JP2007296747A - Mold for extrusion molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold for extrusion molding capable of molding without applying an excessive pressure, sufficiently filling a molding material into a space between hollow holes, preventing decrease in strength of a molded body from being generated, and performing a stable production. <P>SOLUTION: The mold is equipped with a main mold 1 having a flow path 3 through which the molding material flows, and a core mold 2 arranged in the flow path 3 in this main mold 1. The core mold 2 is equipped with a supporting body 4 and a plurality of projecting parts 5 projecting toward the flowing direction of the molding material from this supporting body 4. The projecting parts 5 are provided along the flow path 3 in parallel in a row, and the rows of the projecting parts are arranged in the direction orthogonal to the arranging direction in a zigzag and multi-stages. The supporting body 4 is equipped with branching parts 6 for making the flow direction of the molding material flowing in the flow path 3 branch in the stacking direction between the adjoining projecting parts 5 in the stacking direction, and branched paths 7 for making the flowing direction of the branched molded material branch between the adjoining projecting parts 5 in the respective rows. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an extrusion mold for extruding a molding material such as a cement-based molding material to form a molded body having hollow holes.

  A molded body B (see FIG. 6) having a plurality of hollow holes 13 formed by extruding a molding material such as a cement-based molding material is used as an outer wall of a building.

  Such a molded body B has been manufactured using, for example, an extrusion mold A ′ as shown in FIG. The illustrated extrusion mold A ′ is provided with a core mold 2 ′ for forming a hollow hole 13 in the vicinity of the extrusion port 18 of the flow path 3 through which the molding material of the main body mold 1 flows. The core mold 2 ′ is provided with a plurality of protrusions 5 arranged in a line with respect to a plurality of support bodies 4 ′ that are long in the direction orthogonal to the paper surface of the drawing. Are provided in accordance with the number of the hollow holes 13 provided in the molded body B.

  In such an extrusion mold A ′, the molding material completely branches up and down at the end portion of the support 4 ′ indicated by symbol A in the drawing, and flows between the supports 4 ′. It is introduced between each row of the projections 5. After that, while the molding material flows between the rows of the protrusions 5, the molding material flows up and down until the molding material is extruded from the extrusion port 18 of the main body mold 1, and is filled between the projections 5 in each row. Is done. The flow path 3 is formed such that the flow path 3 is wide at the position where the support 4 ′ is disposed and is gradually narrowed toward the extrusion port 18 in order to provide the support 4 ′ with a space above and below the paper surface. Has been.

  However, when such a core mold 2 ′ is used, the molding material once branched up and down must be further flowed up and down to join between the protrusions 5 in the row. There is a problem that an excessive extrusion pressure is required to sufficiently fill the molding material, and the flow path 3 becomes narrower toward the extrusion port 18 as described above, and thus the extrusion port 18 indicated by B in the figure. There is a problem that a very large compressive force is applied in the vicinity. In addition, when such a large extrusion pressure is applied, the inverse emulsion structure in the molding material is destroyed, especially when an inverse emulsion type cement-based molding material containing an oily substance and various surfactants is used as the molding material. However, there is also a problem that the subsequent curing is hindered. In addition, when the molding material once completely branched up and down in this way is further flowed up and down and integrated in the vicinity of the extrusion port 18 indicated by B in the drawing between the projections 5, the molding material is molded at the joining position of the molding material. There is a possibility that the familiarity between the materials will deteriorate and problems such as a decrease in strength of the molded body B may occur. Furthermore, when the shape of the flow path 3 is formed as described above, it is not easy to change the number of core molds 2 ′, and it is difficult to change the number of hollow holes 13 in the molded body B. .

  A core type 2 'as shown in FIG. 7B has also been proposed (see Patent Documents 1 and 2). The core mold 2 ′ has a plurality of slits 25 formed on the front end side, a plurality of protrusions 5 for forming the hollow holes 13 between the slits 25, and each slit on the rear end side. A plurality of introduction holes 26 communicating with the 25 intersection positions are provided. Then, after the molding material is introduced into each introduction hole 26, the molding material is supplied into the slit 25 from the intersecting portion of the slit 25. For this reason, the molding material is supplied between the protrusions 5 from a plurality of locations around each protrusion 5 and is uniformly filled around the protrusion 5.

However, even in the case shown in FIG. 7 (b), the flow path of the molding material becomes very narrow at the communication position between the introduction hole 26 and the slit 25, and a large extrusion pressure is still necessary for the molding material to pass therethrough. In addition, a large extrusion pressure is required for filling the molding material supplied from each introduction hole 26 into the slit 25. In addition, a sharp corner is formed between the openings of the introduction hole 26 on the rear end surface of the core mold 2 ′, and if a filler such as a fiber in the molding material is caught at the corner, the material may be clogged. In addition, there is a possibility that cleaning of the core mold 2 'when such a situation occurs requires a complicated work. Further, since the core mold 2 ′ is integrally formed, there is a problem that another core mold 2 ′ must be prepared when the number of the hollow holes 13 is changed.
JP 2005-254345 A JP 2006-51682 A

  The present invention has been made in view of the above points, and when forming a molded body having a hollow hole by extruding a molding material such as a cement-based molding material, molding is performed without applying excessive pressure. It is an object of the present invention to provide an extrusion mold that is capable of performing stable production by being sufficiently filled with a molding material between hollow holes and preventing occurrence of a decrease in strength of the resulting molded body. To do.

  The invention according to claim 1 is an extrusion mold A for forming a molded body B having a plurality of hollow holes 13 by extruding a molding material, and has a flow path 3 through which the molding material flows. A main body mold 1 and a core mold 2 disposed in a flow path 3 in the main body mold 1 are provided. The core mold 2 includes a support body 4 and a plurality of protrusions 5 protruding from the support body 4 in the flow direction of the molding material. The protrusions 5 are provided in a row in parallel and parallel along the flow path 3 and the rows of the protrusions 5 are provided in a staggered manner in a direction perpendicular to the alignment direction. The support 4 has a branching portion 6 that branches the flow direction of the molding material flowing in the flow path 3 in the stacking direction between the rows of protrusions 5 adjacent in the stacking direction, and the branched molding. And a branch path 7 that branches the material flow direction between the adjacent protrusions 5 in each row.

  According to a second aspect of the present invention, in the first aspect, the core mold 2 can be divided into divided bodies 8 having one or a plurality of rows of protrusions 5.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the support 4 is provided with a plurality of recesses 9 constituting the branch path 7 on the end surface in the step-up direction of the protrusion 5. The main body mold 1 is composed of a pair of divided molds 10 that can be divided in the stacking direction of the protrusions 5. A plurality of convex portions 11 are provided on the inner surface of the split mold 10 so as to contact the outer edge of the concave portion 9 and close the openings of the concave portions 9 on the end surface.

  In the invention according to claim 1, when the molding material is extruded to obtain a molded body, the molding material passes through the core mold, whereby a hollow hole is formed in the molded body. When the molding material passes through the core mold, the molding material is first branched in the stacking direction of the protrusions at the branching portion of the support, and then branched to the branching path and passes between the protrusions in the row. At this time, since the protrusions are arranged in a staggered manner, the molding material is formed around the protrusions between the protrusions adjacent in the column direction and the protrusions adjacent in the stacking direction. It will flow in parallel along the protruding direction. For this reason, the molding material can be sufficiently filled around the projection without applying high extrusion pressure, and the molding material flowing around the projection can be easily blended and integrated so that the strength of the molded body, etc. In particular, even when using an inverse emulsion type cement-based molding material containing an oily substance and various surfactants as a molding material, molding is performed due to excessive pressing force. It is possible to prevent the inverse emulsion structure in the material from being destroyed and hindering subsequent curing.

  In the invention according to claim 2, the core mold can be easily cleaned by dividing the core mold, and the number of hollow holes in the molded body can be easily changed by changing the number of divided bodies constituting the core mold. Can be changed.

  In the invention according to claim 3, the core mold can be fixed in the flow path by sandwiching the core mold with the divided body, and the core mold can be taken out, cleaned and replaced by dividing the main body mold into the divided bodies. Etc. can be easily performed, and further, a branch path is formed between the split-type convex portions to ensure the flow of the molding material further outward of the projections located on the outermost side in the stacking direction. be able to.

  Hereinafter, the best mode for carrying out the present invention will be described.

  An extrusion mold A shown in FIG. 1 is formed by a main body mold 1 constituted by a pair of split molds 10 and a core mold 2 having a support 4 and a protrusion 5.

  First, the core mold 2 will be described with reference to FIGS. The core mold 2 is configured by projecting a plurality of protrusions 5 in parallel from one end of a support 4. The protrusion 5 shown in the figure has a cylindrical shape, but the protrusion 5 is formed in another appropriate shape such as a hexagonal column depending on the shape of the hollow hole 13 formed in the molded body B. The protruding direction of the protrusion 5 with respect to the support 4 coincides with the flow direction of the molding material. The plurality of projections 5 are provided in a row in parallel and parallel to each other, and the rows of the projections 5 are provided in a direction orthogonal to the arrangement direction. Between the rows of adjacent protrusions 5, the plurality of protrusions 5 are arranged in a staggered manner so that the protrusions 5 in the other row are arranged between the protrusions 5 in one row. Each protrusion 5 is formed in a columnar shape, and a large-diameter portion 20 having a diameter larger than that of the base portion is formed at an end portion thereof. Between the base side of each protrusion 5 and the large-diameter portion 20, an enlarged-diameter portion 21 whose diameter gradually increases is formed. Moreover, the end surfaces of all the protrusions 5 are formed flush with each other.

  A branch portion 6 is formed at the end of the support 4 opposite to the protrusion 5. The branch portion 6 is provided for each row of a pair of protrusions 5 adjacent in the stacking direction. Hereinafter, “row direction” refers to the row direction of the protrusions 5, and “step stacking direction” refers to the step stacking direction of the protrusions 5. The branching portion 6 is formed at a position corresponding to the row of the protrusions 5 on the support 4 and is provided over the entire row of the protrusions 5 in the row direction. The branching portion 6 is formed so as to protrude on the opposite side to the protruding portion 5, and is formed so that the thickness becomes thinner toward the protruding direction side. Moreover, the edge part of the protrusion direction of this branch part 6 is formed in the convex curve.

  A plurality of support portions 14 that support the protrusions 5 protrude from the branch portion 6. Two support portions 14 are provided for each branch portion 6. The support portions 14 in each row are provided at intervals so as to match the rows of the protrusions 5, and the support portions 14 in the other row are arranged between the support portions 14 in one row, and the protrusions They are arranged in a staggered pattern similar to 5. The outer surface of each support portion 14 in the stacking direction with respect to the branching portion 6 is formed in a plane parallel to the protruding direction of each protrusion 5. In addition, a taper portion 15 whose thickness increases toward the base portion is integrally provided inside the support portion 14 in the stacking direction with respect to the branch portion 6 except for the tip portion. The tapered portion 15 is integrated with the two support portions 14 on both sides thereof. Projections 5 project from the end surfaces of the support portions 14.

  A branch path 7 is formed between adjacent support portions 14 in each row. The branch path 7 communicates with the projecting portion 5 side and the branch portion 6 side, and the inner surface is formed by the outer surfaces of the support portion 14 and the taper portion 15. The opening on the branching section 6 side of each branching path 7 is formed at a position that opens on both sides in the stacking direction of the branching section 7 and enters the projecting side from the tip of the branching section 6. At this time, since the plurality of support parts 14 are arranged in a staggered manner, the branch path 7 is provided between the support parts 14 arranged in the row direction, and the branch path 7 is also provided between the support parts 14 arranged in the stacking direction. Is provided. At this time, a plurality of support portions 14 are provided in a line on both end surfaces of the support body 4 in the stacking direction, and a branch path 7 is opened between the support portions 14 at the end face of the support body 4. It is formed as a concave portion 9 to be formed.

  Such a core mold 2 can be constituted by a plurality of divided bodies 8 having one or a plurality of rows of protrusions 5. In the example shown in FIG. 4, the divided body 8 includes a support body 16 obtained by dividing the support body 4, and two rows of protrusions 5 projecting from the support body 16. The support split 16 has a shape in which the support 4 is divided between adjacent branch portions 6 by a plane parallel to the row direction, and has one branch portion 6 and two rows of support portions 14. Between the support portions 14 in each row, there is provided a recess 9 that opens to the support portion 14 side and the protrusion 5 side and opens outward in the stacking direction of the rows of the support portions 14. 9 constitutes the branch path 7. And the protrusion 5 is protrudingly provided by the end surface of the some support part 14. As shown in FIG.

  By stacking an appropriate number of such divided bodies 8 in the stacking direction of the support 4, a core mold 2 as shown in FIGS. 2 and 3 can be formed. At this time, the position of the concave portion 9 of one divided body 8 and the position of the support portion 14 of the other divided body 8 overlap with each other on the opposing surface of the divided bodies 8 that are stacked next to each other, and It arrange | positions so that edge parts may contact | abut, and the opening of the outer surface of the recessed part 9 is obstruct | occluded by the support part 14. FIG. It should be noted that the core mold 2 may be formed with only the divided body 8.

  Further, in the example shown in FIG. 5, the divided body 8 includes a support body 16 obtained by dividing the support body 4, and a row of protrusions 5 protruding from the support body 16. The support split 16 has a shape in which the support 4 is divided between the adjacent branch portions 6 by a plane parallel to the column direction, and further divided by a plane parallel to the column direction at the position of the branch portion 6. The support body 16 in the example shown in FIG. The support body 16 of each divided body 8 includes a branch body portion 17 having a shape in which the branch portion 6 is cut into two parts, and support portions 14 and taper portions 15 that alternately protrude from the branch body portion 17 in a row. Is done. And the protrusion 5 is protrudingly provided by the end surface of the some support part 14. As shown in FIG.

  A plurality of the divided bodies 8 are stacked in the stacking direction to form the core mold 4. At this time, the two divided bodies 8 adjacent to each other in the stacking direction are arranged so that the stacking directions are opposite to each other. In this core mold 4, as shown in FIGS. 2 and 3, the support portions 14 and the protrusions 5 are arranged in a staggered manner, and the branch portions 6 are provided for each row of the pair of protrusions 5. A branch path 7 is provided between the support portions 14 adjacent to each other in the column direction and the stacking direction. At this time, if the number of the divided bodies 8 is an even number, a plurality of support portions 14 are provided in a row on both end surfaces in the stacking direction of the support body 4 as shown in FIGS. A branch path 7 is formed as a recess 9 that opens at the end face of the support 4 between the support portions 14. On the other hand, when the number of the divided bodies 8 is an odd number, a plurality of support portions 14 and concave portions 9 that become the branch paths 7 are provided on one end face in the stacking direction of the support body 4 in the same manner as described above. However, at the other end, the support portions 14 and the taper portions 15 are alternately formed and are flush with each other, and the recess 9 is not provided.

  Next, the main body mold 1 will be described. The body mold 1 has a flow path 3 through which a molding material flows, and the core mold 2 is disposed in the flow path 3.

  The main body mold 1 can be composed of a pair of split molds 10. The split mold 10 can be split in the stacking direction, and the flow path 3 of the molding material is formed between the stacked split molds 10.

  The downstream end of the flow path 3 of the main body mold 1 is opened at the end face of the main body mold 1, and this opening serves as an extrusion port 18 for the molding material. The core mold 2 is disposed in the flow path 3 so that the opening of the extrusion port 18 and the end surface of each protrusion 5 are flush with each other.

  The inner surface of each divided mold 10, that is, the surface constituting the inner surface of the flow path 3 is supported by sandwiching the support body 4 in the flow path 3 by contacting each end face of the support body 4 in the stacking direction. A convex portion 11 is provided. The protrusions 11 are provided as a plurality of protrusions along the flow direction of the molding material in the flow path 3, and are provided at positions that match the arrangement position of the support 4. In addition, each convex portion 11 is provided at a position that coincides with the opening of each concave portion 9 constituting the branch path 7 on the end surface in the stacking direction of the support body 4, and the edge portions on both sides of the convex portion 11 are formed on the concave portion 9. By contacting the outer edge, that is, the edge of the support portion 14 on both sides of the recess 9, the opening on the outer surface of the recess 9 is closed. For this reason, while supporting the support body 4 by the convex part 11, the branch path 7 (7a) through which a molding material can distribute | circulate between this convex part 11 is formed. For this reason, the branch path 7 is also formed on the outer side of the support portion 14 positioned at the end portion of the support body 4 in the stacking direction. Here, in the illustrated example, an example in which the rows of the protrusions 5 in the core mold 2 are even rows (four rows) is shown. In this case, between the adjacent convex portions 11 in one split mold 10 as shown in the drawing. These projecting portions are arranged so that the projecting portions 11 in the other split mold 10 face each other.

  Although not shown, in the case where the core mold 2 is constituted by the divided bodies 8 as shown in FIG. 5, the core having the rows of the odd-numbered protrusions 5 by the odd number of divided bodies 8. When the mold 2 is configured, the convex portion is provided at the position where one end surface side of the support 4 matches the opening of each concave portion 9 as described above, but the concave portion 9 is provided on the other end surface side of the support 4. The opening 11 is not open, and the protrusion 11 is formed at a position that coincides with the arrangement position of the taper portion 15. At this time, each convex portion 11 in one split mold 10 and each convex portion 11 in the other split mold 10 are arranged at positions facing each other, and the convex portions are shifted from the positions in the example shown in FIG. 11 is provided. In this case, the convex portion 11 supports the support body 4 by contacting the tapered portion 15, and the branch path 7 (7 a) through which the molding material can flow between the convex portions 11 outside the support portion 14. Is formed.

  Further, in the main body mold 1, at the downstream side of the arrangement position of the support body 4 in the flow path 3, that is, at the position where the protrusion 5 is disposed, the flow path toward the downstream side upstream of the inner surface of each divided mold 10. A taper 19 that gradually narrows 3 is provided, and on the downstream side of the taper 19, the inner surface becomes a surface along the protruding direction of the protrusion 5, and the width of the flow path 3 to the pressing port 18. Is uniform.

  Next, formation of the molded body B using the extrusion mold A thus formed will be described.

  An extrusion mold A as described above is provided in an appropriate extrusion molding apparatus, an extrusion pressure is applied to the molding material, and it is supplied to the flow path 3 in the main body mold 1 and extruded from the extrusion port 18 to form a molded body B. .

  Although it will not restrict | limit especially if it is a material used for extrusion molding as a molding material, Especially a cement-type molding material can be used. The cement-based molding material 2 can have an appropriate composition, and is prepared, for example, by blending aggregate, fiber, colorant and the like with cement as necessary, and kneading with water. As the cement, arbitrary materials such as ordinary Portland cement, slag cement, alumina cement, and early strength cement can be used. In addition, as the aggregate, silica, silica powder, silica sand, fly ash, slag, crushed stone, and the like can be used. As the fiber, polypropylene fiber, vinylon fiber, acrylic fiber, pulp, carbon fiber, cotton, hemp, metal fiber and the like can be used. Further, iron black, carbon black, chromium oxide, or the like can be used as a colorant.

  In particular, as a cement-based molding material, it contains an oily substance and further contains an emulsifier (inverse emulsifier) such as a nonionic surfactant, various anionic surfactants, and a cationic surfactant as necessary. It is also preferable to use what forms an inverse emulsion (W / O emulsion). The oily substance is not particularly limited as long as it can form an inverse emulsion with water, and usually a hydrophobic liquid substance is used. For example, toluene, xylene, kerosene, styrene, divinylbenzene, methyl methacrylate, Examples include methylolpropane trimethacrylate and unsaturated polyester resins. Among these, when using those having a polymerizable double bond (vinyl monomer) such as styrene, divinylbenzene, methyl methacrylate, trimethylolpropane trimethacrylate, unsaturated polyester resin, etc. In order to accelerate the polymerization of the oily substance, a polymerization initiator such as an organic peroxide or a persulfate, or a crosslinking agent such as trimethylolpropane trimethacrylate can be used in combination.

  In this extrusion molding, when the molding material passes through the core mold 2 in the main body mold 1, the molding material first reaches the branching portion 6, and the molding material is divided by the branching portion 6, and the flow is branched. Branch from the portion 6 to both sides in the stacking direction. At this time, since the end of the branch part 6 is formed as a convex curved surface as described above, the flow of the molding material is smoothly branched.

  Next, the molding material reaches the opening on the upstream side of the branch path 7, and the molding material flows into each branch path 7, whereby the flow of the molding material is directed between the adjacent protrusions 5 in each row. Branch.

  Next, the branched molding material passes through the support part 14 and is led out from the downstream opening of each branch path 7. This molding material flows through the gap between the protrusions 5 in the flow path 3 along the protruding direction of the protrusions 5. Therefore, the molding material flows in parallel around each protrusion 5 along the protrusion direction of the protrusions 5 at the four positions on both sides in the row direction of the protrusions 5 and on both sides in the stacking direction of the protrusions 5. It will be. In this way, while the molding material flows around the protrusion 5, the molding material is sufficiently filled between the protrusions 5, and the interface between the molding materials led out from the different branch paths 7 becomes familiar, and molding is performed. The material is integrated.

  Here, the support 4 of the core mold 2 having the above-described structure is easy to downsize, and the support portion 14 of the support 4 supports the plurality of support portions by arranging the base portions of the protrusions 5 at high density. It is possible to arrange the parts 14 in parallel and parallel. Accordingly, it is not necessary for the flow path 3 of the main body mold 1 to secure an excessively wide space at the position where the support body 4 is disposed. The area can be kept uniform. For this reason, the molding material branched by passing through the support 4 comes into contact with other branched molding materials while flowing in parallel between the protrusions 5, so that the contact between the molding materials is stable. It is maintained, and during this time, the molding materials can be sufficiently blended together. Further, the entire extrusion mold A can be reduced in size.

  Then, the molding material B having the hollow holes 13 as shown in FIG. 6 is formed by extruding the molding material from the extrusion port 18. Fig.6 (a) shows the molded object B obtained when the cylindrical protrusion 5 is applied like this embodiment, and has the hollow hole 13 of circular cross section. Further, when a hexagonal columnar shape is applied as the protrusion 5, a molded body B having a hollow hole 13 having a hexagonal cross section as shown in FIG. 6 (b) can be obtained, and other appropriate shapes can be obtained. By employ | adopting the protrusion 5, the molded object B which has the hollow hole 13 of a desired shape can be obtained.

  The obtained molded body B is cured and cured as necessary, particularly when formed of a cement-based molding material.

  Further, in such an extrusion mold A, the main body mold 1 can be divided into divided molds 10 and the core mold 2 can be taken out. For this reason, the cleaning work in the flow passage is easy, and the core mold 2 can be easily cleaned and replaced. In particular, if the core mold 2 is formed so as to be divided into the divided bodies 8 as described above, cleaning or replacement can be performed for each divided body 8. In addition, in the divided body 8 having the above-described configuration, the recess 9 constituting the branch path 7 is opened to the outside, so that the inside of the branch path 7 can be cleaned very easily.

  Moreover, it becomes easy to change the number of the hollow holes 13 formed in the molded body B by changing the number of the divided bodies 8 constituting the core mold 2.

An example of embodiment of this invention is shown, (a) is sectional drawing seen from the side, (b) is CC sectional drawing of (a). The core type | mold same as the above is shown, (a) is a perspective view from diagonally forward, (b) is a perspective view from diagonally backward. The core type | mold is shown, (a) is the perspective view from diagonally forward which a part was abbreviate | omitted, (b) is a front view. It shows an example of the core-shaped divided body same as the above, (a) is a side view, (b) is a perspective view from an oblique front with a part omitted, and (c) is a perspective view from an oblique rear. . It shows the other example of the core-shaped divided body same as the above, (a) is a side view, (b) is a perspective view from the diagonally forward with a part omitted, (c) is a perspective view from the diagonally rear. is there. (A) And (b) is the partially broken perspective view which shows the example of a molded object. (A) is sectional drawing which shows an example of a prior art, (b) is the partially broken perspective view which shows the other example of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS A Extrusion metal mold B Molded body 1 Main body type 2 Core type 3 Flow path 4 Support body 5 Protrusion part 6 Branch part 7 Branch path 8 Divided body 9 Concave part 10 Divided part 11 Protrusion part

Claims (3)

  An extrusion mold for forming a molded body having a plurality of hollow holes by extruding a molding material, a main body mold having a flow path through which the molding material flows, and a flow path in the main body mold A core mold disposed, and the core mold includes a support body and a plurality of protrusions protruding from the support body in a flow direction of the molding material, the protrusions extending along the flow path. A molding material in which the rows of protrusions are provided in a multi-stage in a staggered manner in a direction orthogonal to the arrangement direction, and the support is circulated in the flow path. A branching portion that branches in the stacking direction between rows of protrusions adjacent in the stacking direction, and a branching direction of the branched molding material between the adjacent protrusions in each row An extrusion mold characterized by comprising a branching path.   2. The extrusion mold according to claim 1, wherein the core mold can be divided into divided bodies having one or a plurality of rows of protrusions.   The support body is provided with a plurality of recesses constituting the branch path on the end surface in the stacking direction of the protrusions, and the main body mold is configured by a pair of split molds that can be divided in the stacking direction of the protrusions. 3. The extrusion molding according to claim 1, wherein the inner surface of the split mold is provided with a plurality of convex portions that contact the outer edge of the concave portion and close the openings of the concave portions on the end surface. Mold.

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