JPH0569783A - Molding for vehicle and its manufacture - Google Patents

Abstract

PURPOSE:To dissolve 'streak' and 'recess and projection' appearing at the surface of a molding main body and in addition, prevent the coming-off of weld and increase in manhours due to the weld of a decoration body toward the longitudinal direction of the surface of the molding main body from occurring, and prevent the generation of warping against the molding main body. CONSTITUTION:A molding main body 2 to be formed into hollow by means of blow molding, an outer finish film layer 4 to be joined so as to cover the peripheral wall surface and the surface of the molding main body 2 at the same time as the blow molding of the molding main body 2, and a decoration body 10 to be provided through the outer finish film layer 4 in the surface longitudinal direction of the main body 2, are equipped. The decoration body 10 possesses a beltlike decoration portion 11 and a leg portion 12 integrally, and end caps 15 are put with predetermined openings on both longitudinal end portions of the leg portion 12. At the body 10, its decoration portion 11 is exposed in the surface longitudinal direction of the outer finish film layer 4 of the molding main body 2, and coupling is carried out by embedding the leg portion 12 and both end caps 15 through the outer finish film layer 4 in the surface longitudinal direction of the molding main body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle molding and a manufacturing method thereof.

[0002]

2. Description of the Related Art In order to reduce the weight of a molding for a vehicle, there is a molding in which a molding body is formed into a hollow body by blow molding. In addition, in order to improve the external appearance of the vehicle molding, there is a thing in which a strip-shaped decorative body is attached to the surface of the molding body in the longitudinal direction of the molding by bonding with a double-sided adhesive tape or an adhesive.

[0003]

By the way, in the case where the decorative body is adhered to the surface of the molding body, it is often used for accurately aligning and bonding the decorative body with respect to the longitudinal direction of the surface of the molding body. Need the trouble of. further,
The decorative body is easily peeled off from the molding body at the bonding portion. In order to eliminate the man-hours and adhesion peeling due to the adhesion of the decorative body to the surface longitudinal direction of the mall body,
It is conceivable that the molding body is blow-molded, and at the same time, the decoration body is embedded and bonded in the longitudinal direction of the surface of the molding body. However, when the molding body is blow-molded and the decoration body is embedded in the longitudinal direction of the molding surface of the molding body and bonded to the molding body, a difference in shrinkage occurs between the front surface side and the back surface side of the molding body. That is, since the shrinkage rate on the surface side of the molding body is limited to a small value due to the embedding of the decorative body, the molding body is warped, resulting in a defective product. Also,
In blow molding, when the parison is extruded from the die head or when the parison is air blown, uneven flow of the parison causes "streaks" and "unevenness" on the surface of the molding body.

In view of the above-mentioned problems, an object of the present invention is to eliminate "streaks" and "unevenness" appearing on the surface of the molding body due to unevenness of flow of the parison, and to the longitudinal direction of the molding surface. It is possible to eliminate man-hours and peeling due to adhesion of the decorative body, and to prevent warpage of the molding body, and to manufacture the vehicle molding easily and at low cost. A method of manufacturing a molding for a vehicle is provided.

[0005]

In order to achieve the above object, a molding for a vehicle according to claim 1 of the present invention comprises a molding body formed in a hollow shape by blow molding and molding molding of the molding body at the same time. An exterior film layer joined to the surface and the peripheral wall surface of the main body so as to cover the surface and the peripheral wall surface, and a decorative body attached in the longitudinal direction of the surface of the molding body via the exterior film layer. A vehicle molding, wherein the decorative body integrally has a strip-shaped decorative portion along the longitudinal direction of the molding body, and a leg portion projecting in the longitudinal direction of the back surface of the ornament. End caps are fitted at both ends in the longitudinal direction so as to be movable relative to each other in the longitudinal direction of the legs with a predetermined gap. Is exposed on the surface longitudinal Lum layer,
The leg portion and both end caps are embedded and coupled to each other in the longitudinal direction of the surface of the molding body via the exterior film layer.

According to a second aspect of the present invention, there is provided a method of manufacturing a molding for a vehicle, in which a molding body is formed into a hollow shape by blow molding, and the molding body is blow molded and at the same time the surface and the peripheral wall surface of the molding body are covered. A method for manufacturing a vehicle molding including an exterior film layer joined to a molding body as described above, and a decorative body attached in the longitudinal direction of the surface of the molding body via the packaging film layer. Forming a decorative body integrally having a strip-shaped decorative portion along the longitudinal direction of the decorative portion, and a leg portion projecting in the longitudinal direction of the back surface of the decorative portion Of the first and second blow molding dies and the intermediate dies that are in the mold opening state, the cap fitting process in which the end caps are fitted with a predetermined gap so as to be relatively movable in the longitudinal direction of the legs. A decorative body in which the decorative body is fitted and held in the concave portion formed on the mold surface of the second blow molding mold, and the film material of the exterior film layer is stretched on the intermediate mold side. A film disposing step, a parison extruding step of extruding a parison between the first blow molding die and the film material, and a film material on the intermediate die side being brought into contact with the outer peripheral surface of the parison to develop the parison. A mold clamping step of clamping the first and second blow molding molds through the intermediate mold while clamping the intermediate mold with respect to the first blow molding mold while extending, and closing the mold. By air-blowing the parison in both the first and second blow molds, a hollow molding body is formed and at the same time,
The exterior film layer made of the film material is joined to the surface and the peripheral wall surface of the molding body, and the decoration part of the decoration body is exposed in the state in which the decoration portion of the decoration body is exposed in the surface longitudinal direction of the exterior fulm layer of the molding body. An air blowing step of embedding the leg portions and the end caps at both end portions thereof in the longitudinal direction of the surface of the molding body via the exterior film layer to bond them.

[0007]

In the vehicle molding according to claim 1 configured as described above, at the same time when the molding of the molding body is performed by blow molding, the exterior film layer joined to the surface and the surrounding wall surface of the molding body causes the surface and the surrounding wall surface of the molding body to be By being coated, a vehicle molding having a beautiful appearance in which "streaks" and "unevenness" that deteriorate the appearance do not appear on the surface and the peripheral wall surface can be obtained. Moreover, with respect to the longitudinal direction of the surface of the molding body, the leg portion of the ornament and the end cap fitted with a predetermined gap so as to be relatively movable in the longitudinal direction of the leg portion are embedded and coupled, respectively, When the molding body is contracted by molding, the end caps move relative to both ends of the leg portion in the gap. Therefore, the shrinkage rate on the front surface side of the molding body is restricted to be small due to the embedding of the decorative body, which is solved.

Further, in the method of manufacturing a vehicle molding according to claim 2, the vehicle molding is easily performed through a cap fitting step, a decorative body / film disposing step, a pasolin extruding step, a mold clamping step and an air blowing step. Manufactured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Referring to FIG. 1 showing a vehicle molding in a vertical cross section, FIG. 2 showing a cross section and FIG. 3 showing a perspective view, a vehicle molding 1 includes a molding body 2, an exterior film layer 4, and a decorative body 10. It is composed mainly of. The molding body 2 is made of a thermoplastic synthetic resin such as polypropylene, polyethylene, or a polymer blend of polyphenylene oxide and polystyrene, and is formed in a hollow shape by blow molding. Further, a decorative concave portion 3 is formed on the surface of the molding body 2 from one end to the other end in the longitudinal direction of the molding body 2.

An exterior film layer 4 is integrally bonded to the surface of the molding body 2 including the decorative recess 3 and the peripheral wall surface. The exterior film layer 4 is made of a thermoplastic synthetic resin film having the same material as or compatibility with the molding body 2, and at the same time when the molding body 2 is blow-molded, covers the surface and the peripheral wall surface of the molding body 2. Then, the front surface and the peripheral wall surface of the molding body 2 and the peripheral portion of the back surface 5 of the molding body 2 are integrally joined. When the exterior film layer 4 is a thermoplastic synthetic resin film which is incompatible with the molding body 2, the back surface of the exterior film layer 4 is previously coated with a heat-sensitive adhesive. Moreover, it is desirable to use a weather resistant film for the exterior film layer 4.

On the bottom surface of the decorative recess 3 on the surface of the molding body 2, a strip-shaped decorative body 10 is attached via an outer layer film layer 4. The decorative body 10 is formed by bending a single thin metal plate such as stainless steel or aluminum by roll forming. The decorative body 10 is a hollow flat strip-shaped decorative portion 11 which is slightly shorter than the longitudinal length of the decorative concave portion 3 of the molding body 2 and slightly narrower than the width of the decorative concave portion 3, and the decorative portion 11. 11 is integrally provided with a leg portion 12 which is integrally provided so as to project in the longitudinal direction of the back surface and has a substantially triangular cross section. In addition, the both longitudinal ends of the decorative portion 11 are
So that the cut surface does not damage the appearance,
The inclined surface 13 is pressed. Furthermore, the legs 12
Both ends in the longitudinal direction are cut off by a predetermined length L. Then, as shown in FIG. 7, end caps 15 each having a fitting groove 16 in which the upper side and one side are open and the other side is closed are provided at both ends of the leg portion 12 so as to be relatively movable in the longitudinal direction of the leg portion 12. Are each fitted with a predetermined gap.
The end cap 15 is formed by drawing and pressing a thin metal plate such as stainless steel or aluminum or by injection molding a heat resistant resin. Furthermore, the decorative body 10 is
As shown in FIGS. 1 and 2, the decorative body 11 is exposed from the bottom surface of the decorative concave portion 3 on the surface of the molding body 2, and the leg portion 12 and both end caps 15 are provided with the exterior film layer 4 on the bottom surface of the decorative concave portion 3. They are embedded and connected via each.

The vehicle molding 1 of this embodiment is constructed as described above. Therefore, at the same time as the blow molding of the molding body 2, the surface and the surrounding wall surface of the molding body 2 are covered with the exterior film layer 4 bonded to the surface including the decorative recessed portion 3 of the molding body 2 and the surrounding wall surface, so that the appearance is improved. It is possible to provide the vehicle molding 1 with a beautiful appearance in which no aggravating "streak" or "unevenness" appears on the surface and the peripheral wall surface. The decorative body 1 is attached to the bottom of the decorative recess 3 of the molding body 2.
0 of the leg portion 12 and the end caps 15 fitted into both ends of the leg portion 12 with a predetermined gap S between them.
As shown in FIG. 1, when the molding main body 2 is molded and contracted, the outer film layer 4 is contracted so as to be integral with the molding main body 2 as shown in FIG. The gap S is provided on both ends of the leg portion 12.
At, the end cap 15 moves relatively. Also,
Since the resistance is small in the contact portion between the decorative body 10 and the outer film layer 4 of the molding body 2 excluding the end caps 15, the molding body 2 is displaced due to molding shrinkage. Therefore, the shrinkage rate on the front surface side of the molding body 2 is not restricted to be small due to the embedding of the decorative body 10, and the difference in shrinkage rate between the front surface side and the back surface side in the longitudinal direction of the molding body 2 is eliminated. Therefore, the occurrence of warpage is prevented. Note that FIG.
As shown in, the vehicle moding 1 is attached to the vehicle body 5 by a double-sided adhesive tape or a locking tool.

Next, FIG. 8 and FIG. 1 show a blow molding die apparatus used in the method for manufacturing a vehicle molding of the above-mentioned embodiment.
It will be described according to 0. Blow molding die head 20
A pair of first and second blow molding dies 21 and 22 disposed below the dies are attached to mold clamping plates 23 and 24, respectively, and are subjected to mold clamping and mold opening operations. The first blow molding die 21 is formed with a protrusion 21 a having a flat molding surface 25 corresponding to the back surface of the molding body 2. Also,
An air blower 27 having an air blow needle 26 for blowing air is attached to the first blow mold 21 so as to be able to move forward and backward.

A molding surface 28 corresponding to the surface and peripheral wall surface of the molding body 2 is formed on the second blow molding die 22. Further, the molding surface 28 has a decorative portion 1 of the decorative body 10.
A fitting recess 29 into which 1 is positioned and fitted is formed. On the bottom surface of the fitting recess 29, there is a decorative body 1 for the recess.
A plurality of suction holes 30 for holding 0 by suction are formed. Each suction hole 30 communicates with a negative pressure generating chamber 31 formed in the second blow mold 22.
The negative pressure generating chamber 31 is connected to a negative pressure generating source such as a vacuum pump (not shown) by a pipe connected to a connecting joint 32 opened on the back surface of the second blow molding die 22. When the decorative body 10 is made of a magnetic material, a magnet may be provided instead of the suction hole 30.

The second blow molding die 22 is provided with a fitting hole 40a along the periphery of the molding surface 28 and fitted into the projecting portion 21a of the first blow molding die 21, and has a frame shape. As shown in FIG. 10, 40 is arranged so as to be able to move forward and backward while being connected to the tips of rods 42 of a predetermined number of hydraulic cylinders 41. Then, on the mating surface of the intermediate die 40 with respect to the first blow molding die 21, the peripheral edge portion of the film material 4 ′ for forming the exterior film layer 4 is held by the holding frame body 43.
A holding groove 44 that is fitted through is formed.

The parison 2'pressed by the die head 20 is attached to the lower surfaces of the first and second blow molds 21 and 22.
Pair of parison pinches 3 for holding the lower end of the block closed
3, 34 are provided. Of these parison pinches, at least one of the parison pinches 34 is always urged in the forward direction by the action of the elastic force of the spring 35, and the first and second blow molding dies 21 and 22 are closed. Sometimes parison 2 by both parison pinches 33, 34
The lower end portion of ′ is sandwiched and held closed.

Next, a method of manufacturing the vehicle molding 1 using the blow molding apparatus will be described. (Cap fitting step) First, as shown in FIG. 5, a thin metal plate such as stainless steel or aluminum is bent by roll forming to form a hollow flat flat decorative portion 11 and a back surface longitudinal direction of the decorative portion 11. Long decorative body material 10 'integrally provided with a leg portion 12 having a substantially triangular cross section in the direction
Is formed and cut into a predetermined length. After that, as shown in FIG. 6, both end portions in the longitudinal direction of the leg portion 12 of the decorative body material 10 ′ are cut off by a predetermined length L. Further, as shown in FIG. 7, both ends in the longitudinal direction of the decorative portion 11 of the decorative material 10 'are pressed on the inclined surface 13 to form the decorative body 10. Then, the end caps 15 are fitted into the both ends of the leg portion 12 of the decorative body 10 in the longitudinal direction with predetermined gaps.

(Decorative object / film arranging step) Next, referring to FIG.
As shown in FIG. 10 and FIG. 10, the second blow molding die 2 of the first and second blow molding dies 21 and 22 in the mold open state.
The decorative body 10 in which the end cap 15 is fitted into the fitting concave portion 29 of the second end with a predetermined gap S,
At the same time as the fitting, the surface of the decorative portion 11 is sucked by the suction hole 30, and the decorative body 1 is fitted into the fitting recess 29.
Holds 0. Further, the film material 4 ′ for forming the exterior film layer 4 is fitted and held in the holding groove 44 of the intermediate die 40 at the peripheral edge portion thereof via the holding frame body 43.

(Parison Extrusion Process) The decorative body 10 is disposed in the fitting recess 29 of the second blow molding die 22, and the intermediate die 4
0 is provided with the film material 4 ', and as shown in FIGS. 8 and 10, the parison is provided between the blow molding die head 20 and the film material 4'of the first blow mold 21 and the intermediate mold 40. 2'is extruded by a predetermined length and hung down.

(Mold Clamping Step) When the parison 2'is extruded by a predetermined length, both mold clamping plates 23, 24 are used to clamp the first and second blow molding dies 21, 22 to a predetermined position. On the other hand, the film material 4'of the intermediate mold 40 is brought into contact with the outer peripheral surface of the central portion excluding the upper and lower portions of the parison 2'and spread. Then, as shown in FIG. 11, the fitting hole 40 a of the intermediate die 40 is formed in the protrusion 21 of the first molding die 21.
The mold is clamped to a position where the first blow molding mold 21 and the intermediate mold 40 are brought into contact with each other with the film material 4 ′ sandwiched therebetween. As a result, the central part of the parison 2'excluding the upper and lower parts is the fitting hole 4 of the intermediate mold 40.
0a to pass both the first and second blow molding dies 21 and 22.
Between the molding surfaces 25, 28 of the. Further, while the intermediate die 40 is being fitted to the first blow molding die 21, the lower part of the parison 2'has a pair of parison pinches 33,
While being blocked by 34, air of a predetermined pressure is supplied from the air supply hole 20a of the die head 20 to the internal space of the parison 2'and the parison 2'is pre-blow. As a result, the central portion of the parison 2'excluding the upper and lower portions is held in a tubular shape without being crushed by the pressure contact of the film material 4 '. Then, the parison 2'passes through the fitting hole 40a of the intermediate mold 40 and is arranged between the molding surfaces 25, 28 of the first and second blow molding dies 21, 22.
Subsequently, as shown in FIGS. 9 and 12, both mold clamping plates 23,
By 24, the first and second blow molding dies 21, 22 are clamped to a position where they abut with the intermediate mold 40 interposed therebetween.

(Air blow step) After that, the air blower 27 is advanced by a drive device (not shown), and the air blow needle 26 of the parison 2'in the first and second molds 22 and 23. It rushes into the internal space. here,
Air is supplied to the air blower 27 from an air supply source (not shown), and the air is supplied from the air blow needle 26 to the parison 2
The hollow molding body 2 is formed as shown in FIGS. 9 and 12 by being jetted into the internal space of the ‘′ and blowing the parison 2 ′ with air. At the same time when the molding body 2 is formed, the molding body 2 has a surface and a wall surface, and the molding body 2
The film material 4'is joined to the periphery of the back surface of the. The exterior film layer 4 is composed of the joined film material 4 '. Further, the leg portion 12 of the ornamental body 10 and the end caps 15 at both ends thereof are embedded and coupled to the bottom surface of the ornamental concave portion 3 on the surface of the molding body 2, whereby the vehicle molding 1 is formed. Further, in the mold clamping step and the air blowing step, the air between the parison 2'and the film material 4'is
It is discharged from the air vent groove 45 of the first blow molding die 21.

(Mold open and take-out step) After that, the first and second blow molding dies 2 are formed by the pair of mold clamping plates 23 and 24.
The parison pinches 33 and 34 are opened while the molds 1 and 22 are opened to their original positions. Then, the molding 1 for the vehicle is taken out while a part of the parison thinned on the mating surfaces of the first and second blow molding dies 21, 22 is connected to the molding 1 for the vehicle.

(Removing step) Finally, the film material 4'combined with the vehicle molding 1 taken out.
The vehicle molding 1 of the embodiment shown in FIGS. 1 and 2 is obtained by cutting off a part of the peripheral portion and the thinned parison 2 '.

[0024]

As described above, according to the first aspect of the present invention.
According to the vehicle molding of the above, at the same time when the molding body is blow-molded, the surface and the circumferential wall surface of the molding body are covered by the exterior film layer bonded to the surface and the circumferential wall surface of the molding body, which deteriorates the appearance. It is possible to form a vehicle molding with a beautiful appearance in which no "streaks" or "concavities and convexities" appear on the surface and the peripheral wall surface. further,
The leg portion of the ornament and the end caps at both ends thereof are embedded and bonded to each other in the longitudinal direction of the surface of the molding body through the exterior film layers, respectively. It is possible to eliminate peeling and adhesion. In particular, since the end caps are fitted to both ends of the decorative body with a predetermined clearance, the molding shrinkage of the molding body can be absorbed in the clearance, so that the decoration body is not embedded in the molding body. It is possible to eliminate the restriction that the shrinkage rate on the front surface side is small, and it is possible to prevent warpage due to the difference in the shrinkage rate between the front surface side and the back surface side of the molding body.

Further, according to the manufacturing method of the vehicle molding of claim 2 of the present invention, the man-hours and the adhesion by the adhesion of the decorative body to the surface longitudinal direction of the molding body whose surface and the peripheral wall surface are covered with the exterior film layer are adhered. It is possible to easily and inexpensively manufacture a vehicle molding having a beautiful appearance in which peeling is eliminated and warpage is prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a vehicle molding in an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view of the same.

FIG. 4 is an explanatory view showing a state in which the vehicle molding is similarly received and attached to the vehicle body.

FIG. 5 is a perspective view showing a decorative body material.

FIG. 6 is a perspective view showing a leg portion of the decorative body material with both ends cut off by a predetermined length.

FIG. 7 is a perspective view showing a decorative body.

FIG. 8 is a vertical cross-sectional view showing a state where the first and second blow molds of the blow molding device are opened.

FIG. 9 is a vertical cross-sectional view showing a state where the mold is also closed.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a cross-sectional view showing a state in which the intermediate die is closed with respect to the first blow molding die.

12 is a sectional view taken along line XII-XII in FIG.

[Explanation of Codes] 1 ... Vehicle molding 2 ... Mold body 4 ... Exterior film layer 10 ... Decoration body 11 ... Decoration portion 12 ... Leg portion 15 ... End cap 20 ... Blow molding die head 21 ... First blow molding die 22 … Second blow mold 40… Intermediate mold

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location // B29L 31:58 4F

Claims (2)

[Claims] 1. A molding body which is formed into a hollow by blow molding, and an exterior film layer which is joined to the surface and the peripheral wall surface of the molding body so as to cover the surface and the peripheral wall surface of the molding body simultaneously with the blow molding of the molding body. And a decorative body attached to the surface of the molding body in the longitudinal direction of the surface of the molding body via the exterior film layer, wherein the decorative body is a strip-shaped decorative portion along the longitudinal direction of the molding body. And a leg portion projecting in the longitudinal direction of the back surface of the ornament, and end caps are provided at both ends of the leg portion in the longitudinal direction so as to be relatively movable in the longitudinal direction of the leg portion. The decorative body is fitted with a gap, and the decorative portion is exposed in the longitudinal direction of the surface of the exterior film layer of the molding body, and the legs and both end caps are on the surface of the molding body. Vehicle molding, characterized in that it is coupled with embedded respectively through the outer film layer in the longitudinal direction. 2. A molding body formed into a hollow shape by blow molding, an exterior film layer bonded to the molding body so as to cover a surface and a peripheral wall surface of the molding body at the same time as the molding of the molding body, and the molding. A method for manufacturing a vehicle molding including a decorative body attached in the longitudinal direction of the surface of the main body via the exterior film layer, comprising a strip-shaped decorative portion along the longitudinal direction of the molding main body, and A decorative body integrally formed with a leg portion protruding in the longitudinal direction of the back surface is formed, and ends of the leg portion of the decorative body are provided with predetermined gaps so as to be relatively movable in the longitudinal direction of the leg portion. The cap fitting step of fitting the caps respectively, and the recesses formed on the mold surface of the second blow molding mold of the first and second blow molding molds and the intermediate mold in the mold open state are described above. Decoration Of the decorative body / film disposing step of fitting and holding the film material of the exterior film layer on the intermediate mold side while holding the same in the decorative portion, and the first blow molding mold and the film material. A parison extruding step of extruding a parison in between, while the film material on the side of the intermediate die is brought into contact with the outer peripheral surface of the parison to spread the intermediate die while clamping the intermediate die to the first blow molding die. A mold clamping step of clamping the first and second blow molding dies through an intermediate mold, and air blowing of the parison in the mold closed first and second blow molding dies to obtain a hollow structure. At the same time that the molding body is formed, the exterior film layer made of the film material is bonded to the surface and the peripheral wall surface of the molding body, and the packaging film layer is formed in the longitudinal direction of the exterior fulm layer of the molding body. An air blowing step of embedding and bonding the leg portions of the decorative body and the end caps at both ends thereof in a state where the decorative portion of the body is exposed, by embedding them in the longitudinal direction of the surface of the molding body through the exterior film layer. A method of manufacturing a molding for a vehicle, comprising: