Resources Contact Us Home
Die for molding honeycomb structure and manufacturing method thereof

Image Number 3 for United States Patent #7670644.

A die for extrusion-forming a honeycomb structure which includes: a die base provided with ceramic puddle introducing holes and slits in communication with the ceramic puddle introducing holes; and a substrate layer, which roughly defines the final width of the slits, and a surface layer, which precisely defines the final width of the slits, formed on the die base in this order so that the final width of the slits becomes 15 to 200 .mu.m, wherein the surface layer is made up of tungsten carbide particles which are 5 .mu.m or less in average particle diameter and contain W.sub.3C as a main ingredient. According to this invention, there is provided a die for extrusion-forming a honeycomb structure which can restrain fluctuation in extrusion-forming speed among its parts and resistance to pushing force, both caused at the time of extrusion-forming, to be very small and is superior in productivity and durability.

  Recently Added Patents
Semiconductor power amplifier
Direct converting apparatus, method for controlling the same, and control signal generation device
Manufacturing method power semiconductor device
Washing machine
Acoustic measuring instrument
Method of producing probabilities of being a template shape
  Randomly Featured Patents
Non-woven web containing antimicrobial siloxane quaternary ammonium salts
Method for producing the DdeI restriction endonuclease and methylase
Optical waveform for use in a DWDM optical network and systems for generating and processing same
De-foaming spray dried catalyst slurries
Air refractometer
Visor mirror with notepad and pen
Method and apparatus for the measurement of hardness testing indentations
Anti-reflective coating forming composition for lithography containing polymer having ethylenedicarbonyl structure
Tuning device
Wind turbine