DE1720214A1 - Process for the production of dimensionally accurate molded bodies from polyamides using the injection molding process - Google Patents

Process for the production of dimensionally accurate molded bodies from polyamides using the injection molding process

Info

Publication number
DE1720214A1
DE1720214A1 DE19671720214 DE1720214A DE1720214A1 DE 1720214 A1 DE1720214 A1 DE 1720214A1 DE 19671720214 DE19671720214 DE 19671720214 DE 1720214 A DE1720214 A DE 1720214A DE 1720214 A1 DE1720214 A1 DE 1720214A1
Authority
DE
Germany
Prior art keywords
polymerization
polyamides
injection cylinder
production
lactam
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.)
Pending
Application number
DE19671720214
Other languages
German (de)
Inventor
Wilhelm Dr Hechelhammer
Arne Dr Rothenspieler
Kurt Dr 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.)
Bayer AG
ANKERWERK NUERNBERG GmbH
Original Assignee
Bayer AG
ANKERWERK NUERNBERG GmbH
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 Bayer AG, ANKERWERK NUERNBERG GmbH filed Critical Bayer AG
Publication of DE1720214A1 publication Critical patent/DE1720214A1/en
Pending 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
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/38—Heating or cooling
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers

Description

HnKERIUERK 1 7 ? Π ? 1 AHnKERIUERK 1 7? Π? 1 A

Verfahren zur Herstellung maßtreuer Formkörper aus Polyamiden nach dem SpritzgußverfahrenProcess for the production of dimensionally accurate moldings Polyamides by injection molding

(Zusatz zur Patentanmeldung A 54 509 IVd/39c)(Addition to patent application A 54 509 IVd / 39c)

Die Erfindung nach dem Hauptpatent The invention according to the main patent

(Patentanmeldung A 54 509 IVd/39c) bezieht sich auf ein T/erfahren zur Herstellung maßtreuer Formkörper aus*Polyamiden nach dem Spritzgußverfahren und auf Anordnungen zur Durchführung dieses Verfahrens mittels ionischer Polymerisation von Caprolactam oder Mischungen von Lactamen.(Patent application A 54 509 IVd / 39c) refers to a T / experience for the production of dimensionally accurate moldings from * polyamides after the injection molding process and on arrangements for carrying out this process by means of ionic polymerization of caprolactam or mixtures of lactams.

Nach dem Hauptpatent "besteht nun die Erfindung darin, -.daß- man zur Herstellung eines oder mehrerer Formkörper flüssiges oder pulverförmiges Lactam oder eine Mischung von Lactamen, wobei ein Teil den Katalysator und ein anderer Teil den Polymerisationaaktivator enthält, aus Jeweils einem temperierbaren Vorratsbehälter über Zuführleitungen dem rückwärtigen Ende eines Spritzzylinders zufuhrt, das monomere Lactam bzw. Lactamgemisch mit den Zusatzstoffen vermischt und einer die Polymerisation bewirkenden Temperatur aussetzt, anschließend das gebildete , Polymere im Spritzzylinder aufschmilzt, schließlich die Schmelze mit Hilfe der im Spritzzylinder rotier- undAccording to the main patent, "the invention now consists in -.daß- one for the production of one or more moldings liquid or powdered lactam or a mixture of lactams, one part containing the catalyst and another part containing the polymerization activator In each case a temperature-controlled storage container via feed lines to the rear end of an injection cylinder supplies the monomeric lactam or lactam mixture with the Mixed additives and exposed to a temperature causing the polymerization, then the formed, Polymer melts in the injection cylinder, ultimately the Melt with the help of the rotating in the injection cylinder and

- 2 109823/1913 - 2 109823/1913

„«ELH„"" E L H "

nUHnjBBERGnUHnjBBERG

axial verschiebbar gelagerten Schnecke über eine Düse in eine Form preßt und unter Nachdruck erstarren läßt. In weiterer Ausgestaltung dieser Erfindung ist nach dem Hauptpatent noch vorgesehen, daß das aus der Düse des Spritzzylinders austretende Material zunächst in einen Kolbenzylinder gelangt und dann erst durch den darin verschiebbar gelagerten Spritzkolben in mindestens einen Formenhohlraum einer mehrteiligen Form befördert wird, worauf dann der Cpritzkolben den vorgesehenen Nachdruck ausübt. Im Hauptpatent wird außerdem noch hervorgehoben, daß dem Spritzzylinder anstelle der Lactame oder deren Mischungen mit Katalysator und der Lactame oder deren Mischungen mit Cokatalysator (Aktivator) eine alle notwendige Komponenten aufweisende polymerisationafähige oder vorpolymerisierte Mischung aufgegeben werden kann und daß zudem die Möglichkeit besteht, daß erfindungsgemäß der gesamte Cokatalysator (Aktivator) oder ein Teil desselben den zu verarbeitenden Lactamen oder deren Mischungen erst im mittleren Drittel des Spritzzylinder oder Kolbenzylinders beigegeben wird.axially displaceable screw is pressed into a mold via a nozzle and solidify under force leaves. In a further embodiment of this invention, the main patent also provides that the material emerging from the nozzle of the injection cylinder first enters a piston cylinder and only then through the injection plunger mounted displaceably therein into at least one mold cavity a multi-part mold is conveyed, whereupon the injection piston exerts the intended holding pressure. In the main patent it is also emphasized that the injection cylinder instead of the lactams or their Mixtures with catalyst and the lactams or their mixtures with cocatalyst (activator) are all necessary Components comprising polymerizable or prepolymerized mixture can be applied and that there is also the possibility that according to the invention the entire cocatalyst (activator) or a Part of the same the lactams to be processed or their mixtures only in the middle third of the injection cylinder or piston cylinder is added.

Die vorliegende Zusatzerfindung ist nun auf eine Verfeinerung und auf eine Weiterentwicklung der Hauptanmeldung gerichtet und besteht darin, daß die Polymerisation des Monomeren bzw. des Monoraerengeraiechea ober-The present additional invention is now on a refinement and on a further development of the main application directed and consists in the fact that the polymerization of the monomer or the Monoraerengeraiechea above

109823/1911109823/1911

RnKERUlERKRnKERUlERK

nuRn only

1 -7 ο η O -1 f 1 -7 ο η O -1 f

1 /2 υ 21 41/2 υ 21 4

halb der Schmelztemperatur dee Polymeren durchgeführt wird. Durch diese Maßnahme nach der vorliegenden Erfindung wird bewirkt, daß das Polymere sofort in geschmolzener Form anfällt und unverzüglich verarbeitet werden kann (Formfüllung). Die sich dadurch ergebende Zyklusverkürzung des Spritzgußverfahrens wirkt sich nicht zuletzt für den Kunststoffe verarbeitenden Betrieb vorteilhaft aus. carried out half of the melting temperature of the polymer will. This measure according to the present invention causes the polymer immediately in molten form and immediately can be processed (mold filling). The resulting shortening of the cycle of the injection molding process Last but not least, it has a beneficial effect on the plastics processing company.

109823/1913109823/1913

Claims (1)

17202U17202U PatentanspruchClaim Verfahren zur Herstellung maßtreuer Formkörper aus Polyamiden mittels ionischer Polymerisation von Caprolactam oder Mischungen von Lactamen, wobei man zur Herstellung eines oder mehrerer Formkörper flüssiges oder pulverförmiges Lactam oder eine Mischung von Lactamen, wovon ein Teil den Katalysator und ein anderer Teil den Polymerisationsaktivator enthält, aus jeweils einem temperierbaren Vorratsbehälter über Zuführleitungen dem rückwärtigen Ende eines Spritzzylinders zuführt, das monomere Lactam bzw. Lactamgemisch mit den Zusatzstoffen vermischt und einer die Polymerisation bewirkenden Temperatur aussetzt, anschließend das gebildete Polymere im Spritzzylinder aufschmilzt, schließlich die Schmelze mit Hilfe der im Spritzzylinder rotier- und axial verschiebbar gelagerten Schnekke über eine Düse in eine Form preßt und unter Nachdruck erstarren läßt, nach Patent Process for the production of dimensionally accurate molded articles from polyamides by means of ionic polymerization of caprolactam or mixtures of lactams, one or more moldings being produced using liquid or powdered lactam or a mixture of lactams, part of which is the catalyst and a the other part contains the polymerization activator, each from a temperature-controlled storage container Feed lines feed the rear end of an injection cylinder, the monomeric lactam or lactam mixture mixed with the additives and exposed to a temperature causing the polymerization, then the polymer formed melts in the injection cylinder, and finally the melt with the aid of the in the injection cylinder rotatably and axially displaceably mounted screw presses through a nozzle in a mold and under pressure solidifies, according to patent (Patentanmeldung A 54 509 IVd/39c), dadurch gekennzeichnet, daß die Polymerisation des Monomeren bzw. des Monomerengemisches oberhalb der Schmelztemperatur des Polymer^! durchgeführt wird.(Patent application A 54 509 IVd / 39c), characterized in that the polymerization of the monomer or of the monomer mixture above the melting temperature of the polymer ^! is carried out. 109823/1913109823/1913
DE19671720214 1966-12-30 1967-05-18 Process for the production of dimensionally accurate molded bodies from polyamides using the injection molding process Pending DE1720214A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEA0054509 1966-12-30
DEA0055735 1967-05-18

Publications (1)

Publication Number Publication Date
DE1720214A1 true DE1720214A1 (en) 1971-06-03

Family

ID=6940148

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19671720214 Pending DE1720214A1 (en) 1966-12-30 1967-05-18 Process for the production of dimensionally accurate molded bodies from polyamides using the injection molding process

Country Status (5)

Country Link
CH (1) CH554740A (en)
DE (1) DE1720214A1 (en)
FR (1) FR94666E (en)
GB (1) GB1213542A (en)
NL (1) NL6806741A (en)

Also Published As

Publication number Publication date
GB1213542A (en) 1970-11-25
NL6806741A (en) 1968-11-19
CH554740A (en) 1974-10-15
FR94666E (en) 1969-10-03

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