CH684683A5 - Press main for a pressing device for sand molds. - Google Patents
Press main for a pressing device for sand molds. Download PDFInfo
- Publication number
- CH684683A5 CH684683A5 CH1638/91A CH163891A CH684683A5 CH 684683 A5 CH684683 A5 CH 684683A5 CH 1638/91 A CH1638/91 A CH 1638/91A CH 163891 A CH163891 A CH 163891A CH 684683 A5 CH684683 A5 CH 684683A5
- Authority
- CH
- Switzerland
- Prior art keywords
- press
- press head
- plate
- sand molds
- head according
- Prior art date
Links
- 239000004576 sand Substances 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/02—Compacting by pressing devices only
- B22C15/08—Compacting by pressing devices only involving pneumatic or hydraulic mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Soil Working Implements (AREA)
Description
1 1
CH 684 683 A5 CH 684 683 A5
2 2nd
Beschreibung description
Die Erfindung betrifft ein Presshaupt einer Pressvorrichtung für Sandformen mit gleichmässigem spezifischen Pressdruck. The invention relates to a press head of a press device for sand molds with a uniform specific press pressure.
Es sind starre Pressplatten bei einfachen Formmaschinen bekannt, die jedoch meist unbefriedigende Ergebnisse erzielen, weil im Bereich hoher Modellteile eine Überverdichtung erfolgt, während in den übrigen Zonen keine ausreichende Presskraft mehr zur Verfügung steht. Rigid press plates are known in simple molding machines, but they usually achieve unsatisfactory results because overcompaction occurs in the area of high model parts, while in the other zones there is no longer sufficient press force available.
Auch sind sog. Vielstempelpressen bekannt, die aus einer Vielzahl von nebeneinander angeordneten Hydraulik-Zylindern bestehen, die an den nach unten ausfahrenden Kolbenstangen Pressfüsse aufweisen, die insgesamt die ganze Formfläche bedek-ken. So-called multi-ram presses are also known, which consist of a plurality of hydraulic cylinders arranged next to one another, which have press feet on the downwardly extending piston rods, which cover the entire molding surface as a whole.
Dieses Verfahren ist sehr teuer, recht ver-schleissanfällig, und da es sich hierbei um eine Vielzahl von starren Pressplatten handelt, die aus konstruktiven Gründen eine gewisse Grösse nicht unterschreiten können, ist auch keine gleichmässige Verdichtung, besonders in den Randzonen, gewährleistet. This process is very expensive, very prone to wear, and since this involves a large number of rigid press plates, which for design reasons cannot be less than a certain size, no uniform compression is guaranteed, especially in the peripheral zones.
Aufgabe der vorliegenden Erfindung ist es, die aufgeführten Nachteile zu beseitigen. The object of the present invention is to eliminate the disadvantages listed.
Diese Aufgabe wird dadurch erreicht, dass in dem Presshaupt eine elastische Platte aus einem Werkstoff mit einer Härte von < 40 Shore A vorgesehen ist. This object is achieved in that an elastic plate made of a material with a hardness of <40 Shore A is provided in the press head.
Weitere vorteilhafte Ausgestaltungen ergeben sich aus den abhängigen Ansprüchen. Further advantageous configurations result from the dependent claims.
Anhand der Figur wird ein bevorgzugtes Ausführungsbeispiel näher erläutert. A preferred exemplary embodiment is explained in more detail with reference to the figure.
In Fig. 1 ist ein erfindungsgemässes Presshaupt einer Pressvorrichtung dargestellt. 1 shows a press head according to the invention of a press device.
Oberhalb einer Modelleinrichtung 1 mit aufgesetztem Formkasten 2 und Füllrahmen 3 ist ein vertikal durch Hydraulik-Zylinder 4 bewegbares Presshaupt 5 angeordnet. A press head 5, which can be moved vertically by hydraulic cylinders 4, is arranged above a model device 1 with a molded box 2 and a filling frame 3.
An dem Presshaupt 5 ist eine dicke Platte 6 aus einem elastischen Werkstoff z. B. mit einer Härte von < 40 Shore A befestigt. Bei Bedarf sind in dem Material Luftkammern 10 enthalten. An den vier Seitenflächen und an der Unterseite ist die elastische Platte 6 mit einer dehnbaren verschleissfesten Folie 11 versehen. On the press head 5 is a thick plate 6 made of an elastic material such. B. attached with a hardness of <40 Shore A. If necessary, air chambers 10 are contained in the material. On the four side surfaces and on the underside, the elastic plate 6 is provided with an expandable, wear-resistant film 11.
Wird nun das Presshaupt 5 durch den Zylinder 4 auf den Formsand 7 gedrückt, passt sich die elastische Platte 6 der unterschiedlichen Verdichtbarkeit des Sandes, hervorgerufen durch die unterschiedliche Kontur des Modells 1 soweit an, als auf jedem cm2 der Sandfläche, abzüglich der Randleiste 9, ein gleichmässiger spezifischer Pressdruck entsteht. Die dehnbare Schutzfolie 11 verhindert dabei Beschädigungen des hochelastischen Materials durch den Formsand, durch Fremdkörper im Sand und durch Reibung an den Seitenwänden der Pressplatte 9. If the press head 5 is pressed by the cylinder 4 onto the molding sand 7, the elastic plate 6 adapts to the different compressibility of the sand, caused by the different contour of the model 1, than on every cm2 of the sand surface, minus the edge strip 9, a uniform specific pressure is created. The stretchable protective film 11 prevents damage to the highly elastic material by the molding sand, by foreign bodies in the sand and by friction on the side walls of the press plate 9.
Da die Platte 6 aus einem elastischen Werkstoff (z.B. Gummi, Silikon usw.) besteht, wird sie im Bereich hoher Modellanteile «eingebeult» und an flachen Modellbereichen «ausgebeult». Since the plate 6 is made of an elastic material (e.g. rubber, silicone, etc.), it is "dented" in the area of high model proportions and "bulged" in flat model areas.
In manchen Fällen, insbesondere zur Verdichtung extrem hoher Modelle, sind im Bereiche dieser Modelle in der elastischen Platte einige Luftkammern enthalten, die eine örtliche Kompressibilität gewährleisten. In some cases, especially for the compression of extremely tall models, in the area of these models there are some air chambers in the elastic plate which ensure local compressibility.
In einer weiteren üblichen Ausführungsform wird nicht das Presshaupt 5 durch einen Zylinder 4 auf den Sand 7 gedrückt, sondern Formkasten 2, Modelleinrichtung 1, Füllrahmen 3 und Sand 7 werden durch untenliegende Presszylinder gegen ein oberhalb ortsfest angeordnetes Presshaupt gedrückt. In a further customary embodiment, the press head 5 is not pressed onto the sand 7 by a cylinder 4, but the molding box 2, model device 1, filling frame 3 and sand 7 are pressed against a press head arranged above by means of press cylinders located below.
Claims (5)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1638/91A CH684683A5 (en) | 1991-06-03 | 1991-06-03 | Press main for a pressing device for sand molds. |
| DE4213187A DE4213187A1 (en) | 1991-06-03 | 1992-04-22 | PRESSING DEVICE FOR SAND MOLDS |
| ES09200958A ES2063639B1 (en) | 1991-06-03 | 1992-05-08 | PRESSING DEVICE FOR SAND MOLDS. |
| FR9206048A FR2676945A1 (en) | 1991-06-03 | 1992-05-19 | PRESSING DEVICE FOR SAND MOLDS. |
| ITMI921212A IT1255459B (en) | 1991-06-03 | 1992-05-20 | COMPRESSION MOLDING DEVICE FOR GROUND FORMS |
| GB9211464A GB2256386B (en) | 1991-06-03 | 1992-05-29 | Pressing device for sand moulds |
| JP4141567A JPH06246392A (en) | 1991-06-03 | 1992-06-02 | Pressure device for sandmold compression |
| CN92104264.7A CN1067396A (en) | 1991-06-03 | 1992-06-03 | Pressing device for sand forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1638/91A CH684683A5 (en) | 1991-06-03 | 1991-06-03 | Press main for a pressing device for sand molds. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH684683A5 true CH684683A5 (en) | 1994-11-30 |
Family
ID=4215144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1638/91A CH684683A5 (en) | 1991-06-03 | 1991-06-03 | Press main for a pressing device for sand molds. |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPH06246392A (en) |
| CN (1) | CN1067396A (en) |
| CH (1) | CH684683A5 (en) |
| DE (1) | DE4213187A1 (en) |
| ES (1) | ES2063639B1 (en) |
| FR (1) | FR2676945A1 (en) |
| GB (1) | GB2256386B (en) |
| IT (1) | IT1255459B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050547C (en) * | 1994-03-24 | 2000-03-22 | 金属机械股份有限公司 | Method and apparatus for making sand mold |
| CN101204731B (en) * | 2006-12-18 | 2010-10-13 | 天水星火机床有限责任公司 | Meltpit latch type gas box device for investment moulding |
| CN102773420B (en) * | 2012-08-20 | 2016-01-20 | 机械科学研究总院先进制造技术研究中心 | A kind of assembling die formative method of sand mold |
| CN102794392B (en) * | 2012-08-20 | 2015-12-02 | 机械科学研究总院先进制造技术研究中心 | A kind of moulding mould based on fractal structure and formative method thereof |
| CN102773411B (en) * | 2012-08-20 | 2016-01-20 | 机械科学研究总院先进制造技术研究中心 | A kind of digitlization non-model sand mold extrusion forming method |
| CN109848376A (en) * | 2019-03-19 | 2019-06-07 | 芜湖诚拓汽车部件股份有限公司 | Auto parts and components casting model powder mould molding equipment |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE516911C (en) * | 1929-10-29 | 1931-01-28 | Walter Killmer | Elastic pressing device for molding machines |
| DE801574C (en) * | 1949-04-17 | 1951-01-11 | Johannes Wisser | Method and device for evenly compacting the sand in compression molding machines |
| DE883799C (en) * | 1951-07-06 | 1953-07-20 | Werner Dipl-Ing Schlegel | Method and device for compacting the molding sand in molding machines |
| CH382923A (en) * | 1961-01-03 | 1964-10-15 | William Taccone Russell | Process for compacting a granular material and machine for its implementation |
| BE634361A (en) * | 1962-07-02 | |||
| JPS50117544A (en) * | 1974-02-27 | 1975-09-13 | ||
| SU662240A2 (en) * | 1976-12-03 | 1979-05-15 | Всесоюзный Научно-Исследовательский Институт Литейного Машиностроения,Литейной Технологии И Автоматизации Литейного Производства | Press block |
| JPS55117544A (en) * | 1979-02-28 | 1980-09-09 | Toyota Motor Corp | Shaping machine for mold |
| SU1060298A1 (en) * | 1982-07-28 | 1983-12-15 | Minchenkov Aleksandr V | Apparatus for packing moulding sand |
-
1991
- 1991-06-03 CH CH1638/91A patent/CH684683A5/en not_active IP Right Cessation
-
1992
- 1992-04-22 DE DE4213187A patent/DE4213187A1/en not_active Ceased
- 1992-05-08 ES ES09200958A patent/ES2063639B1/en not_active Expired - Lifetime
- 1992-05-19 FR FR9206048A patent/FR2676945A1/en not_active Withdrawn
- 1992-05-20 IT ITMI921212A patent/IT1255459B/en active IP Right Grant
- 1992-05-29 GB GB9211464A patent/GB2256386B/en not_active Expired - Fee Related
- 1992-06-02 JP JP4141567A patent/JPH06246392A/en active Pending
- 1992-06-03 CN CN92104264.7A patent/CN1067396A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| ES2063639A2 (en) | 1995-01-01 |
| ES2063639B1 (en) | 1997-04-16 |
| GB9211464D0 (en) | 1992-07-15 |
| ES2063639R (en) | 1996-08-16 |
| JPH06246392A (en) | 1994-09-06 |
| ITMI921212A0 (en) | 1992-05-20 |
| FR2676945A1 (en) | 1992-12-04 |
| GB2256386A (en) | 1992-12-09 |
| CN1067396A (en) | 1992-12-30 |
| IT1255459B (en) | 1995-11-02 |
| ITMI921212A1 (en) | 1993-11-20 |
| GB2256386B (en) | 1995-01-11 |
| DE4213187A1 (en) | 1992-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |