CN107417299B - A post-treatment process for 3D printed gypsum products - Google Patents
A post-treatment process for 3D printed gypsum products Download PDFInfo
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 42
- 239000010440 gypsum Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 21
- 238000010146 3D printing Methods 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 230000036571 hydration Effects 0.000 claims description 3
- 238000006703 hydration reaction Methods 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 abstract description 22
- 239000000243 solution Substances 0.000 description 14
- 238000007639 printing Methods 0.000 description 8
- 239000011505 plaster Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 3
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5009—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing nitrogen in the anion, e.g. nitrites
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5011—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing halogen in the anion
- C04B41/5012—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing halogen in the anion chlorides
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5014—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing sulfur in the anion, e.g. sulfides
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Abstract
本发明涉及一种3D打印石膏制品的后处理工艺，将粘结剂喷射3D打印成型的石膏制品，通过溶液浸渍固化、微波快速干燥等工艺，获得的成品的强度较传统干燥处理工艺提高一倍以上，后处理时间也大幅度降低，解决了现有工艺中3D打印石膏力学性能差、后处理成本高、干燥时间长等问题。本发明的处理工艺，提高了3D打印石膏的力学性能，降低了后处理成本，缩短了后处理时间。
The invention relates to a post-processing process of 3D printed gypsum products. The gypsum products formed by jetting 3D printing with binders are impregnated and solidified by solution, microwave rapid drying and other processes, and the strength of the obtained finished products is doubled compared with the traditional drying process. Above, the post-processing time is also greatly reduced, which solves the problems of poor mechanical properties of 3D printing gypsum, high post-processing cost, and long drying time in the existing process. The treatment process of the present invention improves the mechanical properties of the 3D printed gypsum, reduces post-processing costs, and shortens post-processing time.
Description
技术领域technical field
本发明涉及3D打印技术领域，特别涉及一种以粘结剂喷射成型(3DP)的3D打印石膏制品的后处理工艺。The invention relates to the technical field of 3D printing, in particular to a post-treatment process of 3D printed gypsum products formed by binder jetting (3DP).
背景技术Background technique
3D打印技术(又称增材制造技术)是一种以材料累加为基本特征，以直接制造零部件为目标，具有广阔发展前景的快速制造技术，被誉为制造业的一场革命。以粘结剂喷射3D打印工艺打印的石膏制品由于能够实现全彩打印，是模型、模具打印的最主要工艺。目前，传统的粘结剂喷射3D打印石膏工艺主要包括，制品打印、烘干和固化剂喷涂等工序。该工艺主要存在三个问题，一是，由于打印过程喷射的粘结剂中含水量很低，导致3D打印石膏粉中的半水石膏仅能部分水化，石膏打印制品的结构主要依靠粘结剂的粘结来维持，力学性能低，不到5MPa，极易破碎；二是，目前，石膏3D打印系统烘干工艺采用的是发热管烘烤或鼓热风来进行干燥，不仅烘干效率低并且烘干厚壁打印制品时容易发生开裂；三是，为了提高烘干后制品的力学性能，会在制品表面涂抹一层高分子固化剂。一般固化剂的价格超过1000元/L，大幅度增加了3D打印石膏制品的成本。并且，固化剂仅增强了制品的表面力学性能，制品内部强度依然很低。3D printing technology (also known as additive manufacturing technology) is a rapid manufacturing technology with broad development prospects, which is based on material accumulation and aims to directly manufacture parts. It is known as a revolution in the manufacturing industry. Gypsum products printed by binder jet 3D printing process are the most important process for model and mold printing because they can realize full-color printing. At present, the traditional binder jetting 3D printing gypsum process mainly includes the processes of product printing, drying and curing agent spraying. There are three main problems in this process. First, because the water content in the binder sprayed during the printing process is very low, the hemihydrate gypsum in the 3D printing gypsum powder can only be partially hydrated, and the structure of the gypsum printed product mainly depends on the bonding. The bonding of the gypsum 3D printing system is maintained, the mechanical properties are low, less than 5MPa, and it is easily broken; second, at present, the drying process of the gypsum 3D printing system uses a heating tube to bake or blow hot air to dry, which not only has low drying efficiency And it is easy to crack when drying thick-walled printed products; third, in order to improve the mechanical properties of the dried product, a layer of polymer curing agent will be applied on the surface of the product. The price of general curing agent exceeds 1,000 yuan/L, which greatly increases the cost of 3D printing plaster products. Moreover, the curing agent only enhances the surface mechanical properties of the product, and the internal strength of the product is still very low.
以上问题，严重制约了石膏3D打印工艺的推广应用。The above problems have seriously restricted the popularization and application of gypsum 3D printing technology.
发明内容Contents of the invention
本发明所要解决的技术问题是提供一种3D打印石膏制品的高效后处理工艺，以提高3D打印石膏制品的力学性能，缩短后处理时间，降低后处理成本。The technical problem to be solved by the present invention is to provide an efficient post-processing process for 3D printed gypsum products, so as to improve the mechanical properties of 3D printed gypsum products, shorten post-processing time, and reduce post-processing costs.
为实现上述目的，本发明提供以下的技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种3D打印石膏制品的后处理工艺，将粘结剂喷射3D打印成型的石膏制品浸泡于促水化溶液5-30分钟，取出后放入微波干燥箱进行干燥，即得成品。A post-treatment process for 3D printed gypsum products. The gypsum products formed by binder jetting 3D printing are soaked in a hydration-promoting solution for 5-30 minutes, taken out and put into a microwave oven for drying to obtain finished products.
进一步，所述促水化溶液为氯化钙、硝酸钙、硫酸钠、硫酸铝、硫酸镁等含有大量Ca2+或SO4 2-的溶液的一种，Ca2+或SO4 2-浓度≥0.2mol/L。Further, the hydration promoting solution is one of calcium chloride, calcium nitrate, sodium sulfate, aluminum sulfate, magnesium sulfate and other solutions containing a large amount of Ca 2+ or SO 4 2- , and the concentration of Ca 2+ or SO 4 2- ≥0.2mol/L.
进一步，所述微波干燥箱的设置温度为60-110℃。Further, the set temperature of the microwave oven is 60-110°C.
采用以上技术方案的有益效果是：本发明一种3D打印石膏制品后处理工艺，主要通过两个方面提高了3D打印石膏的力学性能，降低后处理成本，缩短处理时间。一是，通过将3D打印制品在含有高浓度Ca2+或SO4 2-的促水化溶液中浸渍一段时间，3D打印制品在与溶液接触的过程中，制品中未水化的半水石膏粉体材料在高浓度Ca2+或SO4 2-的作用下，产生很大的过饱和度，能够促使二水硫酸钙晶体的快速成核和生长，从而使得打印制品中大部分未水化的半水石膏快速水化，水化形成大量二水石膏晶体之间相互交错并且填充于制品的空隙，形成一个稳定、致密的微观结构(见图2)，使得制品力学性能大幅度增加；二是，微波加热干燥方式，能够实现厚壁、复杂结构3D打印石膏制品的均匀、快速干燥，大幅度缩短打印周期。并且，石膏孔隙中硫酸钙饱和溶液中水分的快速蒸发，溶液中硫酸钙浓度快速提高，形成极大的过饱和度，又促进了二水石膏晶体数量的增加和生长速率的提高，有利于制品力学性能的提升。The beneficial effects of adopting the above technical solutions are: a post-treatment process for 3D printed gypsum products in the present invention, which mainly improves the mechanical properties of 3D printed gypsum through two aspects, reduces post-processing costs, and shortens processing time. One is, by immersing the 3D printed product in a hydration-promoting solution containing a high concentration of Ca 2+ or SO 4 2- for a period of time, the unhydrated hemihydrate gypsum in the 3D printed product will Under the action of high concentration Ca 2+ or SO 4 2- , the powder material produces a large degree of supersaturation, which can promote the rapid nucleation and growth of calcium sulfate dihydrate crystals, so that most of the printed products are not hydrated The hemihydrate gypsum is rapidly hydrated, and the hydration forms a large number of dihydrate gypsum crystals interlaced and filled in the gaps of the product, forming a stable and dense microstructure (see Figure 2), which greatly increases the mechanical properties of the product; Yes, the microwave heating and drying method can achieve uniform and rapid drying of thick-walled and complex-structured 3D printed plaster products, and greatly shorten the printing cycle. Moreover, the rapid evaporation of water in the saturated solution of calcium sulfate in the pores of gypsum increases the concentration of calcium sulfate in the solution rapidly, forming a great supersaturation, and promoting the increase in the number of dihydrate gypsum crystals and the increase in growth rate, which is beneficial to the product Improvement of mechanical properties.
附图说明Description of drawings
图1为实施例1制品打印后直接鼓风干燥获得的3D打印石膏制品的扫描电镜图；Fig. 1 is the scanning electron micrograph of the 3D printing gypsum product obtained directly after the printing of the product in Example 1;
图2为实施例1制品打印后经过浸泡处理并以微波干燥获得的3D打印石膏制品的扫描电镜图。Fig. 2 is a scanning electron micrograph of the 3D printed gypsum product obtained by immersion treatment and microwave drying after the product of Example 1 is printed.
具体实施方式Detailed ways
下面结合附图和实施例详细说明本发明的技术方案。The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.
实施例1Example 1
将以粘结剂喷射3D打印工艺成型的3D打印石膏制品，浸泡于3mol/L的氯化钙溶液5分钟，取出后，以80℃微波快速干燥10分钟，得到处理后的3D打印石膏制品。The 3D printed gypsum product formed by the binder jet 3D printing process was soaked in a 3mol/L calcium chloride solution for 5 minutes, and after taking it out, it was quickly dried by microwave at 80°C for 10 minutes to obtain the treated 3D printed gypsum product.
图1为制品打印后直接鼓风干燥3小时获得的3D打印石膏制品的扫描电镜图，干燥温度80℃左右；图2为溶液浸泡处理并以微波干燥获得的3D打印石膏制品的扫描电镜图。由图1和图2可以看出，经过溶液浸渍处理和微波干燥的制品结构密实，孔隙率明显降低。Figure 1 is the scanning electron microscope image of the 3D printed gypsum product obtained by directly blasting and drying the product for 3 hours at a drying temperature of about 80°C; Figure 2 is the scanning electron microscope image of the 3D printed gypsum product obtained by soaking in the solution and drying it by microwave. It can be seen from Figure 1 and Figure 2 that the product structure after solution impregnation treatment and microwave drying is dense, and the porosity is obviously reduced.
传统后处理获得的3D打印石膏制品的抗压强度为4.7MPa，采用实施例1的方法处理后的3D打印石膏制品的抗压强度为11.7MPa。后处理时间由原来的3小时缩短为15分钟，效率大幅度提升。The compressive strength of the 3D printed gypsum product obtained by traditional post-treatment is 4.7 MPa, and the compressive strength of the 3D printed gypsum product processed by the method of Example 1 is 11.7 MPa. The post-processing time is shortened from the original 3 hours to 15 minutes, and the efficiency is greatly improved.
实施例2Example 2
将以粘结剂喷射3D打印工艺成型的3D打印石膏制品，浸泡于浓度为2.5mol/L的硝酸钙溶液10分钟后，取出以100℃微波快速干燥5分钟，获得抗压强度为10.2MPa的3D打印石膏制品。后处理时间缩短为15分钟。传统后处理获得的3D打印石膏制品的抗压强度为4.7Mpa，后处理时间为3小时(干燥温度80℃)。The 3D printed gypsum product formed by the binder jet 3D printing process was immersed in a calcium nitrate solution with a concentration of 2.5mol/L for 10 minutes, and then it was taken out and dried by microwave at 100°C for 5 minutes to obtain a gypsum product with a compressive strength of 10.2MPa. 3D printed plaster products. The post-processing time was reduced to 15 minutes. The compressive strength of the 3D printed gypsum products obtained by traditional post-processing is 4.7Mpa, and the post-processing time is 3 hours (drying temperature 80°C).
实施例3Example 3
将以粘结剂喷射3D打印工艺成型的3D打印石膏制品，浸泡于浓度为1.0mol/L的硫酸钠溶液25分钟，取出后，以60℃微波快速干燥30分钟，获得抗压强度为9.9MPa的3D打印石膏制品，后处理时间缩短为55分钟。传统后处理获得的3D打印石膏制品的抗压强度为4.7Mpa，后处理时间为3小时(干燥温度80℃)。The 3D printed gypsum product formed by the binder jetting 3D printing process was soaked in a sodium sulfate solution with a concentration of 1.0mol/L for 25 minutes. After taking it out, it was quickly dried at 60°C for 30 minutes to obtain a compressive strength of 9.9MPa. 3D printed plaster products, the post-processing time is shortened to 55 minutes. The compressive strength of the 3D printed gypsum products obtained by traditional post-processing is 4.7Mpa, and the post-processing time is 3 hours (drying temperature 80°C).
实施例4Example 4
将以粘结剂喷射3D打印工艺成型的3D打印石膏制品，浸泡于0.5mol/L的硫酸铝溶液15分钟，取出后，以110℃微波快速干燥5分钟，获得抗压强度为10.9MPa的3D打印石膏制品，后处理时间缩短为20分钟。传统后处理获得的3D打印石膏制品的抗压强度为4.7Mpa，后处理时间为3小时(干燥温度80℃)。The 3D printed gypsum products formed by the binder jet 3D printing process were soaked in 0.5mol/L aluminum sulfate solution for 15 minutes. For printing plaster products, the post-processing time is shortened to 20 minutes. The compressive strength of the 3D printed gypsum products obtained by traditional post-processing is 4.7Mpa, and the post-processing time is 3 hours (drying temperature 80°C).
实施例5Example 5
将以粘结剂喷射3D打印工艺成型的3D打印石膏制品，浸泡于浓度为0.2mol/L的硫酸镁溶液30分钟后，取出以80℃微波快速干燥10分钟，获得抗压强度8.3MPa的3D打印石膏制品，后处理时间缩短为40分钟。传统后处理获得的3D打印石膏制品的抗压强度为4.7Mpa，后处理时间为3小时(干燥温度80℃)。The 3D printed gypsum product formed by the binder jet 3D printing process was soaked in a magnesium sulfate solution with a concentration of 0.2mol/L for 30 minutes, and then it was taken out and dried by microwave at 80°C for 10 minutes to obtain a 3D plaster product with a compressive strength of 8.3MPa. For printing plaster products, the post-processing time is shortened to 40 minutes. The compressive strength of the 3D printed gypsum products obtained by traditional post-processing is 4.7Mpa, and the post-processing time is 3 hours (drying temperature 80°C).
以上所述仅是本发明的优选实施方式，应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。The above are only preferred embodiments of the present invention, and it should be pointed out that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all belong to the present invention. scope of protection.
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| CN103707388A (en) * | 2013-12-23 | 2014-04-09 | 宁波市鄞州润物工业设计有限公司 | Three-dimensional printing method |
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