US3206129A - Rod-mills used especially for the manufacture of inks and paints - Google Patents

Rod-mills used especially for the manufacture of inks and paints Download PDF

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Publication number
US3206129A
US3206129A US188170A US18817062A US3206129A US 3206129 A US3206129 A US 3206129A US 188170 A US188170 A US 188170A US 18817062 A US18817062 A US 18817062A US 3206129 A US3206129 A US 3206129A
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United States
Prior art keywords
rod
pressure
cylinder
pulp
cavity
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Expired - Lifetime
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US188170A
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English (en)
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Brizon Jean Marie Annic
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Individual
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Individual
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Priority claimed from FR859575A external-priority patent/FR1310502A/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
    • B02C4/18—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a bar
    • B02C4/22—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a bar specially adapted for milling paste-like material, e.g. paint, chocolate, colloids

Definitions

  • the present invention has for its object to improve the fineness of grinding, but at the same time it permits the output to be increased.
  • the rod consists essentially in providing the rod with a longitudinal cavity, the edges of which bear on the cylinder, the latter being closed at its extremities and supplied with a fiuid under pressure, which may be the pulp itself, one of its constituents, or even any fluid compatible with the said pulp. In this way, the pulp must be crushed between the cylinder and the rod, even when the latter is under high pressure.
  • the usual hopper is provided, at the lower portion of which is fixed the supply conduit of a pump, which is thus put on load by gravity and which feeds the groove in the rod with pulp under pressure; the delivery conduit of the pump is divided up before reaching the rod so as to distribute the pressure uniformly along the said rod.
  • a liquid or pulp under pressure derived from a tank separate from the hopper is delivered into the cavity of the rod at an adequate pressure by a pump intended to create and to maintain in the said cavity a constant value of the pressure selected, which depends on the clamping pressure on the rod and which is necessarily higher when the clamping pressure itself is higher.
  • the liquid delivered by this pump into the cavity may be the same pulp as that contained in the hopper, but it may also be any other consistent liquid or pulp compatible with the said pulp, so that its mixture with the first pulp does not cause any difficulties.
  • this resin can be injected into the cavity of the rod either as it is or as a mixture with a loading material.
  • the resistance offered to the passage of the liquid under the lip of the rod which precedes the cavity is less than the resistance to its passage under the lip which follows the cavity, which naturally favours the increase of pressure in the interior of the said cavity.
  • the intake lip should have a greater width than the outlip, which makes it possible for the inlet lip to have a lower application pressure than the outlet lip.
  • FIG. 1 shows diagrammatically in section at right angles to the axis, a single cylinder grinding machine in accordance with a first form of embodiment of the invention
  • FIG. 2 shows also in section, but to a larger scale, the rod, the cylinder and the bottom of the hopper;
  • FIG. 3 is a perspective view of a rod according to the invention, turned over so as to show the pipes by which it is supplied;
  • FIG. 4 shows diagrammatically a single-cylinder mill in accordance with a second form of embodiment of the invention, in cross-section in a plane perpendicular to the axis of the cylinder;
  • FIG. 5 shows an alternative form of construction, in which the pump is eliminated
  • FIG. 6 is a transverse section to a larger scale of a rod with unequal lips, carrying a pressure gauge.
  • FIG. 1 there is shown in diagrammatic cross-section a grinding mill with a single cylinder.
  • This mill comprises a rotating cylinder 1, a hopper 2 receiving the pulp 3 being treated, a rod 4a of metal or plastic material and a scraper 22 serving to evacuate the product after working.
  • a usual clamping device is constituted by at least one cylinder 5a carried by the frame, in which slides a piston 6, subjected at 7 to a suitable hydraulic pressure and rigidly fixed to a member 8 supported on the rod 4a proper. This pressure device could also be mechanical.
  • the supply device is composed of pipes 12 which may be deformable and which couple the central groove 9 of the rod to a pump 16.
  • Other pipes such as 11 also connect the said pump to a reservoir or tank receiving the pulp to be treated.
  • the pump 14 shown is of the gear type, but it is quite obvious that other types could equally well be employed.
  • the pulp to be treated may be contained in an independent tank and not in the hopper 2.
  • the action on the pulp of the internal pressure and of the friction on the cylinder have opposite directions, but the height of the pulp in the hopper ensures sulficient lubrication.
  • the operator can thus see directly at what moment the operation is completed.
  • the mill may continue to function for a few moments as a conventional single cylinder when the pump is no longer working, without risk of seizure.
  • a machine according to the invention acts like a true grinding machine, although the grinding takes place against the liquid .or pasty mass which fills the cavity in the rod.
  • FIG. '3 shows a rod 40 in 'the inverted position so as to show .its supply conduits.
  • FIG. 4 a second form of embodiment of the invention, characterized in that the rod 4d, arranged at the outlet of a conventional hopper 2 filled with pulp 3 to be treated, is supplied from a tank 16 separate from the hopper, by means of a piston pump 15, preferably actuated by a compressed-air motor 18.
  • the fluid brought under pressure into the cavity 9 of th od n b e ame. pu a h n he h pp bu it can also be any fluid compatible with the said pulp, in particular a liquid of a pulp of a different nature and viscosity and adhesive power of appropriate values which may be higher than those of the pulp itself.
  • the piston 19 of the compressed-air motor 18 which can form a single mechanical unit with the pump 15, 17 of the type utilized for the delivery of thick grease, has a surface area which is greater than that of the piston 17.
  • the pressure of the fluid delivered into the cavity 9 is therefore a multiple of that of the compressed-air acting on the piston 19.
  • the usual distribution mechanism of the motor has not been shown, but the pump is provided with two single-.direetion clapper valves 21 arranged respectively on the admission and delivery conduit systems.
  • a hydraulic fluid under pressure of a type similar to that utilized for the brakes of automobile vehicles is delivered into the cylinders 54 by a master cylinder, the piston of which has an elastic sealing joint and is moved by a screw-adjustment hand-wheel.
  • This master cylinder (not shown) is coupled to the cylinders 5d by pipes '7 which are generally of copper and of a certain length, the expansion and elastic elongation of these pipes under the effect of the pressure, contributing, at the same time as the compressibility of the oil itself, in giving a certain lasticity to the pressure applied to the rod 4d.
  • a pres sure gauge coupled to the delivery of the master cylinder enables the pressure admitted to the cylinders 5 to be checked when the hand-wheel is turned.
  • the hopper is filled and supplied with the pulp or the liquid to be treated, and the mill is started-up with the rod released, that is to say with a slight pressure in the j k afte whi h th s ja ks a e p o re s ve y P vunder pressure in order to force the rod against the cylinder, while at the same time compressed-air is admitted ,to the motor 18 to put the cavity 9 of the rod under pressure, which corresponds to the injection of a small quantity of liquid or pulp into the said cavity, the dimensions of which in vwidth and depth may be relatively small (of the order of a few millimeters).
  • the satisfatCQry working of the machine requires a suitable correspondence betweenthe pressure in the cavity 9 and the pressure in the cylinders 5d.
  • This relation is that for which the pressure tends to become stable in the cavity'9 ofthe rod, at the same time as the compressedvair motor 18 stops of its own accord by equilibrium of the force of the air pressure on the piston 19 of large section and the pressure of the liquid on the piston 17 of smaller section.
  • This stabization of the pressure is probably due to the fairly viscous nature of the pulp to be ground contained in the hopper and of the pulp .or the liquid delivered by the pump into-the cavity 9.
  • the applicant has made comparative tests on a commercial grinder having a cylinder of 300 mm. in diameter with a length of generator line of 600 mm. and a system of pressure on the rod using six hydraulic jacks of such section that a pressure of 160 kg./sq. cm. of the hydraulic fluid admitted to these jacks produces a pressure force on the cylinder by the rod equal to 3 tons.
  • the fineness of grinding increases with the pressure that it is possible to maintain in the groove of the rod, an increase in this pressure necessitating a corresponding increase of the pressure applied to the rod.
  • the single-cylinder machine the numerical characteristics of which have been given above, and a rod provided with a groove of 5 mm. in width, having on each side lips of the same width, the total width of the rod at its contact with the cylinder being therefore mm.
  • the applicant has been able to obtain in the groove a stabilized pressure of 36 kg./sq. cm. for a pressure in the hydraulic jacks of 100 kg./sq. cm., giving a pressure force of 3 tons on the rod.
  • the output is high and the fineness of grinding is excellent.
  • the rod 4e of substantially rectangular section is provided with a longitudinal cavity 9 described above and pressed against the cylinder 1 by the pistons 6 of powerful hydraulic jacks 5 spaced apart along the length of the rod.
  • the rod is preferably mounted vertically, the hopper 2 being displaced sideways which enables the best arrangement to be obtained of the portion of the frame of the machine intended to carry it and to receive the reaction of the high pressure force applied by the jacks.
  • the intake lip 9a is wider than the outlet lip 9b in order to reduce the resistance oltered to the passage of the pulp under the said intake lip (see FIG. 6 showing the transverse section of the rod to a larger scale).
  • Tests have been made with a rod-mill having a cylinder of 300 mm. in diameter and 600 mm. in length, the rod being pressed vertically on the cylinder by five powerful hydraulic jacks.
  • the cavity 9 of the rod used for the test was 8 mm. in width with a width of 5.5 mm. for the intake lip 9a and 2.5 mm. for the outlet lip 9b.
  • a pressure force of 9 (nine) tons applied by the hydraulic jacks on the rod the ressure of the liquid read on a pressure gauge coupled to the interior of the cavity 9 (this pressure gauge 29 can be directly fixed on the rod), increased at the beginning of operation of the machine to kg. per sq. cm. of the interior of the cavity and became stable at that value.
  • the pressure-gauge 20 shows that the pressure in the cavity increases and becomes stable at 160 kg. per sq. cm., the output being reduced to kg. per hour, but with a fineness of grinding of 9 with the north gauge.
  • the adjustment of the pressure force applied to the rod as a function of the various products to be ground is effected by observing the pressure read on the pressure gauge 20 of the rod, since it is this pressure which determines the action of the liquid rod contained in the cavity 9, and in consequence determines the fineness of grinding and also the output of the machine.
  • the invention is not limited to the form of embodiment described. It may be applied to rod-mills comprising a number of cylinders, for example three.
  • the rod referred to can be mounted on the cylinder on which the scraper blade is fitted, on the upstream side of this latter. It can be an advantage to associatethis rod with a hopper or with side cheeks permitting the retention, on the upstream side of the rod, of a small quantity of pulp.
  • a plurality of rods provided with longitudinal grooves or cavities could be combined with a single machine or even with a single cylinder, the pulp passing successively under the grooves which are put under pressure or alternatively a number of parallel grooves or cavities can be provided on the same rod.
  • the invention is extended to cover forms of construction which are equivalent to those which have been described above.
  • a grinding mill for paint and printing ink materials comprising a rotary cylinder, a fixed rod urged by pressure means against and longitudinally along said cylinder, a distributing hopper for the material to be ground closed at its lower extremity by said cylinder and rod, said rod being provided with a longitudinally blind groove closed at each extremity by a solid wall facing said cylinder, and said mill further comprising hydraulic pressure exerting means apart from the pressure exerted by the material in said hopper in communication with a fluid compatible with the material to be ground and with said groove for supplying said fluid under pressure to said groove.
  • a grinding mill according to claim 1, wherein the hydraulic pressure exerting means is a pump connected by supplying conduit means to the lower part of said distributing hopper and thence by delivery conduit means to said groove.
  • a grinding mill comprising liydraulic means for applying pressure to said rod and urging it against said cylinder at a predetermined pressure and pump means for supplying said groove in the rod with and in correspondence with said hydraulic means so that the pressure in the groove stabilizes, whereby the yield at least equalsthat with grooveles rods at apressure 40% less than said predetermined pressure and the tintorial qualities of the pigments are enhanced.
  • said hydraulic pressure exerting means comprises a reciprocating piston-pump actuated by a compressed-air pistonmotor, the whole assembly forming a motor-pump set of the type which automatically starts and stops to maintain a pressure within predetermined limits, said piston pump being connected by supply conduit means to ,a tank distinct from said hopper.
  • a grinding mill according to claim 1, wherein said hopper has a wall against which said rod is applied, said wall being substantially radial and vertical with respect to the cylinder.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
US188170A 1961-04-22 1962-04-17 Rod-mills used especially for the manufacture of inks and paints Expired - Lifetime US3206129A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1222767X 1961-04-22
FR859575A FR1310502A (fr) 1961-04-22 1961-04-22 Perfectionnements aux broyeurs à barre utilisés, notamment, pour la fabrication des encres et peintures

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US3206129A true US3206129A (en) 1965-09-14

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US (1) US3206129A (enrdf_load_stackoverflow)
DE (1) DE1222767B (enrdf_load_stackoverflow)
NL (1) NL277361A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319898A (en) * 1963-05-31 1967-05-16 Brizon Jean Marie Annic Bar-mills used more particularly for the preparation of inks and paints

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523632A (en) * 1924-11-11 1925-01-20 China Frederick John Edwin Minute disintegration of substances
US1713270A (en) * 1926-03-19 1929-05-14 Drysdale Henry Single-roll wet mill
US1926907A (en) * 1929-07-13 1933-09-12 Firm J M Lehmann Single-roll mill for paint and the like
DE606994C (de) * 1933-03-06 1934-12-15 Albert Edward Barrett Einwalzenmuehle
US2024073A (en) * 1933-03-17 1935-12-10 Sonsthagen Asbjorn Roll and bar grinding mill
DE636852C (de) * 1935-01-17 1936-10-16 Ernst A Itterlein Reibbarre fuer Ein- und Mehrwalzenmuehlen
US2361059A (en) * 1941-06-16 1944-10-24 Du Pont Process for manufacturing pigments
DE883225C (de) * 1951-06-14 1953-07-16 Ludwig Schoeffel Einwalzenmaschine mit gegen die Walze radial verstellbarer und in der Beistellage feststellbarer Reibbarre
US2687852A (en) * 1951-08-02 1954-08-31 Vickers Armstrongs Ltd Roll and bar grinding mill
FR1146480A (fr) * 1955-05-17 1957-11-12 Draiswerke Gmbh Perfectionnements apportés aux machines à broyer à un ou plusieurs cylindres

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE461069C (de) * 1926-04-04 1928-06-12 Johann Ehrhardt Feinmuehle mit mehreren Mahlkloetzen
GB319544A (en) * 1928-12-04 1929-09-26 Ernest Arthur White Improvements in mills for grinding paints, enamels, inks and other viscous substances
GB468457A (en) * 1936-01-10 1937-07-06 Asbjorn Sonsthagen An improved device for compressing materials of or into a more or less viscid condition
DE669356C (de) * 1937-06-27 1938-12-23 Springer & Moeller Akt Ges Walzenmuehle mit Reibbarren
DE748660C (de) * 1939-01-01 1944-11-07 Draiswerke Gmbh Walzenmuehle mit einstellbaren Reibbarren
DE946676C (de) * 1952-01-25 1956-08-02 Ludwig Schoeffel Steuerbare hydraulische Andrueckvorrichtung fuer Walzenmaschinen mit mehreren Andrueckstellen
DE1062531B (de) 1955-05-17 1959-07-30 Draiswerke Ges Mit Beschraenkt Einstueckige Reibbarre fuer Walzenreibmaschinen
DE1070477B (enrdf_load_stackoverflow) * 1957-02-11 1959-12-03

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523632A (en) * 1924-11-11 1925-01-20 China Frederick John Edwin Minute disintegration of substances
US1713270A (en) * 1926-03-19 1929-05-14 Drysdale Henry Single-roll wet mill
US1926907A (en) * 1929-07-13 1933-09-12 Firm J M Lehmann Single-roll mill for paint and the like
DE606994C (de) * 1933-03-06 1934-12-15 Albert Edward Barrett Einwalzenmuehle
US2024073A (en) * 1933-03-17 1935-12-10 Sonsthagen Asbjorn Roll and bar grinding mill
DE636852C (de) * 1935-01-17 1936-10-16 Ernst A Itterlein Reibbarre fuer Ein- und Mehrwalzenmuehlen
US2361059A (en) * 1941-06-16 1944-10-24 Du Pont Process for manufacturing pigments
DE883225C (de) * 1951-06-14 1953-07-16 Ludwig Schoeffel Einwalzenmaschine mit gegen die Walze radial verstellbarer und in der Beistellage feststellbarer Reibbarre
US2687852A (en) * 1951-08-02 1954-08-31 Vickers Armstrongs Ltd Roll and bar grinding mill
FR1146480A (fr) * 1955-05-17 1957-11-12 Draiswerke Gmbh Perfectionnements apportés aux machines à broyer à un ou plusieurs cylindres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319898A (en) * 1963-05-31 1967-05-16 Brizon Jean Marie Annic Bar-mills used more particularly for the preparation of inks and paints

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NL277361A (enrdf_load_stackoverflow)
DE1222767B (de) 1966-08-11

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