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一、前言压实紧实是最古老而又最简单的铸造型砂紧实方法,在一般的造型机中,压实方法用得很多,例如:压实、震压、射压等造型机,都应用压实方法。然而,通常的压实方法用于含有高模样的砂型,所得砂型的模样四周紧实度低下,如用多触头高压、震压及射压等复合紧实方法,造型机的结构又比较复杂。此外,若比压不高,则所得砂型的紧实度较低,难以保证铸件的尺寸精确度。反之,若用高压造型,则往往出现砂型回弹大,起模比较困难等缺点。在现代气流冲击和气流渗透等快速紧实方法发展同时,也出现了高速压实方法,按文献报道,高速压实方法具有紧实度高,砂型回弹小,而且在模样比较高的情况下,亦
First, the preface compaction compaction is the oldest and most simple method of casting sand compaction, in the general molding machine, compaction method used a lot, such as: compaction, vibration pressure, pressure and other molding machines are Apply compaction method. However, the conventional compaction method is used to contain high-profile sand molds. The resultant sand mold has low compaction all around. For example, the compaction method of the molding machine is complicated by multi-contact high pressure, vibration pressure and shot press. . In addition, if the specific pressure is not high, then the compaction of the resulting sand type is low, making it difficult to guarantee the dimensional accuracy of the casting. On the contrary, if the use of high-pressure molding, it is often the sand spring rebound, mold and other shortcomings more difficult. At the same time, the rapid compaction method such as the impact of the modern air flow and the infiltration of the air flow has also developed. At the same time, the high-speed compaction method has also appeared. According to the literature, the high-speed compaction method has the advantages of high compaction degree and small sand spring rebound. ,also