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
Control circuit and control method for dimming LED lighting circuit
Methods and systems for magnetic media servo writing
Interferometric technique for measuring patterned sapphire substrates
Capital allocation and risk management
Method for wastewater treatment and wastewater treatment system
Method and apparatus for measuring oxidation-reduction potential
Methods and materials for calibration of a reader
  Randomly Featured Patents
Airflow sensor
High penetration, high speed, agglomerated welding flux
Encoded stream generating apparatus and method, data transmission system and method, and editing system and method
Pressure transducer with piezoelectric crystal for harsh environment use
Bending and squeezing blade for sheet metal bending and squeezing machine and machine utilizing the aforesaid blade
Bucket having storage compartments for holding wet floor warning signs
Roll assembly for use in profiling film
Packaging container
Multiple orientation nanowires with gate stack sensors
Base for headset