CN111376479A - A scraper device for a 3D printer - Google Patents

Abstract

The invention relates to the technical field of 3D printing, and specifically discloses a scraper device for a 3D printer. The scraper device includes a lateral movement module and a scraper installation module arranged on the lateral movement module, and a scraper is installed on the scraper installation module. The scraper is plate-shaped, the upper end of the scraper is mounted on the scraper installation module, the lower end of the scraper is provided with a first bevel, the middle of the scraper is recessed inward, and the left and right ends of the scraper are respectively inclined inward to form a second bevel and the third bevel angle; the present invention sets the first bevel angle, the second bevel angle and the third bevel angle respectively at the lower end and the left and right ends of the scraper, and the setting of the first bevel angle can ensure that the viscous molding material will not be in the scraper. It can also scrape the molding material with high viscosity. The setting of the second bevel angle and the third bevel angle can gather the molding material to the center to achieve better printing effect.

Description

A scraper device for a 3D printer

technical field

The invention relates to the technical field of 3D printing, in particular to a scraper device for a 3D printer.

Background technique

In 3D printing equipment, for light-cured molding materials, after printing one layer, a scraper is usually required to smooth the uneven positions that may exist in the new layer to be formed. In the prior art, a scraper with vacuum adsorption is used, that is, there is a hollow groove inside the scraper, and the molding material can be adsorbed in the hollow groove of the scraper by the method of negative pressure, and the uneven position on the layer to be formed can be filled to realize Flattening of the layer to be formed.

In practical applications, it is found that the existing vacuum suction blade is very suitable for liquid molding materials with low viscosity, but when the viscosity of the liquid molding material is high, the siphon formed by the liquid tension no longer occurs at the blade edge. It is not only impossible to flatten the molding material with this kind of scraper, but also it is easy to make the molding material with high viscosity adhere to the scraper, and the ideal scraping effect cannot be achieved.

SUMMARY OF THE INVENTION

In view of the above technical problems, the present invention provides a scraper device for a 3D printer, which can ensure that the viscous molding material will not accumulate on the scraper, and can also scrape the thicker molding material, and achieve better printing. Effect.

In order to solve the above-mentioned technical problems, the specific scheme provided by the present invention is as follows:

A scraper device for a 3D printer, the scraper device comprises a lateral movement module and a scraper installation module arranged on the lateral movement module, and a scraper is installed on the scraper installation module;

The scraper is plate-shaped, the upper end of the scraper is installed on the scraper installation module, the lower end of the scraper is provided with a first bevel, the middle of the scraper is recessed inward, and the left and right ends of the scraper are respectively inclined inward to form a second bevel and Third bevel.

Optionally, the scraper mounting module includes a scraper mounting frame and a scraper adjusting assembly, one end of the scraper mounting frame is connected to the lateral movement module, and the other end of the scraper mounting frame is connected to the scraper adjusting assembly, and the scraper is arranged on the scraper adjusting assembly. On the top, the position of the scraper is adjusted and fixed by the scraper adjustment component, which has strong operability and flexibility.

Optionally, the scraper adjusting assembly includes a height-adjusting plate, a mounting plate and a first connecting screw;

The scraper is mounted on the mounting plate, the mounting plate is arranged on the height-adjusting plate, and the first connecting screw connects the mounting plate and the height-adjusting plate;

The height-adjusting plate is connected with the scraper installation frame, the installation plate defines the position of the scraper, and the height-adjusting plate can adjust the height and low position of the scraper, and has strong operability and flexibility.

Optionally, the height adjustment plate is provided with threaded holes, the scraper mounting frame is provided with connection holes corresponding to the threaded holes, and a second connection screw is arranged between the threaded holes and the connection holes, and the threaded holes pass through the threaded holes. , a connecting hole and a second connecting screw to realize the position adjustment of the height-adjusting plate.

Optionally, the scraper mounting frame is also provided with a top tightening hole, the top tightening hole is provided with a thread, and a top tightening screw is screwed into the top tightening hole, which can stabilize the height adjustment plate and improve the overall use stability. sex.

Optionally, the height-adjusting plate is provided with a groove, and the mounting plate is provided with a convex strip corresponding to the groove, which facilitates the positioning and installation of the mounting plate, and also facilitates the disassembly of the mounting plate.

Optionally, the lateral movement module includes a fixed base plate, a stepping motor, a coupling, a lead screw and a mounting seat;

The fixed base plate is provided with a stepper motor mounting end and a lead screw fixed end, the stepper motor is mounted on the stepper motor mount end, and the lead screw is mounted on the lead screw fixed end;

The stepping motor is connected to a coupling, the coupling is connected to a screw rod, and the screw rod is connected to a mounting seat;

The mounting seat is connected to the scraper mounting module, and the lateral movement of the mounting seat is realized under the joint action of the stepping motor, the coupling and the screw rod.

Optionally, the scraper device further includes a feeding module, the feeding module includes a pump body and a feeding part, and the pump body and the feeding part are connected by a pipeline;

The feeding part is located at the lower end of the scraper installation module, the pump body sends the molding material to the feeding part through the pipeline, and the molding material flows out through the feeding part.

Optionally, a plurality of feeding troughs are arranged inside the feeding member, and a plurality of connecting ports respectively communicated with the plurality of feeding troughs are arranged on the upper end of the feeding member;

The pipeline is connected with the connection port to realize the provision of multi-component molding materials.

Optionally, the number of the feeding troughs is the same as the number of the pump bodies, and one pump body corresponds to one feeding trough, so as to realize the printing function of the multi-component molding material.

Compared with the prior art, the beneficial effect of the present invention is that: the present invention is provided with a first bevel, a second bevel and a third bevel at the lower end and the left and right ends of the scraper, respectively, and the setting of the first bevel can ensure the adhesion of the scraper. The thick molding material will not accumulate on the scraper, and it can also scrape the thicker molding material. The setting of the second bevel and the third bevel can gather the molding material to the center to achieve better printing results.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a scraper device of a 3D printer provided in an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a scraper provided in an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a height-adjusting board and a mounting board provided in an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a scraper mounting frame provided in an embodiment of the present invention.

FIG. 5 is a schematic diagram of the overall structure of a scraper device of another 3D printer provided in an embodiment of the present invention.

6 is a schematic structural diagram of a feeding module provided in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a feeding member provided in an embodiment of the present invention.

21 is a fixed base plate; 22 is a stepping motor; 23 is a coupling; 24 is a screw rod; 25 is a mounting seat; 26 is a stepping motor mounting end; 27 3 is the fixed end of the screw rod; 3 is the scraper installation module; 31 is the scraper mounting frame; 311 is the connecting hole; 312 is the top tightening hole; 32 is the scraper adjustment component; 322 is the mounting plate; 3221 is the protruding strip; 323 is the first connecting screw; 4 is the scraper; 41 is the first bevel; 42 is the second bevel; 43 is the third bevel; 5 is the feeding module; 51 52 is the feeding part; 521 is the feeding groove; 522 is the connecting port.

Detailed ways

In order to describe the technical solutions of the present invention in detail, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

For example, a scraper device of a 3D printer, the scraper device includes a lateral movement module and a scraper installation module arranged on the lateral movement module, and a scraper is installed on the scraper installation module; the scraper is plate-shaped, and the scraper is The upper end of the scraper is installed on the scraper installation module, the lower end of the scraper is provided with a first bevel, the middle of the scraper is recessed inward, and the left and right ends of the scraper are respectively inclined inward to form a second bevel and a third bevel.

This embodiment provides a scraper device for a 3D printer. The lower end and the left and right ends of the scraper are respectively provided with a first bevel, a second bevel, and a third bevel, and the setting of the first bevel can ensure viscous molding. The material will not accumulate on the scraper, and it can also scrape the molding material with high viscosity. The setting of the second bevel angle and the third bevel angle can gather the molding material to the center to achieve better printing effect.

Please refer to FIG. 1 and FIG. 2. FIG. 1 shows a schematic diagram of the overall structure of a scraper device of a 3D printer; FIG. 2 shows a schematic diagram of the structure of a scraper.

As shown in Figures 1 and 2, the scraper device includes a lateral movement module, the lateral movement module is provided with a scraper installation module, the scraper is installed on the scraper installation module, and the lateral movement module can drive the scraper installation module to move laterally, In turn, the lateral movement of the scraper is driven.

In this example, the scraper is plate-shaped, the upper end of the scraper is mounted on the scraper installation module, the lower end of the scraper is provided with a first bevel, the middle of the scraper is recessed inward, and the left and right ends of the scraper are respectively inclined inward to form a second bevel. Bevel and third bevel. When the scraper scrapes the molding material, the inclined setting of the first bevel angle prevents the molding material from accumulating on the scraper; usually, during the scraping process of the scraper, the molding material will overflow to both ends, and the second bevel angle The setting of the third bevel angle and the second bevel angle solves this problem very well. When the scraper is scraped, the second bevel angle and the third bevel angle make the molding material gather toward the center to achieve better smoothing and printing effects.

In some embodiments, the scraper mounting module includes a scraper mounting bracket and a scraper adjustment assembly, one end of the scraper mounting bracket is connected to the lateral movement module, the other end of the scraper mounting bracket is connected to the scraper adjustment assembly, and the scraper is arranged on the scraper. On the adjustment assembly, the position of the scraper is adjusted and fixed through the scraper adjustment assembly, which has strong operability and flexibility

Specifically, one end of the scraper mounting frame is connected to the lateral movement module, and is fixed by screws to improve the stability of the scraper during lateral movement, and the scraper will not shake up and down during the smoothing process.

In some embodiments, the scraper adjusting assembly includes a height-adjusting plate, a mounting plate and a first connecting screw; the scraper is mounted on the mounting plate, the mounting plate is arranged on the height-adjusting plate, and the first connecting screw The installation plate and the height-adjusting plate are connected; the height-adjusting plate is connected with the scraper mounting frame, the installation plate defines the position of the scraper, and the height-adjusting plate can adjust the height and low position of the scraper, and has strong operability and flexibility.

The upper end of the scraper is provided with a mounting hole, and the mounting plate is provided with a mounting position corresponding to the mounting hole. After aligning the mounting hole with the mounting position, the positions of the scraper and the mounting plate are locked by screws, so that the scraper is fixed on the mounting plate. , the mounting plate is fixedly installed on the height-adjusting plate through the first connecting screw, and the height-adjusting plate and the scraper mounting frame are detachably connected.

By adjusting the position of the height-adjusting plate, the height of the scraper can be adjusted, as shown in Figures 3 and 4. In this example, the height-adjusting plate is provided with threaded holes, and the scraper mounting frame is provided with There is a connection hole corresponding to the threaded hole, a second connection screw is arranged between the threaded hole and the connection hole, and the position adjustment of the height adjustment plate is realized through the threaded hole, the connection hole and the second connection screw. When the position of the height-adjusting plate needs to be lowered, there will be a gap between the height-adjusting plate and the scraper mounting bracket. The larger the gap, the lower the position of the height-adjusting plate. When adjusting, the second connecting screw can be inserted first. Then screw the nut into the connecting hole, and then screw the second connecting screw into the threaded hole. At this time, the nut located between the height-adjusting plate and the scraper mounting frame can stabilize the position of the height-adjusting plate, so that it is not Shaking up and down or left and right will occur.

In some embodiments, in order to fasten the position of the height-adjusting plate, a jacking hole is provided on the scraper mounting frame, a thread is arranged in the jacking hole, a jacking screw is screwed into the jacking hole, and the jacking screw is The height-adjusting board plays a stabilizing role on the height-adjusting board and improves the overall stability of use.

Specifically, there are four threaded holes in total, and two are in a group, which are respectively provided on the left and right sides of the height-adjusting plate. The right side is provided with a third threaded hole and a fourth threaded hole. This distribution method can balance the force of the height-adjusting plate and improve the stability of use. The position of the top tightening hole and the second tightening hole, the position of the first tightening hole corresponds to the middle of the first threaded hole and the second threaded hole, and the position of the second tightening hole corresponds to the middle of the third threaded hole and the fourth threaded hole. When the screw is tightened, it can play a better and balanced effect on the height adjustment plate.

In some embodiments, the height-adjusting plate is provided with a groove, and the mounting plate is provided with a protruding strip corresponding to the groove, which facilitates the positioning and installation of the mounting plate, and also facilitates the disassembly of the mounting plate.

In this example, the number of grooves is two, which are located in the middle of the height-adjusting plate, and the number of protruding strips corresponds to the grooves. During installation, the mounting plate can be positioned and installed through the cooperation of the grooves and the protruding strips. , and then fix the mounting plate on the height-adjusting plate through the first connecting screw.

In some embodiments, the lateral movement module includes a fixed base plate, a stepper motor, a coupling, a screw rod and a mounting seat; the fixed base plate is provided with a stepper motor mounting end and a screw rod fixed end, the The stepper motor is installed on the installation end of the stepper motor, and the screw rod is installed on the fixed end of the screw rod; the stepper motor is connected with the coupling, the coupling is connected with the screw rod, and the screw rod is connected with the mounting seat The mounting seat is connected to the scraper mounting module, and the lateral movement of the mounting seat is realized under the joint action of the stepping motor, the coupling and the screw rod.

Please refer to FIGS. 5-7 . FIG. 5 shows a schematic diagram of the overall structure of another scraper device; FIG. 6 shows a schematic structural diagram of a feeding module; FIG. 7 shows a schematic structural diagram of a feeding part.

As shown in FIGS. 5-7 , the scraper device includes a lateral movement module and a scraper installation module arranged on the lateral movement module, and the scraper installation module is provided with a scraper and a feeding module; the scraper is a plate-shaped The upper end of the scraper is installed on the scraper installation module, the lower end of the scraper is provided with a first bevel, the middle of the scraper is recessed inward, and the left and right ends of the scraper are respectively inclined inward to form a second bevel and a third bevel.

Wherein, the feeding module includes a pump body and a feeding part, and the pump body and the feeding part are connected by a pipeline; the feeding part is located at the lower end of the scraper installation module, and the pump body sends the molding material to the feeding part through the pipeline parts, the molding material flows out through the feeding part.

In order to realize composite printing of various molding materials, the feeding part in this example is provided with a plurality of feeding troughs inside, and the upper end of the feeding part is provided with a plurality of connections which are respectively communicated with the plurality of feeding troughs. port; the pipeline is connected with the connection port to realize the provision of multi-component molding materials.

The feeding trough is provided with molding materials. The molding materials in each feeding trough are different to realize the supply of multi-component molding materials. When in use, the notch of the feeding trough is facing down, the connecting port is facing up, and the connecting port is connected to the corresponding The pump body is filled with molding materials. Under the action of the pump body, the molding materials required each time are extruded into the feeding trough, and the molding materials flow out through the notch of the feeding trough.

In this example, the number of the feeding troughs and the number of pump bodies are both four, and one pump body corresponds to one feeding trough to realize the printing function of multi-component molding materials. It should be noted that in this example, the The number of feeding troughs and pump bodies is not limited, and can be designed according to actual needs.

It can be understood that different implementations among the various components in the above-mentioned embodiments can be implemented in combination, and the examples are only for illustrating implementations of specific structures, and are not intended to limit the implementation of the solutions.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various kind of change.

Claims (10)

1. A scraper device for a 3D printer, characterized in that the scraper device (1) comprises a lateral movement module (2) and a scraper installation module (3) arranged on the lateral movement module (2), the A scraper (4) is installed on the scraper installation module (3); The scraper (4) is plate-shaped, the upper end of the scraper (4) is mounted on the scraper installation module (3), the lower end of the scraper (4) is provided with a first bevel (41), and the middle part of the scraper (4) faces inward The left and right ends of the scraper (4) are respectively inclined inward to form a second bevel (42) and a third bevel (43). 2. The scraper device of a 3D printer according to claim 1, wherein the scraper mounting module (3) comprises a scraper mounting bracket (31) and a scraper adjusting assembly (32), the scraper mounting bracket (31) One end of the blade is connected to the lateral movement module (2), and the other end of the scraper mounting frame (31) is connected to the scraper adjustment assembly (32). 3. The scraper device of a 3D printer according to claim 2, wherein the scraper adjusting assembly (32) comprises a height-adjusting plate (321), a mounting plate (322) and a first connecting screw (323); The scraper (4) is mounted on the mounting plate (322), the mounting plate (322) is arranged on the height-adjusting plate (321), and the first connecting screw (323) is connected to the mounting plate (322) and the height-adjusting plate (321). plate(321); The height-adjusting plate (321) is connected with the scraper mounting frame (31). 4 . The scraper device of a 3D printer according to claim 3 , wherein the height-adjusting plate ( 321 ) is provided with threaded holes ( 3211 ), and the scraper mounting frame ( 31 ) is provided with threaded holes (3211) Corresponding connecting holes (311), a second connecting screw is provided between the threaded holes (3211) and the connecting holes (311). 5 . The scraper device of a 3D printer according to claim 4 , wherein the scraper mounting frame ( 31 ) is further provided with a tightening hole ( 312 ), and the tightening hole ( 312 ) is provided with a thread. 6 . . 6. The scraper device of a 3D printer according to claim 3, wherein a groove (3212) is provided on the height-adjusting plate (321), and a groove (3212) is provided on the mounting plate (322). 3212) corresponding to the convex strip (3221). 7. The scraper device of a 3D printer according to claim 1, wherein the lateral movement module (2) comprises a fixed base plate (21), a stepping motor (22), a coupling (23), a wire rod (24) and mount (25); The fixed base plate (21) is provided with a stepping motor mounting end (26) and a screw fixing end (27), the stepping motor (22) is mounted on the stepping motor mounting end (26), and the thread The rod (24) is installed on the fixed end (27) of the screw rod; The stepping motor (22) is connected to a coupling (23), the coupling (23) is connected to a lead screw (24), and the lead screw (24) is connected to a mounting seat (25); The mounting seat (25) is connected to the scraper mounting module (3). 8. The scraper device of the 3D printer according to claim 1, characterized in that, the scraper device (1) further comprises a feeding module (5), and the feeding module (5) comprises a pump body (51) and a feeding part (52), the pump body (51) and the feeding part (52) are connected by a pipeline; The feeding member (52) is located at the lower end of the scraper installation module (3). 9. The scraper device for a 3D printer according to claim 8, wherein a plurality of feeding slots (521) are provided inside the feeding member (52), and the upper end of the feeding member (52) is provided with a plurality of feeding grooves (521). There are a plurality of connection ports (522) respectively communicating with the plurality of feeding troughs (521); The pipe is connected to the connection port (522). 10. The scraper device of a 3D printer according to claim 9, characterized in that, the number of the feeding troughs (521) is the same as the number of the pump bodies (51).

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