CN113910409B

CN113910409B - Remote extrusion device for 3D printing equipment

Info

Publication number: CN113910409B
Application number: CN202111237480.XA
Authority: CN
Inventors: 吴东蔚; 庞舒敏; 吴德昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-04-11
Anticipated expiration: 2041-10-27
Also published as: CN113910409A

Abstract

The invention discloses a remote extrusion device for 3D printing equipment. Driving motor links to each other with the biography power pipe, and the biography power pipe passes through the connector with the feed cylinder of taking the plunger to realize that driving motor's action can be through the feed cylinder of biography power pipe transmission to taking the plunger, extrude the material and carry out 3D and print. The device has realized the separation of driving motor and feed cylinder, and the feed cylinder can be directly fixed in on the removal module of 3D printer, need not connect the nozzle through the conveying pipeline, material saving. On driving motor can be fixed in 3D printer frame, alleviateed 3D printer removal module's load and the production of vibration greatly, be favorable to the rapid stabilization motion of 3D printer removal module. By using the remote extrusion device, materials can be saved, high-speed 3D printing work can be realized, and the printing accuracy is ensured.

Description

Remote extrusion device for 3D printing equipment

Technical Field

The invention relates to the technical field of 3D printers, in particular to a remote extrusion device for 3D printing equipment.

Background

3D printing is an advanced additive manufacturing technique that finds application in more and more fields. Extrusion-based 3D printing techniques were first developed for additive manufacturing of geometrically complex ceramic bodies and have in recent years been rapidly used in a wide range of fields, in particular in extrusion-based 3D printing, and are very widely used. Because the ink can print materials with wide viscosity range, the compatibility is good, the cost is low, the operation is simple, and the ink is favored by more and more users. The extrusion 3D printing generally uses mechanical force or air pressure as a driving force, and can be mainly achieved by the following methods: pneumatic extrusion, piston extrusion, and screw extrusion. Wherein, the piston extrusion formula has combined that pneumatic extrusion formula is simple to use, clean convenient to and the screw rod is extruded the formula and is easily controlled, advantage that stability is high, consequently is favorable to the change of different materials to be used, and the realization that high accuracy 3D printed.

Piston-extrusion 3D printing relies on mechanical force, typically provided by a drive motor, to drive a piston to force the extrusion of material. Therefore, such 3D printer is that parts such as motor, feed cylinder, extrusion head are fixed to the print head together usually, lead to beating printer head motion module's weight and increase by a wide margin, not only be unfavorable for beating the quick travel of printer head, still lead to the holistic vibrations of printer easily, seriously influence the effect of printing. To address this problem, some researchers and manufacturers have attached extrusion devices to the printer frame, including a motor and a cartridge that is connected to the printhead via a conduit to effect the transport of material. The design reduces the weight of the printing head movement module, but the defect is obvious that the material must be filled in the conduit to reach the printing head for extrusion, and the material in the conduit is difficult to utilize after printing is finished, so that the corresponding part of the material in the conduit is wasted.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to develop an extrusion device that is easy to use, saves materials, and does not increase the weight of the print head moving module.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention aims to provide the remote extrusion device for the 3D printer, which ensures the light weight of the movement module of the printing head on the basis of piston extrusion, improves the movement sensitivity of the movement module, has the advantages of high stability, good compatibility, low cost, simple operation, material saving and the like, and can effectively solve the problems explained in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a long-range extrusion device for 3D printing apparatus, includes driving motor, biography power pipe, takes feed cylinder, the connector of plunger. The driving motor is fixed on the 3D printer frame and can be a common driving motor combined with a linear sliding rail or a penetrating type screw motor. The force transmission pipe is a nested structure capable of being bent freely, and a rigid sphere matched with the inner diameter of the force transmission pipe is arranged in the force transmission pipe. The force transmission pipe is not compressible or stretchable, and the rigid spheres are spherical, so that the length of the central connecting line of all the rigid spheres can be kept unchanged when the force transmission pipe is bent, and the axial moving distance of the rigid spheres is accurately transmitted in the motion process of the printing head. The charging barrel with the plunger is connected with the tail end of the force transmission pipe through the connector. A straight rod connecting structure is arranged at the position where the force transfer tube is connected with the material cylinder, and the straight rod is used for connecting the rigid sphere with the plunger. In the printing process, when materials need to be extruded, the screw rod is driven to rotate by the driving motor, so that the rigid sphere in the force transmission pipe is pushed to move, the movement of the rigid sphere at the front end of the force transmission pipe is transmitted to the rigid sphere at the tail end of the force transmission pipe, and the movement is further transmitted to the plunger of the charging barrel through the straight rod, so that the needed materials can be correspondingly extruded.

The size and the length of the force transmission pipe can be adjusted, the guide pipes with different diameters and lengths can be replaced according to actual needs, and the rigid spheres with matched diameters and numbers can be used.

The size of feed cylinder can be changed, change simultaneously the matching the connector with the plunger can.

Preferably, in order to improve the extrusion precision, the screw of the driving motor is preferably provided with a smaller screw pitch, or the driving motor is provided with a reducer, so that the extrusion precision can be improved, the torque can be increased, and the extrusion of a material with higher viscosity is facilitated.

Preferably, a position sensor is arranged at the position of a connector between the tail end of the force transmission pipe and the charging barrel and used for sensing the position of the straight rod, so that the functions of detecting the accuracy of the extruding position, automatically stopping the charging barrel when the charging barrel is used up and the like can be realized.

Preferably, a temperature control device is arranged outside the charging barrel, so that the temperature of materials in the charging barrel is reduced or increased, and the requirements of printing conditions of different materials are met.

Preferably, the rigid sphere in the force-transmitting tube may be a wire which is bendable but not compressible or stretchable, and the rotation of the motor is converted into axial movement of the wire, thereby driving the movement of the plunger at the end, and simultaneously achieving the functions of material extrusion and material withdrawal.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts a strategy of separating the charging barrel from the driving motor, and controls the movement of the plunger of the charging barrel through remote transmission displacement, thereby realizing the extrusion of materials. The driving motor is fixed on the 3D printer frame, so that the quality of a printer motion module is reduced, the printing head is more sensitive to move, and high-speed printing and stable work of the 3D printer are facilitated. In addition, the material barrel is fixed on the printing head movement module, the tail end of the material barrel is directly connected with the nozzle, so that the extrusion of materials is realized, and the material waste and the increase of resistance caused by the material conveying of a conduit are avoided.

Drawings

Fig. 1 is a schematic view of a remote extrusion device for a 3D printing apparatus.

Fig. 2 is a schematic view of a drive motor end of a remote extrusion device for a 3D printing apparatus.

Fig. 3 a schematic view of a cartridge end of a remote extrusion device for a 3D printing apparatus.

Fig. 4 is a schematic cross-sectional view of a drive motor end of a remote extrusion device force transmission tube for a 3D printing apparatus.

Fig. 5 is a schematic cross-sectional view of a force transfer tube cartridge end of a remote extrusion device for use in a 3D printing apparatus.

Fig. 6 is a schematic diagram of a bendable wire inside a force transfer tube of a remote extrusion device for a 3D printing apparatus.

Description of reference numerals:

1: driving motor

2: force transmission tube

3: charging barrel

4: connector head

5: screw rod

6: rigid ball

7: plunger piston

8: straight rod

9: wire for replacing rigid sphere in force transmission pipe

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings and specific examples, but the invention is not limited in its practical application to the embodiments illustrated. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example 1

As shown in FIG. 1, the invention discloses a remote extrusion device for a 3D printing device, which comprises a driving motor 1, a force transmission pipe 2, a charging barrel 3, a connector 4 and a screw 5. The driving motor 1 is a through type 42 stepping motor, and the screw 5 is inserted into the driving motor 1, so that the driving motor 1 can control the axial movement of the screw 5. Driving motor 1 with the one end of dowel steel pipe 2 connect, the other end of dowel steel pipe 2 with connector 4 link to each other, and feed cylinder 3 is fixed through connector 4 to driving motor 1, dowel steel pipe 2, feed cylinder 3, connector 4 and screw rod 5 connect into a whole.

Fig. 4 shows the internal structures of the driving motor 1 and the force transmission pipe 2, the inside of the force transmission pipe 2 is filled with a steel ball 6 matched with the inner diameter of the force transmission pipe 2, and the steel ball 6 is directly contacted with the screw rod 5. The steel balls in the force transmission pipe 2 are tightly connected. Fig. 5 shows the structure of the force transfer tube 2, the connection head 4 and the interior of the cartridge 3. The plunger 7 is arranged in the charging barrel 3, the lower end of the plunger 7 is contacted with materials in the charging barrel, the upper end of the plunger is connected with the lower end of a straight rod 8 penetrating through the connector 4, and the upper end of the straight rod 8 is contacted with a steel ball 6 in the dowel tube 2. Thus, there is no gap between the screw 5, the ball, the plunger, and the material, and the parts are in intimate contact. When the driving motor 1 receives a signal that a 3D printer mainboard needs to extrude a material, the screw rod 5 can be driven to move in the axial direction, and the screw rod 5 moves in the axial direction to push a steel ball which is in contact with the lower end of the screw rod 5 in the force transmission pipe 2 to move stably in the pipe. Because the steel ball in the force transmission pipe 2 is in close contact with the straight rod, the diameter of the steel ball is matched with the inner diameter of the force transmission pipe 2, the movement of the steel ball at the uppermost end in the force transmission pipe 2 is directly transmitted to the steel ball at the lowermost end through the steel ball in the pipe, and the steel ball at the lowermost end is directly connected with the straight rod 8, so that the movement is further transmitted to the plunger 7, and under the driving of the plunger 7, the material in the material cylinder 3 is extruded as required, thereby meeting the requirement of 3D printing.

The discharge end of the charging barrel 3 can be connected with various types of spray heads, so that the extrusion of materials is controlled, and extruded strand silk with required size is obtained for 3D printing.

Example 2

Referring to fig. 6, on the basis of embodiment 1, the steel ball in the force transmission tube 2 can be changed into a bendable wire 9 with a diameter matched with the inner diameter of the force transmission tube 2. Not only can accomplish driving motor 1 drive screw 5, the motion is transmitted through the wire rod 9 in the biography power pipe 2, realizes that the material is extruded, can also satisfy driving motor 1 and pull back screw rod 5, and the action of pulling back can be transmitted to plunger 7 through the wire rod 9 in the biography power pipe 2 equally on, the material is taken back under the action of pulling back of plunger 7, has realized extruding type 3D and has printed the function of pulling back.

The above description is only for the purpose of illustrating the basic principles and embodiments of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can make various modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A remote extrusion device for 3D printing equipment is characterized in that a driving motor is connected with a force transmission pipe, and the force transmission pipe is connected with a charging barrel with a plunger through a connector;

the driving motor transmits motion to the charging barrel with the plunger through the force transmission pipe to realize remote extrusion of materials in a 3D printing process, and is characterized in that the driving motor can be a through type screw rod stepping motor, can also be a common screw rod stepping motor matched with a sliding rail for use, and can also be a motor for transmitting through a belt, the force transmission pipe is prepared from a material which can be bent and can keep axial rigidity, the obvious axial deformation can not occur in the motion transmission process, the precision of motion transmission is ensured, the inner wall of the force transmission pipe has excellent wear-resisting property, and a rigid sphere with the diameter matched with the inner diameter of the force transmission pipe or a wire rod which can be bent but can not be stretched or compressed is arranged in the force transmission pipe.

2. The remote extrusion apparatus of claim 1, wherein: the rigid sphere is not deformed by force, and the bendable wire has excellent anti-deformation capability in the axial direction.

3. The remote extrusion apparatus of claim 1, wherein: the feed cylinder of taking the plunger be fixed in the connector through rotatory buckle on, the connector on rotatory buckle with the feed cylinder of taking the plunger size match to can change as required, satisfy the operation requirement of different feed cylinders.

4. The remote extrusion apparatus of claim 1, wherein: the outer wall of the charging barrel with the plunger can be provided with a temperature control module, so that the heat preservation function of the material is realized.