Patent GB-844225-A (GB)
Title: Machine for working the edges of veneers
Inventor: PALM HERMANN
IPC: B27L5/08
Filed: 1958-06-16
Abstract: 844,225. Planing. TORWEGGE, F. June 16,1958, No. 19162/58. Class 145. A veneer edge-smoothing machine comprises clamping beams 10, 11 rotatable about a longitudinal axis to permit smoothing the edges on two sides of the pack by at least one tool 5 and a support table 20 for aligning the edges of the veneer pack, the table being removable from the path of the tool by a linkage 21 operated by a compressed air actuator 22. The clamping beam 11 is movable hydraulically and both beams are rotatable about a horizontal axis in the journals 12, 13 by an electric motor 16. A tiltable carrier table 23, Fig. 6, fed by a conveyer belt 30 and having a clamping bridge 26 may be positioned vertically over the clamping beams 10, 11 and the pack dropped onto the table 20, a shaking device (not shown) being operated before clamping. When the table 20 is lowered to a predetermined position a switch 29 is closed to start the rough and finishing planing tools 5, 6 followed by a glueapplying device 8, all of which are mounted ona transversely adjustable carrier 4 and driven by a motor 7. At the end of its travel the toolcarrier operates a stop-switch 32, when the pack is rotated by the motor 16 as the motor 7 and the planing tools are moved transversely out of the plane of cutting and are returned to the opposite end of the pack, contacting a stopswitch 33. As the table 20 is again lowered, after levelling the pack 52, the switch 29 is closed and the cycle is repeated. At the end of the second planing operation the motor 16 is operated to rotate the pack in the reverse direction through 90 degrees by suitably adjusting a cam-disc 17 the beams 10, 11 are opened and a pusher device 34, Fig. 6, transfers the worked pack to a delivery table 35 and a conveyer belt 36 coacting therewith. As the pusher 34 is withdrawn the beams 10 and 11 are again turned through 90 degrees ready to receive a further pack. In a modified construction a feeding device is arranged on the intake side of the machine having a support 39, Fig. 8, which may be swung from a vertical, loading, to a horizontal, feeding, position by actuators 41. A carriage 42 slidable on the support 39 is provided with grid bars 49, 49a and has a supporting surface 50. A motor-driven cam shaft 46 actuates the pins of a shaker which brings the veneer edges into contact with the surface 50, when the bars 49 are moved by pressure in cylinders 49b to hold the veneers against bars 49a. The carriage 42 when horizontal is moved forward by a pressure cylinder to bring the veneers between the clamping beams 10, 11 the bars 49a then being slightly raised by cams on a cam shaft 43 carrying a pinion which meshes with a rack 44. Shortly before the carriage 42 reaches the limit of its forward travel the inner end of the rack abuts the beam 10, but, as the carriage moves on, the cam shaft is rotated and the bars 49a are lowered to deposit the veneers on the beam 10; as the carriage is withdrawn the opposite end of the rack contacts an abutment and the bars 49a are again raised, the support 39 is moved to its vertical position and is ready for a further pack. A similarly operated grid and rack system is mounted on a carriage 53 on the delivery side of the machine.