System for preparing polymer products through photo-crosslinking in solid state
By designing a system for preparing polymer materials under solid state photocrosslinking, the problem of vibration affecting processing accuracy and difficulty in realizing assembly line mode processing is solved, and high-precision and high-efficiency photocrosslinking processing in solid state is achieved.
Patent Information
- Application Number
- CN202421649082.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-12
AI Technical Summary
When the prior art is used to prepare polymer materials in a solid state, it is affected by vibration caused by the rapid movement of the loading resin platform and the laser part, resulting in low processing accuracy and difficult to realize assembly line mode processing.
A system including a printing platform, an optical curing machine and a UV point light source is designed. The UV point light source can irradiate the UV light beam, and the solid resin raw material is optically cross-linked at room temperature. The system is equipped with a platen area and a separation area, and the separation between the optical cross-linked part and the unlight cross-linked part is achieved through heating and mechanical separation.
The system can maintain high machining accuracy in a vibrating environment, realize assembly line mode processing, improve processing speed, and reduce equipment complexity and cost.
Smart Images
Figure CN223030373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a system for preparing polymer materials by photocrosslinking, in particular to a system for preparing polymer products by photocrosslinking in the solid state. Background Art
[0002] Currently, general laser engraving machines can cut and surface engrave (subtractive manufacturing) solid plastic sheets. Two-dimensional or three-dimensional plastic products can also be prepared by photocuring liquid resin (3D printing) (additive manufacturing). Volume printers using liquid resin as raw materials are not yet truly marketized due to the need to use complex systems and high costs. And volume printing by photocuring in the solid state is still in the conceptual stage.
[0003] In the field of planar processing, laser engraving machines are already standard processing equipment. Laser engraving machines are subtractive manufacturing, and the raw materials are prefabricated plates with a fixed thickness (generally, it is impossible to achieve any thickness or variable thickness on-site during processing). The remaining processed materials cannot be recycled immediately, and it is difficult to process in a production line mode. Summary of the Utility Model
[0004] Purpose of the Utility Model: The purpose of the utility model is to provide a system for preparing polymer products by photocrosslinking in the solid state, which can process polymer components under the conditions of photocrosslinking in the solid state, without being affected by the vibration caused by the rapid movement of the platform loaded with resin or the rapid movement of the laser part on the processing accuracy, and can achieve processing in a production line mode.
[0005] Technical Solution: The system for preparing polymer products by photocrosslinking in the solid state described in the utility model includes a printing platform for placing solid resin raw materials and a photocuring machine. The photocuring machine is provided with a UV point light source, and the UV point light source is connected to a controller for moving the UV point light source along a predetermined trajectory; the UV point light source is used to irradiate a UV beam on the surface of the solid resin raw materials on the printing platform, so that the solid resin raw materials undergo photocrosslinking to form a polymer material with a target shape.
[0006] Wherein, a temperature control device for heating the solid resin raw materials is provided on the printing platform.
[0007] Wherein, a pressing plate area for pre-forming the solid resin raw materials before photocrosslinking is provided at the front end of the printing platform, and a separation area for separating the photocrosslinked part and the non-photocrosslinked part in the polymer material after photocrosslinking is provided at the rear end of the printing platform.
[0008] Wherein, a conveying mechanism for conveying the separated non-crosslinked polymer materials to the pressing plate area for re-photocrosslinking is provided between the outlet of the separation area and the inlet of the pressing plate area.
[0009] Among them, a rolling device for pressing the solid resin raw material to form a plate shape is provided in the pressing plate area; a separating device for separating the photo-crosslinked part from the non-photo-crosslinked part is provided in the separating area.
[0010] Among them, heating devices for heating the solid resin raw material or the photo-crosslinked product are provided in both the pressing plate area and the separating area. The heating device in the pressing plate area is used to heat the raw material to make it easy to deform and then press it through a template; the heating device in the separating area is used to heat the product to make the non-photo-crosslinked part reach a flowing state and then easily peel off from the photo-crosslinked part.
[0011] Among them, when a heating device is provided in the separating area, the separating device is a shaking device, and the shaking device is used to shake the product when the non-photo-crosslinked part is in a flowing state so as to separate the non-photo-crosslinked part from the photo-crosslinked part; when no heating device is provided in the separating area, the separating device is an ejecting mechanism, and the ejecting mechanism is used to eject the non-photo-crosslinked part from the product to separate it from the photo-crosslinked part.
[0012] Among them, a conveyor belt is provided between the outlet of the pressing plate area and the inlet of the separating area, and the printing platform is arranged on the conveyor belt and can move with the conveyor belt to send the pre-pressed solid resin raw material sent from the pressing plate area to the separating area after photo-crosslinking.
[0013] Among them, a plurality of UV point light sources are provided in a direction perpendicular to the moving direction of the UV point light source above the printing platform; the UV point light source is connected to a brake for controlling the movement of the UV point light source; the brake is connected to a controller.
[0014] Beneficial effects: Compared with the prior art, the present utility model has achieved the following remarkable effects: (1) The device of the present utility model can be used for 2D and surface-relief 3D printing with solid resin as the raw material, using a UV point light source on a light curing machine. Since the resin to be photocrosslinked is solid at room temperature, the vibration caused by the rapid movement of the platform loading the resin or the rapid movement of the laser part has almost no influence on the processing accuracy. The whole machine can be made simple, light, and miniaturized. There is no need to consider vibration isolation, and it can even be used in an environment with strong random vibration, such as in a moving car or airplane, and can also be used for product processing in a weightless space environment. (2) Since it is a planar layout, multiple UV light sources can be used for synchronous processing, and processing in an assembly line mode can be achieved, greatly improving the processing speed. (3) Currently, most volume printing uses a moving light source method because liquid raw materials are used; while volume printing in the solid state is still in the conceptual stage. (4) Compared with volume printing, it is a high-cost-effective high-speed light curing system, and processing in an assembly line mode can be achieved; compared with laser engraving, the raw material is solid at room temperature and can be pre-pressed to the required thickness and surface pattern; compared with laser engraving, the un-photocrosslinked part can be separated after heating or immediately continue to be used after mechanical separation without heating. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of the present utility model;
[0016] Figure 2 It is a top view of the structure of the present utility model including a pressing plate area and a separation area;
[0017] Figure 3 It is a side view of the structure of the present utility model including a pressing plate area and a separation area;
[0018] Figure 4 It is a schematic structural diagram of the raw material to be processed of the present utility model. Detailed Embodiments
[0019] The technical solution of the present utility model will be further described below with reference to the drawings in the specification.
[0020] As Figures 1-3 shown, the present utility model provides a system for photocrosslinking under solid state to prepare polymer products, including a printing platform 2 for placing solid resin raw material 5 and a light curing machine; the light curing machine is provided with a UV point light source 1, and the UV point light source 1 is connected to a controller (not shown in the figure) for moving the UV point light source 1 along a predetermined trajectory; the UV point light source 1 is used to irradiate a UV beam 4 on the surface of the solid resin raw material 5 on the printing platform 2, so that the solid resin raw material 5 undergoes photocrosslinking to form a polymer material with a target shape.
[0021] The raw material used for processing in this utility model is a photocrosslinkable solid resin, which is solid at room temperature before crosslinking. In this embodiment, a plurality of UV point light sources are provided in a direction perpendicular to the moving direction of the UV point light source above the printing platform; the UV point light source 1 is connected to the brake 8 for controlling the movement of the UV point light source; the brake 8 is connected to the controller.
[0022] In this embodiment, a temperature control device (not shown in the figure) for heating the solid resin raw material 5 is provided on the printing platform 2; the printing platform 2 is a movable platform, and a pressing plate area 6 for pre-pressing the solid resin raw material 5 into a shape before photocrosslinking is provided at the moving front end of the printing platform 2, and a separating area 7 for separating the photocrosslinked part and the non-photocrosslinked part in the photocrosslinked polymer material is provided at the moving rear end of the printing platform 2. In this embodiment, a conveyor belt 10 is provided between the outlet of the pressing plate area 6 and the inlet of the separating area 7, and the start-stop mechanism of the conveyor belt 10 is connected to the controller; the printing platform 2 is arranged on the conveyor belt 10 and can move with the conveyor belt 10 to send the pre-pressed solid resin raw material 5 sent from the pressing plate area 6 to the separating area 7 after photocrosslinking. A rolling press device (not shown in the figure) for pressing the solid resin raw material to form a plate shape is provided in the pressing plate area 6 of this embodiment; a separating device for separating the photocrosslinked part from the non-photocrosslinked part is provided in the separating area 7. Heating devices (not shown in the figure) for heating the solid resin raw material or the photocrosslinked product are provided in both the pressing plate area 6 and the separating area 7. The heating device in the pressing plate area 6 is used to heat the raw material to make it easy to deform and then press it through a template; the heating device in the separating area 7 is used to heat the product to make the non-photocrosslinked part reach a flowing state and then easily peel off from the photocrosslinked part. When a heating device is provided in the separating area 7, the separating device is a shaking device, and the shaking device is used to shake the product when the non-photocrosslinked part is in a flowing state so as to separate the non-photocrosslinked part from the photocrosslinked part; when no heating device is provided in the separating area 7, the separating device is an ejecting mechanism, and the ejecting mechanism is used to eject the non-photocrosslinked part from the product to separate it from the photocrosslinked part. A conveying mechanism 11 for conveying the separated non-crosslinked polymer material to the pressing plate area 6 for re-photocrosslinking is provided between the outlet of the separating area 7 and the inlet of the pressing plate area 6. The photocrosslinked part and the non-photocrosslinked part are separated by mechanical means at room temperature or after heating to make the non-photocrosslinked part have fluidity. The separated non-photocrosslinked part is pressed at room temperature or high temperature and then returns to a solid state at room temperature for continued use.
[0023] As one specific example, as Figure 4 shown in (a) of, a 20 cm x 20 cm x 2.1 mm plate pre-pressed and extruded is used as the solid resin raw material 5, and the device of this utility model is used for photocrosslinking to prepare a polymer product.
[0024] As one specific example, as Figure 4As shown in (b) therein, after preheating and embossing the surface of a 2.15-mm-thick sheet to form a pattern, it is used as the solid resin raw material 5, and the device of the present utility model is used for photocrosslinking to prepare a polymer product.
[0025] As one specific example, after a sheet with a width of 100 mm and a thickness of 1.5 mm is embossed, it moves at a speed of 1 mm / s to 10 mm / s and is locally crosslinked when passing through four UV point light sources that can move within a 25 mm x 25 mm area respectively. After UV treatment, the photocrosslinked part is peeled off from the non-photocrosslinked part by mechanical means. The non-photocrosslinked part is transported back to the starting position and remolded into a sheet with a width of 100 mm and a thickness of 1.5 mm. This process can achieve mass production on an assembly line.
[0026] As one specific example, the material with the model number 4504 of Guangzhou Tianze New Material Technology Co., Ltd. is mixed with thermoplastic polyurethane at high temperature and then flattened, placed on a temperature control table at 55 °C to maintain a non-crystalline fully transparent state, and then photocrosslinked.
Claims
1. A system for preparing a polymer product by photocrosslinking in the solid state, characterized in that: The invention comprises a printing platform (2) for placing a solid resin raw material (5), and a light curing machine, wherein the light curing machine is provided with a UV point light source (1), and the UV point light source (1) is connected to a controller for moving the UV point light source (1) according to a predetermined track; the UV point light source (1) is used to irradiate a UV light beam onto the surface of the solid resin raw material (5) on the printing platform (2), thereby causing the solid resin raw material (5) to undergo photo-crosslinking, so as to form a polymer material having a target shape.
2. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 1, characterized in that: The printing platform (2) is provided with a temperature control device for heating the solid resin raw material (5).
3. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 1, characterized in that: The printing platform (2) is a movable platform, and the movable front end of the printing platform (2) is provided with a pressing plate area (6) for pre-pressing the solid resin raw material before photo-crosslinking, and the movable rear end of the printing platform (2) is provided with a separation area (7) for separating the photo-crosslinked part and the non-photo-crosslinked part in the polymer material after photo-crosslinking.
4. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 3, characterized in that: A conveying mechanism (11) is provided between the outlet of the separation zone (7) and the inlet of the pressing plate zone (6) for conveying the separated uncrosslinked polymer material to the pressing plate zone for re-photocrosslinking.
5. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 3, characterized in that: The pressing plate area (6) is provided with a roller pressing device for pressing the solid resin raw material into a plate shape; the separation area (7) is provided with a separation device for separating the photo-crosslinked part from the non-photo-crosslinked part.
6. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 3, characterized in that: The pressing plate area (6) and the separation area (7) are both provided with a heating device for heating the solid resin raw material or the photo-crosslinked product. The heating device of the pressing plate area (6) is used to heat the raw material so that it is easy to deform and pass through the template for pressing; the heating device of the separation area (7) is used to heat the product so that the non-photo-crosslinked part reaches a fluid state and is easy to peel off from the photo-crosslinked part.
7. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 5, characterized in that: When the separation zone (7) is provided with a heating device, the separation device is a shaking device, and the shaking device is used to shake the product when the non-photo-crosslinked part is in a flowing state, thereby separating the non-photo-crosslinked part from the photo-crosslinked part; When the separation zone (7) is not provided with a heating device, the separation device is an ejection mechanism, and the ejection mechanism is used to eject the non-photo-crosslinked portion from the product and separate it from the photo-crosslinked portion.
8. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 3, characterized in that: A conveyor belt (10) is provided between the outlet of the pressing plate area (6) and the inlet of the separation area (7). The printing platform (2) is provided on the conveyor belt (10) and can move with the conveyor belt (10) to deliver the pre-pressed solid resin raw material (5) fed from the pressing plate area (6) to the separation area (7) after photo-crosslinking.
9. The system for preparing a polymer product by photocrosslinking in the solid state according to claim 1, characterized in that: A plurality of UV point light sources (1) are arranged above the printing platform (2) in a direction perpendicular to the moving direction of the UV point light source (1); the UV point light source (1) is connected to a brake (8) for controlling the planar movement of the UV point light source (1); and the brake (8) is connected to a controller.