JPS615915A - Continuous extrusion of honeycomb molding and continuous extruding die used therefor - Google Patents

Abstract

PURPOSE:To obtain high-grade honeycomb molding extruded at an equal speed in spite of a slit width large or small by extruding molding material composed mainly of ceramics from a mold having flow speed adjusting pins and branch ways. CONSTITUTION:When extruding material is pushed into a die it is extruded from independent holes 13, 20 at the inlet side block 10a to the overlapped holes 16, 19 at the outlet side block 10b. Further, it goes to the internal molding grooves 14 and to the external molding grooves 22 and the honeycomb moldings are extruded continuously from the outlet side. Then, since the total area of the independent holes 13, 20 is made larger than the total area of the molding grooves 14, 22, the moldings are pressed sufficiently and extruded, and when they are extruded from the independent holes 13, 20 to the overlapped holes 16, 19, they are spread from the overlapped holes 16, 19 equally toward the vertical and longitudinal direction, stuck to each other and extended at a nearly uniform flow speed.

Description

Detailed Description of the Invention [Detailed Description of the Invention] ...J Shortcomings This invention relates to a continuous extrusion molding method for a honeycomb-shaped molded product made of ceramic or ceramic containing plastic, and a die for continuous extrusion used in the method.
In particular, the present invention relates to a molding method and an extrusion die used for molding the outer wall of the outer periphery so that the wall thickness is larger than the inner wall thickness of the inner wall.

In general, a honeycomb made of ceramic and ceramic containing plastin 2 is formed by arranging hollow core units having a square, regular hexagon, regular triangle, circle, or any other desired shape in an appropriate adjacency relationship. Because it has excellent heat resistance and corrosion resistance, and has low pressure loss due to fluid flow, it is used in catalyst carriers, heat exchangers, heat insulation materials, soundproofing materials, etc.

4. Skin Plate A continuous extrusion method as shown in FIG. 9 has been known as a method for manufacturing this type of honeycomb cells whose core units have a thin wall thickness and a small cross-sectional area. That is, a plastic composition material containing a viscosity modifier (molten clay)
The material is continuously pushed with a piston from the independent hole 1 on the material inlet side to the mesh forming groove 2 on the material outlet side as shown in Fig. 9 over a period of time sufficient for the material to be unified into a module. After drying the resulting module, it is fired to obtain a honeycomb.

As shown in FIG. 10, the honeycomb 3 manufactured by the above extrusion method usually has an outer wall 3a on the outer periphery and an inner wall 3b on the inside.
The width is made thicker to increase the strength of the outer wall.

Therefore, in the mesh forming grooves that become the honeycomb forming grooves, the width of the groove (inside the slit) on the outer periphery forming the outer wall is set larger than the width of the inner groove forming the inner wall, but the material contains a viscosity adjusting substance. Since it has viscosity, the entry throat [1
The flow velocity of the material passing through the forming groove on the outer periphery with a large diameter and the forming groove on the inside with a small slit width is different, and the flow velocity of the material passing through the forming groove on the outer periphery becomes faster. Therefore, as shown in FIG. 11, there is a problem in that the material is extruded faster from the outer peripheral forming grooves than from the internal forming grooves, resulting in the surface end of the outer wall of the honeycomb being formed protruding. Further, there was a problem that the surface of the outer wall was dull and rough.

Proboscis of the Invention This invention aims to solve the above-mentioned conventional problems, and it is possible to reduce the flow velocity of the material passing through the outer forming groove with a large slit width and the flow velocity of the material passing through the internal forming groove with a small slit width. The edges of the honeycomb, in which the outer wall is formed to be wider than the inner wall, are made to coincide with the same plane, and the formed body extruded from the outer peripheral forming groove is brought into sliding contact with the guide plate, so that the outer wall surface This is to make the surface smooth.

λ sucking:! 2. This invention has been made to achieve the object mentioned in 1.1 above, and includes an extruder that pushes a plastic composition material through an independent hole on the material inlet side of an extrusion die, and The material is extruded from the mesh-like forming grooves on the communicating material outlet side, and the slit width of the outer peripheral forming grooves among the above-mentioned mesh-like forming grooves is made larger than the inner forming grooves, and the material is extruded from the mesh-like forming grooves and formed. In a continuous extrusion molding method for a honeycomb-shaped molded product in which the outer wall is wider than the inner wall, the forming groove on the outer periphery with the width of the slit described above has at least one flow rate groove on the entrance side half communicating with the independent hole. The flow rate can be increased by interposing an adjustment pin to branch the flow path, and communicating the above-mentioned independent holes with each of the branched flow paths to branch and push the material toward the entrance side of the outer peripheral forming groove. The flow rate of the material on the wide outlet side half of the outer peripheral forming groove is set to be approximately the same as the flow rate of the material on the narrow outlet side of the other internal forming groove. The material extruded from the outer forming groove is made to come into sliding contact with the guide plate installed at the outer edge of the outlet of the outer peripheral forming groove, and the material extruded from these forming grooves makes the outer wall wider than the inner wall and has a uniform end surface. It is an object of the present invention to provide a method for continuous extrusion molding of a honeycomb-shaped molded product having a height and a smooth outer wall surface.

Furthermore, the present invention provides a metal block formed by providing independent holes in the axial direction that are mutually unique on the material inlet side, and providing a large number of mold pins with mesh-shaped molding grooves communicating with the independent holes and separated from each other on the material exit side. and a frame that is attached with a predetermined gap from the outer periphery mold pin on the material outlet side of the base, and between the frame and the outer periphery mold pin, there is a base for the outer frame with a slit width larger than the molding groove. A die for continuous extrusion of a honeycomb-shaped molded product having a molding groove on the outer periphery. A flow rate adjustment pin with a generally tapered cross section that protrudes to an intermediate position is provided, and independent holes that open on both sides of the flow rate adjustment pin are provided on the material inlet side, and on the material outlet 1 side of the bay or The frame to be fitted externally is formed so that its inner surface is spaced at a predetermined distance from the -1-registration link W4 adjustment pin and at a predetermined distance from the exit side half of the mold pin on the outer periphery, and the mold pin on the outer periphery The groove formed between the material inlet side of the mold pin and the flow rate #I4 adjustment pin, the groove formed between the flow rate adjustment pin and the frame, and the groove formed between the material outlet side of the outer peripheral mold pin and the frame. It is composed of a branch channel in which the outer circumferential molding groove for the outer wall is connected to an independent hole, and an outlet channel with a large slit width that merges the branch channel. The flow velocity of the material in the forming groove is set to be approximately the same as the flow velocity of the material on the outlet side of the outer peripheral forming groove with a large slot width, and the total cross-sectional area of the branch flow path is increased. In addition, it is an object of the present invention to provide a die for continuous extrusion of a box-shaped molded product, characterized in that a guide plate is provided along the outer edge of the outlet of the outer peripheral molding groove, on which the material to be extruded comes into sliding contact. .

EXAMPLES Hereinafter, this invention will be explained in detail with reference to examples shown in FIGS. 1 to 4.

In the figure, 10 is a bay made of a metal 10 link formed integrally with a material inlet side block 10a and a material outlet side block 10b, and 11 is externally fitted into the material outlet 1'' side block 10b of the 2 is a guide plate attached to the outlet + 111 end face of the fixed metal block, and the die for continuous extrusion of the present invention has the above-mentioned bay or 10, frame 11, and guide plate 12. It consists of

In the above-mentioned bay or ](), independent holes 13 are bored in the material inlet side block loa in the direction of the material flow axis and open at the end face on the inlet side at predetermined intervals in the vertical and horizontal directions. [Material outlet side block] Ob consists of mold pins 15 arranged in a mesh-like manner and flow velocity adjusting pins 18 arranged at predetermined intervals on the outer periphery of the mold pins 15.
, the pin 15 protrudes from the material inlet side pro 7 ri 1()a, the mold pin 15 is a square prism, and the flow rate w4 adjustment pin 18
is a diagonal prism (tapered pin). A slit 11 corresponding to the wall thickness of the honeycomb to be formed is formed by an L-shaped pin 15]
A mesh-like internal molding groove 14 having a mesh shape is provided in the material flow axis direction, and the molding groove 14 is j! 14 are communicated with the independent holes 13 of the material inlet side block. The molding groove 1
4 and the independent hole 13, as shown in the figure, a notch is provided on the entrance side of the mold pin 15 so as to have the same diameter as the independent hole 3 to form an overlapping hole 16. hole 16
The tip of the outlet side is conical. The depth T1 of the overlapping hole 16 is less than half the thickness of the hole a2.

Further, on the outer periphery of the mold pin 15 on the outer periphery, the flow rate adjusting pins 18 having a substantially triangular cross section are protruded from the material inlet side to the material outlet side at a predetermined interval.

The acute end of the pin 18 extends to approximately the middle position of the mold pin 15, and the outer base 18a of the pin 18
is a vertical plane in the axial direction, and a superimposed hole 1 having the same diameter as the independent hole 13 is provided at the inner base facing the intersection with the mold pin 15.
A cutout 18b is provided to form a cutout 9. The depth T of the overlapping hole 19 is shallower than that of the overlapping hole 16. Further, the material inlet side block 10g is provided with an independent hole 20 having a diameter equal to the outer edge line of the outer portion base 18a, and the outer half of the independent hole 20 is opened to the upper surface in the figure.

In the bay or 10 described above, the material inlet side block 10
The independent hole 13.20 of a is formed by drilling a certain depth in the axial direction from the end face on the entrance side, and the pin 15 on the material exit side.
The pin 18 is formed by cutting a groove to a certain depth in the axial direction from the end surface on the material outlet side.

The frame 11 has an A-shaped frame shape, and its inner surface is formed by slanting the lower end of the upper vertical surface 11a outward and forming an inclined surface 11b.
The lower end of the inclined surface 11b is vertically suspended to form a lower vertical surface 11c, and the lower end of the vertical surface 1c is further inclined outward to form a lower end inclined portion lid.

The frame 1 is externally fitted onto the material outlet side block lOb of the bay or 10 at a predetermined interval and fixed with bolts.

The upper vertical surface 11a of the frame 11 faces the mold pin 5 on the outer periphery at a predetermined interval, and the inclined surface 11b faces the flow rate adjusting pin 18 at a predetermined interval, and the lower vertical surface 11c The inclined surface lid faces the base portion 18a of the pin 18 at a predetermined distance, and forms an outer circumferential forming groove 22 for forming the outer wall of the outer circumferential portion of the honeycomb. The outer peripheral molding groove 22 is formed between the material inlet side of the mold pin 15 and the flow rate adjusting pin 18.
a groove 22a formed between the flow rate adjusting pin 18 and the frame 11), and a groove 221 formed between the flow rate adjusting pin 18 and the frame 11), and the outlet side of the outer peripheral mold pin 15 that merges with these grooves 22a and 22b and the frame 11. A groove 22c is formed between the grooves 22c. The branch grooves 22a, 22b are respectively communicated with the independent holes 13.2() of the material inlet side block 10a. In this way, each of the outer circumference molding grooves 22 for the outer wall has an independent hole 13.
．． 20 and a confluence path of the groove 22c. The slit width WI of the outlet side groove 22c of the outer peripheral forming groove 22 is set to be about 1.5 times larger than the slit width W2 of the internal forming groove 14, and the width W3 of the slit of the branch grooves 22a and 22b. The slits 7 to r2 are set to be substantially the same as or slightly smaller than the forming groove 14.

A guide plate 12 in the shape of a mouth frame is attached to the exit side of the frame 11 so as to stand up along the outer edge of the outer circumference forming groove 22 on the exit side. The thickness of the guide plate is the above SWAN)rlJW,
The outer surface of the material extruded from the groove 22 is set in accordance with the speed of the material extruded from the internal forming groove 14 so that it comes into sliding contact with the cold inner plate 12 without being delayed from the speed of the material extruded from the internal forming groove 14.

Next, a method for continuously forming a honeycomb-shaped molded product using the extrusion die described above will be described.

The above-mentioned extrusion die is attached to an extruder main body (not shown), and a piston (not shown) is used to press the material against the large diameter side of the material inlet side block 10a of the base 1 ().

The material is primarily made by kneading an oxide or a compound that thermally decomposes or reacts to form an oxide, or a mixture of the oxide, a plasticizer and water, which provides the desired fire resistance properties. In cases 1 and 2, the plastic composition reaches a plastic viscosity range at room temperature or by heating.

The refractory oxide mixtures include hydraulic cement, alumina, titanine, norphnia, mullite,
There are cordierite and calcined carrion. "Others" In addition to the oxides listed in item 1, catalytic substances or glass fibers,
In some cases, internal reinforcing agents such as mineral fibers are added.

In addition to bentonite and its pond water-swellable clay, examples of plasticizers used include starch, cellulose ether, and polyvinyl alcohol.

When the material listed in L is pushed into the extrusion die, it is extruded from the independent hole 13.2o of the material inlet side block 10a to the superimposed hole 16.19 of the material outlet side block 10b, and is further extruded through the internal forming groove 14 and the outer periphery forming groove. The honeycomb molded product is continuously extruded from the outlet side of the groove 22. In the above process, the total cross-sectional area of the independent hole 13.20 is reduced to the forming groove 14.2.
By making the total cross-sectional area larger than the total cross-sectional area of 2, it is pushed out while being sufficiently crimped, and the superimposed hole 16 is pushed out from the independent hole 13.2o.
．． When pushed out as one, they spread uniformly in the vertical and horizontal directions centering on the superimposed hole [6.19] and come into close contact with each other, and are pushed forward at a nearly uniform flow velocity. At this time, in the outer circumferential molding groove 22, which has a larger slit width than the internal molding groove 14 on the exit side, the independent hole 13 is replaced by the superimposed hole 1 (through J to the branch groove 22a, and the independent hole 20 to the branch groove 221).
The material is pushed forward into the branch grooves 22a and 22b, respectively.
It merges further and advances to a large merging groove 22c with a width of 7 slots. In this way, by pushing the material from the branch channel with a small slit width to the confluence channel with a larger slit width, after the material flow rate slows down in the branch channel with a small slit width, it is The flow velocity becomes faster, and on the outlet side, the material velocity in the inner forming groove 14 of the pond and the material velocity in the outer peripheral forming groove 22 become the same and are extruded. However, the material extruded from the outer peripheral forming groove 22 is extruded while the outer surface is in sliding contact with the guide plate 12.

The material extruded from the die by the method described above is
As shown in the figure, the surface edges of the outer wall 4o and the inner wall 41 are at the same height, and the outer surface of the outer wall 40 is a smooth surface.

Experimental example Titanium hydroxide obtained by hydrolyzing titanyl sulfate was
8, an aqueous solution of methyl cellulose 1008, and ceramic fiber # (trade name Fineflex 1300) 1008 were added to activated titanium oxide 2 obtained by firing at °C, and the mixture was thoroughly kneaded with a Ni-Goo to obtain a material (molten clay). The material was filled into a Blancheer embossing machine equipped with a second-grade screw, and extrusion was performed while vacuum degassing was performed. At that time, the W2 in the slit of the internal molding groove 14 of the groove is 1.4 mm, and the W1 in the slit of the merging groove 22c of the outer peripheral molding groove 22 is 2.011.
11 + W in slit of branch grooves 22a, 22b, 1°4
It is set to 1. When extruded from the die, a molded body with a wall thickness of 2.01 am on the outer periphery and a wall thickness of 1.4 mm on the inside is extruded at the same speed (1 m/min) in both the outer periphery and the inside.
) was ejected. The discharged molded body was completely free of distortions, defects, etc. The outer surface of the outer wall was smooth and shiny.

Comparative Example The same material as in the above experimental example was filled into the conventional die shown in FIG. 5 and molded.

At that time, the slits on the exit side of the internal molding groove and the outer circumferential molding groove of the die were set in the same manner as in the conventional example and the die of the present invention.

In the case of conventional dies, the material from the outer periphery was discharged faster than the inside, resulting in the outer wall protruding and being separated from the inner wall. It had a rough surface.

The present invention is not limited to the above-mentioned embodiment, but as shown in FIG. It's okay. (In the illustration, three pins 18' are provided and four grooves 22'd are provided.) Merging groove 2 of the outer peripheral molding groove 22'
If the slit of 2゛c is large, the branch groove 22゛d
Providing a large number of grooves makes it easier to adjust the speed.
4 and the material speed on the exit side of the outer peripheral forming groove 22' can be easily made the same.

As is clear from the above explanation, when continuous extrusion is performed using the die according to the present invention, the material that is pushed through the internal forming groove and the outer peripheral forming groove with different slit widths of the material outlet side block. The exit side speed can be made the same,
Therefore, the tip surfaces of the formed honeycomb can be made into the same plane.

In addition, since the material can be pushed uniformly, even if extruded at low pressure, the resulting honeycomb will not have cracks or the like, so there is an advantage that the extruder can be small. Furthermore, since the molded product discharged from the outer peripheral molding groove is brought into sliding contact with the guide plate, it has various effects such as making the surface of the outer wall a glossy and smooth surface.

The die of the present invention is also effective in extrusion molding not only ceramic plastic materials but also organic plastic materials such as plastics, Kuroiso plastic materials such as gypsum, and the like.

[Brief explanation of drawings]

Fig. 1 is a plan view of the extrusion die according to the present invention excluding the guide frame, Fig. 82 is a bottom view of Fig. 1, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 1, and Fig. 4 is a base view. , FIG. 5 and FIG. 6 are cross-sectional perspective views of main parts of FIG. 4, FIG. 7 is a schematic diagram showing an extrusion molding state of the present invention, and FIG. 18 is a schematic diagram showing another embodiment of the present invention. 9 is a sectional view of a conventional extrusion die, and FIG. 10 is a perspective view of a honeycomb to be formed.
FIG. 11 is a schematic diagram showing a conventional extrusion molding state. 10...Base, 10a...Material inlet side block, tob...Usage inlet side Bunrok, 11...Frame,
12... Guide plate, 13.20... Independent hole, ]4
...Internal molding groove, ]5...Mold pin, 16.19.
・Overlapping hole, 18...Flow rate adjustment pin, 22...Outer circumference forming groove, 22a, 22b...Branch groove, 22c・
...merging groove, 40...outer wall, 41...inner wall. Patent Applicant Tsukiyoshi Sakai Chemical Industry Co., Ltd. Manager 2 people Figure 4 Figure 5 + 4 Prefecture 10 Ward 3a Figure 11 Procedural amendment, indication of self-control case 1982 Patent Application No. 127151 2 Name of the invention: Continuous extrusion molding method for honeycomb-shaped moldings and continuous extrusion die used in the method 3 Relationship with the case concerning the person who made the amendment Patent applicant address: 5-1 Ebisujima-cho, Sakai City, Osaka Prefecture Name: Sakai Chemical Industries Co., Ltd. 4 Agent 5 Date of amendment order: Voluntary action 7, Contents of amendment I The following parts are corrected in the specification: White sugar 5, page 4, line 4 and line 18 [Replacement of 1 for outer frame] , [For exterior walls -1] (2) On page 5, lines 9 to 10, [both sides] should be corrected to [sides]. (3) After page 7, line 8 [shown in Figure 9], insert “Used a mold”. (4) Page 15, line 18 [and L slit W2-1] (5) After "14" on page 15, line 19, insert Vt'2J in the slit of [. (6) On page 16, line 19, ``1 titanine'' will be corrected to ``titania''. (7) From page 16, line 20 to page 17 @ line 1, the word ``karion'' will be corrected to ``kaolin.'' (S) Page 19, line 18, ``Figure 5 1 has been corrected to ``Figure 9.'' 1゜Figures 3, 9, and 11-1 in Figure 11 have been corrected as shown in the attached sheet. To do. I will supplement the 111 power of attorney as shown in the attached sheet. Below

Claims (4)

[Claims] (1) An extruder pushes the plastic composition material through an independent hole on the material inlet side of an extrusion die, extrudes it from a mesh forming groove on the material exit side that communicates with the independent hole, and the outer periphery of the mesh forming groove. In a continuous extrusion molding method for a honeycomb-shaped molded product, the slit width of the forming groove of the part is made larger than the inner forming groove, and the outer wall is wider than the inner wall that is extruded from the mesh-like forming groove. The molded groove on the outer periphery with a large diameter has at least one flow rate adjustment pin interposed in the half side of the entrance side communicating with the independent hole to branch the flow path, and the branched flow path is connected to the independent hole, respectively. By connecting the material to the entrance side of the outer periphery forming groove and pushing it forward, the flow velocity is suppressed from becoming faster than that at the center, and the material in the wide outlet side half of the outer periphery forming groove is The flow velocity is set to be approximately the same as the flow velocity of the material on the narrow outlet side of the other internal forming grooves, and the outer wall is wider than the inner wall due to the material pushed out from these forming grooves, and the space between the inner and outer walls is Continuous extrusion molding method for honeycomb shaped products without distortion. (2) A base made of a metal block formed by providing independent axial holes on the material inlet side and a large number of mold pins with mesh forming grooves communicating with the independent holes on the material outlet side separated from each other. and a frame attached with a predetermined gap from the outer periphery mold pin on the material outlet side of the base, and between the frame and the outer periphery mold pin there is an outer periphery molding groove for the outer wall with a slit width larger than the above molding groove. A die for continuous extrusion of a honeycomb-shaped molded product, the base having a cross section projecting from the material inlet side to the material outlet side at a predetermined interval from the mold pin on the outer periphery to approximately the middle position of the mold pin. A substantially tapered flow rate adjustment pin is provided protrudingly, and an independent hole that opens to the side of the flow rate adjustment pin is provided on the material inlet side, while a frame that is fitted externally on the material outlet side of the base is provided with an inner surface for adjusting the flow rate. A groove and a flow rate formed between the material inlet side of the mold pin on the outer periphery and the flow rate adjusting pin, which are formed at a predetermined distance from the pin and at a predetermined distance from the exit side half side of the mold pin on the outer periphery. The groove formed between the adjustment pin and the frame merged with the groove formed between the material outlet side of the outer peripheral mold pin and the frame, and the outer peripheral molding groove for the outer wall was communicated with each independent hole. It is composed of a branch flow path and an exit side flow path with a large slit width that joins the branch flow path, and the flow rate of the material in the internal molding groove with the small slit width and the flow rate of the material on the exit side of the outer peripheral molding groove with the large slit width are controlled. A die for continuous extrusion of a honeycomb-shaped molded product, characterized in that the flow velocity is set to be substantially the same as the flow rate. (3) The extruder pushes the plastic composition material through the independent hole on the material inlet side of the extrusion die, extrudes it from the mesh-like forming groove on the material outlet side that communicates with the independent hole, and the outer periphery of the above-mentioned mesh-like forming groove. In a continuous extrusion molding method for a honeycomb-shaped molded product, the slit width of the forming groove of the part is made larger than the inner forming groove, and the outer wall is wider than the inner wall that is extruded from the mesh-like forming groove. The molded groove on the outer periphery with a large diameter has at least one flow rate adjustment pin interposed in the half side of the entrance side communicating with the independent hole to branch the flow path, and the branched flow path is connected to the independent hole, respectively. By communicating the material to the entrance side of the outer periphery forming groove and pushing it forward, the flow velocity is suppressed from increasing, and the flow velocity of the material on the wide outlet side half of the outer periphery forming groove is reduced. The flow rate is set to be approximately the same as the flow velocity of the material on the narrow outlet side of the inner forming groove, and the material extruded from the outer forming groove flows through a guide plate installed at the outer edge of the outlet of the outer forming groove. A continuous extrusion molding method for a honeycomb-shaped molded product, in which the outer wall is made wider than the inner wall by the material extruded from the forming grooves, and the outer wall has a smooth outer surface without distortion between the inner wall and the outer wall. (4) A base made of a metal block formed by providing mutually independent axial holes on the material inlet side and a number of mold pins with mesh forming grooves communicating with the independent holes on the material outlet side separated from each other. and a frame that is attached with a predetermined gap from the outer periphery mold pin on the material outlet side of the base, and an outer periphery molding for the outer frame with a slit width larger than the molding groove between the frame and the outer periphery mold pin. A die for continuous extrusion of a honeycomb-shaped molded product having a groove, and the base has a mold pin protruding from the material inlet side to the material outlet side at a predetermined interval from the mold pin on the outer periphery to approximately the middle position of the mold pin. A flow rate adjustment pin with a generally tapered cross section is provided protrudingly, and independent holes that open on both sides of the flow rate adjustment pin are provided on the material inlet side, and a frame that is fitted externally on the material outlet side of the base is provided with an inner surface that allows the flow rate to be adjusted to the above-mentioned flow rate. A groove formed at a predetermined distance from the adjustment pin and at a predetermined distance from the outlet side half side of the mold pin on the outer periphery, and formed between the material inlet side of the mold pin on the outer periphery and the flow rate adjustment pin. The groove formed between the flow rate adjustment pin and the frame merges with the groove formed between the material outlet side of the outer periphery mold pin and the frame, and the outer periphery molding groove for the outer frame is made into an independent hole. It is composed of a communicating branch flow path and an outlet side flow path with a large slit width that joins the branch flow path, and the flow rate of the material in the internal molding groove with the small slit width and the flow rate of the material on the exit side of the outer peripheral molding groove with the large slit width. The flow velocity of the material is set to be approximately the same, the total cross-sectional area of the branch flow path is increased, and a guide plate is provided on which the material extruded along the outer edge of the outlet of the outer peripheral forming groove slides. A die for continuous extrusion of a honeycomb-shaped molded product.