CN115256945A

CN115256945A - Model and support enhanced printing method and device, electronic equipment and storage medium

Info

Publication number: CN115256945A
Application number: CN202210632650.2A
Authority: CN
Inventors: 谢信福; 易瑜; 其他发明人请求不公开姓名
Original assignee: Shenzhen CBD Technology Co Ltd
Current assignee: Shenzhen CBD Technology Co Ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-01

Abstract

The application is suitable for the technical field of 3D printing, and provides a model and support enhanced printing method, device, equipment and storage medium, wherein the method mainly comprises the following steps: slicing and intercepting the triangular mesh of the model body and the triangular mesh of the supporting unit layer by layer according to the set layer height in different planes to obtain slice images of the closed path of the model body and the closed path of the supporting unit; selecting X-layer slice images from all Y-layer slice images as to-be-processed layer images; setting a pixel gray value in a closed path of a model body in the layer image to be processed as a first gray value, setting a pixel gray value in a closed path of the supporting unit as a second gray value and setting a pixel gray value outside the closed path as a third gray value; the gray scale difference slice image data is stored in a storage unit, and the image exposure time parameter is set to be the first duration and stored in the storage unit. The application can ensure the best printing quality of the model and can also strengthen the printing strength of the supporting unit.

Description

Model and support enhanced printing method and device, electronic equipment and storage medium

Technical Field

The application relates to the technical field of 3D printing, in particular to a model and support enhanced printing method, device, equipment and storage medium.

Background

The Three-dimensional (3D) printing technique is a novel rapid prototyping technique based on a digital model, and manufactures the model by printing layer by layer. In the existing photocuring 3D printing technology, a model body and support unit unified exposure forming mode is adopted, that is, the printing parameters of the printing model body and the printing parameters of the support unit are not differentiated, and especially, the gray value and exposure time parameters of the model body region on the whole slice image are completely consistent with the gray value and exposure time parameters of the support unit region on the whole slice image.

The printing method can ensure that the model printing is successful generally, but the situation that the model printing fails due to insufficient strength of the supporting unit is often encountered; for example, when the number of the supporting units is insufficient, or the strength of the supporting units is insufficient due to too short exposure time, the supporting units are broken when the model is stripped, so that the printing process of the model is interrupted, and printing fails; in order to solve the above problems, the model is usually preprocessed again to increase the number of supports, but the model is inconvenient to use; if the exposure time of the whole slice image is prolonged, the strength of the part of the supporting unit can be enhanced by ultraviolet irradiation to realize structural strength enhancement, but the model body is in an overexposure state, the final printing quality of the surface of the model body is deteriorated, and the printing quality of the model is lost; in the practical application process of the surface exposure layer forming and printing technology at the present stage, if the whole printing exposure time is prolonged just for strengthening the exposure of the supporting unit, the adhesion layer on the surface of the model is inevitably cured completely and cannot be cleaned, and further the printing quality and the fine effect are lost.

In addition, for the fragile part of the special model structure, the problems of support unit fracture and model body fracture during demoulding can be avoided only by increasing the number of the support units, and the use is inconvenient. If the overall printing exposure time is extended simply to intensify the exposure of the support unit, the overall printing quality is also necessarily lost.

In order to solve the problems, on the premise of maintaining the continuous printing process, the model body is kept at the normal and optimal printing quality, the exposure radiation intensity and the structural intensity of the supporting unit are further enhanced, so that a corresponding model and supporting enhanced printing method, device, equipment and storage medium are needed to be provided.

Disclosure of Invention

The embodiment of the application provides a model and support enhanced printing method, device, equipment and storage medium, aiming at further enhancing the exposure irradiation intensity and the structural intensity of a support unit while keeping the model body in the normal and optimal printing quality.

A first aspect of an embodiment of the present application provides a model and support enhanced printing method, including the following steps:

s100, obtaining a model body triangular mesh forming the 3D model, and generating a supporting unit triangular mesh by the model body triangular mesh;

s200, slicing and intercepting the triangular mesh of the model body and the triangular mesh of the supporting unit layer by layer according to the set layer height in different planes to obtain slice images of the closed path of the model body and the closed path of the supporting unit;

s300, selecting X-layer slice images from all Y-layer slice images as to-be-processed layer images;

s400, setting a pixel gray value in a closed path of a model body in the layer image to be processed as a first gray value, setting a pixel gray value in a closed path of a supporting unit as a second gray value, and setting a pixel gray value outside the closed path as a third gray value;

s500, storing the gray scale difference slice image data in a storage unit and setting the exposure time parameter of the gray scale difference slice image as a first duration and storing the first duration in the storage unit.

Optionally, said X = Y, or said X < Y; the X, Y is a positive integer.

Optionally, the first gray scale value is smaller than the second gray scale value and the third gray scale value is smaller than the first gray scale value, or the second gray scale value is smaller than the first gray scale value and the third gray scale value is smaller than the second gray scale value.

Still further, the method comprises the following steps:

s600, importing the gray difference slice image data and the printing parameters into a 3D printing device to perform 3D exposure printing.

Still further, the method comprises the following steps:

s550, changing the exposure time parameter of the gray scale difference slice image from the first time length to the second time length and storing the exposure time parameter of the slice image in a storage unit.

Optionally, the first duration is less than the second duration.

Still further, the method comprises the following steps:

and S560, setting the set value parameter of the irradiation intensity of the exposure light source of the gray-scale difference slice image from the first set value to the second set value and storing the set value parameter of the irradiation intensity of the exposure light source in the storage unit.

Optionally, the first set value is smaller than the second set value.

A second aspect of an embodiment of the present application provides a model and support enhanced printing apparatus, including:

the model body mesh acquisition and support unit mesh generation module is used for acquiring a model body triangular mesh forming the 3D model and then generating a support unit triangular mesh by the model body triangular mesh;

the closed path slicing and intercepting module is used for slicing and intercepting the model body triangular meshes and the supporting unit triangular meshes layer by layer in different planes according to the set layer height to obtain the slice images of the closed paths of the model bodies and the closed paths of the supporting units;

the image selection module of the layer to be processed is used for selecting X-layer slice images from all Y-layer slice images as the image of the layer to be processed;

the pixel gray value setting module is used for setting the pixel gray value in the closed path of the model body in the layer image to be processed as a first gray value, setting the pixel gray value in the closed path of the supporting unit as a second gray value and setting the pixel gray value outside the closed path as a third gray value;

and the exposure time parameter setting and image data storage module is used for storing the gray scale difference slice image data in the storage unit and setting the exposure time parameter of the gray scale difference slice image to be a first duration and storing the first duration in the storage unit.

Still further, the method further comprises:

and the 3D printing equipment is used for importing the gray difference slice image data and the printing parameters into the 3D printing equipment for 3D exposure printing.

Still further, the method further comprises:

and the exposure time parameter modifying and storing module is used for modifying the exposure time parameter of the gray difference slice image from a first time length to a second time length and storing the exposure time parameter of the slice image in the storage unit.

Still further, the method further comprises:

and the light source intensity parameter setting and storing module is used for setting the set value parameter of the irradiation intensity of the exposure light source of the gray difference slice image from a first set value to a second set value and storing the set value parameter of the irradiation intensity of the exposure light source in the storing unit.

A third aspect of embodiments of the present application provides a non-transitory computer readable storage medium storing a computer program that, when executed by a processor, implements the steps of any of the models and support enhanced printing methods described above.

A fourth aspect of the embodiments of the present application provides an electronic device, including: at least one processor; and a memory unit communicatively coupled to the at least one processor; wherein the storage unit stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of any of the above-described models and support enhanced printing methods.

A fifth aspect of embodiments of the present application provides a 3D printing apparatus, including a memory, a controller, and a computer program stored in the memory and executable on the controller, where the controller implements the steps of any one of the above-described model and support enhanced printing methods when executing the computer program.

Compared with the prior art, the beneficial effects of this application are:

1. according to the model and the support enhanced printing method provided by the first aspect of the embodiment of the application, the gray scale of the model body in the slice image or the gray scale of the support unit in the slice image are adjusted, and then the model body is subjected to 3D printing, so that the exposure irradiation intensity and the structural intensity of the support unit can be further enhanced while the model body is kept in the normal and optimal printing quality;

2. according to the model and support enhanced printing method provided by the first aspect of the embodiment of the application, when a batch of multi-model multi-gradient gray scale test printing is performed, under the condition that the overall printing exposure time duration is not changed, the strength of each model support unit can be kept consistent, so that each model can be successfully pulled out, the gray value of a slice image of each model body can be reduced in a gradient manner, and a printing model with gradient quality can be obtained, so that a best-quality model and a best printing gray value parameter can be conveniently obtained in a comparison manner;

3. the model and support-enhanced printing method provided by the first aspect of the embodiment of the application can enhance the overall strength of the supporting unit by performing gray value difference exposure on a plurality of model bodies and supporting units in a printing batch through generating difference gray values, and does not need to increase the number of the supporting units;

4. according to the model and support enhanced printing method provided by the first aspect of the embodiment of the application, after the short support is parallelly added at the slender position of the middle structure of a special model structure with strong structures at two ends and weak structures in the middle, such as a timing hourglass, the method can be used for slicing on the continuous layer thickness of the middle part in the area where the short support is located, and meanwhile, the strength of the model body and the strength of the support units are enhanced, so that the slender position of the middle structure of the model body can successfully realize demoulding in the printing process under the condition that the number of the support units is not increased, and the whole printing process is ensured to be successfully completed;

5. according to the model and support enhancement printing method provided by the embodiment of the application, for special model structures such as a timing hourglass with strong structures at two ends and weak structures in the middle, the structural strength of the model body can be enhanced by independently using the method in the continuous layer thickness area where the middle fine position is located, and the demolding in the printing process can be successfully realized at the fine position of the middle structure of the model body under the condition that the number of the supporting units is not increased, so that the whole printing process is smoothly finished.

Drawings

Fig. 1A is a flowchart of a model and support enhanced printing method 1 provided in an embodiment of the present application;

fig. 1B is a structural diagram of a model and support enhanced printing apparatus 1 according to an embodiment of the present disclosure;

fig. 2A is a flowchart of a model and support enhanced printing method 2 according to an embodiment of the present disclosure;

fig. 2B is a structural diagram of a model and support enhanced printing device 2 according to an embodiment of the present disclosure;

fig. 3A is a flowchart of a model and support enhanced printing method 3 provided in an embodiment of the present application;

fig. 3B is a structural diagram of a model and support enhanced printing device 3 according to an embodiment of the present application;

FIGS. 4A-C are schematic views of a section of the model body and support unit;

FIGS. 4D-E are schematic diagrams comparing slice images;

FIGS. 5A-B are schematic views of a mold release platform during 3D printing of a device;

FIG. 5C is a schematic diagram of the effect of embodiment 1 of the present application on the middle portion of the model using the method;

FIG. 5D is a schematic diagram illustrating the effect of embodiment 2 of the present application on the middle portion of the model using the method;

FIG. 6A is a block diagram of an electronic device implementing a model and support enhanced printing method according to an embodiment of the present disclosure;

FIG. 6B is a schematic diagram of an electronic device for pre-processing slices of a 3D model according to an embodiment of the present application;

FIG. 7A is a block diagram of a 3D printing apparatus for implementing the method model and the support enhanced printing method of the present application;

fig. 7B is a schematic diagram of importing sliced image data into a 3D printing device after the method of the present application is implemented.

Description of reference numerals:

a model body 41; the supporting unit 42; a fracture 50; a UV light source 51; an LCD screen 52; a resin tank 53; a base film 54; a photosensitive resin solution 55; a forming table 56; a first type shaping layer 58; a second type molding layer 59; the support unit enhances the printing section 421;

an electronic device 6; a computer program 60; a processor 61; a storage unit 62; the 3D printing apparatus 600; the print control program 670; a controller 671; a memory 672; a mobile storage device 7;

a slice image 410; a model body closed path 411; a support unit closed path 412; a first grayscale region 413; a second gray scale region 414; a third grayscale region 415;

a model ontology mesh acquisition and support unit mesh generation module 100; a closed path slice intercept module 200; a layer to be processed image selection module 300; a pixel gray value setting module 400; an exposure time parameter setting and image data storage module 500; an exposure time parameter modification and storage module 550; light source intensity parameter setting and storage module 560.

Detailed Description

In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

In addition, in the description of the present application, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Embodiments of the present application will be further described with reference to the drawings.

Fig. 1A is a flowchart of a model and support enhanced printing method 1 according to an embodiment of the present disclosure. As shown in the figure, the model and support enhanced printing method comprises the following steps:

s200, slicing and intercepting the triangular meshes of the model body and the triangular meshes of the supporting units layer by layer according to the set layer height in different planes to obtain slice images of the closed paths of the model body and the supporting units;

Still further, the method comprises the following steps:

Optionally, said X = Y, or said X < Y; x, Y is a positive integer.

Specifically, when X = Y, it indicates that all slice images of each layer are selected and the pixel grayscale value setting is performed as described in step S400; when X < Y, it means that a part of slice images are selected from all Y slice images to perform the pixel gray value setting as described in step S400; preferably, when a part of slice images are selected from all Y-slice images, slice images of successive slices are selected as appropriate.

Specifically, when the model body and the supporting unit are actually printed to perform model preprocessing on electronic equipment such as a computer, if the printing strength of the supporting unit is only required to be stronger than that of the model body, the first gray value can be set to any constant value between 1 and 254; the second gray scale value may be set to 255; the third gray scale value may be set to 0; if the printing intensity of the middle layers of the special structure part of the model body is stronger than that of the supporting unit, the first gray value can be set to be 255; the second gray value may be set to any constant value between 1-254; the third gray scale value may be set to 0;

correspondingly, when 3D printing equipment is used for printing, when a slice image is displayed on an LCD screen, the model body part is displayed as a white slightly-grey image with slightly low transmittance, the area where the supporting unit is located is displayed as a fully-transparent pure white image, and the rest part is displayed as an opaque pure black image; or the area where the middle layer slice image model body is located displays a full-light-transmission pure white image, the area where the supporting unit is located displays a white slightly-grey image with slightly low light transmittance, and the rest part displays a light-tight pure black image;

fig. 1B is a structural diagram of a model and support enhanced printing apparatus 1 according to an embodiment of the present application. As shown, a model and support enhanced printing apparatus, comprising:

a model body mesh obtaining and supporting unit mesh generating module 100, configured to obtain a model body triangular mesh constituting the 3D model and generate a supporting unit triangular mesh from the model body triangular mesh;

the closed path slicing and intercepting module 200 is used for slicing and intercepting the model body triangular meshes and the supporting unit triangular meshes layer by layer according to the set layer heights and different planes to obtain slice images of the closed paths of the model bodies and the closed paths of the supporting units;

a layer image to be processed selecting module 300, configured to select an X-layer slice image from all Y-layer slice images as a layer image to be processed;

the pixel gray value setting module 400 is configured to set a pixel gray value in a closed path of the model body in the layer image to be processed as a first gray value, set a pixel gray value in a closed path of the support unit as a second gray value, and set a pixel gray value outside the closed path as a third gray value;

an exposure time parameter setting and image data storing module 500 is used for storing the gray-scale difference slice image data in the storage unit and setting the exposure time parameter of the gray-scale difference slice image to be a first duration and storing the first duration in the storage unit.

Still further, it includes:

and the 3D printing device 600 is used for importing the gray difference slice image data and the printing parameters into the 3D printing device for 3D exposure printing.

Fig. 2A is a flowchart of a model and support enhanced printing method 2 according to an embodiment of the present disclosure. As shown in the figure, on the basis of fig. 1A, the present figure further includes the following steps:

Optionally, the first duration is less than the second duration.

Particularly, the strength of the resin after the molding of the model body and the supporting unit depends on the strength of ultraviolet irradiation received during the molding of the resin, so that if the first time length under the default exposure parameter is longer, the gray value of the pixel in the supporting unit area is maintained unchanged, and the gray value in the model body area is reduced, so that the exposure of the model body can be reduced, correspondingly, the molded model bodies with different fineness can be obtained, at the moment, the supporting unit can keep the curing strength unchanged, and the printing process can be maintained;

if the first time length under the default exposure parameter is proper, the pixel gray value of the support unit area is maintained to be unchanged, and the gray value of the model body area is reduced, at the moment, if the model body needs to maintain the exposure quantity to be kept at proper strength, the first time length under the exposure parameter needs to be prolonged, namely, the first time length is set as the second time length, at the moment, the exposure quantity of the model body is maintained to be proper, the printing quality can be ensured to be unchanged, the support unit can enhance solidification, the printing process can be maintained to be carried out, and meanwhile, the method is also suitable for the situation that the printing process can be maintained to be carried out without increasing the number of the support units.

Particularly, if the number of the supporting units is not enough, or the strength of the supporting units is not enough, when the molding flat belt adheres to the supporting units and drives the model body to be separated from the resin groove bottom film, a large adsorption force is generated to break the supporting units, and the printing process cannot be maintained at the moment.

Fig. 2B is a structural diagram of the model and support enhanced printing apparatus 2 according to the embodiment of the present application. As shown in the figure, on the basis of fig. 1B, the present figure further includes:

and an exposure time parameter modifying and storing module 550, configured to modify the exposure time parameter of the grayscale difference slice image from a first time length to a second time length and store the exposure time parameter of the slice image in a storage unit.

Fig. 3A is a flowchart of a model and support enhanced printing method 3 according to an embodiment of the present disclosure. As shown in the figure, on the basis of fig. 1A, the present figure further includes the following steps:

Optionally, the first set value is smaller than the second set value.

Particularly, the strength of the resin after the molding of the model body and the supporting unit depends on the strength of ultraviolet irradiation received during the molding of the resin, so that if the first time length under the default exposure parameter is maintained longer, the gray value of the pixel in the area of the supporting unit is maintained unchanged, and the gray value in the area of the model body is reduced, the exposure of the model body can be reduced, accordingly, the molding model bodies with different fineness can be obtained, at the moment, the supporting unit can keep the curing strength unchanged, and the printing process can be maintained;

if the first time length under the default exposure parameter is proper, the pixel gray value of the support unit area is maintained to be unchanged, the gray value of the model body area is reduced, at the moment, if the model body needs to maintain the exposure quantity to be kept at proper intensity, the irradiation intensity of the exposure light source needs to be enhanced at the moment, the set value parameter of the irradiation intensity of the exposure light source needs to be set to be a second set value from a first set value at the moment, the irradiation intensity of a UV light source of the 3D printing equipment is adjusted and enhanced according to the second set value, at the moment, the exposure quantity of the model body can also be maintained to be proper, the printing quality is ensured to be unchanged, the support unit can enhance solidification, the printing process can be maintained to be carried out, and meanwhile, the method can also be suitable for the situation that the printing process can be maintained to be carried out without increasing the number of the support units.

Fig. 3B is a structural diagram of a model and support enhanced printing apparatus 3 according to an embodiment of the present disclosure. As shown in the figure, on the basis of fig. 1B, the present figure further includes:

the light source intensity parameter setting and storing module 560 is configured to set the illumination intensity setting value parameter of the exposure light source of the gray scale difference slice image from the first setting value to the second setting value and store the illumination intensity setting value parameter of the exposure light source in the storage unit.

Fig. 4A-C are schematic views of a phantom body and support unit slice. As shown in the figure, a supporting unit 42 is added to the model body 41 in fig. 4A, and a three-dimensional display is performed; fig. 4B shows the mold body 41 and the supporting unit 42 in fig. 4A from the side; fig. 4C is a view showing slice images on different planes obtained by slicing the model body triangular mesh and the support unit triangular mesh layer by layer on the model body 41 and the support unit 42 according to the set layer height on the basis of fig. 3B.

Specifically, the layer height is set to be H mm; each of the different planes corresponds to J1-J7, respectively.

Fig. 4D-E are schematic diagrams comparing slice images. As shown in the figure, the slice images JB1-JB7 in fig. 4D are all the cases in the background art where the gray-scale value of the model body region on the whole slice image is completely consistent with the gray-scale value of the support unit region in the existing photocuring 3D printing technology.

The slice images JB1-JB7 in FIG. 4D each correspond to planes J1-J7 on FIG. 4C; taking a slice image JB3 as an example, where the slice image 410 is an entire region of a page of slice image, the model body closed path 411 corresponds to a closed path obtained by cutting out the model body triangular mesh on the plane where J3 is located in fig. 4C, and the support unit closed path 412 corresponds to a closed path obtained by cutting out the support unit triangular mesh on the plane where J3 is located in fig. 4C; still take slice image JB3 as an example, wherein, in particular, since the gray levels of the exposure regions of the model body and the support unit in the prior art are the same, the region enclosed by model body closed path 411 is also second gray level region 414, the region enclosed by support unit closed path 412 is also second gray level region 414, and the region outside model body closed path 411 and support unit closed path 412 is third gray level region 415;

accordingly, the pixels in the second gray scale region 414 may be set to the second gray scale value and the pixels in the third gray scale region 415 may be set to the third gray scale value.

The second gray value in the figure is set to be pure white, namely the gray value is 255; the third grey value is represented as pure black in a dense dot-filling pattern, i.e. the grey value is 0.

Similarly, the slice images 410 of other layers in fig. 4D each have a model body closed path 411 and/or a support unit closed path 412, a second gray scale region 414, and a third gray scale region 415; corresponding reference numerals have been omitted.

In contrast, the slice images JL1 to JL7 in fig. 4E are all the result examples of the difference between the gray-level value of the model body region and the gray-level value of the support unit region in the obtained overall slice image by using the method of the present technology.

The slice images JL1 to JL7 in fig. 4E each correspond to the planes J1 to J7 on fig. 4C; similarly, taking the slice image JL3 as an example, where the slice image 410 is an entire region of a page of slice image, the model body closed path 411 corresponds to a closed path obtained by cutting out the triangular mesh of the model body from the plane of J3 in fig. 4C, and the support unit closed path 412 corresponds to a closed path obtained by cutting out the triangular mesh of the support unit from the plane of J3 in fig. 4C; still take the slice image JL3 as an example, wherein, particularly, since the gray-level value of the model body region and the gray-level value of the support unit region have a difference under the method of the present application, the region enclosed by the model body closed path 411 is the first gray-level region 413, the region enclosed by the support unit closed path 412 is the second gray-level region 414, and the regions outside the model body closed path 411 and the support unit closed path 412 are the third gray-level region 415;

accordingly, the pixels in the first gray scale region 413 may be set to the first gray scale value, the pixels in the second gray scale region 414 may be set to the second gray scale value, and the pixels in the third gray scale region 415 may be set to the third gray scale value.

The first gray value in the figure is expressed as a middle gray value by a sparse dotted filling pattern, namely any constant value between 1 and 254; the second gray value is set to be pure white, namely the gray value is 255; the third gray value is represented as pure black in a dense dot-like filling pattern, i.e. the gray value is 0.

Similarly, each slice image 410 in fig. 4E has a model body closed path 411 and/or a support unit closed path 412, a first gray scale region 413 and/or a second gray scale region 414, and a third gray scale region 415; corresponding reference numerals have been omitted.

Fig. 5A-B are schematic diagrams of the demolding of the molding platform during the 3D printing device process. As shown in the figure, fig. 5A shows a process of performing model printing by using a 3D printing apparatus 600 in the existing photo-curing 3D printing technology, in the figure, an UV light source 51 emits ultraviolet light to transmit through an LCD screen 52 and a bottom film 54 of a resin tank 53, so that a photosensitive resin solution 55 in the resin tank 53 is photo-cured and formed, and at this time, a forming platform 56 is in a static state, so that a cured and formed supporting unit 42 does not need to drive a model body 41 to move upwards to separate from the bottom film 54.

However, in the printing process shown in fig. 5B, since the forming platform 56 needs to move upward, the forming platform 56 needs to adhere to the supporting units 42 to drive the model body 41 to be separated from the bottom film 54 upward, and since a large negative pressure exists in the film separating process, if the number of the supporting units 42 is small or the light curing forming strength is insufficient, the supporting units are broken due to the generation of the breaking openings 50, so that the model body 41 cannot continue to perform lifting printing movement with the forming platform 56, and printing cannot be maintained, which results in printing failure.

Fig. 5C is a schematic diagram illustrating the effect of embodiment 1 of the present application on the middle portion of the model. As shown in the figure, according to the method step S300, selecting X slice images from all Y slice images as layer images to be processed; if the gray value of the slice image of the middle H7-H10 layer is changed, specifically, for example, the gray value of the pixel in the closed path where the model body 41 is located on the slice image of the H7-H10 layer is set to 255; the gray value of the pixel in the closed path where the support unit 42 is located on the slice image of the H7-H10 layer is also set to 255; and the gray values of the pixels in the closed path in which the model body 41 and the supporting unit 42 are located on the slice images of the remaining layers are set to 230;

accordingly, the structural strength of the molding layers of the mold body 41 and the support unit 42 where the H7-H10 layers after the mold printing are located is greater than that of the rest layers, thereby playing a role in enhancing the printing strength of the fine positions.

Specifically, if the gray levels of pixels in the areas where the model body 41 and the supporting unit 42 are located on the slice images of the H7-H10 layers are the same, the supporting unit enhanced printing section 421 shown in the figure is additionally generated while the enhanced printing is performed on the model body 41 where the H7-H10 layers are located.

Fig. 5D is a schematic diagram illustrating an effect of embodiment 2 of the present application on a middle portion of a model. As shown in the figure, according to the method step S300, selecting X slice images from all Y slice images as layer images to be processed; if the gray value of the slice image of the middle H7-H10 layer is changed, specifically, for example, the gray value of the pixel in the closed path where the model body 41 is located on the slice image of the H7-H10 layer is set to 255; and the gray value of the pixel in the closed path where the support unit 42 is located on the slice image of the H7-H10 layer is set as 230; the gray values of the pixels in the closed path in which the model body 41 and the supporting unit 42 are located on the slice image of the rest layer are also set to 230;

correspondingly, according to the step S550 of the method, the exposure time parameter of the gray scale difference slice image is changed from the first time length to the second time length, and the exposure time parameter of the slice image is stored in the storage unit; the original set exposure time parameter needs to be modified from a first time length, such as 5s, to a second time length, such as 8s; specifically, if the gray value of the pixel in the region where the model body 41 is located on the H7-H10 layer sliced image is larger, and the gray value of the pixel in the region where the supporting unit 42 is located is smaller, the model body 41 on the H7-H10 layer can be enhanced in printing effect;

or correspondingly, according to the step S560 of the method of the present application, the set value parameter of the illumination intensity of the exposure light source of the gray scale difference slice image is set from the first set value to the second set value, and the set value parameter of the illumination intensity of the exposure light source is stored in the storage unit; the preset value of the illumination intensity of the original light source needs to be adjusted and increased, so that the illumination intensity of the UV light source on the 3D printing equipment is enhanced; the model body 41 of the H7-H10 layer can also be enhanced in printing effect; in particular, the UV light source 51 is illustrated in this figure as having an increased illumination intensity.

In the figure, the second molding layer 59 of the mold body 41, on which the printed H7-H10 layers of the mold are located, has a structural strength greater than that of the first molding layer 58 of the remaining layers on the mold body 41. Thereby also playing a role in enhancing the printing strength of the fine position.

Fig. 6A is a block diagram of an electronic device implementing a model and support enhanced printing method according to an embodiment of the present disclosure. As shown, the electronic device 6 in this figure takes a processor 61 as an example. As shown, an electronic device 6 includes a processor 61 and a storage unit 62; wherein the storage unit 62 stores a computer program 60 or instructions executable by the processor 61, the computer program 60 or instructions being executable by the processor 61 to enable the processor 61 to perform steps S100-S500 as in fig. 1A, or steps S100-S550 as in fig. 2A, or steps S100-S560 as in fig. 3A.

The storage unit 62 is a third aspect of the present application, and provides a non-transitory computer readable storage medium. The storage unit 62 stores instructions executable by the at least one processor 61, so that the at least one processor 61 implements steps S100 to S500 shown in fig. 1A, or implements steps S100 to S550 shown in fig. 2A, or implements steps S100 to S560 shown in fig. 3A when executed. The non-transitory computer readable storage medium of the present application stores computer instructions for causing a computer to perform steps S100-S500 as in fig. 1A, or steps S100-S550 as in fig. 2A, or steps S100-S560 as in fig. 3A.

The storage unit 62, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as when executed to implement program instructions/modules corresponding to steps S100-S500 in fig. 1A, or to implement program instructions/modules corresponding to steps S100-S550 in fig. 2A, or to execute program instructions/modules corresponding to steps S100-S560 in fig. 3A. The processor 61 executes various functional applications of the server and data processing, i.e., steps related to the computer and the processor in the embodiments corresponding to fig. 1A, fig. 2A, and fig. 3A described above, by executing the non-transitory computer program 60, instructions, and modules stored in the storage unit 62.

The storage unit 62 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the electronic device 6 using the method 2, and the like. In addition, the memory unit 62 may include a high speed random access memory module, and may also include a non-transitory memory module, such as at least one piece of disk memory, flash memory device, or other non-transitory solid state memory module. In some embodiments, the memory unit 62 optionally includes memory modules remotely located from the processor 61, which may be connected to the support structure generated electronics over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Various implementations of the systems and techniques described here can be realized in digital electronic circuitry, integrated circuitry, application specific ASICs (application specific integrated circuits), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input unit, and at least one output device.

These computer programs 60 (also known as programs, software applications, or code) include machine instructions for a programmable processor, and may be implemented using high-level procedural and/or object-oriented programming languages, and/or assembly/machine languages. As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and/or device (e.g., magnetic discs, optical disks, storage modules, programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and/or data to a programmable processor.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present application may be executed in parallel, sequentially, or in different orders, and the present invention is not limited thereto as long as the desired results of the technical solutions disclosed in the present application can be achieved.

FIG. 6B is a schematic diagram of an electronic device performing pre-processing slicing on a 3D model according to an embodiment of the present application. As shown in the figure, the user runs 3D slicing software through the electronic device 6, and uses a model and support enhanced printing method provided in the first aspect of the embodiment of the present application, and performs step S200, cuts and captures the model body triangular mesh and the support unit triangular mesh layer by layer according to the set layer height and obtains slice images of the closed path of each layer of the model body and the closed path of the support unit.

Fig. 7A is a structural block diagram of a 3D printing device for implementing the method model and the support enhanced printing method of the present application. As shown, a 3D printing apparatus 600 includes a controller 671 and a memory 672; wherein the memory 672 stores a print control program 670 or instructions executable by the controller 671, the print control program 670 or instructions being executable by the controller 671 to enable the controller 671 to perform steps S600 as in fig. 1A, or to perform steps S600 as in fig. 2A, or to perform steps S600 as in fig. 3A, or to perform steps S100-S600 as in fig. 1A, or to perform steps S100-S600 as in fig. 2A, or to perform steps S100-S600 as in fig. 3A.

Fig. 7B is a schematic diagram of importing sliced image data into a 3D printing device after the method of the present application is implemented. As shown in the figure, the user uses the mobile storage device 7 to import the gray difference slice image data and/or the printing parameters obtained by processing by the electronic device 6 into the 3D printing device 600 for 3D exposure printing, and then obtains an integral printing piece with enhanced printing obtained by the support unit and/or the middle part of the model body.

The above-described embodiments should not be construed as limiting the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A model and support enhanced printing method is characterized by comprising the following steps:

s400, setting a pixel gray value in a closed path of a model body in the layer image to be processed as a first gray value, setting a pixel gray value in a closed path of a supporting unit as a second gray value and setting a pixel gray value outside the closed path as a third gray value;

2. The model-and-support-enhanced printing method according to claim 1, wherein the selecting of the X-layer slice image as the layer image to be processed from the total Y-layer slice images comprises: the X = Y, or the X < Y; x, Y is a positive integer.

3. The model and support enhanced printing method according to claim 1, wherein the setting of the gray value of the pixels in the closed path of the model body in the image of the layer to be processed as the first gray value and the gray value of the pixels in the closed path of the support unit as the second gray value and the gray value of the pixels outside the closed path as the third gray value comprises:

the first gray scale value is smaller than the second gray scale value and the third gray scale value is smaller than the first gray scale value, or the second gray scale value is smaller than the first gray scale value and the third gray scale value is smaller than the second gray scale value.

4. The model-and-support-enhanced printing method of claim 1, further comprising the steps of:

5. The model-and-support-enhanced printing method of claim 1, further comprising the steps of:

6. The model-and-support-enhanced printing method of claim 5, wherein setting the grayscale difference slice image exposure time parameter from a first time duration to a second time duration comprises:

the first duration is less than the second duration.

7. The model-and-support-enhanced printing method of claim 1, further comprising the steps of:

s560, the set value parameter of the illumination intensity of the exposure light source of the gray scale difference slice image is set to a second set value from a first set value, and the set value parameter of the illumination intensity of the exposure light source is stored in a storage unit.

8. The model-and-support-enhanced printing method according to claim 7, wherein the setting of the illumination intensity setting value parameter of the exposure light source for the gray-scale difference slice image from a first setting value to a second setting value comprises:

the first set value is less than the second set value.

9. A model and support enhanced printing apparatus, comprising:

the model body mesh obtaining and supporting unit mesh generating module is used for obtaining a model body triangular mesh forming the 3D model and then generating a supporting unit triangular mesh by the model body triangular mesh;

10. The form and support enhanced printing apparatus of claim 9, further comprising:

11. The model and support enhanced printing apparatus of claim 9, further comprising:

12. The form and support enhanced printing apparatus of claim 9, further comprising:

and the light source intensity parameter setting and storing module is used for setting the irradiation intensity set value parameter of the exposure light source of the gray scale difference slice image from a first set value to a second set value and storing the irradiation intensity set value parameter of the exposure light source in the storage unit.

13. A non-transitory computer readable storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the steps of the model and support enhanced printing method according to any one of claims 1 to 8.

14. An electronic device, comprising: at least one processor; and a memory unit communicatively coupled to the at least one processor; wherein the storage module stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the model and support enhanced printing method as claimed in any one of claims 1 to 8.

15. A 3D printing apparatus comprising a memory, a controller and a computer program stored in the memory and executable on the controller, wherein the controller when executing the computer program implements the steps of the model and support enhanced printing method of any one of claims 1 to 8.