CN107856304B

CN107856304B - 3D printing device

Info

Publication number: CN107856304B
Application number: CN201711336375.5A
Authority: CN
Inventors: 林贵棱; 陈立鹏; 辛荣
Original assignee: Guangzhou Guoguang Instrument Co ltd
Current assignee: Guangzhou Guoguang Instrument Co ltd
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2020-09-22
Anticipated expiration: 2037-12-14
Also published as: CN107856304A

Abstract

The invention relates to the technical field of 3D printing, in particular to a 3D printing device. The 3D printing device provided by the invention comprises a rack, a rotating mechanism, a lifting mechanism, a printing mechanism, a plurality of material trays and a projection mechanism. Wherein, slewing mechanism, a plurality of charging trays, projecting mechanism all set up in the frame, and elevating system sets up on slewing mechanism, and printing mechanism slides along elevating system and sets up, and includes a plurality of print platform, and a plurality of charging trays set up in a plurality of print platform's below respectively correspondingly, and every projecting mechanism sets up in the below of corresponding charging tray. When the product thickness corresponding to each step of each product to be printed is the same, the printing efficiency of the 3D printing device can be effectively improved; hold the dyestuff of different colours in a plurality of charging trays, can guarantee the diversification of product color. According to the 3D printing device provided by the invention, the two printing modes can be rapidly switched by replacing the pigment in the material tray, so that the diversification of the functions of the 3D printing device is ensured.

Description

3D printing device

Technical Field

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

Background

The 3D printer is a device which is formed by stacking metal, nonmetal, adhesive, plastic and other materials in a space through a mechanical structure design. The 3D printer can meet most of three-dimensional printing requirements, is very wide in application, and relates to multiple industries such as precision manufacturing industry, die processing, medical treatment, electronics, food and the like. Among them, DLP (Digital Light Processing) is a development technology used in projectors and rear projection televisions, and in recent years, DLP technology is applied to the 3D printing industry, and its principle is basically the same as SLA (Stereo Lithography), but only one surface is laser-formed at a time, so that the forming speed is greatly increased.

As shown in fig. 1, a conventional 3D printer using DLP technology generally includes a holding station 41 'capable of moving up and down along a supporting frame 1', a tray 5 'for placing dye is disposed below the holding station 41', and a projector 6 'is disposed below the tray 5'. Carry out the short-term exposure of different patterns to the centre gripping station 41 'of soaking in the dyestuff through projecting apparatus 6', realize the solidification shaping of dyestuff, through the solidification shaping many times, can accomplish the 3D of product and print. But traditional 3D printer printing efficiency is low, and the product color of printing is single and the function is single.

Disclosure of Invention

The first purpose of the present invention is to provide a 3D printing apparatus, which can perform a printing mode for simultaneously printing a plurality of products, thereby improving the printing efficiency.

The second purpose of the present invention is to provide a 3D printing apparatus, which can also perform a multi-color printing mode for a single product, thereby realizing the diversification of product colors.

A third object of the present invention is to provide a 3D printing apparatus, which can realize fast switching between the two printing modes and diversify the functions of the 3D printing apparatus.

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

a 3D printing device, comprising a frame, further comprising:

the rotating mechanism is arranged on the rack;

the lifting mechanism is arranged on the rotating mechanism;

the printing mechanism is arranged along the lifting mechanism in a sliding mode and comprises a plurality of printing platforms;

the plurality of material trays are arranged on the rack and respectively and correspondingly arranged below the plurality of printing platforms; and

the plurality of projection mechanisms are arranged on the rack, and each projection mechanism is arranged below the corresponding material tray.

Furthermore, the frame and/or the lifting mechanism are/is provided with a first limiting structure, and the first limiting structure is positioned below at least one printing mechanism.

Further, 3D printing device still includes second limit structure, second limit structure sets up in the frame, elevating system is equipped with the stopper to the evagination, the stopper can with second limit structure contacts.

Further, the lifting mechanism includes:

the printing mechanism comprises a screw rod and a nut, wherein the screw rod and the nut are sleeved on the screw rod, and the printing mechanism is fixed on the periphery of the nut;

one end of the lead screw is rotatably arranged on and penetrates through the first mounting plate;

the second mounting plate is opposite to the first mounting plate, and the other end of the lead screw is rotatably arranged on and penetrates through the second mounting plate; and

and the output end of the rotary driving component is connected with one end of the screw rod.

Furthermore, a first fixing seat is arranged in the first mounting plate, a second fixing seat is arranged in the second mounting plate, and two ends of the lead screw are respectively arranged in the first fixing seat and the second fixing seat in a penetrating manner.

Further, the lifting mechanism further comprises:

the guide pillar is arranged between the first mounting plate and the second mounting plate, a guide sleeve is arranged on the printing mechanism, and the guide pillar is arranged in the guide sleeve in a penetrating mode.

Furthermore, a connecting shaft is convexly arranged at the bottom of the lifting mechanism, and the connecting shaft is fixed with the output end of the rotating mechanism through a coupler.

Further, be provided with the bearing fixing base in the frame, the inside of bearing fixing base is provided with at least two sets of bearings, the fixed bearing baffle that is provided with of terminal surface of bearing fixing base, the connecting axle passes in proper order the bearing fixing base at least two sets of bearings and the bearing baffle.

Furthermore, a mounting hole is formed in the rack, and the material tray is clamped in the mounting hole.

Further, the tray is made of a photo-curable resin.

The invention has the beneficial effects that:

the 3D printing device provided by the invention comprises a rack, a rotating mechanism, a lifting mechanism, a printing mechanism, a plurality of material trays and a projection mechanism. Wherein, slewing mechanism, a plurality of charging trays, projecting mechanism all set up in the frame, and elevating system sets up on slewing mechanism, and printing mechanism slides along elevating system and sets up, and includes a plurality of print platform, and a plurality of charging trays set up in a plurality of print platform's below respectively correspondingly, and every projecting mechanism sets up in the below of corresponding charging tray. In the invention, when the thickness of each product to be printed is the same, the lifting mechanism can drive the printing platforms to slide, so that the simultaneous processing of a plurality of products is realized, the printing device is in a printing mode for simultaneously printing a plurality of products, and the printing efficiency of the 3D printing device can be effectively improved; hold the dyestuff of different colours in a plurality of charging trays, elevating system drives printing mechanism and slides to the mechanism that rotates drives printing mechanism and rotates, can realize that the single product is by the pigment solidification shaping of multiple colour, and printing device is in the mode of printing that the single product polychrome was printed, guarantees the diversification of product color. According to the 3D printing device provided by the invention, the two printing modes can be quickly switched only by replacing the pigment in the material tray, so that the diversification of the functions of the 3D printing device is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printing apparatus provided in the prior art;

FIG. 2 is a schematic structural diagram of a 3D printing apparatus provided by the present invention;

FIG. 3 is a schematic structural diagram of a control system of a 3D printing apparatus provided by the present invention;

FIG. 4 is a schematic structural diagram of a 3D printing apparatus provided by the present invention (with one tray removed);

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a top view of a 3D printing apparatus provided by the present invention;

fig. 7 is a sectional view taken along the direction B-B in fig. 6.

In the figure:

1' -a scaffold; 41' -a clamping station; 5' -a tray; 6' -projector;

1-a frame; 2-a rotation mechanism; 3-a lifting mechanism; 4-a printing mechanism; 5-material disc; 6-a projection mechanism; 7-a controller; 8-a first limit structure; 9-a second limiting structure; 10-a limiting block;

11-bearing fixing seats; 12-a bearing; 13-bearing shield; 14-mounting holes;

31-a lead screw; 32-a nut; 33-a first mounting plate; 34-a second mounting plate; 35-a rotary drive member; 36-a first fixed seat; 37-a second fixed seat; 38-a connecting shaft; 39-guide column;

41-printing platform; 42-guide sleeve.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the present embodiment, as shown in fig. 2, the 3D printing apparatus includes a frame 1, a rotation mechanism 2, a lifting mechanism 3, a printing mechanism 4, a plurality of trays 5, and a projection mechanism 6. Wherein, slewing mechanism 2, a plurality of charging trays 5, projecting mechanism 6 all set up in frame 1, and elevating system 3 sets up on slewing mechanism 2, and print mechanism 4 slides along elevating system 3 and sets up, and includes a plurality of print platform 41, and a plurality of charging trays 5 set up in a plurality of print platform 41's below respectively correspondingly, and every projecting mechanism 6 sets up in the below of corresponding charging tray 5. In this embodiment, when the thickness of each product to be printed is the same, the lifting mechanism 3 may drive the plurality of printing platforms 41 to slide, so as to process a plurality of products simultaneously, so that the printing apparatus is in a printing mode in which a plurality of products are printed simultaneously, and the printing efficiency of the 3D printing apparatus can be effectively improved; hold the dyestuff of different colours in a plurality of charging trays 5, elevating system 3 drives printing mechanism 4 and slides to slewing mechanism 2 drives printing mechanism 4 and rotates, can realize that the single product is by the pigment solidification shaping of multiple colour, and printing device is in the mode of printing that the single product polychrome was printed, guarantees the diversification of product colour. The 3D printing device that this embodiment provided only through the pigment in the change charging tray 5, just can realize the quick switch-over of above-mentioned two kinds of printing modes, guarantees the diversification of 3D printing device function.

As shown in fig. 2, for convenience of explanation, it is now specified that the leftmost printing deck 41 is the first printing deck, and the other three printing decks 41 in the counterclockwise direction are the second printing deck, the third printing deck, and the fourth printing deck in this order. Similarly, the leftmost tray 5 is defined as the first tray, and the other three trays 5 in the counterclockwise direction are the second tray, the third tray, and the fourth tray in turn. The plurality of trays 5 are respectively and correspondingly arranged below the plurality of printing platforms 41, and the following conditions are included:

the first condition is as follows: the first printing platform is arranged opposite to the first material tray, the second printing platform is arranged opposite to the second material tray, the third printing platform is arranged opposite to the third material tray, and the fourth printing platform is arranged opposite to the fourth material tray;

case two: the first printing platform is arranged opposite to the second material tray, the second printing platform is arranged opposite to the third material tray, the third printing platform is arranged opposite to the fourth material tray, and the fourth printing platform is arranged opposite to the first material tray;

case three: the first printing platform is arranged opposite to the third material tray, the second printing platform is arranged opposite to the fourth material tray, the third printing platform is arranged opposite to the first material tray, and the fourth printing platform is arranged opposite to the second material tray;

case four: the first printing platform and the fourth material tray are arranged oppositely, the second printing platform and the first material tray are arranged oppositely, the third printing platform and the second material tray are arranged oppositely, and the fourth printing platform and the third material tray are arranged oppositely.

For the printing mode in which a plurality of products are printed simultaneously, the products printed simultaneously may be the same, different, or not identical. But the thickness of the product corresponding to each step of printing of each product is required to be ensured to be the same, and the processing synchronism of each product can be realized. The plane patterns projected by the projection mechanism 6 can be the same, different or not completely the same, and the functions of the 3D printing device can be diversified.

As shown in fig. 3, the 3D printing apparatus provided in this embodiment further includes a controller 7, and the controller 7 is electrically connected to the rotating mechanism 2, the lifting mechanism 3, the printing mechanism 4, and the projecting mechanism 6, respectively. Aiming at the printing mode of multi-color printing of single products, particularly, the 3D printing device comprises four material trays 5, wherein the four material trays 5 are respectively filled with red, yellow, blue and green dyes, if the printing mechanism 4 can slide 10mm in the vertical direction, the working parameters of the lifting mechanism 3 and the rotating mechanism 2 can be arranged in the controller 7, so that the lifting mechanism 3 is matched with the rotating mechanism 2 to realize that when the printing mechanism 4 is 1 mm-2 mm, a printing platform 41 is positioned above the tray 5 for placing the red dye, and when the printing mechanism 4 is between 2mm and 4mm, the printing platform 41 is positioned above the material tray 5 for placing yellow dye, when the printing mechanism 4 is between 4mm and 6mm, the printing platform 41 is positioned above the tray 5 for placing blue dye, and when the printing mechanism 4 is between 6mm and 10mm, the printing platform 41 is positioned above the tray 5 for placing green dye. The printed product comprises four colors of red, yellow, blue and green, and the color diversification of the product is greatly improved.

As shown in fig. 4 and 5, in the present embodiment, a first limit structure 8 is disposed on the base of the lifting mechanism 3, the first limit structure 8 is located below a printing mechanism 4, and the first limit structure 8 is electrically connected to the controller 7. When printing mechanism 4 moved first limit structure 8 department, printing mechanism 4 touched first limit structure 8, and first limit structure 8 sends contact signal to

controller

7, and 3 stop motion of controller 7 control elevating system can effectively avoid elevating system 3 to move excessively and cause elevating system 3's damage. Further, the controller 7 records this position as an initial printing position in the vertical direction of the printing mechanism 4, and the initialization of the position of the entire lifting mechanism 3 in the vertical direction is realized by the contact of the printing mechanism 4 with the first stopper structure 8. Of course, the number of the first limiting structures 8 may not be limited to one, and may be two, three or more, and the detection accuracy can be effectively improved by setting more first limiting structures 8. In addition, the first limit structure 8 may be disposed on the frame 1, in addition to the base of the lifting mechanism 3, and the above-mentioned effects can also be achieved. In addition, the rack 1 is provided with a mounting hole 14, the tray 5 is clamped in the mounting hole 14, the pattern emitted by the projection mechanism 6 can be smoothly projected onto the tray 5, and particularly, the tray 5 can be made of transparent light-cured resin. In addition, still be provided with the second limit structure 9 of being connected with controller 7 electricity on the frame 1, elevating system 3 is equipped with stopper 10 to the evagination, because slewing mechanism 2 drives elevating system 3 and rotates, when stopper 10 and second limit structure 9 contact, second limit structure 9 sends the contact signal to controller 7, controller 7 control slewing mechanism 2 stall, controller 7 marks this position as the initial print position of circumference, through the touching of second limit structure 9 and stopper 10, realize the initialization of elevating system 3 circumferential position. In particular, the first and second limit structures 8, 9 may be contact limit switches.

As shown in fig. 6 and 7, the lifting mechanism 3 provided in this embodiment includes a screw nut structure, a first mounting plate 33, a second mounting plate 34, and a rotation driving component 35, where the screw nut structure includes a screw 31 and a nut 32 sleeved on the screw 31, the printing mechanism 4 is fixed on the periphery of the nut 32, one end of the screw 31 is rotatably disposed on and penetrates the first mounting plate 33, the other end of the screw 31 is rotatably disposed on and penetrates the second mounting plate 34, and an output end of the rotation driving component 35 is connected to one end of the screw 31. When the rotation driving part 35 rotates, the screw rod 31 can be driven to rotate, the nut 32 sleeved on the screw rod 31 can slide along the screw rod 31, and then the printing mechanism 4 is driven to slide in the vertical direction, and the curing molding of the dye of the printing platform 41 at different positions in the vertical direction is realized by matching with different exposure time and different patterns of the projection mechanism 6. In addition, be provided with first fixing base 36 in first mounting panel 33, be provided with second fixing base 37 in the second mounting panel 34, the both ends of lead screw 31 are worn to locate respectively in first fixing base 36 and second fixing base 37, and first fixing base 36 and second fixing base 37 can play the supporting role to lead screw 31 to can effectively prevent the wearing and tearing of lead screw 31 to first mounting panel 33 and second mounting panel 34.

In addition, as shown in fig. 7, the lifting mechanism 3 further includes a guide post 39 disposed between the first mounting plate 33 and the second mounting plate 34, a guide sleeve 42 is disposed on the printing mechanism 4, the guide post 39 is inserted into the guide sleeve 42, and the guide post 39 and the guide sleeve 42 are engaged with each other, so that the printing mechanism 4 can be guided in the vertical direction and the printing mechanism 4 can be prevented from rotating in the process of sliding in the vertical direction, and particularly, the number of the guide post 39 and the guide sleeve 42 is preferably two or more.

In addition, a connecting shaft 38 is convexly arranged at the bottom of the lifting mechanism 3, and the connecting shaft 38 is fixed with the output end of the rotating mechanism 2 through a coupler. The frame 1 is provided with a bearing fixing seat 11, at least two groups of bearings 12 are arranged inside the bearing fixing seat 11, a bearing baffle 13 is fixedly arranged on the end face of the bearing fixing seat 11, and the connecting shaft 38 sequentially penetrates through the bearing fixing seat 11, the at least two groups of bearings 12 and the bearing baffle 13. Through setting up at least two sets of bearings 12, can realize the better rotation of connecting axle 38, through setting up bearing fixing base 11 and bearing baffle 13, can effectively avoid the inner circle of bearing 12 because the atress is too big and the axial displacement that leads to. Of course, the number of bearings 12 is not limited to two, and may be three, four or more.

It is noted that the foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a 3D printing device, includes frame (1), its characterized in that still includes:

the rotating mechanism (2) is arranged on the rack (1);

the lifting mechanism (3) is arranged on the rotating mechanism (2), the lifting mechanism (3) comprises a screw-nut structure, a first mounting plate (33), a second mounting plate (34), a rotary driving component (35) and a guide post (39), the screw rod nut structure comprises a screw rod (31) and a nut (32) sleeved on the screw rod (31), one end of the screw rod (31) is rotatably arranged on and penetrates through the first mounting plate (33), the second mounting plate (34) is arranged opposite to the first mounting plate (33), and the other end of the screw rod (31) is rotatably arranged on and passes through the second mounting plate (34), the output end of the rotary driving component (35) is connected with one end of the screw rod (31), the guide post (39) is arranged between the first mounting plate (33) and the second mounting plate (34);

the printing mechanism (4) is arranged along the lifting mechanism (3) in a sliding mode and comprises a plurality of printing platforms (41), the printing mechanism (4) is fixed on the periphery of the nut (32), a guide sleeve (42) is arranged on the printing mechanism (4), and the guide post (39) penetrates through the guide sleeve (42);

the plurality of material trays (5) are arranged on the rack (1), and the plurality of material trays (5) are respectively and correspondingly arranged below the plurality of printing platforms (41); and

the plurality of projection mechanisms (6) are arranged on the rack (1), and each projection mechanism (6) is arranged below the corresponding material tray (5);

the second limiting structure (9), the second limiting structure (9) is arranged on the rack (1), the lifting mechanism (3) is provided with a limiting block (10) in an outward protruding mode, and the limiting block (10) can be in contact with the second limiting structure (9);

the controller (7), the controller (7) respectively with slewing mechanism (2), elevating system (3), printing mechanism (4) and projection mechanism (6) electricity is connected, second limit structure (9) with the controller electricity is connected.

2. 3D printing device according to claim 1, wherein a first stop structure (8) is arranged on the frame (1) and/or the lifting mechanism (3), the first stop structure (8) being located below at least one of the printing mechanisms (4).

3. The 3D printing device according to claim 1, wherein a first fixing seat (36) is disposed in the first mounting plate (33), a second fixing seat (37) is disposed in the second mounting plate (34), and two ends of the lead screw (31) are respectively inserted into the first fixing seat (36) and the second fixing seat (37).

4. The 3D printing device according to any one of claims 1 to 2, wherein a connecting shaft (38) is convexly arranged at the bottom of the lifting mechanism (3), and the connecting shaft (38) is fixed with the output end of the rotating mechanism (2) through a coupler.

5. The 3D printing device according to claim 4, wherein a bearing fixing seat (11) is arranged on the rack (1), at least two groups of bearings (12) are arranged inside the bearing fixing seat (11), a bearing baffle (13) is fixedly arranged on the end face of the bearing fixing seat (11), and the connecting shaft (38) sequentially penetrates through the bearing fixing seat (11), the at least two groups of bearings (12) and the bearing baffle (13).

6. The 3D printing device according to any one of claims 1 to 2, wherein a mounting hole (14) is formed in the frame (1), and the tray (5) is clamped in the mounting hole (14).

7. The 3D printing device according to claim 6, characterized in that the tray (5) is made of light-curable resin.