Product category:
Metals processing plant and equipment
News Release from: Topcast Engineering | Subject: Centrifugal vacuum casting machines
Edited by the Manufacturingtalk Editorial
Team on 27 February 2008
Centrifugal vacuum machines cast
titanium alloys
Centrifugal vacuum casting machines produce precision casting of most of the common titanium alloys using the lost-wax investment casting system.
Centrifugal vacuum casting machines are especially suited to produce precision casting of titanium alloys using the lost-wax investment casting system, said Topcast Enginering The casting cycle is as follows
This article was originally published on Manufacturingtalk on 14 Oct 2003 at 8.00am (UK)
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Precious metals systems include rapid prototyping
Topcast Engineering develops and manufactures machines and automation for precious metals application, like jewellery making gold refining, gold plating and rapid prototyping.
Vacuum caster has ultra-fast casting speed
Following suggestions from users, a vacuum casting machine offers new features for casting a wide range of metal alloys based on gold, silver, brass, bronze, aluminium, tin and other metals.
* It begins with oxygen removal from the melting chamber.
* Alloy melting under protective gas or high vacuum.
* Casting into the flask by centrifugal force.
After the casting and during the solidification phase a strong compression takes place in the mould.
A medium frequency induction heating generator guarantees a fast and homogeneous mixing of the alloy before casting while temperature measurement is achieved using an accurate infrared optical pyrometer.
Higher induction power density is used in class A machines when compared with class B.
The arm of the centrifuge may be entire or broken.
The latter one has the advantage to have the casting direction always in axis with the flask.
A brushless motor with low inertia rotates the arm, achieving high initial acceleration.
The speed profile is programmable to control the injection rate and the following compression.
The melting crucible is made in stabilised ceramic material with very low Ti reaction, while a pneumatic lift moves up and down the coil around it for heating or rotating.
A powerful vacuum pump system, with a mixed combination of mechanical, roots or diffusion pump, guarantees fast casting cycles and high level of vacuum, said Topcast.
Operator panel is simple and intuitive and, for the control of the casting process, only one pushbutton is needed.
To edit casting programs and monitor the process, a Touch-Screen with Synoptic Display is provided.
The machine is supplied already set and ready to be used for the most common alloys.
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