在1991年英国铸协年会上,德国的 Tilch博士对最近出现的各种造型工艺过程作了比较和介绍。Tilch 认为,许多新的造型方法在工厂里的广泛应用,代替了传统的震击、震压和抛砂等方法。从基础理论上看,这些造型方法可以分为一步紧实造型过程(如空气冲击和燃气冲击造型机)和利用真空或高压空气作为预紧实的二步紧实过程。这些造型方法各有特点:作 At the 1991 British Casting Association Annual Meeting, Dr. Tilch from Germany made a comparison and introduction on the various styling processes that have recently appeared. Tilch believes that many new modeling methods are widely used in the factory to replace the traditional method of shock, vibration and sand casting. From the basic theory point of view, these modeling methods can be divided into one step compact modeling process (such as air impact and gas impact molding machine) and the use of vacuum or high pressure air as a pre-compact two-step compaction process. These modeling methods have their own characteristics: make