WO2018166374A1 - Photocuring 3d printer and resin pool component thereof - Google Patents

Abstract

A photocuring 3D printer and a resin pool component thereof. The resin pool component comprises a pool body (1) for accommodating a resin material and with a pool bottom for transmitting light, and a mounting base (5) for detachably mounting the pool body (1); a display screen (2) is provided between the pool body (1) and the mounting base (5); and a cooling structure for dissipating heat is provided below the display screen (2). By providing the cooling structure for dissipating heat below the display screen, the heat dissipating capacity of the resin component is improved, and in a 3D printing process, the curing time of each layer of resins is prominently prolonged, and the working efficiency of 3D printing is improved.

Description

Light curing 3D printer and its resin pool assembly

The present application claims priority to Chinese Patent Application No. 200910151148.9, entitled "Photocuring 3D Printer and Its Resin Pool Assembly", filed on March 14, 2017, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present disclosure relates to the field of 3D printing, and in particular to a photocurable 3D printer and a resin pool assembly thereof.

Background technique

In the field of 3D (three dimensional) printing, rapid prototyping technology can be divided into various categories according to the materials used, molding methods, etc., among which photocuring rapid prototyping is more common. The principle of photocuring is: using a photosensitive resin (UV) in a fluid state to form a polymerization reaction under illumination, and irradiating the light source according to the cross-sectional shape of the object to be molded to solidify the resin in a fluid state. Specifically, the photocuring 3D printer transmits the cross-sectional pattern of the 3D printed object layer by layer to the display screen through the data transmission device, and then illuminates the display screen with the light of the corresponding wavelength, so that the liquid resin above the display screen follows the pattern. The curing is layer by layer, eventually forming the specified 3D printed object.

According to the above principle, a photo-curing 3D printer uses a resin pool in the photocuring molding process. In order to increase the speed of photocuring, it is necessary to simultaneously reduce the curing time of each layer and increase the intensity of the light source, which will cause the heat released during curing of the resin to be unable to spread out in a short time, and heat will be accumulated in the bottom of the resin pool, so that the resin pool The resin temperature rises and is distributed in a stepwise manner, and the closer to the bottom of the resin pool, the higher the temperature. In general, the maximum temperature at the bottom of the resin pool will exceed 120°. The polymer pool bottom is usually made of polymer oxygen permeable membrane. The polymer oxygen permeable membrane will wrinkle and deform under the high temperature environment exceeding 120°, which makes the resin pool not be used normally, which will eventually lead to failure of photocuring and damage of the resin pool. This increases the cost of use.

The currently used photocurable 3D printer has a long printing interval when each layer of resin is cured, so that heat is dissipated to avoid the above problems, but this method causes the working efficiency of the 3D printer to be greatly affected.

Summary of the invention

It is an object of the present disclosure to provide a resin cell assembly for a photocuring 3D printer that has a strong heat dissipation capability and can improve the efficiency and quality of 3D printing and curing.

In order to achieve the above object, the present disclosure provides a resin cell assembly for a photocuring 3D printer, the resin cell assembly including a cell body for accommodating a resin material and having a light transmissive bottom of the cell, disposed under the light transmissive cell bottom a display screen having a cooling structure for dissipating heat under the display screen, the cell body comprising a frame formed as a sidewall and a light transmissive layer formed as the bottom of the cell, the light transmissive layer being fixed On the bottom surface of the frame, the light transmissive layer is a polymer oxygen permeable membrane and is spaced apart from the display screen, the cooling structure includes a cooling substrate, and a sealing layer fixedly mounted with the cooling substrate, the sealing layer A layer is located between the display screen and the cooling substrate and forms a flow path for the coolant to flow therethrough.

Optionally, the cooling structure includes a cooling substrate, and the display screen is fixedly connected to the cooling substrate such that a flow path for the coolant to flow is formed between the display screen and the cooling substrate.

Optionally, the sealing layer is a glass film.

Optionally, the refractive index of the cooling liquid is substantially equal to the refractive index of the cooling substrate.

Optionally, there is no cavity between the cell body and the display screen, and there is no channel for charging or extracting gas.

Optionally, the cooling substrate is provided with a coolant inlet and a coolant outlet in communication with the flow passage, and the coolant inlet is in communication with an inlet conduit, and the coolant outlet is in communication with the outlet conduit.

Optionally, the display screen is an LCD display or an OLED display.

Optionally, it also includes:

a mounting seat comprising a return mounting portion and a supporting sidewall fixed under the retrofit mounting portion, the retrofit mounting portion matching a size of a frame of the pool body; for detachably mounting the pool Body and the display screen.

Another object of the present disclosure is to provide a photocurable 3D printer capable of improving 3D printing curing molding efficiency and curing molding quality.

In order to achieve the above other object, the present disclosure provides a photocurable 3D printer including the above-described resin pool assembly.

The present disclosure provides a cooling structure for heat dissipation under the display screen, thereby increasing the heat dissipation capability of the resin component, so that the time for completion of curing of each layer of resin is remarkably improved in the 3D printing process, and the work efficiency of 3D printing is improved. In addition, by disposing the cooling structure under the display screen, the light transmissive layer formed on the display screen and the pool body can be directly cooled and cooled, thereby avoiding wrinkles or deformation of the light transmissive layer due to high temperature, thereby ensuring light. The molding quality of the solidification molding reduces the damage to the resin pool, thereby reducing the cost of replacing the resin pool.

Other features and advantages of the present disclosure will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the disclosure, and are in the In the drawing:

1 is an exploded perspective view of one embodiment of a resin cell assembly for a photocuring 3D printer in accordance with the present disclosure;

2 is a schematic view showing the resin pool assembly of the photocuring 3D printer of FIG. 1 in an assembled state;

3 is an exploded perspective view of another embodiment of a resin cell assembly for a photocuring 3D printer in accordance with the present disclosure;

4 is a schematic cross-sectional view of a cooling substrate in a resin cell assembly for a photocuring 3D printer in accordance with the present disclosure;

5 is a schematic cross-sectional view of a resin cell assembly for a photocuring 3D printer according to the present disclosure, including only a display screen, a sealing layer, and a cooling substrate taken along the A-A direction;

6 is a schematic cross-sectional view of another embodiment of a resin cell assembly for a photocuring 3D printer according to the present disclosure, including a structure below the cell body taken along a direction perpendicular to the A-A direction;

7 is a schematic exploded view of a cell body in a resin cell assembly for a photocuring 3D printer in accordance with the present disclosure.

Description of the reference numerals

1 cell body 2 display 3 cooling substrate 4 sealing layer

5 Mounting seat 6 Buckle 7 Inlet duct 8 Outlet duct

11 frame 12 light transmissive layer 13 back type bead 14 seal

51 retrofit mounting section 52 support side wall 3a flow path 3b coolant inlet

3c coolant outlet

detailed description

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are not to be construed

In the present disclosure, the orientation words such as "up, down, left, and right" as used in the drawings generally refer to the upper, lower, left, and right in the drawings, and "inside and outside" refer to Internal and external with respect to the contour of the part.

1 to 7, the present disclosure relates to a resin pool assembly for a photocuring 3D printer and a photocuring 3D printer using the resin pool assembly. The resin pool assembly includes a pool body 1 for accommodating a resin material, and a mounting seat 5 for detachably mounting the pool body 1. That is, the cell body 1 is mounted on the mount 5 for 3D printing, and when the cell body 1 needs to be replaced, the cell body 1 can be detached from the mount 5. The specific detachable manner is as shown in FIG. 2, and the pool body 1 is detachably mounted on the mounting seat 5 by the lock 6. Although the fixing portion of the buckle 6 is fixed to the mounting seat 5 in FIG. 2, the engaging portion of the locking hook 6 mounted on the fixing portion can be pivoted relative to the fixing portion to engage with the pool body 1, However, in other modified embodiments, the fixing portion of the buckle 6 may also be mounted on the pool body 1 and the engaging portion is engaged with the mounting seat 5 to be detachably mounted. This disclosure does not limit the detachable mounting method.

Regarding the structure of the cell body 1, as shown in FIG. 7, a frame 11 formed as a side wall and a light transmissive layer 12 formed as a bottom of the cell may be included. The frame 11 can be made of various materials, and the light transmissive layer 12 is mainly made of a polymer oxygen permeable film. A plurality of bolt holes are formed in the light transmissive layer 12, and the light transmissive layer 12 is attached to the bottom surface of the casing 11 by bolts during installation. In a preferred embodiment, a back-type bead 13 is disposed under the light-transmitting layer 12, and a return-type seal 14 is disposed between the light-transmitting layer 12 and the frame 11, and the back-shaped bead 13 and the seal 14 correspond to each other. A hole is provided in the ground so that the sealing member 14, the light transmitting layer 12, and the back-shaped bead 13 can be fixed to the frame 11 together by bolts, thereby forming the cell body 1 having good sealing performance to prevent leakage of the resin material. For the structure of the mount 5, as shown in FIG. 1, the mount 5 may include a return mounting portion 51 and a support sidewall 52 fixed under the retrofit mounting portion 51. The return mounting portion 51 is matched to the size of the frame 11 of the pool body 1, and the support side wall 52 supports the entire resin pool assembly. Based on the specific structure of the above-described pool body 1 and the mount 5, the frame body 11 of the pool body 1 and the return mounting portion 51 of the mount 5 are detachably connected by the lock 6. Of course, in a variant embodiment, the fastening portion of the latch 6 can also be fastened to the support side wall 52.

In the present disclosure, a display screen 2 is disposed between the cell body 1 and the mount 5, and the light source emits light of a corresponding wavelength to illuminate the display screen 2 and penetrates the light transmissive layer 12 of the cell body 1, so that the resin material in the cell body 1 is made. Curing molding. The display screen 2 may include, for example, but not limited to, a liquid crystal display, an OLED screen (Organic Light Emitting Diode Display), and the like. As described above, heat is easily accumulated at the light permeable layer 12 of the cell body 1, deforming and wrinkling the light permeable layer 12, thereby affecting the curing molding efficiency and quality. To this end, the present disclosure is provided with a cooling structure for heat dissipation under the display screen 2. Due to the arrangement of the cooling structure, the heat dissipation capability of the resin component is increased, and in the 3D printing process, the time for completion of curing of each layer of the resin is remarkably improved, and the working efficiency of the 3D printing is improved. In addition, by disposing the cooling structure under the display screen 2, the display screen 2 and the light transmissive layer 12 can be directly cooled and cooled, thereby avoiding wrinkles or deformation of the light transmissive layer 12 due to high temperature, thereby ensuring the molding efficiency of the photocuring molding. And quality, reducing the damage to the resin pool, thereby reducing the cost of replacing the resin pool.

For the above cooling structure, it can be applied to various cooling forms, for example, it can be applied to liquid cooling or gas cooling. Preferably, the present disclosure employs liquid cooling to increase cooling efficiency. In a specific embodiment, the cooling structure of the present disclosure can be coupled to a cooling system of a photo-curing 3D printer that can include components such as pumps, heat sinks, fans, etc. for pumping coolant into the cooling structure. For the specific structure and the like of the cooling system, structures known in the prior art may be employed, and details are not described herein again.

Referring to Figures 1 and 2, an arrangement of the cooling structure is illustrated. In this embodiment, the cooling structure includes a cooling substrate 3, which is preferably a glass substrate, but is not limited to a glass substrate. As shown in FIGS. 5 and 6, the cooling substrate 3 is located below the display screen 2 and is fixed to the mount 5. Specifically, in the case where the mount 5 includes the return mounting portion 51, the return mounting portion 51 is formed with a step portion inside, and the periphery of the cooling substrate 3 can be fixed to the step portion of the mount 5 by bolts or the like, and then The display screen 2 is fixedly connected to the cooling substrate 3, which may be bonded, or may be realized by fasteners or other connectors. For example, the display screen 2 may be fixedly connected to the periphery of the cooling substrate 3 by an adhesive, so that the display screen 2 and the cooling substrate 3 may form a flow path 3a through which the cooling liquid flows. Of course, the flow path 3a can also be applied to the flow of the cooling gas.

Referring to the specific structure of FIGS. 4 to 6, the display screen 2 includes a return type outer peripheral portion and a convex portion, and the cooling substrate 3 may include a substrate peripheral portion and a substrate recess portion. Under this structure, the return type outer peripheral portion of the display screen 2 and the cooling substrate 3 The peripheral portion of the substrate is fixedly connected, and the convex portion of the display screen 2 is embedded in the concave portion of the substrate of the cooling substrate 3 such that the flow path 3a is formed between the convex portion and the concave portion of the substrate. More specifically, a groove opening toward the display screen 2 is formed in the substrate recess of the cooling substrate 3, and when the convex portion of the display screen 2 is embedded in the substrate recess, the convex portion of the display screen 2 closes the groove, thereby A sealed flow path 3a is formed. It can be seen that when the coolant flows through the flow passage 3a, heat is taken away to achieve cooling.

Referring to Figure 3, another arrangement of the cooling structure is illustrated. In the embodiment shown in FIG. 3, the cooling structure includes a cooling substrate 3 and a sealing layer 4. The cooling substrate 3 is also fixed to the return mounting portion 51 of the mount 5, and the sealing layer 4 is located below the display screen 2 and fixedly mounted to the cooling substrate 3. Under this configuration, the convex portion of the display screen 2 is still embedded in the substrate recess of the cooling substrate 3 to ensure mounting positioning. The sealing layer 4 does not need to be fixedly connected to the display panel 2, but needs to be sealedly mounted with the cooling substrate 3, so that a flow path 3a through which the cooling liquid flows is formed between the sealing layer 4 and the cooling substrate 3 to achieve temperature reduction. The display screen 2 does not need to be fixedly connected to the cooling substrate 3 and the sealing layer 4 as compared with the above-described embodiment that does not include the sealing layer 4, which facilitates the replacement of the display screen 2. In addition, the display screen 2 does not need to be fixed by using an adhesive, which can avoid corrosion of the display screen 2 by the adhesive in long-term use, and prevents the display screen 2 from affecting the fixed molding quality of the resin due to corrosion, and prolongs the service life of the display screen 2.

Preferably, the sealing layer 4 may be a glass film but is not limited to a glass film, as long as it is a sealing layer capable of transmitting light without affecting the quality of printing. In the above embodiment, the sealing layer 4 is located between the display screen 2 and the cooling substrate 3, specifically between the convex portion of the display screen 2 and the substrate recess of the cooling substrate 3, and the sealing layer 4 may be formed as needed. There is a protruding structure or the like that matches the groove on the concave portion of the substrate. Further, in other modified embodiments, the sealing layer 4 may be fixed below the cooling substrate 3. For example, the flow path 3a of the cooling substrate 3 is opened downward, and the sealing layer 4 is hermetically connected below the cooling substrate 3. Further, in still another modified embodiment, the cooling substrate 3 and the sealing layer 4 may be formed in an integral form or the like. It can be seen that any cooling structure capable of providing heat dissipation from the cooling liquid should fall within the protection scope of the present disclosure. Wherein, the refractive index of the cooling liquid is preferably substantially equal to the refractive index of the cooling substrate 3 to avoid reducing the molding precision of the printed product. It should be explained that "substantially equal" herein means that the refractive index of the cooling liquid is equal to the refractive index of the cooling substrate 3, but the refractive index of the cooling liquid may be slightly larger or slightly smaller than the cooling substrate 3 within a certain acceptable range. Refractive index. In practical applications, the coolant may be water or oil.

Referring to FIGS. 4 to 6, a cooling liquid inlet 3b and a coolant outlet 3c communicating with the flow path 3a are provided on the cooling substrate 3, and the cooling liquid inlet 3b is in communication with the inlet conduit 7, and the cooling liquid outlet 3c is connected to the outlet conduit 8. . Specifically, one end of the inlet duct 7 and the outlet duct 8 may be connected to the cooling substrate 3 through the pipe joint and the coolant inlet 3b and the coolant outlet 3c, respectively. The other ends of the inlet duct 7 and the outlet duct 8 may be connected to the aforementioned cooling system through a pipe joint, thereby enabling the cooling system to supply the coolant in the flow path 3a, and collecting the refluxed coolant for recycling. In FIG. 4, the shape of the flow path 3a is a serpent shape extending from one end of the cooling substrate 3 to the other end of the cooling substrate 3. It can be understood that this design can make the flow path 3a fill the cooling substrate 3 as much as possible, thereby increasing the heat dissipation area and improving the cooling efficiency. Of course, other flow passages 3a may be used depending on the actual application, and the disclosure is not listed one by one.

According to the advantages of the above resin pool assembly, the photocuring 3D printer using the above resin pool assembly has the advantages of high 3D printing curing molding efficiency and good curing molding quality due to the arrangement of the cooling structure therein, and the frequency of replacement of the display screen is reduced. Therefore, the use cost of the entire photocured 3D printer is reduced.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure is applicable to various possibilities. The combination method will not be described separately.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

Claims (9)

1. A resin pool assembly for a photocuring 3D printer, comprising: a cell body (1) for accommodating a resin material and having a light transmissive bottom, and a display screen (2) disposed under the bottom of the light transmissive cell Provided below the display screen (2) is a cooling structure for dissipating heat, the cell body (1) comprising a frame body (11) formed as a side wall and a light transmissive layer formed as the bottom of the cell (12) The light transmissive layer (12) is fixed on the bottom surface of the frame body (11), and the light transmissive layer (12) is a polymer oxygen permeable film and is spaced apart from the display screen (2). The cooling structure includes a cooling substrate (3), and a sealing layer (4) fixedly mounted to the cooling substrate (3), the sealing layer (4) being located on the display screen (2) and the cooling substrate (3) A flow path (3a) through which the cooling liquid flows is formed between and between the cooling substrate (3).
2. A resin cell assembly for a photocuring 3D printer according to claim 1, wherein said cooling structure comprises a cooling substrate (3), said display screen (2) being fixedly connected to said cooling substrate (3) A flow path (3a) through which the cooling liquid flows is formed between the display screen (2) and the cooling substrate (3).
3. A resin cell assembly for a photocuring 3D printer according to claim 1, wherein the sealing layer (4) is a glass film.
4. A resin cell assembly for a photocuring 3D printer according to claim 1 or 2, wherein the refractive index of the cooling liquid is substantially equal to the refractive index of the cooling substrate (3).
5. A resin cell assembly for a photocuring 3D printer according to any one of claims 1 to 4, characterized in that there is no cavity between the cell body (1) and the display screen (2), and There are no channels for charging or withdrawing gas.
6. A resin cell assembly for a photocuring 3D printer according to claim 5, wherein said cooling substrate (3) is provided with a coolant inlet (3b) and cooling in communication with said flow path (3a) A liquid outlet (3c), and the coolant inlet (3b) is in communication with an inlet conduit (7), and the coolant outlet (3c) is in communication with an outlet conduit (8).
7. A resin cell assembly for a photocuring 3D printer according to claim 6, wherein the display screen (2) is an LCD display or an OLED display.
8. The resin pool assembly for a photocuring 3D printer according to claim 6, further comprising:

   The mounting seat (5) includes a return mounting portion (51) and a supporting side wall (52) fixed under the return mounting portion (51), the return mounting portion (51) and the pool body (1) The dimensions of the frame are matched; for detachably mounting the cell body (1) and the display screen (2).
9. A photocurable 3D printer, characterized in that the photocurable 3D printer comprises the resin cell assembly according to any one of claims 1 to 8.

Images