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Negative pressure of lost foam casting for bridge support

The main functions of lost foam casting with negative pressure casting are as follows: (1) Compact the dry sand to prevent sand washing, mold collapse and mold wall movement (box expansion). (2) The results show that the speed and quantity of exhaust gas are accelerated, the filling ability of...

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Selection of casting method for bridge bearing steel casting

According to the position of molten metal introduced into the mold, the pouring methods can be divided into top pouring, bottom pouring, side pouring (including step pouring), or the comprehensive use of several pouring methods. The advantages and disadvantages of several pouring methods are as follows. 1.Top casting Advantages:...

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