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AssigneeNippon Shokubai Co., Ltd.
InventorsHiroshi Okamoto, Takaaki Kawano, Toshiyuki Tsujiuchi, Hidenori Katayama
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A centrifugal molding method which can smooth the inner surface of the resin concrete layer of a resin concrete pipe or of a composite pipe having a resin concrete layer even without using any special sand conditioning mechanism and which is high in productivity includes producing a composite pipe having a resin concrete layer or producing a resin concrete pipe by moving an arm member of a pipe material feeding device forward and backward axially through a pipe forming outer mold rotating about an axis thereof and by feeding pipe materials from a discharge port formed in a front end of the arm member. The resin concrete layer is formed by feeding resin and aggregate to a mixing portion provided at the front end of the arm member through separate feed routes, mixing the two in the mixing portion and discharging the resulting mixed resin concrete material from the discharge port.
A centrifugal molding method of producing a composite pipe having a resin concrete layer by moving an arm member of a pipe material feeding device forward and backward axially through a pipe forming outer mold which rotates about an axis of said arm member of said material feeding device and by discharging pipe materials from a discharge port formed in a front end of said arm member into said rotating pipe forming outer mold, which further comprises:
A centrifugal molding method of producing a resin concrete pipe by moving an arm member of a pipe material feeding device forward and backward axially through a pipe forming outer mold which rotates about an axis of said arm member of said material feeding device and by discharging pipe materials from a discharge port formed in a front end of said arm member against said rotating pipe forming outer mold, which further comprises:
Dependencies are inferred from the claim text.