CN106040987A - External reinforcement system of 3D printing mold core - Google Patents
External reinforcement system of 3D printing mold core Download PDFInfo
- Publication number
- CN106040987A CN106040987A CN201610566323.6A CN201610566323A CN106040987A CN 106040987 A CN106040987 A CN 106040987A CN 201610566323 A CN201610566323 A CN 201610566323A CN 106040987 A CN106040987 A CN 106040987A
- Authority
- CN
- China
- Prior art keywords
- sandbox
- negative pressure
- sand
- gas
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention applies to the field of 3D printing mold core casting production, and particularly relates to an external reinforcement system of a 3D printing mold core. The system comprises a double-layer sand box, a negative pressure system and gas blocking thin films, wherein the double-layer sand box comprises an inner box, a bottom plate, cushion blocks, an outer box and a top plate, the negative pressure system comprises a gas pumping connector, an electronic control regulating valve, a connecting pipe, a purification tank and a vacuum pump, and the gas blocking thin films include a plastic thin film covering the top of the sand box and a plastic thin film covering the periphery of the 3D mold core, and are used for preventing external gas and gas in the mold core from entering the sand box, so that a sealed state is formed inside the sand box, and a negative pressure state is formed when the negative pressure operates. With the external reinforcement system of the 3D printing mold core, the external strength of the 3D printing mold core is improved so that the 3D printing mold core can resist the buoyancy of molten iron; and because the used dry sand can be recycled, the production cost is greatly reduced, and the system can meet the requirements of the production processes of various castings.
Description
Technical field
The present invention is applied to 3D and prints core Foundry Production field, is specifically related to a kind of 3D and prints the external strengthening system of core
System.
Background technology
Along with popularization and the application of 3D printing technique, currently used 3D printing core carries out the method for Foundry Production and exists
In industry the most popular, its casting flow process includes that core prints, flow coat is dried, assembly of sand core and cast, finally gives required casting
Part.This technology need not use mould type, it is not necessary to considers the molding of traditional handicraft and removes material problem, can realize various labyrinth
The disposable high-precision printing of core, adds the motility of casting Technology Design method, has saved die manufacturing cost simultaneously,
It is very suitable for testpieces or the casting of small lot foundry goods；The cost printed due to 3D printing core is of a relatively high, beats for saving
It is printed as this, shortens printing interval simultaneously, it is intended that reduce 3D as far as possible and print the design volume of core, but in order to ensure that core has
Buoyancy in sufficient intensity opposing molten iron cavity filling process, this is accomplished by strengthening core periphery.Prior art majority uses
Being put into by the core being completed in steel sandbox, periphery carries out resin sand landfill, to obtain enough peripheral intensity, but this
Method is often difficult to find that the sandbox of coupling, so that consume substantial amounts of resin sand consumption, causes production cost to improve, it is impossible to
Meet the production needs of multi-assortment production.The patent documentation of such as Publication No. CN103658527A, discloses a kind of refrigerator cold
Hiding the vacuum sealed molding method of case adsorption mould mould cast, it uses resin sand, causes core strength inadequate, is easily deformed.
The most how to design a kind of cost that can reduce can strengthen again the system of core and become the problem that this area needs solution badly.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that a kind of 3D prints the external strengthening system of core, and this system makes
Instead of resin sand with dry sand, 3D can be improved simultaneously and print the external intensity of core, and dry sand used can be recycled, and produces into
Originally it is substantially reduced, meets the production process demand of multi items foundry goods.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is: a kind of 3D prints the external strengthening system of core
System, including: double-deck sandbox, described double-deck sandbox includes: interior case, base plate, cushion block, outer container and top board, and wherein, described interior case is half
Closed box, is connected by 1 lower boxboard and 4 side box plates and is formed, and described lower boxboard and side box plate surface are equipped with air discharge duct, its
Periphery is provided with sand net；Described base plate is positioned at described bottom portion, and described base plate is provided with multiple wrong with described lower boxboard air discharge duct
The aspirating hole of position；Described cushion block is positioned on described base plate, and its end face is connected with described interior bottom face, is used for carrying interior case；Institute
Stating outer container is to be connected, by 4 side box plates, the peripheral casing formed, and is used for being nested in described interior case, is provided with laterally reinforcement outside it
Muscle and waling；Described top board is positioned at described sandbox top, is used for sealing described interior case and outer container；Negative pressure system, described
Negative pressure system includes: air extraction connector, electric controlled regulating valve, connection pipeline, purification tank and vacuum pump, and wherein, described air extraction connector is solid
Surely being arranged on the sidewall of described purification tank, its one end is run through the sidewall of described purification tank and extends in purification tank, another
End connects with the aspirating hole on described interior box plate, described electric controlled regulating valve be located at described air extraction connector and described aspirating hole it
Between, it being used for monitoring described sandbox internal gas pressure, and regulate control atmospheric pressure value, described connection pipeline one end is connected with described purification tank
Connecing, the other end is connected with described vacuum pump, and for aerofluxus, described vacuum pump is positioned at system end, is used for extracting in described sandbox
Gas；Air blocking thin film, described air blocking thin film includes overlaying on sandbox top and the plastic sheeting of 3D core periphery, outside being used for intercepting
In boundary's gas and core, gas enters sandbox, makes sandbox be internally formed closed state, forms negative pressure shape when negative pressure system runs
State.
Inventor finds, this system according to embodiments of the present invention, uses dry sand to substitute resin sand, improves 3D and prints core
External intensity, be allowed to be enough to resist molten iron buoyancy, and dry sand used can be recycled, production cost is substantially reduced；The most double
Layer sandbox can make according to the casting mold overall size of maximum product, can meet the production process needs of multi items foundry goods；Simultaneously by
Greatly reducing in resin sand consumption, casting process casting mold gas forming amount reduces, and the pore class defect of foundry goods is obviously improved.
According to embodiments of the invention, described purification tank is tank, and for being separated by fuel gas and dust mixture, precipitation purifies
The gas that described negative pressure system is extracted out；Described purification tank also includes outlet, and it is positioned at the bottom of described purification tank, by by gas
The precipitation that body dust mixture separates is discharged.
According to embodiments of the invention, described interior case and outer container are welding and are formed, described cushion block and base plate, interior case and pad
Block, outer container and base plate, top board is with the connection of interior case, outer container and welds, it is preferred that for seamless full weld, be used for ensureing that it is overall
Sealing.
According to embodiments of the invention, the lower boxboard of described interior case and side box plate are 20mm steel plate, each steel plate 30%
Area arranges air discharge duct, and described sand net is wire quality, and its aperture is less than 40 mesh sand grains diameters, is riveted on outside described air discharge duct
Enclose.
According to embodiments of the invention, described base plate be thickness be the square plate of 80mm, its length and width size ratio is in described
Case is each goes out greatly 160mm, the uniform multiple aspirating holes in steel plate center, and preferably 3, in aspirating hole, car has screw thread, is used for docking described
Negative pressure system air extraction connector；Described cushion block is the square plate of high 80mm.
According to embodiments of the invention, described outer container is 20mm steel plate, and its overall size is identical with described base plate, and its
Both sides external is also arranged with 4 and hangs handle.
According to embodiments of the invention, described top board is the doughnut-shaped steel plate of thickness 20mm, and its internal ring size is identical with interior case,
Its outer shroud size is identical with outer container.
According to embodiments of the invention, described air extraction connector is got on the bus the screw thread supporting with aspirating hole, can screw in described in take out
Pore.
In another aspect of this invention, the invention provides a kind of method that described system carries out core strengthening, according to
Embodiments of the invention, comprise the steps: the dry silica sand of the capacity such as a. preparation and described double-deck sandbox, in advance by 3D core group
Merging is installed；B. uniform spreading bed load, the 3D core overlay film that will combine in described double-deck sandbox, and put in described sandbox,
Continue quicksand to be extremely completely covered by core, only expose flow inlet and position, gas outlet；C. one layer of institute is covered on dry sand surface, top
State plastic gas barrier thin film, continue back-up sand, pouring basin is set at flow inlet, for follow-up pouring practice；D. described negative pressure system is opened
System, after a period of time, controls described regulation valve, makes the Absolute truth reciprocal of duty cycle in described sandbox less than normal atmosphere；E. in negative pressure
Under power effect, the dry sand in described sandbox is tightened up by entirety, makes 3D core periphery intensity increase, now carries out pouring practice, treat
After casting complete, carry out the recession of pressurize a period of time from negative pressure.
According to embodiments of the invention, in described step a, described dry silica sand is 20-40 mesh；In described step b, institute
The height stating shop fixtures sand is 200mm；In described step c, sand-pack height is 100mm；In described step d, described Absolute truth
The reciprocal of duty cycle normal atmosphere less than 0.5 times；In described step e, the dwell time after described casting complete is 15min.
The present invention at least has the advantages that
(1) present invention uses dry sand to instead of resin sand, can improve 3D simultaneously and print the external intensity of core, be allowed to be enough to resist
Molten iron buoyancy；
(2) utilizing dry sand used by the method that this system uses can be recycled, production cost is substantially reduced；
(3) described double-deck sandbox can make according to the casting mold overall size of maximum product, can meet the production of multi items foundry goods
Journey needs；
(4) greatly reducing due to resin sand consumption, casting process casting mold gas forming amount reduces, and the pore class defect of foundry goods substantially changes
Kind.
Accompanying drawing explanation
Fig. 1 is the structural representation of double-deck sandbox.
Fig. 2 is base plate sectional view.
Fig. 3 is negative pressure system structural representation.
Wherein, base plate 1, cushion block 2, interior case 3, outer container 4, top board 5, cross reinforcing 6, waling 7, sand net 8, aerofluxus
Groove 9, aspirating hole 10, hang 11, double-deck sandbox 12, electric controlled regulating valve 13, purification tank 14, connect pipeline 15, vacuum pump 16, discharge
Mouth 17, air extraction connector 18.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.Unreceipted concrete technology or condition in embodiment, according to the skill described by the document in this area
Art or condition or carry out according to product description.
The invention provides a kind of 3D and print the external strengthening system of core, according to embodiments of the invention, Fig. 1 is double-deck
The structural representation of sandbox, Fig. 2 is base plate sectional view, and Fig. 3 is negative pressure system structural representation, with reference to Fig. 1, Fig. 2 and Fig. 3 institute
Showing, this system includes: double-deck sandbox 12, negative pressure system and air blocking thin film, and described double-deck sandbox includes: interior case 3, base plate 1, cushion block
2, outer container 4 and top board 5, wherein, described interior case is semiclosed casing, 1 lower boxboard and 4 side box plates connect and formed, described
Lower boxboard and side box plate surface are equipped with air discharge duct 9, and its periphery is provided with sand net 8；Described base plate is positioned at described bottom portion, described
Base plate is provided with multiple and the dislocation of described lower boxboard air discharge duct aspirating hole 10；Described cushion block is positioned on described base plate, and its top
Face is connected with described interior bottom face, is used for carrying interior case；Described outer container is to be connected, by 4 side box plates, the peripheral casing formed, and uses
In being nested on described interior case, outside it, it is provided with cross reinforcing 6 and waling 7；Described top board is positioned at described sandbox top
Portion, is used for sealing described interior case and outer container；Described negative pressure system includes: air extraction connector 18, electric controlled regulating valve 13, connection pipeline
15, purification tank 14 and vacuum pump 16, wherein, described air extraction connector is fixedly installed on the sidewall of described purification tank, and its one end is passed through
Wearing the sidewall of described purification tank and extend in purification tank, the other end connects with the aspirating hole on described interior box plate, described
Electric controlled regulating valve is located between described air extraction connector and described aspirating hole, is used for monitoring described sandbox internal gas pressure and regulating control gas
Pressure value；Described air blocking thin film includes overlaying on sandbox top and the plastic sheeting of 3D core periphery.
Inventor finds, this system according to embodiments of the present invention, uses dry sand to substitute resin sand, improves 3D and prints core
External intensity, be allowed to be enough to resist molten iron buoyancy, and dry sand used can be recycled, production cost is substantially reduced；The most double
Layer sandbox can make according to the casting mold overall size of maximum product, can meet the production process needs of multi items foundry goods；Simultaneously by
Greatly reducing in resin sand consumption, casting process casting mold gas forming amount reduces, and the pore class defect of foundry goods is obviously improved.
According to embodiments of the invention, with reference to shown in Fig. 3, the concrete kind of described connection pipeline is unrestricted, if energy
Enough playing connection scavenging action, described connection pipeline one end is connected with described purification tank, the other end and described vacuum pump
Connect, for aerofluxus.
According to embodiments of the invention, concrete kind and the unit type of described vacuum pump position are unrestricted, as long as can
Playing extraction gas effect, described vacuum pump is positioned at system end, for extracting the gas in described sandbox.
According to embodiments of the invention, the concrete kind of described air blocking thin film and material are unrestricted, can be polyethylene
Thin film, polypropylene film or polyvinylidene chloride film, according to some embodiments of the present invention, it is thin that the present invention is preferably polyethylene
Film, in being used for intercepting ambient atmos and core, gas enters sandbox, makes sandbox be internally formed closed state, when negative pressure system runs
Time formed negative pressure state.
According to embodiments of the invention, the concrete kind of described purification tank is unrestricted, can be the small-sized purification tank in front yard,
Sewage disposal purification tank or gas purification groove, according to some embodiments of the present invention, the present invention is preferably gas purification groove, more excellent
Choosing for tank, for being separated by fuel gas and dust mixture, precipitation purifies the gas that described negative pressure system is extracted out；Described purification tank
Also including outlet 17, it is positioned at the bottom of described purification tank, is discharged by the precipitation separated by fuel gas and dust mixture.
According to embodiments of the invention, with reference to shown in Fig. 1, described interior case and the making forming process of outer container and method are not subject to
Limiting, can be welding, rivet or engage formation, according to some embodiments of the present invention, the present invention preferably welds formation,
And described cushion block and base plate, interior case and cushion block, outer container and base plate, top board is with the connection of interior case, outer container and welds, more preferably
, for seamless full weld, it is used for ensureing the sealing of its entirety.
Described double-deck sandbox production order, for first to make described interior case, then makes described outer container, is welded by described cushion block
On described base plate, described cushion block end face welds described case, more described outer container nesting is sealed described case, finally will top
Plate is welded on the top of described case and outer container, fully seals, the most surplus flow inlet and position, gas outlet, it is simple to follow-up cast.
According to embodiments of the invention, the lower boxboard of described interior case and the concrete material kind of side box plate are unrestricted, can
Thinking irony, copper or steel, according to some embodiments of the present invention, the present invention is preferably 20mm steel plate, and each steel
The area of plate 30% arranges air discharge duct, and the concrete material kind of described sand net is unrestricted, can be iron wire, copper wire or steel wire,
According to some embodiments of the present invention, the present invention is preferably wire quality, its aperture be less than 40 mesh sand grains diameters, described sand net with
The concrete connected mode of described air discharge duct is unrestricted, can be welding, rivets or engage formation, according to some of the present invention
Embodiment, it is peripheral that the present invention is preferably riveted on described air discharge duct.
According to embodiments of the invention, shown in reference Fig. 1 and 2, described base plate and the concrete material kind of cushion block and shape
Unrestricted, material can be irony, aluminum matter or steel, and shape can be circular, square, taper or annular, according to this
Some bright embodiments, base plate of the present invention preferably thickness is the square plate of 80mm, and its length and width size is than described interior case
Each going out greatly 160mm, the uniform multiple aspirating holes in steel plate center, preferably 3, in aspirating hole, car has screw thread, docks institute for spiral
State negative pressure system air extraction connector；Described cushion block is preferably the square plate for high 80mm.
According to embodiments of the invention, the concrete material kind of described outer container is unrestricted, and material can be irony, copper
Matter, aluminum matter or steel, according to some embodiments of the present invention, the present invention is preferably 20mm steel plate, its overall size and institute
State base plate identical, and its both sides external is also arranged with 4 and hangs 11.
According to embodiments of the invention, the concrete material kind of described top board and shape are unrestricted, and material can be ferrum
Matter, copper, aluminum matter or steel, shape can be circular, square, taper or annular, according to some embodiments of the present invention, this
Invention is preferably the doughnut-shaped steel plate of thickness 20mm, and its internal ring size is identical with interior case, and its outer shroud size is identical with outer container.
According to embodiments of the invention, described air extraction connector is unrestricted with the concrete connected mode of aspirating hole, Ke Yiwei
Welding, riveting or spiral docking, according to some embodiments of the present invention, the present invention is preferably spiral docking, it is furthermore preferred that described
Air extraction connector is got on the bus the screw thread supporting with aspirating hole, can screw in described aspirating hole.
In another aspect of this invention, the invention provides a kind of method utilizing described system to carry out core strengthening,
According to embodiments of the invention, comprise the following steps:
A. the capacity dry silica sand of 20-40 purpose such as preparation and described double-deck sandbox, combines 3D core in advance and is installed.
B. the bed load of uniform spreading 200mm height in described double-deck sandbox, the 3D core combined is covered with described in be used for
In intercepting ambient atmos and core, gas enters sandbox and makes sandbox be internally formed the air blocking thin film of closed state, and puts into described
In sandbox, continue quicksand and extremely core is completely covered, only expose flow inlet and position, gas outlet.
According to embodiments of the invention, with reference to shown in Fig. 1, described double-deck sandbox includes interior case 3, base plate 1, cushion block 2, outer container
4 and top board 5, described interior case and the making forming process of outer container and method unrestricted, can be welding, riveting or engaging
Becoming, according to some embodiments of the present invention, the present invention preferably welds formation, and described cushion block and base plate, interior case and cushion block,
Outer container and base plate, top board is with the connection of interior case, outer container and welds, it is furthermore preferred that be seamless full weld, for ensureing its entirety
Sealing.
C. cover one layer of described plastic gas barrier thin film on dry sand surface, top, continue to fill out the dry sand that paving height is 100mm,
Pouring basin is set at flow inlet, for follow-up pouring practice.
According to embodiments of the invention, described air blocking thin film includes that the plastics overlaying on sandbox top and 3D core periphery are thin
Film, the concrete kind of described air blocking thin film and material are unrestricted, can be polyethylene film, polypropylene film or poly-inclined dichloro
Vinyl film, according to some embodiments of the present invention, the present invention is preferably polyethylene film, is used for intercepting ambient atmos and core
Interior gas enters sandbox, makes sandbox be internally formed closed state, forms negative pressure state when negative pressure system runs.
D. open described negative pressure system, after a period of time, control described regulation valve, make the Absolute truth reciprocal of duty cycle in described sandbox
Normal atmosphere less than 0.5 times.
E. under negative pressure effect, the dry sand in described sandbox is tightened up by entirety, makes 3D core periphery intensity increase, now
Carry out pouring practice, to be cast complete after, carry out pressurize 15min recession from negative pressure.
According to embodiments of the invention, described negative pressure system includes: air extraction connector 18, electric controlled regulating valve 13, connection pipeline
15, purification tank 14 and vacuum pump 16, wherein, described air extraction connector is fixedly installed on the sidewall of described purification tank, and its one end is passed through
Wearing the sidewall of described purification tank and extend in purification tank, the other end is connected with the aspirating hole on described interior box plate, described
Electric controlled regulating valve is located at the junction of described air extraction connector and described aspirating hole, is used for monitoring described sandbox internal gas pressure, and regulates
Control atmospheric pressure value；Described air blocking thin film includes overlaying on sandbox top and the plastic sheeting of 3D core periphery.
According to embodiments of the invention, with reference to shown in Fig. 3, the concrete kind of described connection pipeline is unrestricted, if energy
Enough playing connection scavenging action, described connection pipeline one end is connected with described purification tank, the other end and described vacuum pump
Connect, for aerofluxus.
According to embodiments of the invention, concrete kind and the unit type of described vacuum pump position are unrestricted, as long as can
Playing extraction gas effect, described vacuum pump is positioned at system end, for extracting the gas in described sandbox.
Inventor finds, this system according to embodiments of the present invention, uses dry sand to substitute resin sand, improves 3D and prints core
External intensity, be allowed to be enough to resist molten iron buoyancy, and dry sand used can be recycled, production cost is substantially reduced；The most double
Layer sandbox can make according to the casting mold overall size of maximum product, can meet the production process needs of multi items foundry goods；Simultaneously by
Greatly reducing in resin sand consumption, casting process casting mold gas forming amount reduces, and the pore class defect of foundry goods is obviously improved.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " concrete example " or " some examples " etc. means to combine this embodiment or the specific features of example description, knot
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can combine in any one or more embodiments or example in an appropriate manner.
In describing the invention, it is to be understood that term " on ", D score, "left", "right", " interior ", the instruction such as " outward "
Orientation or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description the present invention and simplification retouch
State rather than indicate or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.Additionally, term " first ", " second " are only used for describing purpose, and it is not understood that
For indicating or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ",
The feature of " second " can express or implicitly include one or more this feature.In describing the invention, unless
Being otherwise noted, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be a connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification, simultaneously for one of ordinary skill in the art, according to the think of of the application
Think, the most all will change.
Claims (10)
1. the external strengthening system of a 3D printing core, it is characterised in that including:
Double-deck sandbox, described double-deck sandbox includes: interior case, base plate, cushion block, outer container and top board, wherein,
Described interior case is semiclosed casing, 1 lower boxboard and 4 side box plates connect and formed, described lower boxboard and side box plate table
Face is equipped with air discharge duct, and its periphery is provided with sand net；
Described base plate is positioned at described bottom portion, and described base plate is provided with bleeding of multiple and described lower boxboard air discharge duct dislocation
Hole；
Described cushion block is positioned on described base plate, and its end face is connected with described interior bottom face, is used for carrying interior case；
Described outer container is to be connected, by 4 side box plates, the peripheral casing formed, and is used for being nested in described interior case, is provided with horizontal stroke outside it
To reinforcement and waling；
Described top board is positioned at described sandbox top, is used for sealing described interior case and outer container；
Negative pressure system, described negative pressure system includes: air extraction connector, electric controlled regulating valve, connection pipeline, purification tank and vacuum pump, its
In, described air extraction connector is fixedly installed on the sidewall of described purification tank, and its one end is run through the sidewall of described purification tank and extends
Entering in purification tank, the other end connects with the aspirating hole on described interior box plate, described electric controlled regulating valve be located at described in bleed and connect
Head and described aspirating hole between, be used for monitoring described sandbox internal gas pressure, and regulate control atmospheric pressure value, described connection pipeline one end with
Described purification tank is connected, and the other end is connected with described vacuum pump, and for aerofluxus, described vacuum pump is positioned at system end, is used for
Extract the gas in described sandbox；
Air blocking thin film, described air blocking thin film includes overlaying on sandbox top and the plastic sheeting of 3D core periphery, is used for intercepting the external world
In gas and core, gas enters sandbox, makes sandbox be internally formed closed state, forms negative pressure state when negative pressure system runs.
System the most according to claim 1, it is characterised in that described purification tank is tank, for mixing fuel gas and dust
Thing separates, and precipitation purifies the gas that described negative pressure system is extracted out；Described purification tank also includes outlet, and it is positioned at described purification tank
Bottom, discharged by precipitation that fuel gas and dust mixture is separated.
System the most according to claim 1, it is characterised in that described interior case and outer container are welding and are formed, described cushion block
With base plate, interior case and cushion block, outer container and base plate, top board is with the connection of interior case, outer container and welds, it is preferred that for seamless full weld,
For ensureing the sealing of its entirety.
System the most according to claim 1, it is characterised in that the lower boxboard of described interior case and side box plate are 20mm thickness steel
Plate, the area of each steel plate 30% arranges air discharge duct, and described sand net is wire quality, and its aperture is less than 40 mesh sand grains diameters, riveting
Peripheral at described air discharge duct.
System the most according to claim 1, it is characterised in that described base plate be thickness be the square plate of 80mm, it is long
Wide size is more each than described interior case goes out greatly 160mm, and the uniform multiple aspirating holes in steel plate center, preferably 3, in aspirating hole, car has spiral shell
Stricture of vagina, is used for docking described negative pressure system air extraction connector；Described cushion block is the square plate of high 80mm.
System the most according to claim 1, it is characterised in that described outer container is 20mm steel plate, its overall size and institute
State base plate identical, and its both sides external is also arranged with 4 and hangs handle.
System the most according to claim 1, it is characterised in that described top board is the doughnut-shaped steel plate of thickness 20mm, its internal ring
Size is identical with interior case, and its outer shroud size is identical with outer container.
System the most according to claim 1, it is characterised in that described air extraction connector is got on the bus the spiral shell supporting with aspirating hole
Stricture of vagina, can screw in described aspirating hole.
9. the method that the system utilized according to any one of claim 1-8 carries out core strengthening, it is characterised in that include
Following steps:
A. the dry silica sand of the capacity such as preparation and described double-deck sandbox, combines 3D core in advance and is installed；
B. uniform spreading bed load, the 3D core overlay film that will combine in described double-deck sandbox, and put in described sandbox, continue stream
Sand, to being completely covered by core, only exposes flow inlet and position, gas outlet；
C. cover one layer of described plastic gas barrier thin film on dry sand surface, top, continue back-up sand, pouring basin is set at flow inlet, for
Follow-up pouring practice；
D. open described negative pressure system, after a period of time, control described regulation valve, make the Absolute truth reciprocal of duty cycle in described sandbox be less than
Normal atmosphere；
E. under negative pressure effect, the dry sand in described sandbox is tightened up by entirety, makes 3D core periphery intensity increase, now carries out
Pouring practice, to be cast complete after, carry out the recession of pressurize a period of time from negative pressure.
Method the most according to claim 9, it is characterised in that in described step a, described dry silica sand is 20-40 mesh；
In described step b, the height of described shop fixtures sand is 200mm；In described step c, sand-pack height is 100mm；In described step
In rapid d, the described Absolute truth reciprocal of duty cycle normal atmosphere less than 0.5 times；Pressurize in described step e, after described casting complete
Time is 15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566323.6A CN106040987B (en) | 2016-07-19 | 2016-07-19 | A kind of external strengthening system of 3D printing core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566323.6A CN106040987B (en) | 2016-07-19 | 2016-07-19 | A kind of external strengthening system of 3D printing core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106040987A true CN106040987A (en) | 2016-10-26 |
| CN106040987B CN106040987B (en) | 2018-03-09 |
Family
ID=57187934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610566323.6A Active CN106040987B (en) | 2016-07-19 | 2016-07-19 | A kind of external strengthening system of 3D printing core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106040987B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940137A (en) * | 2019-04-29 | 2019-06-28 | 共享智能铸造产业创新中心有限公司 | A kind of taper tooling |
| CN114206523A (en) * | 2019-08-16 | 2022-03-18 | 罗伯特·博世有限公司 | Core for a housing of a valve and method for producing the core |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268100A (en) * | 2003-03-10 | 2004-09-30 | Toyota Motor Corp | Method for moulding cold box core |
| CN1846900A (en) * | 2006-04-24 | 2006-10-18 | 王兴雷 | Casting process of thin-wall pipe and spiral roller |
| CN102921897A (en) * | 2012-09-27 | 2013-02-13 | 贺秉祥 | Pouring production process used for automobile engine casting combined core |
| CN104707940A (en) * | 2015-03-17 | 2015-06-17 | 大连理工大学 | Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing |
| CN105328129A (en) * | 2015-10-30 | 2016-02-17 | 宁夏共享模具有限公司 | Reinforcing method for strength of sand core of 3D printing air cylinder cover |
| CN105689651A (en) * | 2016-02-02 | 2016-06-22 | 宁夏共享模具有限公司 | 3D printing sand core for core assembly |
| CN206047019U (en) * | 2016-07-19 | 2017-03-29 | 宁夏共享模具有限公司 | A kind of external strengthening system of 3D printing core |
-
2016
- 2016-07-19 CN CN201610566323.6A patent/CN106040987B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268100A (en) * | 2003-03-10 | 2004-09-30 | Toyota Motor Corp | Method for moulding cold box core |
| CN1846900A (en) * | 2006-04-24 | 2006-10-18 | 王兴雷 | Casting process of thin-wall pipe and spiral roller |
| CN102921897A (en) * | 2012-09-27 | 2013-02-13 | 贺秉祥 | Pouring production process used for automobile engine casting combined core |
| CN104707940A (en) * | 2015-03-17 | 2015-06-17 | 大连理工大学 | Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing |
| CN105328129A (en) * | 2015-10-30 | 2016-02-17 | 宁夏共享模具有限公司 | Reinforcing method for strength of sand core of 3D printing air cylinder cover |
| CN105689651A (en) * | 2016-02-02 | 2016-06-22 | 宁夏共享模具有限公司 | 3D printing sand core for core assembly |
| CN206047019U (en) * | 2016-07-19 | 2017-03-29 | 宁夏共享模具有限公司 | A kind of external strengthening system of 3D printing core |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940137A (en) * | 2019-04-29 | 2019-06-28 | 共享智能铸造产业创新中心有限公司 | A kind of taper tooling |
| CN114206523A (en) * | 2019-08-16 | 2022-03-18 | 罗伯特·博世有限公司 | Core for a housing of a valve and method for producing the core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106040987B (en) | 2018-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101780537B (en) | Method for casting low-alloy cast steel automobile axle housing through V-process technology | |
| CN102941333A (en) | Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method | |
| CN206047019U (en) | A kind of external strengthening system of 3D printing core | |
| CN104550716A (en) | V-method casting process | |
| CN201906797U (en) | Special sand box for V-process casting | |
| CN106040987A (en) | External reinforcement system of 3D printing mold core | |
| CN105414487A (en) | Large loam core fixing method | |
| CN105478667B (en) | A kind of production method of water-jacket typ exhaust manifold casting sand type | |
| CN103894550B (en) | Contiuum type copper alloy propeller hub Casting Equipment and special method thereof | |
| CN109746395A (en) | A kind of sand core structure being easy to depoling | |
| CN205834179U (en) | A kind of casting system of high performance spheroidal graphite cast-iron reel | |
| CN208661060U (en) | A kind of water-cooled dry ice pelletizer | |
| CN208067253U (en) | A kind of sand mold component of aluminum alloy oil pan casting | |
| CN108405807A (en) | A kind of the sand mold component and method of aluminum alloy oil pan casting | |
| CN203900447U (en) | Die for casting insert ring inner-cooling piston | |
| CN204867309U (en) | Casting multilayer is folded and is watered the gating system | |
| CN110014123B (en) | Casting method of hundred-ton-grade spent fuel storage and transportation integrated metal container | |
| CN104525869A (en) | A casting method of an ultrafine high-nickel-content air tube | |
| CN206794675U (en) | A kind of new dual-purpose filter of hourglass shape bilayer molten iron | |
| CN206316338U (en) | The full-automatic sand casting moulding machine cartridge sand export sealing structure of sand is penetrated up and down | |
| CN205834159U (en) | The material pipe assembly of the anti-roll gas of die casting machine and injection mold device | |
| CN106031947B (en) | A kind of water cooling layering face cold mold and its application | |
| CN104455099B (en) | Oil chamber shell assembly | |
| CN207840061U (en) | A kind of vertical-parting penetrates pressure foundry production line | |
| CN207900212U (en) | Hub mold cooling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171225 Address after: 750021 the Ningxia Hui Autonomous Region Yinchuan City Xixia district the Yellow River Road No. 330 Yinchuan economic and Technological Development Zone, medium and small business base science and technology building, office building Applicant after: Sharing intelligence Foundry Industry Innovation Center Co., Ltd. Address before: 750021 the Ningxia Hui Autonomous Region Yinchuan Xixia ningshuo No. 298 South Street Applicant before: Ningxia Kocel Pattern Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200225 Address after: 241200 Anhui city of Wuhu province Fanchang County Economic Development Zone Patentee after: Sharing intelligent Foundry Industry Innovation Center (Anhui) Co., Ltd Address before: 750021 the Ningxia Hui Autonomous Region Yinchuan City Xixia district the Yellow River Road No. 330 Yinchuan economic and Technological Development Zone, medium and small business base science and technology building, office building Patentee before: Sharing intelligence Foundry Industry Innovation Center Co., Ltd. |
|
| TR01 | Transfer of patent right |