Process for producing a high density by high velocity compacting

Abstract

A method of producing a body from a particulate or solid material comprises filling a precompacting mould with the material, optionally vibrating the mould, pre-compacting the material and compressing it by at least one stroke with high kinetic energy in order to cause coalescence or high density of the material.

1 . A method of producing a body from particulate material by coalescence or compaction to higher density, characterised in that the method comprises the steps of 
 a) filling a pre-compacting mould with the material in the form of powder, pellets, grains or the like,    b) vibrating the mould,    c) pre-compacting the material at least once with a pre-compacting means and    d) compressing the material in a compression mould by at least one stroke, where a striking unit emits enough kinetic energy to form the body when striking the material inserted in the compression mould with a striking means, causing coalescence or higher density of the material.    
   
   
       2 . A method according to  claim 1 , characterised in that the pre-compacting mould and the compressing mould are the same mould.  
   
   
       3 . A method according to  claim 1 , characterised in that the pre-compacting c) is performed while vibrating the mould.  
   
   
       4 . A method according to  claim 1 , characterised in that 
 d) the material is compressed from two opposite sides simultaneously using two striking units.    
   
   
       5 . A method of producing a body from solid material by coalescence or compaction to higher density, characterised in that the method comprises the steps of 
 a) inserting the solid material in a mould,    c) possibly pre-compacting the material at least once with a pre-compacting means and    d) compressing the material in the mould by at least one stroke, from two sides simultaneously, using two striking units emitting enough kinetic energy to form the body when striking the material, causing coalescence or higher density of the material.    
   
   
       6 . A method according to  claim 1 , characterised in that the material is compressed from two opposite sides and at least one further side simultaneously using at least three striking units.  
   
   
       7 . A method according to  claim 2 , characterised in that the pre-compacting means is continuously applied against the material with the same or a higher pressure during the compression d) thereof with the striking unit or units.  
   
   
       8 . A method according to  claim 1 , characterised in that the energy of the compression d) is retained within the compressed material by e) maintaining or reapplying the striking means to press against the compressed material after the stroke or strokes.  
   
   
       9 . A method according to  claim 1 , characterised in that the temperature of the material in the mould is increased or decreased during one or more steps.  
   
   
       10 . A method according to  claim 9 , characterised in that the material in the mould is heated before and/or during the pre-compaction c.  
   
   
       11 . A method according to  claim 9 , characterised in that the material in the mould is heated before and/or during the compression d).  
   
   
       12 . A method according to  claim 10 , characterised in that the material in the mould is heated by the use of electrical current.  
   
   
       13 . A method according to  claim 12 , characterised in that the electrical current flow is syncronized with the pre-compaction c) and/or the compression stroke or strokes d).  
   
   
       14 . A method according to  claim 1 , characterised in that the material in the mould is subjected to a sub-atmospheric pressure before the pre-compaction c).  
   
   
       15 . A method according to  claim 1 , characterised in that the material in the mould or moulds is maintained under another gas than air.  
   
   
       16 . A method according to  claim 15 , characterised in that the gas is an inert gas.  
   
   
       17 . A method according to  claim 15 , characterised in that the gas is a reactive gas.  
   
   
       18 . A method according to  claim 1 , characterised in that the vibration b) is maintained during compressing d) and/or during energy retention e).  
   
   
       19 . A body produced by the method according to  claim 1 .  
   
   
       20 . A method according to  claim 5 , characterised in that the material is compressed from two opposite sides and at least one further side simultaneously using at least three striking units.