In daily use, many consumers encounter softening issues when cutting materials with cutting discs, especially resin cutting discs, leaving them puzzled and unsure of the cause. Below is a summary to answer these questions.
The production of large-diameter cutting discs is a technical challenge caused by a combination of factors, primarily involving process design, technical route, formulation, and the compatibility of raw materials with the process. Low or excessively high curing temperatures mainly occur when there are sudden and significant changes in air temperature and humidity, coupled with fluctuations in the relevant technical indicators of the raw materials to meet the conditions required for cutting disc production. If the curing curve remains the same as before, the discs will not be produced.
Low hardening stability refers to the combined effects of environmental factors and raw materials. During seasonal transitions or significant changes in temperature and humidity, the maximum hardening temperature of the resin grinding wheel should be provided promptly. High hardening stability means the hardening curve has been adjusted, but if the stability curve decreases and the hardening stability is not adjusted further during dry weather, it can also easily lead to grinding wheel softening.
The hardening curve has a short drying time. This mainly refers to the fact that under specific conditions, the low-temperature drying time of the hardening curve is short and the heating rate is too fast during the heating stage.
Too rapid removal from the furnace or kiln, or excessive temperature difference: Grinding wheels, especially large-diameter ones, require a certain cooling period after the hardening and heat preservation process to allow for the uniform release of stress. If the furnace temperature is too high or the temperature difference is too large, the cooling of the grinding wheel will not be synchronized, leading to wheel deformation. The deformation of the resin cutting disc is also a form of deformation.
The problem of eliminating the humid atmosphere during the hardening process in hardening furnaces: All hardening furnaces, whether box furnaces or tunnel kilns, must consider air intake and exhaust during the design of the furnace. Because a large amount of waste gas (mainly ammonia and water vapor) is released during the hardening process of resin grinding wheels, if this waste gas cannot be discharged in time, it will be re-absorbed by the pores of the resin grinding wheel during the cooling process, causing the grinding wheel to smell bad and become soft.
