Round Dish-shaped Compression Mold

Round dish-shaped compression mold produces shallow circular FRP or composite parts such as trays, plates, lids, and dished heads. The die features a large circular concave cavity with a central drain hole, machined into a thick steel ring.

Die Design

The cavity is a shallow circular dish with a central opening for the ejector pin or drain. The die is built as a thick steel ring for rigidity, with heating channels around the perimeter. The upper punch matches the dish curvature to form a uniform wall section. Flash grooves around the cavity remove excess material.

Key Features

• Large diameter circular cavity, up to 1 m or more.

• Central ejector for clean part removal.

• Perimeter heating for uniform cure.

• Polished dish surface for glossy parts.

• Heavy steel construction to withstand press tonnage.

Applications

Round dish molds produce storage tank lids, dished heads for pressure vessels, cable junction box covers, agricultural trays, and shallow bowl components. The central hole in the die accommodates a nozzle, drain, or fitting in the finished part.

Process Notes

Material flow in shallow dish molds is more uniform than in deep draws, but flash control is important. A well-designed flash groove ensures that excess resin escapes without creating heavy flash on the part edge.

Conclusion

The round dish-shaped compression mold is a versatile tool for circular FRP covers and trays. The central hole accommodates fittings, and the polished cavity produces clean, glossy parts.