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Ram Extruder


Introduction
A ram extruder is an extruder where, instead of extrusion screw, a ram or plunger is used . The ram extruder was the earliest extruder to be used in the plastics industry. This typical process is applied for producing profiles, sleeves, rod, block, tubing, lining sheet bars, etc. The ram extrusion process is very effective for specific materials like PTFE which are not extruded successfully using screw extruder.
Ram Extruder
Process
In this process plastic material in powder form is gravity fed into a chamber. In the extrudating chamber the resin powder is heated on sintering temperature. Ultra high molecular weight polyethylene, becomes gelatinous as it melts so it can be extruded with this type of processes. A hydraulic ram pushes the resin materials like PTFE, UHMW, etc. from the chamber to the die. The die actually gives the shape of the desired plastic like a rod, tube or a profile shape with the requisite internal or outer diameter. When the material comes out of the die, it moves the length of the conveyor. The profiles can be manufactured endlessly and cut by the continuous extruding of each length.

Types of Machines
There are two types of ram extrusions- the vertical ram extrusion and the horizontal ram extrusion. Whatever be the type of ram extrusion, the resin feed, compaction or performing, sintering and cooling are all the same. But the extrudates quality depends on various parameter like the design of the extruder, powder properties, extrusion rate, pressure and temperature.

Nowadays, high quality mechanically engineered extrusion machines are available in the market that are highly innovative in its application. Fully automated systems are also available. Advanced range of machines ensures precision both in the pressing procedure and in the sinter zone. By adjusting the pressure and speed of the ram extruder every individual profile can be extruded perfectly. Also, temperature controls are also provided.
Extrusion Process
Hot Extrusion
Cold Extrusion
Warm Extrusion
Direct Extrusion And Indirect     Extrusion
Hydrostatic Extrusion
 
Extrusion Materials
Metal
Plastic, Ceramic, And Drug Carriers
Food
Polymeric Materials
 
Plastic Extrusion
Sheet / Film Extrusion
Blown Film Extrusion (Film Blowing)
Overjacketing And Tubing Extrusion
Co-extrusion
Extrusion Coating
Compound Extrusions And Foam      Extrusion
Profile Extrusion
Pultrusion
Crosshead Extrusion Process
    (Wire & Cable Coating)
Monofilament Fiber Extrusion
Extrusion Reprocessing
 
Plastic Extrusion Machines
Film Plant
Mono Layer Blown Film Plant
Extrusion Coating Lamination Plant
Box Strapping Line
Synthetic String Plant
Monofilaments Plant
Power Transmission Equipment
Forming Internal Cavities And      Drives
 
Types Of Plastic Extruders
Basic Extruder Machine
Single Screw Extruder
Twin Screw Extruder
Ram Extruder
 
Drives And Motors
AC Drives and Motors
DC Drives and Motors
Hydraulic Power Drives and Motors
 
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