JPH0919964A - Manufacture of laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the physical properties of the continuous sheet of a fiber reinforced thermoplastic resin sheet uniform without disturbing fiber orientation and without the joint of the cut sheets by laminating the sheets while sheet end faces of the cut sheets being put together with each other to be melt bonded and integrated. SOLUTION: Transfer to a cut upper surface is controlled lest the front end of a succeeding cut sheet 12 is overlapped with the rear end of a preceding cut sheet 11 and the rear end of the succeeding cut sheet 12 is curved. The upper surface of the cut sheet is pressed by a floating preventive sheet 14 lest the front end of the succeeding cut sheet 12 is overlapped with the rear end of the preceding cut sheet 11 and the front end of the succeeding cut sheet 12 is curved. By butting the discontinuous cut sheets with the fiber orientations of the sheets arranged in parallel, the cut sheets can be converted into a continuous sheet. In this way, a uniform continuous laminated sheet can be made.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fiber-reinforced laminated sheet obtained by laminating a fiber-reinforced resin sheet in which a thermoplastic resin such as polypropylene resin is impregnated on a continuous reinforcing fiber sheet such as glass fiber or carbon fiber. It relates to a continuous manufacturing method and apparatus.

[0002]

2. Description of the Related Art Reinforcing fiber sheets such as glass fibers and carbon fibers are aligned in one direction and aligned in a sheet shape, which is impregnated with a thermosetting resin such as an epoxy resin or an unsaturated polyester resin for pre-curing. The resulting fiber reinforced resin sheet is known as a unidirectional prepreg. Such a unidirectional prepreg changes the direction of the fibers according to the shape and required performance of the target molded product and sequentially superimposes them into a laminated state, and puts this into a molding machine to process it into the target molded product. Used to do.

Recently, a fiber reinforced resin sheet using a thermoplastic resin such as a polypropylene resin in place of the thermosetting resin such as an epoxy resin or an unsaturated polyester resin has been developed to eliminate the brittleness of the thermosetting resin. Has been done.

It has been pointed out that the unidirectional prepreg using a thermoplastic resin such as the polypropylene resin, unlike the unidirectional prepreg of the thermosetting resin, has the following problems during the laminating operation.

That is, since it is not tacky, it is essential to use a device such as an electric iron to melt and bond the resin between the superposed layers and fix the resin between the layers. Since it is easy to tear in the fiber direction when it is pulled or bent in the direction, or along a curved surface, it is necessary to pay sufficient attention to the laminating work.

The unidirectional prepreg made of a thermoplastic resin is used in a laminated state by changing the orientation direction of the fibers at a predetermined number and at a predetermined angle, but the work of laminating at the specified angle is done manually. Since this has to be done, not only does it take a long time to work, but mistakes in the stacking angle are also likely to occur. Further, the one-way prepreg is liable to be broken in the fiber direction, so that it is difficult to handle.

Therefore, it is known that the above problems can be solved by superposing two or more unidirectional prepregs at different angles and then welding the respective surfaces to form a laminated sheet.

As a method for continuously producing this laminated sheet, there is used an FW method (FilamentWinding), that is, a method in which a unidirectional prepreg is wound around a substrate in multiple layers by changing the direction, if necessary. It is very difficult to continuously wind the unidirectional prepreg around the prepreg base material, and to weld the entire surface to form a sheet, and in this method, the laminated sheet has three or more layers.

[0009]

SUMMARY OF THE INVENTION In the present invention, the conventional "one-way prepreg" using a thermoplastic resin requires a number of laminating steps, requires skill of an operator, and has poor handleability. Therefore, a continuous sheet of fiber-reinforced thermoplastic resin sheet reinforced with fibers arranged in one direction should be laminated and heat-sealed and integrated while aligning the sheet end faces of the cut sheet at an arbitrary fiber orientation angle. According to the present invention, there is provided a manufacturing method and device for continuously and rapidly manufacturing a continuous laminated sheet which has no sheet seams of cut sheets and has uniform physical properties without disturbing fiber orientation, and solves these problems. The purpose is.

[0010]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the sheet end face of the cut sheet of the fiber-reinforced thermoplastic resin sheet and the continuous sheet of the fiber-reinforced thermoplastic resin sheet. It was found that the sheet end faces of the above sheet should be aligned, and the continuous method and apparatus for producing a laminated sheet of the present invention was completed.

That is, the gist of the present invention is (1)
Continuous fibers are aligned in one direction to form a sheet, and the fiber-reinforced thermoplastic resin sheet obtained by impregnating the aligned fiber sheet with a thermoplastic resin is cut to a fixed length, and sequentially supplied to a butt device, A cut sheet group in which the sheet end surfaces are butted against each other while aligning the cut end surfaces, and a continuous sheet that is a fiber-reinforced thermoplastic resin sheet run in parallel with the cut sheet group are supplied to the laminating section,
Both sheets are heated by hugging them on a heating roll.
Manufacture of a laminated sheet characterized in that it is welded, then sandwiched and pressure-bonded by a nip roll, and further hugged in a cooling roll to cool and harden the pressure-bonded sheet, and the entire sheets are welded together to continuously produce a laminated sheet. Is the way.

In the present invention, in the above method, the continuous sheet, which is a plurality of fiber-reinforced thermoplastic resin sheets that are run in parallel with the cut sheet group, is fed to the laminating section in a state where the adjacent end faces are butted against each other. You can also

In the present invention described above, (2) continuously laminating the cut sheet and the continuous sheet in the fiber orientation direction at an arbitrary angle of 45 to 135 degrees, and (3) the thickness of the fiber reinforced thermoplastic resin sheet. Is 30 μm or more and 500 μm or less, and the volume content of the reinforcing fiber is 30% or more and 85% or less, (4) the reinforcing fiber is glass fiber or carbon fiber, and the thermoplastic resin is polypropylene-based, polystyrene-based, or Polyethylene resin,
(5) The cut sheet passes through the gap between the belt conveyor running immediately before the laminating section, which is traveling faster than the laminating speed, and the floating prevention sheet, which is placed above the belt conveyor. By providing a speed difference with the cut sheet of the preceding cut sheet, the rear end surface of the preceding cut sheet and the front end surface of the succeeding cut sheet are continuously abutted against each other and continuously supplied to the laminating section. By separately detecting the adjacent end faces of each continuous sheet that is running, the parallel movement of the feeding axis of each continuous sheet so that each sheet end face coincides with the arbitrarily set reference line After aligning the adjacent sheet end faces of the sheets, fix the position of one original sheet feeding shaft, and butt the sheet end faces of continuous sheets that are fed from the other original sheet. (7) When sandwiching two fiber reinforced thermoplastic resin sheets from the upper and lower surfaces with endless belts, after passing through the abutting portion that can absorb the deviation amount of the preceding cut sheet, The supplied two fiber-reinforced thermoplastic resin sheets are wrapped around a heating roll together with the belt, and the fiber-reinforced thermoplastic resin sheet is heated and melted through the belt and then pressure-bonded. After the fiber-reinforced thermoplastic resin sheet is cooled and cured through the hugging belt, the laminated sheet of the fiber-reinforced thermoplastic resin sheet that has been welded is peeled from the belt. (8) Heated and melted fiber-reinforced thermoplastic sheet When cooling the plastic resin sheet, the fiber reinforced thermoplastic resin sheet sandwiched between the endless belts is used. By moving the position of the straightening roll along the cooling roll, the holding angle to the cooling roll is changed, and the amount of warpage of the laminated sheet is adjusted. (9) Rotation of the electric motor of the straightening roll By moving the straightening roll along the cooling roll by converting it into rotation, (10) a device for supplying a continuous web from above and below is provided in the preceding step of the laminating unit, and the laminating unit is provided with (upper web / cut Sheet / continuous sheet), (upper web / cut sheet / continuous sheet / lower web), (cut sheet / continuous sheet / lower web), (upper or lower web / cut sheet) or (upper or lower web) / Continuous sheet), and the laminated sheet is continuously manufactured.

According to the present invention, (11) continuous fibers are aligned in one direction to form a sheet, and a fiber-reinforced thermoplastic resin sheet obtained by impregnating the aligned fiber sheet with a thermoplastic resin is cut out to a fixed length and sent out. Cut sheet feeding device,
The cut sheet is sequentially supplied to the abutting device, and the cut sheet abutting device that aligns the cut end faces of the cut sheet to abut the sheet end faces without interruption, and a continuous sheet that is a fiber-reinforced thermoplastic resin sheet that runs in parallel with the cut sheet. A feeding device or a feeding device for a continuous sheet that is a plurality of fiber-reinforced thermoplastic sheets that run in parallel with a cut sheet and feeds the adjacent sheets while abutting the adjacent end faces, and hugging the cut sheet and the continuous sheet in a heating roll. It is heated and welded by means of a nip roll, then sandwiched and pressure-bonded by nip rolls, and then a laminating device that cools and cures the pressure-bonded sheets by hugging them in a cooling roll. A manufacturing apparatus for manufacturing the same is also provided.

In the present invention described above, (12) the sheet material is sent to a certain length through the dancer roll and then cut at the cutting portion, and the cut sheet is placed on the upper and lower two-stage tables by the sorting conveyor if necessary. It is sorted and sent out to a fixed position on the table by the positioning roll, and then the direction of travel is 45-
It is a cut sheet feeding device which is changed at an arbitrary angle of 135 degrees and is fed onto a belt conveyor.
(13) The sheet ends of the respective cut sheets are butted against each other due to the speed difference between the preceding cut sheet and the subsequent cut sheet, and the preceding cut sheet sent by the belt conveyor is nipped by the supply guide roll and the feed speed is increased. When it lowers, the rear end surface of the preceding cut sheet and the front end surface of the succeeding cut sheet are butted against each other, and if necessary, a cut sheet floating prevention sheet is placed on the upper surface of the butted section and the cut sheet and the belt conveyor are held down by their own weight. In order to improve the accuracy of the cut sheet butting, and to position the preceding cut sheet and the subsequent cut sheet in the lateral direction at the front and side of the floating prevention sheet, positioning devices are arranged on the left and right sides of the belt conveyor. It is a matching device, and (14) continuous sheet A is a continuous sheet. The continuous sheet B is positioned between the original sheet and the guide rolls, and the position of each adjacent end surface of the continuous sheets A and B is detected by an end face detector installed between the continuous sheet original sheet and the guide rolls. Slide each delivery reel in line with the reference line to bring the adjacent end faces closer to each other, and further move the continuous sheet B to the continuous sheet A by the width adjustment guide to move the sheet end surface from 0 mm to 1 mm.
The sheet aligning device is designed so as to send out to the laminating section at intervals within (15) a plurality of heating rolls and cooling rolls, upper and lower endless belts and dancer rolls, respectively, and cut sheets that have been sent in, continuous The sheets A and B, and the upper and lower webs are sandwiched by upper and lower endless belts, and the upper and lower surfaces are sequentially heated by being held by the heating roll together with the endless belts, and then the upper and lower surfaces are held by the cooling roll in the same manner as when heating. By sequentially cooling, the straightening roll was moved along the circumference of the cooling roll to the cooling roll in the temperature range where the shape of the resin was fixed, and the holding angle was adjusted to correct the warp of the laminate sheet in the vertical direction. It is preferably a laminating device.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the following technical idea. That is, in the past, in the work of laminating unidirectional prepregs, in most cases, when the reference continuous fiber direction of the prepreg is set to 0 degree, the angle of the next prepreg is set to 45 to 135 degrees. Therefore, if a combination of the fiber directions of the superposed prepregs of 0 degree and 45 to 135 degrees is prepared in advance, the object of lamination can be achieved by stacking several two-layer laminates at the time of use. It is possible to rationalize the stacking work.

Further, unlike the case of manually laminating one by one like the conventional laminating work, it is possible to reduce the influence on the physical properties of the molded product due to a slight discrepancy in the laminating angle. Further, as described above, the laminated sheet preliminarily laminated and integrated by the whole surface welding has the layers bound to each other, so that the strength of the fiber in the direction at right angles is reinforced as compared with the single leaf prepreg. The difficulty of tearing in the fiber direction is solved, and at the same time, it becomes possible to obtain an improvement in handleability.

The laminated body of the fiber-reinforced thermoplastic resin sheet according to the present invention is basically of a two-layer structure obtained by stacking a cut sheet and a continuous sheet which are composed of the fiber-reinforced thermoplastic resin sheet. Used as a sheet material. As the cut sheet and the lower continuous sheet, basically, a fiber-reinforced thermoplastic resin sheet manufactured by the same manufacturing method is used, but it is not limited to this.

The thermoplastic resin used in the laminate of the fiber-reinforced thermoplastic resin sheet of the present invention includes polystyrene, polyvinyl chloride, high density polyethylene, polypropylene, polyamide, polycarbonate, polybutylene terephthalate, polystyrene terephthalate, and polyether sal. Examples include, but are not limited to, phon, polysulfone, polyetherimide, polyetheretherketone, polyphenylene sulfide, and the like.

The fiber material used for the laminate of the fiber-reinforced thermoplastic resin sheet of the present invention includes synthetic resin fibers such as glass fiber, carbon fiber, aramid fiber (registered trademark "Kepler" etc.), silicon carbide fiber and the like. Examples thereof include inorganic fibers, titanium fibers, boron fibers, and metal fibers such as stainless steel, but are not limited thereto.

The form of the web prepared using the above-mentioned fibrous material is not particularly limited. For example, it is in the form of a non-woven fabric, and generally is in the form of a cloth such as glass fiber. Etc. are generally used.

There are various methods for producing a fiber-reinforced thermoplastic resin sheet, and each has its own characteristics and drawbacks. However, it is necessary to appropriately select which manufacturing method to use the fiber-reinforced thermoplastic resin sheet according to the properties required in the field of use.

For example, the fiber-reinforced thermoplastic resin sheet by the bent belt system has good fiber alignment, little resin deterioration, can be thinned, and has high fiber content (Wf60-80).
%), But it is not suitable for the production of thick products. However, by applying the method of the present invention, it is possible not only to solve the drawback that a thick product cannot be manufactured, but also to obtain a laminate having excellent physical properties.

The fiber-reinforced thermoplastic resin sheet of the present invention is a continuous sheet having a width of 50 mm to 2000 mm, but is not necessarily limited to this range. The width is preferably 200 mm to 1200 mm, more preferably 500 mm to 1000 mm.

Next, a method and an apparatus for continuously producing a laminated sheet of a fiber-reinforced thermoplastic resin sheet according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an example of an overall view of an apparatus suitable for continuous production of the laminated sheet of the present invention. In the figure, the fiber reinforced thermoplastic resin sheet, in the cut sheet feeding portion,
A continuous sheet is prepared in which a cut sheet having a MD direction of 0 degree and an arbitrary fiber direction of 45 to 135 degrees is prepared, and having a fiber direction parallel to the MD direction from the continuous sheet feeding portion,
If necessary, the continuous webs from the upper and lower continuous web feeding portions are integrated with each other through the cut sheet butting portion and guided to the laminating portion. The laminating section consists of a heating section and a cooling section. In this section, the cut sheet and continuous sheet are integrally thermocompressed, cooled and hardened, further accumulated in the accumulation section, and then cut into regular lengths or laminated sheet products are wound. Taken. Hereinafter, each step will be described sequentially.

Feeding part of cut sheet: In FIGS. 2 and 3, a cut sheet material 1 made of a fiber reinforced thermoplastic resin sheet is fed through a dancer roll 2 to a feed roll 3
After being fed by a fixed length by, for example, a length of 1300 mm, the feed roll 3 is stopped and the raw material 1 is cut into a fixed length by the cut portion 4. The length of the cut sheet to be cut is basically the same as the full width of the continuous sheet group supplied from the lower side. At this time, the original 1 is being fed at a constant speed, and the stoppage of the original due to cutting is the dancer roll 2
Is absorbed by.

If necessary, the cut sheets are sorted one by one on the upper and lower two-stage table 6 by the sorting conveyor 5 (see FIG. 3), and are fed to a fixed position on the table by the roll 7 for positioning.

After that, the cut sheet is delivered to the roll 8
Then, the traveling direction is changed at an arbitrary angle of 45 to 135 degrees (see FIG. 2), and the sheet is fed onto the belt conveyor 9. A guide plate 10 is provided in front of the delivery roll 8 in order to deliver the cut sheet smoothly.

The portions 1 to 3, 5 and 7 can be horizontally rotated about the point α in the range of 45 to 135 degrees with respect to the continuous sheet, and the cut portion 4 slides accordingly. You can This allows the end surface of the continuous sheet and the cut surface of the cut sheet to be aligned, and θ (45 to 135) with respect to the orientation of the continuous fibers of the continuous sheet.
It can be sent out on a belt conveyor so that the orientation direction is (degrees).

The cut length X of the cut sheet can be obtained from the relational expression X = W / sin θ between the stacking angle θ and the total width W of the continuous sheet group.

An example of the operation of each section is shown in the time chart of FIG. In the figure, each roll of the positioning roll 7 and the delivery roll 8 represents the operation of the upper table, and the operation of each roll of the lower table is shifted by one cycle.

Cut sheet abutting portion: It is difficult to cut out a cut sheet from a continuous sheet state and continuously align the sheet end faces instead of the cut face with an accuracy of 0 to 1 mm and at the same time supply the cut sheet. Therefore, it is necessary to provide a cut sheet abutting portion as shown in FIG. 5, for example, separately from the cut sheet feeding portion.

This abutting is based on the preceding cut sheet 11
By providing a speed difference between the following cut sheet 12 and
The sheet end faces of each cut sheet can be butted against each other.

The cut sheet is fed by the belt conveyor 9 from the cut sheet feeding section to the laminating section.
At this time, if the laminating speed, in other words, the molding speed is V ₁ and the traveling speed of the belt conveyor 9 is V ₂ , they have a relationship of: · V ₁ <V ₂ .

From the cut sheet feeding section to the belt conveyor 9
As a result, the preceding cut sheet 11 is fed at a speed of V ₂ , but at the same time as it is nipped by the supply roll and the heating roll 28 for the laminating section, the feeding speed of the preceding cut sheet 11 drops from V ₂ to V ₁ . At the same time, the preceding cut sheet 11 and the belt conveyor 9 start to slide.

Here, the succeeding cut sheet 12 which has been delayed due to the cutting and conversion of the conveying direction and the like catches up with the preceding cut sheet 11, and the end faces of the respective sheets are abutted with each other without interruption.

Further, the cut sheet group whose sheet end faces are abutted is passed from the belt conveyor 9 onto the passing plate 13 and supplied to the laminating section. At that time, the cut sheets 11 and 12 are continuous sheets due to the circumferential difference. Although a delay may occur as compared with 16 'and 17', in this butt method, the amount of deviation of the cut sheet delay can be absorbed by slipping between the cut sheets 11 and 12 and the belt conveyor 9. it can.

At this time, it is necessary to control the movement of the succeeding cut sheet 12 to the upper surface of the cut sheet so that the leading end of the succeeding cut sheet 12 does not overlap with the trailing end of the preceding cut sheet 11 and the trailing end of the succeeding cut sheet 12 does not bend.

The structure is first controlled by the thickness of the cut sheet. That is, when the thickness of the cut sheet is t, it is a method of abutting the end faces of the cut sheet by passing the gap x where t <x <2t. However, when the thickness t of the cut sheet is thin, it may be difficult to adjust the distance x, and it may be impossible to perform matching at high speed and stably.

Therefore, it is preferable that this portion has a structure using the floating prevention sheet 14.

The floating prevention sheet 14 is arranged on the upper surface of the belt conveyor 9 and has a function of holding the cut sheet and the belt conveyor 9 with a uniform pressure.

As the floating preventing sheet 14, a plate-shaped sheet having rigidity and elasticity and having a structure in which the cut sheets 11 and 12 are pressed against the belt conveyor 9 and a sheet-shaped sheet are hung and cut by the weight of the sheet. An example is a structure in which the sheets 11 and 12 are pressed against the belt conveyor 9. The plate material is stainless steel
Examples thereof include metals such as aluminum and resin plates, but are not limited to these. Also, as the material of the sheet,
Examples thereof include vinyl chloride and Teflon sheets, but are not limited thereto.

Cut sheet 1 with floating prevention sheet 14
The pressing pressures of 1 and 12 differ depending on the thickness of the cut sheet, the type of matrix resin and fibers of the cut sheet, the material of the floating prevention sheet 14, the speed difference between the preceding cut sheet and the succeeding cut sheet, and the matrix resin is polypropylene. The volume content of the glass fiber as the reinforcing fiber is 70%, the thickness of the cut sheet is 0.2 mm, and the speed difference between the preceding cut sheet and the succeeding cut sheet is 5 to 50 m /
In the case of min, the range of 0.1 to 5.0 g / cm ² is desirable.

The floating prevention sheet 14 presses the upper surface of the cut sheet 12 so that the leading edge of the subsequent cut sheet 12 and the trailing edge of the preceding cut sheet 11 do not overlap with each other and the leading edge of the subsequent cut sheet 12 does not bend. become.

The cut sheets 11 and 1 are provided on the front side of the anti-floating sheet 14 and on the lateral side of the anti-floating sheet 14.
Positioning devices 15 and 15 'for producing two lateral positions
Are arranged on the right and left sides of the belt conveyor 9, and the cut sheets 11 and 12 can be aligned at a certain position and fed to the laminating section by being symmetrically brought toward the center of the belt conveyor.

Further, this positioning device (15 and 1
5 ') is when the stacking angle is 135 ≧ θ> 90, 90> θ ≧ 45 so that the cut sheets do not shift laterally when they are butted, or when the butted end faces of the cut sheets are bent, It also has a function of fixing the cut end surface of the cut sheet so that the cut sheet does not tilt when they are butted.

Since the cut sheets can be made into a continuous sheet by abutting the discontinuous cut sheets while aligning the fiber orientations of the sheets in parallel, there is no joint between the cut sheets and the physical properties are eliminated. It is also possible to manufacture a continuous laminated sheet that is uniform in terms of physical properties.

By the above-described butting method, the joint portion of the cut sheet is in a state where there is no joint portion, and it is possible to keep the physical properties uniform. Here, the state where the cut sheet has no joint will be described. In FIG. 6, a vertical cut surface of the joint portion is indicated by an arrow AA.
The thickness of the sheet is t, and the minimum thickness of the joint portion is t '. Here, a product having a t '/ t ratio of 0.9 to 1.0 is referred to as a state having no joint portion. If it is less than 0.9, the fibers are insufficient and the strength is insufficient. Further, if it exceeds 1.0, the joints may appear when it is attached to the molded body.

Continuous sheet feeding section (sheet aligning device):
As shown in FIG. 7, the respective centers of the continuous sheet raw fabrics 16 and 17 are arranged so as to be offset from each other by a diameter D or more of the continuous sheet raw fabric, and are fed out in parallel. Continuous sheet 1 in side view
6 is a guide roll 18 to 20, a continuous sheet 17 '
Is supplied to the laminating section via the guide rolls 21 to 23. From the viewpoint of production efficiency, it is preferable that the continuous sheets 16 and 17 have the same winding length, and the feeding speed V ₄ of the continuous sheet is always the same as the laminating speed V ₁ .

Each of the continuous sheet feeding reels can slide laterally. The continuous sheet 16 ′ is provided between the continuous sheet material 16 and the guide roll 18, and the continuous sheet 17 ′ is provided between the continuous sheet material 17 and the guide roll 21 by the end face detectors 24 and 24 ′. By detecting the position of each adjacent end surface of 16 'and 17', and sliding each payout reel according to an arbitrary reference line, each adjacent end surface of the continuous sheets 16 'and 17' is adjusted from 0 mm to 1 mm. It can be sent out to the guide rolls 19 and 22 at intervals of within.

As a method of adjusting the end surface positions of the continuous sheets 16 'and 17', a steering roll method or the like can be considered in addition to the above method, but the method is not limited to these.

The continuous sheet 16 'is controlled with a constant tension from the original fabric 16 to the laminating portion. Continuous sheet 1
7'is controlled from the original fabric 17 to the guide roll 21, and from the guide rolls 22 and 23 to the laminating section with a constant tension. Thus, the tension between the guide rolls 21 and 23 is applied to the continuous sheet 17 'by the weight of the dancer roll 25.

Continuous sheet 1 passing through the guide roll 22
7'is moved to the continuous sheet 16 'by the width adjustment guide 26, and the end faces of the respective sheets are abutted.

By abutting the end faces of the sheets in this manner, the joint portions of the continuous sheet are free from the joint portions, and the physical properties can be kept uniform.

Here, a state in which there is no joint portion of the continuous sheet will be described. In FIG. 6, the joint portion is the arrow B-
Represented by B. In this case, the state without the joint portion can be considered in the same manner as the state without the joint portion of the cut sheet.

Further, the continuous sheet floating prevention sheet 27 is installed in the same manner as the cut sheet abutting portion so that the sheet end faces do not overlap or bend when they are abutted.

In FIG. 7, a two-strand continuous sheet is used, but a single-strip or three-strip or more structure may be used.

Laminating part: First, considering the heat welding of such a sheet, a far infrared heater, a hot air heater,
It is possible to melt the matrix resin by non-contact heating such as.

However, when the unidirectional prepreg using the above thermoplastic resin is heated without contact,
As the matrix resin melts, the matrix resin contracts and the sheet shape collapses, making it impossible to stack.

In the present invention, not only the above problems are solved by contact heating and cooling the sheet through the endless belt, but also the molten resin does not stick to the surface of the heating body or the like. In addition, by cooling and curing while sandwiched between the endless belts, the fibers are not disturbed, the peelability from the endless belts is good, and the surface properties of the laminate sheet can be improved.

In FIG. 8, the laminating section is composed of heating rolls 28 to 31, cooling rolls 32 to 35, upper and lower endless belts 36 and 36 ', and dancer rolls 37 and 37'. An auxiliary roll may be provided between the heating roll 31 and the cooling roll 32 to eliminate the slack of the endless belts 36 and 36 '.

The cut sheet 11, the continuous sheets 16 'and 17', and the upper and lower webs 38 and 38 ', which have been fed in, are sandwiched between the upper and lower endless belts 36 and 36', and the endless belts 36 and 3 are provided.
The upper and lower surfaces are sequentially heated while being held by heating rolls 28 to 31 together with 6 '. Upper and lower webs 38 and 38 '
The following are generally used as PET, P
Nonwoven fabric made of P, PET-PP mixed, nylon, etc., felt of PET, PP, PET-PP mixed, nylon, etc., film or sheet made of various resins, various foaming sheets, various urethane sheets, wood-based sheet , Metal foils such as aluminum, copper and iron, metal vapor-deposited resin films or sheets, various woven fabrics, papers, decorative films or sheets such as cloth, and combinations of the above.

The heating temperature is preferably such that when the temperature reaches the nip roll 39, the temperature of the adhesive surface becomes higher than the melting temperature of the matrix resin, but if it is heated to too high a temperature, the resin flow and the reinforcing fibers are disturbed due to a decrease in the resin viscosity. If the matrix resin is polypropylene, the ultimate temperature is in the range of 160 to 180 ° C., preferably 165 to 175 ° C., because of the problem of resin deterioration.

After that, the nip roll 39 presses and integrates it and sends it to the cooling roll.

The nip pressure at this time varies depending on the matrix resin of the resin sheet, the thickness, the volume content of the reinforcing fibers, etc., but the matrix resin of the resin sheet is polypropylene and has a thickness of 200 μm, and the volume content of the reinforcing fibers is In the case of 70%, it is usually 0.01 to 10 kg / cm, preferably 0.1.
It is in the range of 1 to 1 kg / cm.

Thereafter, like the heating section, the cooling rolls 32 to 35 are used.
In the form of being hugged, the upper and lower surfaces are sequentially cooled. As the cooling temperature, it is desirable that the temperature of the adhesive surface at the time of reaching the straightening roll 40 be equal to or lower than the curing temperature of the matrix resin. The cooling temperature in the vicinity of the guide roll 41, which is the portion where the endless belts 36 and 36 'are separated, differs slightly depending on the material and surface condition of the matrix resin and the endless belts 36 and 36'. It is desirable that the temperature is below the curing temperature of the matrix resin of the resin sheet.

The straightening roll 40 on which the endless belt is interposed can be moved along the circumference of the cooling roll 33, and the straightening roll 40 is moved so that the contact area between the sheet and the cooling roll is intermittent or continuous. By changing the position to move the position to reach the solidification temperature of the matrix resin,
Thus, the warp of the laminated sheet in the vertical direction can be corrected. When the straightening roll 40 is moved, the slack endless belts 36 and 36 'are absorbed by the dancer rolls 37 and 37' provided above and below, respectively. Also, this dancer roll 37 and 37 '
Also serves to adjust the tension of the upper and lower endless belts 36 and 36 'to a constant value.

In this laminating method, the tensions of the upper and lower endless belts 36 and 36 'need to be controlled separately. This tension is applied to the endless belt 3
6 and 36 'vary greatly depending on the material, width, belt circumference, etc.

The endless belts 36 and 36 '
EPC (Edge Position)
Guide rolls 42 and 4 for the controller)
2'is provided. As described above, the steering roll method is adopted as a belt meandering correction method in the figure, but the meandering correction method is not limited to this depending on the material of the belt and the like.

Regarding the method of correcting the warp of the laminate sheet in the vertical direction by moving the above-mentioned straightening roll 40 and adjusting the holding angle to the cooling roll 33,
Further details will be described.

Generally, in the production of a single layer or laminated sheet of a thermoplastic resin, a curl phenomenon may occur in the sheet depending on the characteristics of the resin and the production conditions. The warp of the sheet becomes an obstacle at the stage of processing or using the sheet and often becomes a defect in the final product. To correct the warp of the seat,
When performing with multiple heating / cooling rolls that have a constant contact area with the sheet, change the temperature of the cooling roll to keep the temperature of the front and back of the resin sheet constant in order to respond to changes in the necessary correction amount of warpage. It is necessary to keep it, but this temperature change causes a time lag, so that it is not possible to respond promptly. Also,
Similarly, when the amount of residual warp after correction of warp is measured and this is fed back to change the cooling condition, it is not possible to quickly respond.

The present inventors have found that it is possible to balance the internal stress and flatten the thermoplastic resin sheet by giving a stress opposite to that required to generate warpage in the laminated sheet. . Specifically, on the cooling roll surface having a shape opposite to the warp before correction of the warp, cooling is performed so as to be equal to or lower than the solidification temperature of the thermoplastic resin, that is, the cooling roll and the laminated sheet on a certain cooling roll. It has been found that by continuously changing the contact area with the sheet, the position of the roll surface when the thermoplastic resin impregnated in the sheet reaches the setting temperature can be arbitrarily moved.

FIG. 9 is a view showing the essential parts of the cooling roll and the straightening roll. In FIG. 9, 33 is a cooling roll, 40
Is a straightening roll, 43 is a straightening roll moving motor, 4
4, 45 are gears, 46 is a straightening roll moving frame, 4
Reference numeral 7 is a cooling medium supply / discharge port, and 48 is a chain sprocket.

In the present invention, since it is necessary to move the straightening roll along the circumference of the cooling roll, the rotation of the straightening roll moving motor 43 is rotated by the gears 44 and 4.
The method of converting to the movement of the straightening roll via No. 5 was adopted.

Gear 45 and straightening roll moving frame 46
Are fastened by bolts. The rotation given from the straightening roll moving motor 43 is transmitted from the gear 44 to the gear 45 and is rotated together with the straightening roll moving frame 46, so that the straightening roll 40 can be moved along the circumference of the cooling roll 33. it can.

The cooling roll 33 is driven by a chain sprocket 48, and a bearing is engaged between the shaft of the cooling roll 33 and the gear 45. Therefore, the rotational movements of the gear 45 and the straightening roll moving frame 47 are not interfered with the rotational drive transmitted from the chain sprocket 48.

In this way, the straightening roll 40 is put into the state in which the endless belts 36 and 36 'are interposed, and the straightening roll 40
By moving the endless belts 36 and 36 'and the wrapping angle of the cooling roll 33, that is, the contact time, it is possible to adjust the warp amount of the laminated sheet.

The warp will be described with reference to FIG. In sample ABCD, side A-D, side B-C
Is parallel to the traveling direction of the laminated sheet, and the sides AB and D-
C is perpendicular to the traveling direction of the laminated sheet. Sample AB
The CD is placed on a horizontal surface, the points A, B, C and D at the four corners are perpendicularly drawn to the horizontal surface, and the intersections with the horizontal plane are a, b, c and d, respectively. The distance L ₁ between A-a and B-
The distance between b L _2, is defined as C-c between the distance L _3, D-d between warp L of the sample average value of the distance L ₄ of the. According to the present invention, the range of L can be 0 to 3 cm. If the value of L exceeds 3 cm, the warp is large and it is inconvenient to use. In the present invention, a 25 cm × 25 cm sample is cut out.

Since the straightening rolls are required to move and adjust delicately, it is preferable to use a model such as a variable speed motor as the straightening roll moving motor.

[0081]

【Example】

Example 1 Here, as a fiber-reinforced thermoplastic resin sheet, manufactured by Mitsui Toatsu Chemicals, Inc., trade name (PREGLON P30-PN)
A 650 mm wide raw fabric was used, and as the continuous sheet, two raw fabric sheets were arranged in parallel so that a laminated sheet having a width of 1300 mm was formed. The laminating angle was (0 ° / 90 °), and the laminating speed was 15 m / min as the molding condition.
And

The cut length of the cut sheet is 1300 mm. Furthermore, the feeding cycle of cut sheet is The feed speed at the cut sheet feeding section is 48m.
/ Min.

The feeding speed of the belt conveyor 9 is shown in FIG.
It is required under the following conditions.

The distance between the trailing edge of the cut sheet 49 supplied before and the leading edge of the cut sheet 50 at the moment when the next supplied cut sheet rides on the belt conveyor 9 is E.
The cut sheet to be supplied next is the belt conveyor 9
The tip F of the cut sheet 50 at the moment of being supplied on the
When the distance from the position G where the end faces of the cut sheets 49 and 50 are butted against each other is H, the belt conveyor speed V ₂ is: V ₂ = HV ₁ / (HE) where V ₁ = production speed The relationship holds. Under this experimental condition, E = 0.2 (m) H = 2.1 (m) and the laminating speed is 15 m / min.
The speed of the belt conveyor 9 is V ₂ = 16.57 m / min.

The laminated thermoplastic resin sheet sandwiched between the endless belts 36 and 36 '(thickness 0.3 mm × 2 sheets) made of Teflon-impregnated glass cloth comprises heating roll groups 28 to 28.
31, specifically, the first heating roll 28, the second heating roll 29, the third heating roll 30, and the fourth heating roll 31.
The entire impregnated resin is melted by being heated by. The endless belt tension is 30 kg / m. The set temperature of each heating roll is a temperature at which the entire impregnated resin melts, and differs depending on the type of the laminated thermoplastic resin sheet.
In the case of a polypropylene sheet containing 70% by volume of glass fiber (thickness: 0.2 mm, number of sheets: 2), the temperature is about 210 ° C.

In this way, the laminated thermoplastic resin sheet is heated to a predetermined temperature. In the case of polypropylene sheet containing 70% by volume of glass fiber, the temperature of the laminated surface is about 170
The temperature is raised to ℃.

A pressure bonding roll 39 is used as the fourth heating roll in order to ensure the melting of the resin constituting the laminated thermoplastic resin sheet.

The nip pressure at this time is 0.5 kg / cm. Here, if the pressure is too high, the fibers will be disturbed together with the resin flow.

Next, the laminated thermoplastic resin sheet that has been heated is the cooling roll group 32 to 35, specifically, the first cooling roll 32, the second cooling roll 33, and the third cooling roll 34.
And it is cooled by the fourth cooling roll 35. The set temperature of each cooling roll varies depending on the type of the laminated thermoplastic resin sheet, but is about 40 ° C. in the case of a polypropylene sheet containing 70% by volume of glass fiber. Naho, the heating rolls 28-31 and the cooling rolls 32-35 used here are 40
It is 0 mm x 1600 mmL (effective length 1400 mm).

In this way, the laminated thermoplastic resin sheet is cooled to a predetermined temperature. In the case of a polypropylene sheet containing 70% by volume of glass fiber, it is cooled until the temperature at the interface between the sheet and the belt reaches about 70 ° C.

The position of the straightening roll arranged on the second cooling roll is appropriately changed to change the contact area between the cooling roll and the laminated thermoplastic resin sheet so that the laminated thermoplastic resin sheet does not warp.

A laminated thermoplastic resin sheet having no warp was obtained through the above steps. The amount of warpage in the 25 cm × 25 cm sample was 2.0 cm. The minimum thickness ratio t '/ t of the joint portion between the cut sheet and the continuous sheet was 0.93. Also, during the production of laminated sheets,
The molten resin did not stick to the belt or roll.

The result of measuring the internal temperature of the laminated sheet in this experiment is shown in FIG. As can be seen from this figure, the position where the internal temperature of the laminated sheet reaches the solidification point of 120 ° C. (point K) is on the second cooling roll.
Specifically, it is recognized as a point K on the cooling roll 33 in FIG.

Comparative Example 1 Next, the case where no warp countermeasure is taken will be described with reference to FIG.

As shown in FIG. 13, a sheet heated by a plurality of heating rolls 51 and pressed by a nip roll 52 was drawn straight out and cooled and cured by a cooling roll group 53. The laminated structure of the sheet was (90 ° layer / 0 ° layer).
As the fiber-reinforced thermoplastic resin sheet, a product name (PREGLON P30-PN) manufactured by Mitsui Toatsu Chemicals, Inc. was used.

In this case, the laminated sheet was curved so as to form a concave surface due to the difference in shrinkage ratio of each layer. 25 cm x 25 c
The amount of warpage in the cut-out sample 54 of m was 6.5 cm.

[0097]

According to the method and apparatus for producing a laminated sheet of the present invention, the cut surfaces of the cut sheets are butted against each other, and if necessary, the end faces of the continuous sheets that are adjacent to each other are butted against each other, so that the cut sheet and the continuous sheet are joined together. Since it is supplied to the laminating unit, heated / welded, cooled / solidified, it is possible to produce a laminated sheet that is physically seamless and has no seams between sheets.
It is possible to stack cut sheets in any fiber direction by sending the cut sheets on a belt conveyor while being changed at any angle of ˜135 degrees. Furthermore, by moving the straightening roll along the circumference of the cooling roll and adjusting the holding angle, it is not necessary to adjust the temperature of the cooling roll, it is possible to respond flexibly and quickly to changes in the amount of warp correction, and feedback to the warp is easy. And stable production.

[Brief description of the drawings]

FIG. 1 is an example of an overall view of an apparatus suitable for continuous production of a laminated sheet of the present invention.

FIG. 2 is an example of a cut sheet feeding unit.

FIG. 3 is an example of a cut sheet distribution unit.

FIG. 4 is an example of a time chart of the operation of each part at the time of distribution.

FIG. 5 is an example of a plan view and a side view of a cut sheet butting portion.

FIG. 6 is an enlarged view of the position of the joint portion and the joint portion.

FIG. 7 is an example of a plan view and a side view of a continuous sheet feeding unit.

FIG. 8 is an example of a side view of a laminating unit.

FIG. 9 is an example of essential parts of a cooling roll and a straightening roll.

FIG. 10 is a diagram showing a relationship between cutting of a sample and measurement of a warp.

FIG. 11 is an example of a relationship diagram for obtaining a relationship between a laminating speed and a belt conveyor speed.

FIG. 12 is a diagram showing an example of a temperature change of a laminated surface of laminated thermoplastic resin sheets.

FIG. 13 is an example of a cross-sectional view of a laminated thermoplastic resin sheet showing the occurrence of warpage.

[Explanation of symbols]

 1 Cut sheet original fabric 2 Dancer roll 3 Feed roll 4 Cutting section 5 Sorting conveyor 6 Two-stage table 7 Positioning roll 8 Feeding roll 9 Belt conveyor 10 Guide plate 11 Preceding cut sheet 12 Subsequent cut sheet 13 Passing plate 14 Floating prevention sheet 15, 15 'Positioning device 16, 17 Continuous sheet material 18-23 Guide roll 24 End face detector 25 Dancer roll 26 Width guide 27 Second floating prevention sheet 28-31 Heating roll 32-35 Cooling roll 36 Endless belt 37 Number 2 dancer rolls 38 upper and lower webs 39 nip rolls 40 straightening rolls 41 guide rolls 42 EPC guide rolls 43 straightening roll moving motors 44, 45 gears 46 straightening roll moving frames 47 cooling medium supply / discharge ports 4 Chain sprocket 49 supply the cut sheet 50 (for Comparative Example) belt conveyor at the moment when riding on cut sheet 51 heated roll 52 nip rolls (for Comparative Example) 53 drawer cooling rolls 54 cut samples

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B32B 5/00 B32B 17/04 Z 17/04 7310-4F B29C 67/14 G // B29K 23: 00 25:00 105: 08 307: 04 309: 08 B29L 9:00 (72) Inventor Koujiro Motai 1190 Kasama-cho, Sakae-ku, Yokohama, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Inventor, Satoshi Kishi Kanagawa 1190 Kasama-cho, Sakae-ku, Yokohama Mitsui Toatsu Chemicals Co., Ltd. (72) Inventor Toshihiro Toyota 24-5 Honami, Hojo-cho, Kasai City, Hyogo Prefecture

Claims (16)

[Claims] 1. A continuous fiber is unidirectionally aligned to form a sheet, and a fiber reinforced thermoplastic resin sheet obtained by impregnating the aligned fiber sheet with a thermoplastic resin is cut to a predetermined length,
Laminate a cut sheet group that sequentially supplies the sheet to the butting device and aligns the cut end surfaces of the cut sheets with each other and continuously butts the sheet end surfaces, and a continuous sheet that is a fiber-reinforced thermoplastic resin sheet that runs in parallel with the cut sheet group. Part of the sheet, and the sheets are heated and welded by hugging them on a heating roll, then sandwiched and crimped by a nip roll, and the sheets are then welded by cooling and curing by hugging them on a cooling roll. A method for producing a laminated sheet, which comprises continuously producing the laminated sheet. 2. A continuous fiber is unidirectionally aligned to form a sheet, and a fiber-reinforced thermoplastic resin sheet obtained by impregnating the aligned fiber sheet with a thermoplastic resin is cut to a predetermined length,
Sequentially supplying to a matching device, a cut sheet group in which the cut end surfaces of the cut sheets are aligned against each other without interruption, and a continuous sheet that is a plurality of fiber-reinforced thermoplastic resin sheets run in parallel with the cut sheet group. The sheets are supplied to the laminating unit with the end faces adjacent to each other abutting, and both sheets are heated and welded by hugging them on a heating roll, then sandwiched and pressure-bonded by nip rolls, and the pressure-bonded sheet is cooled by hugging them on a cooling roll. A method for producing a laminated sheet, which comprises curing and entirely welding the sheets to each other to continuously produce the laminated sheet. 3. The method according to claim 1, wherein the cut sheet and the continuous sheet are continuously laminated at an arbitrary fiber orientation of 45 to 135 degrees. 4. The thickness of the fiber reinforced thermoplastic resin sheet is 3
3. The production method according to claim 1 or 2, wherein the volume content of the reinforcing fibers is 0 μm or more and 500 μm or less, and the volume content of the reinforcing fibers is 30% or more and 85% or less. 5. The production method according to claim 1, wherein the reinforcing fiber is glass fiber or carbon fiber, and the thermoplastic resin is polypropylene-based, polystyrene-based or polyethylene-based resin. 6. A belt conveyor which is arranged immediately before the laminating section and which is traveling faster than the laminating speed,
The cut sheet passes through the gap with the floating prevention sheet placed above it, and by giving a speed difference between the preceding cut sheet and the subsequent cut sheet, the rear end surface of the preceding cut sheet and the subsequent cut sheet are cut. 3. The manufacturing method according to claim 1, wherein the front end surface of the sheet is continuously butted and continuously supplied to the laminating section. 7. The feeding shafts of the continuous sheets are moved in parallel so that the adjacent end faces of the continuous sheets running in parallel are separately detected and the end faces of the sheets coincide with an arbitrarily determined reference line. By aligning the adjacent sheet end faces of each continuous sheet, the position of one original sheet feeding shaft is fixed, and the sheet end faces of the continuous sheet fed from the other original sheet are abutted on the laminating section. The manufacturing method according to claim 2, wherein the continuous supply is performed. 8. When sandwiching two fiber-reinforced thermoplastic resin sheets from above and below with endless belts, the two fiber-reinforced thermoplastic resins supplied after passing through a butting portion capable of absorbing the shift amount of the preceding cut sheet. The resin sheet is held together with the belt on the heating roll, and the fiber reinforced thermoplastic resin sheet is heated and melted through the belt and then pressure-bonded. 3. The manufacturing method according to claim 1, wherein the laminated sheet of the fiber-reinforced thermoplastic resin sheet that has been welded is peeled off from the belt after cooling and curing the plastic resin sheet. 9. When the heated and melted fiber-reinforced thermoplastic resin sheet is cooled, the position of the straightening roll via the fiber-reinforced thermoplastic resin sheet sandwiched between the endless belts is moved along the cooling roll. 3. The method of manufacturing according to claim 1 or 2, wherein the holding angle to the cooling roll is changed to adjust the warp amount of the laminated sheet. 10. The position of the straightening roll is moved along the cooling roll by converting the rotation of the electric motor into the rotation of the straightening roll via a gear.
The manufacturing method as described. 11. A device for supplying a continuous web from above and below is provided in a preceding step of the laminating section, and the laminating section is provided with (upper web / cut sheet / continuous sheet), (upper web /
Cut sheet / continuous sheet / lower web), (cut sheet / continuous sheet / lower web), (upper or lower web / cut sheet) or (upper or lower web / continuous sheet) laminated constitution The manufacturing method according to claim 1 or 2, wherein the laminated sheet is continuously produced by supplying the laminated sheet. 12. A device for feeding a cut sheet, in which continuous fibers are aligned in one direction to form a sheet, and a fiber-reinforced thermoplastic resin sheet obtained by impregnating the aligned fiber sheet with a thermoplastic resin is cut to a fixed length and sent out. A cut sheet matching device that sequentially supplies the cut sheets to a matching device and aligns the cut end faces of the cut sheets without interruption, and a continuous sheet that is a fiber-reinforced thermoplastic resin sheet that runs in parallel with the cut sheet Feeding device or a continuous sheet feeding device that feeds the continuous sheets, which are multiple fiber-reinforced thermoplastic resin sheets that run in parallel with the cut sheet, while adjoining the adjacent end faces, and holds the cut sheet and the continuous sheet in a heating roll. By heating and welding, then nipping and crimping with nip rolls, Furthermore, a manufacturing apparatus for continuously manufacturing a laminated sheet, which comprises a laminating apparatus that cools and cures the pressure-bonded sheet by hugging it on a cooling roll. 13. The sheet material is sent to a certain length through a dancer roll and then cut at a cutting portion, and the cut sheet is sorted by a sorting conveyor on upper and lower two-stage tables as necessary, and a positioning roll is provided. 13. The manufacturing apparatus according to claim 12, which is a device for feeding a cut sheet, which is fed to a fixed position on a table by means of a feeding roll, and is then fed onto a belt conveyor by changing the traveling direction at an arbitrary angle of 45 to 135 degrees. . 14. A sheet cutting method, wherein the sheet ends of respective cut sheets are butted against each other due to the speed difference between the preceding cut sheet and the succeeding cut sheet, and the preceding cut sheet sent by a belt conveyor is nipped by a supply guide roll and sent. When the speed decreases, the rear end surface of the preceding cut sheet and the front end surface of the succeeding cut sheet are butted against each other, and if necessary, a cut sheet floating prevention sheet is placed on the butted portion top surface, and the cut sheet and the belt conveyor are loaded by their own weight. The positioning devices that position the preceding cut sheet and the succeeding cut sheet in the lateral direction on the front and side of the floating prevention sheet are placed on the left and right sides of the belt conveyor to improve the butt precision of the cut sheet A sheet butting device.
2. The manufacturing apparatus according to 2. 15. The continuous sheet A is placed between the continuous sheet web and the guide rolls, and the continuous sheet B is placed next to the continuous sheets A and B by an end face detector installed between the continuous sheet web and the guide rolls. The position of each end face is detected, and each feeding reel is slid in accordance with an arbitrary reference line to bring adjacent end faces close to each other, and further, the continuous sheet B
13. The manufacturing apparatus according to claim 12, which is a sheet aligning device that is moved to the continuous sheet B by the width-shifting guide and sends out the sheet end surface to the laminating section at intervals of 0 mm to 1 mm. 16. A plurality of heating rolls and cooling rolls, upper and lower endless belts and dancer rolls, respectively. The cut sheet, continuous sheets A and B, and upper and lower webs fed are sandwiched by upper and lower endless belts. The endless belt is held together with the heating roll and the upper and lower surfaces are heated in sequence,
Next, as in the case of heating, the upper and lower surfaces are sequentially cooled by being held by the cooling roll, and the straightening roll is moved along the circumference of the cooling roll to the cooling roll in the temperature range where the shape of the resin is fixed, and the holding angle is adjusted. The manufacturing apparatus according to claim 12, wherein the manufacturing apparatus is a laminating apparatus that corrects the warp of the laminated sheet in the vertical direction.