EP4321297A1 - Plattenbearbeitungsmaschine - Google Patents

Plattenbearbeitungsmaschine Download PDF

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Publication number
EP4321297A1
EP4321297A1 EP23189946.9A EP23189946A EP4321297A1 EP 4321297 A1 EP4321297 A1 EP 4321297A1 EP 23189946 A EP23189946 A EP 23189946A EP 4321297 A1 EP4321297 A1 EP 4321297A1
Authority
EP
European Patent Office
Prior art keywords
blocking
blocking bar
pin
housing
working
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.)
Pending
Application number
EP23189946.9A
Other languages
English (en)
French (fr)
Inventor
Marco Venturini
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.)
SCM Group SpA
Original Assignee
SCM Group 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 SCM Group SpA filed Critical SCM Group SpA
Publication of EP4321297A1 publication Critical patent/EP4321297A1/de
Pending 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
    • B24B21/12—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a contact wheel or roller pressing the belt against the work
    • 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
    • B24B21/18—Accessories
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/06—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving conveyor belts, a sequence of travelling work-tables or the like
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/28—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding wood

Definitions

  • the present invention relates to a panel machining machine.
  • the invention relates to a machine of the type described, having a blocking unit designed and realized in particular to block a working unit in position on which an abrasive belt is installed to perform finishing operations on the panels.
  • sanding machines are known for smoothing the surfaces of the panels, so as to reduce the imperfections generated by previous machining on the panels.
  • sanding machines comprise at least one sanding unit equipped with an abrasive belt or disc for performing the sanding operations on the movable panels, by means of a conveyor belt, along a forward direction.
  • the abrasive belt generally arranged in a closed loop, has the shape of a flexible cylinder.
  • the abrasive belt is capable of rotating in equilibrium between at least two rollers: a motorized or driving roller and an idle or driven roller.
  • the abrasive belt wears out easily due to its frequent use in panel sanding operations. Therefore, it is necessary to periodically replace the worsened abrasive belt with a new one, in order to avoid possible interruptions during the sanding operations as well as possible damage to the parts of the sanding machine.
  • a further drawback of the known solutions is that, during the sanding operations, the sanding unit remains elastically suspended from the sanding machine, without being constrained to the sanding machine.
  • Another scope of the invention is to provide a blocking unit that allows to replace the worn abrasive belt in a panel machining machine.
  • Another scope of the invention is to provide a blocking unit that allows guaranteeing the holding of the workload along the advancement direction of the panel.
  • Another scope of the invention is to provide a blocking unit that is highly reliable, relatively simple to make, and at competitive costs when compared to the prior art.
  • a sanding machine for machining panels comprising a supporting structure, and a panel working unit having a frame
  • said sanding machine comprises a pin integral with said frame, and a blocking bar, having at least one end, and rotatable around the pin between a resting position and a working position
  • said frame of said working unit has a seat configured to receive said blocking bar in said working position, and comprises reversible blocking means of the blocking bar in said seat, configured to be coupled with said pin
  • said supporting structure has a housing intended to engage said at least one end, wherein in the resting position, said blocking bar is decoupled from said housing and from said seat, and wherein in the working or blocking position, the first end of said blocking bar is rigidly engaged in said housing of the supporting structure, and wherein said blocking means are coupled to said pin and constrain said blocking bar in said seat, so as to rigidly couple the working unit to the support structure.
  • said pin may be threaded and said blocking means may comprise an operating lever, which can be screwed to said pin.
  • said seat may be a groove.
  • said sanding machine may comprise a first blocking handle, said blocking bar may have a first end, and said support structure may have a first housing, wherein said first blocking handle is arranged on said first end, and is configured to releasably couple with said first housing in said working position.
  • said first blocking handle may be adapted to rotate with respect to said blocking bar, so as to be inserted in said respective housing, and said first blocking handle may be configured to lock to said respective housing.
  • said sanding machine may comprise a second blocking handle
  • said support structure may have a second housing, which is sliding
  • said blocking bar may have a second end, wherein said second blocking handle is arranged on said second end, and is configured to releasably couple with said second housing in said working position.
  • said second blocking handle may be adapted to rotate with respect to said blocking bar, so as to be inserted in said respective housing, and said first blocking handle may be configured to lock to said respective housing.
  • said blocking bar may pass from the resting position to the working position by means of at least one translation movement substantially parallel to the axis of said pin.
  • said blocking bar may pass between the resting position and the working position by means of at least one rotation movement around the axis of said pin.
  • said sanding machine may comprise a working plane for the panels with an advancement direction, wherein the axis of the pin is oriented along a direction substantially transverse to the advancement direction of said panels.
  • the blocking bar in the working position may be oriented along a direction substantially parallel to the advancement direction (D) of the panels.
  • the machine for machining panels P substantially comprises an input station 10, an output station 11, a handling member 12, for transporting the panels P to be machined from said input station 10 towards said output station 11, a working unit 13 for carrying out machining on said panels P to be machined and a blocking unit 14 to block said working unit 13 in position.
  • the input station 10 allows the insertion of the panels P to be machined, while the output station 11 allows the exit of the panels P machined by the working unit 13.
  • the handling member 12 equipped with one or more motors (not shown in the figures), transports each panel P to be machined from said input station 10 towards said output station 11, according to an advancement direction D parallel or substantially parallel to an x axis of a Cartesian reference system xyz.
  • the handling member 12 comprises a plurality of conveyor rollers.
  • the movement member 12 can be of a different type, such as, by way of example, a conveyor belt.
  • the machine 1 comprises a compartment 15 for housing said working unit 13.
  • the compartment 15 has a first wall 150 and a second wall 151, opposite and facing said first wall 150.
  • Said first 150 and second 151 wall form a support structure.
  • the working unit 13 is arranged above said conveyor belt 12 and extends according to a z axis, i.e., according to a direction orthogonal to said advancement direction D.
  • said working unit 13 is a sanding unit.
  • the type and number of working unit 13 can be different from what is described, without thereby departing from the present invention.
  • the working unit 13 is movable along the z axis and performs the sanding of each panel P according to a y axis, which is orthogonal to the advancement direction D and to the development axis z.
  • the working unit 13 comprises a first roller or upper roller 131, a second roller or lower roller 132, arranged below said first roller 131, and an abrasive belt 133, arranged around said rollers 131, 132.
  • the first roller 131 is a motorized roller.
  • the rotation of said first roller 131 allows the rotation of said abrasive belt 133 around said rollers 131,132, according to a predetermined rotation direction.
  • the second roller 132 is a driven roller, i.e., without a motor.
  • the second roller 132 faces the underlying conveyor belt 12, to allow the abrasive belt 133 to come into contact with the upper surface of the panel P, arranged above said conveyor belt 12.
  • the working unit 13 also has a frame 134 for supporting the various elements described.
  • Said frame 134 also has a seat 135, which in the embodiment at issue is a groove, the function of which will be better defined below.
  • said seat can also be shaped in a different way.
  • the type and number of said rollers 131, 132 can be different from what is described, without thereby departing from the present invention.
  • the working unit 13 can also comprise more than two rollers or sanding tools.
  • the abrasive belt 133 allows sanding the surfaces of panel P.
  • said abrasive belt 133 arranged on said rollers 131, 132, contacts the upper surface of the panel P, so as to perform the sanding operations on the upper surface of the panel P.
  • the blocking unit 14, arranged at said second roller 131, comprises a blocking bar 140, an operating lever 141, coupled to said blocking bar 140, a first housing 142 fixed to the first wall 150 of the compartment 15 and a second housing 143, fixed to the second wall 151 of the compartment 15.
  • the second housing 143 is slidable, so as to fit into position when the blocking bar 140 is rotated and placed in the working or blocking position.
  • the blocking bar 140 is able to rotate around a fulcrum F (point around which the rotation takes place) between a resting position, in which the blocking bar 140 is parallel or substantially parallel to the z axis, i.e., perpendicular to the advancement direction D, and an operating position, in which the blocking bar 140 is parallel or substantially parallel to the x axis, i.e., perpendicular to the advancement direction D.
  • the rotation angle of said blocking bar 140 is equal to 90 degrees. However, in other embodiments, the angle of rotation of said blocking bar 140 may be different from what is described.
  • the blocking bar 140 when the blocking bar 140 is in said resting position, it is possible to replace the worn abrasive belt 133 with a new abrasive belt 133, to be positioned around said rollers 131, 132.
  • the replacement of the worn abrasive belt 133 is carried out by exploiting the spaces between said rollers 131, 132 and said walls 150, 151 of said compartment 15.
  • the ends 140a, 140b of said blocking bar 140 are respectively housed or inserted in said first 142 and second 143 housing. This allows the working unit 13 to be rigidly constrained to the machine 1, to support the work load.
  • blocking handles indicated respectively with 144 and 145, which are configured to engage with said housings 142, 143.
  • said first 144 and second 145 blocking handle when said blocking bar 140 is placed in the working position, are adapted to rotate with respect to it, so as to each fit inside the respective housing 142 and 143. Subsequently, said first 144 and second 145 blocking handles can be rotated to block into the respective housing 142 and 143.
  • further blocking systems of the blocking bar 140 may be provided.
  • the operating lever 141 which can be operated by an operator, allows the rotation of the blocking bar 140 from the resting position to the operating position and vice versa.
  • the operating lever 141 is coupled to a blocking pin 141'.
  • Said blocking pin 141' is positioned at the fulcrum F and is capable of blocking/unblocking the blocking bar 140 to/from said roller 132.
  • the blocking bar 140 is in the operating position and the locking pin 141' locks the blocking bar 140 to the frame 134.
  • the operating lever 141 is rotated, there is a relative movement between the frame 134 (with respect to said seat 135) and the blocking bar 140.
  • the operating lever 141 is rotated in the first rotational direction to unlock the blocking bar 140 from the frame 134.
  • the blocking bar 140 is rotated to pass from the operating position, leaving the seat 135, to the resting position.
  • the operating lever 141 by acting on the operating lever 141, there is a relative motion between the blocking bar 140 and the frame 134, and in particular with respect to the seat 135, thus disengaging the blocking bar 140 from the frame 134.
  • the operating lever 141 is then rotated in the second rotation direction to block the blocking bar 140 to the frame 134, so as to block the blocking bar 140 in the resting position.
  • the worn abrasive belt 133 is extracted from the working unit 13 and a new abrasive belt 133 is positioned around said rollers 131, 132.
  • the operating lever 141 is rotated in the first direction of rotation to unlock the blocking bar 140 from the frame 134.
  • the blocking bar 140 is rotated to go from the resting position to the operating position.
  • the ends 140a, 140b of the blocking bar 140, or more particularly the blocking handles 144 and 145, are respectively inserted into the housings 142, 143.
  • the operating lever 141 is then rotated in the second rotation direction to block the blocking bar 140 to the second roller 132, thereby blocking the blocking bar 140 in the operating position.
  • the operation of the working unit 13 is reactivated to perform the sanding operations on the surface of each panel P using the abrasive belt 133.
  • a first advantage of the blocking unit according to the present invention is that it allows replacement of the worn belt at a higher speed than known solutions, thus avoiding long machine downtimes.
  • a further advantage of the blocking unit according to the present invention is that of guaranteeing the holding of the work load along the advancement direction of the panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP23189946.9A 2022-08-08 2023-08-07 Plattenbearbeitungsmaschine Pending EP4321297A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200016959 2022-08-08

Publications (1)

Publication Number Publication Date
EP4321297A1 true EP4321297A1 (de) 2024-02-14

Family

ID=83899410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23189946.9A Pending EP4321297A1 (de) 2022-08-08 2023-08-07 Plattenbearbeitungsmaschine

Country Status (1)

Country Link
EP (1) EP4321297A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127760A1 (de) * 1983-05-03 1984-12-12 Bison-Werke Bähre & Greten GmbH & Co. KG Bandschleifmaschine
CA2505695A1 (en) * 2005-04-26 2006-10-26 Mao Shan Machinery Industrial Co., Ltd. Belt sander having sand belt replacement apparatus
EP2213414A2 (de) * 2009-02-02 2010-08-04 Steinemann Technology AG Breitschleifmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127760A1 (de) * 1983-05-03 1984-12-12 Bison-Werke Bähre & Greten GmbH & Co. KG Bandschleifmaschine
CA2505695A1 (en) * 2005-04-26 2006-10-26 Mao Shan Machinery Industrial Co., Ltd. Belt sander having sand belt replacement apparatus
EP2213414A2 (de) * 2009-02-02 2010-08-04 Steinemann Technology AG Breitschleifmaschine

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