T. M. A. International T. M. A. InternationalT. M. A. International
T. M. A. International
T. M. A. International
T. M. A. InternationalT. M. A. International
T. M. A. International
T. M. A. International T. M. A. International T. M. A. International T. M. A. International T. M. A. International



Investment Castings
Manufacturer and exporter of Investment Castings, Precision Investment Castings by 'LOST WAX PROCESS' up to a single piece weight of 20 kgs in a variety of Materials - Steels ( Stainless Steel, Heat Resistant, Corrosion Resistant, Tool Steel & even High Speed Steel ), Brass, Bronze & Aluminium Alloys.

Process
The main stages of the Lost wax Process are the following...
  • Precision Die Development as per Customer drawing & Foundry practise in a Tool Room
  • Injection of wax into the dies.
  • Assembling of patterns onto a casting unit (Tree)
  • Covering of trees with refractory material ( Shelling)
  • Dewaxing of Ceramic Shells
  • Sintering of shells
  • Pouring the required Metal ino shells.
  • Removal of Ceramic, cut-off, grinding of ingates, sand blasting, heat treatment.
  • Surface treatments like pickling, passivating, mechanical & electro polishing, hot dip galvanising etc.
  • Final Inspection
  • Packing & Despatch.
T M A International
Stages Of Investment Casting Process

Application
Investment Casting process is accepted worldwide as one of the most efficient & economical manufacturing technology for precision & intricately shaped parts. It has a lot of advantages viz.
Intricacy Shapes Any Intricate shape can be cast eliminating the necessity for machining of fabricating from assembly of different components.
Dimensional Accuracy Parts can be cast to very close tolerances which eliminates most of the machining and this gives it an enormous advantage over Sand Castings & Forgings.
Superior Surface Finish Eliminates or minimises need for Finishing operations.
Closer Control of Metallurgical Characteristics & wider range of Alloys- Ferrous & Non-Ferrous Ensures desired chemical composition & Mechanical properties & wide range of Alloys like Ferrous & Non-Ferrous.
Faster & cheaper development of new components This is ensured by inhouse Tool Room facilities & soft Metal Die Technology.
Batch Sizes Parts can be produced in exact replicas in small or large economic batch sizes.


Automobile Defence Nuclear Engineering
Instrumentation Pumps & Valves Dairy Machinery
Artificial Limbs & Body Implants Food Processing Chemical & Petrochemicals
Packing Equipments    


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Centrifugal Castings
Flanged Casting: Centrifugally cast sleeve with flanged end in CH20 Grade

Centrifugally Cast Ball Castings from 2" to 8" size in CF8M, CF3M, CF8 Valve Seat Rings in CA15M, ranging from 2" to 14" Ring Castings for RTJ Gaskets size ranging from 2" od to 18" od in SS 316, 316L, 304, 304L, 321,347, 205, 904L, IN 625,825,800, Monel 400
T. M. A. International T. M. A. International T. M. A. International


Ring castings proof machined in various sizes and grades
T. M. A. International


We specialize in centrifugal casting if all grades in grey cast iron, spheroidal iron, chilled cast iron & Ni-Hard. All castings & cylinder liners are produced as per specific requirements to suit particular applications of the end users.

Applications
Pressure Rolls of Corrugated Paper Board Ni-Hard Castings Cylinder Liners
All Other Castings    


Manufacturing Range
Diameter : Up to 32 inches or 810 mm
Length : Up to 72 inches or 1800 mm

Material Specifications Process Hardness
Grey Cast Iron Centrifugal Spun Cast 150 - 300 HB
Chilled Cast Iron Centrifugal Spun Cast 450 - 550 HB
Ni-Hard Centrifugal Spun Cast 500 - 650 HB
Spheroidal Cast Iron Centrifugal Spun Cast 180 - 350 HB


Non - Ferrous Centrifugal Castings (Up To The Single Weight Casting Of 1500 Kgs)
We also undertake Sand Casting & Chill Casting. We are specialised in producing casting in various grades copper based Alloys like :
Tin Bronzes Aluminium Bronzes Manganise Bronzes
Nickel Bronzes Leaded Tin Bronze Gun Metal

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¤ PRODUCTS RANGE ¤
Grey Iron Casting   |  Ductile Iron Castings
Investment Castings   |  Centrifugal Castings  |  Aluminium Pressure Diecasting