EP0051302A1 - Formkasten für das Vakuumformverfahren - Google Patents

Formkasten für das Vakuumformverfahren Download PDF

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Publication number
EP0051302A1
EP0051302A1 EP81109383A EP81109383A EP0051302A1 EP 0051302 A1 EP0051302 A1 EP 0051302A1 EP 81109383 A EP81109383 A EP 81109383A EP 81109383 A EP81109383 A EP 81109383A EP 0051302 A1 EP0051302 A1 EP 0051302A1
Authority
EP
European Patent Office
Prior art keywords
molding box
cover
wire mesh
box according
sections
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.)
Withdrawn
Application number
EP81109383A
Other languages
German (de)
English (en)
French (fr)
Inventor
Werner Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aqseptence Group GmbH
Original Assignee
Passavant Werke AG and Co KG
Passavant Werke Michelbacher Hutte
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Passavant Werke AG and Co KG, Passavant Werke Michelbacher Hutte filed Critical Passavant Werke AG and Co KG
Publication of EP0051302A1 publication Critical patent/EP0051302A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/01—Flasks; Accessories therefor for vacuum-sealed moulding

Definitions

  • the invention relates to a molding box for the vacuum molding process with at least one vacuum line running through the molding box, or the like from a perforated tube. and a fine-mesh wire mesh drawn over it.
  • Such a molding box is known from DE-PS 22 48 968.
  • the vacuum serves to solidify the binder-free molding sand in the molding box.
  • the vacuum from the vacuum line is evenly distributed in the molding sand, which has proven to be particularly advantageous for complicated and / or large-area castings.
  • the fine-mesh wire mesh does not withstand the temperatures that occur during casting for long. This is especially true if you which is favorable for casting reasons, arranges the vacuum line as close as possible to the casting cavity. The wire mesh burns and becomes permeable to the molding sand.
  • the invention is therefore based on the object of further developing the molding box mentioned at the outset in such a way that the wire mesh has a longer service life.
  • the molding box according to the invention is characterized in that the wire mesh is largely covered by an outer cover provided with openings.
  • the cover protects the wire mesh without hindering the distribution of the vacuum through the vacuum line.
  • the vacuum line can be arranged very close to the mold cavity without danger to the wire mesh.
  • a particularly favorable shielding of the wire mesh results from the fact that the openings of the cover are only partially cut out and are raised like a flap.
  • the cover is preferably formed by metal strips. This material is not only particularly cheap and easy to work with, but also sufficiently resistant so that protection against falling castings is readily provided.
  • the invention can further be characterized in that the cover at least partially abuts the wire mesh directly and its openings correspond to the holes in the perforated tube.
  • the cover also serves to clamp the wire mesh onto the perforated tube. If only individual areas of the cover are used for this purpose, the remaining areas at a distance from the pipe can do so promise to form a protective "canopy" of the wire mesh. If the cover is fully in contact, no liquid metal can penetrate the gap between the cover and the wire mesh in the event of incorrect castings. Any damage to the wire mesh is then limited to the areas of the openings in the cover.
  • the lack of a void between the cover and the wire mesh may also be advantageous because no sand can settle there, which otherwise could only clog up when the empty molding box was transported and then lead to additional environmental pollution due to the development of dust.
  • the perforated tube has a square, in particular square, cross section. This offers the possibility of producing the cover from flat sections in a simple manner.
  • the cover is divided in the longitudinal direction of the tube into sections that are easy to manufacture and assemble. It is also possible to design the openings not as recesses in the cover, but as spaces between the sections.
  • the wire mesh can advantageously also be divided into corresponding sections. Any exchange of individual wire mesh panels does not pose any difficulties in this way. This applies in particular when, as is also proposed by the invention, opposite sections are held by screws penetrating the tube.
  • a molded box 1 partially shown in plan view in FIG. 1 consists of a frame 2 which is open at the top and bottom, one longitudinal side of which is designed as a hollow box section 3 and carries a connecting piece 4 for a suction line.
  • a frame 2 which is open at the top and bottom, one longitudinal side of which is designed as a hollow box section 3 and carries a connecting piece 4 for a suction line.
  • On the inside of the hollow box profile screw connections 5 are provided for vacuum lines 6, the opposite free ends of which are loosely held in pipe sections 5 '.
  • a section of a wire mesh 9 is placed between the two and is tightly clamped by means of the sections of the cover 8 fastened by screws 10. The screws 10 penetrate the entire tube. Two screws that belong together are slightly offset in the longitudinal direction of the pipe so that they pass each other. The sections of the wire mesh 9 are also penetrated by the screws, so that the sections of the cover 8 rest over their entire length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Secondary Cells (AREA)
EP81109383A 1980-11-05 1981-10-30 Formkasten für das Vakuumformverfahren Withdrawn EP0051302A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8029438U 1980-11-05
DE19808029438 DE8029438U1 (de) 1980-11-05 1980-11-05 Formkasten fuer das vakuumformverfahren

Publications (1)

Publication Number Publication Date
EP0051302A1 true EP0051302A1 (de) 1982-05-12

Family

ID=6720320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109383A Withdrawn EP0051302A1 (de) 1980-11-05 1981-10-30 Formkasten für das Vakuumformverfahren

Country Status (3)

Country Link
EP (1) EP0051302A1 (uk)
JP (1) JPS57132745U (uk)
DE (1) DE8029438U1 (uk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567932A (en) * 1983-05-21 1986-02-04 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Vacuum moulding flask

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123363C1 (de) * 1981-06-12 1982-11-04 Heinrich Wagner Maschinenfabrik GmbH & Co, 5928 Laasphe Vorrichtung fuer die Herstellung von Giessformen
DE3217477A1 (de) * 1982-05-10 1983-11-10 Buderus Ag, 6330 Wetzlar Formkasten fuer eine durch unterdruck herzustellende giessform
CN110947920B (zh) * 2019-12-18 2020-11-13 芜湖久弘重工股份有限公司 一种消失模铸造工艺用砂箱
CN117226051B (zh) * 2023-11-15 2024-01-30 山西汉通鑫宇科技股份有限公司 一种铸造用智能砂箱

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2156138A1 (uk) * 1971-10-08 1973-05-25 Akita Kk
FR2163455A1 (uk) * 1971-12-14 1973-07-27 Akita Kk
DE2511620A1 (de) * 1974-03-16 1975-09-25 Sintokogio Ltd Verfahren und vorrichtung zur herstellung von vakuumgedichteten giessformen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5149721U (uk) * 1974-10-14 1976-04-15

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2156138A1 (uk) * 1971-10-08 1973-05-25 Akita Kk
FR2163455A1 (uk) * 1971-12-14 1973-07-27 Akita Kk
DE2511620A1 (de) * 1974-03-16 1975-09-25 Sintokogio Ltd Verfahren und vorrichtung zur herstellung von vakuumgedichteten giessformen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567932A (en) * 1983-05-21 1986-02-04 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Vacuum moulding flask

Also Published As

Publication number Publication date
JPS57132745U (uk) 1982-08-18
DE8029438U1 (de) 1981-03-19

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT

17P Request for examination filed

Effective date: 19820825

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840124

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHNEIDER, WERNER