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
Buffer pool extension for database server
Onium salt-containing polymer
Method and system for migrating object update messages through synchronous data propagation
Magnetic recording medium, information storage device, and method of manufacturing magnetic recording medium
Front face of vehicle wheel
Remotely provisioned wireless proxy
Scanned image projection system employing intermediate image plane
  Randomly Featured Patents
Impatiens plant--Aztec
Mobile multi-display billboard vehicle
Retractor device for cervical spinal fusion
Vent for septic system
Electroplating method for depositing continuous thin layers of indium or gallium rich materials
Luminaires for artificial lighting
Semiconductor memory including bit line reset circuitry and a pulse generator having output delay time dependent on type of transition in an input signal
Partially filling copper seed layer
Mouse shaped glass
Inverter or converter by current injection, provided with a circuit whose generating frequency for the alternating voltage is adjusted by the load's resonant frequency, cycle to cycle, without