One-piece mould bottom with optimised fluid circulation
AssigneeSidel Participations
InventorMaxime Sandrini
Life of this patent
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Abstract
The present invention relates to a mold bottom extending about a central axis and comprising a molding wall made as a single piece and defining a molding surface; a cavity formed inside the molding wall, and having a central area, a peripheral area, and a middle area; a central pipe supplying the cavity with heat-transfer fluid, that opens in the central area via one or more central openings; and at least one pipe for discharging the heat-transfer fluid from the cavity, into which the peripheral area opens. According to the invention, the mold bottom comprises a bypass that brings the central pipe into direct communication with the middle area of the cavity by bypassing the central area.
Claims20
A mold bottom (7) intended for a mold (1) for manufacturing containers by blow-molding or stretch-blow-molding from blanks (2) made of plastics material, this mold bottom (7) extending about a central axis (X) and comprising:
- a molding wall (8), which is formed as a single block and defines a molding surface (9);
- a cavity (10) formed on the inside of the molding wall (8), this cavity (10) having a central zone (11) situated in the vicinity of the central axis (X) of the mold bottom (7), a peripheral zone (12), situated at a distance from the central axis (X), and an intermediate median zone (13) between the central zone (11) and the peripheral zone (12);
- a central duct (18) for feeding heat transfer fluid to the cavity (10), which leads into the central zone (11) through one or more central opening(s) (20);
- at least one duct (19) for evacuating the heat transfer fluid from the cavity (10), into which the peripheral zone (12) leads;
- wherein the mold bottom (7) comprises a bypass (24), which places the central duct (18) in direct communication with the median zone (13) of the cavity (10), bypassing the central zone (11).
Dependencies are inferred from the claim text.