CROWN Single Screw Extruders
In single screw extruders, a screw mixer melts the entering plastic materials, pushes the material through the extruder, and forms the plastic into the desired shape.
Extruders have three key components:
- The hopper, where material is fed to the extruder.
- The screw, which runs along the length of the machine.
- The optional static mixers at the end.
Single screw extruders rely on the friction between the material and the barrel for flow: the greater the friction, the slower the flow. One way to increase friction is to increase the length of the barrel, but this could result in a change in viscosity with position. The extruder temperature can be adjusted to control the viscosity.
Advantages are that single screw extruders are generally less expensive than twin screw extruders, there is less shear, high throughput, and they can handle a wide variety of materials (although advances in twin screws have heavily narrowed this gap).
Disadvantages are that they are poor at mixing compared to the twin screw, and they rely upon the physical property of the material to drive the material through. Temperature regulation is also necessary.
For questions regarding your particular process please call or email us.
CROWN Single Screw Extruders are available in sizes ranging from 2.5" for our laboratory model up to 12" for super high capacity production lines, capable of producing upwards of 22,000 lbs. per hour depending on feedstock.
L/D ratios, Drive Motor size, and screw design are customized based on customer process and extrusion needs. Automatic closed loop liquid or cast aluminum finned air cooling with precision rate control. 200,000 to 1,000,000 BTU/HR capacity.
Various types of side feeder and venting system configurations are customized based on process requirements.
All CROWN Single Screw Extruders are equipped with an HMI/PLC touch screen control panel. Discreet instrumentation is also available by request.
4 bolt swing gate with threaded flange heater, optional c-clamp, hydraulic clamp - or other as required.
All backed by CROWN's warranty unmatched in the industry. See brochure or excel file specification sheet under the documentation tab for more detailed specifications.
|Single Screw Extruder||Single Screw Extruder brochure with detailed description and tables.||09/27/2013|
|Single Screw Extruder Spec Sheet||Detailed specifications for CROWN Single Screw Extruders||10/10/2013|