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
Semiconductor device
Fluorine-free fused ring heteroaromatic photoacid generators and resist compositions containing the same
Dynamically updating privacy settings in a social network
Fire detector
Program recording medium, image processing apparatus, imaging apparatus, and image processing method
Plastic floor-wall transition methods, materials, and apparatus
Compact ion accelerator source
  Randomly Featured Patents
Molded article of pen tip of input pen for coordinate input apparatus, method of molding pen tip and mold therefor
Interactive and web-based Gantt Chart
Selection of snapshots of a medical image sequence
Ash silo fluidization cloth
Surface-wave passive sensor including an integrated antenna, and medical applications using such a type of passive sensor
Systems and methods for allocating an amount between transaction accounts
Cover assembly for rechargeable battery
High density phase-change type optical disk having a data efficiency of more than 80 percent
Thermoformed reclosable container