JP5711546B2 - Green molded body cutting apparatus and green molded body manufacturing system provided with the same - Google Patents

Description

  The present invention relates to a cutting apparatus for cutting a green molded body that is extruded in a lateral direction from a die included in an extrusion molding apparatus into a predetermined length, and a green molded body manufacturing system including the same.

  Conventionally, honeycomb filter structures are 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 green honeycomb molded body. Patent Document 3 discloses a method for cutting a green honeycomb molded body.

JP 61-5915 A Japanese Patent No. 4099896 JP 2001-96524 A

  By the way, when the green molded body is extruded in the lateral direction from the die of the extrusion molding apparatus, the tip is bent downward by gravity as the extruded green molded body becomes longer. When a cutting device in which a cutter such as a wire moves downward from above is used to cut the green molded body to a predetermined length, force is applied downward from the cutter to the green molded body. In order to prevent deformation of the green molded body due to gravity or a wire, it is necessary to support the tip of the green molded body with a holding member made of sponge or the like.

  However, normally, due to structural limitations of the extrusion molding device and the cutting device, these devices cannot be placed sufficiently close to each other, and the green molded body is supported by the holding member from the position of the die of the extrusion molding device. Up to 500-600 mm may be required. In this case, although depending on the strength of the green molded body, it tends to bend downward until the tip of the green molded body reaches the position of the holding member. Further, even when the tip portion is supported by the holding member, the green molded body may bend downward between the die and the holding member.

  When the portion bent below the green molded body moves rearward along with extrusion molding and the holding member comes into contact with the portion, the green molded body is pushed upward by the holding member and the base end portion of the green molded body ( Wrinkles may occur near the die exit. The deformation of the green molded body causes cracks in the process of firing the green molded body to obtain a fired body.

  In addition, when the cutter is raised after the cutter is lowered and the green molded body is cut, the cutter may come into contact with the green molded body, and this contact causes the green molded body to be deformed or defective. Cheap.

  The present invention has been made in view of the above problems, and can sufficiently suppress deformation and defects of a green molded body extruded from an extrusion molding apparatus and a molded body obtained by cutting the green molded body into a predetermined length, and dimensional accuracy. An object of the present invention is to provide a cutting apparatus capable of obtaining a green molded body having a high height and a green molded body manufacturing system provided with the same.

  A cutting apparatus according to the present invention is for cutting a green molded body that is extruded from a die of an extrusion molding apparatus and extends in a lateral direction, and a holding member having a recess corresponding to the shape of the side surface of the green molded body; A driving means for moving the holding member upward to bring the concave portion of the holding member into contact with the side surface of the green molded body, and when the cutting device is arranged at the subsequent stage of the extrusion molding apparatus, the driving means is provided between the die and the driving means. A gas injection surface having a plurality of openings for injecting gas upward, a gas supply means for supplying gas to the plurality of openings, and a green molded body at a position near the holding member and on the die side. A cutter for cutting, and a separation mechanism having a slide surface that slides a holding member on which the cut green molded body is placed and separates it from the green molded body that extends from the die.

  According to the cutting apparatus, upward gas can be injected from the gas injection surface toward the green molded body in a state where the tip portion is not supported by the holding member. Thereby, it is possible to sufficiently prevent the green molded body from being bent downward due to gravity until the green molded body reaches the position of the holding member. Also, after lowering the cutter and cutting the green molded body, by sliding the holding member on which the cut green molded body is placed, the cutter comes into contact with the green molded body when the cutter is raised. It can be suppressed sufficiently. In addition, if the apparatus of the following process (for example, drying process etc.) is arrange | positioned at the end point of a slide surface, the deformation | transformation at the time of transfer of a green molded object can fully be suppressed.

  The slide surface of the separation mechanism may have a portion inclined so as to become lower in the direction away from the die, or have a plurality of openings for injecting gas upward. It may be.

Further, the separation mechanism of the cutting device, that further having a gas injection port for injecting a gas in a direction away from the die toward a holding member for holding cut green body and / or the same. By providing such a gas injection port in the separation mechanism, sliding of the holding member can be started at a desired timing.

  The present invention provides a green molded body manufacturing system including an extrusion molding apparatus having a die for extruding a green molded body in a lateral direction and the cutting device.

  ADVANTAGE OF THE INVENTION According to this invention, the green molded object extruded from the extrusion molding apparatus and the deformation | transformation and defect of a molded object which cut this to predetermined length can fully be suppressed, and a green molded object with high dimensional accuracy is obtained. .

(A) is a perspective view which shows an example of a green honeycomb molded object, (b) is the elements on larger scale of a green honeycomb molded object. It is a schematic sectional drawing which shows one Embodiment of the green molded object manufacturing system which concerns on this invention. It is a fragmentary sectional view which shows typically the internal structure of an extrusion molding apparatus. It is a perspective view which shows an example of a holding member. It is a perspective view which shows the structure of a gas injection plate typically. It is a perspective view which shows typically an example of a structure of a cutting | disconnection mechanism. It is a perspective view showing typically an example of composition of a separation mechanism.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. First, prior to description of the green molded body manufacturing system according to the present invention, a green molded body for a honeycomb structure will be described.

<Green molded body>
A green honeycomb molded body (green molded body) 70 shown in FIG. 1 is obtained by cutting a green honeycomb molded body 70A extruded by the extrusion molding apparatus 10 into a predetermined length (see FIG. 2). As shown in FIG. 1 (a), the green honeycomb 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 honeycomb 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 0.8 to 2.5 mm on a side, for example. In addition, a honeycomb structure is manufactured by firing the green honeycomb molded body 70 at a predetermined temperature.

  The length of the green honeycomb 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 honeycomb molded body 70 is not particularly limited, but can be set to 100 to 320 mm, for example. The partition wall thickness, which is the distance between the through holes 70a, can be 0.05 to 0.5 mm.

  The material of the green honeycomb molded body 70 is not particularly limited, but can be green (ceramic raw material) that becomes ceramic by firing later. Examples of ceramics include alumina, silica, mullite, cordierite, glass, oxides such as aluminum titanate, silicon carbide, silicon nitride, and metal. The aluminum titanate can further contain magnesium and / or silicon.

  Specifically, the green honeycomb molded body 70 can include an inorganic compound source powder that is a ceramic raw material, an organic binder such as methylcellulose, and an additive that is added as necessary.

  For example, in the case of a green molded body of aluminum titanate, the inorganic compound source powder includes an aluminum source powder such as α-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.

  Examples of the organic binder include celluloses such as methylcellulose, carboxymethylcellulose, hydroxyalkylmethylcellulose, and sodium carboxymethylcellulose; alcohols such as polyvinyl alcohol; and lignin sulfonate. The amount of the organic binder is preferably 20 parts by weight or less, more preferably 15 parts by weight or less, and still more preferably 6 parts by weight or less with respect to 100 parts by weight of the inorganic compound source powder. Moreover, it is preferable that the minimum amount of an organic binder is 0.1 weight part, More preferably, it is 3 weight part.

  Examples of the additive include a pore-forming agent, a lubricant, a plasticizer, a dispersant, and a solvent.

  Examples of the pore-forming agent 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. The amount of pore-forming agent added is preferably 0 to 40 parts by weight, more preferably 0 to 25 parts by weight with respect to 100 parts by weight of the inorganic compound source powder.

  Examples of the lubricant include alcohols such as glycerin; higher fatty acids such as caprylic acid, lauric acid, palmitic acid, arachidic acid, oleic acid and stearic acid; and stearic acid metal salts such as Al stearate. The addition amount of the lubricant is preferably 0 to 10 parts by weight, more preferably 1 to 5 parts by weight with respect to 100 parts by weight of the inorganic compound source powder.

  As a plasticizer, polyoxyalkylene alkyl ether is mentioned, for example. Examples of commercially available products include “Unilube 50MB-72” manufactured by NOF Corporation (polyoxyethylene polyoxypropylene butyl ether, viscosity at 20 ° C. of 1020 mPa · s), “UNILUBE 50MB-168” manufactured by NOF Corporation (poly Oxyethylene polyoxypropylene butyl ether and a viscosity at 20 ° C. of 2880 mPa · s). The amount of the plasticizer is preferably 0.1 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, and still more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the inorganic compound source powder. 1 to 6 parts by weight.

  Examples of the dispersant 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 Surfactant etc. are mentioned. It is preferable that the addition amount of a dispersing agent is 0-20 weight part with respect to 100 weight part of an inorganic compound source powder, More preferably, it is 2-8 weight part.

  As the 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. Of these, water is preferable, and ion-exchanged water is more preferably used from the viewpoint of few impurities. The amount of the solvent used is preferably 10 to 100 parts by weight, more preferably 20 to 80 parts by weight with respect to 100 parts by weight of the inorganic compound source powder.

<Green molded body production system>
An embodiment of a green molded body manufacturing system according to the present invention will be described with reference to FIGS. A green molded body manufacturing system 100 shown in FIG. 2 is for manufacturing a green honeycomb molded body 70 from a powdery or pasty raw material composition. The green molded body manufacturing system 100 obtains a green honeycomb molded body 70 by cutting into a predetermined length while supporting the extrusion molding apparatus 10 and the green honeycomb molded body 70A extruded in the horizontal direction from the extrusion molding apparatus 10. A cutting device 60.

(Extrusion molding equipment)
As shown in FIG. 2, the extrusion molding apparatus 10 includes a screw 2 </ b> A provided at the upper stage in the housing 1 and a screw 2 </ b> B 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.

  As shown in FIG. 3, the extrusion molding apparatus 10 includes a flow rate adjusting plate 5 provided on the downstream side of the screw 2B as necessary, a die 8 from which a green honeycomb molded body 70A made of a raw material composition is extruded, and a flow path 1b. And a resistance tube 9 communicating with 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. Note that, in the case of manufacturing the green honeycomb molded body 70A having a diameter larger than the diameter of the screw 2B, the resistance tube 9 may have an enlarged portion in which the channel cross section increases from upstream to downstream. .

  The flow rate adjusting plate 5 is for making the flow velocity distribution uniform before introducing the raw material composition into the die 8. The flow rate adjusting plate 5 is detachably provided on the housing 1 and is disposed between the screw 2 </ b> B and the die 8. The flow rate adjusting plate 5 is fixed to the housing 1 by tightening the flanges 1c and 1d with bolts and nuts. The flow rate adjusting plate 5 may have a net-like resistor (not shown) in order to enhance the effect of flow rate adjustment.

  The flow rate adjusting plate 5 has a plurality of through holes 5a having a diameter of 1 to 10 mm that penetrate in the thickness direction. The flow rate adjusting plate 5 is preferably a structure that hardly causes distortion even when pressure is received from the upstream side. From this viewpoint, the material of the flow rate adjusting plate 5 is preferably, for example, carbon steel. Examples of suitable materials other than carbon steel include special steels containing nickel, chromium, tungsten and the like. The thickness of the flow rate adjusting plate 5 is preferably 10 to 100 mm from the viewpoint of ensuring sufficient strength.

  The die 8 is for producing a molded body having the shape shown in FIG. 1 from the raw material composition, and has a grid-like flow path (not shown) corresponding thereto. By passing the raw material composition through the die 8, a green honeycomb molded body 70 </ b> A having a large number of through holes 70 a having a square channel cross section and an outer peripheral skin covering the side surface is formed.

(Cutting device)
The cutting device 60 is disposed at the subsequent stage of the extrusion molding device 10, and is for cutting the green honeycomb molded body 70A to obtain a green honeycomb molded body 70 having a predetermined length. The cutting device 60 includes a support mechanism 30 that supports the green honeycomb molded body 70A extruded in the horizontal direction from the die 8, a cutting mechanism 40 for cutting the green honeycomb molded body 70A, and the cut green honeycomb molded body 70. Is provided with a separation mechanism 50 having a slide surface 52 that slides away from the green honeycomb molded body 70 </ b> A extending from the die 8.

  The support mechanism 30 is for preventing the green honeycomb molded body 70A from being deformed by gravity or a wire W. The support mechanism 30 has a plurality of holding members 31A and 31B having recesses 31a, a movable plate (driving means) 33 that repeats the operation of moving the holding members 31A and 31B one by one upward, and a green honeycomb molded body 70A. A gas injection plate 35 for injecting air upward, and a compressor (gas supply means) 37 for supplying compressed air to the gas injection plate 35 (see FIGS. 2, 4 and 5).

  As shown in FIG. 4, the holding member 31 </ b> A includes a main body 31 b made of sponge and a bottom 31 c made of resin (for example, vinyl chloride). A concave portion 31a corresponding to the shape of the side surface of the green honeycomb molded body 70A is formed in the sponge main body portion 31b. In the present embodiment, since the green honeycomb molded body 70A has a cylindrical shape, the recess 31a has a semicircular cross-sectional shape. The holding member 31B has the same configuration as the holding member 31A.

  The movable plate 33 is for bringing the concave portions 31a of the holding members (31A, 31B) into contact with the side surfaces of the green honeycomb molded body 70A. FIG. 2 shows a state where the movable plate 33 on which the holding member 31B is placed is raised. Even if the movable plate 33 is automatically raised by a sensor or the like when the tip of the green honeycomb molded body 70A pushed out from the die 8 and the holding member reach a predetermined position. Alternatively, it may be one in which an operator confirms it visually and manually operates it. The movable plate 33 is set to stop at a predetermined height after moving upward. That is, the movable plate 33 is set to stop at a height at which the height of the die 8 and the height of the concave portion 31a of the holding member on the movable plate 33 coincide.

  The upper surface of the gas injection plate 35 forms a gas injection surface 35 a and extends from the position of the die 8 of the extrusion molding apparatus 10 to the position of the movable plate 33. The gas injection plate 35 is disposed below the green honeycomb molded body 70A, and the gas injection surface 35a is separated from the side surface of the green honeycomb molded body 70A by 0.1 to 10 mm. As shown in FIG. 5, the gas injection surface 35a has a plurality of openings 35b, and air can be injected from these openings 35b toward the green honeycomb molded body 70A. The gas injection surface 35a is preferably curved so as to surround the side surface of the green honeycomb molded body 70A, and the cross section perpendicular to the extrusion direction is more preferably semicircular as shown in FIG.

  The diameter of the opening 35b is preferably 0.1 to 10 mm, although it depends on the size and specific gravity of the green honeycomb molded body 70A. The plurality of openings 35b may all have the same diameter, or may be provided such that the diameter gradually increases as the distance from the die 8 in the extrusion direction increases. By making the diameter of the opening 35b at a position away from the die 8 larger than the diameter of the opening 35b at a position close to the die 8, a sufficient upward force is given by air to the tip of the green honeycomb molded body 70A. And the deflection of the green honeycomb molded body 70A due to gravity can be more sufficiently suppressed.

  The compressor 37 is for supplying compressed air to the plurality of openings 35b. In addition, in order to prevent the green honeycomb molded body 70A from being dried by air injection, wet air may be injected from the plurality of openings 35b.

  The support mechanism 30 preferably further includes a gas injection amount control unit that adjusts the gas injection amount from the gas injection plate 35 in accordance with the magnitude of the force applied from the wire W to the green honeycomb molded body 70A. By continuing the gas injection while adjusting the gas injection amount while the green honeycomb molded body 70A is being cut, it is possible to sufficiently prevent the green honeycomb molded body 70A from being bent at the time of cutting.

  The cutting mechanism 40 is for cutting the green honeycomb molded body 70A supported by the holding members 31A and 31B to obtain the green honeycomb molded body 70 having a predetermined length. As shown in FIG. 6, the cutting mechanism 40 has a wire W as a cutter, and can hold the wire W in a state of being stretched in a horizontal direction and a direction perpendicular to the extrusion direction (X direction). Yes.

  The cutting mechanism 40 is configured so that the wire W descends between the holding members 31A and 31B and the green honeycomb molded body 70A can be cut. Further, the wire W can move in the extrusion direction (Y direction) in synchronization with the extrusion speed of the green honeycomb molded body 70A simultaneously with the lowering. The holding member 31B on the extrusion molding apparatus 10 side is located on the movable plate 33 described above, and the holding member 31A behind the holding member 31B is located on a base end portion 52b (horizontal plane) of a slide surface 52 described later ( (See FIG. 7).

  The cutting mechanism 40 includes a frame plate 42 having an inverted U shape. The frame plate 42 has two tip portions 42a and 42b that are spaced apart in the horizontal direction and extend downward. The front end portion 42a is provided with a feeding servo motor 43a, and the front end portion 42b is provided with a receiving side servo motor 43b.

  A feed-side bobbin 44 a is provided on the rotating shaft of the feed-side servo motor 43 a, and a receive-side bobbin 44 b is provided on the rotating shaft of the receive-side servo motor 43 b via a tension sensor 45. And the wire W is stretched over from the sending side bobbin 44a to the receiving side bobbin 44b. Although the material of the wire W is not specifically limited, For example, a steel wire etc. are mentioned. The diameter of the wire W becomes like this. Preferably it is 1000 micrometers or less, More preferably, it is 120-500 micrometers.

  The feed servo motor 43a, the receiving servo motor 43b, and the tension sensor 45 are connected to a tension controller 46. Based on the tension acquired from the tension sensor 45, the tension controller 46 controls the rotation of the feed-side bobbin 44a and the receiving-side bobbin 44b so that the tension of the wire W is within a predetermined range, while the wire W is predetermined. The two motors are controlled so as to move in the X direction from the sending side bobbin 44a toward the receiving side bobbin 44b at a speed of. The tension is not particularly limited, but is preferably 20 N or more, and preferably 40 N or more, for example. Moreover, although there is no upper limit of tension | tensile_strength, it is preferable to set it as 100 N or less, and it is more preferable to set it as 60 N or less. Also, the moving speed of the wire W in the X direction is not particularly limited, but can be 20 to 200 mm / s.

  In the present embodiment, the wire W is held by the frame plate 42, the feeding servo motor 43a, the receiving servo motor 43b, the feeding bobbin 44a, and the receiving bobbin 44b. In the present embodiment, the wire W can be moved in the X direction (arrow A) by the feed-side bobbin 44a, the receive-side bobbin 44b, the feed-side servo motor 43a, and the receive-side servo motor 43b. Furthermore, in this embodiment, the tension of the wire W can be kept constant by the tension sensor 45 and the tension controller 46.

  By moving the support portion 42c provided on the frame plate 42 in the vertical direction (Z-axis direction), the wire W is moved in the B direction (−Z direction) perpendicular to the A direction (X direction) in which the wire extends. Move. The mechanism for moving the wire W in the vertical direction is not particularly limited, and for example, a rack and pinion mechanism or the like can be used. The moving speed of the support portion 42c at the time of cutting, that is, the wire W in the -Z-axis direction is not particularly limited, but may be, for example, 20 to 200 mm / s.

  The separation mechanism 50 is used for sliding the holding member (the holding member 31A in FIG. 2) on which the cut green honeycomb molded body 70 is placed to separate the green honeycomb molded body 70 from the green honeycomb molded body 70A extending from the die 8. It is. As shown in FIG. 7, the separation mechanism 50 has a slide surface 52 on which the holding member can slide, and the slide surface 52 has an inclined portion 52 a inclined so as to become lower in the direction away from the die 8. In addition, the base end part 52b and the front-end | tip part 52c of the slide surface 52 are horizontal surfaces. Side walls 52d are provided on both sides of the slide surface 52 to prevent the holding member from rotating.

  From the viewpoint of reducing the friction between the bottom surface of the holding member and the slide surface 52, the slide surface 52 preferably has a plurality of openings 53 and can be configured to inject gas upward from these openings 53. By injecting the gas upward from the opening 53 of the slide surface 52, the holding member on which the green honeycomb molded body 70 is placed can be smoothly slid in a slightly lifted state. The gas may be air, and compressed air from the compressor 37 or a separately provided compressor may be used. Note that the configuration in which the friction between the bottom surface of the holding member and the slide surface 52 can be sufficiently reduced is not limited to the configuration in which the gas is injected. For example, a plurality of cylindrical rollers are perpendicular to the extrusion direction. A configuration may be adopted in which the holding member is slid by rotating in a direction and rotating these rollers.

  In order to start the slide of the holding member in the pushing direction at a desired timing, it is preferable to use the injection of compressed gas. The separation mechanism 50 shown in FIG. 7 has a gas injection port 55 that injects gas in a direction away from the die 8 toward the green honeycomb molded body 70 and / or the holding member 31A that holds the green honeycomb molded body 70. Examples of the gas include air and wet air, and compressed air from the compressor 37 may be used.

  Note that the method of starting the sliding of the holding member is not limited to gas injection, and the holding member may be pushed backward with a rod or the like, for example. Further, when the separation mechanism 50 has means for starting the sliding of the holding member as described above, the slide surface 52 does not necessarily have the inclined portion 52a, and the whole may be a horizontal plane.

<Method for producing green molded body>
The green molded body manufacturing method according to the present embodiment includes a step of supplying a raw material to the inlet 1a of the extrusion molding apparatus 10, a step of extruding the green honeycomb molded body 70A in a horizontal direction from the die 8 of the extrusion molding apparatus 10, The step of injecting air (or wet air) from the opening 35b of the gas injection plate 35 onto the green honeycomb molded body 70A pushed out from the die 8, and the first holding member 31A is moved upward by the movable plate 33. The step of bringing the concave portion 31a into contact with the side surface of the green honeycomb molded body 70A, and the green honeycomb molded body 70A are continuously extruded from the die 8, and then the second holding member 31B is moved upward by the movable plate 33. The step of bringing the concave portion 31a into contact with the side surface of the green honeycomb molded body 70A is separated from the horizontal direction. The step of cutting the green honeycomb molded body 70A with the wire W at a position between the holding members 31A and 31B that support the green molded body in place, and the green honeycomb molded body 70A from the green honeycomb molded body 70A by sliding the holding member 31A And a separating step.

  According to the green molded body manufacturing system 100 according to the above embodiment, air (or wet air) can be sprayed upward from the gas injection plate 35 of the support device 30 toward the green honeycomb molded body 70A. By injecting air toward the green honeycomb molded body 70A from below, the green honeycomb molded body 70A is sufficiently bent downward by gravity until the tip of the green honeycomb molded body 70A reaches the position of the holding member. Can be prevented. According to the above manufacturing method using the green molded body manufacturing system 100, the deflection of the green honeycomb molded body 70A extruded in the horizontal direction from the die 8 can be sufficiently suppressed, and the green honeycomb molded body 70A can be extruded in the vertical direction. By cutting with a wire W in a direction perpendicular to the direction, a green honeycomb molded body 70 in which the parallelism of both end faces is sufficiently high can be obtained efficiently.

  Further, according to the above embodiment, the wire W is lowered to cut the green honeycomb molded body 70A, and then the holding member on which the green honeycomb molded body 70 is placed is slid to raise the wire W. Can sufficiently suppress problems such as contact with the green honeycomb molded bodies 70 and 70A, and the green honeycomb molded body 70 with high dimensional accuracy can be continuously manufactured.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the case where the green honeycomb molded body 70 having the plurality of through holes 70a is manufactured has been illustrated. However, if the extrusion direction is the lateral direction, there is a possibility of deformation due to gravity. You may apply this invention to manufacture of the green molded object which does not have a through-hole.

  In the above-described embodiment, the case where the extrusion direction is the horizontal direction has been illustrated. However, the extrusion direction is not necessarily the horizontal direction, and the extrusion direction may be slightly inclined (about ± 5 °) from the horizontal direction.

  The configurations of the driving means for moving the holding members 31A and 31B upward and the gas supply means for supplying the injection gas to the opening 35b of the gas injection plate 35 are not limited to the above-described embodiment, but various forms. Can be taken. Note that the propellant gas is not limited to air or wet air.

  Further, the arrangement of the through holes 70a of the green honeycomb molded body is not particularly limited. For example, a staggered arrangement may be used instead of the square arrangement. The cross-sectional shape of the through-hole 70a is not limited to a square, but is any polygon such as a rectangle, a hexagon, or a triangle (including a regular hexagon, a regular polygon such as a regular triangle), a circle, an ellipse, etc. It doesn't matter in the form. The external shape of the green honeycomb molded body 70 is not limited to a cylindrical body, and may be a square column such as a square or a rectangle.

  DESCRIPTION OF SYMBOLS 8 ... Die, 10 ... Extrusion molding apparatus, 30 ... Support mechanism, 31 ... Holding member, 31a ... Recessed part, 33 ... Movable plate (drive means), 35a ... Gas injection surface, 35b ... Opening, 37 ... Compressor (gas supply means) 40 ... cutting mechanism, 50 ... separation mechanism, 52 ... slide surface, 52a ... inclined portion, 53 ... opening, 55 ... gas injection port, 60 ... cutting device, 70 ... cut green honeycomb molded body, 70A ... green Honeycomb molded body, 100 ... green molded body manufacturing system, W ... wire (cutter).

Claims (4)

A cutting device for cutting a green molded body that is extruded from a die of an extrusion molding device and extends in the lateral direction,
A holding member having a recess according to the shape of the side surface of the green molded body;
Driving means for moving the holding member upward to bring the concave portion into contact with a side surface of the green molded body;
A gas injection surface provided between the die and the driving means, and having a plurality of openings for injecting gas upward, when the cutting device is disposed at a subsequent stage of the extrusion molding device;
Gas supply means for supplying gas to the plurality of openings;
A cutter that cuts the green molded body in the vicinity of the holding member and on the die side;
Slide the holding member carrying the cut green molded body and slide it away from the green molded body extending from the die , and cut the green molded body and / or from the die toward the holding member holding the green molded body. A separation mechanism having a gas injection port for injecting a gas in a direction of moving away ;
A cutting device comprising:   The cutting device according to claim 1, wherein the slide surface has a portion inclined so as to become lower in a direction away from the die.   The cutting device according to claim 1 or 2, wherein the slide surface has a plurality of openings for injecting gas upward. An extrusion molding apparatus having a die for extruding a green molded body in a lateral direction;
The cutting device according to any one of claims 1 to 3 ,
A green molded body manufacturing system comprising:

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