PROCEDE ET DISPOSITIF DE FABRICATION DE STRUCTURES ALVEOLAIRES EN MATIERE THERMOPLASTIQUE ET STRUCTURES OBTENUES

• Main Author: GUY RENE DURRUY ET ROBERT EUGENE LHOMMEAU
• Format: Patent
• Language: French
• Published: 07.05.1982
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

L'INVENTION CONCERNE LA FABRICATION DE STRUCTURES ALVEOLAIRES EN MATIERE THERMOPLASTIQUE. SUIVANT L'INVENTION, LE PROCEDE CONSISTE A OPERER EN CONTINU OU NON, PAR EXTRUSION AU TRAVERS D'UN ETAGE FILIERE C DEFINI PAR LES TETES 8 DE CYLINDRES 7 TRAVERSANT UN ETAGE B D'ALIMENTATION OU D'INJECTION EN MATIERE PLASTIQUE A L'ETAT FLUIDE; CES CYLINDRES ETANT EUX-MEMES TRAVERSES PAR DES CONDUITS 3 DE FLUIDE DE REFROIDISSEMENT. LA SECTION DE LA STRUCTURE ALVEOLAIRE 15 EST DETERMINEE PAR LES ESPACES DEFINIS ENTRE LES TETES 8 DES CYLINDRES 7.APPLICATION NOTAMMENT A LA FABRICATION DE STRUCTURES ALVEOLAIRES EN POLYPROPYLENE EN NID D'ABEILLES UTILISABLES NOTAMMENT DANS LE BATIMENT SOUS FORME DE POUTRES OU DE PLAQUES. The present invention concerns manufacture of cellular structures of thermoplastics material. In particular the invention concerns apparatus for use in the production of cellular structures of thermoplastics material comprising a supply and injection stage (b) for supplying the thermoplastics material (12), a die stage (c) through which the thermoplastics material supplied by the supply and injection stage is extruded to form the cellular structure (15), and a cooling stage (d) supplied in use with cooling fluid (4) for cooling the extruded thermoplastics material, the different stages being located one above the other and the apparatus further comprising a plurality of regularly spaced cylinders (7), each cylinder (7) having a lower part (10) of lesser diameter provided with heating means (11) and an upper part (8) of greater diameter, the bodies of the cylinders extending through the supply and injection stage and the upper parts thereof forming said die stage. The invention is particularly applicable to the manufacture of cellular structures of large dimensions for buildings.