Hollow sole for footwear and manufacturing method therefor

Abstract

Footwear sole comprising a top half with hollow vertical configurations and a bottom half, wherein said configurations are filled to at least half of their volume with a shock-absorbing plastic material to absorb as great a range of possible loads with a simple and easily adjustable configuration.

1 . Hollow sole for footwear that comprises a bottom half ( 1 ) and a top half ( 2 ), the top half ( 2 ) in turn comprising a sheet ( 2 . 1 ) and hollow vertical configurations ( 2 . 2 ) that define internal pockets ( 2 . 3 ), the hollow base being integrated in said sheet ( 2 . 1 ), said hollow vertical configurations ( 2 . 2 )being oriented towards the inside of the sole, the bottom half ( 1 ) being disposed such that it contacts the surfaces of the hollow vertical configurations ( 2 . 2 ) that face the inside of the sole, characterised in that the internal pockets ( 2 . 3 ) of the hollow vertical configurations ( 2 . 2 ) of the top half ( 2 ) are half-filled by a shock-absorbing plastic material ( 3 ). 
     
     
         2 . Hollow sole for footwear according to  claim 1 , characterised in that the bottom half ( 1 ) comprises a sheet ( 1 . 1 ) and hollow vertical configurations ( 1 . 2 ), which form internal pockets ( 1 . 3 ), the base being integrated in said sheet ( 1 . 1 ) so that said hollow vertical configurations ( 1 . 2 ) face the inside of the sole such that they contact the surfaces of the hollow configurations ( 1 . 2 , 2 . 2 ) facing the inside of the sole in each of the halves ( 1 , 2 ). 
     
     
         3 . Hollow sole for footwear according to  claim 1  or  2 , characterised in that the hollow vertical configurations ( 1 . 2 , 2 . 2 ) are truncated pyramids, truncated cones, cylinders or prisms. 
     
     
         4 . Hollow sole for footwear according to  claim 1  or  2 , characterised in that the hollow vertical configurations ( 2 . 2 ) of the top half ( 2 ) are filled up to the top surface of the top half ( 2 ). 
     
     
         5 . Hollow sole for footwear according to  claim 1  or  2 , characterised in that the hollow vertical configurations ( 2 . 2 ) of the top half ( 2 ) are filled beyond the upper surface of the top half ( 2 ), so that a sheet ( 3 . 1 ) is created above the top half ( 2 ) made of the shock-absorbing plastic material ( 3 ). 
     
     
         6 . Hollow sole for footwear according to  claim 1  or  2 , characterised in that the hollow vertical configurations ( 2 . 2 ) of the top half ( 2 ) are filled such that a gas chamber ( 4 ) is left between the front of the shock-absorbing material ( 3 ) and the free surface ( 2 . 2 . 1 ) of the hollow vertical configurations ( 2 . 2 ). 
     
     
         7 . Hollow sole for footwear according to the above claims, characterised in that the shock-absorbing plastic material ( 3 ) is polyurethane. 
     
     
         8 . Hollow sole for footwear according to  claim 1  or  2 , characterised in that the sheet ( 2 . 1 ) of the top half ( 2 ) includes through orifices ( 2 . 4 ). 
     
     
         9 . Hollow sole for footwear according to  claim 8 , characterised in that the sheet ( 3 . 1 ) above the top half ( 2 ) of the shock-absorbing plastic material ( 3 ), this half ( 2 ) has through orifices ( 3 . 2 ) that coincide with the through orifices ( 2 . 4 ) of the sheet ( 2 . 1 ) of the top half ( 2 ). 
     
     
         10 . Manufacturing method for a footwear sole according to the above claims, characterised in that it comprises the following stages:
 moulding the top half ( 2 ),   moulding the bottom half ( 1 ),   joining the two halves ( 1 , 2 ),   introducing the shock-absorbing material ( 3 ) to the top half ( 2 ) by injection or casting.   
     
     
         11 . Manufacturing method for a footwear sole according to  claim 10 , characterised in that before introducing the shock-absorbing material ( 3 ) in the top half ( 2 ) the shoe cut is placed flush on the top half ( 2 ). 
     
     
         12 . Manufacturing method for a footwear sole according to  claim 10 , characterised in that before introducing the shock-absorbing material ( 3 ) in the top half ( 2 ), a countermould is placed to leave a space between the top half ( 2 ) and said countermould so that the shock-absorbing material ( 3 ) forms approximately a sheet ( 3 . 1 ) on the top half ( 2 ) of the sole. 
     
     
         13 . Manufacturing method for a footwear sole according to  claim 10 , characterised in that the shock-absorbing plastic material ( 3 ) is polyurethane.