WO1999005234A1 - Preparation de la surface des carrosseries de voiture et des pieces de carrosserie de voiture - Google Patents

Preparation de la surface des carrosseries de voiture et des pieces de carrosserie de voiture Download PDF

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Publication number
WO1999005234A1
WO1999005234A1 PCT/GB1998/002208 GB9802208W WO9905234A1 WO 1999005234 A1 WO1999005234 A1 WO 1999005234A1 GB 9802208 W GB9802208 W GB 9802208W WO 9905234 A1 WO9905234 A1 WO 9905234A1
Authority
WO
WIPO (PCT)
Prior art keywords
body part
composition
calcined
pumice
china clay
Prior art date
Application number
PCT/GB1998/002208
Other languages
English (en)
Inventor
Stephen Alan Jones
Andrew Paul Lawton
Original Assignee
Refinish Systems (Uk) Ltd.
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 Refinish Systems (Uk) Ltd. filed Critical Refinish Systems (Uk) Ltd.
Priority to AU84556/98A priority Critical patent/AU8455698A/en
Priority to GB0003995A priority patent/GB2343188A/en
Publication of WO1999005234A1 publication Critical patent/WO1999005234A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1454—Abrasive powders, suspensions and pastes for polishing

Definitions

  • This invention relates to a method of keying vehicle body parts and to a composition for use in carrying out this method.
  • this invention relates to a method of keying metal or plastic body parts of landborne vehicles and to a composition for use therein, however, the method and composition have uses in relation also to waterborne and airborne vehicles.
  • References to vehicles in this specification should be construed as references to landborne, waterborne or airborne vehicles unless the context suggests otherwise.
  • abrasive creams have the further disadvantage that they contain a relatively low percentage of abrasive component, thereby requiring considerable work to obtain the desired finish, with the associated loss of time in carrying out the task. Problems also occur wherein abrasive papers become clogged with particles of the body part or surface coating which is being keyed, hampering the operation.
  • the present invention provides a method of preparing a vehicle body part comprising the steps of:
  • the method of preparing the vehicle body part also includes the step of applying a surface coating to the keyed surface of the body part.
  • the surface coating may be a refinish primer, a base coat, a lacquer or a top coat.
  • the method may include the step of applying a polishing compound to the keyed surface of the body part and polishing the keyed surface to obtain a suitable finish.
  • the method may be used to provide a keyed surface upon an uncoated body part prior to applying a surface coating.
  • the method may be used to provide a keyed surface upon a body part which already has one or more surface coatings.
  • the abrasive powder is rubbed into the surface of the body part manually, utilising suitable applicator means.
  • the applicator means is a damp cloth.
  • the applicator means may be an electrical power tool.
  • the abrasive powder is removed by being wiped or blown off the surface of the body part.
  • it may be removed by being washed off the surface using a suitable liquid.
  • the present invention provides a composition in the form of a solid, granular abrasive for preparing a vehicle body part for the application of a surface coating or for the carrying out of a finishing process, the powder comprising pumice, calcined alumina and calcined china clay.
  • the pumice, calcined alumina and calcined china clay are mixed in an equal ratio by volume of %: %: 1 /3.
  • the ratio may be varied by increasing the amount of calcined china clay, keeping the ratio of pumice to calcite alumina constant.
  • the composition is prepared by mixing and sieving the three components, removing impurities.
  • the particle size of the finished product is preferably no greater than 300 micrometers. A particle size in excess of 300 micrometres may be utilised where a good surface finish is not required. The particle size may be determined by the grain size of the sieve used in the preparation of the composition.
  • composition contains the following compounds as a percentage of the total volume of the composition:
  • composition may vary depending upon the volume ratio of the pumice, calcite alumina and calcined china clay.
  • the present invention provides a method of preparing a vehicle body part prior to applying a surface coating to the body part or performing a finishing process upon the body part.
  • the method has applications both in preparing an uncoated body part for the application of one or more surface coatings and also in the application of a further surface coating or for performing a finishing process on a vehicle body part which has already had one or more surface coatings applied to it.
  • a further surface coating is typically required when a vehicle body part becomes scratched or otherwise damaged.
  • the surface is keyed by applying a small amount of the abrasive powder to the surface and either manually rubbing the powder across the surface area of the body part in a polishing motion, utilising a damp cloth, or by using an electrical power tool with a suitable head attachment.
  • a body part such as a door panel in a medium sized car.
  • Such an operation takes of the order of 45 seconds to carry out in a manual application, providing an evenly keyed surface to the body part.
  • the abrasive powder is then removed either by being simply wiped off or by being blown off using, for example, a supply of compressed gas.
  • the body part is now ready for a surface coating to be applied, the keying on the surface providing adhesion between the surface coating and the surface of the body part in question.
  • This has advantages as compared to the use of abrasive papers or shaped abrasive paper disks for use with orbital sanders, as in such methods, the paper often becomes clogged with residue, particularly when keying a body part which has had one or more surface coatings applied to it.
  • the method In applying the abrasive powder to a body part which has already had a surface coating applied, the method is similar. In the case where it is required to perform extensive repair such as in applying surface coatings to a replacement body part in an existing vehicle or in repairing major damage to a body part in such a vehicle, the method enables a good, matched surface finish to be obtained.
  • the traditional method of repair includes the practice of "blending", in which, following application of primer and base coat as necessary, the top surface coatings are applied not only to the replacement body part, but also to the neighbouring body parts.
  • the top coating is gradually faded across approximately half the width of the neighbouring parts, in an attempt to produce a colour and shade match.
  • a transparent lacquer coating is applied to the replacement panel and the neighbouring parts which have been blended in.
  • the disadvantages of the traditional method are that individual scratches produced by abrasive methods show through the lacquer as black lines, and an uneven key produces a shadow effect.
  • the method of the present invention provides a good surface finish with an even key and no such individual scratches , and furthermore does not require the "blending" process to be carried out.
  • the surface of the body part is keyed by applying the abrasive compound over the surface until an even key is obtained. Primers and base coats are applied as necessary, with the surface being keyed in a similar fashion between each coating. One or more top surface coatings are then applied, again keying as necessary.
  • the final coating has been applied, the surface of the coated body part and the neighbouring parts are keyed using the abrasive powder, to obtain an evenly keyed surface.
  • a good surface finish which matches the existing body parts is therefore obtained without the need for "blending".
  • the method includes the step of either applying a lacquer coating to the replacement body part and the existing body parts, or of applying a polishing compound and buffing the surface as necessary.
  • the method is similar in the case of repairing extensive damage to an existing body part, except that initial repair in the form of reshaping, sanding and filling may be necessary prior to applying a base coat, primer and top surface coatings.
  • the method further applies to repairing minor scratches to surface coatings on a body part by carrying out the steps of applying the abrasive powder, rubbing the powder into the surface until the scratch is removed and a keyed surface is obtained, removing the abrasive powder and either applying a polishing compound and polishing the surface coating using an electrical power tool with a buffing attachment, to return the surface coating to its original condition, or applying a clear lacquer coating to the keyed surface.
  • the method further applies to the repair of deep scratches or other such damage where the top surface colour coatings on a body part become damaged.
  • a "blow-in" repair is carried out, wherein a small area of a body part is repainted, avoiding the need for a costly, time consuming repair job wherein one or more.body parts are repainted and "blended".
  • the first step of the method in such a case is to sand the scratch and the area surrounding it along a narrow strip of approximately five centimetres in width.
  • a filler compound is applied if necessary after keying the sanded surface and subsequent base coats, primers and top surface coatings are applied as necessary, with the surface being keyed between each coating.
  • the top surface coatings overlap the area surrounding the scratch onto the originally coated body part, such that a matched finish can be obtained.
  • the scratched area and surrounding body part is keyed using the abrasive composition, and the finished, repaired surface is then lacquered or polished as appropriate. In this way, the finish on the repaired area is matched for colour and shade with the originally coated body part.
  • the method also permits a good, even key to be applied to the surface of a body part in and around difficult areas such as in door handle recesses, where it is normally difficult to apply a key using conventional methods.
  • the powder includes pumice, calcined alumina and MolochiteTM, ideally in an equal ratio of Va: %: h by volume.
  • the percentage of MolochiteTM in this composition may be increased, however it is necessary to keep the proportions of pumice to calcite alumina equal in order to obtain the best results and ensure that the composition is non-porous, this causing problems in removing the composition from the body part .
  • Molochite TM is obtainable from ECC International Limited of John Keay House, St Austell, Cornwall, England PL25 4DJ. It is a china clay which has been calcined at 1450°C, and consists of 55% mullite and 45% of a silica rich amorphous glassy phase. The chemical composition is Al 2 Si 2 0 7 . The total free silica content (both quartz and cristobalite have been detected) is less than 0.1%. The appearance is white powder or grains. The material is odourless, non- flammable, insoluble in water, and has a specific gravity of 2.7 g/cm 3 .
  • Calcined alumina is well known per se in the production of refractories, and is prepared by heat treatment of bauxite.
  • the components of the composition are sieved and impurities are removed before the components are mixed to form the composition.
  • the composition is subsequently sieved to obtain a regulated spread of particle size and hardness, this being necessary to achieve the uniform finish of the method.
  • a sieve is used which produces a composition having particle sizes up to 300 micrometres. A larger, coarser particle size is obtained using a coarser sieve.
  • Such a composition has uses where it is not required to obtain such a fine surface finish.
  • the method has the advantage that during use, no dust is produced and furthermore, the contents of the abrasive powder are non-hazardous, non-toxic and do not produce any allergic or narcotic reactions. It is also free of ammonia, asbestos, wax products and any other volatile or organic chemical or solvent,. and furthermore is not a pollutant.
  • a chemical analysis of the composition incorporating pumice, calcite alumina and MolochiteTM in a Vzi Vz: % by volume ratio shows that the composition contains the following compounds as a volume percentage of the total volume of the composition:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Detergent Compositions (AREA)
  • Road Repair (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé pour la préparation de la surface d'une pièce de carrosserie de voiture, qui consiste à appliquer sur ladite surface une poudre granuleuse solide ayant une action abrasive. L'invention concerne aussi une composition à base de poudre destinée à cette application. La composition en question comprend des proportions équivalentes d'alumine calcinée, de pierre ponce et de kaolin calciné, et on l'utilise sous forme sensiblement sèche.
PCT/GB1998/002208 1997-07-26 1998-07-23 Preparation de la surface des carrosseries de voiture et des pieces de carrosserie de voiture WO1999005234A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU84556/98A AU8455698A (en) 1997-07-26 1998-07-23 Keying vehicle bodies and vehicle body parts
GB0003995A GB2343188A (en) 1997-07-26 1998-07-23 Keying vehicle bodies and vehicle body parts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9715753A GB2329133A (en) 1997-07-26 1997-07-26 Keying vehicle bodies and vehicle body parts.
GB9715753.1 1997-07-26

Publications (1)

Publication Number Publication Date
WO1999005234A1 true WO1999005234A1 (fr) 1999-02-04

Family

ID=10816474

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/002208 WO1999005234A1 (fr) 1997-07-26 1998-07-23 Preparation de la surface des carrosseries de voiture et des pieces de carrosserie de voiture

Country Status (3)

Country Link
AU (1) AU8455698A (fr)
GB (2) GB2329133A (fr)
WO (1) WO1999005234A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934988A (en) * 1973-05-30 1976-01-27 London & Scandanavian Metallurgical Co., Limited Aluminum silicate particles having a layer of a rare earth oxide thereon
JPS6047089A (ja) * 1983-08-24 1985-03-14 Yasuhiro Yoshimura 研摩材組成物
JPH0841444A (ja) * 1994-07-26 1996-02-13 Tadao Koyakata 塗装面等の研磨用組成物とこれを用いた研磨方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1080442A (en) * 1963-02-22 1967-08-23 Luc Penelope Jane Vesey Adhesive and allied processes and products obtained thereby
JPS4931533B1 (fr) * 1970-09-21 1974-08-22
US4821400A (en) * 1988-04-04 1989-04-18 Pittsburgh Coil Technology Method of making brake shoe stock
JPH0615063B2 (ja) * 1988-06-27 1994-03-02 マツダ株式会社 塗装面の補修方法
US5264249A (en) * 1992-03-20 1993-11-23 Medtronic, Inc. Method for making a conductive coated product

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934988A (en) * 1973-05-30 1976-01-27 London & Scandanavian Metallurgical Co., Limited Aluminum silicate particles having a layer of a rare earth oxide thereon
JPS6047089A (ja) * 1983-08-24 1985-03-14 Yasuhiro Yoshimura 研摩材組成物
JPH0841444A (ja) * 1994-07-26 1996-02-13 Tadao Koyakata 塗装面等の研磨用組成物とこれを用いた研磨方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 175 (C - 292) 19 July 1985 (1985-07-19) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 006 28 June 1996 (1996-06-28) *

Also Published As

Publication number Publication date
GB0003995D0 (en) 2000-04-12
GB2343188A (en) 2000-05-03
GB2329133A (en) 1999-03-17
AU8455698A (en) 1999-02-16
GB9715753D0 (en) 1997-10-01

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