| 摘要 |
A method of forming a foam-filled decorative muntin bar includes the steps of roll-forming a sheet of aluminum to form a hollow outer shell, and depositing a mixture of foaming components on the sheet of aluminum as it is being roll-formed, so the outer shell encases the mixture. The mixture is allowed to react, expand and harden to form a foamed material that substantially fills the shell. The filled shell is cut to form a segment of a foam-filmed decorative muntin bar of desired length with open ends.
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