JP2017077624A - Manufacturing method of honey-comb compact and manufacturing apparatus of honey-comb compact - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently suppress a honey-comb compact extruded from an extruder from deforming.SOLUTION: A manufacturing method of a honey-comb compact includes a step of continuously extruding a honey-comb compact from a die of an extruder, a step of supporting a lower side surface of the honey-comb compact extruded from the die by an upper surface of a trough part fixed to the die, and a step of contacting a pedestal to a lower surface of a part that exceeds an apex of the trough in the honeycomb compact, followed by repeating moving the pedestal in the extruding direction, and supporting the part of the honeycomb compact by a plurality of the pedestals. A manufacturing method of a honeycomb compact in which an end part on an opposite side from the extruding direction of the trough comes into contact with the die, when a distance from the die of the extruder to the apex of the trough is regarded as Lf, a length in the extruding direction in the pedestal is regarded as Ls, and a distance from the die of the extruder when the pedestal comes into contact with a lower surface of the honeycomb compact to the pedestal is regarded as Lg, Ls>Lf≥Lg is satisfied.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method for manufacturing a honeycomb formed body and an apparatus for manufacturing a honeycomb formed body.

  Honeycomb structures are widely known as filters for purifying gas exhausted from an internal combustion engine, such as diesel particulate filters. The honeycomb structure has a structure in which each cell is arranged so that at least one cell whose one end is sealed with a sealing material is adjacent to the cell whose one end is sealed with a sealing material. .

  Such a honeycomb structure is transported to a step of forming a long green honeycomb formed body having a plurality of cells extending along a predetermined axis, cutting it into a predetermined length, and then firing it. The (Patent Document 1).

JP 2010-214844 A

  In Patent Document 1, a long honeycomb molded body that is extruded in a lateral direction from a die of an extruder is first supported by a collar portion that is inclined below an extrusion port of the extruder, and then is pushed in the extrusion direction. A technique for supporting by a plurality of moving cradles is disclosed.

  However, even with such a method, the suppression of deformation of the honeycomb formed body is not sufficient.

  The present invention has been made in view of the above problems, and a method for cutting a honeycomb molded body, a method for manufacturing the honeycomb molded body, and a honeycomb molded body capable of sufficiently suppressing deformation of the honeycomb molded body extruded from an extruder. Providing manufacturing equipment.

A method for manufacturing a honeycomb formed body according to the present invention includes a step of continuously extruding a honeycomb formed body from a die of an extruder.
Supporting the lower side surface of the honeycomb formed body extruded from the die with the upper surface of the flange fixed to the die;
A plurality of the portions of the honeycomb molded body are formed by repeatedly contacting the cradle with the lower surface of the portion of the honeycomb molded body beyond the tip of the flange, and subsequently moving the cradle in the pushing direction. A step of supporting by the cradle.
An end portion of the flange portion opposite to the pushing direction is in contact with the die.
When the distance from the die of the extruder to the tip of the flange is Lf, the length of the cradle in the pushing direction is Ls, and the cradle contacts the lower surface of the portion of the honeycomb molded body Ls> Lf ≧ Lg is satisfied, where Lg is the distance from the die of the extruder to the cradle.

  According to the present invention, since the end portion of the flange portion is in contact with the die, unnecessary deformation of the honeycomb formed body between the die and the flange portion is suppressed. Further, since Lf is the same as or longer than Lg, it is possible to reduce the sag of the portion of the honeycomb formed body beyond the tip of the flange. Moreover, since Lf is shorter than Ls, the contact distance between the cradle and the ridge after the cradle is raised is shortened, so that the transport of the cradle in the pushing direction becomes smooth.

  Here, 30 mm ≦ Lf ≦ 300 mm can be further satisfied. Furthermore, 30 mm ≦ Lg ≦ 300 mm can be satisfied.

  Moreover, gas can be blown out only from the tip side portion on the upper surface of the flange. Thereby, it is easier to further suppress deformation of the honeycomb formed body while suppressing drying by gas.

  Moreover, the process which cut | disconnects the said honeycomb molded object in the part between the said two cradles to move can be further provided.

An apparatus for manufacturing a honeycomb formed body according to the present invention includes an extrusion molding machine having a die for continuously extruding a honeycomb formed body,
A heel part fixed to the extrusion molding machine and supporting a lower side surface of the extruded honeycomb molded body,
A cradle raising mechanism for bringing the cradle into contact with the lower surface of the portion of the honeycomb molded body beyond the tip of the flange, and
A cradle moving mechanism for moving the cradle in the pushing direction is provided.
An end portion of the flange portion opposite to the pushing direction is in contact with the die.
When the distance from the die of the extruder to the tip of the flange is Lf, the length of the cradle in the pushing direction is Ls, and the cradle contacts the lower surface of the portion of the honeycomb molded body Ls> Lf ≧ Lg is satisfied, where Lg is the distance from the die of the extruder to the cradle.

  According to the present invention, deformation of the honeycomb formed body extruded from the extruder can be sufficiently suppressed.

It is a mimetic diagram showing one embodiment of a honeycomb fabrication object manufacturing device concerning the present invention. (A) is a perspective view which shows an example of a honeycomb molded object, (b) is the elements on larger scale of a honeycomb molded object. It is III-III sectional drawing of FIG. It is the figure which looked at the extrusion molding machine and collar part of FIG. 1 from the top. It is a perspective view which shows an example of the receiving stand of FIG. It is a schematic diagram which shows the mode of operation | movement of the honeycomb molded object manufacturing apparatus of FIG. It is a perspective view which shows typically the structure of the cutting device of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a honeycomb molded body manufacturing apparatus 100 according to an embodiment of the present invention.
(Extruder)
As shown in FIG. 1, the extrusion molding machine 10 includes a screw 2 provided in the housing 1. The screw 2 is for kneading the raw material composition supplied from the inlet 1a and transferring it downstream. On the downstream side of the housing 1, a flow rate adjusting plate 5 provided as necessary and a die 8 for extruding the honeycomb formed body 70A in the horizontal direction are further provided.

  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 can have a plurality of through holes 5a having a diameter of 1 to 10 mm that penetrate in the thickness direction.

  The die 8 has a flow path (not shown) for forming the honeycomb formed body 70 having the shape shown in FIG. 2 from the raw material composition. By passing the raw material composition through the die 8, for example, a honeycomb molded body 70A having a partition wall 72 forming a large number of through holes 71a and 71b having a hexagonal channel cross section and a cylindrical outer peripheral wall 72s is formed. It is formed.

  A flange 35 is fixed to the die of the extruder 10. As shown in FIG. 3, the flange portion 35 has a shape obtained by cutting out only the portion of the angle θ in the cylinder, and the axial direction and the pushing direction coincide with each other. For example, θ can be set to 60 to 180 °. Further, as shown in FIG. 4, the end 35 e 1 opposite to the pushing direction of the flange 35 is fixed to the die 8 so as to contact the peripheral portion 8 p of the outlet 8 out of the die 8. Therefore, the honeycomb formed body 70A that has come out from the outlet 8out of the die 8 is immediately supported on the upper surface of the flange portion 35.

  Further, as shown in FIG. 4, a large number of gas ejection holes 35b are provided in a region 35U2 at the end of the upper surface 35U of the flange portion 35 on the extrusion direction FA side (tip side). On the other hand, an ejection hole is not provided in a region 35U1 on the upper surface of the flange portion 35 opposite to the extrusion direction FA. Here, in order to suppress drying of the lower surface of the honeycomb formed body, the area of the region 35U2 / the area of the upper surface 35U = (S35U2) / (S35U) is preferably less than 0.5. The flange 35 has a hollow structure, and as shown in FIG. 1, a blower 37 that supplies gas to the internal space of the flange 35 is connected to the lower surface of the flange 35.

  Here, the axial length of the flange 35, that is, the axial length from the die 8 to the end (tip) 35e2 of the flange 35 is defined as Lf. Lf can be 30 mm ≦ Lf ≦ 300 mm. Further, Lf ≦ 0.8Ls may be satisfied.

  Moreover, the thickness of the collar part 35 in FIG. 3 can be 1.0-5.0 mm.

(Receiver raising mechanism)
Returning to FIG. 1, the cradle raising mechanism 40 is provided below the honeycomb formed body 70 </ b> A. The cradle raising mechanism 40 includes a cradle holding portion 41 having a plurality of rollers 41R and a cradle upper and lower portion 42 that moves the cradle holding portion 41 up and down. When the cradle upper and lower parts 42 hold the cradle holding part 41 in the lower position, the cradle supply mechanism 50 having the rollers 51 </ b> R supplies the cradle 31 onto the cradle holding part 41.

  As shown in FIG. 5, the cradle 31 includes an elastic main body 31b made of sponge and a hard bottom 31c made of resin (for example, vinyl chloride). A concave portion 31a corresponding to the shape of the side surface of the honeycomb formed body 70A is formed in the main body portion 31b made of sponge. In the present embodiment, since the honeycomb formed body 70A has a cylindrical shape, the recess 31a has a semicircular cross-sectional shape. The pedestal 31 can support the honeycomb formed body 70 </ b> A by the recess 31 a contacting the honeycomb formed body.

  Here, as shown in FIG. 1, the length in the pushing direction (axial direction) of the cradle 31 is Ls. Ls may be equal to or shorter than the length Lh of the honeycomb formed body 70 after cutting shown in FIG. 6, and may be, for example, Ls + 10 mm to Ls + 90 mm. Lh may be set according to the desired length of the honeycomb formed body, and can be set to 100 to 350 mm, for example.

  As shown in FIG. 6, the cradle raising mechanism 40 raises the cradle holding portion 41 while holding the cradle 31. Thereby, in the long honeycomb molded body 70A, the portion 70AB beyond the end portion (tip) 35e2 on the extrusion direction side of the flange portion 35 is supported by the concave portion 31a of the receiving base 31, and the honeycomb molded body 70 is deformed by gravity. Is alleviated. At this time, the cradle holding portion 41 is raised at a timing that does not come into contact with the preceding pedestal 31A supplied by the previous cradle raising mechanism 30 by a control unit (not shown). The distance between the pedestals 31 that support the honeycomb formed body 70 is not particularly limited, but can be set to 2 to 50 mm in consideration of the ease of a cutting process described later. As shown in FIG. 6, the cradle raising mechanism 30 raises the cradle 31 to substantially the same level as the cradle 31 on the cradle moving mechanism 60.

  Here, the distance (in the extrusion direction) from the die 8 to the cradle 31 when the recess 31a of the cradle 31 contacts the lower surface of the honeycomb molded body 70A is Lg. Lg can be 30 mm ≦ Lg ≦ 300 mm.

  In this embodiment, Ls> Lf ≧ Lg is satisfied. In the case of Lf> Lg, when the cradle raising mechanism 40 raises the cradle 31, the cradle 31 contacts not only the honeycomb formed body 70A but also the lower surface of the flange portion 35. Further, in the case of Lf = Lg, when the cradle raising mechanism 40 raises the cradle 31, the cradle 31 does not contact the lower surface of the flange portion 35 but contacts only the honeycomb formed body 70A. Become.

  Since the cradle holding portion 41 includes the roller 41R, when the cradle 31 comes into contact with the lower surface of the honeycomb molded body 70A as shown in FIG. 6, the cradle 31 is subsequently moved along with the movement of the honeycomb molded body 70A. It moves in the extrusion direction while supporting the molded body 70A.

  A cradle moving mechanism 60 having a roller 61R is disposed in the downstream direction (the pushing direction) of the cradle holding portion 41 in the raised position. Accordingly, the cradle 31 that supports the honeycomb formed body 70A moves on the cradle moving mechanism 60 along the extrusion direction.

(Cutting device)
A cutting device 80 having a wire 80 </ b> W is provided above the cradle moving mechanism 60. The cutting device 80 is for cutting the honeycomb formed body 70A supported by the two pedestals 31 between the pedestals 31 to obtain the honeycomb formed body 70 having a predetermined length. As shown in FIG. 7, the cutting device 80 includes a frame plate 82 having an inverted U shape. The frame plate 82 has two tip portions 82a and 82b that are spaced apart in the horizontal direction and extend downward. The distal end portion 82a is provided with a sending servo motor 83a, and the distal end portion 82b is provided with a receiving servo motor 83b. A sending bobbin 84a is provided on the rotating shaft of the sending servo motor 83a, and a receiving bobbin 84b is provided on the rotating shaft of the receiving servo motor 83b via a tension sensor 85. A wire 80W is stretched from the sending bobbin 84a to the receiving bobbin 84b. Although the material of the wire 80W is not specifically limited, For example, a steel wire etc. are mentioned. The diameter of the wire 80W is preferably 1000 μm or less, and more preferably 120 to 500 μm.

  The sending servo motor 83a, the receiving servo motor 83b, and the tension sensor 85 are connected to a tension controller 86. Based on the tension acquired from the tension sensor 85, the tension controller 86 controls the rotation of the sending bobbin 84a and the receiving bobbin 84b so that the tension of the wire 80W is within a predetermined range, and the wire 80W is predetermined. The two motors are controlled so as to move in the X direction from the sending-side bobbin 84a toward the receiving-side bobbin 84b 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. The moving speed of the wire 80W in the X direction is not particularly limited, but can be 20 to 200 mm / s.

  The vertical drive unit 81 moves the support unit 82c provided on the frame plate 82 in the vertical direction (Z-axis direction), thereby causing the wire W to move in the B direction perpendicular to the A direction (X direction) in which the wire extends. Move in (-Z direction). The mechanism by which the vertical drive unit 81 moves the wire W in the vertical direction is not particularly limited, and for example, a rack and pinion mechanism can be used. The moving speed in the −Z-axis direction of the support portion 82c at the time of cutting, that is, the wire W is not particularly limited, but may be, for example, 20 to 200 mm / s.

  In this way, the cutting device 80 moves in the vertical direction while moving the wire 80W in the horizontal direction, and cuts the honeycomb formed body at a position between the receiving bases 31.

<Honeycomb compact>
The material of the honeycomb formed body 70 is not particularly limited, but can be green (ceramic raw material) that becomes ceramics 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 honeycomb formed 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 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. Further, magnesium source powder such as magnesia powder and magnesia spinel powder and / or silicon source powder 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. 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.
The outer diameter of the honeycomb formed body can be set to 100 to 250 mm, for example.

<Method for manufacturing honeycomb formed body>
In the method for manufacturing a honeycomb formed body according to the present embodiment, first, the honeycomb formed body 70A is continuously extruded from the die 8 of the extruder 10. Next, the lower side surface of the honeycomb formed body 70 </ b> A pushed out from the die 8 is supported by the concave portion (upper surface) 35 a of the flange portion 35. The gas can be blown out arbitrarily, and can be carried out without blowing the gas. Next, the pedestal 31 is brought into contact with the lower surface of the portion 70AB of the honeycomb molded body 70A beyond the end portion (tip) 35e2 of the flange portion 35 by the pedestal raising mechanism 40, and then the roller 41R and the roller 61R. By repeatedly moving the cradle 31 in the push-out direction, the plurality of cradles 31 support portions 70AB of the honeycomb molded body 70A beyond the end portion (tip) 35e2 of the flange portion 35.

  According to this embodiment, since the end 35e1 on the opposite side to the extrusion direction of the flange 35 is in contact with the die 8, unnecessary deformation between the die and the flange 35 is suppressed.

  Further, since Lf is the same as or longer than Lg (see FIG. 6), the sagging of the portion of the honeycomb formed body 70A beyond the end portion (tip) 35e2 of the flange portion 35 can be reduced. That is, when Lf is smaller than Lg, the length of the portion 70AB protruding from the end portion (tip) 35e2 of the flange portion 35 of the honeycomb molded body 70A becomes considerably large, and the honeycomb molded body 70A is then supported by the pedestal 31. Since it is supported, it causes a large deformation due to the drooping of the honeycomb formed body 70A. However, since the above condition is satisfied, this is suppressed.

  Moreover, since Lf is shorter than Ls, the contact distance between the cradle and the ridge after the cradle is raised is shortened, so that there is an effect that the transport of the cradle in the pushing direction becomes smooth.

  Accordingly, deformation of the honeycomb formed body 70 can be suppressed. Deformation includes deformation of the cylinder itself and distortion of the cell structure. The deformation of the cylinder itself deteriorates the product dimensional accuracy. Further, the distortion of the cell structure makes it difficult to seal in the subsequent process.

  In the case of Lg> Lf, even if the length of the portion of the honeycomb formed body 70A protruding from the end portion (tip) 35e2 of the flange portion 35 is less than the length Ls of the pedestal 31, It can be supported by the base 31. Therefore, deformation of the part AB of the honeycomb formed body can be further suppressed. In addition, since the cradle 31 has elasticity, even when it contacts the collar part 35, it can contact and support the honeycomb formed body 70A.

  Then, the honeycomb formed body 70 having excellent shape accuracy can be efficiently obtained by cutting the honeycomb formed body 70A with the wires 80W in the vertical direction and in the direction perpendicular to the extrusion direction.

  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 embodiment, the case where the extrusion direction is the horizontal direction is illustrated, but the horizontal direction is not necessarily required, and the extrusion direction may be slightly inclined (about ± 5 °) from the horizontal direction. Moreover, in the said embodiment, although the collar part 35 is arrange | positioned in parallel with the extrusion direction, ie, horizontally, you may incline below in the extrusion direction.

  The configuration of the gas supply means for supplying the injection gas to the gas ejection holes 35b is not limited to the above-described embodiment, and can take various forms. Note that the propellant gas is not limited to air or wet air.

  Further, the shape and arrangement of the through holes 70a and 70b of the honeycomb formed body are not particularly limited. For example, any shape such as a polygon such as a rectangle, a square, or a triangle, a circle, or an ellipse may be used. The outer shape of the honeycomb formed body 70 is not limited to a cylindrical body, and may be a square column such as a square or a rectangle.

  Moreover, the cutting method of a cutting device is not limited to a wire, For example, you may cut | disconnect with a blade.

(Examples 1-4)
<Preparation of raw material mixture>
Aluminum oxide powder, titanium oxide powder, magnesium oxide powder, glass (SiO ₂ ) powder, aluminum magnesium titanate powder, pore former (starch), dispersant (polyoxyethylene polyoxypropylene butyl ether), lubricant and plasticizer ( A paste containing glycerin), an organic binder, and water was prepared. The content of each component in the paste is shown below.
[Composition of raw material mixture (paste)]
Aluminum oxide powder: 37.3 parts by mass Titanium oxide powder: 36.5 parts by mass Magnesium oxide powder: 1.9 parts by mass SiO ₂ : 3.2 parts by mass.
Aluminum magnesium titanate powder: 8.8 parts by weight Pore forming agent: 13.8 parts by weight starch obtained from potato with an average particle size of 25 μm Dispersant: 4.5 parts by weight Lubricant and plasticizer: 0.4 parts by weight organic binder : 6.1 parts by weight Water: 24.7 parts by weight

  After kneading the paste, a honeycomb formed body as shown in FIG. 2 was obtained in the apparatus shown in FIG. 1, supported by a cradle, and conveyed to a subsequent cutting apparatus. The cell density of the honeycomb formed body was 300 cpsi, and the cell wall thickness was 0.3 mm. The molded body had a large number of through holes (cross-sectional shape: hexagonal shape) extending in the longitudinal direction.

  Table 1 shows the Lf, Lg, Ls, and the presence or absence of air ejection from the buttocks in Examples 1 to 4.

The diameter of the honeycomb formed body was 162 mm, the extrusion speed was 200 to 300 mm / min, and the air flow rate when air was blown out was 0.3 to 0.4 m ³ / min.

結果を表１に示す。なお、「搬送性が良好」とはそれぞれの受台３１間の距離が一定間隔に搬送されている状況であることを意味し、「搬送性が不良」とは受台３１間の距離が不定であることを意味する。「円筒度」は円柱の最大内接円柱の半径と最大外接円柱の半径の差であり、１．８ｍｍ以下であることが好ましい。また、「セル歪みあり」とは、ダイの流路の中心軸と、ハニカム成形体の流路の中心軸とのずれが０．６ｍｍ超であることを示し、「セル歪みなし」とは上記ずれが０．６ｍｍ以下であることを示す。 (Comparative Examples 1 and 2)
Molding of Comparative Example 1 was performed in the same manner as in Example 1 except that the flange portion 35 was not used, and molding of Comparative Example 2 was performed in the same manner as in Example 1 except that Lf was increased to make Ls the same.

The results are shown in Table 1. “Good transportability” means that the distance between the cradles 31 is transported at a constant interval, and “bad transportability” means that the distance between the cradles 31 is indefinite. It means that. The “cylindricity” is the difference between the radius of the largest inscribed cylinder of the cylinder and the radius of the largest circumscribed cylinder, and is preferably 1.8 mm or less. Further, “with cell distortion” indicates that the deviation between the central axis of the flow path of the die and the central axis of the flow path of the honeycomb formed body is more than 0.6 mm, and “without cell distortion” The deviation is 0.6 mm or less.

  DESCRIPTION OF SYMBOLS 8 ... Die, 10 ... Extrusion molding machine, 31 ... Receiving base, 31a ... Recessed part, 35 ... Gutter part, 35e2 ... End part (tip), 35b ... Gas ejection hole, 40 ... Receiving base raising mechanism, 60 ... Receiving base movement Mechanism: 80 ... cutting device, 70 ... honeycomb formed body, 70A ... honeycomb formed body, 100 ... honeycomb formed body manufacturing apparatus.

Claims (6)

A process of continuously extruding a honeycomb formed body from a die of an extruder,
Supporting the lower side surface of the honeycomb formed body pushed out from the die with the upper surface of the flange fixed to the die;
A plurality of the portions of the honeycomb molded body are formed by repeatedly contacting the cradle with the lower surface of the portion of the honeycomb molded body beyond the tip of the flange, and subsequently moving the cradle in the pushing direction. A step of supporting by the cradle of
The end of the collar opposite to the direction of extrusion contacts the die,
The distance from the die of the extrusion molding machine to the tip of the flange is Lf,
The length of the cradle in the pushing direction is Ls, and
When the distance from the die of the extrusion molding machine to the cradle when the cradle comes into contact with the lower surface of the portion of the honeycomb formed body is Lg,
A method for manufacturing a honeycomb formed body satisfying Ls> Lf ≧ Lg.   The method according to claim 1, further satisfying 30 mm ≦ Lf ≦ 300 mm.   The method according to claim 1, further satisfying 30 mm ≦ Lg ≦ 300 mm.   The method according to any one of claims 1 to 3, wherein gas is blown out only from the tip side portion of the upper surface of the flange portion.   The method according to any one of claims 1 to 4, further comprising a step of cutting the honeycomb formed body at a portion between the two moving cradles. An extrusion molding machine having a die for continuously extruding a honeycomb molded body,
A heel part fixed to the extrusion molding machine and supporting a lower side surface of the extruded honeycomb molded body,
A cradle raising mechanism for bringing the cradle into contact with the lower surface of the portion of the honeycomb molded body beyond the tip of the flange, and
A cradle moving mechanism for moving the cradle in the pushing direction,
The end of the collar opposite to the direction of extrusion contacts the die,
The distance from the die of the extrusion molding machine to the tip of the flange is Lf,
The length of the cradle in the pushing direction is Ls, and
When the distance from the die of the extrusion molding machine to the cradle when the cradle comes into contact with the lower surface of the portion of the honeycomb formed body is Lg,
A honeycomb molded body manufacturing apparatus that satisfies Ls> Lf ≧ Lg.

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