EP0847323B1 - Schleifband sowie verfahren und vorrichtung zum herstellen desselben - Google Patents

Schleifband sowie verfahren und vorrichtung zum herstellen desselben Download PDF

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Publication number
EP0847323B1
EP0847323B1 EP96930131A EP96930131A EP0847323B1 EP 0847323 B1 EP0847323 B1 EP 0847323B1 EP 96930131 A EP96930131 A EP 96930131A EP 96930131 A EP96930131 A EP 96930131A EP 0847323 B1 EP0847323 B1 EP 0847323B1
Authority
EP
European Patent Office
Prior art keywords
threads
bond
thread
abrasive belt
belt according
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.)
Expired - Lifetime
Application number
EP96930131A
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German (de)
English (en)
French (fr)
Other versions
EP0847323A1 (de
Inventor
Ernst Prahl
Eckart Uhlmann
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.)
Hermes Schleifmittel GmbH and Co KG
Original Assignee
Hermes Schleifmittel GmbH and Co KG
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 Hermes Schleifmittel GmbH and Co KG filed Critical Hermes Schleifmittel GmbH and Co KG
Publication of EP0847323A1 publication Critical patent/EP0847323A1/de
Application granted granted Critical
Publication of EP0847323B1 publication Critical patent/EP0847323B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials

Definitions

  • the invention relates to an abrasive belt according to the preamble of claim 1 and a process for the manufacture of such an abrasive belt Preamble of claim 24.
  • Such an abrasive belt and a Methods for its production are e.g. known from WO-A-95/22438.
  • Sanding belts consist of a flexible underlay, which the Transfers grinding forces, and one thereon by means of a binder anchored abrasive grain layer.
  • a binder anchored abrasive grain layer usually will initially up to 3000 meters long webs wound into rolls already coated with binder and abrasive grain Pad manufactured.
  • These lanes become the individual Made-up abrasive belts by moving from a web accordingly cut the dimensions of the sanding belt to be made and their ends using special connection techniques joined to form an endless abrasive belt become.
  • the connection point forms in the course of the grinding belt an undesirable inhomogeneity both because of the changed Flexibility, as well as increased or decreased Thickness, by which the running behavior of the belt and the engagement behavior the grain tips impaired and errors of the Sanding pattern can be caused.
  • connection point at an angle or even at an acute angle to the tape running direction is arranged (US-A 4,018,578, EP-A 626238), especially since such an arrangement usually comes into conflict with the requirement, the direction of greatest tensile strength and lowest Arrange the underlay in the tape running direction.
  • connection point on the one hand application technology repeatedly limits the use of tools and secondly, premature failure due to wear (tearing) of the sanding belt.
  • the invention is therefore based on the object of an abrasive belt of the type mentioned at the outset to create the connection point free is and has high transverse strength. It is also intended to be a manufacturing process and a suitable device is provided become.
  • the solution according to the invention is that the threads to be connected between each other without space.
  • the thread cohesion in the transverse direction is sufficient is fixed, may refer to other components of the Underlay or the abrasive belt, the transverse strength justify, be waived.
  • an auxiliary pad is provided is and the thread tie to connect the individual Threads with the auxiliary pad is formed.
  • the angle between the direction of the sanding belt and the thread direction should not be larger than 3 °. It lies better below 1 °, better still below 0.5 °.
  • the thread direction is correct consequently with the direction of travel of the belt essentially match, so that the direction of greatest strength and least stretch of the finished abrasive belt with the belt running direction matches.
  • the auxiliary document has the task of producing the Simplify sanding belt underlay in the winding process and the To facilitate detachment of this layer from the winding device. It can also take on tasks in the finished sanding belt, in particular a contribution to the formation of the transverse strength of the sanding belt or the thread layer in front of the back Abrasion from the rollers driving the sanding belt or by a support element, which the grinding belt against Workpiece presses to protect. As a rule, this is the Auxiliary pad part of the finished sanding belt. It can however, there are applications where they are undesirable in the sanding belt or is unnecessary.
  • an auxiliary document or the binding agent that connects them to the thread selected such that easy removal of the auxiliary pad is possible.
  • the cross strength of the sanding belt can then, for example, through a fiber-reinforced thread binding to be guaranteed.
  • the auxiliary document can be of different kinds Material can be formed, for example from fiber and Textile material such as fleece, woven or knitted fabrics. She can be formed by plastic or metal foils. Combinations too several such surface materials are possible. It can be on the side of the thread layer to be formed is already grained. When it comes to high uniformity and dimensional stability arrives for example polyester or polyimide films. If the Structural roughness of textile material is not considered a disadvantage is felt, there are fabrics or knitted fabrics in particular on.
  • the auxiliary document should preferably be procured in this way be that it ensures the transverse strength of the sanding belt. However, its strength in the tape running direction should be in relation to the longitudinal strength of the thread layer if possible affect little. You should also have flexibility in Influence the tape running direction as little as possible, so that no significant discontinuity in the abrasive belt properties at their joint results.
  • the thread binding of an adhesive and hardening material especially since they rely on proven materials and techniques can fall back.
  • the invention can also provide be that the threads with the auxiliary pad and / or with each other are welded.
  • monofilament or ribbon-shaped threads made of thermoplastic material with a film from the corresponding, forming the auxiliary base Material can be connected by laser welding. Further can also monofilament threads by friction or pressure welding be connected to each other.
  • the thread tie solidified resin material becomes flat or else, for example only applied to that part of the auxiliary document to which first the wound thread is put down. Instead, can the mass also applied to the thread and by this be transported to the changing station.
  • the immediate fixation the thread on the auxiliary pad is through one on this existing contact adhesive layer possible; serves in this case the thread tying is sufficient Cross strength.
  • Sanding belt is the auxiliary underlay on the grain layer opposite side of the threads. The pad needs then not turned over before applying the grain layer become.
  • the grain layer it is advisable to apply the grain layer apply a filler bond to the threads that the spaces between the threads on the one facing away from the auxiliary pad Fills the page and, if necessary, the threads or the spaces between the threads completely or partially covered.
  • the latter is above all advantageous if the material of the basic grain bond is not adheres sufficiently to the thread material or if it is in particular if fine grain is necessary, a smooth, to create an even surface for the application of grain.
  • the filler bond can also be used to form the transverse strength of the Grinding belts can be used, for example is reinforced by fibers. These can be in the form of a flat structure - e.g. a fleece - or in the case of a resin-fiber mixture be introduced as an ingredient of the resin. When it matters, in this area of the sanding belt to ensure greater transverse strength can between the filler bond and the grain base bond also others Elements are inserted, for example those running in the transverse direction Thread coulters or a film made of plastic or Metal or the like.
  • the filler bond and the grain base bond need regarding of the order and the material properties are not separate to be. Rather, the filler binding can also be used as a basic binding be used for the grain. This also applies in the case a fiber reinforcement of the filler bond.
  • the filling binding can also coincide with the thread binding, for example by the thread binding during the winding process supplied in such a way will that the space between the threads on the Auxiliary pad fills the side facing away. Or it can on the The addition of binders can be dispensed with during winding and then instead from the auxiliary document facing away from the binder so that the spaces between the threads are sufficiently deep, possibly up to Auxiliary pad out, penetrates.
  • the filler bond can thus With regard to the terminology of the claims part of the thread binding be or this (possibly together with the basic binding) form.
  • the pad can after winding the threads and sufficient hardening of the thread binding and possibly the filling binding be turned. Or the auxiliary document will be after Winding the layer of thread applied. Then the Grain layer on the back of the auxiliary pad or after Peel off the auxiliary pad on the back of the thread layer upset.
  • a smooth auxiliary pad, Threads, thread binding and / or filling binding existing pad to turn and with the smooth surface of the auxiliary pad.
  • the threads are expediently arranged in one layer, which does not rule out a multi-layer arrangement in special cases. In the latter case, the threads are then through the thread binding and / or the filling binding are connected to one another.
  • the threads can also be connected to one another by that they are galvanically integrated from the later grain side become.
  • the threads are free of gaps arranged.
  • An even more homogeneous thread layer is achieved one if they overlap one another (with an elongated cross-section) or arranged with mutual shape adjustment become.
  • the latter can be achieved with a loose thread structure, as they are especially with rovings (little or no twisted fiber strands) is present.
  • the fibers of loosely structured threads Spread out on the auxiliary pad in the wrapping process. This applies especially for high-strength material such as carbon fibers or Aramid fibers, in which the thread layer or fiber layer overall, however, it can be as uniform as possible Distribution of the fibers across the width is desired.
  • thread is Every winding structural element is meant, its cross-sectional dimensions are very small compared to the grinding bandwidth. It can be monofilaments that are not necessarily need to have a round cross-section. A square or rectangular cross section (ribbon) can be used to achieve a flat, resilient connection of adjacent thread turns be appropriate. Its width preferably exceeds not ten times their thickness. An additional Stabilization with an auxiliary underlay or a filling layer can become unnecessary. This also applies to thread materials with a large number of individual, transverse to the direction of extension of the thread-oriented fibers or thread components. But it can also be filament or staple fiber threads act. Depending on their material suitability Use case for example cotton, polyester, aramid, Glass or carbon fibers and metals and the like Materials. Furthermore, it can be mixed materials such as metallic or conductive coated materials.
  • a single thread can be provided.
  • the winding process can also have several separate threads be wrapped side by side as a group.
  • the threads of Thread group can be placed individually or together on the changing mat be listed. In the latter case, the thread group consist of separate threads that only by the Thread guides of the winding device are combined.
  • the threads can also be combined into a band beforehand have been, for example, by mutual gluing or by connecting the individual threads with a carrier tape. This need not have any substantial strength and can therefore be made of paper or nonwoven material or the like consist. It is not necessary (but also not excluded) that there is a function in the sanding belt pad takes over. If necessary, it can be removed after wrapping.
  • a winding drum is suitable for winding the thread layer, the winding circumference of the sanding belt length to be generated equal. So that the product can be removed, the Winding circumference can be reduced.
  • the Winder also several (especially a pair) of have a winding support belt rotating rollers, the Length of the winding support tape the length of the to be generated Sanding belts are the same.
  • the winding support tape can, if necessary Form auxiliary document. But it can also be an additional one Support tape may be provided on which the auxiliary pad is stretched becomes.
  • the wrap support band can also be used for this the acceptance of the wound product and, if applicable, its To facilitate transfer for further processing.
  • the product can be stabilized removed from the winding device by the support band and fed to another storage or processing station become. There can be several on the same support band Manufacturing and processing stations run through.
  • a support band also has the advantage that it in many cases easier from the winding device - be it a pair of rollers or a drum - can be separated as one base directly wound on the winding device.
  • that removed from the winding device Support tape can be easily separated from the pad. This applies regardless of the type of winding device.
  • a winding drum a thin-walled, preferably metallic cylinder, due to only slight changes in the circumference of the winding drum these can be applied and tensioned or removed.
  • the wrapped sanding belt pad - if it is not already on the winding machine further processed by coating and graining was - can be clamped on the auxiliary device from removed from the winding machine and then simply by this separately or in this setting another Processing facilities are supplied.
  • the backing of the grinding belt according to the invention has particularly high requirements just as they are for the use of high-performance abrasives (e.g. diamond or cubic drilling nitride) apply, for which a galvanic bond is appropriate.
  • high-performance abrasives e.g. diamond or cubic drilling nitride
  • This can be placed on a base with an electrically conductive thread and / or electrically conductive filler bond applied become.
  • Used sanding belts can contain individual layers, which are to be disposed of as special waste. Because of you it may be necessary be to classify the entire sanding belt as special waste. Furthermore, it may be desirable to use substances in certain Recycle layers of an abrasive belt without using certain foreign matter in other layers of the same Abrasive belts are found, are contaminated.
  • the invention therefore provides that the sanding belt is in a suitable place contains constructive or material elements that allow the parts of both sides of the separating layer Separate sanding belt.
  • This separation layer can for example opposite layers by a distinguish lower resistance to separation, this if necessary, also by means of suitable chemical or physical Treatment occurs before or during the separation. It can be, for example, a thermoplastic layer, which is the separation of those on both sides of it Abrasive belt layers allowed at elevated temperature.
  • a particular advantage of the invention is that the entire production of an abrasive belt in one go can be done while the pad is on one and the same Support structure if possible held in one and the same machine becomes.
  • the manufacturing technology according to the invention enables production of sanding belts of different sizes and types, without - as in conventional manufacturing from basic production and further processing - always on specific semi-finished products in the form of webs already grained Document must be used. Accordingly, it is not canceled only the need for the availability of an extensive range of semi-finished products, but beyond also a higher degree of manufacturing flexibility and variety of products achieved by practically all the specific Properties of the tool-related design and Structural elements to be determined at the start of production can. The products obtained in this way are quickly available and could also be decentralized in comparatively small production facilities are manufactured.
  • the conventional sequence of document production, basic production and assembly is in favor of a flexibly controllable, modular structure Complete production overcome.
  • an auxiliary support 2 having a thin auxiliary connection point 3 is first applied to a winding device consisting of two rollers 1 with a variable spacing.
  • a winding device consisting of two rollers 1 with a variable spacing.
  • rollers 1 consists of a polyester film. Their length corresponds to the length of the sanding belt to be produced.
  • the rollers 1 are set so that the auxiliary pad 2 is sufficiently tensioned for the winding process but is stretched as little as possible.
  • the corresponding thread stretch is set by means of the thread brake 8.
  • a thread 4 is wound on the winding device which is rotated in the direction of the arrow, with winding coming to lie next to winding and the distance between the individual windings being set in such a way that such a large number of thread turns per unit width of the grinding belt is omitted that this has the desired longitudinal strength, elongation and surface structure provided by the threads.
  • the thread 4 is unwound from a roll 5 and guided by a thread guide 6 so that the desired thread spacing is achieved.
  • a winding drum 7 is provided consisting of several relative to each other such adjustable drum segments, that the circumferential length of the drum is changed and can be adjusted to the desired tape length.
  • an auxiliary support 2 is stretched onto the winding device, onto which the thread 4 is then wound from the roll 5 via the thread guide 6.
  • the surfaces of the rollers 1 or the drum 7 can be provided with a strongly adhesive surface.
  • the thread binding When the thread binding is applied before or during the winding process , it can be limited to only one for handling the elements during the manufacturing process sufficient fixation of the thread on the Auxiliary pad or thread on adjacent threads brought about. The final interconnection of the elements then happens through a subsequently applied filler layer. However, there is the possibility of thread binding to be provided in advance in such large quantities that a special one Filling layer becomes unnecessary.
  • the thread binding supplemented by the filler binding has the task tie the threads firmly into the arrangement. she can possibly form the only bond for the threads, for example when a previously applied thread tie is missing or if this occurs when the auxiliary underlay is removed from the sanding belt is also replaced. It connects the threads with each other and in Special cases also with auxiliary documents. With fine grain, which requires a smooth surface of the sanding belt underlay, it also contributes to the formation of such a uniform surface by filling the spaces between the threads. Finally the filling layer can also be used to form the transverse strength of the volume, especially if they Is fiber reinforced (Fig.12). Then the grain layer in conventionally applied, the filling layer at the same time can also form the basic bond for the grain.
  • FIG 5 shows the angle ⁇ (shown enlarged for illustration), which the threads form with the direction of tape travel, as well as the thread diameter d F and the thread spacing a F , which is filled on the underside by the thread binding 10 and on the top by the filling binding 11.
  • a particularly high stability of the band in diagonal and The transverse direction is obtained when one looks at the neighboring threads very intimately connected. This is possible, for example by overlapping arrangement according to FIG. 6 using Threads that have an elongated cross-sectional shape.
  • a high Longitudinal tensile strength per unit of width is obtained by multi-layer Thread arrangement as shown in Fig. 7.
  • the threads 4 of the lower layer of threads can be parallel to the Threads 4 'of the upper layer of threads run by being in the same Direction to be wound, or the threads 4 'of the upper 8, the thread layer runs antiparallel to the threads 4 the lower thread layer, for example, under the opposite same angle to the tape running direction.
  • Thread binding 10 ' may be required which is related at the same time forms the filler bond on the lower layer of thread.
  • sanding belts are predominantly under Made using thermosetting resins. These are also at the sanding belt according to the invention normally used. However, if you want to use an abrasive belt that shown in Fig Dispose of the grain separately from the rest of the layer material, for example, you switch one under the influence of energy - for example heat - variable layer one, for example from the filler layer 11 or the base bond 12 can be formed and it z. B. after heating of the sanding belt to be disposed of, the grain layer separate from the wound document component. In a The auxiliary underlay is made from a thermoplastic Material selected and the grain layer on the free side of the auxiliary pad applied so that this at the separation of the grain layer and the wound Components.
  • Fig. 9 shows a structure in which the filling bond and the Basic bond of the grain layer form a uniform layer.
  • this uniform layer is with a reinforcement by glass fibers and carbon fibers or the like equipped to increase the transverse strength of the belt.
  • Such tapes are particularly suitable for use with high transverse stress, as with a pronounced geometric Complexity of the workpieces occurs.
  • the threads 4 are in each case through a laser-welded seam 15 with the auxiliary pad connected. This forms or replaces the thread binding.
  • the Filler binding 11 also forms the basic binding 12 for the Abrasive grain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Decoration Of Textiles (AREA)
EP96930131A 1995-08-29 1996-08-29 Schleifband sowie verfahren und vorrichtung zum herstellen desselben Expired - Lifetime EP0847323B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19531774A DE19531774A1 (de) 1995-08-29 1995-08-29 Schleifband sowie Verfahren und Vorrichtung zum Herstellen desselben
DE19531774 1995-08-29
PCT/EP1996/003804 WO1997007936A1 (de) 1995-08-29 1996-08-29 Schleifband sowie verfahren und vorrichtung zum herstellen desselben

Publications (2)

Publication Number Publication Date
EP0847323A1 EP0847323A1 (de) 1998-06-17
EP0847323B1 true EP0847323B1 (de) 2000-12-06

Family

ID=7770676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96930131A Expired - Lifetime EP0847323B1 (de) 1995-08-29 1996-08-29 Schleifband sowie verfahren und vorrichtung zum herstellen desselben

Country Status (7)

Country Link
EP (1) EP0847323B1 (xx)
AT (1) ATE197924T1 (xx)
AU (1) AU6929996A (xx)
DE (2) DE19531774A1 (xx)
ES (1) ES2153977T3 (xx)
WO (1) WO1997007936A1 (xx)
ZA (1) ZA967330B (xx)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840657A1 (de) * 1998-09-05 2000-03-09 Wandmacher Gmbh & Co Awuko Sch Schleifpapier
US6780096B1 (en) 2000-06-21 2004-08-24 3M Innovative Properties Company Spiral wound abrasive belt and method
DE10141933C1 (de) * 2001-08-28 2003-05-28 Hahl Filaments Gmbh & Co Kg Schleifband
US6805722B2 (en) 2002-10-01 2004-10-19 3M Innovative Properties Company Apparatus and method for forming a spiral wound abrasive article, and the resulting article

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2294245A (en) * 1940-02-01 1942-08-25 Schlegel Mfg Co Polishing belt
US2682733A (en) * 1950-08-16 1954-07-06 Bay State Abrasive Products Co Flexible abrasive band
US2743559A (en) * 1953-04-10 1956-05-01 Bay State Abrasive Products Co Abrasive bands
AU665384B2 (en) * 1991-12-20 1996-01-04 Minnesota Mining And Manufacturing Company A coated abrasive belt with an endless, seamless backing and method of preparation
WO1995022438A1 (en) * 1994-02-22 1995-08-24 Minnesota Mining And Manufacturing Company Method for making an endless coated abrasive article and the product thereof

Also Published As

Publication number Publication date
DE59606193D1 (de) 2001-01-11
WO1997007936A1 (de) 1997-03-06
AU6929996A (en) 1997-03-19
EP0847323A1 (de) 1998-06-17
ATE197924T1 (de) 2000-12-15
ES2153977T3 (es) 2001-03-16
ZA967330B (en) 1997-03-04
DE19531774A1 (de) 1997-03-06

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