US2850245A - Grinding apparatus - Google Patents

Grinding apparatus Download PDF

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Publication number
US2850245A
US2850245A US562542A US56254256A US2850245A US 2850245 A US2850245 A US 2850245A US 562542 A US562542 A US 562542A US 56254256 A US56254256 A US 56254256A US 2850245 A US2850245 A US 2850245A
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United States
Prior art keywords
grinding
rotor
zone
grooves
milling
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Expired - Lifetime
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US562542A
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English (en)
Inventor
Gustke Klaus
Kuhls Erich
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ANNI GUENTHER
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ANNI GUENTHER
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Publication date
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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
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/10—Crushing or disintegrating by gyratory or cone crushers concentrically moved; Bell crushers

Definitions

  • the present invention relates to colloid mills with stationary and rotating conical grinding elements, wherein grinding is effected in a plurality of grinding zones.
  • Colloid mills which have found wide use in the chemical and food industries to comminute, homogenize and emnlsify a variety of substances, work either with hard grinding disks or with serrated grinding elements.
  • the arrangement, size and direction of the serrations determines the degree of comminution obtainable by the mill.
  • milling is performed according to this invention in separate and succeeding grinding zones, the ground material being transferred from one zone to the next without backing up and the finest grin-ding being efiected with the least demand on the machine and under low heat development.
  • Fig. 1 is a perspective view, partly broken away, of the stator and rotor of a colloid mill showing four milling zones;
  • Fig. 2 is a vertical section of the colloid mill with vertical adjustment or" the milling elements, the uppermost position of the stator being shown in broken lines;
  • Fig. 3 is a top View of the rotor
  • Fig. 4 is an enlarged top view of a portion of the grooved transfer zone and the roughened fine milling zone.
  • Fig. 5 is a section along line VV of Fig. 4.
  • Zone I Pregrinding Zone II: Coarse grinding Zone III: Transfer and sorting Zone IV: Fine milling The operation of the colloid mill will best be understood by referring to the accompanying drawing:
  • Upward displacement of the material will be substantially eliminated by upwardly tapering vertical serrations 8 of stator 1 and the vertical serrations of the rotor in the pre-grinding zone I. In this zone, the material will be subjected less to a crushing action than to grinding and cutting.
  • the upper edge of the potlike pre-grinder inclines under an angle e from cutting edge 7 to tangential surface 6 to prevent the material from adhering to the grinder at these areas.
  • Cylindrical collar 5 is mounted on stator 1 and partially covers the lateral openings or windows 34; in chamber 3. This arrangement has the purpose of controlling the amount of material immediately before it enters the serrations.
  • the grinding size in such colloid mills may be adjusted by vertically adjusting the spacing of stator 1 and the rotor 4.
  • stator 1 is mounted on the mill housing 11 by means of threaded adjustment ring 32.
  • the ring 12 is rotated by handle 13
  • the stator l is vertically moved on the mill housing to narrow or widen milling gap 14. between the rotor and stator (see full and broken lines in Fig. 2).
  • the coarse grinding zone begins where the serration grooves in and 8 have the greatest depth.
  • the transfer from the pre-grinding zone is effected without jamming or additional heat development.
  • the milling is effected in this zone by serrations whose grooves form respective angles 0 and d with the vertical axis.
  • the direction is determined by the direction of rotation of rotor 4.
  • the material is seized by the tooth segments of the serration and is further comminuted between stator 2 and rotor 4.
  • the grooves are tapered downwardly so that the grain size of the material becomes constantly smaller.
  • the essential feature is the grooves which cross each other at predetermined angles to form tooth segments therebetween.
  • the total cutting surfaces of these segments are larger, the grinding is more thorough and the milling more uniform than in known apparatus of this type.
  • Prior art mills have the disadvantage that most of the material is cut only once, slides immediately downwardly through the vertical grooves and is then finely ground by closelyspaced serrations, placing an added load on the mill and causing concomitant development of considerable heat. These disadvantages are avoided with the above-described arrangement.
  • Zone 111 which is so constructed that only material of a predetermined grain size is received therein while larger particles are comminuted in the slot 14 between the stator and rotor. This will considerably reduce the mechanical and thermal load on the grinders. Therefore, no serrations with cutting action are provided in this zone. If desired, the upper edges of the transfer grooves 15 may be bevelled.
  • Fine milling The uniformly ground material prepared in accordance with the above-described procedure is thus transferred into the fine milling zone IV.
  • the material is turned about in the milling slot itself and is thus further comminuted, which produces a grain size below the width of'the slot.
  • It is essential 'for the fine milling according to the present invention that the rotor and stator are merely provided with rough surfaces in this zone and serrations are eliminated since they would not meet the requirements of fine milling.
  • the surface roughening may be effected mechanically, chemically or electrically.
  • a multiple stage colloid mill comprising, in combination: a stationary mill housing having a frusto-conical interior wall with grinding teeth separated by grooves, a hollow rotor with a frusto-conical exterior wall and an interior wall defining a material inlet chamber, said rotor being mounted within said housing for rotation about a substantially vertical axis and the interior wall of the mill housing being spaced from the exterior wall of the rotor to define a milling gap .therebetween, the wall of the rotor surrounding the materialinlet chamber defining openings for passage of material from the chamber to the milling gap by centrifugal force upon rotation of the rotor and the exterior rotor wall surrounding said chamber having grinding teeth forming an acute angle to the vertical and separated by corresponding grooves, the above mentioned grinding teeth of the housing and the rotor forming a pre-grinding zone of the mill, a coarse grinding zone arranged below the pre-grinding zone, the latter zone being formed by substantially parallelogram-shaped grinding teeth defined by two sets of parallel groove
  • openings for passage of material from the chamber to the milling gap are defined by an interior rotor Wall portion forming an obtuse angle with the interior wall of the housing at one side of theopening and an exterior rotor wall portion forming an acute angle with the interior wall of the housing at the opposite side of the opening, said exterior rotor-wall portion constituting a cutting edge for the material passing from the inlet chamber to the milling gap.
  • a multiple stage colloid mill comprising, in combination: a stationary mill housing having a frusto-conical interior wall with grinding teeth separated by grooves; a hollow rotor with a frusto-conical exterior wall and an interior wall defining a material inlet chamber, said rotor being mounted within the housing for rotation about a substantially vertical axis and the interior wall of the mill housing being spaced from the exterior wall of the rotor to define a milling gap therebetween, the wall of the rotor sulrounding the material inlet chamber defining openings for passage of material from the chamber to the milling gap by centrifugal force upon rotation of the rotor and the exterior rotor wall surrounding said chamber having substantially parallelogram-shaped grinding teeth defined by two sets of parallel grooves, one set of grooves forming acute angles to the vertical and the other set forming acute angles to the horizontal, the ahovementionedgrindingteeth .of the housing and therotor forming a preegrinding zone of the mill; a
  • parallelogram-shaped grinding teeth defined by two sets of parallel grooves in the exterior wall of the rotor, each set of grooves being inclined'at a different angle in relationto the vertical and in relation to the angles of the groovesin the pre-grinding zone, and corresponding grinding teeth in the interior wall of the mill housing; a third zone below the coarse grinding zone and receiving the coarsely ground material therefrom, the third zonebeing formed by generally down!
  • openings for passage of material from the chamber to the milling gap are defined by an interior rotor wall portion forming an obtuse angle with the interior wall of the housing at one side of the opening and an exterior rotor wall portion forming an acute angle with the interior 'wall of the housing at the opposite side of the opening, said exterior rotor wall portion constituting a cuttingedge for the material passing from the inlet chamber to the milling gap.
  • the multiple stage colloid mill of claim 5, comprising a cylindrical collar'mounted on the mill housing and projecting into the hollow rotor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Milling Processes (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Rotary Pumps (AREA)
US562542A 1955-02-02 1956-01-31 Grinding apparatus Expired - Lifetime US2850245A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEP19686A DE1041772B (de) 1955-02-02 1955-02-02 Kolloidmuehle mit kegelstumpffoermigem Rotor
DEP19687A DE1046989B (de) 1955-02-02 1955-02-02 Kolloidmuehle mit einem in einem konischen Gehaeuse um eine lotrechte Achse umlaufenden Rotor
DEP13488A DE1043767B (de) 1955-02-02 1955-02-02 Kolloidmuehle mit einem kegelfoermigen Rotor

Publications (1)

Publication Number Publication Date
US2850245A true US2850245A (en) 1958-09-02

Family

ID=46507819

Family Applications (1)

Application Number Title Priority Date Filing Date
US562542A Expired - Lifetime US2850245A (en) 1955-02-02 1956-01-31 Grinding apparatus

Country Status (7)

Country Link
US (1) US2850245A (enrdf_load_stackoverflow)
BE (1) BE544069A (enrdf_load_stackoverflow)
CH (1) CH343760A (enrdf_load_stackoverflow)
DE (3) DE1041772B (enrdf_load_stackoverflow)
FR (1) FR1147454A (enrdf_load_stackoverflow)
GB (1) GB790340A (enrdf_load_stackoverflow)
NL (3) NL286899A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114308314A (zh) * 2021-12-30 2022-04-12 浙江威肯特智能机械有限公司 一种可调式胶体磨机磨削机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061600B (de) * 1958-09-12 1959-07-16 Mannesmann Fa A Kolloidmuehle mit konischem Rotor
EP3476486B1 (de) * 2017-10-30 2020-07-01 Bühler AG Vorrichtung und verfahren zum zerkleinern von schüttgutkörnern
RU2729826C1 (ru) 2020-02-26 2020-08-12 Общество с ограниченной ответственностью "БиоВи" (ООО "БиоВи") Устройство для измельчения пивной дробины и производственная линия для получения продукта с высоким содержанием белка

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499081A (enrdf_load_stackoverflow) *
US31492A (en) * 1861-02-19 William stewart
US650291A (en) * 1899-09-14 1900-05-22 Frank W Zimmerman Corn-grinder.
US1020712A (en) * 1911-04-05 1912-03-19 Cornelius J Regan Grinding-mill.
US1021950A (en) * 1911-06-16 1912-04-02 William T Shepard Milling-machine.
US1159137A (en) * 1914-04-17 1915-11-02 Franco American Rubber Company Extraction of rubber.
FR584861A (fr) * 1924-08-22 1925-02-17 Moulin pour graines divenses, couleurs, etc.
US2090578A (en) * 1934-07-10 1937-08-17 Eppenbach William Colloidal mill
US2212544A (en) * 1937-11-18 1940-08-27 Albert A Lund Process of preparing chocolate
US2749053A (en) * 1952-04-21 1956-06-05 Probst & Class Multiple stage colloid mill with apertured rotor-top feed means

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE436368C (de) * 1925-03-28 1926-10-30 Sudenburger Maschinenfabrik & Vorrichtung zur Herstellung von kolloiden Stoffen auf mechanischem Wege
US2402170A (en) * 1939-10-13 1946-06-18 Albert A Lund Colloid mill
DE939549C (de) * 1948-10-02 1956-02-23 Adolf Steinbrueckner Kolloidmuehle
DE1034463B (de) * 1952-04-21 1958-07-17 Probst & Class Kolloidmuehle

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499081A (enrdf_load_stackoverflow) *
US31492A (en) * 1861-02-19 William stewart
US650291A (en) * 1899-09-14 1900-05-22 Frank W Zimmerman Corn-grinder.
US1020712A (en) * 1911-04-05 1912-03-19 Cornelius J Regan Grinding-mill.
US1021950A (en) * 1911-06-16 1912-04-02 William T Shepard Milling-machine.
US1159137A (en) * 1914-04-17 1915-11-02 Franco American Rubber Company Extraction of rubber.
FR584861A (fr) * 1924-08-22 1925-02-17 Moulin pour graines divenses, couleurs, etc.
US2090578A (en) * 1934-07-10 1937-08-17 Eppenbach William Colloidal mill
US2212544A (en) * 1937-11-18 1940-08-27 Albert A Lund Process of preparing chocolate
US2749053A (en) * 1952-04-21 1956-06-05 Probst & Class Multiple stage colloid mill with apertured rotor-top feed means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114308314A (zh) * 2021-12-30 2022-04-12 浙江威肯特智能机械有限公司 一种可调式胶体磨机磨削机构
CN114308314B (zh) * 2021-12-30 2023-05-12 浙江威肯特智能机械有限公司 一种可调式胶体磨机磨削机构

Also Published As

Publication number Publication date
DE1046989B (de) 1958-12-18
NL104980C (enrdf_load_stackoverflow) 1900-01-01
DE1041772B (de) 1958-10-23
NL286899A (enrdf_load_stackoverflow) 1900-01-01
NL120666C (enrdf_load_stackoverflow) 1900-01-01
BE544069A (enrdf_load_stackoverflow)
GB790340A (en) 1958-02-05
DE1043767B (de) 1958-11-13
CH343760A (de) 1959-12-31
FR1147454A (fr) 1957-11-26

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