阅读说明：本技术 一种3d打印液槽装置、3d打印机和3d打印方法 (3D printing liquid tank device, 3D printer and 3D printing method ) 是由 宋战波 袁剑 陈小强 刘武 齐志宏 祁杨停 周利锋 吕启涛 高云峰 于 2019-04-28 设计创作，主要内容包括：本发明公开了一种3D打印液槽装置、3D打印机和3D打印方法。包括用于盛放打印溶液的液槽组件,液槽组件与驱动组件分别位于安装板的相对两侧,液槽组件部分容纳在安装板内,液槽组件的底部全部透明或者对应固化光的位置透明；安装板上在液槽组件对应固化光的位置设有用于使固化光通过的通孔；驱动组件的输出端穿过安装板与液槽组件的底部固定连接；液槽组件在驱动组件的驱动下做预设角度的往返摆动运动,刮刀组件位于液槽组件中的打印区域在往返摆动过程中所辐射的范围内,使刮刀组件在打印区域往返摆动的过程中将位于打印区域的打印溶液刮平。相比于现有技术来说,打印溶液更加平整,而且极大地提升了打印效率。(The invention discloses a 3D printing liquid tank device, a 3D printer and a 3D printing method. The printing device comprises a liquid tank assembly for containing printing solution, wherein the liquid tank assembly and a driving assembly are respectively positioned on two opposite sides of a mounting plate, the liquid tank assembly is partially contained in the mounting plate, and the bottom of the liquid tank assembly is completely transparent or transparent corresponding to the position of curing light; a through hole for enabling curing light to pass through is formed in the position, corresponding to the curing light, of the liquid groove assembly on the mounting plate; the output end of the driving component penetrates through the mounting plate and is fixedly connected with the bottom of the liquid tank component; the liquid tank assembly is driven by the driving assembly to do reciprocating swing movement with a preset angle, and the scraper assembly is located in the radiation range of the printing area in the liquid tank assembly in the reciprocating swing process, so that the printing solution in the printing area is scraped by the scraper assembly in the reciprocating swing process of the printing area. Compared with the prior art, the printing solution is smoother, and the printing efficiency is greatly improved.)

1. A3D printing liquid tank device is characterized by comprising a liquid tank assembly for containing printing solution, a mounting plate, a driving assembly and a scraper assembly for scraping the printing solution flatly;

the liquid tank assembly and the driving assembly are respectively positioned at two opposite sides of the mounting plate, the liquid tank assembly is partially accommodated in the mounting plate, and the bottom of the liquid tank assembly is completely transparent or transparent corresponding to the position of the curing light;

a through hole for enabling curing light to pass through is formed in the position, corresponding to the curing light, of the liquid tank assembly on the mounting plate, so that the curing light can pass through the through hole and the transparent bottom of the liquid tank assembly to realize exposure and curing of printing solution, and a groove which is used for accommodating the liquid tank assembly and is matched with the peripheral shape of the liquid tank assembly is formed in the middle of the mounting plate;

the output end of the driving assembly penetrates through the mounting plate to be fixedly connected with the bottom of the liquid tank assembly, the liquid tank assembly is driven by the driving assembly to do reciprocating swing motion of a preset angle, and the scraper assembly is located on one side of a printing area in the liquid tank assembly and does not exceed the limit position reached by the printing area and is used for scraping the printing solution located in the printing area in the reciprocating swing process of the printing area;

The printing area is a printing solution area which needs to be exposed and solidified in the liquid tank assembly, and the printing area is located in the transparent area of the liquid tank assembly.

2. A 3D printing fluid bath apparatus according to claim 1, wherein the predetermined angle is 90 to 150 degrees.

3. The 3D printing gutter device according to claim 2, characterized in that said drive assembly comprises a rotation shaft and a drive;

the one end of rotation axis pass through the shaft coupling with the driving piece is connected, and the other end passes the mounting panel with the bottom fixed connection of cistern subassembly, the rotation axis is in the mounting panel with the partial cover that the shaft coupling pressed from both sides is equipped with bearing structure, the rotation axis is in drive under the drive of driving piece the reciprocating swing motion of predetermineeing the angle is done to the cistern subassembly.

4. A 3D printing gutter device according to claim 3 wherein the gutter assembly comprises an opaque base plate, an annular gutter body on the base plate, the base plate and gutter body enclosing a holding space for the printing solution;

glass is arranged on the bottom plate and positioned inside the liquid tank body, and the upper surface of the glass is covered with a film;

The bottom plate is provided with a light hole corresponding to the position of the curing light, and the glass and the film both correspond to the position of the light hole and can fully cover the light hole so that the curing light can directly irradiate the printing solution through the light hole and the transparent glass and the film for exposure and curing;

the bottom plate part is held in the mounting panel, and correspondingly, the middle part of mounting panel is provided with holds the bottom plate and with the recess of the external shape looks adaptation of bottom plate.

5. The 3D printing fluid bath apparatus according to claim 3, wherein the 3D printing fluid bath apparatus further comprises a positioning component, wherein,

the positioning assembly comprises a photoelectric separation blade, an optical coupler and an optical coupler fixing seat for fixing the optical coupler;

the optical coupler fixing seats are arranged in parallel along the axial direction of the rotating shaft, one end of each optical coupler fixing seat is fixed on the mounting plate, and the other end of each optical coupler fixing seat is used for mounting an optical coupler;

the photoelectric retaining sheet is fixed on the outer end face of the bearing structure and extends into the optical coupler along the radial direction of the rotating shaft, and the photoelectric retaining sheet is matched with the optical coupler.

6. A3D printer comprising a base, a printing mechanism, an opto-mechanical module, a control mechanism and a 3D printing fluid bath apparatus according to any one of claims 1 to 5;

The 3D printing liquid tank device is arranged on the base through the mounting plate;

the printing mechanism is arranged on the base and positioned at the periphery of the 3D printing liquid tank device, and comprises a driving module and a printing plate, wherein the driving module is arranged in a direction vertical to the bottom of the liquid tank assembly, and the printing plate is arranged on the driving module in a sliding manner;

the printing plate is aligned to a printing area during exposure and curing, and is driven by the driving module to linearly reciprocate along the driving module to be close to or far away from the printing area;

the optical-mechanical module is arranged in the base, and a curing light outlet is aligned with the printing plate, so that during exposure and curing, the curing light penetrates through the 3D printing liquid groove device and is directly irradiated onto the printing solution, and the printing solution is directly bonded on the printing plate after being cured;

the control mechanism is respectively connected with the printing mechanism, the optical machine module and the 3D printing liquid tank device and is used for controlling the actions of the printing mechanism, the optical machine module and the 3D printing liquid tank device.

7. The 3D printer according to claim 6, further comprising a turnover mechanism disposed in the base, wherein the turnover mechanism is disposed on a side of the mounting plate facing away from the printing mechanism, and is configured to drive the mounting plate to separate from the cured layer of the cured printing mold after printing is completed;

The turnover mechanism comprises a power push rod and a shaft structure, and the power push rod and the shaft structure are respectively arranged at two opposite ends of the same surface of the mounting plate;

the power push rod is arranged in the direction perpendicular to the bottom of the liquid tank assembly, the power end of the power push rod is fixed to the base, the output end of the power push rod is fixedly connected with the mounting plate and used for pulling the corresponding end of the mounting plate to move, and then the 3D printing liquid tank device is driven to rotate along the shaft structure.

8. A3D printing method, comprising:

step 1, a control mechanism controls a printing plate in a printing mechanism to move towards a direction close to a printing area in a liquid tank assembly, and the movement is stopped until the distance between the printing plate and the upper surface of the printing area is one printing layer thickness; the control mechanism controls the driving assembly to drive the liquid tank assembly to do reciprocating swing motion with a preset angle, and controls the scraper assembly to scrape the printing solution in the printing area in the liquid tank assembly to be one layer thick;

step 2, after the liquid tank assembly stops swinging, the control mechanism controls the optical-mechanical module to emit curing light to penetrate through the bottom of the liquid tank assembly and directly irradiate the printing solution to cure the printing solution, and the cured printing model is bonded on a printing plate to obtain a printing model curing layer;

Step 3, controlling a control mechanism to control a power push rod to pull a mounting plate so as to drive the 3D printing liquid tank device to perform turnover motion around a shaft structure, so that a printing model curing layer is separated from the bottom of the liquid tank assembly;

step 4, after the 3D printing liquid tank device is turned to a preset position, the control mechanism controls the printing plate in the printing mechanism to move in the direction of enabling the printing model curing layer to be far away from the bottom of the liquid tank assembly, and the printing model curing layer is thoroughly separated from the liquid tank assembly;

and 5, after the curing layer of the model to be printed is thoroughly separated from the liquid tank assembly, controlling a mechanism to control a power push rod to pull a mounting plate so as to drive the 3D printing liquid tank device to perform reset motion around the shaft structure until the 3D printing liquid tank device is restored to an initial state.

9. The 3D printing method according to claim 8, characterized in that the 3D printing method further comprises the following steps occurring after the step 5:

counting the printing times;

judging whether the printing times reach a preset value or not;

when the printing times reach the preset value, the driving assembly drives the liquid tank assembly to rotate for 360 degrees in the whole circle, so that the printing solution is stirred more fully.

10. The 3D printing method according to claim 8, wherein the step of controlling the driving assembly to drive the liquid tank assembly to perform reciprocating swing motion at a preset angle and controlling the scraper assembly to scrape the printing solution in the printing area in the liquid tank assembly to a layer thickness specifically comprises:

The position of the printing area, which is aligned with the curing light, is an initial position, and the printing area is initially positioned on one side of the scraper component;

the liquid tank assembly is driven by the driving assembly to rotate towards the scraper assembly by a preset angle, and when the preset angle is reached, the liquid tank assembly rotates reversely by the preset angle to drive the printing area to return to the initial position;

during rotation, the scraper component scrapes the printing solution of the printing area in the liquid groove component twice, so that the printing solution is one layer thick.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a 3D printing liquid tank device, a 3D printer and a 3D printing method.

Background

At present, photocuring 3D printing is to hold printing solution such as liquid photosensitive resin in a liquid tank, and finally generate a printing model through exposure layer by layer solidification of a light machine.

When the resin solution with lower viscosity is printed, the printing solution has good fluidity and can be self-leveled, but when the resin solution with higher viscosity is printed, the self-leveling is difficult to realize due to poor fluidity of the viscous resin, so that the printing speed and the printing precision are influenced, and even the printing failure condition can occur;

in order to solve the problem, a rotatable liquid tank and a scraper mechanism are designed to scrape viscous printing solution, but the liquid tank and the printing area rotate for a whole circle, and the effective time for scraping the printing solution in the printing area in the process of rotating the liquid tank and the printing area for a circle only accounts for a part, so that the rotating time is too long, and the printing efficiency is influenced.

Disclosure of Invention

The invention aims to provide a 3D printing liquid tank device, a 3D printer and a 3D printing method aiming at the technical problems in the prior art, and compared with the full-circle rotation of a liquid tank and a printing area in the prior art, the liquid tank device, the 3D printer and the 3D printing method reduce a part of invalid rotation time, improve the printing efficiency and solve the problems of overlong rotation time and low printing efficiency in the prior art.

In order to solve the problems proposed above, the technical scheme adopted by the invention is as follows:

on one hand, the embodiment of the invention discloses a 3D printing liquid tank device,

the printing device comprises a liquid tank assembly for containing printing solution, a mounting plate, a driving assembly and a scraper assembly for scraping the printing solution smoothly;

the liquid tank assembly and the driving assembly are respectively positioned at two opposite sides of the mounting plate, the liquid tank assembly is partially accommodated in the mounting plate, and the bottom of the liquid tank assembly is completely transparent or transparent corresponding to the position of the curing light;

a through hole for enabling curing light to pass through is formed in the position, corresponding to the curing light, of the liquid tank assembly on the mounting plate, so that the curing light can pass through the through hole and the transparent bottom of the liquid tank assembly to realize exposure and curing of printing solution, and a groove which is used for accommodating the liquid tank assembly and is matched with the peripheral shape of the liquid tank assembly is formed in the middle of the mounting plate;

the output end of the driving assembly penetrates through the mounting plate to be fixedly connected with the bottom of the liquid tank assembly, the liquid tank assembly is driven by the driving assembly to do reciprocating swing motion of a preset angle, and the scraper assembly is located on one side of a printing area in the liquid tank assembly and does not exceed the limit position reached by the printing area and is used for scraping the printing solution located in the printing area in the reciprocating swing process of the printing area;

And the printing area is a printing solution area which needs to be exposed and solidified in the liquid tank assembly.

Optionally, the preset angle is 90 to 150 degrees.

Further, the drive assembly comprises a rotating shaft and a drive member;

the one end of rotation axis pass through the shaft coupling with the driving piece is connected, and the other end passes the mounting panel with the bottom fixed connection of cistern subassembly, the rotation axis is in the mounting panel with the partial cover that the shaft coupling pressed from both sides is equipped with bearing structure, the rotation axis is in drive under the drive of driving piece the reciprocating swing motion of predetermineeing the angle is done to the cistern subassembly.

Further, the liquid tank assembly comprises an opaque bottom plate and an annular liquid tank body positioned on the bottom plate, and the bottom plate and the liquid tank body enclose an accommodating space for accommodating the printing solution;

glass is arranged on the bottom plate and positioned inside the liquid tank body, and the upper surface of the glass is covered with a film;

a light hole is formed in the bottom plate corresponding to the position of the curing light, so that the curing light is directly irradiated to the printing solution through the light hole for exposure and curing;

the bottom plate part is held in the mounting panel, and correspondingly, the middle part of mounting panel is provided with holds the bottom plate and with the recess of the external shape looks adaptation of bottom plate.

Further, the 3D printing liquid tank device also comprises a positioning component, wherein,

the positioning assembly comprises a photoelectric separation blade, an optical coupler and an optical coupler fixing seat for fixing the optical coupler;

the optical coupler fixing seats are arranged in parallel along the axial direction of the rotating shaft, one end of each optical coupler fixing seat is fixed on the mounting plate, and the other end of each optical coupler fixing seat is used for mounting an optical coupler;

the photoelectric retaining sheet is fixed on the outer end face of the bearing structure and extends into the optical coupler along the radial direction of the rotating shaft, and the photoelectric retaining sheet is matched with the optical coupler.

In a second aspect, the embodiment of the present invention further discloses a 3D printer, which includes a base, a printing mechanism, an optical mechanical module, a control mechanism, and the aforementioned 3D printing liquid tank device;

the 3D printing liquid tank device is arranged on the base through the mounting plate;

the printing mechanism is arranged on the base and positioned at the periphery of the 3D printing liquid tank device, and comprises a driving module and a printing plate, wherein the driving module is arranged in the direction vertical to the bottom of the liquid tank assembly, and the printing plate is arranged on the driving module in a sliding manner;

the printing plate is aligned to a printing area in the liquid tank assembly and is driven by the driving module to linearly reciprocate along the driving module to be close to or far away from the printing area;

The optical-mechanical module is arranged in the base, and a curing light outlet is aligned with the printing plate, so that the curing light is directly irradiated onto the printing solution through the 3D printing liquid groove device, and the printing solution is directly bonded on the printing plate after being cured;

the control mechanism is respectively connected with the printing mechanism, the optical machine module and the 3D printing liquid tank device and is used for controlling the actions of the printing mechanism, the optical machine module and the 3D printing liquid tank device.

Furthermore, the 3D printer further comprises a turnover mechanism arranged in the base, wherein the turnover mechanism is arranged on one side of the mounting plate, which is far away from the printing mechanism, and is used for driving the mounting plate to be separated from the solidified layer of the solidified printing model after printing is finished;

the turnover mechanism comprises a power push rod and a shaft structure, and the power push rod and the shaft structure are respectively arranged at two opposite ends of the same surface of the mounting plate;

the power push rod is arranged in the direction perpendicular to the bottom of the liquid tank assembly, the power end of the power push rod is fixed to the base, the output end of the power push rod is fixedly connected with the mounting plate and used for pulling the corresponding end of the mounting plate to move, and then the 3D printing liquid tank device is driven to rotate along the shaft structure.

On the other hand, the embodiment of the invention also provides a 3D printing method, which includes:

step 1, a control mechanism controls a printing plate in a printing mechanism to move towards a direction close to a printing area in a liquid tank assembly, and the movement is stopped until the distance between the printing plate and the upper surface of the printing area is one printing layer thickness; the control mechanism controls the driving assembly to drive the liquid tank assembly to do reciprocating swing motion with a preset angle, and controls the scraper assembly to scrape the printing solution in the printing area in the liquid tank assembly to be one layer thick;

step 2, after the liquid tank assembly stops swinging, the control mechanism controls the optical-mechanical module to emit curing light to penetrate through the bottom of the liquid tank assembly and directly irradiate the printing solution to cure the printing solution, and the cured printing model is bonded on a printing plate to obtain a printing model curing layer;

step 3, controlling a control mechanism to control a power push rod to pull a mounting plate so as to drive the 3D printing liquid tank device to perform turnover motion around a shaft structure, so that a printing model curing layer is separated from the bottom of the liquid tank assembly;

step 4, after the 3D printing liquid tank device is turned to a preset position, the control mechanism controls the printing plate in the printing mechanism to move in the direction of driving the printing model curing layer to be far away from the bottom of the liquid tank assembly, and the printing model curing layer is thoroughly separated from the liquid tank assembly;

And 5, after the curing layer of the model to be printed is thoroughly separated from the liquid tank assembly, controlling a mechanism to control a power push rod to pull a mounting plate so as to drive the 3D printing liquid tank device to perform reset motion around the shaft structure until the 3D printing liquid tank device is restored to an initial state.

Further, the 3D printing method further includes the following steps occurring after the step 5:

counting the printing times;

judging whether the printing times reach a preset value or not;

when the printing times reach the preset value, the driving assembly drives the liquid tank assembly to rotate for 360 degrees in the whole circle, so that the printing solution is stirred more fully.

Further, in the above-mentioned case,

the step that control mechanism control drive assembly drove the cistern subassembly and does the back and forth swing motion of predetermineeing the angle to control the scraper subassembly and strickle off the printing solution of printing the region in the cistern subassembly and be a layer thickness specifically includes:

the position of the printing area, which is aligned with the curing light, is an initial position, and the printing area is initially positioned on one side of the scraper component;

the liquid tank assembly is driven by the driving assembly to rotate towards the scraper assembly by a preset angle, and when the preset angle is reached, the liquid tank assembly rotates reversely by the preset angle to drive the printing area to return to the initial position;

During rotation, the scraper component scrapes the printing solution of the printing area in the liquid groove component twice, so that the printing solution is one layer thick.

Compared with the prior art, the embodiment of the invention mainly has the following effects:

according to the 3D printing liquid tank device, the 3D printer and the 3D printing method, the driving assembly drives the liquid tank assembly to do reciprocating swing motion at the preset angle, the printing area passes through the scraper assembly twice in the process, and the scraper assembly scrapes the printing area twice.

Drawings

In order to illustrate the solution of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the invention, and that other drawings may be derived from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a perspective view of a 3D printing fluid bath apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of a 3D printing fluid bath apparatus (not including a doctor assembly) according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along the line C-C of FIG. 2;

FIG. 5 is a perspective view of a 3D printer in an embodiment of the invention;

FIG. 6 is a top view of a 3D printer (not including a printing mechanism) in an embodiment of the invention;

fig. 7 is a flowchart of a 3D printing method according to an embodiment of the present invention.

Description of reference numerals:

10. 3D printing liquid tank device; 11. a sump assembly; 111. a liquid tank body;

1114. an accommodating space; 112. glass; 113. a film; 114. a base plate; 1141. a light-transmitting hole;

115. pressing a ring; 12. mounting a plate; 121. a groove; 122. a through hole; 13. a drive assembly;

131. a rotating shaft; 132. a drive member; 133. a coupling; 134. a bearing structure;

135. a motor fixing seat; 14. a scraper assembly; 141. a support; 142. a doctor blade;

143. an adjustment member; 15. a positioning assembly; 151. a photoelectric barrier sheet; 152. an optical coupler;

153. an optical coupler fixing seat; 20. a printing mechanism; 21. a drive module; 22. a fixed seat;

23. printing a plate; 30. a base; 40. an opto-mechanical module; 41. curing the light outlet;

50. A turnover mechanism; 51. a power push rod; 52. a shaft structure; 521. a fixed block;

53. a guide connection assembly; 8. a print area.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprising" and "having," and any variations thereof, in the description and claims of the present invention and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the relevant drawings.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a perspective view of a 3D printing liquid bath device according to an embodiment of the present invention, fig. 2 is a top view (not including a scraper component) of the 3D printing liquid bath device according to the embodiment of the present invention, fig. 3 is a cross-sectional view taken along a direction a-a in fig. 2, and fig. 4 is a cross-sectional view taken along a direction C-C in fig. 2. As shown in fig. 1, the present invention provides a 3D printing liquid tank device, which includes a liquid tank assembly 11 for containing printing solution, a mounting plate 12, a driving assembly 13, and a scraper assembly 14 for scraping the printing solution flat.

The liquid tank assembly 11 and the driving assembly 13 are respectively located on two opposite sides of the mounting plate 12, the liquid tank assembly 11 is partially accommodated in the mounting plate 12, and correspondingly, a groove 121 which accommodates the liquid tank assembly 11 and is matched with the peripheral shape of the liquid tank assembly 11 is arranged in the middle of the mounting plate 12.

In this embodiment, an optical-mechanical module 40 (refer to fig. 5, fig. 5 is a perspective view of the 3D printer in the embodiment of the present invention) emitting curing light is disposed below the mounting plate 12, and a curing light outlet 41 is directed to the mounting plate 12, the curing light passes through the mounting plate 12 and the bottom of the liquid tank assembly 11 from below the mounting plate 12 and is directly incident to the printing solution for exposure and curing, in order to enable the curing light to smoothly pass through the mounting plate 12 and the bottom of the liquid tank assembly 11, optionally, the bottom of the liquid tank assembly 11 is completely transparent or transparent corresponding to the position of the curing light, and in order to avoid blocking the curing light, the transparent area of the liquid tank assembly 11 preferably covers the area of the curing light completely. The mounting plate 12 is made of opaque materials, and the mounting plate 12 is provided with a through hole 122 for passing the curing light at a position of the liquid tank assembly 11 corresponding to the curing light, so that the curing light passes through the through hole 122 and the transparent bottom of the liquid tank assembly 11 to realize exposure and curing of the printing solution.

Optionally, the fluid bath assembly 11 comprises an opaque base plate 114, an annular fluid bath body 111 located on the base plate 114.

The bottom plate 114 and the liquid tank body 111 jointly enclose an accommodating space 1114 for accommodating printing solution; more specifically, the bottom plate 114, the annular liquid tank body 111, and the accommodating space 1114 are all circular in outer peripheral shape.

Alternatively, in other embodiments, the fluid bath assembly 11 may be an integrally formed circular bath.

As a first possible implementation manner of this embodiment, the bottom plate 114 is made of an opaque material, and a glass 112, specifically a high-transmittance glass, is disposed on the bottom plate 114 and located inside the liquid tank body 111; simultaneously be in the position that corresponds the curing light on bottom plate 114 is equipped with light trap 1141 to make the curing light penetrate printing solution directly through light trap 1141 and carry out the exposure solidification, in this embodiment, be equipped with the shallow slot that holds and fix glass 112 in the inside that bottom plate 114 upper surface is located cistern body 111, place glass 112 in the shallow slot, glass 112 corresponds and covers light trap 1141 comprehensively with the position that light trap 1141 is located, so that the curing light passes through light trap 1141 and transparent glass 112 penetrate printing solution directly and carry out the exposure solidification.

In this embodiment, the glass 112 may be directly contacted with the printing solution, but compared with the glass material, the solidified layer of the printing mold after solidification is more easily separated from the film material, so it is preferable that the upper surface of the glass 112 is further covered with a film 113, and the film 113 corresponds to the position of the light-transmitting hole 1141 and can completely cover the light-transmitting hole 1141, so that the solidified light can directly irradiate the printing solution through the light-transmitting hole 1141 and the transparent glass 112 and the film 113 for exposure and solidification. Specifically, a PEP transparent film may be adopted to cover the film 113 on the upper surface of the glass 112, the diameter of the film 113 is larger than that of the glass 112, in order to fix the film 113 and prevent the film 113 from moving when being separated from the cured printing model, at least two sinking grooves are arranged around the bottom of the annular liquid tank body 111, the periphery of the film 113 is compressed in each sinking groove through a pressing ring 115, and the film 113 is further compressed on the upper surface of the glass 112, in this embodiment, the glass 112 protrudes out of the bottom plate 114, so that the glass 112 has a pressing effect on the film 113, the film 113 can have a certain tension, and can be tightly attached to the glass 112, the printing precision is ensured, and the replacement and maintenance are convenient.

As a second possible implementation manner of this embodiment, the bottom plate 114 may be made of a transparent material, and the transparent film 113 may be directly disposed on the bottom plate 114, or the glass 112 and the film 113 may be disposed as described above, and since the bottom plate 114 is made of a transparent material, no additional opening is needed.

In the present embodiment, the bottom plate 114 is partially received in the mounting plate 12, and accordingly, the mounting plate 12 is provided with a groove 121 for receiving the bottom plate 114 and matching the outer shape of the bottom plate 114.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in the present embodiment, the output end of the driving assembly 13 passes through the mounting plate 12 and is fixedly connected to the bottom of the liquid bath assembly 11, and more specifically, the driving assembly 13 includes a rotating shaft 131, and the rotating shaft 131 passes through the mounting plate 12 and is fixedly connected to the bottom plate 114 of the liquid bath assembly 11 by bolts, rivets, or other fixing means. The mounting plate 12 is provided with a via hole for the output end to pass through.

The liquid tank assembly 11 is driven by the driving assembly 13 to do reciprocating swing motion with a preset angle, the scraper assembly 14 faces the bottom of the liquid tank assembly 11 and is aligned with a certain position of the printing area 8 within a radiation range in the reciprocating swing process, so that the printing area 8 passes through the scraper assembly 14 twice in the reciprocating swing process, the scraper assembly 14 scrapes the printing solution in the printing area 8 flat in the reciprocating swing process of the printing area 8, and the scraping is performed twice, the distance between the scraper assembly 14 and the bottom of the liquid tank assembly 11 is one layer thickness, and the printing solution in the printing area 8 is scraped flat to be one layer thickness.

The printing area 8 is a printing solution area to be exposed and cured in the liquid tank assembly 11, and moves along with the movement of the liquid tank assembly 11, the printing solution cannot move once laid in the liquid tank assembly 11, which is equivalent to being fixed with the liquid tank assembly 11, and the printing area 8 moves along with the movement of the liquid tank assembly 11 in the rotation process of the liquid tank assembly 11, in order to ensure normal exposure, the printing area 8 must be located in a transparent area of the liquid tank assembly 11, and the transparent area needs to be capable of completely covering the printing area 8 (see fig. 6 for a specific back-and-forth swinging principle, and fig. 6 is a top view of a 3D printer (not including a printing mechanism) in the embodiment of the present invention).

Specifically, the driving assembly 13 includes a rotating shaft 131 and a driving member 132;

one end of the rotating shaft 131 is connected to the driving member 132 through a coupling 133, the other end of the rotating shaft passes through the mounting plate 12 and is fixedly connected to the bottom of the liquid tank assembly 11, and the rotating shaft 131 drives the liquid tank assembly 11 to do reciprocating swing motion with a preset angle under the driving of the driving member 132.

Further, the rotating shaft 131 is further sleeved with a bearing structure 134 at a portion sandwiched between the mounting plate 12 and the coupler 133, and the bearing structure 134 in this embodiment may be an angular bearing structure.

Specifically, the angular bearing structure includes a bearing seat (not shown), a double-row angular contact bearing (not shown), a bearing end cover (not shown), and a bearing sleeve (not shown);

the double-row angular contact bearings are sleeved on the rotating shaft 131 back to back; can bear large axial force and certain radial force load, and has an inner diameter matched with the rotating shaft 131.

A shoulder is arranged at one end of the rotating shaft 131 close to the bottom plate 114, and one side of an inner ring of the angular contact bearing abuts against the shoulder surface of the shoulder;

one end of the rotating shaft 131, which is close to the coupler 133, is provided with a shrinking step, the bearing sleeve is sleeved on the rotating shaft 131, the inner end of the bearing sleeve abuts against the step surface, the cylinder end surface of the bearing sleeve abuts against the inner ring of the angular contact bearing, and the inner ring of the angular contact bearing is clamped together with the shoulder surface of the rotating shaft 131;

the bearing seat is of a cylindrical structure provided with a stepped opening, one end with a small diameter of the opening abuts against the mounting plate 12, the part with a large inner diameter of the cylindrical structure accommodates the angular contact bearing, one end of an outer ring of the angular contact bearing abuts against the stepped surface of the bearing seat, and the other end of the outer ring abuts against the bearing end cover;

The bearing end cover is a stepped flange sleeved on the periphery of the bearing sleeve, one end with a large opening diameter of the bearing seat is clamped in a stepped groove of the stepped flange, and a flange end of the stepped flange abuts against the other end of an outer ring of the angular contact bearing and fixes the outer ring of the angular contact bearing together with the bearing sleeve.

The angle bearing in the embodiment has the advantages of small and simple structure and cost saving.

The driving member 132 in this embodiment may be a speed reduction motor, an output end of the speed reduction motor is fixedly connected to the rotating shaft 131 through the coupling 133, a motor fixing seat 135 is further provided for fixing the speed reduction motor, and the speed reduction motor drives the liquid tank assembly 11 to perform a back-and-forth swinging motion at a preset angle under the program control of the control mechanism. The speed reducing motor has small rotating speed and large torque, and can drive the liquid tank assembly 11 with larger diameter to move in a rotating manner.

Referring to fig. 6, the size of the specific preset angle can be set according to the size of the printing breadth of the product and the actual requirement. The size of the printing breadth is related to the printing precision (the resolution ratio of an optical machine), the higher the printing precision is, the smaller the printing breadth is, and the printing precision is in inverse proportion to the printing breadth; different angles can be set according to the actual requirements of different products in terms of printing breadth and precision, and the angles can be 90-150 degrees, for example.

The printing format is a definite value under the condition of ensuring a certain printing precision, the printing precision is preferably 35 microns, and almost all printing format sizes can use 120 degrees.

The position of the printing area 8 aligned with the curing light is an initial position, and the printing area 8 is initially positioned on one side of the doctor blade assembly 14;

the liquid tank assembly 11 is driven by the driving assembly 13 to rotate towards the scraper assembly 14 for a preset angle at first, and when the preset angle is reached, the liquid tank assembly rotates reversely for the preset angle so as to drive the printing area 8 to return to the initial position;

during the rotation, the doctor assembly 14 scrapes the printing solution of the printing area 8 located in the liquid bath assembly 11 twice.

The back and forth swing motion in this embodiment specifically is that printing region 8 rotates from the initial position of aiming at ray apparatus module 40 and predetermines the angle, and the preset angle of reverse rotation returns to the initial position of aiming at ray apparatus module 40 again, and printing region 8 passes through scraper component 14 twice on the way, compares prior art's once strickles for print solution is more level and smooth, and back and forth swing self also can make print solution tend to level and smooth.

According to the 3D printing liquid tank device, the driving assembly 13 drives the liquid tank assembly 11 to do reciprocating swing movement with a preset angle, the scraper assembly 14 scrapes the printing area 8 twice, compared with one-time scraping in the prior art, the printing solution is smoother, and meanwhile, compared with the whole-circle rotation in the prior art, the double-time preset angle reduces the rotation time of the liquid tank assembly 11 and the printing area 8, and the printing efficiency is greatly improved.

Referring to fig. 1, fig. 5 and fig. 6, fig. 5 is a perspective view of a 3D printer according to an embodiment of the invention.

The scraper component 14 comprises a support 141, the support 141 comprises a vertical frame which is arranged on the mounting plate 12 and is positioned outside the liquid tank component 11, a transverse frame which extends into the tank of the liquid tank component 11 is arranged at the top end of the vertical frame, and a scraper blade 142 is arranged at the tail end of the transverse frame; specifically, two fixing plates which are parallel and perpendicular to the bottom of the liquid tank assembly 11 are arranged below the cross frame, the scraper blade 142 is placed between the two fixing plates, and a fastener transversely penetrates through the two fixing plates and the scraper blade 142 to mount and fix the scraper blade 142.

Preferably, in order to make the distance between the scraper blade 142 and the bottom of the liquid tank assembly 11 adjustable, an adjusting member 143 is provided on the top of the scraper blade 142 for adjusting the distance between the scraper blade 142 and the bottom of the liquid tank assembly 11, and specifically, in a possible embodiment, an adjusting screw 143 is used, the adjusting screw 143 is directed to the top of the scraper blade 142 through a cross frame, and the holes of the fixing plate and the scraper blade 142 through which the fastening members pass are provided in a long groove shape in a direction perpendicular to the bottom of the liquid tank assembly 11. The scraper blade 142 is pushed to move downward close to the bottom of the liquid tank assembly 11 by rotating the adjustment screw 143 to move downward, or the scraper blade 142 is pushed to move upward away from the bottom of the liquid tank assembly 11 by rotating the adjustment screw 143 to move upward.

Specifically, in this embodiment, the scraper 142 of the scraper assembly 14 faces the bottom of the liquid tank assembly 11 and is aligned with a certain position in the radiation range of the printing area 8 in the reciprocating swing process, in the reciprocating swing process of the printing area 8, the scraper 142 scrapes the printing solution in the printing area 8, in the scraping process, the distance from the bottom edge of the scraper 142 to the bottom of the liquid tank assembly 11 is one layer thickness, and the printing solution in the printing area 8 is scraped to be one layer thickness. .

Referring to fig. 2 and 3, the liquid bath apparatus 10 further includes a positioning assembly 15, wherein,

the positioning assembly 15 comprises a photoelectric barrier sheet 151, an optical coupler 152 and an optical coupler fixing seat 153 for fixing the optical coupler 152;

the optical coupler fixing seat 153 is arranged in parallel along the axial direction of the rotating shaft 131, one end of the optical coupler fixing seat is fixed on the mounting plate 12, and the other end of the optical coupler fixing seat is used for mounting an optical coupler 152;

the photoelectric barrier 151 is fixed on the outer end surface of the bearing structure 134 and extends into the optical coupler 152 along the radial direction of the rotating shaft 131, so as to be matched with the optical coupler 152.

When setting for initial position, photoelectricity separation blade 151 is located opto-coupler 152, liquid groove subassembly 11 is being done one round trip swing or one whole week rotation back, photoelectricity separation blade 151 can stretch into opto-coupler 152 once more in, make the light signal in the opto-coupler 152 change, opto-coupler 152 gives control mechanism with light signal transfer, control mechanism control drive assembly 13 stop motion plays the effect of accurate location, when the location is accomplished the back, begin 3D and print.

Referring to fig. 1 to 6, the present invention further provides a 3D printer, in this embodiment, the 3D printer includes a base 30, a printing mechanism 20, an optical mechanical module 40, a control mechanism (not shown), and the 3D printing liquid tank device 10 as described above;

wherein, the 3D printing liquid tank device 10 is arranged on the base 30 through the mounting plate 12;

the printing mechanism 20 is arranged on the base 30 and located at the periphery of the 3D printing liquid bath device 10, and includes a driving module 21 arranged along a direction perpendicular to the bottom of the liquid bath assembly 11 and a printing plate 23 slidably arranged on the driving module 21, the printing plate 23 is aligned with the printing area 8 during exposure and curing, and is driven by the driving module 21 to linearly reciprocate along the driving module 21 to approach or depart from the printing area 8;

since the fluid bath assembly 11 in this embodiment rotates with the print zone 8, the print zone 8 may not be aligned with the print plate 23 during rotation, but the print zone 8 is aligned with the print plate 23 when the exposure curing (i.e. printing) takes place.

Specifically, base 30 in this embodiment includes last diaphragm, lower diaphragm to and be located two risers between two diaphragms, and 3D prints cistern device 10 and passes through mounting panel 12 sets up on base 30's last diaphragm, and cistern assembly 11 protrusion in the top of last diaphragm, drive assembly 13 is vertical to be stretched into the inside of base 30, and motor fixing plate 135 among drive assembly 13 still is fixed with base 30's lower diaphragm to better fixed 3D prints cistern device 10.

Drive module 21 of printing mechanism 20 is fixed along vertical direction and is installed on the last diaphragm of base 30, including motor and lead screw, motor and screw connection have set firmly the lead screw slide on the lead screw, have set firmly fixing base 22 that is used for installing printing plate 23 on the lead screw slide, and the motor drives the lead screw up-and-down motion, and then drives printing plate 23 and slides about drive module 21 is vertical and is close to or keeps away from the printing region 8 in the cistern subassembly 11.

The optical-mechanical module 40 is disposed inside the base 30, and the curing light outlet 41 is aligned with the printing plate 23, so that the curing light can penetrate through the 3D printing liquid tank device 10 and directly irradiate onto the printing solution during exposure and curing, and the printing solution is directly adhered to the printing plate 23 after being cured;

the control mechanism is respectively connected with the printing mechanism 20, the optical mechanical module 40 and the 3D printing liquid tank device 10 and is used for respectively controlling the actions of the printing mechanism 20, the optical mechanical module 40 and the 3D printing liquid tank device 10.

In other embodiments, the 3D printer further comprises a turnover mechanism 50 disposed in the base 30;

the turnover mechanism 50 is arranged on one side of the mounting plate 12, which is away from the printing mechanism 20, and is used for driving the mounting plate 12 to be separated from the solidified layer of the solidified printing model after printing is finished;

The turnover mechanism 50 includes a power push rod 51 and a shaft structure 52, the power push rod 51 and the shaft structure 52 are respectively disposed at two opposite ends of the same surface of the mounting plate 12, and the shaft structure 52 is further disposed at an included angle between the mounting plate 12 and the inside of the base 30. Specifically, in the present embodiment, the power push rod 51 and the shaft structure 52 are respectively disposed at opposite ends of the lower surface of the mounting plate 12.

The power push rod 51 is arranged along a direction perpendicular to the bottom of the liquid bath component 11, and a power end is fixed on the base 30.

Specifically, the shaft structure 52 includes two fixing blocks 521 (see fig. 1 and 5) fixed at an included angle between the mounting plate 12 and the inside of the base 30, and a shaft (not shown) movably installed in the two fixing blocks 521, and an axial direction of the shaft structure 52 is parallel to a long side direction of the power push rod 51, so that the power push rod 51 can pull the mounting plate 12 to move downward and turn over along the shaft.

The power end of the power push rod 51 is fixed on the lower transverse plate of the base 30, and the output end of the power push rod is fixedly connected with the mounting plate 12, and is used for pulling the corresponding end of the mounting plate 12 to move, so as to drive the 3D printing liquid tank device 10 to rotate along the shaft structure 52. Further, in order to make the movement more stable and accurate, the turnover mechanism 50 further includes a guiding connection assembly 53, one end of the guiding assembly 53 is connected with the output end of the power push rod 51, and the other end of the guiding assembly 53 is connected with the mounting plate 12, and is used for guiding the movement of the power push rod 51 and the mounting plate 12.

The power push rod 51 makes a linear reciprocating motion in a direction perpendicular to the bottom of the liquid bath assembly 11, pulls the mounting plate 12 to rotate along the shaft structure 52, and further drives the 3D printing liquid bath device 10 to rotate, so that a cured layer of the printing model in the 3D printing liquid bath device 10 after curing is separated from the bottom of the liquid bath assembly 11.

The control mechanism is further connected with the turnover mechanism 50 and used for controlling the action of the turnover mechanism 50. Specifically, the control mechanism is connected to the power push rod 51 and is configured to control the motion of the power push rod 51.

After printing the completion, the printing model solidified layer after the solidification bonds on printing board 23, before printing board 23 does not move, adopt earlier tilting mechanism 50 to make the bottom of printing the model solidified layer and cistern assembly 11 take place the separation earlier, then do the motion of keeping away from the bottom of cistern assembly 11 through printing board 23, increased the success rate of the bottom separation of printing the model solidified layer and cistern assembly 11, ensure that both can effectively separate.

More specifically, since the printing area 8 is generally rectangular, the printing plate 23 is also generally rectangular, and the long side of the power pusher 51 is parallel to the long side of the printing plate 23, when the printing area is turned over, the short side direction of the printing area 8 is turned over and separated, so that the separation time is short, and the separation efficiency is high.

The present invention further provides a 3D printing method, referring to fig. 7, fig. 7 is a flowchart of the 3D printing method in the embodiment of the present invention, where the method includes:

step 1, the control mechanism controls the printing plate 23 in the printing mechanism 20 to move towards the direction close to the printing area 8 in the liquid tank assembly, and the movement is stopped until the distance between the printing plate and the upper surface of the printing area 8 is one printing layer thickness; the control mechanism controls the driving component 13 to drive the liquid tank component 11 to do reciprocating swing motion with a preset angle, and controls the scraper component 14 to scrape the printing solution in the printing area 8 in the liquid tank component 11 to be one layer thickness.

Specifically, the step of controlling the driving component 13 to drive the liquid tank component 11 to make reciprocating swing motion at a preset angle by the control mechanism, and controlling the scraper component 14 to scrape the printing solution in the printing area 8 in the liquid tank component 11 to one layer thickness specifically includes:

the position of the printing area 8 aligned with the curing light is an initial position, and the printing area 8 is initially positioned on one side of the doctor blade assembly 14;

the liquid tank assembly 11 is driven by the driving assembly 13 to rotate towards the scraper assembly 14 for a preset angle at first, and when the preset angle is reached, the liquid tank assembly rotates reversely for the preset angle so as to drive the printing area 8 to return to the initial position;

During the rotation, the doctor assembly 14 scrapes the printing solution of the printing area 8 located in the liquid bath assembly 11 twice to make the printing solution one layer thick.

In step 1, the size of the preset angle can be set according to the size of the printing breadth of the product and the actual requirement. The size of the printing breadth is related to the printing precision (the resolution ratio of an optical machine), the higher the printing precision is, the smaller the printing breadth is, and the printing precision is in inverse proportion to the printing breadth; different angles can be set according to the actual requirements of different products in terms of printing breadth and precision, and for example, the preset angle can be 90-150 degrees.

The printing format is a definite value under the condition of ensuring a certain printing precision, the printing precision is preferably 35 microns, and almost all printing format sizes can use 120 degrees. In this embodiment, the predetermined angle is 120 degrees.

The printing plate 23 and the flume assembly 11 can move simultaneously or separately, and the simultaneous movement can reduce time and improve efficiency.

And 2, after the liquid tank assembly 11 stops swinging, the control mechanism controls the optical-mechanical module 40 to emit curing light to penetrate through the bottom of the liquid tank assembly 11 and directly irradiate the curing light to the printing solution so as to cure the printing solution, and the cured printing model is bonded on the printing plate 23 to obtain a cured layer of the printing model.

And 3, controlling a mechanism to control the power push rod 51 to pull the mounting plate 12 so as to drive the 3D printing liquid tank device 10 to perform turnover motion around the shaft structure 52, so that the printing model cured layer is separated from the bottom of the liquid tank assembly 11.

And 4, after the 3D printing liquid tank device 10 is turned to the preset position, the control mechanism controls the printing plate 23 in the printing mechanism 20 to move in the direction of driving the printing model curing layer to be far away from the bottom of the liquid tank assembly 11, and the printing model curing layer is completely separated from the liquid tank assembly 11.

And 5, after the curing layer of the model to be printed is completely separated from the liquid tank assembly 11, controlling the mechanism to control the power push rod 51 to pull the mounting plate 12 so as to drive the 3D printing liquid tank device 10 to perform reset motion around the shaft structure 51 until the 3D printing liquid tank device 10 returns to the initial state.

And 6, repeating the steps 2 to 5 to perform second printing, and circularly reciprocating until the printing is finished.

Further, in order to make the printing solution more uniformly distributed from sufficient stirring, the 3D printing method further includes the following steps after the step 5:

step 7, counting the printing times;

judging whether the printing times reach a preset value or not;

when the number of printing times reaches a preset value, the driving component 13 drives the liquid tank component 11 to rotate for 360 degrees in a whole circle, so that the printing solution is stirred more fully.

The preset times can be a certain numerical value of 20-50, and are specifically set according to actual conditions.

According to the 3D printing method provided by the invention, the driving assembly 13 drives the liquid tank assembly 11 to do reciprocating swing motion with a preset angle, and the scraper assembly 14 scrapes the printing area 8 twice, so that compared with the one-time scraping in the prior art, the printing solution is smoother, the rotation time of the liquid tank assembly 11 and the printing area 8 is reduced, and the printing efficiency is greatly improved;

after the primary curing is completed, the power push rod 51 is adopted to pull the mounting plate 12 so as to drive the 3D printing liquid tank device 10 to perform turnover motion around the shaft structure 52, so that the printing model curing layer is separated from the film 113, and then the printing model curing layer is driven by the printing plate 23 to move and be separated from the film 113, so that the separation effectiveness is increased;

after printing for the preset number of times, the driving component 13 drives the liquid tank component 11 to rotate for 360 degrees in the whole circle, so that the printing solution can be stirred more fully and distributed more uniformly.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention without limiting its scope. This invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents may be substituted for elements thereof. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.