DE557686C - Process for the production of molded parts from synthetic resins by the injection molding process - Google Patents

Process for the production of molded parts from synthetic resins by the injection molding process

Info

Publication number
DE557686C
DE557686C DED60581D DED0060581D DE557686C DE 557686 C DE557686 C DE 557686C DE D60581 D DED60581 D DE D60581D DE D0060581 D DED0060581 D DE D0060581D DE 557686 C DE557686 C DE 557686C
Authority
DE
Germany
Prior art keywords
production
synthetic resins
molded parts
injection molding
molding process
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
DED60581D
Other languages
German (de)
Inventor
Dipl-Ing Ferdinand Posner
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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
Priority claimed from DED57790D external-priority patent/DE540552C/en
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DED60581D priority Critical patent/DE557686C/en
Application granted granted Critical
Publication of DE557686C publication Critical patent/DE557686C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2357/00—Characterised by the use of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

Verfahren zur Herstellung von Formstücken aus Kunstharzen nach dem Spritzverfahren Das Hauptpatent 540 552 betrifft ein Verfahren zur Herstellung von Formstücken aus Kunstharzen nach dem Spritzverfahren, wobei als thermoplastisches Spritzgut polymere Verbindungen Verwendung finden, welche im monomeren Zustande den Atomkomplex CH2 - CH-(Vinylgruppe) enthalten. Bei manchen dieser Polymerisate tritt die Neigung des erhitzten Spritzgutes, am Stempel bzw. in der Form gelegentlich hängenzubleiben und alsdann beim gewaltsamen Loslösen von der Form zu deformieren, störend in Erscheinung. Es ist bereits im Hauptpatent erwähnt worden, daß es möglich ist, durch geeignete Zusätze die physikalischen Eigenschaften der Polymerisate zu ändern und damit die Verarbeitungsfähigkeit zu erhöhen. So ist es auch möglich, das Haftenbleiben durch Zusätze von beispielsweise ölartiger Natur mehr oder minder zu verhindern. Es wird jedoch durch diese Zusätze vielfach eine unerwünschte Weichheit und Biegsamkeit des Materials hervorgerufen.Process for the production of molded parts from synthetic resins according to the Injection process The main patent 540 552 relates to a process for the production of Moldings made of synthetic resins by the injection molding process, being thermoplastic Injection-molded polymeric compounds are used which are in the monomeric state contain the atomic complex CH2 - CH- (vinyl group). With some of these polymers the inclination of the heated spray material occurs occasionally on the punch or in the mold to get stuck and then to deform when forcibly detached from the shape, disturbing in appearance. It has already been mentioned in the main patent that it is possible is to improve the physical properties of the polymers through suitable additives change and thus increase the processing ability. So it is also possible the sticking due to additives of, for example, an oily nature, more or less to prevent. However, these additives often create an undesirable softness and flexibility of the material.

Es wurde nun gefunden, daß man den genannten Fehler in vorteilhafter Weise auch ohne Zusätze dadurch aufheben kann, daß man die dem Hauptpatent zugrunde liegenden Polymerisate vor ihrer Verarbeitung einer thermischen Härtung unterwirft, wobei die Härtung zweckmäßig bei Temperaturen von etwa roo° und mehr in An- und Abwesenheit katalytisch wirkender Substanzen, Formaldehyd, Säuren usw., erfolgen kann. Die so behandelten Produkte lassen sich gut verspritzen und lösen sich leicht vom Stempel und ohne Deformierung als hartes, sich nicht verbiegendes Spritzstück von der Form. Es ist bekannt (Österr. Patent 117866), polymere Vinylverbindungen durch Erhitzen zu härten zum Zwecke der Verarbeitung auf Filme oder auf dem üblichen Preßwege herzustellender Formstücke. Aus dieser Tatsache allein konnte indessen keineswegs ohne weiteres auf die vorteilhafte Verwendungsmöglichkeit thermisch gehärteter Produkte für den dem Hauptpatent zugrunde liegenden Spezialfall, nämlich für das Spritzverfahren, geschlossen werden.It has now been found that the error mentioned in more advantageous Way can also be canceled without additions by the fact that the basis of the main patent subjects lying polymers to thermal hardening before processing, the curing expediently at temperatures of about roo ° and more in an and Absence of catalytically active substances, formaldehyde, acids, etc., take place can. The products treated in this way can be sprayed easily and dissolve easily from the punch and without deformation as a hard, non-bending injection piece from the shape. It is known (Austrian Patent 117866), polymeric vinyl compounds to harden by heating for the purpose of processing on films or on the usual Press paths to be produced fittings. From this fact alone, however, could by no means without further ado to the advantageous possible use of thermally hardened Products for the special case on which the main patent is based, namely for the Spray process, are closed.

Claims (1)

PATENTANSPRUCH; Weiterausbildung des Verfahrens zur Herstellung von Formstücken aus Kunstharzen nach dem Spritzverfahren gemäß Patent 54o 552, dadurch gekennzeichnet, daß als Spritzgut thermisch gehärtete polymere Vinylverbindungen verwendet werden. PATENT CLAIM; Further development of the process for the production of molded parts from synthetic resins by the spraying process according to Patent 54o 552, characterized in that thermally cured polymeric vinyl compounds are used as the spray material.
DED60581D 1929-02-23 1931-03-07 Process for the production of molded parts from synthetic resins by the injection molding process Expired DE557686C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED60581D DE557686C (en) 1929-02-23 1931-03-07 Process for the production of molded parts from synthetic resins by the injection molding process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DED57790D DE540552C (en) 1929-02-23 1929-02-23 Process for the production of molded parts from synthetic resins after Sprití¡ í¡hren
DED60581D DE557686C (en) 1929-02-23 1931-03-07 Process for the production of molded parts from synthetic resins by the injection molding process

Publications (1)

Publication Number Publication Date
DE557686C true DE557686C (en) 1932-08-26

Family

ID=7057973

Family Applications (1)

Application Number Title Priority Date Filing Date
DED60581D Expired DE557686C (en) 1929-02-23 1931-03-07 Process for the production of molded parts from synthetic resins by the injection molding process

Country Status (1)

Country Link
DE (1) DE557686C (en)

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