484 results about "Feed pressure" patented technology

An apparatus and a method for injecting a liquid dye into a polymer melt, which includes a metering pump with a metering inlet and a metering outlet. The metering inlet connects to a dye tank and the metering outlet connects to a polymer melt carrying component. To add the liquid dye to the polymer melt in the melt carrying component in a quantity that is as uniform and accurate as possible, the invention provides for connecting the metering inlet of the metering pump to a feed outlet of a feed pump, which connects with its feed inlet to the tank. With that, it is possible to generate a feed pressure at the metering inlet of the metering pump, which can be adapted to an injection pressure at the metering outlet of the metering pump.

The invention discloses a device and a method for large-area nano imprinting photoetching. A fluoropolymer-based thin film structure composite soft mould is introduced, and a gas assisting pressing mode and a mould micro-feed pressure pressing mode are adopted in the imprint process. The demoulding is carried out on the basis of low surface energy of a fluoropolymer base by a two-time solidifying and revealing type demoulding method, and thus the large area demoulding can be realized by small demoulding power. The device and the method for the large-area nano imprinting photoetching, disclosed by the invention, realize that a large-area nano-structure can be manufactured on various kinds of substrates, such as uneven (bent, cocked or stepped) substrates, curved substrates, or fragile substrates, and have the obvious advantages of high complex precision, large imprinting area, high efficiency, and low cost and a mould is long in service life. The device and the method for the large-area nano imprinting photoetching are suitable for LED (light emitting diode) nano-imaging technology and manufacturing of optical devices (such as optical lenses), butterfly solar condensers, micro-fluid control devices and the like.

A method for the production of air gases by the cryogenic separation of air can include the steps of sending a purified and compressed air stream to a cold box under conditions effective for cryogenically separating the air stream into an oxygen product and nitrogen using a system of columns, wherein the purified and compressed air stream is at a feed pressure when entering the system of columns; withdrawing the oxygen product at a product pressure; delivering the oxygen product at a delivery pressure to an oxygen pipeline, wherein the oxygen pipeline has a pipeline pressure; wherein during the second mode of operation, the method can include monitoring the pipeline pressure; and reducing the difference between the pipeline pressure and the delivery pressure. By operating the method in a dynamic fashion, a power savings can be realized in instances in which the pipeline pressure deviates from its highest value.

The invention discloses a multi-station punching / assembling composite die. A punching positioning hole, a first punching assembly hole, a second punching assembly hole, a landing edge waste cut-off station, a first blanking station, an idle station and a second blanking station are provided in this order between upper and lower die holders with a progressive punching die as a base body. A furtheridle station and a press riveting assembly station are orderly added between the punching assembly hole and the landing edge waste cut-off station. A press riveting assembly terrace die is arranged on the upper die holder of the progressive punching die at the position of the press riveting assembly station, while a press riveting assembly female die module is arranged on the lower die holder. Two pressure heads are mounted on the two side faces of the upper die holder in a direction parallel to a tape feeding direction, respectively. The structure of the lower die holder of the progressive punching die is changed into a cross-shaped structure from a rectangular structure and the centre of symmetry of the cross-shaped structure is coincident with the centre of the press riveting assembly station. Besides, a gate type automatic feeding mechanism for automatically feeding pressure riveting nuts is mounted on the cross-shaped structure of the lower die holder right under the pressure heads which are disposed on the two side faces of the upper die holder of the progressive punching die. The composite die realizes the continuity and complete automation of production.

A lithographic apparatus includes an illumination system for providing a beam of radiation, an article support for supporting a flat article to be placed in a beam path of the beam of radiation on the article support, a backfill gas feed arranged in the article support for feeding backfill gas to a backside of the article when supported by the article support, and a clamp for clamping the article against the article support during projection. According to one aspect of the invention, the apparatus includes a controller for controlling the clamp and / or the backfill gas feed pressure so as to release the clamp prior to reducing the backfill gas feed pressure.

The invention discloses a feeding pressure and pressing pressure linkage type pressure filter control method and a high-pressure pressure filter. The control method is characterized by comprising the following steps of: before feeding, applying a pressing pre-pressure to the pressure filter, so as to keep a sealing state of a filter board when a filter chamber of the pressure filter is empty; and starting feeding, so that a feeding pressure inside the filter chamber is continuously increased when a material is continuously filled into the filter chamber of the pressure filter, and the pressing pressure applied to the pressure filter is correspondingly increased according to a certain ratio. Compared with the prior art, the feeding pressure and pressing pressure linkage type pressure filter control method provided by the invention has the following advantages and effects of being simple to control and easy to realize; the feeding pressure of the pressure filter is greatly improved, so that the capability of separating filtrate by the material in the filter chamber is improved; and the control reaction is rapid, and the efficiency is high.

The present invention relates to grinding apparatus for grinding the hard metal inserts of rock drill bits, said grinding apparatus having a grinding machine carried on an support system that provides a feed pressure for said grinding machine during grinding, said grinding machine equipped with a grinding pin driven by motor to rotate about its longitudinal axis wherein the grinding cup is rotated at variable speeds and the support system provides a variable feed pressure.

A method and apparatus for managing temperature and pressure of fuel in a fuel tank stored at or near its vapor pressure. In response to fuel feed pressure, a variable ratio of liquid fuel to fuel vapor is extracted from the fuel tank in order to regulate temperature and pressure of the fuel for the purpose of keeping the pressure lower in anticipation of refilling or to assist a vaporizer of the fuel system which is incompletely vaporizing the fuel.

The invention relates to a process method for removing phosphate impurities by combining gravity, centrifugal force and flotation. By the aid of the mineral processing flow sheet of a water-only cyclone, a horizontal screw decanter centrifuge and reverse flotation, the process method includes the steps: (1) taking phosphate ore which is colloid phosphate and setting the content of P2O5 to range from 22% to 27%; (2) grinding the phosphate ore to have -200 meshes larger than 75% by a wet method and setting the solid content of ore pulp to range from 20% to 45%; (3) throwing the ore pulp into the water-only cyclone and setting feed pressure to range from 1.5kg / cm<2> to 2.5kg / cm<2> to obtain first-grade concentrate; (4) feeding tailings in the water-only cyclone into the horizontal screw decanter centrifuge at the speed of 50-100m<3> / h, setting the speed of a rotary drum of the horizontal screw decanter centrifuge to range from 1500r / min to 2500r / min and setting the differential speed of the rotary drum and a screw to range from 10r / min to 50r / min; (5) adding regulators into the concentrate in the horizontal screw decanter centrifuge and regulating the pH (potential of hydrogen) value of the ore pulp to range from 4 to 5; and (6) feeding the regulated ore pulp into a flotation machine, adding 400g / T-600g / T of magnesium removing collectors into the regulated ore pulp, and performing inflation and defoaming to obtain second-grade concentrate. The process method has the advantages that agent consumption in a flotation process is reduced by the process method, other impurities can be removed, the grade of the phosphate is greatly improved, and the recovery rate is also increased.

A fuel injector has a metering valve arranged to open under a predetermined feed pressure which constitutes a first threshold pressure, and to remain open in response to said feed pressure increasing so as to deliver fuel to fuel utilization means. The flow rate of fuel passing through the injector is metered to feed said utilization means so long as the feed pressure remains below a second threshold pressure greater than the first threshold pressure. Above the second threshold pressure, the metering valve behaves like a fixed diaphragm as a function of the fluid flow sections formed therethrough. Individual adjustment means are provided so as to enable said second threshold pressure to be adjusted for each injector to ensure that fuel is injected at a uniform flow rate by all of the injectors in a combustion chamber.

A lithographic apparatus includes an illumination system for providing a beam of radiation, an article support for supporting a flat article to be placed in a beam path of the beam of radiation on the article support, a backfill gas feed arranged in the article support for feeding backfill gas to a backside of the article when supported by the article support, and a clamp for clamping the article against the article support during projection. According to one aspect of the invention, the apparatus includes a controller for controlling the clamp and / or the backfill gas feed pressure so as to release the clamp prior to reducing the backfill gas feed pressure.