CN112606388A

CN112606388A - Photocuring 3D printer

Info

Publication number: CN112606388A
Application number: CN202011381561.2A
Authority: CN
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 张晓明
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-06
Also published as: WO2022110480A1

Abstract

An embodiment of the present invention provides a photocuring 3D printer, including: the device comprises a Z-axis mechanism, a curing processing table, an LCD display screen, a trough, a forming platform and a light source mechanism; the solidification processing table is connected to the Z-axis mechanism, the LCD screen is arranged on the solidification processing table, the material groove is arranged at the top end of the LCD screen, and the forming platform is connected to the Z-axis mechanism and configured to move up and down along the Z-axis mechanism above the solidification processing table; light source mechanism locates the below of solidification processing platform, light source mechanism includes integral type light source subassembly, the speculum, the light that integral type light source subassembly transmitted pierces through forming platform in proper order after the speculum reflects, behind the LCD display screen, with the image projection that shows on the LCD display screen to the silo, it is through adopting the integral type light source as light source mechanism light source, the light intensity difference between the different lamp pearls of solution that can be fine, the relative light intensity of whole exposure area is even not had sudden change border, the shaping precision is high, it is with high costs to solve the photocuring, the poor problem of quality.

Description

Photocuring 3D printer

Technical Field

The invention relates to the technical field of 3D printing, in particular to a photocuring 3D printer.

Background

With the appearance of black and white LCD screens, the service life of the black and white LCD screens is prolonged continuously due to the increase of light transmittance, and the LCD screens have obvious advantages in the fields of resolution, printing precision, molding area and price in the field of photocuring, but the black and white LCD screens have higher requirements on the power, uniformity and collimation of an ultraviolet light source due to the increase of the molding area of the LCD screens. At present, most manufacturers adopt a distributed area exposure splicing technology, namely, a plurality of ultraviolet lamp beads are uniformly arranged in an array mode, and the defects are as follows: the light intensity of the splicing region between the lamp beads is extremely uneven; any damaged lamp bead can cause that one area can not be normally used completely; the difference between the lamp beads causes the optical difference between different areas to have obvious abrupt boundaries.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a photocuring 3D printer to solve the technical problem that the existing light source is uneven, so that the LCD photocuring quality is poor.

In order to achieve the purpose, the invention adopts the following technical scheme:

an embodiment of the present invention provides a photocuring 3D printer, including: the device comprises a Z-axis mechanism, a curing processing table, an LCD display screen, a trough, a forming platform and a light source mechanism; the solidification processing table is connected to the Z-axis mechanism, the LCD screen is arranged on the solidification processing table, the material groove is arranged at the top end of the LCD screen, and the forming platform is connected to the Z-axis mechanism and configured to move up and down along the Z-axis mechanism above the solidification processing table;

the light source mechanism is arranged below the curing processing table and comprises an integral light source component and a reflector, and light rays emitted by the integral light source component penetrate through the forming platform and the LCD display screen in sequence after being reflected by the reflector, and then the image displayed on the LCD display screen is projected onto the trough.

The integrated light source assembly is connected to the lower end of the curing workbench.

And a Fresnel lens is arranged below the LCD display screen and is used for collimating the light rays emitted by the integral light source component and reflected by the reflector.

Wherein the integral light source assembly comprises: the circuit board and connect in a plurality of matrix distribution's on the circuit board ultraviolet lamp pearl.

The lamp comprises a circuit board and is characterized by further comprising a light screen, wherein a plurality of through holes corresponding to the lamp beads are formed in the light screen, and the light screen is connected to the circuit board.

Wherein, the reflecting surface of the reflector is provided with a coating layer.

Wherein, the shaping platform includes: the cantilever is connected with the Z-axis mechanism, the connecting seat is connected with the cantilever, and the curing plate is connected with the connecting seat.

Wherein, Z axle mechanism includes: the support arm, connect in guide rail on the support arm, sliding connection in slider on the guide rail and connect in actuating mechanism on the support arm, the cantilever connect in the slider with actuating mechanism's lift end.

The light source mechanism further comprises a heat radiating fin, and the integral light source assembly is connected to the heat radiating fin.

Wherein the heat sink includes: the radiating fin body is provided with a connecting surface for connecting the integral light source assembly, a light blocking eave is arranged above the connecting surface, and light rays emitted by the integral light source assembly are perpendicular to the connecting surface.

Compared with the prior art, the photocuring 3D printer of this embodiment, it is through adopting the integral type light source as light source mechanism light source, the light intensity difference between different lamp pearls of solution that can be fine, and the relative light intensity of whole exposure area is even not have sudden change boundary.

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

Drawings

Fig. 1 is a schematic overall structure diagram of a photocuring 3D printer according to the present invention.

Fig. 2 is a schematic side view of a photocuring 3D printer according to the present invention.

Fig. 3 is a schematic structural diagram of a cantilever portion of the photocuring 3D printer according to the present invention.

Fig. 4 is a schematic structural diagram of a connecting seat part of the photocuring 3D printer of the invention.

Fig. 5 is a schematic structural diagram of a curing plate part of the photocuring 3D printer of the present invention.

Fig. 6 is a schematic structural diagram of a part of a cartridge of the photocuring 3D printer according to the present invention.

Fig. 7 is a schematic diagram of a light source mechanism part of the photocuring 3D printer of the present invention.

Fig. 8 is a schematic view of a partial structure of an integral light source assembly of the photocuring 3D printer according to the present invention.

Fig. 9 is a partially exploded view of an integrated light source and a heat sink of the photocuring 3D printer according to the present invention.

Fig. 10 is a schematic side view of a heat sink body part of a photo-curing 3D printer according to the present invention.

Fig. 11 is a schematic structural diagram of a light shielding plate portion of the photocuring 3D printer of the present invention.

Fig. 12 is a schematic diagram of the operation of the photocuring 3D printer of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 1 to 11, the present embodiment provides a photocuring 3D printer, which includes: a material groove 7, an LCD display screen 8, a curing processing table 5, a light source mechanism 6, a forming platform 4 and a Z-axis mechanism 3; the solidification processing table 5 is connected to the Z-axis mechanism 3, the LCD display screen 8 is arranged on the solidification processing table 5, the trough 7 is arranged at the top end of the LCD display screen 8, and the forming platform 4 is connected to the Z-axis mechanism 3 and configured to move up and down along the Z-axis mechanism 3 above the solidification processing table 5.

Referring to fig. 7 to 11 again, the light source mechanism 6 includes: the integrated light source assembly 62, the reflector 63 and the collimating lens 64, light emitted by the integrated light source assembly 62 is reflected to the collimating lens 64 through the reflector 63, the collimating lens 64 is used for collimating the reflected light, and the collimated light is applied to LCD photocuring. The light source mechanism 6 is arranged below the tertiary curing processing table 5, and light rays emitted by the integral light source assembly 62 penetrate through the forming platform 5 and the LCD display screen 8 in sequence after being reflected by the reflector, so that images displayed on the LCD display screen are projected to the trough 7.

Further, the photocuring 3D printer further comprises a base 1, wherein the reflector 63 is connected to the base 1, and the integral light source assembly 62 is connected to the lower end of the curing processing table 5.

Referring again to fig. 8, the integral light source module 62 includes: circuit board 621 and matrix distribution connect in lamp pearl 622 on the circuit board 621. In this embodiment, the lamp bead 622 is an ultraviolet lamp bead. The lamp bead array that the matrix distributes singly adopts small-angle multicore array encapsulation, guarantees that single lamp bead shaping area illuminance is even, adopts many lamp bead arrays again to guarantee shaping area light source intensity. Wherein, the circuit board 621 is further provided with a plurality of first connection holes 6211.

In order to improve the reflection effect, a coating layer is arranged on the reflection surface of the reflector 63.

In this embodiment, the collimating lens 64 is a fresnel lens.

Referring to fig. 9 and 10 again, the photocuring 3D printer further includes a heat sink 61, and the integral light source assembly 62 is connected to the heat sink 61. The heat sink 61 is used to dissipate heat generated in the operation of the integral light source assembly 62.

Specifically, the heat sink 61 includes: the heat sink body 611, the heat sink body 611 has a connection surface 6112 for connecting the integral light source assembly 62, and a light blocking eave 6111 is disposed above the connection surface 6112. The design of the light blocking eaves 6111 above the heat sink body 611 can effectively block the influence of the light source lateral redundant light source on the printing process. The integral light source module 62 emits light perpendicular to the connecting surface 6112.

Wherein, an air-cooled or water-cooled channel 6113 is further arranged on the heat sink body 611. The radiating fin adopts water cooling or forced air cooling to reduce lamp pearl array heat and guarantee lamp pearl array life-span.

Referring to fig. 11 again, the photo-curing 3D printer of the embodiment further includes a light shielding plate 65, a plurality of through holes 651 corresponding to the lamp beads 622 are disposed on the light shielding plate 65, and the light shielding plate 65 is connected to the circuit board 621. The light screen 65 guarantees that each lamp bead 622 emits light at angle consistency, and the light screen 65 shields some excessive light rays which influence each other between the lamp beads 622, so that the problem of mutual interference of the lamp beads is solved.

The light shielding plate 65 is further provided with a second connection hole 652 corresponding to the first connection hole 6211, and the light shielding plate 65 is connected to the circuit board 621 through screws penetrating through the first connection hole 6211 and the second connection hole 652.

Referring to fig. 1 and 2 again, the reflector 63 is connected to the base 1, the reflector 63 is connected to a fresnel lens at an angle capable of reflecting the maximum amount of the ultraviolet light emitted from the integral light source assembly 62, the integral light source assembly 62 is connected to the curing worktable 5, and the collimating lens 64 is connected to the lower surface of the curing worktable 5. Specifically, the curing workbench 5 is further provided with a slot 51 for placing the LCD, and the collimating lens 64 is located below the slot 51. And the trough 7 is located on the upper surface of the LCD.

Wherein the forming table 4 comprises: a cantilever 41, a connecting base 42 and a curing plate 43, wherein the cantilever 41 is connected to the Z-axis mechanism 3, the connecting base 42 is connected to the cantilever 41, and the curing plate 43 is connected to the connecting base 42.

Specifically, referring to fig. 3 to 5 again, the suspension 41 includes a rear plate 411, a pair of left and

right plates

412 and 413 extending perpendicularly from the rear plate 411, and a front plate 414 connected between the left and

right plates

412 and 413, wherein an upper edge of the front plate 414 and an upper edge of a front end of the left and

right plates

412 and 413 together form a connecting platform 415. The connection seat 42 includes a top plate 422, a bottom plate 423, and a vertical plate 421 connected between the top plate 422 and the bottom plate 423. The top plate 422 is connected to the connecting table 415, and the connecting base 42 is connected to the suspension arm 41 through the screw 44, and by adjusting the screw 44, the horizontal relative position of the connecting base 42 with respect to the suspension arm 41 can be changed.

The curing sheet 43 includes: the plate body part 431 is connected to a left plate part 432 and a right plate part 433 on the upper plate surface of the plate body part 431, two waist-shaped holes 4321 are respectively formed in the left plate part 432 and the right plate part 433, the left plate part 432 and the right plate part 433 are connected to the bottom 423 of the connecting seat 42 and connected through screws, and the horizontal adjustment of the plate body part 431 is achieved through the matching of the waist-shaped holes 4321 and the screws. When the LCD is cured, the plate portion 431 is lowered and deeply inserted into the photosensitive resin in the cassette by the Z-axis mechanism 3.

As shown in fig. 1, the Z-axis mechanism 3 includes: a guide rail 32 connected to the support arm 2, a slider 33 slidably connected to the guide rail 32, and a driving mechanism 31 connected to the support arm 2, wherein the suspension arm 41 is connected to the slider 33 and a lifting end of the driving mechanism 31.

In this embodiment, the driving mechanism 31 is a ball screw, which has the advantages of stable operation and high progress. The number of the guide rails 32 is two, and the guide rails are respectively positioned on two sides of the ball screw, so that the running stability of the Z-axis mechanism 3 is further improved.

Wherein, in order to save the processing cost, the supporting arm 2 adopts aluminium or aluminium alloy section.

Compared with the prior art, the light-cured 3D printer of the embodiment adopts the integral light source, so that the light intensity difference among different lamp beads can be well solved; every lamp pearl can both optically cover whole exposure area, and individual lamp pearl damages and does not influence the complete machine work, and whole exposure area is even not have sudden change boundary to the light intensity, adopts ball screw to drive the shaping platform simultaneously and goes up and down, and its operation is stable, and control accuracy has solved the photocuring of LCD screen and has costed height, the poor problem of quality.

The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.

Claims

1. A photocuring 3D printer, comprising: the device comprises a Z-axis mechanism, a curing processing table, an LCD display screen, a trough, a forming platform and a light source mechanism; the solidification processing table is connected to the Z-axis mechanism, the LCD screen is arranged on the solidification processing table, the material groove is arranged at the top end of the LCD screen, and the forming platform is connected to the Z-axis mechanism and configured to move up and down along the Z-axis mechanism above the solidification processing table;

2. The photocuring 3D printer of claim 1, further comprising a base, the mirror being attached to the base, the integrating light source assembly being attached to a lower end of the curing station.

3. The photocuring 3D printer of claim 1, wherein a fresnel lens is further disposed below the LCD display screen to collimate light emitted by the integrating light source assembly and reflected by the reflector.

4. The photocuring 3D printer of claim 3, wherein the integral light source assembly comprises: the circuit board and connect in a plurality of matrix distribution's on the circuit board ultraviolet lamp pearl.

5. The photocuring 3D printer of claim 4, further comprising a light shield, wherein the light shield is provided with a plurality of through holes corresponding to the ultraviolet lamp beads, and the light shield is connected to the circuit board.

6. The photocuring 3D printer of claim 1, wherein a coating is provided on the reflective surface of the mirror.

7. The photocuring 3D printer of claim 1, wherein the molding platform comprises: the cantilever is connected with the Z-axis mechanism, the connecting seat is connected with the cantilever, and the curing plate is connected with the connecting seat.

8. The photocuring 3D printer of claim 6, wherein the Z-axis mechanism comprises: the support arm, connect in guide rail on the support arm, sliding connection in slider on the guide rail and connect in actuating mechanism on the support arm, the cantilever connect in the slider with actuating mechanism's lift end.

9. The photocuring 3D printer of claim 1, wherein the light source mechanism further comprises a heat sink to which the integral light source assembly is attached.

10. The photocuring 3D printer of claim 9, wherein the heat sink comprises: the radiating fin body is provided with a connecting surface for connecting the integral light source assembly, a light blocking eave is arranged above the connecting surface, and light rays emitted by the integral light source assembly are perpendicular to the connecting surface.