CN211390151U

CN211390151U - Formula of sinking liquid crystal 3D printing system

Info

Publication number: CN211390151U
Application number: CN201922339074.9U
Authority: CN
Inventors: 杨清
Original assignee: Shanghai Ziyu Material Technology Co ltd
Current assignee: Shanghai Ziyu Material Technology Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-01
Anticipated expiration: 2029-12-20

Abstract

The application discloses a sinking type liquid crystal 3D printing system, which comprises a raw material groove, a printing device and a printing device, wherein the raw material groove is used for accommodating a photosensitive material; the forming platform is arranged in the raw material groove and can move along the vertical direction; the driving device is used for driving the forming platform to move along the vertical direction; the shaping light source, fixed set up in the top of shaping platform, be used for to being located the photosensitive material of shaping platform top shines pattern light, the shaping light source includes light source device and sets up light source device with liquid crystal display between the shaping platform, the shaping platform with be provided with the printing opacity material between the liquid crystal display from the type layer. So set up, guarantee to print the layer precision from the type layer through setting up in photosensitive material top, cancelled the setting to the scraper blade, reduced the distance between liquid crystal display and the photosensitive material, be favorable to guaranteeing the normal clear that 3D printed to formula 3D printing apparatus and liquid crystal display's combination has been realized sinking.

Description

Formula of sinking liquid crystal 3D printing system

Technical Field

The utility model relates to a three-dimensional printing technical field especially relates to a formula of sinking liquid crystal 3D printing system.

Background

The desktop photosensitive 3D printer currently in the market includes SLA, DLP, LCD and other types, wherein the SLA and DLP form two types of devices, an ascending type and a descending type according to platform ascending and platform descending. The platform of the platform-ascending printing equipment gradually ascends, the film needs to be continuously pulled out to print layer by layer, and the success rate of printing is influenced by the existence of the die pulling force; the platform of the platform sinking type printing equipment is gradually descended, a photosensitive resin material needs to be continuously filled above the platform, and in order to ensure the precision of a printing layer, when the photosensitive resin material is filled, a scraper needs to move back and forth along the horizontal direction so as to evenly tile the photosensitive resin material.

The LCD is one of three major main photosensitive 3D printing and forming principles, and has no lens distortion during large-area forming, so that the printing quality can be improved. However, the LCD structure requires a backlight to pass through the liquid crystal display and then irradiate the photosensitive resin material, and since the light path cannot be irradiated far after passing through the liquid crystal display, the LCD structure can only be disposed close to the molding surface of the photosensitive resin material, otherwise, the LCD structure may cause the image to be out of focus and blurred. Among traditional formula printing apparatus that sinks, if set up liquid crystal display above the scraper blade, the existence of scraper blade has increased the distance between liquid crystal display and the photosensitive resin material, and the distance between liquid crystal display and the photosensitive resin material is great, can't guarantee the normal clear that 3D printed, so the printing apparatus of present LCD type is ascending only.

Therefore, how to solve the problem that the liquid crystal display screen cannot be applied to the conventional sink type 3D printing apparatus due to the setting of the squeegee is an important technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists in the correlation technique to a certain extent at least, this application provides a formula of sinking liquid crystal 3D printing system, and it can solve the problem that the liquid crystal display that leads to because of the setting of scraper blade can't be applicable to traditional formula of sinking 3D printing apparatus.

The utility model discloses a realize like this: a sunken liquid crystal 3D printing system, comprising:

a raw material tank for accommodating a photosensitive material;

the forming platform is arranged in the raw material groove and can move along the vertical direction;

the driving device is used for driving the forming platform to move along the vertical direction;

the shaping light source, fixed set up in the top of shaping platform, be used for to being located the photosensitive material of shaping platform top shines pattern light, the shaping light source includes light source device and sets up light source device with liquid crystal display between the shaping platform, the shaping platform with be provided with the printing opacity material between the liquid crystal display from the type layer.

Preferably, raw materials groove top is provided with relatively fixed support frame, in order to right drive arrangement with the shaping light source supports, be provided with on the support frame and be used for control from the control boss of distance between type layer lower surface and the photosensitive material upper liquid level, liquid crystal display with the lower extreme fixed connection of control boss.

Preferably, the support frame is detachably connected with the raw material tank.

Preferably, the release layer is a film with a release function or glass with a release coating.

Preferably, the raw material groove is of a cylindrical structure with an open upper end, a partition plate is arranged inside the raw material groove, the edge of the partition plate is hermetically connected with the inner side wall of the raw material groove so as to divide the inner space of the raw material groove into a first material groove and a second material groove which are mutually independent, and the upper edge of the partition plate is lower than the upper end edge of the raw material groove.

Preferably, the driving device comprises a screw nut transmission assembly, a screw of the screw nut transmission assembly can rotate relative to the support frame in a fixed-axis mode, and a sliding block of the screw nut transmission assembly is fixedly connected with the forming platform through a connecting support.

Preferably, the screw rod nut transmission assembly further comprises a guide rail extending along the axial direction of the screw rod nut transmission assembly, and the sliding block of the screw rod nut transmission assembly is in sliding fit with the guide rail.

Preferably, a refraction component which enables light to vertically irradiate on the liquid crystal display screen is arranged between the light source device and the liquid crystal display screen.

Preferably, the lower extreme of raw materials groove is provided with a plurality of regulation lower margins, and is a plurality of adjust the lower margin along the circumference evenly distributed of raw materials groove.

Preferably, the light source device comprises an ultraviolet lamp.

The technical scheme provided by the application comprises the following beneficial effects:

the application provides a pair of formula of sinking liquid crystal 3D printing system, including former feed tank, shaping platform, drive arrangement and shaping light source, wherein the former feed tank is used for holding photosensitive material, and the setting of shaping platform is in the former feed tank, and can immerse below photosensitive material's the liquid level. The driving device is used for driving the forming platform to move along the vertical direction, and after the printing of one layer thickness is finished, the driving device drives the forming platform to move downwards so as to print the next layer. The forming light source is fixedly arranged above the forming platform and used for irradiating pattern light to the photosensitive material above the forming platform to enable the photosensitive material above the forming platform to generate photochemical reaction and be solidified. The molding light source comprises a light source device and a liquid crystal display screen arranged between the light source device and the molding platform, and light rays emitted by the light source device irradiate on the liquid crystal display screen to form pattern light consistent with the model slices. Be provided with from the type layer between shaping platform and liquid crystal display, be the printing opacity material from the type layer to ensure that the pattern light that the shaping light source sent can shine smoothly on photosensitive material. In the printing process, the photosensitive material generates photochemical reaction, one end close to the forming platform is bonded with the forming platform, the release layer is matched with the forming platform to control each printing layer, and the printing layer precision can be ensured. So set up, guarantee to print the layer precision from the type layer through setting up in photosensitive material top, cancelled the setting to the scraper blade, reduced the distance between liquid crystal display and the photosensitive material, be favorable to guaranteeing the normal clear that 3D printed to formula 3D printing apparatus and liquid crystal display's combination has been realized sinking.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sunken liquid crystal 3D printing system in a use state according to an embodiment of the present invention;

fig. 2 is a schematic block diagram illustrating a structure of a sunken liquid crystal 3D printing system in another use state according to an embodiment of the present invention;

FIG. 3 is an enlarged view of I of FIG. 1;

fig. 4 is a schematic diagram of a raw material tank according to an embodiment of the present invention.

Reference numerals:

1. a raw material tank; 2. a photosensitive material; 3. a forming platform; 4. a drive device; 5. a light source device; 6. a liquid crystal display screen; 7. a release layer; 8. a support frame; 9. controlling the boss; 10. a partition plate; 11. a first trough; 12. a second trough; 13. connecting a bracket; 14. adjusting the ground feet; 15. an isolation layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An object of this embodiment is to provide a formula of sinking liquid crystal 3D printing system, solves the problem that the liquid crystal display that leads to because of the setting of scraper blade can't be applicable to traditional formula of sinking 3D printing apparatus.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to FIGS. 1-4, schematic structural diagrams of a sunken liquid crystal 3D printing system in some exemplary embodiments are shown. The sinking type liquid crystal 3D printing system provided by the embodiment comprises a raw material tank 1, a forming platform 3, a driving device 4 and a forming light source, wherein the raw material tank 1 is used for accommodating a photosensitive material 2, and the forming platform 3 is arranged in the raw material tank 1 and can be immersed below the liquid level of the photosensitive material 2. The driving device 4 is used for driving the forming platform 3 to move along the vertical direction, after the printing of one layer thickness is completed, the driving device 4 drives the forming platform 3 to move downwards, the cured photosensitive material 2 moves downwards along with the forming platform 3, the distance of the downward movement of the forming platform 3 is greater than the thickness of one layer thickness, then the driving device 4 drives the forming platform 3 to move upwards to enable the distance between the upper surface of the cured photosensitive material 2 on the forming platform 3 and the upper surface of the liquid photosensitive material 2 to be the thickness of one layer thickness, so that the next layer of printing is performed, and the process is circulated until the printing is completed. The forming light source is fixedly arranged above the forming platform 3 and used for irradiating pattern light to the photosensitive material 2 above the forming platform 3 to enable the photosensitive material 2 above the forming platform 3 to generate photochemical reaction and be cured.

The molding light source comprises a light source device 5 and a liquid crystal display screen 6 arranged between the light source device 5 and the molding platform 3, the liquid crystal display screen 6 displays corresponding 3D model slice images through computer signals, and pattern light consistent with model slices is formed after light emitted by the light source device 5 irradiates and penetrates through the liquid crystal display screen 6. Be provided with from type layer 7 between shaping platform 3 and liquid crystal display 6, from type layer 7 for the printing opacity material to ensure that the pattern light that the shaping light source sent can shine smoothly on photosensitive material 2. In the printing process, the photosensitive material 2 is subjected to photochemical reaction, one end close to the forming platform 3 is bonded with the forming platform 3, the release layer 7 is matched with the forming platform 3 to control each printing layer, the problem of uneven layer thickness is avoided, and the printing layer precision can be ensured.

So set up, guarantee to print the layer precision from type layer 7 through setting up in photosensitive material 2 top, cancelled the setting to the scraper blade, reduced the distance between liquid crystal display 6 and photosensitive material 2, be favorable to guaranteeing the normal clear that 3D printed to formula 3D printing apparatus and liquid crystal display 6's combination has been realized sinking.

Before printing, the computer system slices the printing model, and then transmits data such as the cross-sectional area and the thickness of each slice into the control system through the wireless network. The movement of the forming platform 3, the starting of the forming light source and the change of the pattern light of the provided model slice in the sunken liquid crystal 3D printing system are controlled by the control system, and the control system is in communication connection with the driving device 4 of the forming platform 3 and the forming light source so as to realize the synchronous control of the forming platform 3 and the forming light source. The control principle and method of the above control system are well known to those skilled in the art, and are not described in detail herein.

In the printing process, the photosensitive material 2 which is solidified on the forming platform 3 is immersed in the liquid photosensitive material 2 in the raw material tank 1, and the volume change of the photosensitive material 2 in the solidification process is small, so that excessive change of the liquid level position can not be caused generally, the photosensitive material 2 does not need to be added into the raw material tank 1 in the printing process, and the printing process is more convenient and fast compared with the common ascending type printing equipment which needs to continuously add the photosensitive material 2 in the printing process.

A support frame 8 is provided above the raw material tank 1, the support frame 8 is fixed to the raw material tank 1, and the driving device 4 and the molded light source are provided on the support frame 8 to support the driving device 4 and the molded light source. In the preferred embodiment, a control boss 9 is arranged on the support frame 8, and the liquid crystal display screen 6 is fixedly connected with the lower end of the control boss 9. Detachable is connected between control boss 9 and the support frame 8, and the thickness of control boss 9 is different, and control boss 9 lower surface place height is different, and under the condition of 2 liquid level rigidity of photosensitive material, liquid crystal display 6 is different with the distance from

type layer

7 and 2 liquid levels of photosensitive material, can be through changing the control boss 9 of different thickness, and the control is from the distance between the liquid level on layer 7 lower surface and the photosensitive material 2.

When the lower surface of the release layer 7 is located below the upper liquid level of the photosensitive material 2, that is, when the distance between the lower surface of the release layer 7 and the upper liquid level of the photosensitive material 2 is a negative value, the photosensitive material 2 is filled between the release layer 7 and the forming platform 3, as shown in fig. 1. Lie in the photosensitive material 2 curing process between type layer 7 and forming platform 3, photosensitive material 2 with from type layer 7 contact, from the restriction of type layer 7 lower surface to photosensitive material 2, be favorable to guaranteeing to print the layer precision.

When having the clearance or going up the liquid level parallel and level from type layer 7 lower surface and photosensitive material 2 between the liquid level, when being non-negative from the distance between the liquid level on type layer 7 lower surface and photosensitive material 2 promptly, lie in from the photosensitive material 2 solidification back between type layer 7 and the forming platform 3, when forming platform 3 moves down, photosensitive material 2 and from not leaving the type process between type layer 7, at this moment, do not exist from type force, be favorable to guaranteeing to print the success rate. When the distance between the liquid level is less from type layer 7 lower surface and photosensitive material 2, if be less than 1 millimeter, photosensitive material 2 with from type layer 7 contactless, but also can restrict the bulge degree that photosensitive material 2 upper surface appears because photosensitive material's shrink to a certain extent from type layer 7, can restrict the excessive change of layer thickness to a certain extent from type layer 7 promptly, prevent that the layer precision from descending. Non-reactive filling media such as: air or silicone oil, water or low density monofunctional monomers, and the like, which are low in density, have a tendency to migrate across the surface, and are inert to photochemical reactions, as shown in FIG. 2. When the non-reactive filling medium is liquid substances such as silicone oil or water, the non-reactive filling medium has a certain pressure on the liquid surface of the photosensitive material 2, and can also improve the printing layer precision to a certain extent and accelerate the leveling of the photosensitive material.

In conclusion, the sunken liquid crystal 3D printing system can be used for printing without release force by replacing the control bosses 9 with different thicknesses so as to ensure the printing success rate; the sunken liquid crystal 3D printing system can also be used for printing with a release force, so that the printing layer precision is ensured. According to the printing requirement, the control boss 9 with the corresponding thickness is selected and replaced before printing.

It should be noted that each molecule of the monofunctional monomer contains only one group capable of participating in the photocuring reaction, and the monofunctional monomer has a slow curing speed, a low density and a low viscosity. The substance has a lower density relative to the photosensitive material 2, does not participate or participates less in the photochemical reaction, has a stronger tendency to delaminate from the photosensitive material 2 under the action of surface tension, polarity difference and density, and after the substance is added into the photosensitive material 2, the substance is gathered towards the surface of the photosensitive material 2 at the end contacting with air, so that a layer of isolating layer 15 is formed above the photosensitive material 2. Under the irradiation of shaping light source, photosensitive material 2 takes place the photochemical reaction and solidifies, photosensitive material 2 is close to the one end of shaping platform 3 and bonds on shaping platform 3, the other end is because the photochemical inertia of above-mentioned substance, form a no reaction area, the release force has been reduced, and simultaneously, quick travel through shaping platform 3, under atmospheric pressure, density, polarity and surface tension's multiple action, make photosensitive material 2 evenly tile in the regional department of space, still can realize the quick replenishment of photosensitive material 2 above shaping platform 3.

Further, the connection between the support frame 8 and the raw material tank 1 is set as a detachable connection, so that the support frame 8 and the raw material tank 1 are two independent parts, such as: the support frame 8 is directly supported on the upper end of the raw material tank 1. The forming platform 3, the driving device 4 and the forming light source are all connected to the supporting frame 8, when the photosensitive material 2 in the raw material tank 1 is replaced or the raw material tank 1 is cleaned, the supporting frame 8 can be directly taken down from the raw material tank 1, any adjustment on the forming platform 3, the driving device 4 and the forming light source is not needed, and the forming platform is convenient and fast.

In the implementation, above-mentioned from type layer 7 can be for having the film of type function or have the glass from the type coating, for the scraper blade among the traditional formula 3D printing apparatus that sinks, the thickness of from type layer is less, is favorable to reducing the distance between the liquid level on liquid crystal display 6 and the photosensitive material 2. The film with from type function can be for fluoridizing the membrane, perfluoroethylene or tetrafluoroethylene etc. and the membrane needs to be the state of tightening in the use, and the shaping platform 3 moves the in-process downwards, guarantees that the membrane does not take place deformation or takes place less deformation, guarantees layer precision to a certain extent. The surface of the glass with the release coating is a hard plane, deformation can not occur due to movement of the forming platform 3 and flowing of the photosensitive material 2 in the printing process, the flatness of the glass is not influenced in the printing process, the printing layer precision can be well guaranteed, and the printing quality is guaranteed.

It should be noted that, in order to ensure that the film is in a tight state, a supporting frame may be disposed on the supporting frame 8, so that the edge of the film is hermetically connected to the supporting frame.

In this embodiment, the raw material tank 1 has a cylindrical structure with an open upper end, and specifically, may be provided in a hollow cylinder shape, a cube shape, or other irregular shapes with an open upper end. The material tank 1 is internally provided with a partition plate 10, the edge of the partition plate 10 is hermetically connected with the inner side wall of the material tank 1, and the partition plate is used for partitioning the inner space of the material tank 1 into a first material tank 11 and a second material tank 12 which are independent of each other, wherein the upper edge of the partition plate 10 is lower than the upper end edge of the material tank 1. A first tank 11 and a second tank 12, one of which contains the photosensitive material 2, for 3D printing. For convenience of explanation, it is specified that the photosensitive material 2 is filled in the first tank 11, the upper liquid levels of the liquid photosensitive material 2 and the liquid non-reactive filling medium in the first tank 11 do not exceed the upper edge of the partition plate 10, and the excess liquid photosensitive material 2 and the liquid non-reactive filling medium enter the second tank 12 for storage, so that the liquid level is kept stable, and the liquid level control function of the first tank 11 is achieved. Compared with a mode of adding a pump to an electronic liquid level controller used in a traditional 3D printer, the technical scheme adopts a physical mode to control the position of the liquid level, and has the advantages of simple structure, low cost, high efficiency, durability and strong practicability. In this case, the cross-sectional area of the first trough 11 is larger than that of the second trough 12, so that the sunken liquid crystal 3D printing system can print a model with a larger transverse size.

In practice, the above-mentioned driving device 4 may, but is not limited to, comprise a lead screw nut transmission assembly. The screw nut transmission assembly comprises a screw rod capable of rotating in a fixed shaft mode and a sliding block matched with the screw rod in a threaded mode, and the sliding block can only move in the axial direction of the screw rod. The lead screw is vertically arranged on the support frame 8, and the slide block is fixedly connected with the forming platform 3 through the connecting support 13. Can order about the lead screw through the motor and rotate at the end connection motor of lead screw, lead screw dead axle when rotating, the axial displacement of lead screw can be followed to the slider to drive forming platform 3 and reciprocate in raw materials groove 1.

In implementation, a relatively fixed guide rail is arranged around the screw nut transmission assembly, the axis of the guide rail is parallel to the axis of the screw, and the sliding block is in sliding fit with the guide rail. In the process that the sliding block moves along the axial direction of the lead screw, the guide rail can limit the sliding block to rotate along with the lead screw and can also guide the sliding block to move along the axial direction of the lead screw. The guide rails can be arranged in two numbers, and the two guide rails are respectively positioned on two sides of the screw rod.

It should be noted that, in this embodiment, the driving device 4 for driving the forming platform 3 to move up and down is disposed on the supporting frame 8, and compared with a manner of connecting the driving device 4 with the peripheral frame of the raw material tank 1 in a conventional sink printing apparatus, the sink type liquid crystal 3D printing system in this embodiment has a compact overall structure and a small machine body, and is suitable for manufacturing a portable desktop-level apparatus.

In order to further ensure the printing quality, a refraction assembly can be arranged between the light source device 5 and the liquid crystal display screen 6, so that light rays vertically irradiate on the liquid crystal display screen 6 and the release layer 7, the collimation irradiation and the energy distribution of the light source are uniform, the energy uniformity of each exposure area is ensured, the photochemical reaction is consistent, the performance of the photosensitive material 2 after being cured is stable, and the precision is high. The refraction element may be a fresnel lens.

In this embodiment, a plurality of adjustment feet 14 are provided at the lower end of the raw material tank 1, and the plurality of adjustment feet 14 are uniformly distributed along the circumferential direction of the raw material tank 1. Because the support frame 8 that is connected with forming platform 3 supports in the upper end of raw materials groove 1, can adjust the levelness of raw materials groove 1 upper end through adjustment regulation lower margin 14, and then adjusts the levelness of forming platform 3 upper surface, guarantees the depth of parallelism between photosensitive material 2 upper liquid level and forming platform 3 upper surface to improve and print the layer precision.

In this embodiment, the light source device 5 may be an ultraviolet lamp, and the ultraviolet lamps are disposed in a plurality of positions, and the ultraviolet lamps are uniformly distributed above the liquid crystal display screen 6, so as to ensure uniform distribution of ultraviolet light irradiated above the liquid crystal display screen 6, thereby making the energy of each exposure region uniform, ensuring uniform photochemical reaction, and having stable performance and high precision after the photosensitive material 2 is cured.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A formula of sinking liquid crystal 3D printing system, its characterized in that includes:

a raw material tank (1) for accommodating a photosensitive material (2);

the forming platform (3) is arranged in the raw material groove (1) and can move along the vertical direction;

the driving device (4) is used for driving the forming platform (3) to move along the vertical direction;

the shaping light source, fixed set up in the top of shaping platform (3), be used for to being located photosensitive material (2) above shaping platform (3) shine the pattern light, the shaping light source includes light source device (5) and sets up light source device (5) with liquid crystal display (6) between shaping platform (3), shaping platform (3) with be provided with the type layer (7) of leaving of printing opacity material between liquid crystal display (6).

2. The sinking type liquid crystal 3D printing system according to claim 1, wherein a support frame (8) which is relatively fixed is arranged above the raw material tank (1) to support the driving device (4) and the forming light source, a control boss (9) for controlling the distance between the lower surface of the release layer (7) and the upper liquid surface of the photosensitive material (2) is arranged on the support frame (8), and the liquid crystal display screen (6) is fixedly connected with the lower end of the control boss (9).

3. A sunken liquid crystal 3D printing system according to claim 2 wherein the support frame (8) is detachably connected to the stock vat (1).

4. The sunken liquid crystal 3D printing system of claim 1, wherein the release layer (7) is a film with release function or glass with release coating.

5. The sinking type liquid crystal 3D printing system according to claim 1, wherein the raw material tank (1) is of a cylindrical structure with an open upper end, a partition plate (10) is arranged inside the raw material tank (1), the edge of the partition plate (10) is hermetically connected with the inner side wall of the raw material tank (1) so as to divide the inner space of the raw material tank (1) into a first tank (11) and a second tank (12) which are independent of each other, and the upper edge of the partition plate (10) is lower than the upper end edge of the raw material tank (1).

6. The sunken liquid crystal 3D printing system of claim 2, wherein the driving device (4) comprises a lead screw nut transmission assembly, a lead screw of the lead screw nut transmission assembly can be fixed-axis rotated relative to the support frame (8), and a slide block of the lead screw nut transmission assembly is fixedly connected with the forming platform (3) through a connecting bracket (13).

7. The sunken liquid crystal 3D printing system of claim 6, further comprising a guide rail extending in an axial direction of the lead screw nut transmission assembly, wherein a slider of the lead screw nut transmission assembly is in sliding fit with the guide rail.

8. The sunk liquid crystal 3D printing system of claim 1, wherein a refractive component is disposed between the light source device (5) and the liquid crystal display (6) to allow light to vertically impinge on the liquid crystal display (6).

9. The sunk liquid crystal 3D printing system of claim 1, wherein the lower end of the raw material tank (1) is provided with a plurality of adjustment feet (14), and the plurality of adjustment feet (14) are uniformly distributed along the circumferential direction of the raw material tank (1).

10. A sunken liquid crystal 3D printing system according to claim 1 wherein the light source device (5) comprises an ultraviolet lamp.