Lost foam casting aims to produce castings with smooth and flat surfaces to meet customer requirements and reduce post-casting grinding costs. However, improper process control or management oversights often lead to various "excess flesh" defects on the casting surface, such as papular, spiky, blister-like, and garbage-like protrusions, significantly affecting appearance quality and production efficiency.

The product is a kind of middle connecting block used to connect colliders on small coal hauler in coal mine industry, with complex structure and easy deformation.

Preface

The advantages and process characteristics of lost mode casting are especially suitable for the casting of grinding ball. It gives full play to the characteristics of investment casting can be cast in series, and does not need crusts, has the advantages of higher process yield, higher production efficiency and higher product quality. Lost foam casting grinding ball is a relatively simple process in lost foam casting.

Flat plate white mold, yellow mold, runner design, buried box photo and brief introduction of the original scheme

The insulating iron caps used for high voltage power lines were originally produced by coated sand casting. With the advantages of epc in labor cost, energy operation and environmental protection, people began to try to use EPC to produce such castings.This paper describes a variety of lost mold production iron hat casting process practice process, so as to explore the most suitable for lost mold production casting process.

The grate for sintering machine is used to support the high temperature coke and ash slag after combustion. The material is required to be heat resistant and wear-resistant, and the brand is Cr20Mn14Si2N. The outline size of the casting is 70mm high, 40mm wide, 800mm long, the size of the sand box is 2200mm long, 1200mm wide and 800mm high, and the single weight of the casting blank is 19kg.It is required to make full use of the sand box space, 36 or more pieces are poured in a box. The casting technology requires full processing, and casting defects are not allowed on the working surface. Therefore, although the structure of the casting is simple, it has high requirements for casting process and production. The structure of the casting is shown in Figure 1.

This casting adopts lost mode casting process to better ensure the casting size and shape is accurate, has the characteristics of precision casting, and the surface finish of the casting is high. In addition, the sand core and core making work were cancelled, and the casting defects and waste products caused by core making and core lowering were eradicated. It greatly simplifies the molding process and eliminates the casting defects caused by taking the mold and closing the box. Using only dry sand molding also eliminates defects caused by moisture, additives and binders.  There are many kinds of castings, but they are steel castings. This paper takes ear plate as an example to analyze them.

This article refer to the structural features of three products（layer board）,and formulate Lost Foam Casting process that fully fit actrual production conditions,swabbing,baking coating,splicing patterns,modelling and pouring process.

Forklift shovel tooth, as its name implies, is a kind of accessory on forklift. Its special working environment requires shovel tooth to have good wear resistance as well as good strength and toughness. Therefore, material selection, casting process design and pouring process control play a key role and influence on product performance.