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Mold Composition

Sand Casting Mold And Tooling Composition

The picture shows the sand mold after the box is closed. The molding sand that is pounded tightly in the upper and lower flasks, together with the upper and lower flasks, is called the upper sand mold and the lower sand mold, respectively. After taking out the pattern from the sand mold, the cavity left behind is called the cavity. The interface between the upper and lower sand molds is called the parting surface. The part with “X X X” in the cavity in the figure represents the core, which is used to form the hole on the casting. The part of the core used to place and fix the core is called the core head, and the core head is placed in the core seat. When pouring, the molten metal is poured from the outer gate, and flows into the cavity through the straight gate, the horizontal gate, and the inner gate.

  • a.Upper sand box
  • b.Upper sand type
  • c.Parting surface
  • d.Lower sand box
  • e.Sand type
  • f.Core seat
  • g.Core head
  • h.Core
  • i.Cavity
  • j.Sprue
  • k.Runner
  • l.Sprue
  • m.Outer gate
  • n.Core vent
  • o.Vent

There is an air outlet at the highest point of the cavity, and there are vent holes pierced by a vent needle in the sand mold above the cavity to discharge the gas generated in the cavity, the sand mold and the core. Through the air outlet, you can also observe whether the molten metal has filled the cavity.

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