Method of integrally attaching hollow member to cast product by casting and apparatus therefor

A method of integrally attaching a hollow member to a cast product by casting so that the hollow member communicates with a hollow interior of the cast product, the method comprising the steps of:

• fitting an open end of the hollow member into a recess formed in a core for forming the hollow interior of the cast product, thereby closing the open end of the hollow member;
• pouring a molten metal about the core and fitted hollow member;
• and
• cutting off the end of the hollow member by a drawing force applied to the core subsequently to solidification of the molten metal, thereby drawing out the core.

A method of integrally attaching a hollow member to a cast product by casting so that the hollow member communicates with a hollow interior of the cast product, the method comprising the steps of:

• fitting an open end of the hollow member into a groove provided on a core for forming the hollow interior of the cast product, the groove having an open end at a core distal end side;
• pouring a molten metal about the core and fitted hollow member;
• and
• drawing out the core subsequently to solidification of the molten metal and simultaneously moving the hollow member along the groove so that the end of the hollow member is moved out of the groove through the open end of the groove, thereby releasing the hollow member from the fitting with the core.

An apparatus for integrally attaching a hollow member to a cast product by casting so that the hollow member communicates with a hollow interior of the cast product, the apparatus comprising:

• a core for forming the hollow interior of the cast product;
• a closure member to be fitted into an open end of the hollow member so that the open end of the hollow member is closed by the closure member, the closure member projecting from the core in a direction different from a direction in which the core is drawn out of the cast product;
• means for moving the closure member from a fitted position to a non-fitted position;
• and
• means for drawing out the core.