Resources Contact Us Home
Extruder die head

Image Number 5 for United States Patent #6533570.

An extruder die head, preferably a blown film head, comprises an internal cylindrical mandrel and a jacket, which envelops concentrically said mandrel. Between said mandrel and jacket an annular channel is formed that empties into a die slit. The invention also comprises at least one line, which empties into the annular channel in the area opposite the die slit and which feeds a melt. To prevent a slit between the central mandrel and the jacket, enclosing said mandrel, where the polymer melt could accumulate and deposit, the mandrel is made as one piece with a flange-shaped foot. The jacket rests with its bottom face sealingly on the annular surface of the flange-shaped foot and is connected, for example fastened, to the same. The annular channel extends from the peripheral surface of the mandrel to the flange-shaped foot up to and into the transition region. The line, feeding in a melt, empties into this transition region.

  Recently Added Patents
Flexible lighting devices
LCD television set capable of external connection with application processor
Behavioral fingerprint based authentication
Phosphonate compounds
Self assembly of elements for displays
Reliable and accurate usage detection of a software application
Data paths using a first signal to capture data and a second signal to output data and methods for providing data
  Randomly Featured Patents
Antenna arrangement
Virtual license documents
Method and system for incrementally moving teeth
Composition containing a tackifying resin and a combination of particular oils
Tracking and guidance system with modulated missile-mounted laser beacon
System and method for enhanced fraud detection in automated electronic credit card processing
Drain extended PMOS transistors and methods for making the same
Portable electronic device with protected built-in camera
Image sensor
Apparatus and method for completing and recompleting wells for production