JP2018159226A - Method for manufacturing metal sheet for metal siding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal sheet for metal siding, which reduces twisting and warping which occurs in a metal plate without applying a tension even in the case of forming a deep pattern or joint of irregularities.SOLUTION: A method for manufacturing a metal siding metal plate 1 comprising a fitting portion 10, a longitudinal joint member 21 and a handle portion 20 having predetermined patterns 22, 23, has an embossing step in which, by means of embossing roll forming, undulation preventing shank 11 is formed at both end portions 10' in the width direction, which become engaging portions 10, of metal original plate 1' having a predetermined width, and both widthwise end portions 10' of metal original plate 1' forming embossed patterns 22 and 23 on the inner side of both widthwise end portions 10' of the metal original plate 1', and a groove forming step of forming the longitudinal joints 21 inside the widthwise opposite end portions 10 'of the metal original plate 1' after the emboss forming step.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method of manufacturing a metal plate for metal siding used for an outer wall of a building.

Conventionally, metal siding having durability, lightness, waterproofness, heat insulation and the like has been used as an outer wall material of a building.
Metal siding consists of a core material such as foamed polyurethane that is rectangular and functions as a heat insulating material and a sound deadening material, a metal plate that covers the surface of the core material, and a sheet-like back material that covers the back surface of the core material. Composed.

  The metal plate used for such metal siding usually has various uneven shapes at the center in the width direction by embossing a metal strip as an original plate with a molding die such as an embossing roll or a press die. A pattern portion having a pattern or the like is formed. Moreover, when attaching a metal siding to the outer wall etc. of a building, since it is necessary to connect several metal siding, the fitting part is formed in the both ends of the width direction of a metal plate.

  In recent years, metal siding is required to have a higher level of quality and profound feeling, and the design has been advanced. Along with this, it is desired to form deep joints of the handle portion of the metal plate constituting the metal siding. As described above, the metal plate used for metal siding has a handle portion at the center and fitting portions at both ends in the width direction. Therefore, embossing gives the handle only to the central part of the metal strip, but because the part that becomes the fitting part at both ends remains flat, both ends are longer than the handle that shrinks in the longitudinal direction. It becomes a wavy shape. When such metal strips are used to form metal siding, a wavy shape remains in the appearance, and the design properties deteriorate. Moreover, when a metal strip with both ends undulated is formed by roll forming to form a fitting portion, there are problems such as wrinkling, twisting, and warping of the metal plate.

Therefore, in Patent Document 1, by providing a pattern for preventing undulation composed of a large number of small irregularities at both ends in the width direction of the metal strip that becomes the fitting portion, the processing portion is balanced with the processing distortion of the pattern portion. Methods have been proposed to prevent distortion.
Moreover, in patent document 2, in order to restrain material flowing into a handle | steering-piece part from the width direction both ends of the metal strip used as a fitting part at the time of embossing, the width direction both ends and handle | pattern part of a metal strip A method of providing a material inflow prevention groove over the entire length in the longitudinal direction is proposed.

  In the methods described in Patent Documents 1 and 2, the handle portion, the wavy pattern, the material inflow preventing groove, and the like are formed by one embossing. However, in Patent Document 3, the preliminary embossing machine and the main embossing are formed. There has been proposed a method of forming a pattern portion by dividing embossing into two stages using two embossing machines of a molding machine. Processed to the depth of 0.2 to 0.6 times the predetermined depth in the longitudinal joint and the width joint in the first stage pre-embossing, and processed to the predetermined depth in the second stage embossing. By doing so, it is possible to form joints having a depth of 1.0 to 1.3 mm without causing distortion.

  Moreover, in patent document 4, by using two embossing machines, the feed rate of the metal strip of a preliminary | backup embossing machine is slowed with respect to this embossing machine, and it is made into the material shape | molded with this embossing machine. A method has been proposed in which a joint having a depth of 3 to 8 mm is formed without wrinkling, twisting, warping or the like of a metal plate by applying tension from the upstream side and adjusting the amount of material drawn.

JP-A-11-240294 JP 2014-173247 A Japanese Patent Laid-Open No. 11-20398 JP 2004-330577 A

Even with the methods described in Patent Documents 1 to 3, if a pattern or joint having a deeper unevenness, which has been required in recent years, is formed, the metal plate is twisted or warped.
In addition, according to the method described in Patent Document 4, it is possible to form a pattern or joint having a deeper unevenness than the methods described in Patent Documents 1 to 3, but an original plate having high strength such as a steel plate is used. When processing, it is necessary to apply a large tension, which leads to an increase in the cost of the embossing machine. Moreover, when using the steel plate by which plating and coating were performed, when embossing is performed while applying tension | tensile_strength, a crack and a crack may generate | occur | produce in a plating layer or a coating-film layer, and there exists a possibility that corrosion resistance may fall.

  Therefore, the present invention provides a method for manufacturing a metal plate for metal siding that can reduce twisting and warping generated in a metal plate without applying a tension even when a deeply uneven pattern or joint is formed. Objective.

  The present invention is for metal siding having a predetermined width and including fitting portions provided on both sides in the width direction for connection in the width direction, and a handle portion provided on the inner side in the width direction than the fitting portion. A method of manufacturing a metal plate, wherein the handle portion includes a longitudinal joint composed of a plurality of grooves formed over the entire length in the longitudinal direction, and a predetermined handle, and has a predetermined width by emboss roll forming. The embossing step of forming the predetermined pattern on the inner side of the both ends in the width direction of the metal original plate, and forming a pattern for preventing undulation at both ends in the width direction serving as the fitting portion of the metal original plate having, It is related with the manufacturing method of the metal plate for metal siding including the groove | channel formation process of forming the said longitudinal direction joint inside the said width direction both ends of the said metal original plate after an emboss formation process.

  Further, it is preferable that the predetermined pattern includes a pattern formed with predetermined unevenness.

  Moreover, it is preferable that the said pattern is formed in the said emboss formation process in the area | region where the said longitudinal joint is formed in the said groove formation process.

  Moreover, it is preferable that the depth of the pattern is shallower than the depth of the joint in the longitudinal direction.

  Moreover, it is preferable that the predetermined handle includes a width direction joint composed of a plurality of grooves along the width direction.

  Moreover, it is preferable that the width direction joint is extended to both sides in the width direction in the emboss formation step in a region where the longitudinal direction joint is formed in the groove forming step.

  Moreover, it is preferable that the depth of the said width direction joint is shallower than the depth of the said longitudinal direction joint.

  Moreover, it is preferable that the said metal original plate is a steel plate.

  Moreover, it is preferable that the said steel plate is a plated steel plate.

  Moreover, it is preferable that the said steel plate is a coated steel plate.

  According to the manufacturing method of the present invention, the metal plate is uniformly shrunk in the longitudinal direction by forming the pattern for preventing undulation and the handle other than the joint in the longitudinal direction in the embossing process, and then forming the groove. A metal plate for metal siding in which twisting and warpage are reduced can be obtained by forming a joint in the longitudinal direction with little influence of the metal original plate shrinking in the longitudinal direction in the process.

It is a figure which shows one Embodiment of the metal plate for metal siding manufactured by the manufacturing method which concerns on this invention. It is a schematic explanatory drawing which shows an example of the manufacturing method which concerns on this invention. In FIG. 2, it is a figure which shows the shape of the metal original plate in the AA cross section and the metal original plate embossed through the embossing roll. In FIG. 2, it is a figure which shows the shape of the metal original plate surface in the BB cross section and the metal original plate in which the longitudinal direction joint was formed through the groove | channel formation roll. In an Example, it is a figure which shows the measurement location of the amount of shrinkage | contraction in a longitudinal direction.

  In recent years, metal siding has been required to have a concavo-convex pattern that is deep (with a large difference in height) with the increase in design, and the shrinkage in the longitudinal direction in the width direction can also be achieved by employing the anti-corrugation pattern described in Patent Document 1 above. The amount of unevenness cannot be reduced sufficiently.

  Moreover, the length of a longitudinal direction is made uniform in the width direction by putting the groove | channel extended over the full length of a longitudinal direction in the boundary of the both ends of a metal plate in which the fitting part of patent document 2, and a handle part are formed. Even with this method, the length between the grooves constituting the longitudinal joint cannot be made equal to the length in the longitudinal direction of the groove constituting the longitudinal joint of the handle portion.

  Furthermore, after preliminarily forming a groove serving as a joint in the longitudinal direction using a preliminary embossing machine described in Patent Document 4, a technique for providing a deep groove by embossing with this embossing machine while applying a tension is used. In such a case, even if the length of the metal plate is uniform in the width direction, the coating film is cracked.

  In the one-step embossing process, the inventors of the present invention have a difference in the length in the longitudinal direction between the both ends of the handle portion in the width direction in which the material of the metal original plate easily flows and the center portion where there is no material inflow. It was predicted that torsion and warpage would occur in the finished metal plate. Further, in the two-stage embossing, the groove constituting the widthwise joint processed by the second-stage embossing roll with respect to the length in the longitudinal direction of the groove constituting the longitudinal joint given in the first stage; It was predicted that the length in the longitudinal direction shrunk by the pattern processing on the surface pattern portion did not match.

  Furthermore, the reason why the coating film breaks in the two-stage molding is that the corner portion where the longitudinal joint and the transverse joint intersect with each other is formed by overhang molding by molding the width joint with the embossing roll as the latter stage while applying tension. It was predicted that the coating would crack.

  Therefore, the present inventors form deep joints in the longitudinal direction while preventing cracking of the coating film, so the joints and patterns in the width direction are formed with an embossing roll without applying a tension, and the latter forming machine is used. Invented a method of forming a longitudinal joint extending over the entire length in the longitudinal direction.

A metal plate for metal siding and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.
In this specification, the process which gives uneven | corrugated patterns, such as a joint and a pattern, to a metal original plate surface is called embossing, and the roll for attaching an uneven | corrugated pattern is called an embossing roll. The embossing roll can transfer the concavo-convex pattern by sandwiching and lowering the metal original plate with a pair of upper and lower sides.

As an example, a metal plate 1 for metal siding (hereinafter referred to as a metal plate 1) according to this embodiment includes a metal base plate 1 'such as a metal strip having a predetermined width, an embossing roll 100 and a groove shown in FIG. After being molded by the molding machine 110, it is obtained by performing a predetermined process for forming a fitting portion described later. As shown in FIG. 1, the metal plate 1 has a predetermined width, the fitting portions 10 are provided on both sides in the width direction, and the handle portion 20 is provided on the inner side in the width direction than the fitting portions 10.
The material of the metal original plate 1 ′ that is the original plate of the metal plate 1 is not particularly limited. For example, an aluminum alloy plate may be used, but it is preferable to use a steel plate having higher strength than the aluminum alloy plate. In consideration of durability against wind and rain, it is preferable to use a plated steel plate or a coated steel plate having corrosion resistance. In the present specification, the metal plate 1 means a metal plate in a state where at least the fitting portion 10 is formed after the wavy pattern 11 or the pattern portion 20 is formed. Further, the metal original plate 1 ′ means a metal plate in a state before the fitting portion 10 is formed.

The fitting portion 10 is provided to connect a plurality of metal sidings in the width direction, and a male-female fitting structure is obtained by bending the width direction both ends 10 'of the metal original plate 1'. It is formed. For example, the metal siding can be connected by forming one side as a convex portion and the other side as a concave portion and fitting them together.
Moreover, before performing the bending process of the fitting part 10, the embossing is given inside the width direction both ends 10 'of metal original plate 1', and the pattern part 20 is formed. At this time, the undulation preventing pattern 11 is formed by the embossing roll 100 in order to shrink the widthwise both ends 10 ′ of the metal original plate 1 ′ in the longitudinal direction to be equal to the pattern portion 20. The undulation preventing pattern 11 may be any pattern as long as it can contract in the longitudinal direction. In the present embodiment, the undulation preventing pattern 11 is constituted by a wave pattern formed by a concave portion and a convex portion along the width direction as an example. The Thereby, since generation | occurrence | production of the corrugation of the width direction both ends 10 'of metal original plate 1' can be suppressed, the bending process of the fitting part 10 can be performed favorably and generation | occurrence | production of the twist and curvature of the metal plate 1 can be reduced. .

  The handle portion 20 is provided over the entire inner surface of the width direction both end portions 10 ′ where the fitting portion 10 is provided in the metal plate 1, a longitudinal joint 21, a pattern 22 and a width joint 23 as predetermined patterns, It is comprised including. In this embodiment, although the structure containing both the pattern 22 and the width direction joint 23 was shown as a predetermined pattern, you may be comprised only in one of the pattern 22 and the width direction joint 23. FIG.

The pattern 22 is constituted by minute unevenness, and the depth of the unevenness is shallower than the depth of the longitudinal joint and the width joint and is formed by the embossing roll 100.
The width direction joint 23 is composed of a plurality of grooves along the width direction, and is formed by the embossing roll 100.
The longitudinal joint 21 is constituted by a plurality of grooves extending over the entire length in the longitudinal direction, and the depth thereof is deeper than the depth of the width joint 23 and is formed by the groove forming machine 110.

  Next, a method for manufacturing the metal plate 1 according to this embodiment will be described. The method for manufacturing the metal plate 1 includes an embossing process using the embossing roll 100 and a groove forming process for forming a groove that becomes the longitudinal joint 21 after the embossing process.

<Embossing process>
In the embossing process, as shown in FIG. 3, the wavy pattern 11 is formed on both ends 10 ′ in the width direction of the metal plate 1 ′ having a predetermined width, and both ends 10 ′ in the width direction of the metal plate 1 ′. A pattern 22 and a width direction joint 23 are formed on the inside of the handle portion 20 except for the longitudinal joint 21 (see the shape of the surface of the metal plate 1 ′ in the AA cross section on the left side of FIG. 3). Thereby, embossing can be performed, shrink | contracting metal original plate 1 'uniformly about a longitudinal direction. Therefore, it is possible to reduce torsion and warpage generated in the metal plate 1 without applying tension during embossing.

  In the embossing process, it is preferable to form the width direction joint 23 by extending the pattern 22 and both sides in the width direction in the region where the longitudinal joint 21 is provided. In the case where no processing is performed on the region where the longitudinal joint 21 is provided, distortion occurs because the amount of shrinkage is different between the region where the longitudinal joint 21 is provided and the region where the pattern 22 and the width joint 23 are formed. Arise. On the other hand, when the width direction joint 23 is provided by extending the pattern 22 or the width direction in the region where the longitudinal direction joint 21 is provided, the region including the region where the longitudinal direction joint 21 is provided is further uniform in the longitudinal direction. The metal original plate 1 ′ can be contracted.

<Groove formation process>
In the groove forming step, roll forming machines 110A to 110C (see FIG. 2) are used as an example of the groove forming machine 110, and a plurality of grooves to be the longitudinal joint 21 are formed in a plurality of stages. Specifically, four trapezoidal grooves are formed in the width direction on the inner side of both end portions 10 ′ in the width direction of the metal original plate 1 ′ in three steps at equal intervals, as shown in FIG. A longitudinal joint 21 is formed over the entire length in the longitudinal direction (see the shape of the surface of the metal original plate 1 ′ in the BB cross section on the left side of FIG. 4). Here, in addition to the roll molding machine, the grooves may be formed by a press machine, but it is preferable to use a roll molding machine from the viewpoint of productivity. Further, by disposing the roll forming machine 110 immediately downstream of the embossing roll 100, it is possible to reduce the positional deviation of the handle 20 between the embossing process and the groove forming process.

The case where the pattern 22 and the width direction joint 23 extended in the width direction both sides are formed also in the area | region in which the longitudinal direction joint 21 is formed in the emboss formation process mentioned above is demonstrated.
When the longitudinal joint 21 is formed in the groove forming step, the depth of the longitudinal joint 21 is deeper than the depth of the pattern 22 and the depth of the width joint 23, and thus the region in which the longitudinal joint 21 is formed. The pattern 22 and the joint 23 in the width direction that have been formed disappear. Therefore, even if a slight misalignment occurs in the width direction between the embossing step and the groove forming step, it is easy to synchronize the handle of the handle portion.

  As described above, according to the manufacturing method of the present invention, in the embossing process, the pattern 11 for preventing undulation and the handle excluding the longitudinal joint 21 among the handle portion 20 are formed, and uniform in the longitudinal direction. Shrink the metal plate 1 ′. Thereafter, in the groove forming step, a groove serving as the longitudinal joint 21 is formed in which the metal original plate 1 ′ is less affected in the longitudinal direction. Thereby, even if it is a case where a deep joint and a pattern are formed, the metal plate 1 which reduced the twist and curvature without applying tension | tensile_strength can be obtained. Moreover, since the manufacturing method of this invention does not require the load of tension | tensile_strength, it is suitable also for a high strength steel plate. Moreover, even if it applies to the steel plate by which plating and coating were given, generation | occurrence | production of the crack and crack of a plating layer or a coating layer in the middle of a process can be suppressed.

  Through the above-described manufacturing process, the metal original plate 1 ′ on which the wavy pattern 11 and the pattern portion 20 are formed is passed through a roll stand for forming the fitting portion 10 to form the fitting portion 10. Thereafter, the metal plate 1 may be obtained by cutting into an appropriate length. However, in consideration of productivity, it is preferable to manufacture as follows. After forming the fitting portion 10 on the metal original plate 1 ′ on which the undulation preventing pattern 11 and the pattern portion 20 are formed, the foamed urethane or the like serving as a core material is filled, and the back surface of the foamable urethane or the like is formed into a sheet-like back surface. A metal siding composed of the metal plate 1 can be produced in one line if it is covered with a material, heated as necessary to foam foaming urethane, and then cut to an appropriate length. it can.

  The manufacturing method according to this embodiment described above has the following effects.

  (1) In the present invention, the metal plate 1 for metal siding including the fitting portion 10 and the handle portion 20 including a longitudinal joint and a predetermined handle is used to prevent the metal original plate 1 ′ from wavy by emboss roll forming. The embossing process which forms the handle 11 and a predetermined pattern, and the groove | channel formation process which forms the longitudinal joint 21 after this embossing process shall be manufactured. Thereby, in embossing, after forming the predetermined handle | pattern except the longitudinal direction joint 21 among the handle | pattern parts 20, after shrink | contracting metal original plate 1 'uniformly about a longitudinal direction, in the groove | channel formation process, metal original plate 1 Since the longitudinal joint 21 having less influence of shrinking 'in the longitudinal direction is formed, it is possible to reduce the occurrence of undulations or the like at the width direction both ends 10' of the metal original plate 1 'without applying a tension. Therefore, the metal plate 1 which reduced generation | occurrence | production of a wrinkle, a twist, a curvature, etc. can be obtained.

  (2) The predetermined pattern includes a pattern 22 formed with predetermined unevenness. Thereby, in the emboss formation process, the pattern 11 and the pattern 22 for preventing undulation are formed, so that the metal original plate 1 ′ can be uniformly shrunk in the longitudinal direction.

  (3) The pattern 22 is formed in the embossing process in the region where the longitudinal joint 21 is formed in the groove forming process. Thereby, the metal original plate 1 ′ can be contracted more uniformly in the longitudinal direction, including the region where the longitudinal joint 21 is formed.

  (4) The depth of the pattern 22 is made shallower than the depth of the longitudinal joint 21. Thereby, the pattern 22 formed in the region where the longitudinal joint 21 is formed in the embossing process disappears when the longitudinal joint 21 is formed in the groove forming process. Therefore, even if a slight misalignment occurs in the width direction between the embossing step and the groove forming step, it is easy to synchronize the handle of the handle.

  (5) The predetermined handle includes the width direction joint 23 formed by a plurality of grooves along the width direction. Thereby, in the emboss formation process, the wavy pattern 11 and the width direction joint 23 are formed, so that the metal original plate 1 ′ can be uniformly shrunk in the longitudinal direction.

  (6) In the embossing step, the widthwise joints 23 are formed to extend to both sides in the widthwise direction in the region where the longitudinal joints 21 are formed in the groove forming step. Thereby, the metal original plate 1 ′ can be contracted more uniformly in the longitudinal direction, including the region where the longitudinal joint 21 is formed.

  (7) The depth of the width direction joint 23 is set to be shallower than the depth of the longitudinal direction joint 21. Thereby, the width direction joint 23 formed in the region where the longitudinal joint 21 is formed in the embossing process disappears when the longitudinal joint 21 is formed in the groove forming process. Therefore, even if a slight misalignment occurs in the width direction between the embossing step and the groove forming step, it is easy to synchronize the handle of the handle.

  (8) The metal original plate 1 ′ is a steel plate. Since the manufacturing method of the present invention does not need to apply tension to the metal original plate 1 ′ during processing, even if a high strength steel plate is used as the metal original plate 1 ′, it is processed satisfactorily to reduce the occurrence of twisting and warping. The metal plate 1 can be obtained.

  (9) The steel plate of the metal original plate 1 ′ is a plated steel plate. Since the manufacturing method of the present invention does not need to apply tension at the time of processing, even if a plated steel plate is used as the metal original plate 1 ′, the metal plate 1 with reduced generation of cracks and cracks in the plated layer can be obtained.

  (10) The steel plate of the metal original plate 1 ′ is a coated steel plate. Since the manufacturing method of the present invention does not need to apply tension at the time of processing, even if a coated steel plate is used as the metal original plate 1 ′, it is possible to obtain the metal plate 1 with reduced generation of cracks and cracks in the coating layer.

  Next, a metal plate 1 of an example manufactured by the manufacturing method of the present embodiment and a metal plate of a comparative example manufactured using a conventional technique will be described. As Comparative Example 1, a metal plate 1a of Comparative Example 1 in which a longitudinal joint, a width joint, a pattern surrounded by the joint, and a pattern for preventing undulation were formed using only a pair of embossing rolls was manufactured. Moreover, the metal plate 1b of the comparative example 2 for comparing the influence which it has at the time of embossing by the presence or absence of a longitudinal direction joint using the forming roll and a pair of embossing roll as the comparative example 2 was manufactured.

In Example 1 and Comparative Example 2, a strip-shaped coated steel plate having a plate thickness of 0.27 mm and a width of 516.5 mm was used as the metal original plate 1 ′ and the metal original plate 1 b ′. A strip-shaped coated steel plate having a width of 27 mm and a width of 512 mm was used. The reason why Example 1 and Comparative Example 2 used a coated steel sheet having a width longer than that of Comparative Example 1 was that the shrinkage in the width direction was taken into account by forming the groove by bending with the roll forming machine 110. It is.
The coated steel sheet is a molten 55% aluminum-zinc alloy plated steel sheet whose original sheet standard conforms to JIS G3321-1998, and the coating adhesion amount is 120 g / m ² or more in terms of the average adhesion amount on both sides. A general coated steel sheet coated with resin-based paint was used.

  As the embossing roll 100 for obtaining the metal plate 1 for metal siding of the present invention, a pair of upper and lower rolls 100A and 100B having a diameter of 300 mm and a length in the width direction of 600 mm were used. The pair of upper and lower rolls are engraved so that the pattern described below is formed on the surface of the metal original plate 1 ′ when the metal original plate 1 ′ is passed with the clearance close to the thickness of the metal original plate 1 ′. did.

  In the region where the handle 20 is formed, the shape of the surface side of the metal original plate 1 ′ is 3 mm in height (depth), the length of the bottom along the width direction is 381 mm, and the length of the upper side along the width direction. A convex shape having a 375 mm trapezoidal cross-sectional shape in the longitudinal direction, and grooves and patterns serving as joints in the width direction are formed.

The region that becomes the longitudinal joint 21 is composed of four belt-like regions that are not processed at all. The four belt-like regions extend over the entire length in the longitudinal direction at equal intervals in the width direction in the region where the handle 20 is formed.
The joint in the width direction is composed of a plurality of grooves having a trapezoidal shape having a height (depth) of 2 mm, a length of the bottom along the longitudinal direction of 2 mm, and a length of the upper side of 6 mm along the longitudinal direction, and a cross-sectional shape in the width direction. Is done. The plurality of grooves are irregularly arranged at intervals of 100 mm to 300 mm in the longitudinal direction so as to connect the band-shaped regions serving as joints in the longitudinal direction.
As the pattern, a fine stone-like pattern is formed on the upper surface of the truncated pyramid surrounded by the joint in the longitudinal direction and the joint in the width direction.
The pair of upper and lower rolls 100A and 100B are engraved so that the joints in the longitudinal direction, the joints in the width direction, and the pattern are formed and the surface of the metal original plate 1 ′ has a block tone.

  Further, at both ends 10 ′ in the width direction of the metal original plate 1 ′ to be the fitting portion 10, as a undulation pattern 11, a length of 69 mm from the width direction end surface toward the inside in the width direction, and an interval of 1.0 mm in the longitudinal direction, The pair of upper and lower rolls 100A and 100B are engraved so that a wave pattern with a depth of 0.4 mm is formed.

  As a groove forming machine 110 for obtaining the metal plate 1 for metal siding of the present invention, an embossed metal original plate 1 ′ has a height (depth) of 3 mm, and a base length along the width direction of 5 mm, Roll forming machine 110A designed to form four grooves with a trapezoidal shape with a length of 11 mm in the upper side along the width direction and a longitudinal sectional shape in three steps at equal intervals in the width direction. ~ 110C was used.

  The forming profile is formed using the first-stage roll 110A so that the second and third rolls are 2.0 mm deep in the width direction, and the first and fourth rolls are deep using the second-stage roll 110B. The second and third rolls were formed to have a depth of 2.5 mm, a third roll 110C, and a groove having a depth of 3 mm.

  As an embossing roll for obtaining the metal plate 1a of Comparative Example 1, a pair of upper and lower rolls having a diameter of 300 mm and a length in the width direction of 600 mm were used. The pair of upper and lower rolls are engraved so that the pattern described below is formed on the surface of the metal original plate 1a ′ when the metal original plate 1a ′ is passed through the metal plate 1a ′ with a clearance close to the thickness of the metal original plate 1a ′. did.

  The region where the handle portion is formed is a trapezoid having a height (depth) of 3 mm, a length of the bottom side along the width direction of 381 mm, and a length of the upper side along the width direction of 375 mm from the surface of the metal original plate 1a ′. It is a convex shape having a cross-sectional shape in the longitudinal direction, and a groove serving as a longitudinal joint, a groove serving as a width joint, and a pattern are formed.

The longitudinal joint is composed of four grooves having a longitudinal cross-sectional shape of a trapezoid having a height (depth) of 3 mm, a base length along the width direction of 5 mm, and an upper side length of 11 mm along the width direction. Composed. The four grooves are formed over the entire length in the longitudinal direction at equal intervals in the width direction in the region where the handle 20 is formed.
The joint in the width direction is composed of a plurality of grooves having a trapezoidal shape having a height (depth) of 2 mm, a length of the bottom along the longitudinal direction of 2 mm, and a length of the upper side of 6 mm along the longitudinal direction, and a cross-sectional shape in the width direction. Is done. The plurality of grooves are irregularly arranged at intervals of 100 mm to 300 mm in the longitudinal direction so as to connect the grooves constituting the joint in the longitudinal direction.
As the pattern, a fine stone-like pattern is formed on the upper surface of the truncated pyramid surrounded by the joint in the longitudinal direction and the joint in the width direction.
The pair of upper and lower rolls are engraved so that the joints in the longitudinal direction, the joints in the width direction, and the pattern are formed and the surface of the metal original plate 1 ′ has a block tone.

  Further, at both ends 10 ′ in the width direction of the metal original plate 1 ′ to be the fitting portion 10, as a undulation pattern 11, a length of 69 mm from the width direction end surface toward the inside in the width direction, and an interval of 1.0 mm in the longitudinal direction, The pair of upper and lower rolls are engraved so that a wave pattern having a depth of 0.4 mm is formed.

  The roll forming machines 110A to 110C used in Example 1 were used as the groove forming machine 110 for obtaining Comparative Example 2, and the pair of upper and lower rolls 100A and 100B used in Example 1 were used as the embossing roll 100.

  In both Example 1 and Comparative Examples 1 and 2, the metal original plate was passed at a line speed of 15 m / min. In the band-shaped metal original plate, a marking line in the width direction was put in an arbitrary portion in the longitudinal direction at an interval of 1 m. For each of Example 1 and Comparative Examples 1 and 2, in the state before the fitting portion is formed after the corrugation preventing pattern, the longitudinal joint, the width joint and the pattern are applied to the metal original plate, The interval was measured. From these measurement results, the amount of shrinkage in the longitudinal direction of each metal original plate was calculated, and the amount of shrinkage was compared. Table 1 shows the results of measuring the amount of shrinkage (%) in the longitudinal direction at positions A to C in FIG.

  In the case of Example 1 in which the longitudinal joint was formed after embossing by embossing according to the present invention, the position (A) between the grooves in the longitudinal joint was reduced by “1.20%”. On the other hand, at the groove position (B) constituting the longitudinal joint, the shrinkage was “1.15%”, and at both ends (C) of the handle portion where the material easily flows, “1.15%” was shrunk. Therefore, only a difference of “0.05%” occurred between the position (B) and the position (A). Further, when the metal original plate 1 ′ obtained in Example 1 was formed with a fitting portion to form a metal siding, no cracks occurred on the surface of the metal plate 1, and the metal plate 1 and the metal siding itself warped. No twisting occurred.

  In the case of Comparative Example 1 formed with a conventional one-stage embossing roll, the groove constituting the longitudinal joint is shortened by “1.43%” at the position (A) between the grooves in the longitudinal joint. At position (B), it shrank by “1.33%”, and at both ends (C) of the handle portion where the material tends to flow, it shrank by “1.45%”. Therefore, a difference of “0.1%” occurred between the position (B) and the position (A). Further, when a metal siding is formed by forming a fitting portion on the metal original plate 1a ′ obtained in Comparative Example 1, a coating film crack occurs on the surface of the metal plate 1a, and the metal plate 1a and the metal siding itself are warped and twisted. Occurred.

  Next, in the case of Comparative Example 2 in which the longitudinal joint is formed first and then embossed by embossing, the position (A) between the grooves in the longitudinal joint is reduced by “1.28%”. On the other hand, the groove position (B) constituting the longitudinal joint contracted by “1.20%”, and both ends (C) of the handle portion where the material easily flows in contracted by “1.25%”. Therefore, a difference of “0.8%” occurred between the position (B) and the position (A). Further, when a metal siding is formed by forming a fitting portion on the metal original plate 1b ′ obtained in Comparative Example 2, a coating film crack occurs on the surface of the metal plate 1b, and the metal plate 1b and the metal siding itself are warped and twisted. Occurred.

  From the above results, according to the method for producing a metal plate for metal siding according to the present invention, the amount of shrinkage in the longitudinal direction of the handle portion can be made uniform, and the handle portion having a good appearance with reduced torsion and warpage occurring in the metal plate. It can be understood that a metal plate for metal siding exhibiting is obtained.

DESCRIPTION OF SYMBOLS 1 Metal plate 1 'Metal original plate 10 Fitting part 11 Wavy pattern 20 Pattern part 21 Longitudinal joint 22 Pattern 23 Width direction joint 100 Embossing roll 110 Groove forming machine

Claims (10)

Manufacture of a metal plate for metal siding having a predetermined width and including a fitting portion provided on both sides in the width direction for connection in the width direction, and a handle portion provided on the inner side in the width direction than the fitting portion A method,
The handle portion includes a longitudinal joint composed of a plurality of grooves formed over the entire length in the longitudinal direction, and a predetermined handle,
The embossing roll forming forms a wavy pattern on both ends in the width direction as the fitting portion of the metal original plate having a predetermined width, and the predetermined pattern on the inner side of the width direction both ends of the metal original plate. Forming an embossing process;
After the embossing step, a groove forming step for forming the longitudinal joints inside the width direction both ends of the metal original plate,
A method for manufacturing a metal plate for metal siding, comprising:   The method for manufacturing a metal plate for metal siding according to claim 1, wherein the predetermined pattern includes a pattern formed with predetermined unevenness.   The manufacturing method of the metal plate for metal siding according to claim 2, wherein in the embossing step, the pattern is formed in a region where the longitudinal joint is formed.   The depth of the said pattern is a manufacturing method of the metal plate for metal siding of Claim 3 shallower than the depth of the said longitudinal direction joint.   The said predetermined handle is a manufacturing method of the metal plate for metal siding in any one of Claims 1-4 containing the width direction joint comprised by the some groove | channel along the width direction.   6. The method for manufacturing a metal plate for metal siding according to claim 5, wherein the width direction joint is extended to both sides in the width direction in the emboss formation step in a region where the longitudinal joint is formed in the groove forming step.   The depth of the said width direction joint is a manufacturing method of the metal plate for metal siding of Claim 6 shallower than the depth of the said longitudinal direction joint.   The said metal original plate is a steel plate, The manufacturing method of the metal plate for metal siding in any one of Claims 1-7.   The method for manufacturing a metal plate for metal siding according to claim 8, wherein the steel plate is a plated steel plate.   The method for producing a metal plate for metal siding according to claim 8 or 9, wherein the steel plate is a coated steel plate.

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