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公开(公告)号：US5887639A
公开(公告)日：1999-03-30
申请号：US734860
申请日：1996-10-23
IPC分类号： B22C9/12 , B22C15/23 , B22C15/24 , B22C15/272 , B22C15/276
摘要： A method and apparatus is provided for increasing the packing density and strength of sand for gas-hardening casting molds. The method is characterized by the steps of filling spaces defined by a pattern plate 1 and a mold frame with gas-hardening casting sand 4, depressurizing a closed container 3 after the filled assembly has been conveyed thereinto, introducing air into the container 3, applying a pressure to the upper surface of the casting sand to increase its packing density, and hardening the casting sand by a hardening gas.
摘要翻译： 提供了一种用于提高气体硬化铸模的砂的填充密度和强度的方法和装置。 该方法的特征在于以下步骤：填充由图案板1和模具框架限定的空气与气体硬化铸砂4，在填充组件被输送到其中之后对密封容器3进行减压，将空气引入容器3中，施加 对铸砂的上表面的压力增加其填充密度，并且通过硬化气体使铸砂硬化。
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公开(公告)号：US5558148A
公开(公告)日：1996-09-24
申请号：US435476
申请日：1995-05-05
申请人： Nagato Uzaki , Ukichi Oishi , Ryoji Kanayama , Hironobu Amano , Tokiya Terabe
发明人： Nagato Uzaki , Ukichi Oishi , Ryoji Kanayama , Hironobu Amano , Tokiya Terabe
IPC分类号： B22C15/23 , B22C15/276 , B22C15/28 , B22C15/264
CPC分类号： B22C15/28
摘要： Molding sand (5) is fed into a space defined by a pattern plate (2) and a flask (3) mounted on the pattern plate (2), and the space is enclosed at the upper part of the flask (3) by a cover (6). The air in the enclosed space is evacuated to reduce the air pressure between the grains of the molding sand in the enclosed space to 1 Torr to 150 Torr, and then air is introduced into the enclosed space from the upper part of the space so that the pressure in the space can increase at the rate of 15 atm/s to compress the molding sand (5). The method eliminates the need for vent holes and enables the mold to be crack-free since the air flow is not reflected.
摘要翻译： 将成形砂（5）进料到由图案板（2）和安装在图案板（2）上的烧瓶（3））限定的空间中，并且空间被封闭在烧瓶（3）的上部，通过 盖（6）。 封闭空间中的空气被抽真空以将封闭空间中的型砂颗粒之间的空气压力降低到1乇至150乇，然后空气从空间的上部引入封闭空间，使得 空气中的压力可以以15atm / s的速率增加以压缩型砂（5）。 该方法消除了对通气孔的需要，并且使得模具无裂纹，因为空气流不被反射。
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