EP2588274A1 - Tool support with a reinforcement of jute fibers, and an injection molding method for producing such a tool support - Google Patents
Tool support with a reinforcement of jute fibers, and an injection molding method for producing such a tool supportInfo
- Publication number
- EP2588274A1 EP2588274A1 EP11728591.6A EP11728591A EP2588274A1 EP 2588274 A1 EP2588274 A1 EP 2588274A1 EP 11728591 A EP11728591 A EP 11728591A EP 2588274 A1 EP2588274 A1 EP 2588274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool carrier
- granules
- tool
- injection molding
- fibers
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 66
- 240000000491 Corchorus aestuans Species 0.000 title claims abstract description 40
- 235000011777 Corchorus aestuans Nutrition 0.000 title claims abstract description 40
- 235000010862 Corchorus capsularis Nutrition 0.000 title claims abstract description 40
- 238000001746 injection moulding Methods 0.000 title claims abstract description 26
- 230000002787 reinforcement Effects 0.000 title description 10
- 239000008187 granular material Substances 0.000 claims abstract description 56
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 20
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 20
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 5
- -1 polypropylene Polymers 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 4
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000003380 propellant Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000008092 positive effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 244000198134 Agave sisalana Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 206010041662 Splinter Diseases 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000002666 chemical blowing agent Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 230000003763 resistance to breakage Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- 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
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
- B24D13/04—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising a plurality of flaps or strips arranged around the axis
-
- 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
- B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips
-
- 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
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
- B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/16—Bushings; Mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/16—Bushings; Mountings
-
- 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
Definitions
- the invention relates to a dimensionally stable and rotationally symmetrical reinforced with natural fibers tool carrier, which is connectable to a rotary drive and which has at least one tool support surface for receiving at least one grinding and / or polishing element, said tool carrier produced by means of an injection molding using granules is.
- the invention further relates to an injection molding process for producing such a tool carrier, wherein initially granulated plastic and then injected under pressure into a shaping cavity.
- a tool carrier of the type in question is known from EP 1 105 252 B1 of the same applicant.
- Such a tool carrier serves to receive at least one grinding and / or polishing element.
- Various embodiments of such a tool carrier are explained below in connection with the figures.
- fiber reinforcement a reinforcement by fibers (fiber reinforcement), wherein the fibers are solidified by a binder or by a matrix material or in this are involved.
- the fibers are natural fibers made from renewable raw materials.
- a tool carrier known from EP 1 105 252 B1 is produced in an injection molding process, wherein the material or the material is provided in the form of granules and this granules already contains the essential constituents of natural fibers and matrix material.
- the production by means of granules has proven itself and is particularly simple and inexpensive.
- An object of the invention is to improve the mechanical properties of a tool carrier of the above type without adversely affecting its manufacturability.
- This object is achieved with a tool carrier according to the invention, which is using granules, which comprises jute fibers and thermoplastic matrix material and a Jutefaseranteil of 20 to 35 wt .-%, is available.
- This object is further achieved by an injection molding method according to the invention for producing a tool carrier, in which the granules comprise jute fibers and thermoplastic matrix material and has a jute content of from 20 to 35% by weight.
- granules is used as a synonym for starting materials that are present in particulate form and can be further processed by injection molding to the final product.
- the term granules may stand for one type of granulate, but also for the combination of several types of granules.
- Crucial in the use of granules is that the starting materials are not mixed as raw materials, but already preprocessed in particulate form, so for example in the form of grains, pellets or flakes, the injection molding process.
- Under jute fibers bast fibers are understood to have a bundle structure whose fiber bundle lengths (short and long fibers) can be set variably depending on the application.
- the jute fibers For processing by injection molding, the jute fibers must have a good bond to the thermoplastic matrix material.
- Particularly preferred are jute fibers of the "Hessian warp” or “Hessian weft” type, in their usual meaning in the corresponding specialist circles.
- a tool carrier according to the invention has improved mechanical and thermal properties. These are z. B. a very high flexural strength and impact resistance with an equally given elasticity, these properties being maintained even at higher temperatures. Depending on the proportion of jute fibers as reinforcement of the thermoplastic matrix material, the elasticity and flexibility of the tool carrier can be adjusted over its entire surface. An over its entire surface flexible tool carrier allows an application at high speeds. Due to the stability and high elasticity of the tool holder gains the necessary for the use of fracture safety. Furthermore, a tool carrier according to the invention has a splinter-free fracture behavior and thus offers a high resistance to fracture, which is constant over the entire tool carrier.
- thermoplastic matrix material polyvinyl chloride, polyetheretherketone, polyethylene terephthalate, polycarbonate, acrylonitrile butadiene Styrene, polylactate, polymethyl methacrylate, polyacrylonitrile, polyamides, polyesters or polyacrylates, more preferably polyethylene, polypropylene or polystyrene, or mixtures thereof.
- an adhesion promoter such as maleic anhydride, silane, polyvinyl alcohol or polyvinyl acetate, add.
- Aramid fibers and polyacrylonitrile fibers are high-performance fibers which have a high tensile strength, which can have a positive effect on the mechanical properties of the tool carrier to be produced.
- these fibers are provided with a fiber length between 4 and 10 mm.
- the fibers may be added as a raw material to the granules before the injection molding or initially processed into granules and then injection molded together with the other granules.
- fillers or auxiliaries can be added to the granules in raw material or granular form.
- Fillers may consist of natural fibers such as hemp fibers, flax fibers, kenaf fibers, bamboo fibers, coconut fibers, cellulose fibers, cotton fibers, sisal fibers or wood fibers.
- pellets or flakes In order to obtain a free-flowing molding composition for the injection molding process, it is expedient to provide the granules in the form of pellets or flakes.
- the pellets may be spherical or cylindrical.
- a preferred development is pellets containing compressed thermoplastic matrix material, jute fibers and optionally additional substances, such as a bonding agent and / or other fibers.
- the dimensionally stable and rotationally symmetrical reinforced with natural fibers tool carrier can be formed for example as a mop, roller-like and solid trained tool carrier or as a support plate for grinding and / or polishing.
- the tool carrier is pronounced as a circular disk-shaped support plate for grinding and / or polishing elements.
- the use of jute fibers as a reinforcing fiber of a thermoplastic matrix material is particularly advantageous for backup plates, because they are exposed to high mechanical and thermal loads.
- the support plate thickness is constant in the axial direction over the entire support plate.
- the reinforcement with jute fibers has a positive effect on the mechanical properties (eg flexural rigidity, resistance to breakage and impact resistance), so that the backing pad does not have to be made thicker, as usual, at particularly heavily loaded areas.
- a support plate thickness in the axial direction between 3.8 cm and 4.5 cm, more preferably between 4.2 cm and 4.3 cm, has a positive effect on the mechanical properties at a low cost of materials.
- the backing pad has a step offset region which is planar and parallel to a tool support surface, the thicknesses of the tool support surface and the offset region being equal. Due to the reinforcement with jute fibers, which has a positive effect on the mechanical properties, the entire backing pad, even in the staggered area, can be manufactured with a constant thickness.
- the reinforcement of the support plate with jute fibers also has the advantage that the support plate has a low weight of, for example, 35 to 45 g with a diameter of 105 to 120 mm. This facilitates the handling of the support plate in tool operation.
- granules containing a (preferably black) dye content of 1 to 2 wt .-% may be incorporated into the granules comprising jute fibers and thermoplastic matrix material, or may be present as granules (for example in the form of a masterbatch).
- the dye in the form of color pigments or powder can be admixed with the proportion of 1 to 2% by weight of the granules for the injection molding process.
- Injection-molded tool carriers usually have very smooth surfaces, with low roughness. In order to facilitate the handling of the tool carrier, for example when loading or replacing, it is advantageous that at least one surface of the tool carrier between stage 30 and 36, preferably stage 31, (according to VDI Guideline 3400) is eroded.
- a preferred development is formed with a tool support surface, in which a grid is impressed.
- the grid lines which are preferably perpendicular to each other, leave areas that have a square base area and run upwards in a pyramid shape.
- the adhesive can run between the pyramidal raised areas in the lower lying grid lines (channels) and thus improve the adhesive performance.
- the free-flowing granulate is first melted by passing it through a mass funnel of a rotating and heated snail is supplied. If the pad formed before the screw tip of molten granules sufficient to create the tool carrier, the screw rotation is stopped, the screw advanced and thereby pressed the melt under pressure in a usually tempered tool.
- the granules include jute fibers and thermoplastic matrix material and has a jute content of 20 to 35 wt .-%.
- the granules are pellets or flakes and contains the thermoplastic matrix material polypropylene, polyethylene or polystyrene.
- the granules which contains at least jute fibers and thermoplastic matrix material, are melted during the injection molding process, the jute fibers generally turn brownish.
- titanium dioxide may be in powder form.
- the titanium dioxide is pre-processed into granules and can be used together with the other granules for injection molding.
- the tool carrier thus produced has a foam core, which is surrounded by a compact and stable outer skin, whereby the weight of the tool carrier is reduced.
- a gas nitrogen, for example
- the propellant decomposes, releasing a gas (nitrogen, for example) that mixes with the granules.
- a gas in the tool can be pressurized prior to injecting the molten granules.
- the molten granules displace the gas from the tool, while the gas pressure is readjusted accordingly.
- the granules contain a dye content of 1 -2 wt .-%, so that the finished tool carrier are color differentiated from each other.
- the dye is particularly preferably black and is either a further constituent of the granules, which comprises at least jute fibers and thermoplastic matrix material, or is admixed as color granules to the other granules.
- the dye may be added in pigment or color form with a proportion of 1 -2 wt .-% of the granules during the injection molding process.
- At least one Roughen surface preferably the back, of the tool carrier.
- a thermal removal method preferably by erosion, a rough structure (level 30 to 36 according to VDI Guideline 3400) of the surface is set.
- FIG. 1 shows a tool carrier according to a first embodiment.
- FIG. 2 shows a tool carrier according to a second embodiment
- FIG 3 shows a tool carrier according to a third embodiment in plan view.
- FIG. 4 shows a tool carrier according to the third embodiment in side view.
- FIG. 5 shows a tool carrier according to the third embodiment along the section line V-V according to FIG. 3.
- Fig. 1 shows a tool carrier according to a first embodiment, a so-called Schleifmop 1 1, which has a solid cylindrical tool carrier 15, with a fiber reinforcement by Jutemaschinen 31 and with radially arranged grinding elements 1 7 in the form of abrasive slats.
- an axis 19 is inserted centrally, via which the grinding mop 1 1 is connected to a rotary drive.
- the tool support surface 21 is the lateral surface of the cylindrical tool carrier 15, with the grinding elements 17 being received by or attached to this lateral surface and projecting radially therefrom.
- the grinding elements 1 7 are omitted for the purpose of better illustration to illustrate the jute fibers 31 in the area of the tool support surface 21. Furthermore, here a partial area is shown broken away in order to illustrate the jute fibers 31 in the interior of the solidly formed tool carrier 15.
- Fig. 2 shows a roller-like and solid trained tool carrier 23, on the tool support surface 25 in the working mode an endless grinding or polishing belt 27 rolls.
- the grinding element, ie, the endless grinding belt 27, of the tool support surface 25 is not as in the embodiment shown in FIG. 1 by a fabric closure or form fit (this includes a Velcro fastening or the like), but essentially by a frictional connection (Friction) recorded.
- the tool carrier 23 has an axial opening 29 which serves to connect to a rotary drive, not shown.
- a section of the also containing jute fibers 31 tool carrier 23 is again shown broken up to illustrate the distributed here in the interior of the solid tool carrier 23 Jutemaschinen 31.
- a flapper disc 1 which consists of a support plate 7 and 5 sanding elements, wherein the grinding elements 5 are formed in the form of grinding blades and received by a tool support surface 9 of the support plate 7 and secured thereto.
- the support plate 7 is circular disk-shaped and has a hollow-cylindrical opening 3 in the center of the circle, which serves to connect the flapper disc 1 with a rotary drive (not shown).
- the tool support surface 9 has no smooth surface, but has a (not shown) grid-shaped pattern, which is embossed in the surface. By the resulting areas (perpendicular grating lines) more adhesive can be added and the adhesive bond with which the grinding elements 5 are fixed to the tool support surface 9, is stronger.
- a fiber reinforcement of jute fibers having a length in a range of 2 to 4 mm, preferably 3 mm.
- the jute fibers are shown schematically and designated 31.
- some grinding elements to illustrate the jute fibers 31 in this area.
- a partial area is shown broken up in order to also illustrate the jute fibers 31 homogeneously distributed in the interior of the support plate 7.
- the incorporated jute fibers 31 cause a very high bending stiffness and impact resistance with an equally given elasticity.
- temperature-dependent properties in particular the temperature stability, are also improved.
- Fig. 4 shows a side view of the support plate 7 of FIG. 3, which has on the front side 43, the flat tool support surface 9 for receiving the grinding elements 5, not shown here.
- the support plate 7 On the back 45, the support plate 7 has a so-called Flanschbuckel 47, which serves to receive a flange, thread or threaded flange (not shown).
- FIG. 5 the cross section of the support plate 7 along the section line VV of FIG. 3 is shown.
- the flat tool support surface 9 is annular with a ring width of preferably 25.67 mm. It encloses a region 41 offset from the plane of the tool support surface 9 by a step of height t, the height t being 3.5 mm in the illustrated example.
- the region 41 is flat and formed parallel to the tool support surface 9 and is lowered with respect to the tool support surface 9 in the direction of the rear side 45 of the support plate 7.
- the offset portion 41 forms the flange boss 47, as shown in FIG.
- the bottom 53 of the area 41 is flat and parallel to the tool support surface 9 and has a hollow cylindrical opening 3.
- the diameter of the bottom 53 is 45.24 mm and the diameter of the opening 3 is 22.3 mm.
- the central opening 3 may have a flange (not shown) or a thread to connect a drive shaft of a drive machine with the support plate 7. Alternatively, a threaded flange can be used, which then comes to rest on the bottom 53 of the area 41.
- the walls 51 of the offset portion 41 are inclined with respect to the bottom 53 and form rounded transitions between the bottom 53 of the portion 41 and the tool support surface 9.
- the radius R1 of the curves between the bottom 53 and walls 51 of the portion 41 on the Front 43 of the support plate 7 preferably 10, 6 mm, on the back 45 of the support plate 7, the radius R2 is preferably 10 mm.
- the radius R3 of the rounding between the walls 51 of the region 41 and the tool support surface 9 on the back 45 of the support plate 7 is 15 mm.
- the thickness d of the entire support plate 7, that is to say the thickness of the annular tool support surface 9, the walls 51 and the bottom 53 of the region 41, is 4.4 mm.
- the total support plate height h is then the sum of the thickness d of the support plate 7 and the height t of the step by which the region 41 is offset from the tool support surface 9.
- the diameter of the support plate 7 is 116.5 mm.
- the entire back 45 of the support plate 7 is roughened by erosion according to VDI Guideline 3400 Level 31 (not shown).
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010025499 | 2010-06-29 | ||
DE102010025498 | 2010-06-29 | ||
DE102011102107 | 2011-05-20 | ||
PCT/EP2011/003174 WO2012000647A1 (en) | 2010-06-29 | 2011-06-28 | Tool support with a reinforcement of jute fibers, and an injection molding method for producing such a tool support |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2588274A1 true EP2588274A1 (en) | 2013-05-08 |
EP2588274B1 EP2588274B1 (en) | 2022-02-02 |
EP2588274B8 EP2588274B8 (en) | 2022-04-27 |
Family
ID=44584108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11728591.6A Active EP2588274B8 (en) | 2010-06-29 | 2011-06-28 | An injection molding method for producing a tool support with a reinforcement of jute fibers |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2588274B8 (en) |
WO (1) | WO2012000647A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103551982A (en) * | 2013-11-08 | 2014-02-05 | 谢泽 | Compression-molded flat wheel comprising gridded sisal hemp back cover |
ITRE20130086A1 (en) * | 2013-11-15 | 2015-05-16 | Giovanni Ficai | DEPRESSED CUTTING WHEEL |
BR112016027187B1 (en) | 2014-05-29 | 2022-04-12 | Saint-Gobain Abrasives, Inc. | Abrasive article with a core including a polymer material, abrasive wheel and their method of preparation |
DE102016002400A1 (en) | 2016-02-29 | 2017-08-31 | Gerd Eisenblätter Gmbh | Grinding wheel and carrier plate for it |
DE102016002401A1 (en) | 2016-02-29 | 2017-08-31 | Gerd Eisenblätter Gmbh | Grinding wheel and carrier plate for it |
DE102020134019A1 (en) | 2020-12-17 | 2022-06-23 | Klingspor Ag | Abrasive mop and method of making such an abrasive mop |
EP4098401A1 (en) * | 2021-06-01 | 2022-12-07 | Hilti Aktiengesellschaft | Grinding disc for grinding wheel of grinding machine and method of manufacturing the same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202004004027U1 (en) * | 2004-03-12 | 2005-07-28 | RHODIUS Oualitätsschleifmittel GmbH & Co KG | Flap disc |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4078340A (en) * | 1973-12-07 | 1978-03-14 | Minnesota Mining And Manufacturing Company | Low density abrasive pad having different abrasive surfaces |
US5316812A (en) * | 1991-12-20 | 1994-05-31 | Minnesota Mining And Manufacturing Company | Coated abrasive backing |
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DE202004004027U1 (en) * | 2004-03-12 | 2005-07-28 | RHODIUS Oualitätsschleifmittel GmbH & Co KG | Flap disc |
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Also Published As
Publication number | Publication date |
---|---|
WO2012000647A1 (en) | 2012-01-05 |
EP2588274B1 (en) | 2022-02-02 |
EP2588274B8 (en) | 2022-04-27 |
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