US1220550A - Protective-element-forming machine. - Google Patents

Description

R. A. PLUMB & C. R. WEED. PROTECTIVE ELEMENT FORMING MACHINE.

APPLICATION FILED JAN-25, 1916.

Patented Mar. 27, 1917.

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PROTECTIVE ELEMENT FORMING MACHINE.

APPLICATION 'FILED JAN.26, 1915 Patented Mar. 27,1917.

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H. A. PLUMB & C. R. WEED.

PROTECTIVE ELEMENT FORMING MACHINE.

APPLICATION FILED .IAN.26, I916- 3,220,550

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Patented Mar. L7, 1917.

R. A. PLUMB & C. R. WEED. PRQTECTIV'E'ELEMENT FORMING MACHINE.

APPLICATION FILED JAN.26. l9l6- Patented Mar. 27, 1917.

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ROY AL PL i TBUSSED CONCRETE STEEL COMPANY, OF DETROIT,

MICHIGAN.

i ll: CLARENCE R. WEED, F DETROIT, MICHIGAN, ASSIGNOES TU MICHIGAN, A CORPORATION 61F rnorEcrrvn-nLEMnnr-ronranve MACHINE.

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Specification of Letters Patent.

Patented hilar. 2'2, 11991 t.

i l Application filed January 26, 1916. Serial No. 74,298.

To all whom it may concern:

Be it known that we, Roy ALFRED PLUMB and CLARENCE R. WEED, both citizens of the United States, and residents of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Protective-Element-Forming Machine of which a specification.

machine for forming a refractory composition board. (from fibrous, preferably firea is gradually compressed proof, and cementitious materials) suitable for use on roofs,.s1d1ngs and for general protectlve purposes; and among its important features are the following z-nieans whereby two moving layers or laminations of fibrous material are continuously relation with a much thicker intermediate body. layer of plastic cementitious material,

fabricso formed and exc ess moisture is expelled therefrom to a degree that admits ready removal of the sheet from and means whereby the T the machine; means whereby suction is applied to induce proper and uniform feeding of the intermediate layer of cement in respect to the fibrous material; means whereby the fibrous material applying belts or webs are cleaned; and means whereby excess moisture is expelled therefrom. The invention further consists in the details of construc tion shown, described and claimed; and it also consists in a process of manufacture whereby the fabric is formed and made uniform throughout.

In the drawings,

Figure 1 is a side "view, the edge forming tapes and various other parts being broken away. Fig. 2 is an end view from the left in Fig. 1. Fig. 3 is a diagrammatic side view showing the arrangement ofthe vats and circulating system. Fig. t is a transverse section through the suction roller and adjacent parts. Fig. 5 is a fragmentary longitudinal section through the suction roiler, parts being shown in elevation. Fig. 6 is an end view of the roller looking from the left in Fig. 2. Fig. 7 is an enlarged fragmentary longitudinal section showingthe action of the feed or suction roll and the pressure material. Fig. 8 is a transverse section through the belts and tapes with the material inclosed and being molded thereby.' Fig. 9 is a continuation ofFiTg. 1. Fig. 10

formed and in- 'timately combined 1n coating or covering bearings 38 carried rolls upon the is a vertical section through one of the vats like for the fibrous material.

Similar reference characters refer to parts throughout the several views.

In the embodiment of our invention shown, 1 indicates uprights, 2 and 3 the upper and lower the cross beams that form the main frame.

Supported upon the frame and floor 5, re-

. mg layers. The .vats receive a constant renewal of fibrous material from a mixer or beating engine 10 (conventionally shown in F ig. 3) through storage tank 11, pipes 12-13 and valves lat; and the overflow therefrom is returned to pipes 1516, valves.18 and pump 19, the latter of which is driven in any suitable way, for example, by shaft and belt 21.

In the preferred construction, the vats 6 and 7 (Fig. 10) each include a receiving chamber 22, .an intermediate or working chamber 23 and a; discharge chamber 24, the walls 25 and 26 between the chambers being adjustable in height, preferably by means of strips 28 held guides. Sharp corners in the intermediate chamber are avoided by corner pieces 29, and the liquid is kept stirred by agitators 30 located near the bottom. mersed in the intermediate chamber and supported on a horizontal shaft 3l.is a ro tatable hollow cylinder mold or collector 32, the surface of which is preferably formed of woven wire of fine mesh. As the collector rotates, the fibers are gathered during its passage through the liquid and remain in a thin sheet thereon until removed in a manner hereinafter described' The collector or mold in passing thereover throughout arc abelt which is held in close contact therewith by a presser roll 36 that turns in by the arms 39 pivotally supported at 40. The roll 36 has a' fabric facing 41 and is arranged tangential to the mold 32. The parts moving in the direction of the arrows in Fig. 1, much of the Water is extruded and the thin sheet of collected material is transferred from the mold to the vat '6 has longitudinal beams, and 4,

the mixer througha considerable,

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in appropriate Partly imthe belt. Such water as finds its way to the upper surface of the belt is discharged beck into the vat by means'of the dripboard 4'2 pivotally supported at 43.

From the roll 36 the belt passes to the right (Fig. 1) over a guide roll 44 (which may be omitted), guide rolls 45, the bed of press-rolls 46 and the end roll 48 (preferably the drive roll, its power being supplied from belt 49 through reduction gearing 50),

and is guided in its return to the collector by the tension roll 51, the guide roll 52 (the ends of which are carried by independently adjustable bearings 53 whereby a tendency for the belt to shift laterally may be corrected), guide roll 54 and guide roll 55. Streams of water from spraypipes 56a-re directed against the surface of the belt to remove any material which may adhere thereto, and a vibrator 58 may be employed to insure a morev thorough washing action. A presser roll 59, carried by a weighted arm 60 pivoted to the frame at 61, bears on the belt opposite the guide roll 55 and presses the excess water therefrom.

- A belt 63, similar to the belt 35, passes over the mold in the rat 7, and is guided by elements 64, 65, 66, 68, 69 and 70 that correspond, respectively, to elements 48, 52, 54, 55, 36 and 44. The presser roll 71 in this case also acts as a guide roll for the upper run of the belt. At a-point between the guide rolls and the press rolls for the belt 35, the belt 63 passes around a suction roll 80 and from there passes beneath the presser rolls 81 (which gradually converge with the rolls 46) to the drive roll 64.. The press rolls 81 are carried by a frame 83, the forward and rear ends of which are independently'adjustable'toward and from the rolls 46 by means of screws 84 that turn in nuts 85 supported on the main frame. .It will be understood that the belts 35 and 63 passing to the right below the roll 80 are spaced somewhat from each other, and that each bears a thin substantially homogeneous layer of wet fibrous material.

Located just to the left of the roll 80 is a cement chute 90 of a width substantially equal to that of the belts, to which wet plastic hydraulic cement 91 is supplied through a pipe 8 and valve 93 from a suitable mixer 94 (Fig. 3).

Referring now particularly to Figs. 4, 5 and 6, it will be seen that the suction roll 80 comprises the heads 100 (carried on the shaft 101) that are joined by the sectors 102 having longitudinal chambers 103 opening to the outer surface of the roll by passages 104. One of the heads, makes a close joint with a fixed valve plate 105 in communication with a suction pipe 106 and hose 107 that leads to an air pump 108 (Fig. 2). The

pipe 106 has a branch 109 and the valve plate preferably connects the chambers 103 with the pipe or hose at two points in their angular rotation-one, opposite the cementv 91 in the chute, and the other at a point forward of the point of contact of the on-coming run of the belt 63. When the connection is made in the manner first stated, the belt is drawn tightly onto the roll and excess water is removed, and when made as stated last, the cement is drawn radially into close contact with the belt to prevent the plastic mass from being pressed back away from the converging belts and to insure uniform feeding thereto (see especially Fig. 7). The suction roll also removes excess water from the cement, .anddraws the latter out into the fibers whereby a more homogeneous product is secured than would otherwise obtain. If desired, a suction box 110 (Fig. 1) may be provided beneath the suction roll and on the opposite side of the belt 35, whereby a similar suction action is secured with reference to the lower layer of fiber.

As the belts pass forwardly between the converging press rolls 46 and 81, the sheet is gradually compressed and moisture is excluded to an extent such that when the belts again diverge from each other (at the rolls 4864) the sheet freely separates from them and is discharged over a slide or doctor 111 (Fig. 1) to a conveyer belt 112. The latter carries it to a suitable table 113 (Fig. 9) where it is cut into sheets of the required length, and these sheets are then stacked in a press 114 of suitable construction and submitted to extremely heavypressure. Upon drying these sheets form tou 'h boards of a hardness sufficient for building purposes, particularly interiors.

It will be noted that the sheet is formed by a continuous process wherein the separate layers of fiber and cement are gradually compacted and brought into intimate bonding relation with each other and the water is nearly all expelled, after which the sheet is cut into lengths and subjected to the exquired. The relation of these steps is important, particularly in that it both provides the speed necessaryfto make the product commercial and prevents the channeling of the material by water that would take place were the pressure suddenly applied. A more intimate bond between the fiber and the cement is also secured.

' Were there no means to prevent it, the material of thesheet would squeeze out to some extent along the edges of the belts 35 and 63-; and in order to overcome this tendency and insure the production of a sheet having sharply defined edges, one of the belts, preferably the belt 63, is paralleled at each edge by a narrow ta e or belt 116 of a thickness equal to or slightly greater.

naaohso l6 and 81. {The tapes may he made integral with the belts if desired. The beltstogether form, it will be seen, a continuous mold surrounding the sheet on all sides.

Suitable pans 120 and 121 are provided for the purpose, respectively, of receiving and conducting away the water extruded by the rollers l6-8l and that used in washing the upper belt.

ltis obvious that many changes may be made without departing from the spirit of our invention, and we do not, therefore, wish to be limited otherwise than as indicated by the subjoined claims.

We claim 1. Means for forming a refractory composition board from wet fibrous material and net. hydraulic cementitious material comprising means for continuously forming a thin moving sheet of loose wet fiber, means foicontinuously applying to the surface of the moving sheet of wet fiber a. relatiyely thicker layer of plastic material consisting of wet hydraulic cement and inert filling material, and means for thereafter compressing the moving wet compound sheen so that thehydraulic plastic material will be forced between the fibers, thus cementing them together and to the main body of the plastic material.

2.- Means for forming a layer of loose wet fiber of substantially uniform thickness throughout and continuously uniting said layer to one surface of a relatively thicker hydraulic plastic mass of substantially uniform thickness throughout. and means for gradually compacting said fibers with the body of the hydraulic plastic materials so that the fibers are cemented to the hydrau lie plastic mass to form a compound board of substantially uniform thickness through out having a reinforced face.

3. ltleans for forming refractory composition board from fibrous material, hydrau" lic cement and water comprising a moving loraminous member, means for distributing-- Wet fibrous material uniformly over the surface of the loraous member, means for continuously applying a heavier layer of material consisting ementially. of Wet hydraulic cement to the layer of fibrous ma'. terial, a series of rolls through which the wet compound layer pawns and with which it directly contacts, whereby itis gradually compacted andgaged and whereby excess Wat/er is excluded. i

l. Means for forming refractory compo sition board from fibimus material and cementitious material comprising a plurality of rats cong liquid of fiber and water, me for continuously separating the fiber from each of the liquid mixtures, for removing it from the rats in the form of t web sheets and for as-- semblingcthe moving sheets in M :5: re-

lation, means for continuously applying a relatively thicker sheet of hydraulic cementitious material between the sheets or" fibrous material, and a series of opposed rollers for gradually compressing the moving compound sheet to force the materials into intimate bonding relation, to gage the thickness of the board and to express excess water therefrom.

5. Means for log refractory composition board from fibrous and hydraulic cementitious materials comprising a rat containing a liquid mixture of fiber and water, a rotatable foraminous collector arranged to dip into the rat and continuously remove a thin sheet of fiber therefrom, means for continuously applying a relatively thicker sheet of hydraulic cement to the fiber sheet, ing compound sheet of fiber andcement is gradually compressed into a M ing sharply defined edges.

6. Means for forming refractory compo .sition board from fibrous and hydraulic cementitious material comprising rat containing aliquid mixture of fiber and water, a rotatable foraous collector arag w to dip into the rat and continuously remove a t sheet oi fiber therefrom, a belt passing over the collector and arranged to remove the collected sheet of material therefrom, means for continuously applying a relatively thicker sheet or hydraulic cement to the fiber sheet, means for impag movement to the belt, and means for compressing the moving compound sheet oi fiber and'cement on the belt into a thin sheet ha ing sharply defined edges.

7. Means for forming protective struc tural sheets from fibrous and hydraulic cementitious materials comprising a rat containing a liquid of fiber and water, collecting means for continually removing a thin sheet of fiber from the rat, means for continually applying a thin sheet of cement to the fiber sheet. belt means by the thin compound sheet is carried, said belt means constituting a mold for one side and two edges of the sheet, and pressure means for compacting the compound sheet shaping the remaining side thereoi't'.

8. Means for log protective structural sheetslrom fibrousand hydraulic cementitious materials comprising a rat containing a liquid mixture of fiber and water, collecting means for continually removing a sheet of fiber from the rat, means for con tinually removing a thin sheet of fiber from the rat, meansior continually applying a sheet of cement to the fiber sheet, belt means by which the thin compound sheet is carried, said belt means constituting a mold for one side and two edges of the sheet, and n. series of rolls arranged gradually decreasing vdistances from the belt and means whereby the movsheet hay- 1 with refer- 1. I

ence to the movement of the latter for compactlng the compound sheet and shaping the remaining side thereof.

9. Means for forming protective structural sheets from fibrous and hydraulic cementltlous materlals comprising a vat containing a liquid mixture of fiber and water,

- the sheet of fiber, and means for gradually compacting the compound sheet of fiber and cement.

10. Means for forming protective structural sheets from fibrous and hydraulic cementitious materials comprising a vat containing a liquid mixture of fiber and water, collecting means for continuously removing a thin sheet of fiber from the vat, moving belt means to which the collected sheet is transferred, a suction roll for continuously applying a thin sheet of cement to the sheet of fiber. said belt means forming a mold for one side and the edges of the compound sheet, and a bed of rollers for gradually compacting the compound sheet.

11. Means for forming refractory composition board from fibrous and cementi tious materials comprising a moving belt, means for applying a thin sheet of wet fiber thereto, means for applying a thin sheet of wet cement to the wet fiber, a bed ofrollers over which the belt passes, a bed of rollers below which the belt passes, said last mentioned bed being located above the first and the rolls thereof being located above the corresponding rolls of the first mentioned bed and in position to contact directly with the upper surface of the sheet whereby the thickness of the sheet is gaged, the rolls of the two beds being located at gradually less distances apart along the line of forward movement of the belt, and means for adjust- ,ing one bed of rolls toward and from the other.

12(Means for forming protective structural sheets from fibrous and cementitious materials comprising a mixer for forming a liquid mixture of the fibrous material, av vat and two pipes for establishing communication between the mixer and the vat, one of the pipes conveying the liquid mixture from the mixer to the vat and the other returning the liquid from the vat to the mixer, a pump connected to one of the pipes to establish circulation, means for continually removing the fiber from the vat in the form of a thin sheet. a mixer for forming a fluid mixture of hydraulic cement and water. a pipe leading from the mixer to the vicinity of the belt, and means for positively feedsheet of wet hydraulic plastic cementitious material to the sheet of fibrous material, said last mentioned means including a movable suction member whereby the wet plastic material is accurately fed. I

1 Means for forming refractory composition board comprising moving foraminous carrying means, means for constantly supplying thereto a thin sheet of wet fiber, and means for constantly applying a thicker sheet of wet hydraulic plastic cementitious material to the sheet of fibrous material, said last mentioned means including means for supplying the plastic material and means for positively distributing said material across the sheet of wet fiber.

15. The process of forming refractory composition board from fibrous and hydraulic cementitious materials which consists in reducing the fibrous material to a statewherein it is suspended in water, continuously removing the fibrous material from the water in the form of thin sheets, continuously combining with the thin sheets of fibrous material a thicker sheet of wet hydraulic cement which constitutes the body of the board, and gradually compressing the moving sheets upon each other, whereby the hydraulic cement is forced between the fibers and brought into intimate bonding relation and whereby excess water is pressed therefrom.

16. The process of forming refractory composition board from fibrous and hydrau-- lic cementitious material which consists in reducing the fibrous material to a. state wherein it is suspended in water, continuously removing the fibrous material from the water in the form of two thin sheets of loose fiber, continuously combining with the loose sheets of fibrous material a. thicker sheet of wet hydraulic cement and inert material, which constitutes the body of the board, and gradually compressing the moving sheets upon each other, whereby the hydraulic cement is forced between the loose fibers cementing them to each other and to the body of the board and whereby excess water is pressed therefrom, whereupon the formed sheets may be removed for further manipulation.

In testimony whereof we have signed this specification.

ROY ALFRED PLU IB. CLARENCE R. WAJED.

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