JP3479028B2 - Mall 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 a molding method for manufacturing a molding (belt molding, weather strip, gasket, etc.) 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 known that a molding die is extrusion-molded so as to cover the molding die portion of the reference mold by moving the molding die and the reference mold relatively. As a method of manufacturing such a molding, for example, Japanese Patent Laid-Open No. 4-239621
Japanese Patent Laid-Open No. 4-241925. In the method for manufacturing a molding by the extrusion molding,
After supplying the material to the molding space, the molding die and the reference mold are moved relative to each other to extrude the molding so as to cover the molding die of the reference mold, and then the molding is released from the molding die of the reference mold. By doing so, a molding having a concave portion corresponding to the molding die portion is manufactured.

[0003]

By the way, when the molding configured as described above is mounted / mounted on the vehicle body side, for example, a locking clip is held at a desired position of the concave portion of the molding. It is necessary to assemble such a locking member. Further, in order to give the molding itself a function as a locking member, it is conceivable to form a convex portion and / or a concave portion from one inner wall surface of the concave portion of the molding toward the other inner wall surface. However, the convex portion from one inner wall surface of the concave portion of the molding to the other inner wall surface and /
Alternatively, the recess becomes an undercut portion, and it becomes difficult to remove the molding from the molding die portion of the reference die. In particular, when the molding has a non-linear portion in at least a part of the longitudinal direction, or the molding whose cross-sectional shape changes in the longitudinal direction, or when the molding is made of a hard synthetic resin material, etc. In some cases, demolding became even more difficult, and the manufacturing method could not be adopted.

In view of the above-mentioned conventional problems, an object of the present invention is that the locking member can be integrally fixed to the mounting recess of the molding simultaneously with the molding of the molding. An object of the present invention is to provide a method for manufacturing a molding that can reduce the labor for assembling the locking member.

[0005]

In order to achieve the above object, the method for manufacturing a molding according to the invention of claim 1 is a first method for mounting a molding on at least a part of a longitudinal direction.
A method for manufacturing a molding having a concave portion, wherein a molding mounting locking member is detached from at least a part in a longitudinal direction of a molding die portion provided in a reference mold corresponding to the first concave portion. Possibly setting step, arranging the molding die part of the reference mold in the opening part of the molding die, and forming a molding space corresponding to the molding between the molding die and the reference mold, While the material is supplied to the space, the molding die and the reference mold are relatively moved in the longitudinal direction of the molding die section, whereby the molding is extruded along the molding die section and at the same time, the molding die is molded. The locking member is integrated with at least a part of the longitudinal direction of the
And a step of forming a concave portion. Therefore,
Simultaneously with the extrusion molding of the molding, the locking member for mounting the molding can be integrally fixed to the first concave portion. Therefore, unlike the prior art, after the extrusion molding of the molding, it is possible to reduce the time and effort for mounting a separate locking member to the main body of the molding.

A method for manufacturing a molding according to a second aspect of the present invention is the method for manufacturing a molding according to the first aspect,
The locking member is formed with a convex portion and / or a concave portion extending from one inner wall side of the first concave portion toward the other inner wall side.

Further, a molding method according to a third aspect of the present invention is the molding method according to the first aspect,
The locking member is formed in a substantially U-shape that constitutes one inner wall surface and the other inner wall surface of the first concave portion.

A molding method according to a fourth aspect of the present invention is the molding method according to the second aspect,
The locking member has, in a part of its longitudinal direction, a convex portion extending from one inner wall side of the first concave portion toward the other inner wall side and / or
Alternatively, a concave portion is formed.

A method for manufacturing a molding according to a fifth aspect of the present invention is the method for manufacturing a molding according to the first aspect,
The locking member is intermittently arranged in the longitudinal direction of the molding.

A molding method according to a sixth aspect of the present invention is the molding method according to the first aspect,
A non-linear portion is formed on at least a part of the molding in the longitudinal direction.

A molding method according to a seventh aspect of the present invention is the molding method according to the first aspect,
1st which has the locking member integrally in the longitudinal direction of the molding
Forming a recessed portion and a second recessed portion continuous to the first recessed portion, wherein the side wall portions of the portion where the first recessed portion is present and the portion where the second recessed portion is present are The main body made of the molding material is formed to have substantially the same thickness.

The method for manufacturing a molding according to the invention of claim 8 is the method for manufacturing a molding according to claim 1,
1st which has the locking member integrally in the longitudinal direction of the molding
Forming a recessed portion and a second recessed portion continuous to the first recessed portion, wherein the side wall portions of the portion where the first recessed portion is present and the portion where the second recessed portion is present are The thickness of the main body made of the molding material is smaller than that of the second concave portion so that the first concave portion is thinner.

A molding method according to a ninth aspect of the present invention is the molding method according to the first aspect,
In the longitudinal direction of the molding die portion of the reference mold, for temporarily fixing the first convex portion that forms the second concave portion continuously to the first concave portion and the locking member that is integrated with the first concave portion. And a second convex portion of.

A method for manufacturing a molding according to a tenth aspect of the present invention is the method for manufacturing a molding according to claim 9, wherein the first convex portions are present at both longitudinal ends of the second convex portion. The end walls seal the both ends of the recess of the locking member in the longitudinal direction. Therefore, at the time of extrusion molding, it is possible to prevent the problem that the material enters the concave portion of the locking member.

A method for manufacturing a molding according to an eleventh aspect of the present invention is the method for manufacturing a molding according to the first aspect, wherein the main body portion has a first concave portion and the main body portion extends from the main body portion. The molding is integrally and simultaneously extruded with the seal portion to form a molding.

Further, a molding method according to the invention of claim 12 is the molding method according to claim 11, which is a molding used as a belt molding for a vehicle,
The seal portion is elastically deformable.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the first embodiment exemplifies a case where the molding is a belt molding 11 which is mounted along the flange portion of the upper edge of the door panel. The long belt molding 11 has a body portion 12 extending in the longitudinal direction.
And a seal portion 20, and are integrally formed at the same time by extrusion molding. As the synthetic resin material as the first material forming the body portion 12, soft, semi-hard, hard PVC or the like can be used. In addition, since halogen compounds containing chlorine and the like such as PVC generate toxic gases such as chlorine gas when burned, in consideration of dehalogenation, the main body 12 is formed of a synthetic resin material such as PP, AES, ABS or the like. It is desirable to do. In the first embodiment, the main body 12 is formed of a first material made of PP, and the seal portion 20 is a second material made of an elastomer material such as an olefin (or styrene) soft synthetic resin or synthetic rubber. Is formed by.

As shown in FIG. 3, the main body portion 12 of the belt molding 11 integrally includes left and right side wall portions 13 and 14, and a top portion 15 extending over the both side wall portions 13 and 14, and in the mounted state, It is formed in a substantially U-shaped cross section with an open side. Then, in the longitudinal direction of the main body portion 12, as shown in FIG. 2, a first concave portion 16 and a second concave portion 17 having an opening on the lower side are continuously formed in the longitudinal direction. In the first embodiment, a plurality of first concave portions 16 each having a substantially U-shaped cross section are intermittently provided in the longitudinal direction of the main body portion 12 at required intervals. Figure 4
As shown in FIG. 3, the plurality of first concave portions 16 are portions 16 a formed of the synthetic resin material forming the main body portion 12.
And a main body portion 12 are separately formed and integrated with a molding attachment locking member 30.

The locking member 30 is for elastically engaging the flange portion of the upper edge portion of the door panel to mount the belt molding 11, and at the same time as the extrusion molding of the belt molding 11, the locking member 30 of the main body portion 12 is attached. It is integrally fixed to the first concave portion 16. As shown in FIGS. 5 to 7, the locking member 30
Is formed by injection molding or the like of a hard synthetic resin material having elasticity, for example, a synthetic resin material such as PP, nylon, POM, etc., and straddles the left and right side wall portions 31, 32 and both side wall portions 31, 32. The top portion 33 is integrally provided, and in a mounted state, the top portion 33 is formed into a substantially U-shaped cross section with an opening on the lower side. Then, as shown in FIG. 4, the locking member 3
The inner peripheral wall surface of 0 constitutes the inner peripheral wall surface of the first concave portion 16.

The engaging member 30 has projections 34, 35, 37 and recesses 3 for forming projections and / or recesses extending from one inner wall side of the first concave portion 16 to the other inner wall side.
6 and 38 are formed respectively. That is, in the first embodiment, as shown in FIGS. 5 to 7, the lower end portion of the inner wall surface of one side wall portion 31 of the locking member 30 has a substantially longitudinal direction corresponding to the longitudinal direction of the belt molding 11. Over the entire length, a convex portion 35 extending from one inner wall side of the first concave portion 16 toward the other inner wall side is formed, and a concave portion 36 is formed above the convex portion 35. Further, on the inner wall surface upper portion of one side wall portion 31 of the locking member 30, convex portions 34 are formed at both end portions in the longitudinal direction. On the other hand, at a substantially central height position of the inner wall surface of the other side wall portion 32 of the locking member 30, it is located at an intermediate portion of both convex portions 34 on the upper inner wall surface of the one side wall portion 31 and has the first concave shape. Part 1
A convex portion 37 having a substantially triangular cross section is formed from the other inner wall side of 6 toward the one inner wall side, and a concave portion 38 is formed around the convex portion 37.

Further, as shown in FIGS. 3 and 4, in the body portion 12 of the belt molding 11, the thickness of the main body portion 16a of the first concave portion 16 is the same as the side wall portions 13 and 14 of the second concave portion 17.
Also, it is formed thinner than the wall thickness of the top portion 15. In the first embodiment, the main body portion 16 of the first concave portion 16
The thickness of a is equal to the thickness of the locking member 30
It is formed thinner than the concave portion 17. The inner peripheral wall surface of the locking member 30 that forms the inner peripheral wall surface of the first concave portion 16 is substantially continuous with the inner peripheral wall surface of the second concave portion 17 without forming a step surface. (See FIG. 2).

The main body 12 of the belt molding 11 is
A non-linear portion 11a having an inclined shape, a curved shape, a step shape, or the like is formed on at least a part of the longitudinal direction. In the first embodiment, the body portion 12 of the belt molding 11
Is an inclined non-linear portion 1 approximately at the center in the longitudinal direction.
1a is formed. Further, when the belt molding 11 is attached to the flange portion of the upper edge portion of the door panel, one end side in the longitudinal direction is low and the other end side is high, forming a step shape. Also, as shown in FIGS. 1 and 3,
On the outer surface of the side wall portion 14 on one side of the main body portion 12, at a substantially central height position thereof, an elastically deformable seal portion 20 having a hollow cylindrical cross section is continuously extended in the longitudinal direction. . Further, a lip portion 22 is integrally formed at the upper end portion of the seal portion 20 and extends in the longitudinal direction thereof and projects outward by a predetermined length. Further, in the seal portion 20 including the lip portion 22, the outer surface of the seal portion 20, which is in contact with the wind glass or the like, is coated with fibers such as nylon, if necessary. Further, as shown in FIG. 2, end wall portions 12a are integrally formed at both end portions in the longitudinal direction of the main body portion 12, and both end opening portions of the second concave portion 17 are closed by these end wall portions 12a. There is.

Next, as shown in FIGS. 8 to 12, the manufacturing apparatus for manufacturing the belt molding 11 includes an extrusion molding device 40, a reference mold 60, and a driving device (not shown). As shown in FIG. 9, a first material supply pipe 42 for supplying the first material for forming the main body 12 of the belt molding 11 to the molding die 50 of the extrusion molding device 40.
And a second material supply pipe 44 for supplying a second material for forming the seal portion 20 and the lip portion 22 are connected to each other. The first material supply pipe 42 and the second material supply pipe 44 are connected to different material extruders.

As shown in FIG. 9, 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
No. 0 is provided with a side opening 55 that opens the extrusion port 54 to one side surface (lower side surface in the drawing) of the molding die 50.

As shown in FIG. 8, a molding die portion 62 extending in one direction (longitudinal direction) is formed on one side surface (upper side surface in FIG. 8) of the reference mold 60. Then, as shown in FIG. 9, the molding die 50 is attached to one side of the reference mold 60.
One side surface of the molding die 5 is abutted and the molding die portion 62 is
A molding space 53 corresponding to the belt molding 11 is formed between the molding die 50 and the reference mold 60 by being inserted into the zero side opening 55 and arranged. The mold part 62 of the reference mold 60 is the belt molding 1
1 has a dimension slightly longer than the belt molding 11 in the extending direction. The molding die portion 62 has second convex portions 64 intermittently at predetermined longitudinal positions corresponding to the first concave portions 16 of the main body portion 12 of the belt molding 11, and also has the second concave portion 17 of the main body portion 12. The first convex portion 63 is provided at a position corresponding to. Further, the molding die 62
The end wall portion 12 of the belt molding 11 is provided at both ends in the longitudinal direction of the
A third convex portion 65 that forms an end wall forming space 66 for forming a between the first convex portion 63 is provided.

As shown in FIG. 9, of the molding die 62,
The first convex portion 63 has the second concave portion 17 in its cross section.
While being formed in an outer shape corresponding to the shape of the inner peripheral surface of the, the second convex portion 64 is formed in a cross-sectional shape that temporarily holds the locking member 30 and holds it in a detachable manner, as shown in FIG. Has been done. Further, the second convex portion 64 of the molding die portion 62 has the locking member 3
0 from one side of the reference mold 60 with a shape to be inserted between the tip of the convex portion 35 provided on the lower end of the one side wall portion 31 and the convex portion 37 provided on the inner surface of the other side wall portion 32. It is projected vertically. Further, the second convex portion 64 has a length that is substantially the same as the dimension of the locking member 30 in the longitudinal direction, and is located between the end wall portions of the first convex portion 63 that are adjacent to both ends of the second convex portion 64. The locking member 30 is adapted to be inserted into.
At this time, the convex portion 35 formed in the longitudinal direction of the side wall portion 31 of the locking member 30 and the convex portion 3 formed at both end portions in the longitudinal direction.
Each end surface of 4 contacts the end wall portion of the first convex portion 63, whereby the locking member 30 is prevented from moving in the longitudinal direction. Further, as shown in FIG. 8, in the state in which the locking member 30 is inserted and held in the second convex portion 64, the concave space of the locking member 30 is defined by the end wall portion 63 a of the first convex portion 63 and the second convex portion 63. Convex part 6
It is closed by the root portion 64a of No. 4 so that the first material does not enter the recessed space. In addition, the third convex portion 65 has a cross-section in which the belt molding 11
Is formed in an outer shape corresponding to the outer shape of the main body 12. The first convex portion 63, the second convex portion 64, and the third convex portion 65 of the reference mold 60 can be easily formed of a synthetic resin material (a synthetic resin having heat resistance and abrasion resistance). Alternatively, the entire reference die 60 including the forming die portion 62 may be formed of a metal material.

The molding die 50 and the reference mold 60 configured as described above are relatively moved in a required locus based on a program set by a driving device (not shown). A robot (for example, a commercially available 6-axis control robot) is used as a driving device, and, for example, the reference mold 60 is controlled to move with respect to a fixed molding die 50.

Next, a method of manufacturing the belt molding 11 as the molding configured as described above will be described in the order of steps. First, in the setting step (first step), which is a pre-step of the die matching step, the locking members 30 are inserted from above the respective second convex portions 64 provided on the forming die portion 62 of the reference die 60. Set. In addition, the locking member 30
Is formed of a synthetic resin that is incompatible with the first material corresponding to the main body portion 12 of the belt molding 11, the surface of the locking member 30 (the surface that comes into contact with the first material during extrusion molding) is Is coated with an adhesive as needed. Next, in the die matching step (second step), the third convex portion 65 on one end side in the longitudinal direction of the forming die portion 62 of the reference die 60 is inserted from the side opening 55 of the forming die 50 into the extrusion port 54 thereof. Is placed.

An extrusion molding process is performed subsequent to the mold matching process. In this extrusion molding step (third step), first, the first material is supplied to the first material supply path 51 of the molding die 50 from the material extruder through the first material supply pipe 42 in a molten state. Further, the second material is supplied in a molten state to the second material supply path 52 from another material extruder through the second material supply pipe 44. 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 53 and are extruded from the front opening of the extrusion port 54, respectively.

Then, at a speed substantially the same as the extrusion speed of the first and second materials extruded from the front opening of the extrusion port 54, the movement of the reference mold 60 is controlled in the extrusion direction based on a program set. . by this,
In the molding die portion 62 of the reference die 60, the belt molding 11 integrally including the main body portion 12 made of the first material and the seal portion 20 made of the second material in the longitudinal direction is extruded in an integrally continuous manner. . It should be noted that in order to form the end wall portion 12a of the belt molding 11 without defective molding, the first material is filled in the end wall forming spaces 66 provided at both ends in the longitudinal direction of the forming die portion 62 without fail. The movement of the reference mold 60 is controlled by the drive device so that the movement speed of the reference mold 60 is low at both ends of the portion 62 in the longitudinal direction, or is temporarily stopped. It is also possible to control the number of revolutions of the extrusion screw of each material extruder by a control device and adjust the supply amount of the first and second materials per unit time. Therefore, by controlling the rotation speed of the extrusion screw of each material extruder by the control device, the first material can be supplied to the end wall molding spaces 66 provided at both ends of the molding die 62 in the longitudinal direction without shortage. It can be filled and the end wall portion 12a of the belt molding 11 can be formed without defective molding.

When the extrusion molding process is performed as described above and the belt molding 11 is formed on the molding die portion 62, the supply of both the first and second materials to the molding die 50 is cut off, and the reference die 60 and The molding die 50 is separated. Then, after the belt molding 11 is cooled and solidified in the molding die portion 62 of the reference mold 60, a demolding step is performed. This demolding process (4th
In the process (1), the belt molding 11 is removed from the molding die portion 62 by pulling up the belt molding 11 with respect to the molding die portion 62 of the reference mold 60. In the belt molding 11, the first concave portion 1 that opens downward in the longitudinal direction of the main body portion 12 as viewed in FIGS. 3 and 4.
6 and the second concave portion 17 corresponding to the first convex portion 63 are continuously formed in the longitudinal direction. Further, the first concave portion 16 is composed of a main body portion 16a made of the first material forming the main body portion 12 and a locking member 30 for mounting the molding.

As described above, at the same time as the extrusion molding of the belt molding 11, at the first concave portion 16 of the main body 12 thereof, the molding is formed integrally with the main body portion 16a of the first material forming the main body portion 12. The mounting locking member 30 can be fixed. Therefore, unlike the prior art, after the extrusion molding of the belt molding, it is possible to reduce the time and effort to attach the separate locking member to the main body portion. Further, when the belt molding 11 is released from the mold, both side wall portions 3 of the locking member 30 are removed.
The convex portions 34, 35, 37 and the concave portion 3 formed on the inner surface of 1.
6 and 38 do not become an undercut portion with respect to the forming die portion 62 of the reference die 60. Therefore, in the demolding step, the belt molding 11 can be easily demolded from the molding die portion 62 by pulling the belt molding 11 upward with respect to the molding die portion 62 of the reference mold 60.

After the demolding step, a post-treatment step is performed. In this post-treatment step (fifth step), since both end portions in the longitudinal direction of the seal portion 20 including the lip portion 22 of the belt molding 11 have unstable cross-sectional shapes due to extrusion molding, the longitudinal direction of the seal portion 20. Both ends of each are cut by a predetermined length by a cutter or the like. As a result, the unstable shape portions at both ends of the seal portion 20 are removed (see FIG. 1). If necessary, the outer surface of the seal portion 20 including the lip portion 22 that is in contact with the windshield glass is sequentially subjected to corona discharge treatment and primer treatment, and then coated with an adhesive to form a fiber such as nylon. Flock 23 is applied (see FIGS. 3 and 4). The belt molding 11 as a product is manufactured through the above-described steps in order.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. FIG.
As shown in FIG. 14 also in the second embodiment,
The case where the molding is the belt molding 111 mounted along the flange portion of the upper edge portion of the door panel will be exemplified. The long belt molding 111 has a main body 112 extending in the longitudinal direction thereof, and lip-shaped seals 125 and 126 extending from upper and lower portions of one outer surface of the main body 112.
And is integrally formed by extrusion molding. In addition, a sliding layer 127 made of a synthetic resin having excellent slidability is provided on the outer surface (the side facing the windshield) of the seal portion 126 on the lower side in FIG.
It is integrally provided at the same time as the extrusion molding of 11. In the first embodiment, the main body 112 is formed of a first material such as PP, the seal portion 20 is formed of a second material such as an elastomer material, and the sliding layer 127 is formed of a synthetic resin having excellent slipperiness. It is made of a third material.

As shown in FIG. 13, the belt molding 111
The main body portion 112 includes left and right side wall portions 113 and 114,
An apex 115 that straddles these both side wall portions 113 and 114 is integrally provided, and is formed in a substantially U-shaped cross section with an opening on the lower side. Then, in the longitudinal direction of the main body 112, as shown in FIGS. 13 and 14, the first concave portion 1 having an opening on the lower side is formed.
16 and the second concave portion 117 are continuously formed in the longitudinal direction. Further, also in the second embodiment,
In the longitudinal direction of the main body 112, a plurality of first concave portions 116 each having a substantially U-shaped cross section are provided intermittently at required intervals. The plurality of first concave portions 116
Is a main body portion 116a formed of the first material forming the main body portion 112, and the main body portion 112 (main body portion 116a).
And a molding member locking member 130 that is separately formed and fixed integrally with the main body portion 116a.

The locking member 130 is formed by injection molding or the like of an elastic hard synthetic resin material, and has a top portion 133 and a side wall portion 132 which respectively form the top inner surface and the one side inner wall surface of the first concave portion 116. Be prepared for one.
The locking member 130 is provided with a convex portion 135 and a concave portion 136 for forming a convex portion and / or a concave portion extending from one inner wall side of the first concave portion 116 toward the other inner wall side.

That is, in the second embodiment, as shown in FIGS. 15 and 17, the side wall portion 1 of the locking member 130 is formed.
At the lower end of the inner wall surface of 32, a convex portion 135 extending from one inner wall side of the first concave portion 116 to the other inner wall side is formed over substantially the entire length in the longitudinal direction, and above the convex portion 135. A recess 136 is formed. Also,
As shown in FIGS. 13 and 14, in the main body portion 112 of the belt molding 111, the main body portion 116 of the first concave portion 116.
The thickness of a is equal to the side wall portions 113 and 114 of the second concave portion 117.
And the top portion 115 is formed to have almost the same thickness. The locking member 30 integrated with the main body portion 116a of the first concave portion 116 projects inward by an amount corresponding to the thickness thereof.

The manufacturing device for manufacturing the belt molding 111 includes an extrusion molding device 140, a reference mold 160, and a driving device (not shown). As shown in FIGS. 19 and 20, the molding die 150 of the extrusion molding device 140 is provided with a first material supply pipe 142 for supplying a first material for forming the main body 112 of the belt molding 111.
A second material supply pipe 144 for supplying a second material for forming the seal portions 125 and 126, and the seal portion 126.
And a third material supply pipe 146 for supplying a third material for forming the sliding layer 127 of FIG. The first material supply pipe 142 and the second material supply pipe 14
The fourth and third material supply pipes 146 are connected to different material extruders.

As shown in FIG. 19, inside the molding die 150, a first material supply passage 151 communicating with the first material supply pipe 142 and a second material supply passage 152 communicating with the second material supply pipe 144, A third material supply passage 156 that communicates with the third material supply pipe 146 is provided. Further, the molding die 150 has a molding portion that communicates with the downstream sides of the first material supply path 151, the second material supply path 152, and the third material supply path 156 and that has a molding portion corresponding to the outer shape of the belt molding 111. An outlet 154 is provided, and the extrusion port 154 is open to the front surface of the molding die 150. In addition, the molding die 150 has a side opening 15 for opening the extrusion port 154 to one side surface of the molding die 150 (lower side surface as viewed in FIG. 19).
5 are provided. On one side (upper side in FIG. 19) of the reference mold 160, the mold part 16 extending in the longitudinal direction thereof is provided.
2 is formed. Then, the molding die portion 162 of the reference mold 160 is inserted and arranged in the side opening 155 of the molding die 150, so that a molding space corresponding to the belt molding 111 is formed between the molding die 150 and the reference mold 160. 153 is configured.

As shown in FIGS. 15 and 16, the reference mold 16
The molding die 162 of 0 is the main body 1 of the belt molding 111.
The second convex portions 164 are intermittently provided at predetermined longitudinal positions corresponding to the twelve first concave portions 116, respectively,
The main body 112 has a first convex portion 163 at a position corresponding to the second concave portion 117. In the second embodiment, the molding die portion 162 of the reference die 160 has a convex portion over the entire length in the longitudinal direction, and a part of the convex portion forms the first convex portion 163, and the other portion. Part of the second protrusion 164
Is doing. The crossing of the second convex portion 164 is the first
Compared to the cross section of the convex portion 163, the convex portion 163 has a missing shape in which the thickness is reduced from the upper end surface to one side surface.

The second convex portion 164 of the molding die 162 has substantially the same length as the lengthwise dimension of the locking member 130, and the locking member 130 is inserted from above to be held detachably. It is like this. Then, in the state where the locking member 130 is inserted and held in the second convex portion 164, the locking member 130 is prevented from moving in the longitudinal direction, and the concave space inside the locking member 130 is the second convex. Part 16
End walls 16 of the first convex portion 163 located at both ends in the longitudinal direction of No. 4
It is sealed by 3a so that the first material does not enter. Further, the molding die 150 and the reference mold 160 are relatively moved in a required locus based on a program set by a driving device (not shown) in substantially the same manner as in the first embodiment. For example, the reference mold 60 is controlled to move with respect to the fixed molding die 50.

Next, the belt molding 111, which is a molding configured as described above, undergoes a setting step, a mold matching step, an extrusion molding step, and a demolding step in the same manner as in the first embodiment. 111 is manufactured. That is, in the setting step, which is a step prior to the die matching step, each second convex portion 1 provided in the forming die portion 162 of the reference die 160.
The locking members 130 are inserted and set from above 64 (see FIG. 18). In the mold matching process, FIG.
And as shown in FIG. 20, the molding die portion 162 of the reference die 160.
One end in the longitudinal direction of the side opening 155 of the molding die 150.
Is inserted into the extrusion port 154 and is arranged. Thereby, the molding die portion 162 of the reference mold 160 and the molding die 15
A molding space 153 corresponding to the belt molding 111 is formed between the zero extrusion port 154. In the extrusion process,
The first to third materials supplied to the molding die 150 are the molding space 1
They are respectively sent toward 53 and pushed out from the front opening of the extrusion port 154. Then, the extrusion port 15
At the same speed as the extrusion speed of the first to third materials extruded from the front opening of No. 4, the reference mold 160 is controlled to move in the extrusion direction based on a program. As a result, in the molding die portion 161 of the reference die 160, the main body portion 112 made of the first material, the seal portions 125 and 126 made of the second material, and the sliding layer 127 made of the third material are arranged in the longitudinal direction. Belt molding 111 provided integrally
Are extruded in one continuous form.

After the belt molding 111 is cooled and solidified in the molding die portion 162 of the reference mold 160, a demolding step is performed. In this demolding step, the belt molding 111 is removed from the molding die 162 by pulling up the belt molding 111 above the molding die 162 of the reference mold 160. In the belt molding 111, in the longitudinal direction of the main body portion 112, a first concave portion 116 and a second concave portion 117, which open downward in FIGS. 13 and 14, are continuously formed in the longitudinal direction. It is formed. Further, as shown in FIG. 14, the first concave portion 116 is composed of a main body portion 116a made of the first material forming the main body portion 112, and a locking member 130 for mounting the molding.

As described above, also in the second embodiment, in the same manner as in the first embodiment, at the same time as the extrusion molding of the belt molding 111, at the same time as the first concave portion 116 of the main body 112, the main body 112 is formed. Forming the first
The locking member 130 for mounting the molding can be fixed integrally with the main body portion 116a made of a material. For this reason,
Unlike the conventional method, after the extrusion molding of the belt molding, it is possible to reduce the time and effort for mounting a separate locking member to the main body of the belt molding. When the belt molding 111 is released from the mold,
The convex portion 135 and the concave portion 136 formed on the inner surface of the side wall portion 132 on one side of the locking member 130 include the molding die portion 1 of the reference die 160.
62 does not become an undercut portion. For this reason,
In the demolding step, the belt molding 111 can be easily demolded from the molding die 162 by pulling the belt molding 111 upward with respect to the molding die 162 of the reference mold 160. In addition, in the second embodiment, since the sliding layer 127 having good slipperiness can be provided on the seal portion 126 at the same time as the extrusion molding of the belt molding 111, in the post-treatment process, the sliding layer 127 is provided at a predetermined position of the seal portion. It is possible to reduce the time and effort required for flocking.

In the second embodiment, the locking member 13
The first number 0 corresponds to the main body 112 of the belt molding 111.
When it is formed of a synthetic resin that is not compatible with the material, an adhesive is applied to the surface of the locking member 130 (the surface that comes into contact with the first material during extrusion molding) as needed. Further, by forming the surface of the locking member 130 to have an irregularly-shaped uneven surface, it is possible to eliminate the need to apply an adhesive. For example, as shown in FIGS. 21 and 22, a groove-shaped recess 130a having a cross section is formed on the surface of the top 133 and the side wall 132 of the locking member 130,
Alternatively, the main body 116a made of the first material and forming the main body 112 and the locking member 130 may be firmly integrated and fixed by forming the protrusion 130b having a wide tip and a narrow base. You can

The method of manufacturing the molding according to the present invention is not limited to the first and second embodiments.
For example, as the mall, the belt mall 11 (111)
Other weather strips may be used, or a molding without the hollow seal portion 20 or the lip seal portions 125 and 126 may be used.

[0047]

As described above, according to the present invention,
Simultaneously with extrusion molding of the molding, the locking member can be integrally fixed to the mounting recess of the molding, and the work of assembling the locking member after extrusion molding the molding can be reduced. Manufacturing costs can be reduced.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view showing a belt molding of the same.

3 is a cross-sectional view of the belt molding corresponding to line III-III in FIG.

FIG. 4 is a transverse sectional view of the belt molding corresponding to line IV-IV in FIG.

FIG. 5 is a side view showing a locking member of the same.

FIG. 6 is a transverse cross-sectional view of the locking member according to the VI-VI line of FIG.

FIG. 7 is a transverse cross-sectional view of the locking member, similarly based on the line VII-VII of FIG.

FIG. 8 is an explanatory view showing a relationship between a forming die portion of a reference die, a locking member and a forming die.

9 is a transverse cross-sectional view of the forming die section of the reference die based on the line IX-IX of FIG. 8.

FIG. 10 is a transverse sectional view of the forming die part of the reference die based on the line XX of FIG.

FIG. 11 is a transverse cross-sectional view of the forming die section of the reference die, which is also based on the line XI-XI of FIG. 8.

FIG. 12 is a vertical cross-sectional view showing the vicinity of the end of the molding die of the reference die.

FIG. 13 is a transverse cross-sectional view showing a second recessed portion of a belt molding as a molding according to Embodiment 2 of the present invention.

FIG. 14 is a transverse sectional view showing a first concave portion of the belt molding.

FIG. 15 is a perspective view showing the forming die portion of the reference die and the locking member in a separated manner.

FIG. 16 is a side view showing the forming die portion of the reference die and the locking member in a separated manner.

FIG. 17 is a cross-sectional view showing a locking member of the same.

FIG. 18 is a transverse cross-sectional view showing a state in which the locking member is assembled to the second convex portion of the molding die portion of the reference die.

FIG. 19 is a transverse cross-sectional view showing the relationship between the reference mold and the molding die when the second concave portion of the belt molding is formed.

FIG. 20 is a transverse cross-sectional view showing the relationship between the reference mold and the molding die when the first concave portion of the belt molding is formed.

FIG. 21 is a transverse sectional view showing a modification of the locking member.

FIG. 22 is a transverse sectional view showing a state in which the locking member is also integrated with the first concave portion of the belt molding.

[Explanation of symbols]

11,111 Belt Mall (Mall) 12, 112 Main body 16, 116 1st concave part 17, 117 second concave portion 20, 125, 126 Seal part 30, 130 Locking member 35, 37, 135 Convex part 36, 38, 136 recesses 50,150 Molding die 53,153 Molding space 54,154 Extrusion port 55,155 side opening 60, 160 Standard type 62, 162 Mold part 63, 163 1st convex part 64,164 Second convex portion

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

Claims (12)

(57) [Claims] 1. A method of manufacturing a molding having a first concave portion for mounting a molding on at least a part in a longitudinal direction, the molding die being provided on a reference mold corresponding to the first concave portion. At least a part in the longitudinal direction of the part, a step of releasably setting the locking member for mounting the molding, and arranging the mold part of the reference mold in the opening part of the molding die,
A step of forming a molding space corresponding to the molding between the molding die and the reference mold, the molding die and the reference mold while supplying a material to the molding space, in the longitudinal direction of the molding die portion. By moving the molding relatively, the molding is extruded along the molding die portion, and at the same time, the first concave portion in which the locking member is integrated is formed on at least a part of the molding in the longitudinal direction. A method of manufacturing a molding, comprising: 2. The method for manufacturing a molding according to claim 1, wherein the locking member is provided with a convex portion and / or a concave portion extending from one inner wall side of the first concave portion toward the other inner wall side. Method for manufacturing malls. 3. The method for manufacturing a molding according to claim 1, wherein the locking member is formed in a substantially U-shape that constitutes one inner wall surface and the other inner wall surface of the first concave portion. Mall manufacturing method. 4. The method for manufacturing a molding according to claim 2, wherein the locking member has, in a part in a longitudinal direction thereof, a protrusion extending from one inner wall side of the first recessed portion toward the other inner wall side thereof. Department and /
Alternatively, a method of manufacturing a molding for forming a recess. 5. The method for manufacturing a molding according to claim 1, wherein the locking member is intermittently arranged in a longitudinal direction of the molding. 6. The method for manufacturing a molding according to claim 1, wherein a non-linear portion is formed on at least a part of the molding in a longitudinal direction of the molding. 7. The method for manufacturing a molding according to claim 1, wherein a first locking member is integrally formed in a longitudinal direction of the molding.
Forming a recessed portion and a second recessed portion that is continuous with the first recessed portion, and in the side wall portions of the portion where the first recessed portion is present and the portion where the second recessed portion is present, A method for manufacturing a molding, in which a main body made of the molding material has substantially the same thickness. 8. The method for manufacturing a molding according to claim 1, wherein a first locking member is integrally formed in a longitudinal direction of the molding.
Forming a recessed portion and a second recessed portion that is continuous with the first recessed portion, and in the side wall portions of the portion where the first recessed portion is present and the portion where the second recessed portion is present, A method for manufacturing a molding in which the thickness of the main body made of the molding material is smaller than that of the second concave portion in the first concave portion. 9. The method for manufacturing a molding according to claim 1, wherein a first convex portion that forms a second concave portion continuous with the first concave portion in the longitudinal direction of the molding die portion of the reference mold. And a second convex portion for temporarily fixing the locking member integrated with the first concave portion, respectively. 10. The method for manufacturing a molding according to claim 9, wherein the end wall portions of the two first convex portions present at both ends of the second convex portion in the longitudinal direction respectively form the concave portion of the locking member. A method for manufacturing a molding in which both ends in the longitudinal direction are sealed. 11. The method for manufacturing a molding according to claim 1, wherein the main body having the first concave portion and the seal portion extending from the main body are integrally and simultaneously extrusion-molded. Of manufacturing a molding for forming a mold. 12. The method of manufacturing a molding according to claim 11, wherein the molding is a molding used as a belt molding for a vehicle, and a seal portion is elastically deformable.