EP1968767B1 - Schleifwerkzeug mit geformter zwischenlage - Google Patents

Schleifwerkzeug mit geformter zwischenlage Download PDF

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Publication number
EP1968767B1
EP1968767B1 EP06847577A EP06847577A EP1968767B1 EP 1968767 B1 EP1968767 B1 EP 1968767B1 EP 06847577 A EP06847577 A EP 06847577A EP 06847577 A EP06847577 A EP 06847577A EP 1968767 B1 EP1968767 B1 EP 1968767B1
Authority
EP
European Patent Office
Prior art keywords
interface pad
base member
sanding tool
sheet
tool
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
EP06847577A
Other languages
English (en)
French (fr)
Other versions
EP1968767A4 (de
EP1968767A2 (de
Inventor
Eric R. Cybulski
Ryan Patrick Simmers
Jon A. Kirschhoffer
Ian R. Owen
Jonathan M. Lise
Steven E. Turch
John G. Petersen
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Publication of EP1968767A2 publication Critical patent/EP1968767A2/de
Publication of EP1968767A4 publication Critical patent/EP1968767A4/de
Application granted granted Critical
Publication of EP1968767B1 publication Critical patent/EP1968767B1/de
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
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material

Definitions

  • the present invention relates generally to hand-held, manually-operated, sanding tools that use a sheet of abrasive material such as sandpaper.
  • Manually-operated hand sanding tools such as sanding blocks, are commonly used with abrasive sheets, such as conventional sandpaper, to hand sand or finish a work surface.
  • a commercially available sanding block is the 3MTM Rubber Sanding Block available from 3M Company, St. Paul, MN.
  • Hand sanding tools may include a foam interface pad that is adhesively bonded to the working face of the sanding tool.
  • Such interface pads suffer from one or more drawbacks or shortcomings. It would be desirable to provide a hand-held, manually-operated, sanding tool that includes an interface pad that overcomes the drawbacks and shortcomings of sanding tools having adhesively bonded foam interface pads.
  • DE 30 50 786 C2 discloses a sanding disc for hand-held grinding tools comprising a support plate having on its back surface a fastening member for attachment to the spindle of the hand-held grinding tool and on its front surface a sole formed of a foamed material being foamed to the support plate.
  • Radially extending stiffening ribs are provided which are connected to the sole material.
  • the stiffening ribs are arranged at the front surface of the support plate facing the sole material and are fully embedded in the sole material.
  • the edge of the support plate has upstanding edge sections extending circumferentially.
  • the radially extending stiffening ribs which run approximately across the full diameter of the support plate, end at the upstanding edge sections.
  • the present invention provides a hand-held, manually-operated, sanding tool for use with a replaceable sheet-like abrasive material that includes a base member formed of a first material, a molded interface pad formed of a second injection moldable material provided on the base member, thereby defining a working face against which the sheet-like abrasive material is arranged, and a retaining mechanism arranged to maintain the sheet-like abrasive material in operative relation with the interface pad.
  • the interface pad is a polymeric material. In a more specific embodiment, the interface pad is an elastomeric material. In another aspect, the interface pad includes a textured working surface opposite the base member. In more specific aspects, the interface pad working face includes a macroscopically three-dimensional surface topography. The surface topography may comprise a random three-dimensional surface topography or it may comprise a regular non-random pattern defined by raised regions and recessed regions.
  • the base member contains slots and the interface pad includes extensions extending into the slots, thereby to form a secure connection between the base member and the interface pad.
  • Advantages of certain embodiments of the invention include improved sanding capability, improved product design flexibility (that is, the product design can be more easily tailored or adapted to a specific end-use application), easier and less expensive manufacturing, and a sanding tool that is easier and more comfortable to use.
  • FIGS 1 and 2 show a hand-held, manually-operated sanding tool or sanding block 2 for use with a flexible, replaceable, sheet-like abrasive material 40.
  • the term “manually-operated” refers to the fact that the tool 2 is not a power tool. That is, all of the power for the tool is provided by the user and the tool itself does not include a motor.
  • sheet-like abrasive material refers to thin, flexible, typically square or rectangular sheets of abrasive material having discrete ends that can be attached to a sanding block.
  • Such sheet-like abrasive materials include, for example, conventional sandpaper, flexible sanding scrims, non-woven abrasive materials such as Scotch-briteTM available from 3M Company, St. Paul, MN, and thin flexible abrasive sheet materials such as those described in U.S. Patent No. 6,613,113 (Minick et al. ).
  • the tool may also find use with non-abrasive sheet-like materials such as dust removing tack cloth materials.
  • the term does not include endless belts of abrasive material commonly used on power sanding tools, or die cut sheets that are sold pre-cut to match the size and shape of a particular sanding tool as is commonly done for power detail sanding tools.
  • the sanding tool 2 shown and described herein is described more fully in U. S. Patent Application Serial Number 11/117,932 filed April 29, 2005 .
  • the sanding tool 2 generally is not particularly significant as long as it is capable of including an interface pad and includes certain basic features such as the ability to receive and retain a sheet-like abrasive material.
  • the sanding tool 2 shown and described below is intended to represent any sanding tool capable of having a molded interface pad.
  • the base member 4 has first 10 and second 12 opposed ends and a generally planar bottom surface 14. Each end 10, 12 of the base member 4 has an inclined or angled contact surface 16, 18, respectively, opposite the bottom surface 14. In this manner, the contact surfaces 16, 18 and bottom surface 14 form an acute angle relative to the associated adjacent end 10, 12, respectively.
  • Each clamping mechanism 6, 8 is pivotally connected with opposite ends 10, 12 of the base member 4 adjacent the contact surface 16, 18, respectively, thereby defining a jaw into which the ends 40a, 40b of a sheet-like abrasive material 40 may be inserted.
  • Each clamping mechanism 6, 8 is movable between a closed position shown in FIG. 1 , and an open position shown in FIG. 2 . In the closed position, the clamping mechanisms 6, 8 are fully actuated toward the associated contact surfaces 16, 18, respectively, and, when no abrasive material is present, are arranged adjacent to the contact surfaces 16, 18, respectively. In the open position, the clamping mechanisms 6, 8 are spaced from the associated contact surfaces 16, 18, thereby defining gaps 20,21, respectively, between the base member 4 contact surfaces 16,18 and the clamping mechanisms 6, 8.
  • Each clamping mechanism 6, 8 includes a flexible tensioning member 22, 24 arranged to face the associated contact surface 16, 18. Arranged in this manner, as the clamping mechanisms 6, 8 are lowered toward the base member 4 to secure the abrasive material 40 to the tool 2, the terminal edges of the tensioning members 22, 24 slidably engage the contact surfaces 16, 18. Thus, when an end 40a, 40b of the abrasive sheet 40 is inserted in the gap 20, 21 between the base member 4 and a clamping mechanism 6, 8, and the clamping mechanism is moved from its open position to the closed position, the edge of the tensioning members 22, 24 will frictionally engage the end 40a, 40b of the sheet of abrasive material 40.
  • the tensioning members 22, 24 are thin flexible strips of metal, such as a leaf spring, that generally return to their original positions when the applied force is released. Other materials such as a stiff resilient rubber or synthetic plastic material may also be used.
  • the tensioning members 22, 24 extend continuously across the entire width of the clamping mechanisms 6, 8. By distributing the force in this manner, the tensioning members 22, 24 have a reduced tendency to tear or otherwise damage the abrasive sheet material 40.
  • the tensioning members 22, 24 may be curved or bowed inwardly such that the tensioning members 22, 24 have curved surfaces that face the contact surfaces 16, 18, and engage the contact surfaces when the clamping mechanisms 22, 24 are closed.
  • a molded interface pad 26 is provided on the bottom surface of the base member 4.
  • the interface pad 26 defines the surface against which the sheet-like abrasive material 40 is secured.
  • the base member 4 and interface pad 26 form an integrally molded body including an upper portion defined by the base member 4, and a lower portion defined by the interface pad 26.
  • the base member 4 is typically formed of a first polymeric material
  • the interface pad 26 is typically formed of a second polymeric material.
  • the second polymeric material used to form the interface pad 26 is typically softer than the material used to form the base member 4.
  • the molded interface pad 26 may be formed of any moldable material but is typically a soft, resiliently-flexible, elastomeric, injection moldable material.
  • Suitable injection moldable materials include natural and synthetic rubbers including latex and butyl rubber, thermoplastic elastomers such as polyurethane elastomers, thermoplastic vulcanizate, and thermoplastic rubber.
  • Suitable materials for the interface pad 26 typically have a Shore A hardness of less than about 95 and, more typically, less than about 70.
  • a suitable material for the molded interface pad 26 is available from Advanced Elastomer Systems, an affiliate of ExxonMobil Chemical, under the trade designation Santoprene.
  • the base member 4 is formed of a material having a Shore hardness that is greater than the Shore hardness of the material used to form the interface pad.
  • Suitable materials for the base member include hard synthetic plastic materials, typically thermo set or thermoplastic materials such as ABS (acrylonitrile butadiene styrene), polypropylene, polyethylene, and blends containing such materials.
  • Suitable materials for the base member 4 typically have a Shore D hardness of greater than about 30.
  • a suitable material for the base member 4 is available from GE Plastics under the trade designation Cycolac and Cycoloy (an ABS polycarbonate blend).
  • FIG. 3 is a detailed view showing the interconnection between the base member 4 and interface pad 26.
  • the base member 4 contains recesses or slots 28 and the interface pad 26 includes extensions 30 that extend into the slots 28.
  • a mechanical connection which resists dissociation, is formed between the base member 4 and the interface pad 26.
  • the slots 28 include optional flared end regions 28a
  • the extensions 30 include flared terminal portions 30a that extend into the flared end regions 28a of the slots 28.
  • Other structural features for forming the mechanical attachment between the base member 4 and the interface pad 26 are contemplated in connection with the present invention.
  • the mechanical connection may be formed, for example, by a single protrusion, which may have a variety of shapes, that mates with a cooperating recess.
  • the protrusion and recess may be formed in either the base member 4 or the interface pad 26.
  • base member 4 and the interface pad 26 may be formed via a chemical bond.
  • the interface between the base member 4 and the interface pad 26 may be generally planar (i.e. the base member 4 and the interface pad 26 each include generally planar surfaces that are attached to each other) or the interface may include structural features such as those described above to further enhance the interconnection between the base member and the interface pad 26.
  • the chemical bond is formed by selecting compatible materials that form a strong chemical bond.
  • the exposed working face of the interface pad 26 may include a textured surface 32 having a three-dimensional surface topography.
  • the three-dimensional surface topography is typically macroscopic meaning the height differential between the raised regions and the recessed regions is greater than about 1 millimeter.
  • the textured surface 32 may be a random pattern of raised regions 34 separated by recessed regions 36 or, as shown in FIG. 4b , the textured surface may be a regular repeating pattern of raised regions 34 and recessed regions 36.
  • Other surface geometries are contemplated in connection the present invention.
  • the size and shape of the raised and recessed regions may be varied or tailored depending on the type of abrasive sheet used and/or depending on the specific end use application for the tool.
  • the combination of the base member 4 and the interface pad 26 may be formed, for example, using known multi-material injection molding techniques including co-injection molding, overmolding, and multi-shot molding.
  • the base member 4 may be formed by injection molding a suitable material, such as ABS, into a mold to form the base member 4, and the interface pad 26 may be formed by injection molding a suitable material, such as Santoprene, to form the interface pad 26.
  • the base member 4 may be formed by casting or other known techniques.
  • the injection molded interface pad 26 may also include a variety of textures and/or patterns, it may be formed of any number of suitable moldable polymer materials depending on the desired durability and conformability properties, and it may be formed in a variety of colors or thicknesses, thereby greatly increasing the design options and design flexibility of the tool, and further allowing the tool design to be easily tailored for specific end uses.
  • the sanding tool 2 also includes a handle 46.
  • the handle 46 includes a neck portion 46a that extends upwardly from a central region of the base member 4, and includes an enlarged head portion 46b located at the end of the neck 46a that defines a knob 48 that can be readily grasped by a user to maneuver and control the movement of the tool 2.
  • the knob 48 portion of the handle 46 preferably comprises an interior region 48a formed of a relatively hard first material and a peripheral region 48b formed of a relatively soft rubber-like second material that is easier to grip and thereby provides the user with improved handling.
  • the first relatively hard material may be, for example, a hard synthetic plastic
  • the relatively soft second material may be, for example, a thermoplastic elastomer, rubber, rubber-like materials or foam.
  • the tool 2, including the base member 4, clamping mechanisms 6,8 and handle 46, may be formed of any suitable material including, for example, wood, metal, synthetic plastic, or a stiff rubber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Claims (10)

  1. Manuell betätigtes Handschleifwerkzeug (2) zur Verwendung mit einem austauschbaren flächigen Schleifmaterial (40), das Folgendes aufweist:
    (a) ein Basiselement (4), das erste und zweite gegenüberliegende Flächen, und eine Mehrzahl von Schlitzen (28) aufweist, wobei sich die Schlitze von der ersten Fläche aus erstrecken und dort offen, und im Verhältnis zu der zweiten Fläche geschlossen sind;
    (b) eine gegossene Zwischenlage (26), die auf dem Basiselement (4) vorgesehen ist, um eine Arbeitsfläche festzulegen, gegen die das flächige Schleifmaterial (40) angeordnet ist; und eine zweite Fläche gegenüber der Arbeitsfläche, wobei die zweite Fläche eine Mehrzahl von Erweiterungen (30) ausbildet, wovon jeweilige in bestimmte Schlitze (28) gegossen sind; und
    (c) einen Rückhaltemechanismus (6, 8), der angeordnet ist, um das flächige Schleifmaterial (40) in betriebsfähigem Verhältnis zu der Zwischenlage (26) zu halten;
    wobei das Basiselement (4) aus einem ersten Material ausgebildet ist, und die gegossene Zwischenlage (26) aus einem zweiten spritzgießbaren Material ausgebildet ist.
  2. Schleifwerkzeug nach Anspruch 1, wobei das erste Material eine Shore-Härte aufweist, die größer als die Shore-Härte des zweiten Materials ist.
  3. Schleifwerkzeug nach Anspruch 2, wobei das zweite Material eine Shore A-Härte von weniger als etwa 95 aufweist.
  4. Schleifwerkzeug nach Anspruch 3, wobei das erste Material eine Shore D-Härte von größer als etwa 30 aufweist.
  5. Schleifwerkzeug nach Anspruch 1, wobei die Zwischenlage (26) ein Polymermaterial ist.
  6. Schleifwerkzeug nach Anspruch 5, wobei die Zwischenlage (26) ein Elastomermaterial ist.
  7. Schleifwerkzeug nach Anspruch 6, wobei die Zwischenlage (26) aus mindestens einem von einem thermoplastischen Elastomer, einem thermoplastischen Vulkanisat und einem thermoplastischen Kautschuk ausgebildet ist.
  8. Schleifwerkzeug nach Anspruch 1, wobei das Basiselement (4) aus einem spritzgießbaren synthetischen Kunststoffmaterial ausgebildet ist und die Zwischenlage (26) aus einem spritzgießbaren Material ausgebildet ist, das weicher als das zum Formen des Basiselementes (4) verwendete Material ist.
  9. Schleifwerkzeug nach Anspruch 1, wobei die Zwischenlage (26) eine strukturierte Oberfläche (32) aufweist.
  10. Schleifwerkzeug nach Anspruch 1, wobei die Arbeitsfläche der Zwischenlage eine makroskopisch dreidimensionale Oberflächentopographie aufweist.
EP06847577A 2005-12-21 2006-12-13 Schleifwerkzeug mit geformter zwischenlage Not-in-force EP1968767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/314,799 US20070141969A1 (en) 2005-12-21 2005-12-21 Sanding tool with molding interface pad
PCT/US2006/047427 WO2007078743A2 (en) 2005-12-21 2006-12-13 Sanding tool with molded interface pad

Publications (3)

Publication Number Publication Date
EP1968767A2 EP1968767A2 (de) 2008-09-17
EP1968767A4 EP1968767A4 (de) 2010-08-04
EP1968767B1 true EP1968767B1 (de) 2011-09-14

Family

ID=38174274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06847577A Not-in-force EP1968767B1 (de) 2005-12-21 2006-12-13 Schleifwerkzeug mit geformter zwischenlage

Country Status (7)

Country Link
US (1) US20070141969A1 (de)
EP (1) EP1968767B1 (de)
CN (1) CN101346211B (de)
AT (1) ATE524274T1 (de)
BR (1) BRPI0621090A2 (de)
CA (1) CA2633843C (de)
WO (1) WO2007078743A2 (de)

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KR200491151Y1 (ko) * 2018-10-16 2020-05-15 김성석 칼갈이 겸용 휴대형 연마장치

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ITRM20110335A1 (it) * 2011-06-24 2012-12-25 Mattia Mauro Di Procedimento di rivestimento e dispositivo di lavorazione.
US9539487B2 (en) 2013-03-12 2017-01-10 Nike, Inc. Multi-material impact protection for contact sports
US10701991B2 (en) 2013-03-12 2020-07-07 Nike, Inc. Articulated protective apparatus
US9101171B2 (en) 2013-03-12 2015-08-11 Nike, Inc. Multi-component impact protection device for athletics
WO2015184344A1 (en) 2014-05-29 2015-12-03 Saint-Gobain Abrasives, Inc. Abrasive article having a core including a polymer material

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Also Published As

Publication number Publication date
CN101346211A (zh) 2009-01-14
US20070141969A1 (en) 2007-06-21
ATE524274T1 (de) 2011-09-15
CA2633843C (en) 2014-10-28
EP1968767A4 (de) 2010-08-04
EP1968767A2 (de) 2008-09-17
CN101346211B (zh) 2012-05-30
CA2633843A1 (en) 2007-07-12
WO2007078743A2 (en) 2007-07-12
WO2007078743A3 (en) 2007-08-23
BRPI0621090A2 (pt) 2011-11-29

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