Abstract: A system for ashing carbon includes a vertically oriented burner column having a first end and an opposing end with an interior chamber therebetween. The burner column has an aperture at the first end and a suction port proximal to the second end, the aperture and the suction port in communication with the interior chamber. The system also comprises a porous media screen located in the interior chamber and positioned between the first end and the second end of the burner column. The media screen is adapted to hold ignited carbon containing a precious metal therein. The system also contains a pump that is coupled to the suction port. The pump is configured to apply a negative pressure to the interior chamber of the burner column to draw air into the interior chamber via the aperture. The drawn air passes through the ignited carbon at a desired flow rate to achieve a temperature of the carbon suitable for ashing the carbon.

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 invention relates to an oven for heat treatment of a multiplicity of objects. The oven comprises a support stand, which is realized as a three-dimensional frame, an elongate heating chamber, which is arranged vertically or horizontally in a central region of the support stand, and a plurality of elongate combustion chambers, which are arranged vertically or horizontally inside the support stand. The oven additionally comprises a heating element, which is assigned to the heating chamber, and at least one fan for generating an air stream from the heating chamber to the combustion chambers. The combustion chambers are provided to receive the objects to be treated. The support stand is provided to support the heating chamber and the combustion chambers. The invention additionally relates to an oven installation having a multiplicity of such ovens.

Abstract: The invention relates to an oven for heat treatment of a multiplicity of objects. The oven comprises a support stand, which is realized as a three-dimensional frame, an elongate heating chamber, which is arranged vertically or horizontally in a central region of the support stand, and a plurality of elongate combustion chambers, which are arranged vertically or horizontally inside the support stand. The oven additionally comprises a heating element, which is assigned to the heating chamber, and at least one fan for generating an air stream from the heating chamber to the combustion chambers. The combustion chambers are provided to receive the objects to be treated. The support stand is provided to support the heating chamber and the combustion chambers. The invention additionally relates to an oven installation having a multiplicity of such ovens.

Abstract: A convection oven with laminar airflow and/or moisture injection. A radial airflow fan is used to provide a circulating airflow that is substantially even and substantially turbulence free. The circulating airflow is provided to an oven chamber via a plurality of egress ports that rim a divider wall disposed between the oven chamber and a fan chamber. The airflow interleaves with a plurality of pans in the oven chamber to provide a laminar airflow. Moisture is injected into the circulating airflow either upstream of the fan or by flashing water onto the hot blades of the fan from either the low pressure side or the high pressure side of the fan.

Abstract: A convection oven with laminar airflow and/or moisture injection. A radial airflow fan is used to provide a circulating airflow that is substantially even and substantially turbulence free. The circulating airflow is provided to an oven chamber via a plurality of egress ports that rim a divider wall disposed between the oven chamber and a fan chamber. The airflow interleaves with a plurality of pans in the oven chamber to provide a laminar airflow. Moisture is injected into the circulating airflow either upstream of the fan or by flashing water onto the hot blades of the fan from either the low pressure side or the high pressure side of the fan.

Abstract: The process for manufacturing an electronic circuit includes disposing an electronic device on a circuit substrate and hot melting a solder formed on the electronic device or the circuit substrate to bond the electronic device and the circuit substrate. The process includes the steps of feeding a liquid onto lands on the circuit substrate, aligning and mounting the electronic device on the lands, placing the circuit substrate in a treating vessel and heating the circuit substrate. The heating step includes controlling a pressure of an atmosphere in the treating vessel, hot-melting the solder to prevent at least a portion of the liquid from evaporating until the electronic device and the circuit substrate are bonded and to permit the liquid to evaporate after the electronic device and the circuit substrate are bonded.

Abstract: The present invention relates to a heat treatment machine for laboratory use which has a cooling chamber incorporated with a heating chamber of a furnace, both chambers are formed with a vacuum tube of simple construction, in which heating and cooling of a test piece are performed in vacuum atmosphere. The cooling process can be effected following the heating process with maintaining the same vacuum atmosphere, whereby a rapid cooling of the test piece is allowed and physical characteristics of the treated metal can be improved.

Abstract: The disclosure relates to a system for removing binder from "green" bodies wherein debinding action takes place substantially uniformly throughout the sytem for large load as well as for small loads. This result is obtained by providing a plurality of shelves for holding the parts and providing turbulent atmosphere flow across all shelves with recirculation taking palce over a water fall in the system to provide both a water saturated atmosphere and removal of binder from the atmosphere and system simultaneously.

Abstract: The disclosure relates to a vacuum sintering furnace having a lubricant eliminating section, sintering section and cooling section which are aligned in series and connected by connecting hood means to each other so that a workpiece may be directly transferred to the following section without exposure of the workpiece to outside air. The connecting hood means comprises doors for selectively opening and closing the boundaries between the neighboring sections. Furthermore, the lubricant eliminating section is provided with a lubricant trapping device mounted on an exhaust line connecting a furnace body and a vacuum pump to each other, thereby the stable operation of the vacuum pump is ensured.

Abstract: The axial fluid flow fan comprises a shaft, an impeller mounted on said shaft comprising a tankhead and a plurality of blades, a drive means attached to the shaft for rotating the impeller and a deflector having a bugle bell shape defined by a small diameter, a large diameter and a radius of curvature joining the diameters. The deflector is positioned downstream of the fan and slightly spaced from the impeller to separate the fluid coming off the impeller into at least two annular flow areas. The fan is part of a plug unit for a heat treating furnace in which the deflector is positioned about a frustoconical shaped shield which protects the shaft. The flow area downstream of the impeller is divided into equal areas. An extension plate in the furnace cooperates with the deflector to maintain the split areas of flow.

Abstract: An industrial furnace, particularly a single-chamber vacuum furnace, for heat treatment of metallic workpieces, with a heating chamber which is formed in a housing, which heating chamber is heatable via heating elements and is provided on the bottom and on the ceiling with a closable chamber opening for the passage of a quenching gas which can be circulated by means of a blower. A flap is swingably mounted at the chamber opening underneath a closing slide, which chamber opening is provided for the entrance of the gas. The flap controls the incoming flow of gas within the range of the free cross-section of the chamber opening.

Abstract: A method and apparatus for recirculation of atmosphere in a vacuum furnace which comprises a recirculation loop in which there is a low pressure line from the furnace chamber leading to a recirculation pump which pumps the recycled gas at a higher pressure to a high pressure line back into the furnace chamber. A means to analyze the furnace atmosphere is in communication with the high pressure line and signals its measurements of the atmosphere analysis to a valve on an enriching line. The enriching line passes enriched gas into either the high pressure line or the furnace chamber as the valve opens or closes. A means is provided to withdraw the gas from the furnace chamber in order to maintain the desired furnace chamber pressure as enriching gas is added.

Abstract: An improved atmosphere circulation system involving the use of aspirators for inducing turbulence of pressurized atmosphere within a vessel promotes temperature uniformity within the vessel and, for a given degree of temperature uniformity, reduces energy consumption.

Abstract: A method of spray-drying liquid and pastelike materials which comprises atomization of liquid and pastelike materials and subjection thereof to shock wave action, atomization of the material being effected at the point of the maximum shock wave energy characteristic, i.e. amplitude and frequency. The installation for carrying said method into effect comprises a combustion chamber. According to the invention, a device for spraying the material to be dried is installed in the combustion chamber, the latter being connected with a resonance exhaust tube and separated therefrom by a screen made up of perforated elements.

Abstract: An industrial oven having a housing defining a work chamber into which products to be treated by the oven may be placed includes a duct system communicating with a blower wheel mounted in the work chamber for communicating air blown by the wheel to the work chamber. The industrial oven further includes the improvement of a blower scroll consisting of a plurality of plates mounted about the blower wheel in an involute configuration. The blower plates define a plurality of outlets for uniformly directing air from the wheel to the duct system.