| WO2006126229A1 | 2006-11-30 | |||
| WO2002051601A2 | 2002-07-04 | |||
| WO2001072484A1 | 2001-10-04 |
| US6123002A | 2000-09-26 | |||
| US1813340A | 1931-07-07 |
| CLAIMS 1) The sequential log saw includes at least the feeding group χ and one cutting group Y, the log feeding group χ can be divided in three / four parts one possible realization is shown in the table 1 where at least one feeding group is divided in at least four parts χι - χ2 - χ3 - X4 situated at 90° one from the other, on each part χΊ - χ2 - χ3 - χ can be assembled one, two or more hands rows D electro pneumatic or magnetic for the automatic locking of the log having various diameter from at least 85mm up to at least 130mm and more for toilet paper and kitchen towel and from at least 110mm up to at least 450mm and more for industrial rolls, position χΊ log charging, position χ_ log cutting, position χ3 cut rolls discharging into the evacuation belt, position χ4 rest position hands D all open, intermediate position χ3 - χ4 end trims discharging all this is done without stopping the hands D, the cutting group Y is composed of a series of arms C carrying circular motorized blades B or not motorized carrying blades at shape with cutting profile of various cut, the arms are connected to the central body A on dovetail guides, on each arm is assembled the blade sharpening group G, the group H of arms stretching C and the axial regulation group H according to the axe Z of the central body A. 2) The sequential log saw according to the claim 1 is characterized that can cut either with circular blades B individually motorized on the self axe assembled on arms C that turn all together around the axe Z of the central body, nor can cut even with other type of knives at blades sector, not circular, properly shaped not motorized but keyed directly on arms C that in turn turn all together around the axe Z of the central body. 3) The sequential log saw according to the claims 1 and 2 is characterized with the electro magnetic and pneumatic hands D and close logs of various diameters, from at least 85mm up to 450mm and more, automatically, during the sequential cutting phase the pressure that the hand D makes on the previously cut roll decrease of the necessary quantity to let axially slide the cut roll while is in operation the following cutting this during the sequential cutting. 4) The sequential log saw according to claims 1 and 2 is characterized that the first cut is done with the first single blade and immediately after the other cutting with the second single blade in sequence, in a way that when the first cut is done it starts immediately after the second, when the second is finished it starts the third, and so on for the other following blades which are axially split-leveled mounted and radially split-leveled on the central body A with axe Z, the time that elapses between the end of a cut and the starting of the following cut can vary from 0 up to at least 0,2 seconds and more, during the whole cutting phases the log remains always still. 5) The sequential log saw according to claims 1 and 2 is characterized with arms carrying blades B (circular motorized or blade sectors non motorized at shape and properly obtained) completely independent one from the other and are assembled according one straight line, on the central body with axe Z, the blades B are on only one line and because there are not radially split- leveled but only axially split-leveled according to the axe Z in function of the set cutting length. 6) The sequential log saw according to claims 1 and 2 is characterized with arms C carrying blades B (circular motorized or blades sectors, non motorized shaped and properly obtained) split-level assembled in radial sense and split-leveled in axial sense on the central body A axe Z till finishing the complete turn of the central body A, only leaving the necessary space, between the last blade B of the complete turn and the first blade B of the following turn, to position the channels or hands D (containing at least 1-2-3 and other log) into the position of rolls cutting, the axial and radial split-level of the arms C can be of various versions, it depends mainly from the length of the roll to be cut and from the number of blades that have to cut simultaneously. 7) The sequential log saw according to claims 1 and 2 is characterized with the cut sequence from one extremity to the other of the log with simultaneous cutting of the two blades B, each on independent arm C, with log always still, the arms C carrying blade B (circular motorized or at cutting sectors not motorized with shape properly obtained) assembled axially split-leveled according to axe Z and radially split-leveled in the sequence of 2 in two, three in three and more in sequence, starting from one extremity of the log allowing respectively to make sequential cutting (by two, three in three, four in four, etc.) from one extremity to the other extremity of the log or the cutting sequence can starts from the centre of the log and finish at the extremities of the log. 8) The sequential log saw according to claims 1 and 2 is characterized with the cutting sequence from the two extremities of the log towards the centre of the log with two blades for each extremity which cut simultaneously, log are always still, arms C carrying blades B (circular motorized or sectors of blades not motorized with shape properly obtained) assembled axially split-leveled and radially split-leveled in a way that the cut of the end trim is done at the same time and immediately after that one roll for each extremity till making the last cut in proximity of the centre of the log, the cutting sequence starts from the extremities of the log and finishes at the centre, start with two cut and simultaneously one for each extremity to finish the cut at the centre of the log, of course, vice versa any cut can starts from the centre of the log and finishes at the extremities of the log. 9) The sequential log saw according to the claims 1 and 2 is characterized that in each type of cutting blades B are always independent one from the other individually assembled on each arm C carrying blades B and have got individually all the mechanical regulation in function of the diameter of the blades and in function of the length of the roll to be cut. 10) The sequential log saw according to claims 1 and 2 is characterized that the circular motorized cutting blades assembled on single arms C can be of different diameter because the arm C carrying single blades B has got all the necessary and independent regulation from the other arms C carrying blades B, that means that the blade B can always be sharpened adjusting the sharpening system which is independent on each arm C, the blade B can be positioned in the right cutting position with the regulation system present on each arm C and independent form the others, what above said is also valid in case that in place of circular motorized blades B are assembled blades sectors properly shaped and not motorized. 11) The sequential log saw according to claims 1 and 2 is characterized that the log cutting in a sequential way 1+1+1+1 etc. is done with the penetration in sequence of each blade, that means that the first blade B makes the cutting at one extremity of the log, the second blade B immediately starts after the end of the first cut done by the first blade, the second cut and so son for the whole number of single cut to be done till the complete cutting, cutting that starts from one extremity to finish to the other extremity of the log, the cutting of the log in a sequential way 1+1+1+1+1 etc.. can even be done starting to cut from the centre and finish at the extremities of the log. 12) The sequential log saw according to claims 1 and 2 is characterized that the log cutting in a sequential way 2+2+2+2 etc. is done with the penetration in sequence of two blades B of extremity (one for each log extremity) when the cut is done it starts immediately after the penetration of the following blades B towards the centre of the log and so on till the complete cutting, cutting that starts from two extremities to finish to the centre of the log, the cutting of the log in a sequential way 2+2+2+2 etc.. can even be done starting to cut from the centre and finish at the extremities of the log. 13) The sequential log saw according to the claims 1 and 2 is characterized with sequential cutting n+n+n etc that are done by simultaneous penetration of n blades B of extremity (n blades B for each log extremity), once the cutting is finished the following n blades B penetration start towards the centre of the log and so on till the end of cutting, cutting that start from the extremity of the log to finish at the centre of the log, the sequential cutting n+n+n+n+n etc... can even start from the centre of the log and finish at the extremity of the log. 14) The sequential log saw according to the claims 1 and 2 is characterized for sequential log cutting having a length changeable from 0 up to 5420mm and more, and in particular that for log having a length of 5420mm the sequential log saw assemble arms carrying blades B on the main body A in the sequence that the first single blade B cut the log in the centre creating logs having a length of 2710mm each, once this cutting is finished the following cut starts with single blades B in sequence and simultaneously cut 4 blades B (one for each extremity of the log cut at 2710mm), the cutting in sequence 4+4 finishes at the centre of each log length 2710mm already previously cut with the first and lonely cut, therefore for each log already cut length 2710mm, we will have in sequence of 2+2 simultaneously cutting. 15) The sequential log saw according to claims 1 and 2 is characterized for the sequential cutting with cutting sequences beginning from the log extremities towards the centre of the log, the sequential cutting can even be done starting from the centre of the log and finish at log extremities, therefore the sequential cutting can starts from whatever point of the log with a quantity of blades that simultaneously cut and that can vary from 1 till n according to needs. 16) The sequential log saw according to claims 1 and 2 is characterized that can even be set the endless configuration of cutting sequence, neither we want to make the sequence cutting of each single blade B nor we want to make the sequence cutting with more blades B that cut simultaneously. |
DESCRIPTION:
a) The invention is about the sequential log saw for roll cutting and in particularly has got the invention the sequential cutting (in several sizes requested from the market) of tissue paper log having different diameters coming out from the rewinder machine and, once they are cut in single rolls of various length and diameter as requested from the market, they are transferred to the packaging line.
b) Log saws for tissue paper are very much used in tissue paper converting field. Nowadays log saws are very limited as production speed; in fact on the same production line it's necessary having more log saws. In addition to that, they have problems in end trims separation of the cut roll, they have problems in cutting the precise wished length of the roll. It's very limited because it works with alternative motions. In addition to that, it produces lot of waste with an end trim length 6/7cm.
With the sequential log saw we can cut from 0 up to 60 and more log per minute (the log is the tissue paper roller wound from the rewinder machine on a cardboard core. The length can vary from at least 1850mm up to 5500mm and more, it depends from the size of the rewinder machine), it doesn't exist alternative and intermittent motions, it's possible to cut roll lengths very precise because the log is still and well positioned during cutting phases, the trim separation is guaranteed 100% because each single roll, included the end trims, are individually held by means of appropriate hands independent one from the other and that release the cut rolls in the appropriate position of the evacuation belt while the end trims will be released in the following intermediate position into the properly collector.
c) The purpose of the invention is to create an automatic machine with a double and more production speed comparing to nowadays log saws, without alternative motions (up and down of the cutting blade in the nowadays) without intermittent motions (progress with log porters during each cutting phase of the nowadays log saws), to have an absolute guarantee into head trim separation of each log from the rest of the cut rolls, to have always the assurance even in production that the cutting length remains always the same we have set. The end trims are minimized of at least 1cm like for the two extremities.
According to the invention all of that can be obtained by assembling cutting blades (that can be circular, with various thickness, motorized, can be even at blade sector with shape with curvature properly studied not motorized) necessary to cut the whole length of the log in sequence (sequential log saw) in the following way:
cutting blades are assembled on properly arms and firmly fixed with guides axially assembled on a central body. They are split-level in axial and radial way one from the other, in a way that when one blade has cut the first head trim it starts the following blade to cut the first roll and so on for the numbers of cut we must done in the log to be cut.
Example: if we position 28 blades at a distance of 100mm one from the other we will obtain two end trims of a minimum thickness of 1 cm each and 27 cutting length 100mm. The total log length will be 2720mm. Of course, if there are two logs in the cutting position we will have 54 cut rolls and four end trims.
The 28 blades positioned on the central body will have finished to cut at the end of one turn of the central body which has got continuous and constant rotary motion. At the end of the turn it starts the following cutting phase with the following log properly positioned in the cutting position. The blades which are positioned at a distance of 100mm will make always the cut of 100mm till we will not electronically switch a new cutting length.
The feeding is composed of a rotary central body on which can be assembled at least 3 or 4 and more stations and for each station at least one, two or more automatic hands raws suitable to lock 1, 2 or more log. In case that the feeding is composed of 4 stations we have that the group makes a quarter turn for each processing phase. Phase one log catching, phase two turning of 1/4 turn it positions the log, strictly kept from the hands, in the cutting position, turning 1/4 more turn the cut rolls are positioned in the evacuation belt situated down. Phase 4 after having positioned the rolls into the evacuator in the intermediate position of the following quarter turn, at about half way of this portion of turn, the hands open which still contain the end trims that will be discharged in the properly container. In this phase we have got the absolute guarantee of the end trims separation of the cut rolls.
The invention will be now described using examples and referring to drawings as follows:
The enclosed Fig.1/1 shows at least one of the possibility of creation of the sequential log saw. In this drawing is represented the feeding group χ with 4 stations at 90° one from the other but can be assembled one feeding group with three stations at 120° one from the other.
The sequential log saw as enclosed Fig.1/1 is composed of two main groups: feeding group χ and cutting group Y.
Feeding group χ is divided in four groups carrying hands D equal and turns each time of a quarter-turn. Each group is composed by two hand rows D. In the enclosed drawing Fig.1/1 there are assembled two hands rows for each group. In the upper part χι hands D put on two rows are open and close immediately after that two logs are arrived. The group makes on rotation of a quarter-turn and positions in the station χ 2 , position in which the total cutting of the log into rolls having length and diameter electronically set has done. The group makes another quarter-turn and hands D are positioned in the lower part χ 3 where they provide to deposit the rolls on the evacuator belt W and to contain the end trims. At the end, the group makes the last quarter-turn and it stops in the position χ 4 with hands D all open. Approximately half way between χ 3 and χ hands (which always keep the end trims) open and let them fall into the properly container E. Of course each quarter-turn is done a total cutting of the two logs held by hands D.
The cutting group Y is composed of a central body A which turns always at the selected speed according to the cutting to be done, with assembled on it all the arms C carrying blades B suitable to make the cutting which will be necessary. In this Fig.1/1 is showed the sequential log saw in one of its various cutting sequences and in particularly is composed of 28 circular blades assembled on 28 arms. On the drawing we can see only 14 blades radially staged because the log sequential cutting is done with two blades which cut simultaneously, so the cutting sequence of 2+2+2, etc.
On the central body A of the group Y, which will be a steel roller or a metallic structure composed of carpentry are obtained many flats as there are arms C carrying blades B necessary to the cutting processing of the log.
Arms carrying blades B are fixed on properly guides at dovetail M in a way that they can be automatically moved in axial sense according to axe Z of the central body A of the group Y. Axial regulation for the automatic determination of the roll cutting length.
Arms length C is variable allowing the automatic regulation H of the various blades B independently one from the other, in the optimal point for cutting.
Automatically shorten they allows to disengage blades B which are not used during some cutting lengths.
On the arms C can be assembled neither traditional motorized circular blades B nor sectors of blades properly shaped and not motorized. The circular blades drive motor is fixed on arms. On the arms C there are assembled two wheels G motorized and automatically adjustable according to the usury of the blade.
The arms C carrying blades can be automatically and axially adjust along the central body in a way to find the right cutting length which is electronically set.
The central body A. turns in continuous, without never stopping, each complete turn makes one complete cutting of two logs. One complete turn of the group Y (cutting group) is a quarter-turn of the group χ (log feeding) in case is divided in four stations. Limiting case in the sequential log saw the arms can be assembled on the central body A on only one line, permitting at motorized blades B or at blades sectors properly shaped and not motorized to cut all the rolls, with the size electronically set, all in the same time.