摘要:
Heat is extracted from compressed gas used in a blow-molding process by expansion cooling the exhausted gas and/or passing the exhausted gas through a vortex tube, which supplies cold gas at an exit thereof. The cold gas is then routed through cooling channels in the mold. This obviates the need for recirculating or externally chilling a coolant and saves energy.
摘要:
An energy recovery system for a compression or injection molding operation is shown. A Stirling engine cycle is used to recover heat. The Stirling engine is driven by waste heat from the mold members or other associated parts of the injection or compression molding apparatus.
摘要:
A forward power converter with a self-excited synchronous rectifying circuit makes use of the self-excitation function of a transformer to generate electric energy at a secondary side winding coil of the transformer, hence controlling an n-channel FET to accomplish synchronous rectification. In the synchronous rectifying circuit, the drain of the n-channel FET is connected to an end of the secondary side of a first transformer, the source of the n-channel FET is connected to a positive end of a flywheel diode, the negative end of the flywheel diode is connected to the other end of the secondary side of the first transformer, a control end of the n-channel FET is connected to an end of an induction coil via a resistor and a capacitor, and the other end of the induction coil is connected to the source of the n-channel FET.
摘要:
First and second three-phase inverters having self-diagnosing circuits are connected to three-phase windings of a three-phase double-winding type motor, respectively, and first and second servo controllers having self-diagnosing circuits are connected to the three-phase inverters, respectively. When an abnormality occurs in the three-phase inverter or the servo controller, the occurrence of the abnormality is signaled to the servo controller. When abnormality occurs in the three-phase inverter or the servo controller, the occurrence of the abnormality is signaled to the servo controller, thereby stopping rotation of the motor.
摘要:
A carbon dioxide and water adsorbent comprises a carbonized and activated precursor material having first functional sites that adsorb carbon dioxide and second functional sites that adsorb water independently of the first functional sites. The adsorbent is characterized by a total pore volume of between about 1.50 to 2.50 cm3/g, a median pore diameter between about 0.5 to 1.2 nm, and a BET surface area between about 2000 to 2500 m2/g.
摘要:
A fully perfluorinated thermoplastic hollow fiber membrane fluid-fluid contactor and a process for manufacturing the contactor is described. The contactor has a unitary end structure produced by a single step potting and bonding process. The contactor can be operated with low surface tension liquids and in harsh chemical environments.
摘要:
A heat exchanger made of plastic has flow channels for guiding two fluids countercurrently. The heat exchanger includes a cover part; an intermediate layer that at least partially forms the flow channels; and a trough part. The intermediate layer comprises (1) a flow channel for a first fluid comprising channel sections that are spaced apart from one another and (2) a second flow channel comprising opposite flow sections on back of the channel sections for a second fluid guided in an opposite direction from the first fluid. The wall areas that separate the channel sections and opposite flow sections are heat transfer membranes. The cover part and the trough part are connected tightly with the intermediate part, and the intermediate layer is a single piece. The heat exchanger can be used for room ventilation with heat recovery or air conditioning.
摘要:
Described herein is an oily, transparent reaction product which is prepared by heat treating at 110.degree.-220.degree. C. a dicyclopentadiene and a vinyl aromatic compound. This reaction product can be polymerized by ring-opening in presence or absence of a norbornene monomer to produce a thermoset polymer. Freezing point of the reaction product is below 10.degree. C.
摘要:
A process for the production of a marker sleeve assembly which comprises deforming a substantially non-cross-linked web of polymeric material at a temperature below the crystalline melting point or softening point of the material to render the web heat-recoverable, fusing together parts of the web or parts of the web and at least one other polymeric web to define a plurality of radially inwardly heat-recoverable marker sleeves, disposed in side-by-side relationship and preferably separable and subsequently cross-linking the resulting assembly.
摘要:
Apparatus for molding objects from heat-softenable material which may include a plurality of molds, means for continuously supplying heat-softened material for the molds, and means for distributing heat-softened material from the supplying means to each of the plurality of molds. The heat-softened material supplied is removed for recovery, when the distribution of the heat-softened material is interrupted, by extendable-retractable means normally retracted to prevent interference with the distribution of the heat-softened material to the molds. The distributing means is positioned in a predetermined disposition with respect to the supplying means before the extendableretractable means is extended to receive and recover heatsoftened material. Removal and recovery of the heat-softened material may be initiated in response to the coincidence of an interruption of distribution of the heat-softened material and to the location of the distributing means in the predetermined disposition with respect to the supplying means.