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
Devices and methods for the production of coaxial microfibers and nanofibers
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
System and method for optimizing use of plug-in air conditioners and portable heaters
Fast port switching in an audiovisual receiver by use of port pre-authentication by a partial PHY decoder core
Film-forming resins as a carrier for topical application of pharmacologically active agents
Factor IXa crystals, related complexes and methods
Elastic wave device having a capacitive electrode on the piezoelectric substrate
  Randomly Featured Patents
Method and system to provide objects, especially documents, multimedia objects, software applications and/or processes to users of a telecommunications network
Water resistant cemetitious materials
Functionalized porous substrate for binding chemical and biological moieties
Over-center hinge
Wear cap style excavating tooth
Method of fabricating flash memory
Inhaler apparatus with modified surfaces for enhanced release of dry powders
Method of controlling output power in a mobile radio communication system
Formulations and methods for reducing skin irritation
Circuit arrangement for forming the termination of an analogous subscriber line