CN112961457A - 3D printing method - Google Patents
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- CN112961457A CN112961457A CN202110342386.4A CN202110342386A CN112961457A CN 112961457 A CN112961457 A CN 112961457A CN 202110342386 A CN202110342386 A CN 202110342386A CN 112961457 A CN112961457 A CN 112961457A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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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
- B33Y10/00—Processes of 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
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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
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Polymers & Plastics (AREA)
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Abstract
The invention provides a method for performing 3D printing by using a printing material containing PEEK, which comprises the following steps: step 1: mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use; step 2: printing the formed PEEK part green body by using a 3D printer; and step 3: removing a forming binder from the PEEK part green body; and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green body in an inert gas atmosphere to produce the target PEEK part product. According to the method, PEEK and a forming binder are mixed and then subjected to laser sintering, 3D printing forming is carried out to obtain a PEEK part green body, and then the part green body is subjected to forming binder heating removal and static pressure sintering treatment, so that a PEEK part product with excellent mechanical properties is produced.
Description
Technical Field
The invention relates to the technical field of 3D printing materials and methods, in particular to a 3D printing method.
Background
The PEEK is called poly-ether-ether-ketone in English, and the Chinese is called polyether ether ketone for short. PEEK is a semi-crystalline aromatic thermoplastic polymer material, which not only has the high temperature resistance, radiation resistance and stable chemical properties of thermosetting plastics, but also has excellent mechanical strength, such as high strength, high elastic modulus, high fracture toughness, and easy processability. Therefore, at present, a Polyetheretherketone (PEEK) material is widely used for a 3D printing material.
The 3D printing and molding technology, also known as additive manufacturing technology, can be generally divided into several methods such as photocuring molding technology, laser sintering manufacturing, fused deposition modeling, and the like, and is combined with CAD data in the 3D printing manufacturing process, so that processes such as mold manufacturing are eliminated, and the manufacturing cycle of products is greatly reduced.
Chinese patent publication No. CN108424605A discloses a polyetheretherketone 3D printing material and a 3D printing molding method thereof, wherein the polyetheretherketone 3D printing material comprises the following raw materials in parts by weight: 100 parts of polyether-ether-ketone, 10-100 parts of methylene bisacrylamide and 2-10 parts of polyetherimide. The patent utilizes the property that Polyetheretherketone (PEEK) can be dissolved in concentrated sulfuric acid to sulfonate the PEEK so as to combine with Methylene Bisacrylamide (MBA) to form PEEK-MBA, and the patent blends the PEEK-MBA with Polyetherimide (PEI) to melt and extrude, and the material components and the processing procedure are somewhat complicated.
How to provide a 3D printing method containing PEEK, which enables 3D printing to be operated easily, is a technical problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for 3D printing by using a printing material containing PEEK, which comprises the steps of mixing PEEK with a forming binder, then carrying out laser sintering, carrying out 3D printing and forming to obtain a PEEK part green compact, and then carrying out heating removal and static pressure sintering treatment on the forming binder on the part green compact to produce a PEEK part product with excellent mechanical properties.
In order to achieve the purpose, the invention provides the following technical scheme:
a 3D printing method, comprising the steps of:
(1) step 1: taking 70-90 parts of PEEK powder and 10-30 parts of forming binder according to the parts by weight, and mixing the PEEK powder and the forming binder together to obtain a 3D printing material for later use; in each part of the forming binder, the forming binder consists of 20-30% of paraffin and 70-80% of polyethylene in percentage by weight;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step 1 by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 180 ℃, and the temperature of a printing chamber is controlled below 70 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
(3) and step 3: in a special thermal desorption-sintering furnace, according to a heating desorption-sintering process curve, adopting inert gas for protection, and carrying out molding binder desorption treatment on the PEEK part green blank in the step 2;
(4) and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green blank without the forming binder in the step (3) in an inert gas atmosphere to produce a target PEEK part product.
When the 3D printing material is subjected to laser sintering, through controlling the sintering temperature and the printing chamber temperature, PEEK powder forms a process of melting-cooling solidification of a powder surface binder under the irradiation of laser spots, and is formed by stacking layer by layer; before printing, a three-dimensional PEEK part product model needing to be printed is designed in a computer by utilizing professional 3D printing software, 3D printing parameters are set, and 3D printing is carried out to form a PEEK part green body.
As further description of the technical scheme of the invention, in the step 1, 80 parts of PEEK powder and 20 parts of forming binder are taken according to the parts by weight and are mixed for standby; in each part of the forming binder, the forming binder consists of 25 percent of paraffin and 75 percent of polyethylene in percentage by weight.
In the 3D printing material containing PEEK, through the optimized components in parts by weight and weight percentage, PEEK powder and a molding binder taking paraffin and polyethylene as main bodies are mixed together to serve as a raw material for 3D printing molding, the raw materials of the components are simple, and the raw materials can be used in a 3D printing molding process without redundant process treatment.
As a further description of the technical solution of the present invention, the heating removal-sintering process curve of step 3 is: firstly, heating to 200 ℃ at the speed of 2 ℃/min to remove the forming binder, and preserving heat for 180min to ensure complete removal; and then continuously heating to the preset temperature of 350-.
In the process of heating removal-high temperature static pressure sintering, the removal of the forming binder is ensured to be clean by controlling the temperature rise rate, the PEEK part green compact is not deformed, and the subsequent PEEK part green compact is also subjected to high temperature sintering according to a preset temperature rise program.
As a further description of the technical solution of the present invention, the protection with inert gas is performed throughout the whole process of heating, removing and sintering.
As a further description of the technical solution of the present invention, the inert gas is one of argon or nitrogen.
During sintering, inert gas of argon or nitrogen is used for protection, so that oxidation of the material can be protected.
Based on the technical scheme, the invention has the following technical effects:
(1) according to the 3D printing method provided by the invention, after the 3D printing material taking the PEEK powder as the main raw material is subjected to laser sintering, the forming binder is removed by heating, the hot isostatic pressing sintering technology is adopted, the strength and the forming consistency of the material can be further improved through the hot pressing sintering process, and the printed PEEK part has excellent mechanical properties.
(2) The 3D printing method provided by the invention has the advantages of simple printing process and easiness in operation, and can solve the problems of high cost and complex equipment maintenance of the conventional 3D printing material.
Drawings
Fig. 1 is a graph of a thermal desorption-sintering process in a 3D printing method of the present invention.
FIG. 2 is a microstructure of the sintered support structure of the PEEK part of the present invention.
FIG. 3 is a cross-sectional profile of the sintered support structure of the PEEK part of the present invention.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
A 3D printing method, comprising the steps of:
(1) step 1: taking 80 parts of PEEK powder and 20 parts of forming adhesive according to the parts by weight, wherein each part of forming adhesive consists of 25 percent of paraffin and 75 percent of polyethylene according to the weight percentage; mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step (1) by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 180 ℃, and the temperature of a printing chamber is controlled below 70 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
(3) and step 3: in a special thermal desorption-sintering furnace, according to a heating desorption-sintering process curve, argon is adopted for protection, and the green blank of the PEEK part obtained in the step 2 is subjected to forming binder desorption treatment;
(4) and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green blank without the forming binder in the step (3) in the atmosphere of inert gas of argon to produce a target PEEK part product.
Wherein, the heating removal-sintering process curve of the step 3 is as follows: firstly, heating to 200 ℃ at the speed of 2 ℃/min to remove the forming binder, and preserving heat for 180min to ensure complete removal; and then continuously heating to the preset temperature of 350 ℃ at the speed of 2 ℃/min for hot-pressing sintering, preserving heat for 100min, and then slowly cooling along with a furnace to finish the removal of the forming binder and the high-temperature sintering of the PEEK part green body. The programmed temperature process of heating, removing and sintering is shown in the graph of the heating, removing and sintering process of figure 1.
Fig. 2 is a microstructure of the sintered support structure of the PEEK component in this embodiment, and it can be seen from fig. 2 that the sintered material has good density and no obvious holes or cracks.
Fig. 3 is a cross-sectional profile of the sintered support structure of the PEEK component in this embodiment, as shown in fig. 3, the cross section of the material is very smooth, and there are no obvious dimple and plastic stretching signs, and it can be seen that the material is brittle fracture, the material strength is high, and the mechanical properties are good.
Therefore, by adopting the 3D printing method containing the PEEK printing material, the 3D printing material taking the PEEK powder as the main raw material is subjected to laser sintering, the forming binder is removed by heating, the hot isostatic pressing sintering technology is adopted, the strength and the forming consistency of the material can be further improved through the hot pressing sintering process, and the printed PEEK part has excellent mechanical properties.
Example 2
A 3D printing method, comprising the steps of:
(1) step 1: taking 70 parts of PEEK powder and 30 parts of forming adhesive according to the parts by weight, wherein each part of forming adhesive consists of 30 percent of paraffin and 70 percent of polyethylene according to the weight percentage; mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step 1 by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 185 ℃, and the temperature of a printing chamber is controlled below 75 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
(3) and step 3: in a special thermal desorption-sintering furnace, according to a heating desorption-sintering process curve, argon is adopted for protection, and the green blank of the PEEK part obtained in the step 2 is subjected to forming binder desorption treatment;
(4) and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green blank without the forming binder in the step (3) in the atmosphere of inert gas of argon to produce a target PEEK part product.
Wherein, the heating removal-sintering process curve of the step 3 is as follows: firstly, heating to 200 ℃ at the speed of 2 ℃/min to remove the forming binder, and preserving heat for 180min to ensure complete removal; and then continuously heating to the preset temperature of 400 ℃ at the speed of 2 ℃/min for hot-pressing sintering, preserving heat for 100min, and then slowly cooling along with a furnace to finish the removal of the forming binder and the high-temperature sintering of the PEEK part green body.
Therefore, by adopting the 3D printing method containing the PEEK printing material of the embodiment, the forming binder is removed by heating after the 3D printing material is subjected to laser sintering, the hot isostatic pressing sintering technology is adopted, the strength and the forming consistency of the material can be further improved through the hot pressing sintering process, and the printed PEEK part has excellent mechanical properties.
Example 3
A 3D printing method, comprising the steps of:
(1) step 1: taking 90 parts of PEEK powder and 10 parts of forming adhesive according to the parts by weight, wherein each part of forming adhesive consists of 20 percent of paraffin and 80 percent of polyethylene according to the weight percentage; mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step (1) by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 180 ℃, and the temperature of a printing chamber is controlled below 70 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
(3) and step 3: in a special thermal desorption-sintering furnace, according to a heating desorption-sintering process curve, argon is adopted for protection, and the green blank of the PEEK part obtained in the step 2 is subjected to forming binder desorption treatment;
(4) and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green blank without the forming binder in the step (3) in the atmosphere of inert gas of argon to produce a target PEEK part product.
Wherein, the heating removal-sintering process curve of the step 3 is as follows: firstly, heating to 200 ℃ at the speed of 2 ℃/min to remove the forming binder, and preserving heat for 180min to ensure complete removal; and then continuously heating to a preset temperature of 380 ℃ at the speed of 2 ℃/min for hot-pressing sintering, preserving heat for 110min, and then slowly cooling along with a furnace to finish the removal of the forming binder and the high-temperature sintering of the PEEK part green body, thereby producing the target PEEK part product.
By adopting the 3D printing method containing the PEEK printing material, the PEEK parts obtained by printing have excellent mechanical properties.
Example 4
A 3D printing method, comprising the steps of:
(1) step 1: according to the weight portion, 75 portions of PEEK powder and 25 portions of forming binding agent are taken, and each portion of forming binding agent consists of 30 percent of paraffin and 70 percent of polyethylene according to the weight percentage; mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use;
the laser sintering of step 2, and the removal of the binder for molding and the sintering at high temperature and static pressure of step 3 and step 4 were carried out in the same manner as in example 1 except that the inert gas was nitrogen.
Comparative example 1 (No paraffin wax in Binder)
A3D printing material containing PEEK comprises the following components in parts by weight: 80 parts of PEEK powder and 20 parts of molding adhesive polyethylene.
The 3D printing material containing PEEK is used in a 3D printing method, and the 3D printing method specifically comprises the following steps.
(1) Step 1: according to the weight parts of the components, the PEEK powder and the forming binder are mixed together to obtain the 3D printing material for later use.
(2) The operations of step 2, step 3 and step 4 were the same as in example 1.
Because the forming binder in the 3D printing material is lack of paraffin, the PEEK part green body has poor formability during 3D printing, and an ideal target green body cannot be obtained.
COMPARATIVE EXAMPLE 2 (without inert gas)
A 3D printing method, comprising the steps of:
(1) step 1: taking 80 parts of PEEK powder and 20 parts of forming adhesive according to the parts by weight, wherein each part of forming adhesive consists of 25 percent of paraffin and 75 percent of polyethylene according to the weight percentage; mixing PEEK powder and a forming binder together to obtain a 3D printing material for later use;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step (1) by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 180 ℃, and the temperature of a printing chamber is controlled below 70 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
the binder removal and hot isostatic pressing operations of step 3 and step 4 of comparative example 2 were the same as those of example 1 except that no inert gas was used for protection.
In the 3D printing method, the PEEK part green body is not protected by inert gas during high-temperature sintering, so that the surface of the PEEK part product obtained by production is uneven.
The PEEK part products of examples 1 to 4 and the PEEK part products of comparative examples 1 and 2 were subjected to product performance tests, and the test results are summarized in table 1, examples 1 to 4, and comparative examples 1 to 2.
TABLE 1 summary of PEEK parts Performance test data of examples 1 to 4 and comparative examples 1 to 2
| Examples | Stretchingstrength/MPa | Elongation at break/% |
| Example 1 | 78.65 | 7.5 |
| Example 2 | 72.51 | 6.8 |
| Example 3 | 81.13 | 7.9 |
| Example 4 | 74.66 | 7.2 |
| Comparative example 1 | Is not formed | Is not formed |
| Comparative example 2 | 64.56 | 4.6 |
As can be seen from table 1, after the 3D printing method of examples 1 to 4 is used to perform laser sintering on the 3D printing material using PEEK powder as a main raw material, the printed PEEK parts have excellent tensile strength and elongation at break, and excellent mechanical properties; in contrast, comparative example 1 cannot be molded since paraffin was not used in the binder; comparative example 2 was not protected with inert gas, and the tensile strength and elongation at break of the PEEK part prepared by the method were smaller than those of the PEEK part prepared by the inert gas protection.
The foregoing is merely exemplary and illustrative of the structures of the present invention, which are described in some detail and detail, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (5)
1. A3D printing method is characterized by comprising the following steps:
(1) step 1: taking 70-90 parts of PEEK powder and 10-30 parts of forming binder according to the parts by weight, and mixing the PEEK powder and the forming binder together to obtain a 3D printing material for later use; in each part of the forming binder, the forming binder consists of 20-30% of paraffin and 70-80% of polyethylene in percentage by weight;
(2) step 2: performing laser sintering on the 3D printing material obtained in the step 1 by adopting a 3D printer, wherein the temperature of the laser sintering is controlled below 180 ℃, and the temperature of a printing chamber is controlled below 70 ℃; setting 3D printing parameters according to a designed three-dimensional PEEK part product model to be printed, and 3D printing and forming a PEEK part green body;
(3) and step 3: in a special thermal desorption-sintering furnace, according to a heating desorption-sintering process curve, adopting inert gas for protection, and carrying out molding binder desorption treatment on the PEEK part green blank in the step 2;
(4) and 4, step 4: and (3) carrying out high-temperature static pressure sintering on the PEEK part green blank without the forming binder in the step (3) in an inert gas atmosphere to produce a target PEEK part product.
2. The 3D printing method according to claim 1, wherein in step 1, 80 parts of PEEK powder and 20 parts of molding adhesive are taken and mixed for standby; in each part of the forming binder, the forming binder consists of 25 percent of paraffin and 75 percent of polyethylene in percentage by weight.
3. The 3D printing method according to claim 1, wherein the heating removal-sintering process curve of step 3 is: firstly, heating to 200 ℃ at the speed of 2 ℃/min to remove the forming binder, and preserving heat for 180min to ensure complete removal; and then continuously heating to the preset temperature of 350-.
4. The 3D printing method according to claim 1, wherein the protection with inert gas is performed throughout the entire process of heating, de-sintering.
5. The 3D printing method according to claim 4, wherein the inert gas is one of argon or nitrogen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392699.6A CN111518363A (en) | 2020-05-11 | 2020-05-11 | PEEK-containing 3D printing material and 3D printing method thereof |
| CN2020103926996 | 2020-05-11 |
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| CN112961457A true CN112961457A (en) | 2021-06-15 |
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| CN202110342386.4A Withdrawn CN112961457A (en) | 2020-05-11 | 2021-03-30 | 3D printing method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769586A (en) * | 2013-11-26 | 2014-05-07 | 王利民 | Metal 3D printing product production method by means of low-power laser sintering |
| JP5819503B1 (en) * | 2014-10-21 | 2015-11-24 | 冨士ダイス株式会社 | Method for manufacturing lost wax mold for powder metallurgy that is layered with 3D printer |
| CN107098715A (en) * | 2017-04-26 | 2017-08-29 | 西安交通大学 | A kind of ceramic part 3D printing method based on dual UV curable paint bonding agent |
| CN107521118A (en) * | 2017-08-10 | 2017-12-29 | 东莞远铸智能科技有限公司 | A kind of preparation method of 3D printing workpiece |
| CN107649684A (en) * | 2017-10-31 | 2018-02-02 | 陕西爱骨医疗股份有限公司 | A kind of 3D printing method |
-
2020
- 2020-05-11 CN CN202010392699.6A patent/CN111518363A/en active Pending
-
2021
- 2021-03-30 CN CN202110342386.4A patent/CN112961457A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769586A (en) * | 2013-11-26 | 2014-05-07 | 王利民 | Metal 3D printing product production method by means of low-power laser sintering |
| JP5819503B1 (en) * | 2014-10-21 | 2015-11-24 | 冨士ダイス株式会社 | Method for manufacturing lost wax mold for powder metallurgy that is layered with 3D printer |
| CN107098715A (en) * | 2017-04-26 | 2017-08-29 | 西安交通大学 | A kind of ceramic part 3D printing method based on dual UV curable paint bonding agent |
| CN107521118A (en) * | 2017-08-10 | 2017-12-29 | 东莞远铸智能科技有限公司 | A kind of preparation method of 3D printing workpiece |
| CN107649684A (en) * | 2017-10-31 | 2018-02-02 | 陕西爱骨医疗股份有限公司 | A kind of 3D printing method |
Non-Patent Citations (1)
| Title |
|---|
| 中国汽车工程学会，3D科学谷编著: "《3D打印与汽车行业技术发展报告》", 30 September 2017, 北京理工大学出版社 * |
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