1. The utility model provides a stone device of printing apparatus, includes stone mechanism (1), its characterized in that:

the spreading mechanism (1) comprises a first cylinder (11), a feeding roller (12) arranged in the first cylinder (11) and a first driving device (13) for driving the feeding roller (12) to rotate, wherein the top and the bottom of the first cylinder (11) are respectively provided with a first feeding hole (111) and a first discharging hole (112); at least two scraping blades (121) are arranged on the outer side surface of the feeding roller (12) at intervals along the circumferential direction of the feeding roller, at least one scraping blade (121) is close to the first feeding hole (111) and used for guiding a printing material, and at least one other scraping blade (121) is close to the first discharging hole (112) and used for blocking the printing material;

under the drive of the first driving device (13), the feeding roller (12) can be driven to rotate and at least one scraping blade (121) can be driven to stir the printing material to the first discharge hole (112).

2. A spreading device according to claim 1, wherein the feed roll (12) is provided with two doctor blades (121), the two doctor blades (121) being spaced apart from each other by 180 degrees; or the feeding roller (12) is provided with three scraping blades (121), and the three scraping blades (121) are spaced by 120 degrees; or the feeding roller (12) is provided with four scraping blades (121), and the four scraping blades (121) are mutually spaced by 90 degrees.

3. The spreading device according to claim 1, wherein the cross section of the first cylinder (11) comprises a vertical part (113), a first circular arc part (114) which is connected with the bottom of the vertical part (113) and is a quarter circle, and a second circular arc part (115) which is connected with the first circular arc part (114) and is hooked upwards, and the second circular arc part (115) can prevent the printing material from leaking when the printing material is pre-stored in the first cylinder (11).

4. A spreading device according to claim 3, further comprising at least two scraping plates (2) arranged at intervals under the first cylinder (11), wherein the scraping plates (2) are arranged vertically, and the first discharge hole (112) is formed between at least one scraping plate (2) and the second arc portion (115).

5. A spreading device according to any one of claims 1-4, further comprising a blanking mechanism (3) arranged above the spreading mechanism (1), wherein:

the blanking mechanism (3) comprises a second barrel (31), a blanking roller (32) arranged in the second barrel (31) and a second driving device (33) for driving the blanking roller (32) to rotate, a second feeding hole (311) and a second discharging hole (312) are formed in the top and the bottom of the second barrel (31) respectively, and the second discharging hole (312) is communicated with the first feeding hole (111).

6. The spreading device according to claim 5, wherein the outer side of the blanking roller (32) is provided with a plurality of material guiding slots (321) at intervals along the circumferential direction, and the blanking roller (32) can be driven to rotate by the second driving device (33) until the material guiding slots (321) are communicated with the second discharge port (312), so that the printing material can be conveyed to the second discharge port (312) through the material guiding slots (321).

7. The paving device according to claim 6, wherein the material guide chute (321) is extended along the axial direction of the blanking roller (32).

8. A spreading device according to claim 5, wherein the first feed inlet (111) and the first discharge outlet (112) are both arranged to extend along the axial direction of the first cylinder (11); and the second feeding hole (311) and the second discharging hole (312) are arranged in an extending mode along the axial direction of the second cylinder (31).

9. A spreading device according to claim 5, wherein the first driving device (13) is a first stepping motor, the output shaft of which is connected with a feed roller (12); the second driving device (33) is a second stepping motor, and an output shaft of the second stepping motor is connected with the discharging roller (32).

10. A spreading device according to claim 5, further comprising a detection device (4) arranged at one side of the first cylinder (11), the detection device (4) comprising an electric eye detection module (41) and a proximity switch (42).

Background

3D printing, a type of rapid prototyping technology, also known as additive manufacturing, is a technology that constructs an object by printing layer by layer using an adhesive material, such as powdered metal or plastic, based on a digital model file.

In the existing 3D printing apparatus, the material spreading device is one of the core components, and largely determines the molding quality. The existing spreading device is complex in most structures, high in manufacturing cost, difficult to process powder with poor flowability, low in control precision and easy to cause accumulation of redundant materials, so that the cost of printing consumables is increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a spreading device of a printing device.

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

the utility model provides a stone device of printing apparatus, includes the stone mechanism, wherein:

the material spreading mechanism comprises a first barrel, a feeding roller arranged in the first barrel and a first driving device for driving the feeding roller to rotate, and a first feeding hole and a first discharging hole are respectively formed in the top and the bottom of the first barrel; at least two scraping blades are arranged on the outer side surface of the feeding roller at intervals along the circumferential direction of the feeding roller, at least one scraping blade is close to the first feeding hole and used for guiding printing materials, and at least another scraping blade is close to the first discharging hole and used for blocking the printing materials;

under the drive of the first driving device, the feeding roller can be driven to rotate and at least one scraping blade is driven to stir the printing material to a first discharge hole.

The spreading device is simple in structure, after a certain amount of printing materials are fed into the spreading mechanism, the printing materials are blocked by at least one scraping blade, and under the driving of the first driving device, at least one other scraping blade can be driven to rotate and push the certain amount of printing materials to the first discharge hole, so that the certain amount of printing materials can be supplied.

Furthermore, two scraping blades are arranged on the feeding roller, and the two scraping blades are spaced by 180 degrees; or the feeding roller is provided with three scraping blades which are spaced by 120 degrees; or four scraping blades are arranged on the feeding roller, and the four scraping blades are arranged at intervals of 90 degrees.

Further, the cross section of first barrel includes vertical portion, with vertical portion bottom is connected and is the first circular arc portion of quarter circle and the second circular arc portion that is connected and upwards colludes with first circular arc portion, second circular arc portion can prevent when the printing material from spilling in first barrel prestore.

From this, when the printing material fell in the first barrel from first feed inlet, this printing material will be followed the vertical portion whereabouts of first barrel, and the cooperation sets up the doctor-bar in first discharge gate department and keeps off the material for most printing material piles up in first barrel and is located the doctor-bar inboard, and only a small amount of printing material flows out the doctor-bar and falls in second circular arc portion department. And then under the action of the first driving device, at least one scraping blade can be driven to pull the accumulated printing materials to the first discharge hole.

Further, the device also comprises at least two scraping plates arranged below the first cylinder at intervals, the scraping plates are vertically arranged, and the first discharge hole is formed between at least one scraping plate and the second arc part.

Therefore, when the spreading mechanism moves forwards, at least one scraping plate can spread the printing material; when the spreading mechanism moves reversely, at least one other scraping plate can spread the printing material, so that the printing material can be spread in two directions.

Further, still including setting up the unloading mechanism of shop's material mechanism top, wherein:

the blanking mechanism comprises a second barrel, a blanking roller arranged in the second barrel and a second driving device for driving the blanking roller to rotate, a second feeding hole and a second discharging hole are formed in the top and the bottom of the second barrel respectively, and the second discharging hole is communicated with the first feeding hole.

Furthermore, a plurality of material guide grooves are formed in the outer side surface of the discharging roller at intervals along the circumferential direction of the outer side surface, and the discharging roller can be driven to rotate under the driving of the second driving device until the material guide grooves are communicated with the second discharge hole, so that the printing materials can be conveyed to the second discharge hole through the material guide grooves.

Further, the material guide groove extends along the axial direction of the discharging roller.

Further, the first feeding hole and the first discharging hole are arranged in an extending mode along the axial direction of the first cylinder body; the second feed inlet and the second discharge outlet are arranged along the axis direction of the second cylinder in an extending mode.

Further, the first driving device is a first stepping motor, and an output shaft of the first stepping motor is connected with the feeding roller; the second driving device is a second stepping motor, and an output shaft of the second stepping motor is connected with the discharging roller.

Further, still including setting up in first barrel one side detection device, detection device includes electric eye detection module and proximity switch.

Therefore, the electric eye detection module is used for determining the zero position of the feeding roller. When the doctor blade is adjusted to a proper angle, the proximity switch is adjusted to irradiate the electric eye detection module. When the equipment is electrified and started every time, a zero position needs to be found, namely, the first driving device drives the feeding roller to rotate until the proximity switch detects the electric eye detection module, and the operation is stopped.

In summary, the spreading device of the printing apparatus of the present invention has a simple structure, and when a certain amount of printing material is fed into the spreading mechanism, the printing material is blocked by at least one scraping blade, and under the driving of the first driving device, at least another scraping blade is driven to rotate and move the certain amount of printing material to the first discharge port, so as to achieve the quantitative supply of the printing material.

Drawings

FIG. 1 is a schematic structural diagram of a spreading device of the present invention;

FIG. 2 is a schematic structural diagram of the spreading mechanism in FIG. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

FIG. 4 is a schematic view of a portion of the structure of FIG. 3;

FIG. 5 is a schematic structural view of the blanking mechanism in FIG. 1;

FIG. 6 is a schematic cross-sectional view of FIG. 5;

FIG. 7 is a schematic structural view of a feed roll of the present invention with three doctor blades disposed thereon;

fig. 8 is a schematic structural view of the feed roller provided with four doctor blades according to the invention.

Wherein the reference numerals have the following meanings:

1. a material spreading mechanism; 11. a first cylinder; 111. a first feed port; 112. a first discharge port; 113. a vertical portion; 114. a first arc portion; 115. a second arc portion; 12. a feed roller; 121. scraping a blade; 13. a first driving device; 2. a scraping plate; 3. a blanking mechanism; 31. a second cylinder; 311. a second feed port; 312. a second discharge port; 32. a blanking roller; 321. a material guide chute; 33. a second driving device; 4. a detection device; 41. an electric eye detection module; 42. a proximity switch.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. 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 and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, 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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 8, the present invention provides a spreading device of a printing apparatus, including a support, a feeding mechanism 3 disposed on the support and located above the support, and a spreading mechanism 1 disposed on the support and located below the support.

Specifically, this support includes the backup pad that two symmetries set up, and this unloading mechanism 3 and stone mechanism 1 all set up between two backup pads. The spreading mechanism 1 comprises a first cylinder 11, a feed roller 12 arranged in the first cylinder 11 and a first driving device 13 for driving the feed roller 12 to rotate. The top and the bottom of the first cylinder 11 are respectively provided with a first feeding hole 111 and a first discharging hole 112; at least two scraping blades 121 are arranged on the outer side surface of the feeding roller 12 at intervals along the circumferential direction of the feeding roller, at least one scraping blade 121 is close to the first feeding hole 111 and used for guiding printing materials, and at least another scraping blade 121 is close to the first discharging hole 112 and used for blocking the printing materials.

In this embodiment, the first driving device 13 is a first stepping motor, and an output shaft of the first stepping motor is connected to the feeding roller 12 and drives the feeding roller 12 to rotate; the first feeding hole 111 and the first discharging hole 112 are both arranged to extend along the axial direction of the first cylinder 11; the outer side surface of the feed roller 12 is provided with two scraping blades 121 at regular intervals along the circumferential direction, and the two scraping blades 121 are spaced by 180 degrees.

Of course, in other embodiments, referring to fig. 6-7, three blades 121 may be disposed on the feed roll 12, and the three blades 121 are spaced 120 degrees apart from each other; the feed roller 12 may also be provided with four wiper blades 121, and the four wiper blades 121 may be spaced apart from each other by 90 degrees.

Of course, in other embodiments, the blades 121 on the feed roll 12 may be unevenly disposed.

Therefore, under the driving of the first driving device 13, the feeding roller 12 can be driven to rotate and the scraping blade 121 close to the first feeding hole 111 can rotate to strip the printing material to the first discharging hole 112, so that the quantitative supply of the printing material is realized; then the first driving device 13 drives the feeding roller 12 to rotate for a certain angle, so that the scraping blade 121 which stirs the printing material to the first discharge hole 112 rotates for a certain angle and is used for blocking the printing material which is fed in a next fixed amount; while the blade 121 adjacent to the first feed opening 111 will rotate to the first feed opening 111 for guiding the next fed printing material.

According to the spreading device, after a certain amount of printing materials are fed into the spreading mechanism 1, the printing materials are blocked by at least one scraping blade 121, and under the driving of the first driving device 13, at least one other scraping blade 121 can be driven to rotate and push the printing materials to the first discharge hole 112, so that the fixed amount of the printing materials is supplied.

Referring to fig. 3-4, the cross section of the first cylinder 11 includes a vertical portion 113, a first arc portion 114 connected to the bottom of the vertical portion 113 and being a quarter circle, and a second arc portion 115 connected to the first arc portion 114 and hooked upward, and the vertical portion 113, the first arc portion 114, and the second arc portion 115 form an approximately "L" -shaped structure. The second arc portion 115 prevents the printing material from leaking when the printing material is pre-stored in the first cylinder 11.

Therefore, when the printing material falls into the first cylinder 11 from the first feeding hole 111, the printing material falls along the vertical part of the first cylinder 11, and is stopped by the scraping blade 121 arranged at the first discharging hole 112, so that most of the printing material is accumulated in the first cylinder 11 and is positioned inside the scraping blade 121, and only a small amount of the printing material flows out of the scraping blade 121 and falls at the second arc part 115. Then, under the action of the first driving device 13, the at least one scraping blade 121 is driven to push the accumulated printing material toward the first discharging opening 112.

In addition, two scraping plates 2 which are arranged at intervals are further arranged below the first cylinder 11, and the two scraping plates 2 are symmetrical and vertically arranged. A first discharge port 112 is formed between the scraper 2 adjacent to the second arc portion 115 and the second arc portion 115.

Thus, when the spreading mechanism 1 moves forward, one of the scraper plates 2 can spread the printing material; when the spreading mechanism 1 moves reversely, the other scraping plate 2 can spread the printing material, so that the bidirectional spreading of the printing material is realized.

In addition, the other side of the first cylinder 11 is further provided with a detection device 4, and the detection device 4 comprises an electric eye detection module 41 and a proximity switch 42. The electric eye detection module 41 is used to determine the zero position of the feed roll 12. When the wiper blade 121 is adjusted to a proper angle, the proximity switch 42 is adjusted to irradiate the electric eye detecting module 41. The zero position is sought when the equipment is powered on and started every time, namely, the first driving device 13 drives the feeding roller 12 to rotate until the proximity switch 42 detects the electric eye detection module 41, and the zero position is stopped.

In this embodiment, the proximity switch 42 is an electro-optic proximity switch.

Referring to fig. 5-6, the blanking mechanism 3 includes a second cylinder 31, a blanking roller 32 disposed in the second cylinder 31, and a second driving device 33 for driving the blanking roller 32 to rotate, the top and the bottom of the second cylinder 31 are respectively provided with a second feeding hole 311 and a second discharging hole 312, and the second discharging hole 312 is communicated with the first feeding hole 111; a plurality of material guide grooves 321 for storing materials are arranged on the outer side surface of the blanking roller 32 at intervals along the circumferential direction.

In this embodiment, the second driving device 33 is a second stepping motor, and an output shaft of the second stepping motor is connected to the discharging roller 32 and drives the discharging roller 32 to rotate; the second feeding hole 311 and the second discharging hole 312 are both extended along the axial direction of the second cylinder 31, and the material guiding groove 321 is extended along the axial direction of the discharging roller 32.

Therefore, the feeding roller 32 can be driven by the second driving device 33 to rotate until the material guiding groove 321 is communicated with the second material outlet 312, and the printing material can be conveyed to the second material outlet 312 through the material guiding groove 321. Since the amount of the printing material in each of the material guiding chutes 321 is substantially the same, when the material spreading mechanism 1 needs to be quantitatively supplied, the second driving device 33 can control the rotation angle of the discharging roller 32, so that the material guiding chutes 321 are sequentially communicated with the second discharging hole 312 to realize the quantitative supply.

In this embodiment, the guide chutes 321 are eight and are uniformly spaced. Of course, in other embodiments, more or less than eight material guiding chutes 321 can be provided according to practical situations, and the depth of the material guiding chute 321 can also be provided according to practical situations, which is not limited herein.

In summary, the spreading device of the present invention has a simple structure, when a certain amount of printing material is fed into the spreading mechanism 1, the printing material is blocked by at least one of the scraping blades 121, and under the driving of the first driving device 13, at least another scraping blade 121 is driven to rotate and move the certain amount of printing material to the first discharging opening 112, so as to realize the quantitative supply of printing material.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.