SU833438A1 - Method of producing abrasive cloth - Google Patents

Description

Union of Soviet

Socialist

Republics

DESCRIPTION

Inventions

TO AUTHOR'S CERTIFICATE

(72) Authors of the invention (71) Applicant <11) 833438 (61) Additional to ed. certificate-wu - (22) Declared 23.08.79 (21) 2811526 / 25-08 with the addition of application No. - (23) Priority -

Published May 30, 2018 · Bulletin N9 20

Date of publication of the description 30.05.81 (51) M. Cl. ³

В 24 0 11/00 (53) UDC 621.922.

.079 (088.8)

B. I. Khazanova, E. 3. Shossel, A. V. Smirnova, A. A. Pylnev, E. G. Romanova, N. I. Biktasheva, A. P. Belenko,

N.I. Falchenko and A.A. Arbitan

Ural branch of the All-Union Scientific Research <3 Institute of Abrasives and Grindingi

(54) PRODUCTION METHOD

GRINDING SKIN

The invention .. relates to the abrasive industry and can be used in the manufacture of synthetic-based grinding skins for _ grinding large and complex surfaces in ³ metallurgical, woodworking and engineering industries.

A known method of manufacturing a grinding skin, in which the grinding material is fixed using a binder on the basis of ^ which is taken as a fabric, the inner layer of which consists of twisted yarns of natural, chemical or mineral fibers connected by a synthetic binder, and the outer ones of untwisted yarns from natural, chemical or natural fibers fl].

The disadvantage of this method is to obtain a grinding skin of low elasticity, which is not applicable for the treatment of surfaces with a complex profile · 2 ^

There is also a method of manufacturing a grinding skin, in which the grinding material is fixed by means of a binder based on hydrophilic cotton yarn and hydrophobic synthetic yarn 30, with any weave in a ratio of 10: 1 to 1: 1 (by volume), respectively G21 The disadvantage of this method is to obtain a grinding sand with operational characteristics insufficient for processing large surfaces of parts with a complex profile, there are multiple variable loads of the grinding sand , which leads to shedding of abrasive grain. This disadvantage is obtained as a result of the low adhesion strength of the sizing and binder compositions with fibrous polymers, which have a low adhesive ability due to the underdeveloped fibrous surface.

The purpose of the invention is to increase ex ·? operational characteristics of the grinding skins due to improved adhesion properties of the base with sizing and binder composition.

This goal is achieved by the fact that in the manufacture of the grinding skin, including fixing the grinding material by means of a binder based on a synthetic material, mainly polyester, with rep weave, as

I basis of the grinding skin take a fabric made in one direction from twisted yarn, and in the other from a multifilament yarn.

The twisted yarn thread creates a highly developed fibrous surface, as a result of which its adhesive ability to various finishes is impaired. And the multifilament yarn ensures high strength of the grinding skin.

In addition, the base structure of the grinding skins allows, at a certain density, to obtain a redistribution of tensile loads in the direction of increasing the strength of the grinding 15 skins.

Made grinding sand according to the proposed method · can have a strength along a twisted yarn from 70 to 180 kgf, and along a complex-20 yarn from 140 to 230 kgf.

Alkid-oil varnish, polyurethane adhesives, phenol-formaldehyde resins, phenol-rubber compounds, urea resins, rubbers, etc. can be used as sizing ligaments.

Example 1. The basis of the width

250 mm for the manufacture of a grinding skin, consisting of dacron twisted yarn with a density of 320 N / dm in one direction and complex dacron threads with a density of 560 N / dm in the other direction with rep weaving, is applied with a feyolno ^ 5 rubber Sealant.

SFZh-3029 grade phenol-formaldehyde resin is used as a bond for the base and fixing layers, and grade 63C silicon carbide, 25 grit, is used as a grinding material.

Example 2. The basis of the grinding skin in the form of a sleeve with a perimeter of 1850 mm, with the arrangement of threads as in example 1, is saponified with a composition based on phenol-formaldehyde resin grade SFZh-3029.

As a bond for the main and fixing layers, resin brand SFZh-3029 is used. The manufacturing technology is the same as in example 1 on special equipment.

The proposed method allows to obtain a grinding skin, in which the tensile strength in the transverse and longitudinal directions is 2-3 times greater, the relative elongation is 1.5-3 times less, and the cutting ability is 3-4 times higher compared to a skin made by the known way.

Claims (2)

The invention relates to abrasive production and can be used in the manufacture of synthetic sanding skins for grinding large and complex surfaces in the metallurgical, woodworking and engineering industries. A known method for the manufacture of grinding skins, in which the grinding material is fixed with a binder on the basis of which a fabric is taken, the inner layer of which consists of twisted yarns ti3 of natural, chemical or mineral fibers bound by a synthetic binder, and the outer ones of untwisted yarns of natural, chemical or natural fibers l |. The disadvantage of this method is to obtain a sanding pelt of low elasticity, which is not applicable to the treatment of surfaces with a complex profile. There is also known a method of manufacturing a sanding pelt, in which the grinding material is fixed by means of a binder based on hydrophilic cotton yarn and hydrophobic synthetic yarn, with any weave in a ratio from 10: 1 to 1: 1 (by volume) 2T, respectively. This method is to obtain a sanding cloth with performance characteristics insufficient for processing large surfaces of parts with a complex profile, there are multiple variable loads of the sanding cloth. That leads to shattering of the abrasive grain. This disadvantage is due to the low adhesion strength of the coupling and binder compositions with silk fibers IvI and polymers, which have a low adhesiveness due to poorly developed fibrous surface. . The purpose of the invention is to improve the operational performance of sanding skins by improving the adhesion properties of the substrate with the sizing and binding composition. This goal is achieved by the fact that in the manufacture of sanding pelt, including the fastening of the abrasive material by means of a binder based on a synthetic material, mainly polyester, with a rep weave, the fabric made in one direction of the short-twisted yarn is taken as the basis of the abrasive in another of the multifilament yarn. The twisted yarn yarn creates a highly fibrous surface, as a result. what its adhesion is able to withstand various finishing agents, and the complex thread provides high durability of the sanding pelt. In addition, the base structure of the abrasive cloth allows, at a certain density, to obtain a redistribution of breaking loads in the direction of increasing the strength of the abrasive pelt. The grinding sandpaper manufactured by the proposed method can have a strength along the twisted yarn from yarn from 70 to 180 kgf, and along the complex thread from 140 to 230 kgf. Alkyd-oil lacquer, polyurethane adhesives, phenol-aldehyde resins, phenolic-rubber compositions, carbamide resins, (Rubbers and others. Example 1. A base 250 mm wide for the manufacture of a sandpaper, consisting of from a lavsan twisted yarn with a density of 320 N / dm in one direction and complex lavender yarns with a density of 560 N / dm in the other direction with a rep weave, it is finished with feiol-rubber Sealer. It is used as a tie for the main and fixed layers. phenol-formaldehyde resin SFZH-3029, and as a grinding material, 63C silicon carbide, granularity 25. Example 2. The basis of the sanding pelt in the form of a sleeve with a perimeter of 1850 mm, with the arrangement of the filaments as in Example 1, is applied by a composition based on phenolic SFZH-3029 formaldehyde resin. SFZH-3029 resin is used as a bond for the main and anchor layers. The manufacturing techniques are the same as in example 1 on special equipment. The proposed method allows to obtain a sandpaper, in which the tensile strength in the transverse and longitudinal directions is 2-3 times more, the relative elongation is 1.5-3 times less, and the cutting capacity is 3-4 times higher than the skin. manufactured in a known manner. Claim method The manufacture of a sandpaper, in which the sanding material is fixed on a base made of synthetic material with a rep weave, characterized in that, in order to increase the operational parameters, a fabric made in one direction from twisted yarn is taken as the basis of the sandpaper. and in another of the multifilament yarn. Sources of information taken into account in the examination 1. Japanese patent 49-21346, cl. 74 K 023, published. 1974. 2 .. Patent of England 1008605, class, O 1 K, published. 1965.