Page 56 - CM&DT

54 | PRODUCT INFORMATION www.mmcpublications.co.uk

package, vacuum pump systems, partial metal is very fast and accurate. production of quality castings. This
High pressure control, condensate trap, Standard geometries available are naturally occurring chrome ore under-
dewpoint measuring device, multi- 9/16mm, 12/22mm and 16/28mm, goes several intensive cleaning and
temperature
zone control and various heating ele- while lengths can be in the range screening processes to enhance
ments (graphite, Kanthal-Super and between 200mm and 1200mm. moulding and casting properties. It is
furnace
molybdenum), gas recooling, circulation Shorter tubes are available on request. available in various grades in quality
cooling unit and emergency water In case a protection tube longer than bags or bulk tanker.

supply, as well as a viscometer. 1200mm is required, Drache offers Compared to silica sand, the density
www.linn.de
special extensions made from steel. All of Hevi-Sand provides the mould or
tubes have a groove at the upper end core with a high rate of heat transfer,
of the tube. Corresponding connec- giving good chilling characteristics
Thermocouple
tions are also available. For the large and in some cases, eliminating the
protection thermocouple protection tube needformetalchills.Chipping,grind-
16/28mm, a fixed as well as a flexible
ing and overall cleaning costs can be
connection is possible.
significantly reduced, while minimal
tubes
www,drache-gmbh.de
binder requirements and excellent
permeability can reduce the incidence
Chromite media
of gas defects.
High thermal stability and heat

transfer in comparison to silica sands
make it the preferred aggregate for
large iron, steel, copper base and
high alloy castings. Hevi-Sand is also HT 1600 Special.

successful in reducing or eliminating Linn High Therm GmbH has intro-
penetration, burn-on and veining on duced the HT 1600 Special series of
Drache offers thermocouple protec- castings of this type. It is not easily high temperature furnaces up to
tion tubes made from silicon nitride. wetted by liquid metal, giving excellent 2100°C for universal heat treatment

This material is fully resistant to liquid refractory properties to mould and applications, graphitisation, sintering
aluminium, magnesium and zinc, thus core surfaces, while improving resis- and vacuum brazing. They feature a
no corrosive attack will appear. Con- AMCOL’s Hevi-Sand is available in various grades in tance to attack from metal oxides vacuum tight furnace chamber with
sequently, superior lifetimes of more quality bags or bulk tanker.
and slag and resulting in good peel rotary vane pump, roots pump

than one year can be achieved.
AMCOL’s Hevi-Sand is produced characteristics and a good surface fin- or turbo-molecular pump up to 5 x
Furthermore, silicon nitride provides from high-grade foundry chromite ish.
10-4 mbar.
high thermal conductivity, so tem- that has been specially treated for www.amcolmetalcastings.com
Options include H2 operation, a gas
perature measurement of the molten
use as a mould and core media in the
feeding and burn-off device, safety

International metal industry magazines,

maps and directories

Keeping you

informed of

the metals industry

To subscribe to our magazines and purchase our ferrous and non-ferrous industry maps and directories

please visit www.mmcpublications.co.uk or contact anne@mmcpublications.co.uk

Cast Metal & Diecasting Times January/February 2014