Abstract: An induction burner element for a cooking appliance includes a plurality of injection molded frames positioned in a spaced and concentric relationship, each injection molded frame having an upper cavity an at least one lower cavity. A ferrous member is disposed within the at least one lower cavity for each injection molded frame. A plurality of wound coils are disposed within the upper cavity for each injection molded frame, wherein each wound coil corresponds to a respective injection molded frame.

Abstract: An electromagnetic induction heating apparatus for heating a fluid includes a tubular insulating member (10) through which the fluid flows, and the tubular insulating member (10) is surrounded by an outer shell member (2, 3) exclusively of its exit-side opening (10e) serving as an exit for the fluid. The outer shell member (2, 3) is provided, at a position nearer to the exit-side opening (10e) than to an inlet-side opening (10i) serving as an inlet for the fluid of the tubular insulating member (10), with an inflow port (3a) through which the fluid flows into the outer shell member (2, 3), an electromagnetic induction coil (25) is wound around an outer periphery of the tubular insulating member (10), and a heating magnetic body (20) is disposed inside the tubular insulating member (10) in a state of forming flow paths. The above arrangement provides a small-type electromagnetic induction heating apparatus with which fluid heating efficiency can be enhanced and a high-pressure fluid can also be heated.

Abstract: A reactor includes an outer peripheral iron core, and at least three core coils contacting or connected to an inner surface of the outer peripheral iron core. Each of the core coils includes a core and a coil wound onto the core. The reactor includes an attachment unit disposed on one end surface of the outer peripheral iron core, to attach the outer peripheral iron core in a predetermined position. At least one ventilation port is formed in an extension portion of the attachment unit.

Abstract: Induction Weldable Pipe Connectors (IWPCs) (400) for electromagnetic induction welding with at least one plastic pipe (30). IWPCs (400) include a tubular induction weldable mounting (401) having an opposite pair of induction weldable sockets (404A, 404B), a tubular cover (406) externally mounted on the induction weldable mounting (401), and a tubular pipe tang (407) internally disposed in one induction weldable socket (404A, 404B) for destining an induction weldable socket (404A, 404B) as an induction weldable pipe socket (408A, 408B) for forced sliding insertion of a pipe end (31) thereinto. The cover (406) includes an opposite pair of thermally insulated induction weldable socket mouth rims (426A, 426B) for entrapping melted solder lining (412) inside the induction weldable mounting (401) during an electromagnetic induction welding operation, thereby ensuring improved welding.

Abstract: According to the invention, for shrinking and expanding a tool in the bush part (3) of a tool holder, an induction coil unit (1), in which several polar parts (25) made of a soft magnetic material are radially adjusted in the yoke ring made of a soft magnetic material, is provided. Said polar parts have end faces (29) which are inclined in relation to the axis of rotation (7) of the bush part (3) and can be kept in a linear contact with a conical peripheral surface (31) of the bush part (3) which holds a the tool (11) in a press fit manner. In order to avoid possible local overheating of the bush part (3), the area (39) of the end face (29) parallel to the axis is connected on the output side of the tool to an area (33) of the end face (29) inclined in relation to the axis of rotation (7).

Abstract: The present invention concerns methods and apparatus for forming a clad product, such as a clad pipe or tube. Particular embodiments include a method for metallurgically bonding cladding material onto a metal substrate, the method including a step of providing a metal substrate comprising a pipe or a tube having a cladding composition arranged along an interior surface of the substrate to form a coated substrate, the interior surface arranged within an interior cavity of the substrate. A further step includes inserting a heat source into an interior cavity of the substrate, the heat source comprising an infrared, microwave, or radio frequency heat source, the heat source being mounted on a heat source-retaining housing, the housing comprising a cantilevered structure. An additional step includes applying heat discharged from the heat source to the coated substrate along the coated interior surface until the cladding composition metallurgically bonds to the substrate.

Abstract: An apparatus for magnetic induction hardening of a workpiece includes a magnetic tool having a body portion formed of a generally non-magnetic material. The body portion has a surface configured to be positioned in close proximity to the workpiece being hardened. The apparatus further includes a magnetic arrangement coupled to the body portion at or adjacent the surface of the body portion and configured to provide regions of alternating polarity. A workpiece holder is configured to support the workpiece in close proximity to the surface of the magnetic tool. A drive arrangement for rotating the magnetic tool relative to the workpiece holder about an axis of rotation is provided to induce heating of the workpiece to achieve a temperature in the austenitic range of the workpiece resulting in hardening of the workpiece through a microstructural transformation.

Abstract: A mold for coating a pipeline section with molten coating material from an injection molding machine, wherein the mold comprises a shell of impervious material reinforced by an exoskeleton of non-distensible material. An assembly for supporting a mold comprising a plurality of mutually separable shell bodies for coating a pipeline section, wherein the assembly comprises motorized opening and closing of the shell bodies in a straight line. An assembly for supporting a bent pipeline section wherein the assembly comprises a base and a pair of arms extending from the base, wherein each arm comprises a respective clamping collar for clamping a bent pipe section between the arms. A vehicle for induction heating a bent pipeline section, wherein the vehicle comprises: a helical induction coil; and wheels arranged to guide movement of both ends of the induction coil through a tubular inside face of a bent pipeline section.

Abstract: Systems, devices, and methods for heating an inside wall of a pipe or a vessel. In one example, a system is for heating an inside wall of a pipe, a vessel, or some combination thereof. The system includes a movable mechanical device configured to be positioned at least partially within the pipe, the vessel, or some combination thereof. The movable mechanical device is configured to be moved using control circuitry. The system also includes a heating device coupled to the movable mechanical device and configured to be positioned at least partially within the pipe, the vessel, or some combination thereof. The heating device is also configured to heat the inside wall of the pipe, the vessel, or some combination thereof.

Abstract: A method of sealing a peelable lid (2) to a flange (4) provided within a metal can body (1) which involves inserting an induction coil (6) into the can body to primarily heat the sealing surface (5) of the flange, whilst keeping the exterior wall of the can relatively cool to avoid tin reflow and decoration degradation of the exterior wall. The induction coil is subsequently removed from the can body and a peelable lid applied to the flange, whereby residual heat in the flange aids the sealing of the lid to the flange, e.g. by allowing activation of a bonding material.

Abstract: A method and apparatus for annealing cylindrical cases for ammunition cartridges or other tubular casings is provided. In one embodiment, a case annealing apparatus is provided. The case annealing apparatus includes a base, a feeding device having a first end tapering to a second end that is coupled to the base, a rotatable feed wheel assembly disposed adjacent a second end of the feeding device, a linear slide mechanism disposed adjacent the rotatable feed wheel assembly defining a portion of a case receiving region, and a heating device disposed adjacent the case receiving region, the heating device operable to heat a portion of a case retained in the case receiving region.

Abstract: Electromagnetic induction welding of plastic pipe distribution systems including inter alia induction weldable pipe connectors each having at least one induction weldable pipe socket. The induction weldable pipe sockets include a solid metal susceptor sleeve enveloping a plastic solder lining. Electromagnetic induction coil assemblies for clamping on induction weldable pipe sockets.

Abstract: An induction heating element includes a primary conductive portion and a secondary conductive portion. The primary conductive portion is connected to a power source, and conducts electric current from the power source to generate a magnetic field that inductively heats a portion of the workpiece. The secondary conductive portion is electrically insulated from the primary portion, and receives an induced electric current from the primary portion to affect the magnetic field generated by the primary portion.

Abstract: Apparatus and method for inductive heating of a material located in a channel, to modify the state of the material between flowable and nonflowable states. An internal inductive heating assembly is disposed in the material in the channel, and a signal is supplied to the assembly to generate a magnetic flux in at least one of the assembly and the material, the magnetic flux generating inductive heating of the assembly and/or the material. The signal is adjusted to produce a desired rate of temperature cycling of the material in the channel which includes modifying the state of the material between flowable and nonflowable states. In one embodiment, the heating assembly includes an interior coil, an exterior sheath inductively coupled to the coil, a dielectric material disposed between the coil and sheath, a flux concentrator, and a conductor for supplying a signal to the coil to generate the magnetic flux.

Abstract: A high frequency heat treatment method for a fine bottom-closed hole includes preparing a coil so as to be completely inserted into the fine bottom-closed hole, preparing a core for controlling a magnetic flux within the coil such that the core protrudes from upper and lower sides of the coil, heat-treating a target part of the fine bottom-closed hole under conditions of a heating time of 2˜3 seconds, an output power of 200˜300 kW, a quenching time of 3˜5 seconds, a positive electrode voltage of 4 ˜8 kV, and a positive electrode current of 2.0˜4.5 A, and quenching the heat-treated part of the fine bottom-closed hole with cooling nozzles fixed around the heat-treated part such that a sufficient amount of cooling water is injected uniformly over the whole heated part with a sufficient pressure via the cooling nozzles.

Abstract: Method for inductive heating of a material located in a channel, the material having a melting range between a solidus temperature and a liquidus temperature. The method includes providing an internal inductive heating assembly in the material in the channel, and supplying a signal to the assembly to generate a magnetic flux in at least one of the assembly and material. The magnetic flux generates inductive heating of the assembly and/or the material and a physical agitation which lowers the solidus temperature of the material to a reduced solidus temperature.

Abstract: The induction coil unit (1) for heating a sleeve section (3) of a tool holder (5) holding the shaft (13) of a rotation tool in a receiver opening (11) in press fit comprises two coil units (21, 23), whose distance can be changed selectively through at least one slanted surface cam assembly (43). A magnetic flux concentrator assembly (33) with several concentrator elements (55) distributed in circumferential direction is associated with the coil unit (21) adjacent to the free end (15) of the sleeve section (3). The width of a pass through opening (57) defined by the concentrator elements (55) for the tool shaft (13) is also changeable through a control cam (69), to which the concentrator elements (55) are coupled through a slanted surface cam assembly (73). The two slanted surface cam assemblies (43, 73) are coupled amongst each other in a useful manner in order to simplify the operation of the unit (1).

Abstract: Apparatus and method for inductive heating wherein an internal inductive heating assembly is provided within a bore of a solid article. The heating assembly includes an interior coil inductively coupled to a portion of the article adjacent the bore to inductively heat the article. The heating assembly lacks an internal cooling mechanism and the coil thermally coupled to the adjacent article portion for transmission of heat from the coil to the article. A signal is provided to the coil to generate a magnetic flux for inductive heating of the adjacent article portion.

Abstract: Apparatus and method for inductive heating of a material located in a channel, to modify the state of the material between flowable and nonflowable states. An internal inductive heating assembly is disposed in the material in the channel, and a signal is supplied to the assembly to generate a magnetic flux in at least one of the assembly and the material, the magnetic flux generating inductive heating of the assembly and/or the material. The signal is adjusted to produce a desired rate of temperature cycling of the material in the channel which includes modifying the state of the material between flowable and nonflowble states. In one embodiment, the heating assembly includes an interior coil, an exterior sheath inductively coupled to the coil, a dielectric material disposed between the coil and sheath, a flux concentrator, and a conductor for supplying a signal to the coil to generate the magnetic flux.

Abstract: Apparatus and method for inductive heating wherein an internal inductive heating assembly is provided within a bore of a solid article. The heating assembly includes an interior coil inductively coupled to a portion of the article adjacent the bore to inductively heat the article. The heating assembly lacks an internal cooling mechanism and the coil thermally coupled to the adjacent article portion for transmission of heat from the coil to the article.

Abstract: A process for producing a barrel for a twin-screw extruder with intermeshing screws from a steel block, wherein the barrel has a wear resistant inner surface, includes producing two partially intersecting bores passing completely through the steel block, the two intersecting bores forming a spectacle-shaped bore having narrowed regions where the two intersecting bores intersect, and hardening an inner surface of the spectacle-shaped bore with essentially constant depth of penetration by passing an inductor through the spectacle-shaped bore from one end to the other, the inductor is smaller than but having approximately the same shape as the inner contour of the spectacle-shaped bore and is configured such that less energy for heating the inner surface of the spectacle-shaped bore is delivered in the vicinity of the two narrowed regions of the spectacle-shaped bore by the longitudinal sections on the periphery of the inductor than in regions on the inner contour remote from the narrowed regions.

Abstract: A cylindrical member including a cylindrical substrate and at least one coating layer thereon is formed through an applying step of applying a coating liquid on the cylindrical substrate and a drying step of drying the coating liquid that has been applied in the applying step by induction heating device to form the coating layer. The induction heating device is disposed in the interior of the cylindrical substrate. The induction heating device has an excitation coil for generating a magnetic flux in a direction perpendicular to the axial direction of the cylindrical member. The excitation coil is disposed along the inner surface of the cylindrical substrate.

Abstract: An apparatus and method for a dry disconnect coupling. The dry disconnect coupling includes a first coupling member for coupling to a second coupling member. A circuit provides a first signal based on when the first coupling member is disconnected to the second coupling member. Thermally coupled to the first coupling member is a first heater. The first heater generates heat based on the first signal.

Abstract: A method and device for winding and baking compact coils of wire with at least one baked enamel layer on a heated winding mandrel. The method includes providing the winding mandrel at the beginning of winding with a temperature which is above the softening temperature of the baked lacquer. The device includes at least one electrical heating cartridge arranged in the interior of the winding mandrel.

Abstract: A surface current heating apparatus including a plurality of hollow heat generating members each of which is made of a ferromagnetic material and has a through-hole and which are spaced apart from each other so as to provide an array of the hollow heat generating members, and an electrically conductive wire electrically insulated and extending through the through-hole of each hollow heat generating member, and wherein an alternating current from a power source is applied to the electrically conductive wire, to cause a surface current to flow through a skin layer of each hollow heat generating member which is located near an inner surface of the through-hole, whereby heat is generated from the said skin layer of the heat generating member.

Abstract: The tool comprises one or more core-coil assemblies 2 jacketed in an non-magnetic and electrically insulating, tubular outer housing, 10. The housing enables high power transfer efficiency. A structural skeleton 20 extends longitudinally through the tool for axially reinforcement. The core-coil assemblies 2 are encapsulated in epoxy 77 to mechanically rigidify and protect them as well as to isolate the coil windings 51 from the power bus 23 extending longitudinally of the core-coil assemblies through a peripheral busway 60, 61.

Abstract: A high frequency heating coil device having sufficient flexibility and heating ability is provided. Coils 2 are contained in outer jacket 1. The coils 2 are made of steel, copper or brass tubing which is annealed sufficiently to be flexible. Plural pieces of magnetic substance 10 are arranged in series between the coils 2. Flexible spacer 9 is arranged between a magnetic substance 10 and the coils 2. Upper and lower end faces of each piece of the magnetic substance 10, make direct contact with other adjacent pieces, and are made with curved faces a. Heating coil device is so constructed that when inserted into a hole of an object to be heated and high frequency current is supplied to the coils to the coils 2 from electric source 6, eddy currents are generated in an inner surface of the hole in order to heat the object. The heating coil device, while being bent to avoid obstructions, can still be inserted into and drawn out of the hole.

Abstract: An induction heating device having a pair of inductors in a sub-assembly connected by fluid conduits to a cooling apparatus and by electrical conductors to an inverter and impedance adjusting circuit has a quick disconnect terminal assembly arranged closely adjacent to the inductors. This permits the inductor sub-assembly to be quickly and easily disconnected from the conduits and conductors so that the inductor sub-assembly may be moved to a new location easily and quickly. A plurality of inductor subassemblies may be used with a single terminal assembly to provide an accelerated method of heating a series of items by successively moving the terminal assembly to a next inductor sub-assembly to begin heating and to then move the non-disconnected inductor assembly to a new location while the next inductor sub-assembly is operating.

Abstract: A high frequency heating method of a bolt sets a maximum achievable temperature Tmax in an inner surface of the bolt with hole to a value which is not higher than a final heat treated temperature To. A maximum thermal stress .sigma.max occurring in the bolt with hole is set to a value which is not more than a yield stress .sigma.ys of the bolt material. From the maximum thermal stress .sigma.max, a temperature difference .DELTA.T is obtained between Tmax and a mean temperature Tmean along an entire cross section of the bolt, under the condition that .DELTA.T is to be not more than a permissible maximum temperature difference .DELTA.To obtainable from the yield stress of the material. The maximum suppliable power by Tmax, .DELTA.T and dimensions of the bolt are obtained, and then a heater is inserted into a small diameter hole of the bolt with hole and the maximum suppliable power, which value is obtained by the above operation, is supplied to the heater so that the bolt with hole is heated to be elongated.

Abstract: A high frequency bar type heater can be inserted into a hole of an object to be heated even if there is an obstruction above the hole. The high frequency bar type heater has a flexible and slender heat resisting and insulating tube (2) having both its ends closed so as to form a water-tight container. A flexible and slender conductor coil (3) is inserted in the heat resisting and insulating tube (2). A magnetic core (5), sectioned in plural pieces in its longitudinal direction, is contained on an inner side of the conductor coil (3). A flexible cooling water pipe (6) is inserted in the heat resisting and insulating tube (2) so as to cool the interior thereof. The high frequency bar type heater thus has flexibility as a whole. The magnetic core may also be formed of a flexible material.

Abstract: A method and an apparatus for inductively heating a refractory shaped member provided with an internal space, particularly for a metallurgical vessel, enable as rapid, uniform heating of the shaped member as possible. An inner inductor is introduced into the internal space, the shaped member is heated from the interior by such inductor, and the inductor then is removed from the internal space.

Abstract: A hinge ball for a variable capacity wobble plate compressor includes a central through hole 27 for permitting a shaft 5 to loosely extend therethrough, and an outer peripheral wall 9b in a convex form for being slidably fit with an inner peripheral wall 43a in a concave form of a boss 43 of a drive hub 41 rotatively fitted on the shaft 5. The shaft 5 is higher in hardness than the hardness of the boss 43 of the drive hub 41, and the outer peripheral surface 9b in sliding contact with the inner peripheral surface 43a of the boss 43 of said drive hub 41 is lower in hardness than the hardness of the shaft 5 and the boss 43 of the drive hub 41 or equal in hardness thereto. The hardness of the inner peripheral wall 9a defining the central through hole 27 is made higher than the hardness of the boss 43 of the drive hub 41.

Abstract: A conformal skate for use in an inductive welding system for creating a fusion bond along a bond line between two thermoplastic parts includes a wheel having a circumferential casing made of fluid impervious flexible material. The wheel is rotatably mounted on a fixed axle by fluid tight bearings. The axle has an axial passage for admission of pressurizing and cooling fluid, and for power leads for the coil and for leads for sensors inside the wheel. A vertical mount on the axle supports the coil for vertical motion and biases the coil downwardly so that it remains in contact with the inside surface of the casing despite unevenness or contour changes in the upper surface of the top part or changes in the wheel shape when the fluid pressure in the wheel or downward force on the axel is changed.

Abstract: An inductive device can heat a body having a slender bore, with an inductor assembly that includes a coolant system. The assembly has a parallel pair of elongate inductors sized to fit deep inside the bore. Each of these inductors has a distal end and a proximal end. The distal ends of the inductors can be electrically interconnected. These inductors are adapted at their proximal ends to connect to a source of current for circulating current along the inductors. The coolant system is adapted to communicate with a source of coolant to circulate coolant along the inductors. The inductors are inserted through the bore of the body to lie lengthwise, without coiling, along the length of the bore. Coolant can then be pumped along the elongate inductors. Then by driving alternating current to flow through the inductors, magnetic coupling to the body occurs to produce heating effects.

Abstract: An induction heating coil for forming a hardened layer in the inner wall of an external cylindrical member to be heated is disclosed. On the inner wall of the conductive induction member, a plurality of recess portions are formed at predetermined spaces circumferentially. The portions of the inner wall of the external cylindrical member to be heated which are opposed to the recess portions can be separately heated, in order collectively to form a plurality of separate partial hardened layers in the inner wall of the external cylindrical member to be heated circumferentially.

Abstract: A pipe impurity removing apparatus and process is provided, in which moisture adhered on the inner peripheral surface of a supply line can be surely removed, regardless of the pre- or post-completion of a piping execution, and the reduction of its working time can be aimed at. The inner peripheral surface of a pipe 30 which constitutes a supply line 3 for a semiconductor manufacturing unit, is coated or surface-modified with chromium oxide 6 which is a dielectric. A purge gas is caused to flow through the pipe 30 from the upperstream side to the downstream side, and an impurity remover 7 is engaged with the pipe 30 and high-frequency induction heating is applied thereto to heat the chromium oxide 6, whereby moisture adsorbed on the chromium oxide 6 is exhausted and removed together with the purge gas indicated by an arrowmark from the inside of the pipe 30 to the atmosphere.

Abstract: A high frequency bolt heater is provided which can heat up the inside of a narrow hole much faster than a conventional bolt heater employing a resistance wire. The high frequency bolt heater includes an induction heating coil made of a copper tube bent in a hairpin fashion and whose shape is made approximately circular in section by pinching a magnet between opposed portions thereof. The heater can be inserted into a hole bored in the axial direction of a metallic bolt. A length of the coil is made approximately equal with that of the bored hole, and the magnet is omitted from a region of the heater which corresponds to a screw portion of the bolt for mounting a nut. An adjustable stopper made of a heat resistant electrical insulator is provided for setting a necessary length of the induction heating coil to be inserted into the hole, and a heat resistant insulator is provided on the surface of the induction heating coil.