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US 6,638,455 B1Granted
Internal cooling with liquid gas
AssigneeFoboha GmbH
InventorsWerner Bodmer, Rainer Armbruster, Udo Bodmer
Life of this patent
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AssigneeFoboha GmbH
InventorsWerner Bodmer, Rainer Armbruster, Udo Bodmer
Estimating the term…
In a method for the internal cooling of a rotating object (4), liquid gas from at least one inlet channel (61) in a fixed object (5) is pressed into a ring-shaped groove (62) located between the fixed object (5) and the rotating object (4). From the ring-shaped groove (62) the liquid gas is pressed into at least one channel (63, 64.1, 64.2) in the rotating object (4) and brought to a part to be cooled (15). The liquid gas, upon contact with the part, evaporates and expands while absorbing heat, thereby cooling the part. The area surrounding the part to be cooled (15) may be designed as an expansion chamber (65). The method can be used to cool molded parts in injection molding machines with rotating molds (1), thereby achieving shorter cycle times.
A method for internal cooling of a rotating object (4) with liquid gas, said rotating object rotating around a rotation axis (a), said gas being introduced into said rotating object (4) from a fixed object (5), wherein said liquid gas is pressed from at least one inlet channel (61) in said fixed object (5) into a ringshaped groove (62) located on a contact surface (45) between said fixed object (5) and said rotating object (4), pressed from said ring-shaped groove (62) into at least one channel (63, 64.1, 64.2) in said rotating object (4) and delivered to at least one part (15) of said rotating object, said gas, upon reaching said at least one part, evaporating while absorbing vaporization heat and thereby cooling said at least one part, and is removed in the form of gaseous gas.
A device for internal cooling of a rotating object (4) with liquid gas, said rotating object rotating around a rotational axis (a), said gas being introduced to said rotating object from a fixed object (5), said fixed object (5) having at least one contact surface (45) with said rotating object (4), wherein said fixed object (5) has at least one inlet channel (61) for liquid gas, wherein, at said contact surface (45) between said fixed object (5) and said rotating object (4), there is a ring-shaped groove (62) into which said at least one inlet channel (61) merges and the center of which is on the axis of rotation (a) of said rotating object (4), and wherein said rotating object (4) has at least one channel (63, 64.1, 64.2) for liquid gas, which leads from said ring-shaped groove (62) into an area (65) surrounding a part (15) of said rotating object.
Dependencies are inferred from the claim text.