Mould support for overstroke base

A mould base support for shaping a bottom of a bottle made of thermoplastic material, which mould base support comprises a base interposed between a mould base and a sliding bolster which is guided on a frame, of a mould carrier unit, along an axis of displacement of said mould base:

• wherein said base is made in the form of a dual-acting cylinder actuator which is constituted by a cylinder containing a piston, which has a rod which supports said mould base and by a base plate, which closes off said cylinder;
• wherein said base plate is provided with a finger arranged in a center of said base plate, on said axis, in order to cooperate with a locking mechanism situated on said bolster, and said base plate comprises, around said finger, holes designed to allow a sealed passage of heat transfer and demoulding pipes which deliver a heat-transfer fluid and demoulding air to said mould base and zones for an attachment of feed pipes for chambers of said cylinder actuator, which heat transfer and demoulding pipes and feed pipes are all arranged parallel to said axis of displacement of said mould base;
• and
• wherein said bolster comprises arrangements, in the form of holes, or recesses, for allowing a passage of said heat transfer and demoulding pipes and said feed pipes,
• wherein said heat transfer and demoulding pipes comprise delivery pipes for delivery of said heat-transfer fluid and a delivery pipe for delivery of said demoulding air, which delivery pipes are attached directly to said piston of said cylinder actuator,
• and wherein said delivery pipes for delivery of said heat-transfer fluid and said delivery pipe for delivery of said demoulding air are arranged in a triangle around said locking finger passing through said base plate and said bolster.

A mould base support for shaping a bottom of a bottle made of thermoplastic material, which mould base support comprises a base interposed between a mould base and a sliding bolster which is guided on a frame, of a mould carrier unit, along an axis of displacement of said mould base;

• wherein said base is made in the form of a dual-acting cylinder actuator which is constituted by a cylinder containing a piston, which has a rod which supports said mould base and by a base plate, which closes off said cylinder;
• wherein said base plate is provided with a finger arranged in a center of said base plate, on said axis, in order to cooperate with a locking mechanism situated on said bolster, and said base plate comprises, around said finger, holes designed to allow a sealed passage of heat transfer and demoulding pipes which deliver a heat-transfer fluid and demoulding air to said mould base and zones for an attachment of feed pipes for chambers of said cylinder actuator, which heat transfer and demoulding pipes and feed pipes are all arranged parallel to said axis of displacement of said mould base;
• and
• wherein said bolster comprises arrangements, in the form of holes, or recesses, for allowing a passage of said heat transfer and demoulding pipes and said feed pipes,
• wherein said heat transfer and demoulding pipes and feed pipes have axes which are distributed around a same circumference which is centered on said axis of displacement of said mould base.

A mould base asembly for shaping a bottom of a bottle made of thermoplastic material using an overstroking process, comprising:

• a mould base;
• a bolster slidably movable on a frame along a displacement axis of the mould base;
• a separate base interposed between the mould base and the bolster, the base comprising a dual-acting cylinder actuator comprising a cylinder, a piston comprising a rod that supports the mould base, and a base plate closing off the cylinder;
• the base plate comprising a finger cooperating with a locking mechanism on the bolster that secures the finger, the base plate comprising around the finger openings configured to allow passage of heat transfer and demoulding pipes that deliver a heat-transfer fluid and demoulding air to the mould base and openings for attachment of feed pipes for chambers of the cylinder actuator;
• and
• the bolster comprising openings or recesses for passage of the heat transfer and demoulding pipes and the feed pipes.