Abstract:
A direct resistance heating method includes placing a first electrode and a second electrode on a plate-shaped workpiece such that the first electrodes and the second electrode extend across the workpiece in a direction substantially perpendicular to a center line of a heating target region of the workpiece, the center line connecting a middle portion of one side of the heating target region and a middle portion of the other side of the heating target region; and moving at least one of the first electrode and the second electrode along the center line while applying electric current between the first electrode and the second electrode.
Abstract:
A current applying apparatus includes a pair of electrodes configured to contact a workpiece to apply an electric current to the workpiece, and a bus bar arranged to extend along the workpiece. At least one of the electrodes includes a moving electrode configured to move relative to the bus bar and the workpiece such that an electric current flows between the bus bar and the workpiece through the moving electrode, the moving electrode being connected to the bus bar so as to be movable relative to the bus bar, and the moving electrode being configured to contact the workpiece so as to be movable relative to the workpiece.
Abstract:
A molding apparatus capable of improving the quality of a molded article is provided. A control section (70) controls a blowing mechanism (60) so as to expand and mold a metal pipe material 14 by supplying gas into the metal pipe material (14) held between an upper mold (12) and a lower mold (11) by a pipe holding mechanism (30). The control section (70) controls a driving section (81) so as to mold a flange portion (80b) by crushing a second molded portion (14b) of the expanded metal pipe material (14) in a sub-cavity portion SC between the upper mold (12 )and the lower mold (11). In a molding apparatus (10), the control section (70) changes movement speed of a slide (82) during the molding of the flange portion (80b) by controlling a servomotor (83). Accordingly, it becomes possible to control an operation of pressing at an appropriate movement speed according to the shape or the like of the flange portion (80b). Accordingly, it is possible to improve the quality of a molded article.
Abstract:
A self-limiting shaped memory alloy device, including a shape memory alloy member, with first and second ends, a first anchor member connected to the first end, an energy contact, a second anchor member connected to the energy contact, an energy source connected in energetic communication to the energy contact, a moveable member connected to the second end, and a biasing member operationally connected to the moveable member for urging the moveable member towards and into physical contact with the second anchor member. The moveable member is in physical contact with the second anchor member and the second end is in energetic communication with the energy contact. Actuation of the energy source energizes the energy contact. Energization of the shape memory alloy member initiates a phase change that urges the moveable member away from the second anchor member. Movement of the moveable member away from the second anchor member disengages the second end from the energy contact.
Abstract:
Eye-shield condensation prevention system for use in a ski goggle, dive mask, medical or testing face shield or the like, that prevents undesirable hot spots on the eye-shield and maintains constant heat, with the ability to compensate for variations in resistance encountered from one eye-shield region to another, and/or one eye-shield to another, comprising a power source, a pulse-width modulator, a microcomputer, a heating element, and a sensing circuit. The microcomputer uses the sensing circuit to sense voltage and determine a value of resistance of the heating element. The microcomputer then uses this value to adjust the duty cycle of the pulse-width modulator, and may employ a two-dimensional table in assisting calculation. Multiple pulse-width modulators may be employed that correspond to a plurality of eye-shield regions and a corresponding plurality of heating elements.
Abstract:
Disclosed herein are methods and systems for recovering carbon fibers from objects. The object may include carbon fibers and resin. The object may be contacted with an electric current to separate the carbon fibers from the resin.
Abstract:
A heating method, a heating apparatus, and a method of manufacturing a press-molded article using the heating method are provided. A pair of electrodes is arranged on a workpiece along a first direction. Each electrode has a length extending across a first heating area of a workpiece in the first direction. At least one of the electrodes is moved in the first heating area and along a second direction intersecting the first direction at a constant speed while applying electric current between the pair of electrodes to heat the first heating area by direct resistance heating. The electric current applied between the pair of electrodes is adjusted such that a heating temperature is adjusted for each segment into which the first heating area is divided so as to be side by side in the second direction.