阅读说明：本技术 一种多流道3d打印机喷头 (Multi-runner 3D printer nozzle ) 是由 胡文高 王宣 赵玉林 王荣辉 王运赣 于 2020-04-14 设计创作，主要内容包括：本发明公开了多流道3D打印机喷头,喷头中的多个材料流道汇集于一个共同喷嘴,用电磁阀和阻隔器实现流道通断切换,完成多材料的3D打印。其技术方案为：多流道3D打印机喷头由多个2流道的3D打印机喷头并列组成,其中2流道的3D打印机喷头包括第一注射器和第二注射器用于喷射流态材料；第一流道和第二流道用于流态材料的流通；喷嘴用于第一流道和第二流道的汇集；阻隔器用于阻隔第一流道和第二流道；第一供料筒和第二供料筒用于向第一注射器和第二注射器供应流态材料；第一电磁阀和第二电磁阀用于控制流态材料的喷射；其中通过第一电磁阀和第二电磁阀、以及阻隔器,控制第一流道和第二流道之间的通断切换,以使同一个喷嘴打印多种流态材料。(The invention discloses a multi-flow-channel 3D printer nozzle, wherein a plurality of material flow channels in the nozzle are collected in a common nozzle, and the switching of the on-off of the flow channels is realized by using an electromagnetic valve and a barrier device to finish the 3D printing of multiple materials. The technical scheme is as follows: the multi-runner 3D printer nozzle is formed by a plurality of 2-runner 3D printer nozzles in parallel, wherein the 2-runner 3D printer nozzles comprise a first injector and a second injector which are used for injecting fluid materials; the first flow channel and the second flow channel are used for flowing the fluid material; the nozzle is used for collecting the first flow channel and the second flow channel; the blocking device is used for blocking the first flow passage and the second flow passage; the first supply cylinder and the second supply cylinder are used for supplying the fluid materials to the first injector and the second injector; the first electromagnetic valve and the second electromagnetic valve are used for controlling the injection of the fluid material; the on-off switching between the first flow channel and the second flow channel is controlled through the first electromagnetic valve, the second electromagnetic valve and the blocking device, so that the same nozzle can print multiple kinds of fluid materials.)

1. The 3D printer nozzle of 2 runners, characterized in that, includes two syringes, two runners, a nozzle, a separation ware, two feed section of thick bamboo and two solenoid valves, wherein:

a first injector and a second injector for injecting fluid material;

the first flow channel and the second flow channel are used for flowing the fluid material;

the nozzle is used for collecting the first flow channel and the second flow channel;

the separator is used for separating the first flow passage and the second flow passage;

first and second supply cylinders for supplying fluent material to the first and second injectors;

the first electromagnetic valve and the second electromagnetic valve are used for controlling the injection of the fluid material;

the on-off switching between the first flow channel and the second flow channel is controlled through the first electromagnetic valve, the second electromagnetic valve and the blocking device, so that the same nozzle can print multiple kinds of fluid materials.

2. The 2-channel 3D printer head of claim 1, wherein the upper inlet of the first injector is in communication with the lower outlet of the first supply cylinder, and the lower outlet of the first injector is in communication with the upper inlet of the first channel; the upper inlet of the second injector is communicated with the lower outlet of the second feeding cylinder, and the lower outlet of the second injector is communicated with the upper inlet of the second flow passage.

3. The 2-channel 3D printer head of claim 2, wherein the lower outlet of the first channel and the lower outlet of the second channel are merged and then communicated with the inner hole of the nozzle.

4. The 2-flow-channel 3D printer nozzle as claimed in claim 3, wherein the barrier comprises a micro cylinder, a connecting plate, a barrier bolt, a cross hole and a plug; the overhanging piston rod of micro cylinder is connected with the connecting plate, 2 air inlets of micro cylinder are connected with 2 lower openings of second solenoid valve respectively, the lower extreme of connecting plate is connected with the middle section that the separation was tied, the surface and the cross bore cooperation that the separation was tied so that the separation can be followed left right direction reciprocating motion in the cross bore, the upper segment of the relative first runner of cross bore and second runner is the vertical layout, two end caps are located both ends about the cross bore respectively for the side-to-side motion that the separation was tied is spacing.

5. The 2-channel 3D printer head of claim 4, wherein the blocking pin is a cylindrical rubber piece.

6. The 2-channel 3D printer head according to claim 4, wherein the upper inlets of the first and second supply cylinders are connected to two lower ports of the first solenoid valve, respectively.

7. The 2-channel 3D printer head of claim 6, wherein the inlets of the first solenoid valve and the second solenoid valve are both connected to a compressed air source, and the outlet of the second solenoid valve is connected to the micro cylinder.

8. A multi-channel 3D printer head, comprising a plurality of 2-channel 3D printer heads according to any one of claims 1 to 7 in parallel.

Technical Field

The invention relates to a 3D printer nozzle, in particular to a 3D printer nozzle with a multi-material flow channel.

Background

The injector type 3D printer shown in fig. 1 can print thin or viscous fluid materials, has a simple and cheap structure, is easy to clean and replace, is widely used for 3D printing and forming of biomedical devices and complex functional structural members, but the 3D printer usually only has one injector type nozzle and one material flow passage, and can only print one material. How to realize multi-material printing by using an injector type 3D printer is an important subject facing the additive manufacturing industry.

One prior art solution to the above problem is to provide a syringe magazine on the right side of the printer, as shown in fig. 2, in which a plurality of syringes are provided, each syringe being filled with a different fluid material, and a syringe is mounted on the head, and a fluid material is provided therein, and after the head prints a desired pattern, the printer drives the head to automatically move to above the syringe magazine, removes the syringe from the head, selects another syringe from the syringe magazine, and automatically mounts it on the head, and then the head returns to a working position to print a second fluid material. The method can realize printing of multiple materials, but the injector needs to be replaced back and forth, the structure is complex, the time is wasted, and the printing efficiency is not high.

Another prior art solution to the above problem is to provide a plurality of laterally juxtaposed injectors on the head of the printer, each injector injecting a different fluid material, as shown in fig. 3. During printing, each injector works in turn to print different materials. This method can realize printing of multiple materials, but requires frequent replacement of the syringes for printing, and it is necessary to ensure that the nozzles at the lower end of each syringe are at the same height, otherwise printing failure or defective surface quality of the printed product may occur. In actual printing, the nozzle has to be replaced because the aperture size of the nozzle needs to be changed according to the viscosity of the fluid material, however, the length of the purchased nozzle cannot be ensured to be constant, so a complex height aligning mechanism is required, otherwise, the nozzle of each injector is difficult to ensure to be at the same height. Another disadvantage of this solution is that, in order to be able to arrange a plurality of syringes laterally, only syringes with small diameter and volume can be used, and therefore long-term continuous printing cannot be achieved.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

The invention aims to solve the problems and provides a multi-channel 3D printer nozzle, wherein a plurality of material channels are arranged in the nozzle, all the channels are collected into a common nozzle, and the high-speed electromagnetic valve and a barrier are used for realizing the quick on-off switching of the channels, so that the 3D printing of multiple materials is completed.

The technical scheme of the invention is as follows: the invention discloses a 2-flow-channel 3D printer nozzle, which comprises two injectors, two flow channels, a nozzle, a separator, two feeding cylinders and two electromagnetic valves, wherein:

a first injector and a second injector for injecting fluid material;

the first flow channel and the second flow channel are used for flowing the fluid material;

the nozzle is used for collecting the first flow channel and the second flow channel;

the separator is used for separating the first flow passage and the second flow passage;

first and second supply cylinders for supplying fluent material to the first and second injectors;

the first electromagnetic valve and the second electromagnetic valve are used for controlling the injection of the fluid material;

the on-off switching between the first flow channel and the second flow channel is controlled through the first electromagnetic valve, the second electromagnetic valve and the blocking device, so that the same nozzle can print multiple kinds of fluid materials.

According to an embodiment of the 2-channel 3D printer head of the present invention, the upper inlet of the first injector is communicated with the lower outlet of the first supply cylinder, and the lower outlet of the first injector is communicated with the upper inlet of the first channel; the upper inlet of the second injector is communicated with the lower outlet of the second feeding cylinder, and the lower outlet of the second injector is communicated with the upper inlet of the second flow passage.

According to an embodiment of the 2-channel 3D printer head, the lower outlet of the first channel and the lower outlet of the second channel are merged and then communicated with the inner hole of the nozzle.

According to one embodiment of the 2-flow-channel 3D printer nozzle, the blocking device consists of a micro cylinder, a connecting plate, a blocking bolt, a transverse hole and a plug; the overhanging piston rod of micro cylinder is connected with the connecting plate, 2 air inlets of micro cylinder are connected with 2 lower openings of second solenoid valve respectively, the lower extreme of connecting plate is connected with the middle section that the separation was tied, the surface and the cross bore cooperation that the separation was tied so that the separation can be followed left right direction reciprocating motion in the cross bore, the upper segment of the relative first runner of cross bore and second runner is the vertical layout, two end caps are located both ends about the cross bore respectively for the side-to-side motion that the separation was tied is spacing.

According to an embodiment of the 2-channel 3D printer head, the blocking bolt is a cylindrical rubber piece.

According to an embodiment of the 2-channel 3D printer head of the present invention, the upper ports of the first and second supply cylinders are respectively connected to the two lower ports of the first solenoid valve.

According to one embodiment of the 2-channel 3D printer nozzle, inlets of the first electromagnetic valve and the second electromagnetic valve are communicated with a compressed air source, and an outlet of the second electromagnetic valve is connected with the micro cylinder.

The invention also discloses a multi-channel 3D printer nozzle which is characterized by being formed by connecting a plurality of 2-channel 3D printer nozzles in parallel.

Compared with the prior art, the invention has the following beneficial effects: the multi-runner 3D printer nozzle is provided with a plurality of material runners for flowing of various flow state materials, all the runners are collected in a common nozzle, and the high-speed electromagnetic valve and the barrier are used for controlling the quick on-off switching of each runner. Compared with the existing 3D printer nozzle, the invention can print various fluid materials by using one nozzle. In addition, the invention supplies the fluid material to the injector by using the feeding cylinder with large volume, thereby realizing long-time continuous printing.

Drawings

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

Fig. 1 is a schematic structural diagram of a conventional single-syringe type 3D printer.

Fig. 2 is a schematic structural diagram of a conventional 3D printer for implementing multi-material printing by using an injector library.

Fig. 3 is a schematic structural view of a conventional head using a plurality of parallel injectors.

Fig. 4 shows a schematic structural diagram of an embodiment of a 2-channel 3D printer head according to the present invention.

Fig. 5 shows a schematic structural diagram of an embodiment of a 4-channel 3D printer head according to the present invention.

Reference numerals:

1a first Syringe

2a second Syringe

3a first flow channel

15a second flow path

5a nozzle

8a first supply cylinder

9a second supply cylinder

10a first solenoid valve

14a second solenoid valve

6a miniature cylinder

7a connecting plate

4a isolating bolt

17a, 18a plugs

11a compressed air

12a fluid material

13a fluid material

16a cross bore

1b, 2b, 3b, 4b syringes

5b, 6b, 7b, 8b flow channel

9b nozzle

10b, 11b barrier

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 4 shows a schematic structural diagram of an embodiment of a 2-channel 3D printer head according to the present invention. Referring to fig. 4, the 3D printer head with 2 flow channels of the embodiment mainly includes: the injector (including the first injector 1a and the second injector 2a), the flow passage (including the first flow passage 3a and the second flow passage 15a), the nozzle 5a, the blocking device, the supply cylinder (including the first supply cylinder 8a and the second supply cylinder 9a), and the solenoid valve (including the first solenoid valve 10a and the second solenoid valve 14a, both of which are high-speed solenoid valves).

The upper inlet of the first syringe 1a communicates with the lower outlet of the first supply cylinder 8a, and the lower outlet of the first syringe 1a communicates with the upper inlet of the first flow path 3 a. The upper inlet of second syringe 2a communicates with the lower outlet of second supply cylinder 9a, and the lower outlet of second syringe 2a communicates with the upper inlet of second flow passage 15 a.

The lower outlet of the first flow passage 3a and the lower outlet of the second flow passage 15a are merged and then communicated with the inner hole of the nozzle 5 a.

The blocking device consists of a micro cylinder 6a, a connecting plate 7a, a blocking bolt 4a, a transverse hole 16a and plugs 17a and 18 a. The extended piston rod of the microcylinder 6a is connected with the connecting plate 7a, and 2 air inlets of the microcylinder 6a are respectively connected with 2 lower ports of the second electromagnetic valve 14 a. The lower end of the connecting plate 7a is connected with the middle section of the blocking bolt 4a, the blocking bolt 4a is a cylindrical rubber piece, the outer surface of the cylinder is matched with the cross hole 16a so that the blocking bolt 4a can reciprocate in the cross hole 16a in the left-right direction, the cross hole 16a is vertically arranged relative to the upper sections of the first flow channel 3a and the second flow channel 15a, and the two plugs 17a and 18a are respectively located at the left end and the right end of the cross hole 16a and used for limiting the left-right movement of the blocking bolt 4 a.

The upper ports of the first supply cylinder 8a and the second supply cylinder 9a are connected to the two lower ports of the first solenoid valve 10a, respectively.

The inlets of the first solenoid valve 10a and the second solenoid valve 14a are both communicated with a compressed air source, and the outlet of the second solenoid valve 14a is connected with the micro cylinder 6 a.

Referring to fig. 4, when the first solenoid valve 10a is in a de-energized state, compressed air 11a enters the first supply barrel 8a to force the fluidized material 12a therein to flow through the hose therebelow to the first syringe 1 a. Since the second solenoid valve 14a is also in the de-energized state, the compressed air 11a enters the right side of the microcylinder 6a, the left side of the microcylinder 6a is exhausted through the second solenoid valve 14a, the piston of the microcylinder 6a moves leftwards, and the blocking pin 4a is driven by the connecting plate 7a to move leftwards until the left front end of the blocking pin 4a touches the left plug 18a, so that the second flow passage 15a below the second injector 2a is blocked quickly, the first flow passage 3a below the first injector 1a is opened quickly, and the fluid material 12a is ejected to the printer workbench (not shown) through the first injector 1a, the first flow passage 3a and the nozzle 5 a. At this time, the second supply cylinder 9a is in a vented state above, and the fluidized material 13a is not discharged from the nozzle 5a by releasing the air pressure. After printing a layer of desired pattern with fluid material 12a, if fluid material 13a is to be printed, first solenoid valve 10a is switched to the energized state rapidly, the spool moves rightward, and compressed air 11a enters second supply cylinder 9a to force fluid material 13a therein to flow to second injector 2a through the hose therebelow. Meanwhile, the second electromagnetic valve 14a is rapidly switched to an energized state, the valve core moves rightwards, the compressed air 11a enters the left side of the microcylinder 6a, the right side of the microcylinder 6a is exhausted through the second electromagnetic valve 14a, the piston of the microcylinder 6a moves rightwards, the connecting plate 7a drives the blocking bolt 4a to move rightwards until the right front end of the blocking bolt 4a touches the right plug 17a, the first flow passage 3a below the first injector 1a is rapidly blocked, the second flow passage 15a below the second injector 2a is rapidly opened, and the fluid material 13a is injected to a printer workbench (not shown) through the second injector 2a, the second flow passage 15a and the nozzle 5 a. At this time, the upper part of the first supply cylinder 8a is in a gas-exhaust state, and the fluidized material 12a does not flow out from the nozzle 5a by releasing the gas pressure.

After the structure of the above embodiment of the present invention is adopted, when the printing material is changed, the high-speed electromagnetic valve is used to rapidly switch the feeding of the corresponding feeding cylinder and the on-off of the corresponding flow channel (the switching time is less than 1ms), and the position of the second electromagnetic valve 14a is close to the micro cylinder 6a, the action of the piston of the micro cylinder 6a and the blocking bolt 4a is sensitive, the distance from the flow channel closing port to the nozzle 5a is small, and the quality of the fluid material therein is small, so that the clean and real-time rapid switching of the printing material can be realized.

When 4 materials need to be printed, a configuration of two sets of the system shown in fig. 4 in parallel, i.e., the 4-channel 3D printer head embodiment shown in fig. 5, may be employed. Wherein, 4 injectors 1b, 2b, 3b and 4b are respectively injected with 4 different fluid materials, the on-off of the flow passages 5b and 6b is controlled by a baffle 10b, the on-off of the flow passages 7b and 8b is controlled by a baffle 11b, and the flow passages 5b, 6b, 7b and 8b are converged and then communicated with the inner hole of the nozzle 9 b.

Because the 3D print head with the 4 flow channels is actually formed by two sets of 3D print heads with the 2 flow channels in parallel, the specific implementation principle is the same as that of the 3D print head with the 2 flow channels, and details are not repeated here.

Similarly, the 6 runners can adopt 3 sets of structures as shown in fig. 4, and the structures of the multi-runner 3D printer nozzles can be analogized, and the multi-runner 3D printer nozzles are formed by arranging a plurality of sets of 2-runner 3D printer nozzles as shown in fig. 4 in parallel.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.