TWI508771B - A stirring mechanism and a 3-d printer - Google Patents

Description

Mixing mechanism and three-dimensional printer

The invention relates to a stirring mechanism and a three-dimensional printer, in particular to a stirring mechanism and a three-dimensional printer suitable for three-dimensional light solid forming.

Rapid Prototyping (RP) enables rapid 3D CAD manufacturing, test assembly of parts, and further functional testing. 3D printing is one of the rapid prototyping technologies. 3D printing is based on digital model files, using powdered metal or plastic bonding materials to build entities by layer-by-layer stacking.

Stereolithography (SLA) is a way of 3D printing. A three-dimensional optical solid forming machine for manufacturing a three-dimensional object is disclosed in US Pat. No. 6,130,337,100 A1. It is also known that a household 3D printer using SLA is provided with a photosensitive resin placed on a container, and the photosensitive resin receives the corresponding wavelength of light to form a solidified molding. However, to form a layered stack of colored entities, it is necessary to mix photosensitive Resin and dye are formed, because the dye distribution in the photosensitive resin of the container is not uniform, resulting in uneven color of the layered solid body.

Accordingly, it is an object of the present invention to provide a stirring mechanism and a three-dimensional printer that ensure uniform distribution of dye in a photosensitive resin.

Therefore, the stirring mechanism of the embodiment of the present invention comprises: a receiving container defining a receiving space, the receiving container having a horizontally extending substrate, and an upper opening opposite to the substrate and communicating with the receiving space The substrate has a first side and a second side respectively located on opposite sides of a first direction; a transfer unit movable from the first side to the second side relative to the substrate And a blade disposed transversely to the first direction and adjacent to the substrate, and connected to the transfer unit, and driven by the transfer unit to move along the first direction.

Therefore, the three-dimensional printer of the embodiment of the present invention comprises: an outer casing having an inner space; a stirring mechanism disposed in the inner space and including a receiving container, a transfer unit, and a blade. The containment vessel defines a containment space having a horizontally extending substrate and an upper opening opposite the substrate and communicating with the containment space, the substrate having opposite sides in a first direction a first side and a second side of the side. The transfer unit is movable from the first side to the second side in the first direction relative to the substrate. The fan blade is disposed in the first direction and adjacent to the substrate, and is connected to the transfer unit, and is driven by the transfer unit to move along the first direction; a laser mechanism is disposed on the Interior space and located in the event a laser beam is emitted below the container for emitting a laser beam; a scanning mechanism is disposed in the inner space and located below the container, and the laser beam is reflected to the container; and a molding platform is disposed on the The inner space is located above the substrate and can extend through the upper opening to move up and down relative to the container.

Wherein, the transfer unit has two first pulleys respectively adjacent to the first side and the second side, and a set of first transmission belts wound between the two first pulleys and spaced apart from the substrate. a rotary motor that rotates the first pulley, and a first connection group that connects the first transmission belt and the blade.

Wherein the blade has an axis extending transversely to the first direction, and a plurality of circumferentially spaced blades extending outwardly from the axis; the first connection group has a connection to the first a connecting member of the drive belt, and a roller contacting the substrate and connecting the connecting member to the shaft and coaxial with the shaft.

Wherein, the transfer unit further has two second pulleys respectively adjacent to the first side and the second side and spaced apart from the first pulleys, and a set is wound between the two second pulleys and is adjacent to the substrate a second transmission belt spaced apart, a second connection group connecting the second transmission belt and the blade, and a connecting rod connecting one of the first pulleys and the corresponding second pulley, the structure of the second connection group The structure of the first connection group is the same.

The transfer unit has a sliding track spaced apart from the substrate and adjacent to the first side and the second side, and is slidably coupled to the sliding track and opposite to the sliding direction in the first direction. Sliding of a moving track And a first connection group connecting the sliding member and the blade.

The first connection group has a connecting member connected to the sliding member, and the connecting member has a receiving groove. The first connecting group further has an elastic member received in the receiving groove, and a part of the connecting member is accommodated in the receiving portion. a coupling member that is grooved and abutted by the elastic member, and a roller that contacts the substrate and the coupling member and the blade.

The transfer unit has a tooth row spaced apart from the substrate and having two ends adjacent to the first side and the second side, respectively, meshing with the tooth row and linearly moving relative to the tooth row in a first direction And a gear set connecting the blade, a rotating motor driving the gear set, a conveying track extending in the first direction, and a sliding contact with the conveying track and sliding relative to the conveying track in the first direction A conveying member that connects the rotary motor.

Wherein, the transfer unit further has a first fixing bracket fixed to the tooth row, the rotating motor and the conveying track and disposed on the substrate, the gear set has a plurality of gears, and the rotating motor has a setting on the conveying member a motor body, and a mandrel connecting the motor body, the first fixing bracket has a sliding slot extending in the first direction for the mandrel to extend, and the end portion of the spindle of the rotating motor is directly driven One of the gears, the gear adjacent to the substrate, connects the blade.

The effect of the invention is that the blade is moved by the transfer unit from the first side to the second side relative to the substrate, and the blade of the blade is rotated to make the photosensitive resin and the dye more uniform. The ground is mixed to produce a photosensitive resin having a uniform color, which in turn makes the color of the colored layered stack uniform.

1‧‧‧ entity

2‧‧‧ Shell

21‧‧‧ housing

211‧‧‧ access port

22‧‧‧Upper cover

23‧‧‧Internal space

3‧‧‧ mixing mechanism

31‧‧‧Container container

311‧‧‧Substrate

312‧‧‧ first side panel

313‧‧‧Second side panel

314‧‧‧Connecting plate

315‧‧‧Opening

316‧‧‧Survey space

317‧‧‧ first side

318‧‧‧ second side

32‧‧‧Transfer unit

320‧‧‧ Gear Set

3201‧‧‧ Gears

321A‧‧‧First Pulley

321B‧‧‧Second pulley

322A‧‧‧First transmission leather band

322B‧‧‧Second drive belt

323‧‧‧Rotary motor

3231‧‧‧Motor body

3232‧‧‧ mandrel

323A‧‧‧Transportation track

323B‧‧‧Transport

324A‧‧‧First Connection Group

324B‧‧‧Second connection group

3241‧‧‧Connecting parts

3242‧‧‧Roller

3243‧‧‧ accommodating slots

3244‧‧‧Flexible parts

3245‧‧‧Couplings

325A‧‧‧First fixed bracket

325B‧‧‧Second fixed bracket

3251‧‧‧Chute

326‧‧‧ Connecting rod

327‧‧‧Slide track

328‧‧‧Slipper

329‧‧‧ teeth row

33‧‧‧ fan leaves

331‧‧‧ Axis

332‧‧‧ leaves

4‧‧‧Rack

5‧‧‧ Laser agency

6‧‧‧Scanning agency

7‧‧‧Molding mechanism

71‧‧‧Forming arm

72‧‧‧Molding platform

8‧‧‧Colored photosensitive resin

D1‧‧‧ first direction

Other features and advantages of the embodiments of the present invention will be apparent from the detailed description of the embodiments of the present invention, wherein: FIG. 1 is a schematic diagram showing a first embodiment of the three-dimensional printer of the present invention. And an upper cover is in a closed position relative to a casing; FIG. 2 is a plan view showing the upper cover in an open position relative to the casing; FIG. 3 is a plan view schematically showing a stirring mechanism of the embodiment; 4 and FIG. 5 are schematic plan views illustrating the operation of the stirring mechanism; FIG. 6 is a schematic plan view showing the first direction of the direction of travel of the stirring mechanism from front to back; FIG. 7 is a plan view. A second embodiment of the three-dimensional printer of the present invention is illustrated with only one stirring mechanism; FIG. 8 is a schematic plan view showing the operation mode of the stirring mechanism; and FIG. 9 is a schematic plan view showing one of the three-dimensional printers of the present invention. In the third embodiment, only a stirring mechanism is illustrated; FIG. 10 is a plan view showing a fourth embodiment of the three-dimensional printer of the present invention, only a stirring mechanism is illustrated; and FIG. 11 is a view of the stirring. A schematic plan view of the way the organization operates.

The following description of the embodiments is intended to be illustrative of the specific embodiments Directional terms mentioned in the present invention, such as "upper", "lower", "before", "after", "left", "right", etc. Just refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, a first embodiment of the three-dimensional printer of the present invention is suitable for manufacturing a layered stacked body 1 and comprises: a casing 2, a stirring mechanism 3, a frame 4, and a laser. The mechanism 5, a scanning mechanism 6, and a molding mechanism 7.

The outer casing 2 has an inner space 23. In detail, the outer casing 2 further has a casing 21, an upper cover 22 coupled to the casing 21, and an access opening 211. The access port 211 is defined by the housing 21. The upper cover 22 is pivotable relative to the housing 21, and the access opening 211 is slidably engageable with respect to the housing 21. The internal space 23 is defined by the housing 21 and the upper cover 22.

Referring to FIGS. 3 to 5, the stirring mechanism 3 includes a receiving container 31, a transfer unit 32, and a blade 33.

The container 31 has a square frame and has a horizontally extending substrate 311, a first side plate 312 and a second side plate 313 extending from the substrate 311 in a first direction D1. Two connecting plates 314 respectively connecting the first side plate 312 and the second side plate 313, and an upper opening 315 opposite to the substrate 311. The substrate 311, the first side plate 312, the second side plate 313, and the connecting plates 314 together define a receiving space 316 that communicates with the upper opening 315. The substrate 311 has a first side 317 adjacent to an inner surface of the first side plate 312 and a second side plate adjacent to the second side plate The second side 318 of the inner surface of the 313. In the present embodiment, the first direction D1 is a direction from left to right.

The transfer unit 32 has two first pulleys 321A adjacent to the first side 317 and the second side 318, and a first transmission belt wound between the two first pulleys 321A and spaced apart from the substrate 311. 322A, a rotating motor 323 driving one of the first pulleys 321A, a first connecting group 324A connecting the first driving belt 322A and the blade 33, and a first pulley 321A and the rotating motor 323 The first fixing bracket 325A is disposed on the substrate 311 and adjacent to one of the connecting plates 314. The first connecting group 324A has a connecting member 3241 connected to the first driving belt 322A, and a roller 3242 contacting the substrate 311 and connecting the connecting member 3241.

The blade 33 is disposed transverse to the first direction D1 and located on the substrate 311. In detail, the blade 33 has an axis 331 extending transversely to the first direction D1, and four blades that are substantially elongated and circumferentially spaced apart and extend outward from the axis 331 332. One end of the shaft 331 is connected to the roller 3242 and coaxial with the rollers 3242. Among them, the number of the blades 332 is adjusted according to the actual number.

Referring to Figures 1, 2 and 4, the frame 4 is disposed in the interior space 23 and supports the containment vessel 31. The laser mechanism 5 is disposed in the inner space 23 and obliquely below the container 31 for emitting a laser beam. The scanning mechanism 6 is disposed in the inner space 23 and directly under the receiving container 31, and reflects the laser beam to the Containing container 31. The molding mechanism 7 is disposed in the inner space 23 and includes a molding arm 71 fixed to the frame 4, and is movable up and down relative to the molding arm 71 and above the substrate 311, and can extend through the upper opening 315. Forming platform 72.

The operation of the three-dimensional printer will be described below.

Referring to Figures 1 and 3, a liquid photosensitive resin and a dye are preliminarily placed in the containing space 316, and the upper cover 22 is in a closed position relative to the housing 21, at which time the forming platform 72 is located at the upper end of the forming arm 71. . Referring to FIG. 4 and FIG. 5, the rotation motor 323 of the stirring mechanism 3 starts to drive to rotate the corresponding first pulley 321A, so that the first transmission belt 322A drives the roller 3242 of the first connection group 324A to travel in the direction. The first side 317 of the substrate 311 is moved to the second side 318 along the first direction D1, and the blade 332 of the blade 33 is rotated to uniformly mix the photosensitive resin with the dye to produce a photosensitive resin 8 having a uniform color.

Referring to FIG. 1 and FIG. 4, the photosensitive resin 8 is determined to be uniform in color. At this time, the roller 3242 of the first connection group 324A and the blade 33 are adjacent to the second side 318. Then, the molding platform 72 first descends through the upper opening 315 and protrudes into the receiving container 31. The laser mechanism 5 emits a laser beam and reflects the laser beam through the scanning mechanism 6. The container 31 is provided such that the partially colored photosensitive resin 8 receives the corresponding wavelength of light to cure the solid 1 of one of the layers. Then, the molding platform 72 is further raised, so that the laser mechanism 5 adjusts the path of the laser beam, and the scanning beam 6 reflects the laser beam to the receiving container 31, so that the partially colored photosensitive resin 8 receives the corresponding light. One of the wavelengths is cured and completed. Layer entity 1. The above-described manner is repeated in such a manner as to reach the desired layered stacked body 1, which is raised adjacent to the access opening 211 (see Fig. 2). Finally, the upper cover 22 is displaced relative to the housing 21 from the closed position shown in FIG. 1 to an open position as shown in FIG. 2, so that the user can take out the color layered stacked entity 1 from the access opening 211. .

Referring to FIG. 4 and FIG. 5, the transfer unit 32 and the fan blade 33 of the stirring mechanism 3 are activated before the molding platform 72 leaves the container 31 to avoid interference by the molding platform 72 and pass through the transfer unit. 32 drives the blade 33 relative to the substrate 311 to move from the first side 317 along the first direction D1 to the second side 318, causing the blade 332 of the blade 33 to rotate to more uniformly mix the photosensitive resin and the dye. The photosensitive resin 8 having a uniform color is produced, and the color of the color layered stacked body 1 is uniform.

It should be noted that since the process of the color layered stacked body 1 of each layer is formed at the substrate 311 adjacent to the container 31, the position of the blade 33 needs to be adjacent to the substrate 311. position. Moreover, if the dye is more difficult to distribute evenly, the roller 3242 of the first connecting belt 324A that drives the first connecting belt 322A can also move relative to the substrate 311 in the opposite direction to the first direction D1, so that the blade The rotation of the blade 332 of 33 causes the photosensitive resin to be more uniformly mixed with the dye. Of course, the roller 3242 of the first connecting group 324A can also be reciprocated multiple times with respect to the substrate 311 by the first driving belt 322A.

On the other hand, when the roller 3242 of the first connection group 324A travels in the first direction D1 when contacting the substrate 311, the plane unevenness of the substrate 311 may occur, and the first transmission skin may be The flexibility of the belt 322A enables the roller 3242 to smoothly pass through the plane unevenness of the substrate 311.

Referring to Fig. 6, the first direction D1 of the traveling direction of the stirring mechanism 3 may be a front-to-back direction. The difference between the stirring mechanism 3 of FIG. 6 and the stirring mechanism 3 of FIG. 5 is that the first side plate 312 and the second side plate 313 are disposed to be spaced apart from each other.

Referring to Figures 7 and 8, there is illustrated a second embodiment of the three-dimensional printer of the present invention, which is substantially identical to the first embodiment except for the transfer unit 32 of the agitation mechanism 3.

The second embodiment is to arrange the detail elements of the transfer unit 32 at the connecting plates 314 adjacent to the container 31. Therefore, the transfer unit 32 further has two second pulleys 321B adjacent to the first side 317 and the second side 318 and spaced apart from the first pulleys 321A, and a set of windings between the two second pulleys 321B. And a second transmission belt 322B spaced apart from the substrate 311, a second connection group 324B connecting the second transmission belt 322B and the blade 33, and a second pulley 321B fixed to the substrate 311 and adjacent to the substrate 311 The second fixing bracket 325B of the other connecting plate 314 and a connecting rod 326 connecting one of the first pulleys 321A and the corresponding second pulley 321B. The structure of the second connection group 324B is the same as that of the first connection group 324A.

In this embodiment, the first pulley 321A directly driven by the rotary motor 323 is a driving pulley, and the connecting rod 326 connects the driving pulley and the corresponding second pulley 321B, so that the driving pulley and the corresponding second pulley The 321B has the same rotational speed, and the first connection group 324A The traveling speed is the same as that of the second connection group 324B, so that the blade 33 can smoothly move in the first direction D1 or opposite to the first direction D1.

Referring to Fig. 9, there is shown a third embodiment of the three-dimensional printer of the present invention, which is substantially the same as the first embodiment except for the transfer unit 32 of the stirring mechanism 3.

The transfer unit 32 has a sliding track 327 spaced apart from the substrate 311 and adjacent to the first side 317 and the second side 318, and is slidably coupled to the sliding track 327 along the first a sliding member 328 that slides in the direction D1 relative to the sliding rail 327, a first connecting group 324A that connects the sliding member 328 and the blade 33, and a fixed sliding rail 327 and is disposed adjacent to the substrate 311 One of the first fixing brackets 325A of the connecting plate 314. It should be noted that the sliding rail 327 and the sliding member 328 in this embodiment are in the form of a linear motor.

The first connection group 324A has a connector 3241 that connects the sliding member 328. The connecting member 3241 has a receiving groove 3243. The first connecting group 324A further has an elastic member 3244 received in the receiving groove 3243, and a portion is received in the receiving groove 3243 and is abutted by the elastic member 3244. The shaft member 3245 has a contact with the substrate 311 and a roller 3242 connecting the coupling member 3245 and the blade 33.

The operation mode of the three-dimensional printer is substantially similar to that of the first embodiment, and only differences will be described below.

The agitating mechanism 3 starts driving to move the sliding member 328 along the first direction D1 relative to the sliding rail 327 from the first side 317 adjacent to the substrate 311 to the second side 318 to drive the first connection. Group 324A The direction of travel of the roller 3242 is moved from the first direction D1 to the second side 318, and the blade 332 of the blade 33 is rotated to uniformly mix the photosensitive resin with the dye to produce a photosensitive resin 8 having a uniform color.

On the other hand, when the roller 3242 of the first connection group 324A travels in the first direction D1 when contacting the substrate 311, the plane unevenness of the substrate 311 may occur, and the elastic member 3244 may be used. The elasticity enables the roller 3242 to smoothly pass through the plane unevenness of the substrate 311.

Referring to Figures 10 and 11, there is shown a fourth embodiment of the three-dimensional printer of the present invention, which is substantially identical to the first embodiment except for the transfer unit 32 of the agitation mechanism 3.

The transfer unit 32 has a tooth row 329 spaced apart from the substrate 311 and adjacent to the first side 317 and the second side 318, and is engaged with the tooth row 329 and opposite in a first direction D1. The gear row 329 linearly moves and connects the gear set 320 of the blade 33, a rotating motor 323 that drives the gear set 320 to rotate, a conveying track 323A extending along the first direction D1, and a sliding guide rail 323A. And a conveying member 323B that slides along the conveying direction 323A in a first direction D1 and is connected to the rotating motor 323, a fixing tooth row 329, the rotating motor 323 and the conveying rail 323A, and is disposed on the substrate 311 and adjacent to one of them. The first fixing bracket 325A of the connecting plate 314. The first fixing bracket 325A has a sliding slot 3251 extending along the first direction D1. The gear set 320 has three gears 3201 and each of the two gears 3201 is in mesh with each other. The rotating motor 323 has a motor body 3231 disposed on the conveying member 323B, and a connection The motor body 3231 extends through the mandrel 3232 of the chute 3251.

In the embodiment, the gear 3201 directly driven by the end portion of the spindle 3232 of the rotary motor 323 is a driving gear, and the conveying member 323B and the motor body 3231 of the rotating motor 323 are located at one side of the sliding slot 3251. The gear 3201 is located on the other side of the chute 3251. The function of the chute 3251 allows the driving gear, the rotating motor 323 and the conveying member 323B to travel in the first direction D1 in synchronization. Furthermore, the gear 3201 adjacent to the substrate 311 is coupled to the axis 331 of the blade 33 and coaxial with the axis 331.

The operation mode of the three-dimensional printer is substantially similar to that of the first embodiment, and only differences will be described below.

The rotation motor 323 of the stirring mechanism 3 starts to drive to rotate the gear set 320 in the first direction D1 relative to the tooth row 329 from the first side 317 adjacent to the substrate 311 to the second side 318. The rotating motor 323 can travel along the first direction D1 in synchronization with the conveying member 323B, and the driving direction of the blade 33 is moved from the first direction D1 to the second side 318 to rotate the blade 332 of the blade 33. The photosensitive resin is uniformly mixed with the dye to produce a photosensitive resin 8 having a uniform color.

It should be noted that since the number of teeth of the gear 3201 of the gear set 320 can be adjusted according to actual needs, the position of the blade 33 may be left with a gap between the substrate 311 and may be implemented.

In summary, the blade 33 is moved by the transfer unit 32 relative to the substrate 311 by the first side 317 along the first direction D1 to the second side 318, and the blade 332 of the blade 33 is rotated. Photosensitive resin The dyes are more uniformly mixed to produce a photosensitive resin 8 having a uniform color, and the color layered solid 1 is uniformly colored, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

2‧‧‧ Shell

21‧‧‧ housing

22‧‧‧Upper cover

23‧‧‧Internal space

3‧‧‧ mixing mechanism

4‧‧‧Rack

5‧‧‧ Laser agency

6‧‧‧Scanning agency

7‧‧‧Molding mechanism

71‧‧‧Forming arm

72‧‧‧Molding platform

Claims (16)

A stirring mechanism comprising: a receiving container defining a receiving space, the receiving container having a horizontally extending substrate, and an upper opening opposite to the substrate and communicating with the receiving space, the substrates having respective a first side and a second side on opposite sides of a first direction; a transfer unit movable from the first side to the second side relative to the substrate; and a blade The receiving space is disposed transversely to the first direction and is located on the substrate, and is connected to the transfer unit, and is moved by the transfer unit in the first direction. The stirring mechanism of claim 1, wherein the transfer unit has two first pulleys respectively adjacent to the first side and the second side, and one set is wound between the two first pulleys and spaced apart from the substrate The first drive belt, a rotary motor that drives the rotation of one of the first pulleys, and a first connection group that connects the first drive belt and the blade. The agitation mechanism of claim 2, wherein the blade has an axis extending transversely to the first direction, and a plurality of circumferentially spaced apart blades extending outwardly from the axis; A connecting group has a connecting member connecting the first driving belt, and a roller contacting the substrate and connecting the connecting member with the shaft center and coaxial with the shaft center. The stirring mechanism of claim 3, wherein the transfer unit further has two second pulleys respectively adjacent to the first side and the second side and spaced apart from the first pulleys, and the set is wound around the second Between the two pulleys and the base a second transmission belt spaced apart from each other on the upper and lower sides, a second connection group connecting the second transmission belt and the blade, and a connecting rod connecting one of the first pulleys and the corresponding second pulley, the second connection group The structure is the same as that of the first connection group. The stirring mechanism of claim 1, wherein the transfer unit has a sliding track spaced apart from the substrate and adjacent to the first side and the second side, and a sliding track is attached to the sliding track And a sliding member sliding along the sliding direction along the first direction, and a first connecting group connecting the sliding member and the blade. The agitating mechanism of claim 5, wherein the first connecting group has a connecting member connecting the sliding member, the connecting member has a receiving groove, and the first connecting group further has a receiving groove The elastic member, a portion of the coupling member received in the receiving groove and abutted by the elastic member, and a roller contacting the substrate and connecting the coupling member and the blade. The agitation mechanism of claim 1, wherein the transfer unit has a tooth row spaced apart from the substrate and adjacent to the first side and the second side, and is engaged with the tooth row and along the tooth row a first direction of movement relative to the row of teeth and a gear set connecting the blade, a rotating motor that drives the gear set to rotate, a conveying track extending along the first direction, and a sliding contact with the conveying track The first direction slides relative to the conveyor track and connects the conveyor of the rotary motor. The stirring mechanism of claim 7, wherein the transfer unit further has a first fixing bracket fixed to the tooth row, the rotating motor and the conveying rail, and disposed on the substrate, the gear set having a plurality of gears, Rotating horse Having a motor body disposed on the conveying member, and a mandrel connecting the motor body, the first fixing bracket has a sliding slot extending in the first direction for the mandrel to extend, the rotation The end portion of the mandrel of the motor directly drives one of the gears, and the gear adjacent to the substrate connects the blade. A three-dimensional printer includes: an outer casing having an inner space; a stirring mechanism disposed in the inner space and including a receiving container defining a receiving space, the receiving container having a horizontally extending substrate And a first opening and a second side opposite to the substrate and communicating with the receiving space, the substrate has a first side and a second side respectively opposite to a first direction, and a transfer unit is opposite to the substrate Moving from the first side to the second side in the first direction, and a blade, the receiving space is disposed transversely to the first direction and is located on the substrate, and is connected to the transfer unit, and is The transfer unit is driven to move along the first direction; a laser mechanism is disposed in the inner space and located below the container for emitting a laser beam; a scanning mechanism is disposed in the inner space and located at the a laser beam is reflected from the container below the receiving container; and a molding platform is disposed in the inner space and above the substrate, and can extend through the upper opening to move up and down relative to the container . The three-dimensional printer of claim 9, wherein the transfer unit has two a first pulley adjacent to the first side and the second side, a first transmission belt wound between the two first pulleys and spaced apart from the substrate, and a rotary motor driving one of the first pulleys And a first connection group connecting the first transmission belt and the blade. The three-dimensional printer of claim 10, wherein the blade has an axis extending transversely to the first direction, and a plurality of circumferentially spaced apart blades extending outwardly from the axis; The first connecting group has a connecting member connecting the first driving belt, and a roller contacting the substrate and connecting the connecting member with the shaft center and coaxial with the shaft center. The three-dimensional printer of claim 11, wherein the transfer unit further has two second pulleys respectively adjacent to the first side and the second side and spaced apart from the first pulleys, and the set is wound around a second transmission belt between the second pulleys and spaced apart from the upper and lower sides of the substrate, a second connection group connecting the second transmission belt and the blade, and a connecting one of the first pulleys and the corresponding second pulley The connecting rod has the same structure as the first connecting group. The three-dimensional printer according to claim 9, wherein the transfer unit has a sliding track spaced apart from the substrate and adjacent to the first side and the second side, and is slidably coupled to the sliding track a sliding member that moves the rail and slides along the first direction with respect to the sliding rail, and a first connecting group that connects the sliding member and the blade. The three-dimensional printer of claim 13, wherein the first connection group has a connecting member connecting the sliding member, the connecting member has a receiving groove, and the first connecting group further has a receiving capacity Slotted elastic part, part of the capacity a coupling member placed in the receiving groove and abutted by the elastic member, and a roller contacting the substrate and connecting the coupling member and the blade. The three-dimensional printer according to claim 9, wherein the transfer unit has a tooth row spaced apart from the substrate and adjacent to the first side and the second side, and is engaged with the tooth row and a gear set linearly moving relative to the row of teeth in a first direction and connected to the blade, a rotating motor driving the gear set, a conveying track extending in the first direction, and a sliding contact with the conveying track A conveying member that slides relative to the conveying rail in the first direction and is coupled to the rotating motor. The three-dimensional printer according to claim 15, wherein the transfer unit further has a first fixing bracket fixed to the tooth row, the rotating motor and the conveying track, and disposed on the substrate, the gear set having a plurality of gears The rotating motor has a motor body disposed on the conveying member, and a spindle connected to the motor body, the first fixing bracket has a sliding slot extending in the first direction for the mandrel to extend. The end portion of the spindle of the rotary motor directly drives one of the gears, and the gear adjacent to the substrate connects the blade.