WO2003002303A1 - Nozzle for treatment of surfaces with cryogenic particles - Google Patents

Nozzle for treatment of surfaces with cryogenic particles Download PDF

Info

Publication number
WO2003002303A1
WO2003002303A1 PCT/NL2002/000363 NL0200363W WO03002303A1 WO 2003002303 A1 WO2003002303 A1 WO 2003002303A1 NL 0200363 W NL0200363 W NL 0200363W WO 03002303 A1 WO03002303 A1 WO 03002303A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
length
diameter
throat
over
Prior art date
Application number
PCT/NL2002/000363
Other languages
French (fr)
Inventor
Huibert Konings
Simon Adrianus Antonius Van Steen
Original Assignee
Huibert Konings
Van Steen Simon Adrianus Anton
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huibert Konings, Van Steen Simon Adrianus Anton filed Critical Huibert Konings
Publication of WO2003002303A1 publication Critical patent/WO2003002303A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor

Definitions

  • Nozzle for treating surfaces with cryogenic particles is
  • the invention relates a nozzle for treating on surfaces with cryogenic particles.
  • Nozzles for cryogenic particles pose many problems as the channel has a temperature of minus 80 °C while the outer surface has a temperature of 20 °C.
  • Materials which are flexible like polypropylene or silicone rubber or nitrile rubber wear out fast and become unreliable because they can perish unexpectedly and thus cause danger to the operator.Metal is not feasible for the high conduction of heat causing too much sublimation and the formation of ice will obstruct the treatment .
  • the nozzle comprises a cylindrical element with on the inside a channel that is cylindrical, conical narrowing, conical expanding and finally cylindrical successively.
  • the nozzle may be mounted in a holder for the operator.
  • Nozzle (1) comprises a channel (3) that extends over the full length.
  • Length (5) is about 1.5 times the diameter of cylindrical part (4).
  • Length (7) is about 3 times the diameter of cylindrical part (4).
  • Length (10) is between 25 and 66 times the diameter of the diameter of throat (8).
  • Length (12) is equal to length (50.
  • throat (8) is proportional to the area of cylindrical part (11) as 1 : 2 to 1 : 3.
  • Cylinder (11) has a diameter of 20 mm and a length (12) of 50 mm.
  • the material is EPDM rubber with a Shore D hardness of 60 to 70 degrees.
  • the diameter of the throat may vary from 6 to 16 mm and the diameter of cylinder (11) can vary from 9 to 27 mm.

Abstract

The invention relates to a nozzle (1) for treating surfaces with cryogenic particles. The nozzle (1) comprises a cylindrical element provided on the inside with a channel (3) that is cylindrical (4), conical narrowing (6), conical expanding (9) and finally cylindrical successively (11). The nozzle (1) may be mounted in a holder for the operator. The nozzle (1) is produced from modified EPDM rubber and has a Shore D hardness between 60 to 70 degrees. The material is flexible and can be bent for treatment in difficult places.

Description

Nozzle for treating surfaces with cryogenic particles.
The invention relates a nozzle for treating on surfaces with cryogenic particles. Nozzles for cryogenic particles pose many problems as the channel has a temperature of minus 80 °C while the outer surface has a temperature of 20 °C. Materials which are flexible like polypropylene or silicone rubber or nitrile rubber wear out fast and become unreliable because they can perish unexpectedly and thus cause danger to the operator.Metal is not feasible for the high conduction of heat causing too much sublimation and the formation of ice will obstruct the treatment .
It has now been found that a rubber polymer of the type EPDM (ethylene propylene du rubber) with a Shore D hardness between 60 to 70 degrees is sufficiently flexible and is hardly subject to wear at temperatures of -80° C. An additional advantage is that the nozzle remains flexible so that the nozzle can be bent to get to difficult accessible places. At the same time the isolation is such that icing does not occur.
The nozzle comprises a cylindrical element with on the inside a channel that is cylindrical, conical narrowing, conical expanding and finally cylindrical successively. The nozzle may be mounted in a holder for the operator.
The invention is elucidated on the hand of Fig. 1.
In Fig. 1 the nozzle is indicated with (1). At (2) is the particles are supplied by means of with the help of compressed air. Nozzle (1) comprises a channel (3) that extends over the full length. A cylindrical part (4) with a length of (5) which functions as connection part, extends from supply opening (2) . From cylindrical part (4) the channel narrows conically (6) over a length of (7) to throat (8). From throat (8) channel (3) expands conically (9) over a length of (10). Next is channel (3) is cylindrical (11) over a length of (12).
Length (5) is about 1.5 times the diameter of cylindrical part (4).
Length (7) is about 3 times the diameter of cylindrical part (4). Length (10) is between 25 and 66 times the diameter of the diameter of throat (8).
Length (12) is equal to length (50.
The area of throat (8) is proportional to the area of cylindrical part (11) as 1 : 2 to 1 : 3.
Example: The nozzle is 600 mm long and has a diameter of 40 mm. Cylinder (4) has a diameter of 30 mm with a length of 50 mm. Cone (6) narrows from a diameter of 30 mm to 12 mm over a length (7) of 100 mm The diameter of the throat is 12 mm. Cone (9) expands in diameter from 12 mm to 20 mm over a length of 400 mm.
Cylinder (11) has a diameter of 20 mm and a length (12) of 50 mm.
The material is EPDM rubber with a Shore D hardness of 60 to 70 degrees.
The diameter of the throat may vary from 6 to 16 mm and the diameter of cylinder (11) can vary from 9 to 27 mm.

Claims

Cjaims.
1. Nozzle for cryogenic particles characterised in that the nozzle comprises a channel with a boring which at the side of the supply (2) is cylindrically over a length of (5), next conically narrowing (6) over a length of (7) to a throat (8) and thereafter expands (9) over a length of (10) to a final diameter with cylindrical part (11) with length (12) where the ratio of the area of throat (8) to the area of the final diameter of cylinder (11) is between 1 : 2 and 1 : 3 and the length (10) of the expanding part (9) is between 25 and 66 times the diameter of throat (8).
2. Nozzle for cryogenic particles according to claim 1 characterised in that the material of the nozzle consists of EPDM-rubber (ethylene-propylene-polymer-du-rubber) with a shore D hardness between 60 and 70 degrees.
PCT/NL2002/000363 2001-06-13 2002-06-04 Nozzle for treatment of surfaces with cryogenic particles WO2003002303A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1018280 2001-06-13
NL1018280A NL1018280C2 (en) 2001-06-13 2001-06-13 Blast element for processing surfaces with cryogenic particles.

Publications (1)

Publication Number Publication Date
WO2003002303A1 true WO2003002303A1 (en) 2003-01-09

Family

ID=19773542

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2002/000363 WO2003002303A1 (en) 2001-06-13 2002-06-04 Nozzle for treatment of surfaces with cryogenic particles

Country Status (2)

Country Link
NL (1) NL1018280C2 (en)
WO (1) WO2003002303A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568442B1 (en) * 2004-02-25 2007-11-21 François Archer Process of peening and nozzle therefore
EP2343183A1 (en) 2010-01-07 2011-07-13 Armacell Enterprise GmbH Elastomeric low temperature insulation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200587A (en) * 1937-02-25 1940-05-14 Hydroblast Corp Method and apparatus for sand blasting
US3102368A (en) * 1962-06-07 1963-09-03 Leslie W Smith Abrasive spray gun
EP0288263A2 (en) * 1987-04-22 1988-10-26 The BOC Group, Inc. Apparatus and method for removing minute particles from a substrate
US5487695A (en) * 1992-10-08 1996-01-30 Church & Dwight Co., Inc. Blast nozzle combined with multiple tip water atomizer
US5545073A (en) * 1993-04-05 1996-08-13 Ford Motor Company Silicon micromachined CO2 cleaning nozzle and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200587A (en) * 1937-02-25 1940-05-14 Hydroblast Corp Method and apparatus for sand blasting
US3102368A (en) * 1962-06-07 1963-09-03 Leslie W Smith Abrasive spray gun
EP0288263A2 (en) * 1987-04-22 1988-10-26 The BOC Group, Inc. Apparatus and method for removing minute particles from a substrate
US5487695A (en) * 1992-10-08 1996-01-30 Church & Dwight Co., Inc. Blast nozzle combined with multiple tip water atomizer
US5545073A (en) * 1993-04-05 1996-08-13 Ford Motor Company Silicon micromachined CO2 cleaning nozzle and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568442B1 (en) * 2004-02-25 2007-11-21 François Archer Process of peening and nozzle therefore
EP2343183A1 (en) 2010-01-07 2011-07-13 Armacell Enterprise GmbH Elastomeric low temperature insulation
US8784962B2 (en) 2010-01-07 2014-07-22 Armacell Enterprise Gmbh Elastomeric low temperature insulation

Also Published As

Publication number Publication date
NL1018280C2 (en) 2002-12-16

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