CN211164451U

CN211164451U - Extrusion device for 3D printer

Info

Publication number: CN211164451U
Application number: CN201921058050.XU
Authority: CN
Inventors: 沈楚敬
Original assignee: Nanjing Xinjing Photoelectric Technology Co ltd
Current assignee: Nanjing Xinjing Photoelectric Technology Co ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-08-04
Anticipated expiration: 2029-07-04

Abstract

Extrusion apparatus for a 3D printer, comprising: an extrusion section and a feed section, wherein the extrusion section comprises: extrude screw rod, be used for the drive to extrude motor, screw valve, the shower nozzle subassembly of screw rod, the feed part includes pressure providing device, thick liquids bucket and feed pipe, it is the variable pitch screw rod to extrude the screw rod, follow the motor arrives in the direction of shower nozzle subassembly, the pitch of extruding the screw rod is by little grow. The utility model discloses a 3D earthenware clay prints extrusion device's screw rod is for becoming the pitch design, for guaranteeing screw rod and shower nozzle junction extrusion force maximum pitch by little grow.

Description

Extrusion device for 3D printer

Technical Field

The utility model belongs to the technical field of 3D prints, concretely relates to extrusion device for 3D printer.

Background

The 3D printing technology is a novel technology which closely combines a virtual intelligent digitization technology and modern industrial production, and can directly generate a three-dimensional object forming technology from a computer model. Since 3D printing is different from traditional techniques of manufacturing finished products from blanks, it is also referred to as additive manufacturing.

As an important development direction of advanced manufacturing technology, 3D printing technology has penetrated into various industries, such as: medical fields, mechanical engineering fields, automobile manufacturing fields, material science fields, construction fields, and the like, and even in the family today, figure images of 3D printing technology are slowly appearing.

With the development of 3D printing technology, a clay pottery 3D printer specially used for ceramic materials has appeared. The ceramic clay 3D printing technology omits the heating of a bottom plate, and the ceramic clay is used as a raw material to be subjected to filament-shaped extrusion deposition molding. Compared with the traditional ceramic production process, the clay 3D printing embodies many advantages, such as: 1. no matter in the gypsum mold casting process or the blank drawing process in the slip casting process, a large amount of manpower is saved in the 3D printing; 2. The requirement on manual technology is reduced to the minimum in the process of pulling and repairing the embryo; 3. 3D printing in the blank repairing process can print more accurate ceramic surface textures.

Since 2013, many commercial clay printers have appeared in succession. The mechanical structure of the clay printer sold in the market at present is divided into: XYZ, delta, gantry. The clay extruding device is not limited to an external large-capacity extruding device and an internal injector type small-capacity extruding device. However, the two modes have the defect of solid-liquid separation of water and ceramic mud in the printing process, so that the printing effect of the product is influenced, and the later maintenance and cleaning of the spray head of the product are very troublesome.

Disclosure of Invention

The utility model discloses a 3D clay printer extrusion device's a main objective mainly lies in for guaranteeing extruding of thick liquids evenly when printing clay thick liquids for print the effect optimization. Therefore, the following technical scheme is adopted:

extrusion apparatus for a 3D printer, comprising: an extrusion section and a feed section, wherein the extrusion section comprises: extrude screw rod, be used for the drive to extrude motor, screw valve, the shower nozzle subassembly of screw rod, the feed part includes pressure providing device, thick liquids bucket and feed pipe, it is the variable pitch screw rod to extrude the screw rod, follow the motor arrives in the direction of shower nozzle subassembly, the pitch of extruding the screw rod is by little grow.

Further, the diameter of the extrusion screw is gradually reduced from the motor to the spray head assembly.

Further, the extrusion device also comprises a heating device for heating the slurry in the slurry barrel.

Further, the extrusion apparatus further comprises: and the temperature detection element is used for detecting the temperature of the heated slurry.

Further, the pressure providing device is connected with the slurry barrel through an air inlet.

Further, the spray head assembly includes a spray head nozzle and a spray head, and both the spray head nozzle and the spray head are replaceable.

Further, the extrusion part also comprises a motor fixing support used for fixing a motor; and/or the screw valve is fixed on a screw valve fixing support.

Further, a sealing ring is arranged between the screw valve and the screw valve fixing support.

Further, a Teflon pipe is arranged in the screw valve, and the screw valve is in interference fit with the Teflon pipe.

Further, the heating device adopts a heating coil, and the temperature detection element adopts a temperature sensor.

Therefore, compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a 3D earthenware clay prints extrusion device's screw rod is for becoming the pitch design, for guaranteeing screw rod and shower nozzle junction extrusion force maximum pitch by little grow.

2. In order to ensure smooth extrusion of the clay slurry, the screw is designed to be variable in diameter, the diameter is changed from large to small from a motor to the spray head, and a certain gap is ensured between the screw and a Teflon pipe embedded in the screw valve.

3. The utility model discloses 3D clay prints extrusion device is for satisfying the market current different types shower nozzle most commonly used, and the shower nozzle design is the form of can replacing.

4. The utility model discloses earthenware clay 3D prints extrusion device's feed cylinder and links to each other with air pressure controller, and reuse air pressure controller links to each other with the air compressor machine. The pressure controller can automatically adjust the pressure under the condition of different viscosities of the slurry, thereby ensuring the smooth extrusion of the slurry.

5. Through setting up heating device and temperature-detecting device can reduce moisture, adjust the consistency of thick liquids.

Drawings

In order to illustrate the technical solution of the embodiment of the 3D clay printer extrusion device of the present invention more clearly, the following will combine the drawings to describe the 3D clay printer extrusion device of the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 is the utility model discloses 3D clay printer extrusion device's whole cross-sectional view.

Fig. 2 is the utility model discloses 3D clay printer extrusion device's work flow chart.

Detailed Description

The utility model discloses an extrusion device of 3D printer is described below with the accompanying drawing. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the extrusion apparatus for a 3D printer according to the present invention is mainly composed of an extrusion part and a feeding part, wherein the extrusion part includes a motor 1 for driving an extrusion screw, an extrusion screw 3, a screw valve 5, a nozzle assembly, etc.; the feeding portion includes an air compressor (not shown), a pressure controller (not shown), an air inlet 9, a pulp barrel 10, a feed pipe 11, and the like.

Further, the extrusion part further comprises a fixing support 2 for fixing the motor 1. The motor 1 is connected with the extrusion screw 3. Preferably, the extrusion screw 3 is a screw with a gradually changing pitch. The extrusion screw 3 extends into the screw valve 5; the screw valve 5 is fixed on the screw valve fixing support 4.

Further, the extrusion screw 3 is of a variable pitch structure, and the pitch is changed in a mode that the pitch is changed from small to large from the direction from the motor to the direction close to the spray head assembly.

As for the existing clay 3D printing technology, the defect of water and clay solid-liquid separation in the printing process exists, the product printing effect is influenced, and the later maintenance and cleaning of a product nozzle are greatly disturbed. And according to the utility model discloses a 3D clay printer extrusion device, for preventing that atmospheric pressure from too big moisture and the clay solid-liquid separation that causes in the clay thick liquids, the pitch of screw rod is from motor to shower nozzle subassembly direction by little grow, consequently is being close the extrusion force increase of shower nozzle subassembly afterbody, even also can make the clay thick liquids extrude smoothly under the very little circumstances of invariable atmospheric pressure, helps guaranteeing to print the effect.

Further, the diameter of the extrusion screw 3 is also varied. Here, the diameter of the extrusion screw 3 is defined as the diameter of the outermost peripheral profile thereof as viewed from the axial direction. Specifically, the diameter of the extrusion screw 3 is made smaller from the larger in the direction from the motor to the head assembly. The diameter-variable structure can also help the clay slurry to be smoothly extruded.

The lower end of the screw valve 5 is connected with a spray head assembly. The spray head assembly mainly comprises a spray head nozzle 7 and a spray head 8. Preferably, both the nozzle 7 and the spray head 8 are replaceable.

In the feeding portion, the air compressor outputs compressed air to the pressure controller, and the pressure controller inputs a constant air pressure into the pulp barrel 10 through the air inlet 9, so that the pulp in the pulp barrel 10 is inputted into the screw valve 5 through the feed pipe 11.

Specifically, the supply tube 11 may be an 1/8 ninety degree tube nipple. Of course, other types of feed pipes may be used as long as they can feed the slurry to the screw valve 5.

In order to ensure the sealing performance of the whole ceramic clay 3D printing and extruding device under the conditions of minimized structure and lightest weight, a sealing ring 12 is pressed between the screw valve 5 and the screw valve fixing support 4, and the sealing ring 12 is tightly pressed between the screw valve 5 and the screw valve fixing support 4 by virtue of the connection between the screw valve 5 and the screw valve fixing support 4.

As a preferred embodiment of the present invention, the extrusion screw 3 and the screw valve 5 are made of nylon + glass fiber material. Similarly, the screw valve fixing support 4 and the motor fixing support 2 can also be made of nylon and glass fiber materials.

In order to ensure that the resistance of the slurry in the screw valve 5 is reduced, a Teflon pipe 6 is embedded in the screw valve 5, and the screw valve 5 is in interference fit with the Teflon pipe 6.

Because the thick liquids kind that extrusion device extruded is numerous, and the characteristic between each thick liquids is different, consequently, for guaranteeing that extrusion device can satisfy the thick liquids of different material characteristics, the utility model discloses a shower nozzle mouth 7 among the extrusion device designs for replaceable shower nozzle mouth 7, can change corresponding shower nozzle according to the characteristic of thick liquids from this.

Further, the replaceable nozzle 8 is made of nylon + glass fiber material.

As an important improvement of the present invention, a heating device 13 is provided on the extrusion device. In this way, when the slurry material supplied from the slurry tank 10 contains a large amount of water and the slurry is thin, the slurry can be heated by the heating device 13. When the heating device 13 is operated for a certain period of time, the operation is stopped.

Further, a temperature detecting element 14 may be provided for cooperating with the heating device 13. When the heating device 13 works, the temperature detection element 14 detects the temperature of the slurry in real time; when a preset stability is reached, the heating device 13 stops operating.

Preferably, the heating device 13 employs a heating coil. The temperature detection element 14 employs a temperature sensor.

Further, a control device is provided, in which the corresponding temperatures for the slurries of different characteristics are preset.

The utility model discloses 3D clay prints extrusion device adopts motor and the direct rigid connection of screw rod, and the D word axle of motor inserts and fastens with the jackscrew in the screw rod of design by oneself, reduces whole practical clay extrusion device's complexity.

The utility model discloses 3D clay is printed nonstandard design number of pieces of extrusion device and is 3 the processing cost that has significantly reduced, directly links the screw-rod valve through 90 degrees elbows with the material bucket, reduces the overall arrangement space in the lightweight.

Fig. 2 shows the utility model discloses a clay 3D printer extrusion device's work flow chart: firstly, outputting air pressure in an air compressor to a constant pressure controller, and then outputting constant pressure by the constant pressure controller to extrude slurry from a charging barrel to a replaceable nozzle; and then, the motor is electrified to drive the extrusion screw to work, and the slurry is extruded from the replaceable spray head 8 by the spray head component under the action of the constant pressure and the extrusion force of the extrusion screw 3 with the gradually-changed pitch. In the process, if the slurry is too thin, the heating device starts to work, the heating coil stops heating when the temperature sensor senses that the temperature is heated to a certain temperature value, and finally the slurry is extruded, deposited and molded under the action of air pressure and screw extrusion force.

It is right above that the utility model discloses a structure and working process have made clear complete explanation, and the skilled person in the field can realize according to this above description the utility model discloses a scheme.

Claims

1. Extrusion apparatus for a 3D printer, comprising: an extrusion section and a feed section, wherein the extrusion section comprises: extrude screw (3), be used for the drive to extrude motor (1), screw valve (5), the shower nozzle subassembly of screw, the feed portion includes pressure providing device, thick liquids bucket (10) and feed pipe (11), its characterized in that, extrude screw (3) and be variable pitch screw, follow motor (1) extremely in the direction of shower nozzle subassembly, the pitch of extruding screw (3) is by little grow.

2. The extrusion apparatus for a 3D printer according to claim 1, wherein the diameter of the extrusion screw (3) decreases from the larger to the smaller in the direction from the motor (1) to the head assembly.

3. The extrusion apparatus for a 3D printer according to claim 1, further comprising a heating device for heating the slurry in the slurry barrel (10).

4. The extrusion apparatus for a 3D printer according to claim 3, further comprising: and the temperature detection element is used for detecting the temperature of the heated slurry.

5. Extrusion apparatus for a 3D printer according to any one of claims 1 to 4, characterized in that the pressure providing means is connected to the pulp barrel (10) through an air inlet (9).

6. Extrusion apparatus for 3D printer according to any of claims 1-4, characterized in that the jet head assembly comprises a jet head nozzle (7) and a jet head (8), and that both the jet head nozzle (7) and the jet head (8) are replaceable.

7. The extrusion apparatus for a 3D printer according to any one of claims 1-4, wherein the extrusion part further comprises a motor fixing mount (2) for fixing a motor (1); and/or the screw valve (5) is fixed on the screw valve fixed support (4).

8. Extrusion apparatus for 3D printer according to claim 7, characterized in that a sealing ring (12) is provided between the screw valve (5) and the screw valve fixing support (4).

9. The extrusion device for a 3D printer according to any one of claims 1 to 4, characterized in that a Teflon tube (6) is provided in the screw valve (5), and the screw valve (5) is in interference fit with the Teflon tube (6).

10. The extrusion apparatus for a 3D printer according to claim 4, wherein the heating apparatus employs a heating coil, and the temperature detection element employs a temperature sensor.