Process and machine for producing metal alloy components

Abstract

Machine for making metal alloy components through moulding comprising a lower half-mould and an upper half-mould that can be coupled with each other so as to form the shape of at least one of said metal alloy components, a device for supplying the molten alloy in said lower half-mould. Said lower half-mould comprises a pair of identical impressions that communicate with each other through a central channel, so that said supply device fills both of the impressions with a single cast.

1 . Process for producing metal alloy components comprising the following steps: 
 casting a predetermined amount of molten metal alloy in a lower half-mould comprising at least a pair of impressions having the same shape and connected together by a central channel,    moving an upper half-mould in the direction of said lower half-mould,    recovering a predetermined amount of molten metal alloy coming out from said lower half-mould during the closing step of the mould,    closing the upper half-mould on said lower half-mould and moulding said component,    removing the component realized in the mould.    
   
   
       2 . Process according to  claim 1 , wherein said recovery step comprises 
 channelling said predetermined amount of alloy,    exerting a predetermines counter-pressure on said channel so as to regulate said amount of molten alloy.    
   
   
       3 . Process according to  claim 1 , further comprising the steps of: 
 solution heat treating the moulded component,    tempering the moulded component.    
   
   
       4 . Toe-cap for accident prevention shoes, characterised in that it is made from an aluminiun alloy comprising from 3.5 to 4% copper, less than 0.1% silicon, from 0.4 to 0.5% magnesium, from 0.15 to 0.2% zitanium and about 0.16% iron.  
   
   
       5 . Toe-cap for accident prevention shoes according to  claim 4 , comprising a plurality of through holes made in predetermined positions of said toe-cap.  
   
   
       6 . Machine for making metal alloy components through moulding comprising 
 a lower half-mould and an upper half-mould that can be coupled with each other so as to form the shape of at least one of said metal alloy components,    a device for supplying the molten alloy in said lower half-mould, characterised in that said lower half-mould comprises at least a pair of identical impressions that communicate with each other through a central channel, so that said supply device fills both of the impressions with a single cast.    
   
   
       7 . Machine for making metal alloy components through moulding comprising 
 a lower half-mould and an upper half-mould that can be coupled with each other so as to form the shape of at least one of said metal alloy components,    a device for supplying the molten alloy in said lower half-mould, characterised in that it comprises a compensation and recovery device of the possible excess material cast in the lower half-mould during the moulding step of the component.    
   
   
       8 . Machine according to  claim 7 , wherein said lower half-mould comprises at least a pair of identical impressions that communicate with each other through a central channel, so that said supply device fills both of the impressions with a single cast.  
   
   
       9 . Machine according to  claim 7 , wherein said compensation device comprises a hydraulic circuit including a counter-pressure piston, a recovery channel, connected at one of its ends with said piston and at the opposite end being associated with a peripheral portion of said logier half-mould.  
   
   
       10 . Machine according to  claim 7 , wherein the movement of said piston is controlled by an oleodynamic circuit.  
   
   
       11 . Machine according to  claim 10 , wherein said oleodynamic circuit comprises a chamber in which said piston is inserted, filled with a fluid both above and below the piston through a pair of supply channels and from a supply pump, said piston being arranged in an intermediate position, and such a pimp being suitable for keeping a constant pressure of the fluid in said chamber and a constant pressure on said piston.  
   
   
       12 . Machine according to  claim 8 , wherein said counter-pressure piston is arranged in the lower press plane close to said central channel, and has a preloaded spring that allows the upward movement of the piston once the upper press plane was been lifted, so as to carry out the function of ejecting the toe-caps from the lower half-mould once the moulding step is complete.  
   
   
       13 . Machine according to  claim 7 , wherein said compensation and recovery device comprises a recovery channel of the excess molten metal.