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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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Design of riser for bridge bearing steel casting

Taking the steel damping bearing as the research object, because of the complex structure of the product, the calculation of the casting modulus by dividing into soft single geometry method has a large workload and low data accuracy, and using three-dimensional engineering drawing to calculate the modulus will be...

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Calculation of riser of bridge bearing steel casting

According to the function, the riser of lost foam casting process can be divided into feeding riser, exhaust slag collecting riser and two functional risers. The feeding riser is usually set above the hot spot of the casting to realize the sequential solidification and ensure the densification of the...

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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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