Resin-made sandwich panel and manufacturing method of resin-made sandwich panel

Abstract

Provided is a resin sandwich panel (10) capable of securing necessary rigidity without causing molding defects while maintaining an attractive appearance. A sandwich panel (10), comprising: two resin skin material sheets (12) and a resin core material (13), the resin core material (13) being inserted between the two skin material sheets (12) The method is respectively bonded to the two skin material sheets (12), and the resin sandwich panel (10) is characterized in that the two resin skin material sheets (12) are formed internally by joining each other at their peripheral edges. a hollow part, the resin core material (13) is arranged in the hollow part, and at least one side of the surface of the resin core material (13) opposite to the two resin skin material sheets (12) A groove (93) and a depression (89) are provided on it, wherein, the surface of the groove (93) is entirely surrounded, and the depression (89) communicates with the groove (93), and, in At least one of the two resin skin material sheets (12) is provided with an atmosphere-opening through hole (94) communicating with the groove portion (93) along the thickness direction, so that in the hollow portion, when the When the at least one surface of the resin core material (13) is bonded to the corresponding resin skin material sheet (12), the at least one surface and the corresponding resin skin material sheet (12) The air in between is guided to the recessed part (89) through the groove part (93), and is exhausted from the atmosphere-opening through hole (94).

Description

technical field [0001] The present invention relates to a resin sandwich panel, and more specifically, to a resin sandwich panel capable of securing necessary rigidity without causing molding defects while maintaining an attractive appearance. Background technique [0002] In the past, so-called sandwich panels have been widely used in transportation machinery such as automobiles and aircrafts, building materials, floors of lathes, casings of electrical equipment, sports, and leisure. A sandwich panel has two sheets of skin material and a core material sandwiched between the two sheets of skin material. A laminated structure including a skin material sheet, a core material, and a skin material sheet is the basic form of a sandwich panel, but the functional requirements of the sandwich panel vary depending on the application. For example, for interior panels used in bathrooms, the aesthetic appearance is important, but the strength is not high. In this case, a decorative mat...

AI Technical Summary

Problems solved by technology

Therefore, when the divided mold is closed with the resin core material 13 inserted, the closed space inside the mold is pressurized, and thus, if there is an air pool between the surface of the resin core material 13 and the opposing thermoplastic resin sheet, Clamping the mold tends to cause internal pressure to rise and cause expansion to expand the area of ​​the air pool, and at the same time, peeling occurs between the surface of the resin core material 13 and the facing thermoplastic resin sheet, which is easy to cause welding peeling, so Causes poor forming, even if it does not cause poor forming, the overall rigidity of the resin sandwich panel will be reduced due to insufficient welding

[0008] Second, there is a problem of damaging the appearance of the resin sandwich panel

Therefore, it is technically difficult to close the split mold after eliminating such an air pool in advance.

[0010] Third, due to the sandwich panel forming method, it is difficult to obtain good quality sandwich panels

However, as the expansion ratio increases, especially when extrusion molding or injection molding is used, it is difficult to adjust the expansion ratio, so it is difficult to obtain the desired quality

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