WO2009052892A1 - Verfahren und vorrichtung zur kontinuierlichen herstellung eines extrudats aus feinteiligem pflanzenmaterial und einem thermoplastischen material - Google Patents
Verfahren und vorrichtung zur kontinuierlichen herstellung eines extrudats aus feinteiligem pflanzenmaterial und einem thermoplastischen material Download PDFInfo
- Publication number
- WO2009052892A1 WO2009052892A1 PCT/EP2008/007205 EP2008007205W WO2009052892A1 WO 2009052892 A1 WO2009052892 A1 WO 2009052892A1 EP 2008007205 W EP2008007205 W EP 2008007205W WO 2009052892 A1 WO2009052892 A1 WO 2009052892A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thermoplastic material
- extrusion
- extruder
- extrusion device
- plant material
- 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
- 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 fillers or of fibrous materials, e.g. short-fibre reinforcements
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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
- B29C48/375—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
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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
- B29C48/40—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 two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
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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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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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
- B29C48/07—Flat, e.g. panels
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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
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
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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
- B29C48/29—Feeding the extrusion material to the extruder in liquid form
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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
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
- B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0026—Flame proofing or flame retarding agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0032—Pigments, colouring agents or opacifiyng agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0047—Agents changing thermal characteristics
- B29K2105/005—Heat sensitisers or absorbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/256—Sheets, plates, blanks or films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
- B29K2311/10—Natural fibres, e.g. wool or cotton
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
- B29K2711/14—Wood, e.g. woodboard or fibreboard
Definitions
- the invention relates to a process for the continuous production of an extrudate of finely divided plant material and a thermoplastic material, in which the finely divided plant material and subsequently the thermoplastic material is fed to an extrusion device designed as a twin-screw extruder be extruded together from the extruder to form the extrudate, wherein the plant material is embedded in the thermoplastic material.
- Extrudates for example in the form of continuously produced shaped articles, such as profiles, plates and the like, of a finely divided plant material embedded in thermoplastic material are known and are commonly referred to by the name WPC (wood-plastic composite).
- WPC extrudates consist of a wood fiber or wood flour content of 50-90% and a plastic matrix of polypropylene (PP) or less frequently polyethylene (PE).
- PP polypropylene
- PE polyethylene
- WPC extrudates offer the advantage of the free three-dimensional formability of the Material and a significantly greater moisture resistance.
- WPC extrudates also offer advantages, namely higher stiffness and a significantly lower coefficient of thermal expansion. Examples of applications of such WPC molded articles can be found, for example, as wood substitutes for outdoor floor coverings as well as applications in the construction sector and the furniture industry.
- thermoplastic material thus forming the carrier matrix
- the abovementioned methods are in need of improvement with regard to the achievable output rates, which are decisive for the economic production of WPC extrudates, and furthermore make high demands on the quality of the plant material used, in particular its moisture content, and can lead to difficulties with fluctuating product quality, for example in that the added plant material tends to form lumps in the thermoplastic material and therefore no desirable homogenization of the materials is possible.
- the object of the invention is therefore to propose a method and a device with which the above-described disadvantages of the prior art are overcome.
- the invention proposes a method according to the features of patent claim 1.
- a device according to the invention is the subject of patent claim 9.
- the proposal according to the invention provides that the feeding of the plant material and of the thermoplastic material into the extrusion device is effected at a common or two immediately successive positions, the thermoplastic material being plasticized before being fed into the extrusion device into a separate plasticizing extruder and already in this plasticized state of the extrusion device is supplied and then the plant material contained in the extrusion device and is degassed together with the thermoplastic material.
- the proposal according to the invention is therefore based on initially supplying the finely divided plant material to an extrusion device designed as a twin-screw extruder, but immediately or simultaneously feeding the thermoplastic material to the extrusion device designed as a twin-screw extruder, the thermoplastic material already being plasticized in a separate plasticizing extruder and consequently as Melt in liquid or at least pasty form under the pressure of the plasticizing extruder is introduced into the extrusion device.
- the plant material and the thermoplastic material are fed at the same place or at two immediately successive locations in the extrusion device, so that it Consequently, it is no longer necessary to promote the initially supplied plant material over a certain distance alone in the extrusion direction and to subject processing steps, for example, a dehumidification.
- the spacing of the directly successive feed positions for the finely divided plant material and the thermoplastic material is determined only by constructional conditions, such as by arranging two feed tubes with their corresponding diameter in the extrusion direction directly behind one another. "Immediately following one another" in the sense according to the invention therefore means distances of only a few mm up to 1 - 2 d, where d denotes the diameter of the extruder screw (n).
- the vegetable material and the thermoplastic material are supplied together in the so-called intake area of the extruder, wherein the thermoplastic material has previously been completely melted in a plasticizing extruder and is therefore introduced as a liquid or pasty melt under pressure in the extrusion device.
- the pressure generated by the plasticizing extruder on the output side, with which the " plasticized thermoplastic material is supplied to the extrusion device, is preferably less than 20 bar, preferably about 10 to 15 bar.
- thermoplastic material Since the individual feed positions of the finely divided plant material and of the thermoplastic material are as close as possible to each other within the feed zone of the extrusion device, a reverse order can also be considered, i. It is first the thermoplastic material in the already plasticized state and immediately following or simultaneously fed the finely divided plant material of the extrusion device.
- the thermoplastic material used is preferably a polyolefin, for example a polypropylene or else a high-density polyethylene.
- Other thermoplastic materials such as polyamide or polyvinyl chloride may be used.
- the vegetable material may be wood fibers available in large quantities or wood flour, grain fibers, straw, natural fibers such as coconut or palm fibers and also MDF chips. These plant materials may be used singly or in mixtures thereof.
- the proportion of the supplied plant material amounts to at least 50%, preferably at least 70%, so that the remaining portion of the thermoplastic material and optionally other processing aids is formed.
- the vegetable material should have average particle sizes of less than 4 mm to allow good homogenization.
- the process according to the invention places only small demands on the moisture content of the vegetable material used.
- the vegetable material has a moisture content of less than 10%, preferably 5 to 8%.
- Such moisture contents are usually present in the vegetable materials obtained on the market, as they are intended for use in the device according to the invention, anyway, so that the inventive method manages without additional dehumidification step for the plant material used.
- the moisture contained in the vegetable material is discharged according to the invention in the extrusion device by degassing, wherein at the time of degassing, the vegetable material is already mixed with the supplied in the plasticized state thermoplastic material.
- At least one additive such as UV stabilizers, antifouling agents, fungicides, crop protection agents, flame retardants, dyes or processing aids, such as lubricants, may be added to the vegetable material prior to feeding into the extruder to- are mixed and then introduced together with the vegetable material in the extrusion device.
- a device proposed in the context of the invention which is suitable in particular for carrying out the method according to the invention, is characterized in that it comprises an extrusion device designed as a twin-screw extruder with an inlet opening and an outlet opening and a feed device for the plant material assigned to the inlet opening and the thermoplastic material and a vent formed between the inlet and outlet openings.
- the feeder comprises two feed channels immediately adjacent in the extrusion direction, one connected to a plant material dosing station and the other connected to a plasticizing extruder for the thermoplastic material.
- the first feed channel viewed in the extrusion direction serves to supply the plant material and is therefore connected to the metering station for the plant material and the immediately following second feed channel is connected to the plasticizing extruder for the thermoplastic material.
- the reverse arrangement it is also possible to choose the reverse arrangement.
- the extrusion device comprises a twin-screw extruder with counter-rotating screws which preferably mesh with each other.
- the extrusion device can also be formed by a twin-screw extruder with co-rotating screws. If the pressure capability of such a double-screw extruder operating in the same direction does not suffice, a downstream melt pump can be provided in this case in order to apply sufficient pressure for the extrusion of the extrudate from a corresponding tool.
- the plasticizing extruder for plasticizing and introducing the already plasticized thermoplastic material into the extrusion device is designed according to a proposal of the invention as a single-screw extruder and connected via a heatable connecting pipe with the feeder.
- a multi-screw extruder in particular a twin-screw extruder, which not only allows to plasticize the thermoplastic material, but also to incorporate fillers and additives into the thermoplastic material as needed, can also be used as the plasticizing extruder.
- a twin-screw extruder used as a plasticizing extruder can be equipped with screws operating in the same direction or in opposite directions.
- a counter-rotating twin screw plasticizing extruder is particularly suitable for processing a PVC dry blend.
- the metering station can have at least one metering container for plant material components, wherein a plurality of different plant material components can also be processed together by forming a plurality of metering containers for plant material components.
- the dosing station preferably has at least one dosing unit, by means of which dyes, additives and / or processing aids can be added and are therefore supplied together with the plant material components of the extrusion device.
- the single FIGURE shows, in a greatly simplified schematized illustration, an extrusion device 1 which is designed as a twin-screw extruder with two screws which rotate in opposite directions and intermesh with each other.
- the extrusion device 1 has at its one end via an inlet opening 10 for the materials to be processed and at its other end via an outlet opening 11 which nachgen a unspecified tool 5 is orders, from which the formed extrudate 6 emerges in the direction of arrow P according to the direction of extrusion marked with arrow E.
- a plasticizing extruder 4 which is provided separately by the extrusion device 1, and a metering device 3, both of which communicate with the inlet opening 10 of the extrusion device 1 in a manner described in more detail below.
- the inlet opening 10 of the extrusion device 1 is provided with a feed device 2, which has two feed channels, namely a first feed channel 20 viewed in the extrusion direction and a second feed channel 21 arranged directly below. Since both feed channels 20, 21 via the inlet opening 10 with the extrusion device 1 communicate via these feed channels 20, 21 introduced materials in the selected order in the feed zone of the extruder, which is designated in Figure 1 with Z1.
- the first feed channel 20, viewed in the extrusion direction, is connected via a connecting tube 34 to a metering station 3, which has several, here two metering containers 30, 31 for finely divided components of the plant material to be processed, and several, here two metering units 32, 33 for dyes , Additives and / or processing aids additionally comprises. All components of the dosing station 3 are introduced together via the connecting pipe 34 and the first feed channel 20 into the extrusion device 1.
- the separately provided plasticizing extruder 4 for example a single-screw extruder, is fed via a feed device 40 with the thermoplastic material to be processed, for example pure polypropylene.
- the plasticizing extruder 4 created from this pure polypropylene in a conventional manner known per se, a polypropylene melt, which initiates the plasticizing 4 under a corresponding pressure of eg 10 to 15 bar via a heated connecting pipe 41 in the second feed channel 21 of the feeder 2 for the extrusion device 1.
- the introduction of the melted and plasticized thermoplastic material likewise takes place in the feed zone Z1 of the extrusion device 1, specifically immediately after the feed of the vegetable material and optionally further additives, dyes and / or processing aids via the connecting tube 34 and the first feed channel 20th
- the distance between the two feed channels 20, 21 is about 1 - 2 d, where d denotes the diameter of the screw, not shown, of the twin-screw extruder 1.
- zone Z3 the mixture of vegetable material and thermoplastic material is further mixed and extruded under high pressure through the extrusion die 5 not shown to the desired extruded strand 6, which leaves the extrusion device 1 in the direction of arrow P.
- the plasticizer 1 used was a twin-screw extruder from Reifen Reifenberger of the BT 75-30D series with a screw diameter of 75 mm and a L / D ratio of 30, which had counter-intermeshing screw pairs. From a single-screw plasticizing extruder, a thermoplastic material in an amount of 20% based on the obtained extrudate was plasticized and supplied to the extruder, while on the other hand, 80% of a fine-particle wood flour having an average grain size ⁇ 4 mm was fed to the extruder.
- the extrudate obtained was characterized by excellent homogenization of the supplied plant material in the thermoplastic material and by good dimensional stability.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008801121792A CN101827697B (zh) | 2007-10-18 | 2008-09-04 | 用于连续制备由植物材料细末和热塑性材料制成的挤出物的方法和装置 |
| EP08785804A EP2207662B1 (de) | 2007-10-18 | 2008-09-04 | Verfahren und vorrichtung zur kontinuierlichen herstellung eines extrudats aus feinteiligem pflanzenmaterial und einem thermoplastischen material |
| CA2702374A CA2702374C (en) | 2007-10-18 | 2008-09-04 | Process and device for the continuous production of an extrudate from finely divided plant material and a thermoplastic material |
| US12/734,200 US20100295207A1 (en) | 2007-10-18 | 2008-09-04 | Process and device for the continuous production of an extrudate from finely divided plant material and a thermoplastic material |
| US13/645,953 US20130028999A1 (en) | 2007-10-18 | 2012-10-05 | Process and device for the continuous production of an extrudate from finely divided plant material and a thermoplastic material |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007050317.4 | 2007-10-18 | ||
| DE102007050317 | 2007-10-18 | ||
| DE102008010796.4 | 2008-02-23 | ||
| DE102008010796A DE102008010796A1 (de) | 2007-10-18 | 2008-02-23 | Verfahren und Vorrichtung zur kontinuierlichen Herstellung eines Extrudats aus feinteiligem Pflanzenmaterial und einem thermoplastischen Material |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/645,953 Division US20130028999A1 (en) | 2007-10-18 | 2012-10-05 | Process and device for the continuous production of an extrudate from finely divided plant material and a thermoplastic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009052892A1 true WO2009052892A1 (de) | 2009-04-30 |
Family
ID=40459043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/007205 Ceased WO2009052892A1 (de) | 2007-10-18 | 2008-09-04 | Verfahren und vorrichtung zur kontinuierlichen herstellung eines extrudats aus feinteiligem pflanzenmaterial und einem thermoplastischen material |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US20100295207A1 (de) |
| EP (1) | EP2207662B1 (de) |
| CN (1) | CN101827697B (de) |
| CA (1) | CA2702374C (de) |
| DE (1) | DE102008010796A1 (de) |
| WO (1) | WO2009052892A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130010566A1 (en) * | 2010-03-30 | 2013-01-10 | Sumitomo Bakelite Company Limited | Kneading apparatus and method for producing semiconductor encapsulating resin composition |
| CN103522518A (zh) * | 2013-01-14 | 2014-01-22 | 许黎明 | 多功能木塑复合材料一步法挤出机 |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2691559A1 (en) * | 2007-06-28 | 2008-12-31 | Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik | Device for producing blown films |
| EP2298678B1 (de) * | 2009-09-18 | 2012-02-22 | Reifenhäuser GmbH & Co. Maschinenfabrik | Wickelvorrichtung |
| CN103737735A (zh) * | 2013-12-31 | 2014-04-23 | 贵州森瑞新材料股份有限公司 | Pvc管生产中色母的配入方法及其装置 |
| US9975588B2 (en) | 2014-03-24 | 2018-05-22 | Saf-Holland, Inc. | Fifth wheel coupler safety control system |
| ES2625736T3 (es) * | 2014-09-10 | 2017-07-20 | Starlinger & Co. Gesellschaft M.B.H. | Dispositivo y procedimiento para la producción de un material compuesto polimérico relleno |
| EP3216583B1 (de) | 2016-03-11 | 2021-04-28 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Koextrusionsadapter |
| CN106313474B (zh) * | 2016-08-16 | 2019-04-19 | 李泽英 | 用于制备热塑性聚合物制品的挤出装置、设备和方法 |
| DE102016224607A1 (de) * | 2016-12-09 | 2018-06-14 | Raumedic Ag | Silikonextrusionsanlage, Verfahren zur Silikonextrusion sowie hierdurch hergestelltes Silikonextrudat |
| FR3096702B1 (fr) * | 2019-06-03 | 2023-10-20 | Brava Ip Llc | Système de tuile de couverture et procédé de fabrication |
| JP7437106B2 (ja) * | 2020-06-25 | 2024-02-22 | トヨタ車体株式会社 | 繊維強化樹脂組成物の製造方法 |
| TW202428414A (zh) * | 2022-08-31 | 2024-07-16 | 義大利商沙克米機械合作伊莫拉公司 | 以包括天然材料之複合材料製造物件的方法及裝置 |
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| CN1478014A (zh) * | 2000-11-28 | 2004-02-25 | ͨ�õ�����˾ | 成型和加工含有热塑性树脂的共混物的方法 |
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| DE202004011742U1 (de) * | 2004-07-27 | 2004-10-14 | REIFENHäUSER GMBH & CO. MASCHINENFABRIK | Koextrusionsadapter |
-
2008
- 2008-02-23 DE DE102008010796A patent/DE102008010796A1/de not_active Ceased
- 2008-09-04 US US12/734,200 patent/US20100295207A1/en not_active Abandoned
- 2008-09-04 CA CA2702374A patent/CA2702374C/en not_active Expired - Fee Related
- 2008-09-04 EP EP08785804A patent/EP2207662B1/de not_active Not-in-force
- 2008-09-04 CN CN2008801121792A patent/CN101827697B/zh not_active Expired - Fee Related
- 2008-09-04 WO PCT/EP2008/007205 patent/WO2009052892A1/de not_active Ceased
-
2012
- 2012-10-05 US US13/645,953 patent/US20130028999A1/en not_active Abandoned
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| AT307012B (de) * | 1969-12-12 | 1973-05-10 | Buss Ag | Einrichtung zur kontinuierlichen Herstellung von faserstoffhaltigen Preßmassen |
| JPS60141519A (ja) * | 1983-12-29 | 1985-07-26 | Kobe Steel Ltd | 合成樹脂とガラス繊維の混合方法並びに装置 |
| DE19860836C1 (de) | 1998-12-30 | 2000-05-18 | Haller Formholz | Verfahren und Vorrichtung zum kontinuierlichen Herstellen von Formkörpern |
| WO2000040384A1 (de) | 1998-12-30 | 2000-07-13 | Haller Formholz | Verfahren und vorrichtung zum kontinuierlichen herstellen von formkörpern |
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| US20020185771A1 (en) * | 2001-05-02 | 2002-12-12 | The Japan Steel Works, Ltd. | Method and apparatus for making pellets of wood meal compound |
| WO2005039843A1 (en) * | 2003-10-24 | 2005-05-06 | Bryan Holdings Inc. | Manufacture of extruded synthetic wood structural materials |
| US20060255496A1 (en) * | 2004-12-01 | 2006-11-16 | Wells Paul M | Low heat build-up capstock system and extrusion technology for solid and foamed profiles in dark colors |
| US20060199893A1 (en) | 2005-03-03 | 2006-09-07 | Magna International Inc. | Method and system of compounding fiber reinforced thermoplastic |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130010566A1 (en) * | 2010-03-30 | 2013-01-10 | Sumitomo Bakelite Company Limited | Kneading apparatus and method for producing semiconductor encapsulating resin composition |
| US9694513B2 (en) * | 2010-03-30 | 2017-07-04 | Sumitomo Bakelite Company Limited | Kneading apparatus and method for producing semiconductor encapsulating resin composition |
| CN103522518A (zh) * | 2013-01-14 | 2014-01-22 | 许黎明 | 多功能木塑复合材料一步法挤出机 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100295207A1 (en) | 2010-11-25 |
| US20130028999A1 (en) | 2013-01-31 |
| DE102008010796A1 (de) | 2009-04-23 |
| CN101827697B (zh) | 2013-09-18 |
| CA2702374A1 (en) | 2009-04-30 |
| CA2702374C (en) | 2015-11-17 |
| EP2207662B1 (de) | 2013-03-20 |
| CN101827697A (zh) | 2010-09-08 |
| EP2207662A1 (de) | 2010-07-21 |
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