Infrared excitation discoloration ultraviolet light curing 3D printing method

Abstract

The invention discloses an infrared excitation discoloration ultraviolet light curing 3D printing method, and relates to the technical field of 3D printing, the infrared excitation discoloration ultraviolet light curing 3D printing method comprises the following steps: setting an infrared light lamp array and an ultraviolet light lamp array, and constructing an illumination space model corresponding to the infrared light lamp array and the ultraviolet light lamp array; a 3D target object model is determined, and the 3D target object model and the illumination space model are combined to obtain a 3D printing model; demand illumination information of the 3D target object model is obtained, the 3D printing model is arranged based on the demand illumination information, and a demand 3D printing model is obtained; and according to the required 3D printing model, illumination control is conducted on the infrared lamp array and the ultraviolet lamp array, and 3D target object printing is completed. The 3D printing model obtained after rolling layout serves as the required 3D printing model, the accuracy and orderliness of excitation color changing of the 3D target object in the printing process can be guaranteed, color changing irradiation control is more accurate, and the printing quality of the 3D target object is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to an infrared-excited color-changing ultraviolet light-curing 3D printing method. Background Art

[0002] 3D printing with resin as the material is a process of curing while printing. Specifically, resin 3D printing is a process that uses photocuring technology to cure resin materials layer by layer into a three-dimensional entity. The principle is that photosensitive resin materials initiate polymerization reactions under the irradiation of ultraviolet light of a specific wavelength, and the form changes from liquid to solid. In addition, with the color requirements of the printed object, the printed material can change color according to infrared excitation. Infrared excitation usually involves the absorption and conversion of infrared light by the material, and corresponding infrared light wavelength parameters need to be set for different colors. At present, it is difficult to accurately match and irradiate the lighting parameters of the 3D printing process during the printing of 3D products, and it is difficult to ensure the accuracy and orderliness of the color change of the 3D target object during the printing process, and the printing quality of the 3D printed target object cannot be guaranteed. Summary of the invention

[0003] The purpose of the present invention is to provide an infrared-excited color-changing ultraviolet-curing 3D printing method to solve the shortcomings of the background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solution: an infrared excitation color-changing ultraviolet light curing 3D printing method, comprising the following steps: An infrared light array and an ultraviolet light array are set, and a lighting space model is constructed corresponding to the infrared light array and the ultraviolet light array; Determine a 3D target object model, and combine the 3D target object model with the illumination space model to obtain a 3D printing model; Obtain required lighting information of the 3D target model, layout the 3D printing model based on the required lighting information, and obtain the required 3D printing model; According to the required 3D printing model, the infrared light array and the ultraviolet light array are controlled to complete the printing of the 3D target object.

[0005] In a preferred embodiment, the step of setting the infrared light array and the ultraviolet light array and constructing a lighting space model corresponding to the infrared light array and the ultraviolet light array includes: Determine a first illumination space, and arrange an infrared light array according to the first illumination space; Determine a second illumination space, and arrange an ultraviolet lamp array according to the second illumination space; The lighting space model is constructed according to the infrared light array, ultraviolet light array and the printing space of the 3D printing equipment.

[0006] In a preferred embodiment, the step of determining the first illumination space and arranging the infrared light array according to the first illumination space includes: Determine a first layout range and a first illumination range, and obtain a space range between the first layout range and the first illumination range as a first illumination space; Divide the first illumination range into multiple sub-ranges, and project the multiple sub-ranges onto the first layout range in the first illumination space to obtain multiple sub-projection ranges; Infrared lamps are arranged corresponding to the multiple sub-projection ranges, and the infrared lamps corresponding to the multiple sub-projection ranges are associated to form an infrared lamp array.

[0007] In a preferred embodiment, the step of dividing the first illumination range into multiple sub-ranges, and mapping the multiple sub-ranges in the first illumination space onto the first layout range to obtain multiple sub-projection ranges includes: Corresponding to the first illumination range, the first illumination range is divided according to the preset division unit to obtain a plurality of sub-ranges; Spatially superimposing the multiple sub-ranges to obtain mapping channels, until the mapping channel passes through the first layout range, the surface passing through the first layout range is used as the projection range, and the corresponding sub-ranges, mapping channels and projection range are spatially bound; Multiple sub-projection ranges are obtained through multiple sub-range spaces.

[0008] In a preferred embodiment, the step of determining a 3D target model and combining the 3D target model with the illumination space model to obtain a 3D printed model comprises: Acquire the appearance information of the 3D target object, wherein the appearance information includes appearance shape and appearance color information, and construct a 3D target object model according to the appearance information; The 3D target model is constructed into the lighting space model to obtain a combined 3D printed model.

[0009] In a preferred embodiment, the step of obtaining required lighting information of the 3D target model, laying out the 3D printing model based on the required lighting information, and obtaining the required 3D printing model includes: Obtaining corresponding required illumination information according to the shape color information on the 3D target model, wherein the required illumination information includes a required infrared light irradiation range and a corresponding required infrared light wavelength; The required lighting information is marked on the 3D target model in the 3D printing model and the required 3D printing model is obtained by rolling the layout.

[0010] In a preferred embodiment, the step of marking the required lighting information on the 3D target model in the 3D printing model and rolling the layout to obtain the required 3D printing model includes: Mark the required lighting information in the 3D target model in the 3D printing model; Extract the outer contour of the 3D target model marked with the required lighting information to obtain a contour map of the required lighting information; Folding the contour map according to the first illumination range to obtain a multi-layer folded contour map, and aligning the folded contour map of each layer with the first illumination range in terms of orientation; Acquire the corresponding relationship between each layer of the folding contour image corresponding to the orientation and the sub-range on the first illumination range; Based on the corresponding relationship between the folding contour map and the sub-range of each layer and the sub-range bounded by space, the mapping channel and the projection range, the infrared light corresponding to each layer of the folding contour map is obtained; Corresponding to each layer of the folding contour map, the infrared light wavelength parameters of the infrared light in the corresponding infrared light array are set to obtain the target infrared light array, and the target infrared light array corresponding to each layer of the folding contour map is rolled and laid out according to the order before and after printing of the 3D target object; The 3D printing model after the scrolling layout is used as the required 3D printing model.

[0011] In a preferred embodiment, the step of controlling the infrared light array and the ultraviolet light array to print the 3D target object according to the required 3D printing model includes: The 3D target is printed according to the required 3D printing model. During the printing process of the 3D target, the infrared wavelength parameter of the infrared light array is controlled by the folded contour map of the scroll layout to excite the color change of the 3D target. The principle of the infrared wavelength parameter of the infrared light array to excite the color change of the 3D target is as follows: the infrared excitation color change ultraviolet light curing 3D printing material is composed of resin and photoinitiator monomers, including additives of infrared 760nm excitation red pigment, infrared 780nm excitation yellow pigment, infrared 800nm ​​excitation blue pigment and infrared 920nm excitation black pigment; The UV lamp array is always on to solidify the 3D object during the printing process until the printing of the 3D object is completed.

[0012] In the above technical solution, the technical effects and advantages provided by the present invention are: The present invention sets the infrared light wavelength parameters of the infrared lamps in the corresponding infrared light array corresponding to each layer of the folding contour map to obtain the target infrared light array, and performs rolling layout of the target infrared light array corresponding to each layer of the folding contour map according to the order before and after printing of the 3D target object. The rolling layout here is to sort the target infrared light array corresponding to each layer of the folding contour map according to the order before and after printing of the 3D target object, and after the target infrared light array irradiates the 3D target in the printing process, the next irradiation is sorted to the next target infrared light array until the entire 3D target object is printed, and the 3D printed model after the rolling layout is used as the required 3D printed model, which can ensure the accuracy and orderliness of the color change of the 3D target object during the printing process, and better ensure the printing quality of the 3D printed target object. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Example 1, please refer to Figure 1 As shown, the infrared excitation color-changing ultraviolet light curing 3D printing method described in this embodiment includes the following steps: S1. Setting an infrared light array and an ultraviolet light array, and constructing a lighting space model corresponding to the infrared light array and the ultraviolet light array; S2, determining a 3D target model, and combining the 3D target model with the illumination space model to obtain a 3D printing model; S3, obtaining required lighting information of the 3D target model, and laying out the 3D printing model based on the required lighting information to obtain the required 3D printing model; S4. Control the infrared light array and the ultraviolet light array according to the required 3D printing model to complete the printing of the 3D target object; As described in the above steps S1-S4, 3D printing with resin as the material is a process of printing and curing at the same time. Specifically, resin 3D printing is a process of using photocuring technology to cure resin materials layer by layer into a three-dimensional entity. The principle is mainly that the photosensitive resin material triggers a polymerization reaction under the irradiation of ultraviolet light of a specific wavelength, and the form changes from liquid to solid. In addition, with the color requirements of the printed object, the printed material can change color according to infrared excitation. Infrared excitation usually involves the absorption and conversion of infrared light by the material, and corresponding infrared light wavelength parameters need to be set for different colors. At present, it is difficult to accurately match and irradiate the lighting parameters of the 3D printing process during the printing of 3D products, and it is difficult to ensure the accuracy and orderliness of the color change of the 3D target object during the printing process, and the printing quality of the 3D printed target object cannot be guaranteed; and in this application, the corresponding folding of each layer The contour map is set to correspond to the infrared light wavelength parameters of the infrared lamps in the infrared light array to obtain the target infrared light array, and the target infrared light array corresponding to each layer of the folded contour map is scrolled and laid out according to the order before and after printing of the 3D target object. The scrolling layout here is to sort the target infrared light array corresponding to each layer of the folded contour map according to the order before and after printing of the 3D target object, and after the target infrared light array irradiates the 3D target in the printing process, the next irradiation is sorted to the next target infrared light array until the entire 3D target object is printed, and the 3D printed model after the scrolling layout is used as the required 3D printing model, which can ensure the accuracy and orderliness of the color change of the 3D target object during the printing process, and better ensure the printing quality of the 3D printed target object.

[0017] In one embodiment, the step S1 of setting the infrared light array and the ultraviolet light array and constructing a lighting space model corresponding to the infrared light array and the ultraviolet light array includes: S11, determining a first illumination space, and arranging an infrared light array according to the first illumination space; S12, determine the second illumination space, and arrange the ultraviolet lamp array according to the second illumination space. The ultraviolet lamp array here has no limited range and is mainly used to solidify the target object in the 3D printing process. Therefore, as long as the target object can be irradiated for solidification, no specific corresponding setting is required, and a reasonable position is sufficient. The infrared lamp array needs to be specially set to the printing position of the target object. Due to the color of the target object, it is necessary to ensure the corresponding range of the infrared lamp array, so that it is convenient to excite the color change of the target object later; S13, constructing a lighting space model according to the infrared light array, the ultraviolet light array, and the printing space of the 3D printing device; As described in the above steps S11-S13, the first illumination space here is the space where the infrared light array is arranged. The second illumination space is the space where the ultraviolet light array is arranged. The ultraviolet light array here is used for curing 3D printing materials. Therefore, the ultraviolet light array here is normally set in the second illumination space as long as it can irradiate the 3D printing materials that need to be cured. No special arrangement method is required. Here, the irradiation principle of ultraviolet light and infrared light in 3D printing is as follows: infrared excitation color-changing ultraviolet light-curing 3D printing materials are composed of resin and photoinitiator monomers, infrared 760nm excitation red pigments, infrared 780nm excitation yellow pigments, infrared 800nm ​​excitation blue pigments, and infrared 920nm excitation black pigments. The additives; ultraviolet light curing printing method is used to 3D print three-dimensional objects, and different bands of infrared lasers are used to excite the 3D printed three-dimensional objects, and corresponding colors are generated or superimposed at the corresponding laser excitation points, so that the three-dimensional objects become colorful. , which can achieve better color requirements for 3D printed objects. In actual use, the first illumination space and the second illumination space can be the same spatial range or a spatial range with overlapping parts or a spatial range without position overlapping relationship. After the infrared lamp array and the ultraviolet lamp array are arranged, the illumination space model is constructed according to the infrared lamp array, the ultraviolet lamp array and the printing space of the 3D printing device. The illumination space model here is an internal three-dimensional model of the printing space of the 3D printing device with the infrared lamp array and the ultraviolet lamp array arranged, which can reflect the internal situation of the infrared lamp array and the ultraviolet lamp array, facilitate the subsequent color change processing of the 3D printed target object, and can better set the illumination information required for subsequent 3D product printing, facilitate the color change and curing processing of the illumination product, and ensure the manufacturing quality of the 3D product.

[0018] In one embodiment, the step S11 of determining the first illumination space and arranging the infrared light array according to the first illumination space includes: S111, determining a first layout range and a first illumination range, and acquiring a space range between the first layout range and the first illumination range as a first illumination space; S112, dividing the first illumination range into a plurality of sub-ranges, and mapping the plurality of sub-ranges onto the first layout range in the first illumination space to obtain a plurality of sub-projection ranges; S113, infrared lamps are arranged corresponding to the multiple sub-projection ranges respectively, and the infrared lamps corresponding to the multiple sub-projection ranges are associated as an infrared lamp array.

[0019] As described in the above steps S111-S113, the first layout range and the first illumination range here are equivalent to first determining a suitable range for laying out infrared lamps, and then determining a range that needs to be irradiated during the 3D printing process as the first illumination range. For example, in the process of 3D printing three-dimensional objects, for a bottom-up SLA (stereolithography) 3D printer, the light source is usually located below the bottom of the resin tank, then the lower part of the internal printing space of the 3D printer is the setting range of the first illumination range, and then a spatial range between the first layout range and the first illumination range is established. Here, the first layout range and the first illumination range are in a fully covered corresponding relationship. For example, the outer side surface of an annular ring and the inner side surface of an annular ring with a larger diameter, so that a spatial range is established between the outer side surface of an annular ring and the inner side surface of an annular ring with a larger diameter, and the outer side surface of an annular ring and the inner side surface of an annular ring with a larger diameter are fully covered. The outer side surface of an annular ring and the inner side surface of an annular ring with a larger diameter are fully covered. The spatial range is used as the first illumination space, and the first illumination space The space represents the first layout range and the first illumination range and also represents the space between the first layout range and the first illumination range. The first layout range and the first illumination range are planes. The first layout range and the first illumination range are both represented by a circle-shaped range. Then, in order to layout the infrared light, it is necessary to divide the first illumination range into a plurality of sub-ranges. According to the plurality of sub-ranges, they are respectively mapped in the first illumination space and projected onto the first layout range to obtain a plurality of sub-projection ranges. After obtaining the plurality of sub-projection ranges, infrared light is respectively arranged corresponding to the plurality of sub-projection ranges. One infrared light is set corresponding to one sub-projection range. The infrared light is a direct light, which reduces light divergence, thereby ensuring the accuracy of the illumination range, and will not affect the illumination in other ranges. It has a better 3D stereoscopic color change operation. Then, the infrared light corresponding to the plurality of sub-projection ranges are associated as an infrared light array, which can better set the infrared light array so that the subsequent illumination and color change can be performed according to the 3D target object, and it has a better operability.

[0020] In one embodiment, the step S112 of dividing the first illumination range into multiple sub-ranges, and mapping the multiple sub-ranges in the first illumination space onto the first layout range to obtain multiple sub-projection ranges includes: S1121. Corresponding to the first illumination range, the first illumination range is divided into a plurality of sub-ranges according to a preset division unit; S1122, spatially superimposing the multiple sub-ranges to obtain a mapping channel, until the mapping channel passes through the first layout range, the surface passing through the first layout range is used as the projection range, and the corresponding sub-ranges, mapping channels and projection range are spatially bound; S1123. Obtain multiple sub-projection ranges through multiple sub-range spaces.

[0021] As described in the above steps S1121-S1123, the first illumination range and the first layout range here both exist in the form of a circle band, so here it is equivalent to dividing the circle band according to the division preset unit to obtain multiple sub-ranges, and the multiple sub-ranges and the division preset unit are mostly of the same range and shape. Only when the division process at the edge position fails to reach the range and shape of the division preset unit, the insufficient situation is also divided as a division preset unit to obtain multiple sub-ranges, and then spatially superimposed with the sub-range as the starting surface is equivalent to spatially extending and projecting it onto the first layout range according to the shape and range of the sub-range, and the spatially superimposed channel is used as the mapping channel, which here represents the range on the first layout range through which the channel to be mapped passes. As the projection range, the multiple sub-range spaces here are superimposed on the first layout range at different angles, but are all projected within the first layout range, and there is no overlapping mapping range in the mapping range projected within the first layout range, indicating that one mapping range corresponds to one sub-range, and there cannot be any partial overlap or complete rewriting. Then, the corresponding sub-range, mapping channel and projection range are spatially bound, representing that the three are one-to-one corresponding. Multiple sub-projection ranges are obtained through multiple sub-range spaces, which can facilitate the subsequent parameter setting of the infrared light color change processing 3D target object, has good operability, can better meet the color requirements of the 3D target object, make the color change irradiation control more accurate, and improve the printing quality of the 3D target object; In one embodiment, the step S2 of determining a 3D target model and combining the 3D target model with the illumination space model to obtain a 3D printed model includes: S21, obtaining appearance information of the 3D target object, wherein the appearance information includes appearance shape and appearance color information, and constructing a 3D target object model according to the appearance information; S22, constructing the 3D target model into the illumination space model to obtain a combined 3D printing model; As described in the above steps S21 and S22, before printing the 3D target, it is necessary to build a model of the 3D target in advance, by collecting the outer shape and outer color information of the 3D target as the outer shape information, wherein the outer shape includes the structure of the outer shape and the corresponding size, and then three-dimensionally constructing the 3D target model according to the outer shape information, and then constructing the 3D target model in the illumination space model to obtain a combined 3D printing model. At this time, the positional relationship between the 3D target model and the illumination space model in the 3D printing model is the printing position of the 3D target during subsequent printing. In the final real situation, the positional relationship between the 3D target and the illumination space model after the 3D target printing is completed is the setting position and angle of the 3D target in the 3D printing model at this time. Here, the printing parameters of the 3D printing device for the 3D target are set, and the subsequent printing can be performed according to the construction position and angle of the 3D target. Subsequently, only the corresponding excitation color change corresponding to the outer color information of the 3D target needs to be performed; In one embodiment, the step S3 of obtaining the required illumination information of the 3D target model, and laying out the 3D printing model based on the required illumination information to obtain the required 3D printing model includes: S31, obtaining corresponding required lighting information according to the shape color information on the 3D target model, wherein the required lighting information includes a required infrared light irradiation range and a corresponding required infrared light wavelength; S32, marking the required lighting information on the 3D target model in the 3D printing model and rolling the layout to obtain the required 3D printing model; As described in the above steps S31 and S32, the shape color information here is designed for the 3D target in advance. The corresponding infrared light irradiation range and the corresponding required infrared light wavelength are obtained through the shape color information as the required lighting information. The shape color information here includes the range and corresponding color of the shape color corresponding to the 3D target model. After that, the required lighting information is determined and marked on the 3D target model. Then, according to the 3D target model marked with the required lighting information, the infrared light array is rolled and laid out to obtain the required 3D printing model. The 3D printing model here is set by setting the infrared light array and the infrared light wavelength parameters in the 3D target printing process. After setting the required 3D printing model, the actual 3D target printing can be performed; In one embodiment, the step S32 of marking the required illumination information on the 3D target model in the 3D printing model and rolling the layout to obtain the required 3D printing model includes: S321, marking the required lighting information in the 3D target model in the 3D printing model; S322, extracting the outer contour of the 3D target model marked with the required lighting information to obtain a contour map of the required lighting information; S323, folding the contour map according to the first illumination range to obtain a multi-layer folded contour map, and aligning the folded contour map of each layer with the first illumination range in terms of orientation; S324, obtaining a correspondence between each layer of the folding contour image corresponding to the orientation and the sub-range on the first illumination range; S325, obtaining infrared lights corresponding to each layer of the folding contour map based on the corresponding relationship between the folding contour map and the sub-range of each layer and the sub-range bounded by space, the mapping channel and the projection range; S326, setting the infrared wavelength parameters of the infrared lamps in the corresponding infrared lamp array corresponding to each layer of the folding contour map to obtain a target infrared lamp array, and rolling layout the target infrared lamp array corresponding to each layer of the folding contour map according to the order before and after printing of the 3D target object; S327, using the 3D printing model after the rolling layout as the required 3D printing model; As described in the above steps S321-S327, the required lighting information is marked in the 3D target model, where the marking is performed according to the color distribution range, and then the outer contour of the 3D target model marked with the required lighting information is extracted to obtain a contour map of the required lighting information. Here, the distribution of the required lighting information according to the outer contour of the 3D target model is extracted as the contour map, and then the contour map is folded according to the first lighting range to obtain a multi-layer folded contour map, and the folded contour map of each layer is respectively oriented correspondingly to the first lighting range. Since it is based on the first The first illumination range is used for irradiation, where the first illumination range is the printing unit of the 3D target object printing process, such as the progressive range of a single print, and the folding contour map of each layer is the progressive range of a single print. Since the 3D target object model is in a posture in the illumination space model, the actual printing is also in accordance with the posture in the printing space of the 3D printing device. Therefore, the contour map is folded according to the first illumination range to obtain a multi-layer folding contour map, and the folding contour map of each layer is respectively oriented with the first illumination range, and the folding contour map of each layer corresponding to the orientation is obtained. The corresponding relationship between the sub-ranges can be obtained, and the range of unit irradiation on each layer of the folding contour map is the range corresponding to a single infrared lamp, and then the corresponding relationship between each layer of the folding contour map and the entire infrared lamp array can be obtained. The infrared lamps corresponding to each layer of the folding contour map are obtained based on the corresponding relationship between the folding contour map and the sub-range and the spatially bound sub-range, mapping channel and projection range. The infrared light wavelength parameters of the infrared lamps in the corresponding infrared lamp array are set corresponding to each layer of the folding contour map to obtain the target infrared lamp array, and the target infrared lamp array corresponding to each layer of the folding contour map is rolled and laid out according to the order before and after printing of the 3D target object. The rolling layout here is to sort the target infrared lamp array corresponding to each layer of the folding contour map according to the order before and after printing of the 3D target object, and after the target infrared lamp array irradiates the 3D target in the printing process, the next irradiation is sorted to the next target infrared lamp array until the entire 3D target object is printed, and the 3D printed model after the rolling layout is used as the required 3D printing model, which can ensure the accuracy and orderliness of the color change of the 3D target object during the printing process, and better ensure the printing quality of the 3D printed target object; In one embodiment, the step S4 of controlling the infrared light array and the ultraviolet light array to print the 3D target object according to the required 3D printing model includes: S41, printing the 3D target object according to the required 3D printing model, and in the process of printing the 3D target object, controlling the infrared light wavelength parameter of the infrared light array by scrolling the folded contour map to excite the color change of the 3D target object, wherein the infrared light wavelength parameter of the infrared light array excites the color change of the 3D target object in the following principle: the infrared excitation color change ultraviolet light curing 3D printing material is composed of resin and photoinitiator monomer, including auxiliary agents of infrared 760nm excitation red pigment, infrared 780nm excitation yellow pigment, infrared 800nm ​​excitation blue pigment and infrared 920nm excitation black pigment; S42, the UV lamp array is always on to solidify the 3D target object during the printing process until the printing of the 3D target object is completed; As described in the above steps S41 and S42, the infrared light wavelength parameters of the infrared light array are used to stimulate the color change of the 3D target. The target infrared light array corresponding to each layer of the folding contour map is scrolled and laid out according to the order of printing of the 3D target. The scrolling layout here is to sort the target infrared light array corresponding to each layer of the folding contour map according to the order of printing of the 3D target. After the target infrared light array irradiates the 3D target in the printing process, the next irradiation is sorted to the next target infrared light array until the entire 3D target is printed. The 3D printed model after the scrolling layout is used as the required 3D printed model, which can ensure the accuracy and orderliness of the 3D target excited to change color during the printing process, and better ensure the printing quality of the 3D printed target.

[0022] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Infrared excitation color change ultraviolet light curing 3D printing method, characterized in that: The following steps are involved: An infrared light array and an ultraviolet light array are set, and a lighting space model is constructed corresponding to the infrared light array and the ultraviolet light array; Determine a 3D target object model, and combine the 3D target object model with the illumination space model to obtain a 3D printing model; Obtain required lighting information of the 3D target model, layout the 3D printing model based on the required lighting information, and obtain the required 3D printing model; According to the required 3D printing model, the infrared light array and the ultraviolet light array are controlled to complete the printing of the 3D target object.

2. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 1, characterized in that: The step of setting the infrared light array and the ultraviolet light array and constructing a lighting space model corresponding to the infrared light array and the ultraviolet light array includes: Determine a first illumination space, and arrange an infrared light array according to the first illumination space; Determine a second illumination space, and arrange an ultraviolet lamp array according to the second illumination space; The lighting space model is constructed according to the infrared light array, ultraviolet light array and the printing space of the 3D printing equipment.

3. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 2, characterized in that: The step of determining the first illumination space and arranging the infrared light array according to the first illumination space includes: Determine a first layout range and a first illumination range, and obtain a space range between the first layout range and the first illumination range as a first illumination space; Divide the first illumination range into multiple sub-ranges, and project the multiple sub-ranges onto the first layout range in the first illumination space to obtain multiple sub-projection ranges; Infrared lamps are arranged corresponding to the multiple sub-projection ranges, and the infrared lamps corresponding to the multiple sub-projection ranges are associated to form an infrared lamp array.

4. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 3, characterized in that: The step of dividing the first illumination range into a plurality of sub-ranges, and mapping the plurality of sub-ranges in the first illumination space onto the first layout range to obtain a plurality of sub-projection ranges includes: Corresponding to the first illumination range, the first illumination range is divided according to the preset division unit to obtain a plurality of sub-ranges; Spatially superimposing the multiple sub-ranges to obtain mapping channels, until the mapping channel passes through the first layout range, the surface passing through the first layout range is used as the projection range, and the corresponding sub-ranges, mapping channels and projection range are spatially bound; Multiple sub-projection ranges are obtained through multiple sub-range spaces.

5. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 1, characterized in that: The step of determining a 3D target object model and combining the 3D target object model with the illumination space model to obtain a 3D printing model includes: Acquire the appearance information of the 3D target object, wherein the appearance information includes appearance shape and appearance color information, and construct a 3D target object model according to the appearance information; The 3D target model is constructed into the lighting space model to obtain a combined 3D printed model.

6. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 1, characterized in that: The step of obtaining the required illumination information of the 3D target model, and laying out the 3D printing model based on the required illumination information to obtain the required 3D printing model comprises: Obtaining corresponding required illumination information according to the shape color information on the 3D target model, wherein the required illumination information includes a required infrared light irradiation range and a corresponding required infrared light wavelength; The required lighting information is marked on the 3D target model in the 3D printing model and the required 3D printing model is obtained by rolling the layout.

7. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 6, characterized in that: The step of marking the required illumination information on the 3D target model in the 3D printing model and rolling the layout to obtain the required 3D printing model includes: Mark the required lighting information in the 3D target model in the 3D printing model; Extract the outer contour of the 3D target model marked with the required lighting information to obtain a contour map of the required lighting information; Folding the contour map according to the first illumination range to obtain a multi-layer folded contour map, and aligning the folded contour map of each layer with the first illumination range in terms of orientation; Acquire the corresponding relationship between each layer of the folding contour image corresponding to the orientation and the sub-range on the first illumination range; Based on the corresponding relationship between the folding contour map and the sub-range of each layer and the sub-range bounded by space, the mapping channel and the projection range, the infrared light corresponding to each layer of the folding contour map is obtained; Corresponding to each layer of the folding contour map, the infrared light wavelength parameters of the infrared light in the corresponding infrared light array are set to obtain the target infrared light array, and the target infrared light array corresponding to each layer of the folding contour map is rolled and laid out according to the order before and after printing of the 3D target object; The 3D printing model after the scrolling layout is used as the required 3D printing model.

8. The infrared-excited color-changing ultraviolet-curing 3D printing method according to claim 1, characterized in that: The step of controlling the infrared light array and the ultraviolet light array to print the 3D target object according to the required 3D printing model includes: The 3D target is printed according to the required 3D printing model. During the printing process of the 3D target, the infrared wavelength parameter of the infrared light array is controlled by the folded contour map of the scroll layout to excite the color change of the 3D target. The principle of the infrared wavelength parameter of the infrared light array to excite the color change of the 3D target is as follows: the infrared excitation color change ultraviolet light curing 3D printing material is composed of resin and photoinitiator monomers, including additives of infrared 760nm excitation red pigment, infrared 780nm excitation yellow pigment, infrared 800nm ​​excitation blue pigment and infrared 920nm excitation black pigment; The UV lamp array is always on to solidify the 3D object during the printing process until the printing of the 3D object is completed.

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