Die apparatus, method for producing perforated work plate, perforated work plate, liquid-jet head and liquid-jet apparatus

Abstract

A die apparatus is composed of a lower receiving die, a round punch having the shape of a fine hole, and PET provided between the lower receiving die and the round punch. The round punch is passed through a work plate placed on the PET to cause a punched-out piece to remain within the PET, thereby boring the fine hole. The work plate having such fine holes is thus easily prepared, and applied as a filter for a liquid-jet head.

1 . A die apparatus for boring a through-hole in a work plate, comprising a lower receiving die, a punch, and a flexible member provided between the lower receiving die and the punch, and wherein the punch is passed through the work plate placed on the flexible member to press a punched-out piece into an interior of the flexible member, thereby boring the through-hole in the work plate.  
   
   
       2 . The die apparatus according to  claim 1 , wherein the flexible member is a polymer material.  
   
   
       3 . The die apparatus according to  claim 1 , wherein a thickness of the flexible member is twice or more a thickness of the work plate.  
   
   
       4 . The die apparatus according to  claim 1 , wherein a surface of the lower receiving die facing the flexible member is flat.  
   
   
       5 . A method for producing a perforated work plate by use of a punch and a lower receiving die, comprising passing the punch through the work plate placed on a flexible member to press a punched-out piece into an interior of the flexible member, thereby boring a through-hole in the work plate.  
   
   
       6 . The method for producing a perforated work plate according to  claim 5 , wherein a surface of the lower receiving die facing the flexible member is flat.  
   
   
       7 . The method for producing a perforated work plate according to  claim 5 , wherein the punched-out piece pressed into the interior of the flexible member is allowed to remain in the interior of the flexible member when the punch is pulled out of the flexible member.  
   
   
       8 . A perforated work plate formed by the method for producing a perforated work plate according to  claim 5 .  
   
   
       9 . A perforated work plate formed by the method for producing a perforated work plate according to  claim 6 .  
   
   
       10 . A perforated work plate formed by the method for producing a perforated work plate according to  claim 7 .  
   
   
       11 . A liquid-jet head having a pressure generating chamber and a nozzle orifice, and including the perforated work plate according to  claim 8  for use in a filter for the liquid-jet head which traps foreign matter contained in a liquid to be supplied to the pressure generating chamber.  
   
   
       12 . The liquid-jet head according to  claim 11 , wherein the filter for the liquid-jet head is a filter sheet consisting of a metal film alone, has a plurality of the through-holes formed in the filter, and has irregularity lines formed on a surface of the filter, the irregularity lines extending in a lattice pattern.  
   
   
       13 . The liquid-jet head according to  claim 12 , wherein a size of the through-hole of the filter is a size of the nozzle orifice or smaller.  
   
   
       14 . A liquid-jet apparatus including the liquid-jet head according to  claim 12 .  
   
   
       15 . A liquid-jet apparatus including the liquid-jet head according to  claim 13.