A D Krušik – Precision Casting Mionica. . Why precision casting?. Most demanding/sophisticated internal and external configurations Unsurpassed flexibility for construction Narrow dimensional tolerance Very compact and homogeneous structure Very good mechanical characteristics
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Proizvodni center Koper, Koper
LIVARNA VUZENICA, d.o.o. , Vuzenica
Proizvodni center Senožeče, Senožeče
CIMOS TAM Ai, d.o.o., Maribor
TPS, d.o.o., Novi Kneževac
CIMOS TITAN, d.o.o., Kamnik
LIVNICA KIKINDA Ai, d.o.o., Kikinda
LIVNICA KIKINDA A.D., d.o.o., Kikinda
LIRA, d.o.o., Kikinda
LETANA, d.o.o., Ljubljana
FAM SEČANJ Ai, d.o.o., Sečanj
LIP, d.o.o., Ljubljana
LITOSTROJ E.I., d.o.o., Ljubljana
LITOSTROJ ENERGIJA, d.o.o., Ljubljana
LABINPROGRES TPS, d.o.o., Labin
P.P.C. BUZET, d.o.o.
Proizvodni center Roč, Roč
P.P.C. BUZET, d.o.o.
Proizvodni center Buzet, Buzet
KRUŠIK – PRECIZNI LIV, d.o.o., Mionica
NT FORGING, d.o.o., Novi travnik
CIMOS TMD CASTING, d.o.o., Zenica
CIMOS TMD Ai, d.o.o., Gradačac
CIMOS SREBRENICA, d.o.o., SrebrenicaBA)
Cimos Group - Geographic location
1. WAX INJECTION
Modelling is done by a wax pattern (replica) of the casting to be manufactured.
These replicas are called patterns (\'models\').
Patterns are put on the central wax runner bar to
form an assembly of castings referred to as a \'tree\'.
3. BUILDING THE SHELL
The shell is built by dipping the assembly (tree) into a ceramic slurry, and then
into a bath of very fine sand. During this procedure, up to eight coats may be built.
4. WAX REMOVAL
As soon as the ceramic dries, the wax can be removed by firing, whereby a negativemold of the tree within the shell is made.
5. CONVENTIONAL CASTING
In a conventional process, the molten metal is poured into the shell by way of gravitycasting. When the metal cools down, the parts and castings, the runner bar and the side cup aremerged into one fixtured (gate) casting.
6. BREAKING-OFF THE SHELL
When the metal cools down and hardens, the ceramic shell is broken off by vibration or water jet.
7. DEGATE GRINDING
Parts are cut off from the central runner bar by friction saw or water
8. FINISHED CASTINGS
After minor working operations (finishing), the metal castings identical to the original waxpatterns are ready to ship to the customer.
This technology allows to manufacture large batches of castings of a very complex forms which can hardly (or impossible) be obtained by conventional process or by machining.
Thanks to the characteristics of ceramic material and working techniques, it is possible to reproduce fine details, achieve great dimension precision and the quality of surface that cannot be obtained by other casting procedures or in any other way.
By applying ceramic and degradable cores and a combination thereof we can produce castings of most sophisticated forms (curved blind slots/holes, threads, narrow grooves, etc.)
Using the hollow runner bar, we achieve an optimal layout of patterns which in addition to other advantages, provides equal terms for all the castings and thereby equal characteristics.
Combining and gluing several wax or plastic patterns, we can obtain very complex parts and reduce the cost of working and control. Castings so manufactured require little machining, or none at all.
Pouring the metal into shells heated at 1050°C allows for an even crystallization and as a result, a homogeneous and compact structure that guarantees a high level of mechanical characteristics.
Thanks to casting in heated shells and vacuum chambers we obtain castings with very thin walls - 1mm.
Precision casting further allows you to eliminate or reduce the costs for equipment that would be indispensable if you were casting in the conventional way.
Our chemical and metrology lab, with rich and modern equipment, provides for a comprehensive and complete control of castings in terms of chemical composition, homogeneous structure, mechanical characteristics and dimension precision.
These analyses are made by spectro-equipment, X-ray, MAGNAFLUX, penetrants, optical microscope, optical comparators and other indispensible equipment and measuring appliances.