WO2015192882A1 - Group and method for automatic classification and sorting of ceramic products - Google Patents

Group and method for automatic classification and sorting of ceramic products Download PDF

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Publication number
WO2015192882A1
WO2015192882A1 PCT/EP2014/062639 EP2014062639W WO2015192882A1 WO 2015192882 A1 WO2015192882 A1 WO 2015192882A1 EP 2014062639 W EP2014062639 W EP 2014062639W WO 2015192882 A1 WO2015192882 A1 WO 2015192882A1
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WO
WIPO (PCT)
Prior art keywords
products
sorting
image
ceramic products
group
Prior art date
Application number
PCT/EP2014/062639
Other languages
French (fr)
Inventor
Nigel Francis GEARING-THOMAS
Original Assignee
Jolyan Holding Sa
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 Jolyan Holding Sa filed Critical Jolyan Holding Sa
Priority to PCT/EP2014/062639 priority Critical patent/WO2015192882A1/en
Publication of WO2015192882A1 publication Critical patent/WO2015192882A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour

Definitions

  • the present invention relates to a group for automatic classification and sorting of ceramic products, such as tiles and the like.
  • baking kilns of the so-called roller type are conventionally used.
  • Such kilns comprise a tunnel support structure delimiting, between a feeding port for raw ceramic products to be baked and a discharging port for the baked products, a channel for the advancement and baking of the products on a roller conveyor.
  • a means for moving away products exiting from the kiln is generally provided, typically a so-called “discharging” roller conveyor, designed to receive the baked ceramic products exiting the kiln and convey them to the successive processing steps.
  • Such conveyor usually comprises a support structure on which a plurality of rollers is mounted, parallel and adjacent to each other and arranged transversely with respect to a direction of advancement A of the products.
  • the conveyor further comprises actuation means provided for simultaneously actuating the rollers so as to allow the advancement of the baked products, exiting the baking kiln at a preset speed.
  • a manual check of the baked ceramic products is usually carried out, with the aim of discarding the defective products and send the fit products towards the subsequent processing stations, for example for stacking, packaging in and/or palletizing, depending on the type, format, etc.
  • seats for manual sorting are provided, where the products to be sent towards the respective subsequent processing steps are placed, for example in suitable containers.
  • the main object of the present invention is to improve the state of the art in the field of kilns for baking ceramic products.
  • Another object of the present invention is to provide a group for the classification and sorting of ceramic products exiting a baking kiln, which allows the correct evaluation of products and thus the sort of the same .
  • a further object of the present invention is that of providing a group for the classification and sorting of ceramic products exiting a baking kiln, which group is capable of selecting and sorting the products exiting the baking kiln quickly.
  • Another object of the present invention is to provide a group for the classification and sorting of ceramic products exiting a baking kiln that is practical to obtain at competitive costs.
  • Not the least object of the present invention is to provide a method for the classification and sorting of ceramic products exiting a baking kiln, that is easy to implement .
  • a group for the classification and sorting of ceramic products exiting a baking kiln according to claim 1 is provided .
  • a method for the classification and sorting of ceramic products exiting from a baking kiln according to claim 9 is provided. Further advantageous characteristics of the classification and sorting group and the respective method of operation according to the present invention are described in the following claims.
  • figure 1 is a top view of a baking station provided with a group for the classification and sorting of ceramic products exiting a baking kiln according to the present invention.
  • a group for the classification and sorting of ceramic products is applicable to kilns F for baking conventional ceramic products, which are typically provided with moving means 3 for moving away the baked ceramic products 4 exiting the kiln F, for example one or more roller conveyors 3, and one or more seats 5 for sorting such products.
  • moving means 3 for moving away the products are provided, in use, to receive the baked ceramic products 4 exiting the kiln F and convey them according to a direction of advancement indicated in the figure through the arrows A.
  • seats 5 for the sorting of ceramic products exiting from the kiln F are provided, which seats can, for example, comprise one or more auxiliary conveyor lines 5a towards subsequent stations for processing the baked ceramic products, such as stacking/piling stations, packaging and/or palletizing stations, as well as one or more stacking stations or container means 5b intended, for example, to contain products to be discarded.
  • the auxiliary conveyor lines 5a are variously oriented with respect to moving means 3 for moving away the ceramic products exiting the kiln F, depending on the needs .
  • the group for the classification and sorting of ceramic products according to the present invention is generally indicated with reference number 1 and is arranged at the moving means 3 for moving away the baked products, preferably close to the discharge port of kiln F.
  • Such group comprises at least one means 6 for sorting the ceramic products towards the sorting seat or seats 5, arranged, for example, in proximity of moving means 3.
  • the sorting means 6 comprise one or more automatic means capable of picking up the baked ceramic products 4 from moving means 3, and placing them in the respective sorting seats 5a, 5b.
  • the sorting means 6 comprise a manipulator or robot of the anthropomorphic type, provided with one or more articulated arms 6a, each having a respective gripping end 6b, for example configured like a gripper and/or suctioning element, through which the ceramic products 4 are picked up and moved.
  • the man skilled in the art shall understand that any sorting means can be implemented, as long as they perform the same function.
  • the sorting means 6, as better observed hereinafter, move the baked ceramic products 4 on moving means 3 according to a classification of the products exiting kiln F, which classification is based on geometric- mechanical and/or chromatic characteristics of the products .
  • the classification and sorting group comprises means 7 for the automatic evaluation of ceramic products 4 on moving means 3 and, more particularly, means 7a for acquiring at least one image of such baked ceramic products moving on moving means 3 of the kiln F.
  • the image acquisition means 7a are designated to emit, in output, at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of the products subject of the at least one acquired image.
  • the automatic assessment means 7 further comprise a programme control unit 7b operatively connected in any suitable way to the sorting means 6 and adapted to process the signal emitted by the image acquisition means 7a. Based on the processing of such signal, the programme control unit 7b in turn emits, in output, signals suitable for controlling the aforementioned sorting means 6.
  • the image acquisition means 7a of the group for classification and sorting according to the present invention advantageously comprise at least one sensor means of the optoelectronic type.
  • sensor means can be, for example, a linear or matrix camera, arranged above moving means 3 both transversely, as illustrated in figure 1, or laterally with respect thereto.
  • the automatic assessment means 7 comprise at least one optical return means (for example one or more mirrors not illustrated in the figure) between moving means 3 for moving away the products and the optoelectronic sensor means 7a, so that the latter, regardless of the position thereof with respect to moving means 3, is always capable of acquiring at least one image of the baked ceramic products 4, which image is returned from the optical return means.
  • the image acquisition means 7a upon acquiring at least one image of the ceramic products 4 moving on the moving means 3, provide, in output, a suitable signal correlated to the characteristics of the image as acquired and, thus correlated to products 4 represented therein. Such signal is sent to the programme control unit 7b.
  • the programme control unit 7b is designed to receive the signal from the image acquisition means 7a and process such signal according to processing algorithms known to a man skilled in the art.
  • the programme control unit 7b allocates each product represented in the processed image, a classification index and sends at least one suitable control signal containing such index to the sorting means 6.
  • the classification of the products shall allow to advantageously distinguish the products to be discarded from those suitable for the subsequent processing (stacking/packaging/palletization/sale) and the various types and forms thereof.
  • the control signal sent to the sorting means 6 shall contain, with the classification index, also instructions regarding the sorting seat 5a, 5b towards which each product shall be moved.
  • the operation of the group for automatic classification and sorting of ceramic products described above is extremely simple and reliable. It is, in fact, provided to arrange at least one station for baking ceramic products, the station having such group for classification and sorting, to acquire at least one image of the baked ceramic products exiting the baking kiln F by using image acquisition means 7a.
  • the image acquisition means 7a shall emit at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of the image thus acquired and, accordingly, correlated to the products 4 represented therein. Such signal shall be forwarded to the programme control unit 7b.
  • a step of processing the signal thus acquired by the programme control unit 7b is provided, as well as a step of emitting, in output, at least one suitable signal for controlling the sorting means 6.
  • the sorting means 6 shall pick up each product 4 moving on moving means 3 and send it towards the respective sorting seat 5a, 5b.

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  • Tunnel Furnaces (AREA)
  • Sorting Of Articles (AREA)

Abstract

The present invention relates to a group for the classification and sorting of ceramic products exiting a baking kiln (F) provided with moving means (3) for moving away baked products (4) at the discharge port of the kiln (F), and at least one seat (5) for sorting said products (4), the seat being in proximity of the moving means (3), the group comprising at least one means (6) for sorting the ceramic products (4) from the moving means (3) to the at least one sorting seat (5); and means (7) for the automatic evaluation of the ceramic products (4) on the moving means (3), including image acquisition means (7a) for acquiring at least one image of the products and at least one programme control unit (7b) operatively connected to the at least one sorting means (6). The image acquisition means (7a) acquires at least one image of the ceramic products on the moving means (3) and emits, in output, at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of said products (4) and the at least one programme control unit (7b) receives and processes the signal and emits, in output, at least one suitable signal for controlling the sorting means (6), in response to which the sorting means (6) shall proceed to sort each product (4) towards at least one of the sorting seat (5).

Description

GROUP AND METHOD FOR AUTOMATIC CLASSIFICATION AND SORTING OF
CERAMIC PRODUCTS
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a group for automatic classification and sorting of ceramic products, such as tiles and the like.
BACKGROUND ART
In the ceramic products production field, baking kilns of the so-called roller type are conventionally used. Such kilns comprise a tunnel support structure delimiting, between a feeding port for raw ceramic products to be baked and a discharging port for the baked products, a channel for the advancement and baking of the products on a roller conveyor.
At the discharge port of the kiln for baking ceramic material a means for moving away products exiting from the kiln is generally provided, typically a so-called "discharging" roller conveyor, designed to receive the baked ceramic products exiting the kiln and convey them to the successive processing steps.
Such conveyor usually comprises a support structure on which a plurality of rollers is mounted, parallel and adjacent to each other and arranged transversely with respect to a direction of advancement A of the products. The conveyor further comprises actuation means provided for simultaneously actuating the rollers so as to allow the advancement of the baked products, exiting the baking kiln at a preset speed.
Outside the baking kiln a manual check of the baked ceramic products is usually carried out, with the aim of discarding the defective products and send the fit products towards the subsequent processing stations, for example for stacking, packaging in and/or palletizing, depending on the type, format, etc. To such purpose, seats for manual sorting are provided, where the products to be sent towards the respective subsequent processing steps are placed, for example in suitable containers.
Besides being demanding from both a financial and a time duration point of view, in some cases such a manual control may not be entirely efficient in that it is subject of the subjective evaluation of the operator or operators designated to evaluate the products. Some production defects, for example unevenness in the thickness of the products, are not easily noticeable.
OBJECTS OF THE INVENTION
The main object of the present invention is to improve the state of the art in the field of kilns for baking ceramic products.
Another object of the present invention is to provide a group for the classification and sorting of ceramic products exiting a baking kiln, which allows the correct evaluation of products and thus the sort of the same .
A further object of the present invention is that of providing a group for the classification and sorting of ceramic products exiting a baking kiln, which group is capable of selecting and sorting the products exiting the baking kiln quickly.
Still, another object of the present invention is to provide a group for the classification and sorting of ceramic products exiting a baking kiln that is practical to obtain at competitive costs.
Not the least object of the present invention is to provide a method for the classification and sorting of ceramic products exiting a baking kiln, that is easy to implement .
According to a first aspect of the present invention a group for the classification and sorting of ceramic products exiting a baking kiln according to claim 1 is provided .
According to a second aspect of the present invention a method for the classification and sorting of ceramic products exiting from a baking kiln according to claim 9 is provided. Further advantageous characteristics of the classification and sorting group and the respective method of operation according to the present invention are described in the following claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Further aspects and advantages of the present invention shall be clearer from the following detailed description of some of the currently preferred embodiments thereof, illustrated purely by way of non- limiting example in the attached drawing, wherein:
figure 1 is a top view of a baking station provided with a group for the classification and sorting of ceramic products exiting a baking kiln according to the present invention.
EMBODIMENTS OF THE INVENTION
First, with reference to the attached figure 1, it is observed that a group for the classification and sorting of ceramic products, according to the present invention, is applicable to kilns F for baking conventional ceramic products, which are typically provided with moving means 3 for moving away the baked ceramic products 4 exiting the kiln F, for example one or more roller conveyors 3, and one or more seats 5 for sorting such products. As known, moving means 3 for moving away the products are provided, in use, to receive the baked ceramic products 4 exiting the kiln F and convey them according to a direction of advancement indicated in the figure through the arrows A. In proximity of the moving means 3 one or more seats 5 for the sorting of ceramic products exiting from the kiln F are provided, which seats can, for example, comprise one or more auxiliary conveyor lines 5a towards subsequent stations for processing the baked ceramic products, such as stacking/piling stations, packaging and/or palletizing stations, as well as one or more stacking stations or container means 5b intended, for example, to contain products to be discarded.
The auxiliary conveyor lines 5a are variously oriented with respect to moving means 3 for moving away the ceramic products exiting the kiln F, depending on the needs .
The group for the classification and sorting of ceramic products according to the present invention is generally indicated with reference number 1 and is arranged at the moving means 3 for moving away the baked products, preferably close to the discharge port of kiln F. Such group comprises at least one means 6 for sorting the ceramic products towards the sorting seat or seats 5, arranged, for example, in proximity of moving means 3. The sorting means 6 comprise one or more automatic means capable of picking up the baked ceramic products 4 from moving means 3, and placing them in the respective sorting seats 5a, 5b.
Preferably, the sorting means 6 comprise a manipulator or robot of the anthropomorphic type, provided with one or more articulated arms 6a, each having a respective gripping end 6b, for example configured like a gripper and/or suctioning element, through which the ceramic products 4 are picked up and moved. The man skilled in the art shall understand that any sorting means can be implemented, as long as they perform the same function. The sorting means 6, as better observed hereinafter, move the baked ceramic products 4 on moving means 3 according to a classification of the products exiting kiln F, which classification is based on geometric- mechanical and/or chromatic characteristics of the products .
For such purpose, the classification and sorting group according to the present invention comprises means 7 for the automatic evaluation of ceramic products 4 on moving means 3 and, more particularly, means 7a for acquiring at least one image of such baked ceramic products moving on moving means 3 of the kiln F. The image acquisition means 7a are designated to emit, in output, at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of the products subject of the at least one acquired image. The automatic assessment means 7 further comprise a programme control unit 7b operatively connected in any suitable way to the sorting means 6 and adapted to process the signal emitted by the image acquisition means 7a. Based on the processing of such signal, the programme control unit 7b in turn emits, in output, signals suitable for controlling the aforementioned sorting means 6.
The image acquisition means 7a of the group for classification and sorting according to the present invention advantageously comprise at least one sensor means of the optoelectronic type. Such sensor means can be, for example, a linear or matrix camera, arranged above moving means 3 both transversely, as illustrated in figure 1, or laterally with respect thereto. In the latter case, the automatic assessment means 7 comprise at least one optical return means (for example one or more mirrors not illustrated in the figure) between moving means 3 for moving away the products and the optoelectronic sensor means 7a, so that the latter, regardless of the position thereof with respect to moving means 3, is always capable of acquiring at least one image of the baked ceramic products 4, which image is returned from the optical return means.
The image acquisition means 7a, upon acquiring at least one image of the ceramic products 4 moving on the moving means 3, provide, in output, a suitable signal correlated to the characteristics of the image as acquired and, thus correlated to products 4 represented therein. Such signal is sent to the programme control unit 7b.
The programme control unit 7b is designed to receive the signal from the image acquisition means 7a and process such signal according to processing algorithms known to a man skilled in the art.
Based on the performed processing, the programme control unit 7b allocates each product represented in the processed image, a classification index and sends at least one suitable control signal containing such index to the sorting means 6.
The classification of the products shall allow to advantageously distinguish the products to be discarded from those suitable for the subsequent processing (stacking/packaging/palletization/sale) and the various types and forms thereof. The control signal sent to the sorting means 6 shall contain, with the classification index, also instructions regarding the sorting seat 5a, 5b towards which each product shall be moved. The operation of the group for automatic classification and sorting of ceramic products described above is extremely simple and reliable. It is, in fact, provided to arrange at least one station for baking ceramic products, the station having such group for classification and sorting, to acquire at least one image of the baked ceramic products exiting the baking kiln F by using image acquisition means 7a. The image acquisition means 7a shall emit at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of the image thus acquired and, accordingly, correlated to the products 4 represented therein. Such signal shall be forwarded to the programme control unit 7b.
Thus, a step of processing the signal thus acquired by the programme control unit 7b is provided, as well as a step of emitting, in output, at least one suitable signal for controlling the sorting means 6.
According to the received control signal, the sorting means 6 shall pick up each product 4 moving on moving means 3 and send it towards the respective sorting seat 5a, 5b.
The group for the classification and sorting of ceramic products exiting a baking kiln F and the respective operating method described above are subject to numerous modifications and variants within the scope the following claims.

Claims

1. Group for the classification and sorting of ceramic products exiting a baking kiln (F) provided with moving means (3) for moving away said baked products (4) at the discharge port of said kiln (F) , and at least one seat (5) for sorting said products (4), said seat being in proximity of said moving means (3), said group comprising:
at least one means (6) for sorting said ceramic products (4) from said moving means (3) to said at least one sorting seat (5) ; and
means (7) for the automatic evaluation of said ceramic products (4) on said moving means (3), including image acquisition means (7a) for acquiring at least one image of said products and at least one programme control unit (7b) operatively connected to said at least one sorting means (6);
said image acquisition means (7a) being intended to acquire at least one image of said ceramic products on said moving means (3) and emit, in output, at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of said products (4) and said at least one programme control unit (7b) being adapted to receive and process said signal correlated to the geometric-mechanical and/or chromatic characteristics of said products (4) and emit, in output, at least one suitable signal for controlling said sorting means (6), in response to which said sorting means (6) shall proceed to sort each product (4) towards at least one said sorting seat (5) .
2. Group according to claim 1, wherein said image acquisition means (7a) for acquiring at least one image of said products (4) comprise at least one sensor means of the optoelectronic type.
3. Group according to claim 2, wherein said sensor means of the optoelectronic type is a linear or matrix camera .
4. Group according to claim 2 or 3, wherein said means (7a) for acquiring at least one image of said products are arranged, in use, transversely above said moving means (3) .
5. Group according to claim 2 or 3, wherein said image acquisition means (7a) for acquiring at least one image of said products are arranged laterally with respect to said moving means (3) .
6. Group according to claim 5, comprising at least return means between said at least one moving means (3) and said means (7a) for acquiring at least one image of said products (4), so that said image acquisition means (7a) can acquire at least one image of said ceramic products (4) returned from said return means.
7. Group according to claim 6, wherein said return means comprise at least one mirror angularly arranged between said moving means (3) and said image acquisition means (7a) for acquiring at least one image of said products (4) .
8. Group according to any one of claims 1 to 7, wherein said sorting means (6) comprise at least one anthropomorphic manipulator.
9. Method of classification and sorting of ceramic products exiting from a baking kiln (F) comprising the following operating steps in sequence:
providing at least one station for baking ceramic products provided with a group of classification and sorting (1) according to any claim 1 to 8 ;
acquisition of at least one image of said baked ceramic products (4) exiting said baking kiln (F) by said image acquisition means (7a) and emission of at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of said products;
- processing said at least one signal correlated to the geometric-mechanical and/or chromatic characteristics of said products (4) by said at least one programme control unit (7b) and emission, in output, of at least one suitable signal for controlling said sorting means ( 6) ; and
- sorting, by said sorting means (6), of said products (4) according to said at least one control signal.
10. Method according to claim 9, wherein said step of processing said at least one signal by said at least one programme control unit (7b) comprises the generation of a classification index for each product represented in said acquired image.
PCT/EP2014/062639 2014-06-17 2014-06-17 Group and method for automatic classification and sorting of ceramic products WO2015192882A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109261531A (en) * 2018-10-30 2019-01-25 福建省亿顺机械设备有限公司 Stacking baling line based on intelligent sorting
FR3081745A1 (en) * 2018-03-01 2019-12-06 D & S DEVICE FOR SELECTING FACTORY PARTS
EP3718649A1 (en) * 2019-04-03 2020-10-07 SR-Schindler Maschinen - Anlagetechnik GmbH Plate production system with sorting device and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8100234A (en) * 1981-01-19 1982-08-16 Boer Maschf Bv Brick sorting installation for firing furnace - sorts and stacks after firing using bar pushing top layer on lifting device onto intermediate transporter
WO1994028397A1 (en) * 1993-05-28 1994-12-08 Axiom Bildverarbeitungssysteme Gmbh An automatic inspection apparatus
WO2002060605A1 (en) * 2001-01-30 2002-08-08 E.L.C.O.S. S.R.L. Method of classifying the aesthetic quality of planar materials, and system for automatically sorting planar materials using such a method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8100234A (en) * 1981-01-19 1982-08-16 Boer Maschf Bv Brick sorting installation for firing furnace - sorts and stacks after firing using bar pushing top layer on lifting device onto intermediate transporter
WO1994028397A1 (en) * 1993-05-28 1994-12-08 Axiom Bildverarbeitungssysteme Gmbh An automatic inspection apparatus
WO2002060605A1 (en) * 2001-01-30 2002-08-08 E.L.C.O.S. S.R.L. Method of classifying the aesthetic quality of planar materials, and system for automatically sorting planar materials using such a method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3081745A1 (en) * 2018-03-01 2019-12-06 D & S DEVICE FOR SELECTING FACTORY PARTS
CN109261531A (en) * 2018-10-30 2019-01-25 福建省亿顺机械设备有限公司 Stacking baling line based on intelligent sorting
EP3718649A1 (en) * 2019-04-03 2020-10-07 SR-Schindler Maschinen - Anlagetechnik GmbH Plate production system with sorting device and method

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