Specialist manufacturer of high integrity aluminium sand castings for the military, aerospace, high-end engineering and off-highway sectors.
Customers include: BOC Edwards, BAE Systems, MSI Defence, VT Engine Controls, VA Tech Reyrolle, Perkins Engines, GEC Alstom, JCB and ThermoElectron.
Castings are designed to be machined on NC machines
Product Focus : |
Accurate, high integrity, pressure tight aluminium sand castings.
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Casting Size Range: |
Up to 1.6m x 0.5m x 0.3m (H)
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Minimum Wall : |
0.2M cube – 5mm possible, 6mm general
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Thickness : |
Larger castings – 6mm possible, 7mm general.
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Materials: |
LM6 and LM25 to BS1490 as standard. Full range of BS casting alloys available by arrangement.
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Casting Accuracy : |
ISO 8062 (BS6615), grade CT6/7
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Repetition : |
using the principle of 6-point fixed location.
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Economic Quantities : |
Usually in the range of 500pcs – 5000 pcs per year
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NDT : |
Full NDT is offered with die penetrant testing to EN1371 and
X-Ray analysis to ASTM E 155-79. |
Quality Accreditations: ISO9001 (BSI); CAA
Descriptive Foundry Practice
We use chemically bonded sand techniques in conjunction with Ciba-Geigy 219 tooling resin patterns to create exact, repeatable apertures for each casting. Metal flow rates are then calculated to give optimum mould filling with minimal turbulence. Feeders and chills are designed and positioned to achieve progressive solidification within the mould.
Gas porosity is kept to low limits by tight control over melting / pouring temperatures and an emphasis on metal cleanliness at all stages.
New oxides are minimised by the use of controlled mould filling techniques (de-pressurised systems) and good confluence venting, whilst old oxides and eroded sand from the mould entry are eliminated by the use of in-mould reticular filtration.
Continuous improvement programmes are employed across the foundry, isolating and eliminating variables from whatever quarter. |
