JP2004098394A - Manufacturing method for thick resin panel to which metal sheet is bonded - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method capable of even continuously bonding thick resin panels using rolls. <P>SOLUTION: The surface of the resin panel 2 is preheated to the melting point of the resin and the metal sheet 4 heated to the melting point or higher is laminated to the resin panel through an adhesive film 3 by a pressure bonding roll 8 before cooled by a cooling roll 9. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a thick resin panel to which metal sheets are joined.
[0002]
[Prior art]
As a method of manufacturing a metal / resin composite sheet while continuously bonding a metal sheet to a resin sheet, for example, there is a method referred to as a resin extrusion in-line lamination method (for example, see Patent Document 1). .
[0003]
That is, the molten resin is extruded into a resin sheet having a predetermined thickness by an extruder, and while the extruded high-temperature resin sheet is transported as it is, the surface of the resin sheet is heated to a temperature higher than the melting point of the resin. Is continuously bonded through an adhesive film, and the metal sheet and the resin sheet are passed through a pressure roll to join them together, and then passed through a cooling roll to cool the joined resin sheet and metal sheet. I have.
[0004]
[Patent Document 1]
JP-A-5-69525 (pages 3 to 5, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in such a conventional technique, while utilizing the heat of the extruded resin sheet, the metal sheet is bonded to the resin sheet by a pressure roll, and then the high temperature at which the metal sheet is bonded is used. Because the resin sheet is cooled by passing it through a cooling roll, if the thickness of the resin sheet is small, the cooling roll can uniformly cool the entire resin sheet, but if the thickness of the resin sheet increases, the resin sheet Can be cooled only on the surface side, and the cooling becomes non-uniform, resulting in a defect such as deformation or sink in the final product.
[0006]
Therefore, although it depends on the equipment of the cooling roll, the thickness of the resin sheet that can be uniformly cooled by the cooling roll is generally about 6 mm, and a resin sheet having a thickness more than that (a panel rather than a sheet). However, when joining metal sheets, a continuous manufacturing method using a pressure roll or a cooling roll cannot be performed. Instead, a metal sheet of the same shape is formed on a resin panel formed in a predetermined shape by a batch manufacturing method using a press. They must be joined one by one. Therefore, the productivity is reduced as compared with the continuous production method using a roll.
[0007]
The present invention has been made by paying attention to such a conventional technique, and provides a manufacturing method capable of performing continuous joining using a roll even with a thick resin panel.
[0008]
[Means for Solving the Problems]
This invention preheats the surface of the resin panel to about the melting point of the resin, attaches the adhesive film to the metal sheet heated to the melting point of the resin or higher, and attaches the metal sheet with the adhesive film to the resin panel from the adhesive film side. While overlapping on the surface, the resin panel is transported to a pressure roll, the resin panel and the metal sheet are continuously joined, and then, the resin panel to which the metal sheet is joined is transported to a cooling roll, It is characterized in that the surfaces of the metal sheet and the resin panel are cooled.
[0009]
According to the present invention, a resin panel that has been once cooled is used instead of using a resin panel that is entirely hot immediately after extrusion. Then, only the surface of the resin panel is preheated to about the melting point, and is transported to a pressure roll to join the metal sheet. Cool sheet and resin panel surfaces. Since only the surface of the resin panel used to be bonded to the metal sheet has a high temperature, the surface and the metal sheet can be reliably cooled even with the cooling rolls of the usual equipment. Therefore, the surface of the resin panel is heated only for a short time for bonding with the metal sheet, and then immediately cooled by the cooling roll, so that the resin panel does not suffer from problems such as deformation and sink. In addition, since the metal sheet can be continuously joined to the long and thick resin panel, there is no reduction in productivity.
[0010]
The metal sheet is not limited to one side of the resin panel, and may be simultaneously bonded to both sides. Then, a laminate in which the resin panel is sandwiched between two metal sheets can be produced.
[0011]
Since it is a manufacturing method in which only the surface of the resin panel is heated and cooled, the thickness of the usable resin panel may be any thickness, but the thickness exceeds the maximum thickness (about 6 mm) by the conventional extrusion in-line lamination method. 30 mm is practical, and the thickness of the metal sheet with respect to that is preferably 0.1 to 0.5 mm.
[0012]
Polyolefin resins such as PP and PE are suitable for the resin panel, and various fillers (talc, calcium carbonate, wood flour, waste paper, etc.) may be added.
[0013]
As the metal sheet, aluminum, steel (various plated steel plates), stainless steel, and their painted plates can be used.
[0014]
As the adhesive film, olefin-based, modified olefin-based, polyurethane-based, and ethylene-vinyl acetate copolymer resin-based adhesive films are preferable.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a sectional view of a manufactured product, and FIG. 2 shows a manufacturing apparatus thereof.
[0016]
As shown in FIG. 1, the product 1 is composed of 50% plastic waste (polyethylene or polypropylene) as a resin panel 2 having a thickness of 12 mm, 20% waste paper, 10% wood chips, and 20% coagulant. It has a structure in which an aluminum-zinc alloy-plated hard plate having a thickness of 0.27 mm as a metal sheet 4 is joined to both surfaces thereof via an EVA film having a thickness of 0.03 mm as an adhesive film 3. .
[0017]
Next, a manufacturing method will be described based on FIG. The resin panel 2 is prepared by extruding the resin panel 2 in advance as a predetermined long member. The resin panel 2 is sufficiently cooled as a whole, and no heat is left during the extrusion molding.
[0018]
By passing the resin panel 2 between the pair of preheating heaters 5, only the surface portions on both sides of the resin panel 2 are preheated to near the melting point.
[0019]
On the other hand, while the metal sheet 4 and the adhesive film 3 are overlapped on the front and back sides of the resin panel 2, the metal sheet 4 is brought into contact with the heating rolls 7 having the heaters 6 in close proximity to each other. While heating as described above, the adhesive film 3 is attached to the metal sheet 4 using the temperature.
[0020]
Then, the metal sheet 4 to which the adhesive film 3 is adhered is put on the both sides of the resin panel 2 to be conveyed together with the resin panel 2 while the adhesive film 3 is placed on the resin panel 2 side. Is supplied between a pair of pressure rolls 8.
[0021]
The metal sheet 4 is bonded to both surfaces of the resin panel 2 via the adhesive film 3 by passing through the pressure roll 8.
[0022]
Thereafter, the resin panel 2 to which the metal sheet 4 has been joined is transported between the cooling rolls 9, where the surfaces of the metal sheet 4 and the resin panel 2 are cooled. The product 1 that has passed through the cooling roll 9 is pulled by a take-up roll 10 and transported to a storage location.
[0023]
When the product 1 wound up in a roll shape in this way was examined, it was found that the joining strength between the metal sheet 4 and the resin panel 2 was not uneven and was securely joined. Also, no deformation such as warpage or bending of the resin panel 2 occurred.
[0024]
【The invention's effect】
As described above, according to the present invention, the surface of the resin panel is heated only for a short time for bonding with the metal sheet, and is immediately cooled by the cooling roll. No problem occurs. Further, since the metal sheet can be continuously joined to the long and thick resin panel, there is no reduction in productivity.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a resin panel in which metal sheets are joined to both sides according to an embodiment of the present invention.
FIG. 2 is a view showing a manufacturing apparatus for joining a metal sheet to a resin panel according to one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Product 2 Resin panel 3 Adhesive film 4 Metal sheet 5 Preheating heater 6 Heater 7 Heating roll 8 Compression roll 9 Cooling roll 10 Pickup roll

Claims (3)

Preheat the surface of the resin panel to the melting point of the resin,
Laminate the adhesive film to the metal sheet heated above the melting point of the resin,
While overlapping the metal sheet with the adhesive film on the surface of the resin panel from the adhesive film side, transport the resin panel to a pressure roll, and continuously join the resin panel and the metal sheet,
Thereafter, the resin panel to which the metal sheet is bonded is transported to a cooling roll to cool the surfaces of the metal sheet and the resin panel, and a method of manufacturing a thick resin panel to which the metal sheet is bonded. It is a manufacturing method of the thick resin panel which joined the metal sheet of Claim 1, Comprising:
A method for manufacturing a thick resin panel in which metal sheets are bonded, wherein metal sheets are simultaneously bonded to both surfaces of the resin panel. It is a manufacturing method of the thick resin panel which joined the metal sheet of Claim 1 or Claim 2, Comprising:
A method for manufacturing a thick resin panel to which a metal sheet is joined, wherein the thickness of the resin panel is 7 mm or more and the thickness of the metal sheet is 0.1 to 0.5 mm.

Images