CN102159343B - Device for carrying mold cores - Google Patents
Device for carrying mold cores Download PDFInfo
- Publication number
- CN102159343B CN102159343B CN200980128085.9A CN200980128085A CN102159343B CN 102159343 B CN102159343 B CN 102159343B CN 200980128085 A CN200980128085 A CN 200980128085A CN 102159343 B CN102159343 B CN 102159343B
- Authority
- CN
- China
- Prior art keywords
- holding tube
- core rod
- attenuated
- column part
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Coating Apparatus (AREA)
Abstract
In metallic components used in mechanical engineering design, particularly in motors, pumps, compressors or power plant systems, and which are manufactured using known casting and injection molding methods, it is frequently required that cavities be provided in cast or injection molded parts, for example channels for cooling media or lubricants. Furthermore, the shaping of a cast or injection molded part by undercutting can be hindered. In both cases, soluble mold cores are particularly suitable as placeholders of such cavities. As a device for self-supporting placement of a core in the mold of a casting device, said core able to be dissolved by a liquid solvent, the invention proposes that the device is a supporting tube (3), that the at least one supporting tube (3) has a reduced cylindrical part (5) and that this part (5) inserts into the mold core (1) and holds the mold core.
Description
technical field
The present invention relates to for the device being fixedly installed the core rod that can be dissolved by liquid flux single-ended in the mold of casting equipment.
background technology
That use in motor, pump, compressor or power station plant especially in machine-building and in the metal parts manufactured by known casting and spray to cast method, frequent needs arrange cavity in casting or spray to cast part, such as, for the passage of cooling medium or lubricant.In addition, casting or spray to cast part are shaped may be hindered by slottings.In both cases, so-called disengaging core rod is particularly suitable for as the occupying device of respective cavities, and it is a kind of soluble core rod, by liquid flux solubilized.Because this core rod can not touch from outside due to its position in cast parts or spray to cast part, so it is developed from set cavity by the perforate provided in cast parts or spray to cast part for this reason.Particularly preferably this core rod water-soluble sand of flocking together or salt manufacture.Such core rod also can use when spray to cast plastic part.
The such as difficult point of the known cooling duct be formed in the piston of internal combustion engine.There must being shaping annular cooling channel and the core rod that arranges unsupportedly keeps in a cavity, and this cavity is full of with solution completely.
This solution is proposed in DE 10131725 B4.This core rod keeps in position given in advance under power effect on the casting mould core of casting equipment, and this power effect is here produced by vacuum or magnetic.When being fixed by magnetic, the material that can be magnetized must be mixed in core material.But this material must be removed to noresidue, and do not allow to react with cast material.
By must ensure during vacuum sucking-off can not sucking-off solution.From DE 4238851 A1, know a kind of device for fixing salt core rod for the cooling duct that is shaped in piston, wherein salt core rod is fixed on the half movable mold of crystallizer by keeping bar, and described maintenance bar self is stuck on a ram.This solution structure expense is large.
summary of the invention
Task of the present invention be to provide a kind of structure simple, for the mechanical device being fixedly installed the core rod dissolved by liquid flux single-ended in the mold of casting equipment.
This task is solved by the feature of the characteristic of the first claim.Favourable remodeling of the present invention provides in the dependent claims.
As of the present invention for the device being fixedly installed the core rod dissolved by liquid flux single-ended in the mold of casting equipment, there is the holding tube be for this reason shaped specially.Core rod is inserted in one end of this holding tube, and another part such as another core rod of mold is watered in other end insertion crystallizer wall or insertion.Then this core rod is kept by one or more holding tube.According to the present invention, holding tube has the cross section less than the end inserted in the other parts of watering mold at the end of insert molding in-core.Form is that this device of holding tube has such advantage, is namely particularly useful for the core rod with little cross section.Such core rod is such as annular core rod, and it is such as the shaping of the cooling duct in the piston of piston particularly at internal combustion engine.
The size of the core rod that the size of holding tube of the present invention will support depending on it.This holding tube can have the total length between 10mm to 30mm, and wherein the length of taper portion is between 3mm to 7mm.The maximum gauge of holding tube can depending on leading to the inlet tube of cavity set in cast parts and the diameter of discharge pipe, between 3mm to 20mm.The column part attenuated of holding tube has the diameter between 2mm to 5mm.Wall thickness is between 0.1mm to 0.6mm.In the column part that it attenuates, holding tube can have a longitudinal cut or two relative longitudinal cuts, and these longitudinal cuts are in length and diametrically match, and can have the width between length between 1.5mm to 4mm and 1mm to 1.5mm.
The material of holding tube depending on the material of solution, its should as far as possible with it reaction cause impact to keep function.The material of holding tube can be such as V2A steel.
Holding tube is inserted on another pipe usually, or inserts in the perforate of a part of mold.Usually this pipe or perforate provide the path passing to core rod, make after casting or spray to cast, when work hardening, are opened, to produce the path passing to core rod by this pipe or perforate keeping pipe bit.Then dissolved the liquid of core rod by this perforate supply, and lysed core rod is developed.
Negative pressure can be applied in holding tube, the exhaust of core rod can be supported thus during casting and spray to cast process.By the otch in the column part attenuated of holding tube, the area of the perforate of holding tube is exaggerated, and supports exhaust thus.This negative pressure is consistent with core rod composition.When salt core rod, this negative pressure is such as 0.2 bar.
The present invention is described in detail according to an embodiment.Each accompanying drawing is all drawn with the ratio of amplifying, wherein,
accompanying drawing explanation
Fig. 1 represents the side view of the view with its cross section of the salt core rod for annular cooling channel of a band holding tube,
Fig. 2 represents the top view of the prolongation running-on of the salt core rod of band holding tube, and
Fig. 3 represents the side view of holding tube, and its part is broken away.
detailed description of the invention
The present embodiment represents for the single-ended device of salt core rod arranging annular regularly, and it is such as the shaping of the cooling duct in the piston of piston particularly internal combustion engine.
Because the import of cooling duct and outlet converge, usually so annular core rod is supported on the downside of it on the downside of it.These core rods can be formed the prolongation running-on of alms bowl shape, in it, insert holding tube.These prolongation running-ons indicate import and the outlet of cooling duct simultaneously.Due to piston wall thickness, these prolongation running-ons do not allow the cross section significantly exceeding cooling duct.On the other hand, the wall thickness of prolongation running-on must even as big as providing the support of needs to holding tube, and wall can not peel off when injecting especially.Particularly hard core rod is perishable.
By the shape that it attenuates, holding tube has such advantage, and namely the prolongation running-on of core rod significantly can exceed its cross section scarcely, and however still retains enough wall thickness, to provide the support of needs to holding tube, can support thus and keep core rod.This is favourable when salt core rod especially.The non-circular cross-section that annular cooling channel in piston such as can have the external diameter of 75mm and 9mm height and 4mm wide.
Fig. 1 represents that the annular core rod 1 of a cooling duct for piston is the view with cross section 2 of salt core rod in this example, and this core rod has a holding tube 3 inserted.This cross section through the prolongation running-on 4 of an alms bowl shape in centre, is inserted the column part 5 attenuated of holding tube 3 and keeps core rod 1 in prolongation running-on.The prolongation running-on 4 of core rod 1 indicates the entrance and exit of circular passage in piston, and is the position of the cavity of the circular passage for removing core rod 1 utilizing holding tube 3 to get out will to be formed.It stretches out several millimeters in the downside of core rod 3.
The undeformed part 6 be connected with the column part 5 attenuated of holding tube 3 can be inserted another with its one end (not shown) and to manage or in the wall of a crystallizer or another core rod.The column part 5 attenuated of holding tube 3 has two lengthwises and the otch 7 extended in parallel.They amplify the cross-sectional area of tap 8 when core rod 1 may produce exhaust.
Fig. 2 represents the top view of the prolongation running-on 4 with the holding tube 3 inserted.Obviously find out, due to the cross section of the reduction of the column part 5 attenuated of holding tube 3, prolongation running-on 4 does not significantly exceed the excircle of core rod 1, thus can not weaken the intensity of the wall of piston in its region, cooling duct.
Fig. 3 illustrates the example of holding tube 3 of the present invention with the side view of cross-section.Its total length 9 is 18mm, and the length of taper portion 10 is 6mm, and wherein the length 11 of the column part 5 attenuated of insert molding in-core is 4mm.There is the tapered segment 12 that 2mm is long therebetween.The column part 5 attenuated arranges the parallel otch 7 of two 2.5mm long 13 and 1.5mm wide 14.The diameter 15 of the undeformed part 6 of holding tube 3 is 4mm, and the diameter 16 of the column part 5 attenuated is 3mm.Wall thickness 17 is 0.6mm.The material of holding tube 3 is V2A steel.
Claims (12)
1. one kind arranges for single-ended in the mold of casting equipment the device of core rod dissolved by liquid flux regularly, it is characterized in that, this device is at least a holding tube (3), this holding tube (3) has a column part attenuated (5), this column part attenuated (5) to insert in the core rod (1) that will keep and keeps this core rod, holding tube (3) overlapping with the axis of the column part attenuated (5) with the axis of the undeformed part (6) that the column part attenuated (5) connects also is parallel to the periphery of core rod (1).
2. device according to claim 1, is characterized in that, the column part (5) attenuated of holding tube (3) and the consistent size of core rod.
3. device according to claim 1 and 2, is characterized in that, holding tube (3) is inserted in the prolongation running-on (4) of the core rod (1) that will keep.
4. device according to claim 1, is characterized in that, holding tube (3) indicates path, and this path passes to the cavity needing to be formed by core rod (1).
5. device according to claim 1, is characterized in that, holding tube (3) indicates perforate, via this perforate flushable go out by the core rod dissolved.
6. device according to claim 1, is characterized in that, holding tube (3) is arranged in the downside of core rod (1).
7. device according to claim 1, is characterized in that, the column part (5) attenuated of holding tube (3) has at least one otch.
8. device according to claim 7, is characterized in that, the column part (5) attenuated of holding tube (3) has the otch (7) that two parallel longitudinal directions are arranged.
9. device according to claim 1, it is characterized in that, holding tube (3) has the total length (9) between 10mm to 30mm, the length of taper portion (10) is between 3mm to 7mm, the diameter (15) of non-crushed element (6) is between 3mm to 20mm, the diameter (16) of the column part (5) attenuated is between 2mm to 5mm, and wall thickness is between 0.1mm to 0.6mm.
10. device according to claim 7, it is characterized in that, at least one otch (7) in the column part (5) attenuated of holding tube (3) has the width between length between 1.5mm to 4mm and 0.5mm to 1.5mm.
11. devices according to claim 1, is characterized in that, holding tube (3) can be inserted in annular core rod (1).
12. devices according to claim 1, is characterized in that, holding tube (3) can be inserted in salt core rod (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008040507.8 | 2008-07-17 | ||
| DE102008040507A DE102008040507A1 (en) | 2008-07-17 | 2008-07-17 | Device for carrying cores |
| PCT/EP2009/058276 WO2010006925A1 (en) | 2008-07-17 | 2009-07-01 | Device for carrying cores |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102159343A CN102159343A (en) | 2011-08-17 |
| CN102159343B true CN102159343B (en) | 2015-03-25 |
Family
ID=41131761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980128085.9A Expired - Fee Related CN102159343B (en) | 2008-07-17 | 2009-07-01 | Device for carrying mold cores |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP2313219B1 (en) |
| CN (1) | CN102159343B (en) |
| BR (1) | BRPI0915999A2 (en) |
| DE (1) | DE102008040507A1 (en) |
| MX (1) | MX2011000504A (en) |
| PL (1) | PL2313219T3 (en) |
| RU (1) | RU2502580C2 (en) |
| WO (1) | WO2010006925A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010002999A1 (en) * | 2010-03-18 | 2011-09-22 | Maxicore Gmbh | Producing casting piece with cavity, comprises producing core soluble by liquid solvent with hole to receive retaining pin, fastening first end of the pin into the hole, and fastening second end of the pin to casting mold of casting device |
| DE102011086411A1 (en) * | 2011-11-15 | 2013-05-16 | Mahle International Gmbh | Mold for a piston |
| CN102728789A (en) * | 2012-07-24 | 2012-10-17 | 湖南江滨机器（集团）有限责任公司 | Hot molding method and preheating method for piston mold |
| GB202113798D0 (en) | 2021-09-27 | 2021-11-10 | Univ Tartu | Microfluidics method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1250605B (en) * | 1964-10-14 | 1967-09-21 | Karl Schmidt Ges Mit Beschraen | Device for the self-supporting fastening of core parts pressed from sand or salt |
| CN1106324A (en) * | 1994-02-07 | 1995-08-09 | 北京粉末冶金研究所 | injection moulding method for metal chamber type products |
| JP2006102750A (en) * | 2004-09-30 | 2006-04-20 | Mazda Motor Corp | Chaplet and structure for fitting chaplet to core |
| JP4068918B2 (en) * | 2002-08-01 | 2008-03-26 | 本田技研工業株式会社 | Keren used on the core |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4238851A1 (en) | 1992-11-18 | 1994-05-19 | Kolbenschmidt Ag | Salt core for aluminium@ alloy piston mould - fixed in position by mounting pins locating in movable mould half |
| RU2098229C1 (en) * | 1995-06-29 | 1997-12-10 | Георгий Петрович Савин | Plunger chill mould |
| JP3548369B2 (en) * | 1997-02-17 | 2004-07-28 | 株式会社日立ユニシアオートモティブ | Internal combustion engine piston |
| DE10131725B4 (en) | 2001-06-29 | 2004-02-12 | Ks Kolbenschmidt Gmbh | Salt core held under force in the casting device |
-
2008
- 2008-07-17 DE DE102008040507A patent/DE102008040507A1/en not_active Withdrawn
-
2009
- 2009-07-01 RU RU2011105722/02A patent/RU2502580C2/en not_active IP Right Cessation
- 2009-07-01 PL PL09780067T patent/PL2313219T3/en unknown
- 2009-07-01 WO PCT/EP2009/058276 patent/WO2010006925A1/en active Application Filing
- 2009-07-01 MX MX2011000504A patent/MX2011000504A/en active IP Right Grant
- 2009-07-01 BR BRPI0915999-1A patent/BRPI0915999A2/en not_active IP Right Cessation
- 2009-07-01 CN CN200980128085.9A patent/CN102159343B/en not_active Expired - Fee Related
- 2009-07-01 EP EP09780067.6A patent/EP2313219B1/en not_active Not-in-force
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1250605B (en) * | 1964-10-14 | 1967-09-21 | Karl Schmidt Ges Mit Beschraen | Device for the self-supporting fastening of core parts pressed from sand or salt |
| GB1118195A (en) * | 1964-10-14 | 1968-06-26 | Schmidt Gmbh Karl | Improvements in or relating to the support of core parts |
| CN1106324A (en) * | 1994-02-07 | 1995-08-09 | 北京粉末冶金研究所 | injection moulding method for metal chamber type products |
| JP4068918B2 (en) * | 2002-08-01 | 2008-03-26 | 本田技研工業株式会社 | Keren used on the core |
| JP2006102750A (en) * | 2004-09-30 | 2006-04-20 | Mazda Motor Corp | Chaplet and structure for fitting chaplet to core |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008040507A1 (en) | 2010-01-21 |
| EP2313219A1 (en) | 2011-04-27 |
| RU2502580C2 (en) | 2013-12-27 |
| WO2010006925A1 (en) | 2010-01-21 |
| RU2011105722A (en) | 2012-08-27 |
| MX2011000504A (en) | 2011-04-21 |
| PL2313219T3 (en) | 2014-04-30 |
| EP2313219B1 (en) | 2013-09-25 |
| CN102159343A (en) | 2011-08-17 |
| BRPI0915999A2 (en) | 2019-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20170701 |