CN106513572A - 3d printing sand mould and manufacturing method thereof - Google Patents
3d printing sand mould and manufacturing method thereof Download PDFInfo
- Publication number
- CN106513572A CN106513572A CN201610871974.6A CN201610871974A CN106513572A CN 106513572 A CN106513572 A CN 106513572A CN 201610871974 A CN201610871974 A CN 201610871974A CN 106513572 A CN106513572 A CN 106513572A
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- China
- Prior art keywords
- sand mold
- printing
- cylindrical ring
- internal layer
- sand mould
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- 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
- B33Y80/00—Products made by additive manufacturing
Abstract
The invention provides a 3D printing sand mould which comprises an inner-layer sand mould and an outer-layer sand mould. The inner-layer sand mould is provided with an inner surface where a casting is molded, and an outer surface opposite to the inner surface, wherein the inner-layer sand mould is contained inside the outer-layer sand mould, and the inner-layer sand mould is connected with the outer-layer sand mould through a middle-layer sand mould; and the middle-layer sand mould comprises a plurality of column zones and solid zones arranged between adjacent column zones in a filling manner, each column zone comprises a plurality of cylindrical rings which extend in the axial direction and are connected with each other in the radial direction, one end of each column zone in the axial direction is connected with the outer surface, and the other end of each column zone in the axial direction is connected with the outer-layer sand mould. The invention further provides a method for manufacturing the above sand mould. The 3D printing sand mould aims at reducing the cost for printing the 3D printing sand mould, shortening the period for printing the 3D printing sand mould, and guaranteeing the whole intensity and stability of the 3D printing sand mould.
Description
Technical field
The present invention relates to 3D printing sand casting production technical field, more specifically, be related to a kind of 3D printing sand mold and
Its manufacture method.
Background technology
3D printing (3D printing, i.e. 3 D-printing) i.e. one kind of rapid shaping technique, it is one kind with mathematical model
Based on file, with powdery metal or plastics etc. can jointing material, come the skill of constructed object by way of successively printing
Art.
With the popularization and application of 3D printing technique, the method for Foundry Production is carried out in industry using 3D printing sand mold at present
It is inside gradually popular.The method that this 3D printing produces sand mold, can substitute traditional Manual mold modeling process, gained sand mold tool
Have the compression strength beyond one times of manual sand mold, at the same can direct various complicated sand mould structures of printing-forming, with high
Formability.
The sand mold that existing 3D printing is formed is usually solid structure.Although sand mold has enough intensity and stablizes
Property, but which prints, and cost is of a relatively high, printing interval is longer.
The content of the invention
For problem present in correlation technique, it is an object of the invention to provide a kind of printing cost and cycle are relatively low simultaneously
Can guarantee that 3D printing sand mold and its manufacture method of bulk strength and stability.
For achieving the above object, one aspect of the present invention provides a kind of 3D printing sand mold, including：Internal layer sand mold and outer layer sand
Type, internal layer sand mold have the inner surface for mould casting, and the outer surface relative with inner surface, and wherein internal layer sand mold is accommodated
Inside outer layer sand mold, and connected by middle level sand mold between internal layer sand mold and outer layer sand mold, wherein, middle level sand mold includes many
Individual cylinder region, and the solid area being filled between adjacent columns region, each cylinder region include multiple sides vertically
To the cylindrical ring for extending and be radially connected to each other, cylinder region one end in axial direction is connected with outer surface, another
End is connected with outer layer sand mold.
According to one embodiment of present invention, outer surface is configured to a part for multiaspect external surface, and outer surface
Each plane is connected with a cylinder region respectively.
According to one embodiment of present invention, the axial direction of cylinder region is perpendicular to plane.
According to one embodiment of present invention, cylindrical ring is polygon cylindrical ring, and two neighboring cylindrical ring can be along footpath
Arrange to direction lateral alternate.
According to one embodiment of present invention, each cylinder region includes multilayer cylindricality circular layer, and adjacent cylindricality circular layer is along axle
To direction be connected to each other and adjacent cylindricality circular layer in cylindrical ring radially stagger each other setting.
According to one embodiment of present invention, the quantity of the cylindricality circular layer of middle level sand moldWherein L is foundry goods
Wall thickness, h for foundry goods height.
According to one embodiment of present invention, the thickness range of cylindrical ring is 3-5mm, and altitude range is 20mm-30mm, and
And the area surrounded by cylindrical ring is less than 4cm2。
According to one embodiment of present invention, the thickness range of outer layer sand mold is 20mm-50mm.
According to one embodiment of present invention, the thickness range of internal layer sand mold is 30mm-50mm.
According to another aspect of the present invention, a kind of method of manufacture 3D printing sand mold is also provided, including：
S1：Internal layer sand mold is designed according to casting structure to be formed, and making the outer surface of internal layer sand mold, to be configured to multiaspect external
The part on surface；
S2：It is determined that the cylindricality ring size and arrangement mode of the cylinder region of the middle level sand mold being connected with outer surface, and in phase
Solid area is filled between adjacent cylinder region；
S3：In middle level sand mold exterior design outer layer sand mold, to be collectively forming sand mold model with internal layer sand mold and middle level sand mold；
S4：Sand mold model is imported into 3D printer printing shaping.
The present invention Advantageous Effects be：
The present invention is by arranging the post in axial direction extending and being radially connected to each other in 3D printing sand mold
Shape ring, can effectively reduce the use of printed material；And due to the hollow-core construction of cylindrical ring, it is possible to reduce printer head
Walking path, and then printing interval can be shortened；Further, since the cylindrical ring of middle level sand mold is in axial direction supported on internal layer sand
Between type and outer layer sand mold, it is ensured that there is enough bulk strengths and structural stability in 3D printing sand mold, with casting
During ensure 3D printing sand mold have sufficient intensity opposing molten iron cavity filling process in buoyancy；Further, since cylinder region it
Between be also filled with solid area, can further increase the strength and stability of 3D printing sand mold.
Description of the drawings
Fig. 1 is the sectional view of one embodiment of the invention 3D printing sand mold；
Fig. 2 is the exploded view of embodiment illustrated in fig. 1 3D printing sand mold；
Fig. 3 is the schematic diagram of one embodiment of the invention cylinder region；
Fig. 4 is the schematic diagram of one embodiment of the invention cylindrical ring；
Fig. 5 is the sectional view of another embodiment of the present invention 3D printing sand mold；
Fig. 6 is the flow chart of the manufacture method of 3D printing sand mold of the present invention.
Specific embodiment
Below with reference to accompanying drawing, embodiments of the present invention is described in detail.
As shown in Figures 1 to 4, according to one embodiment of present invention, there is provided a kind of 3D printing sand mold, including：Internal layer
Sand mold 12 and outer layer sand mold 16, internal layer sand mold 12 have the inner surface for mould casting 10, and relative with inner surface outer
Surface, wherein internal layer sand mold 12 are contained in inside outer layer sand mold 16, and in passing through between internal layer sand mold 12 and outer layer sand mold 16
Layer sand mold 14 connects, and wherein, middle level sand mold 14 includes multiple cylinder regions 18, and is filled between adjacent columns region 18
Solid area 20, each cylinder region 18 include the cylindrical ring that multiple in axial direction L1 extend and are radially connected to each other
22, one end of the in axial direction L1 of cylinder region 18 is connected with outer surface, and the other end is connected with outer layer sand mold.
It is to be understood that above-mentioned axial direction L1 refers to the axial direction L1 of the cylindrical ring 22 in cylinder region 18,
And hereinafter the axial direction L1 of cylinder region 18 again refers to the axial direction L1 of the cylindrical ring 22 in cylinder region 18.
In addition, above-mentioned radial direction refers to the rectilinear direction of the diameter or radius along each cylindrical ring 22, that is to say, that above-mentioned radial direction
Direction is perpendicular to axial direction L1.And it is to be understood that in the accompanying drawings, due to there is no casting in certain embodiments
Part, therefore the space representated by foundry goods 10 can also refer to the cavity for forming foundry goods 10.
In the above-described embodiments, by arrange in 3D printing sand mold in axial direction L1 extend and radially that
The cylindrical ring 22 of this connection, can effectively reduce the use of printed material；And due to the hollow-core construction of cylindrical ring 22, can subtract
The walking path of few printer head, and then printing interval can be shortened；Further, since the cylindrical ring 22 of middle level sand mold 14 is along axle
It is supported between internal layer sand mold 12 and outer layer sand mold 16 to direction L1, it is ensured that have enough entirety strong in 3D printing sand mold
Degree and structural stability, to ensure that in casting process it is floating in sufficient intensity opposing molten iron cavity filling process that 3D printing sand mold has
Power；Further, since being also filled with solid area 20 between cylinder region 18, can further increase the intensity of 3D printing sand mold
And stability.
Referring again to Fig. 1, according to one embodiment of present invention, the outer surface of internal layer sand mold 12 is configured to polyhedron appearance
The part in face, and each plane of outer surface is connected with a cylinder region 18 respectively.It is to be understood that internal layer sand mold
12 outer surface is so structured that a part for arbitrary polyhedral structure, such as hexahedron, octahedron etc..It should also be appreciated that
It is that, in order to increase the steadiness of 3D printing sand mold, the outer surface of internal layer sand mold 12 can be designed as shape as far as possible with foundry goods 10
It is consistent, the outer surface of internal layer sand mold 12 is modified to into planar structure again then, facilitates connection middle level sand mold 14.
It is to be understood that the axial direction L1 of the cylinder region 18 of middle level sand mold 14 can be with above-mentioned internal layer sand mold 12
Each plane of outer surface is angled to be arranged.
Or, as shown in figure 5, according to one embodiment of present invention, the axial direction L1 of cylinder region 18 is perpendicular to flat
Face.In other words, each projection of cylindrical ring 22 in the plane connected by which of cylinder region 18 is fully located at cylindrical ring 22
In the range of the surface being connected with plane.So, 18 vertical support of cylinder region internal layer sand mold 12 and outer layer sand mold 16 it
Between, can further increase the structural strength and stability of 3D printing sand mold.
According to one embodiment of present invention, cylindrical ring 22 is between polygon cylindrical ring, and two neighboring cylindrical ring
Radially lateral alternate can arrange.That is, cylindrical ring 22 partly can stagger be configured to it is as shown in Figure 3 cellular
Structure.As such, it is possible to further improve the structural strength and stability of middle level sand mold 14, and then improve the structure of 3D printing sand mold
Strength and stability.Certainly, cylindrical ring 22 can also be configured to realize any other structures of its supporting role, for example,
In one embodiment of the invention, cylindrical ring 22 can also be configured to the cylindrical ring of cylinder, or, in another embodiment
In, cylindrical ring 22 can also be configured to regular polygon cylindricality ring, this can as the case may be depending on, the present invention is not limited to
This.
According to one embodiment of present invention, each cylinder region 18 includes multilayer cylindricality circular layer, adjacent cylindricality circular layer edge
Axial direction L1 be connected to each other and adjacent cylindricality circular layer in cylindrical ring 22 radially stagger each other setting.Namely
Say, in axial direction L1's all of cylindricality circular layer is connected to each other, and is supported between internal layer sand mold 12 and outer layer sand mold 16.Also,
As the cylindrical ring 22 in adjacent two layers cylindricality circular layer will not be alignd setting, the strong of middle level sand mold 14 can be so further enhanced
Degree and stability.
Further, according to one embodiment of present invention, the quantity of the cylindricality circular layer of middle level sand mold 14
Wall thickness of the wherein L for foundry goods 10, height of the h for foundry goods 10.It is to be understood that foundry goods 10 is referred to by the 3D printing herein
The foundry goods that sand casting is formed.
According to one embodiment of present invention, in order to further improve the strength and stability of cylinder region 18, cylindrical ring
22 thickness range is 3-5mm, and altitude range is 20mm-30mm, and the area surrounded by cylindrical ring 22 is less than 4cm2.Should
It is appreciated that as the case may be, cylindrical ring 22 can also be configured to other sizes, and the present invention is not limited to this.
According to one embodiment of present invention, the thickness range of outer layer sand mold 16 is 20mm-50mm.Certainly, it should can be with
Understand, as the case may be, the thickness of outer layer sand mold 16 can also be configured to other sizes, e.g., less than 20mm or be more than
50mm, the present invention are not limited to this.
According to one embodiment of present invention, the thickness range of internal layer sand mold 12 is 30mm-50mm.Certainly, it should can be with
Understand, as the case may be, the thickness of internal layer sand mold 12 can also be configured to other sizes, e.g., less than 30mm or be more than
50mm, the present invention are not limited to this.
As shown in fig. 6, the embodiment of another aspect of the invention also provides a kind of method of manufacture 3D printing sand mold, bag
Include：
S1：Internal layer sand mold is designed according to casting structure to be formed, and making the outer surface of internal layer sand mold, to be configured to multiaspect external
The part on surface；
S2：It is determined that the cylindricality ring size and arrangement mode of the cylinder region of the middle level sand mold being connected with outer surface, and in phase
Solid area is filled between adjacent cylinder region；
S3：In middle level sand mold exterior design outer layer sand mold, to be collectively forming sand mold model with internal layer sand mold and middle level sand mold；
S4：Sand mold model is imported into 3D printer printing shaping.
The 3D printing sand mold formed by said method, is provided with axial direction L1 and extends and radially connect each other
The cylindrical ring 22 for connecing, can effectively reduce the use of printed material；And due to the hollow-core construction of cylindrical ring 22, it is possible to reduce beat
The walking path of print machine shower nozzle, and then printing interval can be shortened；Further, since the cylindrical ring 22 of middle level sand mold 14 is square vertically
Be supported between internal layer sand mold 12 and outer layer sand mold 16 to L1, it is ensured that 3D printing sand mold have enough bulk strengths and
Structural stability, to ensure that in casting process 3D printing sand mold has the buoyancy in sufficient intensity opposing molten iron cavity filling process；Separately
Outward, due to being also filled with solid area 20 between cylinder region 18, the intensity of 3D printing sand mold and steady can further be increased
It is qualitative.
The advantage by using the disposable high-precision printing shaping of 3D printing of the present invention, by 3D printing sand mold overall structure
Optimization, devises a kind of stratiform sand mould structure, makes 3D printing sand mold remain to obtain higher on the premise of print volume is reduced
Bulk strength and structural stability, to reach the use for reducing print procedure resinoid bond, reduce printing cost raising simultaneously
The purpose of printing effect.
According to one embodiment of present invention, there is provided a kind of 3D printing sand mold method for designing, it is that original overall sand mold is set
A kind of layer structure is counted into, layer structure includes internal layer sand mold 12, middle level sand mold 14 and outer layer sand mold 16.
Internal layer sand mold 12 refers to the sand mold part contacted with foundry goods on the inside of sand mold, and its structure is with certain thickness
Solid layer of sand, advises scope of design 30mm-50mm, the structure phase of its one end (the inner) shape and foundry goods 10 according to sand mold size
Together, for forming casting structure, the other end (outer end) design profile keeps profile-followed with foundry goods as far as possible, while by its surfacing being
Planar structure (convenient connection middle level sand mold 14)；Middle level sand mold 14 refer to be connected to internal layer sand mold 12 outer end with special construction
Transition zone sand mold, its structure include cylinder region 18 and solid area 20, and cylinder region 18 is by hollow with rock-steady structure
Polygon (such as regular hexagon, Thiessen polygon etc.) sand pole unit constitutes (i.e. cylindrical ring 22), and hollow sand polygon post is in sky
Between the stretched polygon cylinder with certain wall thickness and height, its thickness of column advises design load scope according to sand mold size
3-5mm, its single height of column advise design load scope 20mm-30mm according to sand mold size, its single area of a polygon design
Value scope suggestion is less than 4cm2.Sand post close-packed arrays is piled up with S layers in radial direction, between layers many in the horizontal direction
Side shape dislocation docking, the radial direction of sand post are vertical with the outer transverse plane of internal layer sand mold, and cylinder number of plies S of middle level sand mold is according to casting
Wall thickness size L of part and foundry goods height h determine, rule of thumb formula S=can be calculated, and solid area 20 refers to incorgruous distribution
Entity connection transitional region between sand post；Outer layer sand mold 16 is to be connected to the solid shell core in 14 outer end of middle level sand mold, for wrapping up
Middle level sand mould structure, improves bulk strength, advises shell core thickness design load scope 20-50mm according to sand mold size.
In another embodiment of the present invention, a kind of manufacture method of 3D printing sand mold is further related to, is comprised the following steps that：
Internal layer sand mold 12 is designed according to casting structure, its profile keeps profile-followed with foundry goods as far as possible, with maximized reduction
The volume of layer sand mold, while be integrated into multiple planes by outer face；
The height and main body wall thickness of measurement foundry goods 10, calculates the design number of plies needed for the sand mold of middle level and (locally exceeds main wall
The big position of thick thickness need to increase the design number of plies)；
Middle level sand mold 14 is designed on all outer transverse planes of internal layer sand mold 12, after the completion of design, by all incorgruous middle level sand
Space in the middle of type 14 is filled up with entity；
In middle level, 14 periphery global design 20mm abundant body sand mold (i.e. outer layer sand mold 16) of sand mold carries out sealing, improves overall
Intensity；
The sand mold for designing is imported into 3D printer printing shaping.
The present invention effectively reduces the 3D printing cost of sand mold, and printing effect is obviously improved；And middle level sand mold 14
Cellular structure design alleviate sand mold weight, while ensure that bulk strength and the structural stability of sand mold；Middle level sand mold
14 hollow structure reduces the gas forming amount of casting process, while the gas permeability of sand mold gets a promotion, reduces casting process
Pore class defect.
The preferred embodiments of the present invention are these are only, the present invention is not limited to, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of 3D printing sand mold, it is characterised in that include：
Internal layer sand mold (12) and outer layer sand mold (16), described internal layer sand mold (12) have the inner surface for mould casting, and
The outer surface relative with the inner surface, wherein described internal layer sand mold (12) are contained in described outer layer sand mold (16) inside, and
It is connected by middle level sand mold (14) between internal layer sand mold (12) and outer layer sand mold (16),
Wherein, described middle level sand mold (14) include multiple cylinder regions (18), and are filled in adjacent the cylinder region (18)
Between solid area (20), each described cylinder region (18) including multiple in axial direction (L1) extend and radially
The cylindrical ring (22) being connected to each other, cylinder region (18) are connected with the outer surface along one end of the axial direction (L1)
Connect, the other end is connected with outer layer sand mold (16).
2. 3D printing sand mold according to claim 1, it is characterised in that the outer surface is configured to multiaspect external surface
A part, and each plane of the outer surface is connected with a cylinder region (18) respectively.
3. 3D printing sand mold according to claim 2, it is characterised in that the axial direction of cylinder region (18)
(L1) perpendicular to the plane.
4. 3D printing sand mold according to claim 1, it is characterised in that described cylindrical ring (22) are polygon cylindrical ring,
And two neighboring the cylindrical ring (22) radially lateral alternate can be arranged.
5. 3D printing sand mold according to claim 1, it is characterised in that each described cylinder region (18) include multicolumn
Shape circular layer, the adjacent cylindricality circular layer along the axial direction (L1) be connected to each other and the adjacent cylindricality circular layer in cylindricality
Ring (22) staggers setting along the radial direction each other.
6. 3D printing sand mold according to claim 5, it is characterised in that the number of the cylindricality circular layer of middle level sand mold (14)
AmountWherein L is the wall thickness of the foundry goods, and h is the height of the foundry goods.
7. 3D printing sand mold according to claim 1, it is characterised in that the thickness range of cylindrical ring (22) is 3-
5mm, altitude range are 20mm-30mm, and the area surrounded by the cylindrical ring (22) is less than 4cm2。
8. 3D printing sand mold according to claim 1, it is characterised in that the thickness range of outer layer sand mold (16) is
20mm-50mm。
9. 3D printing sand mold according to claim 1, it is characterised in that the thickness range of internal layer sand mold (12) is
30mm-50mm。
10. it is a kind of manufacture 3D printing sand mold method, it is characterised in that include：
S1：Internal layer sand mold (12) is designed according to casting structure to be formed, and is configured to the outer surface of internal layer sand mold (12)
A part for multiaspect external surface；
S2：It is determined that cylindrical ring (22) size of the cylinder region (18) of the middle level sand mold (14) being connected with the outer surface and arrangement
Mode, and solid area (20) is filled between adjacent cylinder region (18)；
S3：In middle level sand mold (14) exterior design outer layer sand mold (16), with internal layer sand mold (12) and the middle level
Sand mold (14) is collectively forming sand mold model；
S4：Sand mold model is imported into 3D printer printing shaping.
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| CN201610871974.6A CN106513572B (en) | 2016-09-30 | 2016-09-30 | 3D printing sand mold and its manufacturing method |
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|---|---|---|---|
| CN201610871974.6A CN106513572B (en) | 2016-09-30 | 2016-09-30 | 3D printing sand mold and its manufacturing method |
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| KR20200066883A (en) * | 2018-12-03 | 2020-06-11 | 한국생산기술연구원 | Lightweight design method of mold for sand casting |
| WO2020116762A1 (en) * | 2018-12-03 | 2020-06-11 | 한국생산기술연구원 | Lightweight pattern formed on casting sand mold, and casting sand mold lightweight design method using same |
| CN113263135A (en) * | 2021-05-24 | 2021-08-17 | 沈阳铸造研究所有限公司 | Spatial gridding printing method for 3D printing sand mold |
| CN113263135B (en) * | 2021-05-24 | 2023-02-17 | 沈阳铸造研究所有限公司 | Spatial grid printing method for 3D printing sand mold |
| CN115194090A (en) * | 2022-07-25 | 2022-10-18 | 共享智能装备有限公司 | 3D printing sand mold and casting method |
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| CN106513572B (en) | 2018-10-19 |
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