Resin panel and forming method
AssigneeKyoraku Co., Ltd.
InventorsTakehiko Sumi, Kiyotaka Kawai
Life of this patent
Estimating the term…
Abstract
A resin panel of which contact surfaces of a rear wall to be in contact with another member are made unlikely to deform while reducing the weight of the resin panel. The panel includes a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, the resin panel including a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall, wherein a wall thickness of the front wall is generally equal to or smaller than a wall thickness of the rear wall.
Claims19
1-18. (canceled)
A resin panel comprising a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween,
- the resin panel comprising a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall,
- wherein a wall thickness of the front wall is generally equal to or smaller than a wall thickness of the rear wall.
A resin panel comprising a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, with the rear wall and the front wall being formed by the same resin,
- the resin panel comprising a plurality of ribs obtained by indenting parts of the rear wall toward the front wall and welding the parts to an inner surface of the front wall,
- wherein the front wall is lighter than the rear wall.
A molding method for molding a resin panel including a rear wall having a plurality of contact surfaces to be in contact with another member, and a front wall opposing the rear wall with an interval therebetween, the method comprising:
- an extrusion step of extruding a first molten resin sheet and a second molten resin sheet so that the first molten resin sheet forming the rear wall is located on one split mold side and the second molten resin sheet forming the front wall is located on other split mold side, and so that a wall thickness of the second molten resin sheet is smaller than a wall thickness of the first molten resin sheet, wherein a cavity of the one split mold includes a plurality of protruding portions protruding toward the other split mold;
- a shaping step of shaping the first molten resin sheet into a shape conforming to the cavity of the one split mold, and stretching the first molten resin sheet into a shape conforming to the protruding portion, thereby forming ribs;
- and
- a clamping step of clamping the pair of split molds together so as to weld together edges of the first molten resin sheet forming the rear wall and the second molten resin sheet forming the front wall and weld a tip of the ribs formed on the first molten resin sheet to the second molten resin sheet, thereby molding the resin panel.
Dependencies are inferred from the claim text.