US20190084779A1 - Tower configuration gravimetric blender and receiver for use therewith - Google Patents

Tower configuration gravimetric blender and receiver for use therewith Download PDF

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Publication number
US20190084779A1
US20190084779A1 US16/186,858 US201816186858A US2019084779A1 US 20190084779 A1 US20190084779 A1 US 20190084779A1 US 201816186858 A US201816186858 A US 201816186858A US 2019084779 A1 US2019084779 A1 US 2019084779A1
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United States
Prior art keywords
vacuum
receiver
resin material
granular resin
outlet
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Abandoned
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US16/186,858
Inventor
Stephen B. Maguire
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Individual
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Individual
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Publication date
Priority claimed from US29/580,163 external-priority patent/USD807414S1/en
Application filed by Individual filed Critical Individual
Priority to US16/186,858 priority Critical patent/US20190084779A1/en
Publication of US20190084779A1 publication Critical patent/US20190084779A1/en
Abandoned legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/24Gas suction systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/60Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/72Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/285Feeding the extrusion material to the extruder
    • B29C48/288Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01GWEIGHING
    • G01G13/00Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/02Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22Component parts, details or accessories; Auxiliary operations
    • B29B7/24Component parts, details or accessories; Auxiliary operations for feeding
    • B29B7/242Component parts, details or accessories; Auxiliary operations for feeding in measured doses
    • B29B7/244Component parts, details or accessories; Auxiliary operations for feeding in measured doses of several materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34Details
    • B65G53/36Arrangements of containers

Definitions

  • air/vacuum “vacuum/air” and “air/vacuum stream,” and the like are used synonymously and interchangeably herein to denote a moving stream of air, at sub-atmospheric pressure, drawn by a vacuum pump.
  • Such moving “air/vacuum” streams are conventionally used to convey granular plastic resin material in facilities in which the granular plastic resin is molded or extruded into finished or semi-finished plastic parts.
  • resin/vacuum stream and variations thereof such as “granular resin material/vacuum stream” are used to denote such a high speed stream of air or “vacuum” carrying granules of resin material. Sometimes herein the resin is said to be “entrained” in the moving air/vacuum stream.
  • process machine denotes collectively compression molding machines, injection molding machines and Extruders.
  • Receiveiver is a term widely used in the plastics industry to denote devices that temporarily hold granular plastic resin material before the granular plastic resin material is loaded into a hopper for subsequent processing by a compression or injection molding press or an extruder.
  • Receivers typically include a vacuum chamber that effectively pulls granular plastic resin material into the receiver due to vacuum existing within the vacuum chamber.
  • a vacuum pump is directly or indirectly connected to the receiver to create the vacuum required to pull granular plastic resin material into the receiver. This facilitates moving the granular plastic resin material from a typically remote location to the receiver, which typically feeds a hopper.
  • the receiver, and the vacuum pump are typically part of a larger resin conveying system that conveys the granular plastic resin from a supply to the receiver.
  • Receivers may be located over surge bins or over other temporary storage units in addition to hoppers.
  • Receivers typically load in cycles. Specifically, the receiver loads with granular plastic resin material and then discharges the granular plastic resin material in one operating cycle. Accordingly, a receiver requires a collection bin or surge hopper below the receiver to collect the falling granular plastic resin material to be fed to the process machine.
  • the vacuum source is remote, namely it is not integrated into the receiver itself.
  • the receiver in its most simple, elementary form, is a simple chamber that has a vacuum line connected to it to pull air from the chamber to create vacuum inside the chamber. The vacuum then draws granular plastic resin material into the chamber portion of the receiver.
  • the receiver accordingly has a material line connected to it for granular plastic resin material to be pulled by the vacuum into a storage chamber portion of the receiver. Since the receiver has a storage portion with a relatively large volume and a large cross-sectional area relative to the conduit through which the air/vacuum and granular resin material mixture travels, when the granular resin material/vacuum stream mixture reaches the receiver interior, speed of the moving air/vacuum stream drops. The kinetic energy of the stream is no longer sufficient to carry the granular resin, so the resin falls to the bottom of the receiver.
  • This invention provides a gravimetric blender of a different design, sometimes referred to herein as a “tower,” because the gravimetric blender of this invention has a distinctive central “tower-like” structure supporting a vacuum power unit, which will usually be a vacuum pump.
  • the gravimetric blender accommodates up to four feeders, which may be gravimetric feeders, auger feeders, or some other type of feeder. All of the feeders may run simultaneously, or individually intermittently, with each feeder delivering material at a controlled rate to provide the correct blend to be provided as output by the gravimetric blender.
  • the hoppers of the gravimetric blender are preferably mounted on load cells so that the rate of loss of weight of material within the hopper can be continuously detected. Using feedback, preferably controlled by a microprocessor, metering rate of material from each hopper can be accurately regulated to provide the correct blend of material output by the gravimetric blender.
  • auger feeders are preferably used and are preferably mounted around a common center to meter material to a central point in the support structure for the tower portion of the blender.
  • the gravimetric blender of the invention incorporates an integrated design in which a receiver mounts directly over each hopper, with the receivers and the hoppers being integrated into the overall design.
  • a single power unit providing a vacuum source for all of the receivers. This results in loading the hoppers using a small, “central” system, in which a single power source serves multiple receivers, which in turn feed associated individual hoppers. Having multiple receivers, hoppers, feeders, and a single vacuum power source, all contained in one integrated unit, provides great operating efficiencies and saves floor space, which is often at a premium in a molding or extruding facility.
  • the location of the power unit, and the manner in which the power unit connects to the receivers saves space and facilitates maintenance and/or replacement of a receiver and/or the power unit (which is preferably a vacuum pump) when required.
  • each receiver has only a single tube passing through it.
  • This single tube serves as the vacuum outlet from the receiver at one end of the tube.
  • the tube serves as the resin material/vacuum stream inlet to the receiver.
  • Another feature of the invention is the connection of the receivers to the vacuum source without tubing.
  • the receiver-vacuum source connection vertically supports the receiver without the receiver needing a supporting base.
  • a tall, centrally located tubular tower-like structure rises from the main base to above the receivers.
  • the receivers connect by a structure conduit connection to the tower.
  • the power unit typically a vacuum pump, is preferably on top of the tower.
  • the tower connects the vacuum pump to the receivers.
  • An air cylinder located inside a single tube within each receiver serves to open or close the vacuum port, which is within the and a part of the conduit connection to the central tower-like structure when a hopper associated with the receiver calls for material, with the receiver being actuated and controlled by a microprocessor.
  • the actuating air cylinder is enclosed within a single tube in each receiver.
  • a steel plug in the center of the tube serves to mount the air cylinder within the tube while also separating the tube ends from one another so that one end of the tube can be devoted to the vacuum connection, which is air/vacuum flow only, while the other end of the tube can serve as the resin material/vacuum stream inlet, into which a mix of high speed vacuum/air and granular resin material flows.
  • the plug desirably has a tapered deflector surface so that granular resin material entering the receiver in the resin material/vacuum stream is deflected downwardly into the receiver interior.
  • the plug is desirably steel with the tapered deflector end surface serving as a wear point, taking the brunt of the resin impact with abrasion resulting, which is a factor in receiver design.
  • Load cells and an associated microprocessor detect when the amount of granular resin material in one or more of the hoppers is excessively low and direct the power unit, typically and preferably a vacuum pump, to turn on so that a receiver associated with the hopper is actuated.
  • the microprocessor and associated controls further provide for the conveying of granular resin material into each receiver to remain in effect for an appropriate time period for that particular receiver-hopper combination.
  • the time for conveying and loading each receiver-hopper combination may be set by pressing and holding a button during the individual receiver load cycle, with release of the button setting the load time for that particular receiver within the microprocessor memory.
  • the tower design locates a filter blow-off device on top of the tower, just under the vacuum pump.
  • the vacuum pump is mounted on the upper surface of a hinged plate; the filter blow-off device is mounted on the underside of the plate.
  • the hinged plate is tilted about a hinge to open the top of the tower, the filter blow-off device retracts out of the way and the filter, which is located within the tower below the blow-off device, is visible for inspection and replacement, if necessary.
  • the filter traps any dust in the vacuum air flow.
  • the blow-off device blows the dust off the filter; the dust falls to the bottom of the tower interior.
  • a port with a check disk which opens on pressure but closes on vacuum.
  • the weight of the dust opens the check disk and the dust drops into the granular resin material mix below. No collection vessel is required as the dust is consumed by the process machine, together with the granular material provided to the machine.
  • At least one receiver connects to the vertically oriented conduit and preferably is laterally supported thereby.
  • the receiver is preferably positioned vertically below the vacuum pump for vacuum draw by the vacuum pump through the receiver via the conduit, with the receiver having a vacuum outlet to the conduit as a part of the structure supporting connection to the conduit.
  • the receiver preferably has a granular resin material outlet, preferably at the receiver bottom.
  • a flap valve at the receiver bottom preferably closes responsively to vacuum drawn within the receiver and preferably opens responsively to weight of resin material thereon in the absence of vacuum draw within the receiver.
  • a hopper is located preferably below the receiver for receipt of resin material having preferably been temporarily stored in the receiver, with the hopper receiving the resin material preferably upon weight of resin material in the hopper reaching a preselected low value.
  • the load cell senses weight of resin material in the hopper.
  • the microprocessor preferably actuates the air cylinder to move the valve plate into position to open the vacuum outlet from the tube to the vertically oriented conduit upon weight of resin material in the hopper reaching a low level, where granular resin material in the hopper must be replenished. Vacuum drawn within the tube pulls the granular resin material vacuum stream into the receiver, delivering granular resin material to the receiver for temporary storage therein and delivery to the associated hopper below.
  • a feeder located below each hopper serves to convey material received from the hopper to a discharge chamber for combination with material from other hoppers prior to delivery to a process machine.
  • this invention provides a receiver for temporary storage of granular resin material preparatory to delivery to a process machine for molding or extrusion.
  • the receiver preferably includes a receptacle having a resin material/vacuum stream inlet, a vacuum outlet, and a resin material outlet preferably located at the receptacle bottom.
  • the receiver preferably further includes a tube connected to and extending between the resin material/vacuum stream inlet and the vacuum outlet.
  • the tube includes an air cylinder within the tube, a valve in the form of a plate connected to the air cylinder, with the plate being positioned to close the vacuum outlet preferably upon actuation of the air cylinder.
  • the tube further includes a plug for downwardly deflecting resin material carried by the resin material/vacuum drawn stream entering the receptacle via the inlet.
  • the receiver yet further preferably includes a flap valve at the receptacle bottom. The flap valve preferably closes responsively to vacuum drawn within the receptacle, but preferably opens responsively to weight of resin material thereon in the absence of vacuum drawn within the receptacle.
  • the receiver tube further desirably includes a first aperture in the tube wall, with the aperture being located upstream of the vacuum outlet, for vacuum propagation throughout the receptacle upon the air cylinder being de-energized.
  • the receiver tube further desirably includes a screened second aperture facing downwardly in the tube wall, located upstream of the plug, for downward discharge of granular resin material deflected by the plug upon the resin material/vacuum stream impinging the plug.
  • this invention provides apparatus for delivery of granular material carried by a pressurized air or vacuum powered stream, where the apparatus includes an inlet member having a passageway extending therethrough.
  • the apparatus preferably further includes a central body connected to the inlet member, with the central body having a passageway therethrough communicating with the inlet member passageway, and having a lateral opening formed in the central body passageway.
  • the apparatus yet further includes, in this aspect of the invention, an outlet member, connected to the central body, having a passageway extending therethrough, communicating with the central body passageway remotely from the inlet member passageway.
  • the apparatus yet further includes an actuator housed within the central body passageway and connected to the central body, the actuator having a closure member that moves upon energization of the actuator to close the outlet member.
  • the apparatus still yet further includes a plug connected to the central body and facing the inlet member for deflecting, towards the lateral opening, the granular material entering the central body as carried by the pressurized air or vacuum stream through the inlet member.
  • the inlet member, the central body and the outlet member are all tubular.
  • the closure member includes a plate for moving against the outlet member passageway thereby to close the same.
  • this invention provides a method for gravimetrically blending a plurality of granular materials where the method includes providing a vacuum source. The method proceeds with drawing a vacuum stream upwardly through a vertically oriented conduit and optionally positioning a filter in the conduit. The method yet further proceeds by providing a plurality of receivers laterally connected to and supported by the conduit, with interiors of the receivers communicating with the conduit interior via the lateral support connection.
  • the method still yet further proceeds by drawing separate granular material/vacuum streams into each of the receivers through tubes leading into the receivers, where the granular material/vacuum streams are drawn preferably responsively to vacuum drawn by the single vacuum source through the vertically oriented conduit.
  • the tubes connect with the conduit at juncture of the receivers and the vertically oriented conduit, with the vacuum source drawing vacuum in a receiver via a first aperture in the tube.
  • Each receiver has only a single such tube associated with it.
  • the method yet further proceeds by positioning a plug within each tube to downwardly deflect the incoming granular material/vacuum stream drawn by the vacuum source.
  • the method yet further proceeds preferably by halting vacuum draw in a receiver hopper by closing a valve at juncture of the receiver and the conduit, the valve preferably being powered by an air cylinder within the tube, the valve being downstream of the apertures in the tube, relatively closer to the vacuum source.
  • the method yet further proceeds preferably by maintaining a flap valve closed in the bottom of each receiver by a continuing draw of vacuum in the receiver, thereby preventing downward flow of granular material out of the receiver into a hopper below the receiver.
  • the method still further proceeds by sensing material weight in the hopper using a load cell and actuating the air cylinder, preferably using a microprocessor receiving the weight signal from the load cell, to halt vacuum draw within the receiver, thereby permitting weight of material in the receiver to open the flap valve for downward flow of material out of the receiver and into the hopper below.
  • FIG. 1 is a front elevation of a tower configuration gravimetric blender manifesting aspects of the invention.
  • FIG. 2 is a top view of the tower configuration gravimetric blender illustrated in FIG. 1 .
  • FIG. 3 is a left front quarter isometric view of the tower configuration gravimetric blender illustrated in FIGS. 1 and 2 .
  • FIG. 4 is an isometric view of one of the tower risers from which a vertically oriented conduit portion of the gravimetric blender illustrated in FIGS. 1, 2 and 3 is constructed.
  • FIG. 5 is a left front quarter isometric view of the vacuum motor and tower portion of the tower configuration gravimetric blender illustrated in FIGS. 1, 2 and 3 .
  • FIG. 6 is an isometric drawing of a receiver portion only of the tower configuration gravimetric blender illustrated in FIGS. 1 through 4 .
  • FIG. 7 is a front elevation similar to FIG. 1 but with only the left side of the tower configuration gravimetric blender shown in vertical section, with the section taken at lines and arrows VII-VII in FIG. 2 .
  • FIG. 8 is a broken away schematic diagrammatic view of the upper portion of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3 and 7 with vacuum stream and resin material flows within the blender being depicted.
  • FIG. 9 is a schematic front view, in elevation, of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3, 7 and 8 with portions of the tower configuration gravimetric blender brown away to show internal parts and details.
  • FIG. 10 is an isometric view showing the tilting opening of the top upper section of the tower configuration gravimetric blender according to the invention.
  • FIG. 11 is a broken side sectional view, taken at lines and arrows XI-XI in FIG. 10 , of the top portion of the tower configuration gravimetric blender, showing the tilting opening of the top of the tower section.
  • FIG. 12 is a partially broken isometric view taken at lines and arrows XII-XII in FIG. 13 , showing a hopper, load cell and load cell supporting structure portion of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3, and 7 through 11 .
  • FIG. 13 is a partial sectional view showing details of the hopper support structure, the load cell support structure and one of the material feeders.
  • Tower configuration gravimetric blender 10 includes a vertically oriented conduit 12 with a plurality of receivers 14 , preferably three as shown in FIGS. 1, 2 and 3 , connected to and supported by vertically oriented conduit 12 .
  • a hopper 16 positioned below each receiver 14 to receive granular plastic resin material or other granular material from an associated receiver 14 by downward flow from the associated receiver 14 .
  • a feeder Positioned below each hopper 16 is a feeder designated generally 18 .
  • Feeder 18 laterally conveys granular plastic resin material received vertically from hopper 16 to a tower bin assembly 40 from which the granular resin material is fed, typically by gravity or pneumatically, to a process machine for molding or extrusion.
  • the process machine is not shown in the drawings.
  • a vacuum source preferably a vacuum pump, is designated generally 20 and sits atop vertically oriented conduit 12 as illustrated in FIGS. 1 and 3 .
  • Vacuum pump 20 draws vacuum in vertically oriented conduit 12 thereby to draw a resin/vacuum stream from a resin supply, not shown in the drawings, into receivers 14 of tower configuration gravimetric blender 10 and thereby deliver granular resin material to hoppers 16 in the manner described below.
  • Receivers 14 are each secured to vertically oriented conduit 12 by receiver support fittings 22 which are preferably generally hollow and cylindrical in shape, as illustrated in FIG. 6 .
  • Each receiver 14 includes a single inlet tube portion 24 serving as an inlet to receiver 14 for the resin/vacuum stream. There is one inlet tube portion 24 for each receiver 14 .
  • each inlet tube portion 24 providing a resin/vacuum stream to a receiver 14 has an inlet end 26 at which the resin/vacuum stream enters the respective inlet tube portion 24 and hence the respective receiver 14 .
  • the inflow of the resin/vacuum stream is depicted schematically in FIG. 8 .
  • the resin/vacuum stream encounters a plug 28 having a deflection surface 54 oriented at approximately 45 degrees with respect to the axis of inlet tube portion 24 and facing inlet end 26 of inlet tube portion 24 .
  • Plug 28 is preferably solid and is most preferably steel to be highly wear-resistant with respect to the resin/vacuum stream which impinges plug 28 , particularly impinging the angled preferably planar deflection surface 54 . As the resin/vacuum stream impinges deflection surface 54 , the granules of resin material lose kinetic energy due to collision with deflection surface 54 and fall downwardly, due to their weight, into the lower portion of receiver 14 .
  • each tube 25 in a receiver 14 Located within and fixed to each tube 25 in a receiver 14 is an air cylinder 30 which is desirably also fixed by a pin or other connection to an associated plug 28 .
  • a resin material outlet 32 At the bottom of each receiver 14 is a resin material outlet 32 via which resin material collected within receiver 14 may empty out of receiver 14 , flowing downwardly into hopper 16 located directly below receiver 14 . Such flow of material is depicted schematically in FIG. 8 in the left hand receiver 14 .
  • a dump flap 56 is connected to each receiver 14 and is located at the receiver bottom outlet 32 , covering and closing resin material outlet 32 when vacuum is drawn within receiver 14 . In response to such vacuum draw within receiver 14 , dump flap 56 closes resin material outlet 32 . The vacuum is sufficient to retain dump flap 56 in place thereby precluding any downward flow of resin material out of receiver 14 so long as vacuum is drawn within receiver 14 .
  • each tube 25 opposite from inlet end 26 defines an air/vacuum passageway or outlet 34 from tube 25 into vertically oriented conduit 12 .
  • Air cylinder 30 includes a shaft 36 .
  • shaft 36 When air cylinder 30 is actuated, shaft 36 extends outwardly from cylinder 30 thereby forcing a plate 38 , which is fixed to the end of shaft 36 , against the outlet end 34 of tube 25 , thereby closing tube 25 and halting draw of vacuum within receiver 14 .
  • Cone cover 52 Connected to each receiver 14 close to the lower portion thereof is a cone, sometimes referred to as a cone cover 52 .
  • Cone cover 52 precludes any upward escape of resin material from hopper 16 , as resin material flows downwardly into hopper 16 from receiver 14 . (If hopper 16 is reasonably full, the granular material tends to bounce upwardly or diagonally upon falling downwardly out of receiver 14 and striking granular material already in hopper 16 .) Additionally, cone cover 52 limits spread of dust throughout the processing facility.
  • vertically oriented conduit 12 is preferably fabricated from two risers 42 , one of which is illustrated in FIG. 4 .
  • Risers 42 are preferably secured together by bolts, one of which is indicated 64 in FIG. 5 showing the “Tower.”
  • each receiver 14 includes a receptacle portion 48 for receiving and holding the granular resin material conveyed into receiver 14 .
  • Each receiver 14 also includes a lid portion 50 covering the upper opening of receptacle 48 , as illustrated in FIG. 6 .
  • Manually actuable lever-type fittings 66 secure lid 50 to receptacle 48 in an airtight manner to facilitate draw of vacuum within receiver 14 .
  • receptacle portion 48 is of generally conical configuration at the lower portion thereof with the conical portion denoted 68 .
  • Receiver 14 further has an upper cylindrical portion 70 to which lid 50 fits and is held in place by fittings 66 .
  • Inlet tube portion 24 enters receiver 14 laterally through cylindrical portion 70 of receiver 14 as illustrated in FIG. 6 .
  • Suitable airtight cylindrical fittings 94 are secured to cylindrical portion 70 of receiver 14 and are provided where inlet tube portion 24 enters receiver 14 to provide a tight seal, to facilitate the draw of vacuum and thereby entry of the granular resin material/vacuum stream into the interior of receiver 14 .
  • Tower cylindrical fitting 74 Secured to the upper end of vertically oriented conduit 12 or “the Tower” is a tower cylindrical fitting designated generally 74 and illustrated in FIGS. 7, 8, 9, 10 and 11 .
  • Tower cylindrical fitting 74 sometimes referred to as the tower vacuum base component, is desirably secured to horizontal flanges 80 preferably by screws or nuts and bolts as shown in FIGS. 8 and 9 .
  • Each horizontal flange 80 has two parts, designated 202 and 204 in FIG. 4 , formed on each of the two risers 42 that are bolted together to form vertically oriented conduit 12 , namely “the Tower”.
  • each of the two tower risers 42 that form vertically oriented conduit 12 On the top extremity of each of the two tower risers 42 that form vertically oriented conduit 12 are the pair of horizontal flanges 80 that together form a larger horizontal plate 82 ; the two parts 202 , 204 of horizontal flanges 80 are coplanar.
  • the two horizontal flanges 80 contact one another, as risers 42 are bolted or screwed together, to form a horizontal plate 82 , which effectively forms a flat, planar mounting surface for a tower cylindrical fitting 74 .
  • Nut and bolt combinations that retain tower cylindrical fitting 74 on horizontal plate 82 are shown but not numbered in FIGS. 8 and 9 . When the nuts and bolts have secured tower cylindrical fitting 74 to horizontal plate 82 , tower cylindrical fitting 74 is essentially immovable respecting vertically oriented conduit 12 .
  • Tower cylindrical fitting 74 has an open bottom into which a dust filter 76 fits as illustrated in FIGS. 8 and 9 .
  • Filter 76 catches dust and fines that are within the vacuum stream drawn upwardly within tower 12 by vacuum pump 20 and collects the dust and fines as the vacuum is drawn upwardly through dust filter 76 and around a blowback unit 78 , as illustrated in FIG. 9 and into vacuum pump 20 . From there, by action of pump 20 , the drawn vacuum is exhausted from exhaust port 92 as air.
  • the vacuum “draw”, as that term is used herein, refers to air drawn by vacuum pump 20 under sufficient level of vacuum to carry granular resin material from a storage bin (not shown) through a conduit (not shown) to inlet end 26 of inlet tube portion 24 of tube 25 and into receiver 14 .
  • the vacuum draw is sufficient to maintain dump flap 56 closed against the weight of resin material within receiver 14 until such time as air cylinder 30 is actuated to push plate 38 against tubular fitting 58 to close tubular fitting 58 , thereby preventing vacuum draw from vertically oriented conduit 12 reaching receiver 14 .
  • valve plate 38 has closed against tubular fitting 58 to close the opening to tubular fitting 58 , vacuum no longer exists within receiver 14 and any resin material therein flows downwardly.
  • the weight of any resin material in receiver 14 overcomes any force applied by dump flap 56 , opening dump flap 56 with the resin material flowing downwardly into hopper 16 immediately below receiver 14 .
  • a hinge 84 has one portion 92 secured to the side of tower cylindrical fitting 74 as illustrated in FIGS. 10 and 11 .
  • Vacuum pump 20 is mounted on a plate 72 and secured thereto via nut and bolt combinations 96 illustrated in FIG. 10 .
  • Plate 72 has an aperture 100 at the center thereof which is positioned to align with the suction intake of vacuum pump 20 when vacuum pump 20 is mounted on plate 72 .
  • blowback unit 78 Also secured to plate 72 on the underside thereof but spaced therefrom is a blowback unit 78 of the type disclosed in the U.S. Pat. Nos. 8,070,844; and 9,387,996.
  • blowback unit 78 When plate 72 is in the horizontal position, lying across the top of tower cylindrical fitting 74 , blow-back unit 78 is spaced close to but away from dust filter 76 .
  • blowback unit 78 Upon actuation of blowback unit 78 , when vacuum pump 20 has been shut down, blowback unit 78 emits a powerful downwardly directed blast of air which knocks the collected dust and fines out of filter 76 , whereupon the dust and fines fall downwardly through vertically oriented conduit 12 , as illustrated in FIG. 8 .
  • vacuum pump 20 and blow back unit 78 are mutually supported by and connected to mounting plate 72 .
  • vacuum pump 20 is secured to mounting plate 72 by nut-bolt combinations, as is blow back unit 72 .
  • vacuum pump 20 is drawn upwardly through vertically oriented conduit 12 and the air, as vacuum, passes around the lateral surfaces of blow back unit 78 , through aperture 100 , and into the intake of vacuum pump 20 .
  • the intake is aligned with aperture 100 in vacuum pump and blow-back support mounting plate 72 in FIG. 10 .
  • a cleanout window having a cover 86 is preferably provided at the bottom of vertically oriented conduit 12 .
  • Cover 86 is connected by a cleanout window hinge 90 to the side of one of the two tower risers 42 forming vertically oriented conduit 12 .
  • a cleanout window latch 88 retains cleanout window cover 86 in place until there is a need to open the cleanout window to remove dust that has collected at the bottom of vertically oriented conduit 12 .
  • a hopper support assembly 102 is illustrated providing support for one of the hoppers 16 ; one such support assembly is provided for each hopper 16 .
  • Each hopper 16 has a feeder 18 associated therewith, located below the associated hopper 16 as illustrated in FIGS. 1, 3 and 9 .
  • Each hopper support assembly 102 includes a feeder 18 with feeder 18 including a feed tube 104 desirably having an auger feed or screw 106 located therewithin as illustrated in FIG. 9 .
  • Each auger or feed screw 106 of a feeder 18 has a motor 108 , mounted on the outboard end of associated feeder tube 104 to drive the auger or feed screw 106 .
  • Motors 108 are illustrated in FIG. 9 for two of the hopper support assemblies 102 that are visible in that view. In FIG. 9 three augers or feed screws 106 associated with feeder assemblies 105 are illustrated.
  • the auger or feed screw 106 for the third feeder assembly of which only the end of feed screw 106 can be seen in FIG. 9 due to the orientation of the apparatus and the position at which the sectional view is taken, has an auger or feed screw denoted 106 ′ in FIG. 9 .
  • each hopper support assembly 102 includes a number, preferably four, of hopper support brackets 110 .
  • Each hopper support bracket 110 has an upstanding portion 112 and a horizontal plate-like portion 114 .
  • the plate-like portions 114 of hopper support brackets 110 stop short of the downward projection of the outlet of a hopper 16 , thereby providing an aperture for downward flow out of the hopper 16 of granular resin material to a feeder 18 below.
  • Plate-like portion 114 of bracket 110 rests on a sandwich-like assembly of three spacer plates numbered 120 , 122 and 124 respectively, as shown in FIG. 12 .
  • An upper one of the spacer plates is designated 120
  • a central one of the spacer plates is designated 122
  • a lower one of the spacer plates is designated 124 .
  • the sandwich-like assembly of spacer plates 120 , 122 , 124 is retained in place on a table-like member 126 by channel members 128 which bear upon the sandwich of spacer plates 120 , 122 , 124 as a result of force applied by nut-bolt combinations 130 connecting channel member 128 and table-like member 126 .
  • a microprocessor 200 Operation of the gravimetric blender 10 according to the invention is controlled desirably by a microprocessor 200 .
  • the microprocessor communicates with air cylinders 30 and vacuum pump 20 of gravimetric blender 10 wirelessly. Internet communication, Ethernet, Blue Tooth protocol communication and the like are all desirable and acceptable.
  • microprocessor 200 may be hard wired to gravimetric blender 10 , if needed.
  • microprocessor 200 receives a signal from a load cell 132 , converts that signal to a sensed weight and compares that weight to the desired weight of the hopper. If microprocessor 200 decides that additional granular resin material or other resin material is required in a given hopper 16 , microprocessor 200 actuates vacuum pump 20 , followed by actuation of air cylinder 30 if needed, according to the default position chosen for air cylinder 30 and plate 38 .
  • the default setting or position for air cylinder 30 may be with plate 38 positioned against tubular fitting 58 , thereby precluding the draw of vacuum within receiver 14 by vacuum pump 20 .
  • the default, or rest, or unactuated position of air cylinder 30 may be with plate 38 removed from contact with tubular fitting 58 , as illustrated on the left side of FIG. 9 . With plate 38 removed from tubular fitting 58 , vacuum drawn by vacuum pump 20 draws the resin material/vacuum stream into receiver 14 via tube 24 .
  • the granular resin strikes plug 28 , and specifically strikes the deflection surface 54 of plug 28 , causing the granular resin material to lose kinetic energy and fall to the bottom of receiver 14 as depicted in FIG. 8 .
  • An optional resin screen may be provided, as depicted in FIG. 8 , to preclude any granular resin material from being carried by the vacuum stream out of tube 25 , through conduit 12 and on to vacuum pump 20 , where damage would result.
  • the vacuum which is actually a stream of very high velocity air, passes around air cylinder 30 and exits receiver tube 25 through tubular fitting 58 , whereupon the air/vacuum is drawn upwardly by vacuum pump 20 through the interior of vertically-oriented conduit 12 , through dust filter 76 , around the periphery of blowback unit 78 , and out to the atmosphere via exhaust port 92 .
  • microprocessor 200 When microprocessor 200 receives a signal from a load cell 132 indicating that a hopper 16 with which a particular load cell 132 is associated has a sufficient material therein, microprocessor 200 acts (to energize or de-energize air cylinder 30 , according to which position of plate 38 has been selected as the default position) so that vacuum is no longer drawn through receiver 14 with which the particular hopper 16 and load cell 132 are associated. No more vacuum is drawn until a load cell 132 associated with a hopper 16 signals that the weight of material within that particular hopper 16 has dropped to such a level that additional material is required in hopper 16 .
  • microprocessor 200 Upon receipt of such a signal, microprocessor 200 actuates or de-actuates air cylinder 30 (according to the default position selected for air cylinder 30 and hence plate 38 with respect to tubular fitting 58 ), in order that vacuum may be drawn and additional material drawn into receiver 14 via resin material/vacuum stream entering receiver 14 via inlet tube portion 24 .
  • Microprocessor 200 permits vacuum to continue to be drawn by maintaining plate 38 in a position removed from tubular fitting 58 until such time as the microprocessor 200 receives a signal from the relevant load cell 132 , indicating that the weight of material in the relevant hopper 16 has reached a satisfactory level, whereupon air cylinder 30 urges plate 38 against fitting 58 , thereby halting draw of vacuum through the relevant receiver.
  • table-like member 126 includes a pair of elongated, hollow, rectangular cross-sectional members 136 which extend longitudinally as respecting feeder 18 associated with hopper 16 , under which table-like member 126 is positioned.
  • a bottom portion 138 of each rectangular member 136 connects to the upper portion of a respective load cell 126 by screws as illustrated in FIG. 12 .
  • Table-like member 126 is preferably constructed of sheet metal with rectangular members 136 formed as a part thereof.
  • Table-like member 126 includes an aperture therethrough which receives a conduit 140 through which resin from hopper 16 may flow downwardly into an aperture in feed tube 104 of feeder 18 .
  • the aperture in feed tube 104 is surrounded by a tubular transition member 141 shown in FIG. 9 .
  • Table-like member 126 bears the weight of hopper 16 , the hopper support brackets 110 , and the sandwich-like assembly of spacer plates 120 , 122 , 124 .
  • Nut and bolt combinations 130 fitting into channel members 128 secure channel members 128 to table-like member 126 . Additionally, nut-bolt combinations 134 secure together the sandwich assembly consisting of upper spacer plate 120 , middle spacer plate 122 , and lower spacer plate 124 ; these nut and bolt combinations 134 also secure the spacer plates to table-like member 126 , as shown in FIG. 13 .
  • load cell 132 is positioned to be stressed by downward force applied by table-like member 126 , with such downward force being applied to the top of load cell 132 , as a result of resin material being in hopper 18 .
  • the bottom portion of load cell 132 is secured to a horizontal portion of a frame member 142 , which is a part of feeder 18 .
  • Load cells 132 are retained in place by upper screws 144 securing the upper portion of load cell 132 to bottom portion 138 of rectangular member 136 which is a portion of table-like member 126 as illustrated in FIGS. 12 and 13 .
  • the lower portion of load cell 132 is secured to frame member 142 by lower screws 146 as illustrated in FIG. 12 .
  • Upper screws 144 and lower screws 146 are at opposite corners of load cell 132 , and are vertically separated as shown, to provide accurate voltage readings from load cell 132 .
  • a voltage sensor 148 depicted in FIG. 12 , senses the voltage produced by load cell 132 and transmits a signal proportional to that voltage to microprocessor 200 for processing to determine the weight and weight change of any material within hopper 16 .
  • frame member 142 together with table-like member 126 provide an effective housing for feed tube 104 containing feed screw 106 of feeder 18 .
  • a lateral side portion 150 of frame member 142 is so numbered and provides closure about feed tube 104 containing feed screw 106 .
  • a u-shaped portion of frame member 142 provides a bottom support for feed tube 104 within which feed screw 106 rotates as feed screw 106 advances granular resin material or other material received from hopper 16 towards a tower bin assembly 40 located at the bottom of vertically oriented conduit 12 where feed screws 106 of feeders 18 converge, as illustrated in FIGS. 3, 7 and 9 .
  • tube 24 has sometimes been referred to as an “inlet tube” portion of receiver 14 and as having an inlet end 26 .
  • inlet tube portion 26 extends only somewhat into receiver 14 . While inlet tube segments are shown in the drawings and numbered as 26 , it is to be understood that the entire upper portion of the structure defining a part of receiver 14 is tubular in nature; this tubular structure is numbered 25 in the drawings.
  • This “tube” 25 of which inlet tube portion 26 is a part, extends completely through receiver 14 and terminates at juncture with vertically oriented conduit 12 .
  • Tubular fitting 58 forms a part of tube 25 and the juncture of tubular fitting 58 with annular flange 60 , where annular flange 60 is within vertically oriented conduit 12 as illustrated in FIG. 9 , defines the outlet end of tube 25 .
  • receiver 14 has but a single tube 25 passing through it with the tube opening or inlet end being defined by inlet end 26 of inlet tube portion 24 and the outlet of tube 25 being defined by the juncture of annular flange 60 of tubular fitting 58 with vertically oriented conduit 12 .
  • plug-in type connection between tube 25 and vertically oriented conduit 12 whereby a receiver 14 requiring a maintenance or replacement may be easily detached from vertically oriented conduit 12 .
  • Such plug-in connection can desirably be effectuated by a pair of concentric sleeve like members, one affixed to vertically oriented conduit 12 and the other defining an end of tube 25 , with an O-ring or other sealing means between the two concentric tubular members.
  • Other means of attachment such as threaded fittings, are also within the scope of the invention for connecting receiver 14 to vertically oriented conduit 12 in a matter that receiver 14 is vertically supported by the connection with vertically oriented conduit 12 .
  • While the invention is most desirably implemented using the load cell/vacuum driven approach to opening and closing receivers 14 as disclosed herein, it is within the scope of the invention to position level sensors 160 within both hoppers 16 and receivers 14 , as shown schematically, on the right half, unsectioned portion of FIG. 7 , and to provide data from those level sensors to microprocessor 200 , thereby to control the operating characteristics of the vacuum pump and the operation of air cylinders 30 within tubes 25 in receivers 14 .
  • wireless communication between such level sensors and the microprocessor is desirable; wired communication is also feasible.
  • Tower configuration gravimetric blender 10 may be mounted on a flat stand such as stand 156 illustrated in FIG. 3 or may be mounted directly over the feed throat of a molding machine or an extruder so that the granular resin material and other materials supplied by feeders 18 fall directly into the feed throat of the molding machine or extruder.
  • Granular resin material or other material contained within hoppers 16 is conveyed by feeders 18 to a common point as illustrated in FIG. 9 where the granular resin components and other materials conveyed by feeders 18 fall into a tower bin assembly 40 , which has sloped sides as illustrated in FIGS. 1, 3, 7 and 9 .
  • a proximity switch 152 or sensor senses the presence or absence of material in bin assembly 40 and actuates an alarm in the event bin assembly 40 is empty.
  • a forward facing vertical surface of bin 40 numbered 154 in the drawings has a window therein, not numbered in the drawings, for observation as the components are fed by feeders 18 into bin 40 .
  • receiver 14 /hopper 16 /feeder 18 combinations being operatively connected to vertically oriented conduit 12
  • four or more receiver 14 /hopper 16 /feeder 18 combinations could be connected to vertically oriented conduit 12
  • Use of conduit extender structure to connect receiver 14 to vertically oriented conduit 12 is within the scope of the invention, especially if more than four receiver 14 /hopper 16 /feeder 18 combinations are used.

Abstract

A gravimetric blender includes a plurality of receivers, each receiver having a single tube therewithin extending from a resin material/vacuum drawn stream inlet to a receiver outlet.

Description

    CROSS REFERENCE TO RELATED PATENT APPLICATION
  • This patent application is a 35 USC 121 division of co-pending U.S. patent application Ser. No. 15/293,409, filed 14 Oct. 2016 in the name of Stephen B. Maguire, entitled “Tower Configuration Gravimetric Blender,” published 12 Apr. 2018 as United States patent publication 2018/0099253 A1, now allowed, the priority of which is claimed under 35 USC 120, which in turn is a continuation-in-part of co-pending U.S. design patent application Ser. No. 29/580,163 filed 6 Oct. 2016 in the name of Steven B. Maguire, granted 9 Jan. 2018 as U.S. Pat. No. D807,414, the priority of which is also claimed under 35 USC 120.
  • STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
  • Not applicable
  • INCORPORATION BY REFERENCE
  • The disclosures of U.S. Pat. Nos. 8,070,855 and 9,387,996 are hereby incorporated by reference in their entirety.
  • FIELD OF THE INVENTION/NOMENCLATURE
  • The terms “air/vacuum,” “vacuum/air” and “air/vacuum stream,” and the like are used synonymously and interchangeably herein to denote a moving stream of air, at sub-atmospheric pressure, drawn by a vacuum pump. Such moving “air/vacuum” streams are conventionally used to convey granular plastic resin material in facilities in which the granular plastic resin is molded or extruded into finished or semi-finished plastic parts.
  • Similarly, the term “resin/vacuum stream” and variations thereof such as “granular resin material/vacuum stream” are used to denote such a high speed stream of air or “vacuum” carrying granules of resin material. Sometimes herein the resin is said to be “entrained” in the moving air/vacuum stream.
  • As used herein, the term “process machine” denotes collectively compression molding machines, injection molding machines and Extruders.
  • BACKGROUND OF THE INVENTION—DESCRIPTION OF THE PRIOR ART
  • “Receiver” is a term widely used in the plastics industry to denote devices that temporarily hold granular plastic resin material before the granular plastic resin material is loaded into a hopper for subsequent processing by a compression or injection molding press or an extruder.
  • Receivers typically include a vacuum chamber that effectively pulls granular plastic resin material into the receiver due to vacuum existing within the vacuum chamber. A vacuum pump is directly or indirectly connected to the receiver to create the vacuum required to pull granular plastic resin material into the receiver. This facilitates moving the granular plastic resin material from a typically remote location to the receiver, which typically feeds a hopper. The receiver, and the vacuum pump are typically part of a larger resin conveying system that conveys the granular plastic resin from a supply to the receiver.
  • Receivers may be located over surge bins or over other temporary storage units in addition to hoppers.
  • Receivers typically load in cycles. Specifically, the receiver loads with granular plastic resin material and then discharges the granular plastic resin material in one operating cycle. Accordingly, a receiver requires a collection bin or surge hopper below the receiver to collect the falling granular plastic resin material to be fed to the process machine.
  • Typically, the vacuum source is remote, namely it is not integrated into the receiver itself. The receiver, in its most simple, elementary form, is a simple chamber that has a vacuum line connected to it to pull air from the chamber to create vacuum inside the chamber. The vacuum then draws granular plastic resin material into the chamber portion of the receiver. The receiver accordingly has a material line connected to it for granular plastic resin material to be pulled by the vacuum into a storage chamber portion of the receiver. Since the receiver has a storage portion with a relatively large volume and a large cross-sectional area relative to the conduit through which the air/vacuum and granular resin material mixture travels, when the granular resin material/vacuum stream mixture reaches the receiver interior, speed of the moving air/vacuum stream drops. The kinetic energy of the stream is no longer sufficient to carry the granular resin, so the resin falls to the bottom of the receiver.
  • SUMMARY OF THE INVENTION
  • This invention provides a gravimetric blender of a different design, sometimes referred to herein as a “tower,” because the gravimetric blender of this invention has a distinctive central “tower-like” structure supporting a vacuum power unit, which will usually be a vacuum pump. The gravimetric blender accommodates up to four feeders, which may be gravimetric feeders, auger feeders, or some other type of feeder. All of the feeders may run simultaneously, or individually intermittently, with each feeder delivering material at a controlled rate to provide the correct blend to be provided as output by the gravimetric blender.
  • The hoppers of the gravimetric blender are preferably mounted on load cells so that the rate of loss of weight of material within the hopper can be continuously detected. Using feedback, preferably controlled by a microprocessor, metering rate of material from each hopper can be accurately regulated to provide the correct blend of material output by the gravimetric blender.
  • In the gravimetric blender of the invention, auger feeders are preferably used and are preferably mounted around a common center to meter material to a central point in the support structure for the tower portion of the blender.
  • The gravimetric blender of the invention incorporates an integrated design in which a receiver mounts directly over each hopper, with the receivers and the hoppers being integrated into the overall design. As a part of the integrated design, there is a single power unit providing a vacuum source for all of the receivers. This results in loading the hoppers using a small, “central” system, in which a single power source serves multiple receivers, which in turn feed associated individual hoppers. Having multiple receivers, hoppers, feeders, and a single vacuum power source, all contained in one integrated unit, provides great operating efficiencies and saves floor space, which is often at a premium in a molding or extruding facility. Similarly, the location of the power unit, and the manner in which the power unit connects to the receivers, saves space and facilitates maintenance and/or replacement of a receiver and/or the power unit (which is preferably a vacuum pump) when required.
  • Another feature of the invention is that each receiver has only a single tube passing through it. This single tube serves as the vacuum outlet from the receiver at one end of the tube. At the other end, the tube serves as the resin material/vacuum stream inlet to the receiver.
  • Another feature of the invention is the connection of the receivers to the vacuum source without tubing. The receiver-vacuum source connection vertically supports the receiver without the receiver needing a supporting base.
  • In the gravimetric blender according to the invention, a tall, centrally located tubular tower-like structure rises from the main base to above the receivers. The receivers connect by a structure conduit connection to the tower. The power unit, typically a vacuum pump, is preferably on top of the tower. The tower connects the vacuum pump to the receivers. An air cylinder located inside a single tube within each receiver serves to open or close the vacuum port, which is within the and a part of the conduit connection to the central tower-like structure when a hopper associated with the receiver calls for material, with the receiver being actuated and controlled by a microprocessor.
  • The actuating air cylinder is enclosed within a single tube in each receiver. A steel plug in the center of the tube serves to mount the air cylinder within the tube while also separating the tube ends from one another so that one end of the tube can be devoted to the vacuum connection, which is air/vacuum flow only, while the other end of the tube can serve as the resin material/vacuum stream inlet, into which a mix of high speed vacuum/air and granular resin material flows. The plug desirably has a tapered deflector surface so that granular resin material entering the receiver in the resin material/vacuum stream is deflected downwardly into the receiver interior. The plug is desirably steel with the tapered deflector end surface serving as a wear point, taking the brunt of the resin impact with abrasion resulting, which is a factor in receiver design.
  • Load cells and an associated microprocessor detect when the amount of granular resin material in one or more of the hoppers is excessively low and direct the power unit, typically and preferably a vacuum pump, to turn on so that a receiver associated with the hopper is actuated. The microprocessor and associated controls further provide for the conveying of granular resin material into each receiver to remain in effect for an appropriate time period for that particular receiver-hopper combination. In one aspect of the invention, the time for conveying and loading each receiver-hopper combination may be set by pressing and holding a button during the individual receiver load cycle, with release of the button setting the load time for that particular receiver within the microprocessor memory.
  • The tower design locates a filter blow-off device on top of the tower, just under the vacuum pump. The vacuum pump is mounted on the upper surface of a hinged plate; the filter blow-off device is mounted on the underside of the plate. When the hinged plate is tilted about a hinge to open the top of the tower, the filter blow-off device retracts out of the way and the filter, which is located within the tower below the blow-off device, is visible for inspection and replacement, if necessary.
  • The filter traps any dust in the vacuum air flow. The blow-off device blows the dust off the filter; the dust falls to the bottom of the tower interior. At the tower bottom is a port with a check disk which opens on pressure but closes on vacuum. As dust collects at the bottom of the tower, the weight of the dust opens the check disk and the dust drops into the granular resin material mix below. No collection vessel is required as the dust is consumed by the process machine, together with the granular material provided to the machine.
  • At least one receiver connects to the vertically oriented conduit and preferably is laterally supported thereby. The receiver is preferably positioned vertically below the vacuum pump for vacuum draw by the vacuum pump through the receiver via the conduit, with the receiver having a vacuum outlet to the conduit as a part of the structure supporting connection to the conduit. The receiver preferably has a granular resin material outlet, preferably at the receiver bottom.
  • A flap valve at the receiver bottom preferably closes responsively to vacuum drawn within the receiver and preferably opens responsively to weight of resin material thereon in the absence of vacuum draw within the receiver.
  • A hopper is located preferably below the receiver for receipt of resin material having preferably been temporarily stored in the receiver, with the hopper receiving the resin material preferably upon weight of resin material in the hopper reaching a preselected low value. The load cell senses weight of resin material in the hopper. The microprocessor preferably actuates the air cylinder to move the valve plate into position to open the vacuum outlet from the tube to the vertically oriented conduit upon weight of resin material in the hopper reaching a low level, where granular resin material in the hopper must be replenished. Vacuum drawn within the tube pulls the granular resin material vacuum stream into the receiver, delivering granular resin material to the receiver for temporary storage therein and delivery to the associated hopper below. A feeder located below each hopper serves to convey material received from the hopper to a discharge chamber for combination with material from other hoppers prior to delivery to a process machine.
  • In another one of its aspects, this invention provides a receiver for temporary storage of granular resin material preparatory to delivery to a process machine for molding or extrusion. The receiver preferably includes a receptacle having a resin material/vacuum stream inlet, a vacuum outlet, and a resin material outlet preferably located at the receptacle bottom. The receiver preferably further includes a tube connected to and extending between the resin material/vacuum stream inlet and the vacuum outlet. The tube includes an air cylinder within the tube, a valve in the form of a plate connected to the air cylinder, with the plate being positioned to close the vacuum outlet preferably upon actuation of the air cylinder. The tube further includes a plug for downwardly deflecting resin material carried by the resin material/vacuum drawn stream entering the receptacle via the inlet. The receiver yet further preferably includes a flap valve at the receptacle bottom. The flap valve preferably closes responsively to vacuum drawn within the receptacle, but preferably opens responsively to weight of resin material thereon in the absence of vacuum drawn within the receptacle.
  • The receiver tube further desirably includes a first aperture in the tube wall, with the aperture being located upstream of the vacuum outlet, for vacuum propagation throughout the receptacle upon the air cylinder being de-energized. The receiver tube further desirably includes a screened second aperture facing downwardly in the tube wall, located upstream of the plug, for downward discharge of granular resin material deflected by the plug upon the resin material/vacuum stream impinging the plug.
  • In still another one of its aspects, this invention provides apparatus for delivery of granular material carried by a pressurized air or vacuum powered stream, where the apparatus includes an inlet member having a passageway extending therethrough. The apparatus preferably further includes a central body connected to the inlet member, with the central body having a passageway therethrough communicating with the inlet member passageway, and having a lateral opening formed in the central body passageway. The apparatus yet further includes, in this aspect of the invention, an outlet member, connected to the central body, having a passageway extending therethrough, communicating with the central body passageway remotely from the inlet member passageway. In this aspect of the invention, the apparatus yet further includes an actuator housed within the central body passageway and connected to the central body, the actuator having a closure member that moves upon energization of the actuator to close the outlet member. In this aspect of the invention the apparatus still yet further includes a plug connected to the central body and facing the inlet member for deflecting, towards the lateral opening, the granular material entering the central body as carried by the pressurized air or vacuum stream through the inlet member.
  • Desirably, the inlet member, the central body and the outlet member are all tubular.
  • Further desirably, the closure member includes a plate for moving against the outlet member passageway thereby to close the same.
  • In yet another one of its aspects, this invention provides a method for gravimetrically blending a plurality of granular materials where the method includes providing a vacuum source. The method proceeds with drawing a vacuum stream upwardly through a vertically oriented conduit and optionally positioning a filter in the conduit. The method yet further proceeds by providing a plurality of receivers laterally connected to and supported by the conduit, with interiors of the receivers communicating with the conduit interior via the lateral support connection.
  • The method still yet further proceeds by drawing separate granular material/vacuum streams into each of the receivers through tubes leading into the receivers, where the granular material/vacuum streams are drawn preferably responsively to vacuum drawn by the single vacuum source through the vertically oriented conduit. The tubes connect with the conduit at juncture of the receivers and the vertically oriented conduit, with the vacuum source drawing vacuum in a receiver via a first aperture in the tube. Each receiver has only a single such tube associated with it.
  • The method yet further proceeds by positioning a plug within each tube to downwardly deflect the incoming granular material/vacuum stream drawn by the vacuum source.
  • The method yet further proceeds preferably by halting vacuum draw in a receiver hopper by closing a valve at juncture of the receiver and the conduit, the valve preferably being powered by an air cylinder within the tube, the valve being downstream of the apertures in the tube, relatively closer to the vacuum source.
  • The method yet further proceeds preferably by maintaining a flap valve closed in the bottom of each receiver by a continuing draw of vacuum in the receiver, thereby preventing downward flow of granular material out of the receiver into a hopper below the receiver.
  • The method still further proceeds by sensing material weight in the hopper using a load cell and actuating the air cylinder, preferably using a microprocessor receiving the weight signal from the load cell, to halt vacuum draw within the receiver, thereby permitting weight of material in the receiver to open the flap valve for downward flow of material out of the receiver and into the hopper below.
  • DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a front elevation of a tower configuration gravimetric blender manifesting aspects of the invention.
  • FIG. 2 is a top view of the tower configuration gravimetric blender illustrated in FIG. 1.
  • FIG. 3 is a left front quarter isometric view of the tower configuration gravimetric blender illustrated in FIGS. 1 and 2.
  • FIG. 4 is an isometric view of one of the tower risers from which a vertically oriented conduit portion of the gravimetric blender illustrated in FIGS. 1, 2 and 3 is constructed.
  • FIG. 5 is a left front quarter isometric view of the vacuum motor and tower portion of the tower configuration gravimetric blender illustrated in FIGS. 1, 2 and 3.
  • FIG. 6 is an isometric drawing of a receiver portion only of the tower configuration gravimetric blender illustrated in FIGS. 1 through 4.
  • FIG. 7 is a front elevation similar to FIG. 1 but with only the left side of the tower configuration gravimetric blender shown in vertical section, with the section taken at lines and arrows VII-VII in FIG. 2.
  • FIG. 8 is a broken away schematic diagrammatic view of the upper portion of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3 and 7 with vacuum stream and resin material flows within the blender being depicted.
  • FIG. 9 is a schematic front view, in elevation, of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3, 7 and 8 with portions of the tower configuration gravimetric blender brown away to show internal parts and details.
  • FIG. 10 is an isometric view showing the tilting opening of the top upper section of the tower configuration gravimetric blender according to the invention.
  • FIG. 11 is a broken side sectional view, taken at lines and arrows XI-XI in FIG. 10, of the top portion of the tower configuration gravimetric blender, showing the tilting opening of the top of the tower section.
  • FIG. 12 is a partially broken isometric view taken at lines and arrows XII-XII in FIG. 13, showing a hopper, load cell and load cell supporting structure portion of the tower configuration gravimetric blender illustrated in FIGS. 1 through 3, and 7 through 11.
  • FIG. 13 is a partial sectional view showing details of the hopper support structure, the load cell support structure and one of the material feeders.
  • DETAILED DESCRIPTION OF THE INVENTION
  • Referring to the drawings in general and particularly to FIGS. 1, 2 and 3, a tower configuration gravimetric blender is designated generally 10. Tower configuration gravimetric blender 10 includes a vertically oriented conduit 12 with a plurality of receivers 14, preferably three as shown in FIGS. 1, 2 and 3, connected to and supported by vertically oriented conduit 12. Below each receiver 14 is a hopper 16, positioned to receive granular plastic resin material or other granular material from an associated receiver 14 by downward flow from the associated receiver 14. Positioned below each hopper 16 is a feeder designated generally 18. Feeder 18 laterally conveys granular plastic resin material received vertically from hopper 16 to a tower bin assembly 40 from which the granular resin material is fed, typically by gravity or pneumatically, to a process machine for molding or extrusion. The process machine is not shown in the drawings.
  • A vacuum source, preferably a vacuum pump, is designated generally 20 and sits atop vertically oriented conduit 12 as illustrated in FIGS. 1 and 3. Vacuum pump 20, during operation of the gravimetric blender, draws vacuum in vertically oriented conduit 12 thereby to draw a resin/vacuum stream from a resin supply, not shown in the drawings, into receivers 14 of tower configuration gravimetric blender 10 and thereby deliver granular resin material to hoppers 16 in the manner described below.
  • Receivers 14 are each secured to vertically oriented conduit 12 by receiver support fittings 22 which are preferably generally hollow and cylindrical in shape, as illustrated in FIG. 6. Each receiver 14 includes a single inlet tube portion 24 serving as an inlet to receiver 14 for the resin/vacuum stream. There is one inlet tube portion 24 for each receiver 14.
  • Referring particularly to FIGS. 6, 7, 8 and 9, each inlet tube portion 24 providing a resin/vacuum stream to a receiver 14 has an inlet end 26 at which the resin/vacuum stream enters the respective inlet tube portion 24 and hence the respective receiver 14. The inflow of the resin/vacuum stream is depicted schematically in FIG. 8. Upon the resin/vacuum stream entering receiver 14 via inlet tube portion 24, the resin/vacuum stream encounters a plug 28 having a deflection surface 54 oriented at approximately 45 degrees with respect to the axis of inlet tube portion 24 and facing inlet end 26 of inlet tube portion 24. Plug 28 is preferably solid and is most preferably steel to be highly wear-resistant with respect to the resin/vacuum stream which impinges plug 28, particularly impinging the angled preferably planar deflection surface 54. As the resin/vacuum stream impinges deflection surface 54, the granules of resin material lose kinetic energy due to collision with deflection surface 54 and fall downwardly, due to their weight, into the lower portion of receiver 14.
  • Located within and fixed to each tube 25 in a receiver 14 is an air cylinder 30 which is desirably also fixed by a pin or other connection to an associated plug 28. At the bottom of each receiver 14 is a resin material outlet 32 via which resin material collected within receiver 14 may empty out of receiver 14, flowing downwardly into hopper 16 located directly below receiver 14. Such flow of material is depicted schematically in FIG. 8 in the left hand receiver 14. A dump flap 56 is connected to each receiver 14 and is located at the receiver bottom outlet 32, covering and closing resin material outlet 32 when vacuum is drawn within receiver 14. In response to such vacuum draw within receiver 14, dump flap 56 closes resin material outlet 32. The vacuum is sufficient to retain dump flap 56 in place thereby precluding any downward flow of resin material out of receiver 14 so long as vacuum is drawn within receiver 14.
  • The end of each tube 25 opposite from inlet end 26 defines an air/vacuum passageway or outlet 34 from tube 25 into vertically oriented conduit 12.
  • Air cylinder 30 includes a shaft 36. When air cylinder 30 is actuated, shaft 36 extends outwardly from cylinder 30 thereby forcing a plate 38, which is fixed to the end of shaft 36, against the outlet end 34 of tube 25, thereby closing tube 25 and halting draw of vacuum within receiver 14.
  • Connected to each receiver 14 close to the lower portion thereof is a cone, sometimes referred to as a cone cover 52. Cone cover 52 precludes any upward escape of resin material from hopper 16, as resin material flows downwardly into hopper 16 from receiver 14. (If hopper 16 is reasonably full, the granular material tends to bounce upwardly or diagonally upon falling downwardly out of receiver 14 and striking granular material already in hopper 16.) Additionally, cone cover 52 limits spread of dust throughout the processing facility.
  • Referring to FIGS. 4 and 5, vertically oriented conduit 12, sometimes referred to herein as the “tower,” is preferably fabricated from two risers 42, one of which is illustrated in FIG. 4. Risers 42 are preferably secured together by bolts, one of which is indicated 64 in FIG. 5 showing the “Tower.”
  • As best illustrated in FIGS. 3 and 6, each receiver 14 includes a receptacle portion 48 for receiving and holding the granular resin material conveyed into receiver 14. Each receiver 14 also includes a lid portion 50 covering the upper opening of receptacle 48, as illustrated in FIG. 6. Manually actuable lever-type fittings 66 secure lid 50 to receptacle 48 in an airtight manner to facilitate draw of vacuum within receiver 14. As shown in the drawings, receptacle portion 48 is of generally conical configuration at the lower portion thereof with the conical portion denoted 68. Receiver 14 further has an upper cylindrical portion 70 to which lid 50 fits and is held in place by fittings 66.
  • Inlet tube portion 24 enters receiver 14 laterally through cylindrical portion 70 of receiver 14 as illustrated in FIG. 6. Suitable airtight cylindrical fittings 94 are secured to cylindrical portion 70 of receiver 14 and are provided where inlet tube portion 24 enters receiver 14 to provide a tight seal, to facilitate the draw of vacuum and thereby entry of the granular resin material/vacuum stream into the interior of receiver 14.
  • Secured to the upper end of vertically oriented conduit 12 or “the Tower” is a tower cylindrical fitting designated generally 74 and illustrated in FIGS. 7, 8, 9, 10 and 11. Tower cylindrical fitting 74, sometimes referred to as the tower vacuum base component, is desirably secured to horizontal flanges 80 preferably by screws or nuts and bolts as shown in FIGS. 8 and 9. Each horizontal flange 80 has two parts, designated 202 and 204 in FIG. 4, formed on each of the two risers 42 that are bolted together to form vertically oriented conduit 12, namely “the Tower”.
  • On the top extremity of each of the two tower risers 42 that form vertically oriented conduit 12 are the pair of horizontal flanges 80 that together form a larger horizontal plate 82; the two parts 202, 204 of horizontal flanges 80 are coplanar. The two horizontal flanges 80 contact one another, as risers 42 are bolted or screwed together, to form a horizontal plate 82, which effectively forms a flat, planar mounting surface for a tower cylindrical fitting 74. Nut and bolt combinations that retain tower cylindrical fitting 74 on horizontal plate 82 are shown but not numbered in FIGS. 8 and 9. When the nuts and bolts have secured tower cylindrical fitting 74 to horizontal plate 82, tower cylindrical fitting 74 is essentially immovable respecting vertically oriented conduit 12.
  • Tower cylindrical fitting 74 has an open bottom into which a dust filter 76 fits as illustrated in FIGS. 8 and 9. Filter 76 catches dust and fines that are within the vacuum stream drawn upwardly within tower 12 by vacuum pump 20 and collects the dust and fines as the vacuum is drawn upwardly through dust filter 76 and around a blowback unit 78, as illustrated in FIG. 9 and into vacuum pump 20. From there, by action of pump 20, the drawn vacuum is exhausted from exhaust port 92 as air.
  • The vacuum “draw”, as that term is used herein, refers to air drawn by vacuum pump 20 under sufficient level of vacuum to carry granular resin material from a storage bin (not shown) through a conduit (not shown) to inlet end 26 of inlet tube portion 24 of tube 25 and into receiver 14. The vacuum draw is sufficient to maintain dump flap 56 closed against the weight of resin material within receiver 14 until such time as air cylinder 30 is actuated to push plate 38 against tubular fitting 58 to close tubular fitting 58, thereby preventing vacuum draw from vertically oriented conduit 12 reaching receiver 14. Once valve plate 38 has closed against tubular fitting 58 to close the opening to tubular fitting 58, vacuum no longer exists within receiver 14 and any resin material therein flows downwardly. The weight of any resin material in receiver 14 overcomes any force applied by dump flap 56, opening dump flap 56 with the resin material flowing downwardly into hopper 16 immediately below receiver 14.
  • A hinge 84 has one portion 92 secured to the side of tower cylindrical fitting 74 as illustrated in FIGS. 10 and 11. Vacuum pump 20 is mounted on a plate 72 and secured thereto via nut and bolt combinations 96 illustrated in FIG. 10. Plate 72 has an aperture 100 at the center thereof which is positioned to align with the suction intake of vacuum pump 20 when vacuum pump 20 is mounted on plate 72.
  • Also secured to plate 72 on the underside thereof but spaced therefrom is a blowback unit 78 of the type disclosed in the U.S. Pat. Nos. 8,070,844; and 9,387,996. When plate 72 is in the horizontal position, lying across the top of tower cylindrical fitting 74, blow-back unit 78 is spaced close to but away from dust filter 76. Upon actuation of blowback unit 78, when vacuum pump 20 has been shut down, blowback unit 78 emits a powerful downwardly directed blast of air which knocks the collected dust and fines out of filter 76, whereupon the dust and fines fall downwardly through vertically oriented conduit 12, as illustrated in FIG. 8.
  • Referring primarily to FIGS. 10 and 11, vacuum pump 20 and blow back unit 78 are mutually supported by and connected to mounting plate 72. As illustrated in FIG. 10, vacuum pump 20 is secured to mounting plate 72 by nut-bolt combinations, as is blow back unit 72. When in place on top of tower configuration gravimetric blender 10 with plate 72 in facing contact with annular surface 98 of tower cylindrical fitting 74 and vacuum pump 20 is actuated, vacuum is drawn upwardly through vertically oriented conduit 12 and the air, as vacuum, passes around the lateral surfaces of blow back unit 78, through aperture 100, and into the intake of vacuum pump 20. The intake is aligned with aperture 100 in vacuum pump and blow-back support mounting plate 72 in FIG. 10.
  • Referring to FIG. 5, a cleanout window having a cover 86 is preferably provided at the bottom of vertically oriented conduit 12. Cover 86 is connected by a cleanout window hinge 90 to the side of one of the two tower risers 42 forming vertically oriented conduit 12. A cleanout window latch 88 retains cleanout window cover 86 in place until there is a need to open the cleanout window to remove dust that has collected at the bottom of vertically oriented conduit 12.
  • Referring to FIGS. 9, 12 and 13, a hopper support assembly 102 is illustrated providing support for one of the hoppers 16; one such support assembly is provided for each hopper 16. Each hopper 16 has a feeder 18 associated therewith, located below the associated hopper 16 as illustrated in FIGS. 1, 3 and 9.
  • Each hopper support assembly 102 includes a feeder 18 with feeder 18 including a feed tube 104 desirably having an auger feed or screw 106 located therewithin as illustrated in FIG. 9. Each auger or feed screw 106 of a feeder 18 has a motor 108, mounted on the outboard end of associated feeder tube 104 to drive the auger or feed screw 106. Motors 108 are illustrated in FIG. 9 for two of the hopper support assemblies 102 that are visible in that view. In FIG. 9 three augers or feed screws 106 associated with feeder assemblies 105 are illustrated. The auger or feed screw 106 for the third feeder assembly, of which only the end of feed screw 106 can be seen in FIG. 9 due to the orientation of the apparatus and the position at which the sectional view is taken, has an auger or feed screw denoted 106′ in FIG. 9.
  • As shown in FIG. 12, each hopper support assembly 102 includes a number, preferably four, of hopper support brackets 110. Each hopper support bracket 110 has an upstanding portion 112 and a horizontal plate-like portion 114. The plate-like portions 114 of hopper support brackets 110 stop short of the downward projection of the outlet of a hopper 16, thereby providing an aperture for downward flow out of the hopper 16 of granular resin material to a feeder 18 below.
  • Plate-like portion 114 of bracket 110 rests on a sandwich-like assembly of three spacer plates numbered 120, 122 and 124 respectively, as shown in FIG. 12. An upper one of the spacer plates is designated 120, a central one of the spacer plates is designated 122 and a lower one of the spacer plates is designated 124. As illustrated in FIGS. 12 and 13, the sandwich-like assembly of spacer plates 120, 122, 124 is retained in place on a table-like member 126 by channel members 128 which bear upon the sandwich of spacer plates 120, 122, 124 as a result of force applied by nut-bolt combinations 130 connecting channel member 128 and table-like member 126.
  • Operation of the gravimetric blender 10 according to the invention is controlled desirably by a microprocessor 200. Most desirably, the microprocessor communicates with air cylinders 30 and vacuum pump 20 of gravimetric blender 10 wirelessly. Internet communication, Ethernet, Blue Tooth protocol communication and the like are all desirable and acceptable. Also, microprocessor 200 may be hard wired to gravimetric blender 10, if needed.
  • During operation of gravimetric blender 10, when a hopper 16 needs material, this is indicated by the weight of hopper 16 as sensed by a load cell 132. Microprocessor 200, receiving a signal from a load cell 132, converts that signal to a sensed weight and compares that weight to the desired weight of the hopper. If microprocessor 200 decides that additional granular resin material or other resin material is required in a given hopper 16, microprocessor 200 actuates vacuum pump 20, followed by actuation of air cylinder 30 if needed, according to the default position chosen for air cylinder 30 and plate 38. (The default setting or position for air cylinder 30 may be with plate 38 positioned against tubular fitting 58, thereby precluding the draw of vacuum within receiver 14 by vacuum pump 20. Alternatively and preferably, the default, or rest, or unactuated position of air cylinder 30 may be with plate 38 removed from contact with tubular fitting 58, as illustrated on the left side of FIG. 9. With plate 38 removed from tubular fitting 58, vacuum drawn by vacuum pump 20 draws the resin material/vacuum stream into receiver 14 via tube 24.)
  • When vacuum is drawn and the granular resin/vacuum stream enters receiver 14 via tube 24, the granular resin strikes plug 28, and specifically strikes the deflection surface 54 of plug 28, causing the granular resin material to lose kinetic energy and fall to the bottom of receiver 14 as depicted in FIG. 8. An optional resin screen may be provided, as depicted in FIG. 8, to preclude any granular resin material from being carried by the vacuum stream out of tube 25, through conduit 12 and on to vacuum pump 20, where damage would result. The vacuum, which is actually a stream of very high velocity air, passes around air cylinder 30 and exits receiver tube 25 through tubular fitting 58, whereupon the air/vacuum is drawn upwardly by vacuum pump 20 through the interior of vertically-oriented conduit 12, through dust filter 76, around the periphery of blowback unit 78, and out to the atmosphere via exhaust port 92.
  • When microprocessor 200 receives a signal from a load cell 132 indicating that a hopper 16 with which a particular load cell 132 is associated has a sufficient material therein, microprocessor 200 acts (to energize or de-energize air cylinder 30, according to which position of plate 38 has been selected as the default position) so that vacuum is no longer drawn through receiver 14 with which the particular hopper 16 and load cell 132 are associated. No more vacuum is drawn until a load cell 132 associated with a hopper 16 signals that the weight of material within that particular hopper 16 has dropped to such a level that additional material is required in hopper 16. Upon receipt of such a signal, microprocessor 200 actuates or de-actuates air cylinder 30 (according to the default position selected for air cylinder 30 and hence plate 38 with respect to tubular fitting 58), in order that vacuum may be drawn and additional material drawn into receiver 14 via resin material/vacuum stream entering receiver 14 via inlet tube portion 24. Microprocessor 200 permits vacuum to continue to be drawn by maintaining plate 38 in a position removed from tubular fitting 58 until such time as the microprocessor 200 receives a signal from the relevant load cell 132, indicating that the weight of material in the relevant hopper 16 has reached a satisfactory level, whereupon air cylinder 30 urges plate 38 against fitting 58, thereby halting draw of vacuum through the relevant receiver.
  • Referring principally to FIG. 13, table-like member 126 includes a pair of elongated, hollow, rectangular cross-sectional members 136 which extend longitudinally as respecting feeder 18 associated with hopper 16, under which table-like member 126 is positioned. A bottom portion 138 of each rectangular member 136 connects to the upper portion of a respective load cell 126 by screws as illustrated in FIG. 12. Table-like member 126 is preferably constructed of sheet metal with rectangular members 136 formed as a part thereof.
  • Table-like member 126 includes an aperture therethrough which receives a conduit 140 through which resin from hopper 16 may flow downwardly into an aperture in feed tube 104 of feeder 18. The aperture in feed tube 104 is surrounded by a tubular transition member 141 shown in FIG. 9. Table-like member 126 bears the weight of hopper 16, the hopper support brackets 110, and the sandwich-like assembly of spacer plates 120, 122, 124.
  • Nut and bolt combinations 130 fitting into channel members 128 secure channel members 128 to table-like member 126. Additionally, nut-bolt combinations 134 secure together the sandwich assembly consisting of upper spacer plate 120, middle spacer plate 122, and lower spacer plate 124; these nut and bolt combinations 134 also secure the spacer plates to table-like member 126, as shown in FIG. 13.
  • With table-like member 126 bearing the weight of hopper 16, the associated hardware retaining hopper 16 in position, and any resin or other material within hopper 16, accurate weight readings respecting resin material in hopper 16 from an associated load cell 132 are assured. As illustrated in FIGS. 12 and 13, load cell 132 is positioned to be stressed by downward force applied by table-like member 126, with such downward force being applied to the top of load cell 132, as a result of resin material being in hopper 18. The bottom portion of load cell 132 is secured to a horizontal portion of a frame member 142, which is a part of feeder 18.
  • Load cells 132 are retained in place by upper screws 144 securing the upper portion of load cell 132 to bottom portion 138 of rectangular member 136 which is a portion of table-like member 126 as illustrated in FIGS. 12 and 13. The lower portion of load cell 132 is secured to frame member 142 by lower screws 146 as illustrated in FIG. 12. Upper screws 144 and lower screws 146 are at opposite corners of load cell 132, and are vertically separated as shown, to provide accurate voltage readings from load cell 132. A voltage sensor 148, depicted in FIG. 12, senses the voltage produced by load cell 132 and transmits a signal proportional to that voltage to microprocessor 200 for processing to determine the weight and weight change of any material within hopper 16.
  • As illustrated in FIGS. 7 and 13, frame member 142 together with table-like member 126 provide an effective housing for feed tube 104 containing feed screw 106 of feeder 18. In FIG. 7, a lateral side portion 150 of frame member 142 is so numbered and provides closure about feed tube 104 containing feed screw 106.
  • A u-shaped portion of frame member 142 provides a bottom support for feed tube 104 within which feed screw 106 rotates as feed screw 106 advances granular resin material or other material received from hopper 16 towards a tower bin assembly 40 located at the bottom of vertically oriented conduit 12 where feed screws 106 of feeders 18 converge, as illustrated in FIGS. 3, 7 and 9.
  • In this description of the invention, tube 24 has sometimes been referred to as an “inlet tube” portion of receiver 14 and as having an inlet end 26. In the drawings, inlet tube portion 26 extends only somewhat into receiver 14. While inlet tube segments are shown in the drawings and numbered as 26, it is to be understood that the entire upper portion of the structure defining a part of receiver 14 is tubular in nature; this tubular structure is numbered 25 in the drawings. This “tube” 25, of which inlet tube portion 26 is a part, extends completely through receiver 14 and terminates at juncture with vertically oriented conduit 12. Tubular fitting 58 forms a part of tube 25 and the juncture of tubular fitting 58 with annular flange 60, where annular flange 60 is within vertically oriented conduit 12 as illustrated in FIG. 9, defines the outlet end of tube 25. Accordingly, receiver 14 has but a single tube 25 passing through it with the tube opening or inlet end being defined by inlet end 26 of inlet tube portion 24 and the outlet of tube 25 being defined by the juncture of annular flange 60 of tubular fitting 58 with vertically oriented conduit 12.
  • While the construction of the juncture of tube 25 with vertically oriented conduit 12 as illustrated in the drawings is the preferred construction, is further within the scope of the invention to provide a plug-in type connection between tube 25 and vertically oriented conduit 12 whereby a receiver 14 requiring a maintenance or replacement may be easily detached from vertically oriented conduit 12. Such plug-in connection can desirably be effectuated by a pair of concentric sleeve like members, one affixed to vertically oriented conduit 12 and the other defining an end of tube 25, with an O-ring or other sealing means between the two concentric tubular members. Other means of attachment, such as threaded fittings, are also within the scope of the invention for connecting receiver 14 to vertically oriented conduit 12 in a matter that receiver 14 is vertically supported by the connection with vertically oriented conduit 12.
  • While the invention is most desirably implemented using the load cell/vacuum driven approach to opening and closing receivers 14 as disclosed herein, it is within the scope of the invention to position level sensors 160 within both hoppers 16 and receivers 14, as shown schematically, on the right half, unsectioned portion of FIG. 7, and to provide data from those level sensors to microprocessor 200, thereby to control the operating characteristics of the vacuum pump and the operation of air cylinders 30 within tubes 25 in receivers 14. In such implementation of the invention, wireless communication between such level sensors and the microprocessor is desirable; wired communication is also feasible.
  • Tower configuration gravimetric blender 10 may be mounted on a flat stand such as stand 156 illustrated in FIG. 3 or may be mounted directly over the feed throat of a molding machine or an extruder so that the granular resin material and other materials supplied by feeders 18 fall directly into the feed throat of the molding machine or extruder.
  • Granular resin material or other material contained within hoppers 16 is conveyed by feeders 18 to a common point as illustrated in FIG. 9 where the granular resin components and other materials conveyed by feeders 18 fall into a tower bin assembly 40, which has sloped sides as illustrated in FIGS. 1, 3, 7 and 9. A proximity switch 152 or sensor senses the presence or absence of material in bin assembly 40 and actuates an alarm in the event bin assembly 40 is empty. A forward facing vertical surface of bin 40, numbered 154 in the drawings has a window therein, not numbered in the drawings, for observation as the components are fed by feeders 18 into bin 40.
  • Unlike conventional, known gravimetric blenders, there is no mixing or blending of components performed by the tower configuration gravimetric blender of the invention. No mixing is required since the amount of material delivered by each of the feeders 18 is precise, due to the accurate weight measured by load cells 132 and microprocessor 200. To the extent any mixing might be required, the screw of the process machine effectuates such mixing in an efficient manner.
  • While the invention has been described herein with three receiver 14/hopper 16/feeder 18 combinations being operatively connected to vertically oriented conduit 12, four or more receiver 14/hopper 16/feeder 18 combinations could be connected to vertically oriented conduit 12. Use of conduit extender structure to connect receiver 14 to vertically oriented conduit 12 is within the scope of the invention, especially if more than four receiver 14/hopper 16/feeder 18 combinations are used.
  • While the invention and the mode of operation have been described clearly and in more than sufficient detail that one of skill in the art could practice the invention using the teachings of the instant application, and while the claims appended hereto are clear and concise and find full support in the foregoing specification, the invention is not limited to the embodiments described in the foregoing specification or to the literal language of the appended claims. The invention further embraces components, assemblies and methods not disclosed herein but which would perform substantially the same function in substantially the same way to achieve the same result as the apparatus and methods that are the subject of the appended claims.
  • In the claims appended hereto, the term “comprising” is to be interpreted as meaning “including, but not limited to,” while the phrase “consisting of” is to be interpreted as meaning “having only and no more,” and the phrase “consisting essentially of” is to be interpreted to mean the recited elements of the claim and those other items that do not materially affect the basic and novel characteristics of the claimed invention.

Claims (21)

The following is claimed:
1. A gravimetric blender comprising:
a) an upstanding conduit;
b) a vacuum pump having a suction inlet communicating with the interior of the conduit;
c) at least one receiver connected to the conduit and supported thereby, for vacuum draw through the receiver connection and the receiver via the conduit by the pump.
2. The gravimetric blender of claim 1 wherein the receiver further comprises:
a) a hollow body having a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet;
b) a tubular member connecting and extending between the inlet and the vacuum outlet; and
c) an actuator housed within the tubular member and connected thereto
d) a closure member connected to the actuator and moving upon energization of the actuator to close the vacuum outlet.
3. The gravimetric blender of claim 2 further comprising a plug within the tubular member, connected to the actuator and facing the inlet, for deflecting granular resin material entering the body via the inlet as carried by the vacuum stream.
4. The gravimetric blender of claim 2 wherein the closure member is a plate.
5. The gravimetric blender of claim 2 further comprising a valve at the granular resin material outlet, the valve closing upon draw of vacuum within the receiver and opening in response to weight of granular resin material within the receiver upon halting of vacuum draw within the receiver.
6. The gravimetric blender of claim 5 wherein the valve is a flap valve.
7. The gravimetric blender of claim 2 wherein the actuator is an air cylinder.
8. The gravimetric blender of claim 1 wherein the conduit is vertical.
9. The gravimetric blender of claim 8 wherein the receiver is vertically supported by the conduit.
10. A receiver for delivery therefrom of granular resin material carried thereinto by a pressurized air or vacuum powered stream, consisting of:
a) a hollow body having a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet;
b) a tubular member connecting and extending between the inlet and the vacuum outlet; and
c) an actuator housed within the tubular member and connected thereto
d) a closure member connected to the actuator and moving upon energization of the actuator to close the vacuum outlet.
11. A receiver for delivery therefrom of granular resin material carried thereinto by a pressurized air or vacuum powered stream, comprising:
a) a hollow body having a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet;
b) a tubular member connecting and extending between the inlet and the vacuum outlet; and
c) an actuator housed within the tubular member and connected thereto
d) a closure member connected to the actuator and moving upon energization of the actuator to close the vacuum outlet.
12. The receiver of claim 11 further comprising a plug within the tubular member, connected to the actuator and facing the inlet, for deflecting granular resin material entering the body via the inlet as carried by the vacuum stream.
13. The receiver of claim 11 wherein the closure member is a plate.
14. The receiver of claim 11 further comprising a valve at the granular resin material outlet, the valve closing upon draw of vacuum within the receiver and opening in response to weight of granular resin material within the receiver upon halting of vacuum draw within the receiver.
15. The receiver of claim 14 wherein the valve is a flap valve.
16. The receiver of claim 11 wherein the actuator is an air cylinder.
17. In a receiver for delivery therefrom of granular resin material carried thereinto by a pressurized air or vacuum powered stream, having a hollow body with a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet, the improvement comprising:
a) a tubular member connecting and extending between the inlet and the vacuum outlet;
b) an actuator housed within the tubular member and connected thereto; and
c) a closure member connected to the actuator and moving upon energization of the actuator to close the vacuum outlet.
18. In a receiver for delivery therefrom of granular resin material carried thereinto by a pressurized air or vacuum powered stream, having a hollow body with a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet, the improvement comprising a single tubular member connecting and extending between the inlet and the vacuum outlet.
19. In a receiver for delivery therefrom of granular resin material carried thereinto by a pressurized air or vacuum powered stream, having a hollow body with a granular resin material/vacuum stream inlet, a vacuum outlet and a granular resin material outlet, the improvement consisting of a single tubular member connecting and extending between the inlet and the vacuum outlet.
20. The gravimetric blender of claim 1 wherein the vacuum pump is at an upper end of the conduit.
21. The gravimetric blender of claim 2 wherein the conduit is vertical, the vacuum pump connects to the conduit at the top of the conduit, and the receiver is vertically supported by the conduit.
US16/186,858 2016-10-06 2018-11-12 Tower configuration gravimetric blender and receiver for use therewith Abandoned US20190084779A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111136817A (en) * 2020-01-07 2020-05-12 区志棚 System for be used for polyurethane combined material automatic blending
CN112123826A (en) * 2020-09-08 2020-12-25 浙江中天能橡胶股份有限公司 Manufacturing method of high-performance conveying belt

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111220244A (en) * 2012-06-04 2020-06-02 基伊埃工程技术有限公司 Method for processing medicinal powder and feeding module used for method
US10138075B2 (en) 2016-10-06 2018-11-27 Stephen B. Maguire Tower configuration gravimetric blender
USD817555S1 (en) * 2015-12-09 2018-05-08 Oerlikon Metco (Us) Inc. Hopper
CN108636283A (en) * 2018-04-19 2018-10-12 张建宏 A kind of food production raw material equal proportion injection device
USD882186S1 (en) * 2018-12-18 2020-04-21 Zaxe Technologies Inc. Automatic animal feeder
CN112720894A (en) * 2020-12-11 2021-04-30 唯嘉管业(东海县)有限公司 HDPE (high-density polyethylene) pipe compounding process and equipment
US20230150758A1 (en) * 2021-11-11 2023-05-18 Dimension Product Solutions LP Modular auto-cleaning hopper assembly
CN114602374B (en) * 2022-03-03 2023-04-07 湖南新源发制品股份有限公司 Wig fiber coloring agent production facility

Family Cites Families (250)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US540154A (en) 1895-05-28 Steam-pressure regulator
US753597A (en) 1904-03-01 Charles ernest long
US600233A (en) 1898-03-08 Store-fixture
US937096A (en) 1908-05-29 1909-10-19 Simplex Engineering Co Blow-off valve.
US1489348A (en) 1920-02-21 1924-04-08 Leon N Hampton Fluid-transfer device
US1451759A (en) 1920-12-03 1923-04-17 Krupp Ag Automatic weighing apparatus for loose materials
US1520017A (en) 1924-04-08 1924-12-23 Denton Willmott Henderson Seed dropper
US2188646A (en) 1937-09-29 1940-01-30 Bunch Ray Pump assembly
US2199657A (en) 1937-12-15 1940-05-07 Bunch Ray Dispensing package
US2161190A (en) 1938-01-28 1939-06-06 Wheeling Stamping Co Apparatus for measuring charges of powdered and granular materials
US2434345A (en) * 1944-11-01 1948-01-13 Us Leather Company Conveying mechanism
US2550240A (en) 1945-09-28 1951-04-24 Ervin D Geiger Weighing and dispensing bin
US2587338A (en) 1949-01-01 1952-02-26 Lee George Arthur Automatic machine for measuring granular materials
US2606696A (en) 1949-08-29 1952-08-12 Earl W Miner Dispensing device
US2656828A (en) 1949-10-01 1953-10-27 Outboard Marine & Mfg Co Fuel supplying means using crankcase pressure developed in a twocycle engine for delivering fuel to the carburetor
US2665825A (en) 1950-03-25 1954-01-12 Edward J Poitras Pressure-operable liquid dispensing apparatus
US2701881A (en) 1953-09-28 1955-02-15 Leland T Mcgee Covered swimming pool
US2893602A (en) 1955-09-09 1959-07-07 Barber Greene Co Apparatus for measuring aggregate for mixture with asphalt
US2909315A (en) 1956-10-10 1959-10-20 Thompson Ramo Wooldridge Inc Hydraulically operated gas compressor
FR1167265A (en) 1957-02-27 1958-11-24 Charbonnages De France Device for the discontinuous supply of a fireplace with divided solid fuel
US3138117A (en) 1958-06-30 1964-06-23 Entpr Railway Equipment Co Sliding hopper closure housing outlet assembly
US3115276A (en) 1961-01-23 1963-12-24 Int Minerals & Chem Corp Screw conveyor apparatus
US3111115A (en) 1961-10-13 1963-11-19 Sperry Rand Corp Forage distributing and conveying apparatus
US3228563A (en) 1962-04-03 1966-01-11 Stanley L Rankin Device with positive displacement valve unit
FI41721B (en) 1962-08-16 1969-09-30 Tornborg & Lundberg Ab
DE1982969U (en) 1963-07-20 1968-04-04 Miag Muehlenbau U Ind G M B H CELL OUTLET DEVICE AT SILOS WITH RECTANGULAR CROSS SECTION.
US3252531A (en) 1963-12-02 1966-05-24 Howe Richardson Scale Co Weighing apparatus
US3258296A (en) * 1964-03-20 1966-06-28 Funk Irwin Von Pneumatic material conveyor
US3209898A (en) 1964-07-27 1965-10-05 Avco Corp Self sealing gate and trough construction
GB1145492A (en) 1965-04-01 1969-03-12 Waddington & Duval Ltd Improvements in and relating to taps or pourers for containers
DE1255582B (en) 1965-04-15 1967-11-30 Mahlkuch Greif Werk Ernst System for the central loading of bulk goods from adjoining silo cells
GB1145752A (en) 1965-05-11 1969-03-19 Rawdon Engineering And Tool Co Liquid pumping apparatus
FR1477595A (en) 1966-03-02 1967-04-21 Realisations D Automatismes Et Suction and pressure dosing pump operating by pulses
US3476358A (en) 1966-09-29 1969-11-04 Koehring Co Gate valve
GB1120270A (en) 1967-02-13 1968-07-17 Anglo Amer Corp South Africa A valve for controlling the rate of flow of solids
US3470994A (en) 1967-12-21 1969-10-07 Deere & Co Cover assembly for a clean-out opening in a fertilizer hopper
US3410530A (en) 1967-12-26 1968-11-12 Gilman Brothers Co Dry solids continuous blending and conveying apparatus
US3518033A (en) 1969-08-22 1970-06-30 Robert M Anderson Extracorporeal heart
US3595328A (en) 1969-09-08 1971-07-27 Owens Corning Fiberglass Corp Automatic batch weighing system
DE2034837C3 (en) 1970-07-14 1973-12-06 Bruno Meyer Spezialmaschinen- Und Wiegeapparatebau Gmbh, 5202 Hennef Device for the discontinuous production of mixtures of fine to coarse-grained bulk materials
US3735641A (en) 1970-10-05 1973-05-29 Sherritt Gordon Mines Ltd Diverting and sampling gate
US3814388A (en) 1971-02-16 1974-06-04 Reinhard Colortronic Dyeing process for synthetic materials
US3702140A (en) 1971-02-22 1972-11-07 Avco Corp Mine skip loading apparatus
US4014462A (en) 1971-03-29 1977-03-29 Robertson Joseph D Scrap recovery and feed system
CH543732A (en) 1971-09-15 1973-10-31 Daester Fairtec Ag Device for conveying, gravimetric dosing and mixing of free-flowing material with other free-flowing or liquid or dough-like materials
US3799622A (en) * 1971-12-28 1974-03-26 Universal Dynamics Corp Multi-station loader for particulate material
US3733012A (en) 1972-06-05 1973-05-15 Luco Technic Ag Dispensing device for a bulk material receptacle
US3871629A (en) 1972-07-28 1975-03-18 Iwao Hishida Mouldable synthetic resin colouring material and application apparatus thereof
JPS4939152A (en) 1972-08-15 1974-04-12
US3853190A (en) 1973-05-04 1974-12-10 M Delesdernier Apparatus for weighing draughts of bulk material
SE380445B (en) 1973-11-23 1975-11-10 Bjoerklund K B PROCEDURE FOR INTERMITTENT DOSAGE OF SMALL VOLUMES AND DEVICE FOR PERFORMING THE PROCEDURE
US4103357A (en) 1973-12-05 1978-07-25 Colortronic Reinhard & Co., Kg Process and device for continuous metering and mixing
DE2360644B2 (en) 1973-12-05 1978-01-05 Colortronic Reinhard + Co KG, 6382 Friedrichsdorf; Colortronic Co, Ltd, Tokio DEVICE FOR MIXING METERED QUANTITIES OF A PLASTIC AND AT LEAST ONE ADDITIVE
NL7414152A (en) * 1973-12-08 1975-06-10 Zimmermann Azo Maschf IMPROVEMENT OF A WEIGHING DEVICE FOR A PNEUMATIC TRANSPORT INSTALLATION.
US3967815A (en) 1974-08-27 1976-07-06 Backus James H Dustless mixing apparatus and method for combining materials
NL7413443A (en) 1974-10-11 1976-04-13 Nautamix Patent Ag BARREL EQUIPPED WITH A RECESSED CLOSING COVER.
US3959636A (en) 1975-03-10 1976-05-25 Mangood Corporation Batching system
US3957399A (en) 1975-03-20 1976-05-18 Graco Inc. Diaphragm pump
DE2544716A1 (en) * 1975-10-07 1977-04-21 Zimmermann Azo Maschf SUCTION CONVEYOR SYSTEM
US3988088A (en) 1975-12-04 1976-10-26 United Technologies Corporation Press for particulate material
US4108334A (en) 1975-12-08 1978-08-22 Hydreclaim Corporation Apparatus for feeding scrap and base plastics material to an extruder
US4026442A (en) 1975-12-15 1977-05-31 Orton Horace L Household liquid dispenser
US4037827A (en) 1975-12-15 1977-07-26 F.P.E.C. Corporation Food product mixer with an improved door mechanism
US4087134A (en) * 1976-10-05 1978-05-02 Azo-Maschinenfabrik Adolf Zimmermann Method and apparatus for the pneumatic conveying of milk powder
CA1117622A (en) 1977-08-11 1982-02-02 Douglas A. Wood Particle flow control systems
USD258213S (en) 1977-09-21 1981-02-10 Russell Finex Limited Vibratory straining machine
US4185948A (en) 1977-11-30 1980-01-29 Maguire Stephen B Peristaltic pump construction
US4148100A (en) 1977-12-15 1979-04-03 Hydreclaim Corporation Apparatus and method for mixing fluffy and rigid plastics materials
US4219136A (en) 1978-11-20 1980-08-26 Ostrowski Diane L Pre-measured automatic quantity dispensing apparatus and methods of constructing and utilizing same
US4415297A (en) * 1979-05-14 1983-11-15 Conair, Inc. Vacuum material transporting system
US4341492A (en) * 1980-02-19 1982-07-27 R & M Associates, Inc. Method for pneumatically handling agglomerative materials
CA1100402A (en) 1980-02-21 1981-05-05 Cassius D. Remick Humidifier with flexible removable door
SE422311B (en) 1980-07-10 1982-03-01 Nordstroems Linbanor Ab EMERGENCY LOAD FOR BULK-LOAD LOADS, PREFERREDLY BULK-LOAD VESSELS
DE3028260C1 (en) 1980-07-25 1982-06-24 Colortronic Reinhard & Co Kg, 6382 Friedrichsdorf Device for dosing granular or powdery substances
SE422607B (en) 1980-08-01 1982-03-15 Karl Gunnar Ohlson PROCEDURE AND DEVICE FOR BATTLE PREPARATION OF COATING PASS CONTAINING STONE MATERIAL AND BITUMEN BINDING AGENTS
GB2081687B (en) 1980-08-05 1984-07-04 Mokris Michael Matthew Storage bin activator device and method of restoring bulk material free flow
US4379663A (en) * 1980-09-22 1983-04-12 Mac Equipment, Inc. Vacuum sequencing system with weight controlled material draw cycle
US4339277A (en) 1980-09-22 1982-07-13 Schult Hans E Solid sulfur-extended asphalt composition and method and apparatus therefor
US4364666A (en) 1980-10-03 1982-12-21 Beatrice Foods Co. Machine for mixing and cooling batches of dry powder ingredients and water
US4394941A (en) 1981-08-31 1983-07-26 Thomas L. Shannon, Jr. Fluid dispenser
JPS5847136U (en) 1981-09-21 1983-03-30 株式会社石田衡器製作所 Hopper attachment/detachment device for automatic weighing equipment
DE3146667C2 (en) 1981-11-25 1984-12-06 Werner & Pfleiderer, 7000 Stuttgart Method and device for mixing and metering several mix components
US4454943A (en) 1981-12-07 1984-06-19 Hydreclaim Corporation Auger housing construction
DE3237353A1 (en) 1982-10-08 1984-04-12 Hans Klaus Schneider Device for mixing dental compounds
DE3368321D1 (en) 1982-04-21 1987-01-22 Haigh Chadwick Ltd Cyclically weighing bulk solid material
JPS58208012A (en) * 1982-05-27 1983-12-03 Kureha Chem Ind Co Ltd Feeding device of synthetic resin powder to extrusion molding machine
US4475672A (en) 1982-07-06 1984-10-09 Whitehead Jerald M Hopper discharge device
DE3228161C1 (en) 1982-07-28 1984-01-19 Karl 7298 Loßburg Hehl Feeding device for feeding plastic granulate into an injection molding unit
JPS5974092A (en) 1982-10-05 1984-04-26 大和製衡株式会社 Gate switchgear
JPS5982936A (en) 1982-11-02 1984-05-14 Matsui Seisakusho:Kk Weight measurement type compounding and mixing device for granule
IN160116B (en) 1982-12-11 1987-06-27 Satake Eng Co Ltd
US4473173A (en) 1983-01-10 1984-09-25 Applied Color Systems, Inc. Apparatus and method for low volume dispensing
US4459028A (en) 1983-02-24 1984-07-10 Lee Heydenreich Apparatus for weighing and blending fluent materials
US4505407A (en) 1983-03-07 1985-03-19 Francis Tool Company Volumetric measure for granular material
US4501405A (en) 1983-06-21 1985-02-26 Bunnell Life Systems, Inc. Frictionless valve/pump
US4571416A (en) 1983-10-21 1986-02-18 Bee Chemical Co. Liquid colorant/additive concentrate for plastics
DE3408820A1 (en) 1984-03-10 1985-09-12 Bernhard 6636 Überherrn Ladwein Installation for mixing flowable materials and for filling them into containers
US4525071A (en) 1984-05-31 1985-06-25 Crawford & Russell, Inc. Additive inventory control, batching and delivery system
DE3424752A1 (en) 1984-07-05 1986-01-16 Ladwein, geb. Otto, Rosemarie, 6636 Überherrn PLANT FOR MIXING AND FILLING OF FLOWABLE SUBSTANCES
JPS6144328A (en) 1984-08-08 1986-03-04 Ishida Scales Mfg Co Ltd Hopper opening device of combined measuring apparatus
US4619379A (en) 1984-08-30 1986-10-28 Biehl Roy J Bulk food dispenser
DE3433693A1 (en) 1984-09-13 1986-03-20 Herfeld, Friedrich Walter, Dr., 5982 Neuenrade Mixing device
IT1199500B (en) 1984-10-12 1988-12-30 Corob Srl METHOD FOR VOLUME DOSING OF DYES IN PAINT PRODUCTS AND RELATED MACHINE
DE3541532A1 (en) 1984-11-27 1986-05-28 Basf Ag, 6700 Ludwigshafen Process and device for producing fibre-reinforced thermoplastics
US4586882A (en) 1984-12-06 1986-05-06 Baxter Travenol Laboratories, Inc. Tubing occluder pump
USD294363S (en) 1985-01-24 1988-02-23 Aamberger Kaolinwerke GmbH Hydrocyclone centrifugal separator
US4621990A (en) 1985-03-01 1986-11-11 The Gorman-Rupp Company Diaphragm pump
JPS61216721A (en) 1985-03-20 1986-09-26 Matsui Seisakusho:Kk Method for mixing particulate material
US4657490A (en) 1985-03-27 1987-04-14 Quest Medical, Inc. Infusion pump with disposable cassette
SU1310290A1 (en) 1985-07-23 1987-05-15 Специальное Конструкторско-Технологическое Бюро "Элеватормельмаш" Metering device
US4606710A (en) 1985-10-09 1986-08-19 Maguire Stephen B Peristaltic pump
US5219224A (en) 1986-02-26 1993-06-15 Micro Chemical, Inc. Programmable apparatus and method for delivering microingredient feed additives to animals by weight
US4733971A (en) 1986-02-26 1988-03-29 Micro Chemical, Inc. Programmable weight sensitive microingredient feed additive delivery system and method
USD303672S (en) 1986-02-28 1989-09-26 Stamicarbon B.V. Design for a cyclone separator
SE452303B (en) 1986-03-12 1987-11-23 Consilium Marine Ab EXHAUST DEVICE IN GOODS
KR880701131A (en) 1986-05-23 1988-07-26 가또오 미끼오 Fine powder feed mixer
US4756348A (en) 1986-08-07 1988-07-12 Hydreclaim Corporation Control apparatus for plastic blending machinery
DE3705963C1 (en) 1987-02-25 1988-08-11 Inoex Gmbh Material feed device for an extruder
EP0289048B1 (en) 1987-05-01 1995-01-11 Fuji Photo Film Co., Ltd. Measuring mixer for liquids and powders
US4955550A (en) 1987-11-07 1990-09-11 Toyota Jidosha Kabushiki Kaisha Quantitative feeding apparatus usable for pulverized and/or granular material and batch type multi-colored automatic feeding apparatus
DE3827927A1 (en) 1988-08-17 1990-02-22 Reinhard Colortronic METHOD AND DEVICE FOR GRAVIMETRICALLY DETECTING THE CONSUMPTION OF RAW MATERIAL IN PROCESSING MACHINES
DE8816703U1 (en) 1988-09-01 1990-04-05 Inoex Gmbh Innovationen Und Ausruestungen Fuer Die Extrusionstechnik, 4970 Bad Oeynhausen, De
US4967940A (en) 1989-02-21 1990-11-06 Minnesota Mining And Manufacturing Co. Method and apparatus for precision squeeze tube valving, pumping and dispensing of work fluid(s)
JPH06104189B2 (en) 1989-03-29 1994-12-21 産業機電株式會社 Mixer for raw materials
US4895450A (en) 1989-05-01 1990-01-23 Karl Holik Weighing, measuring, and mixing apparatus for lightweight concrete
DE3923241A1 (en) 1989-07-14 1991-01-24 Reimelt Dietrich Kg Automatic quality control in granules - system tests samples and diverts material outside tolerance to separate containers and mixes it with fresh material
JPH0362828A (en) 1989-07-30 1991-03-18 Victor Co Of Japan Ltd Coloring method for polycarbonate resin molded product for optical member
US5116548A (en) 1989-08-29 1992-05-26 American Bank Note Holographics, Inc. Replicaton of microstructures by casting in controlled areas of a substrate
DE3933471A1 (en) 1989-10-06 1991-04-18 Schenck Ag Carl METHOD AND DEVICE FOR IMPROVING THE DOSING ACCURACY OF A REGULATED DIFFERENTIAL DOSING SCALE
US5243455A (en) 1990-05-11 1993-09-07 The University Of Colorado Foundation, Inc. Chiral smectic liquid crystal polarization interference filters
JP2823093B2 (en) 1990-02-02 1998-11-11 ビューラー・アクチェンゲゼルシャフト・マシイネンファブリーク Equipment for continuous mixing and homogenization
US5527107A (en) 1990-02-02 1996-06-18 Buehler Ag Plant for continuous mixing and homgenization
US5039279A (en) 1990-03-15 1991-08-13 Abbott Laboratories Sensor for detecting fluid flow from a positive displacement pump
DE4008705A1 (en) 1990-03-17 1991-09-19 Varta Batterie DEVICE FOR IMPLEMENTING VISCOSIC ACTIVE INGREDIENTS INTO THE HOUSING OF A GALVANIC ELEMENT
DK164265C (en) 1990-03-28 1992-11-02 Skako As METHOD OF DOSING FIBERS
US5110521A (en) 1990-08-17 1992-05-05 Hydreclaim Corporation Hybrid apparatus and method for blending materials
US5125535A (en) 1990-08-21 1992-06-30 Ohlman Hans Armin Gravimetric metering apparatus for bulk materials
EP0502201B1 (en) 1990-09-17 1996-05-29 Anritsu Corporation Combinational metering machine for simply realizing high precision measuring of a wide range of work including viscous substances
US5074519A (en) 1990-11-09 1991-12-24 Cooper Industries, Inc. Fail-close hydraulically actuated control choke
JPH0694131B2 (en) 1990-11-09 1994-11-24 産業機電株式會社 Mixer for raw materials
JPH04201522A (en) 1990-11-30 1992-07-22 Mitsuhiro Kanao Vacuum drying device
CA2031609C (en) 1990-12-05 1997-10-28 Gregory Daniel William Pelech Valve
US5143166A (en) 1991-02-01 1992-09-01 Hough Richard M Micro weighing system
GB2252798B (en) 1991-02-14 1994-07-27 Danby Medical Ltd Pumping apparatus
DE4110135A1 (en) 1991-03-27 1992-10-01 Windmoeller & Hoelscher METHOD AND DEVICE FOR DETERMINING THE QUANTITY DRAWN BY TIME FROM AN EXTRUDER FROM A TASK CONTAINER
FR2674791B1 (en) 1991-04-02 1994-01-28 Robert Perrin INSTALLATION FOR THE AUTOMATIC FEEDING OF A PROCESSING MACHINE, PARTICULARLY OF PLASTIC MATERIAL, BY A HOMOGENEOUS MIXTURE OF SEVERAL PRODUCTS.
US5096302A (en) 1991-04-24 1992-03-17 Spirex Corporation Plastic feeding device and method
US5172489A (en) 1991-04-30 1992-12-22 Hydreclaim Corporation Plastic resin drying apparatus and method
JPH07112708B2 (en) 1991-05-02 1995-12-06 ワイケイケイ株式会社 Automatic conversion and supply device for colored molding material in injection molding machine
US5148943A (en) 1991-06-17 1992-09-22 Hydreclaim Corporation Method and apparatus for metering and blending different material ingredients
US5265956A (en) 1991-09-30 1993-11-30 Stryker Corporation Bone cement mixing and loading apparatus
US5225210A (en) 1991-10-18 1993-07-06 Sysko Corporation Colored resin molder
US5341961A (en) 1991-12-11 1994-08-30 Hausam Leonard P Coffee dispenser with agitator
US5217108A (en) 1992-01-02 1993-06-08 Grindmaster Corporation Auger portioning device for a coffee bean grinder
US5252008A (en) 1992-03-27 1993-10-12 Autoload, Inc. Granular material transfer system
US5240324A (en) 1992-06-05 1993-08-31 Bluffton Agri/Industrial Corp. Continuous flow system for mixing and processing bulk ingredients
US5379923A (en) 1992-06-17 1995-01-10 Eagle Packaging Corp. Hopper for a weighing machine
EP0587085A3 (en) 1992-09-11 1994-09-14 Ihde Stefan Klaus Alfred Method and device for dosing and mixing multicomponent material
US5364242A (en) 1992-11-25 1994-11-15 Pharmacia Deltec, Inc. Pump apparatus and method including double activation pump apparatus
US5261743A (en) 1993-04-27 1993-11-16 Hydreclaim Corporation Apparatus and methods for feeding a substantially uniform quantity of a mixture of materials having variable individual densities
US5423455A (en) 1993-06-25 1995-06-13 Acrison, Inc. Materials feeding system with level sensing probe and method for automatic bulk density determination
DE4323295C1 (en) 1993-07-12 1995-02-09 Manfred R Dr Hamm Dosing device
US5487603A (en) 1994-02-28 1996-01-30 Lextron, Inc. Intelligent system and process for automated monitoring of microingredient inventory used in the manufacture of medicated feed rations
DE4410087C2 (en) * 1994-03-24 1997-08-07 Mann & Hummel Filter Closure for a conveyor operating in a vacuum
DE4414233A1 (en) 1994-04-23 1995-10-26 Wuerschum Gmbh Device for measuring powdered or granular material to be weighed
US5450984A (en) 1994-04-29 1995-09-19 K-Tron Technologies, Inc. Material feeding apparatus
KR100195646B1 (en) 1994-08-26 1999-06-15 나카가와 야스오 Combined metering apparatus
US5639995A (en) 1995-04-03 1997-06-17 Upper Limits Engineering Co. Apparatus and method for controlling a vibratory feeder in a weighing machine
NL1000379C2 (en) 1995-05-17 1996-11-19 Arwo Bv Holder for transporting a granular or powdered material.
US5651401A (en) 1995-06-14 1997-07-29 Sahara Natural Foods, Inc. Apparatus for filling receptacles
US5599099A (en) 1995-08-11 1997-02-04 K-Tron Technologies, Inc. Material blending apparatus having a pivotally mounted hopper
US5599101A (en) 1995-09-01 1997-02-04 Pardikes; Dennis G. Dry polymer processing system
JPH0981856A (en) 1995-09-11 1997-03-28 Kyoto Jido Kiki Kk Powder granule gate and powder/granule weighing equipment including the gate
US6155709A (en) 1995-09-11 2000-12-05 Vervant Limited Blending apparatus
JP3698277B2 (en) 1995-11-28 2005-09-21 テルモ株式会社 Infusion pump
US6188936B1 (en) 1995-12-11 2001-02-13 Maguire Products Inc Gravimetric blender with operatively coupled bar code reader
DE69627717T2 (en) 1995-12-11 2004-01-29 Maguire Products Inc GRAVIMETRIC MIXER
DE19614688C2 (en) 1996-04-13 2002-04-11 Azo Gmbh & Co Device for producing a mixture of different bulk material components
US5896297A (en) 1996-04-15 1999-04-20 Valerino, Sr.; Fred M. Robotube delivery system
US6057514A (en) 1996-06-28 2000-05-02 Maguire; Stephen B. Removable hopper with material shut-off
US6089794A (en) 1996-08-09 2000-07-18 Maguire; Stephen B. Vacuum loading system
DE69732659T2 (en) 1996-12-13 2005-12-29 Maguire Products, Inc. GRAVIMETRIC MIXER OF REDUCED DIMENSIONS WITH REMOVABLE FEEDING DEVICE
USD424587S (en) 1997-05-30 2000-05-09 Maguire Stephen B Gravimetric blender
US5843513A (en) 1997-01-02 1998-12-01 Kraft Foods, Inc. Method and apparatus for injecting dry solids particulates into a flow of ground meat
CA2278239C (en) 1997-01-17 2003-12-23 Niagara Pump Corporation Linear peristaltic pump
US5772319A (en) 1997-02-12 1998-06-30 Pemberton; Paul A. Material loader for injection molding press
US6111206A (en) 1997-02-15 2000-08-29 Maguire; Stephen B. Apparatus and method for gravimetric blending with horizontal material feed
GR1002892B (en) 1997-02-17 1998-04-10 Micrel Linear peristaltic pump
US6467943B1 (en) 1997-05-02 2002-10-22 Stephen B. Maguire Reduced size gravimetric blender
US5871200A (en) 1997-06-09 1999-02-16 Vov Enterprises, Inc. Water well recharge throttle valve
DE69814786T2 (en) 1997-06-13 2004-03-18 Vervant Ltd. mixer
US6599005B2 (en) 1997-06-13 2003-07-29 Hosokawa Micron Bv Intensive mixer
DE19736979C1 (en) 1997-08-25 1999-04-08 Windmoeller & Hoelscher Process for feeding plastic granulate into the inlet opening of a plastic extruder
CA2303873C (en) 1997-09-19 2009-02-03 Maguire Products, Inc. Low pressure dryer
SE510507C2 (en) * 1998-01-09 1999-05-31 Paer Wellmar Method and plant for pneumatic transport of solid particles
US6131174A (en) 1998-08-27 2000-10-10 Lucent Technologies Inc. System and method for testing of embedded processor
US20030075626A1 (en) 1998-10-28 2003-04-24 Maguire Stephen B. Shuttle granulator
US6405949B1 (en) 1998-10-28 2002-06-18 Stephen B. Maguire Shuttle granulator
US6386841B1 (en) 1998-12-28 2002-05-14 Schmidt, Kranz & Co. Gmbh Pneumatically operated hydraulic pump
DE19912277A1 (en) * 1999-03-18 2000-09-21 Mann & Hummel Protec Gmbh Device for conveying plastic granulate
US6102562A (en) 1999-05-04 2000-08-15 Jenike & Johanson, Inc. Removable container insert
US6409618B1 (en) 1999-10-14 2002-06-25 Spalding Sports Worldwide,Inc. Self-contained sport ball inflation mechanism
DE19959473A1 (en) * 1999-12-10 2001-06-13 Frederic Dietrich Device and method for the pneumatic conveying of powdery substances and use of the device
US6340487B1 (en) 2000-03-28 2002-01-22 Wenger Manufacturing, Inc. Multiple purpose quick-changeover extrusion system
NL1014783C2 (en) 2000-03-29 2001-10-02 Hosokawa Micron B V Reactor for solid fermentation (VSF).
US7234247B2 (en) 2000-06-16 2007-06-26 Maguire Stephen B Low pressure dryer
WO2002000335A1 (en) 2000-06-16 2002-01-03 Chroma Injecta Color Systems, Inc. Process and dispensing system for preparing liquid concentrates for plastics
US7347007B2 (en) 2000-06-16 2008-03-25 Maguire Stephen B Low pressure high capacity dryer for resins and other granular and powdery materials
WO2002060594A2 (en) 2001-01-31 2002-08-08 Maguire Products, Inc. Liquid color pumping method and supply apparatus
US6774318B2 (en) 2001-02-14 2004-08-10 Process Control Corporation Removable material hopper assembly and method of using same to eliminate residual ingredient material
ITMI20011352A1 (en) * 2001-06-27 2002-12-27 3V Cogeim S P A DISCHARGE GROUP OF THE DRIED PRODUCT PARTICULARLY FOR DRYING FILTERS AND SIMILAR
US7154069B1 (en) 2001-10-30 2006-12-26 Henny Penny Corporation Cooking apparatus and methods of employing such apparatus
US6880965B1 (en) 2002-01-15 2005-04-19 Robert W. Sheffield, Jr. Gate for mixer unit of a concrete transport vehicle
US20050052945A1 (en) 2002-01-31 2005-03-10 Maguire Stephen B. Method and apparatus for storing and delivering liquid color material
US7137729B2 (en) 2002-03-28 2006-11-21 Moretto S.P.A. Gravimetric dosing and mixing apparatus for a plurality granular products
AU151295S (en) 2002-05-02 2003-03-31 Stem Drive Ltd Mixing device
US20030218014A1 (en) 2002-05-22 2003-11-27 Gregory Walter Jay Closure mechanism for chemical reaction kettle
US20050039816A1 (en) 2003-06-20 2005-02-24 Maguire Stephen B. Vacuum powered method and apparatus for wirelessly handling and conveying granular material
JP4176608B2 (en) 2003-10-09 2008-11-05 日本電信電話株式会社 Optical communication network system and wavelength routing device therefor
WO2005058707A2 (en) * 2003-12-15 2005-06-30 Polymer Group, Inc. Unitized fibrous construct dispensing system
US7846399B2 (en) * 2004-03-23 2010-12-07 W.R. Grace & Co.-Conn. System and process for injecting catalyst and/or additives into a fluidized catalytic cracking unit
DE102004019703A1 (en) * 2004-04-20 2006-01-12 Volkmann Gesellschaft mit beschränkter Haftung Method and device for inerting vacuum conveyors
DE102005054253B3 (en) 2005-11-11 2007-06-06 Inoex Gmbh Device for producing a mixture of different bulk material components
GB0523338D0 (en) * 2005-11-16 2005-12-28 Inbulk Technologies Ltd Vacuum conveying velocity control device
US7810986B2 (en) 2005-11-21 2010-10-12 Process Control Corporation Systems and methods for liquid dosing of material in a blender system
RU2395442C2 (en) * 2005-12-07 2010-07-27 Марикап Ой Method and device for material transportation and ejector device
WO2007139106A1 (en) * 2006-05-31 2007-12-06 Sintokogio, Ltd. Pressurized tank, device for feeding powder to transportation pipe and its feeding method, and method of determining feeding interval of powder to transportation pipe
US7958915B2 (en) 2006-06-16 2011-06-14 Maguire Stephen B Liquid color gravimetric metering apparatus and methods
US20070292288A1 (en) 2006-06-16 2007-12-20 Maguire Stephen B Multiple pusher liquid color pump
US7980834B2 (en) 2006-06-16 2011-07-19 Maguire Stephen B Liquid color injection pressure booster pump and pumping methods
US10201915B2 (en) 2006-06-17 2019-02-12 Stephen B. Maguire Gravimetric blender with power hopper cover
US8092070B2 (en) 2006-06-17 2012-01-10 Maguire Stephen B Gravimetric blender with power hopper cover
ITVR20070083A1 (en) * 2007-06-12 2008-12-13 Moretto Spa PLANT FOR PNEUMATIC TRANSPORT AT CONTROLLED SPEED OF GRANULAR MATERIAL AND PROCEDURE FOR THE CONTROL OF CONVEYANCE SPEED
US8070844B2 (en) 2007-08-31 2011-12-06 Maguire Stephen B Dust clearing blow-back valve and reservoir
FI20075749L (en) * 2007-10-24 2009-04-25 Maricap Oy Method and equipment in a material vacuum transfer system
US8104997B2 (en) 2008-04-14 2012-01-31 Maguire Stephen B Bulk resin unloading apparatus and method
EP2143484B1 (en) 2008-07-11 2012-02-01 Vervant Limited Blender for delivery of blend additives to a plastics extrusion device or the like
USD612878S1 (en) 2008-09-22 2010-03-30 Hatchtech Group B.V. Cyclone separator
US20100170659A1 (en) 2009-01-08 2010-07-08 Maguire Stephen B Molding apparatus and method with heat recovery
USD633119S1 (en) 2009-04-07 2011-02-22 Gea Westfalia Separator Gmbh Separator having a drive
IT1397049B1 (en) 2009-12-24 2012-12-28 Wam Spa LOADING EQUIPMENT FOR A SILO
US20120138191A1 (en) 2010-12-03 2012-06-07 Jack Harris System for delivering solid particulate matter for loading
FI125140B (en) * 2013-07-30 2015-06-15 Maricap Oy Apparatus for influencing the material to be transferred in the material transfer channel
RU2535821C1 (en) * 2013-10-31 2014-12-20 Закрытое Акционерное Общество "Твин Трейдинг Компани" Air vacuum device for transfer of loose materials with high weight concentration
US10138075B2 (en) 2016-10-06 2018-11-27 Stephen B. Maguire Tower configuration gravimetric blender
US20150321860A1 (en) * 2014-02-20 2015-11-12 Stephen B. Maguire Vacuum powered resin loading system without central control
DE202014101787U1 (en) 2014-04-15 2014-04-30 Dr. Herfeld Gmbh & Co. Kg mixer
US10179696B2 (en) 2015-01-27 2019-01-15 Novatec, Inc. Variable opening slide gate for regulating material flow into airstream
US9833755B2 (en) 2015-05-27 2017-12-05 The Young Industries, Inc. System for mixing/blending fine bulk materials
US9834390B2 (en) 2016-04-19 2017-12-05 Apex Business Holdings, L.P. Bulk cargo blending hopper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111136817A (en) * 2020-01-07 2020-05-12 区志棚 System for be used for polyurethane combined material automatic blending
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