US1342231A - Grinding apparatus for the manufacture of wood-pulp - Google Patents

Grinding apparatus for the manufacture of wood-pulp Download PDF

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Publication number
US1342231A
US1342231A US369323A US36932320A US1342231A US 1342231 A US1342231 A US 1342231A US 369323 A US369323 A US 369323A US 36932320 A US36932320 A US 36932320A US 1342231 A US1342231 A US 1342231A
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United States
Prior art keywords
blocks
pressing
stone
pressure
column
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Expired - Lifetime
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US369323A
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English (en)
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Schaanning Peder Christian
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Individual
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Individual
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Priority to DESCH58575D priority Critical patent/DE379718C/de
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Priority to US369323A priority patent/US1342231A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/06—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood powder or sawdust
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices

Definitions

  • Patented J lie 1, 1920.
  • the magazine or a supply channel for the blocks in such a manner that the blocks fall in a directionmore orless across to the forward pressing direction down into'the space behind the blocks gripped by the said grippingmembers as the latter travel forward toward the stone, whereby. the said space.
  • A'second main feature which may advan tageously supplement that mentioned above,
  • Fig. 4 shows a modi ed construction
  • the' said constant pressure automatr placesthe second forward-pressing device operation and thus, without any interruption, takes over the forwarddriving, of the block column at the samemoment .an dto the same degree as the operation of the-first device ceases temporarily.
  • Fig. 3 is an end view of the hydraulic preferably in a horizontal direction from V opposite sides, one pressing devicebeing arrangedat either side.
  • the drawing shows only one of the said pressing devices, 1
  • the grinding apparatus operates continuously to exert a constant pressure upon the blocks and'consequently maintains a constant load on the stone. But of course, this can only be, obtained if the pressing plate 6 is brought into full action at the same momentand to the same degree as the pressure from the gripping members 5.. ceases 71.
  • An accumulator or other source 16 for water mder pressure is through a pipe 17 in constant connection with the inner space of cylinder 11, so that the piston 10 is always subjected to the same forward-pressure.
  • the source 16 is further connected with the inlet 18 of a reversible cook 19, from which one pipe 20 communicates with an outlet and pipes 21 and 22'co1 nmunicate with top and bottom respectively .of the cylinders 9, forced forward or back according as the cojckarm loaded with ,a weight 23 is in'the position a" or in the position 7 respectively.
  • the pressing plate 6 is in fixed connection with both cylinders by means of ribs or so that the pistons 8 canbe walls 24, so that the parts 9, 24, 6, 2 1, 9 form one integral system.
  • the total "area of the two pistons 8 is slightly larger than the area of the piston 10, so that each of the pistons 8, when water under pressure is supplied through the pipes 21 to the top of the cylinders 9, are pressed forward in the direction of the arrows 25, with for instance 550 kg. (consequently in total 1100 kg), whereas the piston 10 is pressed constantly forward with 1000 kg.
  • the two cylinders 9 together will react backwardly with a force of 1100 kg. and this force is, through the medium of the pressing plate 6 and the engaging piece 12, compensated by 1000 kg. on the piston 10 plus 100 kg. pressure on the cylinder 11 at the contacting surface between the foremost end of this cylinder 11 and the piece 12.
  • the stone 1 is always subjected to practically the same pressure from each pressing device, .viz alternately to 1100 and 1000 kg.
  • the difference be as high as 100 kg. It might be suflicient to have a difference of 50 or even 25kg, but it will be most practical that the contacting pressure between the parts 12 and 11 be not too low because the piston 10 should be safely brought to return, after its operating period to its engaging position and because the plate 6 should safely not advance simultaneously with the gripping members 5.
  • the latter would besides be obtained by arranging a releasable stopping device (not shown) for the pressing plate 6. In such case I would obtain a constant pressure of 1100 kg. at any time.
  • a difference of 100 a force 1 of 'kg., however, is without any practical importance, and therefore the arrangement shown in the drawing will be preferable.
  • the two cvlinders 9 may be combined into one cylinder, which maybe of annular cross. section or may be arranged behind the cylinder 11. This arrangement, however, would be less suitable.
  • connections 24L between the. plate 6 and the cylinders 9 may be removed, but in this case I have to use other arrangements in order to bring about the desired condition of dependence between the pressure upon the pistons 8 and the pressure upon the piston 10.
  • An example of such construction is shown in Fig. 4.
  • the top of the cylinders 9 is as before in communication with one side of the cook 19 through a pipe 21, and a pipe 37 conducts from the same pipe 21 to the bottom of the cylinder 11. Further the bottom ofcylinders 9 and the top of cylinder 11 are in communication with the other side of the cook 19 through the pipes 22 and 17 respectively. .In this manner the pistons 8 will be pressed forward, when the piston-10 is pressed back, and vice versa, dependent upon the position of the cock 19.
  • one of the forward pressing devices 5 or 6 When the cock is reversed, one of the forward pressing devices 5 or 6 will be set out of operation about simultaneously with the other device 6 or 5 respecblock column atall events only for a short interval (certainly not; more than for 1 second) will be'without any pressure against the stone. By reversing the cock rapidly this interval. can be considerably reduced.
  • the members '5 are mounted on a parallel motion device comprisingtwoparallel links 26, 27 upon a cross head 28; The latter is attached tothe outer end of a piston rod 29, thepiston 30-ofwhich travels in a cylinder 31 withinthefront end of the piston rod 7.
  • This cylinder isfurther connected by a link 32 to a side arm '33 of the link 27.
  • the two last-named parts 33 and 27 thus form a bell crank lever.
  • V V Theffront and rear end of-the cylinder 31 i is throughpipes3i and respectively con- 7 cross "head 28.
  • the construction'ma'y advantageously be 'madeas shown in Fig. 75, in which the piston rod 7'is made like a'pipe and incloses'the similarly pipe-shaped piston rod 29, so that a suitable intermediate annular space is left between t'he'mq
  • The-piston rod 29 is further extended” rearwardly and projects centrally and easily slidesinto'the bored piston 10.
  • theipistonfrod7 is provided directly in front of thepiston 10 with a lateral hole 39 an d in front, of piston 580 the piston rod '29 is provided with a similar hole 38,
  • the side walls of the magaaine is here formed of parallel rods 36 similar :to a grate, and between these rods the gripping members 5 constructed like knifeshaped teeth, project'intothe pressing compartment. Claims: 1.
  • a grinding apparatus for'the-manufacture of wood pulp
  • a grinding'apparatus for the 'manu-' facture of wood pulp the combination of a grinding stone, a compartment for receiving wooden blocks to be ground, said blocks forming a column'to be pressed against the stone, a forward'pressing device, gripping members operating upon end faces of the blocks, a normally stationary rear wall of the said-compartment, means for moving said wall or a part thereof, said means cooperating with the means for moving the gripping members'to.
  • a supplying device or hopper for supplying blocks-into said compartment and arranged to permit the blocks to feed in a direction more or less across to the forward-pressing direction behind the blocks of the column gripped by the gripping member and in remain constantly filled with blocks forming an extension of the gripped block 7 column.
  • a grinding apparatus for the manufacture of wood pulp the comblnatlon of a grinding stone, a compartment for receiving wooden blocks to be round said blocks forming a column to be pressed against the stone, a forward-pressing device, gripping members operating uponend faces of the blocks, a second forward-pressing device acting upon the outer end of the whole wooden block column, and means for placing the two forward-pressing devices into operation alternately.
  • a grinding apparatus for the manufacture of wood pulp, the combination of a grinding stone, a compartment for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, gripping members operating upon end faces of the blocks, a second forward-pressing device acting upon the outer endof the whole wooden block column, hydraulic cylinders, means for moving the two forward-pressing devices, communications between the top and bottom of said cylinders, and reversible means for controlling the supply of fluid or liquid un der pressure to the cylinders to force one forward-pressing device forwardly when forcing the other device backward, and vice versa.
  • a grinding apparatus for the manufacture of wood pulp, the combination of a grinding stone, a compartment or space for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, gripping members on said forward-pressing device operating upon end faces of the blocks, a second forward-pressing device acting upon the outer end of the whole wooden block column, hydraulic cylinders, means for moving the said .two forward-pressing devices, communications between top and bottom of said cylinders, and a reversible cock or valve for controlling the supply of V fluid or liquid under pressure to the cylinstone, an abutment, and an engaging piece by means of which one of the said devices re acts against said abutment during the action of one of said devices upon the blocks, and through which piece the second device, during its operating period, transmits its pressure to the block column.
  • a grinding apparatus for the manufacture of-wood pulp the combination of a grinding stone, a compartment or space for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, operating members gripping upon end faces of the blocks, a second forward-pressing device, acting alternately with the gripping members for pressing the blocks against the stone, an abutment, an engaging piece by means of which one of the said devices reacts against said abutment during the action of'said device upon the blocks,and through which piece the second device during its operating period transmits its pressure to the block column, and a supplying device or' facture of wood pulp, the combination of a.
  • a second forward-pressing'device acting alternately with the gripping members for pressing the blocks against the stone said second device consisting of a normally stationary rear wall of the said space, means for moving said wall or a part thereof and cooperating means for moving the gripping members to start said wall or part thereof and take over the forwardpressing of the blocks from the moment the gripping members are withdrawn from the end faces of the blocks and until said members have moved. back and taken anew grip at the rear part of the block columnextension,
  • an abutment an engaging piece by means of which one of the said devices react agalnst said abutment during the action of said device upon the blocks, and through which piece the second device, during its operating period, transmits its pressure to the block column and a supplying device or hopper for feeding blocks into said space and arranged to feed the blocks in a direction more or less across to the forward-pressing direction into the space behind the blocks of the column gripped by the gripping members as the latter move forward toward the stone, whereby the said space will remain constantly filled -with blocks forming an extension of the block column.
  • said blocks forming a column to be pressed against the stone, grippingmembers, a for- Ward-pressing device operating said grip pingfmembers upon end faces of the blocks, a seco'rid" forvvard pres'smg device actmgf alrev-satay with the gripping members for pressing, the blocks against the stone, an abutment, an engaging piece bymeans of 1. i H 3 'l n I which one of the s'aicl clev-icesv reacts against 4 I 1 5 said abutment during. the. action of said de; vice upon the hlocks,; and through Which piece the second' device, diiring its operatin'g period; transmits its pressure to.
  • the blocltcol'umn and means for subjecting the engagingipiece and the first: forward-press ingr. device to pressures in the forward'ihl'GCtlOIl, 'said' engagingpiece and sa id second device heing under a constant forward-pressure of a somewhat less amount than the total forivarthpressure upon the first device,
  • a grinding apparatus for the manu facture of wood pulp, the combination of a grinding stone, at compartment or space for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a fl rward pressing device, operating membersgripping upon end faces of the blocks, hydraulically operated mechanisms for pressing forward the gripping iembers, a normally stationary rear wall of the said space for exerting forward-pressure upon the rear end of the whole block column, hyd 'aulic means for moving said wall or part forwardly, an abutment, said wall or part reacting against said abutment and constantly under a somewhat lower hydraulic pressure than the total forwardpressure acting upon the gripping members and which transmits its pressure inversely to the pressure on the gripping members as they become inactive, and a supplying device or hopper for effecting refilling of blocks into said space and arranged to feed the blocks in a direction more or less across to the forward-pressing direction into the space behind the blocks of the column gripped by the gripping members as they move forward toward the
  • a grinding apparatus for the manufacture of wood pulp, the combination of a grinding stone, a compartment or space for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, operating gripping members upon end faces of the blocks, hydraulic cylinders for transmitting forward-pressure to the gripping members.
  • a normally stationary rear wall of the said space for the purpose of exerting forward-pressure upon the rear end of the whole block column
  • a hydraulic cylinder for transmitting forward-pressure to said wall
  • a supply conduit for liquid underpressure for liquid underpressure
  • a reversible connection between said conduit and the ends of thefirst-named cylinders a constant hydraulic connection between said conduit and the cylinder acting upon the said wall, whereby the latter is started and presses the blocks inversely as the gripping members become inactive preparatory to taking a new grip at the rear part of the column extension
  • a supplying device or hopper for feeding blocks into said space and arranged to feed the blocks in a direction more or less across to the forward-pressing direction into the space hehind the blocks of the column gripped by the gripping members, whereby the said space will remain constantlyfilled with an extension of the block blocks forming column.
  • a grinding apparatus for the manufacture of wood pulp, the combination of a grinding stone, a compartment or space for receiving wooden blocks to be ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, gripping members for engaging end faces of the blocks, a hydraulic cylinder, piston and piston rod, said gripping members mounted on, said piston rod, and hy draulic means carried by said piston rod and operating the gripping membersjust before or simultaneously tothe starting of the piston forward, and releasing said members upon a reversal of said piston.
  • a grinding apparatus for the manufacture of wood pulp, the combination of a grinding stone, a compartment or space for receiving wooden blocks toibe ground, saidblocks forming a column to bepressed against the stone, a forward-pressing device, gripping members for engaging end faces of the blocks, a second forward-press.
  • a grindingapparatus for themanufacture of wood pulp the combination of a grinding stone, a compartment or space for, receiving wooden blocks to be'ground, said blocks forming a column to be pressed against the stone, a forward-pressing device, gripping members, a second forwardpre ssing device acting upon the outer end of the whole block column, a hydraulic cylinder, piston and piston rod transmitting forward-pressure; to each gripplng member, the latter being mounted upon sald piston rod, means for placing the sand devices into operation alternately, hydraulic cylinders in mechanical connection with the said piston rods, pistons in the latter cylinders having piston rods, cross heads carried by said latter rods, links pivoted to the cross heads, the gripping members he ing pivoted to the free ends of said links,
  • lateral anms forming part of: the links, links: formingpivotal connection between said lat-- eral arms andzthe latter; piston rod, and come third forward-pressing device acting upon for receiving Wooden blocks to be ground,
  • said blocks forming'a columnzto-be pressed against the stone, a. pair of; forward press ing devices including a hydraulic cylinder, piston and piston rod, gripping members. operating upon end: faces of t-heblocks, a
  • a grinding apparatus for the manufacture of W006i pulp, the combination of a grinding: stone, a compartment or space for receiving Wooden'blocks to be ground, saidblocks forming a column tobe pressed against the stone, a forward-pressing device, gripping members operating upon end faces of the blocks, said members-being'constituted by a number'of teeth, spaced parallel stationary grate-like bars forming the side Walls: for the-block column space or compartment and between which the said teeth project into said space, and a supplying device or hopper for feeding blocks into said space and arranged to feed blocks in a direction more or less acrossto the forwardpressing direction into the space behind the blocks of the column gripped by the gripping members asthe latter are moved forward" toward the stone," whereby the said space will remain constantly filled with inder, for said piston maintaining a constant fiuid, a slidable cylinder connected V to saidpiston, a piston therein having a* pistonrod, gripping devices carriedby. said rod, and means to;
  • a grinding apparatus for th manufacture of: wood pulp, a-compartment or space for receiving the blocks to be ground, a piston behind said'blocks, a-cylinder for said: piston maintaining constant fluid, a slidable cylinder connected to said piston, a pistontherein having: a piston rod,
  • I'Od,fa11d means: to: supply motive fluid t0? opposite side of; said latter piston, the-maximum total pressure of? which is greater than that on. i
  • a grinding apparatus for the manufacture of Wood pulp a compartment or space for receiving the blocks to be ground, gripping fingers, a hydraulic cylinder, having a piston and piston rod, a parallel: motion device mounted on said rod and carrying said. fingers, and
  • reciprocable means acting on the end: faces of blocks to feed them forward; and separate reciprocal feed means acting behindthe block column. in alternationwith the aforesaid means.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US369323A 1920-03-27 1920-03-27 Grinding apparatus for the manufacture of wood-pulp Expired - Lifetime US1342231A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DESCH58575D DE379718C (de) 1920-03-27 Magazinholzschleifer
US369323A US1342231A (en) 1920-03-27 1920-03-27 Grinding apparatus for the manufacture of wood-pulp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DESCH58575D DE379718C (de) 1920-03-27 Magazinholzschleifer
US369323A US1342231A (en) 1920-03-27 1920-03-27 Grinding apparatus for the manufacture of wood-pulp

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US1342231A true US1342231A (en) 1920-06-01

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DE (1) DE379718C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921543A (en) * 1954-03-08 1960-01-19 Mcelvany James Leon Pipe-laying apparatus
US3013292A (en) * 1959-01-28 1961-12-19 Owens Illinois Glass Co Advancer-spacer assembly
US3596841A (en) * 1970-06-02 1971-08-03 Norton Co Grinder for mechanical pulp making

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI72355C (fi) * 1985-06-13 1987-05-11 Kone Oy Anordning foer att goera veddoser av en vedstroem.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921543A (en) * 1954-03-08 1960-01-19 Mcelvany James Leon Pipe-laying apparatus
US3013292A (en) * 1959-01-28 1961-12-19 Owens Illinois Glass Co Advancer-spacer assembly
US3596841A (en) * 1970-06-02 1971-08-03 Norton Co Grinder for mechanical pulp making

Also Published As

Publication number Publication date
DE379718C (de) 1923-08-28

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