JP4557195B2 - Plastic foam laminated bent steel plate manufacturing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for manufacturing a resin foam laminated bent steel sheet in which a cross section is bent into a concave shape and a resin foam is laminated on the surface, and in particular, polyethylene foam (hereinafter abbreviated as “PEF” as appropriate). The present invention relates to an apparatus for producing a resin foam laminated folded steel sheet capable of selectively producing a PUF laminated folded steel sheet having a surface laminated with a PEF laminated folded steel sheet and a polyurethane foam (hereinafter abbreviated as “PUF” as appropriate).
[0002]
[Prior art]
As a folded steel sheet used for building materials, etc., as shown in FIG. 12, a PEF laminated folded steel sheet (hereinafter abbreviated as “PEF folded steel sheet”) 1 described in Japanese Patent Publication No. 8-1383, and As shown in FIG. 13, there is a PUF laminated folded steel sheet (hereinafter, abbreviated as “PUF folded steel sheet” as appropriate) 2. These bent steel plates 1 and 2 have a transverse cross section bent into a concave shape, and PEF 1a and PUF 2a for heat insulation purposes are laminated on the surface.
[0003]
In the PUF folded steel plate 2, the entire surface is a PUF laminated region, whereas in the PEF folded steel plate 1, there is no PEF between the predetermined lengths La and Lb from the respective longitudinal edges 1b and 1c to the inside. It is a lamination area, and a portion between the length Lc obtained by subtracting both predetermined lengths La and Lb from the total length L is the PEF lamination area. There is a difference in foam type and lamination form between the two folded steel plates 1 and 2, but both are used as roofing materials as a useful composite material. Although it is inferior, it is a low-cost product, and PUF bent steel sheet is expensive, but it is selected and used as a highly heat-insulating product according to its application and purpose.
[0004]
[Problems to be solved by the invention]
However, in the case of the two types of bent steel plates 1 and 2, there is a problem that it is difficult to manufacture efficiently.
[0005]
That is, since there is a remarkable difference in the manufacturing method between the steel plates 1 and 2, both types must be produced by separate manufacturing facilities. In the case of the PEF bent steel sheet 1, since it is necessary to stick it to a flat plate, a PEF is laminated on a plate-shaped steel sheet obtained by cutting a strip-shaped flat steel sheet into a predetermined length, and then a bending process is performed. On the other hand, in the case of the PUF folded steel plate 2, it is possible to construct a PUF layer on the folded steel plate, and when the plate is constructed and bent, a crack may occur in the PUF layer. A production method is adopted in which the strip-shaped flat steel plate is bent without being cut, and then is further cut after being laminated with PUF on the surface.
[0006]
In addition, in the case of manufacturing the PEF folded steel sheet 1, in addition, it is often the case that the local bending process of bending only the PEF non-laminated region is not successful. Since the PEF non-laminated area has a greater restoring force in the width direction than the PEF laminated area, a local folding process is separately provided in the latter half of the folding process to stop the widthwise expansion at both ends. A PEF bent steel sheet 1 having a uniform width is obtained. However, local bending is not always successful.
[0007]
In the case of the manufacturing method of Japanese Patent Publication No. 8-1383, a thickness sensor such as a limit switch senses a PEF non-laminated area on the surface of a steel sheet based on a thickness difference due to the presence or absence of PEF lamination, Performs strong bending of the roll, and the local bending process is performed without applying strong roll pressing to the PEF lamination region. However, setting a thickness sensor such as a limit switch so that it does not malfunction, such as when the thickness of the PEF is thin, is not easy and often does not work. When stacking PEFs with greatly different thicknesses, The position needs to be adjusted, and the manufacturing method disclosed in Japanese Patent Publication No. 8-1383 still has room for improvement in order to efficiently manufacture the PEF folded steel sheet 1.
[0008]
Then, the objective of this invention makes it a subject to provide the manufacturing apparatus of the resin foam lamination | stacking bending steel plate which can manufacture a PEF bending steel plate and a PUF bending steel plate efficiently.
[0009]
[Means for Solving the Problems]
The above object can be achieved by the invention described in the claims. That is, the characteristic configuration of the resin foam laminated folded steel sheet manufacturing apparatus according to the present invention includes a PEF laminated folded steel sheet having a polyethylene foam (PEF) laminated on the surface and a PUF laminated folded steel sheet having a polyurethane foam (PUF) laminated on the surface. And a resin foam laminated folded steel sheet manufacturing apparatus that can be selectively manufactured,
The PEF laminated folded steel sheet is manufactured by sticking PEF after cutting the steel sheet, and then bending, and the PUF laminated folded steel sheet is manufactured by folding the continuous steel sheet, then stacking the PUF, and then cutting. Is selectable as
A strip-shaped steel sheet supply means for continuously feeding a long strip-shaped steel sheet; a first steel sheet cutting means for cutting and feeding the fed steel sheet into a steel sheet having a predetermined length; and PEF laminating means for laminating and laminating a PEF sheet on the surface, first folding means for subjecting the steel sheet to a concave cross section, and a steel sheet that has been folded by the first folding means, again with a concave concave section. A second bending means for performing bending, a PUF laminating means for continuously laminating PUF on the surface of the uncut bent strip steel plate being conveyed, and a PUF laminated uncut strip steel plate for a predetermined Dimension data for providing a PEF non-laminated area for a predetermined length from the longitudinal direction edge of the steel sheet sheet to the inside thereof, as well as each means with the second steel sheet cutting means for cutting into dimensions. Dimension data setting means to set PEF adhesion control means for causing the PEF lamination means to adhere the PEF sheet so that a predetermined length of PEF non-lamination areas are generated at both ends in the longitudinal direction of the steel sheet based on the dimension data of the data setting means, and PEF lamination A sheet tip detection means for detecting the arrival of the leading edge of the finished steel sheet, a second bend for the PEF laminated steel sheet based on the sheet tip detection signal by the sheet tip detection means and the dimension data by the dimension data setting means. Bending control means for controlling the second bending means is disposed so that the bending process by the means is substantially performed only on the non-PEF laminated area, and the PEF laminated folded steel sheet is produced. The PUF laminating process by the PUF laminating means and the steel sheet cutting process by the second steel sheet cutting means are removed from the production line, and the PUF laminated folded steel sheet is manufactured. The time of is that the PEF laminating process by steel severing and PEF laminating means according to the first steel plate cutting means is configured to be removed from the production line.
[0010]
In the apparatus of the present invention configured as described above, when manufacturing a PEF laminated folded steel sheet, the PUF lamination process by the PUF lamination means and the steel sheet cutting process by the second steel sheet cutting means are removed from the production line. After the long strip-shaped steel plate is cut into a steel plate sheet having a predetermined length, the steel plate sheet is made to be a PEF non-laminated region for a predetermined length from the longitudinal edge of the steel plate sheet to the inside. A PEF sheet is laminated to the PEF sheet, and then a concave bending process is performed, followed by a local bending process in which only a PEF non-laminated area is bent, and PEF laminated folding is performed. Bending steel plates can be manufactured one after another.
[0011]
In addition, the identification of the PEF non-laminated area and the PEF laminated area necessary for the local bending process to the PEF non-laminated area when manufacturing the PEF laminated folded steel sheet is an error of a slight thickness difference due to the presence or absence of PEF lamination. Not based on information that is likely to occur, but based on sheet tip detection that detects only the arrival of the leading edge of a PEF-laminated steel sheet sheet, and information that does not cause an error such as a preset dimension for a PEF non-laminated area of a predetermined length. Therefore, the local bending process for the PEF non-laminated area is always performed well.
[0012]
Moreover, in the apparatus of the present invention described above, when manufacturing the PUF laminated bent steel sheet, the steel sheet cutting process by the first steel sheet cutting means and the PEF lamination process by the PEF laminating means are removed from the production line, and by other means, Continuously supplied long strip steel sheets are subjected to bending processing with a concave cross section without cutting, and then cut individually after the PEFs are laminated, and PUF laminated bent steel sheets can be manufactured one after another. is there. At this time, the second bending means is set not to operate.
[0013]
That is, in the apparatus of the present invention, both the PEF laminated folded steel sheet production line and the PUF laminated folded steel sheet production line can be selectively switched and set in the same apparatus, and the local area with respect to the non-PEF laminated area. Therefore, according to the resin foam laminated folded steel sheet manufacturing apparatus of the present invention (hereinafter abbreviated as “bending steel sheet manufacturing apparatus” as appropriate), the PEF bent steel sheet and the PUF are used. A bent steel sheet can be manufactured efficiently.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram illustrating an overall configuration of a bent steel sheet manufacturing apparatus according to an embodiment.
[0015]
In the folded steel plate manufacturing apparatus S of the embodiment, as shown in FIG. 1, a strip-shaped steel plate supply unit 3 that continuously feeds a long strip-shaped (flat) steel plate and a steel plate cut into a steel sheet having a predetermined length. The first steel sheet cutting section 4 to be sent out, the PEF laminated section 5 for laminating and laminating a PEF sheet on the surface of the steel sheet, the first folding section 6 for bending the steel sheet into a concave section, and the first folding A second bent portion 7 for again bending the steel plate that has been bent by the bent portion 6 and a PUF stack for continuously stacking PUF on the surface of the uncut bent strip-shaped steel plate. The part 8 and the second steel sheet cutting part 9 for cutting the PUF laminated uncut strip steel sheet into a predetermined dimension are arranged in the above order.
[0016]
Furthermore, in the bent steel sheet manufacturing apparatus S of the embodiment, the first sheet leading edge detection unit 10 that detects the arrival of the leading edge of the steel sheet provided for the PEF lamination cut to a predetermined length by the first steel sheet cutting unit 4, and the steel sheet sheet A dimension data setting unit 11 for setting dimension data for setting a PEF non-stacked area between a predetermined length from the longitudinal edge to the inside of the sheet, dimension data, and a detection signal of the first sheet leading edge detection unit 10 Of the PEF lamination control section 12 for attaching the PEF sheet to the PEF lamination section 5 so that a PEF non-lamination area having a predetermined length is generated at each end in the longitudinal direction of the steel sheet, and the PEF lamination steel sheet sheet Based on the detection signal of the sheet leading edge detection unit 13 and the dimension data of the data setting unit 11, the second sheet leading edge detection unit 13 for detecting the arrival of the leading edge is applied to the second bending unit 7 for the PEF laminated steel sheet. And a bending control unit 14 for controlling the second bent portion 7 so that the bending process is substantially performed only on the non-PEF laminated region, and the PEF bent steel sheet 1 is manufactured. At the time, the PUF lamination process by the PUF lamination part 8 and the steel sheet cutting process by the second steel sheet cutting part 9 are removed from the production line, and the steel sheet cutting process by the first steel sheet cutting part 4 and the In addition to a line selection control unit 15 for removing the PEF stacking process by the PEF stacking unit 5 from the production line, an operation console 16 is provided for inputting a numerical value necessary for selecting and specifying the manufacturing line and dimension data. ing.
[0017]
In addition, although illustration is abbreviate | omitted, it cannot be overemphasized that the known conveyance mechanism etc. which send the member in the middle of each manufacture of a steel plate sheet | seat ahead are also arrange | positioned in the appropriate place. Hereinafter, the structure of each part is demonstrated concretely.
[0018]
The strip steel plate supply unit 3 is configured to pull out and feed a steel plate from a steel plate roll on which uncut (flat) strip steel plates are wound several times. The first steel plate cutting part 4 performs the steel plate cutting process only when the PEF bent steel plate 1 is manufactured. As shown in FIG. 2, the strip steel plate has the same length as the length L of the PEF bent steel plate 1. It is comprised so that it may cut | disconnect to the steel sheet 1A of length L one after another.
[0019]
The PEF lamination part 5 also performs the PEF lamination process only when the PEF bent steel sheet 1 is manufactured. As shown in FIG. 3, the PEF laminated part 5 has the same width as the PEF bent steel sheet 1 and the PEF lamination area. The PEF sheet 1 </ b> B having the same length Lc as the length Lc is adhered to the steel sheet 1 </ b> A according to the control of the PEF adhesion control unit 12.
[0020]
The PEF sticking control unit 12 controls the PEF stacking unit 5 based on the detection signal of the first sheet leading edge detection unit 10 and the dimension data of the data setting unit 11. That is, the dimension data setting unit 11 includes necessary dimension data such as the lengths La and Lb of the PEF non-laminated areas in the steel sheet 1A, the length Lc of the PEF laminated areas, and the entire length L of the steel sheet 1A. It is set in advance by numerical input from the operation unit 16 or the like. On the other hand, the first sheet leading edge detector 10 detects the leading edge of the steel sheet 1A and outputs a detection signal. Therefore, the PEF sticking control unit 12 calculates the position where the PEF sheet 1B is pasted on the steel sheet 1A from the dimension data, and the tip position of the steel sheet 1A based on the detection signal of the first sheet tip detecting unit 10, as shown in FIG. As shown, controlling the PEF lamination part 5 so that the PEF sheet 1B is adhered to the steel sheet 1A so that the leading edge of the PEF sheet 1B is located at a position backward by a length La from the leading edge of the steel sheet 1A. become.
[0021]
As shown in FIG. 1, the 1st bending part 6 is equipped with the seven roll units 6A installed along the steel plate advancing direction, and the structure which performs the bending process which makes a steel plate a cross-sectional concave shape with the roll unit 6A, It has become. Each roll unit 6A of the first bent portion 6 has a configuration as shown in FIG. 5, for example, although there is a slight difference in roll diameter between the units. That is, the upper and lower pressure rolls 6a and 6b for forming the concave center part are arranged so as to be positioned in the middle in the width direction of the steel sheet 1A, and the upper and lower pressure rolls 6c and 6d for forming the side parts are formed on the steel sheet 1A. They are arranged so as to be positioned in the vicinity of the left and right side edges in the width direction. The pressure rolls 6b and 6c gradually increase in diameter along the steel plate traveling direction, and conversely, the pressure rolls 6a and 6d gradually decrease in diameter along the steel plate traveling direction. It is done without difficulty.
[0022]
In the case of the first bent portion 6, the rotary shaft 6f for the pressure rolls 6b and 6d is a drive shaft that is forcibly rotated by a drive motor (not shown) of the roll drive portion 6B, and the pressure rolls 6a and 6c. The rotary shaft 6e is a driven shaft, and all the pressure rolls 6a to 6d are rotated as the rotary shaft 6f is driven to rotate, and the steel sheet is bent while moving forward. Moreover, since the rotation amount of the pressure rolls 6a to 6d is proportional to the moving distance of the steel plate and is proportional to the rotation amount of the pressure rolls 6a to 6d and the rotation amount of the drive motor, the roll driving unit 6B is A pulse signal is input from the encoder of the drive motor to detect the rotation amount of the drive motor, and this is sent to the bending control unit 14 as a steel plate movement distance measurement signal.
[0023]
As shown in FIG. 1, the 2nd bending part 7 is equipped with the two roll units 7A installed along the steel plate advancing direction, and the structure which gives again the bending process which makes a steel plate a cross-sectional concave shape with 7 A of roll units. It has become. Each roll unit 7A of the 2nd bending part 7 has a structure as shown, for example in FIG. That is, the upper and lower pressure rolls 7a and 7b for forming the concave center portion are arranged so as to be positioned in the middle in the width direction of the steel sheet, and the upper and lower pressure rolls 7c and 7d for forming the side portions are left and right in the width direction of the steel sheet. It arrange | positions so that it may each be located in the side edge vicinity. Since the pressure roll 7b has a grooveless shape and the inner outer edge of the pressure roll 7b has a grooveless shape, a feature of the roll unit 7A is that strong pressure can be applied to the concave bottom. The rotating shaft 7g is a driving shaft that is forcibly rotated by a drive motor (not shown) of the roll driving unit 7B, the rotating shafts 7e and 7f are driven shafts, and are fully added as the rotating shaft 7g is rotationally driven. The pressure rolls 7a to 7d rotate and the steel plate is bent while moving forward.
[0024]
Further, as shown by the alternate long and short dash line in the right part of FIG. 7, the second bent portion 7 is strong against the passing steel plate by lifting the upper rollers 7a and 7c slightly by the operation of the air cylinder 7B. It is configured so that it is possible to stop the pressurization. Therefore, when the bending object is the PEF laminated steel sheet 1A, the bending control unit 14 detects the arrival of the leading edge of the PEF laminated steel sheet 1A as shown in FIG. After receiving the detection signal of the section 13, based on the moving distance measurement signal of the steel sheet from the roll driving section 6B, the front end of the steel sheet 1A is the length between the second sheet front end detection section 13 and the preceding roll unit 7A. An opening signal is sent to the solenoid valve 7C when it is detected that the head has moved forward from the position of the second sheet leading edge detector 13 by a distance obtained by adding the length La of the PEF non-stacked area based on the dimension data of the data setting unit 11 to the length Lo. The air cylinder 7B is operated to stop the strong pressurization to the steel plate 1A.
[0025]
Furthermore, the bending control unit 14 then detects that the steel sheet 1A has advanced by the length Lc of the PEF non-laminated area based on the moving distance measurement signal of the steel sheet from the roll driving unit 6B. A close signal is sent to stop the operation of the air cylinder 7B, and strong pressurization is again applied to the steel sheet 1A. Therefore, the PEF is not damaged in the PEF laminated area of the steel sheet 1A, so that the PEF is not damaged, and the strong pressure is applied to the steel sheet 1A in the non-PEF laminated area of the steel sheet 1A. As a result of the tight opening of the bent steel sheet 1 in the width direction of the PEF non-laminated region, the width dimension in the longitudinal direction is uniform.
[0026]
In the case of the PUF bent steel sheet 2, the bending control unit 14 always sends a closing signal to the electromagnetic valve 7 </ b> C, stops the operation of the air cylinder 7 </ b> B, and continuously applies strong pressure to the steel sheet. However, in the case of the PUF bent steel sheet 2, the air cylinder 7B may always be operated as necessary to reverse the powerful pressurization to the steel sheet completely.
[0027]
The PUF lamination part 8 is configured to continuously laminate the PUF by spraying a PUF foaming stock composition on the surface of an uncut bent strip-shaped steel sheet. Moreover, the 2nd steel plate cutting part 9 is the structure which cut | disconnects the uncut cutting strip steel plate of PUF lamination | stacking to the predetermined dimension according to the length of the product dimension of the PUF bending steel plate 2. FIG.
[0028]
The line selection control unit 15, when the PEF bent steel sheet 1 is designated as a manufacturing item by the operation unit 16, stops the PUF lamination process by the PUF lamination part 8 and the steel sheet cutting process by the second steel sheet cutting part 9. Start. According to the flow shown in the flowchart of FIG. 10, the PEF bent steel sheet 1 shown in FIG. 12 is obtained one after another.
In this case, as shown in FIG. 8, in the first and second bent portions, the steel sheet 1A is bent.
[0029]
In addition, when the PUF bent steel sheet 2 is designated as a manufacturing item by the operation unit 16, the line selection control unit 15 stops the steel sheet cutting process by the first cutting unit 4 and the PEF stacking process by the PEF stacking unit 5. Start manufacturing. According to the flow shown in the flowchart of FIG. 11, the PUF bent steel sheet 2 shown in FIG. 13 is obtained one after another. In this case, as shown in FIG. 9, in the first and second bent portions, the uncut band-shaped steel plate CA is bent.
[0030]
[Another embodiment]
(1) In the embodiment apparatus, the second sheet leading end detection unit 13 is provided in front of the entrance of the first folding unit 6, but the second sheet leading end detection unit 13 is disposed immediately before the first folding unit 6. It may be provided.
[0031]
(2) The structure of the 1st bending part 6 is not restricted to an Example, The roll unit for finish molding etc. of the structure similar to the roll unit 7A in the 1st bending part 6 is installed in the tail side. Also good.
[0032]
(3) In the embodiment, the bending process is completed at the second bending part 7, but after the second bending part 7, the bending process by a roll unit for finish molding or the like is further performed. It may be a simple configuration.
[0033]
(4) Although the apparatus of an Example was the structure which manufactures the bending steel plate in which the concave shape of a cross section is one, this invention is an apparatus structure which manufactures the bending steel plate in which the concave shape of a cross section has two or more in the width direction. It may be.
[0034]
(5) Polyethylene foam or polyurethane foam laminated on the surface of the steel sheet can be used without limitation as long as it has a heat insulating effect. As the PUF, a rigid foam is usually used.
[0035]
(6) When switching the production line, the PUF lamination process and the steel sheet cutting process by the second steel sheet cutting part are removed from the production line, or the steel sheet cutting process and the PEF lamination process by the first steel sheet cutting part are removed from the production line. The configuration may be automatically performed, or a configuration in which part or all of the configuration is manually performed may be used.
[0036]
(7) It is also preferable that the cutting machine that constitutes the first steel sheet cutting part is configured to be movable, and that the cutting machine that constitutes the second steel sheet cutting part can also be used.
[0037]
The PUF lamination treatment is performed by applying the hard polyurethane foam foam concentrate solution to a folded steel plate that has been folded into a predetermined shape by the first folding means.
The hard polyurethane foam foam stock solution composition is applied by mixing a two-component reaction curing type hard polyurethane foam foam stock solution with a known foaming machine. Examples of the application method include, but are not limited to, a spray method and a casting method. As the rigid polyurethane foam foaming stock solution, it is convenient to use a commercially available stock solution, such as Soflan R stock solution (manufactured by Toyo Tire & Rubber Co., Ltd.), and a stock solution having properties according to the purpose is selectively used.
[0038]
In the present invention, the thicknesses of the PEF and PUF layers which are heat insulating layers are not particularly limited, and are appropriately set according to required heat insulating properties and the like, but are preferably about 1 to 10 mm.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the overall configuration of a production apparatus for resin foam laminated bent steel sheets of an embodiment. FIG. 2 is a plan view showing a steel sheet produced in the course of production by the apparatus of the embodiments. FIG. 4 is a plan view showing a laminated state of a steel sheet and a PEF sheet. FIG. 5 is a schematic view showing an arrangement state of pressure rolls of the roll unit 6A of the embodiment apparatus. Side view [FIG. 6] Schematic side view showing the arrangement state of the pressure rolls of the roll unit 7A of the embodiment apparatus. [FIG. 7] Schematic front view for explaining the configuration and operation of the folding part of the embodiment apparatus. 8] Schematic front view showing the situation of the bent portion during manufacture of the PEF bent steel sheet in the embodiment. [FIG. 9] Schematic front view showing the situation of the bent portion during manufacture of the PUF bent steel plate in the embodiment. 10] PEF by Example Equipment Flowchart showing the flow of manufacturing a folded steel plate [FIG. 11] Flowchart showing the flow of manufacturing a PUF folded steel plate by the apparatus of the embodiment [FIG. 12] FIG. 13 is an external perspective view showing an example of a PEF folded steel plate. Appearance perspective view showing an example
DESCRIPTION OF SYMBOLS S ... Production apparatus 1 of resin foam lamination | stacking bending steel plate 1 ... PEF bending steel plate 1a ... PEF
DESCRIPTION OF SYMBOLS 1A ... Steel plate sheet 1B ... PEF sheet 2 ... PUF bending steel plate 2a ... PUF
DESCRIPTION OF SYMBOLS 3 ... Strip | belt-shaped steel plate supply part 4 ... 1st steel plate cutting part 5 ... PEF lamination | stacking part 6 ... 1st bending part 7 ... 2nd bending part 8 ... PUF lamination | stacking part 9 ... 2nd steel plate cutting part 11 ... Dimension data setting part DESCRIPTION OF SYMBOLS 12 ... PEF sticking control part 13 ... 2nd sheet front-end | tip detection part 14 ... 2nd bending control part 15 ... Line selection control part

Claims (1)

An apparatus for producing a resin foam laminated folded steel sheet capable of selectively producing a polyethylene foam laminated folded steel sheet having a polyethylene foam laminated on the surface and a polyurethane foam laminated folded steel sheet having a polyurethane foam laminated on the surface,
The polyethylene foam laminated folded steel sheet is manufactured by pasting and then folding polyethylene foam after cutting the steel sheet, and the polyurethane foam laminated folded steel sheet is formed by laminating polyurethane foam after bending continuous steel sheet and then cutting. Can be selected to manufacture,
A strip-shaped steel sheet supply means for continuously feeding a long strip-shaped steel sheet, a first steel sheet cutting means for cutting and feeding the fed steel sheet into a steel sheet of a predetermined length, and a transported steel sheet sheet Polyethylene foam laminating means for laminating and laminating a polyethylene foam sheet on the surface, first folding means for subjecting the steel sheet to bending with a concave cross section, and a steel sheet that has been bent by the first folding means again with a concave cross section. 2nd bending means for performing the bending process, polyurethane foam laminating means for continuously laminating polyurethane foam on the surface of the uncut folded strip-shaped steel sheet being conveyed, and polyurethane foam laminated uncut While each means with the 2nd steel plate cutting means which cuts a strip shaped steel plate to a predetermined size is arranged, between the predetermined length from the longitudinal direction edge of a steel plate sheet to the inside Dimension data setting means for setting dimension data for making a polyethylene foam non-laminated area, and a polyethylene foam non-laminated area having a predetermined length are generated at both ends in the longitudinal direction of the steel sheet based on the dimension data of the dimension data setting means. Polyethylene foam sticking control means for making the polyethylene foam sheet stick to the polyethylene foam laminating means, sheet leading edge detecting means for detecting the arrival of the leading edge of the steel sheet sheet laminated with polyethylene foam, and sheet leading edge detection means by the sheet leading edge detecting means On the basis of the signal and the dimension data set by the dimension data setting means, the steel sheet laminated with polyethylene foam is subjected to the folding process by the second folding means so as to be substantially applied only to the polyethylene foam non-laminated area. Bending control means for controlling 2 folding means is provided In addition, when producing polyethylene foam laminated folded steel sheets, polyurethane foam lamination treatment by polyurethane foam lamination means and steel sheet cutting treatment by second steel sheet cutting means are removed from the production line, and polyurethane foam lamination bending is performed. In the production of the steel sheet, the resin foam laminated folded steel sheet is configured such that the steel sheet cutting treatment by the first steel plate cutting means and the polyethylene foam lamination treatment by the polyethylene foam lamination means are removed from the production line. Manufacturing equipment.

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