Abstract: A die casting machine of an embodiment includes: a holding furnace holding molten metal; a sleeve located outside the holding furnace and having a molten metal supply port passing through a mold; a plunger sliding through the sleeve and including a plunger rod and a plunger tip fixed to a tip of the plunger rod; a molten metal supply pipe pushed against the sleeve to cover the molten metal supply port and supplying the molten metal into the sleeve; and a pushing force variable mechanism reducing a pushing force for the sleeve in the molten metal supply pipe when the plunger is sliding.

Abstract: [OBJECT] To provide a network system which makes it possible to reduce the occurrence of a delay in data packet transfer processing even if periodic processing occurs. [ORGANIZATION] In a network system having a plurality of communication devices 10-1 to 10-5, the communication devices each include: an executing means (control part 12) that executes periodic processing whose processing occurs periodically; and an adjusting means (control part 12) that adjusts an execution timing at which the periodic processing is executed by the executing means, according to states of the other communication devices.