JP2002035826A - Extrusion forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change wall thicknesses and dimensions (outside and inside dimensions) of a hollow member of framework by changing a configuration of an extrusion forming mouth. SOLUTION: An extrusion forming apparatus 10 comprises a No.1 die 12 wherein No.1-No.4 opening sections 18a-18d are formed and a No.2 die 14 wherein No.5-No.8 opening sections 70a-70d are formed. No.1 dies 30a-30d consisting of No.1 down dies 32a-32d and No.1 up dies 34a-34d are provided at each position in the No.1-No.4 opening sections 18a-18d and No.2 dies 80a-80d consisting of No.2 down dies 82a-82d and No.2 up dies 84a-84d are provided at each position in the No.5-No.8 opening sections 70a-70d. No.1 extrusion forming mouths 46a-46d are defined by No.1 down dies 32a-32d and No.1 dies 34a-34d and No.2 extrusion forming mouths 94a-94d are defined by No.2 down dies 82a-82d and No.2 up dies 84a-84d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion molding apparatus for extruding a work, and more particularly, to appropriately changing the dimensions (outer and inner dimensions) of the work in a direction intersecting with the extrusion direction. The present invention relates to an extrusion apparatus.

[0002]

2. Description of the Related Art In recent years, as components of various vehicles such as passenger cars and trucks, aluminum or aluminum alloy components have been widely used from the viewpoint of weight reduction and recycling of the vehicle body. Further, in order to promote weight reduction, for example, an extruded aluminum member having a hollow portion formed therein is used for a vehicle body frame.

An extrusion molding apparatus for molding an aluminum extruded profile having a hollow portion is disclosed in Japanese Patent Application Laid-Open No. Hei 8-2.
An apparatus disclosed in Japanese Patent No. 52628 is known. As shown in FIGS. 14 and 15, the apparatus includes a first die L including a pair of plate-like members J and K opposed to each other, and a first die L below the first die L. In a direction perpendicular to the axis of L, an opening P defined by a second die O composed of a pair of plate-like members M and N facing each other is continuous as it goes downward in FIG. An aluminum material S is inserted through a mandrel Q having a pyramid-shaped tapered portion having a small diameter and formed into an extrusion hole R defined by the opening P and the mandrel Q.
Is extruded by extruding a molten metal consisting of
That is, the first die L and the second die O
By pressing the aluminum material S accommodated in the container T arranged on the upper part by the stem U, the molten metal of the aluminum material S flows in the extrusion hole R,
An aluminum extruded profile V having a hollow portion is extruded. In this case, since a pyramid-shaped tapered portion having a continuously small diameter is formed on the distal end side of the mandrel Q, the degree of the distal end of the mandrel Q entering the extrusion hole R may be changed. The aluminum extruded profile V
Can be changed in thickness. Further, the distance between the pair of plate members J and K constituting the first die L (in the direction of arrow YY 'in FIG. 15) and the pair of plate members J and K constituting the second die O By changing the distance between the plate-shaped members M and N (the direction of the arrow ZZ 'in FIG. 15), the outer and inner dimensions of the extruded aluminum material V can be changed to desired dimensions. .

[0004]

However, in the extrusion molding apparatus according to the above-described conventional example, the first die L and the second die L are not provided.
When extruding the melt of the aluminum material S into the extrusion hole R defined by the die O and the mandrel Q, for example, when the aluminum material S is pressed unevenly by the stem U, ie, the entire upper surface of the aluminum material S When the load is not uniformly applied to the extruded hole R,
In this case, the mandrel Q may be displaced from the center of the extrusion hole R due to the pressing force of the aluminum material S. In this case, the dimensions of the extruded aluminum material V after the extrusion molding vary (uneven thickness), and as a result, there is a concern that the product may be defective. Moreover, when an extremely thin aluminum extruded profile V is to be formed, the distance between the first die L and the second die O and the mandrel Q is reduced as much as possible. It is pointed out that it is difficult to reliably flow the extrusion hole R.

The present invention has been made in view of such problems, and it is desirable to change the shape of the extrusion opening so that the dimensions (outer and inner dimensions) of the work can be adjusted without causing uneven thickness. An object of the present invention is to provide an extrusion molding device that can be formed into a shape.

[0006]

In order to achieve the above object, the present invention comprises a plurality of dies provided on a main body at a predetermined angle from an axial direction of the main body, wherein the dies are provided with a plurality of dies. While the extrusion opening is defined, the die is connected to driving means, and under the driving action of the driving means, the die moves in a direction intersecting the axial direction of the main body, and the extrusion opening is formed. It is characterized in that the dimensions (outer dimensions and inner dimensions) of the flowing work are changed.

[0007] Thereby, it is possible to make the dimensions (outer dimensions and inner dimensions) of the work formed by extrusion molding into a desired shape. That is, by shaping a work to a desired size, a single work can be used to extrude a work suitable for an application. Further, by changing the number of dies arranged in the mold, the cross-sectional shape can be made not only a simple shape such as a square, but also a different shape. Furthermore, since the material can be extruded without using a mandrel, it is possible to avoid as much as possible a variation in the dimensions of the work, and it is possible to form an extremely thin work.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an extrusion molding method for a hollow member according to the present invention will be described in relation to an extrusion molding apparatus for carrying out the method, and FIGS.
3 will be described in detail below. The use of this extrusion molding method is not limited, but it is preferably used, for example, to extrude a body frame of an automobile made of aluminum or an aluminum alloy.

The extrusion molding apparatus 10 according to the present embodiment
As shown in FIG. 1 and FIG. 4, it has a first mold 12 and a second mold 14 provided in parallel with the first mold 12 and coaxial with the first mold 12.

As shown in FIGS. 2 and 4, the first mold 12 has a first main body 16 having a substantially octagonal shape, and the first main body 16 cuts out each of four side end surfaces. First to fourth
Openings 18a to 18d and the back surface 2 of the first main body 16
0 to the first to fourth openings 18a to 18d. in this case,
A material flow port 24a is defined between the first opening 18a and the second opening 18b, and likewise the second opening 18b
Between the first opening 18c and the third opening 18c, between the third opening 18c and the fourth opening 18d, and between the fourth opening 18d and the first opening 18a. 24b,
24c and 24d are defined (see FIG. 2). The material flow ports 24 a to 24 d are elongated in a direction perpendicular to the axis of the first main body 16 and both ends are substantially arc-shaped, and the first main body 16 has a first arc from the back surface 20 to the front surface 29. The main body 16 extends in the axial direction and is open (see FIG. 4).

First dies 30a to 30d are disposed in the first to fourth openings 18a to 18d, respectively. The first dies 30a to 30d include first lower dies 32a to 32d slidable on the bottom surfaces of the first openings 18a to 18d, and first lower dies 32a to 32d.
And first upper dies 34a to 34d forming a pair (see FIGS. 4 and 5). This first lower die 32a-3
2d includes flat portions 36a to 36d extending in a direction orthogonal to the axial direction of the first main body 16, and projecting portions 38a to 38d extending in the axial direction of the first main body 16. The projections 38a to 38d have substantially U-shaped bent convex surfaces 40a to 40d.
40d is formed (see FIG. 5). Further, the first lower dies 32a to 32d are provided with the holes 22a to 22d.
Are formed (see FIGS. 4 and 5).

The flat portions 36 of the first lower dies 32a to 32d are opposed to the bent convex surfaces 40a to 40d.
The first upper dies 34a to 34d are slidably mounted on a to 36d (see FIG. 4). This first upper die 34a
34d are formed with bent concave surfaces 41a to 41d which are recessed in a substantially U-shape at portions facing the bent convex surfaces 40a to 40d (see FIG. 5). Since there is a space between the bent convex surfaces 40a to 40d and the wall surfaces defining the bent concave surfaces 41a to 41d, the first to fourth openings 18a to 18d are formed.
18d, the curved convex surfaces 40a to 40d, the curved concave surfaces 41a to 41d, and the first upper dies 34a to 34d.
By d, the first chambers 44a to 44d having a substantially rectangular shape are formed (see FIG. 2). That is, the material introduction port 42a
To 42d and the first chambers 44a to 44d, the first extrusion forming ports 46a to 46 for extruding the material.
d is defined.

In this case, the first lower dies 32a to 32a-3
2d is the first driving means 48a to 48d, and the first upper dies 34a to 34d are the second driving means 50a to 50d.
(See FIG. 1). The first driving means 48a to 48d are connected to the first lower die 32a.
Connecting members 52a to 52d fixed to the ends of
2d and a first threaded end of which is screwed into the internal threaded portions 53a to 53d formed inside the first connecting members 52a to 52d.
Ball screws 54a to 54d (see FIG. 4), first couplings 56a to 56d provided at the other ends of the first ball screws 54a to 54d, and connected to the first couplings 56a to 56d. First motors 58a to 58
d (see FIG. 1). Therefore, the first ball screw 5 is rotated by the rotation of the first motors 58a to 58d.
4a-54d rotate, whereby the first connecting members 52a-52d move in a direction orthogonal to the axial direction of the first main body 16. Therefore, the first connecting member 52
a to the first lower die 32a to 32d
2d is slidable on the bottom surface of the first main body 16 forming the first to fourth openings 18a to 18d.

Similarly, the second driving means 50a to 50a
d is a second connecting member 60a to 60d fixed to an end of the first upper die 34a to 34d, and an internal screw portion 61a formed inside the second connecting member 60a to 60d.
Second ball screw 62a, one end of which is screwed into 61d.
62d (see FIG. 4) and the second ball screws 62a to 62d.
Second couplings 64a to 64d provided at the other end of 2d
64d and second motors 66a to 66d connected to the second couplings 64a to 64d (see FIG. 1). Therefore, the second ball screws 62a to 62d rotate under the rotation of the second motors 66a to 66d, whereby the second connecting members 60a to 60d are moved in the axial direction of the first main body 16. Move in orthogonal directions.
Therefore, the first upper dies 34a to 34d fixed to the second connecting members 60a to 60d are slidable on the upper surfaces of the flat portions 36a to 36d of the first lower dies 32a to 32d.

The first motors 58a to 58d and the second motor
In order to secure the location of the motors 66a to 66d,
First connecting members 52a to 52d and second connecting member 60a
６０60d are separated by a predetermined interval. Also, the first driving means 48a to 48d and the second driving means 50a to 50d
Under the control of the control system, the first lower dies 32a to 32d and the first upper dies 34a to 34d slide independently or synchronously. It is free to move.

As shown in FIG. 3, the second die 14 has a rectangular second main body 68 in which a rectangular space 67 is formed at a substantially central portion. Fifth to eighth openings 70a to 70d communicating with the space 67 from the respective end surfaces
70d. The four corners of the space 67 are:
Each is formed in an arc shape having a predetermined diameter.

A pair of support members 72a to 72d separated from each other by a predetermined distance are provided so as to abut on both side walls forming the fifth to eighth openings 70a to 70d (FIG. 10).
reference). One end of each of the support members 72a to 72d has a sliding surface 76a to 76a substantially parallel to the surface 74 of the second main body 68.
76d is formed (see FIG. 6). The sliding surfaces 76a to 76d are provided in the fifth to eighth openings 70a to 70d.
Substantially plate-shaped guide members 73a to 73d are provided below the support members 72a to 72d substantially in parallel with 76d, and the guide members 73a to 73d have oval guide holes communicating with the material introduction ports 42a to 42d. 75a to 75d are formed (FIG. 6)
reference).

Further, the fifth through eighth openings 70a-70
70d includes a second die 80a including second lower dies 82a to 82d and second upper dies 84a to 84d.
To 80d (see FIG. 6). The second lower dies 82a to 82d are substantially T-shaped flat portions 86a to 86d extending in a direction orthogonal to the axial direction of the second main body 68.
And a bent portion 88 a extending in the axial direction of the second main body 68.
To 88d (see FIG. 6). The flat portions 86a-
A wide portion 86d is placed on the guide members 73a to 73d, and a narrow portion of the flat portions 86a to 86d is inserted between the pair of support members 72a to 72d, and the bent portions 88a to 88d are inserted. Are disposed in the space 67 (see FIG. 3).

In this case, the bent portions 88a to 88d are
The space 6 is divided so as to divide the space 67 substantially equally into four.
7 (see FIG. 3). further,
The wide portions of the flat portions 86a to 86d have intermediate member insertion openings 90a to 90 communicating with the guide holes 75a to 75d.
d is formed (see FIG. 6). In FIG. 4, reference numerals 91a to 91d denote gaps formed by the surface 29 of the first die 12, the support members 72a to 72d, the guide members 73a to 73d, and the second lower dies 82a to 82d. .

The sliding surfaces 76a to 76d of the support members 72a to 72d are opposed to the bent portions 88a to 88d.
The second upper dies 84a to 84d are placed on d. The second upper dies 84a to 84d are substantially L-shaped, and have a pair of substantially rectangular parallelepiped insertion portions 85a to 85d into which the support members 72a to 72d are inserted. Furthermore, inside the support members 72a to 72d, the second lower dies 82a to 82d are inserted between the insertion portions 85a to 85d.
The second elliptical second portion opposes the flat portions 86a to 86d of 82d.
Chambers 92a to 92d are formed (see FIG. 6).

A second main body 68 is provided between the bent portions 88a to 88d and the end faces of the second upper dies 84a to 84d.
The intermediate member flow ports 93a to 93d extending in the axial direction are formed (see FIGS. 3 and 4). Therefore, the intermediate member insertion ports 90a to 90d, the second chambers 92a to 92d, and the intermediate member flow ports 93a to 93d form the second extrusion molding ports 94a to 94d for extruding the material.
Is defined.

On the other hand, since the second dies 80a to 80d are respectively disposed in the fifth to eighth openings 70a to 70d, four corners of the space 67 are: First extrusion molding port 46a formed in first mold 12
Corner members 132a to 132d formed by .about.46d
Entrance ports 96a to 96d for inserting (see FIG. 8) are formed (see FIG. 3).

The second lower dies 82a to 82d
Are the third driving means 98a to 98d, and the second upper dies 84a to 84d are the fourth driving means 100a to 100d.
(See FIG. 1). The third driving means 98a to 98d are connected to the second lower die 82a.
To the third connecting members 102a to 102d
102d; third ball screws 106a to 106d (see FIG. 4), one ends of which are screwed into inner screw portions 103a to 103d formed inside the third connecting members 102a to 102d; Third couplings 108a to 108d provided at the other ends of ball screws 106a to 106d
And third motors 110a to 110d connected to the third couplings 108a to 108d (FIG. 1).
reference). Therefore, the third motors 110a to 110d
The third ball screws 106a to 106
d rotates, whereby the third connecting members 102a-102d
102d moves in a direction orthogonal to the axial direction of the second main body 68. For this reason, the third connection members 102a to 102a
The second lower dies 82a-82 fixed to 102d
d denotes the surface 29 of the first main body 16 and the guide members 73a to 73d.
It is slidable on 3d.

Similarly, the fourth driving means 100a-1
00d is a fourth connecting member 112a to 112d fixed to an end of the second upper die 84a to 84d, and internal thread portions 113a to 113d formed inside the fourth connecting members 112a to 112d. A fourth ball screw 114a-114d (see FIG. 4), one end of which is screwed into the fourth ball screw 114a-114d; a fourth coupling 116a-116d provided at the other end of the fourth ball screw 114a-114d; And fourth motors 118a to 118d connected to the four couplings 116a to 116d (see FIG. 1). Therefore,
The fourth ball screws 114a to 114d rotate under the rotation of the fourth motors 118a to 118d, so that the fourth connecting members 112a to 112d are orthogonal to the axial direction of the second main body 68. Move in the direction. For this reason, the second upper dies 84a to 84d fixed to the fourth connecting members 112a to 112d
It is slidable on sliding surfaces 76a to 76d of a to 72d.

In order to secure the arrangement positions of the third motors 110a to 110d and the fourth motors 118a to 118d, the third connecting members 102a to 102d and the fourth connecting members 112a to 112d are separated by a predetermined distance. are doing. Further, the third driving means 98a to 98d and the fourth driving means 1
00a to 100d are connected to a control system (not shown), and the second lower dies 82a to 82d are controlled by the control system.
82d and the second upper dies 84a to 84d are slidable independently or synchronously. Further, as described above, the first driving means 48a
To the second driving means 50a to 50d, the first driving means 48a to 48d, the second driving means 50a to 50d, the third driving means 98a to 98d, and the fourth driving means 100a. To 100d can be driven independently or synchronously.

The extrusion molding apparatus 10 according to the present embodiment
Basically, the configuration is as described above. Next, the operation and effects will be described.

As shown in FIG. 7, the extruder 10 is used to form a small opening 122, a large opening 124 and a thick portion 12 as shown in FIG.
An example in which the hollow member 120 made of No. 6 is extruded will be described. The hollow member 120 is extruded by a first step and a second step.

First, before the aluminum material 128 is extruded, the first dies 30a to 30d and the second
Are set to the reference state (the state shown in FIG. 4). In this case, under the control of a control system (not shown), the first motors 58a to 58d constituting the first driving means 48a to 48d are driven to drive the first connecting members 52a to 52d.
By moving 2d inside the first body 16,
The projections 38a to 38d of the first lower dies 32a to 32d are brought into contact with the front wall forming the first to fourth openings 18a to 18d. Similarly, under the control of the control system, the second motors 66a to 66d constituting the second driving units 50a to 50d
6d by driving the second connecting members 60a to 60d to the first position.
Of the first upper dies 34a to 34d and the first lower dies 32a to 3d.
The outer surface with 2d is flush (see FIG. 4).

Thereafter, the third motors 110a to 110d constituting the third driving means 98a to 98d are controlled under the control of the control system.
110d to drive the third connecting members 102a to 102
By moving d inside the second main body 68, the outer surfaces of the second lower dies 82a to 82d are flush with the outer surface of the first main body 16 (see FIG. 4). Similarly, under the control of the control system, the fourth motors 118a to 118d constituting the fourth driving means 100a to 100d are driven to move the fourth connecting members 112a to 112d inside the second main body 68. By moving, the outer surfaces of the second upper dies 84a to 84d are flush with the outer surface of the first main body 16 (see FIG. 4).

In this state, the aluminum material 128 (see FIG. 8) fixed to the stem 130 is attached to the first main body 1.
The aluminum material 128 is caused to flow through the holes 22a to 22d and the material flow ports 24a to 24d by pushing the aluminum material 128 from the back surface 20 to the front surface 29 (first step). Thereby, the meat of the aluminum material 128 flowing into the holes 22a to 22d is supplied to the material introduction port 42.
a to 42d and the first chambers 44a to 44d,
8 are extruded as substantially square-shaped corner members 132a to 132d.
And FIG. 9). Further, the material flow ports 24a to 24
The meat of the aluminum material 128 that has flowed through d is extruded as intermediate members 134a to 134d (see FIG. 8).

Further, by pushing the aluminum material 128 from the back surface 20 of the first main body 16 toward the front surface 29 by the stem 130, the four corner members 132a to 132c are formed.
132d enters the entrances 96a to 96d formed in the second die 14 communicating with the first extrusion molding ports 46a to 46d, respectively. At the same time, the intermediate members 134a to 134d
Are guide holes 75a communicating with the material flow ports 24a to 24d.
Through the second extrusion molding ports 94a to 94d through the second extrusion molding ports 94a to 94d (second step). In this case, the intermediate member 134
a to 134d are the first extruded ports 94a to 94d.
By flowing into the intermediate member insertion ports 90a to 90d constituting the 94d, and then flowing to the second chambers 92a to 92d and the intermediate member flow ports 93a to 93d, the central member 13
6a to 136d are extruded. At this time, the central members 136a to 136d are connected to the intermediate member flow ports 93a to 93d.
93d flows linearly toward the corner members 132a to 132d, and the central members 136a to 136d and the corner members 132a to 132d are press-fitted to extrude the small opening 122 of the hollow member 120. (See FIG. 8).

Next, the large opening 124 of the hollow member 120 is extruded (see FIG. 7). In this case, the first driving means 48a to 48d, the second driving means 50a to 50d, and the third driving means 98a to 98 are controlled by a control system (not shown).
d and the fourth driving means 100a to 100d are driven in synchronization with each other, so that the first lower dies 32a to 32d and the first upper dies 34a to 34d The lower dies 82a to 82d and the second upper dies 84a to 84d are moved outside the second main body 68 by a predetermined distance (see FIG. 11).

Thus, the first extrusion ports 46a to 46a-4
The positions of the 6d and the second extrusion molding ports 94a to 94d are located outside the first main body 16 and the second main body 68 as compared with the case where the small opening 122 of the hollow member 120 is extruded. (See FIG. 11). Accordingly, in this state, the aluminum material 128 is extruded in the same operation procedure as in the case of extruding the small mouth portion 122, whereby the large mouth portion 124 is extruded.

Next, the thick part 126 of the hollow member 120 is extruded (see FIG. 7). In this case, under the control of a control system (not shown), the first driving means 48a to 48d and the third
Are driven in synchronization with each other, the first lower dies 32a to 32d are placed inside the first main body 16, and the second lower dies 82a to 82d are placed in the second main body 6.
8 are respectively moved by a predetermined distance (FIG. 1
2). Thereby, the first lower dies 32a to 32d
And the position of the second lower dies 82a to 82d, compared with the case where the large opening 124 of the hollow member 120 is extruded,
It will be located radially inward of the first body 16 and the second body 68 (see FIG. 12). Therefore, in this state, the aluminum material 128 is transferred to the small opening 122 and the large opening 1.
The thick part 126 is extruded by extruding in the same operation procedure as when extruding 24.

Thereafter, the large mouth 124
The small member 122 is continuously extruded, and the hollow member 120 shown in FIG. 7 is extruded. And the hollow member 12
0 is conveyed to the next step and completed as a final product.

Next, FIG. 13 schematically shows a modification of the extrusion molding apparatus 10 according to the present embodiment. As shown in FIG. 13, an extrusion molding apparatus 200 according to this modification includes first dies 202a to 202e and second dies 204a to 204e.
4e respectively. This allows
The hollow member 120 having a substantially pentagonal cross section can be extruded.

In this embodiment, the aluminum material 128 is integrally fixed to the stem 130, but may be divided into a plurality of aluminum materials 128.

[0038]

As described above, according to the present invention,
By changing the relative position between the first lower die and the first upper die, it is possible to make the shape of the first extrusion opening into a desired shape. Similarly, by changing the relative position between the second lower die and the second upper die, it is possible to make the shape of the second extrusion opening a desired shape. Thereby, the dimensions (outer and inner dimensions) of the hollow member can also be changed, so that a single extrusion device can extrude a hollow member adapted to the intended use.

Further, by changing the number of dies arranged in the mold, it is possible to make the sectional shape not only a simple shape such as a square, but also a different shape. Is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory front view including a state in which a part of an extrusion molding apparatus according to an embodiment is broken.

FIG. 2 is a partially omitted front explanatory view showing a first mold constituting the extrusion molding apparatus in FIG. 1;

FIG. 3 is a partially omitted front explanatory view showing a second mold constituting the extrusion molding apparatus in FIG. 1;

FIG. 4 is a diagram illustrating the state of lamination of the first mold in FIG. 2 and the second mold in FIG. 3 along line IV-IV in FIG. 2 and IV-I in FIG.
It is a partially-omitted cross-sectional explanatory view seen from line V.

FIG. 5 is an exploded perspective exploded view showing a state in which a first die provided in the first mold in FIG. 2 is disassembled.

6 is an exploded perspective exploded view showing a state in which a second die arranged in a second mold in FIG. 3 is disassembled.

FIG. 7 is a partially omitted perspective explanatory view showing a state where a part of a hollow member extruded by the extrusion molding apparatus in FIG. 1 is partially cut away.

8A is a perspective view schematically showing a corner member and an intermediate member formed by a first step, and FIG. 8B is a perspective view schematically showing a hollow member formed by a second step. It is.

9 is a partially omitted perspective explanatory view showing a first step when extruding an aluminum material by the extrusion molding apparatus in FIG. 1;

10 is a partially omitted perspective explanatory view showing a second step when extruding an aluminum material by the extrusion molding apparatus in FIG. 1;

11 is a partially omitted view of the state of the first die and the second die when extruding the large opening of the hollow member in FIG. 7 as viewed from the line IV-IV in FIG. 2 and the line IV-IV in FIG. FIG.

12 is a part of the state of the first die and the second die when the thick part of the hollow member in FIG. 7 is extruded from the line IV-IV in FIG. 2 and the line IV-IV in FIG. 3; FIG.

FIG. 13 is a partially omitted front view schematically showing an extrusion molding apparatus according to a modification.

FIG. 14 is an explanatory longitudinal sectional view showing a state in which an aluminum material is extruded by an extrusion method according to a conventional example.

FIG. 15 is an explanatory plan view taken along line XV-XV in FIG. 14;

[Explanation of symbols]

10, 200: Extrusion molding apparatus 12: First mold 30a-30d, 202a-202e: First die 32a-32d: First lower die 34a-34d:
First upper dies 46a to 46d ... first extrusion molding ports 48a to 48d ...
First driving means 120: hollow member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hirota Kanda 1-10-1 Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. F-term (reference) 4E029 AA06 MB02 MB06

Claims (1)

[Claims] 1. A die having a plurality of dies provided at a predetermined angle apart from an axial direction of a main body of the main body, wherein the die has an extrusion opening and is connected to a driving means. Under the driving action of the driving means, the die moves in a direction intersecting the axial direction of the main body to change the dimensions (outer and inner dimensions) of the work flowing through the extrusion port. Characteristic extrusion molding equipment.