US2971580A

US2971580A - Slice tip mounting

Info

Publication number: US2971580A
Application number: US711957A
Authority: US
Inventors: Edward D Beachler; John E Goodwillie
Original assignee: Beloit Iron Works Inc
Current assignee: Beloit Iron Works Inc
Priority date: 1958-01-29
Filing date: 1958-01-29
Publication date: 1961-02-14
Anticipated expiration: 1978-02-14

Description

Feb. 14, 1961 E. D. BEACHLER ETAL 2,971,580

SLICE TIP MOUNTING 2 Sheets-Sheet 1 Filed Jan. 29, 1958 ELL/E afar- 5 Edward D. BdC/Z ler Feb. 14, 1961 E. D. BEACHLER E'I'AL SLICE TIP MOUNTING Filed Jan. 29, 1958 2 Sheets-Sheet 2 ME 22227 TE Edward D. Beach/e1 01111 E. GooaurU/ie 5% dmm/fiwgtzy United States Patent SLICE TIP MOUNTING Filed Jan. 29, 1958, Ser. No. 711,957

7 Claims. (Cl. 162-340) This invention relates to paper making machines, and more particularly, to a variable stock inlet.

Although the instant invention may have a number of uses in various fields, it is particularly useful in the art of paper making and will be described pirmarily in connec'tion therewith. The present invention is useful in connection with delivering stock to a cylinder mold roll or a Fourdrinier wire trained over an open breast roll. Adjustable stock inlets have been known earlier in the prior art, but these devices in most instances left something to be desired in facility of adjustment, accuracy of adjustment, maintenance of parts, or the like. In addition, the present machines operate at much higher operating speeds than heretofore used and adjusting devices must now be much more accurate, since the stock is fed under pressure against the forming wire in order to maintain the desired machine speed.

The instant invention provides for a number of different adjustments, each cooperating with the other to assist in the accurate definition of the stock flow orifice to compensate for a number of different aspects. The instant invention provides for refined or delicate control of the stock flow orifice laterally of the machine. It also provides for accurate control of the overall thickness of the throat through which the stock flows ontothe forming wire, by adjustment of a plurality of elements. The instant invention further provides for a simplified adjusting arrangement which is particularly efiective for use with stock under pressure.

It is, therefore, an important object of the instant inven tion to provide an improved adjustable stock supply duct or inlet.

Another important object of the instant invention is to provide an improved paper machine having a rotatably mounted foraminous roll and a stock Supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface. an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge of the inner wall, a housing mounting the inner wall, pivot means on said housing adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner Wall, and sealing means interposed between said housing and said outer wall to definea closed stock receiving chamber with said housing and said walls.

Other and further objects, features and advantages of the present invention will become apparent to those skilled in the art from the following detailed disclosure thereof and the drawings attached thereto and made a part hereof.

On the drawings:

Figure 1 is a fragmentary sectional elevational view taken down the center line of a machine embodying the instant invention; and

extending in close proximity to Figure 2 is a fragmentary elevational view taken from the side of the machine of Figure '1.

As shown on the drawings:

In Figure l, the adjustable stock inlet of the present invention is illustrated in association with a rotatably mounted cylinder 10 having a foraminous forming surface 11. This cylinder 10 may be a cylinder mold roll in a cylinder paper machine or an open breast roll about which a Fourdrinier wire may be trained. Further, depending upon the installation, the foraminous forming surface 11 may or may not have a pressure difierential thereaeross for purposes of aiding in the forming of a paper sheet;'and the forming wire thereon, if one is used, may be a full length Fourdrinier wire or a short looped forming wire.

The present invention is concerned with delivering stock to the arcuate forming surface 11a of the cylinder 19 by means of an adjustable stock inlet or stock supply duct, indicated generally by the reference numeral 12. The stock inlet 12 comprises an inner wall 13 having a leading edge 13a extending parallel to the axis of rotation of the roll 19 and in close proximity to the outer roll surface 11a, an outer wall 14 having a leading edge 14:: the outer roll surface 11a and in spaced relation to the leading edge 13a of the inner wall 13, and a housing indicated generally at 15.

The housing 15 is provided with a bottom stock inlet 15a, a back wall 15b, a top wall 150, a bottom 15d and side walls 15c, 15c. As will be noted, a rectifier roll 16 is mounted in the bottom stock feed line 15a and another rectifier roll 17 is mounted in close running relation to the bottom Wall 15d of the housing 15. The rear side wall 15:: shown in Figure 1 mounts a manhole 18, an inlet for gas under pressure such as compressed air, shown at 19, and a level control blow hole 20 for maintaining a stock level L in the housing 15 under pressure supplied by compressed air through the inlet 19. The level L is maintained so as to just submerge the rectifier roll 17.

As shown in Figure 1, the inner wall 13 herein is designated as only a relatively small lip 13, which is secured to the upturned portion 15 of the bottom by suitable means such as a threaded screw assembly (not shown) and the inner wall 13 is mounted on shims 21 for limited vertical adjustment. Other adjustable means may be used; but the shims serve to form a smooth continuous floor line for the stock flowing past the inner wall 13., The shims 21 mount the inner wall 13 on the housing 15 for limited adjustment of the inner wall leading edge 13a toward and away from the outer wall leading edge 14a. Actually, movement of the inner wall 13 serves to open and close a throat T between the inner wall leading edge 13a and the base of an arcuate wall portion 14b of the outer wall 14 that conforms generally with the contour of the roll 10 in the arcuate region 11a.

It will be noted that the outer wall 14 is a relatively large unitary element of generally triangular cross-section, with one apex of the triangle at the leading edge 140, a lower apex at the bottommost portion 14c of the wall 14 and a third apex 1411 at the rear. Pivot arms 14d mounted on opposite sides of the wall 14 (or secured to end Wall portions 14e thereof) extend upwardly and forwardly to a

pivot pin

22, 22 on opposite sides of the machine. The pivot pin 22 is actually carried by an upward extension of the side wall 15e of the housing 15 in the manner which will be described later in connection with Figure 2 of the drawings.

The pivot pin 22 is mounted adjacent the leading edge 14a of the outer wall 14 and the pivot 22 swingably mounts the entire outer wall 14 for movement toward and away from the leading edge 13a of the inner wall 13 (at the throat T). It will be appreciated that this In type of swinging adjustment at the throat and along the entire arcuately contoured wall portion 14b facing the roll surface 11a is different from adjustment of the inner wall 13 by downward movement thereof. For example,

if the inner wall 13 is moveddownwardly slightly, the area of the throat T will be increased and a greater amount of stock may impinge upon the roll surface 11a.

'This adjustment does not, however, change the space between the roll surface 11a and the arcuately contoured portion 14b of the outer wall 14, so this greater amount of stock passing through the throat T must have a higher flow rate or speed in the arcuate region immediately beyond the inner wall leading edge 13a. Since it is desired to correlate the speed of stock flow with the speedof the outer roll surface 11a (and in most instances to keep these speeds approximately the same) additional adjustment is required. This adjustment involves movement of the arcuately contoured portion 14b of the outer wall 14 away from the roll surface 11a. In such an arrangement, a greater amount of stock can be impinged upon the roll surface 11a, without the necessity of altering the rate of flow or stock speed in the critical region. Also, the limited swinging movement of the wall 14 about the pivot 22 does not alter other performance features of the inlet 12.

For example, near the region 14c of the wall 14 there is provided a relatively flat region 14f. This portion 14f is mounted in close running relation to the top of the rectifier roll 17 and it extends a slight distance so that, during the limited pivotal movement of the entire wall 14, the wall portion 14 continuously provides a surface in close running relation to the rectifier roll 17.

It will also be noted that sealing means indicated generally at 23 are interposed between the housing and the outer wall 14 to define a closed stock receiving chamber with the housing 12 and the walls 13 and 14. The sealing means 23 close this chamber so that air pressure may be built up therein by the air inlet 19. It will be appreciated that stock in this chamber may be maintained under pressure merely by a. suitable stock flow pump (not shown) and without the use of air under pressure and the level control 20 here shown. In either case, the sealing means 23 is effective to maintain such pressure. As here shown, the sealing means 23 comprise a U-shaped channel 23:: suitably secured to the top 15a of the housing 15 and mounting a rubber sealing strip 23b therein. Pneumatic means such as an air pressure loaded elastomer tube 230 is seated in the U-shaped channel and resiliently urges the sealing strip 23b against the wall portion 14c of the outer wall 14. It will be noted that the wall portion 140 provides a rather fiat portion of limited length which will engage the sealing strip 2315 during limited pivotal movement of the entire wall 14. v

The uppermost region of the arcuately contoured wall portion 14b of the outer wall 14 is relatively flexible. Means are provided for limited adjustment of this flexible wall portion 14b in the region of the leading edge 14a. A hollow tubular beam 24 extends the full width of the machine between the

pivot arms

14d, 14d and is secured thereto by suitable means, such as welds or the like (not shown). A plurality of laterally spaced independent adjustable rods 25 pass through the hollow beam 24 and are connected by pivot means 25a to laterally spaced portions of the arcuate wall 14b. Axial movement of the individual adjusting rods 25 is employed to adjust the position of the relatively flexible arcuate wall portion 14b. The upper ends of the rods 25 are threaded and these threaded ends are threadedly received within a relatively rotatable sleeve 26 which in turn is threadedly receivedby fixed sleeve portions 24a mounted on the hollow shaft 24. The sleeve 26 is rotated for adjustment by engaging the nut 27 mounted thereon and the desired adjustment of the rod 25 is thus accomplished. This type of adjustment provides for limited delicate lateral adjustment of the arcuately contoured wall portion 14b in the region of the leading edge 14a in the outer wall 14.

More substantial adjustment of the outer wall 14 in the region of the leading edge 14a is afiorded by an adjustable mounting of the pivot pin 22, which is best shown in Figure 2. it will be appreciated that Figures 1 and 2 are both taken facing the machine from the same side, so that Figure 1 is actually a view in cross-section taken with the side elements visible in Figure 2 removed. Fi ure 2 shows near the bottom thereof the outside of the housing side wall He. This housing side wall 15c and the rear housing side wall 152 shown in Figure 1 are, of course, symmetrical in design and they sealingly engage the pivotally mounted outer wall 14, permitting limited swinging movement of the entire wall 14. The side housing walls 15c, 15a are each provided with upward extensions 30 secured thereto by suitable means, which may include a bolt and nut assembly at 31 of Figure 2. The upwardly extending side wall portions 38 each'mount a worm screw adjusting device 32, which is a well known device that need not be described in great detail. In essence, rotation of a single threaded shaft 33 extending across the machine and engaging worms (not shown) within housings 34 effects relative axial movement of the worm gears. A shaft 35 (Figure 1) is connected to the worm gears and is in turn connected to a sleeve 36 pivotally mounted on a pin 37 secured to the sidewalls 142 of the swingable outer wall 14. The

worm gear assemblies

32, 32 thus effect the limited swingable movement of the outer wall 14 about the pivot 22. Follow-up mechanism 38 (Figure 2) connected to the pivot pin 37 indicates on a gauge 39 the precise position of the outer wall 14 and particularly the precise position of the arcuately contoured wall portion 14b. In this way extremely accurate positioning of the arcuately contoured wall portion 14b is accomplished and maintained.

The outer housing walls 15e also mount the forward sealing strips 40 which sealingly engage the lateral edges of the forming surface 11a on the roll 10 in the conventional manner. The

top extremities

30, 30 on the housing side walls 15e, 15e adjustably mount the pivot pins 22, 22 on frame elements 41, 41. The frame elements 41 threadedly receive an adjusting screw 42 and are adjusted in position by very limited movement axially of the screw 42. A lock nut 43 fixes the position and lock nut assemblies 44 and 45 secure the adjusting screw 42 to the mounting elements 30 on each side. The adjusting arrangement is conventional, but it affords in the instant device an additional important adjustment in that it effects limited movement of the pivot pin 22 toward and away from the roll 10 and thus affords movement of the leading edge 14a of the outer wall 14 toward and away from the forming surface 11a. This adjustment moves the entire leading edge 14a to a new position, whereas the individual adjusting rods 25 provide limited adjustment in separate and independent laterally spaced regions of the arcuately contoured wall portion 14b and the leading edge 14a.

It will be understood that modifications and variations may be effected without departing from the spirit and scope of the novel concepts of the present invention.

We claim as our invention:

1. In a paper machine having a rotatably mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge of the inner wall, a housing mounting the inner wall, a pressure air supply connected to the housing to form an air chamber in the upper portion of the housing for pressurizing the stock flowing between said inner and outer wall, a stock level control maintaining the stock in the lower portion of the housing, pivot means on said housing adjacent the leading edge of said outer wall swingably mounting the entire outer Wall for movement toward and away from the leading edge of the inner wall, and sealing means spaced from the pivot means interposed between said housing and said outer wall forming an air seal therebetween in said upper portion of the housing during swinging movement of said outer wall to define a closed stock receiving chamber with said housing and said walls.

2. In a paper machine having a rotatably mounted forarninous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge ofthe inner wall, a housing mounting the inner wall, a pressure air supply connected to the housing to form an airchamber in the upper portion of the housing for pressurizing the stock flowing between said inner and outer wall, a stock level control maintaining the stock in the lower portion of the housing, pivot means on said housing adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, sealing means spaced from the pivot means interposed between said housing and said outer wall forming an air seal therebetween in said upper portion of the housing to define a closed stock receiving chamber with said housing and said walls. flexible means on said outer wall in the region of its leading edge defining a stock flow restriction with the roll, and means for adjustably positioning the flexible means.

3. In a paper machine having a rotatablv mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge of the inner wall, a housing mounting the inner wall, a pressure air supply connected to the housing to form an air chamber in the upper portion of the housing for pressurizing the stock flowing between said inner and outer wall, a stock level con trol maintaining the stock in the lower portion of the housing, pivot means on said housing adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, sealing means spaced from the pivot means interposed between said housing and said outer wall forming a seal therebetween during swinging movement of said outer wall to define a closed stock receiving chamber with said housing and said walls, and a rectifier roll mounted in said housing in close running relation to said housing, said outer wall having a wall portion movable along the surface of said rectifier roll with said outer wall continuously providing a surface in close substantially spaced running relation to said rectifier roll during swinging movement of said outer wall.

4. In a paper machine having a rotatably mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge of the inner wall, a housing, means mounting the inner wall on said housing for limited adjustment of the inner wall leading edge toward and away from the outer wall leading edge, a pressure air supply connected to the housing to form an air chamber in the upper portion of the housing for pressurizing the stock flowing between said inner and outer wall, a stock level control maintaining the stock in the lower portion of the housing, pivot means adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, means adjustably mounting said pivot means on said housing for movement toward and away from the foraminous roll, a flexible resilient sealing means spaced from the pivot means interposed between said housing and said outer wall forming a seal therebetween during swinging movement of said outer wall to define a closed stock receiving chamber with said housing and said walls, and a rectifier roll mounted in said housing in close running relation to said housing, said outer wall having a wall portion movable along the surface of said rectifier roll with said outer wall continuously providing a surface in close substantially constantly spaced running relation to said rectifier roll during swinging movement of said outer wall. a

5. In a paper machine having a rotatably mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface and in spaced relation to the leading edge of the inner wall, a housing, means mounting the inner wall on said housing for limited adjustment of the inner wall leading edge toward and away from the outer wall leading edge, pivot means adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, means adjustably mounting said pivot means on said housing for movement toward and away from the foraminous roll, a flexible resilient sealing means spaced from the pivot means interposed between said housing and said outer wall forming a seal therebetween, during swinging movement of said outer wall to define a closed stock receiving chamber with said housing and said walls, a rectifier roll mounted in said housing in close running relation to said housing, said outer wall having a wall portion movable along the surface of said rectifier roll with said outer wall continuously providing a surface in close substantially constantly spaced running relation to said rectifier roll during swinging movement of said outer wall, flexible means on said outer wall in the region of its leading edge defining a stock flow restriction with the roll, and means for adjustably positioning the flexible means.

6. In a paper machine having a rotatably mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roli axis and in close proximity to the outer roll surface and in spaced,

relation to the leading edge of the inner wall, a housing, means mounting the inner wall on said housing for limited adjustment of the inner wall leading edge toward and away from the outer wall leading edge, pivot means adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, means adjustably mounting said pivot means on said housing for movement toward and away from the foraminous roll, a flexible resilient sealing means spaced from the pivot means interposed between said housing and said outer wall forming a seal therebetween during swinging movement of said outer wall to define a closed stock receiving chamber with said housing and said walls, a rectifier roll mounted in said housing in close running relation to said housing, said outer wall having a wall portion movable along the surface of said rectifier roll with said outer wall continuously providing a surface in close substan- 1ble means on said outer wall in the region of its leading edge defining a stock flow restriction with the roll,

and a plurality of laterally spaced independent means for adjustably positioning the flexible means.

7. In a paper machine having a rotatably mounted foraminous roll, a stock supply duct for supplying stock to said roll which comprises an inner wall having a leading edge extending parallel to the roll axis and in close proximity to the outer roll surface, an outer wall having a leading edge extending parallel to the roll axis and in close proximity to theouter roll surface and in spaced relation to the leading edge of the inner wall, a housing, means mounting the inner wall on said housing for limited adjustment of the inner wall leading edge toward and away from the outer wall leading edge, pivot means adjacent the leading edge of said outer wall swingably mounting the entire outer wall for movement toward and away from the leading edge of the inner wall, means adjustably mounting said pivot means on said housing for movement toward and away from the foraminous roll, sealing means spaced from the pivot means carried by said housing and urged against a face of the outer wall formed to continuously engage the sealing means during swinging movement of the outer wall, said sealing means defining a closed stock receiving chamber with said housing said said walls, means for resiliently urging said sealing means against said face of said outer wall, a rectifier roll mounted in said housing in close running relation to said housing, said outer wall having a wall portion movable with said outer wall continuously providing a'surface in close running relation to said rectifier roll during swinging movement of said outer wall, flexible means on said outer wall in the region of its lea ing edge defining a stock flow restriction with the roll, and a plurality of laterally spaced independent means for adjustably positioning the flexible means.

References Cited in the file of this patent UNITED STATES PATENTS 2,046,270 Lane et al. June 30, 1936 2,154,719 Berry Apr. 18, 1939 2,162,097 Metcalf June 13, 1939 2,168,996 Lane et a1. Aug. 8, 1939 2,200,002 Lane et a1. May 7, 1940 2,203,802 Thaler June 11, 1940 2,418,600 Ostertag et al. Apr. 8, 1947 2,658,430- Stevens Nov. 10, 1953 2,717,539 Metcalf Sept. 13, 1955 2,737,088 Heys Mar. 6, 1956 FOREIGN PATENTS 179,704 Austria Sept. 25, 1954