公开(公告)号：JPH10119019A

公开(公告)日：1998-05-12

申请号：JP15647197

申请日：1997-06-13

Applicant: CORNING INC

Inventor： DUNN RODNEY G ,  TREACY DAVID R ,  ZAK MICHAEL E

IPC: B28B3/22 ,  B01F5/06 ,  B28B3/20 ,  B28B3/26 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70

Abstract: PROBLEM TO BE SOLVED: To improve the homogeneity of the temperature and the uniformity of the viscosity in a plasticized powder batch material by a method wherein an extruder, which locates in the upstream of an extruding die and is equipped with an improved flow homogenizer, is used. SOLUTION: An extruder 10 has two extruding screws 12, which are arranged in a barrel 14 and driven by means of a motor installed at the inlet end part of the barrel 14. On the barrel 14, an inlet 18, through which a batch material mixed and plasticized in the extruder is introduced, is provided. A flow reversing homogenizer 20 locating in the downstream of a screw 12 portion is included in a cartridge 22 mounted at the outlet end part of the barrel 14 of the extruder. Further, a sieve 24 and a sieve supporting plate 26 locates in the cartridge 22 at the front or upstream of the homogenizer 20 with regard to the flow direction of the batch material. A honeycomb extruding die 28 is mounted downstream of the flow reversing homogenizer 20 positioned at the outlet end part of the cartridge 22.

公开(公告)号：AT251602T

公开(公告)日：2003-10-15

申请号：AT98935971

申请日：1998-07-23

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  FISCHER MICHAEL ,  MALARKEY CHRISTOPHER J ,  MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL E

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20 % higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.

公开(公告)号：AU2479097A

公开(公告)日：1998-01-08

申请号：AU2479097

申请日：1997-06-10

Applicant: CORNING INC

Inventor： DUNN RODNEY G ,  TREACY DAVID R ,  ZAK MICHAEL E

IPC: B28B3/22 ,  B01F5/06 ,  B28B3/20 ,  B28B3/26 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70

Abstract: A method and apparatus for homogenizing a flow stream of plasticized material supplied from an extruder (10), to reduce viscosity gradients causing defects in extruded products, wherein a flow inverting homogenizer (10) positioned in the flow stream and incorporating a plurality of criss-crossing channels (31,32) for simultaneously transferring portions of the flow stream from central to peripheral flow stream locations and other portions of the flow stream from peripheral to central flow stream locations.

公开(公告)号：AU8510798A

公开(公告)日：1999-03-01

申请号：AU8510798

申请日：1998-07-23

Applicant: CORNING INC

Inventor： CHALASANI DEVI ,  FISCHER MICHAEL ,  MALARKEY CHRISTOPHER J ,  MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL E

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20 % higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.

公开(公告)号：CA2291165A1

公开(公告)日：1999-02-18

申请号：CA2291165

申请日：1998-07-23

Applicant: CORNING INC

Inventor： MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL E ,  CHALASANI DEVI ,  FISCHER MICHAEL ,  MALARKEY CHRISTOPHER J

IPC: B28B3/20 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20 % higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.

公开(公告)号：ZA975248B

公开(公告)日：1998-01-05

申请号：ZA975248

申请日：1997-06-13

Applicant: CORNING INC

Inventor： DUNN RODNEY G ,  TREACY DAVID R ,  ZAK MICHAEL E

IPC: B01F5/06 ,  B28B3/20 ,  B28B3/26 ,  B28B3/22 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70 ,  B28B ,  B29C ,  B30B

Abstract: A method and apparatus for homogenizing a flow stream of plasticized material supplied from an extruder (10), to reduce viscosity gradients causing defects in extruded products, wherein a flow inverting homogenizer (10) positioned in the flow stream and incorporating a plurality of criss-crossing channels (31,32) for simultaneously transferring portions of the flow stream from central to peripheral flow stream locations and other portions of the flow stream from peripheral to central flow stream locations.

公开(公告)号：AT232512T

公开(公告)日：2003-02-15

申请号：AT98938324

申请日：1998-08-05

Applicant: CORNING INC

Inventor： BOOKBINDER ANDREA W ,  CHALASANI DEVI ,  DILLON GREGORY P ,  MCCARTHY KEVIN R ,  STUTTS BRIAN E ,  ZAK MICHAEL E

IPC: B28B3/20 ,  B28C7/00 ,  C04B35/195 ,  C04B35/622 ,  C04B35/632 ,  C04B35/636 ,  C04B38/00

Abstract: A method for forming and shaping powder mixtures involves compounding, homogenizing, and plasticizing components to form a mixture. The components are powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The components are chosen to result in improved wet green strength in the subsequently formed green body. The compounding is done by the steps of dry-mixing the powder material, surfactant and binder to form a uniform blend, adding the solvent to the resulting dry blend, and thereafter adding the non-solvent to the blend. The mixture is shaped by passing it through a low to moderate shear extruder, and then through a die to form a green body. The compounding and shaping steps are carried out at a temperature of no greater than ambient temperature. The method is especially suitable for RAM extrusion. Among the advantages, the method results in higher extrusion velocity, throughputs, and wet green strength, without increasing pressures and torques.

公开(公告)号：MX9704561A

公开(公告)日：1998-05-31

申请号：MX9704561

申请日：1997-06-17

Applicant: CORNING INC

Inventor： DUNN RODNEY G ,  TREACY DAVID R ,  ZAK MICHAEL E

IPC: B01F5/06 ,  B28B3/22 ,  B28B3/20 ,  B28B3/26 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70 ,  B28D01/00

Abstract: Un método y aparato para homogenizar una corriente de flujo de material plastificado suministrado por un extrusor, para reducir los gradientes de viscosidad que provocan defectos en los productos extruidos, en donde un homogeneizador de inversion de flujo colocado en la corriente de flujo y que incorpora una pluralidad de canales de entrelazamiento para transferir simultáneamente las porciones de la corriente de flujo de las ubicaciones de la corriente de flujo centrales a las periféricas y otras porciones de la corriente de flujo de las ubicaciones de la corriente de flujo periféricas a las centrales.

公开(公告)号：ID17375A

公开(公告)日：1997-12-24

申请号：ID972068

申请日：1997-06-17

Applicant: CORNING INC

Inventor： DUNN RODNEY G ,  TREACY DAVID R ,  ZAK MICHAEL E

IPC: B01F5/06 ,  B28B3/22 ,  B28B3/20 ,  B28B3/26 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70

Abstract: A method and apparatus for homogenizing a flow stream of plasticized material supplied from an extruder (10), to reduce viscosity gradients causing defects in extruded products, wherein a flow inverting homogenizer (10) positioned in the flow stream and incorporating a plurality of criss-crossing channels (31,32) for simultaneously transferring portions of the flow stream from central to peripheral flow stream locations and other portions of the flow stream from peripheral to central flow stream locations.

公开(公告)号：CA2206036A1

公开(公告)日：1997-12-17

申请号：CA2206036

申请日：1997-05-23

Applicant: CORNING INC

Inventor： ZAK MICHAEL E ,  TREACY DAVID R ,  DUNN RODNEY G

IPC: B28B3/22 ,  B01F5/06 ,  B28B3/20 ,  B28B3/26 ,  B28C1/16 ,  B29C47/36 ,  B29C47/70

Abstract: A method and apparatus for homogenizing a flow stream of plasticized material supplied from an extruder, to reduce viscosity gradients causing defects in extr uded products, wherein a flow inverting homogenizer positioned in the flow stream and incorporating a plurality of criss-crossing channels for simultaneously transfer ring portions of the flow stream from central to peripheral flow stream locations and other portions of the flow stream from peripheral to central flow stream locations.