角度付き直管の製造方法

Japanese Patent JP7165614

B2

To smoothly produce an angled straight pipe P by centrifugal casting in such a manner that the vibration of a mold 11 thereof is suppressed.SOLUTION: A method for producing an angled straight pipe P composed of: a straight pipe part 1; a socket part 2 at one end thereof; and an insertion part 3 at the other end, in which the outer surface of the socket part is made parallel to a shaft center o of the straight pipe part, and further, the inner surface of the socket part is tilted at a required angle θ with the shaft center o of the straight pipe part 1 by centrifugal casting. At this time, a part of a core 18 is lacked, and the finishing allowance b3 of a black painted part is formed so that a cross-sectional primary moment around the shaft center o is made uniform. Upon production of the angled cast iron pipe P by centrifugal casting in a state where the core 18 is loaded on the socket part 2, the cross-sectional primary moment including the core 18 in the socket part 2 is made almost the same over the whole length of the mold shaft center o, and the centroid thereof is located on the shaft center o, thus a mold 11 rotates without being vibrated, and smooth casting can be performed. The socket part 2 of the cast iron pipe cast in this way is cut with the shaft center c as the center to obtain the angled cast iron pipe P.SELECTED DRAWING: Figure 1

JP2002153961

SPOUT FOR CENTRIFUGAL CASTING

Yuya Morita

JP2019063730A

November 04, 2022

March 28, 2019

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Kurimoto Iron Works Co., Ltd.

B22D13/10; B22D13/02; B22D25/02; F16L9/02

JP2014231063A
JP2003164953A
JP20105675A
JP60206546A

Naoya Kamada
Bunji Kamata
Yaichiro Nakatani
Takayuki Tagawa
Takashi Shimizu

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