JPH0724873A - Transfer film - Google Patents

Abstract

PURPOSE:To mold a resin part having patterns rich in three-dimensional feeling, in a transfer film wherein a pattern part is bent to a plane part and a vertical wall part by the injection pressure of a resin to be transferred to the rear surface of the resin part, by applying metal vapor deposition to the part becoming the plane part and applying spreadable painting to the part becoming the vertical wall part. CONSTITUTION:A transfer film 31 has a flexible base film 32 and a metallized surface part 35 for a plane part is provided to the part becoming the plane part of a pattern part and a painted surface part 37 for a vertical wall part to which spreadable painting is applied is provided to the part becoming the vertical wall part thereof. A painted surface part 38 for a background part is provided around both parts 35, 37. When a resin is injected in such a state that the transfer film 31 is inserted in the gap between a core mold and a cavity mold, the transfer film 31 is bent to the plane part and the vertical wall part along the protruding parts of the molds. At this time, larger elongation is required in the part becoming the vertical wall part as compared with the part becoming the plane part but, since the painted surface part 37 relatively large in elongation is provided, the height H of patterns can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer film for transferring a three-dimensional pattern portion on the back surface side of a resin part.

[0002]

2. Description of the Related Art Conventionally, as a thing having a three-dimensional pattern portion on the back surface side of a resin component, there is an emblem mounted on a vehicle, for example. As this general manufacturing method, for example, the following method shown in FIGS. 4 and 5 is adopted.

That is, the emblem 1 of this example is "A
The pattern portion 2 composed of the letters "RX" is three-dimensionally formed, and is manufactured in the following steps. First, the step (a) of FIG.
Then, the transparent resin body 3 is molded by injection molding of acrylic resin. On the back surface of the resin body 3, a concave portion is formed in a portion corresponding to the pattern portion 2. Next, in step (b), metal vapor deposition is performed over the entire back surface of the resin component 3. Then, in step (c), a coating is applied to the metal vapor deposition surface portion (the metal vapor deposition surface portion 4 corresponding to the design portion 2) to be left, and the step (d)
Then, it is put in caustic soda and unnecessary metal vapor deposition surface portions other than the pattern portion 2 are peeled off. Then, in step (e), the entire surface of which the color is different from that of the design portion 2 is applied from the back surface to form the coating surface portion 5 which is the background of the design portion 2.

The emblem 1 molded in this way
As shown in the sectional view of FIG. 5, the pattern portion 2 is three-dimensionally formed by the metal vapor deposition surface portion 4 from the plane portion 6 and the vertical wall portion 7.

However, since such a method has many processing steps after the injection molding step and relies on a large number of people,
Manufacturing is troublesome and leads to high costs.

On the other hand, as a method that is relatively easy to manufacture, there is a film transfer method using the transfer film 9.

As shown in FIG. 6, the transfer film 9 has a metal-deposited surface portion 11 serving as a design portion 14 on a flexible resin-made base film 10 and a coating surface portion 12 serving as a background portion at other portions. It is provided.

Then, as shown in step (a) of FIG.
The transfer film 9 is movably inserted between the core mold 15 and the cavity mold 16 by the film feeding device 17. Next, as shown in step (b), the transfer film 9 is positioned and clamped, and resin is injected from the nozzle 18 into the mold. The resin pressure at this time causes the metal vapor deposition surface portion 11 of the transfer film 9 to be bent along the convex portion 16 a of the cavity mold 16. After the transfer in this manner, the mold is opened in step (c) and the product (emblem 19) as shown in FIG. 7 is taken out.

In this emblem 19, a pattern portion 14 represented by a metal vapor deposition surface portion 11 is formed on the back surface side of a resin body 20, and in this pattern portion 14, the metal vapor deposition surface portion 11 has a flat surface portion 21 and a vertical wall portion 22. It is bent and formed three-dimensionally.

[0010]

However, in the conventional transfer film 9 used in the film transfer method, the metal vapor deposition surface portion 4 is bent by the resin injection pressure so that the flat surface portion 6 and the vertical wall portion 7 are separated from each other. Since the entire pattern portion 2 is formed, the portion corresponding to the vertical wall portion 22 of the metal vapor deposition surface portion 4 is particularly pulled during this bending, so that the metal vapor deposition surface portion 11 having almost no ductility is There is a risk of breakage at the wall portion 22. Therefore, the height H of the pattern portion 14 cannot be increased so much that the stereoscopic effect cannot be increased so much.

Therefore, an object of the present invention is to provide a transfer film capable of easily manufacturing a resin part having a pattern portion and molding a pattern portion having a large three-dimensional effect.

[0012]

The present invention has been made in view of the above-mentioned problems, and is inserted between a cavity mold and a core mold, and a resin is injected into the mold, whereby A base film having flexibility in a transfer film that is transferred to the back side of a resin component in a state in which a pattern part is bent along the convex part of the three-dimensionally formed from a flat part and a vertical wall part. , In the part that will be the flat part of the design part,
Provide a metal vapor deposition surface portion for metal-deposited flat surface, and provide a vertical wall coating surface portion on the portion that will be the vertical wall portion of the pattern portion, which has a spreadable coating with substantially the same color as the plane metal deposition surface portion. It is characterized by being a transfer film.

[0013]

[Operation] To mold a resin part using the transfer film having such a structure, the transfer film is inserted between the core mold and the cavity mold, and the mold is clamped, and then the resin is injected into the mold. Due to the resin pressure at this time, the flat metal deposition surface portion and the vertical wall coating surface portion are bent along the convex portion in the mold. In this case, the portion corresponding to the vertical wall portion is required to have larger elongation than the portion corresponding to the flat surface portion of the design portion, but in this portion, the vertical wall coating surface portion having relatively large elongation is provided. Therefore, it does not break like in the past and follows the shape of the convex portion.

Since the resin part molded in this manner is unlikely to break at the vertical wall portion unlike the conventional one, the height of the pattern portion can be increased, and the three-dimensional effect can be made larger than before.

Further, a flat metal vapor deposition surface portion is provided on the flat surface portion that has a great influence on the appearance of the design portion, and a vertical wall coating surface portion of the same color as the flat surface metal vapor deposition surface portion is provided on the vertical wall portion having a small influence. In addition, since the flat surface and the vertical wall have a certain angle, the reflection directions are different, so there is no problem in appearance due to the difference in material between the flat metal deposition surface and the vertical wall coating surface. It never happens.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention. The same or equivalent members as the conventional ones are designated by the same reference numerals, and the structure will be described first.
Reference numeral 31 is a transfer film, and this transfer film 31
Has a flexible resin base film 32, and the flat surface portion 3 of the design portion 33 of the base film 32.
In the portion to be 4, the metal vapor deposition surface part 3 for the metal vapor-deposited plane
5 is provided, in the portion which becomes the vertical wall portion 36 of the pattern portion 33,
A vertical wall coating surface portion 37 is provided which is spread-painted in substantially the same color as the flat metal vapor deposition surface portion 35, and a background which is different in color from the vertical wall coating surface portion 37 and which is a background is provided around this. And a background coating surface portion 38 is provided.

Next, a method of forming the emblem 39 using the transfer film 31 will be described.

The molding sequence is similar to that shown in FIG.
The transfer film 31 is clamped from the position shown in FIG. 8A to the position shown in FIG. 8B,
Then, the resin is injected from the nozzle 18 into the mold.

By the resin pressure at this time, the flat metal deposition surface portion 35 and the vertical wall coating surface portion 37 are bent along the convex portion 16a of the cavity mold 16. In this case, the portion corresponding to the vertical wall portion 36 is required to have larger elongation than the portion corresponding to the flat surface portion 34 of the pattern portion 33. Since the surface portion 37 is provided, the surface portion 37 is not broken unlike the conventional case, and follows the shape of the convex portion 16a.

Therefore, since the vertical wall portion 36 is unlikely to break in the conventional case, the height H of the pattern portion 33 can be increased, and the three-dimensional effect of the pattern portion 33 of the emblem 39 can be made larger than before. See FIG. 2).

Further, a plane metal vapor deposition surface portion 35 is provided on the plane portion 34 which greatly affects the appearance of the pattern portion 33, and a plane metal vapor deposition surface portion 3 is provided on the vertical wall portion 36 having a small influence.
5, a vertical wall coating surface portion 37 of the same color is provided, and since the flat surface portion 34 and the vertical wall portion 36 have an angle of approximately 90 °, since the reflection directions are different, the flat surface metal deposition surface portion 35 There is no problem in appearance due to the difference in material between the coating surface portion 37 for the vertical wall and the coating surface portion 37 for the vertical wall.

FIG. 3 shows a second embodiment of the present invention.

In the transfer film 41 of this embodiment, a vertical wall coating surface portion 37 and a background coating surface portion 38 are provided on the upper surface side of a transparent resin base film 32 having the same flexibility as in the first embodiment. At the same time, the metal deposition surface portion 42 is provided on the entire lower surface of the base film 32.

The vertical wall coating surface portion 3 of the metal vapor deposition surface portion 42
A portion visible from between 7 is a flat metal vapor deposition surface portion 42a forming the flat portion 34 of the pattern portion 33.

The transfer film 41 is used for the first
The emblem 39 is formed by the same film transfer method as in the embodiment.

According to this embodiment, since the metal vapor deposition surface portion 42 is provided over the entire back surface of the base film 32, it is easier to manufacture as compared with the partial vapor deposition as in the first embodiment.

Further, since the metal vapor deposition surface portion 42 is provided on the entire surface, there is a possibility that breakage may occur at the portion of the vertical wall portion 36 at the time of injection, but this portion is on the back side of the vertical wall coating surface portion 37. Since it is hidden and cannot be seen from the surface, there is no effect on the appearance.

[0029]

As described above, according to the present invention, since the portion of the painted surface portion for the vertical wall extends at the time of injection, even if the height of the pattern portion is increased, it does not break as in the conventional case. , The three-dimensional effect can be improved. In addition, this painted surface for the vertical wall is designed to be located in a portion corresponding to the inconspicuous vertical wall, and since the same color as the metal vapor deposition surface for the flat surface is used, Compared with the conventional one provided with a metal vapor deposition surface portion, it has a practically useful effect of not lowering the appearance quality.

[Brief description of drawings]

FIG. 1 is a sectional view of a transfer film showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing an emblem showing the first embodiment.

FIG. 3 is a sectional view of a transfer film showing a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of an emblem manufacturing process showing a conventional example.

5 is a sectional view taken along the line AA of FIG. 4 showing a conventional example.

FIG. 6 is a cross-sectional view of a transfer film showing another conventional example.

FIG. 7 is a sectional view corresponding to FIG. 5 showing another conventional example.

FIG. 8 is a cross-sectional view showing a film transfer method.

[Explanation of symbols] 15 Core type 16 Cavity type 16a Convex portion 31,41 Transfer film 32 Base film 33 Design portion 34 Flat surface portion 35,42a Flat metal deposition surface portion 36 Vertical wall portion 37 Vertical wall coating surface portion 39 Emblem (resin parts)

Claims (1)

[Claims] 1. A pattern part is bent along a convex part in the mold by being inserted between a cavity mold and a core mold, and a resin is injected into the mold to form a flat surface part and a vertical wall. In the transfer film that is transferred to the back side of the resin component in a state where it is three-dimensionally formed from the parts, a metal-deposited flat surface is formed on a portion of the flexible base film that is the flat portion of the pattern A transfer film, characterized in that a metal vapor deposition surface portion is provided, and a vertical wall coating surface portion, which is spread-painted in substantially the same color as the flat metal vapor deposition surface portion, is provided at a portion which becomes the vertical wall portion of the pattern portion. .