摘要:
An apparatus and method for continuously stretching a web of thermoplastic sheet into an arcuate form of desired curvature for the manufacture of laminated windshields. The apparatus includes conventional heating rolls, but employs at least two adjustable multispoke pyramids, one hot setting pyramid and one cooling pyramid which are separated by a wall incorporating a folding bar. The method relates to the manufacture of cut shaped blanks wherein hot setting and cooling steps are physically separated. Residual snap back after hot setting is released prior to the cooling step.
摘要:
An automatic cutting and stacking device for arcuately shaped blanks is disclosed. The device contains a feeding table followed by a cutting unit and a stacking device. The cutting unit is movable in relation to the feeding table to thus allow a cutting perpendicular to the contour of the shaped film. The stacking unit comprises a slide plate and a movable base plate upon which the cut blanks are stacked. The height of the base plate can be adjusted/lowered in relation to the accumulating thickness of the stacking height of the cut blanks.
摘要:
An apparatus for continuously stretching a web of thermoplastic sheet into an arcuate form of desired curvature for manufacturing laminated windshields. The apparatus comprises conventional heating rolls, but employs at least two adjustable multispoke pyramids, one hot setting pyramid and one cooling pyramid which are separated by a wall incorporating a folding bar.
摘要:
A process for relaxation of interlayer sheet is provided which comprises heating the interlayer sheet, followed by leading the heated interlayer sheet over an air-cushion table with regulation of the tension on the interlayer sheet to induce interlayer sheet relaxation and thereafter cooling the relaxed interlayer sheet to the desired temperature for subsequent use. Apparatus suitable for carrying out the process of interlayer sheet relaxation comprising a heating section, an air-cushion table, a tension control and a cooling section is also provided in accordance with the present invention.
摘要:
Film treatment surface provided with a propulsion system for circularly contoured film (5) along a circular path are disclosed. The essential propulsion and steering system is represented by two adjustable disks (2, 3), one being equipped with a propulsion wheel and a steering mechanism whereas the second disk embodies an idler wheel and a steering mechanism. The treatment surface was found to be beneficially suitable for the manufacture of cut shaped blanks made from shaped films of plasticized polyvinyl butyral. The blanks can be used in automobile windshields.