoid printing nozzle pipeline jam.

The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.