CN110654022A

CN110654022A - Scraper structure of DLP ceramic printer

Info

Publication number: CN110654022A
Application number: CN201911076420.7A
Authority: CN
Inventors: 张云玲; 龚晓群; 张建祥
Original assignee: Nanjing Institute of Industry Technology
Current assignee: Nanjing Institute of Industry Technology
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-01-07

Abstract

The invention discloses a scraper structure of a DLP (digital light processing) ceramic printer, which comprises a working surface, wherein a rotatable resin groove is arranged on the working surface, the bottom of the rotatable resin groove is connected with a driving motor, a projecting arm is arranged at the rear side of the rotatable resin groove through a lifting device, a forming base plate is arranged at the bottom of the projecting arm, a scraper adjusting seat is arranged at the front side of the rotatable resin groove, a scraper adjusting rod is arranged on the scraper adjusting seat, a scraper extends downwards from the scraper adjusting rod, the scraper is arranged on the scraper adjusting seat, the scraper adjusting seat comprises an L-shaped plate, an annular through groove is arranged at the bottom of the L-shaped plate, a connecting piece is connected in the annular through groove, a first fixing hole is arranged on the working surface, a rotating shaft extends downwards from the center of the annular through groove, and a rotating hole is arranged on the working surface. Meanwhile, the scraper can rotate in the horizontal plane, so that the leveling effect of the scraper is improved.

Description

Scraper structure of DLP ceramic printer

Technical Field

The invention relates to the technical field of 3D printing, in particular to a scraper structure of a DLP (digital light processing) ceramic printer.

Background

Digital Light Processing (DLP) is one of 3D printing technologies, and mainly uses a projector to project ultraviolet Light to cure photopolymer liquid layer by layer, thereby creating a 3D printing object.

The DLP device comprises a liquid tank for containing photosensitive resin which can be cured after being irradiated by ultraviolet light with specific wavelength; the imaging system is arranged below the liquid tank, the imaging surface of the imaging system is just positioned at the bottom of the liquid tank, and thin resin with certain thickness and shape can be cured each time through energy and graphic control (the two-dimensional shape of the cured resin layer is completely the same as the two-dimensional cross section shape obtained by cutting the resin layer). And a lifting mechanism is arranged above the liquid tank, and after each section exposure is finished, the height of the liquid tank is lifted upwards to be the same as the layered thickness, so that the currently solidified solid resin is separated from the bottom surface of the liquid tank and is adhered to a lifting plate or a resin layer formed at the last time, and thus, a three-dimensional entity is generated by exposing and lifting layer by layer.

In the prior art, the invention patent with application publication number "CN 108656308A" discloses a 3D printer applied to high solid phase ceramics, which realizes 3D printing by a scraper moving in a horizontal plane and a molded substrate lifting in a height direction, but has a certain defect that the leveling effect of the scraper moving linearly in the plane is not good.

Therefore, a scraper structure of the DLP ceramic printer is provided.

Disclosure of Invention

The invention provides a scraper structure of a DLP (digital light processing) ceramic printer, aiming at improving the leveling effect of the scraper by rotating in a horizontal plane.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:

a scraper structure of a DLP ceramic printer comprises a working surface, wherein a rotatable resin groove is movably arranged on the working surface, the bottom of the rotatable resin tank is connected with a driving motor for driving the rotatable resin tank to rotate in a transmission way, the rear side of the rotatable resin tank is provided with a projecting arm through a lifting device, and the bottom of the extension arm is provided with a forming substrate, the front side of the rotatable resin tank is provided with a scraper adjusting seat, the scraper adjusting seat is provided with a scraper leveling rod, and the scraper leveling rod extends downwards to form a scraper extending into the rotatable resin groove, the scraper adjusting seat comprises an L-shaped plate, the bottom of the L-shaped plate is provided with an annular through groove, a connecting piece is connected in the annular through groove in a sliding manner, and a first fixing hole for fixing the connecting piece is formed in the working face, a rotating shaft extends downwards from the center of the annular through groove, and a rotating hole matched with the rotating shaft is formed in the working face.

Preferably, in the scraper structure of the DLP ceramic printer, the first fixing holes are distributed in a regular triangle.

Based on above-mentioned technical characteristics, first fixed orifices are regular triangle distribution, avoid the scraper to adjust the seat and take place to rotate, have played better fixed effect.

Preferably, among the scraper structure of above-mentioned DLP ceramic printer, the scraper leveling lever includes base plate, scraper fixed plate and limiting plate, the scraper fixed plate sets up one side of base plate bottom, be provided with the groove of sliding in the scraper fixed plate, the inslot that slides is provided with the sliding block, just the scraper sets up the bottom at the sliding block, the limiting plate sets up the opposite side of base plate bottom.

Based on above-mentioned technical characteristics, the groove that slides makes things convenient for the change of scraper and the adjustment of scraper position, and the limiting plate has played the effect of supporting tight scraper fixed plate simultaneously, and the scraper has played the effect of support at the in-process of atress.

Preferably, among the scraper structure of above-mentioned DLP ceramic printer, be provided with the hole of sliding on the limiting plate, be provided with the slip post in the hole of sliding, slip post one end with the base plate bottom is connected, the slip post other end with limiting plate bottom butt, the cover is equipped with the spring on the slip post.

Based on the technical characteristics, the arrangement of the spring plays a role in reducing weight, the spring limits the limiting plate to move in the height direction, and the levelness of the limiting plate is guaranteed.

Preferably, among the scraper structure of above-mentioned DLP ceramic printer, scraper fixed plate top be provided with base plate side complex fixed slot, the groove that slides sets up in the bottom of scraper fixed plate, the inslot that slides runs through to be provided with the second fixed orifices, still be provided with on the sliding block with second fixed orifices complex stroke hole, the stroke hole extends along the direction of height.

Based on above-mentioned technical characteristics, played the effect of fixed scraper fixed plate through second fixed orifices and stroke hole, made the sliding block adjustable in the direction of height through the stroke hole simultaneously, and then adjusted the levelness of scraper.

Preferably, in the scraper structure of above-mentioned DLP ceramic printer, the fixed slot extends along the horizontal direction and forms the spacing groove, just the base plate extends along the horizontal direction have with spacing groove matched with stopper.

Based on the technical characteristics, the limiting groove is matched with the limiting block, so that the positioning effect on the scraper fixing plate is achieved.

Preferably, in the scraper structure of above-mentioned DLP ceramic printer, the gliding block bottom downwardly extending has the glide groove and has the pterygoid lamina along the horizontal direction extension, just the scraper top is provided with the pterygoid lamina groove with pterygoid lamina matched with.

Based on above-mentioned technical characteristics, the cooperation of pterygoid lamina and wing groove for the scraper is portable on the length direction of sliding block, makes things convenient for the change and the location of scraper.

Preferably, in the scraper structure of the DLP ceramic printer, the end face of the sliding block is provided with a baffle plate, the baffle plate extends to the middle section of the scraper in the height direction, and the scraper extends along two sides in the width direction.

Based on above-mentioned technical characteristics, the setting of baffle has avoided the resin to remove from the baffle position to the center in rotatable resin groove, avoids its normal work that influences DLP ceramic printer.

Preferably, among the scraper structure of above-mentioned DLP ceramic printer, the scraper side is provided with the holding tank, the holding tank is followed scraper length direction extends the setting, the scraper center is provided with deformation and leads to the groove, deformation is led to the groove and is followed scraper length direction runs through the setting.

Based on above-mentioned technical characteristic, the weight of scraper has been reduced in the setting of holding tank, and the logical groove of deformation improves the scraper and is put the scraping volume to the resin in this position.

The invention has the beneficial effects that:

the scraper is reasonable in structural design, after the scraper is fixed, materials in the resin groove are extruded into a gap between the rubber scraper and the resin groove due to the rotation of the resin groove, and through the guiding effect of the scraper, resin around the resin groove is filled into a vacant position after molding, so that the resin content of the next molding is ensured, and meanwhile, through the rotation in a horizontal plane, the leveling effect of the scraper is improved; before printing, after leveling of the resin scraper, the distance between the scraper and the rotatable resin groove bottom plate is ensured to be moderate, the phenomenon that the distance is too small to block or the distance is too large to fill excessively is prevented, and meanwhile, the angle of the scraper can be adjusted by adjusting the distance of the scraper mounting seat, so that the optimal filling effect is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the present invention with the outer shell removed;

FIG. 3 is a schematic view of a doctor blade adjusting seat according to the present invention;

FIG. 4 is a schematic view of the back side of the doctor blade adjusting seat of the present invention;

FIG. 5 is a schematic view of a blade mounting arrangement of the present invention;

FIG. 6 is an enlarged schematic view of structure A of FIG. 5;

fig. 7 is a schematic view of a baffle installation structure of the invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a working surface; 2. a rotatable resin tank; 3. a drive motor; 4. a lifting device; 5. a reach arm; 6. molding a substrate; 7. a scraper adjusting seat;

71. a scraper leveling rod; 72. a scraper; 73. an L-shaped plate; 74. an annular through groove; 75. a connecting member; 76. a first fixing hole;

81. a substrate; 82. a scraper fixing plate; 83. a limiting plate; 84. a sliding groove; 85. a sliding block; 86. a sliding hole; 87. sliding the column; 88. fixing grooves; 89. a second fixing hole;

90. a travel hole; 91. a limiting groove; 92. a limiting block; 93. a wing plate; 94. a wing groove; 95. accommodating grooves; 96. a deformation through groove; 97. and a baffle plate.

Detailed Description

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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 7, a scraper 72 structure of a DLP ceramic printer comprises a working surface 1, a rotatable resin tank 2 is arranged on the working surface 1, the rotatable resin tank 2 is connected with a driving motor 3 for driving the rotatable resin tank to rotate in a plane, the driving motor 3 is arranged below the working surface 1 as shown in fig. 2, the connecting position of the rotatable resin tank 2 and the working surface 1 is connected through a bearing to realize rotation, an outer gear ring is sleeved outside the rotatable resin tank 2, and a gear meshed with the outer gear ring is arranged on the motor.

As shown in fig. 1 and 2, a lifting device 4 is vertically arranged on the working surface 1, the lifting device 4 is a ball screw, the ball screw is driven by a motor, a projecting arm 5 is arranged on a ball screw table, a forming substrate 6 is arranged at the bottom of the projecting arm 5, the forming substrate 6 is positioned in the projection range of the rotatable resin tank 2, and the forming substrate 6 can fall into the rotatable resin tank 2 under the driving of the lifting device 4; meanwhile, the bottom of the working surface 1 is provided with an optical machine and a reflector, and resin is solidified on the molding substrate 6.

As shown in fig. 3, a scraper adjusting seat 7 is arranged on the working surface 1, a scraper leveling rod 71 is arranged on the scraper adjusting seat 7, a scraper 72 extending into the rotatable resin groove 2 extends downwards on the scraper leveling rod 71, the scraper adjusting seat 7 comprises an L-shaped plate 73, an annular through groove 74 is arranged at the bottom of the L-shaped plate 73, a connecting piece 75 is connected in the annular through groove 74 in a sliding manner, the connecting piece 75 is a bolt, a first fixing hole 76 for fixing the connecting piece 75 is arranged on the working surface 1, the first fixing hole 76 is distributed in a regular triangle shape, that is, the first fixing holes 76 are three, the first fixing holes 76 are distributed in a regular triangle shape, rotation of the scraper adjusting seat 7 is avoided, a better fixing effect is achieved, a rotating shaft extends downwards at the center of the annular through groove 74, a rotating hole matched with the rotating shaft is arranged on the working surface 1, and rotation of the scraper adjusting seat 7 is achieved.

As shown in fig. 4 and 5, the scraper leveling rod 71 includes a base plate 81, a scraper fixing plate 82 and a limiting plate 83, the scraper fixing plate 82 is disposed on one side of the bottom of the base plate 81, the limiting plate 83 is disposed on the other side of the bottom of the base plate 81, a sliding groove 84 is disposed in the scraper fixing plate 82, a sliding block 85 is disposed in the sliding groove 84, and the scraper 72 is disposed at the bottom of the sliding block 85; a sliding hole 86 is formed in the limiting plate 83, a sliding column 87 is arranged in the sliding hole 86, one end of the sliding column 87 is connected with the bottom of the base plate 81, the other end of the sliding column 87 is abutted against the bottom of the limiting plate 83, and a spring is sleeved on the sliding column 87; fixed slot 88 extends along the horizontal direction and is formed with spacing groove 91, base plate 81 extends along the horizontal direction have with spacing groove 91 complex stopper 92, the groove 84 that slides makes things convenient for the change of scraper 72 and the adjustment of scraper 72 position, limiting plate 83 has played the effect of supporting tight scraper fixed plate 82 simultaneously, scraper 72 has played the effect of support at the in-process of atress, the setting of spring, the effect of subtracting heavy has been played, spring restriction limiting plate 83 is the ascending removal in the direction of height simultaneously, the levelness of limiting plate 83 has been guaranteed simultaneously, spacing groove 91 and stopper 92's cooperation, the positioning action to scraper fixed plate 82 has been played.

As shown in fig. 6 and 7, the bottom of the sliding block 85 extends downwards to form a sliding groove 84 and extends horizontally to form a wing plate 93, and the top of the scraper 72 is provided with a wing groove 94 matched with the wing plate 93; the side surface of the scraper 72 is provided with an accommodating groove 95, the accommodating groove 95 extends along the length direction of the scraper 72, the center of the scraper 72 is provided with a deformation through groove 96, the longitudinal section of the deformation through groove 96 is triangular, the scraper 72 is made of rubber materials, and the deformation through groove 96 penetrates along the length direction of the scraper 72; the terminal surface of sliding block 85 is provided with baffle 97, baffle 97 extends to the middle section of scraper 72 in the direction of height, scraper 72 extends along both sides on the width direction, pterygoid lamina 93 and wing groove 94's cooperation, make scraper 72 portable on sliding block 85's length direction, make things convenient for the change and the location of scraper 72, baffle 97's setting, avoided the resin to remove to rotatable resin groove 2's center from baffle 97 position, avoid its normal work that influences DLP ceramic printer, the setting of holding tank 95, the weight of scraper 72 has been reduced, the logical groove 96 of deformation improves the scraper and scrapes the volume at this position to the resin.

As shown in fig. 7, a fixing groove 88 matched with the side surface of the substrate 81 is disposed at the top of the scraper fixing plate 82, the sliding groove 84 is disposed at the bottom of the scraper fixing plate 82, a second fixing hole 89 is disposed in the sliding groove 84 in a penetrating manner, a stroke hole 90 matched with the second fixing hole 89 is further disposed on the sliding block 85, the stroke hole 90 extends in the height direction, the second fixing hole 89 and the stroke hole 90 play a role in fixing the scraper fixing plate 82, and the sliding block 85 is adjustable in the height direction through the stroke hole 90, so that the levelness of the scraper 72 is adjusted.

The working principle is as follows: the projecting arm 5 and the molding base plate 6 are used for carrying a molded mold, and after the photo-machine exposes a predetermined layer of image, the resin is cured on the molding base plate 6, and the molding motor pulls up the mold formed by exposure above the liquid level. After the primary exposure is finished, the driving motor 3 runs for 10s, the driving wheel drives the driven wheel to rotate once, the driven wheel is in nested fit with the resin tank, and the driven wheel drives the resin tank to rotate; after scraper 72 is fixed, the material in the resin tank is because the rotation in resin tank, extrude the clearance the inside between rubber scraper 72 and the resin tank, through the guide effect of rubber scraper 72, resin tank all around is filled to the vacancy position after the shaping, guarantee next fashioned resin content, before printing, the leveling of resin scraper 72 need carry out, guarantee that the distance of rubber scraper 72 and resin tank bottom plate is moderate, prevent to die apart from the undersize card or apart from too big filling excessively, the angle of scraper 72 is adjusted through the distance of adjusting scraper 72 mount pad simultaneously, reach the best filling effect.

The above embodiments are only used to illustrate the technical solutions of the present invention, the protection scope of the present invention is not limited to the description scope of the above embodiments, and any modifications and changes made by those skilled in the art without inventive changes fall within the protection scope of the present invention.

Claims

1. The utility model provides a DLP ceramic printer's scraper structure which characterized in that: comprises a working face (1), a rotatable resin groove (2) is movably arranged on the working face (1), the bottom of the rotatable resin groove (2) is in transmission connection with a driving motor (3) used for driving the rotatable resin groove to rotate, a projecting arm (5) is installed at the rear side of the rotatable resin groove (2) through a lifting device (4), a forming substrate (6) is installed at the bottom of the projecting arm (5), a scraper adjusting seat (7) is arranged at the front side of the rotatable resin groove (2), a scraper leveling rod (71) is arranged on the scraper adjusting seat (7), a scraper (72) extending into the rotatable resin groove (2) extends downwards from the scraper leveling rod (71), the scraper adjusting seat (7) comprises an L-shaped plate (73), an annular through groove (74) is arranged at the bottom of the L-shaped plate (73), and a connecting piece (75) is connected in the annular through groove (74) in a sliding manner, and a first fixing hole (76) for fixing the connecting piece (75) is formed in the working face (1), a rotating shaft extends downwards from the center of the annular through groove (74), and a rotating hole matched with the rotating shaft is formed in the working face (1).

2. The doctor blade structure of a DLP ceramic printer according to claim 1, wherein: the first fixing holes (76) are distributed in a regular triangle shape.

3. The doctor blade structure of a DLP ceramic printer according to claim 1, wherein: scraper leveling rod (71) includes base plate (81), scraper fixed plate (82) and limiting plate (83), scraper fixed plate (82) set up one side of base plate (81) bottom, be provided with sliding groove (84) in scraper fixed plate (82), be provided with sliding block (85) in sliding groove (84), just scraper (72) set up the bottom at sliding block (85), limiting plate (83) set up the opposite side of base plate (81) bottom.

4. The doctor blade structure of a DLP ceramic printer according to claim 3, wherein: be provided with on limiting plate (83) and slide hole (86), be provided with slip post (87) in slip hole (86), slip post (87) one end with base plate (81) bottom is connected, slip post (87) other end with limiting plate (83) bottom butt, the cover is equipped with the spring on slip post (87).

5. The doctor blade structure of a DLP ceramic printer according to claim 3, wherein: scraper fixed plate (82) top be provided with base plate (81) side complex fixed slot (88), the groove of sliding (84) set up the bottom at scraper fixed plate (82), it is provided with second fixed orifices (89) to run through in groove of sliding (84), still be provided with on sliding block (85) with second fixed orifices (89) complex stroke hole (90), stroke hole (90) extend along the direction of height.

6. The doctor blade structure of DLP ceramic printer according to claim 5, wherein: the fixing groove (88) extends along the horizontal direction to form a limiting groove (91), and the substrate (81) extends along the horizontal direction to form a limiting block (92) matched with the limiting groove (91).

7. The doctor blade structure of a DLP ceramic printer according to claim 3, wherein: the bottom of the sliding block (85) extends downwards to form a sliding groove (84) and extends with a wing plate (93) along the horizontal direction, and the top of the scraper (72) is provided with a wing groove (94) matched with the wing plate (93).

8. The doctor blade structure of a DLP ceramic printer according to claim 3, wherein: the end face of the sliding block (85) is provided with a baffle (97), the baffle (97) extends to the middle section of the scraper (72) in the height direction, and the scraper (72) extends along two sides in the width direction.

9. The doctor blade structure of a DLP ceramic printer according to claim 1, wherein: scraper (72) side is provided with holding tank (95), holding tank (95) are followed scraper (72) length direction extends the setting, scraper (72) center is provided with deformation and leads to groove (96), deformation is led to groove (96) and is followed scraper (72) length direction runs through the setting.