| 摘要 |
Provided is a molten metal holding furnace that combines heat dissipation properties and heat retaining properties. An insertion through-hole 20 of a molten metal holding furnace 10 has an inner cylindrical portion (tapered surface) 21 and an outer cylindrical portion 22 (cylindrical surface). A heating tube 30 has a tip-side cylindrical portion 35 that corresponds to the inner cylindrical portion 21 and a base end-side cylindrical portion 36 that corresponds to the outer cylindrical portion 22. The heating tube 30 is positioned by being inserted into the insertion through-hole with the tip-side cylindrical portion 35 positioned at the inner cylindrical portion 21 and the base end-side cylindrical portion 36 positioned at the outer cylindrical portion 22, and a filling material 60 is filled into the space between the heating tube 30 and the insertion through-hole 20. |
