CN218366519U

CN218366519U - Double-projection printer

Info

Publication number: CN218366519U
Application number: CN202222447562.3U
Authority: CN
Inventors: 陈珺
Original assignee: Xiamen Goofoo Technology Co ltd
Current assignee: Xiamen Goofoo Technology Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-01-24
Anticipated expiration: 2032-09-15

Abstract

The utility model relates to a 3D printing apparatus field especially relates to a double projection printer, and it includes resin tank, print platform, formation of image optical system and photographic fixing optical system, the resin tank intussuseption is filled with two ingredient photosensitive resin, two kinds of components of two ingredient photosensitive resin respectively with first wavelength light, second wavelength light interact; the imaging optical system projects light of a first wavelength toward the liquid surface of the resin, and the fixing optical system projects light of a second wavelength toward the liquid surface of the resin; the printing platform moves along the height direction of the resin tank. This type of printing mode has not only improved the location of the position of shining of current light and need accurate control on the energy transfer, and the shortcoming that the implementation cost is high has greatly made things convenient for the storage of the resin that adopts simultaneously, only can make the resin solidify under different specific wavelength, and normal storage environment can not exert an influence to it.

Description

Double-projection printer

Technical Field

The utility model relates to a 3D printing apparatus field especially relates to a double projection printer.

Background

Generally, a resin used in the prior art is a single-component resin, and can be solidified and molded only by being irradiated by a single projection light, and for the single-component resin, in order to be rapidly molded, the self energy receiving capability of the single-component resin needs to be more excellent, so that the single-component resin is easily directly acted with the outside to cause consumption when no extra storage means is adopted. The single-component resin has higher requirements on storage environment and transportation conditions. At present, a photo-curing forming method using a two-component photosensitive resin is also available, and the two-component photosensitive resin has two components, different components interact with light with different wavelengths to be activated, and the two components interact with each other to be cured and formed after being activated. In related studies, a transparent container is generally used to contain a two-component photosensitive resin, which is acted on by two different wavelengths of light, and is gradually molded from the middle of the two-component photosensitive resin toward the outside thereof. This requires precise control of the position of the light irradiation and energy transfer, and is costly to implement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the double-projection printer is convenient to implement, can ensure rapid forming and simultaneously avoids consumption caused by direct action of resin and the outside.

In order to solve the technical problem, the utility model discloses a technical scheme be: a double-projection printer comprises a resin tank, a printing platform, an imaging optical system and a fixing optical system, wherein double-component photosensitive resin is filled in the resin tank, and two components of the double-component photosensitive resin respectively act with first wavelength light and second wavelength light; the imaging optical system projects light of a first wavelength toward the liquid surface of the resin, and the fixing optical system projects light of a second wavelength toward the liquid surface of the resin; the printing platform moves along the height direction of the resin tank.

Further, the coverage of the first wavelength light projected by the fixing optical system on the resin liquid surface is larger than the coverage of the second wavelength light of the imaging optical system on the resin liquid surface.

Further, still including sinking the mechanism, imaging optical system and photographic fixing optical system all locate the resin bath top, sink the mechanism and locate in the resin bath, sink the mechanism and be connected in order to drive it and remove towards the resin bath tank bottom with print platform.

Further, the imaging optical system is disposed above the resin tank, and the fixing optical system is disposed obliquely above the resin tank.

Further, still include the scraper, the scraper is located resin liquid level department, the scraper moves along resin groove length direction.

The beneficial effects of the utility model reside in that: the double-component photosensitive resin is activated by first wavelength light and second wavelength light of an imaging optical system and a fixing optical system at the liquid level of the resin, and the light irradiation position does not need to be controlled because only the surface of the liquid level of the resin is activated; the thickness of each forming is adjusted by the fixed moving distance of the printing platform, so that the energy consumption is low and the control is easy; the printing mode of this type has not only improved the location and the energy transfer of the position of shining of current light and need accurate control, the shortcoming that implementation cost is high, has greatly made things convenient for the storage of the resin that adopts simultaneously, only can make the resin solidify under the specific wavelength of difference, and normal storage environment can not exert an influence to it.

Drawings

Fig. 1 is a schematic structural diagram of a dual projection printer according to an embodiment of the present invention.

Description of reference numerals:

1. a resin tank; 2. a printing platform; 3. an imaging optical system; 31. a first wavelength light; 4. a fixing optical system; 41. a second wavelength light; 5. a sinking mechanism; 6. and (4) scraping the blade.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, a dual projection printer includes a resin tank 1, a printing platform 2, an imaging optical system 3 and a fixing optical system 4, wherein the resin tank 1 is filled with a two-component photosensitive resin, and two components of the two-component photosensitive resin respectively interact with a first wavelength light 31 and a second wavelength light 41; the imaging optical system 3 projects a first wavelength light ray 31 toward the resin liquid surface, and the fixing optical system 4 projects a second wavelength light ray 41 toward the resin liquid surface; the printing platform 2 moves along the height direction of the resin tank 1.

From the above description, the beneficial effects of the present invention are: the first wavelength light 31 and the second wavelength light 41 of the imaging optical system 3 and the fixing optical system 4 are adopted to activate the two-component photosensitive resin at the liquid level of the resin, and the light irradiation position is not required to be controlled because only the surface of the liquid level of the resin is activated; the thickness of each molding is adjusted by the fixed moving distance of the printing platform 2, so that the energy consumption is low and the control is easy; the printing mode of this type has not only improved the location of the position of shining of current light and need accurate control on the energy transmission, and the shortcoming that the implementation cost is high has greatly made things convenient for the storage of the resin that adopts simultaneously, only can make the resin solidify under the specific wavelength of difference, and normal storage environment can not exert an influence to it.

Further, the coverage of the second wavelength light 41 projected by the fixing optical system 4 on the resin liquid surface is larger than the coverage of the first wavelength light 31 of the imaging optical system 3 on the resin liquid surface.

As is apparent from the above description, the projection of the second wavelength light 41 of the fixing optical system 4 on the resin liquid surface is used as fixing light for determining in advance the range required to act on the second wavelength light 41; the projection of the first wavelength light 31 of the imaging optical system 3 on the resin liquid surface is used as imaging light and is used for accurately selecting a required imaging shape within the coverage range of the first wavelength light 31; the coverage range of the second wavelength light 41 is larger than that of the first wavelength light, so that an operator does not need to accurately set the coverage range of the second wavelength light 41 and frequently debug the coverage range, and an error is generated; accurate imaging is achieved by the projection of the determined shape of the resin liquid surface of the first wavelength light ray 31 within the range of the second wavelength light ray 41.

Further, still include and sink mechanism 5, imaging optical system 3 and photographic fixing optical system 4 all locate resin tank 1 top, it locates in resin tank 1 to sink mechanism 5, it is connected in order to drive it towards the removal of 1 tank bottoms in resin tank with print platform 2 to sink mechanism 5.

As can be seen from the above description, the image forming optical system 3 and the fixing optical system 4 are disposed above the image forming tank in a sinking printing manner, and the printing platform 2 is driven by the sinking mechanism 5 to descend one by one according to the thickness of the printing layer. The printing mode of formula of sinking need not additionally to set up from the type, and printing quality is stable.

Further, the imaging optical system 3 is provided above the resin tank 1, and the fixing optical system 4 is provided obliquely above the resin tank 1.

As is apparent from the above description, the imaging optical system 3 and the fixing optical system 4 are arranged in a staggered manner, so that maintenance and repair are facilitated while mutual interference is avoided.

Further, the resin tank comprises a scraper 6, wherein the scraper 6 is arranged at the position of the liquid level of the resin, and the scraper 6 moves along the length direction of the resin tank 1.

As can be seen from the above description, through the arrangement of the scraper 6, the resin liquid level is leveled by the scraper 6, so as to ensure that the light projection is uniform and accurate.

Referring to fig. 1, the first embodiment of the present invention is:

the utility model discloses an use the scene to do: in photocuring printing, the resin is usually a single component, and the single component resin is easy to interact with the outside and is inconvenient to store; although the two-component photosensitive resin is not easy to interact with the outside, in the existing implementation mode, the projected light is required to be accurately positioned, the energy consumption is high, and the implementation cost is high.

The two-component photosensitive resin used in this example is a resin type commonly used in two-photon polymerization.

The two-component photosensitive resin has two components, wherein one component is used for acting with first wavelength light, and the other component is used for acting with second wavelength light, so that polymerization reaction is carried out, and the resin is solidified and molded.

In chinese patent application No. CN201880064139.9, a photopolymerizable composition, a material obtained by polymerizing the composition, and a 3D printing method using the composition, related techniques of two-photon polymerization are also mentioned, "3D microfabrication based on photopolymerization by multiphoton absorption is a technique invented in 1990 s based on nonlinear absorption of a photosensitizer. This technique is described in particular in documents US 8197722, US20040067451 or US 20110021653. This technique is very effective for three-dimensional printing of objects. However, this results in the photopolymerization being localized only at the focal point, that is, the photopolymerization is limited to volumes of very small size with sub-micron spatial resolution; the use of this particularly slow technique is therefore limited to the production of objects of small dimensions in the order of millimetres. Furthermore, there is a need for particularly powerful pulsed lasers, whose irradiance is typically in the order of TWatt/cm 2. "

The dual projection printer of the present embodiment includes a resin tank 1, a printing deck 2, an imaging optical system 3, a fixing optical system, a sinking mechanism 5, and a doctor blade 6.

The resin tank 1 is filled with two components of photosensitive resin, and the two components of photosensitive resin respectively interact with the first wavelength light 31 and the second wavelength light 41; the imaging optical system 3 projects light rays of a first wavelength 31 toward the surface of the resin liquid, and the fixing optical system 4 projects light rays of a second wavelength 41 toward the surface of the resin liquid. Under the interaction of the first wavelength light 31 of the imaging optical system 3 and the second wavelength light 41 of the fixing optical system 4, a solidified shape can be formed in a certain distance between the liquid surface of the resin and the printing platform 2.

The coverage of the second wavelength light 41 projected by the fixing optical system 4 on the resin liquid surface is larger than the coverage of the first wavelength light 31 of the imaging optical system 3 on the resin liquid surface. By setting the coverage of the second wavelength light 41 of the fixing optical system 4, an operator does not need to accurately adjust the second wavelength light 41 of the fixing optical system 4, and only needs to ensure that the projection shape of the first wavelength light 31 of the imaging optical system 3 is accurate.

The scraper 6 is arranged at the liquid level of the resin, and the scraper 6 moves along the length direction of the resin tank 1. The scraper 6 levels the resin liquid level after the first wavelength light 31 and the second wavelength light 41 act on the resin for molding each time, so as to ensure the uniformity and accuracy of the next projection light.

Specifically, the imaging optical system 3 is provided above the resin tank 1, and the fixing optical system 4 is provided obliquely above the resin tank 1.

In this embodiment, a printing method of a sink type is adopted, and a printing method of a top-up type is also adopted, and in this case, the image forming optical system 3 and the fixing optical system 4 may be provided below the resin tank 1 correspondingly.

Taking a sunken printing mode as an example, the sunken mechanism 5 is arranged in the resin tank 1, and the sunken mechanism 5 is connected with the printing platform 2 to drive the sunken mechanism to move towards the bottom of the resin tank 1. Adopt the printing mode of formula of sinking, need not additionally to set up from the type, and print quality is more stable.

The utility model discloses a theory of operation does: before printing, the scraper 6 moves along the length direction of the resin tank 1 to level the liquid level of the resin; then the printing platform 2 moves downwards by the distance of the required printing layer thickness under the driving of the sinking mechanism 5, then the fixing optical system 4 projects a second wavelength light ray 41 with a larger coverage area towards the liquid surface of the resin, the imaging optical system 3 projects a first wavelength light ray 31 with a determined imaging shape towards the liquid surface of the resin, and at the moment, under the combined action of the first wavelength light ray 31 and the second wavelength light ray 41, the two-component photosensitive resin in the corresponding area is solidified and molded; then, the projection of the fixing optical system 4 and the imaging optical system 3 is stopped, the printing platform 2 is moved downwards again by the required printing layer thickness distance under the drive of the sinking mechanism 5, the scraper 6 moves along the length direction of the resin tank 1, the resin liquid level is leveled, and the projection of the fixing optical system 4 and the imaging optical system 3 is repeated.

Compared with the common single-component resin, the double-component photosensitive resin is not easy to react with the outside and is easy to store and transport.

To sum up, the utility model provides a double projection printer, in order to adopt the first wavelength light and the second wavelength light of imaging optical system and photographic fixing optical system to the activation of two ingredient photosensitive resin at resin liquid level, because only activate the resin liquid level surface, need not to control the light irradiation position; the thickness of each forming is adjusted by the fixed moving distance of the printing platform, so that the energy consumption is low and the control is easy; the printing mode of this type has not only improved the location of the position of shining of current light and need accurate control on the energy transmission, and the shortcoming that the implementation cost is high has greatly made things convenient for the storage of the resin that adopts simultaneously, only can make the resin solidify under the specific wavelength of difference, and normal storage environment can not exert an influence to it.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A double projection printer is characterized by comprising a resin tank, a printing platform, an imaging optical system and a fixing optical system, wherein double-component photosensitive resin is filled in the resin tank, and two components of the double-component photosensitive resin respectively act with first wavelength light and second wavelength light; the imaging optical system projects light of a first wavelength toward the liquid surface of the resin, and the fixing optical system projects light of a second wavelength toward the liquid surface of the resin; the printing platform moves along the height direction of the resin tank.

2. The dual projection printer according to claim 1, wherein a coverage of the second wavelength light projected by the fixing optical system on the resin liquid surface is larger than a coverage of the first wavelength light of the imaging optical system on the resin liquid surface.

3. The dual-projection printer of claim 1, further comprising a sinking mechanism, wherein the imaging optical system and the fixing optical system are both disposed above the resin tank, the sinking mechanism is disposed in the resin tank, and the sinking mechanism is connected to the printing platform to move the printing platform toward the bottom of the resin tank.

4. The dual projection printer of claim 1, wherein the imaging optical system is disposed above the resin tank, and the fixing optical system is disposed obliquely above the resin tank.

5. The dual projection printer of claim 1, further comprising a doctor blade disposed at the resin level, the doctor blade moving along the length of the resin vat.