JPS61193850A - Manufacture of synthetic resin composite metallic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides the following features:
The present invention relates to a method of manufacturing a synthetic resin composite metal plate formed by bonding two metal plates together by heat fusion.

(Prior art) In recent years, the requirements for the functions of metal plates, that is, metal sheets, have diversified. For example, by interposing a synthetic resin layer between two thin steel plates and combining them, it is possible to Even if the thickness is almost the same as that of a steel plate, it is possible to achieve a significant weight reduction without reducing rigidity, and is used for automobile body construction materials. These are called lightweight sand inch steel plates. In addition, a relatively thin synthetic resin layer with a thickness of approximately 0.03 to 0.1 ms is interposed between the two steel plates to create a composite, which improves the distribution properties.
Various combinations of so-called vibration-damping steel plates, two steel plates of different thicknesses, or two metal plates of different materials, such as an aluminum plate and a carbon steel plate, or a stainless steel plate and a plated steel plate, can be used for the intermediate layer depending on the purpose. It is composited with a synthetic resin layer of different thickness and material, and is widely used as a panel material with improved required functions such as corrosion resistance, heat insulation, and soundproofing.

Conventionally, methods for producing this type of synthetic resin composite metal plate (hereinafter also simply referred to as "composite metal plate") include an adhesive manufacturing method and a heat-fusion manufacturing method. The mold manufacturing method involves uniformly applying a synthetic resin adhesive to the joint surfaces of metal plates, heating and melting the adhesive, or drying it.
Next, another metal plate is supplied and bonded together using an adhesive.On the other hand, in the heat-sealing manufacturing method, the metal plate is heated to a required temperature higher than the melting temperature of the synthetic resin that forms the intermediate layer. A thermoplastic synthetic resin sheet (hereinafter also simply referred to as "synthetic resin" or "synthetic resin sheet 1") is supplied to the surface of this metal plate and pressure-bonded to form a bonding interface layer or synthetic resin sheet on the surface of the metal plate. The entire resin sheet may be melted and bonded together using the heat retained by the metal plate, or a synthetic resin sheet may be stacked in the middle of two metal plates in a sandwich shape, and this may be heated to bond the synthetic resin. The interface layer or the entire synthetic resin sheet is melted and then pressed and bonded together.

By the way, as a typical conventional example of such a heat-sealing manufacturing method, a synthetic resin sheet also in the shape of a cut plate is sandwiched between two metal plates in the shape of a cut plate. There is a method in which a large number of sets are laminated, heated in a heating furnace to a required temperature equal to or higher than the melting temperature of the synthetic resin, and then pressure fused in a press.

However, this method has low efficiency and is limited to manufacturing cut-shaped composite metal plates.

However, when used in mass-produced applications such as automobile body construction materials, coiled long strips are often required. Some representative conventional examples of manufacturing such a coiled composite metal plate using the principle of the heat-sealing manufacturing method described above will be described with reference to some examples.

For example, the method disclosed in Japanese Unexamined Patent Publication No. 58-163646 is a method of manufacturing a desired composite metal plate by two passes. First, in the first pass, the metal plate is unwound from the metal band coil ' attached to the payoff reel, heated in a heating furnace, and sent to a pair of pressure rolls. On the other hand, the synthetic resin sheet is unwound from the synthetic resin coil attached to the synthetic resin uncoiler, and is supplied onto the top surface of the metal plate, where it is crimped by a pair of pressure rolls and comes into contact with the metal plate to form an interface layer due to its retained heat. melted and glued. After cooling, it is wound onto a tension reel to produce a product coil. Next, in the second pass, the other metal coil is attached to the payoff reel, and the product coil produced in the first pass is attached to the product payoff reel, almost in the same way as in the first pass. The metal plate and the product sheet are joined together to produce a synthetic resin composite metal strip.

However, when comparing the entire line, this method requires a two-pass manufacturing process, which not only increases costs, but also increases the number of handling operations, leading to quality deterioration such as damage to the product. Furthermore, since there is a large temperature difference between the upper and lower metal plates during the second pass of lamination, the product after cooling will warp in width, resulting in deterioration of quality. Moreover, sufficient adhesive strength cannot be obtained. Furthermore, if the warped product is forcibly rolled flat with a tension reel, the bonded synthetic resin part may undergo shear strain or peeling, and the metal plate may become wrinkled, leading to quality deterioration.

Further, for example, Japanese Patent Application Laid-Open No. 58-203051 discloses a method for producing a composite metal plate by one pass.

That is, the respective metal plates rewound from the payoff reel are stacked by an inlet stacking roll and guided to a heating device, and then the two metal plates are separated vertically again by an output stacking roll and a separating roll.

A synthetic resin sheet is supplied between the two metal plates separated in this way, and the three layers of the metal plate and the synthetic resin sheet are fused using a pressure roll, and then a reheating device, a cooling device, and a skin pass mill are installed. The composite metal plate is manufactured in the form of a coil or a cut plate by winding it on a tension reel. Since the synthetic resin sheet is melted and bonded using the heat retained in the pre-heated metal plate, the metal plate must be kept at a higher temperature to account for the heat of melting of the synthetic resin sheet, so the metal plate is coated with a temper color or Heat buckling is likely to occur. Furthermore, if the temperature of the metal plate is insufficient, the adhesive strength will decrease.

In addition, when comparing the entire line, since the interval from leaving the heating device to bonding the three calendars is long, heat is radiated to the atmosphere and the rolls, which not only increases costs, but also has poor temperature control accuracy. The quality is also low.

Furthermore, the payoff reel for the synthetic resin sheet or the mechanism for introducing it between the metal plates must be installed in a narrow space between the upper and lower heating metal plates, making installation difficult.

(Problems to be Solved by the Invention) An object of the present invention is to provide a heat-sealing manufacturing method for a synthetic resin composite metal plate, which improves the drawbacks of the prior art as described above.

(Means for Solving the Problems) Thus, the inventors of the present invention have made extensive studies to achieve the above-mentioned object, and have found that the heat supply should be from the heating roll and the heat supply should be continued even after lamination. For the purposes stated above,
In particular, knowing that the improvement of bond strength can be effectively achieved,
Now that the present invention has been completed, the gist of the present invention is to provide a method for manufacturing a composite metal plate consisting of an intermediate layer of a thermoplastic synthetic resin sheet and two metal plates bonded together via the intermediate layer. Then, one metal plate is wound around a heating roll, and when the temperature of the one metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, the thermoplastic synthetic resin sheet is wrapped around the opposite roll of the one metal plate. After the thermoplastic synthetic resin sheet is supplied to the contact side and bonded together using the first pressure roll, the heat required for melting the thermoplastic synthetic resin sheet is continued to be supplied while being wound around the heating roll. A first step of heating and melting the thermoplastic resin sheet while promoting a thermal fusion reaction between the bonding surface of the resin sheet and the one metal plate, and then the thermoplastic synthetic resin sheet. The other metal plate heated to a melting temperature of and a second step of laminating the other metal plate of the thermoplastic synthetic resin sheet to the thermoplastic synthetic resin sheet.

Further, the position of the first-stage pressure bonding roll that engages with the heating roll on the circumference of the heating roll can be freely adjusted, and the position of the first pressing roll that engages with the heating roll can be adjusted according to the material, thickness, etc. of the synthetic resin sheet. The continuation period of heat supply to the bonding surface after bonding with the corrugated pressure rolls may be adjustable.

Furthermore, the second-stage pressure roll may also be used as a heating roll, and the above-described first step may be repeated as a second step using the second-stage pressure roll.

That is, according to another aspect, the present invention is a method for manufacturing a composite metal plate consisting of an intermediate layer of a thermoplastic synthetic resin sheet and two metal plates bonded via the intermediate layer, comprising:
One metal plate is wound around a heating roll, and when the temperature of the one metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, the thermoplastic synthetic resin sheet is placed on the side opposite to the roll contacting side of the one metal plate. After the thermoplastic synthetic resin sheet is supplied to the thermoplastic resin sheet and bonded together using the first pressure roll, the heat required for melting the surface layer of the thermoplastic synthetic resin sheet is continued to be supplied while winding the thermoplastic synthetic resin sheet around the heating roll. The first step is to advance the heat fusion reaction between the bonding surfaces of the synthetic sheet and one of the metal plates, and the second step of the bonding roll is to engage the other metal plate with the heating roll. It is wound around a second heating roll, and when the temperature of the other metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, it is supplied to the bonding surface of the synthetic resin sheet opposite to the bonding surface. , the other metal plate is laminated to the thermoplastic synthetic resin sheet by the second heating roll, which also serves as a second-stage pressure roll, to perform three-layer bonding, and then the second heating roll By continuing to replenish the amount of heat required for melting the surface layer of the thermoplastic synthetic resin sheet while wrapping the thermoplastic synthetic resin sheet around the thermoplastic synthetic resin sheet, the heat fusion reaction of the bonding surface between the thermoplastic synthetic resin sheet and the other metal plate proceeds. This is a method for manufacturing a synthetic resin composite metal plate, characterized in that it comprises a second step of applying the method.

In addition, the circumferential position of the first heating roll, which also serves as the second-stage pressure roll, is also adjustable.
The duration of heat supply to the bonding surface after bonding by the second-stage pressure roll may be adjustable.

As described above, according to the present invention, the heating roll continues to replenish the amount of heat required for melting the surface layer of the resin sheet even after bonding, so the temperature of the metal plate is kept at a relatively low temperature (preferably, the melting point of the resin +10 Since the resin sheet can be sufficiently melted and bonded while being maintained at a temperature of about 100.degree.

In addition, the present invention not only eliminates the above-mentioned drawbacks in the entire line, but also uses heating rolls for all the rolls in the heating area of the metal plate, so that the bonding surface between the metal plate and the thermoplastic synthetic resin can be heated. guidance and heating at the same time,
The entire line has been made more compact.

Furthermore, in the present invention, preferably, after one metal plate starts contacting the heating roll, the synthetic resin sheet is pressed by the first pressure roll when the melting temperature of the synthetic resin reaches about 10°C. Press it onto the surface of this one metal plate,
Fuse. Since the synthetic resin sheet continues to be in contact with the heating roll thereafter, the amount of heat required for melting the synthetic resin sheet is replenished during this period, and good fusion conditions are obtained.

Note that this heating continuation time after supplying the synthetic resin sheet is the first
This can be changed by adjusting the position of the crimping roll on the stage.

According to a further preferred embodiment, the heat supply continuation time can be changed by the same position adjustment for the second-stage pressure roll.

Therefore, even if the material, thickness, etc. of the synthetic resin sheet changes, it is possible to provide optimal operating conditions corresponding to the changes, thereby achieving high quality and making it possible to manufacture a wide variety of products.

(effect) The invention will now be further explained in connection with the drawings.

FIG. 1 is a partially cross-sectional schematic diagram showing one embodiment of the present invention; FIG. 2 is a partially cross-sectional schematic diagram showing another embodiment of the present invention; and FIG. 1 is a schematic illustration of an entire manufacturing line incorporating the method; FIG.

In FIG. 1, a metal plate A (indicated by reference numeral 1) which has been previously subjected to known pre-treatments such as degreasing and chromate treatment is first wound around a heating roll 5 and heated to a predetermined temperature. At this point, a thermoplastic synthetic resin sheet 3 is supplied to the side opposite to the roll contact side, and this synthetic resin sheet 3 is bonded to the metal plate A by the first-stage pressure roll 6. On the other hand, a metal plate B (indicated by reference numeral 2) which has been heated in advance to a predetermined temperature by a heating roll (not shown) is supplied while being wound around a second-stage pressure roll 7, and is supplied to the synthetic resin sheet 3.
In the figure attached to the outer surface of the sheet, reference numeral 8 indicates the synthetic resin melted portion of the synthetic resin sheet 3.

The circle of the first-stage pressure roll 6 that engages with the heating roll adjusts the thickness of the synthetic resin melting portion 8 from the contact surface with the metal plate A and promotes the fusion reaction on the contact surface. Reference numeral 6a designates a swing arm of the first stage pressure bonding roll 6, which may be moved to a position on the circumference as indicated by an arrow in the figure.

FIG. 2 shows an example in which the second-stage pressure roll 7 also serves as a heating roll, and in the illustrated example, the second-stage pressure roll 7 that also serves as a heating roll has a metal plate B (symbol B) attached thereto. A synthetic resin melting part 8 is seen in the area adjacent to the metal plate B (as shown in FIG. In addition, in order to promote the fusion reaction on the contact surface, the second stage pressure bonding roll 7 may be moved on the circumference to the position shown by the arrow in the figure.

According to the apparatus shown in Fig. 2, the adhesive strength is the same as that shown in Fig. 1 while saving energy without melting all of the synthetic resin film, or the heat supply after adhesion at the second stage pressure roll is used. As the fusion reaction progresses, an adhesive strength greater than that shown in FIG. 1 can be obtained.
- Figure 3 shows the entire line incorporating the method of the present invention. Heating is in progress.

In the diagram, first payoff reel 11, metal plate coil 1 in workpiece 3.
2. After setting 14, send out metal plates 1 and 2. The metal plates 1 and 2 have been previously subjected to known pretreatments such as degreasing and chromate treatment, as described above.

Each metal plate is heated while being guided to the bonding section by heating rolls 5, 7, 9 and IO.

On the other hand, a thermoplastic synthetic resin sheet 3 is supplied from a film payoff reel and melt-bonded to one metal plate 1 by a first-stage pressure roll 6. Naturally, by this point, the metal plate 1 has been heated by the heating rolls 9 and 5 to a temperature approximately equal to the melting temperature of the synthetic resin sheet + lθ°C. - After the synthetic resin sheet 3 is brought into contact with the metal plate 1 on one side, it is used to replenish the amount of heat consumed in melting the synthetic resin sheet on the surface of the metal plate and to supply the amount of heat required to heat the unmelted portion of the synthetic resin sheet. Similarly, the heat supply by the heating roll 5 is continued.

Here, the first stage crimping roll 6, including the actuator for crimping, is mounted on a swing arm 6a, and this swing arm 6a is pivotally connected to the axis of the heating roll 5. The first stage pressure roll 6 can be placed at any position on the circumference.

Note that this moving mechanism is not limited to a swing type, and may be a vertical moving mechanism that remains horizontal.

This moving mechanism allows the above-mentioned heating continuation time to be adjusted, making it possible to manufacture high-quality synthetic resin composite metal plates by performing operations that match the conditions such as the material and thickness of the synthetic resin sheet.

Next, the metal 112 heated to a predetermined temperature by the heating roll 1O17 is adhered to the upper side of the synthetic resin sheet 3 by the second pressure roll 7. At this time, the heating roll 7 also serves as a second-stage pressure roll, so that the heating roll 7 can be pressed by an actuator. Naturally, the pressing force can also be adjusted.

After this, the synthetic resin composite metal plate 4, to which the three layers of the metal plate 1, the synthetic resin sheet 3, and the metal plate 2 are joined, is heated using a reheating device.
The resin is reheated at IF15 to a temperature higher than its melting point to age the synthetic resin and increase adhesive strength.

If necessary, it is also possible to incorporate a device such as a calender roll after the reheating device 15 for the purpose of correcting the thickness of the product. The product is wound onto a tension reel 18 via a priddle roll and shear to become a product.

By the way, as already mentioned, in the case of this example, the second-stage pressure roll 7 is a heating roll, and like the first-stage pressure roll 6, its placement position can be adjusted on the circumference of the heating roll 5. In addition, an auxiliary heating roll was provided for each.

Next, the functions and effects of the present invention will be explained with reference to Examples.

In this example, using the device shown in Figure 3, the plate thickness is 0.24mm,
A composite metal plate was manufactured by setting an aluminum plate coil with a width of 864 m on the payoff reel 13 and a steel plate coil with a plate thickness of 1.2 m and a width of 914 m on the payoff reel 11.

All metal plates were subjected to known degreasing and chromate treatment.

Heating roll 10 at 100°C, heating roll 7 at 120°C,
The temperature of the heating roll 5 was set at 215°C, and the temperature of the heating roll 9 was set at 150°C, and as the synthetic resin sheet 3, a modified polypropylene resin film (ff2: 0.6■■, width: 860■■) was used.

In the reheating device 15, the temperature of the heat generating heater was adjusted to 600° C., and the material was cooled, dried, and wound up.

There was no warpage or wrinkles in the product, and a sample was taken from the product and the peel strength was measured, and it was 7.5 to 9.0 kg.
A good result of /am was obtained, and when the peeled area was observed, no bubbles were observed. In this regard, in the conventional method, the weight was 4 to 8 kg and 7 cm at most.

Big Flag 1 In this example as well, using the device shown in Fig. 3, cold-rolled steel coils with a thickness of 0.8 mm and a width of 930 mm were set on the payoff reels 11 and 13, respectively, and the heating roll 10 was
℃ heating roll 5.7 to 120℃, heating roll 9 to 70℃
A polyethylene resin film (thickness: 0.05 am, width: 880 m+w) was used as the synthetic resin sheet 3.

Other operating conditions were the same as in Example 1.

As before, the product had no warpage or wrinkles, and the peel strength was 5.0 to 5.25 kg/cm, a good result commensurate with the sheet material, and no air bubbles were observed in the peeled area. There wasn't.

As explained above, the present invention eliminates the drawbacks of the conventional heat-sealing manufacturing method for synthetic resin composite metal plates, and is a manufacturing method that aims to achieve low cost and high quality. This is an excellent manufacturing method that can fully handle the diversification of products.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory partial cross-sectional view showing the IB aspect of the present invention; FIG. 2 is a schematic explanatory partial cross-sectional view showing another aspect of the present invention; and FIG. 1 is a schematic illustration of an entire manufacturing line incorporating the method; FIG. 1: Metal plate A, 2: Metal plate B, 3: Synthetic resin sheet 4: Synthetic resin composite metal plate 5: Heating roll 6
: 1st stage crimping roll 7: 2nd stage crimping roll 8: Synthetic resin melting section J/I>1 Fig. δ, meeting melting section 2rjJ Jllll,, 3t21

Claims (4)

[Claims] (1) A method for manufacturing a composite metal plate consisting of an intermediate layer of a thermoplastic synthetic resin sheet and two metal plates bonded via the intermediate layer, the method comprising: winding one metal plate around a heating roll; At the point where the temperature of one metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, the thermoplastic synthetic resin sheet is supplied to the opposite roll contact side of the one metal plate, and the first
After bonding with a corrugated pressure roll, the heat required for melting the thermoplastic synthetic resin sheet is continued to be supplied while the thermoplastic synthetic resin sheet and the one of the metals are bonded together while being continuously wound around the heating roll. A first step of heating and melting the thermoplastic resin sheet while promoting a heat fusion reaction on the surface to be bonded to the plate, and then a second step of heating the thermoplastic resin sheet to a temperature higher than the melting temperature of the thermoplastic synthetic resin sheet. A second metal plate is supplied to the bonding surface of the thermoplastic synthetic resin sheet opposite to the bonding surface, and the second metal plate engages with the heating roll.
A method for manufacturing a synthetic resin composite metal plate, comprising a second step of laminating the other metal plate to the thermoplastic synthetic resin sheet using a stepped pressure roll. (2) The position of the first-stage pressure roll that engages with the heating roll on the circumference of the heating roll can be freely adjusted, and after the bonding by the first-stage pressure roll, The method for producing a synthetic resin composite metal plate according to claim 1, wherein the duration of heat supply to the bonding surface is adjustable. (3) A method for manufacturing a composite metal plate consisting of an intermediate layer of a thermoplastic synthetic resin sheet and two metal plates bonded via the intermediate layer, the method comprising: winding one metal plate around a heating roll; At the point where the temperature of one metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, the thermoplastic synthetic resin sheet is supplied to the opposite roll contact side of the one metal plate, and the first
After bonding with a step pressure roll, the thermoplastic synthetic resin sheet and the thermoplastic synthetic resin sheet are bonded together by continuing to replenish the amount of heat required to melt the surface layer of the thermoplastic synthetic resin sheet while winding it around the heating roll. a first step of advancing a thermal fusion reaction of the bonding surface with one of the metal plates, and then a second heating step that also serves as a second-stage pressure bonding roll that engages the other metal plate with the heating roll. It is wound around a roll, and when the temperature of the other metal plate reaches the melting temperature of the thermoplastic synthetic resin sheet or higher, it is supplied to the bonding surface of the synthetic resin sheet opposite to the bonding surface, and a second stage is formed. The other metal plate is bonded to the thermoplastic synthetic resin sheet by the second heating roll, which also serves as a pressure bonding roll, to form a three-layer bond, and then, while being wound around the second heating roll, the A second step of proceeding with the heat fusion reaction on the bonding surface between the thermoplastic synthetic resin sheet and the other metal plate by continuing to replenish the amount of heat required to melt the surface layer of the thermoplastic synthetic resin sheet. A method for manufacturing a synthetic resin composite metal plate, comprising the steps of: (4) The position of the first-stage pressure roll that engages with the heating roll on the circumference of the heating roll can be freely adjusted, and after the bonding by the first-stage pressure roll, The duration of heat supply to the bonding surface can be adjusted freely, and a second heating roll that also serves as the second-stage pressure roll that engages with the heating roll is arranged on the circumference of the heating roll. The synthetic resin composite according to claim 3, wherein the installation position is adjustable, and the duration of heat supply to the bonded surface after bonding by the second-stage pressure roll is adjustable. Method of manufacturing metal plates.