CN114210944A - Composite 3D printing preparation method of casting sand mold with chilling block and casting sand mold - Google Patents
Composite 3D printing preparation method of casting sand mold with chilling block and casting sand mold Download PDFInfo
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- CN114210944A CN114210944A CN202111429721.0A CN202111429721A CN114210944A CN 114210944 A CN114210944 A CN 114210944A CN 202111429721 A CN202111429721 A CN 202111429721A CN 114210944 A CN114210944 A CN 114210944A
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- 238000010146 3D printing Methods 0.000 title claims abstract description 133
- 239000004576 sand Substances 0.000 title claims abstract description 130
- 238000005266 casting Methods 0.000 title claims abstract description 90
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 12
- 229920001187 thermosetting polymer Polymers 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- 239000007849 furan resin Substances 0.000 claims description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 244000137852 Petrea volubilis Species 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 94
- 238000009434 installation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- 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
-
- 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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses a composite 3D printing preparation method of a casting sand mold with a chiller and the casting sand mold, aiming at solving the problems of inconvenience in mounting the chiller and high cost in the existing 3D printing sand mold casting mold in the prior art. The method comprises the following steps: manufacturing a 3D printing sand mold according to a product drawing by adopting a 3D printing process; manufacturing a 3D printing wire shell mold according to the same product drawing by adopting a wire 3D printing process, wherein the 3D printing wire shell mold is matched with the 3D printing sand mold; assembling the 3D printing sand mold and the 3D printing wire shell mold, wherein a cold iron cavity is formed in a gap between the 3D printing sand mold and the 3D printing wire shell mold; adding a chromite sand mixture into the chill cavity, and compacting and solidifying the chromite sand mixture to form a chill; and removing the 3D printing wire shell mold, and treating to obtain the casting sand mold with the chilling block. The method can arrange the chilling blocks at any positions and in any shapes, reduce the manufacturing cost and expand the application range of the 3D printing sand mold.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a composite 3D printing preparation method of a casting sand mold with a chilling block and the casting sand mold.
Background
With the popularization and application of 3D printing technology, the current method for casting and producing by using a 3D printing sand mold is gradually popular in the industry. The method for producing the sand mold through 3D printing can replace the traditional wood mold model molding process, the obtained sand mold has the compression strength which is twice as high as that of the wood mold sand mold, meanwhile, various complex sand mold structures can be directly printed and formed, and the method has extremely high formability.
When the casting is cooled and solidified in the 3D printing sand casting model, the finally solidified part is also easy to have the defects of shrinkage porosity, shrinkage cavity and the like, and the quality of the casting is seriously influenced. Therefore, the casting needs to be fed by adopting the cold iron and a riser in a matching way, so that the casting is directionally solidified.
However, the cold iron is added on the existing 3D printing sand mold, and the cold iron needs to be processed by carbon steel and other sectional materials, so that the cost is high, and the period is long. Meanwhile, the chilling block also needs to be inlaid at a specific position, so that the operation is inconvenient, and the installation cannot be realized due to structural limitation.
Disclosure of Invention
The invention provides a composite 3D printing preparation method of a casting sand mold with a chiller and the casting sand mold, aiming at solving the problems of inconvenient chiller installation and high cost in the existing 3D printing sand mold casting mold in the prior art, and the invention can arrange the chills in any positions and shapes and reduce the manufacturing cost.
The technical scheme adopted by the invention is as follows:
a composite 3D printing preparation method of a casting sand mold with chilling blocks comprises the following steps:
step S1, manufacturing a 3D printing sand mold according to a product drawing by adopting a 3D printing process;
step S2, manufacturing a 3D printing wire shell mold by adopting a wire 3D printing process according to the same product drawing in the step S1, wherein the 3D printing wire shell mold is matched with the 3D printing sand mold;
step S3, assembling the 3D printing sand mold and the 3D printing wire shell mold, wherein a cold iron cavity is formed in a gap between the 3D printing sand mold and the 3D printing wire shell mold;
step S4, adding a chromite sand mixture into the chill cavity, and compacting and solidifying the chromite sand mixture to form a chill;
and step S5, removing the 3D printing wire shell mold, and obtaining the casting sand mold with the chilling block after treatment.
Further, in the step S1, the manufacturing of the 3D printing sand mold according to the same product drawing by using the 3D printing process specifically includes the following steps:
step S11, performing casting process analysis according to a product drawing, and determining a casting system and a chill structure;
step S12, designing a three-dimensional drawing according to casting process analysis, wherein the three-dimensional drawing reflects a casting system and a chiller structure, and the chiller structure comprises the position, the shape and the size of a chiller;
step S13, carrying out three-dimensional modeling design according to a three-dimensional drawing, and reserving a process feeding amount;
step S14, manufacturing a 3D printing sand mold on a sand mold 3D printer according to three-dimensional modeling;
and step S15, cleaning the 3D printing sand mold for later use after the 3D printing sand mold is manufactured.
Further, in the step S2, the manufacturing of the 3D printed wire shell according to the product drawing by using the wire 3D printing process specifically includes the following steps:
step 21, performing casting process analysis according to a product drawing to determine a casting system and a chiller structure, wherein the chiller structure comprises the position, the shape and the size of a chiller;
step S22, designing a three-dimensional drawing of the product appearance according to casting process analysis;
step S23, carrying out three-dimensional modeling design on the product appearance according to the three-dimensional drawing of the product appearance;
step S24, manufacturing a 3D printing wire shell mold on a wire 3D printer according to the three-dimensional modeling of the product appearance;
and step S25, polishing the 3D printing wire shell mold by adopting 130-150-mesh sand paper, or spraying photosensitive resin on the surface of the 3D printing wire shell mold, and polishing by using the sand paper after curing for later use.
Further, the chromite sand mixture comprises chromite sand, thermosetting resin and a curing agent, wherein the amount of the thermosetting resin is 2-5% of the weight of the chromite sand, and the amount of the curing agent is 0.3-0.5% of the weight of the thermosetting resin.
Further, the particle size of the chromite sand is 70-140 meshes.
Further, the thermosetting resin is phenolic resin, furan resin or modified phenolic resin.
Further, the curing agent is silane or sorbitol propionate.
Further, in step S5, the step of removing the 3D printing wire shell mold and obtaining the casting sand mold with the chill after the treatment specifically includes the following steps:
step S51, removing the 3D printing wire shell mold after the chill is solidified and molded to obtain a casting model;
step S52, grinding and baking the molding surface of each die cavity of the casting model;
step S53, spraying alcohol-based paint on each die cavity of the baked casting model, and polishing the molding surface of each die cavity again after the alcohol-based paint is dried and solidified;
step S54, casting the model and combining in a mould to build a casting system;
and step S55, filling back sand, and curing to obtain the casting sand mold with the chilling block.
The casting sand mold is prepared by the composite 3D printing preparation method of the casting sand mold with the chilling block.
The invention has the beneficial effects that:
the invention provides a composite 3D printing preparation method of a casting sand mold with a chilling block and the casting sand mold, aiming at solving the problems of inconvenient chiller installation and high cost in the existing 3D printing sand mold casting mold in the prior art. The method comprises the following steps of S1, manufacturing a 3D printing sand mold according to a product drawing by adopting a 3D printing process; step S2, manufacturing a 3D printing wire shell mold according to the same product drawing by adopting a wire 3D printing process, wherein the 3D printing wire shell mold is matched with the 3D printing sand mold; step S3, assembling the 3D printing sand mold and the 3D printing wire shell mold, wherein a cold iron cavity is formed in a gap between the 3D printing sand mold and the 3D printing wire shell mold; step S4, adding a chromite sand mixture into the chill cavity, and compacting and solidifying the chromite sand mixture to form a chill; and step S5, removing the 3D printing wire shell mold, and obtaining the casting sand mold with the chilling block after treatment. According to the composite 3D printing preparation method of the casting sand mold with the chilling blocks, the 3D printing of the sand mold and the 3D printing of the wires are ingeniously combined, the chilling blocks in any positions and any shapes can be arranged by utilizing the advantages of two advanced 3D printing additive manufacturing processes, the technical problem that the chilling blocks cannot be added in the 3D printing sand mold is thoroughly solved, and the problems of high cost of forming the chilling blocks and arbitrariness of simple chilling blocks are solved. Meanwhile, the invention utilizes the advantages of good chilling characteristic of chromite sand and any generation shape of sand, and can maximally approach the surface of the casting needing chilling, thereby obtaining the best effect. The implementation of the invention opens up a brand new path for the wider application of the 3D printing sand mold.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a process flow diagram of a composite 3D printing preparation method of a casting sand mold with a chill in an embodiment.
FIG. 2 is a schematic illustration of chromite sand injection in the examples.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.
Embodiments of the invention are described in detail below with reference to the accompanying drawings.
The cold iron is added on the existing 3D printing sand mold, and the cold iron needs to be processed by sectional materials such as carbon steel and the like, so that the cost is high and the period is long. Meanwhile, the chilling block also needs to be inlaid at a specific position, so that the operation is inconvenient, and the installation cannot be realized due to structural limitation.
In order to solve the problems of inconvenience in installation and high cost of chills in the existing 3D printing sand casting mold in the prior art, the embodiment provides a composite 3D printing preparation method of a casting sand mold with chills, and the process flow is shown in fig. 1.
Specifically, the composite 3D printing preparation method of the casting sand mold with the chilling block comprises the following steps:
and step S1, manufacturing the 3D printing sand mold by adopting a 3D printing process (PCM process) according to the product drawing.
The method specifically comprises the following steps:
step S11, performing casting process analysis according to a product drawing, and determining a casting system and a chill structure;
step S12, designing a three-dimensional drawing according to casting process analysis, wherein the casting system and a chill structure are reflected in the three-dimensional drawing; the casting system comprises a pouring cup, a straight pouring gate, a side pouring gate, an inner pouring gate and the like; the cold iron structure comprises the position, the shape and the size of the cold iron;
step S13, carrying out three-dimensional modeling design according to a three-dimensional drawing, and reserving a process feeding amount;
step S14, manufacturing a 3D printing sand mold on a sand mold 3D printer according to three-dimensional modeling;
and step S15, cleaning the 3D printing sand mold for later use after the 3D printing sand mold is manufactured.
For example, a mixture of silica sand, furan resin and silane is used as a printing material, wherein the particle size of the silica sand is 70-140 meshes, the dosage of the furan resin is 3% of the weight of the silica sand, and the dosage of the silane is 0.35% of the weight of the furan resin. The 3D printing sand mold is manufactured by using printing materials on the 3D printer according to the product drawing, and the position, the shape and the size of the chilling block need to be reflected by the 3D printing sand mold.
The die cavity inside the 3D printing sand mold is a casting molding area. The chill needs to be installed in the die cavity and is matched with a riser for feeding the casting to directionally solidify the casting.
And S2, manufacturing a 3D printing wire shell mold by adopting a wire 3D printing process according to the same product drawing in the step S1, wherein the 3D printing wire shell mold is matched with the 3D printing sand mold.
The method specifically comprises the following steps:
step 21, performing casting process analysis according to a product drawing to determine a casting system and a chiller structure, wherein the chiller structure comprises the position, the shape and the size of a chiller;
step S22, designing a three-dimensional drawing of the product appearance according to casting process analysis;
step S23, carrying out three-dimensional modeling design on the product appearance according to the three-dimensional drawing of the product appearance;
step S24, manufacturing a 3D printing wire shell mold on a wire 3D printer according to the three-dimensional modeling of the product appearance;
and step S25, polishing the 3D printing wire shell mold by adopting 130-150-mesh sand paper, or spraying photosensitive resin on the surface of the 3D printing wire shell mold, and polishing by using the sand paper after curing for later use.
Wire 3D printing, also called FDM (hot melt deposition modeling), uses wires made of materials such as PLA, ABS, PC, PP, nylon, etc., typically with a diameter of 1.75mm, 3 mm.
The 3D printing wire shell mold only has a product shell shape for placing the corresponding position of the chill, and the purpose is to match with the 3D printing sand mold and show the chill cavity.
And step S3, assembling the 3D printing sand mold and the 3D printing wire shell mold, wherein a cold iron cavity is formed by a gap between the 3D printing sand mold and the 3D printing wire shell mold. When 3D printed wire rod shell mould, the position of adding the sand hole needs to be reserved, should add the sand hole and chill die cavity intercommunication.
Step S4, adding a chromite sand mixture into the chill cavity, and compacting and solidifying the chromite sand mixture to form the chill, as shown in the attached figure 2.
The chromite sand mixture comprises chromite sand, thermosetting resin and a curing agent, wherein the amount of the thermosetting resin is 2-5% of the weight of the chromite sand, and the amount of the curing agent is 0.3-0.5% of the weight of the thermosetting resin. The grain size of the chromite sand is 70-140 meshes. The thermosetting resin is phenolic resin, furan resin or modified phenolic resin. The curing agent is silane or sorbitol propionate.
For example, amorphous chill was made with chromite sand, furan resin 3wt% and silane 0.35 wt%.
And step S5, removing the 3D printing wire shell mold, and obtaining the casting sand mold with the chilling block after treatment.
The method specifically comprises the following steps:
step S51, removing the 3D printing wire shell mold after the chill is solidified and molded to obtain a casting model;
step S52, grinding and baking the molding surface of each die cavity of the casting model;
step S53, spraying alcohol-based paint on each die cavity of the baked casting model, and polishing the molding surface of each die cavity again after the alcohol-based paint is dried and solidified;
step S54, casting the model and combining in a mould to build a casting system;
and step S55, filling back sand, and curing to obtain the casting sand mold with the chilling block.
According to the preparation method of the casting model in the embodiment, the sand mold 3D printing and the wire 3D printing are skillfully combined, the arrangement of chills in any positions and any shapes can be carried out by utilizing the respective advantages of two advanced 3D printing additive manufacturing processes, the technical problem that the chills cannot be added in the 3D printing sand mold is thoroughly solved, and the problems of high cost of the formed chills and arbitrariness of simple chills are solved at the same time. Meanwhile, the invention utilizes the advantages of good chilling characteristic of chromite sand and any generation shape of sand, and can maximally approach the surface of the casting needing chilling, thereby obtaining the best effect. The implementation of the invention opens up a brand new path for the wider application of the 3D printing sand mold.
Claims (9)
1. The composite 3D printing preparation method of the casting sand mold with the chilling block is characterized by comprising the following steps of:
step S1, manufacturing a 3D printing sand mold according to a product drawing by adopting a 3D printing process;
step S2, manufacturing a 3D printing wire shell mold by adopting a wire 3D printing process according to the same product drawing in the step S1, wherein the 3D printing wire shell mold is matched with the 3D printing sand mold;
step S3, assembling the 3D printing sand mold and the 3D printing wire shell mold, wherein a cold iron cavity is formed in a gap between the 3D printing sand mold and the 3D printing wire shell mold;
step S4, adding a chromite sand mixture into the chill cavity, and compacting and solidifying the chromite sand mixture to form a chill;
and step S5, removing the 3D printing wire shell mold, and obtaining the casting sand mold with the chilling block after treatment.
2. The composite 3D printing preparation method of the casting sand mold with the chiller according to the claim 1, wherein the step S1 of manufacturing the 3D printing sand mold according to the product drawing by adopting the 3D printing process specifically comprises the following steps:
step S11, performing casting process analysis according to a product drawing, and determining a casting system and a chill structure;
step S12, designing a three-dimensional drawing according to casting process analysis, wherein the three-dimensional drawing reflects a casting system and a chiller structure, and the chiller structure comprises the position, the shape and the size of a chiller;
step S13, carrying out three-dimensional modeling design according to a three-dimensional drawing, and reserving a process feeding amount;
step S14, manufacturing a 3D printing sand mold on a sand mold 3D printer according to three-dimensional modeling;
and step S15, cleaning the 3D printing sand mold for later use after the 3D printing sand mold is manufactured.
3. The composite 3D printing preparation method of the casting sand mold with the chiller according to the claim 1, wherein the step S2 of manufacturing the 3D printing wire shell mold according to the same product drawing in the step S1 by adopting a wire 3D printing process specifically comprises the following steps:
step 21, performing casting process analysis according to the same product drawing to determine a casting system and a chiller structure, wherein the chiller structure comprises the position, the shape and the size of a chiller;
step S22, designing a three-dimensional drawing of the product appearance according to casting process analysis;
step S23, carrying out three-dimensional modeling design on the product appearance according to the three-dimensional drawing of the product appearance;
step S24, manufacturing a 3D printing wire shell mold on a wire 3D printer according to the three-dimensional modeling of the product appearance;
and step S25, polishing the 3D printing wire shell mold by adopting 130-150-mesh sand paper, or spraying photosensitive resin on the surface of the 3D printing wire shell mold, and polishing by using the sand paper after curing for later use.
4. The composite 3D printing preparation method of the casting sand mold with the chilling block according to claim 1, wherein the chromite sand mixture comprises chromite sand, thermosetting resin and a curing agent, the amount of the thermosetting resin is 2-5% of the weight of the chromite sand, and the amount of the curing agent is 0.3-0.5% of the weight of the thermosetting resin.
5. The composite 3D printing preparation method of the casting sand mold with the chilling block according to claim 4, wherein the grain size of the chromite sand is 70-140 meshes.
6. The composite 3D printing preparation method of the casting sand mold with the chiller according to claim 4, wherein the thermosetting resin is phenolic resin, furan resin or modified phenolic resin.
7. The composite 3D printing preparation method of casting sand molds with chills according to claim 4, wherein the curing agent is silane or sorbitol propionate.
8. The composite 3D printing preparation method of a casting sand mold with a chill according to claim 1, wherein the step S5 of removing the 3D printing wire shell mold and obtaining the casting sand mold with a chill after the treatment specifically comprises the following steps:
step S51, removing the 3D printing wire shell mold after the chill is solidified and molded to obtain a casting model;
step S52, grinding and baking the molding surface of each die cavity of the casting model;
step S53, spraying alcohol-based paint on each die cavity of the baked casting model, and polishing the molding surface of each die cavity again after the alcohol-based paint is dried and solidified;
step S54, casting the model and combining in a mould to build a casting system;
and step S55, filling back sand, and curing to obtain the casting sand mold with the chilling block.
9. The casting sand mold is characterized by being prepared by the composite 3D printing preparation method of the casting sand mold with the chilling block according to any one of claims 1 to 8.
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| CN202111429721.0A CN114210944B (en) | 2021-11-29 | 2021-11-29 | Composite 3D printing preparation method of casting sand mold with chill and casting sand mold |
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| CN202111429721.0A CN114210944B (en) | 2021-11-29 | 2021-11-29 | Composite 3D printing preparation method of casting sand mold with chill and casting sand mold |
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| CN114210944B CN114210944B (en) | 2023-11-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114210944B (en) | 2023-11-17 |
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