EP3436216B1 - Polishing machine with cooling and suction system for heads for polishing ceramic manufactured items or natural stones - Google Patents

Polishing machine with cooling and suction system for heads for polishing ceramic manufactured items or natural stones Download PDF

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Publication number
EP3436216B1
EP3436216B1 EP17726677.2A EP17726677A EP3436216B1 EP 3436216 B1 EP3436216 B1 EP 3436216B1 EP 17726677 A EP17726677 A EP 17726677A EP 3436216 B1 EP3436216 B1 EP 3436216B1
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EP
European Patent Office
Prior art keywords
cooling
polishing
polishing machine
suction
suction means
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.)
Active
Application number
EP17726677.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3436216A1 (en
Inventor
Mario Corradini
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.)
Ancora SpA
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Ancora SpA
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Publication of EP3436216A1 publication Critical patent/EP3436216A1/en
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Publication of EP3436216B1 publication Critical patent/EP3436216B1/en
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    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • 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
    • B24B7/22—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 inorganic material, e.g. stone, ceramics, porcelain

Definitions

  • the present invention refers to a polishing machine comprising a cooling and suction system for polishing heads for polishing, for example through smoothing, lapping or the like, ceramic manufactured items or natural stones.
  • Water cooling systems are known which provide for the introduction of the cooling liquid by means of a feed duct that traverses the main body until it reaches the tools.
  • the body has a central opening for the outflow of the water in proximity to the work tools.
  • Another problem of the known air cooling devices for the polishing tool is given by the dispersion of dust and residues of the polishing in the environment, since the air blown in the smoothing zone lifts and disperses the dust and residues of the polishing.
  • EP1832386A1 teaches a solution according to the state of the art and is the basis for the preamble of appended claim 1.
  • the main object of the present invention is that of improving the state of the art in the field of cooling plants for polishing heads for polishing ceramic manufactured items or natural stones.
  • one object of the present invention is to provide a polishing machine with a cooling and suction system for the polishing heads which allows the heads to work with an optimal cooling.
  • Another object of the present invention is to provide a polishing machine with a cooling and suction system for polishing heads which allows effectively freeing and recovering the dusts and residues from the polishing zone, preventing dispersions in the environment.
  • Another object of the present invention is to provide a polishing machine with a cooling and suction system for polishing heads which is easy to achieve, and at competitive costs.
  • a polishing machine for polishing ceramic manufactured items, natural stones or the like is indicated overall with the reference number 1.
  • the machine 1 comprises a support frame 2 which is associated with an abutment surface for ceramic manufactured items 8, or natural stones, movable along an advancement direction identified with the arrow 3 on an abutment surface 4.
  • the machine 1 comprises a plurality of heads 5 for polishing, for example through smoothing or lapping, ceramic manufactured items 8, or natural stones, the heads 5 are arranged one after the other along the advancement direction 3 and above the abutment surface 4.
  • the heads 5 are driven by motor means 12 and are supported by at least two beams 6 oscillating according to a transverse direction 7.
  • Each polishing head 5 comprises a main body 9 and at least one tool 10 for working the ceramic manufactured items or natural stones associated with the main body 9.
  • Each head 5 can comprise a plurality of tools 10 associated on the lower part with the body 9 due to the interposition of a support element 11.
  • the cooling and suction system for the polishing heads 5 comprises first bell-shaped cooling and suction means 13 arranged around each polishing head 5, second perimeter cooling and suction means 14 arranged around the perimeter of the work zone, i.e. on the sides of the ceramic manufactured items 8, or of the natural stones, and between one polishing head 5 and the next.
  • Third cooling means 15 are also provided, arranged at the center and/or within each polishing head 5. It must be observed that the first cooling and suction means 13 and the third cooling means 15, arranged around, at the center and/or within each polishing head 5, are movable with the oscillating movement of each polishing head 5, hence the aforesaid first and third cooling means are always very close to the work zone where the heat is developed and the dust generated.
  • the first bell-shaped cooling and suction means 13 comprise a first opening 16 for dust suction, arranged in proximity to and around the tools 10.
  • the first opening 16 can have ring shape, arranged concentrically with respect to the rotation axis of the polishing head 5 and be divided into several portions.
  • the first ring-shaped opening 16 is divided into two portions 17 and 18, even if there can be any number of the aforesaid portions, starting from one.
  • the first bell-shaped cooling and suction means 13 also comprise a second opening 19 for sending a pressurized gas, for example air, for cooling the tools 10 and the work surface of the ceramic manufactured items 8, or of the natural stones, also this second opening 19 is situated in proximity to and around the tools 10.
  • a pressurized gas for example air
  • the second opening 19 can be ring-shaped and be arranged around the first opening 16.
  • the second opening 19 is arranged concentrically with respect to the rotation axis of the polishing head 5 and divided into several portions.
  • the second opening 19 is divided into two portions 20 and 21, even if there can be any number of the aforesaid portions, starting from one.
  • the third cooling means 15 arranged at the center and/or within each polishing head 5 are provided for sending a pressurized gas, for example air, for cooling the tools 10 and the work surface of the ceramic manufactured items 8, or of the natural stones, with a cooling function similar to that of the second opening 19.
  • a pressurized gas for example air
  • the pressurized gas outlet end of the second opening 19 can have elongated slot shape or it can have a series of adjacent holes, similar to the outlet ends, illustrated in figures 7 and 8 , of analogous cooling openings which make up part of the second perimeter cooling and suction means 14 and which will be better described hereinbelow.
  • the second opening 19 is oriented in a manner so as to send pressurized cooling gas jets into the work zone of the ceramic manufactured items, while the first suction opening 16 has a wide suction surface such to effectively suction the cooling gases and work dusts, lifted by the cooling gases, coming from both the third cooling means 15 in the center and/or within each polishing head 5, and coming from the second opening 19 arranged outside the first cooling and suction means 13.
  • arrows 22 indicate a first part of cooling gases and work dusts, which come from the center of each polishing head 5 and go towards the first suction opening 16
  • arrows 23 indicate a second part of cooling gases and work dusts, which come from the second opening 19 and go towards the first suction opening 16
  • arrows 24 ( figure 5 ) indicate the cooling gases and the work dusts suctioned from the first opening 16.
  • the first bell-shaped cooling means 13 and the third cooling means 15 in the center and/or within each polishing head 5 are situated very close to the work zone and determine an effective cooling of the tools 10 and of the ceramic manufactured items 8, or of the natural stones.
  • cooling gases can be brought to low temperature by means of a suitable refrigerator, also termed chiller.
  • the work dusts lifted by the cooling gases are sent to a centralized suction and filtration plant, in which the dusts are collected. Neither of these plants form part of the present invention and thus they are neither illustrated nor described in more detail hereinbelow.
  • the second perimeter cooling and suction means 14 comprise front and rear blowing means 25 and lateral suction means 26.
  • the blowing means 25 send cooling gases, indicated with arrows 28 ( figures 5 and 6 ), onto the ceramic manufactured items 8, or onto the natural stones, and these cooling gases together with the work dusts are then suctioned by the lateral suction means 26 and also possibly by the first ring-shaped opening 16 adjacent to the polishing head 5.
  • the blowing means 25 allow delimiting the dispersion of the dusts between one polishing head 5 and the next. Indeed, the cooling gases 28 which exit from the blowing means 25, which are arranged at the front and rear for the entire length of the advancement conveyor belt, create a barrier that prevents the dusts from passing from a polishing zone to another zone.
  • polishing occurs progressively, starting from coarse-grained tools before finally arriving at tools with increasingly fine grain.
  • the dusts that are generated with the coarse grain tools also have larger grain size than the dusts generated with the finer grain tools, and it is essential that the dusts with larger grain size do not enter into the zones where the tools with finer grain size are used, since they could scratch the parts that are already polished.
  • the gas barrier generated by the blowing means 25 serves to eliminate this drawback.
  • the blowing means 25 are arranged tilted with a blowing direction opposite the advancement direction 3 of the ceramic manufactured items 8, or of the natural stones.
  • the dusts are confined and sent back towards the polishing zones with larger grain size, and towards the suction means 26 and the opening 16 which then provide for suctioning the dusts.
  • the tilt angle of the blowing means 25 is comprised between 85° and 45° with respect to the work plane of the ceramic manufactured items 8, or of the natural stones.
  • blowing means 25 comprise a series of holes 32 adjacent to each other for the outflow of the cooling gases 28, while in figure 8 another embodiment is illustrated comprising slots 33 for the outflow of cooling gas jets 28.
  • the holes 32 and the slots 33 have an optimized shape in order to obtain powerful and concentrated cooling gas jets 28 that determine an effective barrier for the dusts that are generated in the polishing working.
  • the cooling gases emitted by the blowing means 25 can be brought to low temperature by means of a suitable refrigerator plant.
  • the lateral suction means 26 are situated which essentially comprise one or two tanks 27 that are arranged on at least one of the sides, or on both sides, of the polishing zone where each head 5 operates.
  • Each tank 27 comprises an elongated slit 29 which is situated at about the height of the work surface of the ceramic manufactured items 8, or of the natural stones, thus facilitating an effective suction of the dusts generated by the working of the tools 10.
  • a series of slots or a series of holes can be provided (not illustrated).
  • the tanks 27 are connected by means of a series of tubes 30 to a suction manifold 31, which has an increasing section, see in particular figures 1 and 2 , in a manner so as to be adapted to the suction flow rate that increases according to the advancement direction 3.
  • the work dusts suctioned by the means 26 are sent to a centralized suction and filtration plant in which the dusts are collected.
  • the cooling and suction system object of the present invention, operates in the following manner.
  • the first cooling and suction means 13 send a ring-shaped cooling gas jet 23 on the tools 10 and on the polishing zone of the ceramic manufactured items 8, or natural stones.
  • the jet 23 is substantially ring-shaped and is oriented towards the rotation center of the polishing head 5.
  • the first cooling and suction means 13 and the third cooling means 15 are very close to the work zone and provide an effective cooling and suction in the work zone; it should be observed that these means 13 and 15 also follow the oscillating movements of the polishing head 5.
  • the second cooling and suction means 14 are fixed and are situated more distant from the polishing head 5 and in perimeter position with respect to the ceramic manufactured items 8, or natural stones. These second cooling and suction means 14 allow delimiting the dusts of different grain size between one polishing head 5 and the next, providing a further cooling on the work surface of the ceramic manufactured items 8, or natural stones; also provided is a lateral suction for the dusts in order to limit the dispersion in the environment.
  • the cooling gases can comprise only air taken from the environment, that is filtered, pressurized and with a humidity level that is optimized for obtaining an effective cooling without mixing the dusts generated during working, and possibly cooled, or the cooling gases can comprise other inert and/or noble gases, for example neon, argon, krypton, xenon, nitrogen, etcetera, or mixtures of these inert and/or noble gases with each other or with the addition of air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP17726677.2A 2016-04-01 2017-03-30 Polishing machine with cooling and suction system for heads for polishing ceramic manufactured items or natural stones Active EP3436216B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUA2016A002251A ITUA20162251A1 (it) 2016-04-01 2016-04-01 Impianto di raffreddamento e aspirazione per teste di lucidatura di manufatti ceramici o pietre naturali
PCT/IB2017/051829 WO2017168366A1 (en) 2016-04-01 2017-03-30 Cooling and suction system for heads for polishing ceramic manufactured items or natural stones

Publications (2)

Publication Number Publication Date
EP3436216A1 EP3436216A1 (en) 2019-02-06
EP3436216B1 true EP3436216B1 (en) 2020-02-12

Family

ID=56296997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17726677.2A Active EP3436216B1 (en) 2016-04-01 2017-03-30 Polishing machine with cooling and suction system for heads for polishing ceramic manufactured items or natural stones

Country Status (6)

Country Link
EP (1) EP3436216B1 (it)
CN (1) CN109070310A (it)
BR (1) BR112018069672A2 (it)
ES (1) ES2790892T3 (it)
IT (1) ITUA20162251A1 (it)
WO (1) WO2017168366A1 (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3727747B1 (en) * 2017-12-21 2021-12-01 Ancora S.p.A. Machine for dry processing tiles or slabs
IT201900005792A1 (it) * 2019-04-15 2020-10-15 Ancora Spa Testa di trattamento di elementi lastriformi
IT201900016721A1 (it) * 2019-09-19 2021-03-19 Simec Spa Testa per una macchina utensile di lucidatura e/o calibratura di lastre in materiale lapideo e/o ceramico
IT201900017537A1 (it) 2019-09-30 2021-03-30 Ancora Spa Impianto di lavorazione di manufatti ceramici, pietre naturali, o simili
IT201900018914A1 (it) 2019-10-15 2021-04-15 Ancora Spa Impianto di lavorazione di manufatti od oggetti ceramici o pietre naturali
IT202000008257A1 (it) * 2020-04-17 2021-10-17 Siti B & T Group Spa Gruppo e procedimento per la lucidatura di manufatti ceramici o pietre naturali

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JPH11129159A (ja) * 1997-10-30 1999-05-18 Nikken Kogyo:Kk 表面研き装置
US5993305A (en) * 1998-10-31 1999-11-30 Chu; Eric Air-drafting dust remover for power sander
IT1315622B1 (it) * 2000-03-21 2003-03-14 Nuove Officine Ancora S P A Sistema di levigatura di manufatti ceramici.
RU2307729C1 (ru) * 2005-12-26 2007-10-10 Татьяна Николаевна Иванова Шлифовальный инструмент с вихревым охлаждением
DE102006010975B4 (de) * 2006-03-09 2008-04-03 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co. Kg Schleifrad zur spanabhebenden Bearbeitung von Gegenständen, insbesondere von natürlichen oder künstlichen Steinen
CN201776673U (zh) * 2010-04-21 2011-03-30 苏州宝时得电动工具有限公司 砂光机
CN102233532A (zh) * 2010-04-21 2011-11-09 苏州宝时得电动工具有限公司 磨砂机
JP5563928B2 (ja) * 2010-08-25 2014-07-30 リコーマイクロエレクトロニクス株式会社 切断方法及び切断装置
CN102430981A (zh) * 2011-12-09 2012-05-02 傅月华 自吸尘抛光机
WO2016042464A1 (en) * 2014-09-16 2016-03-24 Ancora S.P.A. Machinery for the machining of ceramic articles
CN104802041A (zh) * 2015-04-23 2015-07-29 广东一鼎科技有限公司 抛光方法
CN104875098A (zh) * 2015-07-02 2015-09-02 天津舜龙顺昌石材销售有限公司 一种无振动波纹及环保型石材线条生产设备

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Also Published As

Publication number Publication date
BR112018069672A2 (pt) 2019-02-05
ITUA20162251A1 (it) 2017-10-01
EP3436216A1 (en) 2019-02-06
WO2017168366A1 (en) 2017-10-05
CN109070310A (zh) 2018-12-21
ES2790892T3 (es) 2020-10-29

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