Abstract: A pressing arrangement for treatment of articles by hot pressing includes a pressure vessel including a furnace chamber and a furnace to hold the articles. A fan circulates a pressure medium within the furnace chamber, and enhances an inner convection loop at a load compartment. The inner convection loop pressure medium has an upward flow through the load compartment, and a downward flow along a peripheral portion of the furnace chamber. A flow generator generates a flow of pressure medium into the load compartment downstream the fan to enhance the inner convection loop. The flow is generated by transporting the pressure medium upwards from a space below a bottom insulating portion and above a bottom end portion, and by injecting the pressure medium into the load compartment downstream the fan to enhance the inner convection loop.

Abstract: The present invention relates to a pressing arrangement for treatment of articles by hot pressing and in particular to a pressing arrangement for hot isostatic pressing of containers holding substances. The method comprises: placing containers including the substance in a load compartment in the furnace and loading a pressure medium into the pressure vessel and substantially all pressure medium flowing out from the furnace chamber (18) passes at least one substance capturing module, which may include the walls of the guiding passage, at least one condensation element (35) in the guiding passage, filters (41, 43) arranged in the guiding passage, before making contact with the pressure vessel including the top and bottom closures (8, 9).

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and in particular by hot isostatic pressing. The pressing arrangement includes a pressure vessel and a furnace chamber adapted to hold articles, which furnace chamber is provided inside the pressure vessel. At least one guiding passage communicating with the furnace chamber forms an outer cooling loop, wherein the pressure medium in a part of the outer cooling loop is guided in proximity to pressure vessel walls and the top end closure before it re-enters into the furnace chamber. Further, a guiding channel element is located in the at least one guiding passage forming the outer cooling loop is arranged with at least one pressure medium channel for guiding the pressure medium from a central opening of the heat insulated casing radially and circumferentially towards a lateral wall of the pressure cylinder.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and preferably by hot isostatic pressing. In particular, the present invention relates to such an arrangement capable of obtaining a rapid rate without the need of special purpose valves for the cooling. A furnace chamber is provided inside the pressure vessel of the arrangement and a heat insulated casing arranged to surround the furnace chamber. A bottom insulating portion is arranged beneath the furnace chamber. Further, a fan having a controllable number of revolutions for circulating the pressure medium within the furnace chamber is arranged in the pressure vessel, and preferable within the furnace chamber. At least one feeding passage is arranged to allow feeding of pressure medium from a region being colder than a region within the furnace chamber towards an inlet of the fan, wherein an amount of pressure medium being fed to the inlet of the fan can be controlled by adjusting operational parameters of the fan.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing. The pressing arrangement for treatment of articles by hot pressing comprises a pressure vessel including: a furnace chamber comprising a heat insulated casing and a furnace adapted to hold the articles. A heat exchanger unit is arranged below said furnace chamber and adapted to exchange thermal energy with pressure medium when the pressure medium is passing through said heat exchanger unit. According to the present invention, at least one first and second inlet or aperture, respectively, for passage of alternating warm and cold pressure medium are arranged in the heat insulated casing in proximity to the heat exchanger unit (i.e. at approximately same the height as, above or below the heat exchanger unit). The at least one second inlet (or lower inlet) is below the at least one first inlet (or upper inlet) but at same height as or below the heat exchanger unit.

Abstract: A pressing arrangement for treatment of articles by hot pressing includes a pressure vessel including a furnace chamber and a furnace to hold the articles. A fan circulates a pressure medium within the furnace chamber, and enhances an inner convection loop at a load compartment. The inner convection loop pressure medium has an upward flow through the load compartment, and a downward flow along a peripheral portion of the furnace chamber. A flow generator generates a flow of pressure medium into the load compartment downstream the fan to enhance the inner convection loop. The flow is generated by transporting the pressure medium upwards from a space below a bottom insulating portion and above a bottom end portion, and by injecting the pressure medium into the load compartment downstream the fan to enhance the inner convection loop.

Abstract: A pressing arrangement for treatment of articles by hot pressing includes a pressure vessel including a furnace chamber and a furnace to hold the articles. A fan circulates a pressure medium within the furnace chamber, and enhances an inner convection loop at a load compartment. The inner convection loop pressure medium has an upward flow through the load compartment, and a downward flow along a peripheral portion of the furnace chamber. A flow generator generates a flow of pressure medium into the load compartment downstream the fan to enhance the inner convection loop. The flow is generated by transporting the pressure medium upwards from a space below a bottom insulating portion and above a bottom end portion, and by injecting the pressure medium into the load compartment downstream the fan to enhance the inner convection loop.

Abstract: In an aspect of at least one embodiment of the invention, there is provided a hot isostatic pressing arrangement for treatment of articles by hot isostatic pressing. The arrangement includes a pressure vessel including a furnace chamber including a heat insulated casing and a furnace for heating of a pressure medium during pressing, and a ‘heat exchanger unit’ or heat absorbing material located below the furnace chamber. In another aspect of at least one embodiment of the invention, there is provided a method for treatment of articles in a hot isostatic press. The press further includes a pressure vessel enclosing a furnace chamber and a ‘heat exchanger unit’. The method includes the steps of loading the articles into the furnace chamber, performing pressurized and heated treatment of the articles, cooling the articles and unloading of the articles. All the steps are performed while the ‘heat exchanger unit’ remains located inside the pressure vessel.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and, in particular, by hot isostatic pressing. In particular, the present invention relates to a pressing arrangement for treatment of articles by hot pressing, and preferably hot isostatic pressing, capable of providing a controlled, rapid cooling rate. The pressing arrangement comprises a pressure vessel including a furnace chamber comprising a heat insulated casing and a furnace adapted to hold the articles. At least one cooling circuit is arranged on an outside of the pressure vessel, the cooling circuit comprising a coolant and being arranged to enable the coolant to flow along a central portion of an outer wall of the pressure vessel. The pressure vessel is arranged with a non-uniform wall thickness, where the vessel wall is thickest at upper and lower end portions of the pressure vessel.

Abstract: The present invention relates to a pressing arrangement for treatment of articles by hot pressing and in particular to a pressing arrangement for hot isostatic pressing of containers holding substances. The method comprises: placing containers including the substance in a load compartment in the furnace and loading a pressure medium into the pressure vessel and substantially all pressure medium flowing out from the furnace chamber (18) passes at least one substance capturing module, which may include the walls of the guiding passage, at least one condensation element (35) in the guiding passage, filters (41, 43) arranged in the guiding passage, before making contact with the pressure vessel including the top and bottom closures (8, 9).

Abstract: A pressing arrangement for treatment of articles by hot pressing includes a pressure vessel including a furnace chamber and a furnace to hold the articles. A fan circulates a pressure medium within the furnace chamber, and enhances an inner convection loop at a load compartment. The inner convection loop pressure medium has an upward flow through the load compartment, and a downward flow along a peripheral portion of the furnace chamber. A flow generator generates a flow of pressure medium into the load compartment downstream the fan to enhance the inner convection loop. The flow is generated by transporting the pressure medium upwards from a space below a bottom insulating portion and above a bottom end portion, and by injecting the pressure medium into the load compartment downstream the fan to enhance the inner convection loop.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and in particular by hot isostatic pressing. The pressing arrangement includes a pressure vessel and a furnace chamber adapted to hold articles, which furnace chamber is provided inside the pressure vessel. At least one guiding passage communicating with the furnace chamber forms an outer cooling loop, wherein the pressure medium in a part of the outer cooling loop is guided in proximity to pressure vessel walls and the top end closure before it re-enters into the furnace chamber. Further, a guiding channel element is located in the at least one guiding passage forming the outer cooling loop is arranged with at least one pressure medium channel for guiding the pressure medium from a central opening of the heat insulated casing radially and circumferentially towards a lateral wall of the pressure cylinder.

Abstract: The present invention relates to a pressure vessel and a pressing arrangement comprising such a pressure vessel, for use at high-pressure pressing. The pressure vessel comprises a pressure chamber arranged for accommodating a pressure medium is provided. The pressure vessel comprises one or several cylinder segment/segments arranged to form a pressure vessel cylinder surrounding the pressure chamber, whereby a joint is formed at adjacent longitudinal edges of the cylinder segment/segments. Prestressing means are provided around an outer envelope surface of the pressure vessel cylinder for radially prestressing the pressure vessel cylinder. Each joint at adjacent edges of the cylinder segment or segments has a continuous extension along the longitudinal length of the pressure vessel cylinder.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and, in particular, by hot isostatic pressing. In particular, the present invention relates to a pressing arrangement for treatment of articles by hot pressing, and preferably hot isostatic pressing, capable of providing a controlled, rapid cooling rate. The pressing arrangement comprises a pressure vessel including a furnace chamber comprising a heat insulated casing and a furnace adapted to hold the articles. At least one cooling circuit is arranged on an outside of the pressure vessel, the cooling circuit comprising a coolant and being arranged to enable the coolant to flow along a central portion of an outer wall of the pressure vessel. The pressure vessel is arranged with a non-uniform wall thickness, where the vessel wall is thickest at upper and lower end portions of the pressure vessel.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing and preferably by hot isostatic pressing. In particular, the present invention relates to such an arrangement capable of obtaining a rapid rate without the need of special purpose valves for the cooling. A furnace chamber is provided inside the pressure vessel of the arrangement and a heat insulated casing arranged to surround the furnace chamber. A bottom insulating portion is arranged beneath the furnace chamber. Further, a fan having a controllable number of revolutions for circulating the pressure medium within the furnace chamber is arranged in the pressure vessel, and preferable within the furnace chamber. At least one feeding passage is arranged to allow feeding of pressure medium from a region being colder than a region within the furnace chamber towards an inlet of the fan, wherein an amount of pressure medium being fed to the inlet of the fan can be controlled by adjusting operational parameters of the fan.

Abstract: A pressure vessel comprising a pressure chamber (5) arranged for accommodating a pressure medium, comprising at least one cylinder segment (2) arranged for longitudinal connection to form a cylinder body (1), whereby a joint (7) arranged for an interconnection is formed at adjacent longitudinal edges (6) of the at least one cylinder segment. The pressure vessel further comprises pre-stressing means (20) provided around an outer envelope surface (4) of the cylinder body for radially pre-stressing the cylinder body and for at least partly decreasing a gap (11) extending along at least a portion of each joint between adjacent longitudinal edges of the at least one cylinder segment.

Abstract: A pressure vessel comprising a pressure chamber (5) arranged for accommodating a pressure medium, comprising at least one cylinder segment (2) arranged for longitudinal connection to form a cylinder body (1), whereby a joint (7) is formed at adjacent edges (6) of the at least one cylinder segment for sealing the adjacent edges, and first pre-stressing means (20) arranged for exerting radial compressive forces on the at least one cylinder segment for attaining tangential compressive stress (16) at the joint(s).

Abstract: A pressure vessel for isostatic pressing and a press comprising such a pressure vessel, wherein the pressure vessel comprises at least two sub-cylinders which are axially connected to form a force absorbing pressure vessel cylinder for enclosing a pressure medium during said isostatic pressing, wherein the axially connected sub-cylinders are welded along the joint(s) of the connected sub-cylinders. The pressure vessel comprises axially pre-stressing means arranged for exerting axial compressive forces on the sub-cylinders for attaining axial compressive stress at said joint(s) when the pressure medium is pressurized, and radially pre-stressing means arranged for exerting radial compressive forces on the sub-cylinders for attaining tangential compressive stress at the joint(s) when the pressure medium is pressurized.

Abstract: The present invention relates to an arrangement for treatment of articles by hot pressing. The pressing arrangement for treatment of articles by hot pressing comprises a pressure vessel including: a furnace chamber comprising a heat insulated casing and a furnace adapted to hold the articles. A heat exchanger unit is arranged below said furnace chamber and adapted to exchange thermal energy with pressure medium when the pressure medium is passing through said heat exchanger unit. According to the present invention, at least one first and second inlet or aperture, respectively, for passage of alternating warm and cold pressure medium are arranged in the heat insulated casing in proximity to the heat exchanger unit (i.e. at approximately same the height as, above or below the heat exchanger unit). The at least one second inlet (or lower inlet) is below the at least one first inlet (or upper inlet) but at same height as or below the heat exchanger unit.

Abstract: In an aspect of at least one embodiment of the invention, there is provided a hot isostatic pressing arrangement for treatment of articles by hot isostatic pressing. The arrangement includes a pressure vessel including a furnace chamber including a heat insulated casing and a furnace for heating of a pressure medium during pressing, and a ‘heat exchanger unit’ or heat absorbing material located below the furnace chamber. In another aspect of at least one embodiment of the invention, there is provided a method for treatment of articles in a hot isostatic press. The press further includes a pressure vessel enclosing a furnace chamber and a ‘heat exchanger unit’. The method includes the steps of loading the articles into the furnace chamber, performing pressurized and heated treatment of the articles, cooling the articles and unloading of the articles. All the steps are performed while the ‘heat exchanger unit’ remains located inside the pressure vessel.