ES2111783T3 - Dosificacion de agente de expansion en la fabricacion de espumas de material sintetico. - Google Patents

Dosificacion de agente de expansion en la fabricacion de espumas de material sintetico.

Info

Publication number
ES2111783T3
ES2111783T3 ES94101995T ES94101995T ES2111783T3 ES 2111783 T3 ES2111783 T3 ES 2111783T3 ES 94101995 T ES94101995 T ES 94101995T ES 94101995 T ES94101995 T ES 94101995T ES 2111783 T3 ES2111783 T3 ES 2111783T3
Authority
ES
Spain
Prior art keywords
servo
foaming agent
valve
pressure
amount
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 - Lifetime
Application number
ES94101995T
Other languages
English (en)
Inventor
Bernd Dipl-Ing Klane
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Application granted granted Critical
Publication of ES2111783T3 publication Critical patent/ES2111783T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B29C44/3446—Feeding the blowing agent
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Abstract

EL PROCEDIMIENTO SE REFIERE A LA ELABORACION DE MASA ESPONJOSA DE PLASTICO EXTRUSIONADA, DONDE SE GUIA EL PLASTICO TRANSPORTADO AL EXTRUSIONADOR CON UN AGENTE PROPULSOR CON ALTA PRESION Y SE REGULA LA CANTIDAD DE AGENTE PROPULSOR MEDIANTE UNA VALVULA DE AJUSTE. EN OSCILACIONES DE LA PRESION DE LA MASA DE LA COLADA DE PLASTICO DEBE SER REGULADA DE FORMA CORRESPONDIENTE LA CANTIDAD DE AGENTE PROPULSOR GUIADO A PARTIR DE LA VALVULA (4) DE REGULACION. A MENUDO NO SE ALCANZA LA RELACION DE AJUSTE EN LAS VALVULAS DE REGULACION HABITUALES. PARA ELLO SE PROPONE, QUE SE MANTENGA CONSTANTE LA PRESION DETRAS DE LA VALVULA DE REGULACION POR MEDIO DE UNA VALVULA (5) DE MANTENIMIENTO DE PRESION Y QUE LA CANTIDAD DEL AGENTE PROPULSOR SE REGULE DIRECTAMENTE EN DEPENDENCIA DE LA MASA DE PLASTICO TRANSPORTADA, CON PREFERENCIA POR MEDIO DE LA VELOCIDAD DE GIRO DEL EXTRUSIONADOR.
ES94101995T 1993-02-25 1994-02-09 Dosificacion de agente de expansion en la fabricacion de espumas de material sintetico. Expired - Lifetime ES2111783T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4305866A DE4305866A1 (de) 1993-02-25 1993-02-25 Treibmitteldosierung bei der Herstellung von Kunststoffschäumen

Publications (1)

Publication Number Publication Date
ES2111783T3 true ES2111783T3 (es) 1998-03-16

Family

ID=6481339

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94101995T Expired - Lifetime ES2111783T3 (es) 1993-02-25 1994-02-09 Dosificacion de agente de expansion en la fabricacion de espumas de material sintetico.

Country Status (5)

Country Link
EP (1) EP0615830B1 (es)
AT (1) ATE161465T1 (es)
CZ (1) CZ32594A3 (es)
DE (2) DE4305866A1 (es)
ES (1) ES2111783T3 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646665A1 (de) * 1996-11-12 1998-05-14 Linde Ag Durchflußregelung
DE19808266A1 (de) * 1998-02-27 1999-09-09 Messer France Sa Verfahren und Vorrichtung zum Schäumen von Kunststoffen
DE19934693C2 (de) * 1999-07-23 2002-03-07 Fraunhofer Ges Forschung Verfahren und Vorrichtung zur Herstellung von Polymerschäumen
US6926507B2 (en) 2000-03-07 2005-08-09 Trexel, Inc. Blowing agent delivery system
US6616434B1 (en) * 2000-08-10 2003-09-09 Trexel, Inc. Blowing agent metering system
US7144532B2 (en) 2002-10-28 2006-12-05 Trexel, Inc. Blowing agent introduction systems and methods
DE10314797A1 (de) * 2003-04-01 2004-10-14 Linde Ag Kohlendioxid-Versorgung
US7703705B2 (en) 2007-02-16 2010-04-27 Nordson Corporation Apparatus and method for dispensing a mixture of a gas and a fluid material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1485587A (en) * 1974-01-22 1977-09-14 Furukawa Electric Co Ltd Process of producing a foamed thermoplastics resin articl
JPS53146766A (en) * 1977-05-27 1978-12-20 Furukawa Electric Co Ltd:The Producing equipment of foams
US4244897A (en) * 1979-03-22 1981-01-13 Measurex Corporation Method and apparatus to control the density of products produced from an extrusion process
DE3316838C2 (de) * 1983-05-07 1986-08-21 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Tandem-Extruderanlage zur Herstellung einer geschäumten Materialbahn aus thermoplastischem Material, insbesondere aus Polystyrol
DE3600041A1 (de) * 1986-01-03 1987-07-09 Reifenhaeuser Masch Anlage fuer die herstellung von kunststoffhalbzeug aus geschaeumtem kunststoff
DE3637918A1 (de) * 1986-11-06 1988-06-01 Battenfeld Gmbh Vorrichtung zum einfuehren eines gases in thermoplastische kunststoffschmelze
DE4019202A1 (de) * 1990-06-15 1991-12-19 Berstorff Gmbh Masch Hermann Verfahren zum herstellen eines schaumstoffes aus thermoplastischem kunststoff
DE4036991A1 (de) * 1990-11-20 1992-05-21 Linde Ag Verfahren zur verwendung inerter treibmittel bei der herstellung aufgeschaeumter kunststoffe

Also Published As

Publication number Publication date
ATE161465T1 (de) 1998-01-15
DE59404849D1 (de) 1998-02-05
EP0615830A1 (de) 1994-09-21
CZ32594A3 (en) 1995-02-15
EP0615830B1 (de) 1997-12-29
DE4305866A1 (de) 1994-09-01

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