Mold Manufacturing

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Mold Manufacturing




Jumbosan has been involved in supplying bronze moulding components to the Glass Container Industry for over 20 years.  We ship our products to all corners of the earth and maintain an excellent reputation for quality, service and fast deliveries.   Based on our strict Quality Control system, Mould Shops around the world have faithfully used Jumbosan Bronze castings for Neck Rings, Bottle Moulds, Bottom Plates and Baffles.

Neck Rings

Our bronze neck rings are supplied in a variety of conditions:

  • As cast
  • As cast with a nickel insert
  • Semi-finish machined with or without a nickel insert – the mating faces and ends milled, and one or more of the bands turned.  Although typically held much tighter, our in-house machine shop works to a “half on half” tolerance of .002 (.05mm) and “shake” is held within .002 (.05mm).
  • Finish machined with or without a nickel insert– completely machined to your print and ready for production.

Guide Rings

When purchasing finished neck rings, the mating finished nickel guide ring is also available and will be shipped inside the neck ring thereby guaranteeing the perfect fit.

Bottle Moulds

Bottle Mould castings are supplied in the as cast condition and must be machined prior to production.  Whether your glass container is round, oval, or square – handle or no handle – Jumbosan Bronze has the technological know-how to provide the perfect casting.

Bottom Plates and Baffles

Also supplied in the as cast condition and must be machined prior to production.

All Jumbosan Bronze Glass Moulding Components are cast using strict quality control, designed to improve wear and corrosion resistance.



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