We, GNR Sinters LLP are manufacturers of sintered products. We possess the technological prowess to manufacture several ferrous and non-ferrous parts caterings to Automotive industry, Electrical industry, shock absorber parts and household equipments-sintered bronze/iron bushes (self-lubricated bushes) and sub-assemblies for refrigeration industry, compressors, etc.
We are a newly established firm, with an intent to aggressively place our product in the market. Our company has been established on core values of delivering consistency in quality and price competitiveness to our customers and in order to achieve the same we have procured the state of art machinery and adopted best quality control practices. Our technology partner is Fluidtherm Technologies Ltd, headed by Mr. Gopinath (President of Powder Metallurgy Association of India).
To be the one stop destination for manufacturing solutions.
The demand for Powder Metallurgy (PM) products has been growing due to many advantages powder metallurgy as a metal process offers. Due to enormous design flexibility, PM products can meet specific strength, tailored properties, design characteristics and operational advantages with a high degree of accuracy.
In addition, products with extremely close tolerance can be net-shape manufactured with virtually no waste and without extensive secondary machinery making PM efficient on a mass production basis. Most importantly, PM facilitates the manufacturing of parts or combination of parts that otherwise may be impossible or expensive to manufacture using conventional metal forming techniques.
The basic steps in the production of Sintered Powder Metal Components are:
1. Blending and mixing of metal powder
2. Pressing–Die compaction (green briquettes)
3. Pre-sintering and sintering
4. Repressing
5. Sizing
6. Oil impregnation
The metal powder of copper, tin and graphite is mixed in a pre-determined ratio and blended in a ball mill by using organic lubricants by few percentage in weight for easing the moulding operation. The blended metal powder mix is compacted by subjecting to die compaction press briquetting. Before sintering the green briquettes at 800°c in a mesh belt conveyor of continuous furnace, pre-sintering is carried out in the low temperature zone of the furnace at 440-450°C. The pre-sintering operation allows these powdered particles to liquify and completely diffused into copper. The entire sintering operation is done in a furnace under a protective atmosphere creating a high quality finished product, otherwise the bonding between particles will be affected by surface films such as oxides. For applications that require higher density or close dimensional tolerances, sintering is followed by a cold working operation known as Coining or repressing. In some cases, re-sintering after repressing will increase mechanical properties. Despite increase in strength, re-sintering may result in large grain size and loss of dimensions due to shrinkage and to rectify this, sizing is done. Special sizing process like powder compaction process and sizing dies gives the final dimensions. Finally, oil impregnation is done to fill the pores in the sintered parts by dipping them into hot non-gumming petroleum oil for 10–15 minutes at 110°C, complete impregnation which is done primarily to improve anti-friction properties. The final product, self-lubricating bushes are checked as per IS 3980 and packed for despatching.
Metal in powder form is costlier than in solid form. Further, expensive dies and equipment needed to adapt this process implies that the process is justified by the unusual properties obtained in the products. Powder metallurgy offers the following specific advantages.
1. Parts can be produced from high melting point refractory metals with respectively less difficulty and at less cost.
2. Production rates are high even for complex parts. This is primarily because of the use of automated equipment in the process.
3. Near net shape components are produced. The dimensional tolerances on components are mostly such that no further machining is needed. Scrap is almost negligible.
4. Parts can be made from a great variety of compositions. It is therefore much easy to have parts of desired mechanical and physical properties like density, hardness toughness, stiffness, damping, and specific electrical or magnetic properties.
5. Parts can be produced with impregnation and infiltration of other materials to obtain special characteristics needed for specific applications.
6. Skilled machinists are not needed, so labour cost is low.
7. Parts with controlled porosity can be produced.
8. Bi-metallic products, sintered carbides and porous bearings can be produced only by this process.
1.Material:
Bronze, D-Bronze, Iron, Copper-Iron Copper-Carbon Iron, Phosphorous Iron, nickel/copper/steel, add-mix, pre-alloyed copper infiltrated, bronze matrix, Harden Steel.
2.Technology:
• Parts up to 2-3 level complexity & length up to 75mm & Dia. up to 100 mm.
• Powder Compaction Press capacity: Up to 30 tons Fully Automated.
• Densities: to 7.5 grams/cc
• Sintering furnace: high temperature (1150°C)
• Copper Infiltration
• Tumbling and Deburring
• Oil Impregnation & Resin Impregnation
• All Secondary Machining Operations to achieve a final parameter.
Our capabilities include high density, high strength, High performance, High precision bushes, parts, Gears & Gearmotors by combining high strength alloys and unique secondary operation.
Our complete powdered metal facilities enable us to execute conventional PM and secondary operations in-house, taking high-volume powdered metal components to new standards of excellence.
Our professionals select the industry demands components with minimum weight and optimum performance requirements, proper materials & densities and our in-house technology ensures to give our customers greater quality and maintains cost-effective solutions.
| Product | Description |
|---|---|
| Bearings and Bushings | Self-lubricating sintered bearings can be cylindrical, flanged, or spherical. On special request, other shapes are possible, and even tolerances can be altered. Where lubricants are concerned, Depending upon application, bearings are impregnated with oils of varying viscosity. |
| Small Structural Components | |
| Automotive Components | Oil-pump Gerotors & gears, Refrigeration Parts, sprockets, synchronizing Rings & Hubs, components, sensor Ring transmission Parts, Timing belt pulleys & Gears, -Bearing Caps, Ridecontrol parts, Steering Column Parts, Shock Absorber Components, Valve-Train Parts like valve guide, valve seat, piston ring, fuel injection pump parts, Air conditioning Parts, Wiper Parts. |
| Two & Three Wheelers Components | Clutch Bush, Clutch PressurePlate, Clutch pivot, Engine Bush, Connecting Rod Bush, Pedal Bush, Speedometer Shaft Bush, Gear Box Bushes. |
| Electric and electronic equipment Spare Parts | Self starter & dynamo Bushes & Parts, Power Tools Parts. |
| Diesel Engine Parts | Camshaft Bush, Rocker Arm Shaft Bush, Governing Weight, etc. |
| Business Machine Parts | Fax, Printer, Type Writer, etc. |
| Industrial gears & sprockets | Textile Machinery Parts & Bushes |
| Home Appliance Components | Washing MIC, Mixer & Juicer, Refrigerator , A/C, Cooler, etc. |
Get in touch with us
Corporate Office:
2nd Floor, 6-2-982, Khairatabad,
Hyderabad, Telangana,
India - 500004
+919848312800
+919823083306
info@gnrsinters.com
