Nylon Bushings And Shingles

Cast nylon bushings have many applications in the automotive industry, such as various bushings on the car chassis (bow bushings, rudder wheel bushings, turntable bushings for semi-trailers, etc.). According to statistics, in a loader application of the bushing up to 14 varieties, 28 pieces. High-pressure pump plunger guiding sleeve, the original ZQSu6-6-3 tin bronze manufacturing, pump working pressure of 32MPa, plunger diameter of 80mm, chrome-plated surface, the plunger reciprocating times 150 times/min. Due to the friction of the plunger and guiding sleeve, the plunger surface wear and dechroming, the average service life of only about 3 months. After the guiding sleeve is changed to cast nylon, the life of the plunger is extended by 3 times, and the life of the guiding sleeve is extended by 4~5 times, which saves a large amount of copper, and the effective operation rate of the pump is also greatly improved.

    1. It has self-lubrication, excellent wear resistance, and belongs to a class of materials with high pV value in engineering plastics;

    2. In the case of solid particles invading the friction surface, still maintain good wear resistance;

    3. It is not easy to hold the shaft and does not hurt the journal;

    4. Excellent chemical resistance;

    5. Smaller than the density of the metal, about 1 / 8 of the copper-tin alloy, operation, loading and unloading, easy maintenance.

    Rolling mill in the 1200 eight-roller section steel straightening machine, used for heavy rail section steel straightening, each unit of equipment for the annual workload of 400,000 tonnes. This type of equipment used in the ¢ 400mm copper bushing wear and tear, and often occurs to hold the shaft, forced to stop, resulting in non-normal shutdown maintenance, affecting production. After the use of cast nylon bushings, fundamentally eliminate the holding shaft accident, improve the operating rate of the equipment, to achieve the effect of increased production.

    Another example, the rolling mill 2300 three-roll Lauter-type plate mill with shaft tile, the original use of cotton cloth reinforced phenolic resin tile, the use of short life, often resulting in the production of non-normal downtime, seriously affecting the production of the plant, incurring substantial economic losses. After the use of modified cast nylon shaft tile, service life than the original phenolic ambrose cloth-based resin tile to extend 1 to 3 times, to ensure the normal operation of the mill and safe production, and improve the rate of steel into the material, the direct economic benefits are very significant.

    Iron and steel mills in the 650 mill universal coupling semi-circular shaft tile, originally made of copper, is the main part of the universal coupling. Due to a variety of factors, serious wear and tear, short life, consumption, maintenance is more frequent, directly affecting production. After changing to cast nylon manufacturing, the service life from the original 1 month to more than 4 months, not only saves a lot of copper, saves money, and protects the journal, but also improves the equipment operating rate.

    Various specifications of cast nylon axle tile, sets and sliders in railway locomotives have also been successfully used. For example, 120~220mm diameter rocker tile sets, connecting rod (main) tile sets; 60~100mm diameter rocker tile sets, eccentric rod tile sets, crescent plate ear shaft tile sets; 60mm diameter within the valve device pin sets, spring device pin sets, etc., the use of the characteristics of the pV value of 33.6MPa, can be used safely at a speed of 3.2~3.4m/s.