FR2447803A1 - PROCESS FOR PRODUCING MOLDED PARTS MADE OF PLASTIC MATERIAL TRANSFORMED INTO FOAM, SUCH AS FOR EXAMPLE POLYSTYRENE CONVERTED INTO FOAM - Google Patents

PROCESS FOR PRODUCING MOLDED PARTS MADE OF PLASTIC MATERIAL TRANSFORMED INTO FOAM, SUCH AS FOR EXAMPLE POLYSTYRENE CONVERTED INTO FOAM

Info

Publication number
FR2447803A1
FR2447803A1 FR8000379A FR8000379A FR2447803A1 FR 2447803 A1 FR2447803 A1 FR 2447803A1 FR 8000379 A FR8000379 A FR 8000379A FR 8000379 A FR8000379 A FR 8000379A FR 2447803 A1 FR2447803 A1 FR 2447803A1
Authority
FR
France
Prior art keywords
foam
plastic material
molded parts
mold
example polystyrene
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.)
Granted
Application number
FR8000379A
Other languages
French (fr)
Other versions
FR2447803B1 (en
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
Priority claimed from DE2903495A external-priority patent/DE2903495C2/en
Priority claimed from DE2911120A external-priority patent/DE2911120C2/en
Application filed by Individual filed Critical Individual
Publication of FR2447803A1 publication Critical patent/FR2447803A1/en
Application granted granted Critical
Publication of FR2447803B1 publication Critical patent/FR2447803B1/fr
Granted 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
    • B29C44/3461—Making or treating expandable particles
    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material

Abstract

PROCEDE DE PRODUCTION DE PIECES MOULEES 62 EN MATIERE PLASTIQUE TRANSFORMEE EN MOUSSE, TEL QUE PAR EXEMPLE DU POLYSTYRENE SOUS FORME DE MOUSSE. LA MATIERE PLASTIQUE EST INTRODUITE SOUS FORME DE PERLES PREFORMEES CONTENANT UN AGENT DE GONFLEMENT POROGENE DANS UN MOULE SEPARABLE 2 ET EST SOUMISE DANS CELUI-CI A L'ACTION D'UN AGENT MOUSSANT GAZEUX CHAUD QUI PROVOQUE LA FUSION AVEC SOUDAGE DES PERLES SUBISSANT UNE EXPANSION SUPPLEMENTAIRE. LA MOUSSE AINSI OBTENUE EST STABILISEE AVANT ENLEVEMENT DE LA PIECE MOULEE DU MOULE EN LA FAISANT TRAVERSER SOUS PRESSION PAR UN AGENT DE STABILISATION SOUS FORME D'UN GAZ. LE PROCESSUS DE STABILISATION PEUT ETRE REPETE PLUSIEURS FOIS. ON PEUT AUSSI APPLIQUER UN VIDE, AU COURS DE LA PHASE DE STABILISATION, A LA PIECE MOULEE. LE MOULE CONCERNE PEUT COMPORTER, A LA PLACE DES BUSES HABITUELLES 26 OU DES FENTES, DES PAROIS INTERNES DE MOULES 28, 30 EN UN MATERIAU POREUX, COMME PAR EXEMPLE UN METAL FRITTE.PROCESS FOR THE PRODUCTION OF MOLDED PARTS 62 OF PLASTIC MATERIAL TRANSFORMED INTO FOAM, SUCH AS FOR example POLYSTYRENE IN THE FORM OF FOAM. THE PLASTIC MATERIAL IS INTRODUCED IN THE FORM OF PREFORMED PEARLS CONTAINING A POROGENIC SWELLING AGENT IN A SEPARABLE MOLD 2 AND IS SUBJECT THEREIN TO THE ACTION OF A HOT GAS FOAMING AGENT WHICH CAUSES THE FUSION WITH WELDING OF THE EXPANDED PEARLS ADDITIONAL. THE FOAM THUS OBTAINED IS STABILIZED BEFORE REMOVAL OF THE MOLDING PART FROM THE MOLD THROUGH PRESSURE THROUGH A STABILIZING AGENT IN THE FORM OF A GAS. THE STABILIZATION PROCESS CAN BE REPEATED SEVERAL TIMES. WE CAN ALSO APPLY A VACUUM, DURING THE STABILIZATION PHASE, TO THE MOLDED PART. THE MOLD CONCERNED MAY INCLUDE, IN PLACE OF THE USUAL NOZZLES 26 OR SLOTS, INTERNAL WALLS OF MOLDS 28, 30 IN A POROUS MATERIAL, SUCH AS A SINTERED METAL.

FR8000379A 1979-01-30 1980-01-09 PROCESS FOR PRODUCING MOLDED PARTS MADE OF PLASTIC MATERIAL TRANSFORMED INTO FOAM, SUCH AS FOR EXAMPLE POLYSTYRENE CONVERTED INTO FOAM Granted FR2447803A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2903495A DE2903495C2 (en) 1979-01-30 1979-01-30 Process for the production of molded bodies from foamed plastic, in particular from foamed polystyrene
DE2911120A DE2911120C2 (en) 1979-03-21 1979-03-21 Process for producing molded articles from foamed plastic, such as foamed polystyrene

Publications (2)

Publication Number Publication Date
FR2447803A1 true FR2447803A1 (en) 1980-08-29
FR2447803B1 FR2447803B1 (en) 1983-06-17

Family

ID=25777600

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8000379A Granted FR2447803A1 (en) 1979-01-30 1980-01-09 PROCESS FOR PRODUCING MOLDED PARTS MADE OF PLASTIC MATERIAL TRANSFORMED INTO FOAM, SUCH AS FOR EXAMPLE POLYSTYRENE CONVERTED INTO FOAM

Country Status (5)

Country Link
CH (1) CH642903A5 (en)
ES (1) ES8100153A1 (en)
FR (1) FR2447803A1 (en)
GB (1) GB2040788B (en)
SE (1) SE8000748L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6547547B2 (en) * 2000-02-01 2003-04-15 Daisen Industry Co., Ltd. Apparatus for molding composite foam molding element
US20010021402A1 (en) * 2000-03-13 2001-09-13 Iwao Nohara Foam molding die apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1274755A (en) * 1960-10-17 1961-10-27 Wanner Ag Process for shaping materials to be shaped or foamed in molds
FR2010450A1 (en) * 1968-06-08 1970-02-13 Gruenzweig & Hartmann Porous mould wall zones for steam heated mouldings of
DE1779415A1 (en) * 1968-08-09 1971-11-18 Basf Ag Process for the production of molded articles
GB1534696A (en) * 1976-03-26 1978-12-06 Precision Rams Ltd Manufacture of insulating blocks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1274755A (en) * 1960-10-17 1961-10-27 Wanner Ag Process for shaping materials to be shaped or foamed in molds
FR2010450A1 (en) * 1968-06-08 1970-02-13 Gruenzweig & Hartmann Porous mould wall zones for steam heated mouldings of
DE1779415A1 (en) * 1968-08-09 1971-11-18 Basf Ag Process for the production of molded articles
GB1534696A (en) * 1976-03-26 1978-12-06 Precision Rams Ltd Manufacture of insulating blocks

Also Published As

Publication number Publication date
FR2447803B1 (en) 1983-06-17
GB2040788A (en) 1980-09-03
ES488064A0 (en) 1980-11-01
CH642903A5 (en) 1984-05-15
GB2040788B (en) 1982-10-06
SE8000748L (en) 1980-07-31
ES8100153A1 (en) 1980-11-01

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Legal Events

Date Code Title Description
ST Notification of lapse