EP1802424B1 - Tampon lustreur a flexibilite amelioree et face de polissage remplaçable - Google Patents

Tampon lustreur a flexibilite amelioree et face de polissage remplaçable Download PDF

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Publication number
EP1802424B1
EP1802424B1 EP05770946A EP05770946A EP1802424B1 EP 1802424 B1 EP1802424 B1 EP 1802424B1 EP 05770946 A EP05770946 A EP 05770946A EP 05770946 A EP05770946 A EP 05770946A EP 1802424 B1 EP1802424 B1 EP 1802424B1
Authority
EP
European Patent Office
Prior art keywords
layer
performance
foam
cushioning layer
fastener
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP05770946A
Other languages
German (de)
English (en)
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EP1802424A1 (fr
Inventor
Scott S. Mclain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lake Country Manufacturing Inc
Original Assignee
Lake Country Manufacturing Inc
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 Lake Country Manufacturing Inc filed Critical Lake Country Manufacturing Inc
Publication of EP1802424A1 publication Critical patent/EP1802424A1/fr
Application granted granted Critical
Publication of EP1802424B1 publication Critical patent/EP1802424B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • B24D9/085—Devices for mounting sheets on a backing plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material

Definitions

  • the present invention pertains to rotary or dual action buffing pads made of polymeric foam material and, more particularly, to a composite pad construction that includes an intermediate cushioning layer having a graded compression load deflection and a relatively much thinner performance layer that provides the necessary surface finishing function, but can be easily and inexpensively replaced when worn or damaged.
  • Polymeric foam buffing pads have been used for many years to perform a variety of buffing functions for painted and clear coat surfaces in the automobile and other industries. As the construction of foam buffing pads evolved, it became apparent that open cell polyurethane foam materials provided the best performance. Currently, reticulated open cell polyurethane foams are the most desirable polymeric foams for buffing functions. However, reticulated open cell polyurethane foam materials are also the most expensive. This material provides a combination of surface finishing performance and cushioning effect that has made reticulated open cell polyurethane foams the most desirable polymeric foam in the buffing industry.
  • Typical polyurethane foam pads range in size from less than 6 inches to greater than 8 inches (about 150-200 mm) in diameter, and 1.25 to 1.75 inches (about 30-45 mm) in thickness.
  • the thickness of the material in particular, is necessary to provide proper cushioning for the desired finishing operation. However, only a small part of the surface contacting face of the pad is actively used for the desired buffing or finishing operation.
  • Document US 6,044,512 describes a rotary buffing pad with a concave working face which according to one embodiment is demountably attached to a cushioned backing plate with a hook and loop fastener.
  • the cushioned backing plate includes a rigid backing plate to which an intermediate cushion pad is attached.
  • the invention is directed the surface buffing apparatus according to claim 1.
  • most of the cushioned support for a polyurethane foam buffing pad is provided by polymeric foam material that does not directly contact the surface to be finished, is made of less expensive material, and is provided with graded levels of compression load deflection.
  • This composite pad construction provides performance that is identical to a monolithic reticulated open cell polyurethane foam pad, but at considerably less cost.
  • a relatively thin performance layer, made of the more expensive polyurethane foam, is removably attached to the less expensive foam cushioning layer.
  • a rotary buffing and finishing apparatus of the type that provides flexible cushioned support for a high performance contacting face, includes a polymeric foam cushioning layer that has a graded compression load deflection that decreases from a rear face to a front face and provides the primary cushioned support.
  • a relatively thin performance layer provides the entire high performance surface contact and is removably attached to the foam cushioning layer.
  • the apparatus of the present invention preferably includes a backing plate that is attached to the rear face of the foam cushioning layer and supports the foam layer.
  • the backing plate and the cushioning layer may comprise an integrally molded urethane material that provides the graded compression load deflection that varies from a relatively hard but somewhat flexible backing plate to a much softer front face for attachment to the performance layer.
  • the backing plate has a circular front face that is rotatable on a center hub with an axis perpendicular to the front face
  • the foam cushioning layer is also of a circular shape and has one-half of a hook and loop fastener attached to its front face.
  • a performance layer which is also circular in shape, has a rear face that carries the other half of the hook and loop fastener and a front operating face that is selected to provide a surface contact optimized for a given buffing or finishing operation.
  • the performance layer is selected from the group consisting of reticulated open cell polyurethane foam, tufted wool, knitted wool, polymer microfibers, and combinations thereof.
  • the hook and loop fastener halves may be heat laminated or glued to the respective faces of the foam cushioning layer and the performance layer. Either one of the interfaces between the hook and loop fastener halves and the faces of the cushioning layer or performance layer, preferably the latter, may be provided with a barrier material to prevent migration of liquid and compound from the performance layer to the foam cushioning layer.
  • the front face of the foam cushioning layer is generally planar and terminates in an outer edge that is upwardly rounded.
  • a portion of the half of the hook and loop fastener is positioned on the rounded outer edge and the other half of the fastener on the performance layer is dimensioned to wrap around the outer edge to engage the portion of the first half of the fastener. This imparts a cup shape to the performance layer.
  • Fig. 1 is a perspective view of a rotary buffing pad assembly of the present invention mounted on the drive shaft of a power driving machine.
  • Fig. 2 is a top plan view of the assembly shown in Fig. 1 .
  • Fig. 3 is an exploded view of the assembly shown in Figs. 1 and 2 .
  • Fig. 4 is a bottom plan view of the cushioning layer of the assembly taken on line 4-4 of Fig. 3 .
  • Fig. 5 is an assembled elevation view of the apparatus of Fig. 3 .
  • Fig. 6 is a sectional detail of Fig. 5 .
  • Fig. 7 is an elevation view of an alternate embodiment of the invention, partly in section.
  • a rotary buffing tool assembly 10 includes a one-piece hub 11 and backing plate 12, carrying an intermediate cushioning layer 16 to which is releasably attached a relatively thin circular performance layer 13 that provides surface contact for the buffing or finishing operation.
  • the hub 11 is preferably made of a hard plastic, such as a molded nylon, and includes a central nut 14 insert molded into the hub to provide connection to a power driving tool.
  • the integral backing plate 12 extends radially outwardly from the hub 11 and has a generally conical front face 15 that ends in a flattened outer edge 19.
  • the cushioning layer 16 of a polymeric foam material is attached to the hub and the front face 15 of the backing plate and also extends upwardly around the peripheral edge 19 of the backing plate 12 to form a rounded outer edge 17.
  • the front face 18 of the cushioning layer 16 is generally flat and has attached thereto a circular fastener layer 20 comprising one-half of a hook and loop fastener (typically the hook half).
  • the rounded outer edge 17 of the cushioning layer 16 has attached thereto an outwardly facing thin fastener strip 21, also comprising the same hook and loop fastener material as the circular fastener layer 20.
  • the performance layer 13 comprising a reticulated open cell polyurethane foam in the example shown, is cut in the shape of a thin circular disc.
  • the thickness of the performance layer 13 may be about 3/8 inch (about 10 mm), but the thickness may vary considerably, particularly if the performance layer is selected from an entirely different material as will be discussed hereinafter.
  • the rear face 22 of the performance layer 13 has attached thereto a circular fastener layer 23 comprising the other half of the hook and loop fastener (typically the loop half), i.e. complimentary to the circular fastener layer 20 on the front face of the cushioning layer 16.
  • the diameter of the performance layer 13 is larger than the diameter of the cushioning layer 16.
  • the outer edge of the polyurethane foam performance layer 13 is turned upward and wrapped around the rounded outer edge 17 of the cushioning layer.
  • the edge of the circular fastener layer 23 on the rear face of the performance layer 13 engages the fastener strip 21 on the rounded outer edge 17 of the cushioning layer to hold the performance layer in a cupped shape, as shown.
  • the cushioning layer 16 is molded directly to the hub and backing plate 11, 12.
  • the cushioning layer 16 is formed with a graded compression load deflection that decreases from a rear face 24 in contact with the front face 15 of the backing plate to the front face 18 where it is attached to the rear face of the performance layer 13.
  • compression load deflection is used in the polymeric foam industry as a measure of the compressibility of a foam material.
  • the compression load deflection is measured at 40% compression of a test piece.
  • a CLD of .65 to 1.25 psi about 4.5 to 8.6 kPa
  • the cushioning layer 16 is preferably made of a foam material that is less expensive than the material used for the performance layer.
  • the cushioning layer 16 is molded such that its compression load deflection (or equivalent property) decreases from the rear face 24 (adjacent the backing plate 12) to the front face 18 (where it is attached to the rear face of the performance layer 13).
  • the polymeric foam from which the cushioning layer 16 is formed provides a cushioning effect that is virtually the same as it would be if the combined cushioning layer and performance layer were made of a single monolithic piece of high performance reticulated open cell polyurethane foam.
  • Foam materials such as molded polyurethane, that are far less expensive than the high performance foam layer 13, may be used.
  • the backing plate 12 is also made of a material which, though significantly harder than the foam cushioning layer 16, retains a flexibility that adds to the cushioning effect. A satisfactory result may be obtained with a construction utilizing a flexible backing plate 12 and a cushioning layer 16 that comprises a material of uniform hardness across its full depth. In general, whether the graded cushioning effect provided by the components of the subject invention is measured by compression load deflection, durometer or density, the key is that such property decreases from the backing plate to the front face 18 of the cushioning layer 16.
  • the graded CLD (or graded durometer) of the cushioning layer 16 is provided by joining two separate layers of polyurethane foam having different CLDs (and densities).
  • a first layer 33 of higher CLD polyurethane foam is molded to the hub and backing plate 11, 12 and second layer 34 of a lower CLD polyurethane foam is molded directly to the first layer 33.
  • molded polyurethane foam layers 33 and 34 having respective durometers (Shore A) of about 30 to 32 and 10 to 15 were used to form a cushioning layer 16 having a diameter of 4.5 inches (about 115 mm).
  • the second layer 34 had a uniform thickness of about 1/2 inch (about 13 mm), and the thickness of the upper layer 33, though having a variable cross-section, also averaged about 1/2 inch (13 mm) in thickness.
  • the first layer 33 is also molded to extend around the flattened outer edge 19 of the backing plate, as shown.
  • the thin performance layer 13 may simply be peeled away from the cushioning layer 16 and replaced. This results in a considerable saving where a monolithic high performance foam buffing pad, having a typical thickness in the range of 1.25 to 1.5 inches (about 32 to 40 mm), would otherwise have to be discarded.
  • Each of the circular fastener layers 20 and 23 (as well as the fastener strip 21) normally includes an adhesive layer that is used to adhere the fastener layers to the surfaces being joined.
  • the adhesive layers are preferably eliminated and the hook and loop fastening pieces are adhered directly to the respective foam cushioning layer and foam performance layer by flame lamination or other suitable heating or gluing process.
  • a layer of barrier material would thus protect the foam cushioning layer, and when applied to the rear face 22 of the performance layer 13, will also protect the fastener layers 20 and 23 from contamination and plugging.
  • FIG. 7 there is shown an alternate embodiment of a replaceable performance layer 25 that is also mounted on a modified backing plate 26 via an intermediate cushioning layer 27.
  • a hook and loop fastener 29 is attached to the rear face 28 of the performance layer 25 and the other half 36 to the front face 30 of the cushioning layer 27 permitting easy replacement of the performance layer.
  • the peripheral edge of the cushioning layer 27 is provided with a frustoconical edge surface 32.
  • the performance layer 25 may be the same size, shape and material as in the previously described embodiment. This arrangement provides a performance layer with a relatively square peripheral edge for certain buffing operations on surfaces having an abrupt change in contour.
  • the cushioning layer 27 is made with the same graded compression load deflection as the cushioning layer 16 of the previously described embodiment.
  • the backing plates 12 and 26 have relatively thin sections from the flattened outer edge 19 all the way to their juncture with the hub 11.
  • the molded plastic hub and backing plate is relatively hard, as compared to the various foam materials, the thin section of the backing plate adds an additional measure of flexibility to the buffing assembly. It is believed that this additional flexibility enhances the overall performance and permits the use of heavier, more dense and higher CLD foam materials in the cushioning layers 16 and 27, as compared to a single monolithic block of reticulated open cell polyurethane foam such as comprises the performance layers 16 and 25.
  • the thin performance layers of reticulated open cell polyurethane foam that characterize the previously described embodiments may be replaced with performance layers of other materials using the same cushioning layer and back-up plate arrangements previously described.
  • performance layers of tufted wool, knitted wool, non-woven fibers, polymer microfibers, and combinations thereof, all in relatively thin sections may be used.
  • these alternate performance layers should also be provided with a layer of barrier material to prevent contamination of the fastener system and the cushioning layer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Laminated Bodies (AREA)
  • Materials For Medical Uses (AREA)
  • Dental Preparations (AREA)

Claims (11)

  1. Appareil de polissage de surface (10) du type conférant un support amorti flexible pour une face en contact avec une surface de haute performance, ledit appareil comprenant une plaque de renfort flexible (12) à laquelle est moulée une couche d'amortissement en mousse polymère (16), ladite plaque de renfort (12) et la couche d'amortissement (16) formant ensemble le support amorti flexible, et une couche de performance jetable (13) attachée de façon amovible à la couche d'amortissement en mousse (16) avec une fermeture auto-agrippante (20, 23), moyennant quoi l'appareil (10) dans son intégralité, sauf la couche de performance jetable (13), est préservé pour une utilisation multiple, caractérisé en ce que
    la couche d'amortissement en mousse polymère (16) forme une déflexion de charge par compression progressive en joignant deux couches en mousse séparées (33, 34) ayant des déflexions de charge par compression et densités différentes, moyennant quoi la première couche (33) de plus haute déflexion de charge par compression est moulée sur la plaque de renfort (12) et la seconde couche (34) de mousse de plus basse déflexion de charge par compression est moulée directement sur la première couche (33) et
    la couche de performance jetable (13) est relativement fine et choisie dans le groupe consistant en une mousse de poly(uréthane) à cellules ouvertes, la laine touffetée, la laine tricotée, les microfibres polymères, et leurs combinaisons, formant l'intégralité du contact de surface de haute performance pour le polissage.
  2. Appareil selon la revendication 1, dans lequel la couche d'amortissement en mousse (16) est définie par un bord externe (17) qui est de section généralement circulaire, et la couche de performance fine (13) comporte un bord externe arrondi avec une surface interne qui vient en butée contre et se conforme au bord externe (17) de la couche d'amortissement (16).
  3. Appareil selon la revendication 2, dans lequel la couche de performance fine (13) est préformée en forme de plat choisi pour se conformer à la forme du bord externe (17) de la couche d'amortissement (16).
  4. Appareil selon la revendication 1, dans lequel la plaque de renfort (12) a une face avant circulaire (15) et est rotative sur un axe central perpendiculaire à la face avant ;
    la couche d'amortissement en mousse (16) étant de forme circulaire et ayant une moitié d'une fermeture auto-agrippante (20) attachée à sa face avant (18) ; et
    la couche de performance (13) ayant une face arrière (22) portant l'autre moitié de la fermeture auto-agrippante (23) et ayant une face opératoire choisie pour former un contact de surface optimisé pour une opération donnée de polissage ou finissage.
  5. Appareil selon la revendication 4, dans lequel les moitiés de fermeture (20, 23) sont stratifiées à chaud sur les faces respectives de la couche d'amortissement en mousse (16) et la couche de performance (13).
  6. Appareil selon la revendication 4, dans lequel les moitiés de fermeture (20, 23) sont collées aux faces respectives de la couche d'amortissement en mousse (16) et la couche de performance (13).
  7. Appareil selon la revendication 4, dans lequel au moins l'une de l'interface entre les moitiés de fermeture (20, 23) et les faces respectives (18, 22) de la couche d'amortissement de mousse (16) et la couche de performance (13) est pourvue d'un matériau barrière (35) pour empêcher la migration de liquide et de composé de la couche de performance (13) à la couche d'amortissement en mousse (16).
  8. Appareil selon la revendication 7, dans lequel la couche barrière (35) est entre la face arrière (22) de la couche de performance (13) et l'autre moitié (23) de la fermeture.
  9. Appareil selon la revendication 4, dans lequel la face avant (18) de la couche d'amortissement en mousse (16) est généralement plane et se termine dans un bord externe (17) qui est arrondi vers le haut, une portion (21) de la moitié de la fermeture (20) est positionnée sur le bord externe arrondi (17), et l'autre moitié de la fermeture (23) sur la couche de performance (13) est dimensionnée pour s'étendre sur ledit bord externe (17) pour venir en prise avec la portion (21) de la première moitié de la fermeture (20) et communiquer une forme de coupe à la couche de performance (13).
  10. Appareil selon la revendication 1, dans lequel la couche d'amortissement (16) est moulée sur et autour du bord externe flexible (19) de la plaque de renfort (12).
  11. Appareil selon la revendication 10, dans lequel la plaque de renfort (12) comprend un nylon moulé et la couche d'amortissement (16) comprend de l'uréthane moulé.
EP05770946A 2004-09-10 2005-07-12 Tampon lustreur a flexibilite amelioree et face de polissage remplaçable Not-in-force EP1802424B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/939,174 US20060053576A1 (en) 2004-09-10 2004-09-10 Buffing pad with graded flexibility and replaceable working face
PCT/US2005/024557 WO2006031286A1 (fr) 2004-09-10 2005-07-12 Tampon lustreur a flexibilite amelioree et face de polissage remplaçable

Publications (2)

Publication Number Publication Date
EP1802424A1 EP1802424A1 (fr) 2007-07-04
EP1802424B1 true EP1802424B1 (fr) 2010-04-14

Family

ID=35115690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05770946A Not-in-force EP1802424B1 (fr) 2004-09-10 2005-07-12 Tampon lustreur a flexibilite amelioree et face de polissage remplaçable

Country Status (9)

Country Link
US (1) US20060053576A1 (fr)
EP (1) EP1802424B1 (fr)
JP (1) JP2008512263A (fr)
AT (1) ATE464156T1 (fr)
AU (1) AU2005285456A1 (fr)
CA (1) CA2579432A1 (fr)
DE (1) DE602005020660D1 (fr)
MX (1) MX2007002859A (fr)
WO (1) WO2006031286A1 (fr)

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JP6693768B2 (ja) * 2016-02-26 2020-05-13 株式会社フジミインコーポレーテッド 研磨方法
WO2017146006A1 (fr) * 2016-02-26 2017-08-31 株式会社フジミインコーポレーテッド Procédé de polissage et tampon de polissage
JP6700855B2 (ja) * 2016-02-26 2020-05-27 株式会社フジミインコーポレーテッド 研磨方法
JP6730595B2 (ja) * 2016-06-30 2020-07-29 キョーラク株式会社 クッションパッド及びそれを用いたロボットアーム
KR102578503B1 (ko) * 2016-09-12 2023-09-14 삼성디스플레이 주식회사 연마 장치
DE102017122141A1 (de) * 2017-09-25 2019-03-28 Jakob Löwer Inh. von Schumann GmbH & Co. KG Vorrichtung zur Erzeugung eines undefinierten Finishes auf einer Oberfläche eines metallenen Werkstückes im Durchlaufverfahren
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DE102019005084A1 (de) * 2019-07-16 2021-01-21 Schneider Gmbh & Co. Kg Polierwerkzeug sowie Vorrichtung zum Polieren eines Werkstücks
CN113696107A (zh) * 2021-09-08 2021-11-26 江苏锋泰工具有限公司 一种减震轻型橡胶金刚石磨轮
CN113681474A (zh) * 2021-09-08 2021-11-23 江苏锋泰工具有限公司 一种减震轻型橡胶金刚石磨轮的制备方法

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Also Published As

Publication number Publication date
MX2007002859A (es) 2007-05-16
CA2579432A1 (fr) 2006-03-23
DE602005020660D1 (de) 2010-05-27
AU2005285456A1 (en) 2006-03-23
US20060053576A1 (en) 2006-03-16
ATE464156T1 (de) 2010-04-15
JP2008512263A (ja) 2008-04-24
WO2006031286A1 (fr) 2006-03-23
EP1802424A1 (fr) 2007-07-04

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