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US 7,252,488 B2Granted
Forming mold
AssigneeSumitomo Rubber Industries, Ltd.
InventorYoshiyuki Nakai
Life of this patent
Estimating the term…
Abstract
A mold used to form a rubber or resin article which includes a shaping surface for shaping a surface of an object to be molded, and a vent structure for releasing air between the shaping surface and the surface, wherein the vent structure includes EDM vents each having a gap of not more than 0.1 mm at the shaping surface.
Claims12
A forming mold comprising
- a shaping surface for shaping a surface of an object to be molded, said shaping surface provided with at least one protrusion, and
- a vent structure for releasing air between the shaping surface and said surface, wherein
- said vent structure includes EDM vents each having a gap of not more than 0.1 mm at the shaping surface, and
- said EDM vents include at least one EDM vent running on the shaping surface, cutting across said at least one protrusion.
1 more element
A forming mold comprising:
- a shaping surface for shaping a surface of an object to be molded, and
- a vent structure for releasing air between the shaping surface and said surface, wherein
- said vent structure includes EDM vents each having a gap of not more than 0.1 mm at the shaping surface,
- said shaping surface is provided with a slit vent defined as a gap between at least two parts of the mold,
- said EDM vents include EDM vents extending radially from the slit vent, wherein
- said slit vent is an annular slit vent formed between a hole and an insert therein.
3 more elements
A forming mold comprising
- a shaping surface for shaping a surface of an object to be molded, and
- a vent structure for releasing air between the shaping surface and side surface,
- said vent structure including EDM vents each having a gap of not more than 0.1 mm at the shaping surface, wherein
- said object is a resin coated golf ball,
- said shaping surface is provided with protrusions for forming dimples of the golf ball, each said protrusion having a spherical surface,
- along the edge of said spherical surface, an annular slit vent is provided, and
- two or more of the EDM vents extend radially from the annular slit vent.
4 more elements
A forming mold for a tire which comprises:
- a shaping surface for shaping a surface of the tire to be molded, said shaping surface containing a plurality of circumferentially extending ribs and a plurality of radially extending ribs which define a plurality of tire segments, and
- a vent structure for releasing air from between the shaping surface and the surface of the tire being molded and between tire segments, wherein
- said vent structure including a plurality of EDM vents which cut across the circumferentially extending ribs radially extending ribs and extend across the entire thickness of the tire segments from the shaping surface to the outer surface of the mold for venting the mold.
Dependencies are inferred from the claim text.