Apparatus for bending lamellar workpieces

• US 5,326,249 A
• Filed: 10/25/1993
• Issued: 07/05/1994
• Est. Priority Date: 05/10/1990
• Status: Expired due to Fees

• Current Assignee: Wegener GmbH
• Original Assignee: Wegener GmbH
• Inventors: Weissfloch, Reinhard
• Primary Examiner(s): Simmons, David A.
• Assistant Examiner(s): MATNEY JR, WILLIAM
• Application Number:
  US08/140,987
• Time in Patent Office: 253 Days
• Field of Search: 72/383, 72/386, 72/387, 72/389, 72/420, 156/443, 156/581, 264/295, 264/339, 425/383, 425/394
• US Class Current: 425/383
• CPC Class Codes: B29C 53/04 of plates or sheets B29C63/04 takes precedence; bending or folding paper B31F1/0003; folding films B65H45/00
• CPC Class Codes: B29K 2105/06 containing reinforcements, fillers or inserts

Abstract

A machine for bending reinforced thermoplastic workpieces includes a machine frame. First and second spaced rest plates are mounted to the frame, with the plates having a first planer orientation, which define a rest plane, for supporting a workpiece and a second angularly disposed orientation for bending the workpiece. A compression rest is disposed between the plates. A heated bending beam is in alignment with and spaced from the compression rest. A drive system is operably associated with the frame for causing relative movement between the beam and the plates and the rest, so that a workpiece supported by the plates and the rest in the first orientation may engage the beam. The plates are operably interconnected for therefore defining a common pivot axis. A system is provided for causing at least one of the plates to be pivoted about the pivot axis. A further system is operably associated with the plates when in the first planer orientation for adjusting the plates relative to the common pivot axis so that the rest plane may be selectively positioned relative to the common pivot axis prior to a workpiece on said plates being engaged by the bending beam.

Claims

1. Machine for bending reinforced thermoplastic workpieces, comprising:

a) a machine frame;

b) first and second spaced rest plates mounted to said frame, said plates having a first planar orientation, defining a rest plane, for supporting a workpiece and a second angularly disposed orientation for bending the workpiece;

c) a compression rest disposed between said plates;

d) a heated bending beam in alignment with and spaced from said compression rest;

e) a drive system operably associated with said frame for causing relative movement between said beam and said plates and said rest so that a workpiece supported by said plates and said rest in said first orientation may engage said beam;

f) means operably interconnecting said plates for defining therefor a common pivot axis;

g) means operably associated with said plates for causing at least one of said plates to be pivoted about said axis; and

h) means operably associated with said plates when in said first planar orientation for adjusting said plates relative to said common pivot axis so that said rest plane may be selectively positioned relative to said common pivot axis prior to a workpiece on said plates being engaged by said bending beam.

2. The machine of claim 1, wherein:

a) said bending beam has a heater blade.

3. The machine of claim 2, wherein:

a) said blade has a planar contact surface.

4. The machine of claim 2, wherein:

a) said blade has an arcuate contact surface.

5. The machine of claim 1, wherein:

a) said rest includes a heater.

6. The machine of claim 5, wherein:

a) said rest has a concave contact surface for the workpiece.

7. The machine of claim 5, wherein:

a) said rest includes a compression strip supporting the workpiece.

8. The machine of claim 7, wherein:

a) said strip is formed of rubber.

9. The machine of claim 1, wherein:

a) said drive system is operably connected to said plates and said rest for causing cooperating movement thereof relative to said beam.

10. The machine of claim 9, wherein:

a) said drive system includes a pressurizable cylinder and piston assembly.

11. The machine of claim 10, wherein:

a) a compression beam is mounted within said frame, and said plates and said rest are operably connected to said compression beam; and

b) said cylinder and piston assembly is operably connected to said compression beam so that operation thereof causes movement of said compression beam and thereby of said plates and said rest.

12. The machine of claim 1, wherein:

a) said common axis is located in the plane defined by said plates when in said first orientation.

13. The machine of claim 1, wherein:

a) each of said plates has spaced side edges; and

b) said interconnecting means operably interconnects said plates at each of said edges.

14. The machine of claim 13, wherein:

a) said interconnecting means includes a pivot lever connected to said of said plates at each of said side edges; and

b) means are operably associated with said levers for causing movement thereof relative to the associated plates for thereby setting said common axis relative to the workpiece.

15. The machine of claim 1, wherein:

a) said causing means includes a cylinder and piston assembly operably connected to each of said plates.

16. The machine of claim 11, wherein:

a) first and second outwardly projecting brackets are connected to said beam, each of said brackets is operably associated with one of said plates; and

b) said causing means includes a cylinder and piston assembly for each of said plates, each of said cylinder and piston assemblies is operably associated with one of said brackets and has an extensible portion thereof engaged with the associated plate for causing pivoting thereof.

17. The machine of claim 16, wherein:

a) limit means extended from each of said brackets and are connected to each of said plates for limiting pivoting thereof.

18. The machine of claim 17, wherein each limit means includes:

a) a guide sleeve pivotally supported by an associated one of said brackets;

b) a threaded rod having a first end connected to an associated one of said plates and an opposite end carrying a nut; and

c) each rod passing through the associated sleeve so that engagement of the nut with the sleeve prevents further movement thereof and thereby of the associated plate.

19. A machine for bending thermoplastic composites, comprising:

a) a machine frame;

b) a workpiece rest comprising first and second spaced plates, said plates having a first planar horizontal orientation defining a rest plane;

c) a heater blade mounted to said frame and spaced vertically relative to said plates when in said first orientation;

d) a compression rest disposed between said plates in alignment with said blade;

e) drive means operably associated with said frame for causing relative movement between said plates when in said first orientation and said blade so that a workpiece supported by said plates may engage said blade;

f) said plates pivotal about a common pivot axis;

g) said drive means adapted for pivoting at least one of said plates relative to said axis for thereby causing a workpiece engaged with said blade to be bent to a predetermined angular orientation; and

h) means operably associated with said plates for, when in said first orientation, adjusting said plates vertically relative to said common pivot axis so that said rest plane may be selectively positioned relative to said common pivot axis prior to a workpiece resting upon said plates being engaged by said blade.

20. The machine of claim 19, further comprising:

a) means operably associated with each of said plates for setting said axis relative to the workpiece.