JPH04357100A - Manufacture of decorative belt - Google Patents

Abstract

PURPOSE:To make possible the formation of a decorative object by changing the external exposed width of a brilliant part of the object easily and accurately using a simple constitution without using a cutter used in conventional methods. CONSTITUTION:A decorative belt is extrusion-molded by moving movable dies 11, 12 provided on a molding die 10 properly, and further, is given a molding width of the brilliant part 2a which is variable simultaneously with the extrusion molding process.

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 decorative band, which is formed by covering a bright core material and a transparent body with a synthetic resin and molding the decorative band by extrusion.

0002

2. Description of the Related Art Generally, decorative bands made of extruded products are widely used to improve the appearance of vehicles. This decorative band uses an elongated bright core material with metal vapor deposition applied to the surface of a metal plate or resin film, and the side edge portions of the bright core material are covered with synthetic resin. In the central part of this bright core material, a bright part that exposes the surface of the bright core material to the outside is formed in an elongated shape along the longitudinal direction, and this bright part is used for decoration. This makes it more decorative.

[0003] This type of decorative band includes one in which the surface of the bright core material is directly exposed to the outside to form a bright part, and one in which the surface of the bright core material is provided with a protective transparent body made of resin or the like. However, the metal or resin used as the bright core material is easily damaged and prone to rust. For this reason, the latter decorative band with a transparent body is more preferably used. In manufacturing a decorative band including this transparent body, extrusion is performed while covering the bright core material with a synthetic resin from a resin discharge port of a molding die.

0004

[Problems to be Solved by the Invention] The resin discharge port of the molding die in an extrusion molding device is generally formed into an opening shape of a certain size, and therefore the cross-sectional shape of the decorative band in the direction perpendicular to the extrusion direction also changes. Constantly shaped. For this reason, conventionally, the above-mentioned bright parts are formed so as to be continuous with a constant width in the longitudinal direction, which poses a problem in diversification of designs.

In order to solve this problem, a proposal has been made to vary the external exposure width of the bright portion along the longitudinal direction. For example, in JP-A No. 63-141849, after extrusion molding is performed while a peelable coating is brought into close contact with the surface of a bright core material, a cutter is moved and the coating is applied to different widths along the longitudinal direction. A cut is made, and the coating on the center side is finally peeled off from the cut.

[0006] However, in this method, since incisions are made with a cutter as described above, it is not possible to place a transparent body on the surface of the bright core material. This is because even if you try to install a transparent body, it will be cut. Therefore, the above proposal cannot be applied to a decorative band having a transparent body. Furthermore, there is a risk that the surface of the bright core material may be damaged by the cutter, and in addition, it is actually very difficult to accurately control the movement of the cutter.

Therefore, the present invention aims to increase the external exposure width of the bright part by
An object of the present invention is to provide a method for manufacturing a decorative band that can be easily and accurately changed.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a decorative band in which a decorative band is extruded from a resin discharge port of a molding die while covering a laminate of a bright core material and a transparent body with a synthetic resin. In the manufacturing method of the above, the extrusion molding step of the decorative band is performed by performing extrusion while blocking a part of the resin discharge port of the molding die with a movable die, thereby exposing a part of the surface of the transparent body to the outside. In this bright part forming step, by sequentially moving the movable die in a direction perpendicular to extrusion, the area of the resin discharge port closed by the movable die is changed, and the transparent part in the direction perpendicular to extrusion is changed. The decorative band is configured to vary the externally exposed width of the body surface along the longitudinal direction of the decorative band.

[0009]

[Operation] With the means having such a configuration, extrusion molding is performed while moving the molding die appropriately, and at the same time as the extrusion, the decorative band is molded while changing the molding width of the bright part. .

0010

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, an example of a decorative body formed by applying the present invention will be described. As shown in FIGS. 2(a) and 3(a), it is made of a long thin metal plate or a resin plate. On the surface of the bright core material 1, a similarly elongated protective transparent resin body 2 is adhered to form a laminate. The bottom surface (bottom surface in FIG. 2) and both side surfaces of this laminate are covered with a mounting base material 3 made of synthetic resin. The mounting base material 3 is continuously extruded in the longitudinal direction by a method described later.

Both side edge portions of the outer surface of the protective transparent resin body 2 are partially covered with covering pieces 3a, 3a having a substantially nail-shaped cross section, and the center of the outer surface of the protective transparent resin body 2 The portion is exposed in an elongated shape. This elongated externally exposed portion constitutes a decorative glittering portion 2a.

[0012] Next, an example of an apparatus for implementing the present invention and forming a decorative body as described above will be explained. As shown in FIG. 1, a resin discharge port (not shown) is formed on the front surface of the discharge side of the molding die 10 in the extrusion molding apparatus, and is also shown in FIG. 4(a). As if there were
A movable die 11 covering a part of the resin discharge port,
12 are arranged symmetrically. The resin discharge port is formed of a substantially rectangular opening corresponding to the outer periphery of the cross section of the mounting base material 3 in the decoration body, and a bright part forming fixing piece 10a is provided at the center of the upper edge of the opening. . The lower edge of this bright part forming fixing piece 10a is connected to the protective transparent resin body 2.
The partition edge for extrusion is in sliding contact with the central part of the surface of the

Further, the movable dies 11 and 12 are provided with moving pieces 11b and 12b for forming bright portions that protrude toward the center from their respective base portions 11a and 12a. These bright part forming moving pieces 11b, 12b each protrude toward the center along the upper edge of the opening of the resin discharge port, and each of the bright part forming moving pieces 11b, 12b has a lower edge. A claw-shaped portion corresponding to the outer shape of the covering pieces 3a, 3a of the mounting base material 3 and a linear portion slidingly in contact with the surface of the protective transparent resin body 2 are formed on a continuous extrusion partition side. .

[0014] Then, the above-mentioned moving piece 11b for forming a bright part
, 12b, the covering pieces 3a, 3a of the mounting base material 3 are formed, and the extrusion partition sides of the bright part forming fixed piece 10a and the bright part forming movable piece 1
Extrusion is performed while the surface of the protective transparent resin body 2 is exposed to the outside by the linear partition sides 1b and 12b, and the above-mentioned bright portion 2a is formed in the exposed portion.

The movable dies 11 and 12 are the molding die 10
It is installed so that it can slide in the left and right directions, which are orthogonal to the extrusion direction, while being in close contact with the front surface of the discharge side. The bases 11a, 12a of each of these movable dies 11, 12 are screwed into screw feed rods 13, 14 extending approximately horizontally, and the base ends of these screw feed rods 13, 14 are It is connected to the rotation output parts of drive motors 15 and 16, respectively.

[0016] As described above, the extrusion molding is performed by passing the laminate of the bright core material 1 and the protective transparent resin body 2 through the extrusion molding apparatus, as shown in FIG. A decorative band made of a laminate of a bright core material 1 and a protective transparent resin body 2 covered with a synthetic resin is extruded from a resin discharge port of a molding die 10 through movable dies 11 and 12. Examples in which the present invention is applied to such an extrusion molding process will be described below.

In the extrusion molding process of the decorative band according to the present invention, a part of the resin discharge port of the above-mentioned molding die 10 is connected to the movable die 11.
, 12, and includes a bright part forming step in which the bright part 2a is formed by the movable dies 11, 12.

In the bright portion forming step, the movable dies 11 and 12 are sequentially controlled to move in the direction orthogonal to the extrusion at desired timings in accordance with the extrusion amount. As a result, the closed area of the resin discharge port is changed, and the mounting base material 3
The amount of protrusion of the covering pieces 3a, 3a from the side portions toward the center is changed in the direction perpendicular to the extrusion direction. In other words, Figure 2 (
As shown in a), a decorative band is formed in which the exposed width of the bright portion 2a is varied along the longitudinal direction of the decorative band.

More specifically, X1-X in FIG. 2(a)
In FIG. 3(a), which is one cross section, the forming width of the bright portion 2a is the narrowest, and in this case, as shown in FIG.
As shown in , the movable dies 11 and 12 are brought closest to each other. On the other hand, when forming the brightest part 2a with the widest width, as shown in FIG. 2(b), which is the Y1-Y1 cross section in FIG. 3(b), as shown in FIG. 4(b), The movable dies 11 and 12 are placed in the most separated state as shown in FIG.
has been moved and maintained. Note that the tapered portion in which the width of the bright portion 2a continuously changes corresponds to the portion formed while the movable dies 11 and 12 are moving.

Next, the decorative band shown in FIG. 2(b) is formed by setting the width of the mounting base material 3 in accordance with the width of the bright part 2a, and the width of the bright part 2a is continuous. In the tapered molding, which is changing, the outer width of the mounting base material 3 is also formed into a tapered shape. Specifically, X in FIG. 2(b)
As shown in FIG. 5(a), which is a 2-X2 cross section, in the portion where the bright portion 2a has a narrow width, the outer width of the mounting base material 3 is also formed to have a narrow width. Figure 2
As shown in FIG. 5(b), which is the Y2-Y2 cross section in FIG. It is molded into.

[0021] Also, in this decorative band, the protective transparent resin body 2
A laminate in which the bright core material 1 is embedded is used, and this laminate is used as the movable die 21 shown in FIG.
Extrusion molding is performed by feeding the molded product to an extrusion molding device equipped with 22.

That is, the movable dies 21 and 2 shown in FIG.
The second bright portion forming moving pieces 21b and 22b include the first
A partition side for extrusion similar to that of the embodiment is formed, and a base portion 21a,
A substantially U-shaped extrusion partition side corresponding to the outer side shape of the mounting base material 3 of the decorative body is formed at 22a.

As shown in FIG. 5(a), which is the X2-X2 cross section in FIG. 2(b), when molding the bright portion 2a and the mounting base material 3 with the narrowest width, Figure 6 (
As shown in FIG. 2(a), the movable dies 21 and 22 are brought closest to each other, while Y2-Y2 in FIG. 2(b)
When molding the brightest part 2a and the mounting base material 3 having the widest width shown in the cross section of FIG. 5(b), the method shown in FIG. 6(b) is performed.
The movable die 2 is placed in the most spaced apart state as shown in
1 and 22 have been moved and maintained. The tapered part where the width of the bright part 2a and the mounting base material 3 continuously changes is as follows.
This corresponds to the portion formed while the movable dies 21 and 22 are being moved.

[0024]

[Effects of the Invention] As described above, the present invention performs extrusion molding of a decorative band while appropriately moving a movable die provided in a molding die, and changes the molding width of the bright portion at the same time as extrusion. The external exposure width of the bright portion can be easily and accurately changed with a simple structure without using a conventional cutter or the like.

[Brief explanation of the drawing]

FIG. 1 is an external perspective explanatory view showing an example of an extrusion molding apparatus for forming a decorative body according to the present invention.

FIG. 2 is an explanatory plan view showing a decorative body molded according to the present invention.

FIG. 3 is a cross-sectional view showing the internal structure of the decorative body shown in FIG. 2;

FIG. 4 is an enlarged front view of the molding die.

FIG. 5 is a cross-sectional view showing the internal structure of another decorative body.

FIG. 6 is an enlarged front view of another example of the molding die.

[Explanation of symbols]

1 Bright core material 2 Protective transparent resin body 2a Bright part 3 Mounting base material 3a Covering piece 10 Molding die 11, 12, 21, 22 Movable die

Claims (1)

[Claims] 1. A method for manufacturing a decorative band, in which a laminate of a bright core material and a transparent body is covered with a synthetic resin and extruded from a resin discharge port of a molding die to form a decorative band. The band extrusion molding process includes a bright part forming step in which extrusion is performed while a part of the resin discharge port of the molding die is closed by a movable die, and a part of the surface of the transparent body is exposed to the outside. In the bright part forming step, by sequentially moving the movable die in the direction orthogonal to the extrusion and changing the area of the resin discharge port closed by the movable die, the externally exposed width of the surface of the transparent body in the direction orthogonal to the extrusion is changed to a decorative band. A method for producing a decorative band characterized by changing the longitudinal direction of the decorative band.