CN220973350U - Sinking type photo-curing 3D printer - Google Patents

Abstract

The application discloses a sinking type photo-curing 3D printer, which comprises: the device comprises a frame, a trough assembly, a forming platform assembly, a curing module and a second moving mechanism; wherein the frame comprises a first support plate and a second support plate; the trough assembly is arranged between the first supporting plate and the second supporting plate and comprises a trough for containing photosensitive materials; the molding platform assembly comprises a molding platform and a first moving mechanism, wherein the first moving mechanism is used for driving the molding platform to move in the Z-axis direction; the curing module includes a light source assembly and a print screen assembly. According to the 3D printer, the photosensitive material is molded layer by layer on the upper surface of the molding platform from bottom to top, a sinking type 3D curing printing mode is adopted to replace a release film and other structures to obtain the pull-up type 3D printer, so that the loss of light source light rays is avoided, the printing precision and the printing efficiency are improved, the occurrence of plate falling is avoided, and the consumption of consumables in the 3D printing process is reduced.

Description

Sinking type photo-curing 3D printer

Technical Field

The application relates to the technical field of 3D printing, in particular to a sinking type photo-curing 3D printer.

Background

Currently, photo-curing 3D printers widely use a liquid crystal screen as a mask and cure a resin through a pattern displayed by the screen using UV ultraviolet light as a light source. In the prior art, a pull-up structure is generally adopted in a photo-curing printer, a trough of the photo-curing printer consists of a trough outer frame, a pressing ring and a release film, photo-curing resin is arranged in the trough, an ultraviolet light source is arranged below the trough, a printing screen is arranged between the upper part of the ultraviolet light source and the lower part of the trough and used for displaying patterns of each layer of a model, and a forming platform is arranged in an upper area of the trough. When the pull-up type photo-curing printer works, the following steps are that: the forming platform descends to the bottom of a trough filled with photo-curing resin, the ultraviolet light source emits light spots which can be distributed in the whole printing screen area, the cross section view showing the three-dimensional model on the printing screen penetrates through the release film of the trough and irradiates on the resin in the gap between the release film and the forming platform, so that the resin molecules in the gap between the release film and the forming platform are subjected to polymerization reaction, the resin molecules are cured into the shape of the printing screen display pattern, and the thickness of the cured resin layer is the gap height between the forming platform and the trough release film. The area where the pattern is not displayed on the screen is a black screen, and ultraviolet light can be effectively blocked from passing through, so that the resin corresponding to the area cannot undergo curing reaction. And then the forming platform starts to pull upwards, and because the lower surface of the forming platform is of a rigid structure and the upper surface of the forming platform is subjected to sand blasting treatment, the surface roughness is higher, and the bonding force between the cured resin layer and the forming platform is larger than the bonding force between the cured resin layer and the release film, when the forming platform is pulled upwards, the cured resin layer is adhered to the forming platform and is peeled off from the release film. When the next layer is printed, the forming platform descends to the resin tank again, a certain gap is reserved between the forming platform and the release film in the resin tank, and the forming platform and the release film are cycled and reciprocated in this way until the final printing of the model is completed.

However, the release film of the chute of the pull-up photo-curing printer is an elastic transparent film with service life, the elasticity of the release film is reduced after repeated pull-up stripping, so that the release film is loosened, the printing precision is not affected in time due to stripping, the adhesive force between the resin curing layer and the forming platform is smaller and smaller under the influence of the reduction of the stripping force after the release film is used for a long time, and a model which is not printed easily falls off from the forming platform, so that printing failure is caused, and the printing success rate is low; the ultraviolet light source is arranged below the trough, after printing is finished, the residual solidified small particles in the trough can be caused by the fact that the ultraviolet light source is not cleaned in place, the release film or the printing screen is easily damaged due to the fact that printing is continued, then resin in the trough leaks out of the trough and flows to the light source part below, and the light source part is permanently damaged; in addition, because the half printing screen is formed by pressing and laminating multiple layers of materials, light can not completely penetrate, and the trough is provided with a release film, so that light emitted by the light source can pass through multiple refraction losses when reaching a resin curing surface, and the printing precision is greatly reduced.

Therefore, it is necessary to provide a photo-curing 3D printer capable of avoiding the use of a release film, solving the loss of light emitted by an ultraviolet light source, improving the light utilization rate, and improving the printing precision and printing efficiency.

Disclosure of utility model

The application aims to solve the problems and provide a submerged photocuring 3D printer which can solve the problems of using a release film, solving the ultraviolet light loss, improving the utilization rate of ultraviolet light, and improving the printing precision and the printing efficiency.

In order to solve the technical problems, the technical scheme adopted by the application is as follows:

a submerged photo-curing 3D printer, comprising:

The rack comprises a first supporting plate and a second supporting plate, and the first supporting plate is positioned above the second supporting plate in the Z-axis direction;

The trough assembly is arranged between the first supporting plate and the second supporting plate and comprises a trough for containing photosensitive materials;

The forming platform assembly comprises a forming platform and a first moving mechanism, and the first moving mechanism is connected with and drives the forming platform to move relative to the trough assembly in the Z-axis direction;

The curing module comprises a light source assembly and a printing screen assembly, wherein the light source assembly is used for providing curing light and is arranged above the trough assembly; the printing screen assembly is arranged between the trough assembly and the light source assembly, and is configured to display a pattern composed of a shading area for shading the curing light and a light transmitting area for transmitting the curing light; and

And the second moving mechanism is connected with and drives the curing module to move relative to the trough assembly in the X-axis direction.

Preferably, a first opening is formed in the first supporting plate, and the forming platform is driven by the first moving mechanism to move in the Z-axis direction through the first opening.

Preferably, the curing module further comprises a third support plate, a doctor assembly and a third movement mechanism; the third support plate is arranged above the first support plate, the printing screen assembly is arranged on the third support plate, and the scraper assembly is arranged below the printing screen assembly; the third moving mechanism is arranged on the third supporting plate and used for driving the scraper component and the light source component to synchronously move in the X-axis direction.

Preferably, the third moving mechanism comprises a second driving piece arranged on the first side of the third supporting plate, a first Y-axis rotating rod connected with the second driving piece, first synchronous belt components symmetrically connected with two ends of the first Y-axis rotating rod along the X-axis, and a second guiding component arranged on the inner side of the first synchronous belt component in parallel; the second guide assembly is respectively connected with the light source assembly and the scraper assembly, and the adjacent first synchronous belt assembly and second guide assembly are connected through a first synchronous adapter.

Preferably, the second guiding assembly comprises a second X-axis guide rail, and a second sliding block and a third sliding block which are connected to the second X-axis guide rail, wherein the second sliding block is arranged close to the first side of the third supporting plate; one end of the first synchronous adapter is connected with the first synchronous belt assembly, the other end of the first synchronous adapter is connected with the second sliding block and the third sliding block respectively, the second sliding block is connected with the light source assembly, and the first synchronous adapter penetrates through the third supporting plate and then is connected with the scraper assembly in a downward extending mode; and a long hole is formed in the connecting area of the first synchronous adapter and the second sliding block.

Preferably, the light source assembly comprises a light source shell, an ultraviolet laser arranged on the light source shell, and an elastic positioning piece arranged on the plane of the light source shell facing the third supporting plate; and the first side and the second side of the third supporting plate are respectively provided with a positioning groove matched with the elastic positioning piece.

Preferably, the second moving mechanism comprises a third driving piece arranged on the first supporting plate and a second synchronous belt assembly connected with the third driving piece; the second synchronous belt assembly is connected to the third support plate through a second synchronous adapter.

Preferably, the second synchronous belt assembly comprises a first X-axis driving rotating rod, a first X-axis driven rotating rod, a second driving wheel, a second driven wheel, a second synchronous belt, a second transmission piece and a third transmission piece, wherein the first X-axis driven rotating rod is arranged in parallel with the first X-axis driving rotating rod, the second driving wheel is arranged at the end, close to the third driving piece, of the first X-axis driving rotating rod, the second driven wheel is arranged at the end, close to the third driving piece, of the first X-axis driven rotating rod, the second synchronous belt is wound on the second driving wheel and the second driven wheel, and the second transmission piece and the third transmission piece are respectively arranged on the first X-axis driving rotating rod and the first X-axis driven rotating rod.

Preferably, a tensioning assembly is arranged in the middle of the second synchronous belt, and comprises a mounting plate connected to the first supporting plate, a tensioning wheel arranged at the lower part of the mounting plate and contacted with the lower part of the second synchronous belt, and a tensioning screw arranged at the upper part of the mounting plate; the tensioning screw penetrates through the first supporting plate.

Preferably, the trough assembly further comprises a fourth moving mechanism arranged on the second supporting plate and used for driving the trough to move in the Z-axis direction; the fourth moving mechanism comprises a trough lifting platform for bearing the trough and a third synchronous belt assembly which is connected with the trough lifting platform and drives the trough lifting platform to move in the Z-axis direction.

The application has the beneficial effects that at least comprises:

According to the sinking type photo-curing 3D printer, through the cooperation of the forming platform assembly, the curing module, the second moving mechanism and the trough assembly, the photosensitive material is formed layer by layer on the upper surface of the forming platform from bottom to top, a sinking type 3D curing printing mode is adopted to replace a release film and other structures to obtain the pull-up type 3D printer, the loss of light source light is avoided, the printing precision and the printing efficiency are improved, the occurrence of plate dropping is avoided, and the consumption of consumables in the 3D printing process is reduced.

Drawings

FIG. 1 is a schematic diagram of a sinking photo-curing 3D printer according to the present application;

FIG. 2 is an exploded view of a submerged photo-curing 3D printer according to the present application;

FIG. 3 is a schematic structural view of a molding platform assembly;

FIG. 4 is a schematic diagram of a curing module;

FIG. 5 is an exploded view of the curing module;

FIG. 6 is a schematic view of the curing module as it moves closer to the first movement mechanism;

FIG. 7 is a schematic view of the curing module moving away from the first moving mechanism;

FIG. 8 is a schematic diagram of a mechanism of the second movement mechanism;

FIG. 9 is a schematic structural view of a trough assembly;

fig. 10 is a schematic structural view of a third timing belt assembly.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The description as it relates to "first", "second", etc. in the present application is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

In the description of the present application, the terms of orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application.

It should be noted that, in the present application, the X axis, the Y axis and the Z axis are spatially perpendicular to each other; azimuth refers to the direction along the Z axis away from the rack-mount floor, and downward refers to the direction along the Z axis toward the rack-mount floor. The first side and the second side are disposed opposite each other along an X axis, and the third side and the fourth side are disposed opposite each other along a Y axis.

Examples

As shown in fig. 1 and 2, the submerged photo-curing 3D printer according to the present application includes:

A frame 1, wherein the frame 1 comprises a first supporting plate 11 and a second supporting plate 12, and the first supporting plate 11 is arranged above the second supporting plate 12 in the Z-axis direction;

A chute assembly 5, the chute assembly 5 being provided between the first support plate 11 and the second support plate 12, the chute assembly 5 comprising a chute 51 for receiving a photosensitive material;

A shaping platform assembly 2, wherein the shaping platform assembly 2 comprises a shaping platform 21 and a first moving mechanism 22, and the first moving mechanism 22 is connected with and drives the shaping platform 21 to move relative to the trough assembly 5 in the Z-axis direction;

A curing module 3, wherein the curing module 3 comprises a light source assembly 33 and a printing screen assembly 32, and the light source assembly 33 is used for providing curing light and is arranged above the trough assembly 5; the printing screen assembly 32 is arranged between the trough assembly 5 and the light source assembly 33, and is configured to display a pattern composed of a shading area for shading the curing light and a light transmitting area for transmitting the curing light; and

And a second moving mechanism 4, wherein the second moving mechanism 4 is connected with and drives the curing module 3 to move relative to the trough assembly 5 in the X-axis direction. In the embodiment of the application, the X axis, the Y axis and the Z axis are mutually perpendicular in space.

The forming platform assembly 2, the curing module 3, the second moving mechanism 4 and the trough assembly 5 are matched together, so that the photosensitive material is formed layer by layer from bottom to top on the upper surface of the forming platform 21, a sinking 3D curing printing mode is adopted, a pull-up 3D printer is obtained by replacing a release film and other structures, the loss of light source light is avoided, the printing precision and the printing efficiency are improved, the occurrence of plate dropping is avoided, and the consumption of consumables in the 3D printing process is reduced.

As shown in fig. 3, the first supporting plate 11 is provided with a first opening, the molding platform 21 is driven by the first moving mechanism 22 to move in the Z-axis direction through the first opening, and the first opening and the notch of the trough 51 are disposed, that is, the molding platform 21 is projected in the trough 51 along the Z-axis;

The first moving mechanism 22 includes a first driving member 221 disposed on a first side of the first supporting plate 11, a first Z-axis rotating rod 222 connected to the first driving member 221, a first transmission member 223 cooperatively connected to the first Z-axis rotating rod 222, a platform cantilever 224 disposed on the first transmission member 223, platform transfer blocks 225 symmetrically disposed on both sides of the platform cantilever 224, and a Z-axis profile 226 disposed on a first side of the first supporting plate 11; the molding platform 21 is horizontally arranged on the platform adapter block 225; the horizontal plane is parallel to a plane formed by the X axis and the Y axis; a bearing seat 227 is arranged on the region of the Z-axis section bar 226 corresponding to the first end part of the first Z-axis rotating rod 222; the bearing block 227 is sleeved at the first end of the transmission rod and is used for fixing the first end of the transmission rod. Specifically, the first driving member 221 is disposed on a lower surface of the first side of the first support plate 11; a first guide component 228 connected with the platform cantilever 224 is arranged on the side wall of the Z-axis section bar 226 facing the first Z-axis rotating rod 222, and the first guide component 228 is arranged on two sides of the first Z-axis rotating rod 222 in parallel; the first guiding component 228 includes a first Z-axis guide rail 2281 disposed on the Z-axis profile 226 and a first slider 2282 cooperatively connected to the first Z-axis guide rail 2281, and the first slider 2282 is connected to the platform cantilever 224; the first guiding component 228 is connected to the platform cantilever 224, and when the platform cantilever 224 is driven by the first driving member 223 to move in the Z-axis direction, the first guiding component plays a guiding role on the platform cantilever 224, so that the stability of the movement of the platform cantilever 224 is improved, and further, the stability of the operation of the first movement mechanism 22 is improved.

Specifically, the platform adapter 225 is L-shaped, and includes a vertical portion connected to the platform cantilever 224 and a horizontal portion disposed at an end of the vertical portion away from the platform cantilever 224, and the molding platform 21 is disposed on the horizontal portion. In this embodiment, the first Z-axis rotating rod 222 is preferably a ball screw, and the first transmission member 223 is a screw nut cooperatively connected to the ball screw. In this embodiment, the first end of the first Z-axis rotating rod 222 refers to the end of the transmission rod near the first support plate 11.

As shown in fig. 4 and 5, the curing module 3 further includes a third support plate 31, a doctor assembly 34, and a third moving mechanism 35; the third supporting plate 31 is arranged above the first supporting plate 11, the printing screen assembly 32 is arranged on the third supporting plate 31, and the scraper assembly 34 is arranged below the printing screen assembly 32; the third moving mechanism 35 is provided on the third support plate 31 and is used for driving the scraper assembly 34 and the light source assembly 33 to move synchronously in the X-axis direction.

Further, the third moving mechanism 35 includes a second driving member 351 disposed on a first side of the third supporting plate 31, a first Y-axis rotating rod 352 connected to the second driving member 351, first synchronous belt assemblies 353 symmetrically connected to both ends of the first Y-axis rotating rod 352 along the X-axis, and a second guide assembly 354 disposed in parallel inside the first synchronous belt assemblies 353; the inner side refers to the opposite side of the two first timing belt assemblies 353.

The second guiding component 354 is connected to the light source component 33 and the scraper component 34, and adjacent first synchronous belt component 353 and second guiding component 354 are connected by a first synchronous adapter 355, that is, the first synchronous belt component 353 and the second guiding component 354 disposed on the same side of the third supporting plate 31 are connected by the first synchronous adapter 355. The second driving member 351 is preferably a biaxial motor; the third supporting plate 31 is provided with a mounting groove for mounting the printing screen assembly 32, and the printing screen assembly 32 is fixed in the mounting groove through a screen pressing block; the printing screen component 32 is formed by integrally pressing and laminating a black-and-white display screen, glass and OCA optical cement; the black-and-white display screen is arranged downwards, and the glass is arranged upwards; the first synchronization component and the first guide component 228 are disposed on either side of the mounting slot.

The first timing belt assembly 353 includes a first driving wheel 3531 disposed at an end of the first Y-axis rotating rod 352, a first driven wheel 3532 disposed at a position corresponding to the first driving wheel 3531 on the second side of the third supporting plate 31, and a first timing belt 3533 wound around the first driving wheel 3531 and the first driven wheel 3532, i.e. the first timing belt 3533 extends along the X-axis direction.

The second guiding assembly 354 includes a second X-axis guide rail 3541, and a second slider 3542 and a third slider 3543 connected to the second X-axis guide rail 3541, the second slider 3542 being disposed near the first side of the third support plate 31, the third slider 3543 being disposed far from the first side of the third support plate 31; one end of the first synchronization adapter 355 is connected to the first synchronization belt 3533, the other end is connected to the second slider 3542 and the third slider 3543, respectively, the second slider 3542 is connected to the light source assembly 33, and the first synchronization adapter 355 passes through the third support plate 31 and then extends downward to be connected to the scraper assembly 34; the area where the first synchronous adapter 355 is connected to the second slider 3542 is provided with a long hole, so that the second slider 3542 can be movably connected to the first synchronous adapter 355, and further, the second slider 3542 and the third slider 3543 can move relatively.

The scraper assembly 34 comprises a scraper 341 and scraper fixing blocks 342 which are arranged at two ends of the scraper 341 and connected with the first synchronous adapter 355; the scraper fixing block 342 is fixedly connected to the first synchronous adapter 355 when connected. The first driving wheel 3531 and the first driven wheel 3532, which are far away from the second driving member 351, are both disposed on the third supporting plate 31 through a rotating wheel seat.

In the printing process, the molding platform 21 is driven by the first moving mechanism 22 to move in the trough 51 in the Z-axis direction, so that the photosensitive material in the trough 51 is photo-cured on the upper surface of the molding platform 21 and molded layer by layer; during the reciprocal movement of the light source assembly 33 and the doctor assembly 34 in synchronization with and away from the first moving mechanism 22 along the X-axis, the doctor assembly 34 remains positioned in front of the light source assembly 33 in the advancing direction, thereby keeping the doctor assembly 34 capable of doctoring the photosensitive material before it is photo-cured for molding.

The light source assembly 33 includes a light source housing 331, an ultraviolet laser 332 disposed on the light source housing 331, and an elastic positioning member 333 disposed on a plane of the light source housing 331 facing the third support plate 31; the elastic positioning member 333 is preferably a wave bead positioning screw; the first side and the second side of the third support plate 31 are respectively provided with a positioning groove matched with the elastic positioning piece 333; specifically, the positioning grooves are respectively disposed corresponding to two points of maximum displacement of the elastic positioning member 333 along the X axis;

As shown in fig. 6 and 7, the elastic positioning member 333 is matched with the positioning groove, so that when the light source assembly 33 is driven by the third moving mechanism 35 to move synchronously with the doctor assembly 34, and when the light source assembly moves to the position farthest and/or closest to the first moving mechanism 22, the positioning groove is matched with the elastic positioning member 333 to elastically limit the light source assembly 33, so that the light source assembly 33 delays moving, and then moves relatively with the doctor assembly 34, the doctor assembly 34 is always positioned in front of the movement direction of the strip-shaped ultraviolet spot emitted by the light source assembly 33 during synchronous movement, and then the doctor 341 is ensured to scratch the photosensitive material before performing ultraviolet irradiation curing molding during printing of each layer, thereby avoiding redundant curing phenomenon of the model and ensuring printing precision.

Further, the third moving mechanism 35 further includes a limit switch disposed on the second side of the third support plate 31 and a limit piece disposed on the first synchronous adapter 355, where the limit switch is electrically connected to the second driving member 351, and the limit switch and the limit piece cooperate to limit the movement of the first synchronous adapter 355, so as to limit the light source assembly 33 and the scraper assembly 34, lock the movement of the third support plate 31 along the X axis, and improve the running stability of the device.

As shown in fig. 8, the second moving mechanism 4 includes a third driving member 41 provided to the first supporting plate 11 and a second timing belt assembly 42 connected to the third driving member 41; the second timing belt assembly 42 is connected to the third support plate 31 via a second timing adapter 43. Wherein the output end of the third driving member 41 faces the first side direction. Preferably, the third driving member 41 is provided on the lower surface of the first support plate 11.

Preferably, the second moving mechanism 4 is provided on a lower surface of the second side of the first support plate 11 in order to reduce interference with the first moving mechanism 22 and the like. The third driving member 41 is preferably a trapezoidal screw motor, and the first driving transmission rod and the first driven transmission rod are both preferably trapezoidal screws. The second timing belt assembly 42 includes a first X-axis driving rod 421 disposed at an output end of the third driving member 41 along an X-axis, a first X-axis driven rod 422 disposed parallel to the first X-axis driving rod 421, a second driving wheel 423 disposed at an end of the first X-axis driving rod 421 near the third driving member 41, a second driven wheel 424 disposed at an end of the first X-axis driven rod 422 near the third driving member 41, a second timing belt 425 wound around the second driving wheel 423 and the second driven wheel 424, and a second transmission member 426 and a third transmission member 427 disposed on the first X-axis driving rod 421 and the first X-axis driven rod 422, respectively; the second timing belt 425 is disposed along the Y-axis. The first X-axis driving rotating rod 421 and the first X-axis driven rotating rod 422 are respectively disposed at the third side and the fourth side of the first supporting plate 11; the second synchronous adapter 43 is connected to the second transmission member 426 and the third transmission member 427, respectively.

Further, a tensioning assembly 44 is disposed in the middle of the second timing belt 425, and the tensioning assembly 44 includes a mounting plate 441 connected to the first supporting plate 11, a tensioning wheel 442 disposed at the lower portion of the mounting plate 441 and contacting the lower portion of the second timing belt 425, and a tensioning screw 443 disposed at the upper portion of the mounting plate 441; the tension screw 443 is provided through the first support plate 11; in use, the second synchronous belt 425 is kept stable in motion by tightening the tension screw 443 above, and the second synchronous belt is not loosened and does not jump teeth.

As shown in fig. 9 and 10, the trough assembly 5 further includes a fourth moving mechanism provided on the second support plate 12 for driving the trough 51 to move in the Z-axis direction; the fourth moving mechanism comprises a trough lifting platform 52 for bearing the trough 51, and a third synchronous belt assembly 53 which is connected with the trough lifting platform 52 and drives the trough lifting platform 52 to move in the Z-axis direction. The third timing belt assembly 53 includes a fourth driving member 531, a second Z-axis rotating rod 532 symmetrically disposed on two sides of the trough lifting platform 52, a fourth driving member 533 disposed on the second Z-axis rotating rod 532, a fixed seat 534 disposed on the second support plate 12 and connected to the bottom of the second Z-axis rotating rod 532, a third driven wheel 535 disposed on the fixed seat 534 and used for driving the fourth driving member 533 to rotate, and a third timing belt 536 wound around the output end of the fourth driving member 531 and the third driven wheel 535; the fourth transmission member 533 is connected to the trough elevating platform 52.

The top of the trough lifting platform 52 is provided with an ear plate extending away from the trough 51, and the ear plate is connected with the second Z-axis rotating rod 532; the fourth transmission member 533 is a strip-shaped plate arranged along the Y axis; in order to improve the stability of the movement of the trough elevating platform 52 in the Z-axis direction, the third timing belt assembly 53 further includes Z-axis guide rods 537 symmetrically disposed on both sides of the second Z-axis rotating rod 532 along the Y-axis, and a limiting assembly 538.

The Z-axis guide rod 537 is connected to the fourth transmission member 533 and the trough elevating platform 52, and the limit assembly 538 includes a limit switch disposed on the second support plate 12 and a limit piece disposed on the trough elevating platform 52 and corresponding to the limit switch. A handle is arranged on the trough 51 to facilitate the trough 51 to be pulled out from the trough lifting platform 52 of the fourth moving mechanism. The lower surface of the second support plate 12 is provided with foot pads, and the foot pads at least comprise 4 foot pads distributed at four corners of the second support plate 12. The fourth driving member 531 is preferably a trapezoidal motor, and the second Z-axis rotating rod 532 is preferably a trapezoidal screw.

When the sinking type photo-curing 3D printer is used for printing, the following steps are carried out:

The second moving mechanism 4 drives the third supporting plate 31 to move along the X-axis towards a direction away from the first moving mechanism 22, and further drives the printing screen assembly 32, the light source assembly 33 and the scraper assembly 34 to move away from the first moving mechanism 22, so as to descend along the Z-axis for the forming platform 21 to be placed into the trough 51 for avoiding; the forming platform 21 is driven by the first moving mechanism 22 to descend along the Z axis and is placed in the trough 51; the second moving mechanism 4 moves reversely to drive the printing screen assembly 32, the light source assembly 33 and the scraper assembly 34 to move to a position close to the first moving mechanism 22;

In the printing process, the third moving mechanism 35 drives the scraper assembly 34 and the light source assembly 33 to reciprocate along the X-axis, so as to cure and mold the photosensitive material layer by layer on the molding platform 21.

The second moving mechanism 4 drives the curing module 3 to move in the X-axis direction so that the curing module 3 is close to or far from the first moving mechanism 22, before printing, the curing module 3 is driven to move in the direction far from the first moving mechanism 22, so that the forming platform 21 is placed in the trough 51, during printing, the second moving mechanism 4 drives the curing module 3 to be correspondingly arranged with the forming platform 21, after printing, the second moving mechanism 4 drives the curing module 3 to move in the direction far from the first moving mechanism 22, so that a rising space is reserved for the forming platform 21 and a model formed on the forming platform 21 to be moved upwards out of the trough 51; the fourth moving mechanism of the trough assembly 5 drives the trough 51 to move in the Z-axis direction, the setting position of the trough 51 can be adjusted, and the adjustability and applicability of the 3D printer are improved.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples only represent preferred embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A submerged photo-curing 3D printer, comprising:

The rack comprises a first supporting plate and a second supporting plate, and the first supporting plate is positioned above the second supporting plate in the Z-axis direction;

The trough assembly is arranged between the first supporting plate and the second supporting plate and comprises a trough for containing photosensitive materials;

The forming platform assembly comprises a forming platform and a first moving mechanism, and the first moving mechanism is connected with and drives the forming platform to move relative to the trough assembly in the Z-axis direction;

The curing module comprises a light source assembly and a printing screen assembly, wherein the light source assembly is used for providing curing light and is arranged above the trough assembly; the printing screen assembly is arranged between the trough assembly and the light source assembly, and is configured to display a pattern composed of a shading area for shading the curing light and a light transmitting area for transmitting the curing light; and

And the second moving mechanism is connected with and drives the curing module to move relative to the trough assembly in the X-axis direction.

2. The submerged photocuring 3D printer of claim 1, wherein the first support plate is provided with a first opening, and the molding platform is driven by the first moving mechanism to move in the Z-axis direction through the first opening.

3. The submerged photocuring 3D printer of claim 1, wherein the curing module further comprises a third support plate, a doctor blade assembly, and a third movement mechanism; the third support plate is arranged above the first support plate, the printing screen assembly is arranged on the third support plate, and the scraper assembly is arranged below the printing screen assembly; the third moving mechanism is arranged on the third supporting plate and used for driving the scraper component and the light source component to synchronously move in the X-axis direction.

4. The submerged photocuring 3D printer of claim 3, wherein the third moving mechanism comprises a second driving member provided at a first side of the third supporting plate, a first Y-axis rotating rod connected to the second driving member, first synchronous belt assemblies symmetrically connected to both ends of the first Y-axis rotating rod along an X-axis, and a second guide assembly provided in parallel inside the first synchronous belt assemblies; the second guide assembly is respectively connected with the light source assembly and the scraper assembly, and the adjacent first synchronous belt assembly and second guide assembly are connected through a first synchronous adapter.

5. The submerged photocuring 3D printer of claim 4, wherein the second guiding assembly comprises a second X-axis rail and second and third sliders connected to the second X-axis rail, the second slider being disposed proximate to the first side of the third support plate; one end of the first synchronous adapter is connected with the first synchronous belt assembly, the other end of the first synchronous adapter is connected with the second sliding block and the third sliding block respectively, the second sliding block is connected with the light source assembly, and the first synchronous adapter penetrates through the third supporting plate and then is connected with the scraper assembly in a downward extending mode; and a long hole is formed in the connecting area of the first synchronous adapter and the second sliding block.

6. The submerged photocuring 3D printer of claim 5, wherein the light source assembly comprises a light source housing, an ultraviolet laser disposed on the light source housing, and an elastic positioning member disposed on a plane of the light source housing facing the third support plate; and the first side and the second side of the third supporting plate are respectively provided with a positioning groove matched with the elastic positioning piece.

7. The submerged photocuring 3D printer of claim 5, wherein the second moving mechanism comprises a third driving member provided to the first supporting plate and a second timing belt assembly connected to the third driving member; the second synchronous belt assembly is connected to the third support plate through a second synchronous adapter.

8. The submerged photocuring 3D printer of claim 7, wherein the second timing belt assembly comprises a first X-axis driving rotating rod, a first X-axis driven rotating rod arranged in parallel with the first X-axis driving rotating rod, a second driving wheel arranged at the end of the first X-axis driving rotating rod near the third driving member, a second driven wheel arranged at the end of the first X-axis driven rotating rod near the third driving member, a second timing belt wound around the second driving wheel and the second driven wheel, and a second transmission member and a third transmission member respectively arranged on the first X-axis driving rotating rod and the first X-axis driven rotating rod.

9. The submerged photocuring 3D printer according to claim 8, wherein a tensioning assembly is arranged in the middle of the second synchronous belt, and comprises a mounting plate connected to the first support plate, a tensioning wheel arranged at the lower part of the mounting plate and contacted with the lower part of the second synchronous belt, and a tensioning screw arranged at the upper part of the mounting plate; the tensioning screw penetrates through the first supporting plate.

10. The submerged photocuring 3D printer of claim 1, further comprising a fourth moving mechanism provided on the second support plate for driving the chute to move in the Z-axis direction; the fourth moving mechanism comprises a trough lifting platform for bearing the trough and a third synchronous belt assembly which is connected with the trough lifting platform and drives the trough lifting platform to move in the Z-axis direction.