Joist Steel
During the period of foam curing, hydraulic system needs to provide loading board strong clamping force to overcome foaming force. If the force is directly placed on the board, it would get distorted and eventually destroy the foaming machine. To avoid above condition, we use joist steel to weld some work pieces which corresponds with loading board. In this way, clamping force can be placed equally on the board. Besides, joist steel has high stability during processing and transporting.