46results about How to "Improve collapse" patented technology

It is aimed to enhance adhesiveness between a resist pattern formed on a resist underlayer film and to reduce an undercut of the resist pattern. An additive for a resist underlayer film-forming composition, including: a polymer having a structural unit of Formula (1):(where R1 is a hydrogen atom or a methyl group; L is a divalent linking group; X is an acyloxy group having an amino group protected with a tert-butoxycarbonyl group or a nitrogen heterocycle protected with a tert-butoxycarbonyl group).

The invention discloses pressure-alternated microhole inner surface cavitation and shot blasting equipment and a working method. A positioning device and a magnetic piston motion device arranged faceto face left and right are arranged in an oil tank; an L-shaped baffle plate of the positioning device is fixedly connected with the oil tank; a composite V-shaped block fixedly connected to the bottom wall of the oil tank is arranged under the right side of the L-shaped baffle plate; left and right horizontal workpieces are placed on the composite V-shaped block; the center axis of a cylinder ofthe magnetic piston motion device is collinear with the center axes of microholes; a piston is arranged in a center hole of the cylinder; a sealing cavity can be formed between the microholes and thecenter hole of the cylinder; the right end surface of the cylinder is fixedly connected with an electromagnet; a coil is wound on the electromagnet; two ends of the coil are connected with reversing switches; a driving device is above the magnetic piston motion device; a motor of the driving device can drive a lead screw to rotate; a slide block is matched with the lead screw through a thread; theslide block is fixedly connected with the cylinder; and the volume of liquid in the sealing chamber is continuously changed through a reciprocating motion of the piston for shot blasting reinforcement of the inner surfaces of the microholes so as to achieve high efficiency.

The invention relates to a technology for preventing a cast piece made of a CF8C material from cracking. Due to the fact that cracks are generated easily when CF8C materials are produced, the rejection rate of products is high, and production cost is increased for enterprises. The technology for preventing the cast piece made of the CF8C material from cracking is characterized by comprising the steps that 1, the alkaline phenolic resin sand technology is used for shaping; 2, the carbon content is reduced and the chromium content is increased during alloy smelting; 3, the temperature of a welding area is controlled to range from 110 DEG C to 130 DEG C during welding repair, a small-diameter welding material is used, and multi-layer welding is conducted; 4, heat insulation is conducted for fifteen to twenty minutes when the temperature of quenching water rises to 960 DEG C during solid solution, and then the temperature is made to rise to 1080 DEG C after heat insulation for water quenching. By the adoption of the technology for preventing the cast piece made of the CF8C material from cracking, the number of cracks generated during production of cast pieces is reduced, the rejection rate is reduced, and production cost is reduced for the enterprises.

In one embodiment, a hopper spreader apparatus for spreading granular material is provided. The hopper spreader apparatus includes a hopper, a spreading unit, and a dispensing unit. The hopper has a storage cavity for storing the granular material to be spread. The spreading unit spreads the granular material. The dispensing system transports the granular material from the hopper to the spreading unit. The dispensing system includes a conveying unit and a rotating first roll. The conveying unit conveys the granular material toward the spreading unit. The rotating first roll controls a flow of granular material from the hopper to the conveying unit. The use of the rotating roll allows for control of high flow material (such as for example dry salt) while allowing for improved collapse and break-up of low flow material (such as for example wetted sand).

The invention relates to a tandem type hydrodynamic force sound wave generation device. The tandem type hydrodynamic force sound wave generation device is characterized in that the front end of a cavity is provided with a first spray nozzle connected with a fluid pipeline, the back end of the cavity is provided with a second spray nozzle, the center lines of the first nozzle and the second nozzle are on the same straight line, and a divergent reflector is arranged on the outer wall of the second spray nozzle; the first spray nozzle and the second spray nozzle are connected in series through an oval cavity, two spring pieces can be used for generating different sound wave frequencies, and sound waves generated by the second spring piece are reflected by the inner wall of a reflector and then propagate along the divergent reflector, so that the generated sound waves have directivity. In addition, the tandem type hydrodynamic force sound wave generation device has the advantages of strong cavitation effect, high fluid mixing and emulsifying efficiency, simple structure, stable operation and relatively low cost; and as the movable spray nozzles can be changed and adjusted according to practical requirements, the tandem type hydrodynamic force sound wave generation device is suitable for industrialized application.

The invention provides a gob-side entryretaining method for cutting off a direct roof to make a roadside supporting wall body, and relates to the technical field of underground mining methods. The gob-side entryretaining method includes the steps that A, a gob-side entryretaining bracket is installed at the rear of a bracket of the end head of a working face, and the gob-side entryretaining bracket includes a supporting mechanism, a hole drilling mechanism, a descending mechanism, and a pushing and moving mechanism; B, after working face coal cutting, the gob-side entryretaining bracket is moved by a hydraulic cylinder, and a roof plate is drilled by the hole drilling mechanism; C, a drilling hole is internally filled with medicine and is sealed, and a lifting plate of the lifting mechanism is lifted below the roof plate; D, the roof plate above the gob-side entryretaining bracket is cut off in a blasting mode, and the lifting plate is lowered; E, after the lifting plate is descended to a bottom plate, the pushing and moving mechanism pushes the cut roof plate into a roadway of an gob-side entry through a hydraulic jack; and F, concrete is sprayed at gaps of the cut roof plate, andthe steps from A to F are repeated until the end of stoping. The technical problems of complicated and inefficient gob-side entryretaining construction under the condition of the medium and hard roofplate are solved, in addition, the gob-side entryretaining method further has the advantages of being low in labor intensity, low in entry forming cost and the like.

The invention discloses a non-stoichiometric ratio TiC reinforced copper-based composite and a preparation method thereof and belongs to the technical field of metallurgical composites. The composite is composed of, by mass percentage, 1-5% of non-stoichiometric ratio TiC particles and the balance a base body copper alloy. The base body copper alloy is a Cu-Ni-Sn-Si alloy. The preparation method comprises the following steps of 1, conducting vacuum in-situ reactive sintering on Ti2SnC, Ti3SiC2 and Cu powder to prepare a non-stoichiometric ratio TiC / Cu intermediate material; 2, placing Cu into a vacuum induction smelting furnace, after the Cu is fully molten, sequentially adding Ni, the TiC / Cu intermediate material, Sn and Si into the vacuum induction smelting furnace for smelting, so that a non-stoichiometric ratio TiC / Cu-Ni-Sn-Si powder material is obtained, and then conducting gas atomization treatment on the TiC / Cu-Ni-Sn-Si powder material, so that prealloy powder is obtained; and 3, conducting ball milling, cold pressing for blank production, vacuum sintering, extrusion and heat treatment on the prealloy powder, so that the TiC / Cu-based composite is obtained. The non-stoichiometric ratio TiC reinforced copper-based composite has the beneficial effects of being good in strength, low in friction coefficient, high in abrasion resistance and the like.

The invention discloses a method for producing colored veins for artware. The method comprises the following steps of 1, leaf selecting, wherein high-quality leaves are selected; 2, enzymolysis, wherein after the leaves are boiled with clear water, compound enzyme is added for enzymolysis; 3, bleaching, wherein after veins obtained after enzymolysis are aired to be half-dry, light-shielded bleaching is conducted with a hydrogen peroxide solution; 4, dying, wherein after the veins obtained after bleaching are cleaned, the veins are aired to be half-dry, and dying is conducted with a natural pigment, so that the dyed veins are obtained; and 5, shaping, wherein the colored veins are dried and shaped. According to the method for producing the colored veins for the artware, a compound enzymolysis method is adopted, and after being dried, the veins can still maintain to be soft and is not likely to be fractured; and later-stage processing and shaping of the artware can be conducted conveniently. Meanwhile, safety in the production process is improved; required production time is shortened; and production efficiency is improved.