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1. WO1996019330 - TRANSFORMING PHYSICAL CHARACTERISTICS OF A MOLDABLE MATERIAL

Publication Number WO/1996/019330
Publication Date 27.06.1996
International Application No. PCT/US1994/014605
International Filing Date 19.12.1994
IPC
B29C 45/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
CPC
B29C 45/0082
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
0082Reciprocating the moulding material inside the mould cavity, e.g. push-pull injection moulding
Applicants
  • THERMOLD PARTNERS L.P. [US]/[US]
Inventors
  • IBAR, Jean-Pierre
Agents
  • LAVORGNA, Gregory, J.
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TRANSFORMING PHYSICAL CHARACTERISTICS OF A MOLDABLE MATERIAL
(FR) TRANSFORMATION DES CARACTERISTIQUES PHYSIQUES D'UN MATERIAU MOULABLE
Abstract
(EN)
A molding process is provided for molding a solid product from a moldable material in a mold. At least two spaced-apart reciprocating devices (50, 52) are provided which are in communication with the moldable material, and each includes a drivable member reciprocable within a chamber. The reciprocating devices (50, 52) exert a stress tensor prior to, and in the course of, solidifying. This stress tensor is created by reciprocating the drivable member with respect to another drivable member in accordance with a predetermined program (58), in a manner selected from: (a) at the same frequency, at a different amplitude and out of phase, (b) at the same frequency, at a different amplitude and in phase, (c) at a different frequency and at the same amplitude, and (d) at a different frequency and at a different amplitude. The moldable material is cooled to form a solid product during packing.
(FR)
Procédé de moulage d'un produit solidifié à partir d'un matériau moulable. Deux dispositifs à mouvement alternatif au moins (50, 52) en contact avec le matériau de moulage et comportant chacun un élément actionnable dans une chambre exercent un tenseur de contrainte avant et pendant la solidification. Ledit tenseur résulte du mouvement alternatif d'un des éléments actionnables par rapport à l'autre, selon un programme préétabli (58) qui peut être: a) même fréquence, amplitude différente et déphasés, b) même fréquence, amplitude différente et en phase, c) fréquence différente et même amplitude, et d) fréquence différente et amplitude différente. Le matériau moulable refroidit pendant son tassement pour former un produit solidifié.
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