Polyurethane material for making chicken manure scraper of farm

Abstract

The invention relates to a polyurethane material for preparing a chicken manure scraper of a farm. The invention is characterized in that: the scraper comprises a support portion and a wedge portion,the height of the wedge portion is greater than the height of the support portion to form a flange, the angle formed by an oblique side of the wedge portion and a bottom side of the support portion is20 to 40 degrees, the oblique side of the wedge portion is perpendicular to an upper side of the support portion, the flange has an angle of 50 to 70 degrees and is rounded; the support portion and the wedge portion are integrally molded; the scraper material is polyurethane; and the scraper material is made of the following parts by weight of raw materials: PTMG is added with TDI, so that the -NCO content in a synthesized prepolymer is 6.8%, and the prepolymer is added to MOCA. The invention has the beneficial effects that the angle of the wedge portion is arranged to fit a conveyor belt, the scraping of the manure is realized, and the polyurethane material has large frictional force to avoid slipping and rusting in the water environment.

Description

Technical field [0001] The invention relates to a polyurethane material used for making chicken manure scrapers in farms. Background technique [0002] In the prior art, broiler farms use stainless steel chicken manure scrapers. This scraper is a flat plate structure. When scraping manure, it cannot be closely attached to the conveyor belt, and the scraping failure phenomenon will occur, causing the chicken manure to deposit on the conveyor belt and affect The transportation of chicken manure affects the environment of the chicken house, and water is often mixed during the transportation of chicken manure, the scraper is slippery and easy to rust, and it damages the conveyor belt, affects the life of the conveyor belt, and has a poor scraping effect. Summary of the invention [0003] In order to solve the problem that the chicken manure scraper cannot be closely attached to the conveyor belt in the prior art, the present invention provides a polyurethane material for making a chic...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the chicken manure scraper cannot be tightly attached to the conveyor belt in the prior art, the present invention provides a polyurethane material for making a chicken manure scraper in a farm. The scraper includes a supporting part, a wedge-shaped part, and a wedge-shaped The height of the part is greater than the height of the support part, forming a convex edge, the angle formed by the hypotenuse of the wedge-shaped part and the bottom edge of the support part is 20-40 °, the hypotenuse of the wedge-shaped part is perpendicular to the upper edge of the support part, and the angle of the convex edge is 50° -70°, and rounded corners; the support part and the wedge-shaped part are integrally formed; the scraper material is polyurethane; The -NCO content in the prepolymer is 6.8%; The prepolymer adds chain extender MOCA; The mass ratio of PTMG and TDI is 2.7:1; The mass ratio of prepolymer and MOCA is 100:19.7; The preparation method is: PTMG Dehydrate 1-2 hours at 100-120°C, vacuum degree 5-10 Torr, water content < 0.05%, cool the dehydrated PTMG to 50-70°C, after the system naturally heats up for 30-40min, at 75-85°C PTMG and TDI are mixed in the mixing head, kept warm for 2-3 hours, defoamed under 5-10Torr vacuum for 10-40min, poured into the mold at a speed of 0.5kg / min-15kg / min, the mold temperature is controlled at 100°C, gel After 60 minutes of demoulding, put the demoulded material into the vulcanization box, and vulcanize at a temperature of 110-120°C for 10-12 hours

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