US3211385A - Flour milling process - Google Patents

Flour milling process Download PDF

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Publication number
US3211385A
US3211385A US309527A US30952763A US3211385A US 3211385 A US3211385 A US 3211385A US 309527 A US309527 A US 309527A US 30952763 A US30952763 A US 30952763A US 3211385 A US3211385 A US 3211385A
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United States
Prior art keywords
particles
milling process
flake
reduction
sequence
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Expired - Lifetime
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US309527A
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English (en)
Inventor
Anthony V Marlow
William A M Allen
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Simon Corrugating Machinery Ltd
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Henry Simon Ltd
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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
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B02C9/04—Systems or sequences of operations; Plant

Definitions

  • This invention relates to a process for the production of flour and particularly to an improved cereal flour milling process.
  • a milling process of the kind generally known as a gradual reduction milling process in which cleaned wheat grains are broken, purified, classified and reduced to acceptable size, and in which the breaking steps and the reduction steps are accomplished in rollermills, the purifying steps are accomplished by aspirated reciprocating sieving machines called purifiers which remove free unattached bran flake-s from the mass of broken grain particles, and the classification steps are accomplished in horizontally gyrating multilevel sieving nnits known as plansifters which are arranged to grade the separated particles of the material undergoing processing in accordance with their size so that the classified particles can be accorded such further reduction as their size makes necessary.
  • the object of this invention is to provide an improved and highly efficient cereal flour milling process which is not subject to the disadvantages before described.
  • a gradual reduction flour milling process of the kind described is characterised in that there is, in communication with the products outlets of the rollermills of at least each of the first and preferably next succeeding stages of the endosperm particle reduction sequence of the process, a centrifugal flakedisrupter of a kind frequently referred to as a pin-mill 3,211,385 Patented Oct. 12, 1965 wherein the products of the associated rollermill are directed on to a rotor element from which in a substantially airborne condition they are thrown by centrifugal force radially outwards and across the circular paths of a plurality of pin extensions of the rotor.
  • the individual particles of material are subjected to internal disrupting stresses arising from rapid accelerations due to random rapid changes in their direction of motion as their inertia carries them from place to place in the confused air currents set up by the orbital motion of the pin extensions of the rotor, and also to impact stresses as a result of innumerable high speed random collisions with other rapidly moving particles which are travelling in dif- 'ferent directions; the stress-producing characteristics of the pin-mill being so adjusted that the comparatively loosely-knit flake aggregates are broken down into separate flour particles, leaving the fibrous impurities such as "bran-flakes and germ pieces substantially intact.
  • FIGURE 1 is a sectional view of a suitable flake-disrupter
  • FIGURE 2 is a flow diagram of the reduction steps of a gradual reduction flour milling process in accordance with the invention.
  • FIGURE 3 is a flow diagram in which the known milling process and that in accordance with the invention are compared.
  • the flake disrupter shown in FIGURE 1 is of a conventional kind known as a Pin-mill that comprises an electric motor 1 on the shaft 2 of which is a boss 3 carrying a rotor element formed of a pair of discs 4 and 5 between which extend a plurality of pins 6 equally spaced near the peripheral boundary of the discs in two concentric circles.
  • the boss 3 and an inner flange 7 on disc 5 form an annular opening 8 through which material, in an airborne condition, is fed from a spout 9 into the space between the discs 4 and 5.
  • the material is thrown by centrifugal force radially outwards and across the circular paths of the plurality of pins 6, where under the influence of the erratic movements of the supporting air, the individual partcles are subjected to internal disrupting stresses arising from rapid accelerations due to random rapid changes in their direction of motion as their inertia carries them from place to place in the confused air currents set up by the orbital motion of the pin extensions of the rotor, and also to impact stresses as a result of innumerable high speed random collisions with other rapidly moving particles which are travelling in different directions.
  • the stress-producing characteristics of the pin-mill are so adjusted that the comparatively looselyknit flake aggregates are broken down into separate flour particles, leaving the fibrous impurities such as bran-flakes and germ pieces substantially intact.
  • the material after treatment passes to the outlet 10.
  • FIGURE 2 is a flow diagram of the reduction steps of a milling process in accordance with the invention, with a capacity of some 120 tons of wheat per 24 hours.
  • the roller mill units comprising one side of a back-to-back double rollermill of conventional 40 inch type are shown at R and except at stages A, B, and C feed directly into a plansifter unit P constituted by one half of a section (or stack) of sieves in a conventional plansifter.
  • the outputs of each group of rollermill units R are each passed to a respective flake-disrupter K as described in FIGURE 1 before passing to the related plansifter unit 'P.
  • Endosperm products from the breaking stages of the milling process enter the particle reduction stages from purifiers at the points indicated as Pu and flour is taken from the process at points indicated as F.
  • FIGURE 3 shows the flow diagram of FIGURE 2 which has superimposed upon it in broken line the units which are saved so that the full line and broken line diagrams taken together, but with h the omission of the three flake-disrupters K, show the conventional milling process. It will be observed that in a conventional milling process utilising 26 rollermill units and 18 plansifter units a total of 9 rollermill units and 6 plansifter units with associated spouting and conveying equipment, is saved by the improved milling process in accordance with the invention.
  • a flour milling process of the kind known as a gradual reduction system in which at least the first stage of the reduction sequence of operations which follow the breaking sequence of operations consists of three steps these being, a first step of subjecting the endosperm particles from the breaking sequence of operations to a milling treatment in a roller mill having smooth rolls, a second step of submitting milled particles from the said first step to flake-disrupting treatment in a centrifugal flake-disrupter wherein the said particles become substantially airborne and are then subjected to such stresses that comparatively loosely-knit flake particles are disrupted into separate smaller particles leaving fibrous impurities such as bran flakes and germ pieces substantially intact, and a third step of classifying the product from the said second step in accordance with particle size by sieving means and directing the resulting separated fractions to appropriate subsequent stages of the reduction sequence.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Crushing And Grinding (AREA)
US309527A 1962-09-18 1963-09-17 Flour milling process Expired - Lifetime US3211385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35441/62A GB1046979A (en) 1962-09-18 1962-09-18 An improved flour milling process

Publications (1)

Publication Number Publication Date
US3211385A true US3211385A (en) 1965-10-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US309527A Expired - Lifetime US3211385A (en) 1962-09-18 1963-09-17 Flour milling process

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US (1) US3211385A (fr)
CH (1) CH404367A (fr)
GB (1) GB1046979A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442826B (sv) * 1984-06-12 1986-02-03 Forenede Bryggerier As Forfarande och apparatur for bearbetning av spannmal (sed)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464212A (en) * 1944-02-10 1949-03-15 Pillsbury Mills Inc Milling process for granular food crop products, including fling impacting in breaking and finishing operations
US2670290A (en) * 1952-03-14 1954-02-23 Nat Oats Company Process for recovery of oat germ from oats
US2941730A (en) * 1954-07-01 1960-06-21 Gen Mills Inc Flour milling process
US3001727A (en) * 1957-11-20 1961-09-26 Dca Food Ind Flour milling process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464212A (en) * 1944-02-10 1949-03-15 Pillsbury Mills Inc Milling process for granular food crop products, including fling impacting in breaking and finishing operations
US2670290A (en) * 1952-03-14 1954-02-23 Nat Oats Company Process for recovery of oat germ from oats
US2941730A (en) * 1954-07-01 1960-06-21 Gen Mills Inc Flour milling process
US3001727A (en) * 1957-11-20 1961-09-26 Dca Food Ind Flour milling process

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Publication number Publication date
CH404367A (fr) 1965-12-15
GB1046979A (en) 1966-10-26

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