31results about How to "Change wear resistance" patented technology

A process for producing a composite material comprising the steps of: providing mm-sized particles comprising at least particles of a porous optionally at least partially compressed open-cell melamine formaldehyde resin and mm-sized particles of at least one non-rigid foamed resin; mixing said particles with at least one reactive adhesive in a concentration of 6 to 18 g of reactive adhesive per 100 g of mm-sized particles; reacting said reactive adhesive with said particles in the presence of aerial moisture thereby bonding said particles together during said mixing process; transporting said mixture into a mould; and irreversibly compressing said mixture to a block in a mould without additional heat to a density greater than 50 kg / m 3 to form a block of said composite material; a composite material obtainable by this process; and the use of this composite material for polishing and / or cleaning applications with a liquid.

The invention discloses a preparation method of a surface coating of a high-speed steel screw tap and belongs to the technical field of nano-coatings. According to the method, during film coating, the manner that a cathode arc method and a magnetron sputtering method are combined is adopted; and in the N2 atmosphere, a Ti element is evaporated through the cathode arc method, meanwhile, a C element is sputtered through the magnetron sputtering method, and a TiN / C layer is prepared on the surface of the high-speed steel screw tap in a plated manner. Compared with an existing conventional method, by means of the method, the low production cost is kept, the environment is prevented from being polluted, and the comprehensive performance of the high-speed steel screw tap can be improved.

The invention discloses a micro-dynamic ash-discharging ball valve belonging to the technical field of valves and aims to provide an ash-discharging ball valve with small opening torque, smooth ash-discharging process, good ash-cleaning effect on the surface of the ball valve and reliable seal. The technical scheme of the invention is as follows: the micro-dynamic ash-discharging ball valve comprises a valve body, a valve rod, a valve seat and a valve cover, and the ball body of the ball valve is a hemisphere; the micro-dynamic ash-discharging ball valve further comprises a hemisphere bracketand a metal bloated bag; the hemisphere bracket is fixedly connected with the valve rod; the bottom surface of the bloated bag is installed on the hemisphere bracket; the bottom surface of the hemisphere is connected with the top surface of the bloated bag to form a closed hollow cavity; the cavity of the bloated bag is communicated with a compressed air pipeline; and a double-sided stainless steel sealing ring is fixed on the valve seat and contacted with the surface of the hemisphere. According to the invention, the structure for fulfilling a seal depending on a constant pressure between the sealing ring and the ball body of the traditional ball valve is changed, and a drive torque in opening and closing processes is greatly reduced; a hard seal with an ash-scraping function has the advantages of excellent resistance to abrasion, temperature resistance and environmental protection adaptability; and multiple effects of labor-saving in transmission, smooth ash-discharging process, natural ash-cleaning effect, reliable seal, and the like are fulfilled.

A multifunctional injection moulding machine is composed of a rotary bench with multiple work positions for moulds consisting upper and lower die plates and driven by motor via drive mechanism, and injection moulding unit, a mould closing unit, which is a pressure-holding high-pressure mould locking structure consisting of guide sleeve, beating rod, guide rod and upper and lower die plates, and a hydraulic system consisting of high-pressure cylinder and the booster installed in the center of said rotary bench.

The invention discloses a processing technology of cotton felt. The processing technology of the cotton felt comprises the following steps: (1), cotton blending, wherein the ratio of PET to hollow fiber to LPET is 30%:40%:30%; (2), cotton mixing; (3), opening; (4), carding; (5), cotton laying; (6), hot baking, wherein the temperature is maintained at 220-250 DEG C, and the fan is controlled at 1200 + / - 200 rev / min; (7), rolling, wherein the thickness of the cotton felt is controlled at 10 + / - 2mm; (8), fan cooling: normal temperature; and (9), cutting and shipping. The cotton felt produced bythe processing technology of the cotton felt provided by the invention is small in volume and convenient to transport, and can be reused after being restored to the original state by heating.

The invention discloses an automobile oil return pipe glue stock and a preparation process thereof. The glue stock comprises, by weight, 70-85 parts of nitrile rubber, 15-30 parts of pyridine butadiene rubber, 20-25 parts of spraying carbon black, 1.2-1.5 of stearic acid, 2.0-2.8 parts of canola oil, 1.6-2.0 parts of dibutyl ester, 4-7 parts of sea-foam stone powder, 10-14 parts of quartz powder, 0.8-1.2 parts of anti-aging agents RD, 1.1-1.3 parts of anti-aging agents AW, 1.6-2.0 parts of anti-aging agents ODA, 6.5-7.8 parts of N,N'-meta phenylene bis maleimide, 0.20-0.27 parts of accelerator TMTD and 1.2-1.5 parts of accelerators DM. According to the automobile oil return pipe glue stock, the pyridine butadiene rubber and the nitrile rubber are compounded and used, and proper filling agents and the anti-aging agents are matched, so that the prepared glue stock meets requirements of oil resistance and heat resistance, cold-resistance and aging resistance of an automobile oil return pipe.