Structure for producing casting

Abstract

A cylindrical structure for producing a casting can comprise: a cylindrical main body having a body part and a female joint consecutively connected to the body part and having an inner diameter larger than an outer diameter of the body part. A body inside cover layer can cover the inner face of the body part and/or an outside cover layer can cover an outer face of the female joint

1 . A cylindrical structure for producing a casting comprising a cylindrical main body, wherein
 the cylindrical main body includes:
 a body part, and 
 a female joint consecutively connected to the body part and having an inner diameter equal to or larger than an outer diameter of the body part, and 
   the cylindrical structure comprises:
 a body inside cover layer covering an inner face of the body part of the cylindrical main body, and 
 an outside cover layer covering an outer face of the female joint of the cylindrical main body. 
   
     
     
         2 . The structure for producing a casting according to  claim 1 , wherein the outside cover layer covers an entire region of the outer face of the female joint. 
     
     
         3 . The structure for producing a casting according to  claim 1 , further comprising:
 a female joint inside cover layer covering an inner face of the female joint.   
     
     
         4 . The structure for producing a casting according to  claim 3 , wherein the female joint inside cover layer and the body inside cover layer are continuous. 
     
     
         5 . The structure for producing a casting according to  claim 3 , wherein the female joint inside cover layer extends to the inner face of the body part, and partially overlaps with the body inside cover layer. 
     
     
         6 . The structure for producing a casting according to  claim 5 , wherein
 the female joint inside cover layer is arranged on an inner side relative to the body inside cover layer, in a radial direction of the structure for producing a casting in a portion where the female joint inside cover layer and the body inside cover layer overlap with each other, and/or   the portion, where the female joint inside cover layer and the body inside cover layer overlap with each other, has a thickness larger than both thicknesses of a portion having a largest thickness in the female joint inside cover layer and a portion having a largest thickness in the body inside cover layer.   
     
     
         7 . The structure for producing a casting according to  claim 3 ,
 wherein the female joint inside cover layer covers an entire region of the inner face of the female joint, and   the body inside cover layer covers an entire region of the inner face of the body part.   
     
     
         8 . The structure for producing a casting according to  claim 1 , further comprising: an end face cover covering an end face of the female joint. 
     
     
         9 . The structure for producing a casting according to  claim 1 , further comprising:
 a female joint inside cover layer covering an inner face of the female joint; and   an end face cover covering an end face of the female joint,   wherein the end face cover and the female joint inside cover layer are continuous.   
     
     
         10 . The structure for producing a casting according to  claim 1 , wherein the outside cover layer extends to the inner face of the body part through an end face of the female joint. 
     
     
         11 . The structure for producing a casting according to  claim 1 , wherein
 an end part of the structure for producing a casting other than the female joint has an outer diameter equal to or smaller than the inner diameter of the female joint,   an outer diameter of the female joint is the largest among outer diameters of the structure for producing the casting, and
 the inner diameter of the female joint is the largest among inner diameters of the structure for producing the casting. 
   
     
     
         12 . A cylindrical structure for producing a casting comprising a cylindrical main body, wherein
 the cylindrical main body includes:
 a body part, and 
 a male joint in one end part of the body part, 
   the male joint is to be internally joined to a female joint,   the male joint has an outer diameter equal to or smaller than an inner diameter of the female joint, and
 the cylindrical structure comprises: 
 a body inside cover layer covering an inner face of the body part of the cylindrical main body, and 
 an outside cover layer covering an outer face of the male joint of the cylindrical body. 
   
     
     
         13 . The structure for producing a casting according to  claim 12 , further comprising an end face cover covering an end face of the male joint. 
     
     
         14 . The structure for producing a casting according to  claim 13 , wherein the end face cover and the outside cover layer are continuous. 
     
     
         15 . The structure for producing a casting according to  claim 13 , wherein
 the main body has a female joint consecutively connected to the body part and having an inner diameter equal to or larger than an outer diameter of the body part,   the outer diameter of the male joint is equal to or smaller than the inner diameter of the female joint consecutively connected to the body part,   an outer diameter of the female joint is the largest among outer diameters of the structure for producing the casting, and
 the inner diameter of the female joint is the largest among inner diameters of the structure for producing the casting. 
   
     
     
         16 . The structure for producing a casting according to  claim 13 , wherein the body inside cover layer covers an entire region of the inner face of the body part. 
     
     
         17 . A method for producing a cylindrical structure for producing a casting, wherein
 the structure for producing a casting comprises a cylindrical main body,   the cylindrical main body includes:
 a body part, and 
 a female joint consecutively connected to the body part in an axial direction, 
   the female joint has an inner diameter equal to or larger than an outer diameter of the body part, and   the method comprises:
 applying a first coating composition to an inner face of the body part to form a body inside cover layer covering the inner face of the body part; and 
 applying a second coating composition to an outer face of the female joint over an entire circumference of the female joint to form an outside cover layer covering the outer face of the female joint. 
   
     
     
         18 . The method for producing a structure for producing a casting according to  claim 17 , wherein
 the first coating composition is applied by pouring the first coating composition into the body part from an end part side of the body part other than an end part on a side of the female joint, and   the second coating composition is applied to an inner face of the female joint over the entire circumference of the female joint to form a female joint inside cover layer covering the inner face of the female joint.   
     
     
         19 . The method for producing a structure for producing a casting according to  claim 18 , wherein the second coating composition is applied by dipping the female joint in the second coating composition. 
     
     
         20 . The method for producing a structure for producing a casting according to  claim 17 , wherein the second coating composition is applied after the application of the first coating composition.