CN110560633B

CN110560633B - Print platform of sand casting 3D printer

Info

Publication number: CN110560633B
Application number: CN201910790908.XA
Authority: CN
Inventors: 祝勇仁; 赵庆洋; 范有; 赖全忠; 邓劲莲; 吴俊�; 毛德锋
Original assignee: Hangzhou Ximalaya Digital Technology Co ltd
Current assignee: Hangzhou Ximalaya Digital Technology Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2021-01-12
Anticipated expiration: 2039-08-26
Also published as: CN110560633A

Abstract

A printing platform of a sand casting 3D printer comprises a lifting device and a forming box, wherein the lifting device comprises a base plate, a supporting plate is arranged at the upper end of the base plate, a top plate is arranged at the upper end of the supporting plate, sliding rods are arranged on the left side and the right side of the upper surface of the base plate, a fixing plate is arranged at the lower end of the top plate, a mounting hole is formed in the fixing plate, a screw rod nut is arranged at the central position of the inner side of the fixing plate, a screw rod is arranged on the inner side of the screw rod nut, a motor mounting plate is arranged on the outer side of the lower end of the screw rod, a motor is arranged at the lower end of the screw rod, a channel hole positioned on the outer side of the screw rod is formed in the inner side of the forming box after the screw rod passes through the bottom of, the supporting part upper end is equipped with the supporting shoe, and supporting shoe upper surface fixedly connected with supporting platform, supporting platform sliding connection are inboard at the shaping case.

Description

Print platform of sand casting 3D printer

Technical Field

The invention relates to the technical field of sand casting 3D printers, in particular to a printing platform of a sand casting 3D printer.

Background

At present, the 3D printing technology is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and printing layer by layer based on a digital model file, and is often used for manufacturing models in the fields of mold manufacturing, industrial design, and the like. The traditional sand casting 3D printer generally adopts a selective laser sintering process, firstly, powder materials are flatly paved on a supporting platform in a forming box through a powder paving roller, a high-strength carbon dioxide laser is used for scanning the cross section of a part on the flatly paved powder, the powder materials are sintered together under the irradiation of high-strength laser to obtain the cross section of the part, after one layer of the cross section is printed, a working platform descends by a certain height, the powder is paved again to print the cross section of the next layer of the workpiece, the reciprocating operation is carried out, and the newly sintered part and the formed part are bonded with each other; the powder in non-sintering district still is the loose state, the final three-dimensional entity that forms of circulation so, blow loose powder around the work piece away through the powder blower at last and take out the printing of work piece again after the work piece, the size precision of work piece has partly to depend on the precision that work platform reciprocated, and need take out the work piece on work platform after the work piece processing among the prior art is accomplished, can't carry out the printing of next work piece at once, the work efficiency of 3D printer has been reduced, and the shaping case can't be opened completely also can't be with the separation of 3D printer, the clearance of work piece with take trouble, blow up easily powder material among other work parts that get into the 3D printer, thereby influence the work progress of 3D printer, also increased work burden for the staff simultaneously.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a printing platform of a sand casting 3D printer, the device is reasonable in structural design, the lifting device is high in moving precision, the size precision of a workpiece is high, a forming box can be separated from the lifting device, the working efficiency of the 3D printer is improved, powder materials lifted when the workpiece is blown to take a piece are prevented from entering the 3D printer or the lifting device, and the working precision of the lifting device and the 3D printer is prevented from being influenced.

The invention adopts the technical scheme for solving the technical problems that: the printing platform of the sand casting 3D printer comprises a lifting device and a forming box, wherein the lifting device comprises a base plate, a supporting plate is fixedly connected to the periphery of the upper surface of the base plate, a top plate is fixedly connected to the upper end of the supporting plate, one end of a sliding rod is fixedly connected to the left side and the right side of the upper surface of the base plate, the upper end of the sliding rod is fixedly connected to the lower surface of the top plate, a fixing plate fixedly connected to the inner side of the supporting plate is arranged at the lower end of the top plate, a mounting hole located on the outer side of the sliding rod is formed in the fixing plate, a lead screw nut is fixedly connected to the central position of the inner side of the fixing plate, a lead screw connected with threads is arranged on the inner side of the lead screw nut, a motor mounting plate is, the motor is fixedly connected to the lower surface of the motor mounting plate, a channel hole positioned outside the screw rod is formed in the center of the inner side of the top plate, the forming box is positioned at the upper end of the lifting device, the screw rod penetrates through the bottom of the forming box and is positioned inside the forming box, an ejector rod is arranged at the upper end of the screw rod, a supporting part is arranged at the upper end of the screw rod, a mounting groove formed in the ejector rod is formed in the outer side of the supporting part, a plane bearing is fixedly connected to the bottom of the mounting groove, the lower surface of the plane bearing is in contact connection with the upper end of the ejector rod, a bearing is arranged on the outer side of the middle end of the supporting part, a bearing mounting groove formed in the mounting groove is formed in the outer side of the upper end of the bearing, a bearing end cover in threaded connection, be equipped with the supporting platform who supports through lead screw and ejector pin for supporting platform's removal precision is higher, is equipped with the shaping case with the elevating gear separation, makes the work piece can carry out the printing of next work piece through the shaping case of renewal after the shaping, has accelerated the work efficiency of 3D printer.

For further perfection, elevating gear is located the below ground, roof and ground parallel and level, roof upper surface left and right sides fixedly connected with guide rail controls the guide rail upper end is equipped with the slider, slider fixed connection is in become the bottom of the case portion, roof upper end central point puts and is located the guide block of via hole upper end, the guide block inboard open have with the guiding hole of via hole connection, the big end down setting of guiding hole for elevating gear is located the below ground, makes things convenient for the removal and the change of shaping case, is equipped with the slider at the shaping case lower extreme, makes the shaping case light more convenient when elevating gear upper end removes, has also made things convenient for the position to the shaping case to fix a position.

The forming box comprises a bottom plate, a sliding block is located on the left side and the right side of the lower end of the bottom plate, a conical hole is formed in the center of the inner side of the bottom plate, a lead screw penetrates through the conical hole and a guide hole and is located on the inner side of the forming box, a box body is arranged at the upper end of the bottom plate, a supporting platform is connected to the inner side of the box body in a sliding mode, the box body comprises four box walls which are spliced end to end, the lower end of each box wall is rotatably connected with the bottom plate through a rotating shaft, a first fixing rod is fixedly connected to the outer surface of the upper end of each left box wall and a second fixing rod are fixedly connected to the outer surface of the upper end of each box wall, the second fixing rod is in joggle joint with the first fixing rod on the left side and the right side of the box body, the forming box is formed by four box, And the conical holes are arranged quickly, so that powder materials are prevented from being accumulated at the upper end of the bottom plate.

Further perfection, the upper surface of the top plate is fixedly connected with a limiting plate positioned at the front side of the forming box, a limiting device is arranged at the lower side of the rear end of the forming box, the limiting device comprises a positioning plate positioned at the rear end of the forming box, the lower end of the positioning plate is fixedly connected with a movable plate, the left side and the right side of the front end of the movable plate are provided with moving parts positioned at the lower end of the forming box, the moving parts are positioned between the left guide rail and the right guide rail, the left moving part and the right moving part are respectively positioned at the left side and the right side of the guide block, the lower end of the moving part is provided with a rolling groove, the rolling grooves are internally provided with rolling wheels which are rotatably connected in the rolling grooves through rotating shafts, the left side and the right side of the rear end of the positioning plate are provided with fastening rods, the clamping of anchorage bar lower extreme outside joint has the division locating hole on the roof is equipped with limiting plate and stop device, then does further location to the shaping case for the location of shaping case is more accurate, and the size precision of shaping work piece is higher.

The invention has the beneficial effects that: the powder material lifting device is reasonable in structural design, the supporting platform is supported by the lead screw and the ejector rod, so that the moving precision of the supporting platform is higher, the forming box separated from the lifting device is arranged, the next workpiece can be printed by replacing the new forming box after the workpiece is formed, the working efficiency of the 3D printer is improved, the powder material lifted when the workpiece blows powder to take a part is prevented from entering the 3D printer or the lifting device, and the working precision of the lifting device and the 3D printer is prevented from being influenced.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a schematic view of the connection of the lead screw and the ejector pin;

FIG. 5 is a front view of the spacing device;

FIG. 6 is a top view of the spacing device;

fig. 7 is a top view of the forming box.

Description of reference numerals: 1. lifting device, 2, forming box, 3, base plate, 4, supporting plate, 5, top plate, 6, sliding rod, 7, fixing plate, 8, mounting hole, 9, screw nut, 10, screw rod, 11, motor mounting plate, 12, motor, 13, ejector rod, 14, supporting part, 15, mounting groove, 16, plane bearing, 17, bearing, 18, bearing mounting groove, 19, bearing end cover, 20, supporting block, 21, supporting platform, 22, ground, 23, guide rail, 24, slide block, 25, guide block, 26, guide hole, 27, bottom plate, 28, taper hole, 29, box body, 30, box wall, 31, first fixing rod, 32, second fixing rod, 33, limiting plate, 34, limiting device, 35, positioning plate, 36, rolling groove, 39, rolling wheel, 40, fastening rod, 41, rotating disk, 42, wedge block, 43, fixing plate, 8, mounting hole, 9, mounting plate, mounting platform, support platform, 22, ground, 23, guide rail, 24, slide block, 25, guide block, 26, Channel hole, 44, locating hole, 45, wedge hole.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

referring to figures 1-7: the printing platform of the sand casting 3D printer comprises a lifting device 1 and a forming box 2, wherein the lifting device 1 comprises a base plate 3, a supporting plate 4 is fixedly connected to the periphery of the upper surface of the base plate 3, a top plate 5 is fixedly connected to the upper end of the supporting plate 4, one end of a sliding rod 6 is fixedly connected to the left side and the right side of the upper surface of the base plate 3, the upper end of the sliding rod 6 is fixedly connected to the lower surface of the top plate 5, a fixing plate 7 fixedly connected to the inner side of the supporting plate 4 is arranged at the lower end of the top plate 5, a mounting hole 8 positioned on the outer side of the sliding rod 6 is formed in the fixing plate 7, a lead screw nut 9 is fixedly connected to the central position of the inner side of the fixing plate 7, a lead screw 10 in threaded connection is arranged on the inner side of the lead screw nut 9, the lower end of the screw rod 10 penetrates through the motor mounting plate 11 to be connected with a motor 12 in a transmission manner, the motor 12 is fixedly connected to the lower surface of the motor mounting plate 11, a passage hole 43 positioned on the outer side of the screw rod 10 is formed in the center position of the inner side of the top plate 5, the forming box 2 is positioned at the upper end of the lifting device 1, the screw rod 10 penetrates through the bottom of the forming box 2 to be positioned on the inner side of the forming box 2, a push rod 13 is arranged at the upper end of the screw rod 10, a supporting part 14 is arranged at the upper end of the screw rod 10, a mounting groove 15 formed in the push rod 13 is formed in the outer side of the supporting part 14, a plane bearing 16 is fixedly connected to the bottom of the mounting groove 15, the lower surface of the plane bearing 16 is in contact connection with the upper end of the push rod 13, a bearing 17 is arranged on the outer side, the upper end of the supporting part 14 is in contact connection with a supporting block 20, the upper surface of the supporting block 20 is fixedly connected with a supporting platform 21, the supporting platform 21 is slidably connected to the inner side of the forming box 2, the lifting device 1 is located below the ground 22, the top plate 5 is flush with the ground 22, the left side and the right side of the upper surface of the top plate 5 are fixedly connected with guide rails 23, the upper ends of the left guide rail 23 and the right guide rail 23 are provided with sliders 24, the sliders 24 are fixedly connected to the bottom of the forming box 2, the central position of the upper end of the top plate 5 is provided with a guide block 25 located at the upper end of the channel hole 43, the inner side of the guide block 25 is provided with a guide hole 26 connected with the channel hole 43, the guide hole 26 is arranged in a small upper part and a large lower part, the forming box 2 comprises a bottom plate 27, the sliders 24 are located at the left side and the right side, the upper end of the bottom plate 27 is provided with a box body 29, the supporting platform 21 is slidably connected to the inner side of the box body 29, the box body 29 comprises four box walls 30 which are spliced end to end, the lower end of each box wall 30 is rotatably connected with the bottom plate 27 through a rotating shaft, the outer surface of the upper end of each left box wall 30 and the outer surface of the upper end of each right box wall 30 are fixedly connected with a first fixing rod 31, the outer surface of the upper end of each front box wall 30 and the outer surface of the upper end of each right box wall 30 are provided with second fixing rods 32 which are in joggle joint with the first fixing rods 31, the upper surface of the top plate 5 is fixedly connected with a limiting plate 33 which is positioned at the front side of the forming box 2, the lower side of the rear end of the forming box 2 is provided with a limiting device 34, the limiting device 34 comprises a positioning plate 35 which is positioned at the rear, control removal portion 37 is located respectively the guide block 25 left and right sides, removal portion 37 lower extreme open has rolling groove 38, be equipped with the rolling wheel 39 of connecting in rolling groove 38 through the rotation axis in the rolling groove 38, the locating plate 35 rear end left and right sides is equipped with anchorage bar 40, anchorage bar 40 upper end fixedly connected with rotary disk 41, little wedge 42 about the fixedly connected with of anchorage bar 40 middle-end outside, wedge 42 outside threaded connection has the division and is in wedge 45 on the

movable plate

36, 40 lower extreme outside joints of anchorage bar have the division locating hole 44 on roof 5.

When the invention is used, the forming box 2 is conveyed to the upper end of the lifting device 1 only by the conveying forklift, the sliding block 24 is clamped outside the guide rail 23, the front end of the forming box 2 is abutted against the limit plate 33, the limit device 34 is pushed into the rear end of the forming box 2, the locating plate 33 is abutted against the rear end of the forming box 2, finally the wedge-shaped block 42 outside the middle end of the fastening rod 40 is in threaded connection in the wedge-shaped hole 45 by rotating the rotating disc 41, and the lower end of the fastening rod 40 is clamped into the inner side of the locating hole 44, thereby completing the installation and location of the forming box 2, when in use, the screw rod 10 and the ejector rod 13 are controlled to move upwards by the motor 12 in the lifting device 1, the screw rod 10 and the ejector rod 13 are abutted against the supporting platform 21 to move upwards, the powder material is uniformly laid on the supporting platform 21 of the lifting device 1 by the powder laying roller, the powder material on the supporting, then the supporting platform 21 moves downwards for a certain distance by controlling the motor 12 to rotate, the next layer of section of the workpiece is printed, the circulation is performed, after the workpiece is printed, the screw rod 10 is controlled by the motor 12 to move downwards, the supporting platform 21 is clamped at the upper end of the bottom plate 27, the supporting platform 21 and the supporting block 20 are left at the inner side of the forming box 2, the supporting platform 21 and the ejector rod 13 are separated, the screw rod 10 and the ejector rod 13 retract into the inner side of the guide block 25, the wedge-shaped block 42 at the outer side of the middle end of the fastening rod 40 is separated from the wedge-shaped hole 45 by rotating the rotating disc 41, the limiting device 34 can be taken out from the forming box 2 by moving the lower end of the fastening rod 40 out of the positioning hole 44, the forming box 2 is taken out by the transportation forklift and placed into the empty forming box 2, the 3D printer can continue printing, the taken out forming box 2 only, and blowing the loose powder materials through a powder blowing machine, taking the workpiece out, collecting the loose powder, splicing the forming box 2 again, and putting the forming box into use again.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides a print platform of sand casting 3D printer, includes elevating gear (1) and shaping case (2), characterized by: the lifting device (1) comprises a base plate (3), a supporting plate (4) is fixedly connected to the periphery of the upper surface of the base plate (3), a top plate (5) is fixedly connected to the upper end of the supporting plate (4), one end of a sliding rod (6) is fixedly connected to the left side and the right side of the upper surface of the base plate (3), the upper end of the sliding rod (6) is fixedly connected to the lower surface of the top plate (5), a fixing plate (7) fixedly connected to the inner side of the supporting plate (4) is arranged at the lower end of the top plate (5), a mounting hole (8) positioned on the outer side of the sliding rod (6) is formed in the fixing plate (7), a lead screw nut (9) is fixedly connected to the inner side center of the fixing plate (7), a lead screw (10) in threaded connection is arranged on the inner side of the lead screw nut (9), a motor mounting plate (11) is arranged on the outer, the lower end of the screw rod (10) penetrates through the motor mounting plate (11) and is connected with a motor (12) in a transmission mode, the motor (12) is fixedly connected to the lower surface of the motor mounting plate (11), a channel hole (43) located on the outer side of the screw rod (10) is formed in the center position of the inner side of the top plate (5), the forming box (2) is located at the upper end of the lifting device (1), the screw rod (10) penetrates through the bottom of the forming box (2) and is located on the inner side of the forming box (2), an ejector rod (13) is arranged at the upper end of the screw rod (10), a supporting part (14) is arranged at the upper end of the screw rod (10), a mounting groove (15) formed in the ejector rod (13) is formed in the outer side of the supporting part (14), a plane bearing (16) is fixedly connected to the bottom of the mounting groove (15), the lower surface of the, the bearing forming box is characterized in that a bearing mounting groove (18) formed in the mounting groove (15) is formed in the outer side of the bearing (17), a bearing end cover (19) in the bearing mounting groove (18) is in threaded connection with the lower end of the bearing (17), a supporting block (20) is in contact connection with the upper end of the supporting portion (14), a supporting platform (21) is fixedly connected to the upper surface of the supporting block (20), and the supporting platform (21) is in sliding connection with the inner side of the forming box (2).

2. The printing platform of the sand casting 3D printer according to claim 1, wherein: elevating gear (1) is located below ground (22), roof (5) and ground (22) parallel and level, roof (5) upper surface left and right sides fixedly connected with guide rail (23) control guide rail (23) upper end is equipped with slider (24), slider (24) fixed connection be in become case (2) bottom, roof (5) upper end central point puts and is equipped with and is located guide block (25) of passway hole (43) upper end, guide block (25) inboard open have with guiding hole (26) that passway hole (43) are connected, guiding hole (26) big end down set up.

3. The printing platform of the sand casting 3D printer according to claim 2, wherein: the forming box (2) comprises a bottom plate (27), the sliding blocks (24) are positioned at the left side and the right side of the lower end of the bottom plate (27), a conical hole (28) is formed in the center of the inner side of the bottom plate (27), the screw rod (10) penetrates through the conical hole (28) and the guide hole (26) and is positioned on the inner side of the forming box (2), a box body (29) is arranged at the upper end of the bottom plate (27), the supporting platform (21) is connected to the inner side of the box body (29) in a sliding way, the box body (29) comprises four box walls (30) which are spliced end to end, the lower end of each box wall (30) is rotatably connected with the bottom plate (27) through a rotating shaft, a first fixing rod (31) is fixedly connected to the outer surface of the upper end of each box wall (30) in a left-right mode, and a second fixing rod (32) which is in joggle joint with the first fixing rod (31) is arranged on the outer surface of the upper end of each box wall (30) in a front-back mode.

4. The printing platform of the sand casting 3D printer according to claim 2, wherein: fixedly connected with is located limiting plate (33) of shaping case (2) front side on roof (5), shaping case (2) rear end downside is equipped with stop device (34), stop device (34) are including being located locating plate (35) of shaping case (2) rear end, locating plate (35) lower extreme fixedly connected with movable plate (36), the movable plate (36) front end left and right sides is equipped with and is located the removal portion (37) of shaping case (2) lower extreme, removal portion (37) are located about between guide rail (23), about the removal portion (37) are located respectively the guide block (25) left and right sides, and removal portion (37) lower extreme is opened there is rolling groove (38), be equipped with in rolling groove (38) and rotate rolling wheel (39) of connection in rolling groove (38) through the rotation axis, locating plate (35) rear end left and right sides is equipped with fastening rod (40), fastening rod (40) upper end fixedly connected with rotary disk (41), little wedge (42) about fastening rod (40) middle-end outside fixedly connected with, wedge (42) outside threaded connection has the opening wedge (45) on movable plate (36), fastening rod (40) lower extreme outside joint has the opening locating hole (44) on roof (5).