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CA2145140A1 - Banded grinder for working edges of slabs of marble, granite and the like - Google Patents

Banded grinder for working edges of slabs of marble, granite and the like

Info

Publication number
CA2145140A1
CA2145140A1 CA002145140A CA2145140A CA2145140A1 CA 2145140 A1 CA2145140 A1 CA 2145140A1 CA 002145140 A CA002145140 A CA 002145140A CA 2145140 A CA2145140 A CA 2145140A CA 2145140 A1 CA2145140 A1 CA 2145140A1
Authority
CA
Canada
Prior art keywords
main body
layer
abrasive tape
elastically deformable
deformable material
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.)
Abandoned
Application number
CA002145140A
Other languages
French (fr)
Inventor
Serafino Ghinelli
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.)
GHINES Srl
Original Assignee
GHINES S.R.L.
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 GHINES S.R.L. filed Critical GHINES S.R.L.
Publication of CA2145140A1 publication Critical patent/CA2145140A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/12Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of felted or spongy material, e.g. felt, steel wool, foamed latex

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

A banded grinder for working edges of slabs of marble, granite and the like, comprising a main body keyable on a rotary chuck and having a lateral surface which is shaped complementarily to an edge of a slab. The grinder comprises a length of abrasive tape, arranged to superpose the lateral surface of the main body, ring-wound about the main body and closed at opposite ends. The grinder further comprises a layer of elastically deformable material inpterpositioned between and adherent to the lateral surface of the main body and the length of abrasive tape and rendering the main body and the abrasive tape reciprocally solidly constrained. The layer of elastically deformable material covers the opposite ends and the cut lateral edges of the abrasive tape, incorporating both in a banded strip having a continuous abrasive surface.

Description

2 1 ~

t ., BACKGROU~JD of the INVENTION.
.. .
The invelltion relates to a bancled yrinder for workir,~ ed3-s of slabs of marbl~, 9l3nite and thc lik , compri 5i ng a main body keyable on 3 rotary - chuck, and having a 13teral surfac whicll is 05 shap-d complem~ntarily to the edge of the sl3b, and complising a tract of abrasive tape superposPd on the lateral surface of th~ main body wound 1', .;
,- about the body and ring-closed at opposite ,ends.
; In machines for shaping slab edges, grillder~ of ,; .
thc above-de~eribcd ~YPe are laryely used esp-cial1; for worlc involving rclatively little - removal of m~teli31, such as for examl~le operations of ;mootl-ing, shining and lapping of . .
-~ the edge ~urfaces.
., .
- IS In kllown processes of gril-der manufactulin~ the - abrasive tape, for example cri 5 ' -cro5~ patterlled, ~; is cut to a predetermined size before being applied on the grinder, so that the lengtll of tape ' corresponds exactly to the perimeter length of the main body, to which it will later be attached. In any casP, duG to the circularity of the grinder `- body and the deptll of the tape, as well a~ to the `j- . cutting tolerance of said tape and th- worl<

.-.;
~ . .
.~ .

.

'~

tol-ratiol-s of the yrinder body, durir79 the cutting operation a cer1ain discol1tinuity in the cutting .urfacP, in the form of a step, is mal1ife~ted at the point where the two ends of the tap^ meet 0l1 thc circu1ar body.
A pluralit~; of similar stePS is furtl1er made wher~
th,~ wor!~ surface of the glil-cler must cxhibit a cur~:ed profi le i n order to be ~ble tG work rounded edge, of tl e slab. In such cases, to permit ~ uniform contact of th~ abrasiYe tape on the latrlal surf~-7ce of the main body of the grincl~r, the 1ater31 edges of the ablasive t8~e dre cut, ~ncl when the tape i 5 stl`etChed 011 the .urface of the grincl~l bocly, Jaici cdges disl:ance one from the other circumferentia11y thereon, crec7ting a series of furtl1el step-il1terruptions , "
;,;' arrc7llged ~long the peripl1ery of the grind-r.
Both the step at the ends of the tape, caused either by excessive 1ength or by excessive ~,,:
;~ 20 shortness of the tape, and the lateral edge step3 are the cause of considerable drawbacks, manifested especia11y during working of a corner where two contiguous slab edges meet; the gaps ' caused by the steps are invaded by the s1ab edges . ~.
~ 25 and the involved portion of tape can be torn.
. _ ~ _ ,~

:'`,~
c .; ~
,, -- .
. ".
;;,~,;

21451~0 The above drawbacl(s, apart from rend~ring the grindr-r unusabl~--, with obvious resulting economic ~- disadvantag~as, imply the higl)-speed proj-ction of i t3p~ p31`ti~l~5 ~311 alound the work ar~a, P1aC jng 05 the grincler opr-r3tor in somr-- d~nger, unle ~s s3f-~ty precAutions ara tal<en.
The aim of the present invention, 35 it i~
~-- charactelized in the claims that follow, is to ~; el iminatf thr- abovf7-mention5ci drawbacks in the , ., ~: lO prior art by totally rPmoving the disconti~uities ~- in th~ edges of the abra_ive tape due to the positioning of same on the main body of the glinder.
. . , ~ . ~
_J SUMMARY Of the INYENTIN-- - .., , ~ , .
.~...................... Th-- zbova result is obtained by the invention by ^. .
:~ 15 mPans of a banded grinding whe~l for working edges :- Gf _labs of marble, granite and the lilce, which . wheel comprises a layer of elastically deformable ~; ~
material intPrpositioned between and adherent to . ~ the lateral surface of the main body of the J~ - 20 grinder and to the length of abrasive tape ring-.1,,, ~
wound on said body, such that said tape and said . . ~ . , ~
~ body are rendaread reciprocally solid.
. ~ .;.

, ,-, . 1, ~,:, ~' . . ~ ~

The layer of elastically deform3ble materialcoverJ the opposite ends of thc length of abra~ive tape, such that the lateral edges t:hereof are incorporatrd in a banded ~.trip having a continuous abrasive ~urfac~.
The fundarm-ntal advantage of the grilldFr rraliz-d accordina to the inventiol, con~ist~ e~sentially in .
a greater grinder working life, result;ng in considerable economic s,3vings.
Furth~r, the above-described grinders are much safer and more reliable in a worl< -nvil-~onment with :
regard to the safety of the opFrator.

--! BRIEF DE~CRIPTION of the DRAWINGS.
:. i , . . .

j Further charact~ristics and advantages of the -:: pre_ent invention will better emerg from the .
s l5 detailed description that follows, of an ., . ~
embodiment of the invention, illustrated in the :~ form of a non-limiting example in the accompanying ~ ..
drawings, in whîch:

~ figure 1 shows a lateral tota1 view of a grinder - ~ 20 according to the invention;
. . . ~ .
".~ figure 2 is a later31 total r~presentat;on of a : . ~, . .
;-,;- grinder according to the inv~ntion seen at the ;.. ~
~,.. .
- :, " .;

., . , ~ .
~ .

junction area of the opposite ends of the abrasive tape;
S figure 3 is a partial axial section of the grinder of figure 1;
figure 4 is a perspective view of an abrasive tape used for the grinder of the previous figures;
figure 5 is an exploded perspective view of parts which can be used to make up a grinder according to the invention;
figure 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 61 and 6m are examples of slab edges obtained using the invention;
With reference to the figures, the invention essentially comprises a banded grinder 10 for working an edge 4 of a slab 5 of marble, granite and the like.
The grinder 10 comprises a main body 1 made in metal and axially keyable on a rotary chuck 2 and having a lateral surface 3 shaped complementarily to the edge 4 of a slab 5.
The grinder 10 comprises a tract of abrasive tape 6 superposed on a lateral surface 3 of the main 21~514~

; body 1 and ring-wound thereon, and closed at opposite ends 7 of said ,3brasive tape 6.
~we~l7 ~aid al-,rasivr- tape 6 and said 1atel`3l surface 3 of tl~ main body 1 ~see figure 3), .3 05 la~l~ 11 of clastically deformable material, rnacl-ot rubber or an ._l,~stomer having like Ch31`aC~ tiC~, i5 interpositioned. Thi_ layeu~ ll adhereJ both to the lat u~31 surface 3 of the main ; body l alld to tlle abrasive tape 6 such th3~ said lo main body 1 and said abras-ive tape 6 are r;ndr-red 501 i~ll y r~_cipl-~oc~311 y col~_tr~ail~ed.
The layer 11 of elastically deformable material covers the opposite ends 7 of the abrasive tape 6, incorporating them in a banded strip 12 proYided with a continuous abrasive surface 16 (see figure . 2).
Figure 4 shows how the abrasive tape 6, before the final construction of the grinder 10, ;5 provided with a plurality of cuts 20 made at 1ateral edges 9 thereof and having the aim of creating an optimal adaptation of the lateral surface 3 of the main body 1 of the grinder 10 when said main body 1, as shown in figures 1, 2 and 3, exhibits curved generatrices shaped complementarily to the edge 4 of the slab 5.

' -21~51~0 -The layer 11 of el,3stically deformable material, in this case, covers also the cut lateral edges 9 of the strip of abrasive tape 6, incorporating said cut lateral edges ~ into the banded strip 1 05 and cr.3ting a continuous surface thereof.
With reference to figure 5, a grinder 10 according to the in~ ntion can be obtained with a procedure utilizing parts as schematically represented in the fi~ure and constituted by the following operativ phases: , - po~itioning of at least one length of abrasive tape ~ on an internal surface 13 of heated half dies 14 and 15, which internal surface 13 is shapcd complementarily to the lateral surface 3 of ~aid main body 1;
- spreading of a layer 11 of elastically deformable material in semi-liquid state Oll the lateral surface 3 of the main body l, which layer subsequently adheres to said lateral surface 3;
- closure of the two half-dies 14 and 15 about the main body 1, such that the abrasive tape 6 sinlcs into the layer 11 of elastically deformable material;
- solidification of the layer 11 of elastically deformable material with consequent intimate 21~51~D

: connection of the abrasive tape (63 and the la~er 11 of elastically deformable material.
The above-described proce3s utilizes a layfr 11 of vulcanized rubber, and can be substituted with 05 equivalent re~ult3 and similar equipmellt using a ~ conventiollal injection process of the material to : be us.-d for the layer 11.
The invention is susc~ptibl-- to numerous variatîons and modification~, all entering within th~ field of the inventive concept, which concept is herein related to specific examples of an embodiment of 3 grinder 11, as shown in figures 1, 2 and 3. The grinders realizable according to the present invention can, however, exhibit variou~
geometrical shape~ and sizes for realizing, for example, convex ~-dges, concave edges and/or mixed-shape edges, som~ of which are illustrated in figure 6.

Claims (5)

1. A banded grinder for working edges of slabs of marble, granite and the like, comprising a main body keyable on a rotary chuck, and having a lateral surface which is shaped complementarily to an edge of a slab, and comprising a length of abrasive tape superposed on the lateral surface of the main body and wound about said main body and ring-closed thereupon at opposite ends of said abrasive tape; further comprising a layer of elastically deformable material interpositioned between and adherent to the lateral surface of the main body and to the abrasive tape such as to render said main body and said abrasive tape reciprocally solidly constrained, said layer of elastically deformable material covering at least said opposite ends of the length of abrasive tape and incorporating said opposite ends to give rise to a banded strip exhibiting a continuous abrasive surface.
2. A grinder as in claim 1, wherein said length of abrasive tape exhibits cut lateral edges, and wherein that said layer of elastically deformable material covers said length of abrasive tape incorporating said cut edges into said banded strip.
3. A grinder as in claim 1, wherein said layer of elastically deformable material is constituted by rubber.
4. A grinder as in claim 1, wherein said layer of elastically deformable material is constituted by an elastomer.
5. A process for realizing the grinder of claim 1, comprising the following phases:
- a positioning of at least one length of abrasive tape on an internal surface of heated half dies, which internal surface is shaped complementarily to the lateral surface of said main body;
- a spreading of a layer of elastically deformable material in a semi-liquid state on the lateral surface of the main body, which layer subsequently adheres to said lateral surface;
- a closure of the half-dies about the main body, such that the abrasive tape sinks into the layer of elastically deformable material;
- a solidification of said layer of elastically deformable material with a consequent intimate connection of said abrasive tape and said layer of elastically deformable material.
CA002145140A 1994-05-23 1995-03-21 Banded grinder for working edges of slabs of marble, granite and the like Abandoned CA2145140A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITB094A000241 1994-05-23
IT94BO000241A ITBO940241A1 (en) 1994-05-23 1994-05-23 STRATIFIED CONSTITUTION WHEEL FOR WORKING THE EDGES OF MARBLE, GRANITE AND SIMILAR SHEETS

Publications (1)

Publication Number Publication Date
CA2145140A1 true CA2145140A1 (en) 1995-11-24

Family

ID=11339847

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002145140A Abandoned CA2145140A1 (en) 1994-05-23 1995-03-21 Banded grinder for working edges of slabs of marble, granite and the like

Country Status (6)

Country Link
EP (1) EP0688635B1 (en)
CA (1) CA2145140A1 (en)
DE (1) DE69509303T2 (en)
ES (1) ES2132584T3 (en)
IT (1) ITBO940241A1 (en)
SI (1) SI0688635T1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6120569A (en) * 1998-09-23 2000-09-19 Kuo; Ching-An Method for production and structure of stone pattern processing mills
WO2008035383A1 (en) * 2006-09-20 2008-03-27 Mauro Di Mattia Device having inserts for working hard stones and the like
FR2968587B1 (en) * 2010-12-10 2014-04-11 Snecma ABRASIVE BRUSH WITH CONCAVE SIDE SURFACE
CN111451869A (en) * 2020-05-08 2020-07-28 吴学彪 Card chip processing equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3313650C2 (en) * 1983-04-15 1987-01-15 Reich Spezialmaschinen GmbH, 7440 Nürtingen Device for producing a profile grinding wheel
ATE53324T1 (en) * 1986-04-17 1990-06-15 Carborundum Schleifmittel PROCESS FOR MANUFACTURING AN ELASTIC ABRASIVE BODY.
IT1202644B (en) * 1987-03-06 1989-02-09 Pierluigi Ravelli ABRASIVE WHEEL FOR SHAPING AND SURFACE FINISHING OF STONE MATERIALS OF THE MARBLE, GRANITE AND SIMILAR TYPE
IT232262Y1 (en) * 1993-09-24 1999-12-17 Quintilio Lupi ELASTIC BASE WHEEL FOR SANDING AND POLISHING TOROIDAL PROFILES IN HARD MATERIALS.

Also Published As

Publication number Publication date
DE69509303D1 (en) 1999-06-02
ES2132584T3 (en) 1999-08-16
EP0688635A1 (en) 1995-12-27
ITBO940241A0 (en) 1994-05-23
EP0688635B1 (en) 1999-04-28
DE69509303T2 (en) 1999-11-04
ITBO940241A1 (en) 1995-11-23
SI0688635T1 (en) 1999-10-31

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Legal Events

Date Code Title Description
FZDE Discontinued