The invention relates to a method for producing rotomolded products, and to an installation for carrying out such a method. The method is characterized by the simultaneous use of a plurality of spherical receptacle members, each without a dedicated rotary drive, each of which containing at least one molding die that is suppliable with raw material, and by the simultaneous use of a plurality of processing devices which are operated in a mutually independent manner, each for carrying out at least one of a plurality of production steps, using in each case one of the spherical receptacle members, wherein a plurality of processing devices which are configured as rotating stations are used in a temporally parallel or temporally overlapping manner, and/or wherein a plurality of processing devices which are configured as cooling stations are used in a temporally parallel or temporally overlapping manner, and/or wherein a plurality of processing devices which are configured as supply stations are used in a temporally parallel or temporally overlapping manner, and/or wherein a plurality of processing devices which are configured as retrieval stations are used in a temporally parallel or temporally overlapping manner, and wherein the spherical receptacle member conjointly with the content thereof and without the rotary drive is in each case retrieved from the processing device which has just terminated a processing step, said spherical receptacle member thereafter being fed to a processing device that is immediately vacant for the respective next processing step.

A stent for repairing post-anastomasis (e.g., bariatric) surgery leaks is formed by an elongated tube having a proximal flare-shaped flange, an enlarged middle section, and a distal flare-shaped flange, where an exterior surface of the elongated tube is substantially covered with a polymer.

A stent for repairing post-anastomasis (e.g., bariatric) surgery leaks is formed by an elongated tube having a proximal flare-shaped flange, an enlarged middle section, and a distal flare-shaped flange, where an exterior surface of the elongated tube is substantially covered with a polymer.

A mold device configured for use in a rotational molding device configured to perform a rotational molding process by rotating the mold device by means of a robot arm is provided. The mold device generally includes a connector part for connecting to the robot arm, first and second mold parts configured to assemble to each other for enclosing a mold cavity in an assembled state. The mold device includes a magnet gripper for releasably attaching the mold parts and heating and cooling elements integrated in at least one of the mold parts for respectively heating and cooling the mold part. The heating elements may be arranged in first grooves positioned in an exterior face of the respective mold part. The cooling elements may be arranged in second grooves positioned in the exterior face of the respective mold part in between the first grooves.

A mold device configured for use in a rotational molding device configured to perform a rotational molding process by rotating the mold device by means of a robot arm is provided. The mold device generally includes a connector part for connecting to the robot arm, first and second mold parts configured to assemble to each other for enclosing a mold cavity in an assembled state. The mold device includes a magnet gripper for releasably attaching the mold parts and heating and cooling elements integrated in at least one of the mold parts for respectively heating and cooling the mold part. The heating elements may be arranged in first grooves positioned in an exterior face of the respective mold part. The cooling elements may be arranged in second grooves positioned in the exterior face of the respective mold part in between the first grooves.

A method for the production of a molded part made of plastic by rotational molding includes providing an insert element made of at least one of an absorbent and saturable material in a rotational melt mold. The rotational melt mold has at least one of a constriction and a wall that projects, in an area of an inner radius, into an interior of the rotational melt mold. A plastic precursor of the plastic intended for the plastic molded part is provided in the rotational melt mold. The plastic precursor is present as a melt in the rotational melt mold. The rotational melt mold is rotated so that the melt polymerizes and is simultaneously shaped, so that part of the melt is picked up by the insert element, and so that a wall thickness of the molded part in a finished form is increased in an area where the insert element is arranged.

A method for the production of a molded part made of plastic by rotational molding includes providing an insert element made of at least one of an absorbent and saturable material in a rotational melt mold. The rotational melt mold has at least one of a constriction and a wall that projects, in an area of an inner radius, into an interior of the rotational melt mold. A plastic precursor of the plastic intended for the plastic molded part is provided in the rotational melt mold. The plastic precursor is present as a melt in the rotational melt mold. The rotational melt mold is rotated so that the melt polymerizes and is simultaneously shaped, so that part of the melt is picked up by the insert element, and so that a wall thickness of the molded part in a finished form is increased in an area where the insert element is arranged.

Polyolefin hollow articles prepared via a rotomolding process are provided flame retardancy by incorporating therein a phosphonate ester, an N-alkoxy hindered amine and melamine cyanurate.

Rotational moulding process for producing an article (300), the process comprising: providing a mould (100) comprising: a main body (99) which defines an inner cavity (30) having a conformation surface (31) counter-shaped to the article (300), and a venting device (1) fixed to the main body (99) and comprising: an inner chamber (2) in air communication with the inner cavity (30) through a first mouth (3) and with an outer environment (35) through at least one second mouth (4); a shutter (5) movable between an open position, in which let free the first mouth (3) for putting the inner cavity (30) in air communication with the outer environment (35), and a close position, in which closes the first mouth (3) for preventing the air communication; an actuator (6) for alternately moving the shutter (5) between the open position and the close position, the process further comprising: inserting a fluid form polymeric material into the inner cavity (30); closing the main body (99) and rotating the mould (100); while keeping the mould (100) in rotation and with the shutter (5) in the close position, heating the main body (99) until reaching a first temperature; while keeping the mould (100) in rotation, heating the main body (99) until reaching a second temperature higher than the first temperature; cooling the main body (99) and extracting the article (300), and wherein, during the heating of the main body (99) until the reaching of the first temperature, the process further comprises subtracting heat from the shutter (5) for maintaining the shutter (5) at a respective temperature lower than the first temperature.

Rotational moulding process for producing an article (300), the process comprising: providing a mould (100) comprising: a main body (99) which defines an inner cavity (30) having a conformation surface (31) counter-shaped to the article (300), and a venting device (1) fixed to the main body (99) and comprising: an inner chamber (2) in air communication with the inner cavity (30) through a first mouth (3) and with an outer environment (35) through at least one second mouth (4); a shutter (5) movable between an open position, in which let free the first mouth (3) for putting the inner cavity (30) in air communication with the outer environment (35), and a close position, in which closes the first mouth (3) for preventing the air communication; an actuator (6) for alternately moving the shutter (5) between the open position and the close position, the process further comprising: inserting a fluid form polymeric material into the inner cavity (30); closing the main body (99) and rotating the mould (100); while keeping the mould (100) in rotation and with the shutter (5) in the close position, heating the main body (99) until reaching a first temperature; while keeping the mould (100) in rotation, heating the main body (99) until reaching a second temperature higher than the first temperature; cooling the main body (99) and extracting the article (300), and wherein, during the heating of the main body (99) until the reaching of the first temperature, the process further comprises subtracting heat from the shutter (5) for maintaining the shutter (5) at a respective temperature lower than the first temperature.