Calendering aluminum profiles for producing spacer frames for insulating glazing units
AssigneeFor.El. Base di Vianello Fortunato & C. S.n.c.
InventorsFortunato Vianello, Dino Moschini
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Abstract
An automatic method and device for calendering aluminum profiles for producing spacer frames for insulating glazing units, the method consisting in producing calendering by preliminarily deforming the surface on which minute holes are formed so as to obtain an inside curve. A consecutive plurality of minute bends, the pitch increment whereof tends to zero and the bending angle increment whereof tends to zero, is then performed at an automatically controlled microbending station.
Claims14
In combination a bending machine for bending profiles for insulating glazing unit spacer frames, the profiles having a perforated surface on which minute holes are formed and perimetric edges between which said perforated surface extends, the machine including:
- feeding means for feeding a profile along a working flow path at an automatically controllable pitch increment;
- a bending station;
- a rotation arm;
- and a calendering device, said rotation arm cooperating with said bending station and said calendering device for imparting to the profile a desired bending angle,
- and said calendering device comprising:
- a curving means for producing a preliminary cross deformation of said perforated surface so as to obtain between said perimetric edges an inside curve;
- and
- an automatically controlled microbending station for forming on said profile, in cooperation with said rotation arm a number n of minute bends in which an increment of a bending angle .alpha. tends to zero and an increment in a bend pitch p tends to zero, said microbending station being located along said working flow path, downstream of said curving means, and immediately upstream of said bending station;
- and wherein said bending station comprises punching means for acting on said profile, during operation of said microbending station, at said perimetral edges for preventing undulation thereof.
In combination a bending machine for bending profiles for insulating glazing unit spacer frames, the profiles having a perforated surface on which minute holes are formed and perimetric edges between which said perforated surface extends, the machine including:
- feeding means for feeding a profile along a working flow path at an automatically controllable pitch increment;
- a bending station, said bending station comprising punching means for acting on said profile at said perimetral edges;
- a rotation arm;
- and a calendering device, said rotation arm cooperating with said bending station and said calendering device for imparting to the profile a desired bending angle,
- and said calendering device comprising:
- a curving means for producing a preliminary cross deformation of said perforated surface so as to obtain between said perimetric edges an inside curve;
- and
- an automatically controlled microbending station for forming on said profile, in cooperation with said rotation arm a number n of minute bends in which an increment of a bending angle .alpha. tends to zero and an increment in a bend pitch p tends to zero, said microbending station comprising a vice which is located along said working flow path, downstream of said curving means, and immediately upstream of said bending station, said vice having lateral walls for gripping therebetween the profile, said punching means acting on said profile for achieving calendering thereof by forcing said perimetral edges to remain adherent to said lateral walls of said vice during operation of said microbending means.
Dependencies are inferred from the claim text.