EP2819828A1 - Vorrichtung zum zuführen von granulat und füllmaterial zu einer extruderschnecke eines extruders - Google Patents

Vorrichtung zum zuführen von granulat und füllmaterial zu einer extruderschnecke eines extruders

Info

Publication number
EP2819828A1
EP2819828A1 EP13708334.1A EP13708334A EP2819828A1 EP 2819828 A1 EP2819828 A1 EP 2819828A1 EP 13708334 A EP13708334 A EP 13708334A EP 2819828 A1 EP2819828 A1 EP 2819828A1
Authority
EP
European Patent Office
Prior art keywords
cyclone
screw
extruder
discharge opening
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13708334.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Schmalholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSW Machinery Handels GmbH
Original Assignee
BSW Machinery Handels GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSW Machinery Handels GmbH filed Critical BSW Machinery Handels GmbH
Publication of EP2819828A1 publication Critical patent/EP2819828A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/66—Recycling the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/422—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw sections co-operating, e.g. intermeshing, with elements on the wall of the surrounding casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/426—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with consecutive casings or screws, e.g. for charging, discharging, mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/885—Adding charges, i.e. additives with means for treating, e.g. milling, the charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/02—Dispensing from vessels, e.g. hoppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/10—Feeding of the material to be moulded, e.g. into a mould cavity of several materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2567—Hopper or feeder parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/275—Recovery or reuse of energy or materials
    • B29C48/277—Recovery or reuse of energy or materials of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/501—Extruder feed section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/681—Barrels or cylinders for single screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/042—Mixing disintegrated particles or powders with other materials, e.g. with virgin materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/424—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with conical screw surrounded by conical casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/425—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw surrounded by a casing provided with grooves or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2563—Mounting or handling of the hopper or feeder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the invention relates to a device for feeding granulate and filler material to an extruder screw of an extruder, comprising a cyclone with an inlet opening for introducing a flow of pneumatically conveyed filling material and a discharge opening for discharging the precipitated from the flow of filling material, a hopper for the fresh Granules and a mixing section, which are fed to the filling material and the fresh granules from the hopper.
  • a disadvantage of the method described is that the shredded waste at the discharge opening of the cyclone tend to bridge formation, so that the risk of clogging of the discharge opening is.
  • the bridging causes the degree of filling of the screw conveyor is varied or reduced. There are a number of reasons for bridging, such as the static charge of the chips, the tendency of the chips to agglomerate and the low weight of the chips. The smaller the size of the individual chips, the greater the risk of bridging.
  • the tendency to bridge formation also depends on a number of environmental conditions, such as the ambient heat and humidity, so that overall there is an uncontrollable and therefore unsatisfactory situation.
  • the invention therefore aims to make the return of the shredded waste in the extruder more reliable, in particular avoiding bridging of the chips and the mass flow rate when removing the chips from the cyclone to be improved and made uniform. Furthermore, the return or supply of any other filling materials should be accomplished as the aforementioned Schnitzel. Finally, the design should be as space-saving as possible, so that the delivery routes can be shortened.
  • the invention essentially provides for the cyclone to be arranged at least partially in the feed hopper and coaxially therewith, so that the discharge opening of the cyclone projects into a discharge area of the hopper which surrounds the discharge opening in an annular manner immersed, and that a plug screw axially passes through the discharge opening of the cyclone and protrudes into the mixing path axially adjoining the discharge opening. Due to the fact that the filling material, in particular the chips, is not removed by means of a screw running vertically and underneath the discharge opening, but by means of a screwing screw passing axially through the discharge opening, it is possible to substantially increase the degree of filling of the screw.
  • Clogging of the discharge opening by agglomerated filling material is prevented in that the filling material is no longer discharged from the cyclone solely on the basis of gravity, but is forcibly conveyed through the discharge opening with the aid of the filling screw.
  • In the inlet area of the plug screw is a blockage thereby Prevents air circulation inside the cyclone keeping the filling material loose.
  • the coaxial arrangement of the cyclone and the hopper for the fresh granules leads to a very compact design, which does not require long transport routes. This increases reliability and minimizes operating costs.
  • the discharge opening of the cyclone dips into a discharge area of the discharge hopper which surrounds the discharge opening in an annular manner so that the filling material is mixed with the fresh granulate immediately after it has left the cyclone.
  • no vertical transport to a separate mixing device is required, but the mixing takes place in a mixing section axially adjoining the discharge opening, the mixing or the further transport through this mixing section being promoted by the stuffing screw protruding into the mixing section.
  • the stuffing screw preferably extends through the entire mixing section and ends immediately above the extruder screw running transversely to the stuffing screw. This leads to an increase in the degree of filling of the extruder screw.
  • a preferred embodiment provides that the shaft of the screw plug passes through the cyclone axially and is led out of the cyclone via a dip tube.
  • a suitable drive engages the shaft in order to set the shaft in rotation.
  • a particularly efficient discharge of the filling material from the cyclone preferably succeeds in that the cyclone has a conically tapering separating section and an adjoining cylindrical conveying region, through which the Stopping screw extends and whose inner diameter substantially corresponds to the outer diameter of the screw plug.
  • the degree of filling of the stuffing screw is advantageously increased even further by the stuffing screw having a conical envelope surface converging in the transport direction in the lowest section of the separating line. This ensures that the filling material accumulating at the lower end of the separating section of the cyclone is forced into the inlet region of the cylindrical conveying region.
  • the conical initial section of the stuffing screw also leads to the stuffing screw not being able to fall out of the cyclone through the discharge opening and collide with the extruder screw in the event of a possible breakage of its shaft, which would lead to considerable damage to the plant parts.
  • a further preferred embodiment provides that the mixing section is funnel-shaped with a cross-section that tapers in the direction of transport. This leads to a compaction of the mixture of fresh granules and filling material and, subsequently, to a better homogenization of the mixture in the extruder screw.
  • a further reduction of the transport paths is preferably achieved by virtue of the fact that the mixing section has an outlet opening which can be connected to the extruder screw and that the stuffing screw extends up to the outlet opening.
  • the cylindrical conveyor region has grooves running longitudinally on its inner circumference cooperating with the plug screw.
  • the depth of the grooves increases Transport direction continuously from, ie the grooves run out.
  • FIG. 1 shows a perspective view of the device according to the invention
  • FIG. 2 shows a perspective sectional view of the device according to FIG. 1
  • FIG. 3 shows a sectional view along a plane running transversely to the extruder screw.
  • a Aufgäbetriehter 1 is shown for fresh granules, the granular task is denoted by 2.
  • the feed hopper has a first cylindrical section 3 and a funnel-shaped, i.e. the conically tapering section 5 towards the discharge opening 4.
  • the funnel-shaped section 5 is adjoined by a cylindrical discharge area 6 with an annular flange 7, on which a funnel-shaped, i. is attached to the outlet opening 8 conically tapered transport section 9, which forms a mixing section.
  • the transport section 9 is connected to the delivery pipe 10 of an extruder screw 11.
  • a cyclone 12 is arranged coaxially in the feed hopper 1 and its inlet cylinder 13 protrudes from the feed hopper 1.
  • a flow of filling material in particular of shredded waste is supplied.
  • the introduced flow rate is brought by tangential blowing on a circular path.
  • the separation path forming cone 15 increases the rotational speed to such an extent that the chips are thrown by the centrifugal force to the cone walls and slowed down so far that they detach from the flow and trickle down in the direction of the discharge opening 16.
  • the delivery medium in particular air, expels the cone 15 upwards through the central dip tube 17.
  • FIGS. 2 and 3 show that the cyclone 12, following the cone 15, has a cylindrical conveying section 18, at the end of which the discharge opening 16 is located.
  • the stuffing screw 19 passes through the cylindrical conveying section 18 and the discharge opening 16 in the axial direction and is connected to a drive shaft 20, which is led out of the cyclone via the immersion tube 17.
  • the drive shaft is mounted in a gear 21 which is secured to a platform 22 which is supported by a plurality of uprights 23 on the top wall of the cyclone 12.
  • a motor 24 drives the drive shaft 20 via the transmission 21 at.
  • the StopfSchnecke 19 cooperates with the cylindrical conveyor section 18 for the axial removal of the accumulating at the lower end of the cone 15 Schnitzel.
  • the plug screw 19 has a conical, tapered to cylindrical delivery section 18 towards the envelope surface, whereby the degree of filling of the stuffing screw 19 can be increased.
  • the stuffing screw 19 further projects beyond the discharge opening 16 out of the cyclone 12 and extends into the mixing section formed by the funnel-shaped transport section 9 as far as the extruder screw 11.
  • a maintenance and inspection opening with a pipe 25 is provided which any irregularities during operation, such as a blockage can be remedied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Cyclones (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP13708334.1A 2012-02-28 2013-02-19 Vorrichtung zum zuführen von granulat und füllmaterial zu einer extruderschnecke eines extruders Withdrawn EP2819828A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA254/2012A AT512170B1 (de) 2012-02-28 2012-02-28 Vorrichtung zum Zuführen von Granulat und Füllmaterial zu einer Extruderschnecke eines Extruders
PCT/AT2013/000030 WO2013126933A1 (de) 2012-02-28 2013-02-19 Vorrichtung zum zuführen von granulat und füllmaterial zu einer extruderschnecke eines extruders

Publications (1)

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EP2819828A1 true EP2819828A1 (de) 2015-01-07

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EP13708334.1A Withdrawn EP2819828A1 (de) 2012-02-28 2013-02-19 Vorrichtung zum zuführen von granulat und füllmaterial zu einer extruderschnecke eines extruders

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Country Link
US (1) US9227344B2 (ru)
EP (1) EP2819828A1 (ru)
CN (1) CN104520091A (ru)
AT (1) AT512170B1 (ru)
RU (1) RU2597610C2 (ru)
WO (1) WO2013126933A1 (ru)
ZA (1) ZA201406766B (ru)

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Also Published As

Publication number Publication date
US9227344B2 (en) 2016-01-05
US20150023742A1 (en) 2015-01-22
RU2014138936A (ru) 2016-04-20
WO2013126933A1 (de) 2013-09-06
AT512170B1 (de) 2013-06-15
CN104520091A (zh) 2015-04-15
AT512170A4 (de) 2013-06-15
ZA201406766B (en) 2015-11-25
RU2597610C2 (ru) 2016-09-10

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