Analysis and suggestions on quality systems; Grindwell Norton Ltd.

Abstract

The maker is a huge machine that is used to coat the backing material with abrasive. The finished cloth which comes from CFL is put on an unwinder. The cloth then passes through a printer. The printer is a roll on which the impressions to be printed are laid out. The printer half dips in ink and produces impressions on the back of the cloth’as cloth rols over the printer. The cloth is then made to pass between two rollers, one of which is half dipped in Tesin or glue. The speed, direction of rotation, and distance between the rollers are adjusted depending on the product to be produced. After resin is applied, the cloth passes under a hopper through which abrasives are sprinkled on the cloth. This.is the gravity method of coating. Alemately, the coating could be through the Electro Static method where the cloth and grains get oppositely charged and the grains get atiracted to the cloth thereby forming a uniform layer on the cloth. During coating, parameters such as quantity of grain per una area of cloth needs to be controlled. After coating, the cloth passes through an oven. The oven has three zones kept at different temperatures to cure and dry the coated abrasive cloth. At the end of the oven is a winder onto which the cloth winds on. This process is called the make process. There is a dwell ime for which the roll has to be kept before it is taken for the next operation ration which is called sizing.