A closing device for a mold group with two half-molds extends along a main axis and has a device body mountable to one of the two half-molds, and a closing group having a closing element rotatable about a rotation axis between a closing position, in which the two half-molds are lockable and an opening position, in which the two half-molds are releasable. A movement group housed in the device body and engaged with the closing group to rotationally move the closing element has a stem movable along the main axis and transmission members for transforming linear motion of the stem into rotatory motion of the closing element. A command group has a command plate engaged with one command end of the stem and a metal sealing bellows engaged with the command plate. A position of the metal sealing bellows corresponds to an axial position of the command plate and of the stem.

A closing device for a mold group with two half-molds extends along a main axis and has a device body mountable to one of the two half-molds, and a closing group having a closing element rotatable about a rotation axis between a closing position, in which the two half-molds are lockable and an opening position, in which the two half-molds are releasable. A movement group housed in the device body and engaged with the closing group to rotationally move the closing element has a stem movable along the main axis and transmission members for transforming linear motion of the stem into rotatory motion of the closing element. A command group has a command plate engaged with one command end of the stem and a metal sealing bellows engaged with the command plate. A position of the metal sealing bellows corresponds to an axial position of the command plate and of the stem.

A rotomoulded product and a method of making a rotomoulded product via rotational moulding, the rotomoulded product including at least two layers of material that form a wall of the product, at least one of the layers including post-consumer recyclate (PCR), and at least one of the layers including virgin PE.

A rotomoulded product and a method of making a rotomoulded product via rotational moulding, the rotomoulded product including at least two layers of material that form a wall of the product, at least one of the layers including post-consumer recyclate (PCR), and at least one of the layers including virgin PE.

Rotational moulding machine (1) comprising a fixed frame (2), a support arm (3) comprising a first (4) and a second portion (5) rigidly joined together, the support arm (3) being rotationally fixed to the fixed frame (2) only at the first portion (4) to rotate about a first axis of rotation (101) substantially horizontal, a movable frame (6) rotationally fixed to the support arm (3) to rotate about a second axis of rotation (102) substantially perpendicular to the first axis of rotation (101), the movable frame (6) comprising a supporting portion (7) lying in a plane substantially perpendicular to the second axis of rotation (102), and an actuation system (8) rigidly fixed to the movable frame (6) at the supporting portion (7) and structured to secure a mould (20) and rotate the mould (20) about a third axis of rotation (103) substantially perpendicular to the second axis of rotation (102).

Rotational moulding machine (1) comprising a fixed frame (2), a support arm (3) comprising a first (4) and a second portion (5) rigidly joined together, the support arm (3) being rotationally fixed to the fixed frame (2) only at the first portion (4) to rotate about a first axis of rotation (101) substantially horizontal, a movable frame (6) rotationally fixed to the support arm (3) to rotate about a second axis of rotation (102) substantially perpendicular to the first axis of rotation (101), the movable frame (6) comprising a supporting portion (7) lying in a plane substantially perpendicular to the second axis of rotation (102), and an actuation system (8) rigidly fixed to the movable frame (6) at the supporting portion (7) and structured to secure a mould (20) and rotate the mould (20) about a third axis of rotation (103) substantially perpendicular to the second axis of rotation (102).

The present invention discloses a method of manufacturing integrated modular structure using a rotomolding process. The method comprises preparing at least a pair of molds embedded with at least one electric harness, wherein the pair of molds having a base mold and a first mold joined to form an enclosure, filling a first material in the base mold of the pair of molds, providing a heating and cooling cycle, wherein during heating at least the pair of molds being rotated for evenly spreading the molten first material and embedding the electric harness in the molten first material, obtaining a first molded part yielded by at least the pair of molds, and obtaining a second molded part yielded by at least a pair of molds, thereby the first molded part, the second molded part and the at least one embedded electric harness together forming the integrated modular structure.

The present invention discloses a method of manufacturing integrated modular structure using a rotomolding process. The method comprises preparing at least a pair of molds embedded with at least one electric harness, wherein the pair of molds having a base mold and a first mold joined to form an enclosure, filling a first material in the base mold of the pair of molds, providing a heating and cooling cycle, wherein during heating at least the pair of molds being rotated for evenly spreading the molten first material and embedding the electric harness in the molten first material, obtaining a first molded part yielded by at least the pair of molds, and obtaining a second molded part yielded by at least a pair of molds, thereby the first molded part, the second molded part and the at least one embedded electric harness together forming the integrated modular structure.

A cushion for a hot tub or spa is molded in a rotational molding process. The cushion includes a decorative outer surface made from a plastic material (e.g., an outer wall and side walls, etc.). The cushion includes a a back surface for interfacing with a hot-tub shell or spa shell with at least one projection extending from the back surface towards the decorative surface. The at least one projection is for supporting the force of an object that is resting on the cushion. The cushion if formed in a rotational molding process.

A cushion for a hot tub or spa is molded in a rotational molding process. The cushion includes a decorative outer surface made from a plastic material (e.g., an outer wall and side walls, etc.). The cushion includes a a back surface for interfacing with a hot-tub shell or spa shell with at least one projection extending from the back surface towards the decorative surface. The at least one projection is for supporting the force of an object that is resting on the cushion. The cushion if formed in a rotational molding process.