Lost foam full mold casting process

Abstract

The invention discloses a lost foam full mold casting process, and the process is characterized by comprising the following steps: S1, selecting foam plastic beads; S2, manufacturing a lost foam; S3,coating a model; S4, preparing a casting rough blank; S5, performing post-processing. The invention further discloses a casting manufactured according to the lost foam full mold casting process. The process is simple and easy to implement, small in dependence on equipment, low in casting cost, high in casting efficiency and finished product percent of pass and suitable for continuous large-scale production, the working environment and production conditions of a casting production line can be greatly improved, the labor intensity is reduced, and energy consumption is reduced; a product obtainedthrough casting is higher in size precision and better in inner and outer surface quality, and has higher economic value, social value and ecological value.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a lost foam solid mold casting process. Background technique [0002] With the development of cutting-edge science and modern industry, various industrial sectors increasingly require that mechanical equipment can operate under high parameters (high temperature, high pressure, high speed and high automation) and harsh working conditions (such as severe wear and corrosion) Under the long-term stable operation, the requirements for the performance of materials, equipment and mechanical parts are getting higher and higher. The application and demand market of high-performance special parts has correspondingly grown rapidly, and finding economical and practical methods to obtain high-performance special parts has become a research and development direction in this field. [0003] Lost foam casting technology is an effective method to realize high-performance special parts. Lost foam...

AI Technical Summary

Problems solved by technology

The existing lost foam casting process has insurmountable problems due to equipment cost investment, foam pattern mold (white mold) manufacturing, coating process, pouring process and other technologies: 1. White molds need to be manufactured in the lost foam casting process, white molds It is easy to deform during the manufacturing process (such as: the pre-expansion density of polystyrene beads is small, and the white mold is deformed by external forces such as water pressure during demoulding); If the coating is complete and exposed, sand will stick to it during casting; 3. There is a blind area for sand filling in the white mold; 4. During casting, a. Generally, the cylinder head of the white mold is placed upwards, which can reduce the blind area, but the casting can get There is carbon slag on the surface of the cylinder head; b. The thermal deformation of the gate is also prone to sand sticking, which will affect the quality of the casting

However, first of all, most of these lost foam casting processes are only suitable for cast iron materials; secondly, these lost foam casting processes require an external vacuum system before and after pouring to improve the discharge of white mold pyrolysis products, which greatly increases The complexity of the process operation reduces the production efficiency and increases the production cost