KR20160132283A - Method for minimizing the bending phenomenon of 3D printing - Google Patents
Method for minimizing the bending phenomenon of 3D printing Download PDFInfo
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- KR20160132283A KR20160132283A KR1020150064725A KR20150064725A KR20160132283A KR 20160132283 A KR20160132283 A KR 20160132283A KR 1020150064725 A KR1020150064725 A KR 1020150064725A KR 20150064725 A KR20150064725 A KR 20150064725A KR 20160132283 A KR20160132283 A KR 20160132283A
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- B29C67/0051—
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- B29C67/0088—
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- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
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- 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
- B33Y80/00—Products made by additive manufacturing
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
Description
More particularly, the present invention relates to a method for minimizing the 3D printing warping phenomenon, and more particularly, to a method for minimizing the 3D printing warping phenomenon, And a method of minimizing the 3D printing warping phenomenon by reducing warpage by reducing the length (l) value of each section to obtain high quality output.
Generally, 3D printers produce products by stacking materials by moving nozzles in x, y, and z directions based on the drawing. Recently, 3D printer has been popularized and it is possible to output various products. Such a 3D printer is configured to receive drawings of various and complex kinds of products and to output them in a short time. These advantages are widely used not only in machinery but also in medical, construction, costume design, aerospace, and cooking.
These 3D printers have various types of output methods and materials. Typical examples are FDM (Fused Deposition Modeling) method in which ABS (acrylonitrile butadiene styrene) resin is melted and accumulated. In the 3D printer using the above method, the product is output at a high temperature and cooled in a short time. In this process, a warp phenomenon occurs depending on the size of the output and the state of the surrounding environment. In order to minimize the warping phenomenon, a method of keeping the temperature at a proper level and outputting is generally used.
Concretely, the warping phenomenon occurs mainly in a section where the output thickness is thick, the length is long, and the number of the heat changes is large. This phenomenon also occurs in injection molding. In this case, the bending phenomenon is alleviated by cleaning the surface of the mold, changing the gate position, increasing the injection pressure, and raising the resin temperature.
Also, it is possible to reduce the warping phenomenon by adjusting the starting point, increasing the floor adhesion, maintaining the room temperature and humidity, using the hot air fan, and maintaining the bed temperature after the output.
However, there is a disadvantage in that additional devices are required to maintain the optimum temperature of the furnace in such a manner to minimize the change in temperature during cooling, thereby increasing the design cost and thus lowering the economical efficiency.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a 3D printer capable of preventing a warping of an output, The present invention provides a method for minimizing the 3D printing warping phenomenon by reducing warpage by reducing the length (1) per section.
According to an aspect of the present invention, there is provided a 3D printer having at least one hole formed therein and outputting the output.
In one embodiment, the material of the output is characterized by being output by the FDM method of melting and laminating the ABS resin.
In one embodiment, the material, the strain is determined by ε = α (tt 0), the change is being determined is output by Δl = ε ㅧ l. Where ε is the strain, α is the thermal expansion coefficient, t is the current temperature, t 0 is the initial temperature, Δl is the strain, and length 1 is the length of the material.
In one embodiment, the output is characterized by dividing the section into a plurality of sections to reduce the length (l) for each section to relieve warpage.
According to the method of minimizing the 3D printing warping phenomenon of the present invention, when the warping is relaxed by reducing the length (l) value of each section by dividing the length of the material into several sections by making holes suitable for output through the 3D printer, It is possible not only to minimize warping due to the thermal effect but also to reduce the amount of material required for the output, thereby reducing the manufacturing cost, thereby reducing the weight of the product and preventing the roughness of the output surface. There is an effect that can be.
FIG. 1 is a view showing general output items output using a 3D printer.
FIG. 2 is a diagram of an output product designed to explain a 3D printing bending phenomenon minimizing method of the present invention.
FIG. 3 is a view showing an output output by the design of FIG. 2. FIG.
4 is a schematic diagram for explaining an experimental example of a 3D printing bending phenomenon minimization method of the present invention.
FIGS. 5 and 6 are diagrams for comparing 3D output produced by the design drawing of FIG. 4 and 3D output output by a general method.
For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.
Hereinafter, a method for minimizing the 3D printing warping phenomenon of the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.
Prior to the description, 3D printers have a variety of output methods and materials. In the 3D printing method, there are FDM which accumulates one layer of material, DLP (Digital light processing) which hardens the UV curable resin, and Selective laser sintering (SLS) which sinter the powder particles by laser.
In addition, the material of the 3D printer has a supporting material that forms the basic frame of the shape and a model material which becomes the material of the actual output, and PLA (poly lactic acid) resin and ABS resin are used as the model material. PLA resins are environmentally friendly and have good heat processability, but they are disadvantageous in that they are durable and expensive. ABS resin has three components of acrylonitrile, butadiene, and styrene. It is excellent in moldability and coloring, is good for processing, is strong against shocks and chemicals, and low in price. Therefore, in the present invention, 3D printing is performed by FDM method by melting ABS resin which is generally inexpensive and widely used.
The method of minimizing the 3D printing warping phenomenon according to the present invention is to minimize at least one or more holes in the output of the 3D printer to suppress the warping at the time of outputting the output.
On the other hand, it is preferable that the material is determined by the strain ε = α (tt 0 ), and the amount of change is determined and output by Δl = ε l. Ε is the strain, α is the thermal expansion coefficient, t is the current temperature, t 0 is the initial temperature, Δl is the strain, l is the length of the material.
In the case of the above strain, the thermal expansion coefficient of the ABS resin is 8.82 ㅧ 10 -5 m / m ℃. Therefore, since the thermal expansion coefficient is constant for each material, the strain is determined only by the temperature difference.
Also, in the case of the amount of change, as the length l increases, the amount of change increases, which causes warping. There are two ways to reduce this amount of variation: reduce the temperature difference of the strain and reduce the length.
However, as a method for reducing the temperature difference requires additional equipment, thereby increasing the unit price of the output, it is necessary to reduce the length l and to form one or more holes in the output. The output is divided into several sections, Thereby relieving the warpage of the output product.
Therefore, as shown in FIG. 1, it can be seen that warping occurs due to thermal action in the case of a general output without a hole. That is, the right side of the output is curved. That is, the 3D printer melts and accumulates material at a high temperature of 280 캜 at the time of output, and suddenly cools the room temperature of the printer up to 75 캜.
However, as shown in FIG. 2, when a hole is formed in the output product and the output is made to a 3D printer based on the design, it can be seen that there is no warping as shown in FIG.
In general, since the intended method does not have an intended hole, the length l is the total length of the output, and since the method of the present invention has a plurality of holes, (1). In addition, as the length (1) of each section is shortened, the warping phenomenon due to the thermal effect is remarkably alleviated, so that the unintentional warping phenomenon is reduced in the output as shown in FIG.
Hereinafter, the 3D printing will be described with reference to the embodiments and the conditions.
2 and 3, it was confirmed that warpage was reduced in 3D printing. However, in order to confirm the performance more clearly, the article as shown in FIG. 4 was designed. The volume of the article was a cubic shape having a size of 50 mm, 90 mm and 10 mm 3 , and the holes were formed with two uniform distances under the condition of the present invention. The size of the hole is 50 ㅧ 2 ㅧ 2mm 3 , which is the same.
5 and 6 are graphs showing the relationship between the output of the output of the present invention and the output of the upper portion as the output of the general method and the output of the lower portion of the output as the output of the present invention, to be.
On the other hand, as shown in FIG. 5, it is difficult to confirm the warping phenomenon on a flat surface. However, as shown in FIG. 6, it can be seen that the warping phenomenon is remarkably alleviated when viewed from the side.
When the result is measured using a digital vernier caliper as a measurement tool, the change amount? 50 of 50 mm width is 0.904 mm and the change amount? 90 of 90 mm is 1.627 mm.
In addition, when the edge portion of the output is most severely measured through the measuring tool, a distortion of 2.21 mm is generated in the case of a general output, whereas when a hole is formed in the output as in the present invention, And the warp phenomenon is remarkably reduced.
As described above, it can be seen that the use of the 3D printing method of the present invention effectively alleviates warpage of the output due to heat. In addition, when the 3D printing is performed in a conventional manner, the surface is warped due to warping.
However, in the 3D printing method of the present invention, the warping phenomenon is alleviated and the surface is not roughened, so that a high quality output can be obtained.
The embodiments of the method for minimizing the 3D printing bending phenomenon of the present invention described above are merely exemplary and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. . Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (4)
The material of the output may be,
And the ABS resin is melted and laminated.
Preferably,
The strain is determined by ε = α (tt 0 )
Wherein the change amount is determined and output by? 1 =? 1.
(Ε is the strain, α is the thermal expansion coefficient, t is the current temperature, t 0 is the initial temperature, Δl is the strain, l represents the length of the material)
Wherein the output is divided into a plurality of sections and one or more holes are formed for each section so as to alleviate warpage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102499333B1 (en) * | 2022-11-03 | 2023-02-13 | 주식회사 올소비트 | A orthodontic devices that are supported in close contact with the tooth surface |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140130133A (en) | 2012-02-21 | 2014-11-07 | 마이크로소프트 코포레이션 | Three-dimensional printing |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140130133A (en) | 2012-02-21 | 2014-11-07 | 마이크로소프트 코포레이션 | Three-dimensional printing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102499333B1 (en) * | 2022-11-03 | 2023-02-13 | 주식회사 올소비트 | A orthodontic devices that are supported in close contact with the tooth surface |
| KR102513046B1 (en) * | 2022-11-03 | 2023-03-23 | 주식회사 올소비트 | A orthodontic devices that are supported in close contact with the tooth surface |
| KR102513047B1 (en) * | 2022-11-03 | 2023-03-23 | 주식회사 올소비트 | A orthodontic devices that are supported in close contact with the tooth surface |
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