Analysis of the grinding wheel base
We regard the grinding wheel as the base body. What is the base material? It is the carrier of the abrasive and the binder. It is the leading factor for the resilience of the coating mold. Because it needs some performance, the quality of the grinding wheel can be guaranteed.
(1) The matrix has a strong bonding ability to the bonding agent.
- The base acts as a "carrier" and is firmly bonded. At the same time, the adhesion is determined by two factors, one is the choice of the magazine (its performance), and the other is the surface active energy of the matrix itself (ie fiber type), fabric structure, density.
(2) Kisum must have a certain flexibility.
(3) The base body must have a certain strength and a small elongation. When the base body is applied, it must bear various forces such as tensile load, alternating load, corrosion load and expansion load, and the star strength must meet the application. need. The length of the retardation is a very important property of the matrix. When the abrasive is extended, the abrasive will fall off and lose the grinding ability. For the abrasive belt, the elongation is too much. Exceeding the adjustable range of the grinding machine, the abrasive belt cannot be used.
(4) The surface of the substrate must be complete
There are five main types of substrates for coated abrasives:
(1) Paper is made of particularly strong and tough plant fiber, chemical fiber, etc., which is cheap, low in strength and small in slaughter.
(2) The cloth is made of cotton, hemp, synthetic fibers, etc., which are spun and woven. It has the characteristics of good flexibility, high strength and large extension string.
(3) Gang paper is a vulcanized fiber matrix. It is a very strong multi-fiber roll-pressed base paper and then treated with zncls solution to make the fibers expand and adhere to each other and press together. It has the characteristics of large tensile strength, small extension string, flat surface and heat resistance.
(4) The composite matrix is made of cloth and paper. The general composite matrix has: 1 two-layer paper middle folder--layer fiber mesh cloth, 2 drill a layer of cloth on the paper surface. The composite matrix combines the advantages of cloth and paper with high strength and low elongation.
(5) Non-woven fabric is a method in which natural fibers and synthetic fibers are separately or mixed into a fiber web, and then heated, pressed or bonded to form a sheet and a wide roll (also referred to as a non-woven fabric). .