Patent ID: 8894909
Filing Date: 2014-11-25
Classification: A43B,B29C,B29D,F16K

Abstract:
1. Valve for introducing a gas and punching plastic in moulds used to make hollow footwear soles, characterised in that it is linearly actuated and comprises a casing ( 1 ) attached to the mould ( 6 . 1 ) inside which it houses a valve body ( 2 ), a helical spring ( 3 ), a stop ( 4 ) and means ( 5 ) for attaching the valve body to the stop, the casing ( 1 ) is cylindrical and has attachment means ( 1 . 1 ) on its rear part and punching means ( 1 . 2 ) on its front part, the valve body ( 2 ) runs inside the casing ( 1 ) and comprises a head ( 2 . 1 ) and a stem ( 2 . 2 ), the means ( 5 ) for attaching the valve body to the stop consist in a screw whose fillet is introduced in a first thread of the valve body stem ( 2 . 2 ), said valve body ( 2 ) being attached to the stop ( 4 ) by the means ( 5 ) for attaching the valve body to the stop, so that the helical spring ( 3 ) is crossed by the valve body stem ( 2 . 2 ) and limited on its front end by the casing ( 1 ) and on its rear end by the stop ( 4 ), the gas running between the valve body ( 2 ) and the casing ( 1 ), the valve body head ( 2 . 1 ) effecting a seal in a seat ( 1 . 3 ) in the front part of the casing ( 1 ), the punching means ( 1 . 2 ) surround the seat ( 1 . 3 ) and are farther forward than the front end of the valve body head ( 2 . 1 ) such that when the front part of the casing meets the plastic ( 7 ) it does so first with the punching means ( 1 . 2 ) in order to punch the plastic ( 7 ).