KR20170025881A - calibration method according to shrinkage using a real-time update of the alignment mark - Google Patents

calibration method according to shrinkage using a real-time update of the alignment mark Download PDF

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Publication number
KR20170025881A
KR20170025881A KR1020150122959A KR20150122959A KR20170025881A KR 20170025881 A KR20170025881 A KR 20170025881A KR 1020150122959 A KR1020150122959 A KR 1020150122959A KR 20150122959 A KR20150122959 A KR 20150122959A KR 20170025881 A KR20170025881 A KR 20170025881A
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South Korea
Prior art keywords
laminate
shrinkage
original image
alignment mark
real
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KR1020150122959A
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Korean (ko)
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KR101754107B1 (en
Inventor
배익순
채승수
이상민
김장섭
배성민
배정윤
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주식회사 비엔에스
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    • B29C67/0088—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)

Abstract

The present invention relates to a correction method for shrinkage using real-time updating of an alignment mark, and more specifically, to a correction method for shrinkage using real-time updating of an alignment mark which can correct shrinkage and even when a plurality of laminates are shrunk during lamination, can reset (the correct) virtual coordinates altered by the shrinkage to thus allow the fine patterns to be laminated without defects. According to the present invention, the correction method comprises: an alignment mark storage step for storing from a pre-set original image, brightness values of pixel positions of the original image; a first lamination stage for laminating a first material on the basis of virtual coordinates associated with pre-set first modelling data to form a first laminate; a recognition stage for photographing in real-time the first laminate which is formed in the first lamination stage to continually update comparative images; and a calculation stage for performing calculations, by comparing the continuously-photographed comparative images in the recognition stage to the original image, to continually reset the virtual coordinates altered by shrinkage of the first laminate.

Description

[0001] The present invention relates to a calibration method using a real-time update of an alignment mark,

More particularly, the present invention relates to a method of compensating for shrinkage using a real-time update of an alignment mark, and more particularly, to a method of correcting shrinkage of a plurality of stacks, And a correction method according to contraction using real-time updating of an alignment mark for laminating a fine pattern.

Generally, cutting or injection molding is used to manufacture a product in a two-dimensional or three-dimensional form, and most of the small-sized production is dependent on the cutting process due to the cost of manufacturing an expensive mold.

On the other hand, there exist products which are difficult to manufacture due to the limitation of cutting using a tool, and they are manufactured by stacking products based on 3D modeling data inputted by the necessity to manufacture complex products more easily and quickly A 3D printer was developed.

Korean Patent No. 10-1407050 "3-D Printer Using Variable Water Tank Lamination < / RTI > Method and Molding Method Using the Same" as well as various methods for forming a laminate with more efficient and high quality Is being developed.

On the other hand, there is a problem that it is difficult to produce a precise product due to the problem that the laminate is shrunk by cooling in the process of forming the three-dimensional laminate.

Particularly, when two or more different materials are laminated to form one laminate, the degree of shrinkage of the respective materials is different, and thus there is a problem that the quality is very low as compared with the case of lamination using one material.

Particularly, when forming a fine pattern such as a circuit requiring high precision, a position to form a fine pattern is shifted by the contracted laminate, but regardless of forming a fine pattern along a predetermined path, Or there is a problem that the positional deviation is so severe that it can not be used.

Korean Patent No. 10-1407050 "Three-dimensional printer using variable water tank laminating method and molding method using the same"

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems and to provide a method of manufacturing a laminated body comprising two or more materials without defects due to shrinkage, And to provide a correction method.

Another object of the present invention is to provide a correction method according to shrinkage using real-time updating of an alignment mark for forming a fine pattern without defects due to shrinkage.

According to an aspect of the present invention, there is provided a method of compensating for shrinkage using a real-time update of an alignment mark according to the present invention includes storing an alignment mark storing a brightness value for each pixel position of an original image from a previously- A first laminating step for laminating a first material on the basis of virtual coordinate values in a form corresponding to the first modeling data to form a first laminate and a first laminating step for forming a first laminate formed by the first laminating step in real time And comparing the comparison image successively photographed by the recognition step with the original image to constantly reset the virtual coordinate values changed by the contraction of the first laminate And an arithmetic operation step of performing an arithmetic operation.

The calculating step compares the brightness value of each pixel position of the original image with the brightness value of each pixel position of the comparative image and compares the brightness value of each pixel position of the original image with the brightness value of the comparison image. The virtual coordinate value is reset.

If the brightness value of the comparison image and the original image match each other by 60% or more in the calculation step, the original image is replaced with the comparison image.

As described above, according to the correction method according to the contraction using the real-time update of the alignment mark according to the present invention, the imaginary coordinate values fluctuated by the contraction after stacking the materials are reset (corrected) It is possible to form a laminated body of two or more materials without defects with high quality.

According to the correction method according to the contraction using the real-time update of the alignment mark according to the present invention, it is possible to reset (correct) the imaginary coordinate value fluctuated by the contraction before forming the fine pattern, There is an effect that a pattern can be formed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing a first embodiment of a correction method according to contraction using real-time updating of an alignment mark according to the present invention in order; FIG.
FIG. 2 is a flowchart showing a second embodiment of a correction method according to contraction using real-time updating of an alignment mark according to the present invention.
3 is a view showing a first embodiment of a fine pattern laminating apparatus capable of correcting shrinkage according to the present invention.
4 is a view showing a second embodiment of a fine pattern laminating apparatus capable of correcting shrinkage according to the present invention.
5 is a view showing a recognition unit of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention.
6 or 7 is a view showing a laminate in which a lamination position is corrected by a fine pattern laminating apparatus capable of correcting shrinkage according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a flowchart showing a first embodiment of a correction method according to contraction according to the present invention, in real time, using real-time updating of an alignment mark. FIG. 2 is a view FIG. 3 is a view showing a first embodiment of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention, and FIG. 4 is a view showing a first embodiment of the micro pattern laminating apparatus according to the present invention, FIG. 5 is a view showing a recognition unit of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention, and FIG. 6 or FIG. 7 is a view showing a laminate in which a lamination position is corrected by a fine pattern laminator capable of correcting shrinkage according to the present invention.

FIG. 1 illustrates a first embodiment of a correction method according to contraction using real-time updating of an alignment mark according to the present invention. In the first embodiment, an alignment mark for storing a brightness value for each pixel position of an original image from a previously- A first stacking step S2 for stacking the first materials on the basis of virtual coordinate values corresponding to the first modeling data and storing the first modeling data to form a first stack, (S3) for sequentially photographing the first laminate formed by the lamination step (S2) and continuously updating the comparative images, and comparing the comparison image successively photographed by the recognition step (S3) with the original image And calculating (S4) a step of continuously resetting the imaginary coordinate value fluctuated by the contraction of the first laminate.

The calculation step S4 compares the brightness value of each pixel position of the original image with the brightness value of each pixel position of the comparative image and compares the brightness value of each pixel position of the original image with the brightness value of the comparison image, And reset the virtual coordinate value to the coordinate value.

In the calculation step S4, if the brightness values of the comparison image and the original image match each other by 60% or more, the original image may be replaced with the comparison image.

More specifically, the brightness value for each pixel position of the original image is stored from the original image input through the alignment mark storing step (S1). The brightness value for each pixel position of the original image is stored through the first laminating step (S2) The first material is laminated on the basis of virtual coordinate values in a form corresponding to the modeling data (first modeling data and second modeling data) for the product to form the first laminate.

The first modeling data is divided into a plurality of layers divided horizontally at a predetermined height, and then a plurality of stacked bodies corresponding to the respective layers from the lowest layer to the uppermost layer are repeatedly stacked to form a first stacked body .

In the recognition step S3, the first laminate formed by the first lamination step S2 is photographed in real time, and the comparative images are successively updated to the control unit. In the recognition step S3, The comparative image that is photographed and updated in the control unit is continuously compared with the original image through an operation step S4 to constantly reset the virtual coordinate values that are changed by the contraction of the first stack.

In addition, as shown in FIG. 2, a first laminating step (see FIG. 2) for forming a fine pattern preliminarily formed on the contracted first laminate on the basis of the imaginary coordinate values corrected through the calculating step (S4) S2.

In the first laminating step (S2), the second material is laminated on the first laminate in a form corresponding to the second modeling data based on the corrected coordinate values to form a second laminate of a fine pattern.

FIG. 3 illustrates a first embodiment of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention. In the micro pattern laminating apparatus according to the first embodiment of the present invention, A first laminate part (1) for forming a first laminate body (21) by lamination, and a first laminate body (21) formed by the first laminate part (1) A control unit 4 for comparing the image photographed by the recognizing unit 3 with the first modeling data to reset virtual coordinate values fluctuated by contraction, The second material is laminated in a form corresponding to the second modeling data of the fine pattern preliminarily inputted on the upper side of the first laminated body 21 contracted based on the virtual coordinate values corrected through the second laminate body 24 And a second lamination portion 2 for forming the second lamination portion.

Preferably, the second material includes a conductive material such as C, Cu, Au, Ag, or Pt so as to form a circuit of a fine pattern.

More specifically, the first laminated portion 1 receives a resin-based first material such as PLA, ABS, and acrylic from the first supply portion 30A and extrudes the first material onto the table 5 Thereby forming the first laminate 21.

At this time, the first stacking unit 1 is transferred to the X axis, the Y axis, and the Z axis by the transfer unit 32 under the control of the controller 4 to form the first stack body 21, (32) are well known and will not be described in detail.

An interval 1L between the first and second lamination portions 1 and 2 is preset in the control portion 4. When the first material is extruded through the first lamination portion 1, Axis direction, the second material is extruded by using the second layered portion 2 after the second layered portion 2 is further moved by 1L in the Y-axis direction.

The second laminated portion 2 is transferred in the Y-axis direction in consideration of the predetermined distance 1L between the first laminated portion 1 and the second laminated portion 2, The work can be performed based on the same coordinate axes at the position where the first lamination part 1 was located.

In addition, it may be configured to further include a hardening unit for hardening the first material by UV irradiation in the process of forming the first layered product 21 formed by laminating the first materials.

FIG. 4 illustrates a second embodiment of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention. In the first embodiment, A 1-1 layup section 11 for forming the 1-1 layup 22 by laminating the 1-1 material on the basis of the coordinate values, A 1-2 laminated portion 12 for forming the 1-2 laminated body 23 by laminating the 1-2 material on the basis of the virtual coordinate values corresponding to the modeling data, The first laminate 21 constituted by the first 1-1 laminate body 22 formed by the laminate portion 11 and the 1-2 first laminate body 23 formed by the 1-2 first laminate portion 12 is cooled A recognition unit 3 for photographing the first layered body 21 to obtain an image after being contracted and an image photographed by the recognition unit 3 are compared with first modeling data, A control unit 4 for resetting a virtual coordinate value changed by the control unit 4 and a control unit 4 for controlling the control unit 4, And a second stacking portion 2 for stacking the second material in a form corresponding to the second modeling data to form the second stack 24.

More specifically, the first 1-1 laminated portion 11 receives a first resin-based first material such as PLA, ABS and acrylic from the 1-1 supply portion 31A, -1 material is extruded to form a 1-1 laminate body 22 and the 1-2 laminate part 12 is formed of a resin material such as PLA, The first 1-2 material is extruded on the top of the first 1-1 laminate to form the 1-2 first laminate 23 to form the first 1-1 laminate 22 and the Thereby completing the first laminate 21 composed of the 1-2 laminate body 23.

That is, the first laminate 21 is formed by laminating a 1-1 laminate body 22 and a 1-2 laminate body 23 composed of a 1-1 material and a 1-2 material of different materials will be.

In addition, in the process of forming the first laminate 21 formed by laminating the first 1-1 material or the first 1-2 material, the first 1-1 material or the first 1-2 material is irradiated with UV to be hardened And a hardened portion 6 for forming a hardened portion.

The interval 1L between the first 1-1 lamination part 11 and the second lamination part 2 and the interval 1L between the first 1-1 lamination part 11 and the 1-2 first lamination part 12 Is set in the control section 4 and the first to second lamination section 12 is used to have the same coordinate value as that in the case of extruding the first-type material through the first- The second 1-2 material is extruded by using the 1-2 laminated portion 12 after the second-layer material is further transferred by 2L in the -Y-axis direction.

Further, in order to have the same coordinate value as that of extruding the 1-1 material through the 1-1 laminate portion 11 and extruding the 1-2 material through the 1-2 laminate portion 12, When using the second laminate portion 2, the second laminate portion 12 is further transferred by 1L + 2L in the direction of the Y axis when using the 1-2 laminate portion 12, and then the second material is extruded .

That is, the predetermined distance 1L between the first 1-1 lamination part 11 and the second lamination part 2 and the first 1-1 lamination part 11 and the 1-2 first lamination part 12 are spaced apart from each other The second 1-2 laminated portion 12 and the second laminated portion 2 are transferred in the Y axis direction in consideration of the predetermined distance 2L to form the 1-2 laminated portion 12 and the second laminated portion 2 Can perform work based on the same coordinate axes at the position where the first lamination part 1 was located.

FIG. 5 shows a recognition unit of a micro pattern laminating apparatus capable of correcting shrinkage according to the present invention. The first laminating unit 11 and the 1-2 first laminating unit 12 are used to form a first laminate The control unit 4 controls the recognition unit 3 to capture the first layered product 21 formed on the upper surface of the table 5 by using the transfer unit 32, 1 laminated portion 11, the 1-2 laminated portion 12, the second laminated portion 2, and the like.

The recognition unit 3 determines whether or not the table 5 is based on the modeling 21A of the first laminate of modeling data and the lamination position P1 of the second laminate as shown in (6-I) And then the first stacked body 21B is contracted and deformed as shown in (6-II).

The image of the first stacked body 21B deformed by the contraction is compared with the modeling 21A of the first stacked body by the control unit to determine the position P1 at which the second stacked body is stacked, To the position P2 considering the shrinkage of the first stack body 21B, and the control unit resets the imaginary coordinate value changed by the shrinkage.

Thereafter, the second lamination part forms a second laminate of the fine pattern at the corrected position P2 on the basis of the changed virtual coordinates under the control of the control part.

Accordingly, even if the first stack body 21B is deformed by shrinkage, the problem that the second stack body is stacked at a position deviating from a fixed position like P1 makes defects occur can be solved.

In order to prevent the second layered product of the fine pattern from being exposed to the outside and being broken, another laminated portion (a first laminated portion or a 1-1 laminated portion or a 1-2 laminated portion ) May be used to further laminate the first material, the 1-1 material, the 1-2 material, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: First lamination part
2: Second lamination part
3:
4:
5: Table
6:
11: 1-1 laminate part
12: 1-2 laminated part
21: First laminate
22: 1st 1-1 laminate
23: 1-2 laminate
24: second laminate
30:
32:

Claims (3)

An alignment mark storing step of storing a brightness value for each pixel position of an original image from a previously input original image;
A first laminating step of laminating a first material on the basis of a virtual coordinate value in a form corresponding to the input first modeling data to form a first laminate;
A recognition step of photographing a first laminate formed by the first lamination step in real time and successively updating a comparison image;
And an arithmetic step of continuously comparing the imaginary coordinate value fluctuated by the contraction of the first laminate by comparing the comparison image successively photographed by the recognition step with the original image,
Correction method according to shrinkage using real time update of alignment marks.
The method according to claim 1,
The calculation step compares the brightness value of each pixel position of the original image with the brightness value of each pixel position of the comparison image, and calculates a virtual value corresponding to the pixel position of the comparison image having the brightness value per pixel position, And resetting the coordinate value
Correction method according to shrinkage using real time update of alignment marks.
The method according to claim 1,
Wherein when the brightness values of the comparison image and the original image match each other by at least 60% in the calculating step, the original image is replaced with the comparison image
Correction method according to shrinkage using real time update of alignment marks.
KR1020150122959A 2015-08-31 2015-08-31 calibration method according to shrinkage using a real-time update of the alignment mark KR101754107B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113119458A (en) * 2019-12-31 2021-07-16 上海联泰科技股份有限公司 Calibration system and method of 3D printing equipment and 3D printing equipment

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Publication number Priority date Publication date Assignee Title
KR101407050B1 (en) 2013-11-07 2014-06-12 비즈텍코리아 주식회사 3D printer using variable vat layer laminate method

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US7706910B2 (en) * 2007-01-17 2010-04-27 3D Systems, Inc. Imager assembly and method for solid imaging
JP2015058678A (en) * 2013-09-20 2015-03-30 インターナショナル・ビジネス・マシーンズ・コーポレーションＩｎｔｅｒｎａｔｉｏｎａｌ Ｂｕｓｉｎｅｓｓ Ｍａｃｈｉｎｅｓ Ｃｏｒｐｏｒａｔｉｏｎ Method of making data for minimizing difference between dimension of three-dimensional structure formed by laser irradiation and design value of scan path of three-dimensional structure, computer for making data and computer program

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Publication number Priority date Publication date Assignee Title
KR101407050B1 (en) 2013-11-07 2014-06-12 비즈텍코리아 주식회사 3D printer using variable vat layer laminate method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113119458A (en) * 2019-12-31 2021-07-16 上海联泰科技股份有限公司 Calibration system and method of 3D printing equipment and 3D printing equipment
CN113119458B (en) * 2019-12-31 2022-08-09 上海联泰科技股份有限公司 Calibration system and method of 3D printing equipment and 3D printing equipment

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