US1364183A

US1364183A - Take-off mechanism fob bubbeb mixing mills

Info

Publication number: US1364183A
Authority: US
Publication date: 1921-01-04
Anticipated expiration: 1938-01-04

Description

S. DIETR1 CH.- TAKE-OFF MECHANISM FOR RUBBER MIXING MILLS.

APPLICATION FILED APR. 4 I913 Patented Jan. 4, 1921.

is SHEETS-SHEET SebaSf/an Diet/7th M mwwo APPLICATION FILED APR. 4. I918.

Patented Jan. 4, 1921. I

a snesrs-$uzsr 2.

QHIOW e1 DIETRICH.

TAKE-OFF MECHANISM FOR RUBBER MIXING MILLS.

APILICATlQh FILED APTL4 1918. 1,364,183, Patented Jan. 4, 1921.

3 SHEETS-SHEET 3- UNITED STATES] PATENT, I

SEBASTIAN DIETRICH,-,OF CUDAHY,-:WIS COI TSIN.

TAKE-OFF oHaNIsM'roR numam mrxme inns.

Specification of LettersTatent.

Application filed April 4., 1918. 1 Serial 110,226, 26.

To all whom it may concern:

Be it known that I, SEBASTIAN DIETRICH, a citizen of the United States, residing at Cudahy, in the county of Milwaukee, State substantially of Wisconsin, have invented certain'new and useful Improvements in Take-Off Mechanism for Rubber-Mixing Mills, of which I declare the following to be a full, clear, and

exact description. r f

This invention relates to, an automatic take-off mechanism for rubber mixing mills."

Further objects, and objects relating to economies of manufacture and details of construction, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. My invention is clearly defined and pointedout in the 31p.

pended claims.

A structure constituting a preferred ambodiment of my invention is illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is a top plan view showing a portion of a rubber mixing mill with a take oif mechanism embodying my invention connected thereto.

Fig. II is a sectional view taken on the line IIII of Fig. I and showing the takeoff mechanism in side elevation.

Fig. III is a fragmentary, detail, sectional view takensubstantially on the line IIIe-III of Fig. I.

Fig. IV is an enlarged view of the upper end of Fig. II, the conveying belt not being.

shown. 7

Fig. V is a detail, sectional View, taken on the line V V of Fig. III,

and,

ri v1 is a rmgmena1-y, demi1, sectional v ew taken substantially on the line VI-VI of Fig. V. 7

refer to similar parts throughout the several Patented am 1, 1921. 1

In the drawings,similar reference numerals I views, and the sectional views are takenloolo ing inthe direction ofthe little arrows at the ends of the section lines.

In rubber mixing mills there are provided,

customarily, a pair of squeeze rolls 11 and 12 which are driven in' opposite directions and suitably'journaled in the mill frame 10. The mgredients of the ,batchfto be mixed are dumped between the squeeze rolls and are thoroughly mixed bythe action of the squeeze rolls, as they carry 'a thin sheet of the mixed stock around between the rolls,

which sheet adheres to the surface of the rolls so 'as'to form a sheet'of stock'coating' the squeeze rolls. This sheet of stock is re peatedly removed from the rolls and rolled up into a bundle and dumped between the until the batch isthoroughly mixed and the ried in a sheet adhering to the rolls, g

V Heretofore, it has been the practice for the operator to-manually 'sever'a stripfof approximately the desired width'by the use squeeze rolls once more'torepeat the process mixed stock is ready to be'removed from the 4 rolls of themixing mill on which it is car- I of a knife and for his assistant to pull the continuous strip from the roll by hand into a suitable container which receives the strip, dusting the strip with powdered soap stone,

as he does this, in order to prevent portions of the rubber strip adhering to each other. i

The result is that the strip removed varies in width, as the operator does not always apply his knife at thesame point to the" roll. Astrip of this nature is usually sent from the mixing mills to the tubing mills through which it is fed and the variation in width of the strip sometimes causes the tubing millto choke and interferes withits f operation.

- Byimy invention, I have providedan automatic mechanism for removing this strip from the rolls, such mechanisminsuring a strip ofuniform width and at the same time automatically dustingpowdered soap stone on the strip as it drops into a: container, waiting to receive it. This mechanism eliminates the necessity for an assistant pin 17, the bar 18 carries another laterally' or helper as its operation is entirely automatic.

A post 13 projects from the side of the mill framelO and an arm li is provided with a portion 15 bent back upon itself and embracing the post 13. "Bolts. 16 draw the portion 16 toward the arm 14 so as to clamp the arm to the post 13. The arm 1% extends upwardly and laterally from the post 13 and carries at its upper end a laterally projecting pin or bolt 17 on w hich the bar 18 is pivotally mounted. At the end of the bar 18 adjacent the squeeze roll 12 it carries the laterally projecting shaft 19 on which. the

pulley 20 is journaled. At substantially an equal distancefrom the other side of the extending shaft 21 on whichthe pulley 22 is journaled. The

shafts

19 and 21 are held in position relative to the bar 18 by means of .the

nuts

28 and 23 threadedthereon. An endless conveyer belt 2e runs over the

pulleys

20 and 22.

Straps25 are secured to the bar 18 between the

pulleys

20 and 22 and extend transversely to the bar. These straps carry at their upper ends, the platform 26 which extends beneath the upper reach of the endless conveyer belt 24 and is wider than said belt, being provided with upwardly extending guide flanges 27 at each side thereof.

At the extreme upper end of the bar 18 there is carried a, bolt or pin 29 on which the bar 30 is pivoted. This bar forms one side member of the frame 31 of abox having a bottom 32 of wire screening. the forward corners of the frame 31 has secured thereto a leg 33 which extends downwardly below the bottom of said box. A tripper cam 34: is riveted toone edge of the flange of pulley 22 by the rivets 35, in position to engage the lower end of the leg 33.

The post 13 is provided with a longitudinally extending keyway 4i and a pair of.

knifeholders 36 are mounted on said shaft,

each of said knife holders having a key 45- fitting in said keyway 1d so, as to prevent rotation of the-knife holdersrelative to the post 13. A series ofholes or notches e6-are providedinthe post 13 in positions so that any one of them may, be engaged by the set screw 37 carried by the knife holder so as to accurately position the knife holder rela,

tive to'the post 13.. Each knife holder is provided with a slot 38 in its upper, part, in which a thin knife 39 is disposed. Said knife has a bayonet slot 410, opening, downwardly, in which a pin 4:1, extending transveisely of the knife holder 36 aerossthe slot 38, is engaged. The point 42 of the 'knife contacts with the roll 1250 that the cuttingedge of the knife slits the stock on the-roll. A spring 43 is connected at one end to the post 13 and at the other endito,

One of;

. so as to hold the pulley 20 in contact with the roll 12.

From the description of the parts given above, the operation of this mechanism should be very readily Lmderstood. The squeeze rolls l land 12 are positively driven in opposite directions, the direction of rotation being indicated by arrows on the variousfigures'of the drawings. The rotation of the roll 12 drives the pulley 20, due to the frictional engagement between the two, so that the belt 24: is driven, in the direction indicated by the arrow in; Fig. II. The knife holders 36 are positioned on the post 13 by means of the set screws 37 so asto be spaced at a pre-determined distance, depending upon the widthv of.- thestrip which the operator desires to take from the stock A. on the mixing mill. The point 4:2 of each knife engages the stock A on, theroll 12 at a point just above the end ofthe horizontal diameter of said roll: and slits the stock A in parallel slits, forming a strip B; of uniform Width. This strip B adheres. to the conveyer belt 24 ,and iscanried by said belt up over the platform 26; and, thepulley 22 anddrops from the pulley 22' into a container which is provided to receive it. Spring 43 holds the pulley 20 under tension against the roll,

As the pulley 22revolves, the trippcr cam 34 strikes theleg 33 once every revolution and lifts it,as shown in dotted lines in Fig. IV, allowing it to drop suddenly. This jars the powdered soap stone contained in the box 31 and dusts some of itthrough the screening 32 forming the bottom of the box upon the strip of rubber B which is being fed over the belt 2.4. VVhenthemechanism is not in use, the knives and knife holders can be removed by releasing the set screws 37 and; sliding, the knives laterally on the post 13. The bar 18 canthenbeswung on its pivot so as to carry the pulley 2011pwardly away. fromthe. roll 12 and the mechanism can be .heldfinthis position or it can; be entirely removed from the post 13 by releasing theboltslG which. clamp the arm 14:. to the post. 4

It willbe observedzthat this mechanism is fixed rel'ativeto. the squeeze rolls. and; in order to provide a continuous feed of; the stock through this take-off mechanism, the operator continuously removes portions of the rubber stock from other parts of the squeeze rolls andv dumps them between the squeeze rolls in line withathe-knives so that a sheet of stock is continuouslyformed on.

shown and described, is susceptible of coni said mill in parallel lines; automatic means for taking off the strip of stock so formed;

and automatically operable means for.dust-' ing a suitable powder on said strip.

2. The combination with .a rubber mixing mill, of means for slitting the stock on said mill in parallel lines; and take-off mechanism contacting with one of the rolls, and automatically operable thereby to take off the strip of stock so formed.

3. The combination with a rubber mixing mill, of means for slitting the stock on said mill in parallel lines; means driven by said mill, and automatically operable to take ofi the strip of stock so formed; and automatic means for dusting a suitable powder on said strip. Y

4. The combination witha rubber mixing mill, comprising a pair of squeeze rolls oppositely driven; of means for slitting the stock on one of said rolls in parallel lines; and an automatic take-01f mechanism, including a pulley contacting with and driven by one of said rolls and operable to automatically take off the strip of stock formed by said slits.

5. The combination with a rubber mixing mill including a pair of positively driven squeeze rolls; of means for slitting the stock on one of said rolls in parallel lines; automatic take-off mechanism, including a pulley contacting with and driven by one of said rolls, said take-off mechanism being operable to remove the strip of stock formed by said slits, and automatic means operable to dust the strip of stock so formed with a suitable powder.

6. The combination with a rubber mixing mill; including a mill frame, and a pair of positively driven squeeze rolls; of a support carried by said mill frame; a frame member carried by said support; a pulley journaled at one end of said frame member and contacting with one of said squeeze rolls a pulley journaled at the opposite end of said frame member; an endless belt passing around said pulleys and between the first-mentioned pulley and the squeeze roll; and means for slitting the stock on said squeeze roll in parallel lines.

7. The combination with a rubber mixing mill, including a mill frame and a pair of positively driven squeeze rolls; of a. frame member supported from said mill journaled in one end ofsaid frame; apulley frame member and contacting with one of i said squeeze rolls {a pulley j ournaled on the 7 other end of said frame member; an endless conveyer belt passing over said pulleys and between'said first mentioned pulley and the squeeze roll; means for slitting the stockon said roll in parallel lines; and (automatic means for dusting a suitable powder on the strip of ,stock'sof formed. r f p i 8. The combination with a rubber mixingmill, including a pair of positively driven squeeze rolls and a mill frame; of a support extending from said'mill frame; a

pair of knives carried by said support and operable 'to slit the stock onzone-of said squeeze rolls in parallel lines'to forma strip of stock; and a take-off mechanism includingv a pulley contacting with and driven by said squeeze roll and automatically operable i to remove the strip so formed from the roll 9. The combination witha rubber mixing mill, including a pair of positively driven squeeze rolls and a mill-frame ;'.of a support 'extendlng from said mill frame; a pair of knives carried by said support and-operable to slit the stock on one of said squeeze rolls in parallel lines to form a strip of stock; a

take-off mechanism driven by said squeeze roll and automatically operable to remove the strip soformed from the roll; and autowith a suitable powder. 7 10; The combination with a rubber m1);-

matic means for dusting the stripso formed ing milhincluding a mill frame and a pair of positively driven squeeze rolls; of a support extend ng from said mlll frame; a pair of knives carried by said support and oper- T able to slit the stock on one of said'squeeze rolls in parallel lines to form a strip of stocka frame member carriedby said support above said knlves; a pulley ournaled in one end of said frame member and conber; and an endless conveyor belt passing around said pulleys and between said first mentioned pulley and the'squeeze roll, and i operable to remove said strip of stock from the squeeze roll tosaid belt. I

11. The combination with a rubbermixing mill including a mill frame and a pair of positively driven squeeze rolls; of a support extending from said mill frame; a pair of knives carried by said support and operable to slit the stock on one of said squeeze port above said knives; a pulley journaled in one end of said frame member and contact ing with said squeeze roll; a pulley journaled at'the other end of said frame member; an endless conveyer belt passing around said pulleys and between said first menrolls in parallel lines to form a strip of i I stock; a frame member carried by said suptioned pulley and the squeeze roll, and operable to remove said strip of stock from the squeeze roll to said belt; and automatic means for dusting a suitable powder on said strip of stock.

12. The combination with a rubber mixing mill, including a mill frame and a pair of positively driven squeeze rolls; of a sup port extending from said mill frame; a pair of knives carried by said support and engaging one of said squeeze rolls to slit the stock thereon in parallel lines to form a strip of stock; a frame membercarried by said support above said knives; a pair of pulleys journaled on said fra-me'member; one of said pulleys contacting with said squeeze roll; anv endless conveyer belt passing over said pulleys and between one of them and the adjacent squeeze roll; and automatic means operable by the other of said pulleys to dust a, suitable powder on the strip of stock.

13. The combination with a rubber mi};- ing mill, including a mill frame and a pair of positively driven squeeze rolls; of a supportextendin'g from said mill frame; a pair of knives carried by said support and contacting with one of said squeeze rolls to slit the stockthereon in parallel lines to form a strip of stock; a frame member carried by said support above said knives; a pair of pulleys journaled on said frame member; one of said pulleys contacting with said squeeze roll, an endless conveyer belt passing around said pulleys and between one of them and the adjacent squeeze roll; a box pivotally mounted on said frame member and provided with a perforate bottom; and

automatic means for rocking said box on its pivot.

14. The combination with a rubber mixing mill, including a mill frame and a pair of positively driven squeeze rolls; of a support extending from said mill frame; means for slitting the stock on one of said squeeze rolls to form a strip of'stock; a frame member carried by said support; pulleys journaled on said frame member, one of said pulleys contacting with said'squeeze roll; an endless conveyer belt passing around said pulleys and between one of them and the adjacent squeeze roll; a box pivotally mounted on said frame member and provided with a perforate bottom; a leg depending from saidbox; anda tripper cam'mounted'on one of said pulleys and engaging said leg.

15. The combination with a-rubber mixing mill, including a mill frame and a pair of positively driven squeeze rolls; of a suppo'rtlextending from said mill frame; means for slittingth'e stock onone' of said squeeze rolls in parallel" lines to form a strip of stock; a frame member carried by said'support; a pair of pulleys journal'ed on said frame member, one of said pulleys contacting withsaid squeeze roll, an endless-conveyer belt passing around said pulleys and between one of them and the adjacent squeeze roll; and a platformprovided with marginal flanges disposed beneath the upper reach of said conveyer belt between said pulleys.

In testimony whereof, I aiiix my signature.

SEBASTIAN DI'ETRIGH'.