JPH0790586B2 - Molding manufacturing method and 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 of manufacturing a molding and an apparatus therefor, and in particular, a thermoplastic synthetic resin is variably extruded through a constant extrusion opening of an extrusion die to form an upper molding and left and right side moldings having different cross-sectional shapes. The present invention relates to a method and an apparatus for manufacturing a molding that integrally forms and.

[0002]

2. Description of the Related Art In a conventional front glass molding of this type of vehicle, a recess for inserting a glass panel is provided in the left and right side moldings, and a rainwater guiding recess is provided above the recess, and an upper molding is provided. Is provided only with a concave portion into which the glass panel is fitted, and the left and right side moldings and the upper molding are formed with different cross-sectional shapes. Therefore, in order to form the side molding and the upper molding having different cross-sectional shapes, for example, as in the molding described in JP-A-63-291721, extrusion of a constant cross-sectional shape is performed according to the shapes of the left and right side moldings. After the operation, there is an upper molding in which the legs and the upper supporting protrusions are cut off to form a desired shape as the upper molding. Further, there is also a molding main body composed of two moldings, a main molding and a sub-molding, only the main molding is used for the upper molding, and the left and right side moldings are combined with the main molding and the sub-molding.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional molding, since a certain cross-sectional shape must be extruded and then cut into a desired shape, a notch step must be added, and the notch is troublesome. There is a drawback in that a notch member is generated, which is uneconomical. Further, in a molding composed of a main molding and a sub-molding, two moldings have to be extruded, resulting in an increase in manufacturing cost and a drawback that the combination of the main molding and the sub-molding is troublesome.

An object of the present invention is to easily and inexpensively manufacture a molding having an upper molding and left and right side moldings having different cross-sectional shapes by changing the cross-sectional shape of the extrusion opening of the extrusion die and performing extrusion molding. It is an object of the present invention to provide a method of manufacturing a molding and an apparatus therefor capable of accurately obtaining a desired shape by allowing unnecessary synthetic resin to escape and keeping the extrusion amount constant by changing the cross-sectional shape of the portion.

[0005]

According to the method of manufacturing a molding according to the present invention, the left and right side moldings have a head, a thick bulge, a leg, and a supporting protrusion in an extrusion mold. In order to enlarge the formed extrusion opening and form a recess for rainwater guide on the side of the thick bulging portion, a part of the thick bulging portion in the enlarged extrusion opening is closed and closed. Extrusion molding is performed so that the synthetic resin of the part that is separated from the synthetic resin of the molding escapes and further, in the upper molding, the extrusion opening is reduced so that it has only the head, legs, and supporting protrusions The continuous extrusion is performed so as to separate the synthetic resin of the above portion from the synthetic resin of the molding and allow it to escape.

In the molding manufacturing apparatus according to the present invention, movable moldings are movably disposed in the extrusion opening formed in the die of the extrusion die so that the cross-sectional shape of the extrusion opening can be changed, and the left and right side moldings are provided. The extrusion opening to form the head, the thickened bulge, the leg, and the enlarged position having the supporting protrusion, and the extrusion opening to form the upper molding, the head and the leg. And a movable molded body that can be moved to a reduced position having a supporting protrusion, and an escape hole is formed in the movable molded body to separate excess synthetic resin from the synthetic resin of the molding and to escape at the reduced position of the extrusion opening. Then, on the discharge side of the extrusion die, a movable cutting body for forming a recess for rainwater guide is movably attached to the side of the thick bulging portion, and the movable cutting body is attached to the thick bulging inside the extrusion opening. Can be moved to the extension position where a part of the protrusion is cut out And the escape hole releasing the unnecessary synthetic resins notch in its extended position is obtained by forming the movable cutting member.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method and apparatus for manufacturing a molding of the present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings.

The front glass molding 1 manufactured by the method of the present invention is interposed between the vehicle body panel 2 and the glass panel 3 at the front part of the vehicle and attached with the adhesive 4. It is formed by integrally performing variable extrusion molding in the form of a vertically elongated strip by the molding apparatus described in 1. The molding 1 includes left and right side moldings A (see FIG. 4) mounted between the left and right side edges of the glass panel 3 and the front pillar portion of the vehicle body panel, the upper edge of the glass panel 3 and the upper roof portion of the vehicle body panel 2. It is composed of an upper molding B to be mounted between the upper and lower moldings, and a corner molding C for connecting the left and right side moldings A and the upper molding B. A, B and C are continuously extruded and integrally formed by the method of the present invention as described below.

The left and right side moldings A of the front glass molding 1 are composed of a head portion 6 having a thick bulging portion 5 as shown in FIG. 1, and leg portions 7 extending vertically downward from the head portion 6. The thick bulging portion 5 is provided with a recess 8 for guiding rainwater, and the supporting projection piece 9 of the glass panel 3 is attached to the lower end of the leg portion 7. The supporting projecting piece 9 and the thick bulging portion are formed. 5, a concave portion is formed between the concave portion and the glass panel 5, and the glass panel 3 is fitted into the concave portion. Therefore, in the left and right side moldings A, the glass panel 3
A concave portion for draining rainwater is formed on the concave portion into which is inserted, and is formed as a grooved molding having two upper and lower tiers.

As shown in FIG. 2, the upper molding B of the molding 1 is composed of a head portion 6 and a leg portion 7 extending vertically downward from the head portion 6, and the glass panel 3 is attached to the lower end of the leg portion 7. A supporting projection piece 9 is attached, a concave portion is formed between the supporting projection piece 9 and the head portion 6, and the glass panel 3 is fitted into the concave portion. Therefore, the upper molding B has the thick bulging portion 5
Is different from the left and right side moldings A in that there is no groove for draining rainwater.

The corner molding C (see FIG. 4) connects the left and right side moldings A and the upper molding B. The thickness of the corner molding C is tapered from the left and right side moldings A to the upper molding B. , Thick-walled bulging portions 5 provided on the left and right side moldings A
Is tapered toward the upper molding B, and finally the thick bulging portion 5 is removed to connect to the upper molding B.

Next, a method and apparatus for manufacturing the molding 1 will be described. As shown in FIG. 3, the molding apparatus comprises an extrusion die 10, and the extrusion die 10 has a die 11 on its discharge side. Inside the die 11, the head 6 of the molding 1 and the thick bulging portion 5 are formed. The leg portion 7 and the extrusion opening 12 that forms the support protrusion piece 9 are formed. A rectangular opening 13 having a diameter larger than that of the extrusion opening 12 is formed in the base 11 below the extrusion opening 12, and the extrusion opening 12 is connected to the rectangular opening 13 via a shoulder 14 of the base 11. It is in communication. The movable molded body 15 having the base portion 16 which is fitted in the rectangular opening portion 13 and moves up and down is formed by the extrusion opening portion 12.
A movable shaft 17 is attached to the lower surface of the base 16, and the movable shaft 17 of the movable molded body 15 passes through a fixed plate 18 attached to the lower end of the base 11 so as to close the rectangular opening 13. It is connected to the rotating shaft of a motor 19 attached to 18. Therefore, the movable molded body 15 can be moved up and down in the extrusion opening 13 via the moving shaft 17 by the rotation of the motor 19.

The movable molded body 15 is connected to the left and right side moldings A of the molding 1 at a predetermined position in the extrusion opening 13.
The upper molding B is shaped so that it can be molded, and as shown in FIG. 3, the movable molding 15 is moved until the base 16 of the movable molding 15 contacts the shoulder 14 of the rectangular opening 13 by the rotation of the motor 19. At the position moved up along the inside of the extrusion opening 13, the extrusion opening 13 is in the contracted position, and the head 6 and
A cross-sectional shape of the upper molding B of the molding 1 having the leg portions 7 and the supporting protrusions 9 is formed, and the portion of the upper molding B of the molding 1 can be extruded.

As shown in FIG. 5, the motor 19 is rotated to push the movable molded body 15 through the moving shaft 17 until the lower end of the base 16 of the movable molded body 15 comes into contact with the fixed plate 18. The extrusion opening 12 is in the enlarged position at the position where the head 6 is provided with the thick-walled bulging portion 5 at the position where it is moved down along the inside.
And the leg portion 7 and the supporting projection piece 9 have a cross-sectional shape of the molding 1, but have a cross-sectional shape of the left and right side moldings A of the molding 1 in which the recesses 8 for rainwater drainage are not formed. It is possible to extrude the left and right side moldings A of the molding 1 that do not have the recessed portion 8 for draining rainwater at the enlarged position of the portion 12.

In order to form recesses 8 for draining rainwater on the left and right side moldings A of the molding 1, the die 1 of the extrusion die 10 is formed.
As shown in FIG. 7, a movable cutting body 20 is attached to the discharge side of No. 1 and the movable cutting body 20 has a cutting portion 21 extending into an extrusion opening 12 formed in a die 11 of the extrusion die 10 and an extrusion die 10. Has a base portion 23 that moves along a frame body 22 attached to the end surface of the base 11. The end portion of the base portion 23 is connected to the rotation shaft of a motor 24 attached to the frame body 22 through the frame body 22. A moving shaft 25 is attached. The movable cutting body 20 is placed in the enlarged position of the extrusion opening 12, and is moved from the position of FIG. 7 to the position of FIG. 9 via the moving shaft 25 by the rotation of the motor 24. At the position of FIG. A part of the extrusion opening 12 that extends into the portion of the extrusion bulge 5 of the extrusion opening 12 so that the cutting portion 21 can cut the thick bulge 5 to form a recess 8 for draining rainwater. And the left and right side moldings A having the recesses 8 for draining rainwater are extruded. The movable cutting body 20 can adjust the depth of the recess 8 for draining rainwater by adjusting the extending length thereof, and the shape of the recess 8 for draining rainwater can be adjusted by the shape of the cutting portion 21.

The extrusion molding of the corner C is performed during the moving process of moving the movable molding 15 from the contracted position of the extrusion opening 12 to the expanded position or from the expanded position to the contracted position.

In the present invention, since the molding shape between the expanded position and the contracted position of the extrusion opening 12 has the thick bulging portion 5 at the expansion position of the extrusion opening, the left and right side moldings A are the upper moldings. Since the extrusion amount of the synthetic resin of the extrusion die 10 is constant at the reduced position of the extrusion opening 12 for extruding the upper molding B having a larger cross-sectional area than that of B, the upper molding B is more than the Nerai cross-section. Will also grow. Therefore, in order to stably perform the extrusion molding of the upper molding B having a small cross-sectional area according to the Nerai cross-section, the movable molding 15 fitted into the extrusion opening 12 has the extrusion opening 1
At the reduced position of 2, an escape hole 26 for separating the excess synthetic resin from the synthetic resin of the molding 1 and sending it out from the extrusion die 10 is formed. By discharging the excess synthetic resin from the escape hole 26, The exact shape of the upper molding B can be extruded as desired.
Similarly, at the enlarged position of the extrusion opening 12, the thick bulging portion 5
The movable cutting body 20 having the recessed portion 8 for notifying the rainwater formed by cutting out the side portion thereof is also formed with an escape hole 27 for cutting the anxious synthetic resin and discharging it from the extrusion die 10 to the outside.

[0018]

EFFECTS OF THE INVENTION The present invention has the above-described structure, and therefore does not require a step such as cutting, and does not have extrusion molding of two moldings, a main molding and a sub-molding. It can be molded in a series, and the desired shape of each molding can be accurately obtained by allowing unnecessary synthetic resin to escape by changing the cross-sectional shape of the extrusion opening and always maintaining a constant extrusion amount. It is possible to easily and inexpensively manufacture the molding having the discharge groove.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of left and right side moldings in which a molding manufactured by the method of the present invention is interposed between a vehicle body panel and a glass panel.

FIG. 2 is a vertical sectional view of an upper molding similar to FIG.

FIG. 3 is a front view showing a state where the movable molded body of the device according to the present invention has moved to the contracted position of the extrusion opening.

FIG. 4 is an explanatory view of a molded product manufactured by a process in which the movable molded body of the device according to the present invention moves from the contracted position of the extrusion opening to the expanded position, and the movable cut body moves to its extended position.

FIG. 5 is a front view showing a state in which the movable molded body of the apparatus according to the present invention has moved to the enlarged position of the extrusion opening.

FIG. 6 is a side view of FIG.

FIG. 7 is a front view showing a state in which the movable cutting body of the device according to the present invention is attached to the discharge side of the extrusion die.

FIG. 8 is a side view of FIG. 7.

FIG. 9 is a front view showing a state in which the movable cutting body of the device according to the present invention is stretched so as to close the extrusion opening.

[Explanation of Codes] 1 Molding 2 Body panel 3 Glass panel 4 Adhesive 5 Thick bulging portion 6 Head 7 Leg 8 Concave 9 Support protrusion 10 Extrusion die 11 Mouth 12 Extrusion opening 13 Rectangular opening 14 Shoulder 15 movable molded body 16 base portion 17 moving shaft 18 fixed plate 19 motor 20 movable cutting body 21 cutting portion 22 frame body 23 base portion 24 motor 25 moving shaft 26 escape hole 27 escape hole A left right side portion B upper portion C corner molding

Claims (2)

[Claims] 1. A method for manufacturing a molding having an upper molding and a left and right side moldings having different cross-sectional shapes by variably extruding a thermoplastic synthetic resin through a constant extrusion opening of an extrusion die, the left and right side moldings. In order to enlarge the extrusion opening so as to have the head portion, the thick bulging portion, the leg portion, and the supporting projecting piece, and to form the rainwater guiding concave portion on the side portion of the thick bulging portion. Part of the thick bulging part in the expanded extrusion opening is closed, and the synthetic resin of the closed part is extruded so as to be separated from the synthetic resin of the molding and escaped. A molding which is characterized in that the extrusion opening is reduced so as to have only the legs and the supporting protrusions, and the reduced portion of the synthetic resin is separated from the synthetic resin of the molding and is continuously extruded. Manufacturing method. 2. A device for producing a molding having an upper molding and a left and right side moldings having different cross-sectional shapes by variably extruding a thermoplastic synthetic resin through a constant extrusion opening of the extrusion die. A movable molded body is movably fitted to the extrusion opening formed inside so that the cross-sectional shape of the opening can be changed, and the extrusion opening has a head and a thick wall expansion to form left and right side moldings. Movable molded body in an enlarged position having a projecting portion, a leg portion, and a supporting protrusion piece, and an extrusion opening having a head portion for forming an upper molding, a leg portion, and a contracted position having only the supporting protrusion piece. Can be moved,
The movable molding is formed with an escape hole for separating the excess synthetic resin from the synthetic resin of the molding and allowing it to escape at the reduced position of the extrusion opening, and the side of the thick bulging portion is provided on the discharge side of the die of the extrusion die. A movable cutting body for forming a recess for rainwater guidance is movably attached to the movable cutting body, and the movable cutting body can be moved to an extending position where a part of the thick bulging portion in the extrusion opening is cut out. An apparatus for manufacturing a molding, characterized in that an escape hole for escaping a notched unnecessary synthetic resin is formed in a movable cutting body.