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EP3274129A1 - Head for polishing ceramic items or natural stones - Google Patents

Head for polishing ceramic items or natural stones

Info

Publication number
EP3274129A1
EP3274129A1 EP16725219.6A EP16725219A EP3274129A1 EP 3274129 A1 EP3274129 A1 EP 3274129A1 EP 16725219 A EP16725219 A EP 16725219A EP 3274129 A1 EP3274129 A1 EP 3274129A1
Authority
EP
European Patent Office
Prior art keywords
head
air
natural stones
feed duct
tool
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Withdrawn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
EP16725219.6A
Other languages
German (de)
French (fr)
Inventor
Mario Corradini
Fabio 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
Original Assignee
Ancora 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 Ancora SpA filed Critical Ancora SpA
Publication of EP3274129A1 publication Critical patent/EP3274129A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B24B7/224—Portal grinding machines; Machines having a tool movable in a plane
    • 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
    • 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
    • B24B41/0475—Grinding heads for working on plane surfaces equipped with oscillating abrasive blocks, e.g. mounted on a rotating head
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals

Definitions

  • the present invention refers to a head for polishing, for example by means of smoothing, lapping or the like, ceramic manufactured articles or natural stones.
  • Such working is generally executed by means of machineries which provide for the use of specific work heads comprising a main body which can be rotated around a relative axis and supporting a plurality of tools suitable for working the manufactured articles.
  • the body has a central opening for the outflow of the water in proximity to the work tools.
  • the main object of the present invention is to devise a head for polishing ceramic manufactured articles or natural stones, which allows a cooling of the work tools that is efficient, easy to achieve and with limited cost.
  • one object of the present finding is to reduce the energy expenditure required for cooling the tools.
  • Another object of the present finding is to devise a head for polishing ceramic manufactured articles or natural stones which allows overcoming the abovementioned drawbacks of the prior art in the scope of a simple, rational solution, with easy and effective use and limited cost.
  • figure 1 is an axonometric view of machinery according to the finding
  • figure 2 is an axonometric bottom view of a head according to the finding
  • figure 3 is a sectional view of the head of figure 2.
  • reference number 1 overall indicates machinery for polishing ceramic manufactured articles, natural stones or the like.
  • the machinery 1 comprises a support frame 2 which is associated with a surface of abutment of the ceramic manufactured articles or natural stones, not represented in the figures, and movable along an advancement direction identified with the arrow 3.
  • the abutment surface is for example the upper surface of a conveyor belt.
  • the machinery 1 comprises at least one head 4 for polishing, for example by means of smoothing or lapping, the ceramic manufactured articles or the natural stones arranged on top of the abutment surface.
  • the machinery 1 comprises a plurality of heads 4 associated with the support frame 2 and arranged one after the other along the advancement direction 3.
  • Each head 4 comprises a main body 5 and at least one tool 6 for working the ceramic manufactured articles or the natural stones associated with the main body 5.
  • each head 4 comprises a plurality of tools 6 associated on the lower part with the body 5. More particularly, each head 4 comprises two, four, six or more tools mounted on the lower part and angularly offset around the body 5.
  • each tool 6 is associated with the body 5 via interposition of a support element 7.
  • each support element 7 can be movable in rotation with respect to the body 5 around a relative rotation axis 7a, in a manner such to allow the movement of each tool 6 along a predefined work angle.
  • the machinery 1 comprises at least one motor element 8 for rotating of each head 4 around a relative axis 9, during use, if desired substantially vertical.
  • each support tool 6 with respect to the body 5 is substantially transverse or orthogonal to the rotation axis 9 of the head 4.
  • means are also provided for the angular or oscillating movement of the tools 6 with respect to the body 5, e.g. electric motors or motors of another type, such that the tools 6 can be angularly moved or oscillate around the respective axis 7a during the working or use of the head 4.
  • the machinery 1 comprises a plurality of motor elements 8; in the current case, each motor element 8 is associated with a relative head 4 for rotating the corresponding body 5 around the rotation axis 9.
  • the machinery 1 comprises means 10, 11, 12 for transmitting the motion from each motor element 8 to the relative head 4.
  • the motion transmission means 10, 11, 12 comprise at least one first pulley, not visible in the figures, associated with the motor element 8 and at least one second pulley 10 associated with a shaft 11 , which rotatably supports each head 4, and a belt element 12 which connects together the first pulley and the second pulley 10.
  • the motor element 8 by actuating the motor element 8, the rotary motion generated thereby is transmitted from the first pulley to the second pulley 10 through the belt element 12 and, then, from the second pulley 10 to the head 4 through the shaft 11.
  • each body 5 comprises an element 13 for attaching to the support frame 2.
  • the attachment element 13 is of the type of a flange provided with holes 14 for bolting to a corresponding flanged plate, non represented in the figures, associated with the support frame 2.
  • each head 4 can be subjected to a lateral transverse movement, i.e. a movement transverse or orthogonal to the advancement direction of the pieces to be worked; such movement can for example be obtained by means of suitable means for moving a beam or the like of the head support machinery.
  • the head 4 comprises means 15, 16, 17 for cooling the tools 6, of air type.
  • cooling means 15, 16, 17 comprise at least one channel 17 for delivering air to the tools 6.
  • the cooling means 15, 16, 17 comprise a plurality of delivery channels 17.
  • Each head 4 comprises at least one delivery channel 17 for each work tool 6.
  • each delivery channel 17 is arranged at each tool 6.
  • the cooling means 15, 16, 17 comprise at least one air collection chamber 15 and at least one duct 16 for feeding air into the collection chamber itself.
  • Each delivery channel 17 is communicating with the collection chamber 15.
  • the collection chamber 15 is arranged at the lower portion of the body 5.
  • the collection chamber 15 is laterally delimited by a wall 18 having substantially circular shape.
  • the delivery channels branch out from the wall 18.
  • the delivery channels 17 are radially oriented with respect to the rotation axis 9.
  • each head 4 comprises at least one closure element 19 sealingly associated with the lower portion of the body 5 and facing the air outlet mouth 20 defined by the feed duct 16.
  • the collection chamber 15 is interposed between the closure element 19 and the body 5.
  • the feed duct 16 traverses the body 5 and comprises a first end 21, connectable with air feeding means, not represented in the figures, adapted to send pressurized air into the feed duct 16, and a second end 22, coinciding with the outlet mouth 20, arranged in proximity to the bottom of the collection chamber 15.
  • the bottom of the collection chamber 15, defined by the closure element 19, is spaced from the outlet mouth 20 so as to allow the flow of the air into the collection chamber itself and towards the delivery channels 17.
  • the rotation axis 9 of the head 4 corresponds to the longitudinal axis of the feed duct 16, which can be rectilinear.
  • the cooling means can comprise a feed duct 16 which is at least partly extended along and enclosing a central symmetry axis 9 of the head 4; such feed duct 16 opens on the lower part or on the respective bottom to the delivery channel(s) 17, which open towards the tool(s) 6.
  • the delivery channel/channels 17 opens/open into a zone that is central, external and below, if desired annular AZ, with respect to the head 4, so as to feed cooling air against the external surface of the tools.
  • the feed duct 16 is extended along and actually encloses the central symmetry axis, if desired rotation axis 9; such axis 9 if desired also constitutes a central symmetry axis of the feed duct 16 itself.
  • the air is centrally conveyed into the feed duct 16 and from this it opens on the lower part or on the bottom into the delivery channels 17; if a chamber 15 is provided, feed duct 16 opens onto the bottom of the underlying chamber 15, in a substantially lower central position of the head 4 and from here, through the delivery channels 17, the air is conveyed on the side of the chamber 15 towards the tools 6, if desired exiting from the head into a zone that is central, external and below AZ the same before externally hitting the tools 6.
  • the tools 6 are actually mounted around the feed duct 16, in a manner such that cooling air is centrally conveyed to the head 4, and from a central lower position of the latter the air is conveyed substantially radially towards the tools 6. Among other things this allows a delivery of the cooling air that is simultaneously simple and effective.
  • the feed means can for example be of the type of a compressor group, a turbo- compressor group, a turbine or the like.
  • the delivery channels 17 are arranged tilted with respect to the rotation axis itself and have an air outlet section 23 arranged below the inlet section 24 and directed towards a respective tool 6.
  • the delivery channels 17 can be arranged substantially orthogonal to the rotation axis 9 and open towards the relative tool, in a manner so as to hit it substantially parallel to the contact surface with the manufactured article.
  • the inlet section 24 and the outlet section 23 are arranged substantially at the same height.
  • the machinery 1 comprises means 26 for suctioning the processing residues.
  • the suction means 26 are arranged on the side of the abutment surface with respect to the advancement direction 3 of the ceramic manufactured articles.
  • the suction means comprise one or more suction cases 26 or the like placed on the sides of the abutment surface.
  • the cases 26 have a suction opening placed at the height of the interface surface between tools 6 and abutment surface or directed towards such abutment surface.
  • Such suction means are adapted to remove the processing residues produced by the tools 6 during the working of the ceramic manufactured articles or the natural stones; this ensures the cleaning of the abutment surface during the polishing process.
  • a head 4 could also comprise a bell-shaped element 25 or the like, entirely or partly enclosing the main body 5 and delimiting, with the external surface of the main body 5, a zone for conveying cooling fluid, in particular air, towards an abutment surface (for such purpose see the arrows Fl of figure 3). More particularly, the fluid conveyance zone of the bell-shaped element 25 is fed at an upper end thereof with air, for example cooled by means of suitable cooling plant, and is intended to deliver air to the abutment surface, i.e. to an end below the bell-shaped element 25. As will be understood, the air delivered through the conveyance zone of the bell-shaped element 25 would act in combination with the air conveyed by means of the internal cooling means 15 for cooling the tools 6.
  • the bell-shaped element 25, if provided, can be integral with a respective head 4, so as to be moved together with the head 4 in its traverse movement, so that the air conveyed through the bell-shaped element 25 would always be delivered into the zone treated by the head 4.
  • annular element or the like can be provided, entirely or partly enclosing a head.
  • the heads 4 are rotated around the respective axes 9 by means of the transmission means 10, 11 , 12, so as to obtain the polishing of the manufactured articles due to the action of the tools 6.
  • the air feeding means send compressed air to the collection chamber 15 by means of the feed duct 16.
  • the air in the collection chamber 15 is in turn distributed in the delivery channels 17, thus reaching the relative tool 6.
  • the air is directed towards each tool 6, cooling the latter during the working of the ceramic manufactured articles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The head (4) for polishing ceramic manufactured articles or natural stones comprises a main body (5) and at least one work tool (6) associated with the body (5) for polishing ceramic manufactured articles or natural stones, and air cooling means (10, 11, 12) for the tool (6).

Description

Industrial Invention Patent Description having as title:
"HEAD FOR POLISHING CERAMIC ITEMS OR NATURAL STONES"
TECHNICAL FIELD OF THE INVENTION
The present invention refers to a head for polishing, for example by means of smoothing, lapping or the like, ceramic manufactured articles or natural stones.
STATE OF THE ART
With particular reference to the field of the ceramic industry for producing manufactured articles such as tiles, plates or bricks, or of the natural stones, it is known to carry out working, such as complete smoothing or lapping, in order to improve their surface finish.
Such working is generally executed by means of machineries which provide for the use of specific work heads comprising a main body which can be rotated around a relative axis and supporting a plurality of tools suitable for working the manufactured articles.
In particular, the strong friction generated by the action of each tool on the manufactured article leads to an overheating of the work tool itself, so as to necessitate the cooling thereof.
Currently, water cooling systems are in use, 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.
In detail, the body has a central opening for the outflow of the water in proximity to the work tools.
It is easy to understand that the use of water for cooling the work tools causes a considerable resource and energy consumption.
Another drawback is tied to the need to remove the cooling water.
OBJECTS OF THE INVENTION
The main object of the present invention is to devise a head for polishing ceramic manufactured articles or natural stones, which allows a cooling of the work tools that is efficient, easy to achieve and with limited cost.
Included in such task, one object of the present finding is to reduce the energy expenditure required for cooling the tools.
Another object of the present finding is to devise a head for polishing ceramic manufactured articles or natural stones which allows overcoming the abovementioned drawbacks of the prior art in the scope of a simple, rational solution, with easy and effective use and limited cost.
The abovementioned objects are achieved by the present head for polishing ceramic manufactured articles or natural stones having the characteristics of claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
Other characteristics and advantages of the present invention will be more evident from the description of a preferred but not exclusive embodiment of a head for polishing ceramic manufactured articles or natural stones, illustrated as a non- limiting example in the enclosed drawing tables in which:
figure 1 is an axonometric view of machinery according to the finding;
figure 2 is an axonometric bottom view of a head according to the finding;
figure 3 is a sectional view of the head of figure 2.
EMBODIMENTS OF THE INVENTION
With particular reference to such figures, reference number 1 overall indicates machinery for polishing ceramic manufactured articles, natural stones or the like. The machinery 1 comprises a support frame 2 which is associated with a surface of abutment of the ceramic manufactured articles or natural stones, not represented in the figures, and movable along an advancement direction identified with the arrow 3. The abutment surface is for example the upper surface of a conveyor belt.
In addition, the machinery 1 comprises at least one head 4 for polishing, for example by means of smoothing or lapping, the ceramic manufactured articles or the natural stones arranged on top of the abutment surface. With reference to the particular embodiment solution represented in the figures, the machinery 1 comprises a plurality of heads 4 associated with the support frame 2 and arranged one after the other along the advancement direction 3.
Each head 4 comprises a main body 5 and at least one tool 6 for working the ceramic manufactured articles or the natural stones associated with the main body 5.
Advantageously, each head 4 comprises a plurality of tools 6 associated on the lower part with the body 5. More particularly, each head 4 comprises two, four, six or more tools mounted on the lower part and angularly offset around the body 5.
Usefully, each tool 6 is associated with the body 5 via interposition of a support element 7.
In detail, each support element 7 can be movable in rotation with respect to the body 5 around a relative rotation axis 7a, in a manner such to allow the movement of each tool 6 along a predefined work angle.
The machinery 1 comprises at least one motor element 8 for rotating of each head 4 around a relative axis 9, during use, if desired substantially vertical.
More particularly, the rotation axis 7a of each support tool 6 with respect to the body 5 is substantially transverse or orthogonal to the rotation axis 9 of the head 4. If desired, means are also provided for the angular or oscillating movement of the tools 6 with respect to the body 5, e.g. electric motors or motors of another type, such that the tools 6 can be angularly moved or oscillate around the respective axis 7a during the working or use of the head 4.
In the embodiment shown in figure 1, the machinery 1 comprises a plurality of motor elements 8; in the current case, each motor element 8 is associated with a relative head 4 for rotating the corresponding body 5 around the rotation axis 9. In addition, the machinery 1 comprises means 10, 11, 12 for transmitting the motion from each motor element 8 to the relative head 4.
The motion transmission means 10, 11, 12 comprise at least one first pulley, not visible in the figures, associated with the motor element 8 and at least one second pulley 10 associated with a shaft 11 , which rotatably supports each head 4, and a belt element 12 which connects together the first pulley and the second pulley 10. In this manner, by actuating the motor element 8, the rotary motion generated thereby is transmitted from the first pulley to the second pulley 10 through the belt element 12 and, then, from the second pulley 10 to the head 4 through the shaft 11.
Advantageously, each body 5 comprises an element 13 for attaching to the support frame 2. With reference to the particular embodiment solution represented in the figures, the attachment element 13 is of the type of a flange provided with holes 14 for bolting to a corresponding flanged plate, non represented in the figures, associated with the support frame 2.
If desired, each head 4 can be subjected to a lateral transverse movement, i.e. a movement transverse or orthogonal to the advancement direction of the pieces to be worked; such movement can for example be obtained by means of suitable means for moving a beam or the like of the head support machinery.
According to the finding, the head 4 comprises means 15, 16, 17 for cooling the tools 6, of air type.
In addition, the cooling means 15, 16, 17 comprise at least one channel 17 for delivering air to the tools 6.
With reference to the particular embodiment solution represented in the figures, the cooling means 15, 16, 17 comprise a plurality of delivery channels 17.
Each head 4 comprises at least one delivery channel 17 for each work tool 6.
More particularly, each delivery channel 17 is arranged at each tool 6.
Advantageously, the cooling means 15, 16, 17 comprise at least one air collection chamber 15 and at least one duct 16 for feeding air into the collection chamber itself.
Each delivery channel 17 is communicating with the collection chamber 15.
As is visible in the figures, the collection chamber 15 is arranged at the lower portion of the body 5.
Advantageously, the collection chamber 15 is laterally delimited by a wall 18 having substantially circular shape.
Usefully, the delivery channels branch out from the wall 18.
Preferably, the delivery channels 17 are radially oriented with respect to the rotation axis 9.
In addition, each head 4 comprises at least one closure element 19 sealingly associated with the lower portion of the body 5 and facing the air outlet mouth 20 defined by the feed duct 16.
In detail, the collection chamber 15 is interposed between the closure element 19 and the body 5.
As is visible in the figures, the feed duct 16 traverses the body 5 and comprises a first end 21, connectable with air feeding means, not represented in the figures, adapted to send pressurized air into the feed duct 16, and a second end 22, coinciding with the outlet mouth 20, arranged in proximity to the bottom of the collection chamber 15.
More particularly, the bottom of the collection chamber 15, defined by the closure element 19, is spaced from the outlet mouth 20 so as to allow the flow of the air into the collection chamber itself and towards the delivery channels 17.
Usefully, the rotation axis 9 of the head 4 corresponds to the longitudinal axis of the feed duct 16, which can be rectilinear.
In substance, the cooling means can comprise a feed duct 16 which is at least partly extended along and enclosing a central symmetry axis 9 of the head 4; such feed duct 16 opens on the lower part or on the respective bottom to the delivery channel(s) 17, which open towards the tool(s) 6. If desired, the delivery channel/channels 17 opens/open into a zone that is central, external and below, if desired annular AZ, with respect to the head 4, so as to feed cooling air against the external surface of the tools.
According to the non-limiting embodiment illustrated in the figure, the feed duct 16 is extended along and actually encloses the central symmetry axis, if desired rotation axis 9; such axis 9 if desired also constitutes a central symmetry axis of the feed duct 16 itself. Therefore, the air is centrally conveyed into the feed duct 16 and from this it opens on the lower part or on the bottom into the delivery channels 17; if a chamber 15 is provided, feed duct 16 opens onto the bottom of the underlying chamber 15, in a substantially lower central position of the head 4 and from here, through the delivery channels 17, the air is conveyed on the side of the chamber 15 towards the tools 6, if desired exiting from the head into a zone that is central, external and below AZ the same before externally hitting the tools 6.
The tools 6 are actually mounted around the feed duct 16, in a manner such that cooling air is centrally conveyed to the head 4, and from a central lower position of the latter the air is conveyed substantially radially towards the tools 6. Among other things this allows a delivery of the cooling air that is simultaneously simple and effective.
The feed means can for example be of the type of a compressor group, a turbo- compressor group, a turbine or the like.
In the particular embodiment solution represented in the figures, the delivery channels 17 are arranged tilted with respect to the rotation axis itself and have an air outlet section 23 arranged below the inlet section 24 and directed towards a respective tool 6.
In an alternative embodiment, the delivery channels 17 can be arranged substantially orthogonal to the rotation axis 9 and open towards the relative tool, in a manner so as to hit it substantially parallel to the contact surface with the manufactured article.
In other words, the inlet section 24 and the outlet section 23 are arranged substantially at the same height.
In addition, the machinery 1 comprises means 26 for suctioning the processing residues.
The suction means 26 are arranged on the side of the abutment surface with respect to the advancement direction 3 of the ceramic manufactured articles. For such purpose, the suction means comprise one or more suction cases 26 or the like placed on the sides of the abutment surface. In addition, the cases 26 have a suction opening placed at the height of the interface surface between tools 6 and abutment surface or directed towards such abutment surface.
Such suction means are adapted to remove the processing residues produced by the tools 6 during the working of the ceramic manufactured articles or the natural stones; this ensures the cleaning of the abutment surface during the polishing process.
In addition, a head 4 could also comprise a bell-shaped element 25 or the like, entirely or partly enclosing the main body 5 and delimiting, with the external surface of the main body 5, a zone for conveying cooling fluid, in particular air, towards an abutment surface (for such purpose see the arrows Fl of figure 3). More particularly, the fluid conveyance zone of the bell-shaped element 25 is fed at an upper end thereof with air, for example cooled by means of suitable cooling plant, and is intended to deliver air to the abutment surface, i.e. to an end below the bell-shaped element 25. As will be understood, the air delivered through the conveyance zone of the bell-shaped element 25 would act in combination with the air conveyed by means of the internal cooling means 15 for cooling the tools 6. The bell-shaped element 25, if provided, can be integral with a respective head 4, so as to be moved together with the head 4 in its traverse movement, so that the air conveyed through the bell-shaped element 25 would always be delivered into the zone treated by the head 4.
Alternatively, in place of a bell-shaped element 25, an annular element or the like can be provided, entirely or partly enclosing a head. The operation of the present finding is as follows.
During the passage of the manufactured articles, the heads 4 are rotated around the respective axes 9 by means of the transmission means 10, 11 , 12, so as to obtain the polishing of the manufactured articles due to the action of the tools 6. Simultaneously, the air feeding means send compressed air to the collection chamber 15 by means of the feed duct 16.
The air in the collection chamber 15 is in turn distributed in the delivery channels 17, thus reaching the relative tool 6. In other words, the air is directed towards each tool 6, cooling the latter during the working of the ceramic manufactured articles.
It has in practice been seen that the described invention attains the proposed objects.
In particular, it is underlined that the particular expedient of providing for the air cooling of the work tools allows obtaining an efficient cooling process that is easy to achieve with limited cost, considerably reducing the energy expenditure required for the cooling of the tools themselves.

Claims

1. Head (4) for polishing ceramic manufactured articles or natural stones comprising a main body (5) and at least one work tool (6) associated with said body (5) for polishing ceramic manufactured articles or natural stones, characterized in that it comprises air cooling means (15, 16, 17) for said tool (6).
2. Head (4) according to claim 1, characterized in that said cooling means (15, 16, 17) comprise at least one channel (17) for delivering air to said tool (6).
3. Head (4) according to one or more of the preceding claims, characterized in that said cooling means (15, 16, 17) comprise at least one air collection chamber (15) and at least one duct (16) for feeding air into said collection chamber (15), said delivery channel (17) being communicating with said collection chamber (15).
4. Head (4) according to claim 3, characterized in that said collection chamber (15) is arranged at the lower portion of said body (5).
5. Head (4) according to claim 2, 3 or 4, wherein said cooling means comprise at least one feed duct (16) which is at least partly extended along and enclosing a central symmetry axis (9) of said head (4), said feed duct (16) opening on the lower part or on the respective bottom at at least one delivery channel (17), said at least one delivery channel (17) opening towards said at least one tool (6).
6. Head according to claim 3 and 5 or 4 and 5, wherein said at least one feed duct (16) opens onto the bottom in said chamber (15) in a substantially lower central position of said head (4).
7. Head according to claim 5 or 6, wherein said at least one delivery channel (17) opens into a zone that is central, external and below (AZ) said head (4), so as to feed cooling air against the external surface of said at least one tool (6).
8. Head (4) according to one or more of the preceding claims when dependent on claim 3, characterized in that it comprises at least one closure element (19) sealingly associated with the lower portion of said body (5) and facing the air outlet mouth (20) defined by said feed duct (16), said collection chamber (15) being interposed between said closure element (19) and said body (5) .
9. Head (4) according to one or more of the preceding claims when dependent on claim 2, characterized in that it comprises a plurality of said tools
(6) and in that it comprises at least one of said delivery channels (17) for each of said tools (6).
10. Head according to claim 3 and 9 or 5 and 9, wherein said tools (6) are mounted around said at least one feed duct (16), in a manner such that cooling air can be centrally conveyed to said head (4) through said at least one feed duct (16), and from a central bottom position of said at least one feed duct (16) cooling air can be substantially radially conveyed through said delivery channels (17) towards said tools (6).
11. Head (4) according to one or more of the preceding claims, characterized in that said collection chamber (15) is laterally delimited by a wall (18) having substantially circular shape and in that said delivery channels (17) branch out from said wall (18).
12. Head (4) according to one or more of the preceding claims, characterized in that said body (5) can be rotated around a relative axis (9) and in that said delivery channels (17) are arranged tilted with respect to the rotation axis itself.
13. Head (4) according to one or more of the claims from 1 to 12, characterized in that said body (5) is drivable in rotation around a relative axis (9) and in that said delivery channels (17) are arranged substantially orthogonal to the rotation axis itself.
14. Head (4) according to one or more of the preceding claims when dependent on claim 3 or 5, characterized in that said rotation axis (9) corresponds to the longitudinal axis of said at least one feed duct (16).
15. Head (4) according to one or more of the preceding claims, characterized in that it comprises a bell-shaped element (25) or an annular element entirely or partly enclosing said main body (5) and delimiting, with the external surface of said main body (5), a zone for conveying cooling fluid towards an abutment surface.
16. Head (4) according to one or more of the preceding claims, characterized in that said zone for conveying fluid of said bell-shaped element (25) or annular element is fed, at an upper end thereof, by means of air and is intended to deliver air to the abutment surface, i.e. to a lower end of said bell-shaped element (25) or of said annular element.
17. Machinery (1) for working ceramic manufactured articles or natural stones, comprising a support frame (2) and at least one surface of abutment of the ceramic manufactured articles or of the natural stones associated with said support frame (2) and movable along an advancement direction (3), characterized in that it comprises at least one head (4) for smoothing the ceramic manufactured articles or the natural stones according to one or more of the preceding claims, said head (4) being arranged above said abutment surface.
18. Machinery (1) according to claim 17, characterized in that it comprises a plurality of said heads (4) associated with said support frame (2) and arranged one after the other along said advancement direction (3).
19. Machinery (1) according to claim 17 or 18, characterized in that it comprises means for suctioning the processing residues.
20. Machinery (1) according to one or more of the claims from 17 to 19, characterized in that said suction means are arranged on the side of said abutment surface with respect to the advancement direction (3) of the ceramic manufactured articles or of the natural stones.
21. Machinery (1) according to one or more of the claims from 16 to 19, characterized in that said suction means comprise at least one suction case (26) having a suction opening placed at the height of the interface surface between said at least one tool (6) and said abutment surface or directed towards such abutment surface.
EP16725219.6A 2015-03-25 2016-03-29 Head for polishing ceramic items or natural stones Withdrawn EP3274129A1 (en)

Applications Claiming Priority (2)

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ITUB20150043 2015-03-25
PCT/IB2016/051770 WO2016151561A1 (en) 2015-03-25 2016-03-29 Head for polishing ceramic items or natural stones

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US (1) US20180117726A1 (en)
EP (1) EP3274129A1 (en)
CN (1) CN107530861A (en)
BR (1) BR112017019967B1 (en)
WO (1) WO2016151561A1 (en)

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CN106514478A (en) * 2017-01-04 2017-03-22 广东鼎科技有限公司 Efficient polishing machine
IT201900001429A1 (en) * 2019-01-31 2020-07-31 Simec Spa CALIBRATION AND / OR SANDING HEAD
CN110253431A (en) * 2019-07-08 2019-09-20 佛山科学技术学院 A kind of inverted ceramic polishing bistrique of water-atomization cooling and ceramic polishing method
IT201900016721A1 (en) * 2019-09-19 2021-03-19 Simec Spa HEAD FOR A MACHINE TOOL FOR POLISHING AND / OR CALIBRATING SLABS IN STONE AND / OR CERAMIC MATERIAL
IT202200013069A1 (en) * 2022-06-21 2023-12-21 Comes Srl POLISHING HEAD

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US20180117726A1 (en) 2018-05-03
CN107530861A (en) 2018-01-02
BR112017019967A2 (en) 2018-06-19
BR112017019967B1 (en) 2021-06-22
WO2016151561A1 (en) 2016-09-29

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