| 摘要 |
A composite insulating panel comprises an external metal skin (1), an internal metal skin (2) and an insulating core (3) of phenolic foam between the skins (1,2). The panels are manufactured by first conveying one of the metal skins (1) continuously along a flat bed (30), pre-treating at least a portion of the first skin, laying down liquid phenolic insulating foam reactants onto the first skin through a lay-down device such as a poker (35), pre-treating at least a portion of the second skin (2), leading the second metal skin (2) continuously over the liquid foam insulating foam reactants and the first metal skin (1), heating the assembly in an oven to allow the reactants to expand to form an insulating core, heating the marginal edges of the panel and cutting the panel to a desired length. The pretreatment may be heating such as by IR lamps (45) and/or application of adhesive. A coating such as a primer may be applied to one or both of the skins prior to lay-down of the foam reactants. The skins may be spaced apart by spacer blocks. A sealing tape may be applied to a panel edge after cutting. |
