JP3011301B2 - Manufacturing method of automotive 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 for manufacturing a long automobile molding to be mounted together with a metal core on a vehicle body panel.

[0002]

2. Description of the Related Art In general, a molding serving as a sealing material and a decorative material is attached to an edge of a window glass attached to a window opening of a body panel of an automobile, a body panel or a roof panel. . For example, between the peripheral end surface of the window glass and the opening edge of the window opening of the vehicle body panel, an elongated gap is continuously formed from the side portion to the upper portion, and in this elongated gap, The sealing and decoration of the gap are performed by inserting a long molding body. In addition, a long molding is often inserted into an elongated gap formed from a side edge of the window glass to a side portion of the roof panel, a side portion of the body panel or a side edge portion of the roof panel. I have.

[0003] Such an automobile molding that is continuously mounted on a vehicle body panel has a decorative portion that covers the outer surface of the vehicle body panel in a belt shape, and a decorative portion that extends from the inner surface of the vehicle toward the back side of the vehicle body panel. It has a mounting portion that is protruded and fitted and fixed.
In the manufacturing method of the molding described in Japanese Patent No. 42525, first, a molding material having a constant width is extruded by using a metal profile having a constant cross-sectional shape, and then the molding material is cut and bent to form a longitudinal direction. The width in the direction perpendicular to the width is changed. Also, when mounting on a vehicle body panel, a linear molding is subjected to an axial bending process to form a molding having a non-linear portion.

On the other hand, US Pat. No. 5,096,460 describes a molding in which a metal core is fixed to a vehicle body panel side with bolts, clips, or the like. In this case, the width of the metal core is reduced. It changes in the longitudinal direction.

[0005]

However, when a molding having a metal core material and having a changed cross-sectional shape is axially bent as described above, the dimensional accuracy with respect to the vehicle body panel and window glass is reduced, and the molding is reduced. In some cases, there is a problem in the mounting property, that is, the sealing property and the decorative property. For example, "Introduction to press work" (Industry Research Council 1982
“Tension press working” as described on page 229 of “Year” is a useful technique for bending an axis of a molding, but there are variations in the timing of the start of stretching and the balance in the horizontal direction of the cross section. In many cases, the shape often deviates from the original shape.

In order to solve this problem, the molding material may be subjected to an axial bending process in advance, and then the cross-sectional shape may be determined by cutting. However, in this case, it is difficult to actually carry out the method for reasons such as material accuracy, die accuracy, and die-cutting accuracy. Further, from the viewpoint of the space for carrying and storing the molding, it is preferable that the axial bending is performed as far as possible.

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a molding for automobiles which can easily improve the dimensional accuracy of a molding containing a metal core whose cross-sectional shape changes and is formed non-linearly by axial bending. It is intended to provide a manufacturing method.

[0008]

According to the present invention, there is provided a method of manufacturing a molding for an automobile, comprising the steps of:
A metal core material having an irregular cross-sectional shape and a molding made of a resin material covering the metal core material, and are formed by extruding a molding material in a straight line through a die. By performing an axial bending process on a molding material, a method of manufacturing a molding for automobiles in which a molding having a linear portion and a non-linear portion is formed, wherein the die has a uniform and linear cross-sectional shape. Extruding the resin material so as to cover the metal core material while continuously feeding the metal core material, and then cutting to a predetermined length to obtain a linear molding material; Of the molding material is cut off by leaving a certain area of the straight portion that is not subjected to the axial bending process. The step of changing the shape in the longitudinal direction and, while fixing and holding a certain area of the straight portion that has not been cut off, applying an axial bending process to the straight molding material, the straight portion and the non-linear shape A step of obtaining a molding having a portion, and a step of removing the certain region from the axially bent molding.

[0009]

According to the method of manufacturing a molding for an automobile having such a configuration, a predetermined area of a predetermined linear portion is fixed when the molding material is subjected to the axial bending.
Since the molding material is held, the axis bending process is performed while the entire molding material is accurately held at a fixed position. Therefore, the axial bending process is performed with high accuracy, and a molding with good dimensional accuracy can be obtained.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. In an example in which a front window molding manufactured according to the present invention is mounted on an automobile, a front window formed by a front edge of a roof panel 1 and a front edge of a pillar panel 2 as shown in FIG. 1, for example. A front window glass 3 is fixed to the inner peripheral edge of the frame opening from the outdoor side. An elongated gap is continuously formed between the peripheral edge of the front window glass 3 and the inner peripheral edge of the window frame opening of the vehicle body panels 1 and 2 so as to cover the elongated gap. And a long molding body 4 is attached.

The molding body 4 includes an upper molding portion 4
A, a corner molding section 4C and a side molding section 4B are provided, and are mounted from the upper edge of the front window glass 3 to the both side edges through the corner edge.
The shape and mounting structure of the molding body 4 will be described with reference to FIG.

First, the front edge portions of the roof panel 1 and the pillar panel 2 are bent stepwise so as to have a step recessed toward the indoor side (the lower side in FIG. 2). Flanges 1b and 2b are provided via 2a. The outer surfaces of the flange portions 1b and 2b (FIG. 2)
On the upper side surface), the front window glass 3 is placed at a fixed height via a dam rubber 6, and the peripheral edge of the front window glass 3 is connected to the indoor side bent portions 1a and 2a. And are arranged facing each other at a constant interval. An adhesive 7 is filled in a space defined by the front window glass 3, the indoor bent portions 1a and 2a, and the flange portions 1b and 2b. The 6 side and the 1b and 2b sides are fixed.

The molding body 4 is composed of a metal core material 41 having an irregular cross-sectional shape and a resin molding 42 covering the outer surface of the metal core material 41 on the vehicle outside. This mall body 4
Is attached via a clip or the like (not shown) so as to bridge between the outer peripheral surface edge of the front window glass 3 and the vehicle body panels 1 and 2. The gap between 1 and 2 is covered from the outside of the vehicle. The resin molding 42 has an inner peripheral lip 4 which is in contact with the outer surface of the front window glass 3.
21 and an outer peripheral lip 422 abutting on the outer surface of the vehicle body panels 1 and 2 over the entire length, and the inner peripheral lip 4 extends from the corner to the side.
A dam lip 423 is provided at a position directly above 21. The metal core 41 is disposed along the inner surface of the resin molding 42 and has a substantially L-shape at the side and corner portions, and a substantially U-shape at the upper portion. Each of the inner and outer peripheral portions on the inner surface of the metal core material 41 has a locking piece 4 fitted to a clip (not shown).
11 and 412 are provided.

Here, from the upper molding part 4A to the middle part of the corner molding part 4C, it has a constant cross-sectional shape, and is mounted along the gap between the front window glass 3 and the vehicle body panel 1. I have. The inner peripheral lip 421 and the outer peripheral lip 422 of the resin molding 42 from the upper molding part 4A to the middle part of the corner molding part 4C are arranged at substantially diagonal positions of the substantially U-shaped metal core material 41.

On the other hand, the side molding section 4B is continuously mounted from the upper molding section 4A to the lower side of the pillar via the corner molding section 4C. The height of the indoor side bent portion 2a at the side portion is formed to be higher than the indoor side bent portion 1a of the roof panel 1 described above. That is, the indoor side bent portion 2
“a” gradually starts rising from the middle of the corner portion toward the side portion, and is raised to the maximum height state at the upper end portion near the corner of the side portion.
At this time, the front window glass 3 is fixed at a fixed height with respect to the flange portion 2b. Therefore, a step formed between the vehicle exterior surface (upper side surface in FIG. 2) of the pillar panel 2 and the vehicle exterior surface of the front window glass 3 is caused by the rise of the indoor side bent portion 2 a, resulting in a corner portion. It is enlarged from the middle to the side part.

Further, from the middle of the corner molding section 4C to the side molding section 4B, the upper molding section 4A
Is formed in a cross-sectional shape different from the cross-sectional shape of
The above-described dam lip 423 is provided on the opposite side of the outer peripheral lip 422. A plate-like wall portion 424 is provided between the dam lip 423 and the inner peripheral lip 421.
A rainwater receiving gutter 425 having a substantially L-shaped cross section is defined between the dam lip 423 and the inner peripheral lip 423. The rainwater receiving gutter 425 is provided so as to protrude outward from the side edge of the front window glass 3 and has a function of collecting water on the front window glass 3. From the part 4B to the middle of the corner molding part 4C, it continues along the side edge of the front window glass 3 and disappears at almost the center part of the corner part. The rising height of the plate-like wall portion 424 from the glass surface is changed in accordance with the above-described step change on the vehicle body panel side, and the rising height of the plate-like wall portion 424 causes the rainwater receiving gutter to change. The groove width and cross-sectional area of 425 have changed.

An embodiment of the molding method of the present invention for molding such a molding 4 will be described below. In order to form the molding 4, the molding material is first linearly extruded through a die of an extrusion molding device, and then the upper molding 4A, the corner molding 4C and the side molding 4 are formed.
B is cut so as to form each cross-sectional shape, and then a linear molding material is subjected to an axial bending process,
A straight upper molding portion 4A, and non-linear corner molding portions 4C and side molding portions 4B are formed.

Prior to the extrusion molding, the metal core 41 is formed into a deformed cross-sectional shape as shown in FIG. 3 by, for example, a forming roll or the like, and is formed into a profile having a constant cross-sectional shape in the longitudinal direction. . The linear metal core material 41 having a constant cross section is continuously fed to a die of an extrusion molding device, and is extruded by a resin molding 42. By this extrusion molding, as shown in FIG. 4, the resin molding 42
And a linear molding material is obtained.
This linear molding material is cut at a predetermined length. Note that a clip (not shown) is attached to the space indicated by reference numeral 413 in FIG.

The linear molding material has a constant cross-sectional shape over its entire length, but is cut as shown in FIG. 5 in order to change the cross-sectional shape in the longitudinal direction. The cross-sectional shape after the resection is shown in each of FIGS. 6 to 9. First, in the upper molding part 4A shown in FIG. 6, after the resection as shown in FIG. 6
The inner peripheral wall is bent and raised as indicated by the arrow in the middle. Further, a portion of the corner molding portion 4C near the upper portion shown in FIG. 7 is cut into a substantially C-shaped cross section.

Further, from the middle of the corner molding section 4C to the side molding section 4B, cutting is performed so that the rising height of the plate-like wall section 424 gradually increases as shown in FIG. However, no excision is performed at the end corresponding to the corner of the side molding 4B. That is, the corner molding portion 4C is a portion to be formed into a non-linear portion by an axial bending process described later, and the end corresponding to the corner of the side molding portion 4B close to the non-linear portion is Is a portion to be formed into a linear portion without being subjected to axial bending. The molding material is left in the same cross-sectional shape without being cut off in a certain region of the linear planned portion close to the non-linear planned portion.
Specifically, as shown in FIG. 8, a fixed portion 426 for performing an axial bending process described below does not cut off the plate-shaped wall portion 424 in a certain region of the straight portion. It is provided by leaving it as it is.

The molding material whose cross-sectional shape has been changed by such cutting is bent into a shape that can be mounted on a vehicle body panel as shown in FIG. 10 by axial bending. This axis bending process is performed by, for example, the above-described “tensile press process”.
The fixing portion 426 is fixed and supported by a chuck or the like. As a result, the entire molding material is held at a fixed position so as not to be shifted in any of the left and right directions. That is, the axis bending process is performed without displacement by rotating the molding material after fixing both ends thereof with a chuck or the like.

At this time, the fixing portion 426 is deformed by the above-mentioned axial bending, but after the completion of the axial bending, FIG.
As shown in FIG. 1, it is cut off and separated from the main body side to form a cross-sectional shape as shown in FIG. In the upper molding portion 4A, the inner peripheral wall portion is further bent inward as indicated by the arrow in FIG.
As a result, locking pieces 411 and 412 that fit into clips (not shown) are formed in the space 413.

The molding material thus axially bent is mounted and arranged in an injection mold, and an inner peripheral lip 42 is formed on the corner molding portion 4C and its vicinity as shown in FIGS. It is shaped. At this time, the upper molding part 4A and the corner molding part 4C
As shown in FIGS. 15, 16 and 17, the inner peripheral lip 421 is formed by injection molding, and the side molding portion 4B is separately formed in advance as shown in FIG. The inner lip 421 is formed by sticking.

In the embodiment having such a configuration, when the molding material is subjected to the axial bending process, the fixing portion 426 provided at the portion corresponding to the side molding portion 4B which is the non-linear portion is fixed and supported. Therefore, the entire molding material is accurately held at a fixed position during the axial bending. Therefore, the axial bending process is performed with high accuracy, and a molding with good dimensional accuracy can be obtained.

The present invention can be similarly applied to all other moldings such as moldings for rear window glass.

[0028]

As described above, according to the present invention, after the molding material is cut so as to change the cross-sectional shape of the molding material in the longitudinal direction, the fixing portion provided on the predetermined linear portion is supported. Since the axis bending process is performed and the entire molding material is accurately held at a fixed position during the axis bending process, the accuracy of the axis bending process is improved and the molding dimensional accuracy of the molding is easily improved. In addition, the space for carrying and storing the molding can be reduced, and productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing the appearance of a vehicle to which the present invention is applied, viewed from the front side.

FIG. 2 is a sectional view taken along the line AA in FIG. 1 showing a structure near a corner of a molding for an automobile according to an embodiment of the present invention;
It is a partial cross-sectional perspective view along a line.

FIG. 3 is a partially enlarged perspective view showing a metal core material used for the automobile molding shown in FIG. 2;

FIG. 4 is a partially enlarged perspective view showing a molding material in which a resin core is coated on the metal core material shown in FIG. 2;

FIG. 5 is a perspective view in which the molding material shown in FIG. 4 is cut away to change the cross-sectional shape in the longitudinal direction.

FIG. 6 is a transverse sectional view taken along line BB in FIG.

FIG. 7 is a transverse sectional view taken along the line CC in FIG. 5;

FIG. 8 is a transverse sectional view taken along the line DD in FIG. 5;

FIG. 9 is a transverse sectional view taken along line EE in FIG. 5;

FIG. 10 is a perspective view showing a state after the molding material shown in FIG. 5 is axially bent.

FIG. 11 is a perspective view showing a state in which a fixing part is cut off from the molding material shown in FIG. 10;

FIG. 12 is a transverse sectional view taken along line FF in FIG. 11;

FIG. 13 is a transverse sectional view taken along line GG in FIG. 11;

FIG. 14 is a perspective view illustrating a state where the vicinity of a corner of the molding material illustrated in FIG. 11 is formed by injection molding.

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

FIG. 16 is a transverse sectional view taken along line II in FIG. 14;

FIG. 17 is a transverse sectional view taken along the line JJ in FIG. 14;

FIG. 18 is a transverse sectional view taken along the line KK in FIG.

[Description of Signs] 1 roof panel 2 pillar panel 3 front window glass 4 molding body 4A upper molding part 4B side molding part 4C corner molding part 41 metal core material 42 resin molding 426 fixing part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29D 31/00 B29C 69/00 B60R 13/04

Claims (1)

(57) [Claims] 1. A method for molding a molding comprising a metal core material having an irregular cross-sectional shape and a resin material covering the metal core material, and extruding the molding material linearly through a die. By performing an axial bending process on the linear molding material, a method of manufacturing a molding for automobiles in which a molding having a linear portion and a non-linear portion is formed, wherein the die has a cross-sectional shape A step of extruding the resin material so as to cover the metal core material while continuously feeding a constant and linear metal core material, and then cutting to a predetermined length to obtain a linear molding material, In the obtained linear molding material, excision is performed by leaving a predetermined area of a predetermined linear portion where the axial bending process is not performed, so that molding is performed. A process of changing the cross-sectional shape of the molding material in the longitudinal direction, and performing an axial bending process on the linear molding material while fixing and holding a fixed area of the linear portion where the above-mentioned cutting was not performed. A method for manufacturing a molding for an automobile, comprising: a step of obtaining a molding having a portion and a non-linear portion; and a step of removing the certain region from the molding subjected to the axial bending.