JP3238632B2 - Manufacturing method of molding for vehicle and extrusion molding apparatus - 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 for manufacturing a molding for a vehicle and an extrusion molding apparatus for the method.

2. Description of the Related Art Conventionally, a method for manufacturing a molding for a vehicle including a molding main body, a projecting lip extending from the molding main body, and a projecting lip whose projection dimension changes in the longitudinal direction of the molding main body. Is disclosed, for example, in JP-A-6-297943. In this case, an extrusion port having an extrusion port shape corresponding to the molding die body, the overhang lip (outer lip) and the protruding lip (groove lip) is formed on the fixed die,
A movable die (shutter) is attached to a protruding lip extruding portion of the extrusion port so as to be able to advance and retreat. Then, when the molding body, the overhang lip and the protruding lip are integrally extruded from the extrusion port of the fixed die, the movable die is advanced and retracted with respect to the projection lip extrusion portion of the extrusion port, so that the molding body is formed. A protrusion lip whose protrusion dimension has changed in the longitudinal direction is extruded.
The design surface of the protruding lip which is extruded as described above has a portion near the front end formed by the front end surface of the movable die, and portions other than the front end portion are formed by the inner surface of the protruding lip extrusion portion of the extrusion port.

[0003]

By the way, in the vehicle molding extruded as described above, the design surface of the protruding lip is formed such that a portion near the front end is formed by the front end surface of the movable die, and the other portions are pressed. Since it is formed by the inner surface of the protruding lip extruded portion of the outlet, unevenness in color and gloss occurs on the design surface of the protruding lip, or a streak-like projection at the intersection between the tip surface of the movable die and the protruding lip extruded portion. May occur, and there is a problem that appearance design is deteriorated. Also, if an extension is formed at the tip of the movable die and a molding surface is formed on the extension from the front end to the base end of the design surface of the protruding lip, a protruding lip having a beautiful design surface can be formed. Although it becomes possible, when the movable die moves forward, there occurs a problem that the extended portion interferes with the overhang lip and causes molding failure.

An object of the present invention is to provide a method of manufacturing a molding for a vehicle capable of forming a protruding lip having a beautifully designed surface without causing molding defects in the overhanging lip, in view of the conventional problems described above. An object of the present invention is to provide an extruder.

[0005]

According to a first aspect of the present invention, there is provided a method of manufacturing a molding for a vehicle, comprising the steps of: forming a molding body; a projecting lip extending from the molding body; A protruding lip whose protruding dimension changes in the longitudinal direction of the main body,
A method for manufacturing a molding for a vehicle integrally comprising, when extruding the molding body and the protruding lip from a main extrusion port of a fixed die, corresponds to a design surface extending from a distal end to a base end of the protruding lip. A movable die having a molding surface that forms a streak-like projection with respect to the main extrusion port
By moving the molding die back and forth without extruding, a protruding lip having a protruding amount changed in the longitudinal direction of the molding main body is extruded, and further separated from the moving trajectory of the movable die and
The molding body and the overhanging ripple the overhanging lip from the secondary extrusion opening has kicked set the extrusion direction downstream side of said main extrusion port is extruded in the longitudinal direction of the molding body
And up in the coupling child together, characterized in that to produce the molding.

According to a second aspect of the present invention, there is provided an extrusion molding apparatus for a molding for a vehicle, wherein a projection main body, a protruding lip protruding from the molding main body, and a projecting dimension of the molding main body vary in a longitudinal direction. A molding die for a vehicle integrally provided with a protruding lip, wherein a main extrusion port corresponding to the molding body and the protruding lip is formed in a fixed die, and a base is formed from a tip of the protruding lip. A movable die having a molding surface corresponding to the design surface extending across the edge generates a streak-like projection with respect to the protruding lip extrusion portion of the main extrusion port.
It is assembled so as to be able to advance and retreat without being made, and is integrated with the molding body on the downstream side in the extrusion direction of the main extrusion port.
A sub-extruding port for joining and extruding the overhang lip is provided at a distance from the moving trajectory of the movable die.

[0007] In accordance, the vehicle according to claim 1 and 2
Method of molding for molding and its extrusion molding equipment
When the design surface of the protruding lip by a molding surface of the variable dynamic die,
Generates a stripe-like protrusions over the proximal end of the tip
It can be the appearance beautifully molded without. Further, the projecting rib can be extruded in the longitudinal direction of the molding body without interfering with the movable die.

According to a third aspect of the present invention, there is provided an extrusion molding apparatus for a vehicle molding according to the second aspect, wherein a front surface of the fixed die is provided on a front surface of the fixed die.
A guide groove for guiding the movable die forward and backward is provided. Therefore, the movable die can be guided forward and backward along a predetermined trajectory by the guide groove.
A sub extrusion port can be formed near the front surface of the fixed die.

According to a fourth aspect of the present invention, there is provided an extrusion molding apparatus for a vehicle molding according to the second or third aspect, wherein the auxiliary die has a sub-extrusion port on a front surface of the fixed die. Is assembled. Therefore, the auxiliary extrusion port can be easily formed in the auxiliary die.

[0010]

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. 5 and 6, a molding 11 for a vehicle is shown.
Includes an upper molding portion 11a, a corner molding portion 11b, and both left and right side molding portions 11c, which are mainly attached continuously from the upper edge portion of the windshield 1 to the left and right side portions,
In its cross section, the head 13, the legs 14, and the locking portions 1
5, a protruding lip 16 protruding outward from the head 13 or the leg 14 of the molding body 12, and a longitudinal portion of the molding body 11 protruding from the top surface of the head 13. And a projecting lip 17 whose projecting dimension changes in the direction.

In the first embodiment, as shown in FIGS. 4 and 6A, in the side molding portion 11c, the projecting dimension of the projecting lip 17 is set to a predetermined projecting dimension, so that the rainwater receiving section is formed. Is composed. Also, from the upper part of the side molding part 11c to the corner molding part 11b, the projection dimension of the projection lip 17 is gradually reduced, and as shown in FIGS. The dimension becomes 0 and forms the top surface of the head 13. The molding body 12 and the protruding lip 17 are formed of a semi-rigid elastic material, for example, a thermoplastic synthetic resin material such as semi-rigid PVC, and the overhang lip 16 is formed of a rigid elastic material, for example, a chlorinated polyethylene-based thermoplastic elastomer. Is formed.

FIG. 1 is a perspective view of an apparatus for extruding the molding 11, FIG. 2 is a front view, and FIG. 3 is a cross-sectional view. Are formed, and the first material flow path 22 communicates with the main extrusion port 24. The main extrusion port 24
Is formed in a sectional shape corresponding to the molding body 12 and the protruding lip 17 and is opened at the front surface of the fixed die 21. Further, in the first embodiment, the lower half of the front surface of the fixed die 21 is formed on a step surface projecting forward, and the portion of the step surface is used as the auxiliary die 26. The leg extrusion part 24a and a part of the head extrusion part 24b which constitute a part of the main extrusion port 24 are connected to the auxiliary die 26.
And is open to the front of the auxiliary die 26. The auxiliary die 26 can be formed integrally with the fixed die 21, or can be formed separately from the fixed die 21 and then assembled on the front surface of the fixed die 21. A movable die 31 is attached to the fixed die 21 so as to advance and retreat with respect to the protruding lip extruded portion 24c of the main extrusion port 24.

In the first embodiment, the fixed die 21
An arc-shaped guide groove 27 for guiding the movable die 31 forward and backward is formed in the front surface of the auxiliary die 26, and one end 27 a of the guide groove 27 is formed over the back surface of the auxiliary die 26. Further, the guide groove 27 is formed with a groove depth substantially the same as the thickness of the movable die 31. The movable die 31 is fitted in the guide groove 27 so as to be able to advance and retreat in substantially the same plane as the front surface of the fixed die 21, and is pressed by a pressing plate 28. An extension 32 is formed on the distal end side of the movable die 31, and a molding surface 33 for molding the design surface of the protruding lip 17 from the distal end to the proximal end is formed on one side surface of the extension 32. I have. The movable die 31 is connected to a tip end of a drive lever 34 that reciprocates by using a motor, a cylinder, or the like as a drive source, and is moved forward and backward by a shaft 35.

The auxiliary die 26 provided on the front surface of the fixed die 21 has a sub extrusion port 25 formed at a distance from the path of movement of the movable die 31 (the guide groove 7). This sub extrusion port 2
5 is formed in a sectional shape corresponding to the overhang lip 16,
Opening to the front of the auxiliary die 26,
In the portion of the sub extrusion port 25 corresponding to the base end of No. 6,
It communicates with the main extrusion port 24. Further, the sub extrusion port 25 is communicated with the second material flow path 23 via a bypass 23 a formed around the guide groove 27 of the movable die 31.

Next, a description will be given of a method of manufacturing a molding together with the operation of the extrusion molding apparatus of the first embodiment configured as described above. First, the first material (melt-kneaded thermoplastic resin material) P1 is supplied to the first material flow path 22 of the fixed die 21, and the second material (melt-kneaded) is supplied to the second material flow path 23. A thermoplastic elastomer material) P2 is supplied. As shown in FIG. 1A and FIG. 2A,
In a state where the movable die 31 is arranged at the retracted position, the first material P1 is extruded from the main extrusion port 24,
The molding body 12 and the protruding lip 17 are integrally formed.

Further, the second material P2 is extruded from the sub-extruding port 25 through the detour 23a, so that the overhang lip 16 is integrally welded and formed in the longitudinal direction of the molding body 12. As described above, the movable die 31
Is extruded from the lower end to the vicinity of the upper end of one of the side molding portions 11c of the molding 11 under the state of being disposed at the retracted end position. And movable die 3
The design surface of the protruding lip 17 is formed beautifully from the front end to the base end of the protruding lip 17 without unevenness in color and luster and without generation of streak-like projections by the one forming surface 33.

Thereafter, as the movable die 31 is advanced toward the forward end position, the projection size of the projection lip 17 is gradually reduced. One side molding part 1
1C is extruded and subsequently one corner molding portion 11b is extruded, while FIG.
As shown in FIG. 2 (B), the movable die 31 is advanced to the advanced end position, whereby the projection size of the projection lip 17 becomes zero and forms the top surface of the head. And movable die 3
The upper molding portion 11a is extruded under the condition that the first molding member 1 is disposed at the forward end position, and subsequently, the other corner molding portion 11b is extruded.

While the other corner molding portion 11b is being extruded, the movable die 31 starts to retract. When the upper end portion of the other side molding portion 11c is extruded, the movable die 31 is retracted to the retracted end position. As a result, the protrusion size of the protrusion lip 17 is gradually increased to a predetermined protrusion size. Thereafter, the other side molding portion 11c is extruded to the lower end in a state where the movable die 31 is disposed at the retracted end position, thereby completing one cycle of extrusion molding of the molding 11.

By extruding the molding 11 as described above, the movable die 3 disposed at the retreat end position is formed at the left and right side molding portions 11c.
The protruding lip 17 having a beautifully designed surface can be formed by the one forming surface 33. In the upper molding portion 11a, the extension portion 32 of the movable die 31 disposed at the forward end position is attached to the overhanging lip 16. Since there is no interference, there is no problem that the overhang lip 16 causes molding failure.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, as shown in FIGS. 10A and 10B, the molding
A locking portion 15 is formed in a folded shape at the tip of the second leg portion 14, and a protruding lip 16 is protruded from the outer surface of the leg portion 14. Furthermore, the base of the overhanging lip 16 is formed hollow, and two lip portions 16a, 16
6b are integrally formed. Molding body 12
The head 13 and the protruding lip 17 are formed in substantially the same manner as in the first embodiment. And the molding 11
FIGS. 7 to
As shown in FIG. 9, the fixed die 21, the movable die 31, and the auxiliary die 26 are mainly configured.

The molding die 1 is mounted on the fixed die 21.
A main extrusion port 24 having a cross-sectional shape corresponding to the second die 2 and the protruding lip 17 is formed so as to open to the front surface of the fixed die 21. The auxiliary die 26 is formed separately from the fixed die 21, and one side surface thereof is fixed to the front surface of the fixed die 21 along one side surface of the leg extrusion portion 24 a of the main extrusion port 24 by a bolt 20 or the like. Then, the overhang lip 1 is attached to the auxiliary die 26.
6 has a cross-sectional shape corresponding to that of the movable die 3.
The auxiliary die 21 is formed so as to be spaced apart from the advance / retreat trajectory and is opened at the front surface and one side surface of the auxiliary die 21. The main extrusion port is communicated with the first material flow path 22, and the sub extrusion port 25 is connected to the second material flow path 23 via a bypass 23 a formed around the guide groove 27 of the movable die 31. Is communicated to. Then, the molding body 12 and the protruding lip 17 are extruded from the main extrusion port 24,
The overhang lip 16 is extruded from the auxiliary extrusion port 24 while being integrally welded in the longitudinal direction of the molding body 12. Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

[0022]

As described above, according to the present invention,
The design surface of the protruding lip can be formed to have a beautiful appearance without unevenness in color and luster and without causing streaky projections, without causing molding defects in the overhanging lip and the molding surface of the movable die.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an extrusion molding apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view of the same.

FIG. 4 is a side view showing the same molding.

FIG. 5 is a front view showing a state where a molding is mounted on the windshield.

6 shows VI (A) -VI (A) and VI (B) -VI of FIG.
It is sectional drawing based on (B) line.

FIG. 7 is a perspective view showing an extrusion molding apparatus according to Embodiment 2 of the present invention.

FIG. 8 is a front view of the same.

FIG. 9 is a sectional view of the same.

FIG. 10 is a sectional view showing a side molding part and an upper molding part of the molding, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Molding for vehicles 12 Molding main body 16 Overhang lip 17 Projection lip 21 Fixed die 22 Main extrusion port 25 Secondary extrusion port 26 Auxiliary die 27 Guide groove 31 Movable die 32 Extension part 33 Molding surface

Continuation of the front page (56) References JP-A-8-90638 (JP, A) JP-A-6-297943 (JP, A) JP-A-5-162186 (JP, A) JP-A-7-223251 (JP) JP-A-4-338523 (JP, A) JP-A-4-338524 (JP, A) JP-A-8-150652 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) B29C 47/00-47/96

Claims (4)

(57) [Claims] 1. A method for manufacturing a molding for a vehicle, comprising: a molding body; a protruding lip protruding from the molding body; and a protruding lip whose protruding dimension changes in a longitudinal direction of the molding body. When the molding body and the protruding lip are extruded from a main extrusion port of a fixed die, the movable die having a molding surface corresponding to a design surface extending from a tip end to a base end of the projection lip is moved to the main extrusion port. May cause streak-like projections
By moving the movable die back and forth, the protruding lip having a protruding amount changed in the longitudinal direction of the molding body is extruded.
Extruded from the sub extrusion port which kicked set the extrusion direction downstream side of the extrusion port of the overhanging lip in the longitudinal direction of the molding body
Molding the molding body and the overhang lip
In the coupled child together, the manufacturing method of the vehicle molding, characterized in that to produce the molding. 2. A molding for a vehicle, comprising a molding body, a projecting lip extending from the molding body, and a projecting lip whose projection dimension changes in a longitudinal direction of the molding body, are extruded. An apparatus, wherein a fixed die has a main extrusion port corresponding to the molding body and the protruding lip, and a movable die having a molding surface corresponding to a design surface extending from a distal end to a proximal end of the protruding lip, movably assembled without causing stripe-like protrusion to the protruding lip extrusion of the main extrusion port, the extrusion direction downstream side of said main extrusion port, said Mauldin
Extrusion molding of the overhang lip
Extrusion device for a molding for a vehicle, characterized in that a sub-extruding port is provided at a distance from a moving trajectory of the movable die. 3. The extrusion molding apparatus for a vehicle molding according to claim 2, wherein a guide groove for guiding the movable die forward and backward is formed in the front surface of the fixed die. Extrusion molding equipment. 4. The extrusion molding apparatus for a molding for a vehicle according to claim 2, wherein a front surface of the fixed die includes:
An extrusion molding apparatus for a molding for a vehicle, wherein an auxiliary die having a sub extrusion port is mounted.