CN221136922U

CN221136922U - Three-dimensional forming equipment

Info

Publication number: CN221136922U
Application number: CN202322426070.0U
Authority: CN
Inventors: 韦华忠; 蒙海强; 邓新桥
Original assignee: Shenzhen Anycubic Technology Co Ltd
Current assignee: Shenzhen Anycubic Technology Co Ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-06-14
Anticipated expiration: 2033-09-06

Abstract

The utility model provides a three-dimensional forming device. The three-dimensional molding device includes: the trough comprises a first release film positioned at the bottom; the exposure device is positioned below the trough and is configured to move along the horizontal direction relative to the trough, and in the moving process, the exposure device is contacted with the first release film to drive at least part of the first release film to deform; the first detection device is arranged on the exposure device and is used for detecting a first detection value used for representing the stress of the exposure screen device; and the control device is connected with the first detection device to judge whether the stress condition of the exposure device is normal or not according to the first detection value. Therefore, the size of the exposure screen can be reduced, segmented exposure is realized, the manufacturing cost is reduced, the printing range is enlarged, the rapid demoulding of the printing model is realized, and meanwhile, whether the motion of the exposure device is smooth or not can be detected, so that a user is reminded of adjusting printing parameters according to the motion condition of the exposure device, and the printing success rate and the printing quality are improved.

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.

Existing light curing three-dimensional former, like the prior art of publication number CN209903944U, disclose a novel 3D printer cooling system, including the frame, set up the silo in the frame and the print platform of silo top, from the top down sets gradually in the frame: trough, projection screen and light screen, lamp plate, cooling chamber. In order to ensure that the pattern of the print layer displayed on the projection screen is accurately exposed on the trough, the projection screen is usually sized to correspond to the size of the bottom surface of the trough, and for this reason, when the model to be printed is large, the projection screen needs to be sized to be large, which is costly.

Disclosure of utility model

In view of the above, the present utility model provides a stereoscopic forming apparatus, which can reduce the size of an exposure screen, realize segmented exposure, reduce manufacturing cost, expand printing range, and realize rapid demolding of a printing model, and at the same time, can detect whether the motion of an exposure device is smooth or not, so as to remind a user to adjust printing parameters according to the motion condition of the exposure device, so as to improve printing success rate and printing quality.

An embodiment of the present utility model provides a stereoscopic molding apparatus including: the trough comprises a first release film positioned at the bottom; the exposure device is positioned below the trough and is configured to move along the horizontal direction relative to the trough, and in the moving process, the exposure device is contacted with the first release film to drive at least part of the first release film to deform; the first detection device is arranged on the exposure device and is used for detecting a first detection value used for representing the stress of the exposure device; and the control device is connected with the first detection device to judge whether the stress condition of the exposure device is normal or not according to the first detection value.

The trough assembly and the stereoscopic forming equipment provided by the embodiment of the utility model comprise a trough, an exposure device, a first detection device and a control device, wherein the exposure device is positioned below the trough and comprises an exposure screen with the width smaller than the length of the trough, the exposure device is configured to move along the horizontal direction relative to the trough and drive at least one part of a first release film to deform, and the first detection device is used for detecting whether the stress condition of the exposure screen is normal or not; the control device is connected with the first detection device to send prompt information according to the detection information of the first detection device. Therefore, the size of the exposure screen is reduced, the exposure device moves along the horizontal direction relative to the trough, the effects of sectional exposure, manufacturing cost reduction and printing range expansion can be realized, the rapid demolding of a printing model can be realized, the diversification of the functions of the exposure device is realized, meanwhile, whether the stress condition of the exposure screen is normal or not is detected through the first detection device, and whether the movement of the exposure device is smooth or not can be judged, so that the control device sends corresponding prompt information according to the detection information of the first detection device, and a user is reminded to adjust printing parameters under the condition that the movement of the exposure device is not smooth, thereby improving the printing success rate and the printing quality.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

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 the structure of a stereolithography apparatus according to a first embodiment of the present utility model;

Fig. 2 is a schematic view showing the structure of a stereolithography apparatus according to a second embodiment of the present utility model;

Fig. 3 is a schematic view showing the structure of a stereolithography apparatus according to a third embodiment of the present utility model;

Fig. 4 is a schematic view showing the structure of a stereolithography apparatus according to a fourth embodiment of the present utility model;

Fig. 5 is a schematic view showing the structure of a stereolithography apparatus according to a fifth embodiment of the present utility model;

Fig. 6 is a schematic view showing the structure of a stereolithography apparatus according to a sixth embodiment of the present utility model;

Fig. 7 is a schematic view showing the structure of a stereolithography apparatus according to a seventh embodiment of the present utility model;

fig. 8 is a schematic view showing the structure of a stereolithography apparatus according to an eighth embodiment of the present utility model;

FIG. 9 shows a schematic view of the embodiment of FIG. 8 in another orientation;

Fig. 10 is a schematic view showing the structure of a stereolithography apparatus according to a ninth embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 10 is:

100 trough, 110 first release film, 200 exposure device, 210 exposure screen, 220 bearing part, 221 fixed part, 222 first strain hole, 230 movable device, 240 second release film, 300 first detection device, 400 shaping platform, 410 connecting arm, 411 second strain hole, 500 second detection device, 600 base, 610 guide rail, 620 guide slot, 700 horizontal movement mechanism, 710 first drive part, 720 first transmission device, 730 lead screw, 740 guide nut, 750 second transmission device, 760 driving wheel, 770 hold-in range, 780 movable platform, 782 guide wheel, 790 driven wheel, 800 vertical movement mechanism, 810 second drive part, 910 scalable dust cover, 920 dust cover, 921 dodging hole, 930 sealing member.

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, which may be a photo-curing three-dimensional printer, according to some embodiments of the present utility model is described below with reference to fig. 1 to 10.

As shown in fig. 1 to 10, an embodiment of the present utility model provides a stereolithography apparatus, comprising: a trough 100 including a first release film 110 at the bottom; an exposure device 200 and a first detection device 300, the exposure device 200 being located below the trough 100, the exposure device 200 being configured to be movable in a horizontal direction with respect to the trough 100; during the moving process, the exposure device 200 is contacted with the first release film 110 to drive at least a part of the first release film 110 to deform, the first detection device 300 is disposed on the exposure device 200, and the first detection device 300 is used for detecting a first detection value for representing the stress of the exposure device 200; and the control device is connected with the first detection device 300 to judge whether the stress condition of the exposure device 200 is normal according to the first detection value.

As shown in fig. 1 and 2, the trough 100 is used for accommodating photo-curing materials, for example, the trough 100 is used for accommodating resin, and the trough 100 is located above the exposure device 200. It will be appreciated that the stereolithography apparatus further comprises a shaping platform 400, the shaping platform 400 being located above the trough 100, the shaping platform 400 being configured to be movable closer to or farther from the trough 100, in particular the shaping platform 400 being configured to be movable closer to or farther from the trough 100 in a vertical direction, as indicated by arrow Z in fig. 1 to 10, whereby the relative positions of the shaping platform 400 and the trough 100 can be adjusted such that the shaping platform 400 is located at a suitable position of the trough 100. When the molding platform 400 is positioned at a proper position of the trough 100, the exposure device 200 emits light for exposure to the trough 100, and the light irradiates to the surface of the photo-curing material in the trough 100, so that the photo-curing material can be cured on the printing platform, and the printing of the three-dimensional model is realized.

In the related art stereolithography apparatus, in order to ensure that the pattern of the print layer displayed on the projection screen is accurately exposed on the trough, the size of the projection screen is generally equivalent to the size of the bottom surface of the trough, and for this reason, when the printed model is large, it is necessary to set the size of the projection screen to be large, which is costly. Therefore, the stereoscopic forming apparatus provided by the utility model, the exposure device 200 comprises the exposure screen 210, the width of the exposure screen 210 is smaller than the length of the trough 100, wherein the width direction of the exposure device 200 is parallel to the length direction of the trough 100, and the exposure device 200 is arranged to be horizontally movable along the length direction of the trough 100 (namely, the width direction of the exposure device 200), so that the exposure device 200 can ensure that the pattern of each printing layer is accurately and completely exposed at different positions of the first release film 110 at the bottom of the trough 100 in sequence, the accurate and complete exposure of the pattern of the whole printing layer in the trough 100 is realized, and the accuracy and reliability of model printing are ensured. Meanwhile, since the width of the exposure screen 210 is smaller than the length of the trough 100, the width of the exposure screen 210 is reduced, the manufacturing cost of the exposure device 200 is reduced, and the sectional exposure can be realized, so that the requirement of printing a larger model is met, the setting of the exposure device 200 is not limited by the size of the printing model, the application range is enlarged, and meanwhile, the space occupied by the exposure device 200 is reduced, and the design requirement of compact structure and small volume of the three-dimensional forming equipment can be met.

The width direction of the exposure device 200 and the length direction of the trough 100 may be the left-right direction of the stereolithography apparatus as shown by the arrow X direction in fig. 1, 2, 3, 4, 6, 7, 8, 9, and 10, or the width direction of the exposure device 200 and the length direction of the trough 100 may be the front-rear direction of the stereolithography apparatus as shown by the arrow Y direction in fig. 5. In other embodiments, the specific directions of the width direction of the exposure device 200 and the length direction of the trough 100 may be changed as appropriate, and the present utility model uses the above directions for illustration, and the size of the exposure device 200 is smaller than the size of the trough 100 in the same direction.

As shown in fig. 1, the first release film 110 is located at the bottom of the trough 100, where the first release film 110 is a flexible member, so that the first release film 110 can deform under the action of external force, and it can be understood that the deformation of the first release film 110 can be local deformation or integral deformation. As shown in fig. 2, if the printing platform drives the printing model solidified on the printing platform to move in a direction away from the trough 100, the first release film 110 is easily deformed due to the adhesion between the printing model in the trough 100 and the first release film 110, so that the first release film 110 is driven to move in a direction close to the printing platform under the action of the attachment force of the printing material model, that is, the printing model on the printing platform has a certain pulling force on the first release film 110, and at this time, if the plastic deformation of the first release film 110 is larger, the separation of the printing model and the first release film 110 is inconvenient.

For this reason, as shown in fig. 1, the stereoscopic forming apparatus provided by the present utility model drives at least a portion of the first release film 110 to deform by the exposure device 200, for example, the exposure device 200 contacts the first release film 110 and lifts up at least a portion of the first release film 110, so that the printing model cured on the first release film 110 can be synchronously lifted up along with the deformed first release film 110, thereby, in cooperation with the movement of the exposure device 200 relative to the trough 100 in the horizontal direction, when the exposure screen 210 moves to the next section to continue to expose the curing model, the lifted up portion of the first release film 110 also moves along with the movement of the lifted up portion of the first release film 110 due to elastic recovery and leaving of the printing model, so as to realize automatic release. Therefore, the exposure device 200 moves relative to the trough 100, and can jack up different parts of the first release film 110 in sequence, so that automatic release of the printing model is realized gradually, the printing model is quickly, conveniently and completely separated from the first release film 110, and quick demoulding of the printing model is realized. Therefore, the exposure device 200 moves along the horizontal direction relative to the trough 100, so that the effect of segmented exposure can be realized, the effect of rapid demoulding of a printing model can be realized, the diversification of the functions of the exposure device 200 is realized, and the device is suitable for popularization and application.

Meanwhile, the structure for driving at least part of the deformation of the first release film 110 is integrated on the exposure device 200, so that the design requirements of compact structure and small volume of the three-dimensional forming equipment can be met.

Wherein, as shown in fig. 1, the first detection device 300 is used for detecting a first detection value representing the stress condition of the exposure screen 210, so as to realize the detection of the motion state of the exposure device 200 by the control device. It can be appreciated that since the exposure device 200 is in contact with the first release film 110 to drive at least a portion of the first release film 110 to deform, so that the exposure device 200 is in contact with the first release film 110 during printing, it can be determined whether the movement of the exposure device 200 relative to the first release film 110 is smooth by detecting the first detection value representing the exposure screen 210 with the first detection device 300. Specifically, when the first control device determines that the stress of the exposure screen 210 is in the abnormal range, it indicates that the movement of the exposure device 200 relative to the first release film 110 is not smooth, the movement resistance is too large, and there are problems that the printing reliability is affected and the printing quality is affected. Therefore, the control device can send prompt information, such as abnormal prompt information, for example, abnormal prompt information of the exposure device 200 to remind a user that the exposure device 200 is blocked from moving, and the problem of affecting the printing success rate and the printing quality exists, so that the user can readjust the printing parameters according to the prompt information to ensure the printing success rate and the good printing quality.

When the control device determines that the stress of the exposure screen 210 is within the normal range, it indicates that the exposure device 200 can move smoothly relative to the first release film 110 at this time, the control device does not send a prompt message, or sends a normal prompt message, for example, a prompt message that the exposure device 200 moves normally, so that the user knows that the exposure device 200 of the stereoscopic forming apparatus is in a normal working state at this time.

That is, according to the embodiment provided by the utility model, the size of the exposure screen 210 is reduced, the exposure device 200 moves along the horizontal direction relative to the trough 100, so that the effects of segmented exposure, manufacturing cost reduction and printing range expansion can be realized, the effect of rapid demoulding of a printing model can be realized, the diversification of the functions of the exposure device 200 is realized, meanwhile, the first detection value representing the stress of the exposure screen 210 is detected by the first detection device 300, and the control device can judge whether the movement of the exposure device 200 is smooth or not according to the first detection value, so that the control device sends corresponding prompt information, and can remind a user to adjust printing parameters under the condition that the movement of the exposure device 200 is not smooth, so that the printing success rate and the printing quality are improved.

As shown in fig. 1 and fig. 2, in some possible embodiments of the present utility model, the stereo lithography apparatus further includes a second detecting device 500, where the second detecting device 500 is configured to detect a second detection value for characterizing the stress of the lithography stage 400, and because during the printing process, the lithography stage 400 needs to be moved one by a distance away from the thickness of the print layer in a direction away from the trough 100, so as to achieve layer-by-layer printing, during each layer of printing process, the lithography stage 400 needs to be placed in parallel with respect to the first release film 110 to ensure the print quality, and at this time, the stress of the lithography stage 400 is relatively uniform and is within a normal range. When the molding platform 400 is not parallel to the first release film 110, such as when the molding platform 400 is not flat, one end of the molding platform 400 is closer to the first release film 110, and the other end is farther from the first release film 110. Thus, the force condition of the molding platform 400 is detected by the two detection devices, and the control device can determine whether the molding platform 400 is placed in parallel relative to the first release film 110.

The second detection value sent by the second detection device 500 enables the control device to synthesize factors such as whether the motion of the exposure device 200 is smooth, whether the forming platform 400 is leveled or not, and reasonably send prompt information, so that a user can pertinently and accurately adjust printing parameters according to the corresponding prompt information, thereby improving the efficiency of adjusting the printing parameters, avoiding printing problems, improving printing efficiency, and improving printing success rate and printing quality.

Specifically, when the control device determines that the stress condition of the exposure device 200 is abnormal according to the first detection value and the second detection value, and the stress condition of the molding platform 400 is normal, which means that the resistance between the exposure device 200 and the first release film 110 is large, which may be caused by serious plastic deformation of the first release film 110, the tensioning state of the first release film 110 needs to be replaced or adjusted in time, at this time, the control device may be in an abnormal range according to the first detection value and the second detection value is in a normal range, and send a first prompt message to remind the user to replace or adjust the tensioning state of the first release film 110.

When the control device determines that the stress condition of the exposure device 200 is normal and the stress condition of the molding platform 400 is abnormal according to the first detection value and the second detection value, it indicates that the resistance between the exposure device 200 and the first release film 110 is large, which may be that the molding platform 400 is uneven, and the leveling operation of the molding platform 400 needs to be performed again. At this time, the control device may send a second prompt message according to the first detection value being in the normal range and the second detection value being in the abnormal range, so as to remind the user to perform the re-leveling operation on the molding platform 400.

When the control device determines that the stress condition of the exposure device 200 is abnormal according to the first detection value and the second detection value, and the stress condition of the molding platform 400 is abnormal, it means that the resistance between the exposure device 200 and the first release film 110 is large, which may be that the exposure screen 210 is uneven with the printing model or the printing model is uneven with the printing molding platform, and the leveling operation of the molding platform 400 needs to be performed again. At this time, the control device may send a third prompting message according to the first detection value being in the abnormal range and the second detection value being in the abnormal range, so as to remind the user to perform the re-leveling operation on the molding platform 400.

As shown in fig. 1, in some possible embodiments of the present utility model, the exposure device 200 further includes a carrying portion 220 and a movable device 230, where the exposure screen 210 is connected to the top of the carrying portion 220, and the movable device 230 is movably connected to the carrying portion 220 and abuts against the first release film 110. Wherein the movable device 230 may be a roller or other mechanism. Specifically, the moving device 230 may be two rollers, the two rollers are distributed on two sides of the exposure screen 210 along the length direction of the trough 100, at least a portion of the first release film 110 is deformed by abutting the rollers against the first release film 110, and the exposure screen 210 is located between the two rollers, so that in the process of moving the exposure device 200 along the length direction of the trough 100, the exposure screen 210 can be gradually opposite to different portions of the first release film 110 to realize complete exposure of the first release film 110, and meanwhile, the two rollers can jack up the first release film 110 of different portions to realize rapid demolding of the printing model. Specifically, the rollers are connected to the carrying part 220 through bearings, such that the rollers are rotatable with respect to the carrying part 220, and during the movement of the exposure apparatus 200, the rollers rotate along the first release film 110 to lower different portions of the first release film 110 to jack up.

As shown in fig. 1 and 2, in the above embodiment, the first detecting device 300 includes a first strain gauge, a first strain hole 222 is formed on the carrying portion 220, the first strain hole 222 penetrates the carrying portion 220 along a horizontal direction, and the first strain gauge is connected to an outer side of the carrying portion 220 and is opposite to a thin wall of the first strain hole 222.

The bearing portion 220 may deform under an external force, and the degree of deformation may not be obvious. For this reason, by providing the first strain hole 222 on the bearing portion 220, the first strain hole 222 is a thin-wall hole, for example, the thickness between the first strain hole 222 and the outer wall of the bearing portion 220 is smaller, so that even if the bearing portion 220 is deformed slightly under the condition of receiving an external force, the deformation at the thin wall of the first strain hole 222 is increased, that is, the deformation at the thin wall of the first strain hole 222 is more obvious. Therefore, the first strain gauge is connected to the outer side of the bearing portion 220 and opposite to the thin wall of the first strain hole 222, and the strain of the thin wall of the first strain hole 222 is detected by the first strain gauge, so that the stress condition of the exposure screen 210 located at the top of the bearing portion 220 can be detected more accurately and sensitively. The setting mode has the advantages of simple structure and lower cost.

The thin wall of the first strain hole 222 may be understood as a position corresponding to a minimum value of a wall thickness between the first strain hole 222 and the outer wall of the bearing portion 220.

As shown in fig. 1 and fig. 2, in the above embodiment, the first strain hole 222 is a long strip hole arranged along the vertical direction, and since the exposure screen 210 is located at the top of the bearing portion 220, the first strain hole 222 is set to be a long strip hole arranged along the vertical direction, when the stress of the exposure screen 210 is in an abnormal range and the movement of the exposure screen 210 is blocked, the deformation of the long strip hole is obvious, so that the first strain sheet can accurately and sensitively detect the stress condition of the exposure screen 210.

More specifically, the first strain hole 222 may include a plurality of circular through holes arranged along a vertical direction, the plurality of circular through holes are communicated, and first strain gauges may be respectively disposed at thin walls of the plurality of circular through holes, so as to obtain the first detection value through the plurality of first strain gauges. If the number of the round through holes is two, the first strain gauges are respectively arranged on the thin walls of the round through holes, which are close to the openings at the two ends, then the four first strain gauges can form a full-bridge circuit, so that the detection sensitivity is higher. Or in some other embodiments, the first strain hole 222 includes a plurality of circular through holes arranged in an array, and the plurality of circular through holes are communicated, so that the structural strength of the bearing portion 220 can be guaranteed, the coverage range of the circular through holes is increased, and the perceived deformation amount is increased, so that the deformation is more concentrated.

The thin wall of the first strain hole 222 is located on the side surface of the bearing portion 220, so that the assembly of the first strain gauge and the bearing portion 220 is facilitated, and the replacement of the first strain gauge is also facilitated.

Wherein the wall thickness at the thin wall of the first strain hole 222 is 0.5mm to 10mm, specifically, the wall thickness at the thin wall of the first strain hole 222 may be 0.5mm, 1mm, 2mm, 10mm, or other values. It can be appreciated that, the wall thickness at the thin wall of the first strain hole 222 may be reasonably set according to the vertical length of the first strain hole 222, so that the deformation of the first strain hole 222 can be accurately associated with the stress condition of the exposure screen 210, so as to ensure the accuracy and sensitivity of the first detection device 300 in detecting the structure.

Specifically, the first strain holes 222 are circular holes at two ends in the vertical direction, such as the first strain holes 222 are elongated holes with circular ends. The first strain gage is connected to the outer side of the bearing portion 220 and opposite to the center of the circular hole, so as to ensure that the first strain gage is located at the thin wall of the first strain hole 222. It can be appreciated that a plurality of first strain gages may also be provided to improve accuracy of the detection result. Specifically, the first strain gauge may be a resistive strain gauge.

As shown in fig. 1, 2 and 3, in some possible embodiments provided by the present utility model, the stereolithography apparatus further includes: the base 600 and the horizontal movement mechanism 700, the top of base 600 is provided with the printing opacity portion, and silo 100 is located printing opacity portion department, and horizontal movement mechanism 700 and exposure device 200 all set up in base 600, and horizontal movement mechanism 700 is connected with exposure device 200 to drive exposure device 200 and follow the horizontal direction and remove, exposure light is projected to silo 100 through exposure screen 210, printing opacity portion.

The light transmitting portion may be a light transmitting hole or a light transmitting member, the light transmitting member may be a light transmitting glass plate or a light transmitting plastic plate, the trough 100 is located above the base 600 and is located at the light transmitting portion, and the exposure device 200 and the horizontal movement mechanism 700 are both disposed in the base 600. The exposure device 200 is driven to horizontally move along the length direction of the trough 100 by the horizontal movement mechanism 700 so that exposure light is radiated into the trough 100 through the exposure screen 210 and the light transmitting part.

Specifically, the horizontal movement mechanism 700 may drive the exposure device 200 to reciprocate along the length direction of the trough 100, as shown in fig. 1 to 4 and 6 to 10, the horizontal movement mechanism 700 may drive the exposure device 200 to move from right to left or from left to right along the arrow X direction, so that after the horizontal movement mechanism 700 and the exposure device 200 cooperate to complete the complete exposure of the pattern of one print layer in the trough 100, the exposure device 200 is driven to horizontally move in the reverse direction by the horizontal movement mechanism 700, so that the pattern of the other print layer can be completely exposed in the trough 100. Printing of the entire model can thus be achieved by the cooperation of the horizontal movement mechanism 700 and the exposure apparatus 200. It will be appreciated that the horizontal movement mechanism 700 may also drive the exposure apparatus 200 to move in the direction of arrow Y from front to back, or from back to front, as shown in fig. 5.

As shown in fig. 2 and 3, in the above embodiment, the horizontal movement mechanism 700 includes the first driving part 710 and the first transmission device 720, and the first driving part 710 and the bearing part 220 are in transmission connection through the first transmission device 720, so that power can be transmitted to the bearing part 220 through the first driving part 710 and the first transmission device 720, and the bearing part 220 is driven to drive the exposure screen 210 to move along the horizontal direction. The first driving part 710 may be a motor.

As shown in fig. 1 to 5, in some possible embodiments of the present utility model, the stereolithography apparatus further includes: the vertical movement mechanism 800 and the connecting arm 410, the vertical movement mechanism 800 is arranged on the base 600, and the vertical movement mechanism 800 is connected with the forming platform 400 through the connecting arm 410 to drive the forming platform 400 to approach or separate from the trough 100 along the vertical direction. Wherein the vertical direction is shown as arrow Z direction in fig. 1 to 10. The vertical movement mechanism 800 may be a screw mechanism, a slide mechanism, or other mechanisms as required, and the present utility model will not be specifically described.

As shown in fig. 1 and 2, in the above embodiment, the second detecting device 500 includes a second strain gauge, a second strain hole 411 is formed on the connecting arm 410, the second strain hole 411 penetrates the connecting arm 410 along the horizontal direction, and the second strain gauge is connected to the outer side of the connecting arm 410 and is opposite to the thin wall of the second strain hole 411.

The connecting arm 410 may deform under the condition of external force, and the deformation degree may not be obvious, so that the connecting arm 410 is connected with the forming platform 400, and the deformation condition of the connecting arm 410 may be affected by the stress condition of the forming platform 400. For this reason, by providing the second strain hole 411 on the connection arm 410, the second strain hole 411 is a thin-walled hole, for example, the thickness between the second strain hole 411 and the outer surface of the connection arm 410 is smaller, so that even if the connection arm 410 is deformed slightly under the condition of receiving an external force, the deformation at the thin wall of the second strain hole 411 is increased, that is, the deformation at the thin wall of the second strain hole 411 is more obvious. Therefore, the second strain gauge is connected to the outer side of the connecting arm 410 and opposite to the thin wall of the second strain hole 411, and the deformation of the thin wall of the second strain hole 411 is detected by the second strain gauge, so that the stress condition of the forming platform 400 connected to the connecting arm 410 can be detected more accurately and sensitively. The setting mode has the advantages of simple structure and lower cost.

Here, the thin wall of the second strain hole 411 may be understood as a position corresponding to a minimum value of the wall thickness between the second strain hole 411 and the outer wall of the connection arm 410.

In the above embodiment, the thin wall of the second strain hole 411 is located at the top and/or bottom of the connecting arm 410, and since the forming platform 400 is located below the connecting arm 410, the thin wall of the second strain hole 411 is located at the top and/or bottom of the connecting arm 410, so that when the stress of the forming platform 400 is in an abnormal range and the movement of the exposure screen 210 is blocked, the deformation of the thin wall of the second strain hole 411 located at the top and/or bottom of the connecting arm 410 is obvious, so that the second strain gauge can accurately and sensitively detect the stress condition of the forming platform 400.

The end of the connecting arm 410 is connected to the forming platform 400, so that the forming platform 400 is located below the connecting arm 410, and the thin wall of the second strain hole 411 is disposed at the top or bottom of the bearing portion 220, or at the top and bottom, so that the second strain gauge is convenient to assemble with the connecting arm 410, and also convenient to replace.

Wherein the wall thickness at the thin wall of the second strain hole 411 is 0.5mm to 10mm, in particular, the wall thickness at the thin wall of the second strain hole 411 may be 0.5mm, 1mm, 2mm, 10mm, or other values.

Specifically, as shown in fig. 1 and 2, the second strain hole 411 is a circular hole at both ends in the horizontal direction, such as a strip hole with both ends circular in the second strain hole 411. The second strain gage is attached to the outside of the connecting arm 410 opposite the center of the circular aperture to ensure that the second strain gage is located at the thin wall of the second strain aperture 411. It can be appreciated that a plurality of second strain gauges may also be provided to improve the accuracy of the detection result. Specifically, the second strain gauge may be a resistive strain gauge.

The second strain hole 411 may include a plurality of circular through holes arranged in a horizontal direction, the plurality of circular through holes are communicated, and second strain gauges may be respectively disposed at thin walls of the plurality of circular through holes, so as to obtain a second detection value through the plurality of second strain gauges. If two circular through holes are provided, the thin walls of the circular through holes close to the openings at the two ends are respectively provided with the second strain gauges, and then the four second strain gauges can form a full-bridge circuit, so that the detection sensitivity is higher. Or in some other embodiments, the second strain hole 411 includes a plurality of circular through holes arranged in an array, where the plurality of circular through holes are communicated, so as to ensure the structural strength of the connecting arm 410, increase the coverage range of the circular through holes, and increase the perceived deformation amount, so that the deformation is more concentrated.

In some possible embodiments of the present utility model, the length of the effective print area of the release film 110 along the first direction is a first length, the length of the effective print area of the release film 110 along the second direction is a second length, the first direction is perpendicular to the second direction, and the first direction and the second direction are both directions parallel to the horizontal plane.

The first driving part 710 is for driving the exposure apparatus 200 in a first direction or a second direction, and in particular, the first direction may be a direction indicated by an arrow X in fig. 1 to 10 and the second direction may be a direction indicated by an arrow Y in fig. 1 to 10. Specifically, as shown in fig. 1 to 4 and 6 to 10, the first driving part 710 is used to drive the exposure apparatus 200 to move in a first direction (i.e., a direction indicated by an arrow X), and specifically, as shown in fig. 5, the first driving part 710 is used to drive the exposure apparatus 200 to move in a second direction (i.e., a direction indicated by an arrow Y).

In the above embodiment, the vertical movement mechanism 800 includes the second driving portion 810 located in the base 600, where the first driving portion 710 drives the exposure device 200 to move horizontally along the first direction, the first driving portion 710 and the second driving portion 810 are staggered in the horizontal plane projection, and the length of the light emitting surface along the first direction when the light emitted from the exposure device 200 reaches the trough 100 is a third length, which is smaller than the first length. Or in the case that the exposure device 200 moves horizontally along the second direction, the first driving portion 710 and the second driving portion 810 are at least partially overlapped on a horizontal plane projection, and a length of the light emitting surface along the second direction when the light emitted by the exposure device 200 reaches the trough 100 is a fourth length, where the fourth length is smaller than the second length.

As shown in fig. 5, when the exposure apparatus 200 moves horizontally in the direction indicated by the arrow Y, the first driving portion 710 and the second driving portion 810 are at least partially overlapped on the horizontal plane projection, for example, the first driving portion 710 may be located below the second driving portion 810, or the first driving portion 710 and the second driving portion 810 may be located in the direction indicated by the arrow X, for example, the first driving portion 710 is located at one side of the second driving portion 810 in the direction indicated by the arrow X.

When the exposure apparatus 200 is horizontally moved in the direction indicated by the arrow X, the first driving part 710 and the second driving part 810 are staggered in a horizontal plane projection, providing a sufficient moving space for the exposure apparatus 200.

As shown in fig. 1, 3, 4 and 5, in some possible embodiments of the present utility model, the first transmission device 720 includes a screw 730 and a guide nut 740 that are in threaded connection, the guide nut 740 is connected to the bearing portion 220, and the first driving portion 710 is configured to drive the screw 730 to rotate, so that the screw 730 and the guide nut 740 move relatively to drive the exposure device 200 to move relative to the base 600. That is, the first transmission device 720 is a screw-nut mechanism, and the arrangement is simple in structure and low in cost. It can be appreciated that, by using a transmission device such as a screw-nut, the first driving portion 710 may drive the carrying portion 220 to drive the exposure screen 210 along the direction indicated by the arrow X relative to the base 600, as shown in fig. 1, 3 and 4, or may drive the carrying portion 220 to drive the exposure screen 210 to move along the direction indicated by the arrow Y relative to the base 600, as shown in fig. 5.

Specifically, the first driving part 710 may be rotated forward and backward to drive the screw rod 730 to rotate forward or backward, and the exposure screen 210 is driven to move forward or backward relative to the base 600 by the guide nut 740, wherein the forward or backward movement of the exposure screen 210 relative to the base 600 may be understood as movement of the exposure screen 210 relative to the left or right of the base 600, or the forward or backward movement of the exposure screen 210 relative to the base 600 may be understood as movement of the exposure screen 210 relative to the front or rear of the base 600.

As shown in fig. 4 and 5, in a specific example, the first driving part 710 is disposed along the axis of the screw 730, specifically: the first driving part 710 and the screw 730 are arranged in the X-axis direction if the axis of the screw 730 is parallel to the direction indicated by the arrow X, and the first driving part 710 and the screw 730 are arranged in the Y-axis direction if the axis of the screw 730 is parallel to the direction indicated by the arrow Y. In this example, the first driving part 710 and the screw 730 may be directly connected by a key, a coupling, or the like.

As shown in fig. 3, in another specific example, the first driving part 710 is disposed along a radial direction of the screw 730, and the first driving part 710 and the screw 730 are drivingly connected through the second transmission 750. The method comprises the following steps: if the axis of the screw rod 730 is parallel to the direction indicated by the arrow X, the first driving part 710 and the screw rod 730 are arranged along the Y-axis direction, and if the axis of the screw rod 730 is parallel to the direction indicated by the arrow Y, the first driving part 710 and the screw rod 730 are arranged along the X-axis direction, and meanwhile, the second transmission device 750 is configured to be capable of transmitting the power of the first driving part 710 to the screw rod 730 to drive the screw rod 730 to rotate. This kind of setting can reduce the space that first drive portion 710 occupy in the axis direction of screw 730, and then can reduce the size of base 600 in the axial direction of screw 730, can satisfy the design demand that base 600 is less, compact structure, and then reduces the overall dimension of three-dimensional shaping equipment, reduction in manufacturing cost.

As shown in fig. 3, the second transmission device 750 includes a transmission belt or a transmission gear, so that the power of the first driving part 710 can be transmitted to the screw 730 by using the transmission belt or the transmission gear to drive the screw 730 to rotate. The driving belt may be a timing belt 770, and the driving gear may include two, three or more gears.

As shown in fig. 2, 7, 8, 9 and 10, in some possible embodiments of the present utility model, the first transmission device 720 includes a driving wheel 760, a driven wheel 790, and a timing belt 770, where the driving wheel 760 is connected to the first driving portion 710, the driven wheel 790 is fixed on the base 600, the timing belt 770 is sleeved on the driving wheel 760 and the driven wheel 790, and the bearing portion 220 is connected to the timing belt 770.

That is, the first transmission device 720 is a synchronous belt transmission mechanism, and the first driving part 710 drives the driving wheel 760 to rotate, so that the synchronous belt 770 wound around the driving wheel 760 and the driven wheel 790 rotates, and further drives the bearing part 220 connected to the synchronous belt 770 to move along with the synchronous belt 770, so as to realize the movement of the exposure screen 210 in the horizontal direction. The device has simple structure and low cost. It can be appreciated that the first driving portion 710 may drive the bearing portion 220 to move the exposure screen 210 relative to the base 600 in the direction indicated by the arrow X or the direction indicated by the arrow Y through a transmission device such as a synchronous belt. Specifically, the first driving part 710 may be rotated forward and backward to drive the timing belt 770 to rotate forward and backward, driving the exposure screen 210 to move forward or backward in a horizontal direction with respect to the base 600, wherein the forward or backward movement of the exposure screen 210 with respect to the base 600 may be understood as movement of the exposure screen 210 in both left or right directions with respect to the base 600, or the forward or backward movement of the exposure screen 210 with respect to the base 600 may be understood as movement of the exposure screen 210 in both front or rear directions with respect to the base 600,

As shown in fig. 3, 4 and 5, in some possible embodiments of the present utility model, the horizontal movement mechanism 700 further includes a moving platform 780 connected to the first transmission device 720 and the exposure device 200, so that the first driving portion 710 can drive the moving platform 780 to move through the first transmission device 720, and further drive the exposure device 200 connected to the moving platform 780 to move synchronously. Wherein the carrying portion 220 of the exposure apparatus 200 may be connected to the moving stage 780.

In the above embodiment, the base 600 is provided with the first guide portion, the moving platform 780 is provided with the second guide portion, and the first guide portion and the second guide portion are matched to limit the movement of the exposure apparatus 200 relative to the base 600, so that the movement accuracy and the smoothness of the movement of the exposure apparatus 200 relative to the base 600 can be improved, so as to improve the exposure efficiency and the printing efficiency.

As shown in fig. 3, 4 and 5, in a specific example, the first guiding portion includes a guide rail 610, the second guiding portion includes a chute, for example, the guide rail 610 is fixed on the base 600, the chute is opened at the bottom of the moving platform 780, and the chute is erected on the guide rail 610, so, when the first driving portion 710 drives the moving platform 780 to move along the horizontal direction relative to the base 600 through the first transmission device 720, the first driving portion drives the exposure device 200 connected to the moving platform 780 to move synchronously, and the chute moves along the guide rail 610, so that the situation that the moving platform 780 is deviated relative to the base 600 can be avoided, so as to ensure the accuracy of the movement of the exposure device 200 relative to the base 600, and ensure that the exposure device 200 can expose the first release film 110 accurately and completely. It is understood that the guiding structure of the guide rail runner may be used in combination with the mechanism of the first transmission 720 being a screw nut.

As shown in fig. 2 and fig. 7 to fig. 10, in another specific example, the first guiding portion includes a guiding groove 620, the second guiding portion includes a guiding wheel 782, for example, the base 600 is provided with the guiding groove 620, the moving platform 780 is connected with the guiding wheel 782, the guiding wheel 782 can slide along the guiding groove 620, so, when the first driving portion 710 drives the moving platform 780 to move along the horizontal direction relative to the base 600 through the first transmission device 720, the first driving portion drives the exposing device 200 connected to the moving platform 780 to synchronously move, and the guiding wheel 782 slides along the guiding groove 620, so that the situation that the moving platform 780 deviates relative to the base 600 can be avoided, so as to ensure the moving accuracy of the exposing device 200 relative to the base 600, so as to ensure that the exposing device 200 can accurately and completely expose the first release film 110. It will be appreciated that the guide grooves 620 and the guide structure of the guide wheel may be used in conjunction with the mechanism in which the first transmission 720 is a timing belt 770.

Specifically, the opening direction of the guide groove 620 may be upward or may be oriented in a horizontal direction, and when the opening direction of the guide groove 620 is upward, the guide groove 620 may be directly opened on the base 600, or a support seat may be mounted on the base 600, and the guide groove 620 with the opening upward may be opened on the support seat. When the opening direction of the guide groove 620 is the horizontal direction, a supporting seat is installed on the base 600, and the guide groove 620 with an opening facing the horizontal direction is opened on the supporting seat.

In some possible embodiments provided by the present utility model, as shown in fig. 6, the stereolithography apparatus further includes: the retractable dust cover 910, the first end of the retractable dust cover 910 is connected to the base 600, and is disposed around the light-transmitting portion, the second end of the retractable dust cover 910 is connected to the carrying portion 220, and is disposed around the exposure screen 210, and the second end is configured to be movable with respect to the first end in the direction in which the exposure apparatus 200 moves with respect to the base 600. From this, make scalable dust cover 910 can not shelter from exposure screen 210, and can shelter from the space between printing opacity portion and the exposure screen 210, promptly utilize scalable dust cover 910, can play good dustproof and effect of shielding, can avoid the user to see the inside of product through printing opacity portion, improved the aesthetic property of product outward appearance, simultaneously, played good dustproof effect, be favorable to improving the inside cleanability of base 600, improve the inside life of automatically controlled product of base 600.

As shown in fig. 7, in some possible embodiments provided by the present utility model, the stereolithography apparatus further includes: the top open-ended shield 920, shield 920 is established in the outside of exposure device 200 by the bottom cover of exposure device 200, and the top and the base 600 of shield 920 are connected, and the light-passing part is located the opening, and dodge hole 921 that extends along the direction of movement of exposure device 200 is seted up to the bottom of shield 920, and exposure device 200 passes dodge hole 921 and is connected with moving platform 780 and can follow dodge hole 921 and remove.

Accordingly, the first driving part 710 drives the moving platform 780 to move along the horizontal direction through the first transmission device 720, so as to drive the exposure device 200 to move along the avoidance hole 921, so as to implement the exposure operation on the first release film 110. Wherein, shield cover 920's setting can not shelter from exposure screen 210 and printing opacity portion, and enclose exposure device 200 in shield cover 920, play good shielding effect, make through printing opacity portion can only see exposure device 200, can not see the inside other structures of base 600, be favorable to improving the observability of product, simultaneously, shield cover 920's setting, dustproof effect has been played, the dust of external environment can fall into shield cover 920 through printing opacity portion promptly, can't pollute the other structures that are located outside shield cover 920 in the base 600, be favorable to improving the life and the reliability of the other structures that are located outside shield cover 920 in the base 600. It is understood that other structures in the base 600 outside the dust cover 920 may be the first transmission device 720, the electric control part, etc.

In the above embodiment, the sealing member 930 is disposed in the avoidance hole 921, and the sealing member 930 is used to seal the gap of the avoidance hole 921, so as to achieve good shielding and dust-proof effects. The exposure device 200 is arranged on the sealing member 930 in a penetrating manner and is movable relative to the sealing member 930, so that the exposure device 200 can move smoothly along the avoidance hole 921 under the driving of the moving platform 780.

Wherein, sealing member 930 can be brush strip, adhesive tape etc. take sealing member 930 as the brush strip for example, and the brush strip sets up along the extending direction of dodging hole 921 and shelters from dodging hole 921 as far as possible with the brush that utilizes the brush strip, and the bottom of the loading part 220 of exposure device 200 is provided with fixed part 221, and the brush on the fixed part 221 passes the brush strip is connected with moving platform 780, can ensure moving platform 780 and remove, drives exposure device 200 along dodging hole 921 synchronous motion.

As shown in fig. 8 and 9, in some possible embodiments of the present utility model, the stereo lithography apparatus further includes a dust cover 920 with an open top, the dust cover 920 is sleeved outside the exposure device 200 from the bottom of the exposure device 200, the top of the dust cover 920 is connected to the base 600, the sidewall of the dust cover 920 is provided with a dodging hole 921 extending along the moving direction of the exposure device 200, and the moving platform 780 passes through the dodging hole 921 to be connected to the exposure device 200 and can move along the dodging hole 921.

Accordingly, the first driving part 710 drives the moving platform 780 to move along the horizontal direction through the first transmission device 720, so as to drive the exposure device 200 to move along the avoidance hole 921, so as to implement the exposure operation on the first release film 110. Wherein, shield cover 920's setting can not shelter from exposure screen 210 and printing opacity portion, and enclose exposure device 200 in shield cover 920, play good shielding effect, make through printing opacity portion can only see exposure device 200, can not see the inside other structures of base 600, be favorable to improving the observability of product, simultaneously, shield cover 920's setting, dustproof effect has been played, the dust of external environment falls into shield cover 920 through the printing opacity portion in promptly, also can't pollute the other structures that lie in outside shield cover 920 in the base 600, be favorable to improving the life and the reliability of the other structures that lie in outside shield cover 920 in the base 600. In addition, since the avoidance hole 921 is formed in the side portion of the dust cover 920, the bottom of the dust cover 920 is completely sealed, and even if the cured resin is inadvertently sprinkled on the exposure screen 210, the cured resin can be collected in the dust cover 920 and cannot fall out of the dust cover 920 in the base 600, so that the service life and reliability of other structures located outside the dust cover 920 in the base 600 are further improved. It is understood that other structures in the base 600 outside the dust cover 920 may be the first transmission device 720, the electric control part, etc.

In the above embodiment, the sealing member 930 is disposed in the avoidance hole 921, and the sealing member 930 is used to seal the gap of the avoidance hole 921, so as to achieve good shielding and dust-proof effects. The moving platform 780 is arranged through the sealing member 930 in a penetrating manner and is movable relative to the sealing member 930, so that the exposure device 200 can move smoothly along the avoidance hole 921 under the driving of the moving platform 780.

Wherein, sealing member 930 can be brush strip, adhesive tape etc. take sealing member 930 as the brush strip for example, and the brush strip sets up along the extending direction who dodges hole 921 and dodges hole 921 in order to utilize the brush of brush strip as far as possible, and the brush on the brush strip is passed at the top of moving platform 780 is connected with the loading part 220 of exposure device 200, can ensure that moving platform 780 removes, drives exposure device 200 and dodges hole 921 synchronous motion.

As shown in fig. 10, in some possible embodiments of the present utility model, the exposure apparatus 200 further includes a second release film 240, the movable apparatus 230 includes four rollers distributed at corners of the carrying portion 220, the second release film 240 is sleeved outside the four rollers and is vertically looped around the carrying portion 220, the exposure screen 210 is located inside the second release film 240, and two rollers located above are abutted against the first release film 110; the exposure device 200 moves along a horizontal direction, and the movable device 230 is configured to drive the second release film 240 to move around the carrying portion 220.

The four rollers include two rollers located at the top of the bearing portion 220 and two rollers located at the bottom of the bearing portion 220, the second release film 240 is sleeved outside the four rollers and is annularly located at the bearing portion 220 along the vertical direction, the two rollers located above are abutted to the first release film 110, and when the exposure device 200 moves along the horizontal direction, the four rollers drive the second release film 240 to move around the bearing portion 220, thereby being beneficial to improving the smoothness of the movement of the exposure device 200 relative to the first release film 110. Meanwhile, since the exposure screen 210 is located inside the second release film 240, the second release film 240 is sleeved outside the four rollers, so that part of the second release film 240 can be in contact with the first release film 110, the exposure screen 210 can be prevented from being in direct contact with the first release film 110, the arrangement of the second release film 240 is beneficial to improving the elasticity of the first release film 110 and reducing the plastic deformation of the first release film 110.

The application also provides the following embodiments:

embodiment 1, a stereolithography apparatus, comprising:

A trough 100 including a first release film 110 at the bottom;

An exposure device 200, the exposure device 200 being located below the trough 100, the exposure device 200 being configured to be movable in a horizontal direction with respect to the trough 100; during the movement, the exposure device 200 contacts the first release film 110 to drive at least a portion of the first release film 110 to deform;

A first detection device 300, disposed on the exposure device 200, the first detection device 300 being configured to detect a first detection value for characterizing a stress of the exposure device 200;

And the control device is connected with the first detection device 300 to judge whether the stress condition of the exposure device 200 is normal according to the first detection value.

Embodiment 2, the stereolithography apparatus according to embodiment 1, further comprising:

A shaping platen 400 and a second detection device 500, the shaping platen 400 being configured to be movable toward and away from the trough 100, the second detection device 500 being configured to detect a second detection value indicative of a force applied by the shaping platen 400;

The control device is further connected to the second detecting device 500 to determine whether the operation of the stereoscopic shaping apparatus is normal according to the detection information of the first detecting device 300 and the second detecting device 500.

Example 3 the stereolithography apparatus according to example 2,

The exposure device 200 further comprises a bearing part 220 and a movable device 230, the exposure screen 210 is connected to the top of the bearing part 220, and the movable device 230 is movably connected with the bearing part 220 and is abutted to the first release film 110;

The first detecting device 300 includes a first strain gauge, a first strain hole 222 is formed in the bearing portion 220, the first strain hole 222 penetrates through the bearing portion 220 along a horizontal direction, and the first strain gauge is connected to an outer side of the bearing portion 220 and is opposite to a thin wall of the first strain hole 222.

Example 4 the stereolithography apparatus according to example 3,

The first strain holes 222 are elongated holes arranged in the vertical direction; alternatively, the first strain hole 222 includes a plurality of circular through holes arranged in the vertical direction, the plurality of circular through holes being communicated; or, the first strained hole 222 includes a plurality of circular through holes arranged in an array, and the plurality of circular through holes are communicated;

The thin wall of the first strained hole 222 is located at the side of the bearing part 220, and the wall thickness of the thin wall of the first strained hole 222 is 0.5mm to 10mm.

Embodiment 5, the stereolithography apparatus according to embodiment 3, further comprising:

the horizontal motion mechanism 700 is connected with the exposure device 200 to drive the exposure device 200 to move along the horizontal direction, and exposure light is projected to the trough 100 through the exposure screen 210 and the light transmission part;

The horizontal movement mechanism 700 includes a first driving part 710 and a first transmission device 720, and the first driving part 710 and the bearing part 220 are in transmission connection through the first transmission device 720.

Embodiment 6, the stereolithography apparatus according to embodiment 5, further comprising:

The vertical movement mechanism 800 and the connecting arm 410, wherein the vertical movement mechanism 800 is arranged on the base 600, and the vertical movement mechanism 800 is connected with the forming platform 400 through the connecting arm 410 so as to drive the forming platform 400 to approach or separate from the trough 100 along the vertical direction;

The second detecting device 500 includes a second strain gauge, a second strain hole 411 is formed in the connecting arm 410, the second strain hole 411 penetrates the connecting arm 410 along a horizontal direction, and the second strain gauge is connected to the outer side of the connecting arm 410 and is opposite to the thin wall of the second strain hole 411.

Example 7 the stereolithography apparatus according to example 6,

The thin wall of the second strain hole 411 is located at the top and/or bottom of the connection arm 410, and the wall thickness of the thin wall of the second strain hole 411 is 0.5mm to 10mm.

Example 8 the stereolithography apparatus according to example 6,

The length of the effective printing area of the release film 110 along the first direction is a first length, the length of the effective printing area of the release film 110 along the second direction is a second length, the first direction is perpendicular to the second direction, and the first direction and the second direction are both directions parallel to the horizontal plane; the first driving part 710 is used for driving the exposure device 200 to horizontally move along the first direction or the second direction; the vertical movement mechanism 800 includes a second driving part 810 located in the base 600; wherein:

In the case where the first driving part 710 drives the exposure device 200 to move horizontally along the first direction, the first driving part 710 and the second driving part 810 are staggered in the horizontal plane projection, and the length of the light emitting surface along the first direction when the light emitted from the exposure device 200 reaches the trough 100 is a third length, which is smaller than the first length;

Or in the case that the exposure device 200 moves horizontally along the second direction, the first driving portion 710 and the second driving portion 810 are at least partially overlapped on a horizontal plane projection, and a length of the light emitting surface along the second direction when the light emitted by the exposure device 200 reaches the trough 100 is a fourth length, where the fourth length is smaller than the second length.

Example 9 the stereolithography apparatus according to example 5,

The first transmission device 720 includes a screw 730 and a guide nut 740 in threaded connection, the guide nut 740 is connected to the bearing portion 220, and the first driving portion 710 is used for driving the screw 730 to rotate, so that the screw 730 and the guide nut 740 relatively move to drive the exposure device 200 to move relative to the base 600.

Example 10 the stereolithography apparatus according to example 9,

The first driving part 710 is disposed along the axis of the screw 730; or alternatively

The first driving part 710 is disposed along a radial direction of the screw 730, the first driving part 710 and the screw 730 are in driving connection by a second driving device 750, and the second driving device 750 includes a driving belt or a driving gear.

Example 11 the stereolithography apparatus according to example 5,

The first transmission device 720 includes a driving wheel 760, a driven wheel 790, and a timing belt 770, wherein the driving wheel 760 is connected with the first driving part 710, the driven wheel 790 is fixed on the base 600, the timing belt 770 is sleeved on the driving wheel 760 and the driven wheel 790, and the bearing part 220 is connected to the timing belt 770.

Example 12 the stereolithography apparatus according to example 5,

The base 600 is provided with a first guiding part, the horizontal movement mechanism 700 further comprises a moving platform 780 connected with the first transmission device 720 and the exposure device 200, the moving platform 780 is provided with a second guiding part, and the first guiding part and the second guiding part are matched to limit the movement of the exposure device 200 relative to the base 600;

Wherein the first guide part comprises a guide rail 610 and the second guide part comprises a chute; or alternatively

The first guide part includes a guide groove 620 and the second guide part includes a guide wheel 782.

Embodiment 13, the stereolithography apparatus according to embodiment 5, further comprising:

The retractable dust cover 910, the first end of the retractable dust cover 910 is connected to the base 600, and is disposed around the light-transmitting portion, the second end of the retractable dust cover 910 is connected to the carrying portion 220, and is disposed around the exposure screen 210, and the second end is configured to be movable with respect to the first end in the direction in which the exposure apparatus 200 moves with respect to the base 600.

Embodiment 14, the stereolithography apparatus according to embodiment 12, further comprising:

The dust cover 920 with the top opening is sleeved outside the exposure device 200 from the bottom of the exposure device 200, the top of the dust cover 920 is connected with the base 600, the light transmission part is positioned in the opening, the bottom of the dust cover 920 is provided with an avoidance hole 921 extending along the moving direction of the exposure device 200, and the exposure device 200 passes through the avoidance hole 921 to be connected with the moving platform 780 and can move along the avoidance hole 921;

wherein, dodging hole 921 is provided with sealing member 930, and exposure device 200 is disposed through sealing member 930 and movable relative to sealing member 930.

Embodiment 15, the stereolithography apparatus according to embodiment 12, further comprising:

The dust cover 920 with the top opening is sleeved outside the exposure device 200 from the bottom of the exposure device 200, the top of the dust cover 920 is connected with the base 600, the side part of the dust cover 920 is provided with an avoidance hole 921 extending along the moving direction of the exposure device 200, and the moving platform 780 passes through the avoidance hole 921 to be connected with the exposure device 200 and can move along the avoidance hole 921;

Wherein, dodge hole 921 is provided with sealing member 930 therein, and moving platform 780 is disposed through sealing member 930 and movable relative to sealing member 930.

Example 16 the stereolithography apparatus according to example 5,

The exposure device 200 further comprises a second release film 240, the movable device 230 comprises four rollers distributed at the corners of the bearing part 220, the second release film 240 is sleeved outside the four rollers and is annularly arranged at the bearing part 220 along the vertical direction, the exposure screen 210 is positioned inside the second release film 240, and the two rollers positioned above are abutted with the first release film 110;

The exposure device 200 moves along a horizontal direction, and the movable device 230 is configured to drive the second release film 240 to move around the carrying portion 220.

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 trough comprises a first release film positioned at the bottom;

An exposure device located below the trough, the exposure device being configured to be movable in a horizontal direction with respect to the trough; during the moving process, the exposure device is contacted with the first release film to drive at least one part of the first release film to deform;

The first detection device is arranged on the exposure device and is used for detecting a first detection value used for representing the stress of the exposure device;

and the control device is connected with the first detection device to judge whether the stress condition of the exposure device is normal or not according to the first detection value.

2. The stereolithography apparatus according to claim 1, further comprising:

A forming platform and a second detection device, wherein the forming platform is configured to be close to or far away from the trough, and the second detection device is used for detecting a second detection value used for representing the stress of the forming platform;

The control device is also connected with the second detection device, so as to judge whether the running condition of the three-dimensional forming equipment is normal or not according to the detection information of the first detection device and the second detection device.

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

The exposure device further comprises a bearing part and a movable device, the exposure device is connected to the top of the bearing part, and the movable device is movably connected with the bearing part and is abutted to the first release film;

The first detection device comprises a first strain gauge, a first strain hole is formed in the bearing part, the first strain hole penetrates through the bearing part along the horizontal direction, and the first strain gauge is connected to the outer side of the bearing part and opposite to the thin wall of the first strain hole.

4. The stereolithography apparatus as claimed in claim 3, wherein,

The first strain holes are strip holes arranged along the vertical direction; or, the first strain hole comprises a plurality of circular through holes arranged along the vertical direction, and the circular through holes are communicated; or, the first strain hole comprises a plurality of circular through holes arranged in an array, and the circular through holes are communicated;

the thin wall of the first strain hole is positioned on the side face of the bearing part, and the wall thickness of the thin wall of the first strain hole is 0.5mm to 10mm.

5. The stereolithography apparatus as recited in claim 3, further comprising:

The device comprises a base and a horizontal movement mechanism, wherein a light transmission part is arranged at the top of the base, the trough is positioned at the light transmission part, the horizontal movement mechanism and the exposure device are both arranged in the base, the horizontal movement mechanism is connected with the exposure device to drive the exposure device to move along the horizontal direction, and exposure light of the exposure device is projected to the trough through an exposure screen and the light transmission part;

The horizontal movement mechanism comprises a first driving part and a first transmission device, and the first driving part is in transmission connection with the bearing part through the first transmission device.

6. The stereolithography apparatus according to claim 5, further comprising:

The vertical movement mechanism is arranged on the base, and is connected with the forming platform through the connecting arm so as to drive the forming platform to approach or depart from the trough along the vertical direction;

The second detection device comprises a second strain gauge, a second strain hole is formed in the connecting arm, the second strain hole penetrates through the connecting arm in the horizontal direction, and the second strain gauge is connected to the outer side of the connecting arm and opposite to the thin wall of the second strain hole.

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

The thin wall of the second strain hole is positioned at the top and/or the bottom of the connecting arm, and the wall thickness of the thin wall of the second strain hole is 0.5mm to 10mm.

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

The length of the effective printing area of the release film along a first direction is a first length, the length of the effective printing area of the release film along a second direction is a second length, the first direction is perpendicular to the second direction, and the first direction and the second direction are both directions parallel to a horizontal plane; the first driving part is used for driving the exposure device to horizontally move along the first direction or the second direction; the vertical movement mechanism comprises a second driving part positioned in the base; wherein:

Under the condition that the first driving part drives the exposure device to horizontally move along the first direction, the first driving part and the second driving part are arranged in a staggered mode on horizontal projection, the length of a light emergent surface when light emitted by the exposure device reaches the trough along the first direction is a third length, and the third length is smaller than the first length;

Or under the condition that the exposure device horizontally moves along the second direction, the first driving part and the second driving part are at least partially overlapped on the horizontal plane projection, the length of the light emergent surface along the second direction when the light emitted by the exposure device reaches the trough is a fourth length, and the fourth length is smaller than the second length.

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

The first transmission device comprises a screw rod and a guide nut which are in threaded connection, the guide nut is connected with the bearing part, and the first driving part is used for driving the screw rod to rotate so that the screw rod and the guide nut relatively move to drive the exposure device to move relative to the base.

10. The stereolithography apparatus as claimed in claim 9, wherein,

The first driving part is arranged along the axis of the screw rod; or alternatively

The first driving part is arranged along the radial direction of the screw rod, the first driving part is in transmission connection with the screw rod through a second transmission device, and the second transmission device comprises a transmission belt or a transmission gear.

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

The first transmission device comprises a driving wheel, a driven wheel and a synchronous belt, wherein the driving wheel is connected with the first driving part, the driven wheel is fixed on the base, the synchronous belt is sleeved on the driving wheel and the driven wheel, and the bearing part is connected on the synchronous belt.

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

The base is provided with a first guide part, the horizontal movement mechanism further comprises a moving platform connected with the first transmission device and the exposure device, the moving platform is provided with a second guide part, and the first guide part and the second guide part are matched to limit the movement of the exposure device relative to the base;

Wherein the first guide part comprises a guide rail, and the second guide part comprises a chute; or alternatively

The first guide part comprises a guide groove, and the second guide part comprises a guide wheel.

13. The stereolithography apparatus according to claim 5, further comprising:

The first end of the telescopic dust cover is connected with the base, the first end of the telescopic dust cover is arranged on the periphery of the light transmission part in a surrounding mode, the second end of the telescopic dust cover is connected with the bearing part, the second end of the telescopic dust cover is arranged on the periphery of the exposure screen in a surrounding mode, and in the moving direction of the exposure device relative to the base, the second end of the telescopic dust cover is arranged to be movable relative to the first end.

14. The stereolithography apparatus according to claim 12, further comprising:

The bottom of the dust cover is provided with an avoidance hole extending along the moving direction of the exposure device, and the exposure device passes through the avoidance hole, is connected with the moving platform and can move along the avoidance hole;

the exposure device is arranged in the avoidance hole in a penetrating mode, and the exposure device penetrates through the sealing element and is movable relative to the sealing element.

15. The stereolithography apparatus according to claim 12, further comprising:

The dustproof cover with the top opening is sleeved outside the exposure device from the bottom of the exposure device, the top of the dustproof cover is connected with the base, the side part of the dustproof cover is provided with an avoidance hole extending along the moving direction of the exposure device, and the movable platform passes through the avoidance hole, is connected with the exposure device and can move along the avoidance hole;

The movable platform penetrates through the sealing piece and is movable relative to the sealing piece.

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

The exposure device further comprises a second release film, the movable device comprises four rollers distributed at corners of the bearing part, the second release film is sleeved outside the four rollers and is annularly arranged at the bearing part along the vertical direction, the exposure screen is positioned inside the second release film, and the two rollers positioned above are abutted with the first release film;

The exposure device moves along the horizontal direction, and the movable device is configured to drive the second release film to move around the bearing part.