42results about How to "Limit thickness" patented technology

The invention belongs to the technical field of printed circuit boards, and concretely relates to a multichip typesetting substrate. The multichip typesetting substrate comprises a frame (2) and multiple child substrates (3), the frame (2) and each child substrate (3) as well as the child substrates (3) are connected through multiple connecting mechanisms (8), and each connecting mechanism (8) comprises at least a mechanical limiting connection mechanism (4) which is used for limiting the child substrate (3) to move in two directions perpendicular to the surface of the frame (2). The invention also discloses a manufacturing method of the multichip typesetting substrate. The multichip typesetting substrate disclosed by the invention can reliably limit the child substrates to move in two directions perpendicular to the frame (2), therefore, the connecting strength between the child substrates, or between each child substrate and the frame, is greatly improved.

The invention relates to a full-automatic continuous filtering and filter pressing slag unloading machine comprising a filtering device, wherein the filtering device comprises a filter cartridge, a filtering stirring shaft and a first filtering medium; a liquid inlet is arranged on the top end of the filter cartridge; the filtering stirring shaft is installed in the filter cartridge through a sealing bearing, and a helical blade is arranged on the filtering stirring shaft; the first filtering medium is arranged between the inner wall of the filter cartridge and the filtering stirring shaft; a liquid outlet is arranged on the bottom end of the filter cartridge; and a press filtering device, the press filtering device comprises a press filter cartridge, a press filtering stirring shaft and a second filtering medium; a slag inlet is arranged on the top end of the press filter cartridge, and the slag inlet is communicated with the liquid outlet; the press filtering stirring shaft is installed in the press filter cartridge through a sealing bearing, and a helical blade is arranged on the press filtering stirring shaft; the second filtering medium is arranged between the inner wall of the press filter cartridge and the press filtering stirring shaft; and a slag outlet is arranged on the bottom end of the press filter cartridge, and an automatic resetting switch is arranged at the slag outlet. The full-automatic continuous filtering and filter pressing slag unloading machine provided by the invention can be conducted with continuous pressure filtration, can automatically feed and automatically discharge and unload slag and is consistently located at a thin layer filtering environment, so that the filtering speed is high, and the machine is operated under a complete sealed state, and the operation environment is excellent.

The invention discloses a blue brick for repairing an ancient building wall. The blue brick comprises a brick blank and coating, wherein the brick blank comprises the following components: plastic clay, an inorganic dispersant, a pigment, a reinforcing fiber, an orange-peel agent, a water reducing agent and aggregate; the coating is petroleum asphalt coating. According to the blue brick for repairing the ancient building wall, after the surface of the brick blank is treated by a liquid petroleum asphalt diluent, on one hand, the attached liquid petroleum asphalt can enhance the anti-acid corrosion and anti-weathering effects, and after use, a time-induced special sense of vicissitudes can be formed on the surface of the brick; the blue brick for repairing the ancient building wall is low in cost, wide in raw material sources, and high in anti-corrosion, wear-resistant and anti-weathering effects; in addition, after restoration, cracks on the surface of an ancient building and the time-induced special sense of vicissitudes can be still maintained, so that a sense of repairing the ancient building as an old building is achieved; the blue brick is an environment-friendly and safe novel building material.

The invention discloses a self-centering and anti-overturning split type return stroke plate, which comprises two concentric discs, where the front end of the lower disc is provided with an enhanced limit boss and a sliding shoe oil film thickness limit boss, a sliding shoe hole of the lower disc is formed by the connection of equal-radian nine inferior arcs which are arranged around a spherical hinge supporting hole axis inside the limit boss, nine equal-radian small kidney-shaped grooves are formed around the spherical hinge supporting hole axis in a spherical arc surface boss at the rear end surface of the lower disc, small kidney-shaped grooves are communicated with an oil chamber on the bottom surface of slid shoe through an oil passing hole; a slide shoe hole is formed by the connection of equal-radian nine major arcs which are arranged around the spherical hinge supporting hole axis of the upper disc. The self-centering and anti-overturning split type return plate can complete the reliable return stroke of an axial piston pump plunger sliding shoe component in an oil absorption area, the return stroke plate is designed to be matched with a spherical surface of a swash plate, so that the force condition of the return stroke plate is good, automatic centering is strong, the split type return stroke plate has a capability of anti-overturning; the structure of the return stroke can effectively avoid the eccentric wear caused by the directly contacting of the sliding shoe and the swash plate, the maximum oil film thickness of a slide shoe pair is limited, and the mechanical efficiency and volume efficiency of a pump can be improved.

The invention relates to a piston with a (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on the surface and a preparation technology and application of the piston. The structure of the piston comprises two schemes. According to the first scheme, the piston comprises a base, a TiAl transition layer and a TiAlN clad layer, and the TiAl transition layer evenly wraps the base; and the TiAlN clad layer evenly wraps the TiAl transition layer. According to the second scheme, the piston comprises a base, a first TiAl transition layer, a first TiAlN clad layer, a second TiAltransition layer and a second TiAlN clad layer, and the piston structurally comprises the base, the first TiAl transition layer, the first TiAlN clad layer, the second TiAl transition layer and the second TiAlN clad layer in sequence. According to application of the piston, the piston is used for an internal combustion engine. The designed piston surface has heat insulation performance, wear resistance, oxidation resistance and heat shock resistance, and the service life of the piston is effectively prolonged.

The purpose of the present invention is to provide a liquid for forming a microstructure film on a metal surface with which, by the simple immersion of a metal product in the liquid or the application or spraying of the liquid onto the metal product, it is possible to completely remove rust from the surface of the metal product, form a microstructure film having crystals or irregularities of 1 µm or smaller on the surface of the metal product such that the surface area is increased, impurities are prevented from penetrating inside the crystals, and the film easily imitates deformation of the metal substrate. The liquid for forming a microstructure film on a metal surface comprises, as the essential components, phosphoric acid, an inorganic acid, a nonionic fluorine surfactant, and water, and contains 2 to 60 mass% of phosphoric acid, 0.02 to 5 mass% of an organic acid, and 0.005 to 0.2 mass% of a nonionic fluorine surfactant.

A method for enhancing oxidation work piece by physical gas-phase depositing method and the work piece therewith are disclosed. The process is carried out by impacting work piece surface to remove oxidation film by energy-carrier ion under vacuum, depositing non-oxidation metal(Au, Pt etc.) or metal(Al, Cr, Ni, Ti etc) layer with thickness 0.01-2 micron on work piece surface, heating work piece to requested temperature, impacting work piece surface to remove deposited metal and / or oxidation film by energy-carrier ion and depositing hard film layer or other film layer on work piece surface by normal physical gas-phase depositing method.

The invention discloses a light emitting diode epitaxial wafer and a manufacturing method of the light emitting diode epitaxial wafer, and belongs to the technical field of semiconductors. The epitaxial wafer comprises a substrate, a nucleating layer, a buffer layer, an undoped GaN layer, an n-type layer, a multiple-quantum-well layer, a first p-type GaN layer, a second p-type GaN layer, an electron barrier layer and a p-type layer, wherein the nucleating layer, the buffer layer, the undoped GaN layer, the n-type layer, the multiple-quantum-well layer, the first p-type GaN layer, the second p-type GaN layer, the electron barrier layer and the p-type layer grow upwards on the substrate. The thickness of the electron barrier layer ranges from 50 nm to 150 nm, the growth temperature of the first p-type GaN layer ranges from 600 DEG C to 800 DEG C, the growth pressure of the first p-type GaN layer ranges from 400 Torr to 800 Torr, the growth temperature of the second p-type GaN layer ranges from 800 DEG C to 1000 DEG C, the growth pressure of the second p-type GaN layer ranges from 50 Torr to 500 Torr. The first p-type GaN layer growing under high pressure and low temperature is arranged, and a hole injection channel is provided, so that hole injection efficiency is improved; through the second p-type GaN layer growing under low pressure and high temperature, crystalline quality is improved, the thickness of the electron barrier layer is limited, and hole injection efficiency is improved.

The invention relates to an adapter for vacuum pumps, characterized in that it comprises an annular inlet flange (15) intended to be coupled to an outlet orifice of a chamber and an outlet coupling (16) comprising at least two cylindrical outlet through-housings (21) and forming an at least partial pump casing for the case (4) of a respective turbomolecular vacuum pump (3), said turbomolecular vacuum pumps (3) being intended to be received in a respective cylindrical outlet housing (21). The invention also relates to a pumping device, characterized in that it comprises an adapter for vacuum pumps (2) as described hereinabove and at least two turbomolecular vacuum pumps (3) housed at least partially in a respective cylindrical outlet housing (21).