Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Chamber enclosing work during bonding and/or assembly
Patent
1993-12-02
1995-05-30
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Chamber enclosing work during bonding and/or assembly
156382, 156104, 156286, 156497, 156498, 156499, 156539, 34212, 219388, B32B 3120, B32B 3126
Patent
active
054197996
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY
The present invention relates to an air-exhausting and pre-pressing apparatus for laminated glass sheets. The apparatus includes substantially upright position on the conveyor. The apparatus further includes successively to define together a heating tunnel for carrying said conveyor therethrough. The apparatus also includes through the heating tunnel and provided with suction tubes that can be coupled with suction rings surrounding the edges of laminated glass sheets. The apparatus also includes ends fitted with blasting and suction ports on opposite sides of the heating tunnel for blasting the heating air between glass sheets, as well as
This type of equipment is generally used in the manufacture of laminated windscreens. Heating is used to provide a preliminary adhesion between glass sheets to be laminated and a plastic film therebetween while suction is applied to exhaust the air from between glass sheets. Heating mechanisms for glass laminates have been described e.g. in German publications DE 2 209 642, DE 2 050 033 and DE 2 241 754. A drawback in these prior known mechanisms is high energy consumption in relation to production capacity.
An object of the invention is to provide an improved apparatus capable of substantially saving heating energy while increasing production capacity and performing the heating and cooling of a glass sheet effectively and uniformly.
This object is achieved on the basis of the characterizing features set forth in the annexed claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference made to the accompanying drawings, in which
FIG. 1 shows an apparatus of the invention in a schematic perspective view;
FIG. 2 shows an apparatus of the invention in a side view and
FIG. 3 shows the apparatus of FIG. 2 in a plan view;
FIG. 4 is a schematic perspective view of a heating station included in the apparatus, illustrating the currents of heating air in an individual heating station; and
FIG. 5 depicts the coupling of a suction track with a suction ring at the edge of a glass sheet.
The Detailed Description apparatus shown in FIGS. 1-3 includes a preheating station 1, three heating stations 2 and a recooling station 3 set successively to define together a heating tunnel, through which the pairs of glass sheets to be laminated are carried in a substantially upright position by means of a conveyor 4. Conveyor 4 is provided with holding arms 5 for supporting the pairs of glass sheets in an upright position.
Adjacent to conveyor 4 is a suction track 6, which is also extended through the heating tunnel and whose suction tubes 16 (FIG. 5) can be coupled with suction rings 15 surrounding the edges of laminated glass sheets.
FIG. 4 shows in more detail an individual heating station 2. It includes air circulation ducts 14 which terminate in blasting ports or slots 12 on the ceiling of station 2 and in suction slots 13 on the floor. Thus, said blasting and suction slots 12, 13 are located on opposite sides of the heating tunnel for blasting the heating air through between glass sheets in vertical direction from top to bottom. For the circulation of heating air said duct 14 is fitted with a fan 10. In addition, duct 14 is provided downstream of fan 10 with electric resistance heating elements 11 for heating the air typically to a temperature of 140.degree. C. The temperature of pairs of glass sheets to be laminated in heating station 2 is typically raised to the range of 90.degree.-100.degree. C.
Preheating station 1 and recooling station 3 are linked with each other by at least two air circulation ducts 7 and 8, which by-pass heating stations 2 and whose blasting and suction slots are located in stations 1 and 3 on opposite sides of the heating tunnel. Ducts 7 and 8 are fitted with fans 9 for effecting the circulation of air from recooling station 3 to preheating station 1 and from preheating station 1 back to recooling station 3. Thus, the circulation air travels in both stations 1 and 3 in horizontal direction betwe
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Leponen Mauri
Lind Kalevi
Ball Michael W.
Lorin Francis J.
Tamglass Engineering Oy
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