摘要:
A method for die-casting a magnesium alloy comprises the step of casting a die cast product free of any hot tearing, shrinkage tearing and shrinkage cavity starting from a magnesium alloy comprising i) 1 to 10% by weight of aluminum; ii) at least one member selected from the group consisting of 0.2 to 5% by weight of a rare earth metal, 0.02 to 5% by weight of calcium and 0.2 to 10% by weight of silicon; and iii) not more than 1.5% by weight of manganese, and the balance of magnesium and inevitable impurities, using a cold chamber type die-casting machine, wherein a) the temperature of the molten magnesium alloy is maintained at 650 to 750°C.; b) the charging velocity of the molten metal is set at {fraction (1/100)} to {fraction (10/100)} second; and c) the intensified pressure after the charging is set at a level of not less than 200 kgf/cm2. Thus, a die cast product free of any hot tearing, shrinkage tearing and shrinkage cavity can be produced by appropriately specifying injection conditions, mold conditions, conditions for melting a magnesium alloy and mold plan in the cold chamber type die-casting machine, or by appropriately controlling the temperature of the molten metal from the molten metal-accommodating pot to the gate portion of the machine.
摘要:
The present invention concerns synthetic mica powder containing from 75 to 99% of the stoichiometrical composition of fluorine and/or having a shape in which the end face of a particle is laminated, a process for producing such synthetic mica powder, as well as cosmetics having synthetic mica powder blended therewith, in which the synthetic mica powder shows no leaching of fluorine ions and/or improved hold of oils due to lamination at the surface of the powder. Accordingly, in this invention, cosmetics excellent in extensibility, gloss, adherence and moldability, having an appearance of high chroma and of high stability and safety can be obtained.
摘要:
An air supply control system for an internal combustion engine comprises at least first and second turbosupercharger, an exhaust cutoff valve operative selectively to open and close an exhaust passage in which a turbine of the second turbosupercharger is disposed, an intake air cutoff valve operative selectively to open and close an intake passage in which a blower of the second turbosupercharger is disposed, a cutoff valve controller operative to control the exhaust cutoff valve and the intake air cutoff valve so as to cause the first turbosupercharger to work when intake air mass flow fed to the engine is to be relatively small and to cause both of the first and second turbosuperchargers to work when intake air mass flow fed to the engine is to be relatively large, an engine operation detector, and an operation controller operative to vary, in response to an engine operating condition detected by the engine operation detector, a boundary between first and second operating areas provided on an operating characteristic chart of the engine respectively for a first supercharging operation in which the first turbosupercharger works but the second turbosupercharger does not work and a second supercharging operation in which both of the first and second turbosuperchargers work.
摘要:
In an electric shutter operating circuit for use in a photographic camera of the class wherein the operation of the shutter is controlled in accordance with the brightness of an object, and information regarding the iris opening and the photosensitivity of the film used, there are provided a photoelectric element for generating an electric signal corresponding to the brightness, means for generating information signals regarding iris opening and the photosensitivity, a comparator circuit for comparing the electric signal and the information signals, means to feedback the output of the comparator circuit to the input thereof, a memory capacitor connected on the output side of the comparator circuit for storing an electric quantity corresponding to the brightness, an amplifier connected to respond to the terminal voltage of the memory capacitor, and means responsive to the output of the amplifier for controlling the operation of the shutter of the camera.
摘要:
In an embodiment managing a cache includes determining from metadata of a received service request whether a cache data response may satisfy the request as a function of recognizing a cacheable method name specification within request metadata by a service provider associated with the request, the embodiment further including determining whether the request is an inquiry or a request as a function of comparing an update frequency specification in the request metadata to a value of a time parameter associated with the cacheable method name in the metadata if the request may be satisfied by the cached data. The embodiment also includes searching the cache for the data response if determined the data is cacheable and the request is an inquiry, and sending the request on to a service provider if the data response is not a cacheable response or the request is an update request.
摘要:
The present invention provides a pearlescent pigment, which solves the problems such as development of yellow color at mass tone angle or shade side and non-clearness of interference colors. The pearlescent pigment coated with a metal oxide on a synthetic mica of the present invention is characterized in that said synthetic mica has average refractive index of not more than 1.58, surface of synthetic mica particles is smoothened and made flaky, and iron content in the synthetic mica is not higher than 1.0%.
摘要:
An air supply control system for an internal combustion engine comprises a supercharging device operative to perform selectively a first supercharging operation by which supercharging efficiently under a first condition wherein the engine operates with relatively small intake air flow is improved and a second supercharging operation by which supercharging efficiency under a second condition wherein the engine operates with relatively large intake air flow is improved, an operation detector for detecting engine operations, a traveling condition detector for detecting traveling conditions to a vehicle equipped with the engine, a supercharging operation controller operative to cause the supercharging device to perform the first supercharging operation when a first engine operation attended with relatively small intake air flow is detected by the operation detector and to perform the second supercharging operation when a second engine operation attended with relatively large intake air flow is detected by the operation detector, and an operating area changer operative to vary, in accordance with traveling conditions detected by the traveling condition detector, a boundary between first and second operating areas provided on an operating characteristic chart of the engine for defining the first and second engine operations, respectively.
摘要:
A method of controlling a system having an internal combustion engine, a filter in an exhaust passage, a reduction catalyst downstream of said filter capable of reducing nitrate oxide contained in the exhaust gas with reductant supplied thereto is provided. The method may include, in a first mode, combusting a first amount of particulate matter trapped in said filter and supplying a first amount of reductant to said reduction catalyst when an amount of particulate matter trapped in said filter is less than a predetermined trapping amount (α). The method may further include, in a second mode, combusting a second amount of particulate matter that is greater than said first amount of particulate matter and supplying a second amount of reductant to said reduction catalyst when an amount of particulate matter trapped in said filter is equal to or greater than said predetermined trapping amount (α).
摘要:
In a printing press abnormal state display method, the current states of a plurality of elements of a printing press are detected. The detected current state of each element is compared with a normal state predetermined for the element. It is determined on the basis of the comparison result whether the current state of the element is abnormal. The abnormal state of only an element determined to be abnormal is displayed on the basis of the determination result. A printing press abnormal state display apparatus is also disclosed.
摘要:
A soil activator which contains soluble state calcium and magnesium. The soluble state calcium is easily absorbed into plants in the soil and easily moves inside the plants after being absorbed. The soil activator is made by heating and stirring a soil activator composition containing food waste, dolomite, and quicklime. Agricultural crops obtained using the soil activator have significantly increased calcium content.