CN107321917A - A kind of many material sand mold 3D printing manufacturing process - Google Patents
A kind of many material sand mold 3D printing manufacturing process Download PDFInfo
- Publication number
- CN107321917A CN107321917A CN201710532102.1A CN201710532102A CN107321917A CN 107321917 A CN107321917 A CN 107321917A CN 201710532102 A CN201710532102 A CN 201710532102A CN 107321917 A CN107321917 A CN 107321917A
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- sand
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Classifications
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- 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
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The invention belongs to quickly shaping device field, a kind of many material sand mold 3D printing manufacturing process are disclosed.This method is successively to respectively enter the 3D printing roughing sand of two or more unlike materials in mixing device by vacuum feeder to carry out uniform stirring with curing agent, and both or a variety of molding sand are respectively fed in two sets or many array sanding gears of the set with identical structure afterwards.After printing starts, computer controls array sanding gear according to printing sand mold current layer cross section information, and the molding sand of two or more unlike materials is laid on demand；Afterwards, computer control printing head, according to printing sand mold current layer cross section information, need based jet resinoid bond.Reaction is crosslinked after resinoid bond when the roughing sand for having premixed curing agent runs into, solidifies molding sand.Sanding layer by layer, jet binder, is finally completed sand mold printing layer by layer.There is gradient intensity, precision and exchange capability of heat using this method manufacture casting mold, with the value promoted the use of.
Description
Technical field
The invention belongs to quickly shaping device field, and in particular to a kind of many material sand mold 3D printing manufacturing process.
Background technology
3D printing technique is also known as three-dimensional printing technology, refers to using printhead, nozzle or other printing techniques deposition material
Expect to manufacture the technology of object, belong to a kind of increases material manufacturing technology, be the important directions that Quick-forming field is studied at present.It is
Refer to the combination that the complex three-dimensional model of required Forming Workpiece is converted into simple two-dimensional section by section.Utilize material powder
Successively print, successively accumulate, form the threedimensional model with arbitrarily complicated structure from bottom to top.
Sand mold 3D printing is a kind of RP technique for being based primarily upon droplet ejection shaping.At present, sand mold 3D printing is set
It has been related to storage, supply, laying, the recovery of molding sand, tree in the standby rapid forming equipment for being all based on powder bed greatly, forming process
The processes such as the need based jet of fat binding agent, sand grains is bonded after the resinoid bond of injection runs into the molding sand for having premixed curing agent
It is solidified into required sand mold.Sanding gear is as the important component of quickly shaping device, and its stability and reliability will be direct
Influence the quality of drip molding.For casting process, casting its change of temperature field in casting cycle drastically influence casting
Quality.The sanding gear of existing 3D printing equipment can only all lay the powder of homogenous material, the thermal conductivity factor of whole sand mold
It is identical, the control in temperature field in being realized by other supplementary means to casting cycle is needed in the casting cycle for carrying out intricate casting
System.Thus lay single powder sanding gear often come with some shortcomings part：
（1）Its thermal conductivity factor of the sand mold of single material is identical, it is impossible to realize the Self Adaptive Control in temperature field；
（2）Its molding sand particle diameter of the sand mold of single material is identical, it is impossible to realize the control of sand mold intensity and precision.
The content of the invention
The problem of various material molding sand lays printing-forming can not be realized for current sand mold 3D printing equipment, the present invention is carried
A kind of many material sand mold 3D printing manufacturing process are gone out.
Many material sand mold 3D printing manufacturing process are that the roughing sand of unlike material is successively passed through vacuum feeding by printing before starting
Machine feeding mixing device in curing agent carry out uniform stirring, then by the molding sand for being mixed with curing agent be stored in respectively two or
In multiple structure identical sanding gears.Sanding gear is made up of many opening valves, and during sanding, computer is according to casting mold
Casting requirement, various heat exchange area lay various heat exchange coefficient molding sand, afterwards computer control array printing head according to
The two-dimensional section information need based jet binding agent of sand mold current layer, lays, prints layer by layer layer by layer, completes the making of sand mold.
To achieve the above object, many material sand mold 3D printing manufacturing process of the invention are carried out according to the following steps：
Step 1：Workbench is moved down and controls sanding gear to lay one layer of roughing sand without curing agent as bed load after a segment distance,
After bed load has been laid, sanding gear moves back to initial position；
Step 2：, then will be mixed by quartz sand roughing sand A by being stirred in vacuum feeder feeding mixing device with curing agent
Closed curing agent quartz sand A feeding array sanding gear sanding mechanism a in, the sanding mechanism have it is multiple can be independent
Sanding mouthful is opened and closed, afterwards by zircon sand roughing sand B by being stirred in vacuum feeder feeding mixing device with curing agent, then
The zircon sand B for being mixed with curing agent is sent into the sanding mechanism b of array sanding gear, sanding mechanism b and sanding mechanism a has
There is identical structure, repeat the process until all sanding mechanisms of array sanding gear fill the molding sand of unlike material；
Step 3:Workbench moves down a thickness, array sanding gear under control of the computer, according to the sand mold of current layer
Cross sectional shape is opened and closed the sanding mouthful of correspondence sanding mechanism at different positions, and the molding sand of a variety of unlike materials is laid on demand；
Step 4：After molding sand has been laid, array sanding gear moves back to initial position, and computer controls printing head according to sand
Type current layer cross section information need based jet binding agent, completes the printing of current layer sand mold；
Step 5：Repeat step 3, step 4, when the storage sand amount in sanding gear is few, sanding gear returns to initial position and laid equal stress on
Multiple step 2 carries out sand loading；
Step 6：Repeat step 6, is printed layer by layer, until final successively stack completes sand mold printing；
Step 7：Not glued molding sand is cleaned out, sand mold is taken out.
Many material sand mold 3D printing manufacturing process, emery dust used in casting mold is quartz, zircon sand, ceramsite sand, chromite sand
Or the casting refractory molding sand such as olivine sand, it is 70/140 mesh to commonly use granularity.
Many material sand mold 3D printing manufacturing process, injection binding agent used is organic viscous for furane resins, phenolic resin etc.
Tie agent or inorganic adhesive.
Using above-mentioned technical scheme, with advantages below：
1st, the making of thermal conductivity factor graded sand mold is realized, the Self Adaptive Control carried out to casting temperature；
2nd, the making for becoming particle diameter sand mold is realized, Self Adaptive Control is carried out to sand mold intensity and precision.
Brief description of the drawings
Fig. 1 is more, and material sand mold 3D printing building mortion diagram is intended to；
The laying structural scheme of mechanism of Fig. 2 array sanding gears；
The schematic diagram of Fig. 3 shop fixtures sand；
Fig. 4 spreads the process schematic of first layer molding sand；
Fig. 5 arrays shower nozzle sprays the process schematic of bonding agent；
The rectangle test sample figure of many material sand mold 3D printing shapings of Fig. 6.
In figure:1 (a), sand tank a；1 (b), sand tank b；2nd, vacuum charging device；3rd, mixing device；4th, curing agent is deposited
Storage tank；The laying mechanism a of 5 (a), array sanding gear；The laying mechanism b of 5 (b), array sanding gear；6th, it may move and rise
Platform drops；7th, array shower nozzle；8th, working chamber；9th, sanding mouthful opening and closing baffle plate；10th, sanding hopper；11st, stragith edge；12nd, sanding on demand
Mouthful；13rd, the bed load without curing agent；14th, the layer of sand of two kinds of materials；15th, workbench；16th, rectangle test sample first layer is cut
Face；17th, rectangle test sample.In another figure：A, represent quartz sand；B, represent zircon sand；F, sanding gear sanding direction and
Array shower nozzle scanning and printing direction.
Embodiment
A kind of many material sand mold 3D printing manufacturing process proposed by the present invention, first by the refractory material roughing sand of unlike material
Successively sent into by vacuum charging device in mixing device, mixing device connection curing agent hopper is added necessarily while mulling
The molding sand of unlike material, is respectively fed in the different sanding mechanisms of array sanding gear by the curing agent of amount after stirring.
After printing starts, workbench moves down certain distance, and one layer of the uniform laying of array sanding gear movement is free of the roughing sand of curing agent
As bed load, after the completion of bed load laying, sanding gear is moved back to initial position, is that sanding is ready next time；Workbench according to
The demand of printed sand mold, under control of the computer, moves down a thickness, the same control in computer of array sanding gear
System is lower to be moved, and uniform sanding, array sanding gear is made up of two or more structure identical sanding mechanisms, different
The molding sand of unlike material is housed, under control of the computer, array sanding gear is according to sand mold current layer in sanding mechanism
The complementary opening and closing sanding mouthful of profile information carries out the laying of many material molding sand；After sanding is finished, the movement of array sanding gear
Return initial position, computer control print system movement, array shower nozzle is according to the profile information need based jet tree of sand mold current layer
Fat binding agent, completes the printing of current layer sand mold, and print system equally after current layer printing is completed, moves back to initial position；Battle array
Sand amount is stored up in the inspection of column sanding gear, if storage sand amount is unsatisfactory for given threshold, hopper will toward loading gravel in sanding gear,
Until meeting given threshold；Workbench continues to move down a thickness, repeats the process of sanding and printing, sanding, beats layer by layer layer by layer
Print, sand mold needed for final shaping.After the completion of sand mold printing, working chamber is opened, not glued roughing sand is disposed, sand mold is taken out.
The present invention is exemplified by shaping the rectangle test sample of two kinds of materials, and step is as follows：
Step 1：Prepare quartz sand and zircon sand that granularity is 70/140 mesh, the quartz sand and zircon sand are respectively charged into sand tank
1（a）With 1（b）In, it is used as the raw material used in 3D printing casting mold；
Step 2：Print before casting mold, the floating sand cleared up first in the working chamber 8 of 3D printing building mortion does working region
Only, no float sand；Then, computer control transmission mechanism drives movable working platform 6, makes with along g to 5mm is moved down, seeing Fig. 3；Battle array
Column sanding gear 5 under control of the computer, uniformly lays one layer of bed load on the table, as shown in figure 3, the bed load is used
Separated in by shaped casting with workbench；Then, array sanding gear moves back to initial position；
Step 3：Vacuum charging device 2 is by sand tank 1（a）In quartz sand emery dust suction mixing device 3 in curing agent carry out
Stirring, curing agent is stored in curing agent storage tank 4；Then mixed molding sand A is sent into the sand gritter of array sanding gear
Structure 5（a）In；Afterwards, vacuum charging device 2 is by sand tank 1（b）In zircon sand emery dust suction mixing device 3 in curing agent
It is stirred；Then mixed molding sand B is sent into the sanding mechanism 5 of array sanding gear（b）In, see Fig. 1；
Step 4：When printing casting mold, computer controls working plate 6 along g to moving down 0.5mm；Then computer drives array
Power spreading device 5（a）, 5（b）The 1st layer of molding sand for being mixed with curing agent is laid along workbench, emery dust thickness is 0.5mm, sees Fig. 4, its
Middle sanding mechanism 5（a）Sanding mouthful on the left of opening correspondence working chamber, and sanding mechanism 5（b）Open the paving on the right side of correspondence working chamber
Sanding gear moves back to initial position after the completion of sand mouthful, sanding；
Step 5：Computer controls two-dimensional motion system and array shower nozzle 7 to casting mold area according to the first layer cross-section data of casting mold
Domain sprayed resin bonding agent, crosslinks reaction joining molding sand when resin adhesive runs into, is grown after the curing agent in molding sand
First layer cross section 16 of square test sample, is shown in Fig. 5；Then array shower nozzle 7 moves back to initial position；
Step 6：Computer is according to each individual-layer data of casting mold, and repeated the above steps 4 and step 5, and casting mold is printed layer by layer
Each cross sectional shape；When the storage sand amount in sanding gear is few, sanding gear returns to initial position and repeat step 3 enters luggage
Sand；Until final successively stack forms casting mold 17, Fig. 6 is seen；
Step 7：After the completion of casting mold printing, the remaining sand that bonding agent is set without spray is removed, the casting of rectangle test sample entity is taken out
Type.
Claims (7)
1. a kind of many material sand mold 3D printing manufacturing process, it is characterised in that this method comprises the following steps：
Step 1：Workbench is moved down and controls sanding gear to lay one layer of roughing sand without curing agent as bed load after a segment distance,
After bed load has been laid, sanding gear moves back to initial position；
Step 2：By roughing sand a1 by being stirred in vacuum feeder feeding mixing device with curing agent, then it will be mixed with solid
In the sanding mechanism a2 of the molding sand a1 feeding array sanding gears of agent, the sanding mechanism, which has, multiple can independently be opened and closed paving
Sand mouthful；
Step 3：By roughing sand b1 by being stirred in vacuum feeder feeding mixing device with curing agent, then it will be mixed with solid
In the sanding mechanism b2 of the molding sand b1 feeding array sanding gears of agent, sanding mechanism b2 and sanding mechanism a2 has identical
Structure, repeats the process until all sanding mechanisms of array sanding gear fill the molding sand of unlike material；
Step 4:Workbench moves down a thickness, array sanding gear under control of the computer, according to the sand mold of current layer
Cross sectional shape is opened and closed the sanding mouthful of correspondence sanding mechanism at different positions, and the molding sand of a variety of unlike materials is laid on demand；
Step 5：After molding sand has been laid, array sanding gear moves back to initial position, and computer controls printing head according to sand
Type current layer cross section information need based jet binding agent, completes the printing of current layer sand mold；
Step 6：Repeat step 4, step 5, when the storage sand amount in sanding gear is few, sanding gear returns to initial position and laid equal stress on
Multiple step 2,3 carry out sand loading；
Step 7：Repeat step 5, is printed layer by layer, until final successively stack completes sand mold printing；
Step 8：Not glued molding sand is cleaned out, sand mold is taken out.
2. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：Various material is laid on demand
Molding sand is the sanding mouthful by the different sanding mechanisms of complementary opening and closing array sanding gear to realize.
3. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：Unlike material roughing sand according to
Its quality proportioning adds the curing agent of different quality.
4. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：This method can be realized not
The molding sand of unlike material is used with layer of sand, can also realize that same layer of sand uses the molding sand of unlike material.
5. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：The resinoid bond of injection
For the organic or inorganic binding agent such as low viscosity furane resins, phenolic resin.
6. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：The curing agent is benzene sulphur
The mixture of the organic acids such as acid, toluenesulfonic acid, p-methyl benzenesulfonic acid, xylene monosulfonic acid respectively with the inorganic acid such as sulfuric acid.
7. many material sand mold 3D printing manufacturing process according to claim 1, it is characterised in that：Molding sand used in the casting mold
For one kind in quartz sand, ceramsite sand, nice foundry sand, chromite sand, zircon sand, limestone sand, emergy, magnesia, olivine sand
Or it is a variety of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532102.1A CN107321917A (en) | 2017-07-03 | 2017-07-03 | A kind of many material sand mold 3D printing manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532102.1A CN107321917A (en) | 2017-07-03 | 2017-07-03 | A kind of many material sand mold 3D printing manufacturing process |
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| Publication Number | Publication Date |
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| CN107321917A true CN107321917A (en) | 2017-11-07 |
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| CN201710532102.1A Pending CN107321917A (en) | 2017-07-03 | 2017-07-03 | A kind of many material sand mold 3D printing manufacturing process |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160920A (en) * | 2018-01-23 | 2018-06-15 | 北京机科国创轻量化科学研究院有限公司 | A kind of novel sand mold（Core）3D printing manufacturing process |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
| CN108526397A (en) * | 2018-05-29 | 2018-09-14 | 周胜豪 | A kind of sand casting system with dispensing function |
| CN110116187A (en) * | 2018-11-28 | 2019-08-13 | 共享智能铸造产业创新中心有限公司 | The 3DP sand mold printing combined application method of binder |
| CN110340366A (en) * | 2019-07-10 | 2019-10-18 | 南京中科煜宸激光技术有限公司 | Sand mold supports the double gantry increasing material manufacturing equipments of combined type and Method of printing |
| CN110586848A (en) * | 2019-10-22 | 2019-12-20 | 康硕(德阳)智能制造有限公司 | Sand mold material for 3D printing cast steel, preparation method thereof and method for manufacturing cast steel sand mold by using material |
| CN110935843A (en) * | 2019-11-15 | 2020-03-31 | 北京机科国创轻量化科学研究院有限公司 | Casting sand mould subregion sanding flexible printing forming device with advanced sand discharging device |
| CN111168002A (en) * | 2019-12-31 | 2020-05-19 | 北京机科国创轻量化科学研究院有限公司 | Printing and cutting integrated forming method for large sand mold |
| CN112077262A (en) * | 2020-09-03 | 2020-12-15 | 北京机科国创轻量化科学研究院有限公司 | 3D printing forming method and device for freezing composite casting mold |
| CN112222358A (en) * | 2020-09-29 | 2021-01-15 | 北京机科国创轻量化科学研究院有限公司 | 3D prints forming device |
| CN112338140A (en) * | 2020-09-29 | 2021-02-09 | 北京机科国创轻量化科学研究院有限公司 | 3D printing forming method |
| CN114289685A (en) * | 2022-01-12 | 2022-04-08 | 南京航空航天大学 | Multi-material composite sand mold forming method and device |
| CN114453562A (en) * | 2022-03-03 | 2022-05-10 | 南京航空航天大学 | Hollow printing method for composite manufacturing of frozen sand mold and resin sand mold |
| CN114850417A (en) * | 2022-05-17 | 2022-08-05 | 南京航空航天大学 | Sand paving vibration compaction device for preparing multi-material composite sand mold |
| CN114922431A (en) * | 2022-03-31 | 2022-08-19 | 中国矿业大学 | Desert sand wind-proof wall 3D prints shower nozzle device |
| CN114918368A (en) * | 2022-05-24 | 2022-08-19 | 南京航空航天大学 | Multi-material mixed frozen sand mold classified recovery method and device |
| CN114918371A (en) * | 2022-05-20 | 2022-08-19 | 南京航空航天大学 | High-flexibility multi-region sanding method and device for multi-material sand mold printing |
| CN116352018A (en) * | 2023-02-09 | 2023-06-30 | 南京航空航天大学 | Gradient self-adaptive printing shape control method for multi-material composite sand mold |
| CN116493609A (en) * | 2023-03-10 | 2023-07-28 | 南京航空航天大学 | Combined sand mould additive manufacturing multi-material integrated sand paving device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160920A (en) * | 2018-01-23 | 2018-06-15 | 北京机科国创轻量化科学研究院有限公司 | A kind of novel sand mold（Core）3D printing manufacturing process |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
| CN108526397A (en) * | 2018-05-29 | 2018-09-14 | 周胜豪 | A kind of sand casting system with dispensing function |
| CN110116187A (en) * | 2018-11-28 | 2019-08-13 | 共享智能铸造产业创新中心有限公司 | The 3DP sand mold printing combined application method of binder |
| CN110340366A (en) * | 2019-07-10 | 2019-10-18 | 南京中科煜宸激光技术有限公司 | Sand mold supports the double gantry increasing material manufacturing equipments of combined type and Method of printing |
| CN110586848A (en) * | 2019-10-22 | 2019-12-20 | 康硕(德阳)智能制造有限公司 | Sand mold material for 3D printing cast steel, preparation method thereof and method for manufacturing cast steel sand mold by using material |
| CN110935843A (en) * | 2019-11-15 | 2020-03-31 | 北京机科国创轻量化科学研究院有限公司 | Casting sand mould subregion sanding flexible printing forming device with advanced sand discharging device |
| CN111168002A (en) * | 2019-12-31 | 2020-05-19 | 北京机科国创轻量化科学研究院有限公司 | Printing and cutting integrated forming method for large sand mold |
| CN112077262A (en) * | 2020-09-03 | 2020-12-15 | 北京机科国创轻量化科学研究院有限公司 | 3D printing forming method and device for freezing composite casting mold |
| CN112338140A (en) * | 2020-09-29 | 2021-02-09 | 北京机科国创轻量化科学研究院有限公司 | 3D printing forming method |
| CN112222358A (en) * | 2020-09-29 | 2021-01-15 | 北京机科国创轻量化科学研究院有限公司 | 3D prints forming device |
| CN114289685A (en) * | 2022-01-12 | 2022-04-08 | 南京航空航天大学 | Multi-material composite sand mold forming method and device |
| CN114453562A (en) * | 2022-03-03 | 2022-05-10 | 南京航空航天大学 | Hollow printing method for composite manufacturing of frozen sand mold and resin sand mold |
| CN114922431A (en) * | 2022-03-31 | 2022-08-19 | 中国矿业大学 | Desert sand wind-proof wall 3D prints shower nozzle device |
| CN114922431B (en) * | 2022-03-31 | 2023-02-24 | 中国矿业大学 | Desert sand windproof wall 3D prints shower nozzle device |
| CN114850417A (en) * | 2022-05-17 | 2022-08-05 | 南京航空航天大学 | Sand paving vibration compaction device for preparing multi-material composite sand mold |
| CN114918371A (en) * | 2022-05-20 | 2022-08-19 | 南京航空航天大学 | High-flexibility multi-region sanding method and device for multi-material sand mold printing |
| CN114918368A (en) * | 2022-05-24 | 2022-08-19 | 南京航空航天大学 | Multi-material mixed frozen sand mold classified recovery method and device |
| CN116352018A (en) * | 2023-02-09 | 2023-06-30 | 南京航空航天大学 | Gradient self-adaptive printing shape control method for multi-material composite sand mold |
| CN116352018B (en) * | 2023-02-09 | 2024-02-02 | 南京航空航天大学 | Gradient self-adaptive printing shape control method for multi-material composite sand mold |
| CN116493609A (en) * | 2023-03-10 | 2023-07-28 | 南京航空航天大学 | Combined sand mould additive manufacturing multi-material integrated sand paving device and method |
| CN116493609B (en) * | 2023-03-10 | 2023-10-31 | 南京航空航天大学 | Combined sand mould additive manufacturing multi-material integrated sand paving device and method |
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Application publication date: 20171107 |