JP4822896B2 - Composite sheet manufacturing method and apparatus - Google Patents

Description

  The present invention relates to a method and apparatus for manufacturing a composite sheet in which a first sheet is laminated on a second sheet and combined.

  For example, a technique described in Patent Document 1 below is known as a manufacturing technique of a composite sheet in which each leaf sheet is laminated on a belt-like sheet to be combined. In this technique, continuously supplied elastic members are cut to a predetermined length, and the intervals between the cut elastic members are widened and arranged on a belt-like web at predetermined intervals.

JP 2004-329873 A

  By the way, in this technique, sheets can be arranged on the belt-like web at the same intervals, but the adjacent elastic members cannot be arranged so that the intervals are different.

  Therefore, an object of the present invention is to provide a composite sheet manufacturing method and apparatus capable of disposing adjacent first sheets on the second sheet so that the intervals are different.

This invention supplies a 1st sheet | seat between the rotating cutter roll and the anvil roll, cut | disconnects to every leaf, and makes the several sheet of each leaf of the said 1st sheet into a set with the said anvil roll. It is a method for producing a composite sheet that is held at predetermined intervals and arranged on the second sheet, and these sheets are combined.
In the anvil roll, the first interval is set so that the pitch interval between the leaves in one set is different from the pitch interval between adjacent leaves in the one set and the other set. The object is achieved by providing a method for manufacturing a composite sheet in which each leaf of a sheet is arranged on the second sheet.

  Further, the present invention is a composite sheet manufacturing apparatus comprising a cutter roll, an anvil roll, and a sheet supply means for supplying a first sheet between these rolls, wherein the anvil roll includes: A plurality of sheets of the first sheet are rotated while being held at a predetermined interval as a set, and the pitch interval between the leaves in the set is set between the one set and the following other set. The object is achieved by providing an apparatus for manufacturing a composite sheet arranged on the second sheet so as to have a positional relationship different from the pitch interval between adjacent leaves.

  According to the method and apparatus for producing a composite sheet of the present invention, it is possible to suitably produce a composite sheet arranged on the second sheet so that the adjacent first sheets are different in interval.

  Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.

  FIG. 3 schematically shows an embodiment of a composite sheet manufactured by the first embodiment of the composite sheet manufacturing apparatus (hereinafter also simply referred to as a manufacturing apparatus) of the present invention schematically shown in FIG. It is.

  As shown in FIG. 3, the composite sheet 10 is obtained by laminating the short sheets 11 </ b> A, 11 </ b> B,... Of the first sheet 11 on the long second sheet 12. These leaf lengths Li have the same length. The leaves 11A, 11B,... Of the first sheet 11 are joined in pairs with a predetermined interval, and the pitch interval Dii between the leaves 11A, 11A in the set A is one. The position A is different from the pitch interval Dij between the adjacent leaves 11A and 11B of the set A and the other set B that follows. Further, the pitch interval D between each pair is (Dii + Dij), and the pitch interval Dii is less than ½ of the pitch interval D.

  As shown in FIG. 1A, the manufacturing apparatus 1 of the present embodiment includes a cutter roll 2, an anvil roll 3, and a sheet supply unit 4 that supplies a first sheet 11 between the rolls 2 and 3. Coating means 5 for applying an adhesive to the first sheet 11; pressure means 6 for pressing the second sheet 12 and each leaf of the first sheet 11 disposed thereon; and A cutter roll 2, an anvil roll 3, a sheet supply means 4, and a control means (not shown) for controlling the operation of the manufacturing apparatus 1 are provided.

  The cutter roll 2 includes a roll 21 to which two blades 211 and 212 are attached, and a motor (not shown) that drives the roll 21. The blades 211 and 212 are attached so as to cut the first sheet 11 every time the roll 21 makes a half rotation. As shown in FIG. 1B, the roll 21 is set such that the length LR21 between the blades 211 and 212 in the circular trajectory of the blades 211 and 212 is α longer than the interval Dii between the leaves in each set. Has been.

  The anvil roll 3 includes a roll 31 disposed below the cutter roll 2 and a motor (not shown) that drives the roll 31. The roll 31 includes a large number of air passages (not shown) that open at the peripheral surface portion thereof. A suction pump and a compressor (both not shown) are connected to these air passages in a switchable manner. And each leaf of the cut | disconnected 1st sheet | seat 11 is sucked and hold | maintained to the surrounding surface part of the roll 31, and when it rotates to the merge position with the 2nd sheet | seat 12 in that state, the suction from an air passage is released. Air is jetted from the suction path, and each leaf of the first sheet 11 is arranged on the second sheet 12.

  In the manufacturing apparatus 1 of the present embodiment, the rolls 31 of the anvil roll 3 are rotated at a constant speed V31, as shown in FIG. As a set, and the pitch interval Dii between the leaves 11A in the set is the pitch between the adjacent leaves 11A and 11B between the set A and the other set B that follows. It is provided so as to be arranged on the second sheet 12 so as to have a different positional relationship from the interval Dij.

  The sheet supply means 4 includes a conveyor 41, a pair of rolls 42 and 43 that drive the conveyor 41, and a drive motor (not shown) that drives the rolls 42 and 43.

  The adhesive application device 5 is selected according to the adhesive to be used, the form of application of the adhesive, and the like. As the coating apparatus 5, for example, a known coating apparatus such as a nozzle discharge type or a die coater type conventionally used for joining sheets is adopted.

  The pressurizing means 6 includes a press roll 61 disposed below the anvil roll 3 and a motor (not shown) that drives the press roll 61. The press roll of the pressurizing means may have a structure that can be heated.

  The control means includes a control controller having a CPU, a storage device, an input device, an output device, and the like, and holds a sequence program for operating the manufacturing apparatus 1 in the storage device. And based on this program, the operation | movement of the manufacturing apparatus 1 is controlled as follows in a steady state.

  In the steady state, the manufacturing apparatus 1 of the present embodiment is set so that the roll 31 of the anvil roll 3 and the conveyor 41 of the supply apparatus 4 operate at a speed as shown in FIG. That is, the anvil roll 3 is provided such that the roll 31 rotates at a constant peripheral speed V31 during the cutting of each pair of two sheets (period: 0 to T (D)). The conveyor 41 is set to supply the first sheet 11 at a supply speed V11 that is lower than the peripheral speed V31 of the roll 31, but the blades 211 and 212 of the roll 21 are set to the first sheet 11. While cutting every leaf in each group (T (CP1) to T (CP2): cutting the first leaf of each group in the roll 31 at the cut point CP1 of the roll 31 and then cutting the last leaf The first sheet 11 is set to be supplied at a constant speed except that the supply speed V11 is once accelerated to V11max and then decelerated (until cutting at point CP2). V11max is set according to the length Li of each leaf and the pitch interval Dii between each leaf in each group.

  On the other hand, as described above, the roll 21 is set such that the length LR21 between the blades 211 and 212 in the circular trajectory of the blades 211 and 212 is longer than the interval Dii between the leaves in each set. (See FIG. 1 (b)). As shown in FIG. 2B, the blades 211 and 212 of these rolls 21 are cut between all the leaves in each set of the first sheet 11 (T (CP1) to T (CP2)). Depending on the length of each leaf, it is once accelerated to V21max, which is faster than the circumferential speed V31 of the roll 31, and then decelerated to the circumferential speed V31, and before the first leaf of the next set is cut. It is set so that it is decelerated to V21 min, which is lower than the peripheral speed V31 of the roll 31, and then re-accelerated to the peripheral speed V31. V21max and V21min are set according to the length LR21 between the blades 211 and 212 of the cutter roll 21 and the pitch interval Dii between the leaves in each set.

  In the manufacturing apparatus 1 of the present embodiment, the adhesive application device 5 applies the adhesive to the surface of the first sheet 11 supplied between the rolls 21 and 31 in synchronization with the conveyor drive roll 43. Is set to

  In the manufacturing apparatus 1 of the present embodiment, the press roll 61 is provided so as to rotate in synchronization with the roll 31 of the anvil roll 3.

  Next, 1st Embodiment of the manufacturing method of the composite sheet of this invention is described based on the manufacturing method of the composite sheet which uses the manufacturing apparatus 1. FIG.

  First, the manufacturing apparatus 1 is started and the cutter roll 2, the anvil roll 3, the conveyor 41, and the press roll 6 are rotated in a steady state as described above.

  Then, the first sheet 11 before cutting is supplied between the roll 21 and the roll 31 by the conveyor 41. The first sheet 11 is coated with an adhesive by the coating device 5 before being supplied between the roll 21 and the roll 31. As described above, in the present embodiment, as shown in FIG. 2A, the roll 31 of the anvil roll 3 is rotated at a constant peripheral speed V31. The first sheet 11 is supplied between the roll 21 and the roll 31 at a supply speed slower than the peripheral speed V31 of the anvil roll 3, and all the leaves in each set are cut (T (CP1) to T ( CP2)) is supplied at a constant speed except that the supply speed is once accelerated to V11max (<V31) and then decelerated. On the other hand, as shown in FIG. 2B, the roll 21 is cut while the blades 211 and 212 cut all the leaves of the first sheet 11 in each set (T (CP1) to T ( In CP2)), the speed is once accelerated to V21max that is faster than the peripheral speed V31 of the roll 31 according to the length of each leaf, and then decelerated to the peripheral speed V31. And after decelerating so that it may become V21min until the first leaf of the next set is cut | disconnected, it accelerates to this peripheral speed V31. In this way, the cutter roll 2, the anvil roll 3 and the conveyor 41 cooperate, so that the pitch interval Dii between the leaves 11A in one set A is adjacent to one set A and the other set B that follows. The first sheet 11 supplied between the rolls 21 and 31 is sequentially cut into leaves so that the positional relationship is different from the pitch interval Dij between the leaves 11A and 11B.

  Each leaf of the first sheet 11 cut in this way is an anvil roll so that the pitch interval Dii and the pitch interval Dij between adjacent leaves between each set are in a positional relationship as a set of two sheets as they are. 3 is sucked and held on the peripheral surface portion of the roll 31 and is transferred to the joining position on the second sheet 12. Then, the suction holding is released, and each leaf of the first sheet 11 arranged on the second sheet 12 is sandwiched between the roll 31 and the press roll 61, and these sheets are bonded via an adhesive. Joined and compounded. As a result, as shown in FIG. 3, the pitch interval Dii between the leaves 11A in one set A is equal to the pitch interval between the adjacent leaves 11A and 11B between one set A and the other set B that follows. A continuous body of composite sheets in which each leaf of the first sheet 11 is bonded onto the second sheet 12 so as to have a different positional relationship from Dij is manufactured.

  As the first sheet 11 and the second sheet 12, a sheet is appropriately selected according to the application of the composite sheet to be manufactured. When the present invention is applied to the manufacture of a composite sheet for absorbent articles, the first sheet is a disposal tape, a mechanical fastener, an elastic sheet, a nonwoven fabric, a film, and the second sheet is a nonwoven fabric, a film, An elastic body or a composite sheet of an elastic body and a nonwoven fabric or a film can be selected. And the composite sheet for outer-layer panels for desired absorbent articles can be continuously manufactured suitably by cut | disconnecting in the external shape as shown by the dashed-dotted line of FIG.

  As described above, according to the manufacturing apparatus 1 of the present embodiment and the manufacturing method of the composite sheet 10 using the same, the second sheet 12 has a different pitch interval between adjacent leaves of the first sheet 11. The composite sheet laminated | stacked on it can be manufactured suitably.

  Next, 2nd-4th embodiment of the manufacturing apparatus (henceforth only a manufacturing apparatus) of the composite sheet of this invention is described.

  As shown in FIG. 4, the manufacturing apparatus of the second embodiment is set such that the arrangement of the blades 212 of the cutter roll 21 is different from that of the manufacturing apparatus of the first embodiment, and the blades 211 and 212 of the cutter roll 21. Is configured in the same manner as the manufacturing apparatus of the first embodiment, except that is attached to the axis target position and is provided to rotate at the same speed as the peripheral speed of the anvil roll. In the manufacturing apparatus of the second embodiment, the shorter distance between the blades 211 and 212 in the length of the orbit of the blades 211 and 212 is the pitch interval Dii () between the leaves in one set of the first sheet. 3), and the longer distance between the blades 211 and 212 in the length of the orbit of the blades 211 and 212 is such that each leaf 11A adjacent to one set A and the other set B following it, The pitch interval Dij between 11B is set. In the manufacturing apparatus of the second embodiment configured as described above, the first embodiment except that the rotation speed of the cutter roll 21 is constantly rotated at the same speed as the circumferential speed of the anvil roll in the manufacturing apparatus of the first embodiment. In the same manner as in the first embodiment, the first sheet is sequentially cut into each leaf, and is sucked and held by the anvil roll and arranged on the second sheet, as shown in FIG. The composite sheet laminated | stacked on the 2nd sheet | seat so that the pitch space | interval of every leaf adjacent to the 1st sheet | seat differs can be manufactured suitably.

  The manufacturing apparatus of 3rd and 4th embodiment is the manufacturing apparatus 1 of 1st Embodiment, and the manufacturing method of a sheet | seat using the same except the operation | movement of the anvil roll 3 in the manufacturing apparatus 1 of the said 1st Embodiment differing. A composite sheet is produced in the same manner as described above.

  In the manufacturing apparatuses of the third and fourth embodiments, the anvil roll is provided so as to be able to accelerate and decelerate the rotation speed, and at least during the cutting of all the leaves of one set and the one set of the cut The anvil roll rotates at a constant speed while all the leaves are arranged on the second sheet, and after the last leaf of the set is cut, the last leaf is placed on the second sheet. The peripheral speed of the anvil roll in the first section before placing on the second section and before cutting the first leaf of the next set after placing the last sheet on the second sheet Is accelerated and decelerated between the first section and the second section to change the speed, and the supply means supplies the first sheet at the same speed as the peripheral speed of the anvil roll, and the cutter roll Rotate at a constant speed or at the same speed as the anvil roll. It is provided.

  In the manufacturing apparatus according to the third embodiment, as shown in FIG. 5A, at least during the cutting of each pair of sheets of the first sheet 11 (T (CP1) to T (CP2): Between the preceding cut point CP1 on the roll 31 and the subsequent cut point CP2), and during the placement of all the cut leaves of each pair on the second sheet 12 (T (TR1) to T (TR2)), the roll 31 of the anvil roll 3 rotates at a constant peripheral speed V31. Then, the anvil roll 3 has the first section before the last leaf is placed on the second sheet 12 after cutting the last leaf of the set and the last leaf as the second. The circumferential speed V31 of the roll 31 is reversely shifted between the first section and the second section in the second section before cutting the first leaf of the next set after being arranged on the sheet 12. That is, in the first section, the peripheral speed of the roll 31 is once accelerated to V31max and then decelerated to the peripheral speed V31, and after the second section and a set of leaves are arranged on the second sheet 12 (the preceding first (After arranging each set of leaves of one sheet at T (TR1) and T (TR2)) Before cutting the next set of leaves, the peripheral speed of the roll 31 is once decelerated to V31min and then to V31 It is provided to be accelerated. In this case, V31max and V31min are set according to the case where the pitch interval D becomes shorter than the pitch interval D of each set at the constant anvil roll speed.

  As shown in FIG. 5B, the manufacturing apparatus of the third embodiment can be applied when the pitch interval D of each set is shortened by β as compared with the composite sheet of the first embodiment.

  In the manufacturing apparatus according to the fourth embodiment, as shown in FIG. 6A, at least during the cutting of each pair of sheets of the first sheet 11 (that is, the preceding cut point CP1 in the roll 31). To the subsequent cut point CP2), and the roll 31 of the anvil roll 3 rotates at a constant peripheral speed V31 while the cut leaves are placed on the second sheet 12. To do. Then, after cutting the last leaf of the set and before placing the last leaf on the second sheet 12, the circumferential speed of the roll 31 is once reduced to V31min and then the circumferential speed. After accelerating to V31 and arranging each set of leaves on the second sheet 12, the arrangement of each set of leaves of the preceding first sheet is performed at T (TR1) and T (TR2), respectively. After the cutting of each leaf of the next set, the peripheral speed of the roll 31 is once accelerated to V31max and then decelerated to V31. In this case, V31max and V31min are set according to the case where the pitch interval D becomes longer than the pitch interval D of each set at the constant anvil roll speed.

  As shown in FIG. 6B, the manufacturing apparatus of the fourth embodiment can be applied to a case where the pitch interval D of each set is increased by β as compared with the composite sheet of the first embodiment.

  In the manufacturing apparatus of the third and fourth embodiments and the manufacturing method of the composite sheet using the same, the first sheet 11 is adjacent to the manufacturing apparatus 1 of the first embodiment and the manufacturing method using the same. The composite sheet laminated | stacked on the 2nd sheet | seat 12 so that the pitch space | interval of every leaf may differ can be manufactured suitably.

The present invention is not limited to the embodiment.
In each of the embodiments described above, the pressurizing unit includes a press roll that presses the laminated sheets together with the anvil roll. However, the pressurizing unit includes an anvil roll including a pressurizing mechanism such as a pair of rolls, and the like. Can be configured to be independent, and can be configured to press the stacked sheets by these pressure mechanisms.

  In the above-described embodiment, the adhesive is applied to the first sheet by the adhesive application means. However, when the adhesive is not necessary, for example, when the sheets are joined by welding or ultrasonic bonding, the adhesive is applied. The construction apparatus can be omitted, and in that case, a heating unit or an ultrasonic bonding unit can be employed instead of or in combination with the pressurizing unit 6.

  In the above-described embodiment, one set of leaves is two, but it can be three or more. Further, although the second sheet is a long sheet, it may be a sheet of every leaf that is cut into a predetermined length in advance and supplied at predetermined intervals.

  INDUSTRIAL APPLICABILITY The sheet processing apparatus and sheet manufacturing method of the present invention can be used in various industries, and manufacture various items such as absorbent articles such as disposable diapers and sanitary napkins, clothing items, and the like. Can be used.

It is a figure which shows typically 1st Embodiment of the manufacturing apparatus of the composite sheet of this invention, (a) is a figure which shows the whole apparatus, (b) is a figure which shows a cutter roll. (A) is a graph of the supply speed of the 1st sheet | seat by the conveyor in the manufacturing apparatus of 1st Embodiment, (b) is a graph of the rotational speed of the cutter roll in the manufacturing apparatus of the same embodiment. It is a top view which shows typically one form of the composite sheet manufactured with the manufacturing apparatus of 1st, 2nd embodiment. It is a figure (Drawing 1 (b) equivalent figure) showing typically a cutter roll in a manufacturing device of a 2nd embodiment. (A) is a graph of the rotational speed of the anvil roll in the manufacturing apparatus of the 3rd Embodiment of this invention, (b) is typically one form of the composite sheet manufactured with the manufacturing apparatus of 3rd Embodiment. FIG. (A) is a graph of the rotational speed of the anvil roll in the manufacturing apparatus of the 4th Embodiment of this invention, (b) is typically one form of the composite sheet manufactured with the manufacturing apparatus of 4th Embodiment. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite sheet manufacturing apparatus 2 Cutter roll 3 Anvil roll 4 Sheet supply means 5 Coating means 6 Pressurizing means 10, 10 'Composite sheet 11 First sheet 11A to 11C Each leaf of first sheet 12 Second Sheet

Claims (8)

A first sheet is supplied between the rotating cutter roll and the anvil roll and cut into each leaf, and a plurality of each leaf of the first sheet is set as a set with the anvil roll at predetermined intervals. A method for producing a composite sheet that is held and placed on a second sheet, and the sheets are combined,
In the anvil roll, the first interval is set so that the pitch interval between the leaves in one set is different from the pitch interval between adjacent leaves in the one set and the other set. A method for manufacturing a composite sheet, wherein each leaf of a sheet is arranged on the second sheet. Rotating the anvil roll at a constant speed,
The feed rate of the first sheet is accelerated once according to the length of each leaf and then decelerated after cutting each leaf in each set at a constant speed lower than the peripheral speed. Supplying the first sheet;
And when the circumferential length of the blade of the cutter roll is the same as the pitch interval between the leaves in each set, the cutter roll is rotated at the same speed as the circumferential speed of the anvil roll,
When the circumferential length of the blades of the cutter roll is longer than the pitch interval between the leaves in each set, the speed of the cutter roll is set to the length of each leaf while cutting the leaves in each set. Accordingly, the speed is once accelerated so as to be faster than the peripheral speed of the anvil roll, and then decelerated to the peripheral speed. The method for producing a composite sheet according to claim 1, wherein the composite sheet is decelerated so as to be lower than the speed and then accelerated to the peripheral speed. Rotating the anvil roll at a constant speed while cutting at least one set of all the leaves and arranging the cut all the leaves of the set on the second sheet, and After cutting the last leaf of a set, the first section before placing the last leaf on the second sheet, and the next after placing the last leaf on the second sheet In the second section before cutting the first leaf of the set, the peripheral speed of the anvil roll is reversely accelerated and decelerated between the first section and the second section.
Supplying the first sheet at the same speed as the peripheral speed of the anvil roll;
And the manufacturing method of the composite sheet of Claim 1 which rotates the said cutter roll at a constant speed or rotates at the same speed as the said anvil roll.   The manufacturing method of the composite sheet in any one of Claims 1-3 which presses every leaf of the said 2nd sheet | seat and the said 1st sheet | seat distribute | arranged on it.   The manufacturing method of the composite sheet in any one of Claims 1-4 which apply | coated the adhesive agent or the adhesive previously to the joint surface with the said 2nd sheet | seat of a said 1st sheet | seat.   A composite sheet manufacturing apparatus comprising a cutter roll, an anvil roll, and a sheet supply means for supplying a first sheet between the rolls, wherein the anvil roll is provided for each of the first sheets. A plurality of leaves are rotated as a set while being held at a predetermined interval, and the pitch interval between the leaves in the set is set so that each set of adjacent leaves between the set and the other set. An apparatus for manufacturing a composite sheet arranged on the second sheet so as to have a positional relationship different from the pitch interval. The anvil roll rotates at a constant speed, and the supply means and the cutter roll are provided so as to be able to accelerate and decelerate the sheet supply speed and the cutter roll rotation speed, respectively.
The supply means is faster than the peripheral speed except that the supply speed of the first sheet is once accelerated according to the length of each leaf and then decelerated after cutting the leaves in each set. Supplying the first sheet at a constant low speed;
And when the circumferential length of the blade is the same as the pitch interval between the leaves in each set, the cutter roll rotates the cutter roll at the same speed as the circumferential speed of the anvil roll,
When the circumferential length of the blade is longer than the pitch interval between the leaves in each set, the peripheral speed of the anvil roll is cut according to the length of each leaf while cutting the leaves in each set. After accelerating so as to be faster, the speed is decelerated to the peripheral speed, and after the first pair of leaves of the next set is cut, the speed is once decelerated so as to be lower than the peripheral speed of the anvil roll. The composite sheet manufacturing apparatus according to claim 6, which is provided so as to accelerate to a speed. The anvil roll is provided so that its rotational speed can be accelerated and decelerated,
The anvil roll rotates at a constant speed while cutting at least one whole set of leaves and arranging the cut all sets of leaves on the second sheet, and After cutting the last leaf of the set, the first section before placing the last leaf on the second sheet and the next after placing the last sheet on the second sheet In the second section before cutting the first leaf of the set, the peripheral speed of the anvil roll is reversely accelerated and shifted between the first section and the second section,
The supply means supplies the first sheet at the same speed as the peripheral speed of the anvil roll;
And the manufacturing apparatus of the composite sheet of Claim 6 provided so that the said cutter roll may rotate at a fixed speed or the same speed as the said anvil roll.

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