JP3043526B2 - Extruded products and their manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded product such as a molding or a seal member which is mounted on a ship, vehicle or building material and functions as a decoration or a seal, and a method for producing the same.

[0002]

2. Description of the Related Art In this type of extruded product, there is known an extruded product composed of a composite of an outer layer and an inner layer made of different materials such as resin and rubber.

[0003]

When the inner layer is formed of a material which is incompatible with the outer layer, the outer layer and the inner layer may be displaced or separated in the longitudinal direction. For example, when the outer layer body is formed of an ionomer resin having excellent coloring properties, weather resistance, impact resistance, and the like, and the inner layer body is formed of inexpensive PVC, the ionomer resin and the PVC are used.
The outer layer and the inner layer may be displaced or separated in the longitudinal direction due to incompatibility with the outer layer.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to couple an outer layer body and an inner layer body so as to be relatively immovable even when the outer layer body and the inner layer body are formed of incompatible materials. Accordingly, an object of the present invention is to provide an extruded product capable of preventing displacement and separation between the outer layer body and the inner layer body, and a manufacturing method capable of easily manufacturing the extruded product.

[0005]

According to a first aspect of the present invention, there is provided an extruded product comprising an outer layer and an inner layer made of different materials such as resin and rubber. Wherein, between the outer layer body and the inner layer body, a first combined body made of the same material or compatible resin or rubber as the outer layer body and integrally joined to the outer layer body, A second coupling body made of the same material or compatible resin or rubber as the inner layer body and integrally joined to the inner layer body is provided alternately in the longitudinal direction, and the first and second The outer layer body and the inner layer body are joined to each other immovably by each joint.

According to a second aspect of the present invention, there is provided a method of manufacturing an extruded product according to the first aspect of the present invention, wherein the die corresponds to a cross-sectional shape of the extruded product. In order to form an outer layer, a first material made of resin, rubber, etc., and a resin, At the same time as feeding the second material made of rubber or the like, the first material and the second material are communicated with the upstream side of the main molding path.
A third material made of the same material as the first material or a resin or rubber having compatibility with the sub-formed path having a cross-sectional shape corresponding to the cross-sectional shape of the two combined bodies; Alternatively, by alternately feeding a fourth material made of a compatible resin, rubber, or the like, an outer layer made of the first material, an inner layer made of the second material, and a first material made of the third material are formed.
By extruding the combined body and the second combined body made of the fourth material from the extrusion opening of the die, the outer layer body and the inner layer body are immovably combined by the first and second combined bodies. To produce an extruded product.

[0007]

The extruded article according to claim 1, wherein said first joined body is integrally joined to said outer layer body.
Since the outer layer body and the inner layer body are immovably connected to each other by the bonding action with the second binder integrally joined to the inner layer body, the outer layer body and the inner layer body are formed of an incompatible material. In this case, displacement and separation between the outer layer body and the inner layer body are prevented.

Further, in the extruded product according to the second aspect, in a sub-molding passage communicating with an upstream side of the main molding passage, a first joint made of a third material and a second joint made of a fourth material are provided. Are formed alternately in the longitudinal direction. Subsequently, in the main molding path, an outer layer body made of the first material and an inner layer body made of the second material are formed with the first and second combined bodies interposed therebetween, and the outer layer body is formed with the outer layer body. The first combined body is integrally joined, and the inner layer body and the second combined body are integrally joined.
Then, the outer layer body and the inner layer body are immovably coupled by the first and second coupling bodies and are extruded from the extrusion opening, whereby an extruded product is manufactured.

[0009]

【Example】

(Embodiment 1) The extruded product of Embodiment 1 of the present invention is shown in FIGS.
This will be described with reference to FIG. In FIG. 1 showing a molding as an extruded product in a perspective view, FIG. 2 showing a cross section taken along line II-II in FIG. 1, and FIG. 3 showing a cross section taken along line III-III in FIG. The outer layer body 2 and the inner layer body 4 made of resin, rubber or the like are provided in upper and lower two layers and are formed by extrusion molding.

The outer layer 2 is formed of a resin having excellent coloring properties, weather resistance, impact resistance, etc., for example, an ionomer resin, and the inner layer 4 is formed of an inexpensive resin, for example, PVC. Between the outer layer body 2 and the inner layer body 4, the first and second combined bodies 3 and 3 extend over the entire length of the outer layer body 2 and the inner layer body 4 in the longitudinal direction.
5 are alternately provided inside. These first and second coupling bodies 3 and 5 are each formed in a trapezoidal cross section having a longer upper side and a shorter lower side.

The first combined body 3 is made of the same material or compatible resin, rubber, or the like as the outer layer body 2 and is integrally joined to the outer layer body 2. The second joint body 5 is made of the same material or compatible resin, rubber, or the like as the inner layer body 4 and is integrally joined to the inner layer body 4.

The molding 1 of the first embodiment is configured as described above. Accordingly, the outer layer body 2 and the inner layer body 4 are joined together by the bonding action of the first joint body 3 integrally joined to the outer layer body 2 and the second joint body 5 integrally joined to the inner layer body 4.
Are immovably connected to each other. For this reason, the outer layer body 2
The outer layer body 2 and the inner layer body 4 can be prevented from being displaced or separated in the longitudinal direction due to the incompatibility between the ionomer resin forming the inner layer body 4 and the PVC forming the inner layer body 4.

Next, a die apparatus for extruding the molding 1 of the first embodiment will be described. First, in FIG. 4 showing a cross section of the die apparatus and FIG. 5 showing a perspective view, the front side of the die 11 has a cross-sectional shape corresponding to the cross-sectional shape of the molding 1 and is opened on the front side surface of the die 11. A main forming path 13 having an extrusion opening 12 is formed.

Inside the die 11, an inner layer body forming path 15 which communicates with the upstream side of the main forming path 13 and has a cross-sectional shape corresponding to the cross-sectional shape of the inner layer body 4 is provided above and adjacent to the forming path 15. A sub-forming path 14 having a cross-sectional shape corresponding to the cross-sectional shape of each of the first and second combined bodies 3 and 5 is formed.

The die 11 has a first material flow path 16 for guiding the first material P1 to the main molding path 13 for forming the outer layer body 2, and a second material P2 for forming the inner layer body 4. And a second material flow path 17 for guiding the fluid to the inner layer forming path 15.

Further, a third material flow path 18 for guiding the third material P3 to the sub-molding path 14 to form the first combined body 3 and a second material passage 18 for forming the second combined body 5 are formed in the die 11. A fourth material flow path 19 for guiding the four materials P4 to the sub-molding path 14 is formed.

Furthermore, the die 11 is provided with the sub-molding path 14, the third material flow path 18, and the fourth material flow path 19.
The switching shutter 20 is assembled so as to be switchable between the first and second switching positions.

The switching shutter 20 has first and second communication passages 21 and 22, respectively.
Then, as shown in FIGS. 6 to 9, the switching shutter 20
When the arrangement is switched to the first position, the third material flow path 18
Are communicated with the sub-molding path 14 by the first communication path 21, and the fourth material flow path 19 is not communicated with the sub-molding path 14,
The second communication path 22 communicates with the second discharge path 24.

Further, the switching shutter 20 is shown in FIGS.
When the arrangement is switched to the second position as shown in FIG.
The material passage 19 is communicated with the sub-molding passage 14 by the second communication passage 22, and the third material passage 18 is communicated with the first discharge passage 23 by the first communication passage 21 without being communicated with the sub-molding passage 14. It has become so.

Next, a method of manufacturing the molding 1 according to the first embodiment will be described together with the operation of the die device configured as described above. The first material flow path 16 of the die 11 includes:
A first material P1 made of an ionomer resin is sent to form the outer layer body 2.

A second material P2 made of PVC resin is sent to the second material flow path 17 to form the inner layer body 4. Further, the third material flow path 18 is made of a resin having the same material as or compatible with the first material P1, and the third material P3 is sent to form the first combined body 3; A fourth material P4 is sent to 19 to be made of the same material as the second material P2 or a resin having compatibility and to form the second combined body 5.

As shown in FIG. 6 to FIG.
Is located at the first position, the third material P3 of the third material flow path 18 flows through the first communication path 21 of the switching shutter 20 to the sub-molding path 14. Then, in the sub-molding path 14, the first combined body 3 made of the third material P3 is formed.

When a predetermined time elapses after the switching shutter 20 is placed at the first position, the switching shutter 20 is switched to the second position as shown in FIGS.
Then, the fourth material P4 of the fourth material flow path 18 flows through the second communication path 22 of the switching shutter 20 to the sub-forming path 14.
Then, in the sub-molding path 14, a second combined body 5 made of the fourth material P4 and having the same cross section as the first combined body 3 and continuous with the first combined body 3 is formed.

As described above, the first combined member 3 and the second combined member 5 are alternately formed in the sub-forming path 14 by switching the switching shutter 20 at a predetermined cycle. And
These first and second combined bodies 3 and 5 are sequentially guided to the main forming path 13. Further, the second material P2 in the second material passage 17 flows into the inner layer body forming path 15, and the second material P2
The inner layer body 4 made of the material P2 is formed and guided to the main forming path 13.

In the main molding path 13, the inner layer body 4 and the first and second combined bodies 3, 5 are vertically superposed and guided, while the first material P 1 of the first material flow path 16 is filled with the inner layer body. It flows to the main forming path 13 so as to cover the surface of the body 4 and the first and second combined bodies 3 and 5. And in the main molding path 13,
At the same time that the outer layer body 2 is formed from the first material P1,
The outer layer body 2 and the first combined body 3 are integrally joined, and the inner layer body 4 and the second combined body 5 are integrally joined.

In this way, the outer layer body 2 and the inner layer 4 are immovably joined by the first and second joint bodies 3 and 5 and are extruded from the extrusion opening 12 so as to form a long molding. 1 'is obtained. After that, the long molding 1 ′ is taken out by a take-up device (not shown) arranged in front of the die 11, and is cut into a predetermined length to form the molding 1 of the first embodiment.

When the switching shutter 20 is located at the first position, the fourth material P4 of the fourth material flow path 19 is moved to the second position of the switching shutter 20 as shown in FIG.
The liquid is guided to the second discharge path 24 via the communication path 22 and discharged to the outside of the die 11. When the switching shutter 20 is located at the second position, the third material flow path 18
As shown in FIG. 12, the third material P3 of FIG.
The die 1 is guided to the first discharge path 23 through the first communication path 21 of the die 1.
1 is discharged outside.

Second Embodiment Next, a molding 1 according to a second embodiment of the present invention will be described with reference to FIGS. In the molding 1 of the second embodiment, the inner layer body 4 is formed in a flat band shape, and the outer layer body 2 is extruded so as to surround the entire inner layer body 4. Is formed of resin, rubber or the like of different materials in the same manner as in the first embodiment. Between the outer layer body 2 and the inner layer body 4, the first and second combined bodies 3, 5 are alternately arranged in the longitudinal direction. Provided in contact with.

Further, the first joined body 3 is made of the same material or compatible resin or rubber as the outer layer body 2 and is integrally joined to the outer layer body 2. The second combined body 5 is made of the same material or compatible resin or rubber as the inner layer body 4 and is integrally joined to the inner layer body 4.

Therefore, also in the second embodiment, since the outer layer 2 and the inner layer 4 are immovably connected by the first and second connectors 3 and 5, the outer layer 2 and the inner layer 4 are longitudinally connected to each other. Position and separation can be prevented. FIG.
7 shows a cross section of a die 11 for extruding the molding 1 of the second embodiment. The main molding path 13 is formed in a cross-sectional shape corresponding to the shape of the outer layer body 2. On the upstream side of the molding path 13, the molding path 1
5 and the sub-molding path 14 are vertically arranged side by side. The other parts are the same as those in the first embodiment, and thus the same parts and members are denoted by the same reference numerals and description thereof will be omitted.

[0031]

As described above, the first aspect of the present invention is as follows.
According to the extrusion-molded product of the above, even when the outer layer body and the inner layer body are formed of incompatible materials such as resin and rubber, the outer layer body and the inner layer body are connected by the first and second combined bodies. By being immovably coupled, mutual displacement and separation can be prevented, for example, the outer layer body is formed from an ionomer resin having excellent coloring, weather resistance, impact resistance, etc.
The inner layer can be formed from inexpensive PVC having incompatibility with the ionomer resin. Claim 2
According to the method for manufacturing an extruded product according to the first aspect, the extruded product according to the first aspect can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a molding according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a cross-sectional view showing a molding die apparatus for molding.

FIG. 5 is a perspective view showing the die device.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4 in a state where the switching shutter is arranged at a first position.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 4;

FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a sectional view taken along line XX of FIG. 4 in a state where the switching shutter is arranged at a second position.

FIG. 11 is a sectional view taken along line XI-XI of FIG. 4;

FIG. 12 is a sectional view taken along line XII-XII of FIG. 4;

FIG. 13 is a sectional view taken along line XIII-XIII of FIG. 4;

FIG. 14 is a perspective view showing a molding according to a second embodiment of the present invention.

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a sectional view taken along line XVI-XVI of FIG. 14;

FIG. 17 is a cross-sectional view showing an extrusion die apparatus for molding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding (extrusion molded article) 2 Outer layer body 3 1st joined body 4 Inner layer body 5 2nd joined body 11 Die 12 Extrusion opening 13 Main molding path 14 Sub molding path 19 Shutter 20 Switching shutter

Claims (2)

(57) [Claims] 1. An extruded product comprising an outer layer body and an inner layer body made of resin, rubber or the like of different materials, wherein between the outer layer body and the inner layer body, the same material as the outer layer body or A first combined body made of a compatible resin or rubber and integrally joined to the outer layer body, and made of the same material or compatible resin or rubber as the inner layer body and integrally formed with the inner layer body; A second joint body to be joined is provided alternately in the longitudinal direction, and the outer layer body and the inner layer body are joined to each other immovably by the first and second joint bodies. An extruded product characterized in that: 2. A method for manufacturing an extrusion-molded article according to claim 1, wherein the extrusion-forming die has a cross-sectional shape corresponding to the cross-sectional shape of the extruded product and is opened on a front side surface of the die. In order to form the outer layer body, a first material made of resin, rubber, etc., and a second material made of resin, rubber, etc., for forming the inner layer body are fed to the main molding path having For a sub-molding path communicating with the upstream side of the main molding path and having a cross-sectional shape corresponding to the cross-sectional shapes of the first and second combined bodies, a resin having the same material or compatibility with the first material is used.
By alternately feeding a third material made of rubber or the like and a fourth material made of the same material or compatible resin or rubber as the second material, an outer layer made of the first material, By extruding the inner layer body made of the second material, the first bonded body made of the third material, and the second bonded body made of the fourth material from the extrusion opening of the die, the outer layer body and the inner layer body are formed. 1st, 2nd
A method for producing an extruded product, characterized by producing an extruded product which is immovably joined by the two joined bodies.