US2214160A - Scrap chopper with a blade having a combined rotary and reciprocating motion - Google Patents

Description

p 10, A. R. CARR 2,214,160

SCRAP CHOPPER WITH A BLADE HAVING A COMBINED ROTARY AND RECIPROCATING MOTION Filed July 22, 1938 2 Sheets-Sheet l p 1940- A. R. CARR 2,214,160

SCRAP CHOPPER WITH A BLADE HAVING A COMBINED ROTARY AND RECIEPROCATING MOTION Fil ed July 22, 1958 2 Sheets-Sheet 2 Patented Sept. 10, 1940 SCRAP CHOPPER A BLADE HAVING A COMBINED ROTARY AND BECIPRO- CATING MOTION Arthur Robert Carr, Gary, Ind. Application July 22, 1938, Serial No. 220,817

3Claims. (Cl.'164-68) The present invention relates to a reciprocating scrap chopper.

An object of this invention is to provide a 'cutting mechanism-for metallic scrap material in which the cutting may be done over a considerable length of the knife.

Another object of this invention is to control the reciprocating movement of the scrap chopper.

Other objects andadvantages will become apparent from the description, when read in connection with the accompanying drawings, in which:

Figure 1 is a p n of the present invention; Figure 2 is a side elevation of the showing in Figure 1;

Figure 3 is asection on'line BIL-Ill. of Figure Figure 4 is a section'on line IV-IVof Figure Figure 5 is a side elevation of the scrap chopper adjustment head; and,

Figure 6 is an end view of the showing in Figure In the drawings. the numeral 2 represents a 26 conventional type of side-trimming shear provided with conventional type of cutting knives 3 adapted to trim the edges of strip and the like material.

The scrap chopper of the present invention, which is used in conjunction with a conventional type of side-trimming shear 2, comprises a stationary cutter knife 4 and a rotary cutter knife 5. Mounted upon a base 6, and secured thereto, is a. bed-plate I having an upwardly extending flange 8 and tongue member 9, upon which a slide.

plate In is adapted to move back and forth. The slide plate I! is provided with a flange l2 adapted to slide on the base plate 1 and a groove ll adapted to slide on said tongue member 9.

4o Rigidiy secured. in any desired manner, to the side plate I0 is a housing l5 which supports the stationary and rotary cutterblades, in any con- ;ventional manner. A spline shaft l3, receiving power from a main drive shaft i'l, drives the 5 rotary cutter knife 5 and is mounted in suitable bearings ll, of' conventional design, between which is supported a pulley-wheel l9 having grooves to receive the V-belts' 20 to receive power fronrthe pulley-wheel 2|, which is mounted on 50 a power shaft 22. A sprocket-wheel 23 mounted upon the end of said shaft 22 is connected by sprocket chain 24 to asprocket-wheel 25 mounted on a shaft 26 of a speed reducer unit 21.

v A low speed shaft 23 extends from the speed 55 reducer and has keyed .01 otherwise secured thereon a face plate 29. The face plate, 29 is provided, on one face thereof,, with a groove 33 within which is adapted to slide, upon an adjusting screw 3|, a block 32. Extending from said block 32 is a crank-pin 33 on which is pivotally 6 mounted a connecting-rod 34. said connectingrod being pivotally connected at its other end to said housing -l5. r

The reciprocating housing i5 is provided on the side adjacent the cutting knives 3 with a 10 transversely extending elongated opening or guideway 35. Rigidly secured, in any conventional manner, within the guideway 35 is a boxlike member or guide extending upwardly from the reciprocating housing I! to a point adjacent 15 the edge of the cutting knives 3 in order that the scrap material coming from the edges of the sheet or plate will be positively guided into contact with the scrap chopper.

The operation of the present invention is a follows: v

As strip material is fed to the trimming shear 2, the knives 3 shear or cut oil! the edges of the strip or material to the desired width, and the scrap from the edges passes through a box-like a guide member 40 into the guideway 33 into contact with the scrap chopper. The scrap material is then cut up into short lengths or pieces by the rotation of cutter blades 5 coacting with the stationary cutter blade 4. The speed reducer 3 unit, receiving power throughythe chain and sprocket mechanism. 23, 24 and 2I, drives the shaft '23 carrying the face plate 23, and, due to the movement of the crank pin 33 mounted'on the adjustable slide bliflk 32, moves the con- 35 necting-rod 3| and the housing l6 containing the rotary and stationary cutter blades back and forth across the path of the scrap material coming from the side-trimming shear 2. This reciprocating movement of the scrap chopper 4 permits cutting of the scrap material over a considerable length of the knife, and greater service is obtained from the knives between the periods necessary for grinding. j By adjusting the screw 3|, the extent of the reciprocating movea meat of the scrap chopper is controlled in that movement of the adjusting screw 3| produces a movement of'said block 32 thereon with the result that the connecting-rod 34, which is pivotally connected to the crank pin 33 and the housing I! regulates the reciprocating movement of the scrap chopper and aflords an opportunityof varying, over a wide range, the points to which the scrap material will be engaged 'by the coacting rotary cutter and stationary cutter blades. 3

In the scrap chopper now in use, the blades have no reciprocating movement and the scrap material contacts the cutter blades at substantially the same point all the time, which results in theknives becoming dull at the point of cutting. This requires considerable expense incident to resharpening oi the knives. Under the present invention, these difliculties are over- In a construction as hereinabove described, the reciprocating chopper unit is located very close to the cutting knives 3 and, due to this decrease in the distance between the cutting knives and the scrap chopper unit, whipping movement oi the material is minimized and cobbling oithe scrap material is prevented thereby. This eliminates any tendency to burn the cutting knives 3 due to the possibility of cobbling of the scrap material.

I fixed and rotary cutter blades supported by said carriage and movable therewith transversely of the scrap, whereby wear on the cutter blades is distributed over a considerable portion of the length thereof so that the frequency of resharpening said cutter blades is minimized.

2. The combination with a side-trimming effective to cut off an elongated piece of scrap from material ted thereto, of means for chopping said scrap into smaller pieces comprising a carriage, means for adjustably reciprocating said carriage transversely of the line of travel of the scrap ejected by the shear, coacting fixed and rotary blades supported by the carriage and movable therewith transversely of the scrap, whereby wear on said cutter blades is distributed over a considerable portion thereof so that the frequency of resharpening said cutter blades is minimized.

3. The combination with a side-trimming shear effective to cut on an elongated piece of scrap from material ted thereto, of means .ior chopping said scrap into smaller pieces comprising a carriage movable transversely of the line of travel of the scrap ejected by said shear, coacting fixed and rotary cutter blades supported by said carriage and movable therewith transversely of the scrap, whereby wear on the cutter blades is distributed over a considerable portion of the length thereof so that the frequency of resharp-- ening said cutter blades is minimized, the parts being so constructed and arranged that the rotary blade of the scrap chopper turns on an axis substantially parallel with the plane of the material being cut.

ARTHUR ROBERT CARR.

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