Raw material drying and mixing plant for molding automobile brake friction material

Abstract

The invention relates to a raw material drying and mixing plant for molding an automobile brake friction material. On the basis of the prior raw material feeding machine for molding the automobile brake friction material, a drying part (30) and a mixing part (40) are sequentially connected between a raw material input part (10) and a weighing part (20); raw materials fed to the drying part (30) are sufficiently dried by a heater (32) on the outer surface of a drying container (34) when being mixed by mixing blades (36); the dried raw materials are fed to the mixing part (40) through the switching operation of a switch plate (50), so that the raw materials are fed to the weighing part (20) after being sufficiently mixed by the mixing blades (40); and in the whole process of feeding raw materials to a molding machine, raw materials with different densities can not become laminated and can keep the optimum moisture content, thereby ensuring no defective products in the process of moldingthe brake friction material.

Description

technical field [0001] The invention relates to a raw material drying and stirring equipment, which fully dries the raw materials before molding various vehicle brake friction materials, and supplies the raw materials to the molding machine in the state of fully stirring the raw materials. Background technique [0002] Brake friction materials for various vehicles, according to the characteristic requirements of different vehicles, need to quantitatively supply raw materials composed of 10 to 20 kinds of resin and non-resin powders with different densities to the molding machine through the raw material supply machine, and carry out the process on the plate surface. For pressure molding, as long as the raw materials are put into the hopper of the raw material supply machine, the raw materials required for each molding can be continuously and automatically supplied to the molding machine in a quantitative manner, and the molding operation can be completed by the molding machin...

AI Technical Summary

Problems solved by technology

[0004] Therefore, even if 10 to 20 kinds of resin and non-resin powders with different densities are fully mixed according to the proportion of each component and then supplied to the raw material input part 100, the powdery raw materials are simply transferred by the transfer blades of the transfer screw 140. When pushing, due to the characteristics of the transfer propeller 140, the raw materials with high density will move downward under the action of gravity, while the raw materials with low density will move upward, so that the raw materials will be layered according to different densities. Some of the raw materials in the lowest layer will accumulate in the gap between the transfer pipe of the transfer screw and the transfer blades, so that the raw material supply is not smooth enough. In addition, after passing through the transfer screw 140 and the weighing unit 120, it will be supplied by the transfer unit 160 In the process of going to the molding machine, the raw materials fall in the order that the high-density raw materials that have a strong gravity fall first at each stage, which intensifies the phenomenon of partial gravity caused by the difference in density. As a result, when the molding machine performs molding, due to the density of raw materials Due to the different weights, not only will there be delamination, but also because of the lack of some high-density raw materials, it will not be able to maintain a smooth appearance, resulting in defective products during the molding process. Due to the decrease in strength of this defective product, it will be rapid when braking. Wear, shorten service life, and reduce brake performance, causing safety accidents

[0005] In addition, when forming brake friction materials, the optimal moisture content of raw materials is 0.4-0.8%. Due to the limitation of operating conditions, a mixer is generally used to stir a large amount of raw materials. However, a large amount of raw materials that have been stirred in advance will increase the moisture content due to the penetration of moisture in the air during the long-term storage process before being put into the molding machine. 100% of the raw material is supplied to the molding machine, and there is no drying process at all. Especially, in the rainy season, the physical properties of the raw material will change due to the sharp increase in moisture content. If this raw material is used for brake friction material molding, it will appear. Cracks caused by changes in physical properties will lead to defective products, which will reduce braking performance and cause safety accidents

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