DE572591C - Self-sealing sand mold for aluminothermic rail welding - Google Patents

Self-sealing sand mold for aluminothermic rail welding

Info

Publication number
DE572591C
DE572591C DEA65667D DEA0065667D DE572591C DE 572591 C DE572591 C DE 572591C DE A65667 D DEA65667 D DE A65667D DE A0065667 D DEA0065667 D DE A0065667D DE 572591 C DE572591 C DE 572591C
Authority
DE
Germany
Prior art keywords
sand mold
self
sealing
rail welding
mold
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
Application number
DEA65667D
Other languages
German (de)
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.)
ALUMINOTHERMISCHE und ELEK SCH
Original Assignee
ALUMINOTHERMISCHE und ELEK SCH
Publication date
Priority to DEA65667D priority Critical patent/DE572591C/en
Application granted granted Critical
Publication of DE572591C publication Critical patent/DE572591C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K23/00—Alumino-thermic welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Description

Selbstdichtende Sandform für aluminothermische Schienenschweißungen Die Fugen der bekannten, bei der aluminothermischen Schienenschweißung allgemein gebräuchlichen Sandformen müssen zur Abdichtung nach Ansetzen der Form besonders mit feuchtem Lehm oder Ton außen rundum verschmiert werden. Damit der Dichtungsstoff bei Beheizung der Form nicht abbröckelt, ist es bekannt, ihn durch außen an den Blechformkästen angebrachte Winkel, Leisten, Nuten o. dgl: davor zu bewahren. Auch ist es bekannt, ringsum geschlossene Kanäle zwischen den Formteilen oder zwischen diesen und dem Werkstück anzuoldnen und nach dem Ansetzen der Form eine Dichtungsmasse in diese Kanäle einzuspritzen.Self-sealing sand mold for aluminothermic rail welding The joints of the well-known in the aluminothermic rail welding in general Common sand molds need to be specially designed for sealing after the mold has been set up be smeared all around with damp loam or clay on the outside. So that the sealant If the mold does not crumble off when heated, it is known to apply it to the outside Sheet metal boxes attached angles, strips, grooves or the like: to protect from this. Even it is known, all around closed channels between the molded parts or between to paint this and the workpiece and apply a sealant after setting the mold inject into these channels.

Ferner sind selbstdichtende Formen bekannt mit in den Formsand eingreifenden Dichtungsleisten, welche die Sandformränder an die zu verschweißenden Schienen anpressen.Furthermore, self-sealing molds are known with engaging in the molding sand Sealing strips that press the sand mold edges against the rails to be welded.

Die Erfindung betrifft ebenfalls eine selbstdichtende Sandform und besitzt den Vorteil, daß die Sandformränder beim Ansetzen und Anpressen der Formteile an die Schienen keinen Druck bekommen, durch den bisher stets mehr oder minder eine Formänderung des Gußhohlraumes, eine Loslösung des Sandformmittelteils von den Formrändern und ein Abbröckeln von Sandkanten stattfand. Es kann daher ihre Wandstärke erheblich verringert und somit Formsand gespart werden.The invention also relates to a self-sealing sand mold and has the advantage that the sand mold edges when attaching and pressing the molded parts get no pressure on the rails, through which up to now there has always been more or less one Change in shape of the casting cavity, a detachment of the sand mold center part from the mold edges and a crumbling of sand edges took place. It can therefore increase their wall thickness considerably reduced and thus molding sand can be saved.

Die Erfindung besteht darin, daß die Sandformränder nach außen abgeschrägt und mit Metall, beispielsweise Eisenblech, abgedeckt sind. Streicht man auf das Eisenblech die Dichtungsmasse, so wird deren überschüssiger Teil infolge der Schräge des Eisenbleches beim Anpressen der Form nach außen. herausgepreßt. Infolge der Eisenbewehrung überträgt sich der Preßdruck nicht mehr auf die Sandteile der-Form.The invention consists in that the sand mold edges beveled outwards and covered with metal such as sheet iron. If you paint on that Sheet iron is the sealing compound, so its excess part becomes due to the slope of the iron sheet when pressing the mold outwards. squeezed out. As a result of Iron reinforcement no longer transfers the pressure to the sand parts of the mold.

Die Zeichnung stellt Ausführungsbeispiele der Erfindung dar, und zwar zeigen Abb. r eine Form halb im Querschnitt und halb in Ansicht, Abb. a und 3 Längsschnitte.The drawing represents exemplary embodiments of the invention, namely Fig. r shows a shape half in cross-section and half in view, Fig. a and 3 longitudinal sections.

Es bezeichnet a die Schienen, b die Sandform, c -den Blechformkasten, d die schräge Eisenbewehrung der Sandwand an der Dichtungsstelle, e die Dichtungsmasse. Der Pfeil gibt die Richtung des Preßdruckes an.It denotes a the rails, b the sand mold, c - the sheet metal box, d the inclined iron reinforcement of the sand wall at the sealing point, e the sealing compound. The arrow indicates the direction of the pressing pressure.

Claims (1)

PATENTANSPRUCH: Selbstdichtende Sandform für aluminothermische Sehienenschweißungen, dadurch gekennzeichnet, daß die Sandformränder nach außen abgeschrägt 'und mit Eisenstreifen (d) abgedeckt sind, auf welche die Dichtungsmasse.(z.B. Ton oder Lehm) aufgebracht wird.PATENT CLAIM: Self-sealing sand mold for aluminothermic rail welds, characterized in that the sand mold edges beveled outwards' and with iron strips (d) are covered to which the sealant (e.g. clay or loam) is applied will.
DEA65667D Self-sealing sand mold for aluminothermic rail welding Expired DE572591C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA65667D DE572591C (en) Self-sealing sand mold for aluminothermic rail welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA65667D DE572591C (en) Self-sealing sand mold for aluminothermic rail welding

Publications (1)

Publication Number Publication Date
DE572591C true DE572591C (en) 1933-03-18

Family

ID=6943879

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA65667D Expired DE572591C (en) Self-sealing sand mold for aluminothermic rail welding

Country Status (1)

Country Link
DE (1) DE572591C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750192C (en) * 1935-11-05 1944-12-18 Linde Air Prod Co Welding process
EP0000456A1 (en) * 1977-07-08 1979-01-24 C. Delachaux Mould for the metallothermic welding of metal workpieces
EP0444480A1 (en) * 1990-02-27 1991-09-04 Elektro-Thermit GmbH Process for the intermediate cast welding of isothermal annealed rails

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750192C (en) * 1935-11-05 1944-12-18 Linde Air Prod Co Welding process
EP0000456A1 (en) * 1977-07-08 1979-01-24 C. Delachaux Mould for the metallothermic welding of metal workpieces
EP0444480A1 (en) * 1990-02-27 1991-09-04 Elektro-Thermit GmbH Process for the intermediate cast welding of isothermal annealed rails

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