JP3516895B2 - Method and apparatus for manufacturing molded articles by extrusion molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a molded product by extrusion molding.

[0002]

2. Description of the Related Art Conventionally, a reference mold is arranged in a molding die portion with respect to an opening portion formed on a side of an extrusion mouth of a molding die, thereby supplying a material to a molding space formed in the extrusion mouth. It is possible to extrude a molded product so as to cover the molding die portion of the reference mold by moving the molding die and the reference mold relatively, for example, Japanese Patent Laid-Open No. 4-23962.
No. 1 and Japanese Patent Laid-Open No. 4-241925. In such a method for producing a molded product by extrusion molding, a molded product is extrusion-molded by relatively moving a molding die and a reference mold while supplying a material to a molding space to cover a molding die portion of the reference mold. After that, by removing the molded product from the mold part of the reference mold, a molded product having a recessed portion corresponding to the mold part is manufactured.

[0003]

By the way, in order to extrude a molded product having an undercut portion (including a convex portion and / or a concave portion) on the inner wall surface of a concave streak portion, an undermold is formed on a molding die portion of a reference mold. When the cut molding portion is provided, it becomes difficult to remove the molded product from the molding die portion of the reference mold. In particular, it is a molded product having a non-linear portion in at least a part of its longitudinal direction, or a molded product whose cross-sectional shape changes in the longitudinal direction, or a molded product made of a hard synthetic resin material. In some cases, demolding becomes even more difficult, and the above manufacturing method may not be adopted.

In view of the above-mentioned conventional problems, an object of the present invention is extrusion capable of easily producing a molded product having an undercut portion (including a convex portion and / or a concave portion) at a required position of a concave streak portion. A method of manufacturing a molded product by molding and a manufacturing apparatus therefor.

[0005]

In order to achieve the above object, the method of manufacturing a molded article by extrusion molding according to the first aspect of the present invention has a structure as described in claim 1. Therefore, according to the first aspect of the present invention, in the extrusion step, first, the reference mold is arranged in the molding die portion with respect to the opening portion of the molding die, thereby forming a molding space in the extrusion port.
In this state, by moving the molding die and the reference mold relatively while supplying the material to the molding space, the molded product is extruded so as to cover the molding die portion of the reference mold. At this time, the mold body and the mold body can be separated
In the reference mold having the formed mold sub body, the undercut molding portion provided in the molding die portion of the mold sub body is disposed at the molding position to thereby determine the recessed portion of the molded product. An undercut portion is formed at the position. Next, in the demolding step, the undercut molding portion of the molding die portion of the reference mold is displaced to the retracted position where it is retracted from the undercut portion of the concave streak portion of the molded product. As a result, the molded product can be easily removed from the reference mold. In the demolding process, the standard type
With the mold by-product separated from the main body,
Retract the undercut part from the undercut part of the molded product
It is possible to surely displace it to the retracted position to remove the mold.

[0006] Of the molded article by extrusion molding according to the second invention
The manufacturing method is configured as described in claim 2.
It Therefore, according to the second aspect of the invention, in the demolding step, the undercut molding portion is extremely deformed by elastically deforming the mold sub-member in a state where the mold sub-member is separated from the mold main body of the reference mold. Since it is easily displaced to the retracted position, the demolding work becomes easy.

[0007] The extrusion molding according to the third aspect of the invention.
The manufacturing method of the shaped product requires the configuration as described in claim 3.
To the effect. Therefore, according to the third aspect of the invention, a step of mounting a mold sub-body on the tip portion of the reference mold body, thereby forming a molding die portion corresponding to the recessed line portion on the tip portion of the reference mold. The step of forming a molding space corresponding to the extrusion cross-sectional shape of the molding by installing the molding die portion and the molding die in a required relationship, the reference die and the molding die are relatively arranged. A step of moving the resin material to the molding space to form the molding, a step of separating the mold main body and the mold sub body, and a step of separating the molding and the mold sub body. The molding as a molded product having a convex portion and / or a concave portion on the concave streak portion of the molding body can be easily manufactured.

[0008] Of the molded article by extrusion molding according to the fourth invention
The manufacturing method is configured as described in claim 4.
It Therefore, according to the fourth aspect, it is possible to form the concave streak portion of the molded product by using the outer surface of the cross-sectional shape of the mold sub body as the molding die portion.

A molded article produced by extrusion molding according to the fifth aspect of the invention.
The manufacturing method is configured as described in claim 5.
It Therefore, according to the fifth aspect, the molding die part can be easily configured by the outer surface of the cross-sectional shape of the mold sub body and a part of the outer surface of the cross-sectional shape of the mold body.

A molded article produced by extrusion molding according to the sixth aspect of the invention.
The manufacturing method is configured as described in claim 6.
It Therefore, according to the sixth aspect, by arranging the mold sub body over the entire length of the mold part of the reference mold,
It is possible to easily form a molding die having a desired shape.

A molded article produced by extrusion molding according to the seventh aspect of the invention.
The manufacturing method is configured as described in claim 7.
It Therefore, according to the seventh aspect of the present invention, by arranging the mold by-products in a part of the reference mold forming part in the longitudinal direction, it is possible to easily form the forming mold part having a desired shape.

[0012] Of the molded article by extrusion molding according to the eighth invention
The manufacturing method is configured as described in claim 8.
It Therefore, according to the eighth aspect of the invention, it is suitable when the cross-sectional shape of the recessed portion of the molded product is formed without changing in the longitudinal direction at the portion where the mold by-product is present.

A molded article produced by extrusion molding according to the ninth aspect of the invention.
The manufacturing method is configured as described in claim 9.
It Therefore, according to the ninth invention, it is suitable when the cross-sectional shape of the recessed portion of the molded product is changed in the longitudinal direction in the portion where the mold by-product is present.

Molded product by extrusion molding according to the tenth invention
The manufacturing method of the above is configured as described in claim 10.
And Therefore, according to the tenth invention, the undercut portion (or,
The convex portion and / or the concave portion can be easily formed.

Molded product by extrusion molding according to the eleventh invention
The manufacturing method is based on the configuration as set forth in claim 11.
And Therefore, according to the eleventh invention, an elongated molding body having a substantially U-shaped cross section and an elastic seal portion projecting from at least one side wall portion of both side wall portions of the molding body. A belt molding with is manufactured.

According to the twelfth aspect of the extrusion molding,
The apparatus for manufacturing a molded article has the configuration as set forth in claim 12.
Is the gist. Therefore, according to the twelfth aspect, it is possible to easily manufacture a molded product having an undercut portion at a required position of the groove by using the apparatus for manufacturing a molded product by extrusion molding.

Molded product by extrusion molding according to the thirteenth invention
The manufacturing method according to claim 13 is configured as described in claim 13.
And Therefore, according to the thirteenth aspect of the present invention, by using the molding manufacturing apparatus by extrusion molding, the molding is formed in the elongated ridge portion of the elongated molding body having a substantially U-shaped cross section from one inner wall portion of the ridge portion. It is possible to easily manufacture the molding in which the convex portion and / or the concave portion facing the other inner wall portion is formed.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. In the first embodiment, as shown in FIGS. 9 and 10, the case where the molded product is the belt molding 11 mounted along the flange portion 2 at the upper edge of the door panel 1 is illustrated. The flange portion 2 has a step shape in which the front side is low and the rear side is high, and an inclined stepped bent portion is provided in the middle part. Furthermore, the flange portion 2 is curved inward and outward of the vehicle with a required curvature. The belt molding 11 mounted along the flange portion 2 of the door panel 1 has an inclined stepped bent portion 11a at a substantially central portion in the longitudinal direction corresponding to the flange portion 2, and corresponds to the flange portion 2 for a vehicle. Radius of curvature R required in the inner and outer directions of
It is curved at (see D in FIG. 7).

As shown in FIG. 10, the belt molding 1
1 is the molding body 12 over the entire length in the longitudinal direction.
And an inner lip 20, 21 and an outer lip 22, respectively, and are integrally formed by extrusion molding. That is, the molding body 12 is made of a hard synthetic resin material, has a recess 13 at the lower end opening, and has a substantially U-shaped cross section.
It is provided in a letter shape. Further, in the molding body 12, the upper and lower portions of the surface of one side wall portion facing the door glass among the side wall portions facing each other across the recessed portion 13 are elastically deformed and pressed against the door glass. Inner lip 2 made of an elastomeric material having, for example, a soft synthetic resin material
0, 21 are integrally provided, and the elastomer material having elasticity that abuts the door panel 1 at the lower end portion of the other side wall portion,
An outer lip 22 made of, for example, a soft synthetic resin material is provided. Further, a concave portion 18a is provided at a substantially central height position of an inner wall surface of one side wall portion of the molding body 12, and a convex portion 18b is provided below the concave portion 18a. In addition, the lower side edge of the other side wall portion has a convex portion 17a directed inward.
Is provided, and the concave portion 17b is provided above the convex portion 17a. And these convex part 17a, the recessed part 17b, the convex part 18b, and the recessed part 18a become an undercut part at the time of demolding after molding the belt molding 11.

A plurality of mounting clips 30 are inserted into the belt molding 11 at predetermined intervals in the longitudinal direction of the recess 13 of the molding body 12, and the flange of the door panel 1 is inserted through the plurality of mounting clips 30. It is mounted along the section 2. The attachment clip 30 is made of an elastic material and has an insertion portion that is inserted from above the flange portion 2. Further, a convex portion that engages with the concave portion 18a of the inner wall surface of the concave portion 13 is provided on an upper portion of one side wall portion of the attachment clip 30, and a lower end portion of the one side wall portion is elastically engaged with the flange portion 2. A locking claw 31 that fits together and a locking claw 32 that is formed into a hook shape in section and elastically engages toward the lower part of one side of the molding body 12 are provided.

As shown in FIG. 8, the belt molding 11
The manufacturing apparatus for manufacturing is equipped with an extrusion molding device 40, a reference mold 60, and a drive device 80. Extrusion molding device 4
In the molding die 50 of 0, a first material supply pipe 42 for supplying a first material for forming the molding body 12 of the belt molding 11 and inner lips 20, 21 and outer lips 22 are formed. The second material supply pipes 44 for supplying the second material are connected to each other. The first
The material supply pipe 42 and the second material supply pipe 44 are connected to different material extruders.

As shown in FIG. 1, inside the molding die 50, the first material supply passage 5 communicating with the first material supply pipe 42 is provided.
1 and a second material supply passage 52 communicating with the second material supply pipe 44.
And are provided respectively. Further, the molding die 50 is provided with an extrusion port 54 communicating with the downstream side of the first material supply path 51 and the second material supply path 52 and having a molding portion corresponding to the outer shape of the belt molding 11. The extrusion port 54 opens on the front surface of the molding die 50. Also, the molding die 5
0, the extrusion port 54 is located on the side of the molding die 50 (see FIG.
An opening 55 is provided which opens downward (toward the bottom).

The belt molding 1 is provided at the end of the reference mold 60.
The molding die portion 61 corresponding to the recessed portion 13 of the first embodiment is appropriately longer than the length dimension of the belt molding 11 (in the first embodiment, as shown in FIG. 11L and 11R are provided with a length dimension capable of molding. Then, the molding die portion 61 of the reference die 60 is inserted into the opening 55 of the molding die 50 and arranged to form a molding space corresponding to the belt molding 11. In the first embodiment, as shown in FIGS. 3 and 4, the reference mold 60 includes a mold main body 62 and a mold sub body 70 forming the molding die section 61. The mold main body 62 and the mold sub body 70 are provided separately and are engaged with each other in a detachable manner to form an integral unit. That is, the mold body 62 is made of a hard plate material such as a metal plate, a hard synthetic resin plate, and a wood-based hard board, and is curved with a required curvature corresponding to the bending of the belt molding 11 in and out. A fitting convex portion 63 having a thin tip is provided at one end edge of the mold body 62 for detachably mounting the mold sub body 70. The fitting convex portion 63 is provided with engaging concave portions 64 having a substantially concave arc shape in cross section on both side surfaces near the upper portion thereof, and the engaging convex portion 6 having a substantially convex arc shape in cross section on one side surface near the lower portion.
5 are provided.

On the other hand, as shown in FIGS. 4 to 6, the mold sub body 70 is made of a material having releasability, elasticity and heat resistance, such as silicon rubber, and is formed by extrusion molding with a constant cross section. The outer shape is the main body 1 of the belt molding 11.
It is formed in a shape corresponding to the two groove portions 13. Then, on both outer side surfaces of the mold by-product 70, a convex portion 17a as an undercut portion of the inner wall surface of the concave portion 13 of the belt molding 11,
A recess 75a, a protrusion 75b, a recess 76b, and a protrusion 76a are provided as an undercut forming portion for forming the recess 17b, the protrusion 18b, and the recess 18a, respectively. Further, the mold sub body 70 is formed with a fitting concave portion 71 having a shape that is removably fitted into the fitting convex portion 63 of the mold main body 62 and opened at the lower end of the mold sub body 70. Then, on the inner wall surface of the fitting concave portion 71, the fitting convex portion 6 of the mold body 62 is formed.
3 are provided with engaging projections 72 that are disengageably engaged with the respective engaging recesses 64, and engaging recesses 73 that are disengageably engaging with the engaging projections 65 of the fitting protruding portions 63. Has been. Further, the fitting concave portion 71 of the mold sub-body 70 is formed in a shape that is removably fitted into the fitting convex portion 63 of the mold main body 62.
In particular, as shown in FIG. 5, the mold by-product 70 has a concave portion 75 a, a convex portion 75 b, and a concave portion 7 as undercut molding portions thereof.
6b and the convex portion 76a are elastically deformed inward toward the retracted position where the convex portion 17a, the concave portion 17b and the convex portion 18b, and the concave portion 18a as the undercut portion of the belt molding 11 are retracted so as not to interfere with each other. As described above, the shape, size, etc. of the fitting recess 71 are appropriately set. That is, as shown in FIG. 5, the tips of the protrusions 75 b and the protrusions 76 a of the mold by-product 70 are the protrusions 17 a of the belt molding 11.
The mold sub body 70 is configured to be elastically deformed and displaced to a retracted position in which it is disengaged without engaging with the tip of the convex portion 18b.

In the first embodiment, as shown in FIGS. 7A to 7C, the belt molding 1 for the left side is used.
In order to continuously extrude 1L and the belt molding 11R for the right side onto the mold sub body 70, the mold sub body 70 has a mold portion corresponding to the belt molding 11L for the left side from the center to the left side from the center. On the right side, a mold portion corresponding to the right belt molding 11R is provided.

As shown in FIG. 8, the drive unit 80 is
The molding die 50 and the reference mold 60 are relatively moved on a required locus (the locus corresponding to the shapes of the left and right die parts of the die sub-body 70) based on the set program. In the first example, a robot (for example, a commercially available 6-axis control robot) 81 is used as the drive unit 80, and the reference mold 60 is controlled to move with respect to the fixed molding die 50. As shown in FIG. 8, a holding device 84 is provided on the hand portion 83 at the tip of the arm 82 of the robot 81, and the holding device 84 has a reference mold 60.
A required number of suction plates 85 for detachably holding the mold main body 62.

Next, a method for manufacturing the belt molding 11 will be described in the order of steps. First, in the extrusion molding process, as shown in FIG.
As shown in, the reference mold 60 is sucked and held by the mold body 62 by each suction plate 85 of the holding device 84 of the robot 81. At this time, the suction plate 85 is kept in a negative pressure state. In this state, as shown in FIG. 1, the forming die portion 61 (die sub body 70) of the reference die 60 is inserted from the one end side into the opening portion 55 of the forming die 50 by a required amount and installed. As a result, a molding space corresponding to the belt molding 11 is formed at the extrusion port 54 of the molding die 50. At this time, the fitting convex portion 63 of the mold main body 62 and the fitting concave portion 71 of the mold sub body 70 are fitted to each other to form a concave portion 75a, a convex portion 75b, and a concave portion 76 as an undercut molding portion of the mold sub body 70.
b, the convex portion 76a is securely held at the molding position.

On the other hand, the first material supply path 51 of the molding die 50.
The first material is supplied in a molten state from the material extruder through the first material supply pipe 42, and the second material is supplied to the second material supply path 52 from another material extruder through the second material supply pipe 44. Supplied in the molten state. As a result, the first material of the first material supply path 51 and the second material of the second material supply path 52 are respectively sent to the molding space and extruded from the extrusion port 54. Then, at a speed substantially the same as the extrusion speed of the first and second materials extruded from the extrusion port 54, the molding die section 61 of the reference die 60 is controlled to move in the extrusion direction based on a set program. As a result, the left side belt molding 11 and the right side belt molding 11 are extruded integrally and continuously on each of the left and right die parts of the forming die part 61 and separated from the opening 55 of the forming die 50 (FIG. 2).

The extrusion molding process is performed as described above, and after the left and right belt moldings 11 of the molding die section 61 are cooled and solidified, the demolding process is performed. In this demolding step, first, the engaging concave portion 64, the engaging convex portion 72, and the engaging convex portion 65 between the fitting convex portion 63 of the mold main body 62 and the fitting concave portion 71 of the mold sub body 70 are engaged. Against the engaging force with the mating recess 73, the mold body 62
The fitting convex portion 63 is forcedly pulled out from the fitting concave portion 71 of the mold by-product 70 (see FIG. 4). After that, as shown in FIG. 5, both sides of the mold by-product 70 are elastically closed toward the fitting recess 71. Then, the concave portion 75a, the convex portion 75b, and the concave portion 76 as the undercut molding portion of the mold by-product 70 are formed.
b, the convex portion 76a is a convex portion 17a as an undercut portion of the belt molding 11, the concave portion 17b and the convex portion 18b, the concave portion 1
8a is displaced to a retracted position where each retracts without interference. While maintaining this state, as shown in FIG. 6, the mold by-product 70 is pulled out from the concave streak portion 13 of the belt molding 11, and the mold releasing step is completed here.

After the demolding step is performed as a final step, a cutting step is performed. In this cutting step, as shown in FIG.
As shown in (A) to (D) of FIG.
The end portions 11b formed by protruding from both ends of 1L and 11R are cut and removed, and the boundary portions of the left and right belt moldings 11L and 11R are cut, so that the separated left and right belt moldings 11 are separated. Manufactured at the same time. Here, all the manufacturing steps of the belt molding 11 are completed.

In the first embodiment, the molding die portion 61
The mold sub body 70 constituting the mold main body 62 is made of an elastic body such as silicon rubber and has releasability and elasticity.
Of the fitting convex portion 63 and the fitting concave portion 71 of the mold by-product 70, the engaging concave portion 64, the engaging convex portion 72, the engaging convex portion 65, and the engaging concave portion 73 are substantially circular. It is formed in an arc shape. Therefore, the fitting convex portion 63 of the mold body 62 is not
When it is forcibly pulled out from the fitting recess 71 of
0 partially elastically compresses, and the engaging concave portion 64 and the engaging convex portion 72
Also, the engagement between the engagement protrusion 65 and the engagement recess 73 can be easily disengaged. As a result, the fitting convex portion 63 of the mold body 62 is moved to the mold sub body 70.
It can be easily and quickly pulled out from the fitting recess 71.

Further, the mold by-product 70 has a concave portion 75a, a convex portion 75b and a concave portion 76b, which serve as an undercut molding portion thereof.
The convex portion 76a is a convex portion 17a serving as an undercut portion of the belt molding 11, a concave portion 17b, a convex portion 18b, and a concave portion 18a.
The shape, size, etc. of the fitting recess 71 are appropriately set so that the fitting recess 71 is elastically deformed inward from the respective positions to the retracted positions. Therefore, in the demolding process, the mold by-product 70
Concave portion 75a and convex portion 75b as undercut molding portions of
Also, the concave portion 76b and the convex portion 76a are the convex portion 17a, the concave portion 17b, and the convex portion 1 as the undercut portion of the belt molding 11.
This state can be maintained by easily displacing from 8b and the recessed portion 18a to the retracted position. As a result, the concave streak portion 13 of the molding main body 12 of the belt molding 11 is not expanded and deformed, and the concave streak portion 13 is removed from the mold sub body 7
0 can be easily pulled out and demolded. In particular, when the molding body 12 of the belt molding 11 is made of a hard synthetic resin material and it is difficult to expand and deform the recessed portion 13 of the molding body 12, Convex part 17 as undercut part
Even if a, the concave portion 17b, the convex portion 18b, and the concave portion 18a are respectively molded, the mold can be easily removed.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the second embodiment, the reference type 6
The mold structure of the mold sub body 70 constituting the molding die portion 61 of 0 is modified, and the mold sub body 70 is formed of an elastic body such as silicon rubber in the same manner as in the first embodiment. It has elasticity and elasticity. As shown by the solid line in FIG. 11, the mold subsidiary body 70 is formed so as to close the fitting recess 71 in the free state, and the free state of the mold subsidiary body 70, that is, the closed state is the demolding position. There is. When the mold sub body 70 is mounted on the fitting convex portion 63 of the mold body 62, the fitting concave portion 71 of the mold sub body 70 is elastically expanded as shown by the two-dot chain line in FIG. It is fitted into the fitting convex portion 63 of the die main body 62 in the closed state. As a result, the mold sub body 70 is elastically engaged with and attached to the fitting convex portion 63 of the mold body 62 (see FIG. 12). That is, the mold body 62
The state in which the mold by-product 70 is mounted on the fitting convex portion 63 is the molding position. The other structures of the mold main body 62 and the mold sub body 70 are substantially the same as those of the first embodiment, and therefore, the same components are designated by the same reference numerals and the description thereof will be omitted.

Therefore, also in the second embodiment, the same operation and effect as those in the first embodiment can be obtained. However, in the second embodiment, the fitting concave portion 63 of the mold main body 62 and the fitting concave portion 71 of the mold sub body 70 are provided with the engaging concave portion 64, the engaging convex portion 72, and the engaging convex portion 65, respectively. It is possible to eliminate the need to provide the engaging recess 73. Therefore, the mold body 62
The fitting convex portion 63 and the fitting concave portion 71 of the mold by-product 70 can be easily removed, and when the mold by-product 70 is removed from the fitting convex portion 63 of the mold body 62, Since the mold sub body 70 is elastically restored to the original free state and then closed, the work of demolding the mold sub body 70 from the groove 13 of the belt molding 11 is facilitated.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. 13 and 14. In the third embodiment, the reference type 6
The mold structure of No. 0 is modified, and one of the mold main body 62 and the mold sub body 70 forming the main part of the molding die part 61 has one end edge of the mold main body 62 in which both sides in the plate thickness direction are formed. A support plate portion 68 that is removed and formed to have a required plate thickness dimension is provided. On the other hand, the mold sub body 70 is composed of split mold parts 70a and 70b which are divided into two parts on the left and right sides, and are detachably mounted by connecting bolts 90 with the support plate part 68 interposed therebetween. One of the split mold portions 70a and 70b has a concave portion 75a as an undercut molding portion for forming the convex portion 17a and the concave portion 17b on the inner wall surface of the concave portion 13 of the belt molding 11 in one split mold portion 70a. And convex part 75
b are provided respectively. Also, the other split mold part 7
0b is provided with a convex portion 18b on the inner wall surface of the concave streak portion 13 of the belt molding 11, a concave portion 76b serving as an undercut molding portion for forming the concave portion 18a, and a convex portion 76a, respectively. That is, in the third embodiment, the molding die portion 61 of the reference die 60 is configured by the divided die portions 70 a and 70 b which are divided into two parts on the left and right sides of the die sub body 70, and the front end surface of the support plate portion 68. .

The other structure of the third embodiment is substantially the same as that of the first embodiment. Therefore, also in the third embodiment, the left and right belt moldings 11 are simultaneously manufactured in the order of the extrusion molding step, the demolding step, and the cutting step. In the demolding step, as shown in FIG. 14, after the connecting bolt 90 is detached, the support plate portion 68 of the die body 62 is pulled out from between the split die portions 70a and 70b of the die sub body 70. In this state, both split mold parts 70 of the mold subsidiary body 70
a and 70b, the concave portion 75a, the convex portion 75b and the concave portion 7
6b and the convex portion 76a can be respectively removed from the convex portion 17a of the concave streak portion 13 of the belt molding 11, the concave portion 17b, the convex portion 18b, and the concave portion 18a to respective retracted positions. Therefore, even when the molding body 12 of the belt molding 11 is formed of a hard synthetic resin material and it is difficult to expand and deform the recessed portion 13 of the molding body 12, the recessed portion of the molding body 12 is difficult. Thirteen
Even if the convex portions 17a, the concave portions 17b and the convex portions 18b, and the concave portions 18a as the undercut portions are respectively molded, the mold can be easily released from the mold.

In the third embodiment, the split mold parts 70a, 7 divided into two parts on the left and right of the mold sub body 70 with the support plate part 68 provided on the mold body 62 of the reference mold 60 interposed therebetween.
Although the case where 0b is detachably attached by the connecting bolt 90 has been illustrated, it is also possible to attach removably by magnetic force without using the connecting bolt 90. For example, the support plate portion 68 of the die main body 62 and the split die portions 70a, 70
By disposing a permanent magnet in at least one of b and the other formed by a ferromagnetic material such as iron, the split mold parts 70a and 70b can be attached to and detached from the support plate part 68 of the mold body 62. can do.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the fourth embodiment, the case where the undercut portion is formed only on one side of the inner wall surface of the recessed portion 13 of the belt molding 11 or the like is illustrated, and the undercut portion is formed on one side of the support plate portion 68 of the mold body 62. Type die 70 is a screw,
It is detachably attached by an appropriate attachment means such as a magnet. Then, the mold part 61 of the reference mold 60 is replaced by the mold sub body 70.
And a support plate portion 68. Further, a concave portion 75a as an undercut molding portion is formed on the mold surface of the mold sub body 70.
And convex portions 75b are provided respectively. Other configurations are configured in substantially the same manner as in the third embodiment. Therefore, the fourth embodiment has substantially the same operational effect as the third embodiment. Further, in the fourth embodiment, when the undercut portion is formed only on one side of the inner wall surface of the recessed portion 13 of the belt molding 11 or the like, the mold sub body 70 is slidable with respect to the support plate portion 68 of the mold body 62. It is also possible to mount and form an undercut molding portion on the molding surface of the support plate portion 68 of the mold body 62.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIGS. In the fifth embodiment, as shown in FIG. 17, the upper edge of the flange portion 102 of the door panel 101 is substantially horizontal and extends in a straight line. On the flange portion 102a of the inner panel 101a, which is the inner side of the door panel 101, a plurality of elastic locking pieces 130 functioning as attachment clips are formed in a cut-and-raised shape at predetermined intervals in the longitudinal direction of the flange portion 102a. ing. The belt molding 111 mounted along the flange portion 102 of the door panel 101 includes the molding body 112 and the inner lip 120 over the entire length in the longitudinal direction thereof, and is integrally molded by extrusion molding. The molding body 112 is made of a hard synthetic resin material, has a recessed portion 113 having a lower end opening, and has a substantially U-shaped cross section. In the molding body 112, an elastic elastomer that is elastically deformed and press-contacted with the door glass is formed on the surface of one side wall portion facing the door glass among both side wall portions facing each other across the recessed portion 113. An inner lip 120 made of a material such as a soft synthetic resin material is integrally provided.

Further, among the inner wall surfaces of the side walls facing each other of the recessed portion 113 of the molding body 112, the lower end portion of the inner wall surface of one side wall portion has a convex portion 117a protruding toward the inner wall surface of the other side wall portion. Is provided, and a concave portion 117b is provided above the convex portion 117a. Then, these convex portions 117
a and the recess 117b are formed by molding the belt molding 111,
It becomes an undercut part when demolding. In addition, the concave line portion 1
The convex portion 117a and the concave portion 117b of the groove 13 are
13 are formed over substantially the entire length in the longitudinal direction. As shown in FIGS. 18 to 20, the mall body 11
An insertion groove 113a having a narrow groove width into which the flange portion 102 of the door panel 101 is inserted is provided above the second concave portion 113.
And extension grooves 113b having a groove width substantially the same as the groove width of the concave portion 113 and avoiding interference with the elastic locking piece 130 of the flange portion 102a are alternately formed in the longitudinal direction. The belt molding 111 is configured such that the groove portion 113 of the molding body 112 is inserted from above the flange portion 102 of the door panel 101, so that the door panel 101 is closed.
It is adapted to be attached to the flange portion 102.

In FIG. 2, which is a perspective view of the reference mold 160 having the mold part 161 corresponding to the belt molding 111, the mold sub body 170 is screwed to one side of the support plate part 168 of the mold body 162. It is detachably attached by an appropriate attachment means such as a magnet. That is, also in the fifth embodiment, the reference mold 1 is almost the same as the fourth embodiment.
The molding die part 161 of 60 includes the mold sub body 170 and the support plate part 168.
It is composed by. Further, on the mold surface of the mold subsidiary body 170, the concave portion 17 as an undercut molding portion for forming the convex portion 117a and the concave portion 117b over substantially the entire length in the longitudinal direction of the concave portion 113 of the molding body 112 is formed.
5a and the convex portion 175b are provided continuously over substantially the entire length of the molding die portion 161. Further, molding for forming the insertion groove 113a and the extension groove 113b in the upper part of the concave portion 113 of the molding body 112 in the upper part of the mold plate of the support plate part 168 of the mold main body 162 and the upper part of the mold surface of the mold sub body 170. Portions 161a and 161b are formed alternately in the longitudinal direction.

Therefore, in the fifth embodiment,
In the extrusion molding step, the reference mold 160 is held on the mold body 162 thereof by the holding device of the robot (similar to the first embodiment). In this state, the standard type 16
The support plate portion 168 and the mold sub-body 170 that form the molding die portion 161 of 0 are inserted into the molding die 150 from one end side thereof and installed. As a result, the molding die 150
A molding space corresponding to the belt molding 111 is formed at the extrusion port of (see FIGS. 22 and 23). Then, while the molding material (resin material) is being supplied to the molding die 150, the movement of the molding die portion 161 of the reference mold 160 is controlled based on the set program. As a result, the belt molding 111 is extruded in a straight line on the molding die 161 (see FIG. 24). In the fifth embodiment,
The area of the cross section of the belt molding 111 changes in the longitudinal direction, that is, the cross section changes at the portion of the insertion groove 113a and the extension groove 113b in the upper portion of the recess 113 of the molding body 112. Therefore, the supply amount of the molding material is changed in accordance with the change in the cross-sectional area of the belt molding 111, or the relative moving speed of the reference mold 160 and the molding die 150 is changed to change the molding material. It is desirable to prevent molding defects caused by excess and deficiency.

The extrusion molding process is performed as described above, and after the belt molding 111 is cooled and solidified, the demolding process is performed. In this demolding step, first, as shown in FIG. 25, the support plate portion 168 of the mold body 162 and the mold subsidiary body 17 are removed with the mounting means for the mold body 162 and the mold subsidiary body 170 removed.
The support plate portion 168 of the mold body 162 is pulled out from the recessed portion 113 of the molding body 112 while 0 and 0 slide with each other. Then, as shown in FIG.
175a and projections 17 serving as undercut molding parts of
5b is moved to a state in which it does not interfere with the convex portion 117a and the concave portion 117b as the undercut portion of the belt molding 111 (retracted position), and the mold sub-body 170 is pulled out from the concave streak portion 113 of the belt molding 111. This completes the demolding process.

After the demolding step is performed as a final step, a cutting step is performed to complete the manufacturing process of the belt molding 111. As described above, also in the fifth embodiment, even when it is difficult to expand and deform the groove portion 113 of the molding body 112 of the belt molding 111, By forming the convex portions 117a and the concave portions 117b as the undercut portions over substantially the entire length in the longitudinal direction, it is possible to easily remove the mold.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to FIGS. In the sixth embodiment, as shown in the drawings and the drawings, a convex portion 117a and a concave portion 117b as an undercut portion are provided on one of the inner wall surfaces of the groove portion 113 of the belt molding 111 which face each other. , The same groove 1
An example is shown in which a part is formed in a part of 13 in the longitudinal direction or is intermittently formed with a predetermined interval in the longitudinal direction. Then, the molding main body 112 is detachably mounted on one side of the support plate portion 168 of the mold body 162 by an appropriate mounting means such as a screw or a magnet, and the molding body 112 is attached to the mold surface.
The concave portion 17 as an undercut molding portion for forming the convex portion 117a and the concave portion 117b of the concave streak portion 113, respectively.
5a and the convex portion 175b are partially provided in a part of the molding die portion 161 in the longitudinal direction, or intermittently provided at a predetermined interval in the longitudinal direction.

Therefore, also in the sixth embodiment, in the extrusion molding step, the reference mold 160 is held on the mold body 162 thereof by the holding device of the robot (similar to the first embodiment). In this state, the supporting plate portion 168 and the mold sub-body 170 that form the molding die portion 161 of the reference mold 160 are inserted into the molding die 150 from the one end side and installed in a required amount. As a result, the molding die 1
A molding space corresponding to the belt molding 111 is formed at the extrusion port of 50 (see FIGS. 28 and 29). Then, while supplying the molding material to the molding die 150, the movement of the molding die portion 161 of the reference die 160 is controlled based on the set program. As a result, the belt molding 111 is extruded in a substantially straight line on the molding die 161 (see FIG. 2).
7). In addition, in the sixth embodiment, the convex portion 117a and the concave portion 117 of the concave streak portion 113 of the molding body 112.
The cross section changes at the portion of b. For this reason,
Also in the sixth embodiment, the amount of the molding material supplied is changed according to the change in the cross-sectional area of the belt molding 111, or the relative moving speed between the reference mold 160 and the molding die 150 is changed. It is desirable to prevent defective molding due to excess or deficiency of molding material.

As described above, the extrusion molding process is performed, and after the belt molding 111 is cooled and solidified, the demolding process is performed. In this demolding step, first, in substantially the same manner as in the fifth embodiment, the support plate portion 168 of the mold body 162 and the mold subbody 170 are removed with the mounting means for the mold body 162 and the mold subbody 170 removed. While and slide with each other, mold body 1
The support plate portion 168 of 62 is the recessed portion 11 of the molding body 112.
Pulled out from 3. After that, the concave portion 175a and the convex portion 175b as the undercut molding portion of the mold by-product 170 are replaced with the convex portion 117a as the undercut portion of the belt molding 111.
And recessed portion 117b without interference (retracted position)
The mold sub-body 170 is pulled out from the concave streak portion 113 of the belt molding 111 while being moved to, thereby completing the demolding process.

After the demolding step is performed as a final step, a cutting step is performed to complete the manufacturing process of the belt molding 111. As described above, according to the sixth embodiment, the recessed portion 1 of the molding body 112 of the belt molding 111.
Even when it is difficult to expand and deform 13, the convex portion 117a serving as an undercut portion is provided at a part of the concave portion 113 of the molding body 112 in the longitudinal direction or at a predetermined interval in the longitudinal direction. Thus, the recess 117b can be partially or intermittently formed and easily released from the mold.

(Seventh Embodiment) Next, a seventh embodiment of the present invention will be described with reference to FIGS. In the seventh embodiment, as shown in FIG. 30, a convex portion 117a and a concave portion 117b as an undercut portion are formed on the inner wall surface of the concave portion 113 of the molding body 112 of the belt molding 111 which faces the concave portion. Part 11
An example is shown in which a part of the film 3 is partially formed in the longitudinal direction or is intermittently formed at a predetermined interval in the longitudinal direction.
The reference mold 160 includes a mold body 162 and a plurality of required lengths (short lengths) detachably mounted on a part of one end edge of the mold body 162 in the longitudinal direction or at a predetermined interval in the longitudinal direction (short length). In FIG. 30, three die by-products 170 are provided. The forming die portion 161 of the reference die 160 has a first forming portion 161a formed directly on one end edge of the die body 162.
And the second molding portion 16 formed on the plurality of mold sub-members 170.
1b and 1b are alternately provided in the longitudinal direction.

That is, the mold body 162 is formed of a hard plate material such as a metal plate, a hard synthetic resin plate, and a wood-based hard board, and the first molding die portion 161a having a narrow tip in the longitudinal direction of one end edge thereof. , And fitting protrusions 163 having a narrowed tip for mounting the plurality of mold sub-members 170 in a detachable manner, are alternately provided in the longitudinal direction. The fitting convex portions 163 are provided with engagement concave portions 164 having a substantially arcuate cross section on both side surfaces near the upper portion thereof.

On the other hand, the mold sub-body 170 is made of a material having releasability, elasticity and heat resistance, such as silicon rubber. Then, a second member is formed on the outer surface of the plurality of mold sub-objects 170.
Molded portions 161b are respectively formed, and concave portions 175a and convex portions 175b as undercut molded portions are provided on both outer side surfaces of the second molded portions 161b, respectively. In addition, the plurality of mold sub-assemblies 170 are formed with fitting recesses 171 having a shape that is releasably engaged with the respective fitting protrusions 163 of the mold body 162, and are opened at the lower ends of the mold sub-assemblies 170. . The mold body 16 is provided on the inner wall surface of the fitting recess 171.
Engagement protrusions 172 that engage with the engagement recesses 164 of the two fitting protrusions 163 in a disengageable manner are provided. Further, the fitting concave portion 171 of the mold sub-body 170 is formed in a shape that is removably fitted into the fitting convex portion 163 of the mold body 162. Further, in the mold by-product 170, the concave portion 175a and the convex portion 175b as the undercut molding portion are the convex portion 117a as the undercut portion of the belt molding 111.
The shape, size, etc. of the fitting concave portion 171 are appropriately set so that the fitting concave portion 171 is elastically deformed inward from the concave portion 117b to the retracted position where the concave portions 117b are retracted so as not to interfere with each other. That is, as shown in FIG. 34, the tip portion of the convex portion 175 b of the mold by-product 170 is the convex portion 1 of the belt molding 111.
The mold sub-body 170 is configured so as to be elastically deformed and displaced to a retracted position where it is disengaged without engaging with the tip of the 17a.

Therefore, also in the seventh embodiment, in the extrusion molding step, the reference die 160 is held by the die main body 162 by the holding device of the robot (similar to the first embodiment). In this state, the molding die portion 161 of the reference mold 160 is moved from one end side thereof to the molding die 15
It is installed by inserting the required amount into 0. As a result, a molding space corresponding to the belt molding 111 is formed at the extrusion port of the molding die 150 (see FIGS. 31 and 32). Then, while supplying the molding material to the molding die 150, the movement of the molding die portion 161 of the reference die 160 is controlled based on the set program. As a result, the belt molding 111 is linearly extruded on the molding die 161. In addition, also in this Embodiment 7, the reference type 1
The cross section of the belt molding 111 changes between the first molding portion 161a and the second molding portion 161b of the molding die portion 161 of 60. Therefore, the supply amount of the molding material is changed according to the change of the cross-sectional area, or the reference mold 1 is used.
It is desirable to prevent the defective molding caused by the excess and shortage of the molding material by changing the relative moving speed of the molding die 150 and the molding die 150.

As described above, the extrusion molding process is performed, and after the belt molding 111 is cooled and solidified, the demolding process is performed. In this demolding step, first, in substantially the same manner as in the first embodiment, first, the engaging force between the fitting convex portion 163 of the mold body 162 and the fitting concave portions 171 of the plurality of mold sub-members 170 is resisted. Then, the fitting convex portion 163 of the mold body 162 is formed into a plurality of mold sub-members 17.
It is forcibly pulled out from each of the 0 fitting recesses 171 (see FIG. 33). After that, as shown by the chain double-dashed line in FIG.
Elastically closed towards. Then, the concave portion 175a and the convex portion 175 as the undercut molding portion of the mold by-product 170 are formed.
The b is displaced from the convex portion 117a and the concave portion 117b as the undercut portions of the belt molding 111 to the retracted position where they retract without interference. Keeping this state, as shown by the solid line in FIG. 34, the belt molding 111
The mold by-product 170 is pulled out from the concave streak 113, and the demolding process is completed here.

After the demolding step is performed as a final step, a cutting step is performed to complete the manufacturing process of the belt molding 111. As described above, in the seventh embodiment, the recessed portion 1 of the molding body 112 of the belt molding 111.
Even when it is difficult to expand and deform 13, the protrusions 117a and the recesses 117 serving as undercut portions are formed in a part of the groove portion 113 of the molding body 112 in the longitudinal direction.
b can be easily formed by partially or intermittently forming a required space (including a constant space or a different space) in the longitudinal direction. Further, in the seventh embodiment, the mold 161 of the reference mold 160 (the mold main body 162 in this case) is detachably mounted at a predetermined interval (including a constant interval or a different interval) in the longitudinal direction. A plurality (three in FIG. 30) of mold by-products 170 may have the same shape, or mold by-products 170 having different shapes may be used respectively. For example, the arrangement positions and cross-sectional shapes of the concave portions 175a and the convex portions 175b as the undercut molding portions of the mold sub-body 170a in the central portion of FIG. It can be formed differently from the mold by-product 170 (two-dot chain line in FIG. 30).

The present invention is not limited to the first to seventh embodiments. For example, the first to fourth embodiments
In the above, an example is shown in which a belt molding 11 having an inclined stepped bent portion 11a at a substantially central portion in the longitudinal direction and curved at a required radius of curvature R in an inner and outer direction of the vehicle is formed. In the fifth to seventh embodiments, the case where the belt molding 111 having a substantially straight line shape in the longitudinal direction is formed is illustrated, but the present invention is not limited thereto. For example,
As shown in FIG. 35, a bent portion (including a stepped portion in the horizontal direction, the height direction, etc., a curved portion, an arc portion, a bent portion, etc.) 211 a is provided in a part of the longitudinal direction, and at least the concave streak portion 213 is provided. A convex portion 217a and a concave portion 21 as an undercut portion are partially formed.
It is also possible to form the belt molding 211 having 7b.

Further, as shown in FIG. 36, the mold heating step,
It is desirable to manufacture a molded article such as the belt molding 11 (or 111) in the order of the extrusion molding step, the cooling step, and the demolding step. In particular, the mold part 61 of the reference mold 60 (or 160)
(Or 161) is composed of the metal mold body 62 (or 162) and the metal mold sub body 70 (or 170), the reference mold 60 (or 16) is used in the mold heating step.
0) at least the mold part 61 (or 161) approaches the melting temperature of the resin material (for example, a thermoplastic synthetic resin material such as vinyl chloride) of the molded product (for example, 60 ° C. to 1).
It is desirable that the extrusion molding step be performed after heating to a temperature of 00 ° C.). That is, the belt molding 11 is omitted in the order of the extrusion molding step, the cooling step, and the demolding step, omitting the mold heating step.
Molded articles such as (or 111) can also be manufactured. However, if the mold heating step is omitted, the belt molding 1
Molded articles such as 1 (or 111) can be produced by the reference mold 60 (or 16) in the extrusion molding step, immediately after that, or in the cooling step.
The molding die portion 61 (or 161) of 0) abruptly removes the heat of the resin material of the molded product, and the molded product such as the belt molding 11 (or 111) is cooled and shrunk in the peripheral portion of the concave streak portion. Then, as shown by the chain double-dashed lines in FIGS. 37 and 38, the shrinkage causes the belt molding 1
A molded product such as 1 (or 111) may be contracted and deformed in the longitudinal direction, or the cross-sectional shape may be unexpectedly changed, resulting in a defective product. Therefore, before the extrusion molding step, in the mold heating step, at least the mold portion 61 (or 161) of the reference mold 60 (or 160) is heated to a temperature close to the melting temperature of the resin material of the molded product, After that, by performing an extrusion molding step, it is possible to prevent the occurrence of defective products due to material shrinkage.

Molding part 61 of the reference mold 60 (or 160)
The heating of (or 161) can be performed by external heating with a heating device or the like, or the mold body 62 (or 162).
It is also possible to provide a heater in at least one or both of the mold sub body 70 (or 170) and heat them. Further, in the cooling step before the demolding step, the cooling time can be shortened compared to natural cooling by positively cooling the molded product such as the belt molding 11 (or 111) using a cooling fan or the like. It will be possible. The cooling step can be started immediately after the resin material is extruded into the molding die portion 61 (or 161) of the reference die 60 (or 160), or can be performed by natural cooling. Also,
Although the case where the cutting step is performed after the demolding step is described in the first to seventh embodiments, the cutting step may be performed in the preceding step of the demolding step. When the cutting process is performed in the preceding step of the demolding process, the reference mold 60
(Or 160) of the molding die portion 61 (or 161) keeps the shape of the concave portion of the molded product such as the belt molding 11 (or 111) in the cross section during extrusion molding. For this reason,
Molding part 61 (or 16) of the reference mold 60 (or 160)
1) The belt molding 1 protruding from both ends in the longitudinal direction of 1).
Easily cut with a cutter etc., the cut parts formed by extending at both ends of the molded product such as 1 (or 111)
To be done. In this case, longitudinal ends of the mold part 61 (or 161) of the reference type 60 (or 160) against the cutter
That received the blade. Therefore, the belt molding 11 (or 1
The cut surfaces of both end portions of the molded product such as 11) also look good.

Further, in the first to seventh embodiments, the case where the outer shape of the cross section of the belt molding 11 (or 111) is formed to be substantially constant without changing in the longitudinal direction has been exemplified, but the present invention is not limited to this. Not a thing. For example, it is possible to dispose the movable die so as to be able to move forward and backward with respect to the extrusion opening of the molding die 50 (or 150) and change the cross-sectional shape of the extrusion opening by the movable die. In this case, the belt molding 1
1 (or 111) inner lip 20, 21 (or 12)
0) and the overhanging length of the outer lip 22 to the belt molding 1
1 (or 111) can be changed in the longitudinal direction for extrusion molding. Changing the cross-sectional shape of such a molded product is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 5-178088 and 7-32875.

In addition, in the first to seventh embodiments, the seal portion is formed on at least one side wall portion of the inner and outer side wall portions of the belt molding 11 (or 111) or on each side surface of the both side wall portions. Inner lip 20, 21 (or 120) and outer lip 22 having a cross-section lip shape as
However, the present invention is not limited to this. For example, as shown in FIG.
And a concave portion 313 formed in a letter shape and the concave stripe portion 313.
In a belt molding 311 having a molding body 312 in which a convex portion 317a as an undercut portion and a concave portion 317b are formed in at least a part of the longitudinal direction of the molding material, at least one of the side wall portions 312a and 312b of the molding body 312 is A seal portion 321 having a hollow annular cross section may be formed on the side surface of the side wall portion 312b. In this case, the seal part 3
It is desirable that 21 is made of an elastomer material (including a sponge body) having high elasticity.

In addition, although the case where the molded product is the belt molding 11 (or 111) has been illustrated in the first to seventh embodiments, as shown in FIG. 40, an undercut to be mounted in a concave portion of a roof panel of a vehicle. Roof molding with parts 4
Even if it is 11, it is possible to manufacture. Furthermore, as shown in FIG. 41 (A), the planar shape of the roof molding 411 can be formed into a required curved shape, and further, as shown in FIG. 41 (B), the roof molding 411 can have a curved shape. It is also possible to form the side surface into a required curved shape. That is, in the molded product extruded so as to cover the molding die portion 61 (or 161) of the reference die 60 (or 160), the groove portion 13 (or 131) formed by the molding die portion 61 (or 161). It is possible to manufacture any molded product as long as it is a molded product having an undercut portion in (4).

Further, in the first to seventh embodiments,
Although the reference mold 60 (or 160) is moved in the three-dimensional direction by the robot 81 as the driving device 80 with respect to the fixed molding die 150, the invention is not limited to this. For example, the reference die 60 (or 160) is fixed to an appropriate fixing base, and the molding die 50 (or 15) is fixed to the reference die 60 (or 160).
0) may be moved by a driving device. Further, the molding die 50 (or 150) and the reference mold 60 (or 160)
And may be moved by different driving devices.
In this case, it becomes possible to easily form a curved portion having a small radius of curvature in a part of the molded product.

[0062]

As described above, according to the present invention,
It is possible to easily manufacture a molded product having an undercut portion (including a convex portion and / or a concave portion) at a required position of the concave streak portion.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a relationship between a molding die according to Embodiment 1 of the present invention and a molding die portion of a reference mold.

FIG. 2 is an explanatory view showing a state in which a belt molding as a molded product is also extrusion-molded along a molding die portion of a reference mold.

FIG. 3 is a transverse cross-sectional view showing a state in which a belt molding is extruded on a reference mold.

FIG. 4 is a transverse cross-sectional view showing a state in which the mold sub body is pulled out from the mold body of the reference mold and separated.

FIG. 5 is a cross-sectional view showing a state in which the concave portion and the convex portion as the undercut molding portion are displaced to the retracted position by elastically deforming the mold sub body.

FIG. 6 is a transverse sectional view showing a state where the belt molding is released from the mold sub body.

FIG. 7 is an explanatory diagram showing a process in which the left and right belt moldings that are similarly extrusion-molded into a continuous shape are cut and the left and right belt moldings are manufactured simultaneously.

FIG. 8 is a perspective view showing a simplified relationship between a forming die, a reference die, and a robot as a driving device.

FIG. 9 is an explanatory view showing a state in which a belt molding is also attached to a flange portion of the door panel.

FIG. 10 is a sectional view taken along line XX of FIG.

FIG. 11 is a transverse cross-sectional view showing a mold by-product according to Embodiment 2 of the present invention.

FIG. 12 is a cross-sectional view showing a state in which the mold sub body is mounted on the mold body.

FIG. 13 is a transverse cross-sectional view showing a state in which a split mold part of a mold sub body, which is divided into two, is attached to a support plate part of a mold body of a reference mold according to Embodiment 3 of the present invention.

FIG. 14 is a transverse cross-sectional view showing a state in which the support plate portion of the reference mold body and the split mold portion of the mold sub body are separated from each other.

FIG. 15 is a cross-sectional view showing a mold by-product of Embodiment 4 of the present invention.

FIG. 16 is a cross-sectional view showing a state in which a mold by-product is mounted on the mold body.

FIG. 17 is a perspective view showing a state in which a flange portion and a belt molding of the door panel according to the fifth embodiment of the present invention are separated.

FIG. 18 is a transverse cross-sectional view taken along line XVIII-XVIII in FIG. 17, showing a state in which the undercut portion of the belt molding is engaged and attached to the elastic locking piece of the flange portion of the door panel.

FIG. 19 is a transverse sectional view based on line XIX-XIX in FIG. 17, showing a state where the upper end of the flange portion of the door panel is also inserted into the insertion groove of the recessed portion of the belt molding.

20 is a plan sectional view taken along line XX-XX of FIG. 18.

FIG. 21 is a perspective view showing the relationship between the main body of the reference mold and the mold sub body that constitutes the mold part of the reference mold.

FIG. 22 is a transverse cross-sectional view taken along line XXII-XXII in FIG. 21, showing a state in which a belt molding has been extrusion-molded on the molding die portion of the reference mold.

23 is a XXIII-XXII of FIG. 21 showing a state where the belt molding is extruded on the molding die of the reference die.
It is a cross-sectional view based on the I line.

FIG. 24 is a plan sectional view taken along line XXIV-XXIV in FIG. 22, showing a state in which the belt molding is extrusion molded on the molding die portion of the reference mold.

FIG. 25 is a transverse cross-sectional view showing a state in which the mold body and the mold sub body are slid from each other and separated from each other.

FIG. 26 is a transverse cross-sectional view showing a state where the belt molding is released from the mold sub body.

FIG. 27 is a perspective view showing the relationship between a mold main body, a mold sub body, and a belt molding of a reference mold according to Embodiment 6 of the present invention in a separated manner.

FIG. 28 is a view XXVIII-XXV of FIG. 27 showing a state in which a belt molding is extrusion-molded on the molding die portion of the reference die.
It is a cross-sectional view based on the line III.

FIG. 29 is a transverse cross-sectional view taken along line XXIX-XXIX in FIG. 27, showing a state in which the belt molding is extrusion-molded on the molding die part of the reference die.

FIG. 30 is a perspective view showing the relationship between a mold main body of a reference mold, a plurality of mold sub-assemblies, and a belt molding separately according to Embodiment 7 of the present invention.

FIG. 31 is a transverse cross-sectional view taken along line XXXI-XXXI of FIG. 30, showing a state in which a belt molding is extrusion-molded on the molding die portion of the reference mold.

FIG. 32 is a XXXII-XXXI of FIG. 30 showing a state in which the belt molding is extrusion-molded on the molding die portion of the reference die.
It is a cross-sectional view based on the I line.

FIG. 33 is a transverse cross-sectional view showing a state in which the mold sub body is pulled out from the mold body of the reference mold and separated.

FIG. 34 is a transverse sectional view showing a state where the belt molding is released from the mold sub body.

FIG. 35 is a perspective view showing a belt molding having a bent portion in a part that can be molded according to each embodiment of the present invention.

FIG. 36 is an explanatory view showing a step of manufacturing the belt molding by heating the molding die of the reference mold to a required temperature before extrusion molding the belt molding on the molding die of the reference mold in each embodiment of the present invention. It is a figure.

FIG. 37 is an explanatory view showing a belt molding manufactured in a state in which the molding die portion of the reference mold is heated to a required temperature before extrusion molding the belt molding on the molding die portion of the reference mold.

38 is also XXXVIII-XXXVI of FIG.
It is a cross-sectional view based on the II line.

FIG. 39 is a cross-sectional view showing a belt molding that can be manufactured by the manufacturing method of the present invention.

FIG. 40 is a perspective view showing a roof molding that can be manufactured by the manufacturing method of the present invention in a cutaway manner.

FIG. 41 is an explanatory view showing the roof molding from the same plane and side, respectively.

[Explanation of symbols]

11,111 Belt molding (molded product) 13, 113 concave section 17a, 117a, convex portion (undercut portion) 17b, 117b Recessed portion (undercut portion) 18a, 118a, concave portion (undercut portion) 18b, 118b Convex part (undercut part) 50,150 Molding die 60, 160 Standard type 61, 161 Mold part 62, 162 type body 70,170 type by-products 75a, 175a Recessed portion (undercut molding portion) 75b, 175b Convex part (undercut molding part) 76a, 176a Convex part (undercut molding part) 76b, 176b Recessed portion (undercut molding portion) 80 Drive 81 robot

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 47/00-47/96

Claims (13)

(57) [Claims] 1. A reference die is disposed in a molding die portion with respect to an opening portion formed in an extrusion opening of the molding die, whereby the molding die and the molding die are supplied while supplying a material to a molding space formed in the extrusion opening. An extrusion step of extruding a molded product so as to cover the mold part of the reference mold by relatively moving the reference mold, and by releasing the molded product from the mold part of the reference mold, A method of manufacturing a molded product, comprising: a mold releasing step of manufacturing a molded product having a recessed portion corresponding to the mold portion, wherein the reference mold is configured to be separable from the mold body and the mold body.
And a made the type sub-body, undercut molding portion is provided at a predetermined position of the mold portion of the mold auxiliary body in the extrusion step, that the undercut molding portion is arranged in the molding position By molding an undercut portion at a predetermined position of the recessed portion of the molded product, and in the demolding step, is displaced to a retreat position where the undercut molding portion retreats so that the undercut molding portion does not interfere with the undercut portion. is the demolding the molded article by the fact, in the demolding step, the mold auxiliary body relative to the mold body
The undercut molding part is displaced to the retracted position in the separated state
A method for producing a molded article by extrusion molding, comprising: 2. A method of manufacturing a molded article by extrusion molding according to claim 1, wherein the undercut molding part of the molding die part is displaced to the retracted position by elastically deforming the mold sub body. A method for producing a molded article by a characteristic extrusion molding. 3. A convex section and / or a concave section extending from one inner side wall of the concave section to the other inner side wall is formed in the concave section of the elongated molding body having a substantially U-shaped cross section. A method of manufacturing a molding, wherein a mold sub body is attached to a tip portion of a reference mold body, thereby forming a molding die portion corresponding to the recessed portion at the tip portion of the reference mold. And a step of forming a molding space corresponding to the extrusion cross-sectional shape of the molding by installing the molding die portion and the molding die in a required relationship, and the reference die and the molding die are relatively And a step of supplying a resin material to the molding space to form the molding, a step of separating the mold main body and the mold sub body, and a step of separating the molding and the mold sub body. When,
A method for producing a molded article by extrusion molding, comprising: 4. A method for manufacturing a molded article by extrusion molding according to claim 1, wherein the cross-sectional shape of the molding die is
A method for producing a molded article by extrusion molding, which is characterized in that it is formed by the outer surface of the cross-sectional shape of a mold by-product. 5. A method of manufacturing a molded article by extrusion molding according to claim 1, wherein the cross-sectional shape of the molding die is
A method for producing a molded article by extrusion molding, which is formed by an outer surface of a cross-sectional shape of a mold sub-body and a part of an outer surface of a cross-sectional shape of a mold body. 6. A method of manufacturing a molded article by extrusion molding according to claim 1, wherein the mold by-product is arranged over the entire length of the mold part of the reference mold. Method for manufacturing molded articles by. 7. A method of manufacturing a molded article by extrusion molding according to claim 1 or 3, wherein the mold by-product is arranged in a part of the reference mold in the longitudinal direction. A method for manufacturing a molded article by extrusion molding. 8. A method of manufacturing a molded article by extrusion molding according to claim 1 or 3, wherein the mold sub-member is formed such that its cross-sectional shape is substantially uniform in the longitudinal direction. A method of manufacturing a molded article by extrusion molding. 9. A method of manufacturing a molded article by extrusion molding according to claim 1 , wherein the mold sub-member is formed such that its cross-sectional shape changes in the longitudinal direction. A method for manufacturing a molded article by extrusion molding. 10. The method for producing a molded article by extrusion molding according to claim 9, wherein the undercut molding portion or the convex portion and / or the concave portion of the concave line portion is formed in a part of the mold sub-body in the longitudinal direction. The method for producing a molded article by extrusion molding, wherein a concave portion and / or a convex portion corresponding to the above is formed. 11. A method of manufacturing a molded product by extrusion molding according to claim 1 , wherein the molded product is an elongated molding body having a substantially U-shaped cross section, and both side walls of the molding body. A method for manufacturing a molded article by extrusion molding, which is a belt molding including an elastic seal portion protruding from at least one of the side wall portions. 12. A molding die having an opening at an extrusion opening, a reference die having a molding die portion which is arranged with respect to the opening and constitutes a molding space corresponding to a molded product together with the molding die, and the molding die. A driving device that moves the reference mold relative to each other, wherein the reference mold is configured to be separable by a mold body and a mold sub body that constitutes at least a part of the molding die part; The part is provided with an undercut molding part at a predetermined position, and the undercut molding part is configured to be displaceable to a retracted position in a state where the mold body and the mold sub-member are separated from each other. Equipment for manufacturing molded products by extrusion molding. 13. A convex section and / or a concave section extending from one inner side wall portion of the concave streak portion toward the other inner side wall portion are formed in the concave streak portion of the elongated molding body having a substantially U-shaped cross section. A molding die, a reference die having a molding die that forms a molding space corresponding to the molding together with the molding die, and the molding die and the reference mold are relative to each other. And a drive device that moves to the base mold, the reference mold is configured to be separable by a mold body and a mold sub body that forms at least a part of the molding mold part, and the molding mold part is a recess of the molding body. Convex part of line and /
Alternatively, a concave portion and / or a convex portion for forming a concave portion is provided, and the concave portion and / or the convex portion of the molding die portion is a groove portion of the molding body in a state where the mold body and the mold sub body are separated from each other. An apparatus for manufacturing a molded product by extrusion molding, characterized in that it is separated from the convex portion and / or the concave portion.