PURPOSE: To maintain good sealing of preliminary vacuum chamber and improve service durability of seal rolls and ripple members, by affixing elastomer body to the edges of seal rolls in such a manner that said body may project a little above the surface of the roll.
CONSTITUTION: The titled apparatus is a vacuum plasma treatment equipment for plastic molding consisting of a vacuum treating chamber 1 and preliminary vacuum chambers 2, 3 equipped with at least two pairs of seal rolls 16, 17 in the direction of passage of molding, with the ripple members 19 abutted to the rolls in the axial direction. Annular recesses are cut on the outer periphery of the upper seal roll 16 and an elastomer body 20 (e.g. silicone rubber) is fixed in it so as to project a little above the surface of the roll. Sealing is accomplished by pressing the elastomer body 20 of the upper roll 16 against the lower roll 17. Thus good sealing of preliminary vacuum chamber is insured and frictional force and consequently frictional resistance between seal rolls and ripple members are reduced, leading to prevention of damage to and improved service durability of seal rolls and ripple members 19.
UENO SUSUMU
KAMATA HIDEAKI
TOUKAI MASAYA
HATA YOSHITADA
KATOU KENICHI
HITACHI LTD