131results about How to "Width is easy to control" patented technology

The invention discloses a device for manufacturing a lithium ion secondary battery pole piece and a manufacturing method thereof. The device comprises a coating roller an a base material transfer roller arranged on one side of the coating roller, a scraping knife is arranged above the coating roller, and the other side of the coating roller is provided with a slurry tank; and a trapezoidal material blocking foil is arranged between the scraping knife and the coating roller, one end of the trapezoidal material blocking foil is fixed on the scraping knife, and the other end penetrates through a gap between the scraping knife and the coating roller and is fixed on the slurry tank. Both sides of the trapezoidal material blocking foil are provided with rectangular material blocking foils, one side of each rectangular material blocking foil is fixed on the scraping knife, and the other end penetrates through a gap between the scraping knife and the coating roller and is fixed on the slurry tank. During coating, the middle is left blank, the middle blank is used for manufacturing lugs, adjacent lugs are located in middle relative positions, so that the base material utilization rate is increased, and the production cost is reduced. During coating, the width of the blank has strict requirements, and the trapezoidal material blocking foil can be adjusted up and down, which is convenient to control the width of the middle blank.

The invention discloses graphene with a folded structure. The structure of the graphene is formed by shrinking the graphene in a liquid phase environment to form ups and downs on the surface, wherein the folded parts are cone-shaped, and the height, width and distribution density of the folded parts are uniform and controllable. The folded parts can be formed in the processes of preparing the graphene and transferring the graphene to a target substrate, and are formed randomly and uncontrollably, but the folded structure formed controllably in a liquid phase, disclosed by the invention, can solve the problems. The invention realizes a novel graphene folded structure and provides a method for preparing the structure simply, conveniently and quickly on a large scale, and the graphene folded structure can be used in the fields of new energy resources, sensors, flexible electronic devices and the like.

The invention discloses a preparation and sealing method of a crack-containing rock sample suitable for a multi-field coupling triaxial test. The method comprises the following steps: preparing a complete rock sample; processing rock sample cracks; carrying out water saturation treatment on the crack-containing rock sample; sealing the crack-containing rock sample. By applying the method, cracks can be prefabricated on natural rock, the lengths, the widths and the angles of the cracks are controllable, meanwhile, the problem that confining pressure oil and high-pressure water break through a heat shrink tube at the prefabricated cracks in a multi-field coupling triaxial test to cause sealing failure is also solved, in addition, water pressure can directly act on the cracks in the rock sample, technical support is provided for researching the influence of high-pressure water seepage on crack propagation, and it is possible to simulate the hydraulic mechanical property of crack-containing rock under the condition of real geological environment complex condition thermal hydraulic multi-field coupling through experiments.

The invention discloses an EVA hot melt adhesive film for wall covering and a preparation method thereof. The EVA hot melt adhesive film for wall covering is prepared from 40-70 parts by weight of ethylene-vinyl acetate copolymer, 15-30 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 10-25 parts of ethylene-acrylic acid copolymer, 5-20 parts of polyolefin copolymer, 5-30 partsof tackifier, and 0.2-1 part of antioxidant by premixing and tape casting. The EVA hot melt adhesive film prepared by the invention can quickly bond the wall covering to a wall body, has the characteristics of high adhesion, moisture resistance, mildew resistance and no perishability, and does not contain harmful solvents such as benzene, toluene and xylene; the EVA hot melt adhesive film meets environmental requirements and can replace liquid glue applied to the wall covering bonding. The invention also discloses the preparation method of the EVA hot melt adhesive film for wall covering, andthe method has the advantages of simple process, convenient processing and easy operation.

The present invention discloses an LED lighting source module group. The LED lighting source module group comprises an LED light source (1) and a reflection cup (2) with the bottom open-ended; the LED light source (1) comprises a circuit board (1.1) and a plurality of LEDs (1.2); the plurality of LEDs (1.2) are distributed on the circuit board (1.1); the circuit board (1.1) is disposed at the top of the reflection cup (2); the LEDs (1.2) are disposed in the reflection cup (2); the reflection cup (2) is long strip shaped; the reflection cup (2) comprises a front wall (2.1), a rear wall (2.2) and two side walls (2.3); the two side walls (2.3) are symmetrically disposed at two sides of the front wall (2.1) and the rear wall (2.2); the front wall (2.1) is an inclined surface; the rear wall (2.2) and the two side walls (2.3) are all convex arc-shaped surfaces; and the density of the LEDs distributed at two side portions of the circuit board (1.1) is larger than that of the LEDs distributed in the middle of the circuit board (1.1). The LED lighting source module group has uniform brightness, the glare phenomenon is prevented, reflection angles of the light source by a reflection cavity are relatively large, and formed light spots are relatively ideal.

The embodiment of the invention provides a fabrication method of a low-temperature poly-silicon thin film transistor. The fabrication method comprises the steps of providing a substrate, wherein a poly-silicon layer is formed on the substrate and comprises a first region, a second region and a third region; coating photoresist on the first region and the second region, and performing exposure and first developing to form a photoresist layer; performing a first doping process by taking the photoresist layer as shading so as to form a heavy-doping region on the third region; performing second developing on the photoresist layer so that the second region is exposed; and performing a second doping process by taking the photoresist layer after the second developing as shading so as to form a light doping region on the second region. By the method, a process of yellow light and photoresist stripping can be omitted, and the process cost is reduced.

The invention discloses a rough rolling vertical roll shallow pass treatment method. The method comprises the steps that a to-be-rolled steel blank is determined from a rolling plan; whether width fixing needs to be conducted on the to-be-rolled steel blank through a width-fixed pressure machine or not is judged, and a judgment result is obtained; the width self-learning function of a rough rolling unit is closed; the first opening degree of a front guide board and the width of a first roll seam of a vertical roll are adjusted, and forward rolling is conducted; in the forward rolling process,the to-be-rolled steel blank is processed according to the judgment result and guided in through the front guide board, and the vertical roll serves as a transition roller way to conduct shallow passtreatment on the to-be-rolled steel blank; the second opening degree of the front guide board and the width of a second roll seam of the vertical roll are adjusted, and inverse rolling is conducted; and in the inverse rolling process, the vertical roll serves as a transition roller way to conduct shallow pass treatment on the to-be-rolled steel blank, and the to-be-rolled steel blank is guided outthrough the front guide board. The rough rolling vertical roll shallow pass treatment method provided by the invention can avoid capacity loss caused by halt production and ensure controllability ofthe width of finished products.

The invention provides a fully-mechanized mining gangue-throwing filling hydraulic support and a filling method thereof. The hydraulic support comprises a gangue filling hydraulic support body withouta tamping mechanism, and a gangue-throwing belt mechanism on the rear portion of the gangue filling hydraulic support body without the tamping mechanism. The gangue filling hydraulic support body without the tamping mechanism is composed of a front top beam, a rear tail beam, a base, four stand columns, four connecting rods and a porous bottom-discharge scraper conveyor, wherein the four stand columns and the four connecting rods are used for connecting the front top beam, the rear tail beam and the base; and the porous bottom-discharge scraper conveyor is hung on the rear tail beam. The gangue-throwing belt mechanism consists of a rear seat, a vertical lifting oil cylinder, a belt conveyor, a horizontal pulling and moving oil cylinder and a rear baffle plate, wherein the inclination angle of the belt conveyor is 10-45 degrees. The filling method comprises the following steps that when coal is cut, a rear scraper gangue leakage hole of the filling hydraulic support is opened, the beltconveyor which is arranged behind the rear scraper gangue leakage hole is started, gangue falls onto the belt conveyor from the gangue leakage hole, and a conveying belt rotates at a high speed to throw the gangue into a goaf for filling. According to the fully-mechanized mining gangue-throwing filling hydraulic support and the filling method thereof, tamping is replaced by throwing, the throwingdistance is long, the throwing height is high, the filling efficiency is high, and the fully-mechanized mining gangue-throwing filling hydraulic support and the filling method thereof are widely applied to the fields of coal mine filling mining, gob-side entry retaining and the like.