Abstract: A production apparatus includes the following stations juxtaposed in the following sequence: a parison forming station for forming a parison; a built-in part attachment station where opposite sides of a center die provided with a built-in part are held between a pair of molding dies to locate the center die in the molding dies with the parison between the center die and the molding dies, and the built-in part being attached to the parison transferred to the molding dies; a molding station where the molding dies are closed to mold the hollow molded product; and a conveyance station for taking the hollow molded product out of the molding dies and conveying the hollow molded product. The center die is fixed at the built-in part attachment station, and the molding dies are configured to be movable back and forth between the built-in part attachment station and the molding station.

Abstract: A production apparatus includes the following stations juxtaposed in the following sequence: a parison forming station for forming a parison; a built-in part attachment station where opposite sides of a center die provided with a built-in part are held between a pair of molding dies to locate the center die in the molding dies with the parison between the center die and the molding dies, and the built-in part being attached to the parison transferred to the molding dies; a molding station where the molding dies are closed to mold the hollow molded product; and a conveyance station for taking the hollow molded product out of the molding dies and conveying the hollow molded product. The center die is fixed at the built-in part attachment station, and the molding dies are configured to be movable back and forth between the built-in part attachment station and the molding station.

Abstract: A production apparatus includes the following stations juxtaposed in the following sequence: a parison forming station for forming a parison; a built-in part attachment station where opposite sides of a center die provided with a built-in part are held between a pair of molding dies to locate the center die in the molding dies with the parison between the center die and the molding dies, and the built-in part being attached to the parison transferred to the molding dies; a molding station where the molding dies are closed to mold the hollow molded product; and a conveyance station for taking the hollow molded product out of the molding dies and conveying the hollow molded product. The center die is fixed at the built-in part attachment station, and the molding dies are configured to be movable back and forth between the built-in part attachment station and the molding station.

Abstract: The present invention provides a molding machine crosshead which uses one additional resin extruder and one base resin extruder that are connected to one annular flow channel of a crosshead unit at mutually different angular positions and which is configured to form a parison by adding an additional layer constituted by an additional resin from the additional resin extruder to a base layer constituted by a base resin supplied from the base resin extruder into the annular flow channel, the additional resin being a material different from the base resin, wherein the additional resin is formed in a linear shape along the longitudinal direction of the parison as part of the parison.

Abstract: In a crosshead, a pair of sheets (7) are formed by bisecting a parison (3) suspended from a resin flow passage (30) formed between a core (9) and a die (8) by causing a first dividing body (33) of a separator (5, 5a) provided on the core (9) or the die (8) to contact a second dividing body (40) provided on the core (9) or the die (8).

Abstract: In a crosshead, a pair of sheets (7) are formed by bisecting a parison (3) suspended from a resin flow passage (30) formed between a core (9) and a die (8) by causing a first dividing body (33) of a separator (5, 5a) provided on the core (9) or the die (8) to contact a second dividing body (40) provided on the core (9) or the die (8).

Abstract: A guide device 3 for smoothing into a shape of a flat plate a parison P having a semi-circular shape in a planar cross-section, the parison being extruded from an extrusion device 1 and divided into two by a cutter 2, wherein the guide device includes a spiral guide element 4 that is in contact with the parison P while rotating about an axis, the spiral guide element being formed so as to rotate in opposite directions with each other on the left and right of a middle part 4C as a boundary so as to expand the parison P to the left and right. The spiral guide element 4 is formed in a protruding shape on an outer periphery of a shaft 5 rotated by the driving of a drive motor M.

Abstract: A production apparatus includes the following stations juxtaposed in the following sequence: a parison forming station for forming a parison; a built-in part attachment station where opposite sides of a center die provided with a built-in part are held between a pair of molding dies to locate the center die in the molding dies with the parison between the center die and the molding dies, and the built-in part being attached to the parison transferred to the molding dies; a molding station where the molding dies are closed to mold the hollow molded product; and a conveyance station for taking the hollow molded product out of the molding dies and conveying the hollow molded product. The center die is fixed at the built-in part attachment station, and the molding dies are configured to be movable back and forth between the built-in part attachment station and the molding station.