DE378941C - Process for the production of hollow bodies - Google Patents

Process for the production of hollow bodies

Info

Publication number
DE378941C
DE378941C DEF41413D DEF0041413D DE378941C DE 378941 C DE378941 C DE 378941C DE F41413 D DEF41413 D DE F41413D DE F0041413 D DEF0041413 D DE F0041413D DE 378941 C DE378941 C DE 378941C
Authority
DE
Germany
Prior art keywords
production
hollow
hollow bodies
skin
distribution
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
DEF41413D
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.)
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 DEF41413D priority Critical patent/DE378941C/en
Application granted granted Critical
Publication of DE378941C publication Critical patent/DE378941C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Verfahren zur Herstellung von Hohlkörpern. Die Erfindung betrifft ein Verfahren zur Herstellung von Hohlkörpern durch Verteilung von in flüchtigen Lösungsmitteln gelösten hautbildenden Stoffen an den Innen- i Wandungen von Hohlformen und zeichnet sich dadurch aus; daß die Verteilung der hautbildenden Stoffe unter der Preßwirkung des Lösungsmitteldampfdruckes erfolgt. Dies hat zur Voraussetzung, daß die Verteilung der Lösung an den Formwandungen zur Erzeugung blasenfreier, gleichmäßiger Hohlkör- i per unter Luftabschluß erfolgt. Das Arbeiten unter Luftabschluß ist also eine Grundbedingung für das Verfahren, gleichgültig, ob man hautartig dünne Hohlkörper oder solche von j größerer Wandstärke an den Innenwandungen von Hohlformen bilden will, was auch von der Verwendung entsprechend konzentrierter Lösungen abhängt. Die Art und Weise, wie dieser Luftabschluß herbeigeführt wird, ist für das Wesen der Erfindung ohne besondere Bedeutung.Process for the production of hollow bodies. The invention relates to a process for the production of hollow bodies by dispersing in volatile ones Skin-forming substances dissolved in solvents on the inner walls of hollow molds and is characterized by it; that the distribution of the skin-forming substances under the pressing action of the solvent vapor pressure takes place. The prerequisite for this is that the distribution of the solution on the mold walls to produce bubble-free, more uniform Hollow body takes place in the absence of air. So working under the exclusion of air is a basic condition for the procedure, regardless of whether one is thin, skin-like, hollow bodies or form those with a greater wall thickness on the inner walls of hollow molds wants, which also depends on the use of appropriately concentrated solutions. The way in which this air exclusion is brought about is for the being of the invention of no particular importance.

Es ist klar, daß man das gleiche Verfahren auch zur schichtenweisen Bildung von Hohlkörpern verwenden kann, wobei ebenfalls die gebildeten Häutchen durch den Lösungsmitteldampfdruck an die Innenwandungen der Hohlformen gepreßt werden.It is clear that the same procedure can also be used for layering Formation of hollow bodies can use, with also the skin formed are pressed against the inner walls of the hollow molds by the solvent vapor pressure.

Man hat bereits die Herstellung von Hohl- , körpern durch Verdunstung von in flüchtigen Lösungsmitteln gelösten hautbildenden Stoffen vorgeschlagen, wobei gleichfalls die Lösung auf die Innenwandungen von Hohlformen gebracht wird, auf welchen sich die Haut bildet. Hier wird jedoch die Verdunstung der Lösung durch Einblasen von Luft beschleunigt, wobei die Hohlform offen ist. Es kann daher kein Überdruck bzw. die gemäß dem vorliegenden Verfahren technisch auszuwertende Preßwirkung des Lösungsmitteldampfdruckes in der Hohlform entstehen, was zur gleichmäßigen und blasenfreien Verteilung der hautbildenden Stoffe unumgänglich notwendig ist. Gegenüber den bekannten Verfahren gibt die Einwirkung des Dampfdruckes die Möglichkeit der Erzeugung beliebig starker Schichten bei Verwendung konzentrierter Lösungen.One already has the production of hollow bodies by evaporation proposed of skin-forming substances dissolved in volatile solvents, whereby likewise the solution is brought onto the inner walls of hollow molds which the skin forms. Here, however, the evaporation of the solution occurs Injection of air is accelerated, the hollow mold being open. It can therefore not be a Overpressure or the pressing effect to be technically evaluated according to the present process of the solvent vapor pressure in the hollow form, which leads to a uniform and bubble-free distribution of the skin-forming substances is essential. Opposite to the known method gives the effect of the vapor pressure the possibility of Creation of layers of any thickness using concentrated solutions.

Claims (1)

PATENT-ANSPRUCII: Verfahren zur Herstellung von Hohlkörpern durch Verteilung von in flüchtigen Lösungsmitteln gelösten hautbildenden Stoffen an den Innenwandungen von Hohlformen, dadurch gekennzeichnet, daß die Verteilung der Stoffe unter der Preßwirkung des Lösungsmitteldampfdruckes erfolgt.PATENT-ANSPRUCII: Process for the production of hollow bodies by Distribution of skin-forming substances dissolved in volatile solvents to the Inner walls of hollow molds, characterized in that the distribution of the substances takes place under the pressing action of the solvent vapor pressure.
DEF41413D 1916-11-05 1916-11-05 Process for the production of hollow bodies Expired DE378941C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF41413D DE378941C (en) 1916-11-05 1916-11-05 Process for the production of hollow bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF41413D DE378941C (en) 1916-11-05 1916-11-05 Process for the production of hollow bodies

Publications (1)

Publication Number Publication Date
DE378941C true DE378941C (en) 1923-08-08

Family

ID=7098663

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF41413D Expired DE378941C (en) 1916-11-05 1916-11-05 Process for the production of hollow bodies

Country Status (1)

Country Link
DE (1) DE378941C (en)

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