EP0968946A1 - System for inserting cores in the winding cradle of a web material re-winding machine - Google Patents
System for inserting cores in the winding cradle of a web material re-winding machine Download PDFInfo
- Publication number
- EP0968946A1 EP0968946A1 EP99109429A EP99109429A EP0968946A1 EP 0968946 A1 EP0968946 A1 EP 0968946A1 EP 99109429 A EP99109429 A EP 99109429A EP 99109429 A EP99109429 A EP 99109429A EP 0968946 A1 EP0968946 A1 EP 0968946A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- eccentric body
- cores
- core
- winding
- arm
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
- B65H19/2238—The web roll being driven by a winding mechanism of the nip or tangential drive type
- B65H19/2269—Cradle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/417—Handling or changing web rolls
- B65H2301/418—Changing web roll
- B65H2301/4182—Core or mandrel insertion, e.g. means for loading core or mandrel in winding position
- B65H2301/41824—Core or mandrel insertion, e.g. means for loading core or mandrel in winding position from below, e.g. between rollers of winding bed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2408/00—Specific machines
- B65H2408/20—Specific machines for handling web(s)
- B65H2408/23—Winding machines
- B65H2408/235—Cradles
Definitions
- the present invention relates to a system for inserting cores into the winding cradle of a re-winding machine for web material such as paper and the like.
- Re-winding machines unwind large rolls of web material, to produce a plurality of logs, of a pre-set diameter, that are then cut transversally to obtain rolls of the desired length.
- the logs are formed around a tubular core.
- the most widely utilized method at present is so-called free winding between three cylinders.
- the core is inserted, by means of inserting arms, in the cradle formed between three cylinders with parallel axes, which set it in rotational motion, causing winding thereon of the web material.
- the log Once the log has been formed it is ejected and a new core is then inserted.
- the three cylinders normally turn at a constant speed during winding of the log, and at different speeds during insertion of the new core and ejection of the formed log.
- the diameters of the commercial cores normally used are variable in size.
- the range of variation of the core diameters normally goes from 30 mm to 100 mm. Cores of small diameter are used for rolls of web material intended for domestic use, while cores of larger sizes are reserved for industrial use.
- the object of the present invention is to eliminate these drawbacks by providing a core insertion system for winding web material into rolls on re-winding machines that is versatile, economical and simple to make.
- the core inserting arms In the core insertion system according to the invention, provision is made for the core inserting arms to be mounted on eccentric bodies.
- the arm rotating shaft is driven by means of a cam the profile of which is adapted to the work cycle of the machine.
- the eccentric shaft which allows the axis of rotation of the inserting arms to be moved, consists of a torsion bar that can be operated manually, semi-automatically by means of a geared motor or automatically by means of an encoder.
- a disc with a graduated scale on which the reference diameters of the cores are engraved can be provided.
- the eccentric shaft by turning the eccentric shaft, according to the diameter of the core to be inserted, it is possible to modify the path of movement of the inserting arm, which thus pushes the core to be inserted exactly at its axis and always maintains an appropriate path to avoid pushing the core beyond the line joining the axes of the winding and inserting cylinders.
- the cores 1 are made to slide on a conveyor belt or a loading channel having guides 2 in the form of an inclined surface.
- An inserting arm 3 is curved in shape and has at its free end a plurality of rollers 4 (only one of which can be seen in the figure) consisting of idle mounted cylindrical rollers. The rollers 4 push the cores 1 into a winding cradle formed between three cylinders 6, 7, 8, where the web material is wound.
- the cylinder 6 is fixedly mounted.
- the cylinder 7 can be fixed or guided by rocker arms to adjust the distance between the skirts of cylinders 6 and 7.
- the cylinder 8, commonly known as the pressure cylinder, exerts pressure on the log being formed and is supported by a pair of rocker arms 20, so as to be able to follow the increase in diameter of the log.
- the inserting arm 3 is pivoted at the centre of an eccentric body 9, on an axis identified by letter A in the figures.
- the eccentric body 9 is in turn pivoted on an axis B at a distance ⁇ from the axis A.
- the distance ⁇ between the fulcrum A of the inserting arm 3 and the fulcrum B of the eccentric body 9 gives the eccentricity of the system.
- the eccentricity ⁇ can be selected as about 30 mm.
- a second arm 10 is pivoted integrally to the inserting arm 3 at A.
- a follower 11 is provided that follows the profile of a cam 12, rotation of which prevents a rocking movement of the inserting arm 3, so that the end rollers 4 follow such a path as to push the core 1 at its midline.
- the eccentric body 9 is made to turn around its fulcrum B by means of a connecting rod 14 and crank 13 system.
- the system illustrated is purely by way of example and any other system can be adopted.
- the drive means can be manual, such as a handwheel for example, semi-automatic such as a geared motor or preferably automatic such as an encoder, for example, in which the measurement of the core diameter is entered and on the basis of this information the correct rotation of the eccentric body 9 is automatically set in motion.
- An indicator 15 that points to a graduated scale 16 can be combined with the eccentric body 9. All the possible measurements of core diameters are indicated on the graduated scale 16. Such a measurement range normally goes from 30 mm to 100 mm.
Landscapes
- Replacement Of Web Rolls (AREA)
Abstract
Description
- The present invention relates to a system for inserting cores into the winding cradle of a re-winding machine for web material such as paper and the like.
- Re-winding machines unwind large rolls of web material, to produce a plurality of logs, of a pre-set diameter, that are then cut transversally to obtain rolls of the desired length.
- According to a very widespread method, the logs are formed around a tubular core.
- The most widely utilized method at present is so-called free winding between three cylinders. The core is inserted, by means of inserting arms, in the cradle formed between three cylinders with parallel axes, which set it in rotational motion, causing winding thereon of the web material. Once the log has been formed it is ejected and a new core is then inserted.
- The three cylinders normally turn at a constant speed during winding of the log, and at different speeds during insertion of the new core and ejection of the formed log.
- The diameters of the commercial cores normally used are variable in size. The range of variation of the core diameters normally goes from 30 mm to 100 mm. Cores of small diameter are used for rolls of web material intended for domestic use, while cores of larger sizes are reserved for industrial use.
- In known machines, when a change in production has to be made, the machine must be stopped for about 4-6 hours to switch from large-diameter to small-diameter cores or vice versa. In fact, besides adjustments to the various parts of the machine, the core inserting arm must be replaced with another arm of a suitable size to push the core exactly at its axis.
- It is obvious that the core inserting system used in winding machines according to the prior art lacks versatility and is anti-economical. In fact, each time the core size is to be changed, production must inevitably be stopped for a long time, and it is necessary to have a wide range of inserting arms available, according to the diameters of the cores used.
- The object of the present invention is to eliminate these drawbacks by providing a core insertion system for winding web material into rolls on re-winding machines that is versatile, economical and simple to make.
- This object is achieved, according to the invention, with the characteristics listed in appended
independent claim 1. - Preferred embodiments of the invention are apparent from the dependent claims.
- In the core insertion system according to the invention, provision is made for the core inserting arms to be mounted on eccentric bodies. The arm rotating shaft is driven by means of a cam the profile of which is adapted to the work cycle of the machine. The eccentric shaft, which allows the axis of rotation of the inserting arms to be moved, consists of a torsion bar that can be operated manually, semi-automatically by means of a geared motor or automatically by means of an encoder.
- Alongside the eccentric shaft, a disc with a graduated scale on which the reference diameters of the cores are engraved can be provided. In this manner, by turning the eccentric shaft, according to the diameter of the core to be inserted, it is possible to modify the path of movement of the inserting arm, which thus pushes the core to be inserted exactly at its axis and always maintains an appropriate path to avoid pushing the core beyond the line joining the axes of the winding and inserting cylinders.
- As it is apparent from this brief description, with the core inserting system according to the invention, it is not necessary to interrupt production when wishing to change the diameter of the core to be inserted. In fact in this case it is sufficient to turn the eccentric shaft manually or automatically so that the inserting arm pushes the new core exactly at its axis.
- Further characteristics of the invention will be made clearer by the detailed description that follows, referring to a purely exemplary and therefore non-limiting embodiment, illustrated in the appended drawings in which:
- Figure 1 is a diagrammatic side elevation view of the core inserting system according to the invention, set to work with cores having a small diameter;
- Figure 2 is diagrammatic view, as in Figure 1, of the core inserting system, set to work with cores having a large diameter;
- Figure 3 is a further diagrammatic side view of the core inserting system according to the invention, showing an example of movement of the eccentric body.
-
- The core inserting system according to the invention will be described with the aid of the figures.
- With reference to Figure 1, a core inserting system set to work with
cores 1 of small diameter, normally consisting of a cardboard or plastic tube, is considered. Thecores 1 are made to slide on a conveyor belt or a loadingchannel having guides 2 in the form of an inclined surface. Aninserting arm 3 is curved in shape and has at its free end a plurality of rollers 4 (only one of which can be seen in the figure) consisting of idle mounted cylindrical rollers. Therollers 4 push thecores 1 into a winding cradle formed between threecylinders - The
cylinder 6 is fixedly mounted. Thecylinder 7 can be fixed or guided by rocker arms to adjust the distance between the skirts ofcylinders cylinder 8, commonly known as the pressure cylinder, exerts pressure on the log being formed and is supported by a pair ofrocker arms 20, so as to be able to follow the increase in diameter of the log. - The
inserting arm 3 is pivoted at the centre of aneccentric body 9, on an axis identified by letter A in the figures. Theeccentric body 9 is in turn pivoted on an axis B at a distance ε from the axis A. The distance ε between the fulcrum A of theinserting arm 3 and the fulcrum B of theeccentric body 9 gives the eccentricity of the system. Purely by way of example, in a preferred embodiment of the invention, the eccentricity ε can be selected as about 30 mm. - A
second arm 10 is pivoted integrally to theinserting arm 3 at A. At the free end of thearm 10, afollower 11 is provided that follows the profile of acam 12, rotation of which prevents a rocking movement of theinserting arm 3, so that theend rollers 4 follow such a path as to push thecore 1 at its midline. - With reference to Figure 2, when it is necessary to change production and insert a core 1' with a larger diameter than that of the
core 1, the axis of therollers 4 must be moved correspondingly so that the rollers always act at the midline of the core. Furthermore the stroke of the inserting arm must be reduced to prevent the axis C of the core 1' from passing the line d that joins the axes Y and Z of the twocylinders cylinder 6 is greater than in the case in Figure 1. In order for the axis of therollers 4 to be situated at the same height as the axis of the core 1', it is therefore necessary for theinserting arm 3 to be moved correspondingly. This movement and stroke adjustment of thearm 3 are obtained by turning theeccentric body 9 around its fulcrum B, so that the fulcrum A of theinserting arm 3 is moved such a distance as to allow the axis of therollers 4 to be aligned with the midline of the core 1'. - As shown in Figure 3, the
eccentric body 9 is made to turn around its fulcrum B by means of a connectingrod 14 andcrank 13 system. The system illustrated is purely by way of example and any other system can be adopted. In particular the drive means can be manual, such as a handwheel for example, semi-automatic such as a geared motor or preferably automatic such as an encoder, for example, in which the measurement of the core diameter is entered and on the basis of this information the correct rotation of theeccentric body 9 is automatically set in motion. - An
indicator 15 that points to a graduatedscale 16 can be combined with theeccentric body 9. All the possible measurements of core diameters are indicated on the graduatedscale 16. Such a measurement range normally goes from 30 mm to 100 mm. - When a core of a pre-set diameter is to be inserted, it is sufficient to control the rotation of the eccentric 9 around its fulcrum axis B, so that the
indicator 15 points to the predetermined core diameter on the graduatedscale 16. - It is therefore evident that the invention enables the
core inserting arms 3 to be set extremely easily and rapidly to any core diameter.
Claims (9)
- A system for inserting cores (1, 1') in the winding cradle formed by a set of three cylinders (6, 7, 8) of a web material re-winding machine, comprising at least one inserting arm (3), provided with a plurality of terminal idle rollers (4), driven with a rocking movement, so that said rollers (4) sequentially push the cores (1, 1') into said winding cradle, characterized in that said inserting arm (3) is pivoted on an eccentric body (9), so that one rotation of said eccentric body (9) causes a variation in the absolute position of the arm (3), so that the rollers (4) can always exert their action at the midline of the cores (1, 1'), adapting to the diameter thereof.
- A system according to claim 1, characterized in that the fulcrum axis (A) of said inserting arm (3) is situated substantially at the centre of said eccentric body (9), and the fulcrum axis (B) of said eccentric body is at a distance (ε) from said fulcrum (A) of the inserting arm (3), the distance (ε) defining the eccentricity of said eccentric body (9).
- A system according to claim 2, characterized in that said eccentricity (ε) ranges from 5 mm to 100 mm.
- A system according to claim 1, characterized in that said eccentric body (9) is made to rotate around its own fulcrum (B) by means of a connecting rod (14) and crank (13) system.
- A system according to any one of the preceding claims, characterized in that said eccentric body (9) can be operated manually.
- A system according to any one of claims 1-4, characterized in that said eccentric body (9) can be operated semi-automatically, by means of a geared motor.
- A system according to any one of claims 1-4, characterized in that said eccentric body (9) is operated by means of an automatic encoder interfaced with a computer in which the core diameters (1, 1') are pre-set.
- A system according to claim 1, characterized in that combined with said eccentric body (9) is a graduated scale (16) in which the various possible core diameters (1, 1') are indicated, in order to facilitate adjustment of the rotation of the eccentric body (9).
- A re-winding machine for web material, characterized in that it comprises a system for inserting cores into the winding cradle according to any one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT98MI001515A ITMI981515A1 (en) | 1998-07-01 | 1998-07-01 | SYSTEM FOR INTRODUCING THE CORE INTO THE WINDING CRADLE OF A SHEET MATERIAL REWINDING MACHINE |
ITMI981515 | 1998-07-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0968946A1 true EP0968946A1 (en) | 2000-01-05 |
EP0968946B1 EP0968946B1 (en) | 2003-03-12 |
Family
ID=11380365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99109429A Expired - Lifetime EP0968946B1 (en) | 1998-07-01 | 1999-05-11 | System for inserting cores in the winding cradle of a web material re-winding machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0968946B1 (en) |
AT (1) | ATE234255T1 (en) |
DE (1) | DE69905802T2 (en) |
ES (1) | ES2190627T3 (en) |
IT (1) | ITMI981515A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015034676A1 (en) * | 2013-09-09 | 2015-03-12 | The Procter & Gamble Company | A surface winder having a cam-controlled core inserter |
WO2016016374A1 (en) * | 2014-07-31 | 2016-02-04 | Fabio Perini S.P.A. | Rewinding machine and method for producing logs of web material |
US10427902B2 (en) | 2016-03-04 | 2019-10-01 | The Procter & Gamble Company | Enhanced introductory portion for a surface winder |
US10427903B2 (en) | 2016-03-04 | 2019-10-01 | The Procter & Gamble Company | Leading edge device for a surface winder |
US10442649B2 (en) | 2016-03-04 | 2019-10-15 | The Procter & Gamble Company | Surface winder for producing logs of convolutely wound web materials |
US11148895B2 (en) | 2014-07-31 | 2021-10-19 | Fabio Perini S.P.A. | Rewinding machine and method of producing logs of web material |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0387214A2 (en) * | 1989-03-09 | 1990-09-12 | FABIO PERINI S.p.A. | Rewinding machine for the formation of rolls of paper or the like |
JPH04317946A (en) * | 1991-04-17 | 1992-11-09 | Tokushichi Yamazaki | Toilet paper polling device |
EP0524158A1 (en) * | 1991-07-16 | 1993-01-20 | FABIO PERINI S.p.A. | Method for producing rolls or logs of web material and machine for implementing said method |
EP0853060A1 (en) * | 1997-01-10 | 1998-07-15 | Italconverting srl | Machine and method for producing logs of sheet material |
-
1998
- 1998-07-01 IT IT98MI001515A patent/ITMI981515A1/en unknown
-
1999
- 1999-05-11 AT AT99109429T patent/ATE234255T1/en not_active IP Right Cessation
- 1999-05-11 EP EP99109429A patent/EP0968946B1/en not_active Expired - Lifetime
- 1999-05-11 ES ES99109429T patent/ES2190627T3/en not_active Expired - Lifetime
- 1999-05-11 DE DE69905802T patent/DE69905802T2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0387214A2 (en) * | 1989-03-09 | 1990-09-12 | FABIO PERINI S.p.A. | Rewinding machine for the formation of rolls of paper or the like |
JPH04317946A (en) * | 1991-04-17 | 1992-11-09 | Tokushichi Yamazaki | Toilet paper polling device |
EP0524158A1 (en) * | 1991-07-16 | 1993-01-20 | FABIO PERINI S.p.A. | Method for producing rolls or logs of web material and machine for implementing said method |
EP0853060A1 (en) * | 1997-01-10 | 1998-07-15 | Italconverting srl | Machine and method for producing logs of sheet material |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 017, no. 144 (M - 1386) 23 March 1993 (1993-03-23) * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015034676A1 (en) * | 2013-09-09 | 2015-03-12 | The Procter & Gamble Company | A surface winder having a cam-controlled core inserter |
WO2015035345A1 (en) * | 2013-09-09 | 2015-03-12 | The Procter & Gamble Company | A cam-controlled core inserter for a surface winder |
US9376282B2 (en) | 2013-09-09 | 2016-06-28 | The Procter & Gamble Company | Surface winder having a cam-controlled core inserter |
US9695003B2 (en) | 2013-09-09 | 2017-07-04 | The Procter & Gamble Company | Surface winder having a cam-controlled core inserter |
WO2016016374A1 (en) * | 2014-07-31 | 2016-02-04 | Fabio Perini S.P.A. | Rewinding machine and method for producing logs of web material |
CN106715300A (en) * | 2014-07-31 | 2017-05-24 | 法比奥·泼尼股份公司 | Rewinding machine and method for producing logs of web material |
AU2015295292B2 (en) * | 2014-07-31 | 2019-09-19 | Fabio Perini S.P.A. | Rewinding machine and method for producing logs of web material |
US11148895B2 (en) | 2014-07-31 | 2021-10-19 | Fabio Perini S.P.A. | Rewinding machine and method of producing logs of web material |
US10427902B2 (en) | 2016-03-04 | 2019-10-01 | The Procter & Gamble Company | Enhanced introductory portion for a surface winder |
US10427903B2 (en) | 2016-03-04 | 2019-10-01 | The Procter & Gamble Company | Leading edge device for a surface winder |
US10442649B2 (en) | 2016-03-04 | 2019-10-15 | The Procter & Gamble Company | Surface winder for producing logs of convolutely wound web materials |
Also Published As
Publication number | Publication date |
---|---|
DE69905802D1 (en) | 2003-04-17 |
ES2190627T3 (en) | 2003-08-01 |
DE69905802T2 (en) | 2004-03-04 |
EP0968946B1 (en) | 2003-03-12 |
ATE234255T1 (en) | 2003-03-15 |
ITMI981515A1 (en) | 2000-01-01 |
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