Method of and apparatus for lining a pipe insulating shell consisting of mineral fibers with a foil
First Claim
1. A method of lining a pipe insulating shell formed of mineral fibers with a foil having a coating of heat activatible adhesive, comprising the steps of:
- pre-positioning a free end of said foil with a downward angled orientation;
resting a leading edge of said free end of said foil on the upper surface of a heating roller positioned below a pipe insulating shell, whereby said adhesive is preliminary activated at said leading edge;
moving said roller towards said shell until said leading edge of said free end of said foil bears on said shell;
maintaining said leading edge pressed against said shell by said roller for a first dwell period; and
separately rotatably driving said shell and said roller in opposite directions and with the same peripheral speed to line said foil on said shell.
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Accused Products
Abstract
For all-over lining of a longitudinally slit pipe insulating shell consisting of mineral fibers, with a foil having a coating of a heat activatable adhesive, a fully automatic process uses the steps of bringing the foil into a preliminary position with its end portion bent over downwardly by means of a rail, subsequently moving the foil into a position of readiness in which its outer edge comes to bear on a vertically adjustable heating roller, so that an initial activation of the adhesive starts to take place, then raising the heating roller to the pipe insulating shell and permitting it to remain in this adhering position for a brief period, and finally carrying out the actual lining operation by rotating both the heating roller and the pipe insulating shell at the same peripheral speed, and in opposite direction by means of a winding mandrel.
41 Citations
12 Claims
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1. A method of lining a pipe insulating shell formed of mineral fibers with a foil having a coating of heat activatible adhesive, comprising the steps of:
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pre-positioning a free end of said foil with a downward angled orientation; resting a leading edge of said free end of said foil on the upper surface of a heating roller positioned below a pipe insulating shell, whereby said adhesive is preliminary activated at said leading edge; moving said roller towards said shell until said leading edge of said free end of said foil bears on said shell; maintaining said leading edge pressed against said shell by said roller for a first dwell period; and separately rotatably driving said shell and said roller in opposite directions and with the same peripheral speed to line said foil on said shell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for lining a pipe insulating shell formed of mineral fibers with a foil having a coating of heat activatible adhesive, comprising:
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a pipe insulating shell loading station comprising; (a) an elongate receiving mandrel having a central slot, (b) transport arm means for moving a shell in the longitudinal direction of said receiving mandrel and onto said receiving mandrel, and (c) cutting means in said central slot for forming a continuous longitudinal slit in a shell being mounted onto said receiving mandrel;
a shell winding device comprising;(d) an elongate winding mandrel coaxial with said receiving mandrel and including means for connecting to an end of said receiving mandrel, said winding mandrel further including a radially projecting guide strip, (e) means for rotating said winding mandrel, and (f) means for moving said winding mandrel into abutment with said receiving mandrel such that said connecting means can connect said receiving and winding mandrels, wherein said transport arm means includes means for moving a slitted shell onto said winding mandrel, whereby said guide strip fits in said slit;
a lining station comprising;(g) a heating roller extending below and parallel to said winding mandrel; (h) means for vertically moving said heating roller, and (i) means for rotating said heating roller; and means for feeding a foil to said lining station, comprising; (j) a bar positioned laterally of said lining station and pivotally mounted on an axis parallel with said heating roller. - View Dependent Claims (10, 11, 12)
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Specification