CN104520219B - The manufacture method of coiling body and coiling body manufacture device - Google Patents

Abstract

The present invention provides the manufacture method of a kind of uneven coiling body that can suppress width when the state rolled up with blank is placed and coiling body to manufacture device.Coiling body manufacture device (1) possess stretching device (30) that the elongate thin film to viscoelastic body (Rp) stretches, by thin film (Fp) severing severing component (55) by the width of regulation of stretching, the idler roller (52) of the tension force of the applying length direction of the thin film (Fp) to severing component (55) wanted severing, batch by the devices for taking-up (60) of the thin film (Fb) of severing, control device (90).When severing thin film (Fp), change the tension force of the length direction acting on thin film (Fp), severing thin film (Fp) on one side.And, the width of the thin film (Fb) after severing can be correspondingly changed with tension force, when to have batched the time that be have passed through regulation by the state of the thin film (Fb) of severing, the width of thin film (Fb) that can suppress to produce because winding position is different uneven.

Description

The manufacture method of coiling body and coiling body manufacture device

Technical field

The manufacture method and the coiling body that the present invention relates to coiling body manufacture device, particularly relate to put with the state of blank volume Manufacture method and the coiling body that can suppress the uneven coiling body of width when putting manufacture device.

Background technology

By food materials, vegetable or the food packing film that the tablewares such as plate are wrapped together with vegetable is extensively made With.Food packing film such as manufactures as following.By the synthetic resin melting sources of viscoelastic body, it is extruded into cylinder Shape.Air it is blown in the synthetic resin being extruded into cylindrical shape, the cylindric synthetic resin of stretching, make the thin film of cylindrical shape. Cut off to do by cylindric thin film and become band, batch it and make blank volume.From blank volume pull-out thin film, again roll up with the amount of retail Around, encapsulate and dispatch from the factory.In the manufacture process of thin film, when batching band-like film and making blank volume, with identical tension force volume In the case of around, gauffer occur because of internal tightness, in order to avoid this situation, be provided with Coiling Tension Control device, it sets Tension force, makes at the initial stage of batching, and batches (for example, with reference to patent documentation 1) securely with higher tension force.

Prior art literature

Patent documentation

[patent documentation 1] Japanese Unexamined Patent Publication 6-48654 publication (0017 paragraph)

Brief summary of the invention

The problem that invention intends to solve

But, even if not produce tension winding as gauffer, if before segmentation with blank volume state place, then because of Columned blank volume the vicinity of difference such as wireline reel of position of radial direction, the vicinity of periphery and they between, The width of the thin film of banding changes.If the width of the thin film of banding occurs uneven when blank is rolled up, then exist The wide thin film of width and the thin film of narrow width is produced between the thin film of segmentation.

The present invention does in view of the above problems, its object is to provide a kind of and can suppress when the state rolled up with blank is placed The manufacture method of the uneven coiling body of width and coiling body manufacture device.

Summary of the invention

To achieve these goals, the manufacture method of the coiling body of the 1st mode for the present invention the most such as see Fig. 1 with And shown in Fig. 4, including: the stretching process (St3) that elongate thin film Rp formed by viscoelastic body is stretched；At stretching process (St3), after, the tension force of the length direction acting on film F p is changed, while film F p is cut into the width of regulation Severing operation (St5)；Batch in severing operation (St5) by the coiling process (St6) of film F b of severing.

Use described composition, it is possible to change the tension force of the length direction acting on thin film, while being cut into by thin film The width of regulation, thus it is possible to correspondingly change the width of the thin film after severing with the tension force of the length direction acting on thin film, When to have batched the time that be have passed through regulation by the state of the thin film of severing, that can suppress to produce because winding position is different is thin The width of film uneven.

It addition, the manufacture method of the coiling body of the 2nd mode for the present invention the most such as sees Fig. 1, Fig. 4 and Fig. 7 (A) Shown in, in the manufacture method of the coiling body of the 1st mode about the invention described above, severing operation (St5) is by the following manner structure Become, make to act on the tension force of the length direction of film F p, from will with coiling process (St6) winding start position corresponding During the severing of film F p, to during film F p severing corresponding to position that will terminate with the winding in coiling process (St6), Temporarily diminish continuously and/or periodically, hereafter, become continuously and/or periodically and (see in Fig. 7 (A) greatly Solid line T).Typically, it is made up of in the following manner, if assuming to make to act on the length of film F p in severing operation (St5) The tension force in direction is constant to carry out severing, then batch by the thin film of severing and have passed through regulation time time, taken Thin film width on produce in the situation (for example, see Fig. 5) of the position narrower than reference value and the position wider than reference value, arrive By the width of thin film that taken with in the case of assuming for the widest position (such as, the position Lc of the width Wc in Fig. 5) Till during corresponding thin film severing, make the tension force acting on the length direction of thin film diminish, hereafter, make to act on the length of thin film The tension force in direction becomes big.

Use described composition, it is possible to when making the tension force acting on the length direction of thin film become big and to carry out severing, cut out Having no progeny, recovery when tension force releases is big, becomes the thin film that width is relatively wide, becomes making the tension force acting on the length direction of thin film Little and when having carried out severing, after severing, recovery when tension force releases is little, becomes the thin film that width is narrow, therefore, to batch During time of being have passed through regulation by the state of the thin film of severing, it is possible to suppress the width of the thin film produced because winding position is different That spends is uneven.

It addition, the manufacture method of the coiling body of the 3rd mode for the present invention is such as seen shown in Fig. 1 and Fig. 4, In manufacture method about the 1st mode of the invention described above or the coiling body of the 2nd mode, also include segmenting operation (St7), After the time completing coiling process (St6) and having begun to pass through regulation, film F b that is taken up of pull-out, with ratio at coiling process (St6) the short length of length of batching in rewinds.

Use described composition, it is possible to the width between each thin film of being subdivided of suppression uneven.

It addition, the manufacture method of the coiling body of the 4th mode for the present invention is such as seen shown in Fig. 1 and Fig. 4, In manufacture method about the coiling body of any one mode in the 1st mode to the 3rd mode of the invention described above, severing operation (St5) constituted in the way of film F p is cut into multiple row.

Use described composition, by increasing capacitance it is possible to increase the generation amount of the thin film after severing, it is possible to increase generation efficiency.It addition, make In severing operation, in the case of the width of regulation during severing becomes the width corresponding with the width of final products, it is not necessary to Being cut into the width of final products in segmentation operation afterwards, the re-winding of thin film becomes easy.

To achieve these goals, the coiling body of the 5th mode for the present invention manufactures device such as such as Fig. 1 and Fig. 5 Shown in, possess: stretching device 30, viscoelastic body elongate thin film Rp formed is stretched；Severing component 55, by stretching Film F p is cut into the width (for example, with reference to Fig. 3) of regulation；Idler roller 52, film F p of severing wanted to severing component 55 is executed Add the tension force of length direction；Devices for taking-up 60, its film F b batched by severing；Controlling device 90, it controls idler roller 52, Position to make to act on the tension force of the length direction of film F p, from severing with the winding carried out by devices for taking-up 60 During corresponding film F p, during to film F p that severing is corresponding with the position of the end of the winding carried out by devices for taking-up 60 it is Only, diminish the most continuously and/or periodically, hereafter, become big continuously and/or periodically.

Use described composition, when making the tension force acting on the length direction of thin film become big and to carry out severing, after severing, Recovery when tension force releases is big, becomes the thin film that width is relatively wide, making the tension force acting on the length direction of thin film diminish When having carried out severing, after severing, recovery when tension force releases is little, becomes the thin film that width is narrow, therefore, to have batched quilt When the state of the thin film of severing have passed through the time of regulation, it is possible to the width of the thin film produced because winding position is different irregular Uneven.

Invention effect

In accordance with the invention it is possible to correspondingly change the width of the thin film after severing with the tension force of the length direction acting on thin film Degree, when to have batched the time that be have passed through regulation by the state of the thin film of severing, can suppress to produce because winding position is different Width uneven of thin film.

The application is by October 23rd, 2012 based on the Patent 2012-233892 that Japan applies for, its content is made For present context, form one part.

It addition, the present invention can be more fully understood by following detailed description.The present invention's further should Can be made apparent from by following detailed description by scope.But, detailed description and specific example are the present invention Better embodiment, be only for the content recorded for the purpose of description.Within the spirit and scope of the present invention, detailed from this Explanation carry out various changes, change, apparent to those skilled in the art.

Applicant is not intended to described embodiment is all presented to the public, in disclosed change, replacement case There may exist and be not included in the situation in the range of claims by character property, but also become under the doctrine of equivalents A part for invention.

Accompanying drawing explanation

[Fig. 1] is the summary construction diagram that the blank of embodiment for the present invention rolls manufacturing apparatus.

[Fig. 2] is the partial structurtes constituting the chiller that the blank of embodiment for the present invention rolls manufacturing apparatus Figure.

[Fig. 3] is to represent that the blank constituting embodiment for the present invention rolls the cutting device of manufacturing apparatus and batches The figure of the schematic configuration of device.(A) being top view, (B) is side view.

[Fig. 4] is the flow chart of the blank volume manufacture process representing embodiment for the present invention.

[Fig. 5] be the band-like film from the hypothesis having batched constant width begun to pass through regulation time time blank volume Sectional view.

[Fig. 6] is the base having batched and having been rolled the band-like film that manufacturing apparatus is formed by the blank of embodiment for the present invention The sectional view of material volume.(A) be after just batching blank volume sectional view, (B) be from batch begun to pass through regulation time Time blank volume sectional view.

[Fig. 7] (A) is the song of an example of the relation of the tension force of length direction during position and the severing representing band-like film Line chart, (B) is to represent after the time that the state rolled up with blank have passed through regulation, evens up band-like film, measures the result of width Curve chart.

Detailed description of the invention

Below, see accompanying drawing, embodiments of the present invention are illustrated.It addition, to the most identical or Suitable parts mark same or similar symbol, and the repetitive description thereof will be omitted.

First, seeing Fig. 1, the blank that the coiling body as embodiment for the present invention manufactures device rolls and makes dress Put 1 to illustrate.Fig. 1 is the summary construction diagram that blank rolls manufacturing apparatus 1.Blank rolls manufacturing apparatus 1 and possesses what extrusion had melted The extruder 10 of synthetic resin raw material；Cool down the chiller 20 of parison (tubular resin) Rp extruded from extruder 10；To quilt The parison Rp of cooling stretches, and makes the stretching device 30 of tubular film Fp；Alleviation is applied to the tubular film Fp's of stretching The reliever 40 of stress；By tubular film Fp severing, make the cutting device 50 of band-like film Fb；Batch by the banding of severing Film F b, makes the devices for taking-up 60 of blank volume Fr；Control the control device 90 that blank rolls the action of manufacturing apparatus 1.Blank is rolled up Manufacture device 1, its extruder 10, chiller 20, stretching device 30, reliever 40, cutting device 50 and devices for taking-up 60 arrange according to this order, and the parison Rp, tubular film Fp, the band-like film Fb etc. that are suitably changed in the most square state generate Thing moves in the order.In the following description, the direction moved by product is referred to as " length direction ", will be with length side It is referred to as " width " to orthogonal direction.In the present embodiment, width is horizontally extending.

The synthetic resin raw material putting into extruder 10 is to have the viscosity in polymer substances such as combining thermoplastic resin And elastic both the object (viscoelastic body) of character, in the present embodiment, use polyvinylidene chloride analog copolymer. Vinylidene chloride analog copolymer can use reduced viscosity for more than 0.035～0.075, preferably 0.038～0.070, more excellent Elect the known vinylidene chloride copolymer of the scope of 0.040～0.065 as.As such vinylidene chloride analog copolymer, The material that by suspension polymerisation obtained is preferably used, for example, it is preferable to vinylidene chloride 60～98 weight % and about 40～about 2 weights Amount %'s can be with the copolymer of at least one vinyl unsaturated monomer of vinylidene chloride copolymerization.As such alkenes insatiable hunger And monomer, it is possible to exemplify vinyl chloride, vinyl acetate, propionate, alkyl acrylate, alkyl methacrylate, The Arrcostab of acrylic acid, methacrylic acid, itaconic acid and these acid, acrylonitrile, methacrylonitrile, acrylamide, vinyl Single vinyl unsaturated monomer such as alkyl ether, vinyl alkyl ketone, acrylic aldehyde, allyl ester, allyl ether, styrene；Butadiene, chlorine Dienes unsaturated monomers such as butadiene and make copolymer obtained by these vinyl unsaturated monomer copolymerization more than two kinds.

Extruder 10 has hopper 11, screw rod 13 and the shape of the mouth as one speaks 15.Hopper 11 is to supply synthetic resin to one end of screw rod 13 The parts of raw material.The hopper 11 being arranged in extruder 10 in lower section compared with top the face shaping of the inverted cone-shaped of constriction, To collect the synthetic resin raw material being directed to top while being allowed to fall, the mode structure derived to one end of screw rod 13 Become.Screw rod 13 in the present embodiment, is made up of in the following manner, and axis horizontal ground is arranged, by rotating about the axis, and will be from hopper 11 are supplied to the synthetic resin raw material of one end towards the other end flatly force feed.Synthetic resin raw material is quilt when by screw rod 13 force feed Fusing, arrives the other end with the state of fusing.The shape of the mouth as one speaks 15 is disposed in the other end of screw rod 13.The shape of the mouth as one speaks 15 in the present embodiment, Front end geometry is processed, in order to extrude melting of synthetic resin raw material with drum.Cylindric synthesis from the shape of the mouth as one speaks 15 extrusion Resin is parison Rp.

Chiller 20 has cooling bath the 21, the 1st pinch roll the 23 and the 2nd pinch roll 25.Cooling bath 21 is in order to receive The parison Rp extruded from the shape of the mouth as one speaks 15, and it is adapted to the region of the vertically lower section comprising the shape of the mouth as one speaks 15.By in the following manner structure Become, cooling bath 21 contains cooling water C, it is possible to impregnate and cool down the parison Rp extruded from the shape of the mouth as one speaks 15.1st pinch roll 23 Become a pair flat cylindrical roller by the parison Rp making cylindrical shape to constitute.1st pinch roll 23 extends at width, floods also It is disposed in the cooling bath 21 of vertically lower section of the shape of the mouth as one speaks 15.2nd pinch roll 25 is disposed at width and pinches from the 1st with extending Roller 23 away from the outside of cooling bath 21.Parison Rp, for before parison Rp is transported to stretching device 30, is tieed up by the 2nd pinch roll 25 Hold as flat, and be made up of a pair cylindrical roller.

Here, see Fig. 2 in the lump, remaining structure of chiller 20 is described.Chiller 20 also have relative to from The inside of the cylindric parison Rp of the shape of the mouth as one speaks 15 extrusion, makes the circulation pipe 27 that filler P comes in and goes out.Filler P is anti liquid Shape thing, be in order to make after become flat parison Rp the inner face of contact be easily peeled off each other and in parison Rp the thing of supply Matter.The circulation pipe 27 through shape of the mouth as one speaks 15 ground arranges.Connect at circulation pipe 27 and inject the ascending pipe 28 of filler P and by filling of circulating Fill out the discharge pipe 29 that agent P discharges.The injection valve 28v of opening and closing runner is arranged at ascending pipe 28.Opening and closing runner is arranged at discharge pipe 29 Dump valve 29v.Injection valve 28v and dump valve 29v is respectively by signal cable and the filler control constituting control device 90 Portion 91 (seeing Fig. 1) processed connects.Filler control portion 91 is made up of in the following manner, by respectively to injection valve 28v and discharge Valve 29v transmits opening and closing signal, it is possible to makes valve open or closes, or the aperture of control valve.Filler control portion 91 is by with lower section Formula is constituted, by making injection valve 28v for opening, it is possible to injects filler P to circulation pipe 27 (circulatory flow of filler P), passes through Make dump valve 29v for opening, it is possible to discharge filler P from circulation pipe 27 (circulatory flow of filler P).

Filler P in parison Rp clamps flat parison Rp due to a pair the 1st pinch rolls 23, without to the 1st The downstream that pinch roll 23 is compared exceedingly is flowed out.Filler P in parison Rp separates with the cooling water C in the outside of parison Rp, Liquid level can be changed independently with the water surface of cooling water C.Therefore, by opening and closing injection valve 28v and dump valve 29v, relative to The circulatory flow (circulation pipe 27) of filler P, by making filler P come in and go out, can change the liquid level of filler P in parison Rp.Fill Fill out agent control portion 91 and regulate the flow of the filler P come in and gone out in parison Rp, in order to make the liquid level of the filler P in parison Rp exist More than the water surface of the cooling water C in the outside of parison Rp.The part more than the water surface of cooling water C of the filler P in parison Rp Gravity (pressure produced by its gravity) be applied to cool down water C the water surface and the liquid level of filler P between parison Rp, make For the direction that the diameter of parison Rp is expanded.The distance of the water surface of cooling water C and the liquid level of filler P is the biggest, is applied to cold But the gravity of the filler P of the parison Rp between the water surface and the liquid level of filler P of water C is the biggest.Therefore, the water of water C is cooled down The distance of the liquid level of face and filler P is the biggest, and the parison Rp diameter in cooling water C that submerges is the biggest.So, by changing parison The liquid level of the filler P in Rp, it is possible to change the parison Rp diameter submerged in cooling water C.

Then, referring primarily to Fig. 1, the explanation that blank rolls the structure of manufacturing apparatus 1 is proceeded.Stretching device 30 is at quilt The interior pressure of air enclosed, stretches from chiller 20 parison Rp out, makes the tubular thinner than parison Rp thin The device of film Fp.Tubular film Fp in the present embodiment, be parison Rp by biaxial tension, and the product of plastic deformation.Stretching Device 30 has the 3rd pinch roll 35.3rd pinch roll 35 is disposed in the downstream-side end of stretching device 30.3rd pinch roll 35 is by pressing from both sides The tubular film Fp that pressure is cylindric, and made a pair flat cylindrical roller composition.

Reliever 40 is the device alleviating the stress being applied to tubular film Fp by stretching device 30.Reliever 40 by In the following manner is constituted, tension force minimum needed for transporting flat tubular film Fp between stretching device 30 and cutting device 50 It is applied to flat tubular film Fp.Reliever 40 has the guide roller group 41 of the flat tubular film Fp of supporting.Relax dress Putting 40 to be made up of in the following manner, flat tubular film Fp is between multiple rollers of guide roller group 41, in above and below Suitably contact, be transported towards cutting device 50.

See Fig. 1 and Fig. 3 in the lump, cutting device 50 and the structure of devices for taking-up 60 are described.Fig. 3 is to represent cutting device 50 and the figure of schematic configuration of devices for taking-up 60, (A) is top view, and (B) is side view.It is flat that cutting device 50 has clamping The 4th pinch roll the 51 and the 5th pinch roll 56 of tubular film Fp, regulation act on the tension force of length direction of tubular film Fp Idler roller 52, using the cutting cutter 55 as severing component of tubular film Fp severing.4th pinch roll the 51 and the 5th pinch roll 56 are made up of a pair cylindrical roller respectively, so as to clamp flat tubular film Fp.4th pinch roll 51 and reliever 40 Configure adjacently.5th pinch roll 56 adjoins with devices for taking-up 60, and opens compartment of terrain configuration relative to the 4th pinch roll 51 sky.

Idler roller 52 is disposed between the 4th pinch roll the 51 and the 5th pinch roll 56 at the 4th pinch roll 51.Idler roller 52 configure in contact with flat the above of tubular film Fp.Idler roller 52 is to apply downward power by cylinder (not shown) Mode constitute, to apply to be constituted in the way of tension force to the length direction of flat tubular film Fp.Although it addition, idler roller 52 It is based on to the parts with flat tubular film Fp tension force during severing, but, the most do not allow tension force to act on width Direction.Both sides with the adjacent upstream and downstream of idler roller 52 are provided with support roller 53.Idler roller 52 is not (can scheme with from cylinder Show) mode that the rotary speed of the power that is subject to and the 5th pinch roll 56 the most vertically moves up and down constitutes, hereby it is possible to change Become the tension force of the length direction of flat tubular film Fp.Idler roller 52 is applied the cylinder (not shown) of downward power by following Mode is constituted, and is connected with constituting the tensioning control portion 92 controlling device 90 by signal cable, it is possible to according to from tensioning control The signal in portion 92, is pressed down against idler roller 52 with the power set.It is made up of in the following manner, is pressed down against the setting value of idler roller 52 The biggest, the tension force of the length direction of flat tubular film Fp is the biggest, and setting value is the least, and tension force is the least.

Cutting cutter 55, between idler roller the 52 and the 5th pinch roll 56, is disposed at the 5th pinch roll 56.Cutting cutter 55 In the direction orthogonal relative to the direction that flat tubular film Fp moves, so that band-like film Fb can be made to become the width of regulation Be spaced multiple.Here, it is stipulated that width in the present embodiment, when becoming final products with band-like film Fb The width (adding the width of the change of the period after just severing to segmenting and starting described later) that width is corresponding.Many The lower section of individual cutting cutter 55, is equipped with the severing roller 54 of the orientation extension along cutting cutter 55.At the outer surface of severing roller 54, It is formed with groove in the position corresponding with the cutting cutter 55 of arrangement.Cutting device 50 is made up of in the following manner, by with flat cylinder The state that shape film F p contacts with the outer surface of severing roller 54, makes cutting cutter 55 enter and is formed at the groove on severing roller 54, energy Enough width that flat tubular film Fp is cut into blank volume Fr.From the flat tubular film Fp by cutting cutter 55 severing, Between cutting cutter 55 adjacent at every 1, generate upper and lower two band-like film Fb.

Cutting device 50 also has width detector 58.Width detector 58 be disposed in idler roller 52 and cutting cutter 55 it Between.Width detector 58 is constituted by a pair, so as to detect the outer rim of two sides of the width of flat tubular film Fp Position.Width detector 58 is connected with filler control portion 91 by signal cable, is made up of in the following manner, it is possible to by tested The width (distance between the outer rim of both sides) of the flat tubular film Fp surveyed transmits to filler control portion 91 as signal.

Devices for taking-up 60 has and batches by cutting cutter 55 severing the strip-shaped thin of the top of upper and lower separate band-like film Fb 1st takers-in 61 of film Fb, and batch by cutting cutter 55 severing the band-like film of the lower section of upper and lower separate band-like film Fb 2nd takers-in 62 of Fb.Between the 5th pinch roll the 56 and the 1st takers-in 61, it is equipped and will be cut into the band-like film of multiple row Fb is divided into the 1st expansion roller 65 of each row.Between the 5th pinch roll the 56 and the 2nd takers-in 62, it is equipped and will be cut into multiple row Band-like film Fb is divided into the 2nd expansion roller 66 of each row.

Again return to Fig. 1, continue the explanation that blank rolls the structure of manufacturing apparatus 1.Control device 90 except having above-mentioned filling Fill out outside agent control portion 91 and tensioning control portion 92, also there is drive control part 93.Filler control portion 91 is by the following manner structure Become, according to the signal of the width of the relevant flat tubular film Fp received from width detector 58, to injection valve 28v or row Go out valve 29v transmission opening and closing signal and make valve opening and closing, hereby it is possible to the liquid level of the filler P controlled in parison Rp.Tensioning control portion 92 are made up of in the following manner, according to pre-prepd program, make the power change that cylinder (not shown) is applied on idler roller 52, according to This, it is possible to the tension force of the length direction being applied to flat tubular film Fp during control severing.Drive control part 93 is by following Mode is constituted, it is possible to controls the blank such as screw rod 13 and the 1st～the 5th pinch roll 23,25,35,51,56 and rolls driving of manufacturing apparatus 1 The start and stop in dynamic portion.It addition, in FIG, illustrate filler control portion 91, tensioning control portion 92, drive control part 93 are distinguished Ground is constituted, but, this is the structure that the viewpoint from function represents the most respectively, it is also possible to physically one integrated mass Ground is constituted.It addition, in FIG, illustrate filler control portion 91, tensioning control portion 92, drive control part 93 are housed in 1 Constituting control device 90 in housing, but this is to represent conceptual content, they can also be joined the most discretely ?.

Then, see Fig. 4, illustrate that blank rolls the effect of manufacturing apparatus 1.The blank volume that manufacturing apparatus 1 is carried out is rolled by blank The manufacture process of Fr is a mode of the manufacture method of the coiling body of embodiment for the present invention.Fig. 4 is to represent that blank is rolled up The flow chart of manufacture process.In the explanation of following effect, when mentioning the structure that blank rolls manufacturing apparatus 1, suitable L.Lucidus Turcz. See Fig. 1 to Fig. 3.In blank rolls manufacturing apparatus 1, the synthetic resin raw material supplied from head tank (not shown) is imported into hopper 11.The synthetic resin raw material being directed to hopper 11 is exported to one end of screw rod 13, by screw rod 13 from the lower end of hopper 11 The rotation around axis, melt towards the shape of the mouth as one speaks 15 by force feed.Reach the melting of synthetic resin raw material of the shape of the mouth as one speaks 15 from The shape of the mouth as one speaks 15 is extruded, and becomes parison Rp (extrusion operation: St1).

It is put into the cooling water C accumulating in cooling bath 21 from the parison Rp of the shape of the mouth as one speaks 15 extrusion, and (the bosher that is cooled Sequence: St2).Through circulation pipe 27 to being put to cool down the inside supply filler P of the parison Rp of water C.Parison Rp is also filled with agent P cools down.It is to say, refrigerating work procedure (St2) is by the operation of cooling water C and filler P cooling parison Rp.Cooling parison Rp And the filler P that temperature rises is directed to temperature adjuster (not shown) through circulation pipe 27, alternatively, the filling being cooled Agent P supplies to the inside of parison Rp through circulation pipe 27.So, the filler P circulation of the inside of parison Rp, proceed parison Rp Cooling.Clamped by the 1st pinch roll 23 by cooling water C and filler P chilled parison Rp, become flat.Flat The internal residual of parison Rp is attached to the filler P of the degree on surface.The flat parison Rp passed through at the 1st pinch roll 23 exists It is in period in cooling water C, continues cooled, hereafter, pass through from the 2nd pinch roll 25.

The flat parison Rp internal entrance air stretching device 30 passed through from the 2nd pinch roll 25, because of air Intrinsic pressure and be stretched (stretching process: St3).It addition, the air of the inside of parison Rp in stretching device 30, by rolling up at blank Manufacture device 1 and reach the initial stage before smooth running, by parison Rp or tubular film Fp, to be blown into air condition with the 2 pinch roll the 25 and the 3rd pinch rolls 35 clamp and are enclosed.Air once enters in parison Rp or tubular film Fp, though type Base Rp and tubular film Fp moves, and internal air is also trapped between the 2nd pinch roll the 25 and the 3rd pinch roll 35.With the 2nd The downstream that pinch roll 25 is compared, inside enters the parison Rp of air, by biaxial tension, becomes tubular film Fp.Hereafter, cylinder Shape film F p is pressed into flat by the 3rd pinch roll 35.

The flat tubular film Fp passed through from the 3rd pinch roll 35 is directed to roller group 41 with the state that tension force has relaxed Support.The state that tension force has relaxed typically is applied with the state of the tension force of minimum needed for flat tubular film Fp of transporting. Flat tubular film Fp, by compared with the rotary speed of the 3rd pinch roll 35, reduces the rotary speed of the 4th pinch roll 51, and The stress (relaxing operation: St4) acted on is relaxed in stretching process (St3).The flat tubular supported by guide roller group 41 Film F p is pulled by the 4th pinch roll 51.

The flat tubular film Fp passed through at the 4th pinch roll 51 passes through to be pulled by the 5th pinch roll 56, and via tensioning Roller 52 and support roller 53 arrive cutting cutter 55.Reach the flat tubular film Fp of cutting cutter 55 to be applied in length side To the state of tension force, by cutting cutter 55 with the width severing of packaging film roll that manufactured by segmentation described later as multiple row, become For band-like film Fb (severing operation: St5).Manufacture how many row band-like film Fb and be determined by the packaging film roll that segmentation manufactures Width.As it has been described above, in the present embodiment, the width corresponding with the width of the packaging film roll manufactured by segmentation is equivalent to rule Fixed width.Leftover pieces (flat tubular at the tubular film Fp that the outside compared with two outermost cutting cutters 55 produces The limit youngster of film F p) can also recycle after recovery.

In cutting device 50, if being spent in the length of width by the flat tubular film Fp of cutting cutter 55 severing Short, then exist according to segmentation row amount band-like film Fb add up to short of width situation.Otherwise, if the length of width Spend length, then there is the lower thickness of tubular film Fp, and the cut end of the both sides produced when severing becomes big, the waste of material Become big.Therefore, filler control portion 91, in order to maintain the width of flat tubular film Fp rightly, is examined by width detector 58 Survey by the width of the flat tubular film Fp before cutting cutter 55 severing.The flat cylinder that width detector 58 will detect at any time The width of shape film F p transmits to filler control portion 91.Filler control portion 91 is the flat tubular film Fp's received When width is below preset value, injection valve 28v is opened, inject filler P to circulation pipe 27, make the filler P in parison Rp Amount increase, make the diameter of parison Rp increase.The liquid level of the filler control portion 91 filler P in parison Rp becomes appropriate After, injection valve 28v is closed.On the other hand, when the width of the flat tubular film Fp received is more than preset value, will Dump valve 29v opens, and is discharged by the filler P circulated at circulation pipe 27, makes the liquid level of the filler P in parison Rp close to cooling down The water surface of water C, makes the diameter of parison Rp reduce.The liquid level of the filler control portion 91 filler P in parison Rp becomes appropriate After, dump valve 29v is closed.Although it addition, the diameter at the parison Rp being conditioned is being reflected in by width detector 58 Time lag can be produced before the width of the flat tubular film Fp of detection, but, because the diameter of parison Rp and flat tubular The change of the width of film F p is mild, so, if at the trigger becoming the amount increase and decrease making the filler P to circulation pipe 27 discrepancy Preset value in estimate out surplus capacity, then will not make for the width of flat tubular film Fp is maintained appropriate scope Become to hinder.It addition, due also to the parison Rp between the shape of the mouth as one speaks 15 and cutting cutter 55 and a length of tens meters of tubular film Fp, with A few km that exceedes as the spooling length of blank described later volume Fr is compared the shortest, so, time lag will not become problem.

The tubular film Fp flat by cutting cutter 55 severing and the band-like film Fb that generates are released from the 5th pinch roll 56, The band-like film Fb of upside batches at the rolling tube being assembled on the 1st takers-in 61 through the 1st expansion roller 65, the strip-shaped thin of downside Film Fb batches at the rolling tube (coiling process: St6) being assembled on the 2nd takers-in through the 2nd expansion roller 66.In present embodiment In, when band-like film Fb is batched by the 1st takers-in the 61 or the 2nd takers-in 62, using as conventional the batching in this technical field Method, from winding start to winding terminate make tension force gradually diminish taper tension method batch.Just it is taken up at 1 volume For the length of the band-like film Fb on pipe, from the viewpoint of improving manufacture efficiency, preferably can exist more than 1000 meters More than 3000 meters, more preferably more than 5000m, act on rolling tube from alleviating and batch the band-like film Fb of immediate vicinity On stress from the viewpoint of, can be below 9000 meters, preferably below 7000 meters, more preferably below 6000 meters.With rule The band-like film Fb that fixed length is wound on rolling tube is that Fr rolled up by blank.The blank volume Fr keeping before being subdivided produced exists Warehouse etc..

Blank at temporary safe-keeping is rolled up Fr and is transported to as being different from the packaging film roll that blank rolls the device of manufacturing apparatus 1 After manufacturing device (not shown), pull out band-like film Fb from blank volume Fr, make the length (such as 20 when being subdivided into retail Rice, 50 meters etc.) packaging film roll (segmentation operation: St7).Here, it is also possible to be referred to as having wound band-like film by packaging film roll Coiling body.It is to say, packaging film roll is a form of coiling body with blank volume Fr.It addition, in the present embodiment, bag Dress film roll is to give the final products of consumer, and blank volume Fr is intermediate products.Blank volume Fr is because in severing operation (St5) The width that the width that has been cut into pack film roll is corresponding, so, in segmentation operation (St7), it is not necessary that severing again, Accordingly, the re-winding of band-like film Fb when manufacturing packaging film roll becomes easy.The packaging film roll produced is pasting appearance On the basis of easily finding the strip of paper used for sealing of end (using the part started) of banding film F b, it is housed in cap cuboid to be opened/closed The carton of shape, supply consumer uses.

But, for the blank volume Fr of keeping, assuming that the width of band-like film derived from cutting device 50 be perseverance In the case of Ding (below, the band-like film of this supposition is referred to as " band-like film assumed "), in other words, constant width is being batched The band-like film of hypothesis, in the case of making blank volume, because of the passage of the time in keeping, it is assumed that the width of band-like film Become wider in the part near rolling tube than the outer circumferential side rolled up at the blank away from rolling tube.

Fig. 5 is (to represent the band assumed below with symbol " Fb ' " from the band-like film batching the hypothesis with constant width Shape thin film) begun to pass through regulation time time blank volume Fr ' sectional view.The time of regulation described herein is from batching The band-like film Fb ' that assumes also makes blank volume Fr ' and starts, until pull out the time carrying out keeping to segment, In present embodiment substantially within 3 days.As it is shown in figure 5, when have passed through the time of regulation, compared with the central authorities of radial direction The reason that the width Wc of the band-like film Fb ' of the hypothesis of the position Lc of close rolling tube B is maximum is inferred to be, due to strip-shaped thin Film is viscoelastic body, so, the compression stress of the band-like film Fb ' being wound on the hypothesis in outside plays a role.It addition, as with volume Around the interior width Wb of width of band-like film Fb ' of hypothesis of pipe B adjoining position Lb unlike the vacation in its outside being close to If the wide reason of the width of band-like film Fb ' be inferred to be, the frictional force acted between rolling tube B inhibits hypothesis The expansion of the width of band-like film Fb '.Although interior width Wb is suppressed to expand by the frictional resistance with rolling tube B, but, by In also applying to be wound onto the compression stress of the band-like film Fb ' of the hypothesis in outside, so, it is used for the most external of blank volume Fr ' The width Wa width of outermost of width of band-like film Fb ' of hypothesis of position La.It addition, the strip-shaped thin of the hypothesis shown in Fig. 5 The width of film Fb ' is exaggerated for convenience of description, and actual width does not exist the most extreme difference.In general, from becoming Blank volume elapsed time of starting of Fr ' is the longest, become the hypothesis of blank volume Fr ' band-like film Fb ' when each unit The width of interior change is the least.So, if the width generation of the band-like film Fb ' of the hypothesis of the blank volume Fr ' of keeping is irregular not Together, then when being subdivided and make packaging film roll, produce and manufacture the such undesirable condition of packaging film roll that width is different.

The present inventors establishes following it is assumed that even predict from the blank volume batching the time having begun to pass through regulation The part of the band-like film Fb corresponding with the position that width in the band-like film Fb ' assumed broadens of Fr, makes this part in advance Band-like film Fb narrowed width on the basis of, be wound up into rolling tube B, then when have passed through the time of regulation, it should become The most identical width, and the present invention is expected by excess syndrome.Making based on the blank that this thought embodies is rolled The blank that device 1 is carried out rolls during making, and when the severing of flat tubular film Fp, carries out following such control.

That is, it is viscoelastic body due to band-like film Fb (tubular film Fp), so, make flat tubular film Fp if utilizing Elastic deformation and carry out severing, then elasticity can release and when having restored, the such characteristic of width expansion of band-like film Fb, During the wide position severing of the width that is intended in the width ratio reference position of the band-like film Fb after making just severing, make length direction Its reference position of warp tension ratio severing time big, in the width ratio reference position being intended to the band-like film Fb after making just severing During the position severing of narrow width, little when making its reference position of warp tension ratio severing of length direction.Length direction is acted on during severing Tension force the biggest, the width of elastic band-like film Fb when can release and restore is the widest.

Tensioning control portion 92 prestores the data of the change width of the band-like film Fb ' of hypothesis as shown in Figure 5, Suitable position makes to be applied to the downward power change of idler roller 52, makes to act on by the length of the flat tubular film Fp of severing The tension variation in degree direction.Specifically, tensioning control portion 92 the length direction of band-like film Fb to be made tension force become big time, The downward power making cylinder (not shown) be applied to idler roller 52 becomes big, and the tension force at the length direction of band-like film Fb to be made becomes Hour, the downward power making cylinder (not shown) be applied to idler roller 52 diminishes.Cylinder (not shown) is applied to idler roller 52 The size of downward power such as determines as following.First, infer that the band-like film Fb of the part of severing is being winding to It is in which position (away from the distance of rolling tube B surface) (hereinafter referred to as " inferred position ") time on rolling tube B.Then, it is assumed that will The band-like film Fb ' assumed is wound to rolling tube B and have passed through the time of regulation, the strip-shaped thin of the hypothesis in deduction inferred position Which kind of journey the width of film Fb ' has relative to the width Wb (reference value) of the band-like film Fb ' of the hypothesis being in reference position Lb The difference of degree.It addition, the band-like film Fb of reference position can be to become width between minimum widith Wa and Breadth Maximum Wc Position at random determines, but, in the present embodiment, using the band-like film Fb that contacts with rolling tube B as reference position The band-like film Fb of Lb.Then, with the hypothesis in the width of the band-like film Fb ' of the hypothesis in inferred position and reference position Lb Band-like film Fb ' width difference degree correspondingly, the width ratio base of the band-like film Fb ' of the hypothesis in inferred position When the width of the band-like film Fb ' that level puts the hypothesis in Lb is big (such as, during the Lc of position), make to be applied to the downward of idler roller 52 The setting value of power diminish, make the tension force acting on the length direction of flat tubular film Fp diminish, in inferred position Width hour (such as, the position of the band-like film Fb ' of the hypothesis in the width ratio reference position Lb of the band-like film Fb ' assumed During La), make the setting value being applied to the downward power of idler roller 52 become big, make to act on the length side of flat tubular film Fp To tension force become big.

In other words, if assuming, the tension force making to act on the length direction of film F p in severing operation (St5) is consistently Carry out severing, then batching by film F b of severing ' and have passed through regulation time time, film F b being taken up ' width Position (the position La in Fig. 5) that middle generation is narrower than reference value Wb and the position (position Lc in Fig. 5) wider than reference value Wb In the case of；Severing operation (St5) is narrow with the width ratio of film F b being taken up reference value Wb in the case of assuming in severing Film F p corresponding to position time, correspondingly make to act on the tension force of the length direction of film F p with deviation based on reference value Wb Become big, at the thin film that the position that severing is wide with the width ratio of film F p being taken up reference value Wb in the case of assuming is corresponding During Fp, the tension force acting on the length direction of film F p is correspondingly made to diminish with deviation based on reference value Wb.

Fig. 6 with blank volume Fr state representation while making the tension variation of the length direction of flat tubular film Fp, one While the appearance of the change of the width of the band-like film Fb carrying out severing and being formed.Fig. 6 (A) is just to have batched and length direction Position change the most rightly the blank after the band-like film Fb of width volume Fr sectional view, Fig. 6 (B) be from batched with The position of length direction changes the blank during time that the band-like film Fb of width begun to pass through regulation the most rightly The sectional view of volume Fr.As shown in Fig. 6 (A), after just having batched band-like film Fb, near volume compared with the central authorities of radial direction The narrowest around the width of the band-like film Fb of the position of pipe B.It addition, the width of the band-like film Fb shown in Fig. 6 (A) is for the ease of saying Bright and exaggerated, there is not the most extreme difference in actual width.Shown in the cross section of the blank volume Fr shown in Fig. 6 (A) and Fig. 5 The cross section of blank volume Fr ' is compared, the concavo-convex symmetry of the profile of both sides.This Fig. 6 (A) if shown in just batch after blank volume Fr Through the time of regulation, then as shown in Fig. 6 (B), inner side (near the side of rolling tube B) and outside (away from rolling tube B Side), the difference of width diminishes.Although it addition, shown in Fig. 6 (B) from batch begun to pass through regulation time blank volume Fr Being expressed as, the width of the band-like film Fb becoming blank volume Fr is the most equal, but, Fig. 6 (B) is to represent that concept (is inclined To) figure, strictly speaking, exist on the width of band-like film Fb, observe a little uneven situation.Even if this In the case of, width uneven and firm of the band-like film Fb from the blank volume Fr batching the time having begun to pass through regulation The uneven of width of the band-like film Fb in blank volume Fr (seeing Fig. 6 (A)) after just batching is compared, it will be apparent that diminish.

The position of band-like film Fb when Fig. 7 (A) is to represent severing flat tubular film Fp and the tension force of length direction The curve chart of an example of relation.The transverse axis of the curve chart shown in Fig. 7 (A) is the spooling length of the band-like film constituting blank volume Percentage ratio, the longitudinal axis is that the tension force of the length direction of every 300 mm in width of band-like film is (it is thus possible, for instance be 4 at band-like film In the case of bar, for 4 times of tension force of the longitudinal axis of Fig. 7 (A)).In the curve chart of Fig. 7 (A), solid line T is to be formed and length side To position change the band-like film Fb of width the most rightly time curve, single dotted broken line T ' is to form that to make width be permanent Curve during the band-like film Fb ' of fixed hypothesis.When forming the band-like film Fb ' assumed, make to act on when severing flat The tension force of length direction of tubular film Fp be constant 1.1kg.On the other hand, at the band-like film Fb forming variable-width Time, start to 20% the fewest position of total length from the position (hereinafter referred to as " initial point ") started to the winding of rolling tube B, Gradually diminish from 1.1kg to 0.7kg, start to 50% slightly many positions of total length from the 20% of total length the fewest position, Gradually become big from 0.7kg to 1.25kg, start to 80% slightly many positions of total length from the 50% of total length slightly many positions For constant 1.25kg, start to 90% slightly many positions of total length from the 80% of total length slightly many positions, from 1.25kg Gradually become to 1.4kg big, start to the position of 100% as constant 1.4kg from the 90% of total length slightly many positions.Must From the point of view of, make the tension force acting on the length direction of flat tubular film Fp when severing temporarily diminish, then become big.

Fig. 7 (B) is to represent after the time that the state rolled up with blank have passed through regulation, evens up banding film F b, Fb ', surveys The result of amount width.The transverse axis of the curve chart shown in Fig. 7 (B) is the percentage of the spooling length of the band-like film constituting blank volume Ratio, the longitudinal axis is the width of band-like film.The curve chart of Fig. 7 (B) is by band-like film Fb, Fb ' it is completely pulled out, measure the knot of width Really, the width of the position of 0% in curve chart is the width of initial point (point connected with rolling tube B), the width of the position of 100% It is to roll up Fr, Fr at blank ' time, it is in outmost width.It addition, in the curve chart of Fig. 7 (B), solid line W represents band-like film The width of Fb, single dotted broken line W ' represents the width of the band-like film Fb ' assumed.Knowable to Fig. 7 (B), in the position with length direction Put in the band-like film Fb changing width the most rightly, if with blank volume Fr state through regulation time, then because of Within the difference of lengthwise location and the change of width that produces are limited in 2 millimeters, with the band-like film Fb ' phase assumed Ratio, the uneven of width is inhibited.

As explained above, roll manufacturing apparatus 1 according to the blank about present embodiment and blank rolls and made Journey, because when the tubular film Fp that severing is flat, by making to act on the tension variation of length direction, while being cut into Regulation width, it is possible to the width that the position of length direction changes the band-like film Fb after just severing the most rightly, Thus it is possible to the width of band-like film Fb when suppression carries out batching and become the time that have passed through regulation after blank volume Fr Uneven.By width uneven of the band-like film Fb under the state of suppression blank volume Fr, thin from blank volume Fr When being divided into packaging film roll, it is possible to suppress width uneven of each packaging film roll.

In description above, synthetic resin raw material is polyvinylidene chloride analog copolymer, it is also possible to be main constituent be polychlorostyrene Ethylene, polyamide, polyester, polyolefin etc. belong to the synthetic resin raw material of the viscoelastic body beyond polyvinylidene chloride copolymer. It addition, band-like film Fb is typically single thin film but it also may be plural layers.

In superincumbent explanation, it is cylindric from the synthetic resin of the shape of the mouth as one speaks 15 extrusion, however, it can be beyond cylinder Normal section is tubular or film like, the tabular of polygon, ellipse etc..It is film like, plate at the synthetic resin extruded from the shape of the mouth as one speaks In the case of shape, stretching process can use flat-die method etc. to substitute blow moulding.The front end geometry of the shape of the mouth as one speaks and the synthesis tree being extruded The shape of fat the most suitably determines.

In superincumbent explanation, in severing operation (St5) by the width of the regulation of the band-like film Fb of severing it is and quilt The width that the width of packaging film roll (final products) of segmentation is corresponding, but, such as can also only by with two outermost severings The outside (edge of flat band-like film) that cutter 55 is compared is cut away, and becomes the corresponding width of multiple amounts of final products, carefully Operation break-down is cut into the width of packaging film roll (final products).But, if in severing operation (St5), by band-like film Fb Width with the width severing corresponding with the width of the packaging film roll (final products) being subdivided, then there is no need segmentation time weight Newly it is cut into the width of packaging film roll (final products), it is possible to increase the manufacture efficiency of packaging film roll.

In superincumbent explanation, at the width ratio of severing and the band-like film Fb being taken up at the band-like film Fb ' assumed In the case of tubular film Fp corresponding to reference value Wb narrow position time, correspondingly make effect with deviation based on reference value Wb Tension force in the length direction of tubular film Fp becomes big, at the width ratio of severing and the band-like film Fp being taken up at the band assumed Shape film F b ' in the case of tubular film Fp corresponding to reference value Wb wide position time, with deviation phase based on reference value Wb The tension force acting on the length direction of tubular film Fp is made to diminish with answering, but, according to the band-like film Fb in blank volume Fr The uneven permission of width, the setting value of coiling tension when batching banding film F b, even if not with based on base The tension force of the length direction that the deviation of quasi-value Wb acts on tubular film Fp when the most strictly changing severing is also sufficient for In the case of requirement, it is also possible to act on tubular film when the most strictly not changing severing with deviation based on reference value Wb The tension force of the length direction of Fp.If it is to say, the change of the width of the band-like film Fb ' of hypothesis obtained of binding tests ground Change, when suitably changing severing, act on the tension force of the length direction of tubular film Fp, be allowed to the banding being present in blank volume Fr In the uneven permissible range of the width of film F b.

The noun be associated (being especially associated) with claim below with the explanation of the present invention used and phase With the use of deictic words, unless this specification particularly points out or substantially and contradicted by context, be all construed to relate to odd number with And both plural number.Statement " possesses ", " having ", " including " and " containing ", except as otherwise noted, all as open-ended term (that is, the meaning " include～but be not limited to this ") is explained.Elaborating of numerical range in this specification, unless in this theory Bright book particularly points out, is all intended only to play the effect as mentioning the abbreviated notation meeting each value in the range of this respectively Really, as each value is just as listing the most respectively, include in description.The all of side of explanation in this specification Method, unless particularly pointed out in this manual or obvious and contradicted by context, all can be carried out according to all of appropriate order. The all of example used in this specification or exemplary wording (such as, " etc. "), unless advocated especially, be all intended only to more Well the present invention is described, is not intended to the scope of the present invention is limited.Any wording in description can not be construed as by Do not record the wording usually to represent that key element in the claims is integral as implementing the present invention.

In this manual, include in order to implement the present invention and including optimal form that the present inventor is known, to this Preferred embodiment illustrating of invention.If it will be understood by those skilled in the art that read described above, it should be clear that this A little deformation preferred embodiment.The present inventor expects that skilled person suitably applies such deformation, it is contemplated that the present invention with The method beyond method specifically described in this specification is carried out.Therefore, the present invention, as applicable law allows, wraps Include correction and the equivalent of content described in whole this specification attached claims.Further, unless in this specification In particularly point out or substantially and contradicted by context, the arbitrary combination of the above-mentioned key element in all of deformation is also contained in the present invention In.

Symbol description

1 blank rolls manufacturing apparatus

30 stretching devices

50 cutting devices

52 idler rollers

55 cutting cutters

60 devices for taking-ups

90 control device

Fb band-like film

The band-like film that Fb ' assumes

Fp tubular film

Rp parison

Claims (6)

1. a manufacture method for coiling body, including:

The stretching process that the elongate thin film formed by viscoelastic body is stretched；

After described stretching process, change the tension force of the length direction acting on described thin film, while by described thin film It is cut into the severing operation of the width of regulation；

Batch the coiling process by the described thin film of severing in described severing operation.

The manufacture method of coiling body the most according to claim 1,

Described severing operation is made up of in the following manner, makes to act on the tension force of the length direction of described thin film, from will be with described volume When taking described thin film severing corresponding to the winding start position in operation, cut out to by the described thin film corresponding with following position Till time disconnected, diminish continuously and/or periodically, hereafter, become big continuously and/or periodically, institute's rheme Put assume that make in severing operation tension force by constant and in the time that have passed through regulation in the thin film that batched when carrying out severing Shi Kuandu becomes the widest position.

The manufacture method of coiling body the most according to claim 1 and 2, also includes:

Segmentation operation, from complete described coiling process begun to pass through regulation time after, pull-out be taken up described thin Film, to rewind than the short length of length of batching in described coiling process.

The manufacture method of coiling body the most according to claim 1 and 2,

Described severing operation is constituted in the way of described thin film is cut into multiple row.

The manufacture method of coiling body the most according to claim 3,

Described severing operation is constituted in the way of described thin film is cut into multiple row.

6. coiling body manufactures a device, possesses:

Stretching device, stretches the elongate thin film formed by viscoelastic body；

Severing component, is cut into the width of regulation by the described thin film of stretching；

Idler roller, the tension force to the described thin film applying length direction of described the wanted severing of severing component；

Devices for taking-up, the described thin film batched by severing；

Control device, control described idler roller, make to act on the tension force of the length direction of described thin film, from severing and by described volume During described thin film corresponding to the position of the beginning that fetching puts the winding carried out, to described thin corresponding with following position of severing Till during film, diminish continuously and/or periodically, hereafter, become big continuously and/or periodically, institute's rheme Put assume that make in severing operation tension force by constant and in the time that have passed through regulation in the thin film that batched when carrying out severing Shi Kuandu becomes the widest position.