METHOD FOR MANUFACTURING HOLLOW POPPET VALVE

A method of manufacturing a hollow poppet valve capable of storing a large amount of a coolant in a hollow cavity of the valve. The hollow poppet valve has an internal cavity (S) which extends from within its valve head (14) into a valve stem portion (12) and is partly filled with a coolant (19). Th...

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Bibliographische Detailangaben
Hauptverfasser:	UCHIDA Shigeru, ISHII Kazuhiro, MEGURO Masahiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBINED OPERATIONS CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS PUNCHING METAL STEAM ENGINES TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	A method of manufacturing a hollow poppet valve capable of storing a large amount of a coolant in a hollow cavity of the valve. The hollow poppet valve has an internal cavity (S) which extends from within its valve head (14) into a valve stem portion (12) and is partly filled with a coolant (19). The method comprises; a step of forming a coolant rod (19a) by cutting clayish coolant (19) to a coolant rod of a predetermined length from the coolant material extruded from an extruder (20); a coolant-rod insertion step in which a coolant rod is inserted into a cavity formed in an intermediate valve product (11) through its opening; and a step of sealing the opening of the hole (S). In the coolant-rod insertion step, coolant-rods (19a, 19b) are inserted into the cavity (S) separately in multiple times. Since each coolant rod (9a) is short, it is little deformed or bent, so that it has little interference with the inner periphery of the cavity (S), which permits use of a thick rod and increase the amount of the coolant in the,cavity (S).