CN112339267A

CN112339267A - LCD photocuring 3D printer

Info

Publication number: CN112339267A
Application number: CN201910633968.0A
Authority: CN
Inventors: 许晗; 杜秋; 梁涵钧
Original assignee: Shanghai Huanjia Information Technology Co ltd
Current assignee: Shanghai Huanjia Information Technology Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2021-02-09

Abstract

The application discloses LCD photocuring 3D printer includes: a frame for housing a printer assembly; the stripping system is used for stripping the printed product from the forming platform; a forming platform used as a forming plane of a printed product; an LCD display screen for receiving the 3D component model; the box body is used for loading the light source system and the computer control system; the light source system is used for generating illumination and irradiating the layered image in the model to the bottom surface of the forming platform so as to solidify the light-cured material into a corresponding pattern solidified layer; a computer control system for controlling operation of the printer; a trough for storing the photocurable material; and the lifting device is used for adjusting the distance between the stripping system and the trough. The 3D printer that this application disclosed has that the printing precision is high, fast, print advantages such as the size is big and long service life.

Description

LCD photocuring 3D printer

Technical Field

The invention relates to the field of additive manufacturing, in particular to an LCD photocuring 3D printer.

Background

The Rapid Prototyping Manufacturing technology (also called 3D printing technology) manufactures an entity in a layer-by-layer overlapping manner through a Prototyping device according to three-dimensional model data of an object, and can overcome special structural obstacles that cannot be realized by the conventional machining at present and realize simplified production of any complex structural component.

In the 3D printing technology, a photo-curing rapid prototyping technology is common, in which a photo-sensitive resin (UV) in a liquid state is used to perform a polymerization reaction under illumination, and a light source irradiates the photo-sensitive resin according to a cross-sectional shape of an entity to be cured, so that the liquid photo-sensitive resin is cured layer by layer and then accumulated and superimposed to finally form a cured entity.

The existing photocuring printing technology is divided into three types, namely laser three-dimensional printing technology SLA (laser point light source curing), DLP (projector surface light source curing) and LCD (liquid crystal display surface photocuring). The SLA technology has the advantages of high forming precision, but because the forming mode is laser point forming, compared with surface forming, the forming speed is low and the forming efficiency is low. The DLP technology has the advantages of high light source utilization rate and high curing and forming speed. But the defects are also obvious, namely the service life of the optical machine is short, the curing molding area is small, and the molding of large-size objects is not facilitated. If the operation of enlarging the image using the mirror is performed, the pixels are unevenly distributed, and the molding accuracy is finally deteriorated.

The LCD technology solves the problems to a certain extent, and compared with the SLA technology, the LCD technology can be molded at a higher speed, and compared with the DLP technology, the LCD technology has higher molding precision. However, the LCD technology has its disadvantages, and the LCD technology in the prior art is not large in size of the molded product, which is not suitable for industrial application. In addition, the LCD light source has strong heat radiation, which may overheat the screen for a long time, affecting its service life. In addition, most LCD technologies use a single point light source, the light is divergent, the light is irradiated to the photosensitive resin via the light guide assembly, the polarizing film, the liquid crystal panel, and the trough bottom film for molding, and the utilization rate of the light source is not high.

Disclosure of Invention

In view of the above disadvantages of the related art, an object of the present application is to disclose an LCD photocuring 3D printer, which is used to solve the problems of short service life of a light source and an LCD display screen, low utilization rate of the light source, small size of a printed image, and the like in the prior art.

In order to achieve the above object, the present application discloses an LCD photocuring 3D printer, including: a frame for housing a printer assembly; the stripping system is used for stripping the printed product from the forming platform; a forming platform used as a forming plane of a printed product; an LCD display screen for receiving the 3D component model; the box body is used for loading the light source system and the computer control system; the light source system is used for generating illumination and irradiating the layered image in the model to the bottom surface of the forming platform so as to solidify the light-cured material into a corresponding pattern solidified layer; a computer control system for controlling operation of the printer; a trough for storing the photocurable material; and the lifting device is used for adjusting the distance between the stripping system and the trough.

The application discloses LCD photocuring 3D printer includes: the device comprises a rack, a stripping system, a forming platform, an LCD display screen, a box body, a light source system, a computer control system, a trough and a lifting device; the lifting device is arranged on the upper half part of the rack, the lifting device is connected with the stripping system and the trough, and the trough is arranged below the stripping system; the forming platform is connected with the stripping system and arranged on the bottom surface of the stripping system; the LCD display screen is arranged at the bottom of the trough; the box body is arranged at the lower half part of the rack and is positioned below the material groove; the box body comprises a shell, a light source system and the computer control system, the computer control system is arranged on the outer wall of the shell, and the light source system is arranged in the shell and below the LCD display screen; the lifting device, the light source system, the peeling system and the LCD display screen are respectively electrically connected with the computer system.

In certain embodiments, the rack comprises a back box; the back box comprises a mesh plate, and the mesh plate is used for installing and fixing components of the printer.

In some embodiments, the LCD photocuring 3D printer further comprises a lift cage; the lifting cover is connected with the rack, is arranged on the upper half part of the rack and is positioned above the stripping system and the parallel table.

In some embodiments, the housing further comprises a light source moving device and a light source fixing device.

The LCD photocuring 3D printer of claim 5, wherein the light source moving device comprises a stepper motor, a motor platform, an optical axis, and a ball screw; the stepping motor is arranged on the motor platform and is connected with the ball screw; the optical axis and the ball screw are connected with the light source system through a screw nut; the stepping motor is linked with the light source system through a ball screw.

In some embodiments, the light source fixture comprises a limit switch and a limit switch fixture; the limit switch is connected with the light source system.

In some embodiments, the light source moving device and the light source fixing device are respectively electrically connected with the computer control system to control the distance between the light source system and the trough.

In some embodiments, the light source system includes a light source for generating illumination, transmitting a light signal; the light source cooling system is used for absorbing heat generated by light illumination of the light source; the light condensing system is used for straightening light; and the light source platform is used for constructing a light source system.

In some embodiments, the light source system further comprises a screw nut disposed on the light source platform; and a ball screw in the box body penetrates through a screw nut on the light source platform to move the light source system and adjust the distance between the light source system and the LCD display screen.

In some embodiments, the light source is an LED lamp bead substrate disposed on the surface of the light source platform.

In some embodiments, the LED lamp bead substrate includes LED lamp beads and a high temperature resistant heat conducting substrate, and the LED lamp beads are regularly arranged on a ceramic substrate.

In some embodiments, the high temperature resistant and heat conductive substrate is an aluminum nitride ceramic substrate or an aluminum oxide ceramic substrate.

In some embodiments, the light source platform is an aluminum base plate.

In some embodiments, the light collection system includes a collection optic for straightening light; a light shielding plate for collecting light and loading the heat sink; an optical axis for constructing a light condensing system; the optical axis is arranged on the light source platform and arranged around the LED lamp bead substrate; the light shading plates are arranged on the periphery of the LED lamp panel and are supported by 4 optical axes; the condensing lens is arranged above the LED lamp bead substrate and is supported by the optical axis and the light screen.

In some embodiments, the condensing lens comprises a quartz glass plate and a fresnel lens; the quartz glass plate and the Fresnel lens are sequentially installed from bottom to top.

In some embodiments, the light source cooling system includes a water tank for storing water-cooled circulating water; the water cooling row is used for absorbing heat generated by the light source; the water cooling head is used for absorbing heat generated by the light source; a heat sink for absorbing heat generated by the light source; the exhaust fan is used for generating heat by the light source; the light source cooling plate is used for absorbing heat generated by the light source; the fixing frame is used for fixing the water tank to the light source platform; and the water pipe is used for connecting the water tank, the water cooling drain and the water cooling head, circulating condensed water is circulated in the parts, and heat generated by the light source is absorbed.

In some embodiments, the water tank is installed on both sides of the light source platform and fixed by a fixing frame; the water cooling rows are arranged on the light shielding plate and positioned on the front side and the rear side of the light source system; the radiating fins are arranged on the shading plate and positioned on the left side and the right side of the light source system; the water cooling head is arranged on the bottom surface of the light source platform and is positioned at the lower side of the light source system; the light source heat dissipation plate is arranged on the light source platform and positioned between the light source platform and the light source heat dissipation plate; the radiating fans are arranged on the water cooling row and are positioned on the front side and the rear side of the light source system.

In some embodiments, the heat sink is a copper heat sink and the light source heat sink is a light source heat sink.

In certain embodiments, the stripping system comprises a motive system for providing motive force to the stripping system; a fixing device for fixing the stripping system; and the firing pin platform is used for bearing the firing pin and driving the firing pin to move.

In some embodiments, the stripping system further comprises a stationary platform for loading the motor to construct the stripping system; the optical axis is used for supporting the firing pin platform, the fixing platform and the forming platform; the screw rod and the screw rod nut are used for linking the motion of the striker platform; and the limiting photoelectric switch is used for regulating and controlling the height of the stripping system from the trough.

In some embodiments, the fixed platform is connected to and secured by a fixture; the power system is arranged on the fixed platform and is connected with the screw rod; the firing pin platform is arranged below the fixed platform, and the optical axis passes through four corners of the firing pin platform and is fixed by the optical axis sliding block; the photoelectric limit switch is arranged on the bottom surface of the fixed platform; the stripping system is fixed on the lifting system through a fixing device.

In certain embodiments, the power system is a stepper motor.

In some embodiments, the striker platform carries a striker for stripping products from the forming table.

In some embodiments, the trough includes a pallet for mounting the trough; the material groove main body is used for storing printing materials; the release film is used for peeling the printed product; the fixing frame is used for fixing the trough main body.

In some embodiments, the trough main body is arranged at the central position of the supporting plate and is fixed by a fixing frame; the release film is arranged on the bottom surface of the trough main body.

In some embodiments, the trough further comprises a trough sleeve mounted around the trough body for removing the trough body and the release film.

In some embodiments, the supporting platform is a hollow structure, wherein the hollow position of the supporting platform is matched with the trough main body and used for installing an LCD display screen; a first quartz glass plate is arranged below the release film, and the release film is attached to the first quartz glass plate; an LCD display screen is arranged below the first quartz glass plate and is attached to the first quartz glass plate; and a second quartz glass plate is arranged below the LCD display screen, and the LCD display screen is attached to the second quartz glass plate.

The LCD photocuring 3D printer that this application provided uses computer control system, and the work of parts such as light source system, stripping system in the control printer can realize automatic printing for print fashioned speed, solved the slow problem of traditional 3D printer printing speed.

In addition, the light source system used in the application comprises a condenser lens, a quartz glass plate and a light shielding plate, so that the effects of gathering light and reducing illumination loss are effectively achieved, and the utilization rate of a light source is improved. Meanwhile, the design can also be used for straightening light, so that the light incident to the LCD display screen is uniform, and the printing progress of a product is improved.

Moreover, the light source system that this application used contains light source cooling system, absorbs effectively and has shifted the heat radiation that produces when illumination, protects light source system and LCD display screen, has prolonged light source system's life.

In addition, the peeling system used by the application can quickly, simply and conveniently peel off the printed and molded product from the molding table without manual peeling work, and compared with a traditional 3D printer, the automatic peeling of the product can be realized, the full automation of 3D printing is realized, and the printing speed of the product is effectively accelerated.

Drawings

Fig. 1 shows a front view of the appearance of the LCD photocuring 3D printer of the present invention.

Fig. 2 is an oblique view of the appearance of the LCD photocuring 3D printer according to the present invention.

Fig. 3 shows an external right view of the LCD photocuring 3D printer of the present invention.

FIG. 4 is a front view of the internal structure of the LCD photocuring 3D printer with the hidden housing and the hidden lifting cover.

FIG. 5 is a perspective view showing the internal structure of the LCD photocuring 3D printer with the hidden housing and the hidden lifting cover.

Fig. 6 shows a back view of the internal structure of an LCD photocuring 3D printer frame of the present invention.

Fig. 7 shows a front view of a light source system of the LCD photocuring 3D printer of the present invention.

Fig. 8 is a perspective view of a light source system of the LCD photocuring 3D printer according to the present invention.

Fig. 9 is a perspective view of a light source system of the LCD photocuring 3D printer according to the present invention.

FIG. 10 is a perspective view of the light source system after the light shielding plate of the LCD light-cured 3D printer is hidden.

FIG. 11 shows a front view of the LCD photocuring 3D printer release system of the present invention assembled with a forming table.

FIG. 12 is a perspective view of the LCD photo-curing 3D printer stripping system of the present invention assembled with a molding platform.

Fig. 13 shows a front view of the chute of the LCD photocuring 3D printer of the present invention.

Fig. 14 shows a perspective view of the chute of the LCD photocuring 3D printer of the present invention.

Fig. 15 is a perspective view of the LCD photocuring 3D printer with the dust cover hidden.

Fig. 16 is a schematic cross-sectional view of a trough of an LCD photocuring 3D printer of the present invention taken perpendicular to the vertical direction of the trough support.

FIG. 17 is a schematic diagram of an LED lamp bead substrate of the LCD photocuring 3D printer light source system according to the invention.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application.

It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so that the present application has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the disclosure of the present application without affecting the efficacy and the achievable purpose of the present application.

Although the terms first, second, etc. may be used herein to describe various elements in some embodiments, these elements should not be limited by these. These terms are only used to distinguish one element from another. For example, the first quartz glass plate may be referred to as the second quartz glass plate, and similarly, the second quartz glass plate may be referred to as the first quartz glass plate, without departing from the scope of the various described embodiments.

Description of reference numerals: 1. a frame; 2. a light source system; 3. a stripping system; 4. a trough; 5. a computer; 6. a Z-axis sliding table; 7. a box body; 8. a lifting cover; 9. a ball screw; 10. an optical axis; 11. a limit switch; 12. a mesh plate; 200. a fixed mount; 201. a visor; 202. water cooling and draining; 203. an exhaust fan; 204. a water tank; 205. a water cooling head; 206. a support plate; 207. a heat sink; 208. an optical axis; 209. a condenser lens; 210. a quartz glass plate; 211. an LED lamp bead substrate; 212. a ceramic substrate; 213, LED lamp beads; 214. a visor; 215. a feed screw nut; 216. a water pipe connector; 300. a forming platform; 301. fixing a bracket; 302. a stepping motor; 303. a motor base; 304. an optical axis; 305. an optical axis slider; 306. a fixed platform; 307. a striker platform; 308. a striker; 309 a fixed support; 310. a limit switch; 311. a screw rod; 312. a feed screw nut; 400. a trough fixing support; 401. a trough supporting plate; 402. a dust cover; 403. a material groove sleeve; 404. a trough main body; 405. a release film; 406. a stepping motor; 407. a quartz glass plate; 408. and an LCD display screen.

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

In the photocuring printing technology of relevant LCD technique, current LCD photocuring 3D printer has that printing speed is slow, the size is little, printer life is short and print the product and peel off scheduling problem hardly. Therefore, it is necessary for those skilled in the art to develop a new type of LCD technology photo-curing 3D printer so as to solve the problems of the related art.

In view of this, the applicant is not limited to the inherent design in the related art, and proposes a printing-peeling integrated LCD photocuring 3D printer by modifying the equipment and adding a new processing device, so as to realize the operation of automatically peeling off the printed product after printing; meanwhile, a light source system of the printer is improved, so that the service life of the printer is greatly prolonged; in addition, the trough is reformed, the replacement of the release film is facilitated, and the automatic printing device has the advantages of simple structure, long service life, high printing speed, high precision and the like.

Referring to fig. 1-3, a front view, an oblique view and a right view of an LCD photocuring 3D printer according to an embodiment of the present application are shown.

As shown in fig. 1-3, the LCD photocuring 3D printer of the present application includes: frame 1, peeling system 3, silo 4, computer 5, box 7 and lift cover 8.

Wherein the box 7 comprises a housing, a light source system 2 and a computer control system.

The trough 4 has a transparent bottom for holding the photocurable material. The photocurable material includes any liquid material susceptible to photocuring, examples of which include: a photocurable resin liquid, or a resin liquid doped with a mixed material such as an additive, a pigment, or a dye. The trough can be transparent as a whole or only the trough bottom is transparent, and a transparent flexible film convenient to peel is laid on the bottom surface of the trough, namely a release film.

The stripping system 3 is positioned above the trough 4, and the stripping system 3 is electrically connected with the computer control system, and the stripping system 3 can adjust the distance between the stripping system 3 and the trough 4 under the control of the computer control system. The stripping system is used for automatically stripping the printed and molded product, namely, the stripping system carries the molded product to leave the material groove under the control of the computer system after the curing and molding of the product are finished, and the stripping program is automatically operated to strip the molded product from the molding table.

The lifting cover 8 is positioned above the stripping system 3, is arranged at the upper half part of the frame 1, and is used for preventing dust and absorbing peculiar smell generated in the printing and forming process. In the printing and forming process of the printer, if the upper part of the printer contacts with air, dust in the air is possibly adsorbed on the surface of a formed product, and the quality of the image formed product is improved, so that the lifting cover 8 is additionally arranged above the upper half part of the printer and the stripping system 3 and used for preventing the dust in the air above the forming table from being adsorbed on the formed product. In addition, the material used for the photocuring 3D printing is photocuring resin liquid and the like, the material has special smell, the smell can be generated in the printing process, and the lifting cover 8 can absorb the smell at the same time to optimize the working environment.

And the box body 7 is positioned below the trough 4, is arranged at the lower half part of the rack 1 and is used for loading other working components.

The computer control system is mounted within a cabinet 7, wherein a computer 5 is mounted outside the housing of the cabinet 7. The computer control system can control the LCD photocuring 3D printer described in the present application, including the operation of each part in the printer, wherein the computer 5 can set the operating parameters of each part in the printer, examples of which include: the distance between the stripping system 3 and the trough 4, the exposure time of the light source system, and the like.

Please refer to fig. 6, which illustrates a rear view of the LCD photocuring 3D printer with the back plate of the back box of the chassis 1 hidden in the embodiment of the present application.

As shown in fig. 6, a rack 1 of the LCD photocuring 3D printer of the present application includes a back box, and the back box includes a mesh plate, and the mesh plate is used for installing components of the LCD photocuring 3D printer, examples of which include: a Z-axis sliding table 6, a box body 7 and the like.

Referring to fig. 4-5, a front view and a perspective view at an angle of the LCD photocuring 3D printer in an embodiment of the present application are shown.

As shown in fig. 5, the housing 7 of the LCD photocuring 3D printer of the present application includes a light source system 2 and a computer control system, wherein the computer control system includes a computer 5; the light source system 2 is installed below the trough 4.

The box body 7 also comprises a light source moving system and a light source fixing system.

The light source moving system comprises an optical axis 10, a ball screw 9 and a screw nut; the screw nut is installed on the light source system 2, the optical axes 10 are located at four corners of the light source system 2, the ball screws 9 are located at the left side and the right side of the light source system 2, and the optical axes and the screws are vertically installed inside the box body and penetrate through the screw nut to be connected with the light source system. Under driving system's control, the lead screw can be followed clockwise or anticlockwise and rotated, because the screw thread in the screw-nut of installation on the light source system cooperatees with screw-nut, so screw-nut can drive screw-nut and remove when the pivoted, and screw-nut connects whole light source system 2, consequently light source system 2 can reciprocate along the optical axis along with the rotation of lead screw, adjust the distance between light source system 2 and the silo bottom, realize the control to illumination intensity from this, and then the precision of control printing, and the thickness of shaping object.

The light source fixing system comprises a limit switch and a limit switch fixing frame, wherein the limit switch is installed on the front face of the back box, is positioned at the front end of the back box and is connected with the supporting plate of the light source system 2. The distance between the light source system 2 and the trough 4 is adjusted by moving the light source system 2 up and down along the optical axis 10 in parallel, and after the position is adjusted, the limit switch 11 is started to fix the light source system 2, so that the distance between the light source system 2 and the trough 4 can be kept unchanged.

The light source system 2 is electrically connected with the computer control system, the parameters of the distance between the light source and the trough can be adjusted in the computer 5, the computer 5 transmits the parameter signals to the computer control system, and the computer control system can automatically adjust the height of the light source system 2 according to the parameters.

As shown in fig. 5, the LCD photocuring 3D printer further includes a Z-axis sliding table 6, which is installed on the back box 7 and located at the upper half portion of the back box 7, and the peeling system 3 is connected with the Z-axis sliding table 6. After printing, the product is formed on the forming table, the stripping system 3 can drive the forming table to move upwards along the Z axis, the formed product is taken away from the trough, the stripping system 3 starts to work after the formed product is moved upwards for a certain distance, the formed product is stripped from the forming table quickly, and the printing speed is accelerated.

Referring to fig. 7, a front view of the light source system 2 of the LCD photocuring 3D printer is shown.

As shown in fig. 7, the light source system 2 includes a light shielding plate 201, a water cooling row 202, an exhaust fan 203, a water tank 204, a water cooling head 205, a light shielding plate 214, and a water cooling interface 216.

Please refer to fig. 8, which is a perspective view of the light source system 2 of the LCD light-curing 3D printer at an angle.

As shown in fig. 8, the light source system 2 further includes a fixing frame 200, a supporting plate 206, a heat sink 207, and an optical axis 208.

Referring to fig. 7-8, the light source system 2 is based on a support plate 206, and the rest of the components are directly or indirectly connected to the support plate 206. The water tank 204 is installed at the left and right sides of the light source system and connected with the fixing frame 200; the fixing frame 200 is arranged on the bottom surface of the supporting plate 206 and is positioned on the left side and the right side of the supporting plate 206; the number of the water cooling heads 205 is 4, and the number of the water cooling heads 205 is 4; the number of the optical axes 208 may be 4, and the optical axes 208 are mounted on the upper surface of the supporting plate 206, and the optical axes 208 are respectively located near four corners of the supporting plate 206 to form a rectangle; the light shielding plate 214 is connected with the optical axis 208, is installed between the two optical axes 208, and is located on the front surface, the left side surface, the right side surface and the back surface of a space formed by the four optical axes; the water cooling row 202 is tightly attached to the light shielding plate 214 and is arranged on the front surface and the back surface of the light source system 2; the heat sink 207 is closely attached to the light shielding plate 214 and is mounted on the left and right sides of the light source system 2; the exhaust fan 203 is tightly attached to the water cooling bar 202 and is arranged on the front and the back of the light source system 2; the water cooling connector 216 is installed on the water cooling bar 202, the water cooling connector 216 can be connected to a water pipe, and the other side of the water pipe is connected to the water volume, so that the water tank 204 and the water cooling bar 202 are connected to each other.

The light source system 2 is electrically connected with the computer control system, after the computer system starts the light source system, the light source and the light source cooling system in the light source system 2 start to work, wherein cooling water in the water tank 204 is led into the water cooling discharge 202 through a water pipe, hot water is discharged from the water pipe to enter the water tank after absorbing heat, and the hot water is cooled by the water in the water tank 204 and then enters the water cooling discharge 202 for circulation; and meanwhile, the exhaust fan starts to work, and the heat generated by the light source system 2 is exhausted in an exhaust mode.

The optical axis 8 and the light shielding plate 214 in the light source system 2 are used for building a light source platform.

Please refer to fig. 9, which is a perspective view of the light source system 2 of the LCD light-curing 3D printer at an angle.

As shown in fig. 9, the light source system 2 further includes a lead screw nut 215.

As shown in fig. 5 and 9, the lead screw nut 215 can be penetrated by the ball screw 9, and the light source system 2 can move up and down along the optical axis 10 under the driving of the ball screw 9.

Please refer to fig. 10, which is a perspective view of the light source system 2 of the LCD light-curing 3D printer at an angle.

As shown in fig. 10, the light source system 2 further includes a condensing lens 9, a quartz glass plate 10, and an LED lamp bead substrate 11. The LED lamp bead substrate 11 is tightly attached to the upper surface of the supporting plate 206 and is arranged in the center of the supporting plate; the quartz glass plate 10 is arranged above the LED lamp bead substrate 11, and four corners of the quartz glass plate 10 are connected and fixed with the optical axis 208; the condenser lens 9 is mounted above the quartz glass plate 10, and four corners of the condenser lens 9 are connected to and fixed to the optical axis 208.

Please refer to fig. 17, which is a front view of the LED lamp bead substrate.

As shown in fig. 17, the LED lamp bead substrate includes a ceramic substrate 212 and an LED lamp bead 213.

After the computer control system starts the light source system 2, the LED lamp bead substrate starts to work, the LED lamp beads generate illumination, a large amount of heat radiation can be generated while the illumination is generated, the ceramic substrate 212 is made of heat-resistant materials such as aluminum nitride or aluminum oxide, a large amount of heat can be absorbed to protect the LED lamp beads, meanwhile, the water cooling row 202, the water cooling head 205, the exhaust fan 203 and the water tank 204 work to absorb and transfer the heat radiation, in addition, the heat radiating fins 207 can also absorb and transfer the heat, the cooling of the light source system is guaranteed, and the service life of the light source system is prolonged.

When the light source system 2 works, after illumination generated by the LED lamp bead substrate 211 passes through the quartz glass plate 210 and the condensing lens 209, light can be gathered and straightened, so that the light source system generates uniform light to enter the LCD display screen, and the printing precision is ensured.

Referring to fig. 11, a front view of the peeling system 3 of the LCD photocuring 3D printer is shown.

As shown in fig. 11, the peeling system 3 includes a fixing bracket 301, a stepping motor 302, a motor base 303, an optical axis 304, an optical axis slider 305, a fixing platform 306, a striker platform 307, and a striker 308; the stripping system is constructed on the basis of a fixed platform 306, wherein a motor base 303 is installed on the fixed platform 306 and is positioned at the left side and the right side of the fixed platform 306, a stepping motor 302 is installed on the motor base 303, and a fixed support 301 is installed in the middle of the fixed platform 306 and is arranged at the back of the fixed platform 306 and is used for fixing and connecting all parts of the stripping system 3; the optical axis 304 is installed below the fixed platform 306, is located at four corners of the fixed platform 306, and passes through an optical axis slider 305 arranged on the striker platform; the striker platform 307 is mounted below the fixed platform 306 and can move up and down along the optical axis 304; the striker 308 is mounted on the striker platform 307 and can move up and down with the striker platform 307; the molded product platform 300 is mounted below the striker platform 307, the striker platform 307 can move downward to drive the striker 308 to strike the molding platform 300, and the molded product on the molding platform 300 can fall off from the molding platform 300 after being struck.

Please refer to fig. 12, which is a perspective view of the peeling system 3 of the LCD photo-curing 3D printer at an angle.

As shown in fig. 12, the peeling system further includes a fixing bracket 309, an optoelectronic limit switch 310, a lead screw 311, and a lead screw nut 312; the fixed bracket is arranged on the fixed platform 306 and is used for fixing the stripping system 3; the lead screw 311 is installed below the fixed platform 306, located at two sides of the fixed platform 306 and between the two optical axes 304, the lead screw nut 312 is installed on the striker platform 308, the lead screw 311 passes through the lead screw nut 312, and the lead screw 311 and the lead screw nut 312 are used for fixing and moving the striker platform 307; the photoelectric limit switch is mounted on the bottom surface of the fixed platform 306, and is used for limiting the distance between the striker platform 307 and the fixed platform 306.

The peeling system 3 is electrically connected with a computer control system; after the computer control system starts the peeling system 3, the stepping motor 302 provides power to drive the lead screw 311 to rotate, the lead screw 311 rotates to drive the striker platform 307 to move downwards and simultaneously drive the striker 308 on the striker platform 307 to strike the forming platform 300, and after the striker 307 strikes the forming platform 300, the formed object on the forming platform 300 can fall off from the forming platform 300 after receiving vibration, thereby finishing peeling the printed product.

Fig. 13 is a front view of a trough of the LCD photocuring 3D printer.

As shown in fig. 13, the trough 4 includes a trough fixing bracket 400 and a trough supporting plate 401.

Please refer to fig. 14, which is a perspective view of the trough of the LCD photocuring 3D printer at a certain angle.

As shown in fig. 14, the trough 4 further includes a dust cover 402, a trough cover 403, and a stepping motor 406.

As shown in fig. 13 to 14, the trough 4 is installed on the basis of a trough supporting plate 401, the trough sleeve 403 is installed on the upper surface of the trough supporting plate 401 and located in the middle of the trough supporting plate 401, the trough fixing support 400 is installed on the trough supporting plate 401 and used for fixing the trough, the dust cap is placed above the trough, and when the printing operation is not performed, the dust cap covers the trough and is used for preventing dust from polluting the printing material.

Please refer to fig. 15, which is a perspective view of a chute of the LCD photocuring 3D printer with a hidden dust cap at a certain angle.

As shown in fig. 15, the trough 4 further includes a trough main body 404 and a release film 405. The trough sleeve 403 and the trough main body 404 can be detached from the trough supporting plate 401 together, when the release film 405 needs to be replaced, a new release film can be placed on the upper surface of the trough main body 404, then the trough fixing support 400 is removed, the trough sleeve 403 and the trough main body 404 are inverted and detached from the trough supporting plate 401, after the old release film 405 is detached, the trough sleeve 403, the trough main body 404 and the release film are installed on the trough supporting plate 401, and replacement of the release film can be completed quickly, simply and conveniently.

Referring to fig. 16, a schematic cross-sectional view of the trough of the LCD photocuring 3D printer along a direction perpendicular to a vertical direction of the trough support frame is shown.

As shown in fig. 16, the scratchpad further comprises a quartz glass plate 407 and an LCD display screen 408, wherein the first quartz glass plate is arranged below the release film, the LCD display screen 408 is arranged on the lower surface of the first quartz glass plate, the second quartz glass plate is arranged on the lower surface of the LCD display screen 408, and the two quartz glass plates are arranged on the LCD display screen 408 up and down for protecting the LCD display screen.

The application the printing process of LCD photocuring 3D printer be automatic, before printing work, set up each parameter of printing the in-process on the computer, including distance between light source and the silo, distance between shaping platform and the silo, photocuring time, print shaping one deck back shaping platform distance that moves up etc.. After the corresponding parameters are set, the printing work can be started. Firstly, the light source is moved to a set position, the forming table is also moved to a corresponding position, the light source system is started, forming work is carried out on the surface of the forming table, and meanwhile, the light source cooling system starts to work to cool the light source system. After the first layer of printing and forming is finished, the stripping system and the forming platform move upwards for a distance of one layer of thickness of the formed product, then the second layer of printing and forming is started, and the rest is done until all the printing layers are formed. After the product is formed, the stripping system starts to work, and the firing pin platform drives the firing pin to impact the forming table until the product is stripped from the forming table.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An LCD photocuring 3D printer, comprising: a frame for housing a printer assembly; the stripping system is used for stripping the printed product from the forming platform; a forming platform used as a forming plane of a printed product; an LCD display screen for receiving the 3D component model; the box body is used for loading the light source system and the computer control system; the light source system is used for generating illumination and irradiating the layered image in the model to the bottom surface of the forming platform so as to solidify the light-cured material into a corresponding pattern solidified layer; a computer control system for controlling operation of the printer; a trough for storing the photocurable material; and the lifting device is used for adjusting the distance between the stripping system and the trough.

2. The LCD photocuring 3D printer of claim 1, wherein the lifting device is disposed in an upper half of a frame, the lifting device connects the stripping system and a chute, the chute is disposed below the stripping system; the forming platform is connected with the stripping system and arranged on the bottom surface of the stripping system; the LCD display screen is arranged at the bottom of the trough; the box body is arranged at the lower half part of the rack and is positioned below the material groove; the box body comprises a shell, a light source system and the computer control system, the computer control system is arranged in the box body, and the light source system is arranged in the shell and below the LCD display screen; the lifting device, the light source system, the peeling system and the LCD display screen are respectively electrically connected with the computer system.

3. The LCD photocuring 3D printer of claim 1 or 2, wherein the chassis includes a back box;

the back box comprises a mesh plate, and the mesh plate is used for installing and fixing components of the printer.

4. The LCD photocuring 3D printer of claim 1 or 2 further comprising a lift cage; the lifting cover is connected with the rack, is arranged on the upper half part of the rack and is positioned above the stripping system and the parallel table.

5. The LCD photocuring 3D printer of claim 1 or 2, wherein the cabinet further comprises a light source moving device and a light source fixing device.

6. The LCD photocuring 3D printer of claim 5, wherein the light source moving device comprises a stepper motor, a motor platform, an optical axis, and a ball screw; the stepping motor is arranged on the motor platform and is connected with the ball screw; the optical axis and the ball screw are connected with the light source system through a screw nut; the stepping motor is linked with the light source system through a ball screw.

7. The LCD photocuring 3D printer of claim 5, wherein the light source fixing device comprises a limit switch and a limit switch fixing frame; the limit switch is connected with the light source system.

8. The LCD photocuring 3D printer of claim 5, wherein the light source moving device and the light source fixing device are respectively electrically connected with a computer control system to control the distance between the light source system and the trough.

9. An LCD photocuring 3D printer as recited in claim 1 or 2 wherein the light source system comprises a light source for generating illumination to transmit light signals; the light source cooling system is used for absorbing heat generated by light illumination of the light source; the light condensing system is used for straightening light; and the light source platform is used for constructing a light source system.

10. The LCD photocuring 3D printer of claim 9, wherein the light source system further comprises a screw nut disposed on the light source platform; and a ball screw in the box body penetrates through a screw nut on the light source platform to move the light source system and adjust the distance between the light source system and the LCD display screen.

11. The LCD photocuring 3D printer of claim 9, wherein the light source is an LED lamp bead substrate disposed on a surface of the light source platform.

12. The LCD photocuring 3D printer of claim 11, wherein the LED lamp bead substrate comprises LED lamp beads and a high-temperature-resistant heat-conducting substrate, and the LED lamp beads are regularly arranged on the ceramic substrate.

13. The LCD photocuring 3D printer of claim 12, wherein the high temperature resistant and thermally conductive substrate is an aluminum nitride ceramic substrate or an aluminum oxide ceramic substrate.

14. The LCD photocuring 3D printer of claim 9, wherein the light source platform is an aluminum base plate.

15. The LCD photocuring 3D printer of claim 9, wherein the light collection system comprises a light collection optic for collimating light; a light shielding plate for collecting light and loading the heat sink; an optical axis for constructing a light condensing system; the optical axis is arranged on the light source platform and arranged around the LED lamp bead substrate; the light shading plates are arranged on the periphery of the LED lamp panel and are supported by 4 optical axes; the condensing lens is arranged above the LED lamp bead substrate and is supported by the optical axis and the light screen.

16. The LCD photocuring 3D printer of claim 15, wherein the condensing lens comprises a quartz glass plate and a fresnel lens; the quartz glass plate and the Fresnel lens are sequentially installed from bottom to top.

17. The LCD photocuring 3D printer of claim 9, wherein the light source cooling system comprises a water tank for storing water-cooled circulating water; the water cooling row is used for absorbing heat generated by the light source; the water cooling head is used for absorbing heat generated by the light source; a heat sink for absorbing heat generated by the light source; the exhaust fan is used for generating heat by the light source; the light source cooling plate is used for absorbing heat generated by the light source; the fixing frame is used for fixing the water tank to the light source platform; and the water pipe is used for connecting the water tank, the water cooling drain and the water cooling head, circulating condensed water is circulated in the parts, and heat generated by the light source is absorbed.

18. The LCD photocuring 3D printer of claim 17, wherein the water tanks are mounted on both sides of the light source platform and fixed by a fixing frame; the water cooling rows are arranged on the light shielding plate and positioned on the front side and the rear side of the light source system; the radiating fins are arranged on the shading plate and positioned on the left side and the right side of the light source system; the water cooling head is arranged on the bottom surface of the light source platform and is positioned at the lower side of the light source system; the light source heat dissipation plate is arranged on the light source platform and positioned between the light source platform and the light source heat dissipation plate; the radiating fans are arranged on the water cooling row and are positioned on the front side and the rear side of the light source system.

19. The LCD photocuring 3D printer of claim 18, wherein the heat sink is a copper heat sink and the light source heat sink is a light source heat sink.

20. The LCD photocuring 3D printer of claim 1 or 2, wherein the peeling system includes a power system for providing power to the peeling system; a fixing device for fixing the stripping system; and the firing pin platform is used for bearing the firing pin and driving the firing pin to move.

21. The LCD photocuring 3D printer of claim 20, wherein the stripping system further comprises a fixed platform for loading a motor to build the stripping system; the optical axis is used for supporting the firing pin platform, the fixing platform and the forming platform; the screw rod and the screw rod nut are used for linking the motion of the striker platform; and the limiting photoelectric switch is used for regulating and controlling the height of the stripping system from the trough.

22. The LCD photocuring 3D printer of claim 21, wherein the fixed platform is connected to and fixed by a fixture; the power system is arranged on the fixed platform and is connected with the screw rod; the firing pin platform is arranged below the fixed platform, and the optical axis passes through four corners of the firing pin platform and is fixed by the optical axis sliding block; the photoelectric limit switch is arranged on the bottom surface of the fixed platform; the stripping system is fixed on the lifting system through a fixing device.

23. The LCD photocuring 3D printer of claim 20, wherein the power system is a stepper motor.

24. The LCD photocuring 3D printer of claim 20, wherein the striker platform carries a striker for peeling off a product on the forming table.

25. The LCD photocuring 3D printer of claim 1 or 2, wherein the gutter includes a pallet for mounting the gutter; the material groove main body is used for storing printing materials; the release film is used for peeling the printed product; the fixing frame is used for fixing the trough main body.

26. The LCD photocuring 3D printer of claim 26, wherein the gutter body is mounted in the center of the pallet and fixed by a fixing frame; the release film is arranged on the bottom surface of the trough main body.

27. The LCD photocuring 3D printer of claim 26, wherein the gutter further comprises a gutter sleeve mounted around the gutter body for taking out the gutter body and the release film.

28. The LCD photocuring 3D printer of claim 26, wherein the support platform is a hollow structure with a hollow location that fits the cradle body for mounting an LCD display screen; a first quartz glass plate is arranged below the release film, and the release film is attached to the first quartz glass plate; an LCD display screen is arranged below the first quartz glass plate and is attached to the first quartz glass plate; and a second quartz glass plate is arranged below the LCD display screen, and the LCD display screen is attached to the second quartz glass plate.