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1. PT1102670 - ACTUADOR PARA OBTURADOR DE VALVULA DE MOLDACAO POR INJECCAO

Office Portugal
Application Number 99966393
Application Date 17.12.1999
Publication Number 1102670
Publication Date 31.01.2005
Publication Kind E
IPC
B29C 45/28
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
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels
28Closure devices therefor
CPC
B29C 45/281
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
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
28Closure devices therefor
2806consisting of needle valve systems
281Drive means therefor
B29C 2045/2831
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
17Component parts, details or accessories; Auxiliary operations
26Moulds
27Sprue channels ; Runner channels or runner nozzles
28Closure devices therefor
2806consisting of needle valve systems
281Drive means therefor
2831Needle valves driven by a cam
Applicants DME CO
Inventors STEIL FREDERICK G
TORTIS STEPHEN T
Priority Data 09217295 21.12.1998 US
Title
(PT) ACTUADOR PARA OBTURADOR DE VALVULA DE MOLDACAO POR INJECCAO
Abstract
(EN)
A valve (10) for controlling the flow of fluent plastic material from an injection molding machine to a mold cavity. The valve includes an axially slidable valve pin (38) that interacts with a material outlet (17) to control flow through the valve selectively. The valve pin is actuated by an eccentric cam arrangement (60) that positively drives the valve pin between positions where it is engaged with or disengaged from the material outlet. The cam acts on the valve pin only in an axial direction to avoid wear occasioned by side loads imposed on a valve pin.

(FR)
L'invention concerne un obturateur (10) servant à régler le flux de matière plastique s'écoulant d'une machine de moulage par injection vers une cavité de moule. L'obturateur comporte une tige d'obturateur coulissant dans le sens axial (38), qui interagit avec un orifice de sortie de matière (17) de façon à régler de manière sélective l'écoulement à travers l'obturateur. La tige d'obturateur est actionnée par un dispositif de came excentrique (60) qui entraîne directement la tige d'obturateur dans des positions d'engagement ou de désengagement de l'orifice de sortie de matière. La came n'agit sur la tige d'obturateur que dans un sens axial afin d'éviter une usure provoquée par des charges latérales sur la tige d'obturateur.