EP0063617A2 - Vorrichtung zur proportionalen Beschickung von Feststoffpartikeln - Google Patents

Vorrichtung zur proportionalen Beschickung von Feststoffpartikeln Download PDF

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Publication number
EP0063617A2
EP0063617A2 EP81103063A EP81103063A EP0063617A2 EP 0063617 A2 EP0063617 A2 EP 0063617A2 EP 81103063 A EP81103063 A EP 81103063A EP 81103063 A EP81103063 A EP 81103063A EP 0063617 A2 EP0063617 A2 EP 0063617A2
Authority
EP
European Patent Office
Prior art keywords
feeder
inlet
inlet means
separating means
proportional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81103063A
Other languages
English (en)
French (fr)
Other versions
EP0063617A3 (de
Inventor
Robert Ralph Goins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phillips Petroleum Co
Original Assignee
Phillips Petroleum Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Phillips Petroleum Co filed Critical Phillips Petroleum Co
Priority to EP81103063A priority Critical patent/EP0063617A3/de
Publication of EP0063617A2 publication Critical patent/EP0063617A2/de
Publication of EP0063617A3 publication Critical patent/EP0063617A3/de
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/833—Flow control by valves, e.g. opening intermittently
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/892—Forming a predetermined ratio of the substances to be mixed for solid materials, e.g. using belts, vibrations, hoppers with variable outlets or hoppers with rotating elements, e.g. screws, at their outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/60—Mixing solids with solids

Definitions

  • This invention relates to an apparatus for feeding of particulate solids.
  • colorants can be dyes, organic pigments and inorganic pigments.
  • Colorants can be in the form of dry powders or they can be concentrates with a high loading of color in the polymer used.
  • barrel blending wherein a measured portion of colorant;is admixed by tumbling with a measured portion of natural (uncolored) plastic material.
  • Barrel blending is not well adapted to large-volume applications.
  • Such large-volume blending applications generally utilize large tank blenders wherein measured portions of materials to be blended are placed in the tank blender and material is withdrawn from the tank at a plurality of sampling points so designated as to provide a uniform mixture of particles.
  • Single pass blending is usually not realized in practice due in large part to inherent differences in the natural materials and color concentrates. The difference in pellet size, shape, bulk density and the like generally dictate that such blenders be operated as recycle blenders rather than as single pass blenders. Operations of such blenders as recycle blenders converts such operation from continuous to batch.
  • blended materials Where blending is performed in batch fashion, the blended materials must be stored until they are utilized by the processing (molding, spinning, etc.) machinery.
  • Direct proportionate feed from the storage facility to the processing machinery can be accomplished by the use of weigh belt feeder systems.
  • the simplest such system involves a natural pellet storage hopper and a color concentrate pellet storage hopper with each hopper having its own weigh belt conveyor.
  • the two conveyors discharge into a common receptacle, as for example, the feed hopper of an extruder.
  • Such systems offer many advantages over batch handling systems.
  • the pellet admixture is not stored or held for any appreciable length of time; therefore, there is little chance that the pellets will segregate. Control over the relative amounts of color concentrate and natural material is generally precise; however, such systems are not without drawbacks. They can be expensive and maintenance and repair costs can be high.
  • FIGURE 1 is a perspective view of the proportional feeder of this invention, portions of the apparatus being shown broken away;
  • FIGURE 2 is a cross-sectional view through section 2-2 of FIGURE 1;
  • FIGURES 3-5 are cross-sectional views through section 2-2 of hereinafter described embodiments of this invention;
  • FIGURES 6 and 7 are views of a further particulate feeder in accordance with the invention modified by the addition of a side wall inlet means.
  • a proportional feeder for particulate solids which comprises, in combination, a housing having a vertical upper portion and an inwardly converging lower portion and an unobstructed chamber extending therethrough, first and second inlet means vertically disposed in the upper portion of said housing each having first and second ends, the second ends of each such inlet means being in communication with said unobstructed chamber; separating means disposed between the inlet means to separate the second ends of each inlet means and to divide the area of the upper portion of said unobstructed chamber adjacent the second end of said inlet means into first and second zones, and outlet means disposed in the lower portion oi said converging lower portion and in communication with said unobstructed chamber.
  • the separating means is laterally adjustable between the inlet means, thereby providing for adjustment of the relative areas of the first and second zones.
  • the laterally adjustable separating means has in association therewith adjusting means.
  • the upper portion of the vertical housing is of substantially uniform cross-section and outlet means is disposed in the lower end of the inwardly converging lower portion with flow regu- 5 lating means in association therewith.
  • the separating means is laterally adjustable between the inlet means and is disposed substantially vertically within the chamber.
  • a novel multichambered proportional feeder for particulate solids having adjustable means in association with one of the chambers for the proportional feeding of a further particulate solid material without disturbing the relative proportions of the other particulate solids present in the chamber with which the . adjustable means is associated.
  • the proportional feeder of this invention comprises a housing 2 having a vertical upper portion and a converging lower portion 4 and an unobstructed chamber extending therethrough.
  • First inlet means 10 and second inlet means 12 disposed in the upper portion of said housing 2 with each having first and second ends, the second ends of each inlet means being in communication with the unobstructed chamber within the housing 2;
  • separating means 14 is disposed between the inlet means 10 and 12 thus dividing the upper area of the vertical portion of housing 2 adjacent the second end of each of the inlet means into a first and second zone.
  • the converging lower portion 4 having an upper end and a lower end with the upper end being adjacent the lower end of the lower portion of the vertical portion of housing 2 and in open communication with the unobstructed chamber extending therethrough and outlet means consisting of a vertically disposed housing extending below the terminus of the converging portion 4 of housing 2 and in communication with the unobstructed chamber extending through the housing 2.
  • Outlet means 6 is further provided with a flow regulating means such as slide valve 16.
  • separating means 14 is adjustable, laterally, between inlet means 10 and 12, thereby varying the relative cross-sectional areas of the two zones, A and B, in the upper portion of housing 2, as shown in FIGURE 2.
  • Shown in association with separating means 14 are support means and adjusting means.
  • the support means comprises a support block 18 to which means 14 is attached and support rails 20 on which block 18 rests.
  • the adjusting means comprise connecting means 22, knob 24 and locking means 26.
  • flow means 16 is closed and the feeder is filled with natural pellets through inlet means 10. when the feeder is filled with natural pellets, color concentrate pellets are thereafter supplied to the feeder through inlet means 12. Flow means 16 is then opened and the natural and color concentrate pellets pass through the feeder by gravity flow.
  • the flow rate through outlet means 6 must be no greater than the combined flow capacity into i inlet means 10 and 12. Thus, under normal operating conditions, the limiting flow rate through outlet means 6 will cause the proportional feeder to be continuously full. Under conditions which keep the feeder filled, it has been observed that material in any cross-sectional area across the vertical housing below the separating means will flow uniformly downward therethrough. Thus, the stream of pellets passing through outlet means 6 will contain natural and color pellets in a ratio in proportion to the ratio of the areas of zones one and two as determined by the position of separating means 14.
  • the length of the chamber formed by the vertical housing below separating means 14 is critical only to the extent that such chamber must be of sufficient length that the downward rate of flow of each material is uniform at the lower edge of the separating means through the chamber. In general, the length of the vertical chamber is at least equal to the greatest cross-sectional dimension in any horizontal plane across housing 2.
  • the proportional feeder of this invention can have any convenient cross-sectional shape.
  • the feeder can be rectangular, circular or triangular.
  • the separating means can be a vertical separating plate, as shown in FIGURES 1-5, or it can be a conduit of appropriate size to provide the desired proportioning of particulate materials.
  • the feeder is rectangular in cross-section, with a width to depth ratio in the range of 1:1 to 9:1.
  • Separating means 14 is positioned within and extends across the upper portion of housing 2 below inlet means 10 and 12.
  • the vertical length of separating means 14 is determined by the depth of the valley created by the intersections of the upper solid surfaces of adjacent particulate solids when the feeder is filled with particulate solids when the separating means is not present.
  • the separating means should be of sufficient length to extend at least to a minimum point or distance below such valley as would otherwise form in the absence of the separating means when the feeder is filled with solid particulate materials in order that the solids can "pack",.thus avoiding turbulence at the trailing edge of the separating plate as the materials progress downwardly.
  • the vertical length of separating means 14 below inlet means 10 and 12 is on the order of from 0.2 to 0.3 times the greatest cross-sectional dimension in any horizontal plane across housing 2.
  • separating means 14 is fabricated of a thin sheet material such as stainless steel, and the lower edge of separating means 14 can be beveled to a knife edge, in order to avoid turbulence of the material at the trailing edge of the separating means.
  • the lower edge of separating means 14 is beveled on one side only and the beveled side is disposed facing the zone of greater material flow, i.e., the zone of greater area.
  • the proportional feeder can have more than two inlet means, with the proviso that there be a separating means between adjacent pair of inlet means.
  • a proportional feeder having three inlet means (not shown) corresponding to each of the three zones C, D and E and two separating means 14 and 28.
  • One inlet is provided for natural pellets, one for color concentrate pellets and one for an additive.
  • the separating means 14 between the natural and color concentrate inlets is adjustable, thus providing for adjustment of the natural:color ratio.
  • the separating means 28 between the additive and natural inlets can be adjustable or fixed. In an application where the natural:additive ratio is constant, the separating means 28 is fixed in a predetermined position. :
  • the fixed separating means can also be arranged as shown in FIGURE 4 which illustrates a proportional feeder having three inlet means corresponding to the zones F, G, and H, a fixed separating means 30 and an adjustable separating means 14.
  • the proportional feeder can have inlet means (not shown) for each of the four zones J, K, L and M.
  • a fixed separating means 30 divides the upper portion of housing 2 into two zones wherein the ratio (J+K):(L+M) is constant and wherein the ratios J:K and L:H are fixed or variable according to whether the separating means 32 and 14, respectively, are fixed or variable.
  • the proportional feeder of this invention is generally adapted for use in dispensing particulate solids such as plastic pellets, powders and the like, with precise control over the ratio of one material to another.
  • the proportional feeder of this invention provides proportional control over the materials being fed in the range of 2:1 to 10:1. Larger feed ratios, as for example 100:1, can be employed; however, such ratios are limited by pellet size and shape and the particular materials being fed. Where large feed ratios are desired, two or more proportional feeder units can be used in series. Thus, for example, where a ratio of 99 parts of natural to 1 part of color concentrate is desired, two units providing feed ratios of 9:1 can be used in series, with the first unit feeding the lesser material inlet of the second unit.
  • the apparatus comprises a first proportional feeder 102 having a lower portion 104 converging walls, outlet means 106 in the converging lower portion 104, inlet means 110 and inlet 112 in the vertical upper portion 108, and adjustable separating means 114 positioned between and below inlet means 110 and 112, thereby dividing the upper portion 108 of feeder 102 into two zones.
  • Outlet means 106 is in open communication with the interior chamber 208 of the second proportioning feeder unit 202.
  • Separating means 114 is adjustable laterally between inlet means 110 and 112. Slide valve means 116 and 118 are disposed in inlet means 110 and 112 to control the flow of material through each inlet.
  • the separating means can be mounted on adjusting means as illustrated in FIGURE 1.
  • Second proportional feeder unit 202 is similar to feeder 102 and thus comprises a converging lower portion 204, outlet means 206 in the lower portion, inlet means 210 and 212 in the vertical upper portion 208 along with outlet means 106 of feeder 102 and separating means 214 and 214' positioned between and below inlet means 210, 212 and 106, thereby dividing the upper portion 208 of feeder 202 into three zones.
  • Outlet means 206 is provided with flow regulating means 226.
  • Separating means 214 and 214' are adjustable laterally between inlet means 210, 212 and 106.
  • Slide valve means 216 and 218 are disposed in inlet means 210 and 212 to control the flow of materials through each inlet.
  • the separating means can each be mounted on separate adjusting means as illustrated in FIGURE 1.
  • second feeder unit 202 is provided with a slidably adjustable wall section 220.
  • the bottom of wall section 220 is adapted to be movable along the converging wall surface of wall section 224 in the direction indicated by the inclined arrow appearing in FIGURE ,6.
  • wall 220 in combination with the abutting walls (as illustrated in FIGURE 6 and the cross-sectional view threof in FIGURE 7 along line 7) forms an inlet 222 through which additional feed can be effected without altering the relative proportions of the other materials already in the system.
  • wall 220 is adapted to move 0 to 0.3 times the width of the feeder unit 202.
  • Such an inlet means thus provides a convenient means of recycling reground materials.
  • the movable wall 220 can be returned to a position whereby the interior surface 228 thereof is in line with the interior surface 230 of upper portion 208.
  • a hinged wall section 224 which provides access to the valve means 226 and interior of the second feeder 202 and outlet 206 when required.
  • the initial materials are provided in a manner similar to that previously described for the single unit feeder of FIGURE 1.
  • changes in relative proportions can be effected by appropriate adjustment of the various separation means 114, 214 and 214'.
  • Relative dimensions of each unit 102 and 202 of the apparatus of FIGURE 6 are similar to those provided for the single unit 2 of FIGURE 1.
  • feed rates from about 10 to 30 percent of flow rate in 208 above inlet 222 can be utilized.
  • inlet means 222 When particulate materials are to be introduced to the system, only inlet means 222 should be employed for introduction of the material in order to avoid changing the ratio of components already in the system.
  • the feeder of FIGURE 1 can be modified to provide a movable wall member and inlet such as provided in the lower unit 202 of the apparatus of FIGURE 6.
  • the proportional feeders of this invention can be positioned directly over the feed hopper of an extruder. If desired, a pellet blender can be positioned between the proportional feeder and the extruder feed hopper. Alternatively, the outlet stream of the proportional feeder can discharge to an air conveyor system which carries the pellets to the extruder feed hopper.
  • Housing 2, 102 or 202 can be fabricated from any suitable material.
  • materials which can be used to fabricate the housing include aluminum, steel, glass, polyacrylic sheet and the like, as well as combinations thereof.
  • the inner surfaces of the feeders of this invention i.e., the surfaces in contact with the materials being fed, should not provide any impediment to downward flow of the solid materials.
  • the inner surfaces can be coated or covered with a low-friction material such as polyethylene, poly(phenylene sulfide), polytetrafluoroethylene and the like as shown in FIGURE 1. (25).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP81103063A 1981-04-23 1981-04-23 Vorrichtung zur proportionalen Beschickung von Feststoffpartikeln Withdrawn EP0063617A3 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81103063A EP0063617A3 (de) 1981-04-23 1981-04-23 Vorrichtung zur proportionalen Beschickung von Feststoffpartikeln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81103063A EP0063617A3 (de) 1981-04-23 1981-04-23 Vorrichtung zur proportionalen Beschickung von Feststoffpartikeln

Publications (2)

Publication Number Publication Date
EP0063617A2 true EP0063617A2 (de) 1982-11-03
EP0063617A3 EP0063617A3 (de) 1983-10-12

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345426C (de) *
DE364942C (de) * 1922-12-05 E W Stoll Vorrichtung zur gleichzeitigen Zuteilung verschiedener Gueter in einstellbarem Mengenverhaeltnis
FR594673A (fr) * 1925-03-07 1925-09-17 Concasseur mélangeur distributeur
GB272421A (en) * 1927-02-15 1927-06-16 Blaw Knox Co Improved method of and apparatus for measuring bulk material
US1709211A (en) * 1926-11-23 1929-04-16 James Alva Butler Material batcher
DE911130C (de) * 1951-04-13 1954-05-10 Paul August Dosierschnecke, insbesondere fuer Mischmaschinen
DE1093178B (de) * 1958-12-02 1960-11-17 Joachim Kreyenborg Kraftfuttermischanlage fuer landwirtschaftliche Erzeugnisse
US3174652A (en) * 1963-04-01 1965-03-23 Anderson Bros Mfg Co Multiple semi-fluid dispensing nozzle having adjustable vanes
GB1272571A (en) * 1968-01-29 1972-05-03 Nat Res Dev Improvements in or relating to the metering and feeding of granular, powdered and other particulate materials
US3743143A (en) * 1971-09-10 1973-07-03 Leesona Corp Apparatus for extruding plastic material
FR2300610A1 (fr) * 1975-02-14 1976-09-10 Saint Omer Fonderies Construct Dispositif pour le melange de produits pulverulents
DE2812092A1 (de) * 1978-03-20 1979-10-04 Peters Ag Claudius Vorrichtung zum schwerkraftmischen von pulverfoermigem bis koernigem gut

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE345426C (de) *
DE364942C (de) * 1922-12-05 E W Stoll Vorrichtung zur gleichzeitigen Zuteilung verschiedener Gueter in einstellbarem Mengenverhaeltnis
FR594673A (fr) * 1925-03-07 1925-09-17 Concasseur mélangeur distributeur
US1709211A (en) * 1926-11-23 1929-04-16 James Alva Butler Material batcher
GB272421A (en) * 1927-02-15 1927-06-16 Blaw Knox Co Improved method of and apparatus for measuring bulk material
DE911130C (de) * 1951-04-13 1954-05-10 Paul August Dosierschnecke, insbesondere fuer Mischmaschinen
DE1093178B (de) * 1958-12-02 1960-11-17 Joachim Kreyenborg Kraftfuttermischanlage fuer landwirtschaftliche Erzeugnisse
US3174652A (en) * 1963-04-01 1965-03-23 Anderson Bros Mfg Co Multiple semi-fluid dispensing nozzle having adjustable vanes
GB1272571A (en) * 1968-01-29 1972-05-03 Nat Res Dev Improvements in or relating to the metering and feeding of granular, powdered and other particulate materials
US3743143A (en) * 1971-09-10 1973-07-03 Leesona Corp Apparatus for extruding plastic material
FR2300610A1 (fr) * 1975-02-14 1976-09-10 Saint Omer Fonderies Construct Dispositif pour le melange de produits pulverulents
DE2812092A1 (de) * 1978-03-20 1979-10-04 Peters Ag Claudius Vorrichtung zum schwerkraftmischen von pulverfoermigem bis koernigem gut

Also Published As

Publication number Publication date
EP0063617A3 (de) 1983-10-12

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Inventor name: GOINS, ROBERT RALPH