Apparatus and Method for Rotationally Molding an Item

    公开(公告)号:US20240009898A1

    公开(公告)日:2024-01-11

    申请号:US17860758

    申请日:2022-07-08

    摘要: A plate assembly for increasing the efficiency and safety of a rotational molding machine. The plate assembly includes a mold plate that is coupled to a mold and mold frame, and an arm plate that is coupled to a distal end of rotating arm portion of the rotational molding machine. The mold plate includes means for being rotated relative to the arm plate that the mold plate may be selectively engaged to the arm plate. The mold plate and by extension the mold are locked into position via a plurality of coupling means disposed on the arm plate. Once secured, the rotational molding process is carried out by the rotational molding machine rotating the mold and plate assembly around at least one axis of rotation as the mold is indexed or rotated through each of the plurality of fabrication steps.

    Method for Processing PVC Ball
    6.
    发明公开

    公开(公告)号:US20230311370A1

    公开(公告)日:2023-10-05

    申请号:US18125804

    申请日:2023-03-24

    发明人: Shaofeng Shi

    摘要: The present disclosure provides a method for processing a PVC ball, including: Step A: carrying out a first ball shaping of a PVC paste located inside a first mold using a roto-cast machine or a rotational molding machine, to produce a hollow PVC ball; Step B: charging a gas to an interior of the shaped ball, so that the ball has an external diameter equal to a diameter of an inner cavity of a second mold; and Step C: placing the gas-charged ball into the second mold, then carrying out a second texture shaping of the shaped gas-charged ball located inside the second mold using the roto-cast machine or the rotational molding machine, to produce a texture on a surface of the shaped PVC ball. This method can produce a PVC ball having a predetermined texture and a predetermined pattern.

    METHOD FOR THE PRODUCTION OF A REINFORCED THERMOPLASTIC CONTAINER

    公开(公告)号:US20220314501A1

    公开(公告)日:2022-10-06

    申请号:US17709959

    申请日:2022-03-31

    发明人: Erich Freytag

    IPC分类号: B29C41/20 B60K15/03 B29C41/04

    摘要: An internally reinforced thermoplastic container has a body manufactured using rotational molding. Prior to molding, attachment elements are releasably attached to the interior surface of parts of a mold, and an initially separate tension member is connected between the attachment elements. The mold is closed and a body of the container molded such that the attachment elements are integrated into the walls of the body. After molding, the attachment elements are released from the mold. The attachment elements and the tension member define a tension structure to resist outward bulging of the container walls. The tension member may be tensioned prior to or after molding of the container body. The attachment elements may take the form of eyelets having a base incorporated into the wall of the container body. The method enables the formation of a hollow thermoplastic container with integrally formed internal reinforcement.