Analysis of Performance of Automotive Casting Sand Core

The assembly of the core parts of complex automotive parts is done manually on the assembly line of the roller support. Because the binder used in a large amount is waste liquid such as pulp and fat and other materials, the price is low, and the core sand is easily mixed. The performance of the sand core basically meets the need for mass production of automobile castings. This was very advanced in the 50's. However, the sand core must be dried, which undoubtedly increases the energy consumption. Cast iron smelting gray cast iron smelting uses 4 sets of cold air cupolas with a melting rate of 3 t/h, which are divided into two groups of alternating furnaces, and a double smelting system is formed with an arc furnace with a capacity of 3 tons. The production of molten iron cast cylinder blocks, cylinder heads, gearbox housings, clutch housings and brake drum castings.

The malleable cast iron smelting uses two cold blast cupola furnaces with melting rates of two, and is equipped with two arc furnaces with a capacity of 5 tons each to adjust the chemical composition of molten iron, and mainly produces malleable iron castings for the chassis. The sand processing sand processing system was centrally arranged in the workshop sand processing department, and 6 sets of Su-type balance wheel type sand mixers, which were more advanced at the time, were used to supply sand for each of the three molding production lines used for the grey cast iron and malleable cast iron parts. The general casting uses a single sand molding; the cylinder block and the rear axle housing and other important castings adopt the surface sand and back sand molding process.

After the well-mixed sand is uniformly mixed and modified by the intermediate storage tank, it is sent by a belt conveyor to the sand bucket above the molding machine. After the sand is dropped, the old sand is conveyed by a belt conveyor, and the scrap metal in the sand is removed by tumbler crushing, screening, electromagnetic separation, and the like, and then sent to the old sand bucket for reuse. After the clay and pulverized coal have been broken into a powder by the ball mill dry method, they are sent to the hopper above the sand mixer and added to the sand mixer through the quantitative system. After the new sand is dried by the horizontal drying drum, the new sand is sent by the belt conveyor. In the hopper.