Metal mold for centrifugal casting

Abstract

A metal mold for centrifugal casting, the exterior surface of which is provided with a coating in the form of an iron oxide film or a film containing calcium as the main ingredient. Such a coating is preferably formed so as to substantially cover the entire exterior surface. If the coating is an iron oxide film, it is preferable for the film to contain triiron tetraoxide. If the coating is a film containing calcium as the main ingredient, it is preferable for the thickness thereof to be at most 0.4 mm. Furthermore, among films containing calcium as the main ingredient, it is preferable for said main ingredient to be calcium carbonate. By configuring a mold for centrifugal casting in such a manner, the exterior surface of the metal mold can be uniformly cooled, and deformation of the mold can be suppressed.

1 . A metal mold for centrifugal casting, comprising:
 a coating on an exterior surface,   wherein the coating is an iron oxide film or a film containing calcium as a main ingredient.   
     
     
         2 . The metal mold for centrifugal casting according to  claim 1 , wherein the coating is formed to cover substantially the entire surface of the exterior surface. 
     
     
         3 . The metal mold for centrifugal casting according to  claim 1 , wherein the coating is a film containing triiron tetraoxide in the iron oxide film. 
     
     
         4 . The metal mold for centrifugal casting according to  claim 1 , wherein the coating is a film containing calcium as the main ingredient and a thickness thereof is 0.4 mm or less. 
     
     
         5 . The metal mold for centrifugal casting according to  claim 1 , wherein the coating is a film containing calcium carbonate as a main ingredient in the film containing calcium as the main ingredient. 
     
     
         6 . The metal mold for centrifugal casting according to  claim 2 , wherein the coating is a film containing triiron tetraoxide in the iron oxide film. 
     
     
         7 . The metal mold for centrifugal casting according to  claim 2 , wherein the coating is a film containing calcium as the main ingredient and a thickness thereof is 0.4 mm or less. 
     
     
         8 . The metal mold for centrifugal casting according to  claim 2 , wherein the coating is a film containing calcium carbonate as a main ingredient in the film containing calcium as the main ingredient. 
     
     
         9 . The metal mold for centrifugal casting according to  claim 3 , wherein the coating is a film containing calcium carbonate as a main ingredient in the film containing calcium as the main ingredient. 
     
     
         10 . The metal mold for centrifugal casting according to  claim 4 , wherein the coating is a film containing calcium carbonate as a main ingredient in the film containing calcium as the main ingredient.