Apparatus for producing pneumatic tires
First Claim
1. An apparatus for producing pneumatic tires comprising at least three fittable mold components of an upper mold element, a lower mold element and a core mold element for defining a cavity having the shape of the tires, and means for feeding rubber or an equivalently elastic molding material to the cavity in an amount sufficient to fill the cavity, the core mold element comprising at least three divided fittable mold segments for forming the inner surfaces of the tire tread and tire sidewalls including a pair of beads, the tread inner surface forming mold segment and at least one of the sidewall inner surface forming mold segments having on their opposed faces nipping portions movable toward or away from each other for holding at least one end of each of tire cords.
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Accused Products
Abstract
A cavity having the shape of the tire to be produced is defined by a mold comprising an upper element, a lower element and a core element which are fittable to and releasable from one another. The core mold element comprises three divided segments, i.e., a segment for forming the inner surface of the tire tread, and a pair of segments for forming the inner surfaces of the tire sidewalls including tire beads. The core mold element has two pairs of nipping portions for holding the opposite ends of tire cords placed on the tread inner surface forming segment. The nipping portions in each pair are movable toward or away from each other. The tire cords nipped at their opposite ends by the core mold element are held in place within the cavity by the cooperation of the upper and lower mold elements, and a molding material composed of rubber or an equivalently elastic material is filled into the cavity and cured.
16 Citations
7 Claims
- 1. An apparatus for producing pneumatic tires comprising at least three fittable mold components of an upper mold element, a lower mold element and a core mold element for defining a cavity having the shape of the tires, and means for feeding rubber or an equivalently elastic molding material to the cavity in an amount sufficient to fill the cavity, the core mold element comprising at least three divided fittable mold segments for forming the inner surfaces of the tire tread and tire sidewalls including a pair of beads, the tread inner surface forming mold segment and at least one of the sidewall inner surface forming mold segments having on their opposed faces nipping portions movable toward or away from each other for holding at least one end of each of tire cords.
Specification