WO2011158916A1 - 押出成形装置及びこれを用いた成形体の製造方法 - Google Patents
押出成形装置及びこれを用いた成形体の製造方法 Download PDFInfo
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- WO2011158916A1 WO2011158916A1 PCT/JP2011/063850 JP2011063850W WO2011158916A1 WO 2011158916 A1 WO2011158916 A1 WO 2011158916A1 JP 2011063850 W JP2011063850 W JP 2011063850W WO 2011158916 A1 WO2011158916 A1 WO 2011158916A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/206—Forcing the material through screens or slots
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
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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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
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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
- B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
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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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0089—Producing honeycomb structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B2003/203—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded for multi-channelled structures, e.g. honeycomb structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/22—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded by screw or worm
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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
- B29C48/03—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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-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
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
- B29C48/525—Conical 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
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
- B29C48/705—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows in the die zone, e.g. to create flow homogeneity
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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
Definitions
- the present invention relates to a manufacturing technique of a molded body, and more particularly to an extrusion molding apparatus for manufacturing a ceramic molded body and a manufacturing method of a molded body using the same.
- honeycomb filter structures have been widely known for DPF (Diesel particulate filter) and the like.
- This honeycomb filter structure has a structure in which one end side of some through holes of a honeycomb structure having a large number of through holes is sealed with a sealing material, and the other end side of the remaining through holes is sealed with a sealing material.
- Patent Documents 1 and 2 disclose a die and an extrusion molding apparatus used for manufacturing a honeycomb structure.
- a honeycomb filter structure for DPF is generally used in a state of being housed in a rigid case. If the dimensional accuracy of the honeycomb filter structure is low, problems such as cracks in the honeycomb filter structure due to thermal stress or the like are likely to occur. Therefore, high dimensional accuracy is required for the green molded body before firing. In addition, some honeycomb structures have a narrow cell pitch (for example, about 1.1 to 2.8 mm), and high dimensional accuracy is required for the thickness of partition walls that define a large number of through holes.
- the honeycomb structure When the honeycomb structure is manufactured by extrusion molding, it is desirable to reduce the pressure loss of the pasty raw material composition flowing in the extrusion molding apparatus as much as possible. If the pressure loss of the raw material composition is large, problems such as an increase in the load on the extrusion molding apparatus and wear of parts occur, and there is a restriction that the viscosity of the raw material composition must be set low. .
- the present invention has been made in view of the above problems, and an extrusion molding apparatus capable of sufficiently reducing pressure loss accompanying transfer of a paste-like raw material composition and capable of producing a molded body having sufficiently high dimensional accuracy, and It aims at providing the manufacturing method of the used molded object.
- the extrusion molding apparatus includes a flow path for transferring a paste-like raw material composition, a screw provided on the upstream side of the flow path, kneading the raw material composition and transferring it downstream, and a flow path A die provided on the downstream side from which a molded body made of the raw material composition is extruded, a resistance tube communicating the flow channel with the die, and a rectifying plate provided between the screw and the die are provided.
- the current plate has a plurality of through holes penetrating from the upstream surface to the downstream surface, and the opening of the through hole in the upstream surface has a larger opening area than the opening in the downstream surface.
- the opening on the upstream surface of the current plate is made larger in size (opening area) than the opening on the downstream surface, the pasty raw material composition passes through the through hole of the current plate. It becomes easy and the pressure loss in the current plate can be made sufficiently small. By reducing the pressure loss, the load on the extrusion molding apparatus can be reduced, and the wear of the current plate can be sufficiently suppressed.
- the rectifying plate may have a net-like resistor to enhance the rectifying effect.
- a molded article having excellent shape retention can be produced.
- the device according to the present invention has a configuration in which the opening of the through hole on the upstream surface of the current plate has a larger opening area than the opening on the downstream surface.
- the through hole of the rectifying plate may have a tapered portion with an opening area increasing from the downstream side toward the upstream side, or may have a counterbore hole (spot facing) on the upstream side. Good.
- the present invention provides a method for producing a molded body using the above extrusion molding apparatus. According to the method of the present invention, a molded article having excellent shape retention can be produced.
- the pressure in the extruded molded body and the flow path of the extrusion molding apparatus it is preferable to check the pressure in the extruded molded body and the flow path of the extrusion molding apparatus, and to replace the rectifying plate and / or change the viscosity of the raw material composition if any malfunction is found. For example, when the shape-retaining property of the extruded molded body is insufficient, the viscosity is increased by adjusting the composition of the raw material composition. In this case, it is preferable to replace the current plate if necessary. By adjusting the viscosity of the raw material composition and exchanging the current plate, it is possible to reduce the load on the extrusion molding apparatus and to continuously produce a molded body having sufficiently high dimensional accuracy over a long period of time.
- the pressure loss of the paste-like raw material composition can be sufficiently reduced, and a molded body with sufficiently high dimensional accuracy can be produced.
- FIG. (A) is a perspective view which shows an example of the green molded object for honeycomb structures
- (b) is the elements on larger scale of a green molded object.
- FIG. (A) is a top view which shows an example of a baffle plate
- FIG. (b) is a fragmentary sectional view which shows the one aspect
- a green molded body 70 shown in FIG. 1 is obtained by extruding a raw material composition.
- the green molded body 70 is a cylindrical body in which a large number of through holes 70a are arranged substantially in parallel.
- the cross-sectional shape of the through hole 70a is a square as shown in FIG.
- the plurality of through holes 70a are arranged in a square arrangement in the green molded body 70, that is, such that the central axis of the through hole 70a is located at the apex of the square.
- the square size of the cross section of the through hole 70a can be set to, for example, 0.8 to 2.5 mm on a side.
- a honeycomb structure is manufactured by firing the green molded body 70 at a predetermined temperature.
- the length of the green molded body 70 in the direction in which the through hole 70a extends is not particularly limited, but may be, for example, 40 to 350 mm. Further, the outer diameter of the green molded body 70 is not particularly limited, but may be, for example, 100 to 320 mm.
- the raw material composition forming the green molded body 70 is not particularly limited.
- an inorganic compound source powder that is a ceramic raw material, an organic binder such as methylcellulose, and necessary Additives added depending on From the viewpoint of high temperature resistance of the honeycomb structure, suitable ceramic materials include alumina, silica, mullite, cordierite, glass, oxides such as aluminum titanate, silicon carbide, silicon nitride, and the like.
- the aluminum titanate can further contain magnesium and / or silicon.
- the inorganic compound source powder when producing a green molded body of aluminum titanate, includes an aluminum source powder such as ⁇ -alumina powder and a titanium source powder such as anatase type or rutile type titania powder. Furthermore, magnesium source powders such as magnesia powder and magnesia spinel powder and / or silicon source powders such as silicon oxide powder and glass frit can be included.
- organic binder examples include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and lignin sulfonate.
- additives examples include pore formers, lubricants and plasticizers, dispersants, and solvents.
- pore-forming agents include carbon materials such as graphite; resins such as polyethylene, polypropylene, and polymethyl methacrylate; plant materials such as starch, nut shells, walnut shells, and corn; ice; and dry ice.
- Lubricants and plasticizers include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid; metal stearates such as Al stearate, polyoxyalkylene alkyl And ether (POAAE).
- alcohols such as glycerin
- higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid
- metal stearates such as Al stearate, polyoxyalkylene alkyl And ether (POAAE).
- dispersant examples include inorganic acids such as nitric acid, hydrochloric acid, and sulfuric acid; organic acids such as oxalic acid, citric acid, acetic acid, malic acid, and lactic acid; alcohols such as methanol, ethanol, and propanol; ammonium polycarboxylate; Surfactants such as oxyalkylene alkyl ethers are listed.
- solvent for example, alcohols such as methanol, ethanol, butanol and propanol; glycols such as propylene glycol, polypropylene glycol and ethylene glycol; and water can be used.
- the extrusion molding apparatus 10 shown in FIG. 2 is for producing a green molded body 70 from a powdery or paste-like raw material composition.
- the extrusion molding apparatus 10 includes a screw 2A provided at the upper stage in the housing 1 and a screw 2B provided at the lower stage.
- the screws 2A and 2B are for kneading the raw material composition supplied from the inlet 1a and transferring it downstream through the flow path 1b.
- a vacuum chamber 3 is provided between the screws 2A and 2B, and the raw material composition can be degassed by reducing the pressure in the vacuum chamber 3.
- the raw material composition in the vacuum chamber 3 is introduced into the lower screw 2B by a roller 3a.
- the extrusion molding apparatus 10 further includes a current plate 5 provided on the downstream side of the screw 2B, a die 8 from which a molded body 70A made of the raw material composition is extruded, and a resistance tube 9 that communicates the flow path 1b and the die 8.
- the resistance tube 9 has a tapered inner flow path, and the flow path cross-sectional area gradually decreases from the upstream side toward the downstream side.
- the resistance tube 9 may have an enlarged portion in which the flow path cross section increases from upstream to downstream.
- a support base 15 for supporting the molded body 70A is installed next to the extrusion molding apparatus 10 so that the molded body 70A extruded from the die 8 is not deformed.
- the life of the die 8 may be significantly shortened due to preferential wear of a portion of the die 8.
- the rectifying plate 5 is detachably provided on the housing 1 and is disposed between the screw 2B and the die 8.
- the rectifying plate 5 may have a net-like resistor (not shown) in order to enhance the effect of adjusting the flow rate.
- the mechanism which slides the baffle plate 5 includes a type using hydraulic pressure in addition to a type using a tool.
- the rectifying plate 5 is preferably a structure that hardly causes distortion even when pressure is applied from the upstream side.
- the material of the rectifying plate 5 is preferably carbon steel, for example.
- suitable materials other than carbon steel include special steels containing nickel, chromium, tungsten and the like.
- the thickness of the current plate 5 is preferably 10 to 100 mm from the viewpoint of ensuring sufficient strength.
- FIG. 4A is a front view showing the rectifying plate 5, and FIG. 4B is a partial cross-sectional view showing the configuration of the through hole 6 of the rectifying plate 5.
- the rectifying plate 5 has a plurality of through holes 6 that penetrate from the upstream surface F ⁇ b> 1 to the downstream surface F ⁇ b> 2.
- the through-hole 6 has a tapered portion 6b whose inner diameter decreases from the upstream opening 6a toward the downstream side, and has a straight pipe portion 6c on the downstream side. Thereby, the opening area of the upstream opening 6a of the through-hole 6 is larger than the opening area of the downstream opening 6d.
- the upstream opening 6a of the through hole 6 preferably has a diameter of 3 to 12 mm.
- the downstream opening 6d of the through hole 6 preferably has a diameter of 1 to 10 mm.
- the opening ratio of the upstream face F1 of the rectifying plate 5 is preferably 60 to 100%, more preferably 98% or less, and still more preferably 95% or less.
- the aperture ratio of the downstream face F2 of the current plate 5 is preferably 50 to 80%.
- the “aperture ratio” is obtained by dividing the total area of the openings on one surface (surface F1 or surface F2) of the current plate 5 by the area of the one surface (excluding the peripheral portion covered by the housing). Means a calculated value.
- the raw material composition is introduced into the flow path 1b from the inlet 1a.
- the raw material composition is kneaded and transferred downstream.
- the kneaded material is passed through the through holes 6 of the current plate 5 to make the flow velocity distribution uniform, and then introduced into the die 8 through the resistance tube 9.
- the linear velocity of the raw material composition on the downstream side of the die 8 can be about 10 to 150 cm / min.
- the raw material composition with a uniform flow velocity distribution is extruded from the die 8 and the compact 70A is collected on the support base 15.
- the green molded body 70 is obtained by cutting the molded body 70A into a predetermined length.
- the shape retention of the molded body is insufficient, it is preferable to supply a raw material composition having a high viscosity to the extrusion molding apparatus 10. Thereby, the shape retention property of a molded object can be improved.
- the viscosity of the raw material composition is increased and the pressure loss of the raw material composition in the extrusion molding apparatus 10 becomes too high, it is preferable to replace the current plate 5.
- the load on the extrusion molding apparatus 10 can be reduced by replacing the current plate with a suitable opening ratio.
- the following steps may be performed when a defect that is considered to be caused by non-uniformity in the flow rate distribution of the raw material composition is recognized.
- the flow rate is adjusted by removing the rectifying plate 5 from the housing 1 and attaching a pin (not shown) to one or more through holes 6 to close the through holes 6.
- a pin not shown
- the green molded body 70 with sufficiently high dimensional accuracy can be continuously manufactured over a long period of time without changing or changing the setting of the die 8.
- the supply of the raw material composition to the extrusion molding apparatus may be temporarily stopped or may be performed without stopping.
- the pressure loss of the raw material composition in the rectifying plate 5 can be sufficiently reduced by providing the rectifying plate 5 with the through hole 6 having the above-described aspect.
- the load on the extrusion molding apparatus 10 can be reduced, and the wear of the rectifying plate 5 can be sufficiently suppressed.
- the present embodiment even if a raw material composition having a relatively high viscosity is used, an excessive increase in pressure loss can be prevented, so that a raw material having a viscosity suitable for obtaining a molded article having high shape retention.
- a composition can be used.
- FIG. 5A is a partial front view showing a current plate in which a through-hole 7 having a counterbore is formed
- FIG. 5B is a partial cross-sectional view showing a configuration of the through-hole 7. As shown in FIG.
- the through-hole 7 has a rectangular upstream opening 7 a, a counterbore hole 7 b, a straight pipe portion 7 c having a substantially circular cross section, and a substantially circular downstream opening 7 d.
- the shape of the counterbore hole 7b is not limited to a rectangle, and may be a circle, an ellipse, or a polygon.
- the size (opening area) of the upstream opening 6a was set larger than the size (opening area) of the downstream opening 6d about all the through-holes 6 which the baffle plate 5 has, it illustrated.
- the through hole 6 having such a configuration and a straight tubular through hole may be used in combination.
- the raw material composition flowing in the vicinity of the inner wall surface of the flow path has a low flow velocity, while the raw material composition flowing in the center of the flow path has a high flow velocity.
- a straight tubular through hole may be provided, and a through hole having a tapered portion 6b or a counterbore hole 7b may be provided in the peripheral region of the rectifying plate 5.
- a straight tubular through hole or a through hole having a tapered portion 6b or a counterbore hole 7b is provided in the rectifying plate so as to be unevenly distributed within a predetermined center angle range. May be.
- the pressure loss of the paste-like raw material composition can be sufficiently reduced, and a molded body with sufficiently high dimensional accuracy can be produced.
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- Manufacturing & Machinery (AREA)
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- Press-Shaping Or Shaping Using Conveyers (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
図1に示すグリーン成形体70は、原料組成物を押出成形することによって得られたものである。図1の(a)に示すように、グリーン成形体70は多数の貫通孔70aが略平行に配置された円柱体である。貫通孔70aの断面形状は、図1の(b)に示すように正方形である。これらの複数の貫通孔70aは、グリーン成形体70において、端面から見て、正方形配置、すなわち、貫通孔70aの中心軸が、正方形の頂点にそれぞれ位置するように配置されている。貫通孔70aの断面の正方形のサイズは、例えば、一辺0.8~2.5mmとすることができる。なお、グリーン成形体70を所定の温度で焼成することによってハニカム構造体が製造される。
図2~4を参照しながら、本発明に係る押出成形装置の実施形態について説明する。図2に示す押出成形装置10は、粉末状又はペースト状の原料組成物からグリーン成形体70を製造するためのものである。
次に、押出成形装置10を用いてグリーン成形体70を製造する方法について説明する。まず、原料組成物を入口1aから流路1b内に導入する。スクリュー2A,2B及びローラ3aを作動させることによって原料組成物を混練すると共に下流側に移送する。混練物を整流板5の貫通孔6を通過させて流速分布を均一化させた後、抵抗管9を通じてダイ8に導入する。ダイ8の下流側における原料組成物の線速度は10~150cm/分程度とすることができる。
Claims (6)
- ペースト状の原料組成物を移送する流路と、
前記流路の上流側に設けられ、前記原料組成物を混練すると共に下流側へと移送するスクリューと、
前記流路の下流側に設けられ、前記原料組成物からなる成形体が押し出されるダイと、
前記流路と前記ダイを連通する抵抗管と、
前記スクリューと前記ダイの間に設けられた整流板と、
を備え、
前記整流板は、上流側の面から下流側の面にかけて貫通する複数の貫通孔を有し、上流側の面における前記貫通孔の開口は下流側の面における開口よりも開口面積が大きい、押出成形装置。 - 前記貫通孔は、下流側から上流側に向けて開口面積が大きくなるテーパ部を有する、請求項1に記載の装置。
- 前記貫通孔は、上流側にザグリ穴を有する、請求項1に記載の装置。
- 請求項1~3のいずれか一項に記載の押出成形装置を用いた成形体の製造方法。
- 前記押出成形装置の整流板を交換する工程を備える、請求項4に記載の方法。
- 前記原料組成物の粘度を変更する工程を備える、請求項4又は5に記載の方法。
Priority Applications (5)
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MX2012014260A MX338500B (es) | 2010-06-17 | 2011-06-16 | Dispositivo de moldeo por extrusion y metodo para producir un cuerpo moldeado utilizando el mismo. |
US13/703,443 US9375890B2 (en) | 2010-06-17 | 2011-06-16 | Extrusion-molding device and method for producing molded body using same |
CN2011800298250A CN102933359A (zh) | 2010-06-17 | 2011-06-16 | 挤出成型装置和使用该挤出成形装置的成形体的制造方法 |
EP11795818.1A EP2583803A4 (en) | 2010-06-17 | 2011-06-16 | EXTRUSION FORMING DEVICE AND METHOD FOR PRODUCING A FORM BODY THEREWITH |
KR1020127030247A KR20130092416A (ko) | 2010-06-17 | 2011-06-16 | 압출 성형 장치 및 이것을 사용한 성형체의 제조 방법 |
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JP2010-138351 | 2010-06-17 | ||
JP2010138351 | 2010-06-17 |
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EP (1) | EP2583803A4 (ja) |
JP (1) | JP5771074B2 (ja) |
KR (1) | KR20130092416A (ja) |
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WO2012147935A1 (ja) * | 2011-04-28 | 2012-11-01 | 住友化学株式会社 | 押出成形装置及びこれを用いたグリーンハニカム成形体の製造方法 |
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JP6901246B2 (ja) | 2016-08-03 | 2021-07-14 | 富士通コンポーネント株式会社 | プリンタ |
KR102280080B1 (ko) * | 2016-12-27 | 2021-07-23 | 에스에이치피피 글로벌 테크놀러지스 비.브이. | 특성 향상을 위한 새로운 다이 디자인 |
JP6965576B2 (ja) * | 2017-05-25 | 2021-11-10 | 株式会社デンソー | 流速制御板 |
DE112019003467T5 (de) * | 2019-04-10 | 2021-05-06 | Ngk Insulators, Ltd. | Strangpressmaschine und Verfahren zur Herstellung eines Formkörpers |
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- 2011-06-16 WO PCT/JP2011/063850 patent/WO2011158916A1/ja active Application Filing
- 2011-06-16 US US13/703,443 patent/US9375890B2/en not_active Expired - Fee Related
- 2011-06-16 JP JP2011134540A patent/JP5771074B2/ja not_active Expired - Fee Related
- 2011-06-16 EP EP11795818.1A patent/EP2583803A4/en not_active Withdrawn
- 2011-06-16 KR KR1020127030247A patent/KR20130092416A/ko not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
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EP2583803A4 (en) | 2014-02-19 |
US20130099412A1 (en) | 2013-04-25 |
MX2012014260A (es) | 2013-01-24 |
JP5771074B2 (ja) | 2015-08-26 |
CN102933359A (zh) | 2013-02-13 |
EP2583803A1 (en) | 2013-04-24 |
KR20130092416A (ko) | 2013-08-20 |
MX338500B (es) | 2016-04-20 |
JP2012020577A (ja) | 2012-02-02 |
US9375890B2 (en) | 2016-06-28 |
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