CN102294437A - Water soluble core removing method and device - Google Patents
Water soluble core removing method and device Download PDFInfo
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- CN102294437A CN102294437A CN2011101536347A CN201110153634A CN102294437A CN 102294437 A CN102294437 A CN 102294437A CN 2011101536347 A CN2011101536347 A CN 2011101536347A CN 201110153634 A CN201110153634 A CN 201110153634A CN 102294437 A CN102294437 A CN 102294437A
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Abstract
A water soluble core removing method and a device thereof can effectively lower the load of water discharge treatment and the environment. A water soluble core (10) is damaged and removed from a casting (1) by water spraying (w). The method comprises a step in which crushing sheets (10a) of the water soluble core (10) are performed solid-liquid isolation before falling to the bottom of the device; and another step in which the solid-liquid separated crushing sheets (10a) are moved to the outside of the device immediately.
Description
Technical field
The present invention relates to a kind of method and employed device of removing of this method that the core, the especially water-soluble core that for example are used for aluminium alloy casting are removed after its casting.
Background technology
As the core that is used for aluminium alloy casting, exploitation has uses water-soluble water-soluble core after casting such as salt.In the past, for removing of the employed this water-soluble core of casting of aluminium alloy etc., known had a method (patent documentation 1, patent documentation 2) that is dipped in the water and makes the core dissolving.
Equally, thus also known have water-soluble core is immersed the method (patent documentation 3, patent documentation 4) that boiling water or warm water promote dissolving.
In addition, also developed a kind of like this method: this water-soluble core is not immersed water or warm water or dedicated liquid etc., and use water under high pressure (method that water or warm water or dedicated liquid etc. are under high pressure discharged).As the example of removing with water under high pressure, the known example that has patent documentation 5 to be put down in writing.
Patent documentation 1: Japanese Patent Publication 52-10803 communique
Patent documentation 2: TOHKEMY 2005-297709 communique
Patent documentation 3: Japanese kokai publication sho 50-136225 communique
Patent documentation 4: Japanese kokai publication sho 51-50218 communique
Patent documentation 5: TOHKEMY 2008-36702 communique
Invent problem to be solved
But, in the method that the water-soluble core dissolving is removed, contain core composition (water-soluble composition) by being immersed in the water etc. in the draining after the dissolving as described above, existing in the draining treatment facility load to become problem such as big.
In addition, as described in patent documentation 5, though the method for using water under high pressure that water-soluble core is removed also is effectively,, do not write the condition of water under high pressure etc. especially exactly.
Summary of the invention
In view of this problem, the object of the present invention is to provide a kind of method of removing and device that can effectively reduce for the water-soluble core of the load of draining processing and environment.
Be used to solve the means of problem
The method of removing of water-soluble core of the present invention is, by water spray, from foundry goods the water-soluble core fragmentation is removed, this method has following operation: before the flinders of injection water and described water-soluble core drops to bottom of device, make the operation of their mutual Separation of Solid and Liquid.
In addition, removing in the method for water-soluble core of the present invention, has following operation: the operation that the flinders after the Separation of Solid and Liquid is transplanted on immediately the device outside
In addition, the device of removing of water-soluble core of the present invention is, by water spray, from foundry goods, the water-soluble core fragmentation is removed, this is removed device and has the separation transfer unit, this separation transfer unit is located at the below of described foundry goods, with the mutual Separation of Solid and Liquid of the flinders of injection water and described water-soluble core, and the flinders after separating is transferred.
In addition, removing in the device of water-soluble core of the present invention, described separation transfer unit is made of the conveyer belt with eyed structure.
The effect of invention
Adopt the present invention, when from foundry goods, removing water-soluble core, the water-soluble core after the water under high pressure fragmentation can be trapped in core removes in the drainage path of device, even thirty years of age it move to outside the drainage path, thereby can reduce concentration or total meltage of the contained core composition of draining significantly, can effectively reduce load that draining handles, the load of environment such as rivers.
Description of drawings
Fig. 1 is the water-soluble core of expression example of the present invention and the sectional side view of foundry goods example thereof.
Fig. 2 is each sectional side view of removing operation of representing water-soluble core of the present invention successively.
Fig. 3 is that the core of expression water-soluble core of the present invention is removed the diagrammatic sketch of apparatus structure example.
Fig. 4 is that the core of expression water-soluble core of the present invention is removed the diagrammatic sketch of device variation.
Fig. 5 is that the core of expression water-soluble core of the present invention is removed the diagrammatic sketch of another variation of device.
Symbol description
1 cylinder head, 2 combustion chambers, 3 air entries, 4 exhaust outlets, 10 water-soluble cores
10a crushed material 200 cores are removed device 201 hydraulic sprays 202 frameworks 203 taper slides
204 outlets, 205 transfer devices, 206 conveyer belts, 207 returnable
208 draining storage parts, 209 filter screens, 210 drainpipes, 211 rhones
212 rotating cylinders, 213 drying devices, 214 drying ovens, 215 heating units
The specific embodiment
Below, the method for removing of water-soluble core of the present invention and the preferable example of device are described with reference to the accompanying drawings.
Among the present invention, use water-soluble core that foundry goods is cast, the water-soluble core that is cast in this foundry goods is removed after casting.Removing in the operation of water-soluble core after casting is not with water-soluble core dissolving fully from foundry goods (aluminium alloy), but utilizes water under high pressure to make its dissolving or pulverizing.
In the present invention, when water-soluble core is removed from foundry goods, make water-soluble core after the water under high pressure fragmentation not be trapped in core and remove in the drainage path of device, and it is moved to outside the drainage path immediately, can reduce concentration or total meltage of the contained core composition of draining.The following describes the method for removing of this water-soluble core and remove device, and the utilization again of the crushed material of the drying process of the crushed material of the core that is removed, the core that is removed is stated.In addition, so long as use the foundry goods of water-soluble core, the present invention also can be used for the foundry goods of aluminium alloy, kirsite, magnesium alloy etc.
In the present invention, preferably make water-soluble core be crushed to the degree of incomplete dissolving, pulverize, promote thus to pulverize with water under high pressure.
In this example, prepare a kind of like this core as water-soluble core: as basis, and add ceramic particle as strengthening composition with the salt-mixture of NaCl and KCL.Use this water-soluble core, carry out the aluminium die-cast, utilize water under high pressure to carry out core and remove.The following describes details.
The manufacturing of the water-soluble core of this example at first is described here.As water-soluble core, be that 50: 50 the salt-mixture of mol% carries out heating and melting as solute with 750 ℃ with NaCl: KCl.The ceramic particle of 20vol% is mixed with it, inject the core die for manufacturing, core moulding.In addition, in this example, be made as: use water-soluble core, the cylinder head of for example single-cylinder engine, especially its air inlet and exhaust outlet are cast.
Below, carry out the aluminium die-cast with the water-soluble core of making as described above.In this case, water-soluble core is remained on assigned position in the cylinder head mould that Hpdc uses, the material (ADCl2 aluminium alloy) of fusion is cast into the cylinder head shape with rated condition (the ejaculation casting pressure is that 58MPa, issuing velocity are 3.0m/sec).Fig. 1 is illustrated in the example of the cylinder head 1 of the foundry goods of conduct usefulness water-soluble core 10 castings in this example.For example, shown in this example, 2 both sides have air inlet 3 and exhaust outlet 4 to cylinder head 1 in the combustion chamber.Shown in oblique line, the corresponding position of air inlet 3 and exhaust outlet 4 configuration water-soluble core 10 (10A, 10B).
As mentioned above, carry out the aluminium die-cast with water-soluble core 10, and shown in Fig. 2 (a), casting cylinder head 1.After the casting, remove water-soluble core 10.In this case, adopt the water for industrial use of normal temperature, take out water-soluble core 10 by pressurized jet.Core described later is removed device and is had the hydraulic spray 201 shown in Fig. 2 (b), (c), from this hydraulic spray 201 to cylinder head 1 (water-soluble core 10) inject high pressure water w (water spray).
In these cases, the nozzle diameter of hydraulic spray 201 is set at fixing 1.6mm, and plus-pressure is made as 5,10,20,30,40,50Mpa, obtains the degradation rate of water-soluble core 10 separately.Water-soluble core 10 is made as L=100mm with the distance of hydraulic spray 201, and the injecting time of water under high pressure was made as 90 seconds.In addition, the degradation rate of water-soluble core 10 is represented the ratio of the core weight before undissolved core weight contained in the draining after core is removed is with respect to dissolving.In addition, observe the state that water under high pressure is directly injected to the position of aluminium casting, judge the faulted condition of this aluminium casting.Table 1 expression core is removed experimental result.
Table 1
Can confirm that from these experimental results will efficiently water-soluble core 10 be pulverized and remove, water under high pressure pressure is preferably more than the 10MPa, below the 40MPa.So long as the pressure of this scope under the effect of hydraulic pressure, can be pulverized core in dissolving.
On the other hand, can confirm this situation: though water under high pressure also can be removed water-soluble core 10 less than 10MPa, but pulverize rate variance, water-soluble core 10 most of dissolvings in this state.In addition, water under high pressure is when 45MPa is above, and being considered to has damage to aluminium casting.So can confirm: it is best removing water-soluble core 10,20～40MPa.
Below, the method that the core (not dissolving part) after explanation will be pulverized takes out.Comprise this method among the present invention: make that contained core crushed material is not trapped in the rhone in the draining behind the high-pressure water jet, or do not contact, remove outside the device and move it core with water.In this case, the transfer device of crushed material is preferably disposed on core and removes the interior or setting simultaneously of device.As transfer device, the conveyer belt of mesh quality etc. is preferable, contains under the situation of composition that salt etc. makes metal erosion at core, preferably uses the transfer device of being made by stainless steel material or resin material etc.
Here, in the device that utilizes water under high pressure etc. that water-soluble core is removed, the filtration members of screening or nonwoven etc. is set in the drainage path in front of rhone top or inside or rhone usually, core after being used for preventing to pulverize or solid content flow out.But wherein,, can produce dissolving so expect the crushed material of the water-soluble core from foundry goods, removed easily because the core after pulverizing always contacts with water (draining).Therefore, among the present invention, the crushed material of water-soluble core contained in the draining behind the high-pressure water jet is not trapped in rhone or the drainage path, or it is not contacted with water, remove outside the device and move to core immediately.Thus, the crushed material excessive dissolution of the water-soluble core of from foundry goods, removing can be prevented to make, the composition (reducing total meltage) of water-soluble core contained in the draining can be reduced.Its result can reduce draining processing load and the reduction carrying capacity of environment for the rivers on the ground of releasing.
Fig. 3 represents that core of the present invention removes the configuration example of device 200.Core is removed device 200 and contain the device member of formation in the framework 202 that has closed structure substantially.Assigned position in framework 200 maintains the cylinder head 1 as this routine workpiece, disposes hydraulic spray 201 accordingly with the water-soluble core 10 that should remove.As previously mentioned, from hydraulic spray 201 to water-soluble core 10 inject high pressure water w.Below cylinder head 1, be equipped with the such taper slide 203 that preferably tilts of diagram.In this case, the broken thing 10a of the water-soluble core 10 that breaks away from from cylinder head 1, drop on the taper slide 203 as the water and the solution (injection water) of water under high pressure w (water spray) injection, and these broken thing 10a and injection water move to outlet 204 naturally along taper slide 203, fall or put into transfer device described later from outlet 204 again.
In this example, as the transfer device of the crushed material 10a of the water-soluble core of being removed from foundry goods 10, adopt the belt load mode.Among Fig. 3, below outlet 204, be laid with the conveyer belt 206 that constitutes transfer device 205.Shown in the example, make following structure as shown: can use 1 or many conveyer belts 206 (206A, 206B), transfer crushed material 10a as shown by arrows like that, and final extension the in the end of conveyer belt 206 is located at the outside that core is removed device 200.Below, end at conveyer belt 206 (206B) disposes recoverer or returnable 207, and crushed material 10a drops in the returnable 207 from conveyer belt 206.
On the other hand, the bottom of removing device 200 at core is provided with draining storage part 208 (aqua storage tank), and the solution w ' that contains the core composition temporarily is stored in this draining storage part 208.As shown, the solution w ' in the draining storage part 208 is discharged to rhone 211 by the filter screen 209 of its bottom from drainpipe 210, and delivers to regulation place (treatment facility etc.).
In this transfer device 205,, use tape conveyor belt as means to separating with " undissolved crushed material " at " solution that contains the core composition " that dissolves, discharged when pulverizing with water under high pressure.In order effectively to separate, this tape conveyor belt is mesh fabric preferably, and this external core contains under the situation of composition that salt etc. makes metal erosion, preferably uses the conveyer belt of being made by stainless steel material or resin material.In " solution that contains the core composition " and " undissolved crushed material " on dropping to transfer device 205, solution sees through conveyer belt 206 and falls with maintaining the original state, and crushed material is transferred on conveyer belt 206.
Here, as mode to separating immediately at " solution that contains the core composition " that dissolves, discharged when pulverizing with water under high pressure and " undissolved crushed material ", except above-mentioned belt load mode, for example use rotating cylinder mode or centrifugation etc., also can obtain same effect.Fig. 4 represents another configuration example of transfer device 205.In this example, transfer device 205 is made of rotating cylinder 212.In this case, rotating cylinder 212 is made of the material of mesh quality, puts in the rotating cylinder 212 from " solution that contains the core composition " and " undissolved crushed material " that outlet 204 falls.Rotating cylinder 212 filters discharge while the solution that will rotate after will separating, and crushed material 10a is transplanted in the returnable 207.
In these cases, the transfer device 205 of the crushed material 10a of water-soluble core 10 preferably is located at core and removes in the device 200 or remove device 200 with core and be provided with simultaneously.Constitute by configuration like this, can improve operating efficiency, layout is oversimplified, and can realize that cost descends.
Next, to making method of not dissolving the core drying and device thereof after the taking-up constitute, utilize again and describe.Remove the processing of the outer undissolved core crushed material of device for being fetched into core, can consider discarded or utilization again.When carrying out waste treatment or utilizing again, be preferably in and carry out drying in advance.In the present invention, set up drying device, thereby can utilize continuous system to carry out removing the recovery to dissolved matter not, dry series of processes from core by the side of removing device at core is other.
Fig. 5 represents to contain system's configuration example of drying device.Under the situation that undissolved core crushed material is discarded, because this waste treatment is difficult under the state of moisture containing, so must make core crushed material drying.In addition, under situation about utilizing again, because containing under the state of moisture and can obstruction utilizing again, so must make core crushed material drying.That is to say that the core crushed material that is reclaimed in the taking-up operation to water-soluble core carries out drying then and there, in subsequent handling, just needn't carry out drying more so.
As shown in Figure 5, the other drying device 213 of setting up of side of one is set in the extension of transfer device 205, just can with continuous system carry out from core remove to reclaim, the operation of drying.Drying device 213 also can comprise for example drying oven 214 and the heating unit 215 that is provided in the drying oven 214 of tunnel type, can be at short notice with the crushed material 10a drying of being transferred by transfer device 205.Utilize this systematization, can improve operating efficiency, layout is oversimplified, can realize that cost descends.
In addition, Fig. 5 has illustrated to have the example of heating unit 215 as the tunnel type drying oven 214 of drying device 213, in addition also can obtain same effect with heated-air drying for example etc.
In addition, drying device 213, as long as its water proofing property, condition such as space is set meets the demands, drying device 213 also can be arranged on core and remove device 200 inside.
More than, the present invention and various example have been described, but the present invention is not limited in these examples, can do change etc. within the scope of the invention.
For example,, be illustrated, but, can use the present invention in fact in the same manner effectively with the situation of above-mentioned example for this type foundry goods with the cylinder head example as application of the present invention.
In addition, as the means of " solution that contains the core composition " that drops into from outlet 204 being separated with " undissolved crushed material ", crushed material being transferred, except above-mentioned situation, the handover passage that constitutes by mesh material that for example can be by laying that the slide unit shape tilts, this handovers passage is moderately vibrated, thereby constituted the separation transfer unit.
Claims (4)
1. the method for removing of a water-soluble core by water spray, is removed the water-soluble core fragmentation from foundry goods, it is characterized in that having following operation:
Before the flinders of injection water and described water-soluble core drops to bottom of device, make the operation of their mutual Separation of Solid and Liquid.
2. the method for removing of water-soluble core as claimed in claim 1 is characterized in that, also has the operation that the flinders after the Separation of Solid and Liquid is transplanted on immediately the device outside.
A water-soluble core remove device, by water spray, from foundry goods, the water-soluble core fragmentation is removed, it is characterized in that,
Have the separation transfer unit, this separation transfer unit is located at the below of described foundry goods, with the mutual Separation of Solid and Liquid of the flinders of injection water and described water-soluble core, and the flinders after separating is transferred.
Water-soluble core as claimed in claim 3 remove device, it is characterized in that described separation transfer unit is made of the conveyer belt with eyed structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-122731 | 2010-05-28 | ||
| JP2010122731A JP5510074B2 (en) | 2010-05-28 | 2010-05-28 | Method and apparatus for removing water-soluble core |
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| Publication Number | Publication Date |
|---|---|
| CN102294437A true CN102294437A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101536347A Pending CN102294437A (en) | 2010-05-28 | 2011-05-27 | Water soluble core removing method and device |
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| JP (1) | JP5510074B2 (en) |
| CN (1) | CN102294437A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493100A (en) * | 2014-12-25 | 2015-04-08 | 安徽省恒泰动力科技有限公司 | Washing device of casting water-soluble salt core |
| CN104624976A (en) * | 2013-11-14 | 2015-05-20 | 沈阳铸造研究所 | Method for forming slender pipeline having large length-to-diameter ratio for magnesium alloy casting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2727670A1 (en) | 2012-11-05 | 2014-05-07 | Bühler AG | Removal of the core from cast light metal components |
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| JP2004291017A (en) * | 2003-03-26 | 2004-10-21 | Sintokogio Ltd | Salt core for casting light-alloy casting, method for manufacturing salt core, and method for producing light-alloy casting |
| DE10342867A1 (en) * | 2003-09-15 | 2005-04-28 | Eurocopter Deutschland | Water soluble molding core formed from a water soluble material by filling it into a mould, hardening, applying a fibre material and core removal |
| JP4000106B2 (en) * | 2003-10-30 | 2007-10-31 | 本田技研工業株式会社 | Manufacturing method of salt core for casting |
| JP4403233B2 (en) * | 2004-06-22 | 2010-01-27 | 富山県 | Casting core manufacturing method |
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| US20060207742A1 (en) * | 2005-03-16 | 2006-09-21 | Oscar Garza-Ondarza | Method and apparatus for improved heat extraction from aluminum castings for directional solidification |
| JP2008036702A (en) * | 2006-08-10 | 2008-02-21 | Toyota Motor Corp | Casting mold for metal casting |
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2010
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| JPS62255104A (en) * | 1986-04-30 | 1987-11-06 | トヨタ自動車株式会社 | Core for injection molding |
| CN1048810A (en) * | 1989-12-23 | 1991-01-30 | 湖南省冶金规划设计院 | Gravity filter bed with moving band for slag and water separation |
| US5262100A (en) * | 1990-07-11 | 1993-11-16 | Advanced Plastics Partnership | Method of core removal from molded products |
| CN1199658A (en) * | 1997-04-19 | 1998-11-25 | 戴姆勒－奔驰公司 | Producing method for cavity substance |
| US20040195713A1 (en) * | 2001-08-24 | 2004-10-07 | Helge Hansel | Method and device for removing the core of water-soluble casting cores |
| JP2004291017A (en) * | 2003-03-26 | 2004-10-21 | Sintokogio Ltd | Salt core for casting light-alloy casting, method for manufacturing salt core, and method for producing light-alloy casting |
| DE10342867A1 (en) * | 2003-09-15 | 2005-04-28 | Eurocopter Deutschland | Water soluble molding core formed from a water soluble material by filling it into a mould, hardening, applying a fibre material and core removal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624976A (en) * | 2013-11-14 | 2015-05-20 | 沈阳铸造研究所 | Method for forming slender pipeline having large length-to-diameter ratio for magnesium alloy casting |
| CN104493100A (en) * | 2014-12-25 | 2015-04-08 | 安徽省恒泰动力科技有限公司 | Washing device of casting water-soluble salt core |
| CN104493100B (en) * | 2014-12-25 | 2016-12-07 | 安徽省恒泰动力科技有限公司 | A kind of flusher of casting water dissolved salt core |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5510074B2 (en) | 2014-06-04 |
| JP2011245530A (en) | 2011-12-08 |
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Application publication date: 20111228 |