Ntf (india) Private Limited

Manesar, Manesar, Haryana

Reaction Injection Moulding as the name suggests (RIM)is similar to injection moulding except that in RIM thermosetting polymers are in the liquid form and are used in place of thermoplastic, which get cured in the mould by virtue of a reaction which occurs between the ingredients injected.

In RIM process, the two halves of the mould, clamped to the press platens are first closed with the help of press and then highly reactive mixture of raw materials is injected in the mould under high pressure. Mixture is then given time enough to expand and cure to the shape of the mould.

Reaction injection moulding has many advantages over other processes. It produces light weight, flexible yet very high impact strength products with cycle times as low as 3-4 minutes. The ingredients used in RIM process has very low viscosities unlike molten thermoplastics and at par with water which makes it most suitable process for manufacture of large, light weight and thin walled products, of intricate shapes and profiles.

NTF has two types for RIM technologies:

• HS-RRIM High Speed Reinforced Reaction Injection Molding
• SRIM Structural reinforced reaction Injection molding

Production

The products manufactured under Reaction Injection Moulding are exterior body parts of a car such as:

• Front & Rear Bumpers
• Adaptors
• Side Skirts
• Rear Spoilers
• Fenders
• Wheel Arches
• Side Body Claddings
• Dashboard
• Grills
• Rear Spoilers
• Roof Ornaments
• Car Styling Kits
• Aero Parts
• Tractor Fenders
• Bonnet Bends
• Bus Parts Front and Rear Bumpers
• Truck Parts - Front and Rear Bumpers

For manufacture of parts the two halves of the mould are first applied with release agent and uniform gel-coat layer and then laid up with special glass mat known as CFM or core mat. The two halves of mould are then closed with toggle clamps and vacuum applied to the mould with inbuilt vacuum minder. Resin is then forced into it with the help of a quick, semi-automated process. Once the requisite amount of resin is injected the mould is left for curing of the part for 30-45 minutes.

Benefits of RTM:

• Requires minimum labour
• Minimum wastage
• Complete defense against air entering into the parts
• Controlled and uniform thickness
• Higher stiffness to weight ratio

At NTF we use RTM technology to develop superior quality and durable products. In the production process we useThermo set Reinforced as the raw material to produce:

• Hard Tops
• Spinners
• Doors for Train
• Roof (AC)
• Panels
• Cover - army boxes
• Dash Boards
• Consoles

Most of the auto interiors are moulded by this process in NTF. Thermoplastic in the form of extruded sheet is first heated to its melt flow index temperature by passing through an infra-red oven and then placed through conveyor on mould cavity at room temperature and already clamped on the bottom platen of the press while the decorative fabric woven or non-woven, vinyl sheet etc. are pre fixed on core clamped on top platen of the press.The press is closed under constant pressure for a predetermined time when the part takes its shape with top fabric duly bonded with it. We have four thermo-compression lines in our two units for serving our automotive OEM customers.

Production

After selecting the appropriate material for the production process we move forward with the manufacturing wherein following products are manufactured:

• Rear Parcel Shelf
• Ornaments for Door Trim
• Complete Door Trims
• A / B / C Pillar Cover
• Trunk Liner
• Battery Cover

NTF is introducing a new technology LWRT (Light Weight Reinforced Thermoplastic) to produce similar products with light weight and added strength.