JPH0775920B2 - Transfer film - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transfer film, and more specifically, it is possible to suitably laminate a pattern on the surface of a work whose surface is formed into a three-dimensional curved surface. Transfer film.

BACKGROUND OF THE INVENTION Recently, transfer films for transferring patterns such as characters and figures to a work as a molded product have been widely used. Due to the development of printing technology, the main reason for its adoption is that the cost can be reduced and the finish can be made more beautiful compared to painting methods such as painting. In particular, recently, a painting method using a transfer film has been carried out even for a work having a three-dimensional curved surface shape having an uneven portion on the painting surface.

As a conventional technique of this kind of painting method, Japanese Patent Laid-Open No. 56-1238
The technical idea disclosed in Japanese Patent No. 91 can be cited. As shown in FIG. 1a, this technical idea is such that an ink layer 6 as a pattern is provided on a thermoformable film-shaped substrate sheet 2 through a transparent release primer layer 4, and the ink layer A heat-sensitive adhesive layer 8 is provided on the entire surface of 6. Then, the transfer film 10 configured in this way
Are usually transferred to the surface of the work to be painted by a vacuum transfer method.

That is, the work is completely accommodated in the lower box of a vacuum box (not shown), and the transfer film 10 with the adhesive layer 8 facing the painted surface side of the work is sandwiched between the upper box and the lower box, Stabilize the transfer film 10 by making the box of the vacuum state, after that, after opening the upper box to the atmosphere and pasting the transfer film 10 on the painting surface of the work by the difference in air pressure, the base sheet 2 is peeled off and the work is painted.

By the way, it is technically difficult and costly for the vacuum transfer apparatus adopted in such a vacuum transfer method to completely vacuum the inside of the vacuum box. further,
Even if the temporary state and the vacuum state are realized, there is a problem that it takes a long time to reach the vacuum state. Therefore, the vacuum degree is usually transferred at about 10 Torr.

However, as shown in Fig. 1b, the painting surface of the work 12
When the concave portion 16 exists in the portion 14, the vacuum level is not so high when the vacuum is drawn, so that the painting surface 14 and the adhesive layer 8
The air cannot escape from the contact surface 20 with the end portion of the work 12 and the gap 18 remains in the concave portion 16, and the ink layer 6 is sufficiently attached to the painting surface 14 of the work 12. There is the inconvenience of not being worn. In this case, as shown in FIG. 1C, the ink layer 6 after the base material sheet 2 is peeled off does not completely adhere to the concave portion 16 of the painting surface 14 of the work 12, and the work 12 is painted. However, there is a drawback that the film cannot be sufficiently processed and the transferred film is easily peeled off.

To improve this, for example, a hole (not shown) is provided in a portion other than a portion to be painted (a portion other than where the ink layer 6 exists) in the concave portion 16 of the work 12, and air remaining from the hole is provided. However, if the workpiece 12 is a fuel tank for automobiles or motorcycles, it is practically impossible to provide a hole. Cannot be overcome.

[Object of the Invention] The present invention has been made in order to overcome the above-mentioned inconveniences, and includes a coating layer of a film from a portion where ink as a pattern is present to a portion corresponding to an end portion of a work in a transfer film. A work in which a concave portion is formed on the painting surface by leaving the adhesive layer uncoated or by providing the film coating layer and the adhesive layer only on the portion of the transfer film where the ink as a pattern exists. Even in such a case, an object thereof is to provide a transfer film capable of laminating a pattern on the painting surface with good adhesiveness.

[Means for Achieving the Purpose] In order to achieve the above-mentioned object, the present invention is to laminate an ink layer as a pattern on a film-shaped substrate sheet through a coating layer and to form an image on the ink layer. In a transfer film in which an adhesive layer is laminated and the ink layer is attached to a work through the adhesive layer, the base sheet has a coating layer and an adhesive layer laminated only on an ink layer as a pattern. A portion and a portion extending from the ink layer portion to the edge portion of the base sheet, where the coating layer, the ink layer and the adhesive layer are not laminated, and the base sheet relative to the work. Air that exists between the base material sheet and the painting surface of the workpiece when the adhesive layer surface and the painting surface of the workpiece, which are arranged to face each other at a predetermined distance apart from each other, come into contact with each other. The coating layer, ink layer and Adhesive layer is characterized in that an air vent through the portion not laminated.

[Embodiment] Preferred embodiments of the transfer film according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 2, reference numeral 30 indicates a vacuum transfer device for transferring the transfer film according to the present invention onto the surface of a work, and the vacuum transfer device 30 includes a base 32. A plate 34 is arranged on the upper part of the base 32, and a vacuum box 36 and a lower box 38 are mounted on the upper surface of the plate 34. A mounting frame for mounting a transfer film, which will be described later, on the upper outer peripheral portion of the lower box 38.
39 is fixed.

A cylinder 40 is fixedly mounted on the lower surface of the plate body 34, and a piston rod 42 constituting the cylinder 40 is attached to a central portion of a support body 44. In the corners of the support 44, rods 46, 47,
48 and 49 are erected, and the rods 46 to 49 are the plates 3
4, penetrates the bottom of the lower box 38 and enters the lower box 38. At the upper ends of the rods 46 to 49, a work mounting table 52 having a recess 50 in the substantially central portion of the upper surface thereof is fixedly provided.

Guide rails 54, 56 and guide rails 58, 60 are erected at the corners of the base 32, and the guide rails 54, 56, 58, 60 move vertically along the longitudinal direction. The body 62 is interposed and the guide rails 54, 56,
The upper ends of 58 and 60 are attached to the support plate 64, respectively. A cylinder 66 is attached to a central lower surface of the support plate 64, and a piston rod 68 of the cylinder 66 penetrates the moving body 62 and moves integrally with the moving body 62 in the vacuum box 36, Upper box
It is fixed to the upper surface of 70. In the opening 72 of the upper box 70, a flat heater 74 is installed substantially horizontally.

The opening 72 of the upper box 70 and the opening 76 of the lower box 38 communicate with a vacuum generation source 83 through passages 80 and 82, respectively.
That is, the opening 72 of the upper box 70 includes the passage 80, the pipe 84, and the three-way valve.
Communicating with the first vacuum pump 90 via 86 and line 88,
On the other hand, the opening 76 of the lower box 38 communicates with the passage 82 and the pipe 92, and the pipe 92 is branched so that one pipe 94 communicates with the second vacuum pump 96 and the other pipe 94. 98 side is the three-way valve 86
Is in communication with.

On the other hand, the transfer films 100a and 100b according to the present invention are shown in FIG.
Alternatively, it is configured as b. That is, in the transfer film 100a shown in FIG. 3a, the ink layer 106 is formed on the film-shaped base sheet 102 made of vinyl chloride or the like via the coating layer 104, and is adhered so as to cover only the ink layer 106. The agent layer 108 is formed.

Further, in the transfer film 100b shown in FIG. 3B, the covering layer 104 extends from the portion 107 where the ink layer 106 is present on the base sheet 102 to the portion corresponding to the end of the work (not shown).
Further, a portion 109 where the adhesive layer 108 is left unpainted (hereinafter, referred to as an unpainted portion), that is, a portion including only the base sheet 102 as an air vent passage described later is formed.

The transfer films 100a and 100b thus constructed have at least an ink layer so that they can be easily understood in comparison with the structure of the transfer film 10 according to the prior art shown in FIG. 1a.
It is characterized in that the coating layer 104 and the adhesive layer 108 are not formed in the vicinity of both side portions of the 106.

The transfer film according to the present invention and the vacuum transfer device for transferring the transfer film to a work are basically constructed as described above. Next, the operation and effect thereof will be described.

First, a workpiece 114 (see FIG. 4), which is a molded product having a recess 112 formed in its painting surface 110, is attached on the workpiece mounting table 52 of the vacuum transfer device 30 shown in FIG. In the transfer film 100a, the side of the adhesive layer 108 side is the work 114
After being placed on the film placement frame 39 so as to face the painting surface 110 side, the upper cylinder 66 is urged to press the upper box 70 under the action of the piston rod 68, thereby moving the moving body. 62
Moves vertically downward along the guide rails 54, 56, 58 and 60, and the transfer film 100a is fixed between the upper box 70 and the lower box 38 (see FIG. 4).

Then, the first port 118a of the valve body 116 of the three-way valve 86 is connected to the pipe 88.
The second port 118b and the third port 118c are communicated with the conduits 84 and 98, respectively. In this state, the first vacuum pump 90 and the second vacuum pump 96
Is operated to evacuate the inside of the vacuum box 36 to transfer the film.
Stabilize 100a horizontally.

Next, the lower cylinder 40 is urged to drive the piston rod 42, and the work support table 44 and rods 46 to 49 are used to move the work table.
52 is moved to the transfer film 100a side and brought into contact with the painting surface 110 of the work 114 and the adhesive layer 108 side of the transfer film 100a.

In this state, as shown in FIG. 5, when the second port 118b formed in the valve body 116 of the three-way valve 86 is communicated with the atmosphere, the inside of the upper box 70 is suddenly depressurized, which causes the transfer film. The adhesive layer 108 side of 100a is the painting surface 110 of the work 114.
So that it covers the entire surface of. In this case, if the second vacuum pump 96 continues vacuuming,
As shown in FIG. C, the air existing between the base sheet 102 and the painting surface 110 of the work 114 passes between the unpainted portion 109 consisting only of the base sheet 102 as an air vent passage and the painting surface 110 of the work 114. Pulled in the direction of the arrow, the end 111 of the work 114
(See FIG. 5) to the opening 72 in the lower box 38,
2. It is sucked by the second vacuum pump 96 via the pipe lines 92 and 94. Therefore, provisionally, the concave portion 11 is formed on the painting surface 110 of the work 114.
Even if 2 (see FIG. 3c and FIG. 5) exists, the base sheet 102 and the painting surface 110 of the work 114 closely contact with each other as shown in FIG. Therefore, the adhesive layer 108 and the coating layer 104 are also adhered to the painting surface 110 of the work 114 with a strong force. Then, the heater 74 is energized and the radiant heat of the heater 74 causes the adhesive layer 108 in the transfer film 100a to move to the work 1
It is firmly adhered to 14 painting surfaces 110.

After that, the vacuuming by the second vacuum pump 96 is stopped and the energization of the heater 74 is stopped, and the upper box 70 and the work mounting table 52 are returned to their original positions under the driving action of the cylinders 66 and 40. Work 11 to which the transfer film 100a is transferred
4 is taken out and the base material sheet 102 is peeled off from the coating layer 104 to form an ink layer 106 on the painting surface 110 of the work 114.
The pattern corresponding to is closely transferred (see FIG. 3d).

The above description of the operation is for the transfer film 100a, but the transfer film 100b (see FIG. 3b) is also different except that the air escapes from the unpainted portion 109 to the end 111 side of the work 114. It will be easily understood that the same effect is obtained.

Further, the heater 74 may be continuously energized during use of the vacuum transfer device 30.

[Effects of the Invention] As described above, according to the present invention, at least the transfer film has only the base material sheet on which the coating layer and the adhesive layer are not applied to the portion corresponding to the ink layer and the end portion of the work. Parts are provided. Therefore, even if a concave portion is formed on the painting surface of the work, air escapes through the unpainted portion between the painting surface of the work and the base material sheet, and the base material sheet is large without a gap on the painting surface of the work. Use force to bring it into close contact. Therefore, the adhesive layer, the ink layer and the coating layer are firmly adhered to the painting surface of the work. After all, according to the present invention, it is possible to obtain the effect that the ink layer of the work transferred by using the transfer film, that is, the pattern is not easily removed from the work.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment,
It goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is an explanatory view of a transfer film according to the prior art and a transfer action of the transfer film to a work, and FIG. 2 is a partial cross section of a general vacuum transfer device for transferring the transfer film according to the present invention to the work. Explanatory drawing, FIG. 3 is an explanatory view of a transfer film according to the present invention and a transfer action of the transfer film with respect to a work, and FIGS. 4 and 5 show a case where the transfer film according to the present invention is transferred by the vacuum transfer device. It is explanatory drawing explaining an effect. 30 ... Vacuum transfer device, 36 ... Vacuum box 74 ... Heater, 83 ... Vacuum source 90, 96 ... Vacuum pump 100a, 100b ... Transfer film 102 ... Substrate sheet, 114 ... Coating layer 106 …… Ink layer, 108 …… Adhesive layer 109 …… Unpainted part, 110 …… Painting surface 111 …… Edge part, 114 …… Work piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Maruta 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (56) Reference JP-A-63-64800 (JP, A) 62-164199 (JP, U)

Claims (1)

[Claims] 1. An ink layer as a pattern is laminated on a film-shaped substrate sheet via a coating layer, and an adhesive layer is laminated on the ink layer, and the ink layer is interposed via the adhesive layer. In the transfer film for adhering to a work, the base material sheet has a portion in which the coating layer and the adhesive layer are laminated only on the ink layer as a pattern, and extends from the ink layer portion to the edge portion of the base material sheet. The coating layer, the ink layer, and the adhesive layer are not laminated, the base sheet is relatively displaced with respect to the work, and the base sheet is disposed so as to be spaced a predetermined distance and face each other. When the adhesive layer surface and the painting surface of the workpiece come into contact with each other, air existing between the base sheet and the painting surface of the workpiece is passed through a portion where the coating layer, the ink layer and the adhesive layer are not laminated. To deflate Transfer film to be a butterfly.