EP 1799423 A1 20070627 - INJECTION MOULDING DEVICE WITH INCREASED TIGHTNESS BETWEEN THE INJECTION NOZZLE AND MOULDING MATRIX
Title (en)
INJECTION MOULDING DEVICE WITH INCREASED TIGHTNESS BETWEEN THE INJECTION NOZZLE AND MOULDING MATRIX
Title (de)
SPRITZGUSSVORRICHTUNG MIT ERHÖHTER DICHTE ZWISCHEN DER EINSPRITZDÜSE UND DER GUSSMATRIX
Title (fr)
DISPOSITIF D'INJECTION-MOULAGE A ETANCHEITE RENFORCEE ENTRE BUSE D'INJECTION ET MATRICE DE MOULAGE
Publication
Application
Priority
- FR 2005002537 W 20051013
- FR 0410923 A 20041015
Abstract (en)
[origin: WO2006042942A1] The invention relates to a device for injecting a thermoplastic material in a liquid state into a moulding cavity. Close to the moulding cavity (4), a centering and thermal insulation ring (31), which is arranged between the outer peripheral surfaces of an injection nozzle (14) and the inner peripheral surfaces of the cavity (6) of a matrix (1) partially defining the mould cavity (4), is provided with two lips (49,50) in the direction of injection (2), one of which being internal and the other external, wherein at least the internal lip (50) is flush with an inner peripheral surface (8,9), which flares out towards the rear, of the cavity (6) of the matrix (1) in order to define a chamber in the matrix, said chamber (24) leading outwards via an injection opening (7), and a closed chamber (51). The amount of thermoplastic material which is lost with each colour change is reduced, tightness is increased vis à vis leakages and thermal insulation is improved between the nozzle (14) and the matrix (1).
IPC 8 full level
B29C 45/27 (2006.01)
CPC (source: EP)
B29C 45/27 (2013.01); B29C 2045/2759 (2013.01); B29C 2045/2761 (2013.01)
Citation (search report)
See references of WO 2006042942A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2876619 A1 20060421; FR 2876619 B1 20070105; EP 1799423 A1 20070627; WO 2006042942 A1 20060427; WO 2006042942 A8 20060713
DOCDB simple family (application)
FR 0410923 A 20041015; EP 05809095 A 20051013; FR 2005002537 W 20051013