JP3198594B2 - Manufacturing method of decorative parts - 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 decorative component, particularly a decorative component used for a vehicle.

[0002]

2. Description of the Related Art As a decorative component for a vehicle, there is a decorative component in which a trim material such as a bright metal foil is integrated with an outer surface of a synthetic resin molded product serving as a main body of the decorative component. JP-A-1-11
No. 4407 discloses a method of manufacturing a decorative member used as a corner member for mounting a door mirror. Here, a trim material formed by molding a metal plate laminated with a hot melt type adhesive is inserted into an injection mold, a hard resin is injected into the cavity to form the main body resin portion, and at the same time, the trim material is integrated with the trim material. There has been proposed a method of injecting a soft resin so as to cover a peripheral portion and performing double molding.

However, in such a conventional manufacturing method, since the injection pressure of the resin acts on the trim material,
When the trim material is particularly a thin plate, its outer surface is likely to be deformed. The main body is molded by injection molding and integrated with the trim material. At the same time, the main body shrinks when cooled, but the trim material hardly shrinks. There has been a problem that the entire part is easily deformed, and a large internal stress is easily generated so that the entire decorative part is deformed with time.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a method for producing a decorative component having an excellent appearance without causing any deformation or internal stress in the trim material or the decorative component as a whole.

[0005]

The present invention SUMMARY OF] is a method of manufacturing a decorative part on the outer surface decorative trim material are integrated in the main body, it has a melt or soften at the melting temperature of the soft resin
It formed from a material having a rigidity, and trim fitting portion on the outer surface side, and the trim engagement portion of the main body portion having a through hole formed in the vicinity, the hot-melt adhesive
A step of fitting the trim through the made fixing material, a step of setting a body portion which is fitted to trim the injection mold, into the through-holes near the gate to be positioned on the inner surface side of the main body portion, the heating The melted soft resin is injected, and a portion of the soft resin flows from the through hole to the outer surface side to bury one side edge of the trim material, and a portion of the soft resin extends along the inner surface of the main body. To form a soft resin part so as to bury the other side edge of the trim material, and at the same time a hot melt adhesive
And activating the fixing material made of the material to integrate with the main body and the trim material.

[0006]

In the method of manufacturing a decorative component according to the present invention, a trim material is fitted to a trim material fitting portion of a main body portion via a fixing material made of a hot melt type adhesive, and an injection molding die is formed. In the vicinity of the through hole from the gate located on the inner surface side of the main body portion, a heated and melted soft resin is injected, and a part of the soft resin flows from the through hole to the outer surface side to trim the trim material. One side edge is buried, and a part of the soft resin is caused to flow along the inner surface of the main body to form a soft resin part so as to bury the other side edge of the trim material. the resin of heat to activate the solid Chakuzairyo by conduction, by be integrated with the main body portion and trim, to produce a decorative part decorative trim material are integrated on the outer surface of the body portion.

In the above manufacturing method, since the main body and the trim material are formed separately, unlike the conventional method, the injection pressure of the resin for molding the main body is not directly applied to the trim material. No deformation of trim material due to pressure. Further, since the main body and the trim material are fixed by the fixing material in the fitted state, the difference in shrinkage is small, and there is no deformation and no internal stress due to the difference in shrinkage.

Although the injection pressure of the resin is applied during the injection molding of the soft resin portion, it is applied only to the portion embedded with the soft resin, so that no deformation occurs. For this reason, a thin metal foil or the like can be used as the trim material. Although the soft resin part shrinks, the soft resin has flexibility and therefore expands itself, so that the entire deformation and the generation of internal stress are small.

Since the gate for injecting the soft resin is provided on the inner surface side of the main body, no trace of the gate is exposed on the outer surface, and a decorative part having an excellent appearance can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a corner part for mounting a door mirror of a vehicle will be described below with reference to the drawings. FIG.
2A is a front view of a main body used in the embodiment, FIG. 2B is a cross-sectional view taken along line AA, FIG. 2A is a front view of a trim material, and FIG.
Is a cross-sectional view taken along the line BB of FIG. 1, and FIG.
4A is a sectional view corresponding to AA, FIG. 4 is a sectional view similar to CC, and FIG. 5 is a perspective view showing a part of the decorative component.

In FIG. 5, reference numeral 1 denotes a decorative component, which is used as a corner member for mounting a door mirror of a vehicle. The decorative component 1 has a decorative trim material 3 integrated with the outer surface of the main body 2 and soft resin portions 4 and 5 formed so as to cover both side edges of the trim material 3.

As shown in FIG. 1, the main body 2 is formed in a triangular shape so as to be attached to a corner portion of a side window of a vehicle, and an upper portion 2a extending obliquely on an outer surface and a lower portion 2b extending laterally. The protruding trim material fitting portion 11 protrudes from the base 12 along the
Along with a through hole 13 in the vicinity thereof. 14 is an insertion hole of a door mirror stay formed in a large triangular shape in the center of the main body 2, 15 is a mounting hole for mounting the main body 2 to the vehicle body, 16 is a door molding fitting portion, and 17 is a door mirror mounting member. This is the mounting position.

The main body 2 does not melt or soften at the melting temperature of the soft resin forming the soft resin portions 4 and 5, and is integrally formed from a material having relatively rigidity. Examples of such a material include a synthetic resin containing a fiber reinforced material and a metal plate.

As shown in FIG. 2, the trim member 3 has a shallow U-shaped cross section so as to fit into the trim member fitting portion 11 of the main body 2 and has the entire inner surface and side edges of a base material 18. A fixing material layer 19a made of a hot-melt adhesive on the outer surface of the portion;
19b are laminated, and the upper part 3a and the lower part 3b have a structure extending from the corner part 3c.

The base material 18 has a surface different in color from the soft resin parts 4 and 5, and the surface color is determined by design and preference. If a metallic bright color is desired, press or roll molded products such as chrome-plated, metal-deposited resin or metallic molded product, bright aluminum plate, stainless steel plate, etc., or resin extruded with a bright resin film If a molded product or another color is desired, a molded product of a precoated steel sheet having a desired color tone can be used.

The fixing material layers 19a and 19b are activated by heating to fix the hot body for fixing the main body 2 and the base material 18.
A sticking material belt type, hot melt type adhesives can be used <br/>.

In the method of manufacturing the decorative component 1, first, the trim material 3 is put on and fitted to the trim material fitting portion 11 of the main body 2. At this time, the fixing material layer 19a formed on the inner surface of the trim material 3
Is interposed between the main body 2.

Next, as shown in FIGS. 3 and 4, the main body 2 to which the trim material 3 has been fitted is set in an injection mold 20. The injection mold 20 has a cavity 23 between the cavity mold 21 and the core mold 22 into which the main body 2 fitted with the trim material 3 can be inserted, so that the outer surface of the trim material 3 is pressed by the cavity mold 21. Has become. Core type 2
2, a gate 25 for injecting the soft resin 24 from the inner surface side of the main body 2 to the vicinity of the through hole 13 is opened.
It communicates with an injection nozzle (not shown) via a runner 27.

The soft resin part 4 embeds one side edge of the trim material 3, a buried part 4 a that covers the outer surface of the base 12, and extends from the end of the base 11 to the inner side. The soft resin portion 5 includes an embedding portion 5a for embedding the other side edge of the trim material 3, a buffer portion 5b extending around the inner surface of the main body 2, and an intermediate portion thereof. And a lip portion 5c protruding therefrom, and both are connected by a through hole 13 and a bridging portion 6, and the cavity 23 is shaped to form such soft resin portions 4, 5.

Reference numeral 28 denotes a die plate, and reference numerals 29 and 30 denote pins protruding from the cavity mold 21 and the core mold 22 so as to form recesses in the soft resin portions 4 on both sides of the mounting hole 15.

In the injection molding method, first, the main body 2 having the trim material 3 fitted therein is placed on the outer surface side of the trim material 3 with the cavity mold 2.
Set so as to abut on 1 and clamp the mold. Then, the molten soft resin 24 is injected into the vicinity of the through hole 13 from the gate 25 located on the inner surface side of the main body 2 through the runner 27 and the sprue 26.

At this time, a part of the soft resin 23 is
To the outer surface side, presses the main body 2 against the core mold 22, and embeds the soft resin part 4 having the embedded part 4 a, the covering part 4 b, and the buffer part 4 c so as to bury one side edge of the trim material 3. Form. Another part of the soft resin 24 moves along the inner surface of the main body 2 so as to form the bridging portion 6, and the embedding portion 5 a embeds the other side edge of the trim material 3. The soft resin portion 5 having the portion 5b and the lip portion 5c is formed.
In this case Ri by the heat transfer solid Chakuzairyo is activated, the main body portion 2
And the trim material 3, and these and the soft resin parts 4, 5
And are integrated. Thereby, the decorative component 1 is manufactured.
The arrows in FIGS. 3 and 5 indicate the flow direction of the resin.

By opening the mold after cooling, the decorative article 1 shown in FIG. 5 is taken out. Decorative parts 1 thus obtained
Is used to cut off the sprue portion 31 from the gate portion 32 and use it as a corner part of a vehicle door.

The decorative component 1 is attached to a corner portion of a vehicle door by using an attachment hole 15, and a door molding (not shown) is connected to a door molding fitting portion 16. At this time, the buffer portions 4c and 5b and the lip portion 5c abut on the vehicle body panel to perform a buffering and sealing action. In this state, the stay of the door mirror is inserted into the insertion hole 14, and the door mirror mounting member 17 is mounted.

In the decorative component 1 manufactured as described above, the trim member 3 and the soft resin portions 4 and 5 cover the outer surface of the main body 2 to form an excellent decorative surface.

In the above manufacturing method, the main body 2
And the trim material 3 are formed separately, so that the injection pressure of the resin for molding the main body 2 is not directly applied to the trim material 3 unlike the conventional method, and there is no deformation of the trim material 3 due to the resin pressure. . Further, since the main body 2 and the trim material 3 are fixed by the fixing material layer 19a in the fitted state, the difference in shrinkage is small,
The deformation and internal stress due to the difference in shrinkage are small.

Although the injection pressure of the resin is applied during the injection molding of the soft resin portions 4 and 5, it is applied only to the portion embedded with the soft resin 24, so that the outer surface is less deformed. For this reason, a thin metal foil or the like can be used as the trim material 3. Although the soft resin portions 4 and 5 shrink, the soft resin 24 itself expands due to its flexibility, so that the entire deformation and the generation of internal stress are small.

Gate 25 for injecting soft resin 24
Since is provided on the inner surface side of the main body 2, the gate mark is not exposed on the outer surface, and the decorative component 1 having an excellent appearance can be obtained.

In the embodiment, the position of the gate 25 is provided on the inner peripheral side of the outer peripheral edge of the door mirror mounting member 17.
Even when the outer surface side is roughened by the injection of the soft resin 24,
The appearance is not impaired by being covered by the door mirror mounting member 17.

Although the above embodiment relates to a corner member for mounting a door mirror of a vehicle, it can be applied to the manufacture of other decorative parts. In this case, the shapes, structures, materials, and the like of the main body 2, the trim material 3, and the soft resin parts 4, 5 can be arbitrarily changed according to the respective decorative components. In the above embodiment, the fixing material layer 19a is formed on the trim material 3, but the fixing material layer 19c is formed on the trim material fitting portion 11 of the main body 2.
May be formed.

When the outer surface of the main body 2 is covered with the trim material 3 and the soft resin parts 4 and 5 as in the embodiment,
Since the material of the main body 2 does not need to be decorative, a material satisfying only the functional aspect can be used.

[0032]

According to the present invention, the hot melt is applied to the main body.
In a state where the trim material is fitted via a fixing material made of a mold adhesive, it is set in an injection molding die, and a soft resin is injected into the vicinity of the through hole from the back side of the main body, and a part thereof is trimmed from the through hole. Of the trim material along the inner surface side of the main body and the other part of the trim material, so that each side edge is buried. At the same time, the bonding material is activated and the whole is integrated, and the whole is integrated to produce a decorative member. A decorative component that is not exposed and has an excellent appearance can be manufactured.

[Brief description of the drawings]

1A is a front view of a main body, and FIG.
It is sectional drawing.

FIG. 2A is a front view of a trim material, and FIG.
It is B sectional drawing.

FIG. 3 is a sectional view corresponding to AA in FIG. 1 showing an injection molding die.

FIG. 4 is a cross-sectional view corresponding to CC of FIG. 1 showing an injection mold.

FIG. 5 is a perspective view showing a part of a decorative component.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative part 2 Main part 3 Trim material 4, 5 Soft resin part 6 Bridge part 11 Trim material fitting part 12 Base part 13 Through hole 14 Insertion hole 15 Mounting hole 16 Door molding fitting part 17 Door mirror mounting member 18 Base material 19a , 19b, 19c Sticking material layer 20 Injection mold 21 Cavity mold 22 Core mold 23 Cavity 24 Soft resin 25 Gate

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 49/00-49/84 B60J 5/00-5/14 B60R 13/00-13/10

Claims (1)

(57) [Claims] 1. A method for producing a decorative part decorative trim material on the outer surface are integrated in the body portion is molded from a material having a melting or softening to such ITsuyoshi properties at the melting temperature of the soft resin, and the outer Trim mating part on the front side,
Fitting a trim material to a trim material fitting portion of a main body portion having a through hole formed in the vicinity thereof via a fixing material made of a hot melt type adhesive; and a main body portion fitted with a trim material. A step of setting the resin in an injection mold, and injecting a heated and molten soft resin from the gate located on the inner surface side of the main body portion to the vicinity of the through hole, and injecting a portion of the soft resin from the through hole to the outer surface side. One side edge of the trim material is buried by flowing, and a soft resin portion is formed such that a part of the soft resin is caused to flow along the inner surface of the main body portion to bury the other side edge of the trim material. Hot melt adhesive at the same time
Ranaru sticking material by activating a method of producing a decorative part and a step of integrating the main body and trim.