NOZZLE FOR VACUUM FORMATION

Japanese Patent JP3648653

B2

PROBLEM TO BE SOLVED: To surely prevent liquid spill in vacuum formation of a pipe with a simply structured vacuum forming nozzle for which no driving means is used.
SOLUTION: In a vacuum forming nozzle N which is constituted of an engaging part 1 and a head part 2 and which is provided with a hole for injecting a forming liquid, the engaging part 1 is constituted of an engaging shaft part 11 formed integrally with the head part 2 and a slide member 12 slidable on the outer circumference of the engaging shaft part 11, the engaging shaft part 11 is formed in a tapered shape having the first, second, and third cylinder parts 111, 112, 113 each with a different outer diameter, the slide member 12 is provided with a small inside diameter part 122 engaging with the first cylinder part 111 and a large inside diameter part 21 engaging with the second cylinder part 112, a seal ring 8 which compression-deforms by a pressure from the slide member 12 is provided between the second cylinder part 112 and the large inside diameter part 21, and an atmospheric pressure chamber 8 in communication with the atmospheric air through a pressure relief hole 7 is also provided between the second cylinder part 112 and the large inside diameter part 21.

Hatano Hajime

JP22974196A

May 18, 2005

August 30, 1996

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Calsonic Kansei Co., Ltd.

B05B1/00; B21D26/02; B21D26/033; B21D26/045; (IPC1-7): B21D26/02; B05B1/00

JP61020633A
JP62199235A
JP5177275A
JP62179124U
JP1104330U

Satoru Asakura
Masamichi Ayata
Masao Nishimura

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