CN1180390A - Apparatus for laminating webs - Google Patents

Abstract

The invention provides a laminating apparatus for laminating a longitudinal web (19) on a transverse web (28) by maintaining transverse fibrous elements (62) in the transverse direction as much as possible, wherein a skew correction device (39) for correcting the skew of the transverse web in contact with both selvage portions (57, 57) of the transverse web, includes first and second rolls (101, 102) arranged on the sides of one selvage and the other selvage of the transverse web, a common roll (108) arranged on the opposite side of the transverse web with respect to the first and second rolls, and a support means (60) for supporting the first roll, second roll and common roll so as to hold one selvage (57) of the transverse web (28) by the first or second roll and an end of the common roll. The travelling speed of at least one selvage (57) of the transverse web (28) can be changed.

Description

Fiber web lamination device

technical field

The present invention relates to a lamination (lamination) device for laminating a web of a transverse web and a longitudinal web. The web has longitudinal fibrous elements aligned approximately parallel to the longitudinal conveying direction.

Background technique

Laminating devices of the above type are disclosed in, for example, Japanese Patent Laid-Open Nos. 4-82953 and 4-267149. Fig. 7 is a perspective view showing the conventional laminator. In FIG. 7 , the vertical web 1 has vertical fibrous elements 10 , and the horizontal web 2 has horizontal fibrous elements 9 . The horizontal fiber web 2 also has a selvedge 3 for transportation. The vertical web 1 and the horizontal web 2 are conveyed to the lamination roll 5 and laminated on the lamination roll 5 , respectively.

Fig. 8 is a side view of the laminating device shown in Fig. 7 . 9 and 10 are partial plan views of the above device. As shown in FIG. 8 , before the horizontal web 2 reaches the laminating roller 5 , the horizontal fibrous elements 9 tend to sag and sag, and as shown in FIG. 9 , the width of the horizontal web 2 becomes narrow due to the sagging. Therefore, a pair of lateral guides 8 and the like are provided at a position immediately before being introduced into the laminating roll, and the transverse web 2 is stretched left and right by the lateral guides 8 before being introduced into the laminating roll 5 .

As shown in Figure 7, the longitudinal fiber web 1 with a predetermined width is first introduced into the introduction roll 4, and then sent to the lamination roll 5 after being reversed at the introduction roll 4, and laminated on the horizontal web 2 that has been introduced into the lamination roll 5 . Therefore, the horizontal web 2 is pressed against the laminating roll 5 by the longitudinal tension of the longitudinal web 2 . At least one of the sides where the longitudinal web 1 and the transverse web 2 are in contact with each other has an adhesive layer, is heated during the movement of the outer periphery of the laminating roller 5, and in the discharge roller (nip roller) 6, the longitudinal web 1 and the transverse web 2 are The fiber web 2 is bonded to form a product (laminate) 7 .

When the horizontal fiber web 2 and the vertical fiber web 1 are just to be laminated, as shown in FIG. 9 , the horizontal fibrous elements 9 must be arranged approximately transverse to the longitudinal conveying direction. However, the oblique shape shown in FIG. 10 may appear in some cases. The reason is that the two selvedges of the horizontal fiber web 2 are not completely equal. That is, because force is applied to the conveying direction, the horizontal fibrous element 9 cannot be tensioned. In order to introduce the horizontal fiber web 2 into the laminating roller 5, the two selvedges 3 must be pulled forward, so the two selvedges 3 are subject to considerable tension. .

At this time, when the cross-sectional areas or tensile properties of the two selvedges 3 and 3 are inconsistent, there will be a difference in the stretching of the two. Although the difference is small, it will gradually accumulate with the passage of time, and the selvedge on the side that is easy to stretch The transfer is slow, thereby forming an oblique row of the horizontal fiber elements 9 . After the horizontal fibrous element 9 is inclined to a certain degree, the horizontal fibrous element 9 itself plays the role of stretching the selvage on the side that is moving slowly, so the tension burden on the side that is moving slowly is reduced, and it is no longer stretched and becomes balanced. state, the fiber will move in an inclined state.

After the horizontal fibrous elements 9 are tilted, the horizontal fibrous elements 9 and the vertical fibrous elements 10 of the longitudinal fiber web 1 are inevitably not perpendicularly intersecting, and a desired product cannot be obtained. Therefore, oblique travel must be strictly prevented. Once tilted it must be corrected. However, there is a limit to the homogenization of the two selvedges 3, and it is difficult to prevent fiber tilting by homogenization. Therefore, when the fiber tilt occurs, the production line needs to be temporarily stopped and restarted, which is very disadvantageous to productivity.

The present invention is made in view of the above problems, and its object is to provide a fiber web lamination device, which can keep the transverse fibers of the transverse fiber web in the transverse direction as much as possible, so that the horizontal fiber web and the longitudinal fiber web can be aligned correctly. laminated.

SUMMARY OF THE INVENTION

The fiber web laminating device of the present invention is characterized in that it is equipped with laminating rollers and skew correction devices; Horizontal fibrous elements and two selvedges arranged in the conveying direction, the longitudinal fiber web has longitudinal fibrous elements arranged parallel to the longitudinal conveying direction; the skew correction device is equipped with a first roller arranged on one side of the selvedge of the transverse web , the second roll arranged on the side of the above-mentioned one side of the other side of the horizontal fiber web, the common roll arranged on the opposite side of the horizontal fiber web opposite to the first and second rolls, and the support mechanism, the support mechanism supports the first roll , the second roll and the common roll, so that one end of the first roll and the common roll can pinch one side of the horizontal fiber web, and the other end of the second roll and the common roll can pinch the other side of the horizontal fiber web The edge can change the running speed of at least one edge of the horizontal fiber web.

In this structure, when the horizontal fibrous element is tilted, the selvage on the side that moves slowly is transported faster than the side that moves faster by the skew correction device, or the selvage on the side that moves faster is slightly restrained. Move, or use these two measures together, to correct the inclination of the transverse fiber element. This skew correcting device is installed in front of the transverse guide on the transverse web transport path.

It is preferable to provide a first moving mechanism and a second moving mechanism, the first moving mechanism makes the first roller and one end of the common roller relatively close to or away from, and the second moving mechanism makes the second roller and the other end of the common roller relatively Approach or stay away. In this way, when one end or the other end of the common roll is close to the corresponding first or second roll and the other is far away from the corresponding first or second roll, the common roll is in an inclined state.

Preferably, one of the first and second rolls and the common roll is a drive roll, and the other is a non-drive roll. Alternatively, one of the first and second rolls and the common roll is braked by a brake mechanism. Preferably, the first and second rolls are arranged on the upper side of the horizontal web, and the common roll is arranged on the lower side. As the first and second moving means, it is preferable to use an air cylinder that vertically supports both ends of the rotating shaft of the common roll. In addition to air cylinders, hydraulic cylinders, connecting rods, cams, etc. can also be used.

Preferably, the above-mentioned first and second moving mechanisms move the relevant first or second rollers relatively close to the common roller when performing skew correction respectively, and clamp the selvedge of the horizontal fiber web on the first or second roller. Between the 2 rolls and the common roll, make the horizontal fiber web travel at the same speed as the 1st or 2nd roll, and keep the relevant 1st or 2nd roll away from the common roll when skew correction is not performed Move to release the clamping state of the first or second roller and the common roller to the horizontal fiber web.

Brief description of the drawings

Fig. 1 is a perspective view of a laminate manufacturing process using the apparatus of the present invention.

Fig. 2 is a perspective view of a skew correction device used in the present invention.

Fig. 3 is a front view of the skew correction device shown in Fig. 2 .

Fig. 4 is a sectional view taken along line IV-IV in Fig. 3 .

Fig. 5 is a partial front view showing the use state of the skew correction device shown in Fig. 2 .

Fig. 6 is a partial front view showing another usage state of the skew correction device shown in Fig. 2 .

Fig. 7 is a perspective view showing a conventional fiber web laminating device.

Fig. 8 is a side view showing the state of use of the conventional fiber web laminating device shown in Fig. 7 .

Fig. 9 is a partial plan view showing the state of use of the conventional fiber web laminating device shown in Fig. 7 .

Fig. 10 is a partial plan view showing another example of the state of use of the conventional fiber web laminating device shown in Fig. 7 .

Best Mode for Carrying Out the Invention

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of a laminate manufacturing process using the apparatus of the present invention. In the figure, on the left side of the fiber web lamination device 20, there is an extruder 11 for manufacturing a longitudinal fiber web, and high-density polyethylene and low-density polyethylene are introduced into the extruder 11, and extruded from the extruder 11. The cylindrical film 12 is extruded, and the extruded cylindrical film 12 has a three-layer structure of low-density polyethylene on the outside and inside, and high-density polyethylene in the middle.

The above-mentioned cylindrical film 12 is folded into a sheet by a pair of pinch rollers 13, and then cut into a wide sheet by a cutting machine 14. Then, the film 12 to be a wide sheet is stretched longitudinally to a predetermined magnification by a primary stretcher 15 in warm water. At this time, the width of the film 12 is narrowed corresponding to the stretching ratio. Then, it is further stretched to a predetermined magnification by the secondary stretching machine 16 in hot air. Also at this time, the width of the film 12 is narrowed in accordance with the stretching ratio.

Then, the stretched film 12 is cut in the longitudinal direction by a cutting tool 17 . After fiber splitting, the film 12 becomes a sheet with regular mesh-like slits. Next, the split film 12 is expanded to a predetermined width in the transverse direction by an expanding device 18 to form a longitudinal fiber web 19 mainly composed of longitudinal fiber elements 61 arranged approximately parallel to the longitudinal conveying direction. The longitudinal web 19 is heated by a heat treatment roll (not shown in the figure) to eliminate deformation, and then introduced between the lamination roll 29 and the introduction roll 30 of the web lamination device 20 .

On the right side of the web laminating device 20, an extruder 21 for producing a horizontal web is provided. High-density polyethylene and low-density polyethylene are introduced into an extruder 21, and a cylindrical film 22 having a two-layer structure with low-density polyethylene on the outside and high-density polyethylene on the inside is extruded. Next, the cylindrical film 22 is folded into a sheet by a pair of pinch rollers 23 to form a four-layer film having two layers of high-density polyethylene on the inside and a low-density polyethylene layer on the outside.

The film 22 is pinched by pinch rollers 24 . In this way, the inner two high-density polyethylene layers are lumped together, and the film 22 has a three-layer structure having a low-density polyethylene layer on the outer side of the high-density polyethylene layer. Then, the film 22 is introduced between a shear 25 and a back-up roll 26 . In regions other than both end portions in the width direction of the film 22 , slits arranged in the transverse direction are alternately formed by the shears 25 . Next, the film 22 is stretched in the transverse direction with the transverse stretching device 27 to obtain a transverse fiber web 28. The transverse fiber web 28 is mesh-shaped and mainly has transverse fibrous elements 62 arranged in the transverse direction. There is a selvedge 57 (Fig. 2) for transportation at the top. The horizontal web 28 is introduced between the lamination roll 29 and the introduction roll 30 of the web lamination device 20 .

The web laminating device 20 is provided with a skew correcting device 39 shown in FIGS. After the horizontal fiber web 28 has been corrected skewed by the skew correcting device 39, it is introduced between the lamination roll 29 and the introduction roll 30 as shown in FIG. .

After the vertical fiber web 19 and the horizontal fiber web 28 are introduced between the laminating roller 29 and the introduction roller 30, the longitudinal fiber web 19 squeezes the horizontal fiber web 28 on the laminating roller 29, and then the two are crimped by the discharge roller 31. Fiber web. In this way, the laminated body 32 in which the longitudinal fibrous elements 61 and the horizontal fibrous elements 62 are arranged in warp and weft is formed. The laminated body 32 is wound up by a winding device 34 via a guide roller 33 .

Next, the skew correction device 39 of the horizontal web 28 will be described with reference to FIGS. 2 to 6 . Fig. 2 is a perspective view of the skew correction device used in the present invention. As shown in the figure, the skew correction device 39 includes a first driving roller 101 , a second driving roller 102 and a support mechanism 60 . The first drive roller 101 is disposed above one side of the fabric edge 57 of the horizontal web 28 . The second driving roll 102 is disposed above the other side selvedge 57 of the horizontal web 28 . The support mechanism 60 supports these driving rollers and a common roller 108 described later so that they are properly spaced apart from each other. In this embodiment, the drive rollers 101, 102 are mounted on a common shaft 103, and the shaft 103 is rotatably supported by bearings 104, 105. The shaft 103 is connected to a motor (not shown) through a pulley 106 and a belt 107, and is driven by a common motor. Therefore, only one drive unit can be used.

A long common non-driven roll 108 is arranged below the transverse web 28 relative to the two drive rolls 101 , 102 . The left end of the common non-driving roller 108 faces the left driving roller 101 , and the right end of the common non-driving roller 108 faces the right driving roller 102 , and each end of the horizontal web 28 can be clamped.

Fig. 3 is a front view of the skew correction device shown in Fig. 2 . As shown, the left end of the common non-driven roller 108 is supported by the piston rod 111 of the left cylinder 109 and the right end of the common non-driven roller 108 is supported by the piston rod 112 of the right cylinder 110 .

Fig. 4 is a sectional view taken along line IV-IV in Fig. 3 . As shown in the figure, 113 is a frame that slidably supports the rotation shaft of the common non-driving roller 108 . Therefore, the air cylinder 109 can relatively move one end portion of the common non-driving roller 108 closer to or farther away from the driving roller 101 . The air cylinder 110 enables the other end of the common non-driven roller 108 to move relatively closer to or farther away from the driven roller 102 .

Therefore, when the skew correction is performed by one air cylinder 109 or 110, the ends of the relevant driving roller and the non-driving roller are moved relatively close (at this time, the non-driving roller is inclined), and the selvedge 57 of the horizontal fiber web 28 is clamped. Hold between the ends of the driving roll and the non-driving roll, make the selvedge 57 of the horizontal fiber web 28 walk at the same speed as the peripheral speed of the driving roll, so that the skew of the horizontal fiber web 28 is corrected (see Fig. 5 and Figure 6).

When the correction is not performed, the ends of the relevant drive roll and non-drive roll are moved relatively away from each other, and the clamping state of the horizontal web 28 by the drive roll and the non-drive roll is released. That is, in the state where the left and right air cylinders 109 and 110 are simultaneously closed, as shown in FIGS. 3 and 4 , the horizontal web 28 is not clamped at all. When the left side cylinder 109 moves, as shown in Figure 5, the left side cloth edge 57 of the horizontal fiber web 28 is clamped, and when the right side cylinder 110 moves, as shown in Figure 6, the right side cloth edge 57 of the horizontal fiber web 28 is clamped. Edge 57 is clamped.

Next, the action of the present embodiment having the above configuration will be described.

As shown in Figure 1, when the horizontal fiber web 28 that has passed through the stretching process is about to enter the laminating roller 29, the selvedges 57 on both sides are stretched by the transverse guides 56 (see Figure 2), and become a transversely tensioned state. The longitudinal fiber web 19 inserted from the introduction port 30 is pressed against the laminating roll 29 .

As shown in FIG. 2, the support mechanism 60 of the skew correction device 39 arranged in front of the lateral guide 56 is in a normal non-operating position. That is, as shown in FIG. 3 , the common non-driving roller 108 is located at a position away from the two driving rollers 101, 102, and the selvedges 57 on both sides of the horizontal fiber web 28 are not separated by the two ends of the common non-driving roller 108 and the driving roller 101. , 102 clamping.

When the operator finds that the horizontal fiber web 28 is in an oblique state, the cylinder 109 (110) of the supporting mechanism corresponding to the side of the selvedge 57 that is transferred slowly is operated, and the end of the common non-driving roller 108 is moved toward the opposite side. The drive rolls 101 (102) move in close proximity, clamping the selvedge 57 of the cross web 28 between the end of the common non-drive roll 108 and the opposing drive roll 101 (102) (see Figures 5 and 6) . Adjust the motor so that the peripheral speed of the drive roller 101 (102) is greater than the speed of the slow side selvedge 57 of the horizontal fiber web 28, so that the walking speed of the slow side selvage 57 is increased to catch up with the fast side selvedge. 57. In this way, the skew of the horizontal web 28 can be corrected. Therefore, the horizontal fiber-shaped elements 62 of the horizontal fiber web 28 can be kept in the transverse direction as much as possible, and the horizontal fiber web 28 and the vertical fiber web 19 can be accurately laminated.

Since the selvedge 57 of the horizontal fiber web 28 does not extend in the horizontal direction, its thickness is larger than that of the stretched horizontal fibrous element 62 . Therefore, even if the part of the horizontal fibrous element 62 enters the position where the driving roller 101 (102) and the common non-driving roller 108 are sandwiched, it is basically not sandwiched, so the fiber is not wound.

As mentioned above, in the above-mentioned embodiment, the case where the traveling speed of the selvage edge 57 on the side of the slow-feeding side is increased has been described, but the present invention is not limited thereto. For example, correction may be performed by the following method. That is, the air cylinder 109 (110) of the support mechanism 60 on the fast side of the horizontal fiber web 28 is moved, the side selvage 57 on the fast side is clamped by the driving roller 101 (102) and the common non-driven roller 108, and the motor is adjusted. , so that the peripheral speed of the driving roller 101 (102) is lower than the speed of the fast side selvedge 57, so that the rotation of the driving roller 101 (102) is slowed down, so that the motor and the driving roller 101 (102) are used as brakes , the progress of the fast side selvedge 57 is slowed down.

In addition, it is also possible to use a braking device instead of the motor to slow down the progress of the fast side of the selvage, so that the same effect can also be achieved. In this case, the selvedge 57 of the horizontal web 28 is clamped between the upper and lower nip rolls, and one of the nip rolls is braked by frictional braking.

In addition, the horizontal fiber web and the vertical fiber web are not limited to the fiber webs in the above-mentioned examples, either. That is, the horizontal fiber web can adopt such a fiber web: the inner layer is an extensible thermoplastic resin (HDPE, PET, PP, etc.), and the inner layer is formed by an adhesive thermoplastic resin with a melting point lower than that on both sides. Layers are sandwiched to form a film with a sandwich structure. On this film, except for the selvedge, intermittent slits such as staggered patterns are formed in the horizontal direction, and the slit portion is extended along the width direction of the film.

The longitudinal fiber web can use such a fiber web: the inner layer is extensible, thermoplastic resin (HDPE, PET, PP, etc.), and the two outer layers are films of adhesive resin with a melting point lower than that of the inner layer. Longitudinal micro-slits are formed by juxtaposing extended ribbon lines. Alternatively, after stretching the above-mentioned film in the longitudinal direction, it is cut in the longitudinal direction and spread to a predetermined width. Alternatively, the above-mentioned film is formed by forming intermittent slits in the longitudinal direction and then extending in the longitudinal direction.

In addition, as the horizontal fiber web, a fiber web in which an arbitrary non-woven fabric is extended in the lateral direction except the cloth edges on both sides to increase the fiber component in the lateral direction may be used. Similarly, as the longitudinal fiber web, a fiber web obtained by extending an arbitrary nonwoven fabric in the longitudinal direction and increasing the fiber components in the longitudinal direction may be used.

The horizontal stretching method of the horizontal fiber web can adopt the most general stretching machine. Also can adopt the simple and easy extension machine that discloses by a pair of belt pulley and belt combination among the patent publication No. 1138234.

In the above-mentioned embodiments, the continuous process from the production of the horizontal fiber web and the vertical fiber web to lamination was described, but it is also possible to manufacture the horizontal fiber web and the vertical fiber web separately and then laminate them.

Industrial Applicability

As described above, by adopting the present invention, the horizontal fibrous elements that tend to run obliquely can be laminated as much as possible in the transverse direction, so that the product quality can be stabilized and the yield can be improved, and there is no need to stop the production line for adjustment. Therefore, Productivity can be greatly improved.

Claims (10)

1. The lamination device (20) of fiber web is characterized in that, is equipped with lamination roller (29) and skew correction device (39); Lamination roller (29) is used for horizontal fiber web (28) and longitudinal A fiber web (19) is laminated, and the horizontal fiber web (28) has horizontal fibrous elements (62) arranged transversely to the longitudinal transport direction and two cloth edges (57, 57) arranged at both ends of the transverse direction, The longitudinal fiber web (19) has longitudinal fiber-like elements (61) arranged approximately parallel to the length conveying direction; the skew correction device (39) is in contact with the two selvedges of the horizontal web sent to the laminating roller at a predetermined speed, and corrects Skewing of the horizontal fiber web; the skew correction device is equipped with a first roller (101) arranged on one side of one side of the horizontal fiber web, and a second roller arranged on the above-mentioned side of the other side of the horizontal fiber web (102), a common roll (108) and a support mechanism (60) arranged on the opposite side of the horizontal fiber web opposite to the first and second rolls, the support mechanism (60) supports the first roll (101), the second Roller (102) and common roller (108), make one end of the 1st roller and common roller can pinch one side cloth edge of horizontal fiber web, make the other end of the 2nd roll and common roll can pinch the edge of horizontal fiber web Selvedge on the other side; the walking speed of at least one side of the selvedge (57) of the horizontal fiber web (28) can be changed. 2. The laminating device (20) of fiber webs as claimed in claim 1, characterized in that, the above-mentioned supporting mechanism is equipped with a first moving mechanism and a second moving mechanism, and the first moving mechanism makes the first roller (101) and the second moving mechanism One end of the common roller (108) relatively approaches or moves away, and the second moving mechanism relatively approaches or separates the second roller (102) and the other end of the common roller (108). 3. The laminating device (20) of fiber webs as claimed in claim 2, characterized in that, one of the above-mentioned first and second rolls (101, 102) and the common roll (108) is a driving roll, and the other One side is the non-driven roller. 4. The fiber web laminating device (20) according to claim 3, wherein the first and second rolls (101, 102) are driven by a common drive mechanism. 5. The laminating device (20) of fiber webs as claimed in claim 2, characterized in that, when it is necessary to carry out skew correction, the relevant first or second rollers (101, 102) and the common roller (108) ) moves relatively close to clamp the selvedge (57) of the horizontal fiber web (28) between the first roll or the second roll and the common roll, so that the selvage edge of the horizontal fiber web is aligned with the first or second roll. The peripheral speed of the doubling rollers is the same as the running speed. When the skew correction is not performed, the relevant first or second rollers (101, 102) are moved relatively far away from the common roller (108), and the first or second rollers are released. The clamping state of the horizontal fiber web (28) between the roller and the common roller. 6. The laminating device (20) of fiber webs as claimed in claim 2, characterized in that, one of the above-mentioned first and second rolls (101, 102) and the common roll (108) is controlled by a braking mechanism. move. 7. The laminating device (20) of fiber webs as claimed in claim 1, characterized in that, the above-mentioned skew correction device (39) is arranged on a transverse guide (56) in the transport path of the horizontal fiber web (28). ) in front of. 8. The laminating device (20) of fiber webs as claimed in claim 1, characterized in that, the above-mentioned first and second rolls (101, 102) are arranged on the two selvedges (57, 57) of the horizontal fiber web (28). 57), the common roll (108) is arranged on the lower side of the horizontal fiber web. 9. The laminating device (20) of fiber webs as claimed in claim 2, characterized in that, the first and second moving mechanisms are composed of air cylinders (109, 110), and the air cylinders (109, 110) respectively Both ends of the rotating shaft of the roller (108) are supported so as to be movable up and down. 10. The laminating device (20) of fiber webs as claimed in claim 2, characterized in that, the first moving mechanism makes one end of the common roller (108) approach or move away from the first roller (101), and the second The moving mechanism makes the other end of the common roller (108) approach or move away from the second roller (102), and one end or the other end of the common roller (108) approaches the corresponding first or second roller (101, 102) , while the other side is away from the corresponding first or second roller, the common roller (108) is in an inclined state.

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