39results about How to "Small pressure" patented technology

An object of this invention is to provide such a welded structure of and welding method for two metallic parts fitted together at a tubular section in a high-pressure fuel supply pump, that enables rapid joining of both metallic parts by staking (press-fitting included), screw fastening, and / or laser welding, offers high welding strength and sufficient fluid sealability, and keeps the metallic materials free from thermal changes in composition. While an electric current is supplied to any one of the welding connection surfaces formed between a pump housing and cylinder in a high-pressure fuel supply pump, between the pump housing and an installation flange, between the pump housing and an intake or discharge joint, between the pump housing and a pulsation-absorbing damper cover, between the pump housing and a relief valve mechanism, and between the pump housing and an electromagnetically driven intake valve mechanism, the particular two sections are pressed against each other to generate, along the connection surface, a plastic flow not causing melting or fusion due to heat, and form a diffusion-weld region at the connection surface by using the plastic flow and the application of the pressure.

The invention provides a method and equipment for batch production of AR diffracted optical waveguides. According to the invention, low-cost batch production of large-area AR diffractive optical waveguides (surface embossment tilted gratings) in any shape can be realized, two-photon polymerization micro-nano 3D printing is adopted to achieve manufacturing of the tilted grating large-area mother set in any shape (on one hand, the problem of manufacturing of the tilted grating mother set in any shape is solved, on the other hand, direct manufacturing of the large-size wafer-level mother set canbe achieved, and the advantages of being low in manufacturing cost and high in production efficiency are further achieved). By adopting a composite nanoimprint lithography technology (combining with an imprint special suitable for an inclined grating imprint process and a composite soft mold), the problem that an inclined grating with a large inclination angle and a large groove depth cannot be manufactured due to the fact that demolding cannot be conducted is solved, and unconstrained (geometrical shape and size) manufacturing of the inclined grating is achieved.

The invention relates to a device and a method for nanoimprinting of a full wafer, comprising a working platform, a full wafer coated with an etchant resist, a nozzle for demoulding, a template, an imprinting head, a pressure pipeline, a vacuum pipeline and an ultraviolet light source, wherein the template is fixed on the bottom surface of the imprinting head; the side surface on the lower part of the template is equipped with the nozzle for demoulding; the pressure pipeline and the vacuum pipeline are connected to air inlet holes which are arranged on two side surfaces of the working platform of the imprinting head; the full wafer coated with the etchant resist is fixed on a wafer working platform; and the ultraviolet light source is arranged over the imprinting head. The method providedby the invention comprises the following steps of: 1) pre-treating process; 2) imprinting process; 3) curing process; and 4) demoulding process. The device and the method for nanoimprinting of the full wafer provided by the invention have the characteristics that the structure is simple, the cost is low, the production efficiency is high, the accuracy is high, the imprinting area is large, and the suitability for the batch production and the imprinting of the full uneven wafer can be obtained. The device and the method can be applied to the large-scale manufacturing of high-density disc, micro-optic device and micro-fluidic device and the like, and the device and the method are particularly suitable for the imaging of the full wafer of a photonic crystal LED (Light Emitting Diode).

A deformation measurement sensor for measuring pressures and shearing forces according to the present invention includes: a plurality of beams shaped like a lattice; a strain gauge attached to each of the plurality of beams for measuring a deformation rate; a frame connected to the end of the lattice shape for surrounding the plurality of beams; and holes for arranging lines and formed in the intersections of the plurality of beams, whereby it is possible to precisely measure the deformation rate depending on the pressures or shearing forces exerted to a plurality of areas.

The invention discloses a cavity type structured nano imprinting template and an imprinting forming method therefor. The cavity type structured nano imprinting template adopts an integrated structure, and comprises an upper template and a lower template which are welded together, wherein multiple thorough stepped holes are uniformly formed in the upper template; multiple trenches are uniformly formed in the lower template; and the two ends of the trenches are connected with an external high-pressure water pump and a vacuum pump through pipelines. According to the cavity type structured nano imprinting template, a sealed hollow cavity is additionally formed in the template, so that negative pressure is formed by vacuumizing the cavity of the template in the imprinting process; and in a demolding process, cracks are generated on the interface of the template and imprinting adhesive through water pressure, and then the cracks extend to the overall combination interface to complete the demolding. Compared with the prior art, the cavity type structured nano imprinting template has the beneficial effects of simple and convenient operation, low required pressure for imprinting, good forming quality and the like, so that the cavity type structured nano imprinting template is suitable for forming a normal imprinting structure and particularly suitable for forming an imprinting structure with high aspect ratio.

A three-way (3-way) Micro-Electro-Mechanical Systems (MEMS)-based micro-valve device and method of fabrication for the implementation of a three-way MEMS-based micro-valve are disclosed. The micro-valve device has a wide range of applications, including medical, industrial control, aerospace, automotive, consumer electronics and products, as well as any application(s) requiring the use of three-way micro-valves for the control of fluids. The discloses three-way micro-valve device and method of fabrication that can be tailored to the requirements of a wide range of applications and fluid types, and can also use a number of different actuation methods, including actuation methods that have very small actuation pressures and energy densities even at higher fluidic pressures. This is enabled by a novel pressure-balancing scheme, wherein the fluid pressure balances the actuator mechanism so that only a small amount of actuation pressure (or force) is needed to switch the state of the actuator and device from open to closed, or closed to open.

The invention discloses a method for manufacturing a well casing. The method comprises that: a concrete mixture is evenly put into or poured into a rotary well casing mould through openings at two ends of the well casing mould; and an iron roll is put into a port of the rotary well casing mould to roll the concrete mixture in the well casing mould repeatedly, and the concrete mixture is compacted. The method for manufacturing the well casing has the advantages of simple operation, high concrete strength, little damage to a body of the well casing, and high integrated intensity of the manufactured well casing.

The invention relates to a method for forming a grating for machine tool measurement in a two-step solidifying rolling pressing forming manner, which comprises the following steps: 1) coating an ultraviolet light solidifying adhesive layer on a grating blank substrate; 2) manufacturing a rolling mould having a prototype grating structure on the surface of a cylindrical mould, making an alignment mark, and polishing and performing low surface energy treatment on the surface of the rolling mould; 3) coating a flexible film on the adhesive layer on the grating blank substrate, carrying out primary exposure and peeling the film; 4) comparing the alignment mark on the grating blank substrate with an acquired alignment mark image on the surface of the rolling mould, adjusting and calibrating; 5) gluing the rolling mould with the grating, applying a pressing force, and compounding the prototype grating structure on the surface of rolling mould on the adhesive layer on the surface of the substrate; 6) carrying out exposure on the compounded ultraviolet light solidifying adhesive layer; and 7) collecting and packaging the grating. According to the method, the required pressing force is small, and thus, the substrate deformation and stress concentration are avoided. The method has high production efficiency and can be used for realizing the mass production of the grating for large-area and altitude machine tool measurement.

The invention provides a combined type body posture pad for operation, and belongs to a body posture fixing device. The combined type body posture pad for operation comprises a head fixing member, a cervical vertebra holder and a shoulder pad, wherein the head fixing member, the cervical vertebra holder and the shoulder pad are made of polyurethane gel, the head fixing member if of a circular shape, the hollow part of the head fixing member corresponds to a cranium occipitalia, the bottom of the cervical vertebra holder is planer, the top of the cervical vertebra holder is of a cambered surface, a concave holding surface is arranged on the top center of the cervical vertebra holder, and the shoulder pad is cylindrical. An aseptic cover is arranged on the external of each of the head fixing member, the cervical vertebra holder and the shoulder pad. The combined type body posture pad, when used in a body posture placing process for an anterior cervical operation, has the advantages of being convenient for use, being firm for fixing a neck portion and being light in skin compression. The comfort level and operation convenience for a surgeon are improved.

The invention discloses a method for manufacturing a well casing. The method comprises that: a concrete mixture is evenly put into or poured into a rotary well casing mould through openings at two ends of the well casing mould; and an iron roll is put into a port of the rotary well casing mould to roll the concrete mixture in the well casing mould repeatedly, and the concrete mixture is compacted. The method for manufacturing the well casing has the advantages of simple operation, high concrete strength, little damage to a body of the well casing, and high integrated intensity of the manufactured well casing.