TWI674962B - Three dimensional printing method and three dimensional printing apparatus - Google Patents

Abstract

A three-dimensional printing method and a three-dimensional printing device. The stereo printing method includes: performing a voxelization operation on a space containing a stereo model to obtain a plurality of voxels corresponding to the space; selecting a first voxel including a first supporting point among the supporting points among the plurality of voxels; The voxel determines the first merged node among the plurality of merged nodes, where the first merged node is located at the second voxel among the plurality of voxels; the first support among the supports is printed according to the first support point and the first merged node .

Description

Three-dimensional printing method and three-dimensional printing device

The present invention relates to a printing method, and more particularly, to a three-dimensional printing method and a three-dimensional printing device.

In the three-dimensional printing technology, when there is an overhang area in the three-dimensional model to be formed (that is, the three-dimensional model has space relative to the platform there), the three-dimensional printing device needs to synchronize the three-dimensional columns between the overhang area and the platform. A support structure is printed, wherein the support structure is composed of a plurality of support members and support points, so as to avoid the stress concentration or deformation of the three-dimensional model on the structure caused by the suspended area.

The three-dimensional model usually grows a support head from a support point on the surface of the model according to a specific angle corresponding to the surface of the model, and then grows a plurality of supports through the support head. It is worth noting that in the conventional technology, when a three-dimensional model grows a support head according to the surface of the model, the three-dimensional printing device is less able to elastically select the angle of the support head, thereby making the support head more difficult to grow during the growth process. Easy access to the three-dimensional model. In addition, when the three-dimensional model grows the support head according to a specific angle, and when the angle between the specific angle and the surface normal direction of the three-dimensional model is included, When it is too large, since the contact area between the support head and the surface of the model is relatively large, the surface of the three-dimensional model will be easily damaged.

On the other hand, in the conventional technology, the support is usually connected to the model through at least one support tail. When connected to a model through a single support tail, the support tail typically requires a larger diameter. In this case, when the supporting structure needs to be removed from the model, the supporting tail is relatively destructive to the surface of the model. In addition, when connecting to the model through multiple support tails, because these support tails usually begin to grow near the end of the support, the contact angle at which these support tails choose to connect to the model will be limited , And thus cannot find the optimal contact angle.

The decision method for determining the support usually requires a large amount of calculation time, which affects the calculation time of the processor. Therefore, how to effectively optimize the technology of merging support points and supports and improve the shortcomings of the support head and the support tail, so as to improve the speed and quality of three-dimensional printing, will be the main issue for developers in the field.

The invention provides a three-dimensional printing method and a three-dimensional printing device for printing a three-dimensional model with a suspended area.

The invention provides a three-dimensional printing method for a three-dimensional printing device. The three-dimensional printing device is used to print a three-dimensional model and a support for supporting the three-dimensional model so that the three-dimensional model is formed on a platform. The support is connected to correspond to the three-dimensional model. Support point. The stereo printing method includes: performing a voxelization operation on a space containing a stereo model To obtain a plurality of voxels corresponding to the space; select a first voxel including a first support point among the support points among the plurality of voxels; determine a first merge node of the plurality of merge nodes according to the first voxel, where the first The merged node is a second voxel of a plurality of voxels; the first support of the supports is printed according to the first support point and the first merged node, wherein the first support has a first sub-support and a second sub-support The first end of the first sub-support is connected to the first merge node, the first end of the second sub-support is connected to the first merge node, and the second end of the second sub-support is connected to the first support point.

The invention provides a three-dimensional printing device including a platform, a print head, and a processor. The printing head is used to print the three-dimensional model and the supporting member supporting the three-dimensional model on the platform, wherein the supporting member is connected to the supporting point corresponding to the three-dimensional model. The processor is configured to perform a voxelization operation on a space containing a solid model to obtain a plurality of voxels corresponding to the space; select a first voxel including a first support point among the plurality of voxels, and determine according to the first voxel A first merge node among the plurality of merge nodes, where the first merge node is located at a second voxel among the plurality of voxels, and the first support among the supports is printed according to the first support point and the first merge node. The first support member has a first sub-support member and a second sub-support member. A first end of the first sub-support member is connected to the first merge node, and a first end of the second sub-support member is connected to the first merge node and the second The second end of the sub-support is connected to the first support point.

Based on the above, the three-dimensional printing method and the three-dimensional printing device in the present invention can use a processor to perform a voxelization operation on a space containing a three-dimensional model, so that each voxel in the space can record the volume. Whether a voxel exists, and whether the support points in each voxel are connected to a voxel or platform News. In this way, in the process of growing the support, the present invention can enable the support to effectively avoid the three-dimensional model according to the related information, so as to shorten the time for searching for a growth path, and thereby improve the quality of three-dimensional printing.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

100‧‧‧Three-dimensional printing device

110‧‧‧platform

120‧‧‧Print head

130‧‧‧ processor

600 、 GT1‧‧‧The first type of support tail

A1‧‧‧First angle

BB‧‧‧ bounding box

D1 ~ D5‧‧‧ direction

GT2‧‧‧Second type support tail

L1 ~ L3, L1A ~ L3A‧‧‧Floor

MP1 ~ MP4, MP3‧‧‧ merge nodes

OBJ‧‧‧3D model

OSP1 ~ OSP3‧‧‧ original support points

P1‧‧‧Part I

P2‧‧‧Part Two

Q1, Q2‧‧‧ connection points

SPA ~ SPC, SP1 ~ SP3‧‧‧Support Points

SIA‧‧‧Support

SI1 ~ SI3‧‧‧Sub-support

S310 ~ S360, S510 ~ S530‧‧‧steps

SST1‧‧‧First child support tail

SST2‧‧‧Second Child Support Tail

SPX1‧‧‧first support

SPX2‧‧‧Second Support

VX1 ~ VXN, VXA, VXB, VX20 ~ VX28‧‧‧Voxels

FIG. 1 is a schematic diagram of a three-dimensional printing apparatus according to an embodiment of the present invention.

FIG. 2A is a schematic diagram of a scenario of a three-dimensional printing method according to an embodiment of the present invention.

FIG. 2B is a schematic diagram of a scenario of a three-dimensional printing method according to another embodiment of the present invention.

FIG. 2C is a schematic diagram of a process of searching for a voxel in which a merge node exists according to the embodiment shown in FIG. 2B.

FIG. 3 is a flowchart of a three-dimensional printing method according to an embodiment of the invention.

FIG. 4A is a schematic diagram of a third sub-support member according to an embodiment of the present invention.

4B is a schematic diagram of a voxel distribution of a third sub-support member according to an embodiment of the present invention.

FIG. 4C is a schematic diagram of a voxel searching process of a third sub-support member according to an embodiment of the present invention.

FIG. 5 is a flowchart of a three-dimensional printing method according to another embodiment of the present invention.

FIG. 6A is a schematic diagram of a first type of support tail according to an embodiment of the present invention.

FIG. 6B is a schematic diagram of a first type of support tail according to another embodiment of the present invention.

FIG. 7 is a simulation result diagram of printing on a column according to an embodiment of the present invention.

Reference will now be made in detail to the present exemplary embodiments, examples of which are illustrated in the accompanying drawings. In addition, wherever possible, the same reference numbers are used in the drawings and embodiments to represent the same or similar parts.

FIG. 1 is a schematic diagram of a three-dimensional printing apparatus according to an embodiment of the present invention. Referring to FIG. 1, the three-dimensional printing apparatus 100 includes a platform 110, a print head 120, and a processor 130. The print head 120 is coupled to the processor 130. The printing head 120 is used for printing the three-dimensional model OBJ and the supporting member SIA supporting the three-dimensional model OBJ on the platform 110. The support SIA is located in a space (ie, a suspended area) of the three-dimensional model OBJ. Among them, the support member SIA is connected to the corresponding three-dimensional model OBJ through the support point SPA, and the support member SIA supports the GT1 and the second type through the first type. The tail GT2 is supported to be connected to the stereo model OBJ and the platform 110, respectively.

In this embodiment, the processor 130 may be controlled by an electronic device having a computing function (for example, a computer device such as a notebook computer, a tablet computer, or a desktop computer). The user can edit and process the three-dimensional model OBJ of a three-dimensional object through the electronic device, and send the relevant parameters and information of the three-dimensional model OBJ to the print head 120 through the processor 130 to instruct the print head 120 to The above-mentioned parameters and information are printed on the platform 110 for the three-dimensional model OBJ and the support SIA.

The processor 130 in this embodiment may be, for example, a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor (Microprocessor), digital signal processor (Digital Signal Processor, DSP), programmable controller, Application Specific Integrated Circuits (ASIC), Programmable Logic Device (PLD) or other similar devices or a combination of these devices, which can be loaded and Running a computer program, the present invention is not limited to this.

Please refer to FIG. 1, FIG. 2A, and FIG. 3 at the same time. FIG. 2A is a schematic diagram of a scenario of a three-dimensional printing method according to an embodiment of the present invention. In addition, FIG. 3 is a flowchart of a three-dimensional printing method according to an embodiment of the present invention. The three-dimensional printing method in this embodiment is applicable to the three-dimensional printing device 100 in FIG. 1. The detailed steps of the three-dimensional printing method in this embodiment are described below with the components in the three-dimensional printing device 100. It should be noted that, in the embodiment of FIG. 2A of the present invention, description is made in a three-dimensional space at a side view angle, and each individual element is formed in a three-dimensional structure.

First, in step S310, the processor 130 may use a bounding box to select a stereo model OBJ, so that the stereo model OBJ is located in a space formed inside the bounding box BB. Wherein, the space selected by the bounding box BB in FIG. 2A is only represented as the support SIA part of the three-dimensional model OBJ, and this part is used as a scenario description of the embodiment of the present invention.

In step S320, the processor 130 may perform a voxelization operation on the three-dimensional model OBJ of the space formed inside the bounding box BB, so that the processor 130 obtains a number corresponding to the support SIA in the space. Voxels VX1 ~ VXN. Further, each square in FIG. 2A may be represented as a plurality of voxels VX1 to VXN in the space, respectively. For the convenience of description, FIG. 2A of the present invention uses voxels VX1 to VX5 as an embodiment to illustrate the scenario, but the present invention is not limited thereto. It is worth mentioning that in this embodiment, each voxel VX1 ~ VXN can record whether the voxel contains a part of the stereo model OBJ, and each voxel VX1 ~ VX5 can record the corresponding support point in the voxel. Or merge information about whether the node is connected to the stereo model OBJ or platform 110. With this, the present invention can voxelize the three-dimensional model OBJ of the space formed inside the bounding box BB, so that the support SIA can effectively avoid the three-dimensional model OBJ during the process of growing the support SIA, And shorten the time to search for growth paths.

In step S330, the processor 130 may apply related technologies of growth support points that are well known to those skilled in the art to make the surface of the three-dimensional model OBJ generate multiple original support points OSP1 to OSP3. Then, the processor 130 may generate a plurality of support points SP1 to SP3 (also referred to as the first A support point). Among these, the support points SP1 ~ SP3 are located in the normal direction of the surface of the three-dimensional model OBJ, and the support points SP1 ~ SP3 and the original support points OSP1 ~ OSP3 are respectively a predetermined distance (for example, a voxel distance). , But the invention is not limited to this).

In step S340, the portion selected by the bounding box BB has a plurality of support points, and FIG. 2A only uses three support points SP1 to SP3 as an illustrative example. Therefore, in the present embodiment, the processor 130 may select a voxel VX1 to VX3 having support points SP1 to SP3 as the first voxel from the plurality of support points. Thereby, the processor 130 can obtain the relevant information recorded in each voxel VX1 ~ VX3 by selecting these voxels VX1 ~ VX3, and the processor 130 can plan to grow the support member SIA according to the relevant information. path.

In step S350, the processor 130 may determine whether the merged nodes MP1 and MP2 are located in the voxels VX1 ~ VXN according to the relevant information recorded in the selected voxels VX1 ~ VX3 (also referred to as the first voxel). Which voxel.

Further, in step S350, it is assumed that the processor 130 first generates the support point SP2 according to the original support point OSP2, and then, the processor 130 may generate the support point SP2 according to the body where the support point SP2 (also referred to as the second support point) is located. The voxel VX2 (also referred to as the third voxel) is used to determine whether a merged node is located in the first direction of the voxel VX2 (for example, below the voxel VX2) in the space formed inside the bounding box BB. For example, in an embodiment of the present invention, when the processor 130 determines that there is no merge node in the first direction of the voxel VX2, the processor 130 will move to the second direction corresponding to the voxel VX2 in the space. (For example, the voxel VX2 is 45 degrees downward.) Search for multiple voxels. In addition, when the processor 130 determines that a voxel VX1 having a support point SP1 exists above the voxel VX4, the processor 130 will determine that the merged node MP1 grows in the voxel VX4. In other words, the voxel VX4 (also referred to as the second voxel) is located in the first direction of the voxel VX1 (also referred to as the fourth voxel) including the support point SP1.

On the other hand, when the processor 130 determines that a merge node exists in the first direction of the voxel VX2, the processor 130 instructs the voxel VX2 to search in the first direction to determine the position of the voxel corresponding to the merge node.

In addition, when the processor 130 determines that there is no merge node in the first direction of the voxel VX2, and the processor 130 cannot search for these voxels VX1 ~ VXN in the second direction in the space according to the position of the voxel VX2. When the voxels of the nodes are merged, the processor 130 then executes the action of step S360.

It should be noted that, in another embodiment, assuming that the processor 130 first generates the support point SP2 according to the original support point OSP2 and the support point SP2 is located near the edge of the bounding box BB, the following figure 2B and FIG. The 2C example searches for voxels with merged nodes based on the position of the support point SP2. Specifically, FIG. 2B is a schematic diagram of a scenario of a three-dimensional printing method according to another embodiment of the present invention. It should be noted that FIG. 2C is a schematic diagram of a process of searching for a voxel in which a merge node exists according to the embodiment shown in FIG. 2B. Wherein, FIG. 2B illustrates the three-dimensional space at a side view. FIG. 2C is a top view drawn in a three-dimensional space at an angle at which the support point SP2 located at the layer L1A is viewed from the next layer (for example, the layer L2A).

In the embodiment of FIG. 2B of the present invention, it is assumed that the processor 130 first When the starting support point OSP2 is used to generate the support point SP2, and the voxel VX2 (also referred to as the third voxel) at this time is located near the edge of the bounding box BB, the processor 130 may determine the bounding box BB according to the voxel VX2. In the space formed inside, is there any merge node located in the first direction of the voxel VX2 (for example, below the voxel VX2). When the processor 130 determines that there is no merge node in the first direction of the voxel VX2, the processor 130 searches downwards layer by layer (for example, layers L2A ~ L3A, and so on) according to the layer L1A where the voxel VX2 is located. Whether there are voxels with merge nodes.

In detail, the multiple voxels in this embodiment are respectively located in multiple layers (for example, layers L1A to L3A, where the number of layers is not limited to 3 layers). In FIG. 2B and FIG. 2C, the voxel VX20 located in the layer L2A is positioned directly below the voxel VX2. Further, when the voxel VX2 at which the support point SP2 is located is at the layer L1A, and the voxel VX2 at this time is located adjacent to the edge of the bounding box BB, the processor 130 may according to the layer L1A at which the voxel VX2 is located , Searching for multiple voxels in which the merge node MP3 (also referred to as the second merge node) and the merge node MP4 (also referred to as the third merge node) (not shown) are searched layer by layer (for example, layers L2A ~ L3A). Taking searching for voxels with merged nodes MP3 as an example, in the layer L2A, the processor 130 may search for voxels with merged nodes from the extension direction of voxels VX2 to voxels VX21 to VX25 layer by layer. For example, the processor 130 may search for a voxel with a merge node from the extension direction of the voxel VX2 to the voxel VX21 (such as the direction D1) layer by layer; the processor 130 may move from the voxel VX2 to the Extension direction (such as direction D2) searches layer by layer for voxels with merged nodes; processor 130 can extend from voxel VX2 to voxel VX23 (For example, direction D3) layer-by-layer search for voxels with merged nodes; processor 130 may search for voxels with merged nodes from voxel VX2 to vX24 extension direction (for example, direction D4) layer-by-layer. The processor 130 may search for a voxel with a merged node layer by layer from the extension direction (for example, direction D5) of the voxel VX2 to the voxel VX25. Among them, since the voxels VX26 to VX28 are located at the edge of the bounding box BB, the processor 130 cannot search for a voxel with a merged node from the extension direction of the voxel VX2 to the voxel VX26 to VX28.

In this case, from the perspective of viewing, in FIG. 2B and FIG. 2C, it is assumed that the processor 130 can determine that there is a support point SPB above the voxel VXB in the direction D3 ( Also referred to as the fourth support point), the processor 130 may generate a merge node MP3 on the voxel VXB.

In contrast, in the embodiments of FIG. 2B and FIG. 2C, the processor 130 can also use the same search method to find another voxel in which the merge node MP4 (not shown) exists. In other words, the processor 130 may also search for voxels with the merged node MP4 layer by layer from at least one of the directions D1 to D5. For example, in terms of viewing angles, in FIG. 2B and FIG. 2C, it is assumed that the processor 130 can determine that the voxel VXC is above a certain voxel VXC (not shown) in the direction D4. When there is a support point SPC (not shown, also referred to as a fifth support point), the processor 130 may generate a merge node MP4 at the voxel VXC.

In other words, if the processor 130 can search for the voxels (for example, voxel VXB and voxel VXC) of the merge node MP3 and the merge node MP3 from the direction D3 and the direction D4 of the voxel VX2, the subsequent printing is performed. in the process of, The processor 130 may instruct the print head 120 to print the first support member from the voxel VX2 to the extension direction of the voxel VX23 according to the support point SP2 and the merge node MP3. In addition, the processor 130 may instruct the print head 120 to print another first support member from the voxel VX2 to the voxel VX24 extending direction according to the support point SP2 and the merge node MP4.

On the other hand, when the processor 130 cannot search for multiple voxels with the merge node MP3 and the merge node MP4 (not shown) in the directions D1 to D5 of the voxel VX2, because the processor 130 cannot be in the direction D1 at this time A voxel in which the merge node MP3 and the merge node MP4 exist is searched in at least 2 directions of ~ D5. If the processor 130 prints the first in the direction D3 and direction D4 of the voxel VX2 in the subsequent printing process Supporting members, the supporting force of these first supporting members may be insufficient. In this case, during subsequent printing, the processor 130 will instruct the print head 120 to print the first support in the first direction of the position of the voxel VX2 (for example, below the voxel VX2) according to the support point SP2. Pieces. The first support member does not include the merge node MP3 and the merge node MP4.

It should be noted that please refer to FIG. 2A again. In the embodiment of FIG. 2A, the processor 130 may determine the sequence of merging nodes according to each support point SP1 to SP3. For example, in some embodiments of the present invention, the processor 130 may first search for a merged node according to the support point SP2, then search for a merged node according to the support point SP1, and finally search for a merged node according to the support point SP3. In addition, in other embodiments of the present invention, the processor 130 may also search for a merged node according to the support point SP1, then search for a merged node according to the support point SP2, and finally search for a merged node according to the support point SP3. In other words, in various embodiments of the invention In the embodiment, the order of merging nodes according to the support points is not limited to the above manner.

Continuing the example of FIG. 2A, in step S360, the processor 130 may instruct the print head 120 to print the first support member in the support member SIA according to the support points SP1 to SP2 and the merge node MP1. The first support member is composed of a first sub-support member SI1, a second sub-support member SI2, and a third sub-support member SI3. Specifically, the first end of the first sub-support SI1 is connected to the merge node MP1. The first end of the second sub-support SI2 is connected to the merging node MP1, and the second end of the second sub-support SI2 is connected to the support point SP1.

Regarding the third sub-support SI3 of the present invention, please refer to FIGS. 1 to 4A at the same time. FIG. 4A is a schematic diagram of the third sub-support according to an embodiment of the present invention. The first end of the third sub-support SI3 is connected to the second end of the second sub-support SI2, and the second end of the third sub-support SI3 is connected to the original support point OSP1. In other words, in step S360, the processor 130 can make the original support point OSP1 according to the normal direction of the surface of the three-dimensional model OBJ, and print the third sub-support SI3 through the print head 120 to make the original support point OSP1 can be connected to the support point SP1 through the third sub-support SI3. Thereby, the third sub-supporting element SI3 of this embodiment can effectively reduce the surface area in contact with the three-dimensional model OBJ. In addition, when the processor 130 needs to remove the third sub-support SI3 from the surface of the three-dimensional model OBJ, the possibility of the surface of the three-dimensional model OBJ being damaged can also be reduced.

It is worth mentioning that regarding the growth process of the third sub-support SI3 connected to the second sub-support SI2, please refer to FIGS. 4A to 4C at the same time, and FIG. 4B is in accordance with the present invention. A schematic diagram of the voxel distribution of the third sub-support member according to an embodiment of the invention. In addition, FIG. 4C is a schematic diagram of a voxel searching process of the third sub-support member according to an embodiment of the present invention. First, in the embodiment of FIG. 4B, multiple voxels may form multiple layers. These layers include, for example, layers L1 to L3, where the layers L1 to L3 are adjacent to each other. It is assumed that the voxel VXA where the original support point OSP1 is located is located at the layer L1 (also referred to as the first layer). The processor 130 may determine the support point SP1 at one of a plurality of voxels in the layer L2 (also referred to as the second layer) (for example, 9 voxels of the layer L2 in FIG. 4C). For example, the processor 130 may determine that the support point SP1 is located at the voxel VX1 of the layer L2. Next, the original support point OSP1 in the voxel VXA may grow a third sub-support SI3 from the layer L1 to the layer L2 according to the normal direction of the surface of the three-dimensional model OBJ, and connect the third sub-support SI3 to the body Support point SP1 in VX1. In this way, the third sub-support SI3 can be connected to the second sub-support SI2.

For details of the operation of step S360, please refer to FIG. 2A and FIG. 5 at the same time. FIG. 5 is a flowchart of a three-dimensional printing method according to another embodiment of the present invention. In step S510, the processor 130 first determines that the first end of the first sub-support SI1 of the support SIA is connected to the three-dimensional model OBJ or the platform 110. For example, in step S520, when the processor 130 determines that the first end of the first sub-support SI1 is connected to the three-dimensional model OBJ, the processor 130 may instruct the print head 120 to be at the first position of the first sub-support SI1. The first-type support tail GT1 is printed on the end, so that the first sub-support SI1 of the support SIA can be connected to the three-dimensional model OBJ through the first-type support tail GT1.

Further, for the structure of the first type supporting tail GT1, please refer to 6A, FIG. 6A is a schematic diagram of a first type of support tail according to an embodiment of the present invention. In this embodiment, the first type of support tail 600 includes a first sub-support tail SST1 and a second sub-support tail SST2. The second sub-support tail SST2 includes a first portion P1 and a second portion P2. In addition, the total number of the first sub-support tail SST1 and the second sub-support tail SST2 of the first-type support tail 600 in this embodiment may be three, but the present invention is not limited thereto. In other embodiments, the first type of support tail 600 may have more second sub-support tails SST2. On the other hand, in this embodiment, the first end of the first sub-support tail SST1 is located in an integrin, and the second end of the second part of the second sub-support tail SST2 is located in another voxel. In particular, the voxel where the first end of the first sub-support tail SST1 is located and the other voxel where the second end of the second part of the second sub-support tail SST2 is located are on the same straight line.

In FIG. 6A, the first end of the first portion P1 is connected to the connection point Q1 on the first sub-support tail SST1, so that the angle between the first portion P1 and the first sub-support tail SST1 is at a first angle A1. The second end of the first part P1 is connected to the first end of the second part P2, and the second end of the second part P2 is connected to the surface of the three-dimensional model OBJ. In other words, the second end of the first sub-support SI1 can be connected to the surface of the three-dimensional model OBJ through the first sub-support tail SST1. It is worth mentioning that, in this embodiment, the direction of the first sub-support tail SST1 is the same as the normal vector of the surface of the solid model OBJ, and the direction of the second part P2 is the same as the normal vector of the surface of the solid model OBJ. In this way, the first sub-supporting element SI1 can use the first type of supporting tail GT1 to improve the pulling force of the supporting element SIA as a whole to the three-dimensional model OBJ.

On the other hand, in step S530, when the processor 130 determines the first sub-branch When the first end of the support SI1 is connected to the platform 110, the processor 130 may instruct the print head 120 to print the second type of support tail GT2 on the first end of the first sub-support SI1, so that the first of the support SIA The sub-support SI1 can be connected to the platform 110 through the second-type support tail GT2. The second-type support tail GT2 in this embodiment may be, for example, a disc model. That is, when the processor 130 determines that the second end of the first sub-support SI1 is connected to the platform 110, the second end of the first sub-support SI1 may be connected to the platform 110 through the disc model.

FIG. 6B is a schematic diagram of a first type of support tail according to another embodiment of the present invention. In another embodiment of the present invention, the processor 130 may further determine that the first end of the second support member SPX2 in the support member SIA is connected to the three-dimensional model OBJ with the support tail 600 of the first type. Further, in FIG. 6B, when the processor 130 determines whether the first part of the second sub-support tail SST2 in the first support member SPX1 and the first part of the second sub-support tail SST2 in the second support member SP2 The phase is connected to a connection point Q2.

Next, when the processor 130 determines that the first portion P1 of the second sub-support tail SST2 in the first support SP1 and the first portion P1 of the second sub-support tail SST2 in the second support SP2 are connected to the connection point Q2, Then, the processor 130 instructs the print head 120 to print the second portion P2 of the second sub-support tail SST2 in the first support member SP1.

In FIG. 6B, the first end of the second portion P2 of the second sub-support tail SST2 in the first support SPX1 is connected to the first portion P1 of the second sub-support tail SST2 in the first support SPX1 and the second support. Second sub-support tail in SPX2 The first part P1 of SST2 and the second end of the second part P2 of the second sub-support tail SST2 in the first support SPX1 are connected to the surface of the three-dimensional model OBJ. In other words, in this embodiment, the support member SIA can pass through a plurality of first-type support tails, and make the second part of the second sub-support tail of each first-type support tail share and connect with each other, so that the density at the support point In higher cases, avoid the support SIA from damaging the surface of the three-dimensional model OBJ, and increase the overall tensile force of the support SIA.

FIG. 7 is a simulation result diagram of printing on a column according to an embodiment of the present invention. In this embodiment, the space formed inside the bounding box BB includes a three-dimensional model OBJ, a support SIA, a first-type support tail GT1, and a second-type support tail GT2. The description of each component in FIG. 7 and the method of three-dimensional printing are described in detail in the implementation details of FIG. 1 to FIG. 6B, and are not repeated here.

In summary, the three-dimensional printing method and the three-dimensional printing device of the present invention can use a processor to perform a voxelization operation on a space containing a three-dimensional model, so that each voxel in the space can record the voxel. Relevant information such as whether a voxel exists in the three-dimensional model, and whether the support points in each voxel are connected to the three-dimensional model or platform. In this way, in the process of growing the support, the present invention can enable the support to effectively avoid the three-dimensional model according to the related information, so as to shorten the time for searching for a growth path, and thereby improve the quality of three-dimensional printing.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (6)

A three-dimensional printing method for a three-dimensional printing device for printing a three-dimensional model and a support for supporting the three-dimensional model so that the three-dimensional model is formed on a platform. The support is connected to a support point corresponding to the three-dimensional model, and the three-dimensional printing method includes: determining that a first end of a first support in the support is connected to the three-dimensional model or the platform ; When the first end of the first support in the support is connected to the three-dimensional model, it is determined that the first end of the first support is connected to the three-dimensional with a first-type support tail; A model; and printing the first-type support tail on a first end of the first support, wherein the first-type support tail includes a first sub-support tail and a second sub-support tail, and the first The two sub-support tails include a first part and a second part. The first sub-support tail is connected to the surface of the three-dimensional model and the direction of the first sub-support tail is the same as the normal vector of the surface of the three-dimensional model. First end of the first part A connection point on the first sub-support tail is connected so that the first portion is at a first angle with the clamping foot of the first sub-support tail, and the second end of the first portion is connected to the second portion. First end, the second end of the second part is connected to the surface of the three-dimensional model, and the direction of the second part is the same as the normal vector of the surface of the three-dimensional model. According to the three-dimensional printing method described in the first patent application scope, the method further includes: Determine that a first end of a second support in the support is connected to the three-dimensional model with the first type of support tail, wherein the first end is printed on the first end of the first support The step of supporting the tail includes determining whether a first portion of the second sub-support tail in the first support is connected to a first portion of the second sub-support tail in the second support. A connection point; and when a first portion of the second sub-support tail in the first support member and a first portion of the second sub-support tail in the second support member are connected to the connection point , Printing a second portion of the second sub-support tail in the first support, wherein a first end of a second portion of the second sub-support tail in the first support is connected to the A first part of the second sub-support tail in the first support member and a first part of the second sub-support tail in the second support member, and the second sub-support in the first support member The second end of the second part of the support tail is connected to the surface of the three-dimensional model. The three-dimensional printing method according to item 1 of the scope of patent application, wherein the voxels at which the first end of the first sub-support tail is located and the second end of the second part of the second sub-support tail Lying voxels lie on the same straight line. A three-dimensional printing device includes: a platform; A print head for printing a three-dimensional model and a support for supporting the three-dimensional model on the platform, wherein the support is connected to a support point corresponding to the three-dimensional model; and a processor for : Determining that a first end of a first support in the support is connected to the three-dimensional model or the platform, and when the first end of the first support in the support is connected to the When the three-dimensional model is used, it is determined that the first end of the first support is connected to the three-dimensional model with a first-type support tail, and the print head is controlled by the first end of the first support. The first type of support tail, wherein the first type of support tail includes a first sub-support tail and a second sub-support tail, and the second sub-support tail includes a first part and a second part. A sub-support tail is connected to the surface of the three-dimensional model and the direction of the first sub-support tail is the same as the normal vector of the surface of the three-dimensional model. The first end of the first part is connected to the first sub-support tail. A connection point makes the first part The clip feet of the first sub-support tail are at a first angle, the second end of the first part is connected to the first end of the second part, and the second end of the second part is connected to the The surface and the direction of the second part is the same as the normal vector of the surface of the solid model. The three-dimensional printing device according to item 4 of the scope of patent application, wherein the processor is further configured to: Determine that a first end of a second support in the support is connected to the three-dimensional model with the first type of support tail, and determine that the second sub-support tail in the first support is Whether the first part is connected to a connection point with the first part of the second sub-support tail in the second support, and when the first part of the second sub-support tail in the first support is connected with When the first part of the second sub-support tail in the second support is connected to the connection point, controlling the print head to print the second sub-support tail in the first support The second part of the first support, wherein the first end of the second part of the second sub-support tail in the first support is connected to the first part of the second sub-support tail in the first support and the The first portion of the second sub-support tail in the second support member, and the second end of the second portion of the second sub-support tail in the first support member is connected to the surface of the three-dimensional model. The three-dimensional printing device according to item 4 of the scope of patent application, wherein the voxels at which the first end of the first sub-support tail is located and the second end of the second part of the second sub-support tail Lying voxels lie on the same straight line.