模型(或工装)的制造生产是铸造生产的一个主要组成部分,它的费用和生产周期直接影响到铸件的成本和生产准备周期。尽管过去出现了模型费用低生产周期短的刮板造型,但刮板造型仅适合单件或小批量的特殊铸件生产,造型操作不便,生产率低,而且生产的铸件精 The manufacturing of a model (or tooling) is a major component of foundry production, and its cost and production cycle have a direct impact on the cost of the casting and the production preparation cycle. In spite of the fact that scraper shapes with a low production cost and a short production cycle have been used in the past, the scraper designs are only suitable for the production of special castings of single or small batch size, inconvenient operation of molding, low productivity,