Large Mould Processing for The Dustbin Mould

  • For large moulds such as Dustbin Mould(FURNITUREMOULD), there is usually no steel plate of the required size from a toll or forged billet. Even with steel sheets of these sizes, it is less economical to directly process the cavity into such a large metal sheet.

    An important factor is that cast steel should be easy to weld because pits, pores and shrinkage holes often appear on the surface of the casting. Long-term damage caused by thermal shock is common in cast steel, resulting in surface cracks. Welding also usually repairs these.

    The sand casting process is used to produce large mounds of up to about 4 shades per casting (each mould half), resulting in a finished mould weighing up to 10 tons.

    Place the pattern (usually wood) on a sand bed and accumulate more sand around it until the sand reaches the parting line. At this point, the special separation sand is steel on the surface of the sand, making the two halves of the mould easier to separate. The top box is then placed on top of the lower box and filled with sand.

    The riser provides the head of the molten material and allows gas to escape. The flow channel and riser are inserted into the top box and the molten metal is poured into the gate. After the steel has cooled, the box is separated at the parting line and the casting is removed. This casting technique is a term used in injection moulding.

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