CN220297852U

CN220297852U - Three-dimensional forming equipment

Info

Publication number: CN220297852U
Application number: CN202321902854.XU
Authority: CN
Inventors: 韦华忠; 请求不公布姓名
Original assignee: Shenzhen Anycubic Technology Co Ltd
Current assignee: Shenzhen Anycubic Technology Co Ltd
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-01-05
Anticipated expiration: 2033-07-19

Abstract

The utility model provides a three-dimensional forming device. The three-dimensional molding device includes: the upper bottom plate is provided with a light hole and a convex part positioned at the periphery of the light hole; the trough assembly comprises a release film and trough frames with openings at two ends, and the release film is connected with the trough frames to seal the bottom opening of the trough frames; the trough frame is arranged on the upper bottom plate, the upper surface of the convex part is higher than the installation bottom surface of the trough frame, and the release film is propped up to be tensioned. Therefore, the part of the release film connected to the bottom of the trough frame is jacked up by the convex part, so that the release film is tensioned, the structure is simple, the release film is easy to realize, the trough assembly is convenient to assemble and manufacture, and the manufacturing cost is reduced.

Description

Three-dimensional forming equipment

Technical Field

The utility model relates to the technical field of printing equipment, in particular to three-dimensional forming equipment.

Background

The stereo forming equipment is one kind of accumulating and producing technology, and is one kind of machine for fast forming technology, and is one kind of digital model file based on special wax material, powdered metal or plastic and other adhesive material to produce three-dimensional object.

The light curing stereo forming equipment adopts light curing printing technology, light curing takes photosensitive resin as raw material, light with specific wavelength and intensity is focused on the surface of a light curing material, so that the light is sequentially solidified from point to line from line to surface, one layer of layer is cured, then the height of one layer of layer is moved in the vertical direction, the other layer of layer is cured, and the three-dimensional entity is formed by overlapping layer by layer in sequence.

Wherein, the three-dimensional former of photocuring is including being used for holding the silo subassembly of resin, in order to reduce the deformation of silo subassembly from the type membrane and influence the printing effect, as the prior art of publication No. CN214164031U, a photocuring 3D printer silo is disclosed, this silo includes the silo main part, spacing layering, compress tightly layering and from the type membrane, wherein from the type membrane is located silo main part bottom, and the lower extreme surface laminating spacing layering and the compression layering of silo main part, spacing layering is located compression layering top, and both are connected through fastening screw, the silo main part passes through the tensioning screw with spacing layering and is connected, the tensioning degree of adjustable from the type membrane of tensioning screw. However, the trough assembly of this type is relatively complex in structure.

Disclosure of Invention

In view of the above, the utility model provides a stereoscopic molding device to solve the defect of complex release film tensioning structure in the prior art.

The utility model provides a three-dimensional forming device, which comprises an upper bottom plate, wherein the upper bottom plate is provided with a light hole and a convex part positioned on the periphery of the light hole; the trough assembly comprises a release film and trough frames with openings at two ends, and the release film is connected with the trough frames to seal the bottom opening of the trough frames; the trough frame is arranged on the upper bottom plate, the upper surface of the convex part is higher than the installation bottom surface of the trough frame, and the convex part props the release film so as to tension the release film.

Optionally, an installation groove is formed in the upper bottom plate and is located on the periphery of the light hole, and a convex part is formed between the installation groove and the light hole.

Optionally, the stereolithography apparatus further comprises: the locking mechanism is at least arranged on the upper bottom plate and is used for locking the trough assembly on the upper bottom plate; the locking mechanism comprises a locking screw, a first connecting hole is formed in the trough frame, a second connecting hole is formed in the upper bottom plate, and the locking screw penetrates through the first connecting hole and is connected with the second connecting hole so as to lock the trough frame on the upper bottom plate; the second connecting hole extends into the mounting groove from one side of the mounting groove away from the light hole; the two second connecting holes are distributed along the length direction of the upper bottom plate; or the locking mechanism comprises a clamping groove arranged on the trough frame and a buckle arranged on the upper bottom plate, and the clamping groove is matched with the buckle to lock the trough frame on the upper bottom plate; wherein, two buckles are disposed in the both sides of mounting groove along the length direction of upper plate.

Optionally, the bottom surface of the trough frame is positioned in the mounting groove, and the top surface of the convex part is higher than the bottom surface of the trough frame; wherein, the distance between the top surface of the convex part and the bottom surface of the mounting groove is 0.3mm to 1mm; the convex part is of an annular structure, or the convex part is a plurality of convex blocks distributed at intervals along the periphery of the mounting groove.

Optionally, a first limiting part is arranged at the bottom of the mounting groove, a second limiting part is arranged at the bottom surface of the groove frame, and the first limiting part and the second limiting part are matched and used for limiting the movement of the groove frame relative to the upper bottom plate; one of the first limiting part and the second limiting part is of a groove structure, and the other one is of a protruding structure.

Optionally, the upper bottom plate is provided with a third limiting part, at least one side wall of the mounting groove is connected with the third limiting part, the side surface of the trough frame is provided with a fourth limiting part, and the third limiting part and the fourth limiting part are matched and used for limiting the movement of the trough frame relative to the upper bottom plate; the third limiting part is a slot, the fourth limiting part is an inserting block, and the opening direction of the slot is perpendicular to the opening direction of the mounting groove; the two slots are distributed on the same side of the mounting groove along the length direction of the upper bottom plate.

Optionally, the stereolithography apparatus further comprises: the device comprises a support main body and a vertical movement mechanism, wherein the support main body comprises an upper bottom plate, and the vertical movement mechanism is connected with the support main body; the third limiting part is connected with the side wall of one side of the mounting groove, which is close to the vertical movement mechanism.

Optionally, the stereo forming device further comprises a screen adjusting assembly, wherein the screen adjusting assembly comprises a floating platform, and the floating platform is positioned at the light hole and is movable relative to the upper bottom plate; the corner of the floating platform is provided with a first matching part which is of a cambered surface structure.

Optionally, the stereoscopic forming device further comprises a forming platform and a screen assembly, wherein the forming platform and the vertical movement mechanism; the inner wall of the light hole is provided with a mounting boss, and the screen assembly is connected with the upper bottom plate (110) through the mounting boss; the screen assembly comprises a screen and a floating plate arranged on the periphery of the screen, wherein the transverse length of the forming platform is greater than that of the screen, and/or the longitudinal length of the forming platform is greater than that of the screen;

the vertical movement mechanism further comprises a driving part, and the driving part is arranged in the supporting main body; the side of drive division is provided with the bending plate, and the bending plate includes first board and second board, has the contained angle between first board and the second board, and first board is used for fixing screen assembly's winding displacement, and the second board is used for protecting and supports the main control board in the main part.

Optionally, the release film is detachably connected with the trough frame; or the release film and the trough frame are integrally formed in an injection molding mode.

According to the stereoscopic forming equipment provided by the embodiment of the utility model, the trough frame of the trough assembly is arranged on the upper bottom plate, the upper bottom plate forms the convex part between the trough frame and the light holes, and the upper surface of the convex part is higher than the installation bottom surface of the trough frame, so that when the bottom surface of the trough frame of the trough assembly is arranged on the upper bottom plate, the convex part between the trough frame and the light holes is abutted with the partial separation type film due to the fact that the separation type film is connected on the installation bottom surface of the trough frame, so that the partial separation type film contacted with the convex part has a height difference compared with the separation type film connected with the installation bottom surface of the trough frame, namely, at least one part of the separation type film is supported by the convex part to be pressed and deformed, and therefore, the separation type film can be tensioned, and the quality of a printing model is improved. Compared with the prior art that the release film is tensioned by using the tensioning screw, the structure of the trough assembly is simplified, the trough assembly is convenient to assemble and manufacture, the manufacturing cost is reduced, the assembly efficiency is improved, and the device is suitable for popularization and application.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

fig. 1 is a schematic view showing a structure of a trough assembly of a stereolithography apparatus according to an embodiment of the present utility model in a separated state from an upper base plate;

FIG. 2 shows a schematic partial view of the trough assembly of the embodiment of FIG. 1 assembled with an upper floor;

FIG. 3 shows a cross-sectional view of the embodiment of FIG. 2 from one perspective;

FIG. 4 shows an enlarged partial schematic view at A of the embodiment of FIG. 3;

fig. 5 is a schematic view showing a structure of a trough assembly of a stereoscopic forming apparatus according to another embodiment of the present utility model in a separated state from an upper base plate;

FIG. 6 shows a schematic view of a portion of the trough assembly of the embodiment of FIG. 5 assembled with an upper floor;

FIG. 7 illustrates a partially exploded schematic view of a stereolithography apparatus including a screen adjustment assembly, provided in accordance with one embodiment of the present utility model;

FIG. 8 illustrates a schematic structural view of a floating platform and upper floor in a relative position provided by an embodiment of the present utility model;

FIG. 9 illustrates a schematic structural view of another relative position of a floating platform and an upper floor provided by one embodiment of the present utility model;

FIG. 10 illustrates a schematic structural view of a floating platform and upper floor in yet another relative position provided by one embodiment of the present utility model;

FIG. 11 illustrates a schematic structural view of a floating platform provided by one embodiment of the present utility model;

FIG. 12 illustrates an exploded view of a screen adjustment assembly and an upper floor provided by one embodiment of the present utility model;

FIG. 13 illustrates a force diagram of a floating platform during leveling of a profiled platform provided in accordance with one embodiment of the present utility model;

FIG. 14 shows a schematic structural view of the embodiment of FIG. 12 from another perspective;

FIG. 15 is an exploded view of a screen adjustment assembly and an upper floor provided in accordance with another embodiment of the present utility model;

FIG. 16 shows a schematic structural view of the embodiment of FIG. 15 from another perspective;

FIG. 17 is a schematic view showing a part of the construction of the embodiment shown in FIG. 15;

FIG. 18 shows a schematic view of a perspective molding apparatus according to yet another embodiment of the present utility model;

FIG. 19 shows a partial schematic view of the embodiment of FIG. 18 from another perspective;

FIG. 20 is a schematic view of a portion of the forming table of the embodiment of FIG. 18 in another view from another location;

FIG. 21 shows an exploded view of a position detection device provided by an embodiment of the present utility model;

fig. 22 shows a schematic exploded view of the push switch body provided by one embodiment of the present utility model;

fig. 23 shows a cross-sectional view of a position detection apparatus provided by an embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 23 is:

100 supporting body, 110 upper bottom plate, 111 light hole, 112 mounting groove, 113 convex part, 114 first limit part, 115 third limit part, 116 mounting boss, 117 second connecting hole, 118 second match part, 1181 holding groove, 120Z-axis support, 200 trough component, 210 release film, 220 trough frame, 221 first connecting hole, 300 vertical motion mechanism, 310 driving part, 320 transmission part, 330 bent plate, 400 screen component, 400' screen adjusting component, 410' floating platform, 411 first match part, 420' limit block, 430' upper limit plate, 440' lower limit plate, 441' spring leaf, 442 flat plate ',450' first connecting bolt, 460' second connecting bolt, 500 locking mechanism, 510 locking screw, 520 clamping groove, 530 buckle, 600 elastic component, 700 forming platform, 800 light source component, 900 position detecting device, 910 sensing component, 920 photoelectric switch, 930 outer shell, 940 pushing switch main body, 941 inner shell, 94942 moving component, 943 first conductive part, 943 second conductive part, 944 third conductive part, 6 elastic component, 7 reset spring piece, 950, 8 guide post, 950, 9 locking spring piece, 9.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

A stereolithography apparatus according to some embodiments of the present utility model, which may be a photo-curing three-dimensional printer, is described below with reference to fig. 1 to 23.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a stereolithography apparatus, including: an upper base plate 110, wherein a light hole 111 and a convex portion 113 positioned on the periphery of the light hole 111 are formed on the upper base plate 110; the trough assembly 200 comprises a release film 210 and a trough frame 220 with two open ends, wherein the release film 210 is connected with the trough frame 220 to seal the bottom opening of the trough frame 220; wherein, the trough frame 220 is mounted on the upper base plate 110, the upper surface of the convex portion 113 is higher than the mounting bottom surface of the trough frame 220, and the convex portion 113 supports the release film 210 to tighten the release film 210.

The release film 210 is configured as a flexible member, so that the release film 210 can deform under the action of external force. The release film 210 is connected with the trough frame 220 to close the bottom opening of the trough frame 220, i.e., the release film 210 is connected to the bottom surface of the trough frame 220.

In this embodiment, the trough frame 220 is mounted within the mounting trough 112 to mount the trough assembly 200 on the upper floor 110, and in particular, the trough assembly 200 is positioned above the light apertures 111 opposite the light apertures 111. The upper base plate 110 forms a convex portion 113 between the bottom of the mounting groove 112 and the light-transmitting hole 111, i.e., the convex portion 113 is located at a side of the mounting groove 112 near the light-transmitting hole 111, and the upper surface of the convex portion 113 is higher than the bottom surface of the mounting groove 112. Thus, when the trough frame 220 of the trough assembly 200 is installed in the installation trough 112, the bottom surface of the trough frame 220 is located in the installation trough 112, and the release film 210 is connected to the bottom surface of the trough frame 220, so that the convex portion 113 formed between the installation trough 112 and the light hole 111 is abutted against a part of the release film 210, so that the convex portion 113 can jack up the part of the release film 210 compared with the release film 210 connected to the bottom surface of the trough frame 220, that is, the convex portion 113 deforms at least a part of the release film 210 under compression, thereby enabling the release film 210 to be tensioned (since the top surface of the convex portion 113 has a certain height difference with the bottom surface of the installation trough 112, and the peripheral edge of the release film 210 is fixed on the trough frame 220, the area of the release film 210 is pulled and increased by the height difference, thereby enabling the tension of the release film 210 to be increased, so that the release film 210 is tensioned), and the quality of the printing model is improved.

That is, the present utility model has the advantages that the structure of the upper base plate 110 is reasonably arranged, the convex part 113 is formed between the light hole 111 of the upper base plate 110 and the mounting groove 112, the bottom surface of the trough frame 220 of the trough assembly 200 is mounted in the mounting groove 112, the release film 210 connected to the bottom of the trough frame 220 is supported by the convex part 113, so as to tension the release film 210, the structure is simple, the implementation is easy, compared with the prior art that the release film is required to be tensioned by using the tensioning screw, the structure of the trough assembly 200 is simplified, the assembly and the manufacture of the trough assembly 200 are convenient, the manufacturing cost is reduced, the assembly efficiency is improved, and the present utility model is suitable for popularization and application.

In another embodiment, the upper base plate 110 is provided with a light hole 111, and a protrusion 113 is disposed on a peripheral side of the light hole 111, and an upper surface of the protrusion 113 is higher than an upper surface of the upper base plate; the convex portion 113 may be disposed at one side or more sides of the light transmitting hole 111. When the trough frame 220 is installed, the trough frame 220 is installed on the upper base plate 110 by a bracket, and the trough frame 220 is fixed by a screw or a buckling mode. The upper surface of the protruding portion 113 is higher than the installation bottom surface of the trough frame 220 (i.e. the surface of the trough frame 220 opposite to the upper base plate 110), and the trough frame 220 and the light holes 111 are respectively located at different sides of the protruding portion 113, so that the protruding portion 113 can prop the release film 210 on the trough frame 220, the release film 210 is tensioned by utilizing the height difference, the tensioning degree of adjusting the release film 210 by using tensioning screws is saved, and the quality of a printing model is improved.

In another embodiment, the upper base plate 110 may be provided with both the mounting groove 112 and the protrusion 113, and both the mounting groove 112 and the protrusion 113 are located at the peripheral side of the light-transmitting hole 111. The mounting groove 112 is used for mounting the groove frame 220, and the groove bottom of the mounting groove 112 and the light transmitting hole 111 are respectively located at different sides of the protruding portion 113. By superposing the convex portion 113 on the wall of the mounting groove 112, which is close to the light hole, the height difference can be further increased, the tensioning degree of the release film 210 after the trough frame 220 is mounted can be improved, and the quality of the printing model can be further improved. The fit between the mounting slot 112 and the slot frame 220 is as in the above embodiment, and will not be described herein.

Meanwhile, according to the embodiment of the utility model, the dependence of the release film 210 on the flatness of the trough frame 220 can be reduced, so that the release film 210 does not need to be in a complete tensioning state after being assembled with the trough frame 220; in the process of connecting the trough assembly 200 with the upper base plate 110, the tensioning of the release film 210 is realized through the convex part 113 of the upper base plate 110, so that the variety of tensioning structures of the release film 210 is enriched, the number of tensioning screws is not required to be limited and the assembly is not required to be limited, the structure of the trough assembly 200 is simplified, the assembly efficiency and the production efficiency of the trough assembly 200 are improved, and meanwhile, the release film 210 can be ensured to have good tensioning performance, and the printing effect is not influenced.

Since the release film 210 in the embodiment is in a fully tensioned state (can reach a common pre-tightening state) without being in the trough frame 220, there are more assembling or molding methods between the release film 210 and the trough frame 220 to meet the requirements of scenes and production cost, so as to reduce production cost, improve assembly efficiency, and the like. In some possible embodiments provided by the present utility model, the release film 210 and the trough frame 220 are detachably connected, thereby facilitating assembly and installation of the trough assembly 200, and being beneficial to improving assembly and production efficiency of the trough assembly 200.

In other possible embodiments provided by the present utility model, the release film 210 and the trough frame 220 are integrally formed by injection molding, thereby facilitating assembly and production of the trough assembly 200, and being beneficial to improving assembly and production efficiency of the trough assembly 200.

As shown in fig. 1, 2, 5 and 6, in some possible embodiments of the present utility model, the stereolithography apparatus further includes: locking mechanism 500, locking mechanism 500 is mounted at least on upper base plate 110, locking mechanism 500 is used to lock trough assembly 200 to upper base plate 110.

The locking mechanism 500 can improve the connection reliability between the trough assembly 200 and the upper plate 110, and further can reliably position the bottom surface of the trough frame 220 in the mounting groove 112, so that the problem that the trough assembly 200 is not firmly connected with the upper plate 110, and the bottom surface of the trough frame 220 is positioned outside the mounting groove 112, and the convex portion 113 cannot abut against the release film 210 is solved, the convex portion 113 can reliably abut against the release film 210, and the split release film 210 connected with the bottom surface of the trough frame 220 is lifted up, and therefore, the convex portion 113 can reliably realize tensioning of the release film 210 is ensured.

It will be appreciated that adjusting the state of the locking mechanism 500 can lock the trough assembly 200 to the upper floor 110 when the locking mechanism 500 is in the locked state, and can remove the trough assembly 200 from the upper floor 110 or place the trough assembly 200 at the mounting slot 112 of the upper floor 110 when the locking mechanism 500 is in the released state.

In the above embodiment, the locking mechanism 500 includes at least one of the locking screw 510, the clamping mechanism and the mortise and tenon structure, and different forms of the locking mechanism 500 can meet the requirements of different structures and different assembly modes of the three-dimensional forming device.

As shown in fig. 1 and 2, in some possible embodiments of the present utility model, the locking mechanism 500 includes a locking screw 510, a first connecting hole 221 is formed on the trough frame 220, a second connecting hole 117 is formed on the upper base plate 110, and the locking screw 510 passes through the first connecting hole 221 and is connected with the second connecting hole 117, so as to lock the trough frame 220 on the upper base plate 110. It will be appreciated that this arrangement does not increase the structure of the trough assembly 200, facilitates assembly and manufacture of the trough assembly 200, and facilitates a reduction in the manufacturing cost of the trough assembly 200. Specifically, the chute frame 220 is provided with a lug, and the first connecting hole 221 is formed on the lug, wherein a user can take the chute assembly 200 through the lug, so that the user can operate the chute assembly conveniently.

Further, the second connecting hole 117 extends from the side of the mounting groove 112 away from the light hole 111 into the mounting groove 112, which is beneficial to reducing the distance between the second connecting hole 117 and the mounting groove 112, thereby meeting the design requirements of compact structure and small volume of the upper base plate 110, and reducing the overall volume of the three-dimensional forming device.

The two second connection holes 117 are distributed along the length direction of the upper base plate 110, and the length direction of the upper base plate 110 is shown by arrow X in fig. 1 and 2, so that the trough assembly 200 can be reliably and firmly locked on the upper base plate 110 by the two locking screws 510, the possibility of shaking, moving and tilting the trough assembly 200 is reduced, good and uniform tightness of the release film 210 is ensured, and the printing quality is improved.

As shown in fig. 5 and 6, in some possible embodiments provided by the present utility model, the locking mechanism 500 includes a catch 520 provided on the trough frame 220, and a catch 530 provided on the upper base plate 110, the catch 520 cooperating with the catch 530 to lock the trough frame 220 to the upper base plate 110. It will be appreciated that this arrangement does not increase the structure of the trough assembly 200, facilitates assembly and manufacture of the trough assembly 200, and facilitates a reduction in the manufacturing cost of the trough assembly 200.

Wherein, two buckles 530 are disposed on two sides of the mounting groove 112 along the length direction of the upper base plate 110, wherein, the length direction of the upper base plate 110 is shown by arrow X in fig. 5 and 6, therefore, by matching the two sets of buckles 530 and the clamping groove 520, the trough assembly 200 can be reliably and firmly locked on the upper base plate 110, the possibility of shaking, moving and tilting the trough assembly 200 is reduced, the good and uniform tension of the release film 210 is ensured, and the printing quality is improved.

It will be appreciated that when the locking mechanism 500 includes a mortise and tenon mechanism, the mortise and tenon mechanism includes a tenon and a mortise, one of the tenon and the mortise is disposed on the chute frame 220, and the other is disposed on the upper base plate 110, and the chute assembly 200 can be locked on the upper base plate 110 by the cooperation of the tenon and the mortise.

As shown in fig. 3 and 4, in some possible embodiments provided by the present utility model, the bottom surface of the trough frame 220 is positioned within the mounting trough 112, and the top surface of the boss 113 is higher than the bottom surface of the trough frame 220. Thereby, a height difference between the top surface of the protrusion 113 and the bottom surface of the chute frame 220 can be ensured, so that the protrusion 113 can jack up the separation type film 210 to tension the separation type film 210.

As shown in fig. 4, in the above-described embodiment, the distance between the top surface of the convex portion 113 and the bottom surface of the mounting groove 112 is 0.3mm to 1mm. Wherein, the distance between the top surface of the protrusion 113 and the bottom surface of the mounting groove 112 may be as shown as h in fig. 4. Specifically, the distance h between the top surface of the protrusion 113 and the bottom surface of the mounting groove 112 may be 0.3mm, 0.5mm, 0.7mm, 0.9mm, 1mm, or other values. Through the distance between the top surface of reasonable setting convex part 113 and the bottom surface of mounting groove 112, can ensure that trough assembly 200 connects behind upper plate 110, convex part 113 can be with from the jack-up reasonable height of type membrane 210 to ensure to leave the rate of tension of type membrane 210 in reasonable within range, and then ensure good printing effect, and reduce the damage to type membrane 210, improve the life from type membrane 210.

As shown in fig. 1 and fig. 5, in an example provided by the present utility model, the protruding portion 113 is in an annular structure, that is, the protruding portion 113 is distributed along the entire circumference of the mounting groove 112, for example, the protruding portion 113 is an annular boss, so that the release film 210 can be lifted up from the entire circumference of the trough frame 220 by using the protruding portion 113 with an annular structure, so that the uniformity of stress of the release film 210 is improved, the deformability of the release film 210 in all directions in the circumferential direction is relatively uniform, the uniformity of the adsorption force of the print model and the release film 210 is improved, the situation that part of the print model and the release film 210 are difficult to separate due to inconsistent deformation force of the release film 210 in the circumferential direction is reduced, and the reliability and the smoothness of the separation of the print model and the release film 210 are improved, so that the print quality is improved.

In another example provided by the utility model (not shown in the figure), the convex portions 113 are a plurality of convex blocks distributed at intervals along the circumferential direction of the mounting groove 112, and the release film 210 can be lifted up from the circumferential direction of the trough frame 220 by using the plurality of convex blocks, and under the action of the integrity and extensibility of the release film 210, the release film 210 can be lifted up along the circumferential side of the trough frame 220, so that the uniformity of stress of the release film 210 is improved, the deformability of the release film 210 in each circumferential direction is more uniform, the uniformity of the adsorption force of the printing model and the release film 210 is improved, the situation that part of the printing model and the release film 210 are difficult to separate due to inconsistent deformability of the release film 210 in the circumferential direction is reduced, and the reliability and the smoothness of the separation of the printing model and the release film 210 are improved, and the printing quality is improved. At the same time, this arrangement is advantageous in reducing the material consumption of the protruding portion 113, and saving the manufacturing cost of the upper base plate 110.

As shown in fig. 1 and 5, in some possible embodiments of the present utility model, a first limiting portion 114 is disposed at a bottom of the mounting slot 112, a second limiting portion is disposed at a bottom surface of the slot frame 220, and the first limiting portion 114 and the second limiting portion cooperate to limit movement of the slot frame 220 relative to the upper base plate 110. Therefore, the first limiting part 114 and the second limiting part are matched to play a role in pre-positioning and limiting, so that the assembly efficiency and the assembly precision of the trough frame 220 and the mounting groove 112 can be improved; at the same time, movement of the trough frame 220 relative to the mounting trough 112 in the horizontal direction is reduced, i.e., the likelihood of the trough frame 220 sloshing is reduced; meanwhile, since the first limiting part 114 is located at the bottom of the installation groove 112 and the second limiting part is located at the bottom of the trough frame 220, the trough assembly 200 is connected to the rear of the upper base plate 110, and the first limiting part 114 and the second limiting part are not exposed to the outside, so that the appearance aesthetic property of the stereoscopic forming device is improved.

In the above embodiment, one of the first stopper 114 and the second stopper is a groove structure, and the other is a protrusion structure. Specifically, the first limiting part 114 is of a groove structure, the second limiting part is of a protruding structure, or the first limiting part 114 is of a protruding structure, the second limiting part is of a groove structure, and the protruding structure and the groove structure are convenient to process, easy to realize, good in limiting effect and suitable for popularization and application.

As shown in fig. 1 and 5, in some possible embodiments of the present utility model, the upper base plate 110 is provided with a third limiting portion 115, at least a side wall of the mounting slot 112 is connected to the third limiting portion 115, and a side surface of the trough frame 220 is provided with a fourth limiting portion, where the third limiting portion 115 and the fourth limiting portion cooperate to limit movement of the trough frame 220 relative to the upper base plate 110. Therefore, the third limiting part 115 and the fourth limiting part are matched to play a role in pre-positioning and limiting, so that the assembly efficiency and the assembly precision of the trough frame 220 and the mounting groove 112 can be improved, meanwhile, the trough frame 220 is prevented from moving relative to the mounting groove 112, and the possibility of shaking of the trough frame 220 relative to the upper base plate 110 is reduced.

In the above embodiment, the third limiting portion 115 is a slot, the fourth limiting portion is an insert, and the opening direction of the slot is perpendicular to the opening direction of the mounting groove 112, and since the third limiting portion 115 is connected to the side wall of the mounting groove 112, that is, the slot is connected to the side wall of the mounting groove 112, after the insert on the trough frame 220 is inserted into the slot, the trough frame 220 can be limited to move in the vertical direction and the horizontal direction relative to the upper base plate 110, which plays a role in pre-positioning and limiting, and can improve the assembly efficiency and the assembly precision of the trough frame 220 and the mounting groove 112, and meanwhile, the possibility of shaking the trough frame 220 relative to the upper base plate 110 is reduced.

As shown in fig. 1 to 6, in some possible embodiments provided by the present utility model, the stereolithography apparatus further includes: a support body 100 and a vertical movement mechanism 300, the support body 100 including an upper base plate 110, the vertical movement mechanism 300 being connected to the support body 100; the third limiting portion 115 is connected to a side wall of the mounting groove 112 on a side close to the vertical movement mechanism 300.

In this embodiment, the third limiting portion 115 is connected to the side wall of the installation groove 112 near the side of the vertical movement mechanism 300, so that when the trough assembly 200 is connected to the upper base plate 110, the trough can shield the third limiting portion 115, thereby preventing the third limiting portion 115 from being exposed to the user, and improving the aesthetic appearance of the stereoscopic forming apparatus.

Further, as shown in fig. 7, the stereolithography apparatus further includes a lithography stage 700, and the vertical movement mechanism 300 is connected to the lithography stage 700 to drive the lithography stage 700 to move in a direction approaching or moving away from the upper plate 110.

As shown in fig. 1 and 5, the stereolithography apparatus further includes a screen assembly 400, the screen assembly 400 being positioned in the light transmission hole 111, and the stereolithography apparatus further includes a light source assembly 800 positioned at an inner wall of the support body 100. Therefore, the relative positions of the molding platform 700 and the trough are adjusted through the vertical movement mechanism 300, so that the molding platform 700 is positioned at a proper position of the trough, at this time, the light projected by the light source assembly 800 of the three-dimensional molding device is radiated to the surface of the photo-curing material in the trough through the screen assembly 400, and the photo-curing material can be cured on the molding platform 700, so that the printing of the three-dimensional entity of one printing layer can be realized. Then, the molding platform 700 is moved away from the trough by a distance equal to the thickness of one printing layer, and then another printing layer is solidified, and so on, so as to realize the printing of the three-dimensional model.

As shown in fig. 4, in some possible embodiments of the present utility model, the inner wall of the light hole 111 is provided with a mounting boss 116, and the screen assembly 400 is connected to the upper chassis 110 through the mounting boss 116. Thus, the screen assembly 400 can be reliably mounted on the upper chassis 110 using the mounting boss 116.

It will be appreciated that since the printed pattern of the stereolithography apparatus is cured layer by layer, whether the first layer of the pattern is successfully adhered to the molding platform 700 is important for the subsequent printing process, such as uneven curing of the first layer pattern, incomplete curing of the partial areas, and during the printing process of the pattern, the first layer pattern will fracture as the pattern becomes heavier, resulting in the pattern falling off. For this reason, in order to ensure stable adhesion between the mold and the molding platform 700, a leveling method is generally adopted to adjust the molding platform 700 to be parallel to the release film 210, and then the molding platform is fixed, and printing is performed, for example, a leveling screw is rotated to tightly press a fixing block on the molding platform 700, so as to adjust the adhesion degree between the molding platform 700 and the exposure screen. In this way, an additional leveling process of the molding platform 700 is required before printing, and the leveling process involves a complicated process of loosening the molding platform 700, adjusting the angle of the molding platform 700, and fixing the molding platform 700, resulting in an additional workload.

Further, the stereolithography apparatus further comprises a screen adjustment assembly 400', the screen adjustment assembly 400' comprising a floating platform 410', the floating platform 410' being located at the light transmission hole 111 and being movable relative to the upper base plate 110; the corner of the floating platform 410' is provided with a first mating portion 411', and the first mating portion 411' has an arc surface structure.

In this embodiment, as shown in fig. 7, 12 and 15, the screen assembly 400 of the present utility model may be replaced by a screen adjusting assembly 400', where the screen adjusting assembly 400' includes a floating platform 410', it is understood that the floating platform 410' includes an exposure screen, the floating platform 410 'is located at the light hole 111 below the trough assembly 200 and is movable relative to the upper base plate 110, and the relative position of the floating platform 410' and the upper base plate 110 includes an initial position; an elastic member 600 coupled to the floating platform 410 'and the upper base plate 110, the elastic member 600 being configured to apply a force to the floating platform 410' close to the trough assembly 200 so as to move the floating platform 410 'to an initial position or to adjust an inclination angle or height of the floating platform 410' with respect to the upper base plate 110; wherein, one or more corners of the floating platform 410' are provided with a first matching part 411', and the first matching part 411' has a cambered surface structure; the side wall of the light hole 111 is provided with a second matching portion 118 opposite to the first matching portion 411', and the first matching portion 411' and the second matching portion 118 are arc-shaped surfaces matched with each other in a surface mode, so that the floating platform 410 'and the upper base plate 110 are in butt joint through the first matching portion 411' and the second matching portion 118 and move relative to each other.

Further, the screen adjusting assembly 400' further includes a limiting block 420', the two second matching portions 118 are provided with accommodating grooves 1181, the limiting block 420' is located in the accommodating grooves 1181, and the limiting block 420' is used for limiting the movement of the floating platform 410' along the horizontal direction; the screen adjustment assembly 400 'further includes an upper limit tab 430', the upper limit tab 430 'being coupled to the floating platform 410', the upper limit tab 430 'interacting with the upper base plate 110 to limit the uppermost position of the floating platform 410' to an initial position in cooperation with the elastic member 600; the screen adjustment assembly 400 'further includes a lower limit plate 440', the lower limit plate 440 'being connected to the floating platform 410' and the upper chassis 110, respectively, the lower limit plate 440 'being elastically deformed in a direction perpendicular to the floating platform 410' to apply a force to move the floating platform 410 'to a restoring direction of the lower limit plate 440', the lower limit plate 440 'being rigid in a direction parallel to the floating platform 410' to limit a relative position of the floating platform 410 'and the upper chassis 110 in a direction parallel to the floating platform 410'.

As shown in fig. 7 to 17, in this embodiment, the floating platform 410' of the screen adjusting assembly 400' is located at the light transmission hole 111 below the trough assembly 200, so that the light emitted from the light source assembly 800 is radiated to the photo-curing resin in the trough assembly 200 through the exposure screen of the screen adjusting assembly 400', and the photo-curing resin can be cured on the molding platform 700.

Wherein the floating platform 410' is movable relative to the upper base plate 110, the relative position of the floating platform 410' and the upper base plate 110 includes an initial position, specifically, the floating platform 410' is movable relative to the upper base plate 110 under the action of external force, the inclination angle of the screen adjusting assembly 400' can be changed, and when the external force is removed, the floating platform 410' returns to the initial position under the action of the elastic member 600.

It will be appreciated that during installation of the molding platform 700, the bottom surface of the molding platform 700 will be non-parallel to the upper surface of the screen adjustment assembly 400' due to installation or mechanical errors, and the bottom surface of the molding platform 700 will be inclined, and the phenomenon of one side being high and the other side being low will occur, specifically, the description will be given taking the example that the left edge of the bottom surface of the molding platform 700 is high and the right edge is low. In printing, the trough assembly 200 is connected to the upper base plate 110 and is positioned above the screen adjusting assembly 400', and the release film 210 of the trough assembly 200 is attached to the surface of the screen adjusting assembly 400'.

Before curing starts, the forming platform 700 descends, the right edge of the forming platform 700 firstly acts on the release film 210, the right side of the floating platform 410' is stressed by the right edge of the forming platform 700 due to the fact that the release film 210 is a flexible piece, the right side of the floating platform 410' moves downwards from an initial position, the inclination angle of the floating platform 410' is gradually matched with the bottom surface of the forming platform 700 under the action of the elastic piece 600 along with the continuous downward movement of the forming platform 700, and finally, the left edge of the forming platform 700 acts on the left side of the floating platform 410', and the floating platform 410' is indirectly in surface fit with the forming platform 700. This process corresponds to the movement of the build platform 700 to the zero position and does not involve an additional manual or automatic leveling process, after which the build platform 700 is raised to the level of a model to begin printing. During the lifting of the molding platform 700, the floating platform 410' will move toward the initial position under the action of the elastic member 600, until the left side of the floating platform 410' reaches the height of the initial position, the left edge of the molding platform 700 will be separated from the left side of the floating platform 410', while the right side of the floating platform 410' is still in a state of being pressed by the right edge of the molding platform 700, at this time, a gap will be generated between the floating platform 410' and the bottom surface of the molding platform 700, the resin in the gap will be cured, the thickness of the layer of cured resin will be reduced from left to right, but due to the very small gap when generated, the complete curing of the resin can be satisfied even at the left edge of the molding platform 700 with the maximum gap thickness. During the printing of each subsequent layer of the pattern, a gap is created between the shaped pattern and floating platform 410', and curing of the resin occurs in the gap until the right edge of shaping platform 700 is clear of floating platform 410', at which point floating platform 410' returns fully to its original position. In the process from the beginning of printing to the complete return of the floating platform 410 'to the initial position, the printing of the previous several layers of models is completed, each layer of models is wedge-shaped, which is equivalent to the model which is formed between the inclined forming platform 700 and the floating platform 410' in the initial state at one time, and the models are divided into multiple layers of models to be sequentially cured, so that the thickness of each layer of models can meet the thickest position and can be completely cured, the problem that the thicker side of the model formed at one time cannot be cured due to the fact that the thicker side of the model is provided with the area far away from the light source is avoided, and the additional complex leveling process is not required.

As shown in fig. 12, 13, 14, 15 and 16, the floating platform 410' is rectangular, the four corners of the floating platform 410' are provided with first matching portions 411', the side wall of the light hole 111 is provided with second matching portions 118 opposite to the first matching portions 411', and the first matching portions 411' and the second matching portions 118 are arc-shaped surfaces with surface-type mutual matching, so that the floating platform 410' and the upper base plate 110 are in butt joint through the first matching portions 411' and the second matching portions 118 and mutually move. Because the first matching portion 411' and the second matching portion 118 are the arc surfaces of the surface type matching with each other, if the first matching portion 411' is of an arc surface structure, the second matching portion 118 is of an arc surface structure, and the two arc surface structures are matched with each other, so that the floating platform 410' and the upper base plate 110 can be prevented from being blocked, good leveling effect can be ensured, and leveling smoothness can be improved. Wherein, when the shaping platform 700 presses down the floating platform 410 as a whole, the stress condition of the floating platform 410 is as shown in fig. 13.

Specifically, as shown in fig. 8 to 10, the four first fitting parts 411' include first sub-fitting parts 411a ' and second sub-fitting parts 411b ' which are spaced apart in the length direction of the upper chassis 110, and as shown in fig. 8, when the top ends of the first sub-fitting parts 411a ' and the second sub-fitting parts 411b ' are all flush with the upper chassis 110, the horizontal distance between the first sub-fitting parts 411a ' and the second sub-fitting parts 411b ' is d1; as shown in fig. 9, when the tip of the first sub-fitting portion 411a 'is higher than the upper chassis 110 and the tip of the second sub-fitting portion 411b' is lower than the upper chassis 110, the horizontal distance between the first sub-fitting portion 411a 'and the second sub-fitting portion 411b' is d2; as shown in fig. 10, when the tip of the first sub-fitting portion 411a 'is lower than the upper chassis 110 and the tip of the second sub-fitting portion 411b' is higher than the upper chassis 110, the horizontal distance between the first sub-fitting portion 411a 'and the second sub-fitting portion 411b' is d3; since the opening size of the light hole 111 along the length direction of the upper plate 110 is unchanged, d1=d2=d3, there is no interference to be blocked when the floating platform 410' provided with the circular arc surface floats up and down from left to right, which is advantageous for improving the sensitivity and accuracy of the leveling operation.

Wherein, as shown in fig. 12 and 15, the side walls of the light transmission holes 111 are provided with mounting bosses 116, and the elastic members 600 are positioned between the mounting bosses 116 and the floating platform 410' to apply a force to the floating platform 410' near the trough assembly 200 and to bring the floating platform 410' to an initial position.

As shown in fig. 12 and 15, the screen adjusting assembly 400' further includes a limiting block 420', the second matching portion 118 is provided with a receiving groove 1181, the limiting block 420' is located in the receiving groove 1181, and the limiting block 420' is used for limiting the movement of the floating platform 410' along the horizontal direction; specifically, the stopper 420' can reduce the gap between the floating platform 410' and the light hole 111 to reduce the floating amplitude of the floating platform 410' to ensure a good leveling effect. It is to be understood that the portion of the limiting block 420' opposite to the first mating portion 411' may be configured as a planar structure, or may be configured as an arc surface structure, and the number of the limiting blocks 420' may be two, three, or four. Specifically, the screen adjusting assembly 400 'further includes a first coupling bolt 450', and the stopper 420 'is fixed to the upper chassis 110 by the first coupling bolt 450'.

As shown in fig. 15 and 16, the screen adjusting assembly 400 'further includes an upper limit tab 430', the upper limit tab 430 'being connected to the floating platform 410', the upper limit tab 430 'interacting with the upper base plate 110 to limit the uppermost position of the floating platform 410' to the initial position in cooperation with the elastic member 600. Thus, a high degree of accuracy can be ensured when floating platform 410' is in the initial position. The number of the upper limit pieces 430' is four, and the four upper limit pieces 430' are distributed at four corners of the floating platform 410', so that the height of the four corners of the floating platform 410' is limited, the problem that the initial position of the floating platform 410' is inaccurate due to the fact that any corner of the floating platform 410' protrudes is avoided, and the accuracy of the height of the floating platform 410' in the initial position is further ensured.

It is understood that the upper limit tab 430' may be fixed to the upper base plate 110 by screws, and as shown in fig. 15 and 16, when the screen assembly 400 includes both the upper limit tab 430' and the limit block 420', the upper limit tab 430' may be located above the limit block 420 '. As shown in fig. 12 and 13, when the screen assembly 400 includes only the stopper 420 'without the upper stopper 430', the stopper 420 'may function as a gap, and may function as a height limiter to limit the highest position of the floating platform 410' to the initial position in cooperation with the elastic member 600.

As shown in fig. 12 and 15, the screen adjusting assembly 400 'further includes a lower limit plate 440', the lower limit plate 440 'being connected to the floating platform 410' and the upper base plate 110, respectively, the lower limit plate 440 'being elastically deformed in a direction perpendicular to the floating platform 410' to apply a force to move the floating platform 410 'to a restoring direction of the lower limit plate 440', the lower limit plate 440 'being rigid in a direction parallel to the floating platform 410' to limit a relative position of the floating platform 410 'and the upper base plate 110 in a direction parallel to the floating platform 410'.

Wherein, the lower limiting piece 440' has elasticity, the lower limiting piece 440' is deformed only in the direction in which the floating platform 410' moves up and down, so that the floating platform 410' can change the inclination angle, and an external force for moving the floating platform 410' upwards is applied to the floating platform 410' in the process of restoring the lower limiting piece 440 '. Meanwhile, the lower limit plate 440 'has rigidity in a direction perpendicular to the movement direction of the floating platform 410', and the floating platform 410 'cannot move in a horizontal direction, thereby preventing the floating platform 410' from shaking left and right. The lower limit plate 440' may be a metal plate, such as a spring steel plate, and the lower limit plate 440' has a plate-like structure and is parallel to the floating platform 410 '. The number of the lower limit pieces 440' may be four, and the four lower limit pieces 440' are respectively disposed at four corners of the floating platform 410', so as to enhance the acting force from the four corners of the floating platform 410', thereby avoiding the problem of insufficient force application strength of the single lower limit piece 440', and enabling the floating platform 410' to be in an initial position under the action of the four lower limit pieces 440 '.

Specifically, as shown in fig. 15, the lower limit plate 440' may have a plate structure with a bent structure, or, as shown in fig. 12, the lower limit plate 440' may include a flat plate 442' and a spring plate 441', and the spring plate 441' and the flat plate 442' cooperate with each other to realize the function of the lower limit plate 440'.

Specifically, the screen adjusting assembly 400 'further includes a second connection bolt 460', and the lower limit plate 440 'is connected to the upper chassis 110 by the second connection bolt 460'.

It is understood that, regarding the elastic member 600 and the lower limit tab 440', only one may be provided, for example, the screen adjustment assembly 400' may include only the elastic member 600, or the screen adjustment assembly 400 'may include only the lower limit tab 440', or the screen adjustment assembly 400 'may include both the elastic member 600 and the lower limit tab 440'.

In some embodiments, profiled platform 700 may also be leveled by: the three-dimensional forming device further comprises a position detection device 900 and a control device, in the leveling process, the forming platform 700 is controlled to move towards the direction close to the trough assembly 200, when the forming platform 700 reaches the bottom of the trough assembly 200, the position detection device 900 sends a leveling signal, the control device controls the forming platform 700 to move continuously towards the direction close to the trough assembly 200 for a first preset distance according to the leveling signal, so that the forming platform 700 can reliably press down the floating platform 410', the floating platform 410' is subjected to downward pressure displacement, and as shown in fig. 13, four elastic pieces 600 are respectively subjected to forces with different magnitudes and generate reaction forces with different magnitudes to support the floating platform 410', and the floating platform 410' is attached to the forming platform 700, so that leveling-free is achieved. The process can eliminate the influence of the mechanical assembly error structure of the equipment on the leveling result, reduce the gap between the forming platform 700 and the bottom of the trough assembly 200 in practice, ensure the close fitting of the forming platform 700 and the release film 210 at the bottom of the trough assembly 200, ensure that the forming platform 700, the trough assembly 200 or the exposure screen of the printer maintain a parallel state as much as possible, ensure that the printing material in the gap can be completely solidified and adhered to the bottom of the forming platform 700, and facilitate the separation from the trough. In addition, if the forming platform 700 is detected to reach the bottom of the trough, the forming platform 700 is controlled to continuously move a first preset distance towards the direction close to the trough assembly 200, so that the forming platform 700 and the bottom of the trough assembly 200 can be well guaranteed to be flatly attached, and when a small amount of detection errors exist in the detection of the forming platform 700 reaching the bottom of the trough, the detection errors can be compensated, and therefore the leveling effect is guaranteed.

Specifically, when the modeling platform 700 moves to the bottom of the trough assembly 200, the position detection device 900 sends a leveling signal, and the control device records the position of the modeling platform 700 as the origin position Z0, and the distance h1 from the modeling platform 700 to the floating platform 410'. Then, the control device drives the forming platform 700 to move downwards through the vertical movement mechanism 300 to press the floating platform 410', the floating platform 410' moves downwards by a distance h2, the position Z1 of the forming platform 700 is recorded, and Z1 = h1+ h2 is recorded, wherein the difference between h1 and h2 is in the range of 0.5mm to 2mm, and the error gap caused by the assembly of the forming platform 700 and the trough assembly 200 is not more than 0.4mm under normal conditions, so that the difference between h1 and h2 is limited to be in the range of 0.5mm to 2mm, the phenomenon that the solidified printing material cannot be firmly adhered on the forming platform 700 due to overlarge gap caused by unevenness between the forming platform 700 and the trough can be avoided, and the printing effect of the model and the printing success rate of the model can be improved.

In some possible embodiments provided by the present utility model, as shown in fig. 18, 19 and 20, the position detecting device 900 may be a photoelectric detection assembly, for example, the position detecting device 900 includes a sensing element 910 and a photoelectric switch 920, where the sensing element 910 and the photoelectric switch 920 cooperate to sense the distance between the molding platform 700 and the trough assembly 200 to send a leveling signal. Specifically, one of the sensing member 910 and the photoelectric switch 920 is disposed on the molding stage 700, and the other is disposed on the support body 100; if the other is disposed on the Z-axis bracket 120 of the support body 100, when the vertical movement mechanism 300 drives the molding platform 700 to reach the bottom of the trough and indirectly contact with the floating platform 410' at the initial position, the signal state of the sensing member 910 or the photoelectric switch 920 is changed to send a leveling signal.

Specifically, as shown in fig. 18, the sensing member 910 may be a sensing piece, the sensing piece is disposed on the molding platform 700, the photoelectric switch 920 is disposed on the Z-axis bracket 120 of the supporting body 100, and when the molding platform 700 moves to the bottom of the trough assembly 200, the sensing member 910 is opposite to the photoelectric switch 920, so that an optical signal sent by the photoelectric switch 920 can be sensed to send out a leveling signal.

Alternatively, as shown in fig. 19 and 20, the sensing member 910 may be a stopper on the molding stage 700, and the photoelectric switch 920 includes a light emitter and a light receiver, and normally, the light receiver of the photoelectric switch 920 can receive light emitted from the light emitter, and when the molding stage 700 moves to the bottom of the trough assembly 200, the stopper is located between the light emitter and the light receiver, preventing the light receiver from receiving light signals, so that the signal state of the photoelectric switch 920 is changed to emit a leveling signal.

In other possible embodiments of the present utility model, the position detecting device 900 may be a push switch, specifically, the push switch is disposed on the support body 100, and the forming platform 700 is provided with a stop, which may be shown as a sensing member 910 in fig. 19 and 10. When the molding platform 700 moves to the bottom of the trough assembly 200, the stop triggers the push switch to send a leveling signal.

Further, as shown in fig. 21, the push switch includes a housing 930, a push switch body 940, and a first locking member 950. The push switch body 940 is configured to send a leveling signal when an external force is applied, i.e., when a stopper on the molding platform 700 touches the push switch body 940, the push switch body 940 sends the leveling signal.

Specifically, during leveling, the housing 930 is fixed on the supporting body 100, the first locking member 950 is adjusted to an unlocking position, the push switch body 940 can move up and down in the housing 930, after the side of the push switch body 940, which is used for contacting the molding platform 700, is adjusted to a proper position by moving the push switch body 940, the first locking member 950 is adjusted to a locking position, and the top end of the push switch body 940 is fixed at a proper position, so that after the molding platform 700 moves to the bottom of the trough assembly 200, a stop block on the molding platform 700 touches the push switch body 940, and the push switch body 940 transmits a leveling signal.

As shown in fig. 22 and 23, the push switch main body 940 includes an inner housing 941, a movable member 942, a first conductive portion 943, a second conductive portion 944, a third conductive portion 945, and an elastic restoring member 946, where a sliding slot is disposed on the inner housing 941, and the movable member 942 is located in the sliding slot to move along the sliding slot relative to the inner housing 941 when receiving external pushing force. The first locking member 950 is connected with the inner shell 941, the first conductive portion 943 is connected with the inner shell 941, the second conductive portion 944 is connected with the movable member 942, the movable member 942 moves relative to the inner shell 941 to at least include a first electrical position and a second electrical position, and when the movable member 942 moves to the first electrical position, the second conductive portion 944 is electrically connected with the first conductive portion 943; when the movable member 942 moves to the second electrical position, the second conductive portion 944 is electrically disconnected from the first conductive portion 943. The third conductive portion 945 is connected to the first conductive portion 943 and the second conductive portion 944, and is used to connect to an external power source, and supplies power to the first conductive portion 943 and the second conductive portion 944. The elastic restoring member 946 is located between the bottom of the chute and the movable member 942, and the elastic restoring member 946 is configured to apply a force to the movable member 942 to move the movable member 942 from the second electrical position to the first electrical position.

As shown in fig. 22, the push switch main body 940 further includes four guide posts 947, a first guide groove matching with the profile of the guide post 947 is provided on the side wall of the chute, a second guide groove matching with the profile of the guide post 947 is provided on the movable member 942, a gap is provided between the outer wall of the movable member 942 and the inner wall of the chute, the movable member 942 is matched with the first guide groove through the second guide groove, and the guide posts 947 are abutted by different sliding sides of the guide posts 947 so that the movable member 942 slides along the guide posts 947.

As shown in fig. 22, a heat-resistant pad 948 is disposed at the top end of the movable member 942, and the heat-resistant pad 948 plays a role of heat insulation, which is beneficial to prolonging the service life of the movable member 942. It is understood that the top surface of the heat block 948 is understood to be the moveable member 942, and that the top surface of the heat block 948 is coplanar with the bottom of the trough assembly 200.

In this embodiment, in use, the movable member 942 is in the first electrical position, and a voltage is applied to the first conductive portion 943 and the second conductive portion 944, respectively, and the first conductive portion 943 and the second conductive portion 944 are electrically connected. When the forming platform 700 moves towards the direction approaching the trough assembly 200, the stop block on the forming platform 700 pushes the movable member 942, when the movable member 942 moves, the second conductive portion 944 is driven to separate from the first conductive portion 943, the movable member 942 is at the second electrical position, the first conductive portion 943 and the second conductive portion 944 are electrically disconnected, the electrical change generates a leveling signal, and the control device controls the forming platform 700 to continuously move towards the direction approaching the trough assembly 200 for a first preset distance according to the leveling signal, so as to press the floating platform 410' down, thereby realizing autonomous leveling.

Further, as shown in fig. 22, the push switch body 940 also includes a second lock 949. The second locking member 949 is adapted to couple with the inner housing 941 and the moveable member 942 to fix or loosen the relative positions of the inner housing 941 and the moveable member 942. Specifically, the second locking member 949 serves to secure the moveable member 942 in the first electrical position such that the inner housing 941 and the moveable member 942 are moveable as a unit relative to the outer housing 930.

As shown in fig. 7, in some possible embodiments of the present utility model, the floating platform 410' includes a screen and a floating plate surrounding a peripheral side of the screen, wherein a lateral length of the molding platform 700 is greater than a lateral length of the screen, a longitudinal length of the molding platform 700 is greater than a longitudinal length of the screen, a lateral direction of the molding platform 700 may be shown by an arrow X in fig. 7, a longitudinal direction of the molding platform 700 may be shown by an arrow Y in fig. 7, (or a lateral direction of the molding platform 700 may be shown by an arrow Y in fig. 7, and a longitudinal direction of the molding platform 700 may be shown by an arrow X in fig. 7). By the arrangement, the forming platform 700 can directly apply force on the floating plate in the process of gradually moving close to the screen adjusting assembly 400', so that the screen is prevented from being subjected to transitional pressure bearing, the service life of the screen is prolonged, and the reliability of the floating platform 410' is improved.

As shown in fig. 20, in some possible embodiments of the present utility model, the vertical movement mechanism 300 includes a driving part 310 and a transmission part 320, and the driving part 310 is connected to the molding platform 700 through the transmission part 320 to drive the molding platform 700 to approach the screen assembly 400 or to be away from the screen assembly 400 in a vertical direction. The transmission part 320 may be a nut screw mechanism, a sliding table mechanism or other transmission mechanisms, and the driving part 310 may be electrically driven, hydraulically driven, pneumatically driven or the like. Specifically, the driving part 310 may be a motor, and the driving part 310 is installed inside the support body 100, and the stereoscopic forming apparatus further includes a main control board located inside the support body 100. The side at the motor still is provided with bending plate 330, bending plate 330 is including the first board and the second board that slope or perpendicular set up (having the contained angle between first board and the second board promptly, and the contained angle size can set up according to actual demand), and wherein, first board is close to the motor side setting for the winding displacement of fixed screen subassembly 400, and the second board is close to the motor bottom surface setting for shelter from motor piece and engine oil, interference free main control board has played good guard action, is favorable to prolonging three-dimensional former's life. In particular, the first and second ones of the bending plates 330 may be disposed approximately vertically.

As shown in fig. 1 to 6, the present utility model provides a stereolithography apparatus comprising: an upper base plate 110, wherein a light hole 111 and a convex portion 113 positioned on the periphery of the light hole 111 are formed on the upper base plate 110; the trough assembly 200 comprises a release film 210 and a trough frame 220 with two open ends, wherein the release film 210 is connected with the trough frame 220 to seal the bottom opening of the trough frame 220; wherein, the trough frame 220 is mounted on the upper base plate 110, the upper surface of the convex portion 113 is higher than the mounting bottom surface of the trough frame 220, and the convex portion 113 supports the release film 210 to tighten the release film 210.

Further, an installation groove 112 is formed in the upper base plate, the installation groove is located on the periphery side of the light hole 111, and a convex portion 113 is formed between the installation groove 112 and the light hole 111.

Further, the stereolithography apparatus further includes: a locking mechanism 500, the locking mechanism 500 being mounted at least on the upper base plate 110, the locking mechanism 500 being used to lock the trough assembly 200 to the upper base plate 110;

the locking mechanism 500 comprises a locking screw 510, a first connecting hole 221 is formed in the trough frame 220, a second connecting hole 117 is formed in the upper base plate 110, and the locking screw 510 penetrates through the first connecting hole 221 and is connected with the second connecting hole 117 so as to lock the trough frame 220 on the upper base plate 110; wherein, the second connecting hole 117 extends into the mounting groove 112 from one side of the mounting groove 112 away from the light transmitting hole 111; two second connection holes 117 are distributed along the length direction of the upper base plate 110; or alternatively, the first and second heat exchangers may be,

The locking mechanism 500 comprises a clamping groove 520 arranged on the trough frame 220 and a buckle 530 arranged on the upper base plate 110, wherein the clamping groove 520 is matched with the buckle 530 to lock the trough frame 220 on the upper base plate 110; wherein, two buckles 530 are disposed at both sides of the mounting groove 112 along the length direction of the upper base plate 110.

Further, the bottom surface of the trough frame 220 is positioned in the mounting groove 112, and the top surface of the convex portion 113 is higher than the bottom surface of the trough frame 220; wherein the distance between the top surface of the protrusion 113 and the bottom surface of the installation groove 112 is 0.3mm to 1mm; the protruding portion 113 has an annular structure, or the protruding portion 113 is a plurality of protruding portions distributed at intervals along the circumferential side of the mounting groove 112.

Further, a first limiting part 114 is arranged at the bottom of the mounting groove 112, a second limiting part is arranged at the bottom surface of the groove frame 220, and the first limiting part 114 and the second limiting part are matched and used for limiting the movement of the groove frame 220 relative to the upper base plate 110; one of the first limiting portion 114 and the second limiting portion is of a groove structure, and the other is of a protrusion structure.

Further, the upper base plate 110 is provided with a third limiting portion 115, at least one side wall of the mounting groove 112 is connected with the third limiting portion 115, a fourth limiting portion is arranged on the side surface of the trough frame 220, and the third limiting portion 115 and the fourth limiting portion are matched to limit the movement of the trough frame 220 relative to the upper base plate 110; the third limiting part 115 is a slot, the fourth limiting part is an inserting block, and the opening direction of the slot is perpendicular to the opening direction of the mounting groove 112; the two slots are distributed on the same side of the mounting slot 112 along the length of the upper plate 110.

Further, the stereolithography apparatus further includes: a support body 100 and a vertical movement mechanism 300, the support body 100 including an upper base plate 110, the vertical movement mechanism 300 being connected to the support body 100; the third limiting portion 115 is connected to a side wall of the mounting groove 112 on a side close to the vertical movement mechanism 300.

Further, the stereolithography apparatus further comprises a screen adjustment assembly 400', the screen adjustment assembly 400' comprising a floating platform 410', the floating platform 410' being located at the light transmission hole 111, movable relative to the upper base plate 110; the corner of the floating platform 410' is provided with a first mating portion 411', and the first mating portion 411' has an arc surface structure.

Further, the stereoscopic molding apparatus further comprises a molding platform 700 and a screen assembly 400, wherein the molding platform 700 and the vertical movement mechanism 300; the inner wall of the light hole 111 is provided with a mounting boss 116, and the screen assembly 400 is connected with the upper base plate 110 through the mounting boss 116; the screen assembly 400 includes a screen and a floating plate disposed at a peripheral side of the screen, and the lateral length of the molding stage 700 is greater than that of the screen, and/or the longitudinal length of the molding stage 700 is greater than that of the screen; the vertical movement mechanism 300 further includes a driving part 310 installed inside the support body 100; the driving part 310 is provided at a side thereof with a bending plate 330, the bending plate 330 includes a first plate for fixing a flat cable of the screen assembly 400 and a second plate for protecting a main control board in the support body 100, with an angle therebetween.

Further, the release film 210 is detachably connected with the trough frame 220; or the release film 210 and the chute frame 220 are integrally formed by injection molding.

In the description of the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are orientation or positional relationship based on the drawings, merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A stereolithography apparatus, comprising:

the upper bottom plate is provided with a light hole and a convex part positioned on the periphery of the light hole;

the trough assembly comprises a release film and trough frames with openings at two ends, and the release film is connected with the trough frames to close the bottom surface openings of the trough frames;

the trough frame is mounted on the upper bottom plate, the upper surface of the protruding portion is higher than the mounting bottom surface of the trough frame, and the protruding portion supports the release film so that the release film is tensioned.

2. The stereolithography apparatus according to claim 1, wherein the upper plate has a mounting groove formed therein, the mounting groove being located on a peripheral side of the light-transmitting hole, the protruding portion being formed between the mounting groove and the light-transmitting hole.

3. The stereolithography apparatus according to claim 2, further comprising:

the locking mechanism is at least arranged on the upper bottom plate and is used for locking the trough assembly on the upper bottom plate;

the locking mechanism comprises a locking screw, a first connecting hole is formed in the trough frame, a second connecting hole is formed in the upper bottom plate, and the locking screw penetrates through the first connecting hole and is connected with the second connecting hole so as to lock the trough frame on the upper bottom plate;

The second connecting hole extends into the mounting groove from one side of the mounting groove away from the light transmission hole;

the two second connecting holes are distributed along the length direction of the upper bottom plate; or alternatively, the first and second heat exchangers may be,

the locking mechanism comprises a clamping groove arranged on the trough frame and a buckle arranged on the upper bottom plate, and the clamping groove is matched with the buckle to lock the trough frame on the upper bottom plate;

the two buckles are arranged on two sides of the mounting groove along the length direction of the upper bottom plate.

4. The stereolithography apparatus as claimed in claim 2, wherein,

the bottom surface of the trough frame is positioned in the mounting groove, and the top surface of the convex part is higher than the bottom surface of the trough frame;

wherein the distance between the top surface of the protruding part and the bottom surface of the mounting groove is 0.3mm to 1mm;

the convex part is of an annular structure, or the convex part is a plurality of convex blocks distributed at intervals along the periphery of the mounting groove.

5. The stereolithography apparatus as claimed in claim 2, wherein,

the bottom of the mounting groove is provided with a first limiting part, the bottom surface of the groove frame is provided with a second limiting part, and the first limiting part and the second limiting part are matched and used for limiting the movement of the groove frame relative to the upper bottom plate;

One of the first limiting part and the second limiting part is of a groove structure, and the other one of the first limiting part and the second limiting part is of a protruding structure.

6. The stereolithography apparatus as claimed in claim 2, wherein,

the upper bottom plate is provided with a third limiting part, at least one side wall of the mounting groove is connected with the third limiting part, the side surface of the trough frame is provided with a fourth limiting part, and the third limiting part and the fourth limiting part are matched and used for limiting the movement of the trough frame relative to the upper bottom plate;

the third limiting part is a slot, the fourth limiting part is an inserting block, and the opening direction of the slot is perpendicular to the opening direction of the mounting groove;

the two slots are distributed on the same side of the mounting groove along the length direction of the upper bottom plate.

7. The stereolithography apparatus according to claim 6, further comprising:

the support main body comprises an upper bottom plate and a vertical movement mechanism, and the vertical movement mechanism is connected with the support main body;

the third limiting part is connected with the side wall of the mounting groove, which is close to one side of the vertical movement mechanism.

8. The stereolithography apparatus as recited in claim 7, further comprising a screen adjustment assembly,

the screen adjusting assembly comprises a floating platform, wherein the floating platform is positioned at the light hole and is movable relative to the upper bottom plate;

the corner of the floating platform is provided with a first matching part, and the first matching part is of a cambered surface structure.

9. The stereolithography apparatus as recited in claim 7, further comprising a molding platform and screen assembly,

the molding platform and the vertical movement mechanism;

the inner wall of the light hole is provided with a mounting boss, and the screen assembly is connected with the upper bottom plate through the mounting boss;

the screen assembly comprises a screen and a floating plate arranged on the periphery of the screen, wherein the transverse length of the forming platform is larger than that of the screen, and/or the longitudinal length of the forming platform is larger than that of the screen;

the vertical movement mechanism further comprises a driving part, and the driving part is arranged in the supporting main body;

the side of drive portion is provided with the bending plate, the bending plate includes first board and second board, first board with have the contained angle between the second board, first board is used for fixing the winding displacement of screen subassembly, the second board is used for the protection main control board in the support main body.

10. The stereolithography apparatus as claimed in claim 1, wherein,

the release film is detachably connected with the trough frame; or alternatively

The release film and the trough frame are integrally formed in an injection molding mode.