In a method for manufacturing a resin container, in the adjusting the temperature of the preform, the preform is accommodated in a cavity mold, a refrigerant introduction member is inserted into the preform, the refrigerant introduction member including a first flow path and a second flow path which are different in introduction or discharge position of a refrigerant, the preform is cooled by bringing the preform into close contact with an inner wall of the cavity mold at a pressure of the refrigerant introduced from the refrigerant introduction member. When the preform is cooled, cooling is performed by switching between a first cooling blow for introducing the refrigerant from the first flow path and discharging the refrigerant from the second flow path and a second cooling blow for introducing the refrigerant from the second flow path and discharging the refrigerant from the first flow path.

The present application includes an injection molding step and a stretch blow molding step. The stretch blow molding step is configured to include: a first step in which preliminary blow air is introduced into a preform to stretch the preform in a state in which a stretching rod does not contact the bottom of the preform; a second step which is executed after the first step, and in which the preliminary blow air is introduced into the preform and the stretching rod is moved at a set speed and pressed against the bottom of the preform to stretch the preform; and a third step which is executed after the second step, and in which final blow air is introduced into the preform to stretch the preform.

Transfer star-wheel (1) for containers (100) of thermoplastic material, comprising: a rotary carousel (2) bearing a plurality of supporting stations (S) for supporting containers (100) by their neck (100b), in each supporting station (S) being provided a pliers (3) hinged to the rotary carousel (2) at a hinge axis (AA) in such a way that it assumes at least a first configuration in which the pliers (3) is fixed, that means it cannot rotate about its hinge axis (AA), and a second configuration in which the pliers (3) can oscillate about its hinge axis (AA); a cam kinematic motion that is operatively active on each pliers (3) for maintaining it in the first configuration,
characterized in that it comprises a reactivating device (8) for each pliers (3), that comprises elastic means (9, 10) operatively active on the pliers (3) to bring it from the second to the first configuration following an accidental event that deactivated the pliers.

A preform 20 comprises a neck portion 22 having an opening 21, a cylindrical barrel portion 23, and a bottom portion 24 larger in diameter than the barrel portion 23, and has a corner portion 25 at a boundary between the barrel portion 23 and the bottom portion 24.

The invention relates to a gripper system (10) comprising a gripper module carrier (12) and a gripper module (14) for holding workpieces (22), in particular containers or container preforms, the gripper module (14) having a gripper base (16) and two gripper arms (18) with gripping elements (20) for at least partially gripping around a holding region (24) of containers or container preforms, the gripper arms being mounted on the gripper base (16) such that they can pivot relative to one another, the gripper module (14) being releasably connected to the gripper module carrier (12), wherein the gripper system (10) further comprises a locking device (26) for locking the gripper module (14) to the gripper module carrier (12), and wherein the locking device (26) is movable into a locking position for locking the gripper module (14) to the gripper module carrier (12).

The present invention relates to a heating system for preforms upstream of a blowing or stretch-blowing machine, in particular a heating system using monochromatic infrared radiation, preferably laser-generated. In particular, the invention relates to a heating system (301) for preforms (P), comprising a carousel for treating the preforms (P) comprising a plurality of heating elements (304) configured to be inserted either inside or outside each preform (P) and to radiate electromagnetic radiation in the infrared field which forms, in such a device, a disc of radiation according to a radial symmetry which departs from the center of the axis of the preform and which appropriately converges and diverges.

Fixation of a container shape of a hollow molded body is not completed during a blow molding process but is completed during an ejection process of an ejection section, thereby shortening an operation time in a stretch blow molding section, and improving the production efficiency of hollow molded bodies by shortening the time required for the blow molding process during a molding cycle. Cooling air is blown into the inside of the hollow molded body disposed in the ejection section in the ejection process C during the blow molding process B in the next molding cycle to cool the hollow molded body disposed in the ejection section to solidify the container shape.

The present invention relates to a heating system for preforms upstream of a blowing or stretch-blowing machine, in particular a heating system using monochromatic infrared radiation, preferably laser-generated.

In particular, the invention relates to a heating system (301) for preforms (P), comprising a carousel for treating the preforms (P) comprising a plurality of heating elements (304) configured to be inserted either inside or outside each preform (P) and to radiate electromagnetic radiation in the infrared field which forms, in such a device, a disc of radiation according to a radial symmetry which departs from the center of the axis of the preform and which appropriately converges and diverges.

Fixation of a container shape of a hollow molded body is not completed during a blow molding process but is completed during an ejection process of an ejection section, thereby shortening an operation time in a stretch blow molding section, and improving the production efficiency of hollow molded bodies by shortening the time required for the blow molding process during a molding cycle.

Cooling air is blown into the inside of the hollow molded body disposed in the ejection section in the ejection process C during the blow molding process B in the next molding cycle to cool the hollow molded body disposed in the ejection section to solidify the container shape.

A device (30) for serial treatment of hollow bodies including: a transport member (32); a treatment rod (38) mounted slidably relative to the transport member (32); controlled elements for moving each treatment rod (38) between a retracted position and an extended position in which the treatment rod (38) is intended for being inserted axially into the transported hollow body; wherein the controlled elements consist of an electric actuator (42) controlled by an electronic control unit (44) for stopping the treatment rod (38) in the extended position thereof. A method for serial treatment of preforms using the treatment device is also described.