Pit Sand Casting Resin Processing Transformation Process And Resin Sand Regeneration System

The company is currently using a self hardening resin sand and processing system,the recycled sand iron ratio,combustion decomposition rate is low,the process parameters of the reclaimed sand and the needs of the actual production do not match,the LOI of reclaimed sand and powder content exceed the standard,and the regeneration effect of the stripping rate has a linear relation with the resin and curing agent in addition,the amount of recycled sand sand surface quality,roundness and particle uniformity in poor condition,reduce production costs and improve the quality of products of the company.are the angle,is to solve the problem of company to be.This article from the resin sand processing system technology and equipment of the actual production conditions of sand on the decision factors of regeneration of resin sand quality of the LOI and the main content of fine powder are studied by the experiments and statistical data,in the analysis of pit casting resin sand process and practical considerations on the basis of the company at present there are resin sand system problems,through the theoretical calculation and analysis,detection and feasibility,proposed the reform plan of resin sand regeneration system.The main purpose of resin sand regeneration is to obtain a stable burning LOI value.Regeneration of resin sand LOI is an important indicator to measure the performance of resin sand,the reasonable control of LOI helps to control gas volume of resin sand,and reduce the addition amount of adhesive,thus effectively reducing the blowhole defects,so as to obtain good economic benefits.Through the analysis and research of pit large casting resin sand molding process and practical operation,in order to find the reclaimed sand tensile strength of technical requirements,currently adding amount of resin,curing agent,the structure of the existing serious exceed the standard;the product determines the iron sand is relatively large,the whole resin sand burning low decomposition rate,the actual stripping equipment rate is insufficient,all these factors led to the company currently recycled sand and powder content exceed the standard loi.Finally,according to the current pit casting resin sand process present situation and existing problems,and the resin sand processing process parameter optimization and analysis,found that reducing the amount of resin and curing agent,increase the amount of new sand,iron sand ratio decreases and other parameters can optimize the quality of the reclaimed sand.But reduce the LOI of reclaimed sand is difficult;through the transformation of the equipment,based on the current level of resin sand regeneration,grade two increases regeneration equipment,improve the stripping rate of sand,can be recycled sand the LOI reduced to the range of the target value,which is to solve the problem of adding amount exceed the standard the resin sand,curing,and improve the quality of resin sand has a great help.