EP0187624A2 - Bandschleifmaschine für durchbrochene Holzplatten - Google Patents

Bandschleifmaschine für durchbrochene Holzplatten Download PDF

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Publication number
EP0187624A2
EP0187624A2 EP85830224A EP85830224A EP0187624A2 EP 0187624 A2 EP0187624 A2 EP 0187624A2 EP 85830224 A EP85830224 A EP 85830224A EP 85830224 A EP85830224 A EP 85830224A EP 0187624 A2 EP0187624 A2 EP 0187624A2
Authority
EP
European Patent Office
Prior art keywords
belt
insert
sand
pressure member
flexible
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.)
Withdrawn
Application number
EP85830224A
Other languages
English (en)
French (fr)
Other versions
EP0187624A3 (de
Inventor
Vittorio Tassoni
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.)
DMC SpA
Original Assignee
DMC SpA
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 DMC SpA filed Critical DMC SpA
Publication of EP0187624A2 publication Critical patent/EP0187624A2/de
Publication of EP0187624A3 publication Critical patent/EP0187624A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts

Definitions

  • This invention relates to a belt sander for open-work wood panels, of a type which comprises, carried on a frame, an endless sand belt trained around a plurality of wheels at least one of which is a driving wheel, said belt having a working run which extends above and spaced apart from a conveyor table for a panel to be processed, and at least one pressure member acting on the working run of said sand belt to press it toward said conveyor table.
  • the breadth of the sand belt area at work on the panel is adjusted by varying the number of the pressure members acting on the sand belt.
  • the problem underlying this invention is that of providing a sander which is designed, both construction- and function - wise, to obviate such prior shortcomings, that is, a sander wherein the breadth of the working area of the sand belt in engagement with a panel to be sanded can be adjusted to a very fine degree, and in the extreme, even continuously.
  • the solut ⁇ ve idea of the problem is one of apportioning in an adjustable manner the pressure member area actively affecting the working run of the cited sand belt irrespective of the size of the pressure members.
  • a machine characterised in that it comprises an insert of a set thickness extending in the same direction as said sand belt, over a set length, and being guided between said sand belt and said at least one pressure member, and a means of fitting said insert to an adjustable position between said sand belt and said at least one pressure member, to bring a section of the working run of said sand belt closer to said conveyor table and bound a working area thereof at that section of said belt where said insert is interposed between it and said at least one pressure member.
  • a sander machine generally indicated at 1, comprises a frame 2 of the portal type, a belt conveyor table 3 mounted on vertically adjustable jacks 4 and having a substantially horizontal work surface 3a which extends longitudinally through the frame 2, and a sand belt surfacing unit, generally indicated at 5 which is supported on the frame 2 above the conveyor table 3.
  • the unit 5 includes a train of four wheels, indicated at 6a,6b,7a and 7b, having parallel axes laid in the longitudinal direction of the conveyor table 3.
  • the wheels 6a,6b are mounted on the frame 2 on opposed sides of the conveyor 3, and one of them would be a power driving wheel.
  • the wheels 7a,7b are mounted at an intermediate, preferably middle, location between the wheels 6a,6b, and their distance from the work surface 3a of the conveyor is adjustable.
  • a belt 8 In closed loop configuration around the wheels 6a,6b,7b is a belt 8, called the "running" belt, which forms a supporting and entraining member for a sand belt 10 overlying it and being, in turn, configurated as a closed loop around the wheels 6a,6b,7a; both belts, 8 and 10, extend crosswise to the conveyor table 3.
  • the sand belt 10 has a working run 10a facing the work surface 3a of the conveyor table 3, in spaced-apart and parallel relationship therewith.
  • a plurality of pressure members 12 are mounted stationary on the frame 2 to confront the belt 8 at the working run 10a of the sand belt 10.
  • Said pressure members 12, which are of substantially conventional type, are each provided with an actuator 13, such as an air-operated jack, and a shoe 14 driven by said actuator to press, on activation, the belt 8, and hence the belt 10, toward the work surface 3a of the conveyor table 3.
  • an actuator 13 such as an air-operated jack
  • a shoe 14 driven by said actuator to press, on activation, the belt 8, and hence the belt 10, toward the work surface 3a of the conveyor table 3.
  • a subframe 15 is rigid with the frame 2 on the inside of the loop formed by the belt 10 and at the working run 1 0a thereof.
  • the subframe 15 comprises a beam 16 extending in the direction of the sand belt 10 and provided, as its opposed ends, with respective heads, 17 and 18.
  • Each head, 17-18, carries a plurality of idler rollers 20 arranged with their axes parallel to one another and to form respective curved guides 21 and 22 with facing concave sides.
  • Trained around the guides 21, 22 is a flexible endless belt element 23 having a first run 24 which extends between the shoes 14 and belt 8, and a second run 25, juxtaposed to the first and fastened to a slide 27 by means of clamps 26.
  • the slide 27 is mounted slidably along a straight runway 28 which is attached, as by studs 29, to the beam 16 in parallel relationship therewith.
  • the sprocket 31 is rotatively rigid with a hand-wheel, not shown, accessible from outside the frame 1.
  • an insert 40 of a set thickness which extends over a shorter length than the linear extension of said element 23 and slightly longer length than said runs 24,25 thereof.
  • the insert 40 is formed of a plurality of pads 41 in a row, which are fastened to the flexible element 23, on the outward side of the loop formed thereby.
  • an anti-friction belt 42 such as a graphitized cloth belt, with its opposed ends attached to the heads 17 and 18.
  • the insert 4 0 is introduced in between the shoes 14 and anti-friction belt 42 in the opposite direction to the direction of movement of the sand belt 10 (arrow A in Figure 2).
  • the foremost shoe in the row at the working run 10a of the belt 10 has a working surface 45 facing said belt and sloping to diverge from the running belt 8 in the direction of the arrow A.
  • That sloping working surface additionally to forming a lead-in for introducing the insert into the space between the shoes 14 and antifriction belt 42, defines the start of a sanding area, indicated at B in Figure 2, in which the belt 10 engages operatively with a portion of a panel 50, as explained in detail hereinafter.
  • the panel 50 comprises, in the example shown in Figure 3, a peripheral frame formed of a pair of uprights 51 a and 51 b, and a corresponding pair of cross-pieces 52a and 52b.
  • the uprights and cross-pieces are mutually connected at right angles and surround a center portion 53 of the panel 50.
  • the panel 50 is placed on the worksurface 3a of the conveyor table 3 and fed toward the surfacing unit 5 along a perpendicular direction to the plane of the sheet in Figures 1 and 2.
  • the panel 50 is registered against a straight detent 55 laid along one side of the conveyor table 3 and shiftable over the surface 3a thereof transversely to the feeding movement of the panel 50 by means of screw adjustment members 56.
  • the panel 50 is brought to a position below the surfacing unit 5 which is preset and adjustable relatively to the latter.
  • the panel 50 Upstream of the machine 1, the panel 50 has been subject to a surfacing treatment either over its entire surface or limited to the uprights 51 a, 51 b or the cross-pieces 52a, 52b alone.
  • the detent 55 would be positioned such that the trailing end of the working area B in the direction of the arrow A is brought to coincide with the line of joint between said cross-pieces and the upright 51 a.
  • the working area B should be adjusted to have the same dimension as the cross-pieces.
  • the sprocket 3 1 is turned, thereby the chain 30 is pulled to provide a like displacement of the slide 27 on the runway 28.
  • the flexible belt element 23 is also shifted by an equal amount whose runs 24 and 25 would be respectively released and taken up (or vice versa) according to the direction of movement of said slide 27.
  • the slide 27 is moved in the direction of the arrow A in Figure 2, a progressive introduction of the insert 40 into the space between the shoes 14 and belt 8 is obtained, thereby the breadth of the sanding area B is increased.
  • the element 23 functions also a means of introducing the insert 40 to an adjustable position between the sand belt 10 and pressure members 12.
  • the sanding area will be bounded by a start position B, which is fixed relatively to the frame 2 and defined by the working surface 45 of the leading shoe 14, and an end position B, which is variable and corresponds substantially to the position of the end of the insert 40 between the shoes 14 and anti- friction belt 42.
  • the net effect is one of apportioning the area of the pressure member affecting the area B, of the end sanding in an adjustable manner.
  • the plurality of pressure members 12 In sanding the cross-piece 52b, for example, the plurality of pressure members 12 would be lowered as a whole toward the conveyor table 3, but only some of them, specifically those overlying the insert 40, would become active on the belt 10 to confine its sanding area B.
  • the sander of this invention solves the problem set forth and achieves a number of advantages, among which great constructional simplicity, just as high reliability in operation, and a degree of accuracy within the sanding area B on the order of one millimeter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP85830224A 1984-11-30 1985-09-09 Bandschleifmaschine für durchbrochene Holzplatten Withdrawn EP0187624A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2382484 1984-11-30
IT23824/84A IT1178654B (it) 1984-11-30 1984-11-30 Macchina levigatrice a nastro abrasivo per panelli in legno con telaio a vista

Publications (2)

Publication Number Publication Date
EP0187624A2 true EP0187624A2 (de) 1986-07-16
EP0187624A3 EP0187624A3 (de) 1988-07-20

Family

ID=11210234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85830224A Withdrawn EP0187624A3 (de) 1984-11-30 1985-09-09 Bandschleifmaschine für durchbrochene Holzplatten

Country Status (3)

Country Link
EP (1) EP0187624A3 (de)
ES (1) ES8701003A1 (de)
IT (1) IT1178654B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007031066A1 (de) * 2005-09-12 2007-03-22 Lissmac Maschinenbau Und Diamantwerkzeuge Gmbh Vorrichtung zum entgratenden oder abschleifenden bearbeiten eines band- oder plattenförmigen metallischen werkstücks
DE102009055974A1 (de) * 2009-11-27 2011-06-01 Lissmac Maschinenbau Gmbh Bearbeitungsstation und Vorrichtung zum Bearbeiten eines Werkstücks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116810583B (zh) * 2023-05-11 2025-06-27 东莞嘉丰机电设备有限公司 一种基于人工智能自动化机箱生产设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1192559A (fr) * 1958-02-11 1959-10-27 Maschb Jonsdorf Veb élément presseur pour machines à polir à bande et machines à meuler humides comportant une bande de meulage tournante
FR1456684A (fr) * 1965-08-09 1966-07-08 Carborundum Co Machine à courroies à poncer et à polir
US3408775A (en) * 1966-02-16 1968-11-05 Carborundum Co Belt sanding and polishing machine
NL8000318A (nl) * 1980-01-17 1981-08-17 Linden Bv Machine Schuurinrichting.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007031066A1 (de) * 2005-09-12 2007-03-22 Lissmac Maschinenbau Und Diamantwerkzeuge Gmbh Vorrichtung zum entgratenden oder abschleifenden bearbeiten eines band- oder plattenförmigen metallischen werkstücks
US7614935B2 (en) 2005-09-12 2009-11-10 Lissmac Maschinebau Und Diamantwerkzeuge Gmbh Apparatus for machining a workpiece
DE102009055974A1 (de) * 2009-11-27 2011-06-01 Lissmac Maschinenbau Gmbh Bearbeitungsstation und Vorrichtung zum Bearbeiten eines Werkstücks
CN102666012A (zh) * 2009-11-27 2012-09-12 利玛机器制造有限公司 用于加工工件的加工平台和设备
US8574036B2 (en) 2009-11-27 2013-11-05 Lissmac Maschinenbau Gmbh Machining station and apparatus for machining a workpiece
CN102666012B (zh) * 2009-11-27 2014-12-10 利玛机器制造有限公司 用于加工工件的加工平台和设备

Also Published As

Publication number Publication date
ES8701003A1 (es) 1986-11-16
ES547137A0 (es) 1986-11-16
EP0187624A3 (de) 1988-07-20
IT1178654B (it) 1987-09-16
IT8423824A0 (it) 1984-11-30
IT8423824A1 (it) 1986-05-30

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