WO2021107331A1 - 압출장치 - Google Patents
압출장치 Download PDFInfo
- Publication number
- WO2021107331A1 WO2021107331A1 PCT/KR2020/010739 KR2020010739W WO2021107331A1 WO 2021107331 A1 WO2021107331 A1 WO 2021107331A1 KR 2020010739 W KR2020010739 W KR 2020010739W WO 2021107331 A1 WO2021107331 A1 WO 2021107331A1
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- Prior art keywords
- raw material
- zone
- barrel
- screw
- thread
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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
- B29B7/42—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
- B29B7/429—Screws
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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
- B29C48/36—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
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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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
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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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with 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
- B29C48/03—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
- B29C48/04—Particle-shaped
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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
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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
- B29C48/55—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
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped 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
- B29C48/68—Barrels or cylinders
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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
- B29C48/763—Vent constructions, e.g. venting means avoiding melt escape
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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
- B29C48/92—Measuring, controlling or regulating
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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
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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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
- B29C2948/92504—Controlled parameter
- B29C2948/92704—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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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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
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/91—Heating, e.g. for cross linking
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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
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
Definitions
- the present invention relates to an extrusion apparatus for extruding a raw material in a solid state containing moisture, and more particularly, an extrusion in which a section in which the raw material forms a sealing film is provided in the barrel to prevent the water vapor discharged from the raw material from flowing backward. It's about the device.
- thermoplastic resin produced by emulsion polymerization the raw materials contain a large amount of moisture because the produced thermoplastic resin is generally obtained in a latex state together with a dispersion medium.
- the manufacturing process of the thermoplastic resin includes a dehydration and drying process to remove moisture.
- the dried raw material was heated and pressurized using an extrusion apparatus as shown in FIG. 1 to obtain the dried raw material as pellets.
- the conventional extrusion apparatus is provided with a hopper 2 into which raw materials are put on one side of a tubular barrel 1, and an internal screw 5 is installed. It is configured to be discharged through the outlet (the left outlet in the drawing).
- the raw material injected through the hopper 2 is heated through a heater (not shown) mounted inside or outside the barrel and pressed by the screw 5 . Accordingly, the water vapor generated from the moisture remaining in the dried raw material while being moved by the screw 5 is separated. The separated water vapor is discharged to the outside through the vent part 6 disposed at a distance from the hopper 2 .
- a prevention plate 4 for minimizing the effect of water vapor backflow and an input screw 3 for forcibly injecting raw materials into the barrel are additionally mounted on the hopper 2 .
- the main object of the present invention is to provide an extrusion apparatus capable of directly extruding the dehydrated raw material without the drying step, and increasing the extrusion efficiency by preventing the water vapor separated from the raw material from flowing back into the hopper. .
- an extrusion apparatus for extruding a raw material in a solid state containing moisture, has a hollow tube shape along the longitudinal direction, and a hopper into which the raw material is input is coupled to one side and , The other side is formed with a discharge port through which the dehydrated raw material is discharged, a slot portion opening the inside and the outside is formed in a specific section between the discharge port and the hopper; a screw mounted inside the barrel and having a rod shape and having a thread formed on an outer circumferential surface so as to transfer the raw material input from the hopper to the discharge port while rotating in one direction; and a heater unit mounted on the barrel to heat the raw material, wherein the raw material introduced into the barrel through the hopper is gradually heated by the heater unit while being transferred in the barrel through the screw, and the screw has a screw thread.
- a kneading zone is formed in which compression of the raw materials transferred by the It is characterized in that the heating temperature of the heater part and the shaft rotation speed of the screw are controlled so that the raw material (which has been in the state) forms a sealing film that shields the inner cross section of the barrel in the kneading zone.
- the kneading zone is disposed between the slot part and the hopper.
- the slot portion is formed with a plurality of slots spaced apart from each other.
- the plurality of slots may be formed at regular intervals along the circumference of the barrel. Any one or more of the slots may have a greater width than others.
- the distance between the kneading zone and the slot portion may be formed to be shorter than the length equal to three times the diameter of the barrel, and the distance between the kneading zone and the hopper may be formed to be longer than the length equal to five times the diameter of the barrel.
- the screw includes: a first forward zone in which a thread is formed so that the raw material input from the hopper is transferred toward the discharge port when the screw is rotated; a kneading zone in which a screw thread is formed so that the raw material transferred from the first forward zone is compressed when the shaft rotates; and a second forward zone in which a thread is formed so that the raw material passing through the kneading zone is transferred toward the outlet when the shaft rotates.
- the kneading zone a neutral zone in which a thread is formed on the outer peripheral surface of the rod-shaped to induce in-situ rotation of the raw material; or a reverse zone in which a thread is formed on the outer circumferential surface of the rod to transport the raw material in the opposite direction to the thread formed in the first forward zone.
- the kneading zone includes a neutral zone in which a thread is formed on the rod-shaped outer peripheral surface to induce in-situ rotation of the raw material, and a reverse zone in which a thread is formed to transport the raw material in the opposite direction to the thread formed in the first forward zone on the rod-shaped outer peripheral surface. It may be configured to be connected, wherein the neutral zone is connected to the first forward zone, and the reverse zone is connected to the second forward zone.
- the screw further includes a first sub-kneading zone in which a thread is formed so that recompression of the raw material transferred from the second forward zone is made when the screw rotates.
- the screw further includes a third forward zone in which a thread is formed so that the raw material passing through the first sub-kneading zone is transferred toward the discharge port when the screw is rotated, and within the range in which the third forward zone is formed, the barrel has A sub-slot unit for discharging the gas separated from the raw material may be formed.
- the screw further includes a second sub-kneading zone in which a thread is formed so that recompression of the raw material transferred from the third forward zone is made when the screw rotates.
- the screw further includes a fourth forward zone in which a thread is formed so that the raw material passing through the second sub-kneading zone is transferred toward the discharge port when the screw rotates, and within the range in which the fourth forward zone is formed, the barrel has A sub-vent part for discharging impurities contained in the raw material to the outside is formed.
- It may further include a pulverizing device for pulverizing the raw material discharged from the outlet of the barrel.
- a sealing film is formed in the kneading zone while the extrusion of the raw material is in progress in the barrel, thereby preventing or minimizing the reverse flow of water vapor toward the hopper.
- the kneading zone may include one of a neutral zone or a reverse zone, or a combination of both, it may be selectively applied according to the state and properties of the raw material.
- the screw may further include the first and second sub-kneading zones, it is possible to form an additional sealing film, thereby more effectively blocking the reverse flow of water vapor.
- FIG. 1 is a perspective view showing an internal appearance of a conventional extrusion apparatus.
- Figure 2 is a perspective view showing the inside of the extrusion apparatus according to the present invention through a perspective view.
- FIG. 3 is an enlarged view illustrating a section in which a kneading zone is formed in FIG. 2 .
- Figure 4 is a view showing embodiments (A, B, C) of the threads that can be applied to the kneading zone of the present invention.
- FIG. 5 is a view showing cross-sectional views before and after the sealing film is formed in the kneading zone.
- Figure 6 is a view showing each relative distance based on the diameter (D) of the barrel in the extrusion apparatus of the present invention.
- the present invention relates to an extrusion apparatus for extruding a raw material in a solid state containing moisture.
- an extrusion apparatus according to the present invention will be described in more detail with reference to the accompanying drawings.
- the extrusion apparatus includes a barrel 10, a screw 30 mounted in the barrel 10, and the inside of the barrel 10 It is characterized in that it comprises a slot part 40A for discharging the water vapor of the outside, and a heater part 60 for heating the barrel 10 .
- a sealing film is formed in the barrel 10 by the molten raw material.
- the barrel 10 has a hollow pipe shape along the longitudinal direction, a hopper 20 into which the raw material is input is coupled to one side, and a discharge port 11 through which the dehydrated raw material is discharged is formed on the other side.
- the barrel 10 is preferably made of a metal with excellent chemical resistance to prevent corrosion by volatile substances and water vapor discharged from the raw material, or the inner surface is coated with a protective material, etc. It is manufactured to have sufficient rigidity to withstand pressure.
- the screw 20 has a rod shape, and has a structure in which threads (M: 31, 32, 33) are formed on an outer circumferential surface. Then, the raw material input from the hopper 20 is transferred to the discharge port 11 while being mounted inside the barrel 10 and rotating in one direction.
- the screw 30 is spirally formed along the longitudinal direction on the outer circumferential surface of the screw 30, and the portion in which the thread M is formed in the direction of moving the raw material toward the inlet is the forward zone (F1, F2, F3, F4). section), and the thread is formed so that the movement of the raw material is stopped and only rotation is made, or the part where the thread is formed so that the reverse movement of the raw material (i.e., moving from the outlet of the barrel to the hopper) is made is a kneading zone (30A), It is divided into a first sub-kneading zone 30B and a second sub-kneading zone 30C.
- the thread is configured to compress rather than feed the raw material. (The upper figure of FIG. 3 showing the enlarged section K1 in which the kneading zone 30A is formed in FIG. 2 and FIG. 4 showing the shape of the threads applicable to the kneading zone 30A, the kneading zone 30A ), the thread is configured to compress rather than feed the raw material. (The upper figure of FIG. 3 showing the enlarged section K1 in which the kneading zone 30A is formed in FIG. 2 and FIG. 4 showing the shape of the threads applicable to the kneading zone 30A, the kneading zone 30A ), the thread is configured to compress rather than feed the raw material. (The upper figure of FIG.
- the kneading zone 30A is the raw material on the outer circumferential surface of the rod-shaped It may include a neutral zone in which the neutral thread 32 is formed so as to induce the in-situ rotation of the , and/or a reverse zone in which the reverse thread 33 is formed to transfer the raw material to the rod-shaped outer circumferential surface in the reverse direction.
- the present invention provides a configuration in which a kneading zone is provided only with a neutral zone, a configuration in which a kneading zone is provided only with a reverse zone, and a configuration in which the neutral zone and the reverse zone are combined as Examples 1, 2, and 3, respectively.
- the neutral screw thread 32 formed in the neutral zone is not in the form of a spirally connected thread as shown in FIG. 4(C), but an individually separated form (that is, a form in which a ring-shaped thread is connected at intervals). etc.) may be formed.
- an individually separated form that is, a form in which a ring-shaped thread is connected at intervals). etc.
- the reverse thread 33 formed in the reverse zone is formed in the opposite direction to the thread formed in the forward zone, as shown in FIGS. 3 and 4 (B).
- This type of reverse thread 33 generates a force to feed the raw material in the opposite direction when it arrives.
- the neutral zone and the reverse zone may be combined.
- the raw material arrives in the kneading zone 30A in which the neutral zone and/or the reverse zone are formed, the raw material is agglomerated with the raw material in the back side continuously supplied through the forward zone and is subjected to pressure.
- the screw 30 may have sections F1, F2, F3, F4 in which a plurality of forward zones are formed and sections K1 and K2 in which a plurality of kneading zones are formed. That is, as shown in FIG. 2, from the side close to the hopper 20, the first forward zone (section F1), the kneading zone (section K1), the second forward zone (section F2), the first sub-kneading zone (section K2) ), a third forward zone (section F3), a second sub-kneading zone (section K3), and a fourth forward zone (section F4) are arranged.
- a forward thread 31 is formed so that the raw material input from the hopper 20 is transferred toward the discharge port 11 when the first forward zone rotates, and the kneading zone 30A is the screw 30 when the shaft rotates.
- a neutral screw thread 32 or a reverse screw thread 33 is formed to compress the raw material transferred from the first forward zone.
- the first sub-kneading zone 30B and the second sub-kneading zone 30C also have a neutral thread 32 or a reverse thread 33 similar to the kneading zone 30A, and the second forward zone and the third forward A forward thread 31 is formed in the zone and the fourth forward zone as in the first forward zone.
- a slot portion 40A is formed in the barrel 10 so that steam (and separated gas, etc.) is discharged after the raw material passes through the kneading zone 30A from the hopper 20 .
- the slot portion 40A is formed with a plurality of slots spaced apart from each other.
- the slot is formed in the shape of an elongated hole (hole), it is preferable to be arranged parallel to the longitudinal direction of the barrel (10).
- the slots may be formed at regular intervals along the circumference of the barrel 10 . That is, in the case of the barrel 10 in the form of a cylindrical tube, the slot portion 40A may be formed so that the slots are arranged in a ring shape along the entire circumference of the barrel 10 . However, the slot may be configured to be formed only in a specific portion of the barrel 10 so as to control the discharge direction of water vapor inside the barrel 10 .
- a slot of a specific portion may have a greater width or width than other slots.
- the slot formed on the lower surface of the barrel 10 may be formed narrow and small to prevent the falling of the raw material, and the slot formed on the upper surface may be formed wider and larger to facilitate the discharge of water vapor.
- slot portion 40A may be provided in the form of a simply perforated hole, but an openable and openable valve, an exhaust device for evacuating water vapor by steel, and a safety vent that is opened only when the pressure is higher than a predetermined pressure may be additionally coupled. have.
- a heater unit 60 for generating heat is coupled to the outer surface (or inside) of the barrel 10 .
- the heater unit 60 may be a device for converting electrical energy into thermal energy or a device for heating the barrel by receiving a heat source from the outside.
- a plurality of the heater units 60 are mounted over the entire barrel 10 , and each heater unit 60 is configured to be individually temperature controlled. Accordingly, the barrel 10 is configured to enable temperature control for each section (forwarding zone, kneading zone).
- the extrusion apparatus of the present invention having the configuration as described above, when the raw material stored in the hopper 20 is supplied into the barrel 10, the raw material is transferred inside the barrel 10 through the screw 30, and the heater Heating (and cooling) to the target temperature is achieved by the unit 60 .
- the heated and pressurized raw material is melted in the kneading zone 30A (or before reaching the kneading zone), and at least a part or most of the raw material is phase-changed to a liquid state.
- the raw material heated and pressurized in the kneading zone 30A has a force to spread radially by the centrifugal force generated in the kneading zone 30A while the phase change is made from a solid state to a highly viscous liquid state.
- FIG. 5 which shows cross-sectional views before and after the sealing film is formed in the kneading zone 30A
- the front (closer to the hopper) of the kneading zone 30A is a solid raw material and separated from the raw material.
- Water vapor, etc. is spread into the space between the screw 30 and the barrel 10, and as heat and pressure are continuously applied, the back side of the kneading zone 30A (closer to the discharge port) is in a solid state.
- Most of the fuel is in a liquid state. is melted with At this time, the molten raw material forms a sealing film that shields the cross section of the barrel 10 by centrifugal force.
- the thickness of the sealing film or the position at which it is formed may vary depending on the rotation speed of the screw 30 , the heating temperature of the heater unit 60 , and the configuration of the threads formed in the kneading zone 30A, but the sealing film is the barrel 10 . ) is formed in a fluid state, not in a fixed state.
- the sealing film is formed as a liquid film, and as the raw material is continuously supplied, the raw material that first formed the sealing film is discharged to the second forward zone through the kneading zone 30A, and the raw material supplied later is liquid In this state, it replenishes the raw material discharged first and maintains the sealing film.
- the heating temperature of the heater unit 60 and the shaft rotation speed of the screw are controlled according to the state and amount of the input material so that the sealing film can be continuously maintained.
- the liquid raw material and gaseous water vapor that have passed through the kneading zone 30A are transferred to the second forwarding zone area F2, where the liquid raw material is continuously transferred along the screw 30 while gas
- the water vapor in the state (and gas generated during phase change, etc.) is discharged to the outside through the slot part 40A.
- the reverse flow of the water vapor to the hopper 20 is blocked by the sealing film formed in the kneading zone 30A.
- the raw material that has reached the first sub-kneading zone 30B forms a sealing film again in the area K2 in the first sub-kneading zone 30B, and is transferred to the outlet 11 through the third forward zone. While being transferred through the third forward zone, the gas and excess water vapor contained in the raw material are discharged to the outside through the sub-slot part 40B.
- the configuration of the sub-slot part 40B may be the same as or similar to that of the slot part 40A described above.
- the raw material passing through the first sub-kneading zone 30B is transferred to the third forwarding zone area F3 to reach the second sub-kneading zone 30C.
- the raw material forms a sealing film again in the region K3 in the second sub-kneading zone 30C, and is discharged to the discharge port 11 through the fourth forward zone.
- the sub-vent part 50 is in the form of a tube so as to have a larger opening area than the slot part 40A and the sub-slot part 40B so that impurities (residual monomers, etc.) contained in the raw material can be finally discharged. may be provided.
- the raw material discharged to the discharge port 11 of the barrel 10 is discharged in the form of a solid mass after the steam and gas are separated and cooled.
- the raw material discharged in the form of a solid mass is cut into pellets of a certain size by the crushing device 70 for pulverizing the dehydrated (dried) raw material.
- the distance between each component is limited to increase drying and dehydration performance.
- the distance from the hopper 20 to the kneading zone 30A is preferably set to 5D to 10D.
- the distance between the kneading zone 30A and the slot portion 40A is preferably determined to be 3D or less, and the distance between the slot portion 40A and the first sub-kneading zone 30B is preferably determined to be 3D or more.
- the distance between the first sub-kneading zone 30B and the sub-slot part 40B and the distance between the sub-vent part 50 and the second sub-kneading zone 30C is preferably set within 3D.
- these relative distances are not limited to the above range, and may vary depending on the length of the screw 30 , the shaft rotation speed, the state of the raw material, the output of the heater unit 60 , and the like.
- a sealing film is formed in the kneading zone 30A while dehydration of the raw material is in progress in the barrel 10, thereby preventing or minimizing the reverse flow of water vapor toward the hopper 20.
- the kneading zone 30A may include one of a neutral zone or a reverse zone or a combination of both, it may be selectively applied according to the state and properties of the raw material.
- the screw 30 may further include a first sub-kneading zone 30B and a second sub-kneading zone 30C, so that an additional sealing film can be formed to more effectively block the backflow of water vapor. , it may be possible to maximally discharge water vapor from the slot portion 40A and the sub-slot portion 40B.
- the extrusion apparatus of the present invention since the moisture contained in the raw material is discharged to the slot part 40A and the sub-slot part 40B at the same time as the extrusion, impurities contained in the raw material in the sub-vent part 50 (residual monomers, etc.) It may be possible to discharge as much as possible.
- the extrusion apparatus of the present invention may be an apparatus for extruding a thermoplastic resin.
- the thermoplastic resin may be a thermoplastic resin that can be pelletized through an extrusion device, and as a specific example, may be a diene-based graft copolymer.
- the diene-based graft copolymer may be an acrylonitrile-butadiene-styrene-based graft copolymer.
- the diene-based graft copolymer is generally prepared by an emulsion polymerization method, and is obtained in a latex state in which the fine particles of the diene-based graft copolymer are dispersed in a colloidal state in a dispersion medium, that is, in a solid state containing moisture. do. Thereafter, the diene-based graft copolymer obtained in the latex state is obtained as a dry powder through aggregation, dehydration and drying steps.
- the diene-based graft copolymer obtained in the form of a dry powder has a problem in that a caking phenomenon occurs due to agglomeration and coagulation of the dry powder during long-term storage.
- the extrusion apparatus of the present invention can effectively remove moisture from the solid raw material containing moisture at the same time as extrusion, when extruding the diene-based graft copolymer using the extrusion apparatus of the present invention, latex There is no need for a drying process for the diene-based graft copolymer obtained in the state, and it may be possible to directly extrude the dehydrated diene-based graft copolymer.
- the diene-based graft copolymer extruded using the extrusion device of the present invention has a higher bulk density compared to the dry powder, thereby preventing the caking phenomenon during long-term storage.
- the extrusion apparatus of the present invention may be more effective in obtaining a thermoplastic resin, a specific example of a diene-based graft copolymer, and a more specific example of an acrylonitrile-butadiene-styrene-based graft copolymer.
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Abstract
Description
Claims (16)
- 수분을 함유한 고체상태의 원료를 압출시키는 압출장치에 있어서,길이 방향을 따라 속이 빈 관 형상을 가지며, 일측에 원료가 투입되는 호퍼가 결합되고, 타측에는 탈수된 원료가 배출되는 토출구가 형성되며, 내부와 외부를 개통하는 슬롯부가 상기 토출구와 호퍼 사이의 특정 구간에 형성된 배럴;상기 배럴 내부에 장착되어 일방향으로 축회전하는 동안 호퍼에서 투입된 원료를 토출구로 이송시키도록 봉형상을 갖고 외주면에 나사산이 형성된 스크류; 및상기 배럴에 장착되어 원료를 가열하는 히터부;를 포함하고,상기 호퍼를 통해 배럴 내부로 유입된 원료는 스크류를 통해 배럴 내부에서 이송되는 동안 히터부에 의해 점진적으로 가열되고,상기 스크류에는 나사산에 의해 이송되는 원료들의 압축이 발생하는 니딩존(kneading zone)이 형성되며,상기 배럴 내에서 원료가 용융되어 적어도 일부분이 액체상태로 상변화됨으로써, 상변화된 원료가 상기 니딩존에서 배럴의 내부 횡단면을 차폐하는 실링막을 형성하도록 히터부의 가열온도 및 스크류의 축회전 속도가 제어되는 것을 특징으로 하는 압출장치.
- 제 1 항에 있어서,상기 니딩존은 슬롯부와 호퍼 사이에 배치된 것을 특징으로 하는 압출장치.
- 제 1 항에 있어서,상기 슬롯부는 복수 개의 슬롯들(slot)이 서로 간에 간격을 두고 형성된 것을 특징으로 하는 압출장치.
- 제 3 항에 있어서,상기 복수 개의 슬롯들은 배럴의 둘레를 따라 일정 간격을 두고 형성된 것을 특징으로 하는 압출장치.
- 제 4 항에 있어서,상기 슬롯들 중 어느 하나 이상은 다른 것들 보다 더 큰 폭을 갖는 것을 특징으로 하는 압출장치.
- 제 2 항에 있어서,상기 니딩존과 슬롯부 사이의 거리는 배럴 직경의 3배가 되는 길이 보다 더 짧게 형성된 것을 특징으로 하는 압출장치.
- 제 2 항에 있어서,상기 니딩존과 호퍼 사이의 거리는 배럴 직경의 5배가 되는 길이 보다 더 길게 형성된 것을 특징으로 하는 압출장치.
- 제 2 항에 있어서,상기 스크류는,축회전할 때 호퍼에서 투입된 원료가 토출구쪽으로 이송되도록 나사산이 형성된 제1포워드존;축회전할 때 상기 제1포워드존에서 이송된 원료의 압축이 이뤄지도록 나사산이 형성된 니딩존;축회전할 때 상기 니딩존을 통과한 원료가 토출구쪽으로 이송되도록 나사산이 형성된 제2포워드존;을 포함하는 것을 특징으로 하는 압출장치.
- 제 8 항에 있어서,상기 니딩존은,봉형상의 외주면에 상기 원료의 제자리 회전이 유도되도록 나사산이 형성된 뉴트럴존;을 포함하는 것을 특징으로 하는 압출장치.
- 제 8 항에 있어서,상기 니딩존은,봉형상의 외주면에 제1포워드존에 형성된 나사산과 반대방향으로 원료를 이송하도록 나사산이 형성된 리버스존;을 포함하는 것을 특징으로 하는 압출장치.
- 제 8 항에 있어서,상기 니딩존은,봉형상의 외주면에 상기 원료의 제자리 회전이 유도되도록 나사산이 형성된 뉴트럴존과 봉형상의 외주면에 제1포워드존에 형성된 나사산과 반대방향으로 원료를 이송하도록 나사산이 형성된 리버스존이 연결되어 구성되되,상기 뉴트럴존은 제1포워드존과 연결되고, 상기 리버스존은 제2포워드존과 연결되도록 배치된 것을 특징으로 하는 압출장치.
- 제 8 항에 있어서,상기 스크류는, 축회전할 때 상기 제2포워드존에서 이송된 원료의 재압축이 이뤄지도록 나사산이 형성된 제1서브니딩존을 더 포함하는 것을 특징으로 하는 압출장치.
- 제 12 항에 있어서,상기 스크류는, 축회전할 때 상기 제1서브니딩존을 통과한 원료가 토출구쪽으로 이송되도록 나사산이 형성된 제3포워드존을 더 포함하고,상기 제3포워드존이 형성된 범위 내에서 상기 배럴에는 원료에서 분리된 기체를 배출하는 서브슬롯부가 형성된 것을 특징으로 하는 압출장치.
- 제 13 항에 있어서,상기 스크류는, 축회전할 때 상기 제3포워드존에서 이송된 원료의 재압축이 이뤄지도록 나사산이 형성된 제2서브니딩존을 더 포함하는 것을 특징으로 하는 압출장치.
- 제 14 항에 있어서,상기 스크류는, 축회전할 때 상기 제2서브니딩존을 통과한 원료가 토출구쪽으로 이송되도록 나사산이 형성된 제4포워드존을 더 포함하고,상기 제4포워드존이 형성된 범위 내에서 상기 배럴에는 원료에 함유된 불순물을 외부로 배출하는 서브벤트부가 형성된 것을 특징으로 하는 압출장치.
- 제 1 항 내지 제 15 항 중 어느 한 항에 있어서,상기 배럴의 토출구에서 배출된 원료를 분쇄하는 분쇄장치를 더 포함하는 것을 특징으로 하는 압출장치.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080013513.XA CN113423548A (zh) | 2019-11-25 | 2020-08-13 | 挤出机 |
| US17/428,602 US12304111B2 (en) | 2019-11-25 | 2020-08-13 | Extruder |
| EP20892275.7A EP3900909A4 (en) | 2019-11-25 | 2020-08-13 | EXTRUSION DEVICE |
| MYPI2021004814A MY209128A (en) | 2019-11-25 | 2020-08-13 | Extruder |
| JP2021543431A JP7233799B2 (ja) | 2019-11-25 | 2020-08-13 | 押出装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0152013 | 2019-11-25 | ||
| KR1020190152013A KR20210063644A (ko) | 2019-11-25 | 2019-11-25 | 압출장치 |
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| Publication Number | Publication Date |
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| WO2021107331A1 true WO2021107331A1 (ko) | 2021-06-03 |
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| PCT/KR2020/010739 Ceased WO2021107331A1 (ko) | 2019-11-25 | 2020-08-13 | 압출장치 |
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| Country | Link |
|---|---|
| US (1) | US12304111B2 (ko) |
| EP (1) | EP3900909A4 (ko) |
| JP (1) | JP7233799B2 (ko) |
| KR (2) | KR20210063644A (ko) |
| CN (1) | CN113423548A (ko) |
| MY (1) | MY209128A (ko) |
| WO (1) | WO2021107331A1 (ko) |
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| EP4411036A4 (en) * | 2021-09-30 | 2026-04-22 | Beijing Chonglee Machinery Eng Co Ltd | FIBER SPINNING, DRAWING AND WINDING APPARATUS AND COMBINED MACHINE FOR THE POLYLACTIC ACID INDUSTRY |
| KR102484744B1 (ko) * | 2022-03-28 | 2023-01-06 | 주식회사 신칸머신 | 동방향 회전 트윈 스크류를 구비한 플라스틱 컴파운드 제조용 압출장치 |
| CN115790029A (zh) * | 2022-12-08 | 2023-03-14 | 都江堰市江宁机械有限公司 | 一种筒体冷却装置 |
| CN117048016B (zh) * | 2023-10-11 | 2023-12-26 | 江苏奥瑞斯智能装备有限公司 | 一种塑料生产用挤出成型机 |
| CN119116329B (zh) * | 2024-11-13 | 2025-01-24 | 绵阳市盛宇新材料有限公司 | 一种用于复合材料的挤出装置 |
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2020
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- 2020-08-13 WO PCT/KR2020/010739 patent/WO2021107331A1/ko not_active Ceased
- 2020-08-13 MY MYPI2021004814A patent/MY209128A/en unknown
- 2020-08-13 US US17/428,602 patent/US12304111B2/en active Active
- 2020-08-13 CN CN202080013513.XA patent/CN113423548A/zh active Pending
- 2020-08-13 EP EP20892275.7A patent/EP3900909A4/en active Pending
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2023
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113423548A (zh) | 2021-09-21 |
| EP3900909A4 (en) | 2022-03-23 |
| MY209128A (en) | 2025-06-24 |
| KR102760493B1 (ko) | 2025-02-03 |
| KR20210063644A (ko) | 2021-06-02 |
| EP3900909A1 (en) | 2021-10-27 |
| US20220126481A1 (en) | 2022-04-28 |
| KR20230074675A (ko) | 2023-05-31 |
| US12304111B2 (en) | 2025-05-20 |
| JP7233799B2 (ja) | 2023-03-07 |
| JP2022518566A (ja) | 2022-03-15 |
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