US1724441A - Pulping machine - Google Patents

Description

Aug. 13, 1929.. H. N. WEiR PULPING MACHINE 2 Sheets-Sheet 1 Filed Aug. 13. 1928 Aug. 13, 1929. H. N. WEIR PULPING MACHINE Filed Aug. 13 1928 2 Sheets-Sheet 2 W M ,ew

Patented Aug. 13, 1929 UNITE" STATES rarer Erica. 1

HARRY N, WEIR, or HoosIcK FALLS, NEW YoRK, AssreNoR TO THE NOBLE & woon MACHINE 00., on HOOSICK FALLS, NEW YORK, A. CORPORATION OF NEW'YORK.

IULPING MACHINE.

Application filed August 13, 1928.

This invention relates in general to grinding machines of the type in which the grinding, crushing agents or elements are rods or rollers, and which are called rod mills.

More particularly this invention relates to devices: which are adapted for use in reduc ing wood chips and other fibrous materials to a pulp; and which may be utilized for grinding ores and other materials of a similar nature.

A principal object of this invention is to .produce an improved machine capable of quickly reducing hydrated fibrous materials to a satisfactorily fine pulpy state; which will be particularly efiectivein working ma.- terials which contain a proportion 0 unusually hard parts, as for instance wood chips which contain a proportion of knots; which may be used to grind ores and other 50 hard and comparatively brittle substances; and which will automatically screen out and discharge the sufficiently fined parts of the material being worked thereby allowing for the continual feeding of the device. 7

Another object is to produce a machine which though using comparatively light weight crushing or grinding elements w1ll be as effective in crushing hard parts contained in the material being worked as is 0 theusual rod mill wherein the rods or crushing elements are much heavier; and to provide for the automatic breaking up of the mat naturally formed on the inside of the shell of the drum of the device when hydrated fibrous materials are being worked.

The manner in which I have accomplished my objects is illustrated in the accompanying. drawings, which are in a certain sense illustrative only, and in which:

Fig. 1 is a cross section through an improved pulping machine embodying my 1n-, vention, a discharge chute being indicated by dotted lines.

Fig-2 is a front elevation, parts broken away.

Fig. 3 and Fig. 4 are cross sections, similar to that shown in Fig. 1, illustrating two modified forms of combined driving and guiding disk.

The same reference characters refer to the same parts throughout the several views.

Referring to the drawings, 2 represents the shell of the drum of my improved machine; 14 and 15 represent the heads of the drum and which are provided with suit- Serial No. 299,254.

able legs or standards 34 or 35 whereby the drum may be supported. A feed opening or hopper 4 is formed on and through the top of the shell 2, and a portion of the lower half thereof is perforated as at 20, to pro vide for the automatic escape of the material being worked as soon as it has reached the desired degree of fineness. A suitable discharge chute is preferably provided. to convey the escaping pulp, or other material, away from the'machine. Such a chute is indicated by dotted lines in Fig. 1. Mounted concentric with the shell of the drum, 2, through openings in the heads 14 and 15, which openings are preferably provided with suitable stufling boxes 16,-is a shaft 7 which is journalled in bearings formed in or mounted on pedestals 5 and 6. One end of the shaft 7 is to be provided with means, as the pulley 8, whereby power may be applied to cause the shaft and those parts which are secured to or connected there with to be rotated. 1

Just inside the heads 14 and 15 ofthe drum, andsecured to theshaft 7 is a complemental pair of combined driving and guiding disks 10 and 11, on the inner face of which areformed guideways or slot's12 adapted to engage, drive, and direct the radial movement of the crushing elements or rollers 9. The guideways 12 are spaced about, and radiate from the. center of the disks; their exact arrangement depending on the action desired of the rolls which they are to drive and guide. j In the machine illustrated by Figs. 1 and 2 the rollers'are'all to have the same allowable motion away from and toward the center of the drum, each being allowed tocontact with the shaft 7, or the wear rings which cover it if they be used. ,While in the modified forms illustrated by Figs. 3 and 4 certain of the rollers have their possible inward movement limited; theguideways being so located that while some of the rollers will fall against the shaft when they are driven above the center, others will fall against other of the rollers. The number of rollers in the devices may be increased or decreased; and driving means other than the disks illustrated may be used without departing from the spirit of this invention. The pedestals 5 and 6 may be omitted and the bearings be formed in the heads.14 and 15 if desired.

That portion'of the shaft 7 which lies be tween the disks 10 and 11 is preferably protected by renewable wearing rings 7 or j ackets 13. 7

When working hydrated fibrous materials in rod mills to reduce them to pulp, there is a natural tendency for the material to form a mat against the shell of the drum and so decrease the efficiency thereof; The formation of such a mat on the inside of my. improved device would prevent the free escape of the material being worked as soon as it had been reduced to the desired condition or fineness, and to eliminate the possibility of such a mishap I provide means for automatically breaking up such a mat as rapidly as it is formed, these means comprising a number of scraper bars 1?, can ried by and between the disks 10 and 11 and so located that the working edge thereof is carried about the drum in close proximity to the shell, being adapted to scrape loose any part of the material which may have adhered thereto and to free the perforated part of the shell so that free exit of fined stock is always permitted. 7

vIn the drawings the perforations which provide the screened outlet are illustrated as being formed in the shell 2 itself, whereas in most'cases it will be advisable to out out a part of the sheet forming the shell, and'replace the cut out portion by a perforated and formed sheet detachably secured in place in some suitable manner so that a sheet having a different size or type of perforation may be easily substituted when such a change is desirable.

The operation of my improved pulping machine is as follows:

When power is applied 7 to rotate, the combined driving and guiding disks secured thereon, and which at all times engage the ends of the rollers 9, force said rollers to travel about the inside of the shell 2, they moving with the shaft 7. The rollers 9 ride, and are free to move in the guideways 12, and those of the rollers which lie below the center of the shaft 7 naturally gravitate toward the lowest end of the guideways and so are brought into contact with the shell 2, along which they will roll until such time as they are raised above the center, when gravity will cause them to roll or drop toward the opposite end of the guideways and the center of the drum. The distance which they will travel in this direction being fixed by the relative length, or position of the guideway in which it is located. If the device be constructed substantially as illustrated in Figs. 1 and 2 the rollers when raised to a point'above the center will gravitate inwardly and downwardly until they contact with the shaft 7 (or the wearing rings thereon if such be used) against which they will lie to cause the shaft 7 they will wardly until they contact with the shell 2 until the driving disks have rotated far enough to bring them below the center when drop or roll downwardly and out of the drum, along which they will roll until they are again raised above the center whenthey will repeat.

, It is obvious that the rollers 9, being driven and guided as above described will deliver two hammer-like blows during the time they are making one complete turn.

about the shaft 7, one being delivered toward the shaft 7, theother toward the shell 2; and that the crushing effect of these guided hammer-like blows, though by a com-- paratively light weight roller may be as great as the crushing effect of much heavier rollers working as in a usual rod mill. The effectiveness of these blows will of course depend to a large extent on the distance which the rollers move radially when changing from one extreme position to the other.

It is also obvious that stock of any usual consistency fed into the machine through the hopper l wil be pounded, rolled, and crushed as long as it remains therein, be until it has been reduced to the desired fineness when it will automatically escape through the perforated portion of the shell 2; it is also obvious that the scraper bars- 17 as they are carrled around just inside the shell will scrape loose, or otherwise break up any mat of the material being worked which may start to form.

I claim: H

1. In a pulping machine: a stationary horizontal drum a portion of the lower half of the shell thereof perforated, and having a feed opening formed through the upper part thereof; a multiple number of rollers longitudinal in said drum; a shaft central in said drum; and means whereby the rotation of said shaft will cause said rollers to move therewith each of them "free to move to and fro between said shaft and the shell -of said drum. I g

2. Ina pulping machine: a stationary horizontal drum with a feed opening through the upper part thereof, a portion ofthe lower half thereof perforated a shaft concentric with the longitudinal axis of said drum; scraper bars supported from said shaft and revolving therewith and in close proximity to the wall of the drum; and a plural number of rollers in said drum'all revolving with said shaft and each capable of independent movement. Y r Y 3. In a pulping machine: a stationary horizontal drum comprising a shell with a feed opening through the upper side thereof aportion of the lower half of said shell perforated, and a pair. of heads secured in the ends ofsaid shell each of them provided with asupport and each having an opening which willshaft mounted concentric with said shell; a shaft extending through the drum; a pair of disks with guideways formed on the inner face thereof secured on said shaft within said drum one near each of said heads;

and rollers between said disks the ends thereof lying in and free to move along said guideways. v

4. In a pulping machine: a stationary drum comprising a horizontal shell with a feeding hopper formed on and through the top side thereof a portion of the lower half of said shell perforated, and a pair of heads secured in the ends thereof each of them provided with a support and each having an opening through the center thereof arranged for packing and adapted to pass a shaft; a shaft extending through said drum; supporting bearings for said shaft;

of said disks and free to travel therein.

ly radial guideways therein secured to said shaft within said drum one near each end thereof; and rollers lying between said disks each end thereof in a guideway in one 5. In a pulping machine, a stationary horizontally disposed cylindrical shaped drum; a plural number of rollers lengthwise of and in said drum; means for forcing said rollers to revolve about the center of said drum at times in contact with the shell thereof; and scraper bars mounted on said means in close proximity to said shell and revolving with said rollers around said center.

In testimony whereof I have affixed my signature.

HARRY N. WEIR.

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