US 4,064,729 AGranted

Metal forming device

OwnerAlex Homeryinventor

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Abstract

A device for achieving a continuous forming of a metal rod or bar as it emerges from an extruder to impart desired repeating design characteristics therealong. The device includes a pair of co-acting motor driven forming rollers with complementary design portions formed in their engaging peripheral surfaces to engage the rod therebetween and to impart the forming roller design thereto. The forming rollers and variable speed drive motor are mounted on a carriage trolley movable on a track toward and away from the extruder in alignment with the extrusion emerging therefrom. The piston rod of a pneumatic piston and cylinder assembly is fixed to the carriage to impart a predetermined degree of pressure thereto in alignment with and in the same direction as the pressure forces of the metal rod extrusion. The drive motor is operated at a predetermined R.P.M. to create a condition whereby the driven forming rollers engagement with the extrusion substantially counterbalances the combined P.S.I. forces of the extrusion and piston rod permitting the trolley carriage to drift back-and-forth on the track in accordance with normal fluctuating P.S.I. forces of the extrusion without imparting deforming forces to the extrusion.

Claims15

Dependent claims

A device for imparting a continuous decorative design to a metallic extrusion as it emerges outwardly from an extruder in a relatively soft condition in a continuous rod form along a generally straight path of travel, and under the influence of a predetemined range of fluctuating outwardly directed pressure forces, said device comprising,

an elongated fixed frame including track means in a generally parallel relation to the straight path and including a forward end adjacent the extruder and a rear end,
a carriage trolley including wheel means for engagement on said track means for movement toward and away from the extruder,
upper and lower forming rollers, having one-to-one ratio, rotatably mounted on said carriage trolley in a peripheral rolling engagement with each other, at least one of said rollers being peripherally grooved with desired design characteristics formed in said groove, said forming rollers being positioned for passage of the continuous rod therebetween through said groove as it emerges from the extruder to impart the cross sectional shape of said groove and said design characteristics along the length of said extrusion,
means to exert a predetermined amount of outwardly directed pressure forces against said carriage trolley,
means to drive said forming rollers in predetermined opposite directions at alike predetermined numbers of revolutions per minute to substantially counter the combined outwardly directed forces of the continuous rod extrusion and said means to exert while permitting said carriage trolley to drift sequentially forwardly and backwardly in direct response to decreasing and increasing force fluctuations.

2 more elements

Dependencies are inferred from the claim text.