Patent ID: 6066274
Filing Date: 2000-05-23
Classification: A61C,A61F,B22F,B28B,B29C

Abstract:
A process for injection molding a dental product, the process comprising:utilizing a tool including a molding space for the dental product, a first model for a base of the dental product and a second model for a shell of the dental product;applying the first model to a first tool part for forming a first delimitation surface with an upper surface of the first model;applying the second model to the first model;arranging a member that forms a molding space around at least the first model;injecting a wet composition containing heat-conducting particles into the molding space such that the second model is enclosed by the wet composition;solidifying the wet composition, pores being established in the solidified wet composition;allocating a function of a second tool part to the solidified material, wherein the second tool part can cooperate with the first tool part and wherein a second delimitation surface of the molding space is formed by an upper surface of the second model;separating the first tool part and the second tool part;removing the second model;bring together the first tool part and the second tool part;introducing into the molding space a material for forming the dental product; andhardening the material for forming the dental product, wherein heat removal from the material for forming the dental product is effected by the heat-conducting particles, wherein gas trapped in the material for forming the dental product is conducted away by the pores established in the solidified wet composition, and wherein breaking of the product is prevented by well balancing the porosity of the solidified wet composition and a flexibility of the material for forming the dental product after solidification of the material.