In a two-part mold, which is typical of Cast Iron Casting , the upper half, including the top half of the pattern, flask, and core is called cope and the lower half is called drag. The parting line or the parting surface is line or surface that separates the cope and drag. The drag is first filled partially with sand, and the core print, the cores, and the gating system are placed near the parting line. The cope is then assembled to the drag, andthe sand is poured on the cope half, covering the pattern, core and the gating system. The sand is compacted by vibration and mechanical means. Next, the cope is removed from the drag, and the pattern is carefully removed. The object is to remove the pattern without breaking the mold cavity. This is facilitated by designing a draft, a slight angular offset from the vertical to the vertical surfaces of the pattern. This is usually a minimum of 1?or 1.5 mm (0.060 in), whichever is greater. The rougher the surface of the pattern, the more the draft to be provided. sand casting, cast iron casting

Cast Iron Casting

Sand Casting -Radiator Body

Model:Sand Casting -Radiator Body

The molten material is poured in the pouring cup, which is part of the gating system that supplies the molten material to the mold cavity. The vertical part of the gating system connected to the pouring cup is the sprue, and the horizontal portion is called the runners and finally to the multiple points where it is introduced to the mold cavity called the gates. Additionally there are extensions to the gating system called vents that provide the path for the built up gases and the displaced air to vent to the atmosphere.

The cavity is usually made oversize to allow for the metal contraction as it cools down to room temperature. This is achieved by making the pattern oversize. To account for shrinking, the pattern must be made oversize by these factors, on the average. These are linear factors and apply in each direction.

Cast Iron Casting

Model:Cast Iron Casting

Since the second half of 20th century, RenYi has been an OEM die casting manufacturer of machined & un-machined castings and forgings in a variety of industries. Today, we manufacture over 1, 000 products-everything from single flange to customized street lamps. RenYi are continuing to refine our role as a technical expert, quality leader and fast reactor.

At Shanxi base, we have over 500, 000 square meters of workshop, warehousing and production facilities. We have 4 automatic moulding machine lines, CAD machining center, professional laboratory, own pattern & tooling shops and most important-a group of highly experienced and technically qualified staff.