摘要:
A programmable, microprocessor-based controller is responsive to a displacement command signal and first and second transport signals corresponding to the distance that glass sheets (9) are conveyed on main and auxiliary conveyors (16, 17) respectively, to provide a speed control signal to a separate, variable speed drive (31). The variable speed drive drives the auxiliary conveyor independently of the driven main conveyor (16). The variable speed drive (21) is controlled by the controller to: (1) reduce the rate of glass sheet conveyance; (2) reposition the leading and trailing glass sheets if necessary, along the direction of conveyance; and (3) insure that as each glass sheet is transferred between the main conveyor (16) and the auxiliary conveyor (17), the auxiliary conveyor (17) is driven at the same speed as the main conveyor (16).
摘要:
A programmable, microprocessor-based controller is responsive to a displacement command signal and first and second transport signals corresponding to the distance that glass sheets (9) are conveyed on main and auxiliary conveyors (16, 17) respectively, to provide a speed control signal to a separate, variable speed drive (31). The variable speed drive drives the auxiliary conveyor independently of the driven main conveyor (16). The variable speed drive (21) is controlled by the controller to: (1) reduce the rate of glass sheet conveyance; (2) reposition the leading and trailing glass sheets if necessary, along the direction of conveyance; and (3) insure that as each glass sheet is transferred between the main conveyor (16) and the auxiliary conveyor (17), the auxiliary conveyor (17) is driven at the same speed as the main conveyor (16).
摘要:
A microprocessor-based control system for monitoring and controlling the processing of pairs of sheets of glass (6, 6') in a glass bending and tempering system. The glass sheets (6, 6') are conveyed by a horizontal roller conveyor (24) which is driven by a drive motor (36). The roller conveyor (24) conveys pairs of sheets of glass (6, 6') along the longitudinal length of an elongated heating chamber (18) to a bending station (22) where the glass sheets (6, 6') of each pair are simultaneously lifted by a bending apparatus (40). The glass sheets (6, 6') are controllably moved within the heating chamber (18) while on a plurality of rolls (26) adjacent the bending apparatus (40) independent of glass sheet conveyance on the other rolls of the conveyor. The control system (10) includes a photoelectric sensor pair (62) mounted on the conveyor for sensing the glass sheets (6, 6') as the glass sheets (6, 6') are conveyed by the conveyor (24). The photoelectric sensor pair (62) provides a glass sense signal to a control computer (88). An incremental encoder (56) coupled to the output shaft of the drive motor (36) provides a signal representation of the angular displacement of the output shaft to the control computer (88). The control computer (88) is programmed to respond to the glass sense signals and a transport signal of the encoder to provide control signals to coordinate the glass bending and tempering system including the bending apparatus and a roll operator.
摘要:
Process for bending and tempering glass sheets (V), especially thin sheets, characterized in that the glass sheet is submitted to the tempering phase while still being placed, as in the forming phase, on the forming ring 3 integral with a frame (2) which holds the latter, in order to maintain the previously assumed shape unaltered. Apparatus for carrying out said process, which also comprises means provided with vertical rise and fall movement, both in the forming zone and in the glass sheet discharge zone, preferably including a coupling device (8) - rotating screw with moving screw nut - which can support the frame (2) with forming ring (3) and the glass sheet (V) placed thereupon. The rolls (5, 5a) for the horizontal conveying of the glass sheet (V) provided in the forming and discharge zones, include a central section of constant length (B), and two side sections (B') whose length can be modified according to production requirements. Means (9, 10, 11) are also provided for conveying the frame (2) with integral forming ring (3) in the horizontal direction from the forming zones to the subsequent tempering and discharge zones, plus other overlying similar means (9', 10', 11') designed to return said frame (2) and forming ring (3) from the discharge zone to the forming zone, and lastly a passageway or chamber (14) suitably formed in the upper nozzle section of the tempering zone, through which may pass the frame (2) and forming ring (3), as well as their horizontal driving members (9', 10', 11') during the return traverse.