WO2012126715A1 - Vorrichtung zum extrudieren einer polymerschmelze - Google Patents
Vorrichtung zum extrudieren einer polymerschmelze Download PDFInfo
- Publication number
- WO2012126715A1 WO2012126715A1 PCT/EP2012/053713 EP2012053713W WO2012126715A1 WO 2012126715 A1 WO2012126715 A1 WO 2012126715A1 EP 2012053713 W EP2012053713 W EP 2012053713W WO 2012126715 A1 WO2012126715 A1 WO 2012126715A1
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- WO
- WIPO (PCT)
- Prior art keywords
- housing
- mixer
- extruder
- mixing
- melt
- Prior art date
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Classifications
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- 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
- B29B7/405—Mixing heads
- B29B7/407—Mixing heads with a casing closely surrounding the rotor, e.g. with conical rotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
- B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/2123—Shafts with both stirring means and feeding or discharging means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
- B01F27/272—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces
- B01F27/2722—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces provided with ribs, ridges or grooves on one surface
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- 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
- B29B7/82—Heating or cooling
- B29B7/823—Temperature control
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- 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
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- 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
- B29C48/297—Feeding the extrusion material to the extruder at several locations, e.g. using several hoppers or using a separate additive feeding
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- 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
- B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
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- 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
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- 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
- B29C48/455—Screws arranged to convey material towards each other, e.g. separate screws arranged after each other and feeding in opposite directions
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- 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
- B29C48/54—Screws with additional forward-feeding elements
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- 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
- B29C48/565—Screws having projections other than the thread, e.g. pins
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- 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
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
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- 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
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92019—Pressure
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
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- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92361—Extrusion unit
- B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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- 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
- B29C48/55—Screws having reverse-feeding elements
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- 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
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
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- 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
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
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- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
Definitions
- the invention relates to a device for extruding a polymer melt according to the preamble of claim 1.
- additives such as additives, dyes, stabilizers, lubricants or other polymers are incorporated into the base polymer.
- the additives are preferably supplied to the plastic melt immediately before or during the extrusion. Such additives must be evenly distributed in the plastic melt during extrusion.
- DE 197 15 925 A1 discloses a device in which an extruder interacts with a mixer.
- a mixer is arranged at the outlet end of the extruder, whose mixing shaft is coupled to an extruder screw of the extruder.
- the extrusion chamber formed in the extruder is thus extended by a mixing chamber, which is connected at the end with a melt outlet.
- Such devices basically have the disadvantage that the extruder screw and the mixing shaft are driven together with the same drive speed, so that no individual adjustment for driving the extruder screw and for driving the mixing shaft is given.
- an adapter housing is arranged, on which a melt outlet is formed.
- the invention is characterized in that the interface between the extruder and the mixer is used not only for the transfer of the plastic melt but also for the delivery of the plastic melt via the melt outlet.
- the temperature load remains limited to the housing parts of the device, which are also tempered independently of the drive means.
- Another advantage of the invention is that the matched to the extruder melt connections of an existing extrusion system can be used directly and can be coupled without modification with the melt outlet of the device according to the invention. This allows retrofitting to be carried out on existing extrusion systems in a simple manner.
- the mixing shaft and the extruder screw can be driven with high flexibility by separate drives, wherein the mixing shaft with the same or opposite direction of conveyance relative to the extruder screw is driven.
- the extrusion chamber at one inlet end is assigned a main inlet in the extruder housing and the mixing chamber has a secondary inlet in the mixing housing.
- the additives can be supplied both via the main inlet or via the secondary inlet of the melt.
- the development of the invention is preferably carried out, in which the mixer housing is formed in several parts and having a housing with the adapter housing cooperating distributor housing, wherein the distributor housing at least one inlet channel for connecting the extrusion chamber of the extruder with the mixing chamber of the mixer and in which the distributor housing has at least one return channel for connecting the mixing chamber of the mixer to the melt outlet of the adapter housing.
- the melt flow is determined solely by housing parts of the mixer.
- the distributor housing has a cylindrical distributor head, which is held in a receiving bore of the adapter housing and which delimits the extrusion chamber within the extruder.
- the distributor head can be placed directly at the end of the extruder screw, so that the melt exiting from the extrusion chamber is led directly to the mixer chamber via one or more feed channels.
- the development of the invention has proven particularly useful in which the mixer housing in the mixing chamber has a plurality of housing rings, which are held pressure-tight in the mixer housing and form a groove system within the mixing chamber together with a mixing section of the mixing shaft ,
- the mixer housing in the mixing chamber has a plurality of housing rings, which are held pressure-tight in the mixer housing and form a groove system within the mixing chamber together with a mixing section of the mixing shaft ,
- the housing rings are preferably formed such that at least within the mixer housing, a melt channel is formed, which connect the inlet channel or the return channel of the distributor housing with a connection channel to a bearing housing of the mixer housing, wherein the connection channel opens into the mixing chamber. This allows melt ducts to be made in both directions parallel to the mixing chamber.
- the mixing shaft is preferably formed at the mixing section with at least one conveying zone with a screw flight on the circumference of the mixing shaft which extends between a plurality of mixing zones.
- the mixing shaft thus promoting the polymer melt and thus a pressure build-up within the mixer is possible.
- An impermissible pressure drop within the mixing chamber can thus be advantageously avoided.
- a plurality of controllable tempering devices are assigned to the extruder housing and the mixer housing, by means of which the respective housings can be selectively cooled or heated.
- the temperature of the polymer melt can be kept substantially constant in the operating state of the device.
- the heating of the housing guarantees a minimum operating temperature of the device.
- the relevant housing parts can be cooled by the tempering.
- the Tempering device could for this purpose have electrical heating strips and a heating jacket surrounding the cooling jacket, which is preferably connected to a fan.
- the tempering of the extruder housing and the mixer housing are preferably controlled independently.
- extrusion systems are optionally operated only with an extruder or with an extruder-mixer combination.
- the development of the invention is particularly advantageous in which the extruder is optionally executable with or without mixer, wherein the adapter housing cooperates with the mixer or with a measuring head.
- Such measuring heads which have measuring connections for sensors, are generally known in the prior art and could thus be fastened directly to the adapter housing instead of the mixer, in order to supply the polymer melt passing out of the extrusion chamber at the end of the extruder screw directly to the melt outlet.
- 1 is a schematic diagram of an overall view of a first embodiment of the mixer according to the invention
- Fig. 2 shows schematically a cross-sectional view of the embodiment of Fig. 1 in the region of the extruder end
- FIG. 3 shows a schematic cross-sectional view of a further exemplary embodiment in the region of the end of the extruder.
- FIG Fig. 4 Scheme table a cross-sectional view of another embodiment of the device according to the invention in the region of the extruder end.
- a first embodiment of the device according to the invention is shown schematically in an overall view.
- the embodiment comprises an extruder 1 and a dynamic mixer 2, which are assembled into a structural unit.
- the extruder 1 has an extruder housing 4, which forms an extrusion chamber 7 in the interior, in which an extruder screw 6 is guided.
- the main inlet 5 is schematically characterized by a hopper.
- the guided inside the extruder housing 4 extruder screw 6 is connected at one end to an extruder drive 3.
- the opposite end of the extruder screw 6 is free and ends in the extrusion chamber 7.
- the extruder housing 4 is associated with a tempering 8.1.
- an adapter housing 13 is provided, which is pressure-tight manner connected to the extruder housing 4.
- the adapter housing 13 has a melt outlet 14, which is aligned transversely to the extrusion chamber 7.
- a mixer housing 9 Fixed to the adapter housing 13.
- a mixing chamber 11 is formed, in which a mixing shaft 12 protrudes with a free end.
- the mixing shaft 12 is at a protruding from the mixer housing 9 end with a mixer drive 10th connected.
- a secondary inlet 15 is provided, which is connected to the mixing chamber 11 in the interior of the mixing housing 9.
- the secondary inlet 15 is also indicated symbolically in FIG. 1 by a filler neck.
- Fig. 2 is a cross-sectional view of the embodiment of Fig. 1 in the region of the extruder end s Darge presents.
- the adapter housing 13 is connected by a flange 33 at one end face to the extruder housing 4 and on the opposite end side to the mixer housing 9 pressure-tight.
- the adapter housing 13 has a central receiving bore 18, which is formed concentrically to the extrusion chamber 7.
- a transverse bore 34 is formed in the adapter housing 13, which carries a pipe socket 32 for forming the melt outlet 14.
- the pipe socket 32 penetrates the adapter housing 13 to the receiving bore 18th
- the flange connection 33 between the mixer 2 and the adapter housing 13 is formed by a distributor housing 16.
- the mixer housing 9 is designed in several parts.
- the distributor housing 16 delimits the mixing chamber 11 within the mixing housing 9.
- the front end of the distributor head 17 is conical and adapted to the free end of the extruder screw 6.
- At the free end face of the distributor head 17 a plurality of distributed on the circumference inlet channels 19 are formed, which completely penetrate the distributor housing 6.
- a return passage 20 is provided which is L-shaped and establishes a connection between the melt outlet 14 and the mixing chamber 11.
- the mixer housing 9 has a plurality of housing rings 23 and at the drive end a bearing housing 24, which are pressure-tightly connected to each other.
- the mixing chamber 11 extends between the distributor housing 16 and the bearing housing 24, wherein the bearing housing 24 encloses a bearing bush 30, in which a bearing portion of the mixing shaft 12 is mounted.
- the housing rings 23 form the mixing chamber 11.
- the mixing shaft 12 is guided with a mixing section which is adapted in diameter to the mixing chamber 11, the mixing section of the mixing shaft 12 being divided into several zones.
- the mixing section of the mixing shaft 2 within the mixing chamber 11 has a central conveying zone and two mixing zones delimiting the conveying zone.
- the mixing shaft 12 has on the circumference a plurality of mixing grooves 27, which form a groove system with a plurality of housing grooves 25 formed in the housing rings 23.
- the housing grooves 25 are for this purpose formed in partial regions on the inner diameter of the housing rings 23.
- the mixing grooves 27 on the circumference of the mixing shaft 12 are in contrast distributed over the entire circumference of the mixing shaft 12 and aligned in the radial direction.
- the mixing shaft 12 has a worm gear 26 on the circumference.
- the worm gear 26 extends in Substantially to the inner diameter of the associated housing ring 23, so that upon rotation of the mixing shaft 12, a promotion of the melt in the direction return passage 20 occurs.
- the housing rings 23 form, outside the mixing chamber 11, a plurality of melt channels 21, which interact with the inlet channels 19 in the distributor housing 16.
- the melt channels 21 open into respectively assigned connection channels 22 in the bearing housing 24.
- the connection channels 22 open at one end into the mixing chamber 11.
- the bearing housing 24 has an inlet channel 35, which the secondary inlet 15 with the mixing chamber 11 connects.
- the bearing housing 24 has a bearing bore which is concentric with the mixing chamber 11 and serves to receive a bearing bush 30.
- the bushing 30 extends over the entire length of the bearing housing.
- a bearing portion of the mixing shaft 12 is slidably mounted.
- the mixing shaft 12 protrudes with a drive portion of the bearing housing 24 and is connected at the free end via a gear 31 to the mixer drive 10.
- the mixer drive 10 is formed in this embodiment by an electric motor.
- a tempering 8.2 is provided at the periphery of the mixer housing 9 .
- the tempering device 8.2 has a plurality of electrical heating strips 28, which are arranged distributed on the circumference of the mixer housing 9.
- the heating bands 28 are coupled to a heating control, not shown here.
- the heating bands 28 and the mixer housing 9 are surrounded by a cooling jacket 29, which is connected to a fan. Via the blower 36, a cooling air can be blown into the cooling jacket 29.
- the extruder screw 6 is driven by the extruder drive 3 and the mixer shaft 12 through the mixer drive 10 with opposite direction of conveyance in operation.
- a polymer supplied via the main inlet 5 is introduced as granules into the extrusion chamber 7.
- the polymer is melted by the rotation of the extruder screw 6 and conveyed as a polymer melt to the end of the extruder screw 6.
- the polymer melt is received via the inlet channels 19 and passed through the melt channels 21 and the connection channels 22 into the mixing chamber 11.
- an additive of the polymer melt is added via the secondary inlet 15, so that takes place within the mixing chamber 11 by rotation of the mixing shaft 12, a mixing of the polymer melt.
- the polymer melt is conveyed back to the distributor housing 16 within the mixing chamber 11 and fed to the melt outlet 14 via the return channel 20.
- FIG. 3 shows a further exemplary embodiment as a dynamic mixer in a cross-sectional view, as would be used, for example, in the exemplary embodiment according to FIG.
- the embodiment of FIG. 3 is substantially identical to the embodiment of FIG. 2, so that only the differences will be explained at this point.
- the mixer housing 9 is flanged to the adapter housing 13 via a distributor housing 16.
- the mixer housing 9 also consists in this embodiment of a plurality of housing parts, which are formed by the distributor housing 16, the housing rings 23 and the bearing housing 24.
- the distributor housing 16 also has a distributor head 17 which extends to the free end of the extruder head. Worm 6 extends. In the center of the distributor head 17, an inlet channel 19 is formed which penetrates the distributor housing 16 and connects the extrusion chamber 7 in the extruder housing 4 with the mixing chamber 11 in the mixing housing 9.
- the mixing shaft 12 within the mixing chamber 11 is driven in the same direction to the extruder screw 6, so that the polymer melt is conveyed through the extruder screw 6 and the mixing shaft 12 in a constant conveying direction.
- the secondary inlet 15 and an inlet channel 35 are formed directly in a first housing ring 23, which is held adjacent to the bearing housing 24.
- the additive is fed into the mixing chamber 11 at the free end of the mixer shaft 12.
- a connecting channel 22 is provided on the bearing housing 24, which cooperates with a housing rings 23 penetrating melt channel 21.
- the melt channel 21 opens at the end of the housing rings 23 directly into a return channel 20 in the distributor housing 16.
- the return channel 20 opens into the melt outlet 14, so that the polymer melt produced can be fed to an extrusion process.
- the embodiments of the device according to the invention shown in Figures 2 and 3 have the particular advantage that the dynamic mixer 2 can be combined with conventional extruders. As an alternative, the extruders can be used without a dynamic mixer to produce a plastic melt.
- FIG. 4 shows an embodiment in which the outlet end of the extruder shown in FIG. see is shown.
- the adapter housing 13 at the end of the extruder 1 is identical to the embodiment of FIGS. 2 and 3 and connected directly to the extruder housing 4.
- a measuring head 37 is arranged, which protrudes with a cylindrical filler 38 into the receiving bore 18 of the adapter housing 13.
- the filler 38 has a recess 39 which is adapted to the free end of the extruder screw 6 and forms a connection to the melt outlet 14 in the adapter housing 13.
- the device according to the invention can advantageously be used optionally with a dynamic mixer or without a dynamic mixer for producing a plastic melt.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012001305.0T DE112012001305A5 (de) | 2011-03-19 | 2012-03-05 | Vorrichtung zum Extrudieren einer Polymerschmelze |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011014467.6 | 2011-03-19 | ||
DE102011014467A DE102011014467A1 (de) | 2011-03-19 | 2011-03-19 | Vorrichtung zum Extrudieren einer Polymerschmelze |
Publications (1)
Publication Number | Publication Date |
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WO2012126715A1 true WO2012126715A1 (de) | 2012-09-27 |
Family
ID=45894433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2012/053713 WO2012126715A1 (de) | 2011-03-19 | 2012-03-05 | Vorrichtung zum extrudieren einer polymerschmelze |
Country Status (2)
Country | Link |
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DE (2) | DE102011014467A1 (de) |
WO (1) | WO2012126715A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3453514A1 (de) * | 2017-09-12 | 2019-03-13 | Next Generation Analytics GmbH | Vorrichtung und verfahren zum filtern und entgasen einer kunststoffschmelze |
FR3130279A1 (fr) * | 2021-12-15 | 2023-06-16 | Arkema France | Procédé continu de préparation de polyamide par polycondensation |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1905104A1 (de) | 1969-02-01 | 1970-08-06 | Bayer Ag | Extruder |
US3787160A (en) * | 1969-02-01 | 1974-01-22 | Bayer Ag | Apparatus having extrusion and mixing zones |
DE2739998A1 (de) * | 1977-09-06 | 1979-03-08 | Berstorff Gmbh Masch Hermann | Strangpressvorrichtung zur herstellung von geschaeumten kinststoff |
US4652138A (en) * | 1983-11-02 | 1987-03-24 | Kabushiki Kaisha Kobe Seiko Sho | Single screw kneading extruder |
EP0234074A1 (de) * | 1986-02-21 | 1987-09-02 | CROMPTON & KNOWLES CORPORATION | Herstellung von länglichen vernetzten Gegenständen |
EP0340873A1 (de) * | 1988-05-03 | 1989-11-08 | Universiteit Twente | Mischvorrichtung mit Verteilungsmischwirkung für eine Schneckenpresse, eine Spritzgiessmaschine und dergleichen |
DE4236662A1 (en) * | 1991-11-02 | 1993-05-06 | Frank 7000 Stuttgart De Truckenmueller | Extruder for use with long fibre FRP - feeds fibres continuously into barrel and has special recesses on screw and barrel wall to mix in long fibres without shortening them |
DE19715125A1 (de) | 1996-05-03 | 1997-11-06 | Barmag Barmer Maschf | Mischvorrichtung, insbesondere zum Mischen von Kunststoffschmelzen und Additiven |
DE19715925A1 (de) | 1996-04-16 | 1997-11-13 | Mando Machine Co Ltd | Gleichrichter für eine Fahrzeuglichtmaschine |
-
2011
- 2011-03-19 DE DE102011014467A patent/DE102011014467A1/de not_active Withdrawn
-
2012
- 2012-03-05 WO PCT/EP2012/053713 patent/WO2012126715A1/de active Application Filing
- 2012-03-05 DE DE112012001305.0T patent/DE112012001305A5/de not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1905104A1 (de) | 1969-02-01 | 1970-08-06 | Bayer Ag | Extruder |
US3787160A (en) * | 1969-02-01 | 1974-01-22 | Bayer Ag | Apparatus having extrusion and mixing zones |
DE2739998A1 (de) * | 1977-09-06 | 1979-03-08 | Berstorff Gmbh Masch Hermann | Strangpressvorrichtung zur herstellung von geschaeumten kinststoff |
US4652138A (en) * | 1983-11-02 | 1987-03-24 | Kabushiki Kaisha Kobe Seiko Sho | Single screw kneading extruder |
EP0234074A1 (de) * | 1986-02-21 | 1987-09-02 | CROMPTON & KNOWLES CORPORATION | Herstellung von länglichen vernetzten Gegenständen |
EP0340873A1 (de) * | 1988-05-03 | 1989-11-08 | Universiteit Twente | Mischvorrichtung mit Verteilungsmischwirkung für eine Schneckenpresse, eine Spritzgiessmaschine und dergleichen |
DE4236662A1 (en) * | 1991-11-02 | 1993-05-06 | Frank 7000 Stuttgart De Truckenmueller | Extruder for use with long fibre FRP - feeds fibres continuously into barrel and has special recesses on screw and barrel wall to mix in long fibres without shortening them |
DE19715925A1 (de) | 1996-04-16 | 1997-11-13 | Mando Machine Co Ltd | Gleichrichter für eine Fahrzeuglichtmaschine |
DE19715125A1 (de) | 1996-05-03 | 1997-11-06 | Barmag Barmer Maschf | Mischvorrichtung, insbesondere zum Mischen von Kunststoffschmelzen und Additiven |
Also Published As
Publication number | Publication date |
---|---|
DE102011014467A1 (de) | 2012-09-20 |
DE112012001305A5 (de) | 2014-01-09 |
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