阅读说明：本技术 一种基于下置式光固化成形技术的多工位切换系统及光固化成型加工方法 (Multi-station switching system based on underneath type photocuring forming technology and photocuring forming processing method ) 是由 沈理达 刘富玺 吕非 谢德巧 焦晨 晁龙 邱明波 赵剑峰 于 2020-10-22 设计创作，主要内容包括：本发明公开了一种基于下置式面曝光光固化成形技术的多工位切换系统及光固化成型加工方法,包括上层的成形层、中层的多液槽层和下层的多工位层,其中,成形层用于上下升降并通过旋转切换至不同工位,多液槽层用于放置不同种类的液态高分子材料,多工位层用于根据需求对成形件进行不同功能的加工。本发明可实现多材料三维打印,并根据实际需求对成形件进行优化改性,旋转工位结构的采用,结构简单,有效节约了空间,降低成本,整个系统更加紧凑,在医疗与精密电子电器领域有着良好的应用前景。(The invention discloses a multi-station switching system based on a underneath type surface exposure photocuring forming technology and a photocuring forming processing method. The invention can realize multi-material three-dimensional printing, optimally modify a formed part according to actual requirements, and adopt a rotary station structure, so that the structure is simple, the space is effectively saved, the cost is reduced, the whole system is more compact, and the invention has good application prospect in the fields of medical treatment and precise electronic and electrical appliances.)

1. The utility model provides a multistation switching system based on underlying face exposure photocuring shaping technique which characterized in that, includes the shaping layer on upper strata, the multistation layer of medial multiliquid groove layer and lower floor, and shaping layer, multiliquid groove layer and multistation layer are connected through mechanical parts and are the configuration of ladder from top to bottom, and wherein, shaping layer is used for the oscilaltion and switches to different stations through the rotation, and the multiliquid groove layer is used for placing different kinds of liquid macromolecular material, and the multistation layer is used for carrying out the processing of different functions to the shaping piece according to the demand.

2. The multi-station switching system based on the underneath type surface exposure photocuring forming technology of claim 1, wherein the light source of the multi-station switching system is positioned below the liquid tank, and the forming layer is an underneath type workbench and realizes the up-and-down movement and rotation of the formed part.

3. The multi-station switching system based on the underneath type surface exposure photocuring forming technology of claim 1, wherein the multi-tank layer comprises a plurality of tanks, each tank contains different types of liquid photocuring materials, and the tanks are switched by the rotation of the station so as to complete the photocuring forming of different materials.

4. The multi-station switching system based on the underneath type surface exposure photocuring forming technology according to claim 3, wherein the multi-groove layer photocuring material is a liquid polymer material added with ceramic, metal particles or fibers as a reinforcing phase, and the adding proportion of the reinforcing phase is not more than 15%.

5. The multi-station switching system based on the underneath type surface exposure photocuring forming technology according to claim 1, wherein the multi-station layer comprises a photocuring forming station, a cleaning station, a drying station and a material compounding station, the stations are located on the same horizontal plane and are arranged in an annular mode, station switching is completed through station rotation, the photocuring forming station is used for realizing part forming, the cleaning station is used for cleaning a formed part, the drying station is used for drying the formed part, and the material compounding station is used for realizing functional device embedding and metal material splicing.

6. The multi-station switching system based on the underneath type surface exposure photocuring forming technology of claim 5, wherein the photocuring forming station adopts a micro-focusing lens shift exposure technology, the forming precision is 0.036mm, the forming efficiency is 1 x 106mm3/h, and the light source is ultraviolet light.

7. The multi-station switching system based on the underneath type surface exposure photocuring forming technology according to claim 5, wherein the cleaning station adopts ultrasonic cleaning, and the cleaning time is 10-15 s; the drying station adopts hot air for drying, and the temperature is 20-30 ℃.

8. A photocuring forming method using the multi-station switching system according to any one of claims 1 to 7, comprising the steps of:

(1) establishing a three-dimensional model of a multifunctional high polymer material part to be processed in modeling software, and partitioning a part area according to a required function;

(2) importing the partitioned model into slicing software for adding support, slicing in layers, path planning and parameter selection, importing the generated STL format file into a multi-station switching system, and selecting stations by the multi-station switching system according to partition information to process the part;

(3) when the material B needs to be formed, the forming part rises along with the underlying workbench, the station is switched to rotate to a cleaning and drying station, then the formed part is cleaned and dried in sequence, then the formed part descends to the working height and is placed in the liquid tank B to be subjected to photocuring forming of the material B, and the surface exposure system irradiates from the lower part of the liquid tank according to the preset model to complete the forming of the material B; the whole part is formed in such a cycle;

(4) and after the forming process is finished, taking out the formed part, cleaning, drying and removing the support to obtain the final part.

Technical Field

The invention relates to a three-dimensional printing technology, in particular to a multi-station switching system based on a underneath type photocuring forming technology and a photocuring forming processing method.

Background

Various wearable medical devices have a large number of potential applications and wide market demands in the fields of health monitoring, disease diagnosis, patient monitoring, disease rehabilitation and the like. With the improvement of scientific understanding of human beings on materials, the future new-generation key materials and the preparation and processing technology thereof need to have the performances of compounding (composite materials), functionalization (multifunctional materials), intellectualization (combined with perception and reaction) and ecological environment friendliness (renewable resource utilization and green) and the like, so that the requirements on wearable medical appliances are met.

In recent years, some research works are based on a bionic idea, are inspired by the characteristics of human skin, and propose the research direction of developing elastic electronic materials and devices by taking a high polymer material as a core, so that the bonding capability and the measurement accuracy of the devices and a human body are improved, and the method is used for developing new-generation wearable sensing devices and equipment. The three-dimensional printing technology can realize the macroscopic integrated manufacturing of medical devices and materials, and the mechanical properties of the materials are regulated and controlled by utilizing microstructures, so that the requirement of close-fitting wearing is met. Meanwhile, the three-dimensional printing technology also provides a closed loop research mode from modeling, processing and testing to optimization, the structural design is improved through repeated iteration, the wearing comfort and the reliability of the processed medical equipment are improved, and the research and development efficiency is greatly improved. However, the conventional three-dimensional printing technology is mostly applicable to single materials, and the three-dimensional printing technology for flexible materials is applied less, so that a novel multi-material flexible high polymer material three-dimensional printing technology is needed.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a multi-station switching system based on a down-mounted light curing forming technology, which solves the problems that only one material can be formed and the formed part has a single function in the conventional light curing forming, efficiently utilizes the forming space, saves the area, reduces the cost and has a compact structure.

The invention also aims to provide a photocuring forming processing method adopting the multi-station switching system.

The technical scheme is as follows: the invention discloses a multi-station switching system based on an underlying surface exposure photocuring forming technology, which comprises an upper forming layer, a middle multi-liquid-tank layer and a lower multi-station layer, wherein the forming layer, the multi-liquid-tank layer and the multi-station layer are connected through mechanical parts to form an upper step, a middle step and a lower step, the forming layer is used for ascending and descending and is switched to different stations through rotation, the multi-liquid-tank layer is used for placing different types of liquid high polymer materials, and the multi-station layer is used for processing the forming piece with different functions according to requirements.

Preferably, the light source of the multi-station switching system is positioned below the liquid tank, and the forming layer is a lower-arranged workbench, so that the formed part can move up and down and rotate.

Preferably, the multi-liquid-tank layer comprises a plurality of liquid tanks, different types of liquid light curing materials are contained in each liquid tank, and the liquid tanks are switched through rotation of the stations, so that light curing forming of different materials is completed.

Preferably, the multi-tank layer photocuring material is a liquid polymer material added with ceramic, metal particles or fibers as a reinforcing phase, and the adding proportion of the reinforcing phase is not more than 15%.

Preferably, the multi-station layer comprises a light curing forming station, a cleaning station, a drying station and a material compounding station, all the stations are located on the same horizontal plane and are placed in an annular mode, station switching is completed through station rotation, the light curing forming station is used for achieving part forming, the cleaning station is used for cleaning a formed part, the drying station is used for drying the formed part, and the material compounding station is used for achieving functional device embedding and metal material splicing.

Preferably, the photocuring forming station adopts a micro-focusing lens offset exposure technology, the forming precision is 0.036mm, the forming efficiency is 1 multiplied by 106mm3/h, and the light source is ultraviolet light.

Preferably, ultrasonic cleaning is adopted for the cleaning station, and the cleaning time is 10-15 s; the drying station adopts hot air for drying, and the temperature is 20-30 ℃. C

The invention relates to a photocuring forming processing method adopting a multi-station switching system, which comprises the following steps of:

(1) establishing a three-dimensional model of a multifunctional high polymer material part to be processed in modeling software, and partitioning a part area according to a required function;

(2) importing the partitioned model into slicing software for adding support, slicing in layers, path planning and parameter selection, importing the generated STL format file into a multi-station switching system, and selecting stations by the multi-station switching system according to partition information to process the part;

(3) when the material B needs to be formed, the forming part rises along with the underlying workbench, the station is switched to rotate to a cleaning and drying station, then the formed part is cleaned and dried in sequence, then the formed part descends to the working height and is placed in the liquid tank B to be subjected to photocuring forming of the material B, and the surface exposure system irradiates from the lower part of the liquid tank according to the preset model to complete the forming of the material B; the whole part is formed in such a cycle;

(4) and after the forming process is finished, taking out the formed part, cleaning, drying to remove the support and the like to obtain the final part.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) the material increase manufacturing integrated forming of multiple materials is carried out through station switching, and the problem that a three-dimensional graph is difficult to process in the structure in a traditional processing mode is solved;

(2) the invention realizes the integrated layered printing of the component substrate and the internal structure by utilizing the photocuring forming technology, and can print an arbitrarily complex three-dimensional multi-material model;

(3) the sample piece processed by the method can completely abandon complex procedures such as material splicing, device fusion and the like, optimizes processing steps, has simple process, no assembly and short production period, and is particularly suitable for product design research and development and small-batch production.

Drawings

FIG. 1 is a schematic diagram of a three-layer structure of a multi-station switching system according to the present invention;

FIG. 2 is a schematic plan view of the multi-station switching system of the present invention;

FIG. 3 is a schematic diagram illustrating the station switching process of the multi-station switching system of the present invention;

in the figure, 1, a forming part lower-mounted workbench, 2, an A material liquid tank, 3, a surface exposure system, 4, a hot air fan, 5, a B material liquid tank, 6 a cleaning tank, 7 and a composite processing platform.

Detailed Description

The present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The following description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

The invention discloses a multi-station switching system based on a underneath type photocuring forming technology, which comprises an upper forming layer, a middle multi-liquid-tank layer and a lower multi-station layer, wherein the forming layer, the multi-liquid-tank layer and the multi-station layer are of an upper structure, a middle structure and a lower structure, are connected through mechanical structures such as trusses and the like and can rotate, the forming layer can be lifted up and down and switched to different stations through rotation, the multi-liquid-tank layer is used for placing different types of liquid polymer materials, and the multi-station layer is used for processing the forming parts with different functions according to requirements. The multi-station system light source is positioned below the liquid tank, and the forming layer is a lower workbench and can realize the up-and-down movement and rotation of the formed part; the multi-liquid tank layer comprises a plurality of liquid tanks, different types of liquid light curing materials are contained in each liquid tank, and light curing forming of the different materials is completed by switching the liquid tanks through rotation of the stations; the multi-station layer comprises a light curing forming station, a cleaning station, a drying station and a material compounding station, all the stations are positioned on the same horizontal plane and are annularly arranged, and station switching is completed through station rotation; the light curing forming station is used for realizing part forming, the cleaning station is used for cleaning a formed part, the drying station is used for drying the formed part, and the material compounding station is used for realizing functional device embedding and metal material splicing.

As shown in fig. 1, the lower stage of the embodiment of the present invention is used to drive the forming part to ascend, descend or rotate, the multi-bath layer includes an a-material bath and a B-material bath, the photo-curing forming station of the multi-station layer is a surface exposure system, the cleaning station is a cleaning bath, the drying station is a hot fan, and the material compounding station is a composite processing platform. The photocuring materials in the material liquid tank A and the material liquid tank B are liquid high polymer materials added with ceramic, metal particles or fibers as reinforcing phases, the adding proportion of the reinforcing phases is not more than 15%, and the photocuring materials can be used for forming more than three types of materials. The photocuring forming station adopts a micro-focusing lens offset exposure technology, the forming precision is 0.036mm, the forming efficiency is 1 multiplied by 106mm3/h, and the light source is ultraviolet light. Ultrasonic cleaning is adopted at a cleaning station, and the cleaning time is 10-15 s; the drying station adopts hot air for drying, and the temperature is 20-30 ℃. The material compounding station comprises functions of splicing metal materials, embedding functional devices and the like.

The working principle of the multi-station switching system is as follows: the system is switched to corresponding stations by partitioning different materials in the model to complete the processing and forming of the corresponding materials, the cleaning and drying steps are configured when the different stations are switched, the cleaning and drying processes are completed on corresponding workbenches, and the steps are repeated in a circulating way, so that the compounding of multiple materials is completed.

The processing method for carrying out photocuring forming by adopting the multi-station switching system specifically comprises the following steps:

s1, establishing a three-dimensional model of the multifunctional polymer material part to be processed in modeling software, and partitioning the part area according to the required functions;

s2, importing the partitioned model into slicing software for adding support, slicing in layers, planning a path, selecting parameters, importing the generated STL format file into a multi-station switching system, selecting a station by the multi-station switching system according to partition information for processing the part, and finishing station switching, cleaning, drying and other steps by editing and switching programs after the material A is processed to process the next material;

s3, when processing is started, the lower workbench is placed in a liquid tank added with the material A, and the surface exposure system irradiates from the lower part of the liquid tank according to a preset model to finish the forming of the material A; when the material B needs to be formed, according to the partition of the model material, the forming part rises to a specified position along with the underlying workbench according to the preset switching station switching program, the forming part is switched to a cleaning station and a drying station at one time, then the underlying workbench is moved into a liquid tank filled with the material B, and the surface exposure system irradiates from the lower part of the liquid tank according to the preset model to complete the forming of the material B; the whole part is machined and formed in a reciprocating mode.

And S4, after the forming process is finished, taking out the formed part, cleaning, drying to remove the support and the like to obtain the final part.

The processing method is further explained by taking the processing of the wearable medical equipment as an example:

(1) and (3) establishing a wearable medical equipment three-dimensional model to be processed by using three-dimensional modeling software in a computer, and storing the model as an STL file after the modeling is finished. And partitioning the model STL file according to the requirements required to be met by different material areas, and selecting different processing modes for different areas.

(2) Importing the partition-finished model STL file into a multi-station switching system, and selecting a corresponding processing mode by the multi-station switching system according to preset partition information, namely selecting a station by the multi-station switching system according to the partition information to process the part; the whole process is that the multi-station switching system can automatically switch stations to adjust the machining position.

(3) In the processing process, materials such as ceramics, metal particles or fibers adopted in the process of photocuring and forming the matrix in the liquid tank are used as liquid high polymer materials of the reinforcing phase, the adding proportion of the reinforcing phase is not more than 15%, and more than three types of the liquid high polymer materials can be selected. The surface exposure system adopts a high-efficiency high-precision array type sub-pixel scanning large-size surface forming technology, and realizes high-efficiency high-precision forming on the basis of a micro-transmission array focusing technology.

(4) For example, fig. 3 is a schematic diagram of a station switching process of a multi-station switching system, after one type of liquid polymer-based material is formed, the liquid polymer-based material can be continuously formed according to actual requirements or switched to another station to form another type of liquid polymer-based material, before a liquid tank is switched, the formed part needs to be cleaned and dried to prevent mutual pollution between materials, and the above steps are repeated in this way to realize multi-material three-dimensional printing. In addition, other stations such as functional device embedding and metal material splicing stations can be added according to actual needs, and as shown in fig. 2, the manufactured wearable sensor product can meet different requirements.

(5) After the part entity of the processing completion place is taken out, whether each part in the part entity can realize corresponding function is tested after the surface is processed, and finally, the processing preparation of the wearable medical equipment is completed.

In summary, the multi-station switching system based on the underneath type photocuring forming technology adopts a three-layer rotating structure design and is matched with a multifunctional working platform. The scheme efficiently utilizes the forming space, the design of the rotating structure saves the forming space, the cost is reduced, and the whole system has a compact structure.