DE859424C - Process to facilitate the removal of moldings from their molds - Google Patents

Process to facilitate the removal of moldings from their molds

Info

Publication number
DE859424C
DE859424C DEK10057A DEK0010057A DE859424C DE 859424 C DE859424 C DE 859424C DE K10057 A DEK10057 A DE K10057A DE K0010057 A DEK0010057 A DE K0010057A DE 859424 C DE859424 C DE 859424C
Authority
DE
Germany
Prior art keywords
moldings
facilitate
potential difference
mold
molds
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
DEK10057A
Other languages
German (de)
Inventor
Kurt Dipl-Ing Kralupper
Hellmut Dipl-Ing Rabe
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEK10057A priority Critical patent/DE859424C/en
Application granted granted Critical
Publication of DE859424C publication Critical patent/DE859424C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • B28B13/065—Removing the shaped articles from moulds by applying electric current or other means of discharging, e.g. pneumatic or hydraulic discharging means

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Verfahren zur Erleichterung der Ausbringung von Formlingen aus ihren Formen Die Ausbringung von Formlingen, die unmittelbar nach der Herstellung entformt werden sollen, bereitet Schwierigkeiten, die vor allem durch das Haftvermögen des Formgutes am der Formwand bei noch geringer Festigkeit verursacht werden.Process to facilitate the application of moldings from their Forming The output of molded parts that are removed from the mold immediately after production should be, causes difficulties, mainly due to the adhesive strength of the Shaped goods are caused on the mold wall when the strength is still low.

Diese Schwierigkeiten werden gegenwärtig entweder durch mechanische Ausstoßvorrichtungen oder durch die Verwendung von zerlegbaren Formen oder schließlich durch Kippen und Aufsetzen der Form bzw. durch eine Kombination der genannten Verfahren behoben.These difficulties are currently caused either by mechanical ones Ejectors or through the use of separable molds or finally by tilting and placing the mold or by a combination of the methods mentioned Fixed.

Die dazu erforderlichen Einrichtungen sind kompliziert, in ihrer Anwendung zeitraubend und somit kostspielig.The facilities required for this are complicated to use time consuming and therefore costly.

Erfindungsgemäß lassen. sich diese Nachteile dadurch vermeiden, da.ß zwischen Formwand und Formgut eine Potentialdifferenz hervorgerufen und ausgenutzt wird, die zur Bildung eines oberflächlichen Wasserfilms bzw. von Gasblasen führt und damit ein leichtes Gleiten zwischen Formling und, Form bei der Ausbringung bewirkt.Let according to the invention. avoid these disadvantages by the fact that between the mold wall and the material to be molded, a potential difference is created and used which leads to the formation of a superficial water film or gas bubbles and thus causes easy sliding between the molding and the mold during application.

Das erfindungsgemäße Verfahren bedingt, daß die Formwände zumindestens teilweise elektrisch leitfähig sind. Diese Leitfähigkeit kann. z. B. dadurch gegeben sein, daß die Form aus Metall hergestellt ist. Ebenso können nicht metallische Forinen verwendet werden, die eine oberflächliche Metallisierung aufweisen. Diese Metallisierung kann durch Metallfolien, durch Spritzverfahren oder ähnliche bekannte Verfahren dargestellt werden. Die Ausbildung der Potentialdifferenz zwischen Wand- und Formgut kann durch Wahl geeigneten Wandmaterials, vorzugsweise Kupfer bzw. Silber und deren: Legierungen auf Grund ihrer Stellung in der elektrolytischen Spannungsreihe, selbsttätig erfolgen bzw. durch Anlegen einer elektrischen Spannung bei Verwendung beliebigen, leitfähigen Wandmaterials hergestellt werden.The inventive method requires that the mold walls at least are partially electrically conductive. This conductivity can. z. B. given thereby be that the mold is made of metal. Non-metallic forins can also be used can be used, which have a superficial metallization. This metallization can by metal foils, by spraying processes or similar known processes being represented. The formation of the potential difference between Wall and molded goods can be made by choosing a suitable wall material, preferably copper or silver and their: alloys due to their position in the electrolytic Voltage series, take place automatically or by applying an electrical voltage using any conductive wall material.

Die anzulegende Spannung ist von der Gestalt der Form, von deren Abmessungen, von der chemischen Zusammensetzung des Formgutes sowie von der Leitfähigkeit des verwendeten Wassers abhängig und variiert somit in weiten Grenzen.The voltage to be applied depends on the shape of the mold, its dimensions, the chemical composition of the molded product and the conductivity of the water used and thus varies within wide limits.

Es kann sowohl Gleich- als auch Wechselspannung beliebiger Frequenz verwendet werden, wobei in einem Fall die Bildung des Wasserfilms, im anderen Fall die Gasbildung im Vordergrund steht.Both DC and AC voltage of any frequency can be used can be used, in one case the formation of the water film, in the other the focus is on gas formation.

Claims (1)

PATENTANSPRÜCFIE: i. Verfahren zur Erleichterung der Ausbringung von Formlingen aus ihren Formen, dadurch gekennzeichnet, daß eine Potentialdifferenz zwischen Formgut und; Formwand, die zu diesem Zweck mindestens teilweise leitfähig sein. muß, ausgenutzt wird. a. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß die Potentialdifferenz durch Verwendung von Metallen, die in der elektrolytischen Spannungsreihe zwischen Wasserstoff und Gold stehen, selbsttätig zustande kommt. 3. Verfahren nach Anspruch z oder z und a, dadurch gekennzeichnet, daß bei Verwendung beliebigen. leitenden Wandmaterials die Potentialdifferenz durch Anlegen einer äußeren Spannung hervorgerufen, wird.PATENT CLAIM: i. Procedure to facilitate the application of Moldings from their forms, characterized in that a potential difference between molded product and; Mold wall, which for this purpose is at least partially conductive be. must be exploited. a. Method according to claim r, characterized in that that the potential difference by using metals that are in the electrolytic The series of voltages between hydrogen and gold comes about automatically. 3. The method according to claim z or z and a, characterized in that when used any. conductive wall material the potential difference by applying an external Tension is evoked.
DEK10057A 1951-05-06 1951-05-06 Process to facilitate the removal of moldings from their molds Expired DE859424C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK10057A DE859424C (en) 1951-05-06 1951-05-06 Process to facilitate the removal of moldings from their molds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK10057A DE859424C (en) 1951-05-06 1951-05-06 Process to facilitate the removal of moldings from their molds

Publications (1)

Publication Number Publication Date
DE859424C true DE859424C (en) 1952-12-15

Family

ID=7212707

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK10057A Expired DE859424C (en) 1951-05-06 1951-05-06 Process to facilitate the removal of moldings from their molds

Country Status (1)

Country Link
DE (1) DE859424C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012242B (en) * 1953-12-15 1957-07-11 Johns Manville Device for loosening a wet cement-containing pipe from a mandrel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012242B (en) * 1953-12-15 1957-07-11 Johns Manville Device for loosening a wet cement-containing pipe from a mandrel

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