Injection moulding tool and method for production thereof

Abstract

An inventive method for the production of a metal mould in order to manufacture a limited amount of mass-produced injection moulded parts comprised of producing a moulded part by means of injected powder moulding based on a model for said injection moulded part and in producing a tool therefrom by means of debinding and sintering.

1 . Method for the production of a metal injection mould for the limited mass production of injection moulded parts with dimensions typically greater than 1 mm, characterized in that: 
 (a) a model of the injection moulded part to be manufactured is placed in a standard casting mould,    (b) powder is injected into the mould with the model in position,    (c) the moulded part formed is debound and    (d) the debound moulded part is sintered.    
     
     
         2 . Method for the production of an injection mould according to  claim 1 , characterized in that the moulded part is finished prior to debinding.  
     
     
         3 . Method for the production of an injection mould according to  claim 1 , characterized in that the model is produced by the so-called rapid prototyping method, e.g. by means of stereolithography.  
     
     
         4 . Metal injection mould for the limited mass production of injection moulded parts, characterized in that it is produced by a method according to one of claims  1 - 3 .  
     
     
         5 . Application of the injected powder moulding method to the production of a metal injection mould for the limited mass production of injection moulded parts.