Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Patent
1993-04-15
1995-06-20
Osele, Mark A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
156264, 156355, 156361, 156517, 156558, 156584, B26D 528
Patent
active
054258340
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to an automatic feeder of adhesive sheet material suited to supply of adhesive sheet material, for example, sheet molding compound as forming material for manufacturing reinforced plastic product, to a forming machine.
BACKGROUND OF THE INVENTION
Hitherto, sheet molding compound (SMC) has been widely used as the forming material for manufacturing reinforced plastic products such as bath tubs. This SMC is prepared by mixing liquid unsaturated polyester resin and reinforcing material such as chopped strand, filler, and thickener, and forming in a sheet by decreasing its moisture content thereby becoming adhesive. Accordingly, as shown in FIG. 26 and FIG. 27, the SMC 10 is usually formed in an SMC sheet 12 covering its upper surface and lower surface with a polyethylene or other parting film 11 broader than the width of the SMC 10, and is wound around a core tube 14 to be formed in an SMC roll 13, or folded in a pleated form which is not particularly shown.
Forming of a reinforced plastic product from such SMC comprises the step of cutting out a necessary portion for one forming from the SMC sheet, feeding the cut segment of SMC into the forming machine, heating and pressurizing the SMC segment in the machine, and curing.
In this process, until the SMC is supplied to the forming machine, the SMC undergoes a step of peeling off the upper and lower parting films from the SMC sheet 12 let off from the SMC roll 13 and cutting the SMC to a specific length, a step of transferring the obtained segment of SMC to a weighing device, a step of weighing to see if the weight of the SMC segment has reached a specific weight necessary for forming, and a step of charging the weighed segment of SMC into the forming machine.
In the step of cutting the SMC sheet, conventionally, a sheet cutter 800 as shown in FIG. 28 has been used. The sheet cutter 800 comprises a receiving stand 801 for rotatably pivoting the core tube 14 of the SMC roll 13, a pair of pinch rolls 802, 802 for pinching the SMC sheet 12 supported and pulled out from the receiving stand 801 from above and beneath and letting off to the downstream side, take-up rolls 803, 803 for taking up the peeled parting films 11, 11 at the let-off side of the pinch rolls 802, 802, and a cutting blade 804 for cutting the SMC in the widthwise direction (the direction orthogonal to the sheet of paper in FIG. 28). The SMC sheet 12 is pinched by the upper and lower pinch rolls 802, 802, and is let off to the downstream side as they are simultaneously rotated and driven in mutually opposite directions, while the cutting blade 804 fixed to a holder 805 is run in the widthwise direction of the SMC 10 to cut it sequentially into segments 15.
In FIG. 28, meanwhile, numeral 806 denotes a connection table, 807 is a guide moll for leading the SMC sheet 12 onto the connection table 806, and 900 is a cut sheet conveyor for conveying the segment 15 of the SMC 10 supplied from the sheet cutter 800 to a specific position.
Besides, in the step of transferring the SMC segment obtained by the sheet cutter to the weighing device, handling is difficult because the SMC is adhesive, and therefore since the segment cannot be sent into the specified position of the weighing device without damaging by general conveying equipment, conventionally, the segment of SMC was manually transferred from the cut sheet conveyor to the weighing device.
In the weighing step, the weight of the SMC supplied to the forming machine must be accurately determined according to the reinforced plastic product to be formed, or the reinforced plastic products cannot be manufactured in specified weight balance. For this purpose, for example, a weighing method was purposed in the Japanese Laid-Open Patent (KOKAI) No. H02-121811. That is, the SMC necessary for one product is successively cut in specific length, and each cut segment of SMC is weighed, while the weights are cumulatively added up, and in the final cutting step, the cutting length of the final segment is increas
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patent: 5000816 (1991-03-01), Seki et al.
patent: 5045250 (1991-09-01), Brussel
Kawamori Koichi
Kojima Masashi
Narimatsu Toru
Shinohara Masaru
Osele Mark A.
Sekisui Kagaku Kogyo Kabushiki Kaisha
Tsukishima Kikai Kabushiki Kaisha
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