CN107520409B - A kind of method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing - Google Patents
A kind of method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing Download PDFInfo
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- CN107520409B CN107520409B CN201710640961.2A CN201710640961A CN107520409B CN 107520409 B CN107520409 B CN 107520409B CN 201710640961 A CN201710640961 A CN 201710640961A CN 107520409 B CN107520409 B CN 107520409B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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Abstract
The present invention relates to a kind of method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing, the sand core is the 3D printing sand core of monoblock type, several cavities are equipped in sand core, unglued loose sand is stacked in cavity, each surface of the sand core opens up several clearance holes being connected to internal cavity, when removing the loose sand of sand core inner cavity, preliminary shake-out is carried out first: the loose sand of inner cavity being vibrated into discharge from each clearance hole respectively by way of vibration and carries out preliminary sand removal；Then it carries out fluid scouring sand removal: fluid being injected with certain flow rate to sand core inner cavity, and constantly changes influent stream and go out stream direction to change flow direction of the fluid in cavity, enable flow across and wash away the bore passages of sand core, cavity inner wall soft transition layer of sand is impacted by the release effect of washing away of fluid, the sand material fallen is rushed and is discharged with fluid.Method of the invention adds several clearance holes connecting with inner cavity, realizes the sand removal of monoblock type 3D printing sand core bore passages with fluid scouring sediment outflow by vibrating.
Description
Technical field
The present invention relates to the auxiliary sand removal technology field of 3D printing sand mold, in particular to a kind of monoblock types of 3D printing
The method for cleaning of the extra sand material in sand core inner cavity.
Background technique
3D printing brings revolutionary influence to conventionally manufactured field by increasing material manufacturing method, embodies in multiple fields
Powerful advantage.For example directly part of the printing with labyrinth, mold etc. can shorten the period, reduce research and development cost, it will
New world of the manufacturing belt into Flexible Production.But 3D printing technique mainly also rests on small lot research and development trial-production at present, or
Small lot customizes the stage, is also far from moving towards batch flexibility manufacture.To find out its cause, the influence in terms of in addition to cost and efficiency
Outside, main influence factor is exactly the removal difficulty that 3D integrally prints part excess stock there are one.
The 3D printing technique of mainstream can be divided into two kinds, and one is stacked in layers method, another kind is that powder is selectively hard
Change, including laser sintered, injection bonding etc..Using stacked in layers method print structure complexity part when usually require it is numerous
Support, outer surface support is easier to remove, but the support of internal cavity structure is often difficult to remove.In comparison, make
It does not need to support when carrying out components printing with powder selective sclerosing scheme, there are greater advantages.Casting 3D printing sand core is
Using such technical solution.
Casting 3D printing technique is that successively selective jet binder is printed to sand grains, and the selection of sand grains is from diameter
0.1mm (140 mesh) to diameter 0.4mm (40 mesh sand grains diameters are 0.38mm) is differed.When casting 3D printer work, every paving
One layer of sand grains, selectivity sprays a binder therewith, itself has certain frictional force between sand grains, gives again in sanding operation
Certain pressure is given, the degree of packing for being laid with sand grains is preferable.In addition the printer of single liquid material, sand grains can be premixed into catalysis at present
Agent, sandy mobile is poor, and after the completion of the printing of complicated sand core, the extra sand grains in internal passage can not be by simply toppling over
It removes.On the other hand, binder makes the sand grains of one layer of low hardenability of sand core surface adhesion, introduces in the interstitial diffusion of sand grains
The problem of sand core removing surface, keeps the cleaning of complicated sand core internal cavity more difficult.For this problem, currently mostly use
Mode is that sand core is split into muti-piece sand core, keeps internal passage also exposed, is cleared up using compressed air, after this method is brought
Continuous assembly operation, has also been introduced assembling deviation and gap problem, and 3D printing is made to lose the advantage of directly production complex parts.
The whole internal cleaning problem for printing complicated sand core is put up with herein proposes a solution.
Summary of the invention
It is of the invention for being not easy to inner cavity sand removal after the sand core structure entirety 3D printing of complicated inner cavity in the prior art
Problem provides a kind of method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing, to solve the clear of complicated inner cavity sand core
Sand problem.
The object of the present invention is achieved like this, a kind of cleaning side of the extra sand material of Integral sand in-core chamber of 3D printing
Method, the sand core are the 3D printing sand core of monoblock type, and several cavities are equipped in sand core, stack unglued loose sand in cavity,
Feature is being that each surface of the sand core opens up several clearance holes being connected to internal cavity, removes sand core inner cavity
When loose sand, preliminary shake-out is carried out first: the loose sand of inner cavity being vibrated from each clearance hole respectively by way of vibration and is discharged
Carry out preliminary sand removal；Then it carries out fluid scouring sand removal: fluid being injected with certain flow rate to sand core inner cavity, and constantly changes influent stream
The bore passages of sand core are enabled flow across and washed away, fluid is passed through to change flow direction of the fluid in cavity with stream direction out
Release effect impact cavity inner wall soft transition layer of sand is washed away, the sand material fallen is rushed and is discharged with fluid.
In the sweep-out method of sand core bore passages loose sand of the invention, closed internal passage originally is opened into several and table
The clearance hole of face connection, printing internal passage and extraneous connection, then make not to be bonded hardening in cavity by mode of vibration
Loose sand carry out preliminary sand removal from the discharge of each clearance hole respectively, effect of the internal passage after preliminary sand removal due to binder
There are also the surface depletion layers of one layer of certain hardening strength to need to remove on surface.This surface depletion layer sand bond is low, and has one
Determine thickness, thus will affect the surface quality of casting, dimensional accuracy and inner inclusion defect, so must remove.Through preliminary clear
Sand, inner passage have been got through, and in method of the invention, are cleared up using the fluid of movement internal passage surface, fluid
Have the characteristics that it is unsetting, can be all-pervasive, in channel flow when to wall surface formed rubbing action, by the mistake of surface adhesion
Layer is crossed to remove and transport.The fluid of movement can be the vias inner walls surface got through with the sand grains reason on the wall surface of peel adhesion
Sand grains be unilateral adherency, the fluid molecule of high speed directed movement will form percussion to sand grains, to gradually remove transition
Layer of sand, and be discharged with the fluid of flowing from outflow port.
Then suitable steel ball is poured into the cavity of preliminary sand removal, will simultaneously steel ball be enclosed in cavity, and be made by vibration
Steel ball hits the filtering layer of sand of the low hardening of cavity wall, gradually shoots down the sand of transition layer of sand, most afterwards through clearance hole discharge steel ball and
Loose sand completes the sand removal process of Integral sand in-core road cavity.
For the connection for being further easy to implement sand core internal channel and outer surface, the position of the sand core inner-cavity structure mutation
The clearance hole connecting with nearest surface is at least opened up, the structural mutation refers to the position that latus rectum size is mutated in sand core cavity
Or sand core cavity contour curvature has the position of mutation.In structure of the invention, sand core structure mutation position open up with recently
Complicated inner-cavity structure can be connected to by clearance hole with outside, in order to loose sand in cavity by the clearance hole of surface connection
Discharge.
For the closure convenient for clearance hole position in sediment outflow, the clearance hole is the straight hole being connected to neighbouring internal passage,
The sediment outflow bore dia is 4-50mm.Because the begin to rehearse position of sand hole of sand core belongs to originally in closed position, need to arrange after sand removal processing
Sand hole blocks reduction sand core original structure state, and in this structure, the clearance hole of straight hole structure, it is convenient to block, and close after blocking
Closing property is good.
For convenient for tentatively removing the loose sand in cavity, the preliminary shake-out process of shake-out specifically comprises the following steps:
The first step, 3D printing sand core is fixed on a vibration table, keep the one of sand core surface for having clearance hole downward, and make clearance hole
Keep sediment outflow unimpeded；Second step applies shake table to become and hands over vibration certain time, makes in the cavity being connected to downward clearance hole
Loose sand is gradually discharged；Third step, overturning sand core keep other sand core surfaces for having clearance hole or having opening downward, repeat the first step and
The sediment outflow process of second step；Continue to overturn the sediment outflow process that sand core repeats the first step and second step, until all has clearance hole
And until thering is the surface of opening to be discharged without loose sand after placing and vibrating downwards.
The preliminary sand removal method of this method realizes a kind of process vibrated and topple over loose sand in sediment outflow cavity, specifically: sand core
Vibrate sediment outflow during, unhardened extra sand grains, established due to the mantle friction of itself and the compacting operation of equipment compared with
For stable accumulation body, so that the mobility of sand grains itself can not be played.This can be broken by applying a body vibration to sand core
Kind stable accumulation body.Vibration is that sand grains moment is made to obtain high-speed motion to the practical function of sand grains, that is, obtains biggish acceleration,
According to Newton's second law, sand grains generates inertia force under own wt effect, so that it is detached from the rubbing action of other sand grains, and
Move to new position.Disengaging effect under this effect of vibration is the most prominent from the nearest sand grains performance of clearance hole, thus used
Property power effect under easily escape rubbing action, and mobility is obtained under self gravity, and from nearest downward clearance hole stream
Out, the surface sand grains nearest from clearance hole is gradually cleaned, while sand grain surface gradually inwardly elapses, and channel is gradually got through.Together
When under the action of vibration, sand grains can not establish taper accumulation under the action of mantle friction, and generation level transports row by sand grains
Level sand grains to be transported to quicksand mouth, to achieve the effect that remove the most extra sand grains of bore passages.
To further speed up sediment outflow speed, when sand core is vibrated with vibration platform, negative-pressure ward pipe is equipped with outside downward clearance hole
Road is for assisting sediment outflow.
Further, during preliminary shake-out, the vibration of sand core is that frequency is 1-31Hz, and amplitude should be less than 1mm's
Oscillation exchange.
It is not easy to be connected to internal passage to be too small convenient for clearance hole aperture, before preliminary shake-out, to close to each sand core
The loose sand at the clearance hole on surface and the position that is open carries out mechanical dredging.
During fluid scouring sand removal, at least one influent stream will be set in surface opening that the bore passages with sand core are connected to
For flowing piping connection, outflow port is connect with outflow conduit to flow for collecting out for mouth and at least one outflow port, flow inlet and influent stream
The sand material of fluid and discharge, while blocking other openings injects wash fluid to flow inlet with certain flow, to flow inlet with
Bore passages between outflow port carry out fluid scouring and wash away 3-after five minutes to wash away the transition layer of sand on cavity surface, switch
Outflow port, or switch flow inlet and outflow port simultaneously, to change fluid flow direction, continues to wash away 3-5 minutes, change fluid again
Flow direction, until each vias inner walls of sand core inner cavity, after fluid scouring sand removal, that completes inner cavity transition layer of sand washes away cleaning.It is logical
Above-mentioned fluid scouring process of the invention is crossed, the complete erosion of transition layer of sand on sand core internal cavity is fallen and is discharged with fluid.On
Fluid scouring process is stated, the sand core extremely complex for internal channel structure has a large amount of bending pipelines and fork, and fluid is herein
Flow regime in class pipeline can not be judged by experience.It is found by computer sim- ulation, stream of the fluid in complex passages
It is dynamic to have following several features: firstly, the shortest path from flow inlet to outflow port will establish main flood discharge channel, it is that path integral is long
Spend shortest channel, speed also highest, is best cleaning effect range；Secondly, in fork node assignment of traffic will occur for fluid,
Pressure reduction, pressure reduction size is related with sectional area ratio before and after bifurcation point, and each assignment of traffic that diverges is related with path length.Cause
This can establish the secondary flow zone of influence in the region close with main flood discharge passage length, claim time flood discharge channel, formed to wall surface
Enough rubbing actions；Vortex is commonly formed in the bulge-structure of primary and secondary flood discharge channel near field in third, although these vortexes do not have
Have and direct contribution is formed to the Radial Flow of fluid, but fluid motion speed is larger at the big centrifugation radius of vortex, i.e., closely
Fluid flow rate at wall surface is high, so also could be formed with the souring of effect, the above main flood discharge channel, secondary flood discharge channel and whirlpool
Stream area is the effective cleaning zone of influence.Different flow inlets and outflow port setting, the change of flow direction and the variation for starting the time
The different cleaning zones of influence will be established, so fluid scouring process of the invention can make by combining different flow through scenario
It clears up the zone of influence and covers all bore passages regions, realize the cleaning to internal all cavities.
To guarantee that the flow velocity of the flow of fluid preferentially selects the biggish cast gate of bore, riser, row when the flow inlet selects
Port or clearance hole are as flow inlet.
To further increase flush efficiency, it is mixed with the granule medium of volume of fluid 10-15% in the fluid, described
The partial size of granule medium is 2-4mm.
Further, the fluid is compressed air stream or the immiscible and nonreactive liquid of sand material and binder with sand core
Body, such as the coating of sand mold flow coat.
Detailed description of the invention
Fig. 1 is sand core structure (begun to rehearse sand hole) schematic diagram of the cast iron cylinder head of the 3D printing of monoblock type.
Fig. 2 to 4 is different influent streams and the fluid in stream direction flows to zone of influence schematic diagram out.
Wherein, 1 cast gate；2 gas vents；3 riser；4,5,6,7,8,9 clearance hole.
Specific embodiment
The Integral sand in-core chamber that the present invention will be described in detail by taking the whole 3D printing sand core of cast iron cylinder head casting as an example below
The method for cleaning of extra sand material.
It is as shown in Figure 1 the sand core structure of the cast iron cylinder head of printing 3D printing, the sand core is per se with pouring for casting
Mouth 1, gas vent 2 and riser 3.For the sediment outflow for being easy to implement the sand core after whole printing, whens Integral sand core structure designs, is also needed
Clearance hole 4, clearance hole 5, clearance hole 6, clearance hole 7, clearance hole 8, clearance hole 9, each clearance hole is also respectively set in other sides
It is straight hole and is connected to respectively with internal neighbouring internal passage, the cast iron cylinder head sand cores of castings internal passage of the present embodiment compares
It is narrow, and there are the position of structural mutation in cavity many places, and other structures mutation refers mainly to the mutation of the minimum latus rectum size of cavity
With the mutation of cavity Internal periphery face curvature, above structure mutable site is required to the clearance hole that setting is led directly to neighbouring surface, row
According to the size aperture of bore passages be 4-50mm when sand hole is arranged, inside clearance hole end with adjacent to the bore passages connecting
It is connected smoothly, complicated inner cavity can be further combined with fluid emulation software, and the sand body of simulation flowing in advance is in cavity
Interior flow regime is with the clearance hole at determining suitably begin to rehearse sand hole position and suitable quantity, suitable aperture.
The Integral sand cored structure with several clearance holes being arranged according to the above method passes through 3D sanding, selective dump spray
After 3D printing outlet, the sand of occupied space outside sand core is taken away or other works by sand suction pipe for the sand core of binder hardening
Tool shovel is walked, and exposes sand core integrally, and the cavity of sand core internal is full of unglued loose sand at this time.During preliminary shake-out,
The first step, 3D printing sand core is fixed on a vibration table, keep the one of sand core surface for having clearance hole downward, and make clearance hole
Keep sediment outflow unimpeded, it, can be in the non-row in sand core bottom when sand core is fixed on shaking table to guarantee the unimpeded of bright clearance hole
Support member is arranged in sand position, and clearance hole is prevented to be plugged, and for narrow clearance hole, first mechanical can dredge sediment outflow before vibration
Hole makes its normal quicksand under vibrational state；Second step, applying frequency to shake table is 1-3Hz, and amplitude should be less than the friendship of 1mm
Become vibration, time of vibration is no less than 10 seconds, and the loose sand in the cavity being connected to downward clearance hole is discharged gradually from clearance hole；The
Three steps, overturning sand core keep other sand core surfaces for having clearance hole or having opening downward, repeat the sediment outflow mistake of the first step and second step
Cheng Jinhang vibrates sediment outflow；Continue to overturn the sediment outflow process that sand core repeats the first step and second step, until it is all have clearance hole and
Until thering is the surface of opening to be discharged without loose sand after placing and vibrating downwards, preliminary sand removal process is completed.
After completing preliminary sand removal, during then carrying out fluid scouring sand removal, during sheet, according to cast iron cylinder head casting
Internal channel structure, by computer software before implementing, analog compression air emulates flowing in inner passage and washes away, point or less
Three fluid scouring implementation Process the present embodiment scour process, first as shown in Fig. 2, regarding cast gate 3 and riser 3 as flow inlet,
Exhaust outlet 2, clearance hole 9 and clearance hole block good other clearance holes and exhaust outlet, carry out fluid scouring respectively as outflow port,
Flow inlet is connect by influent stream pipeline with fluid tank, and influent stream pipeline is equipped with flow pump and flow valve, controls fluid stream
Speed is 10-30 meter per second, washes away desanding efficiency to improve, the branch line for adding granule medium is arranged on influent stream pipeline,
The granule medium that particle is 2-4mm is added into influent stream pipeline, particle is advisable with the ball with certain elasticity, so as not to it is right
Sand core causes seriously to damage, and additional amount is 10 ~ 50/second, and outflow port passes through outflow conduit connecting fluid collecting box, flushing time
It is 5 minutes, for the fluid zone of influence in scour process as shown in Fig. 2, wherein solid line indicates main flood discharge channel, dotted line indicates time flood discharge
Channel, " ", represent vortex；After 5 minutes wash away, the transition layer of sand of cleaning zone of influence inner passage is removed completely substantially,
Then switch outflow port, as shown in figure 3, outflow port is switched to clearance hole 5 and clearance hole 8, flow inlet is constant, blocks other rows
Sand hole and exhaust outlet continue to wash away 5 minutes；For switching outflow port to clearance hole 6 and clearance hole 7, flow inlet is constant, blocks it again
Its clearance hole and exhaust outlet continue to wash away 5 minutes.The sand core structure of the present embodiment, by above-mentioned fluid scouring process, in sand core
The complete erosion of transition layer of sand on portion's cavity is fallen and is discharged with fluid, realizes the cleaning to internal all cavities.
After completing above-mentioned inner cavity sand removal work, must reduction sand core structure do not open up the structure before clearance hole, by with sand core
It is firm that the corresponding sand material plug of material blocks each clearance hole, then carries out the casting techniques mistakes such as subsequent sand core flow coat, mould assembling
Journey.
Casting 3D is broken in the mechanical oscillation that use of above-mentioned Integral sand core bore passages sand removal method innovation of the invention
The accumulation balance for printing excess stock, makes sand grains recapture mobility, and using the transport effect of steel ball to inner cavity channel table face into
Row cleaning, has following clear superiority:
(1) vibratory equipment can carry out electrical control, realize automation cleaning, advantageously ensure that cleaning effect, and realize
Pipeline system operation；
(2) vibratory equipment control parameter is that programmable parameter, including vibration frequency, amplitude etc. are easily achieved sequencing control
System, process standardization and Flexible Production；
(3) foundry's common fluid such as compressed air may be selected in fluid media (medium), and coating etc. does not increase additional tubes of material
Reason；
(4) scale removal process is only applicable in the rubbing action of fluid and sand core, does not generate pollutant, and the sand grains cleaned out is recyclable
It recycles, it is environmentally protective；
(5) the cleaning removal that this programme solves the casting whole core internal process cavity excess stock of 3D printing complexity sand core is asked
Topic, enables the maximum performance of the advantage of 3D printing increasing material manufacturing.
Claims (10)
1. a kind of method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing, the sand core is the 3D printing sand of monoblock type
Core, sand core is interior to be equipped with several cavities, stacks unglued loose sand in cavity, which is characterized in that open on each surface of the sand core
If several clearance holes being connected to internal cavity, when removing the loose sand of sand core inner cavity, preliminary shake-out is carried out first: being passed through
The loose sand of inner cavity is vibrated discharge from each clearance hole respectively and carries out preliminary sand removal by the mode of vibration；Then it is clear to carry out fluid scouring
Sand: injecting fluid to sand core inner cavity with certain flow rate, and constantly changes influent stream and go out stream direction to change fluid in cavity
Flow direction, enables flow across and washes away the bore passages of sand core, impacts cavity inner wall soft by the release effect of washing away of fluid
Transition layer of sand rushes the sand material fallen and is discharged with fluid.
2. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 1, which is characterized in that
The position of the sand core inner-cavity structure mutation at least opens up the clearance hole connecting with nearest surface, and the structural mutation refers to sand
There is the position of mutation at the position or sand core cavity contour curvature that latus rectum size is mutated in core cavity road.
3. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 1, which is characterized in that
The clearance hole is the straight hole being connected to neighbouring internal passage, and the sediment outflow bore dia is 4-50mm.
4. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 1, which is characterized in that
Preliminary shake-out process specifically comprises the following steps: the first step, and 3D printing sand core is fixed on a vibration table, makes have clearance hole
One of sand core surface it is downward, and make clearance hole keep sediment outflow it is unimpeded；Second step applies shake table to become and hands over vibration certain
The loose sand in the cavity being connected to downward clearance hole is discharged gradually in time；Third step, overturning sand core make it is other have clearance hole or
There is the sand core surface of opening downward, repeats the sediment outflow process of the first step and second step；Continue to overturn sand core and repeats the first step and the
The sediment outflow process of two steps, until all surfaces for having clearance hole and having opening are arranged without loose sand after placing and vibrating downwards
Until out.
5. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 4, which is characterized in that
When sand core is with vibration platform vibration, negative-pressure ward pipeline is equipped with for assisting sediment outflow outside downward clearance hole.
6. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 1, which is characterized in that
During preliminary shake-out, the vibration of sand core is that frequency is 1-31Hz, and amplitude should be less than the oscillation exchange of 1mm.
7. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 1-6,
Be characterized in that, during fluid scouring sand removal, will be arranged in surface opening that the bore passages with sand core are connected at least one into
For flowing piping connection, outflow port is connect with outflow conduit, while blocking it for head piece and at least one outflow port, flow inlet and influent stream
It is open, and injects wash fluid to flow inlet with certain flow, flows to the bore passages between flow inlet and outflow port
Body washes away, and to wash away the transition layer of sand on cavity surface, washes away 3-after five minutes, switches outflow port, to change fluid flow direction, or it is same
When switching flow inlet and outflow port, continue to wash away 3-5 minutes, change fluid flow direction again, until in each channel of sand core inner cavity
For wall after fluid scouring sand removal, that completes inner cavity transition layer of sand washes away cleaning.
8. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 7, which is characterized in that
When the flow inlet selects, preferentially select the biggish cast gate of bore, riser, exhaust outlet or clearance hole as flow inlet.
9. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 7, which is characterized in that
The granule medium of volume of fluid 10-15% is mixed in the fluid, the partial size of the granule medium is 2-4mm.
10. the method for cleaning of the extra sand material of Integral sand in-core chamber of 3D printing according to claim 7, feature exist
In the fluid is compressed air stream or the immiscible and nonreactive liquid of sand material and binder with sand core.
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| CN108262447B (en) * | 2018-03-14 | 2024-04-19 | 共享智能装备(安徽)有限公司 | Integrated clean-up equipment of whole core surplus sand of 3D printing |
| CN108772780B (en) * | 2018-06-08 | 2023-05-23 | 太原理工大学 | Horizontal excitation polishing device and method for complex cavity of light alloy casting |
| CN108817326B (en) * | 2018-06-27 | 2020-06-05 | 共享智能铸造产业创新中心有限公司 | Cleaning device for 3D printing sand core and working method thereof |
| DE102019004122A1 (en) * | 2019-06-13 | 2020-12-17 | Loramendi, S.Coop. | Method and device for the production of 3-D molded parts by the layer build-up technique using a core cleaning station |
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| SU1071357A1 (en) * | 1982-09-06 | 1984-02-07 | Предприятие П/Я Р-6930 | Chill mould |
| CN101837427B (en) * | 2009-03-20 | 2012-02-01 | 北京隆源自动成型***有限公司 | Laser sintering sand, preparation method thereof, sand core and preparation method thereof |
| CN201728335U (en) * | 2010-05-27 | 2011-02-02 | 南通华东油压科技有限公司 | Sand core batch seam cleaning device |
| CN103008272B (en) * | 2012-11-27 | 2016-03-02 | 天长缸盖有限公司 | Micro-cleaning machine and the cleaning method of shaking of a kind of location jet flow |
| CN106424581B (en) * | 2016-10-27 | 2018-07-24 | 宁夏共享模具有限公司 | The sand removal structure of 3D printing sand core |
| CN106493294A (en) * | 2016-10-28 | 2017-03-15 | 宁夏共享模具有限公司 | Sand removal equipment for 3D printer |
| CN106825438B (en) * | 2017-03-13 | 2018-10-16 | 抚州市羊易铸业有限公司 | A kind of casting method of bevel housing |
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