JPH092439A - Hot stamping method and device thereof - Google Patents

Abstract

PURPOSE: To obtain sharp prints at both sides in hot stamping and improve peeling resistance. CONSTITUTION: In a method for pressing under heat a transfer letterpress 5 to the curved surface 1a of a bottle 1 via transfer tape 3, thereby hot-stamping the aluminum foil 4 of the transfer tape 3 to the surface 1a, the separate central part 5b of the transfer letterpress 5 is pressed under heat to the surface 1a of the bottle 1 via the transfer tape 3, and then both sides 5a of the transfer letterpress 5 are pressed under heat to the surface 1a via the transfer tape 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot stamping method and apparatus for hot stamping (also called foil stamping, or simply stamping) a curved surface of a plastic container or the like.

[0002]

2. Description of the Related Art A conventional hot stamping device is shown in FIG.
As shown in FIG. 3, a transfer tape 3 is horizontally stretched above the bottle 1, and a metal transfer relief plate 5 is arranged above the transfer tape 3 so as to be able to move up and down.

The bottle 1 is made of a synthetic resin container having a curved surface 1a, is set on the holder 2 in a horizontal state, and is filled with air so as not to be recessed during hot stamping. The bottle 1 has a small hot stamping and its area is small, and is generally hot stamped near the flat center surface of the surface 1a, but in recent years, a wide hot stamping area including a curved surface is required. There are many cases. Further, the transfer tape 3 is made of a thin film such as polyester or cellophane, and a peelable aluminum foil (foil) 4 coated with an adhesive is vacuum-deposited on the transfer surface facing the bottle 1. The reel is sequentially wound on a take-up reel via a plurality of guide rollers. Further, the transfer relief plate 5 has its surface facing the bottle 1 and the transfer tape 3 curved corresponding to the surface 1a of the bottle 1, and a plurality of projections 5c are formed on the surface at predetermined intervals. Predetermined characters, patterns, etc. are appropriately formed on the surfaces of the plurality of convex portions 5c which are projected and are attached to the tip end portion of the piston 6 in the inverted air cylinder.

In the hot stamping device thus constructed, when the air cylinder is driven for hot stamping, as shown in FIGS. 5 (a), 5 (b) and 5 (c), the surface of the bottle 1 is transferred to the surface 1a. The relief plate 5 was pressed and heated for a short time via the transfer tape 3, and the aluminum foil 4 of the transfer tape 3 was peeled off and adhered to the surface 1a of the bottle 1 to correspond to the protrusion 5c of the transfer relief plate 5. Metal foil letters, patterns, etc. are stamped on the surface 1a of the bottle 1.

[0005]

The conventional hot stamping device is constructed as an up-down type as described above, and the central portion and both side portions of the transfer relief plate 5 are uniformly pressed on the curved surface 1a of the bottle 1. Since it is only heated, when hot stamping of the bottle 1 or the area thereof covers a wide range including a curved surface other than the central surface, the portions on both sides of the transfer tape 3 are bent and displaced in a bow shape (FIG. 5).
(See (b) and (c)). As a result, there is a problem in that the aluminum foil 4 is squeezed out on both sides of the hot stamping (see the shaded portions of the characters on both sides of FIG. 6) and the printing becomes very unclear. Further, when hot stamping or the area thereof covers a wide range including a curved surface, there is a problem that the transfer strength of the aluminum foil 4, in other words, the peel strength is weakened and the commercial value is lowered.

The present invention has been made in view of the above problems, and makes printing on both sides of hot stamping clearer.
It is an object of the present invention to provide a hot stamping method and an apparatus therefor capable of improving peel strength.

[0007]

In the present invention, in order to achieve the above object, a transfer body is pressed against the surface of a packaging container having a curved surface portion via a transfer tape, and the transfer portion of the transfer tape is placed on the surface. In the printing method, the central portion of the transfer body is pressed against the surface, and then the side portion of the transfer body is pressed against. In the present invention,
In order to achieve the above object, a transfer body is pressed against a surface of a packaging container having a curved surface portion via a transfer tape, and a transfer portion of the transfer tape is printed on the surface, the transfer body is at least the curved surface portion. It is divided into a side portion and a central portion for use, and the central portion is projected and held so as to be movable back and forth in the pressing direction against the side portion.

[0008]

According to the present invention having the above-mentioned structure, the central portion of the transfer member is first pressed against the surface of the packaging container via the transfer tape, and then the curved surface portion of the packaging container. It is pressed against the transfer tape with its side bent. Thus, when the central portion and the side portions of the transfer body are pressed against the surface of the packaging container including the curved surface portion via the transfer tape, the transfer portion of the transfer tape is printed on the surface of the packaging container, and the surface of the packaging container is Is hot stamped.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the hot stamping method and apparatus for hot stamping according to this embodiment are made of a metal transfer relief plate 5.
Is divided into two parts, and the hot stamping timings of the left and right side parts 5a and the central part 5b are shifted.

The transfer relief plate 5 is concavely curved so that its surface facing the bottle 1 and the transfer tape 3 corresponds to the surface 1a of the bottle 1, and a plurality of projections 5c are formed on the surface at predetermined intervals. Predetermined characters and patterns are appropriately formed on the surfaces of the plurality of convex portions 5c, and they are attached to the tip portion of the piston 6 in the inverted air cylinder. This transfer letterpress 5
Is different from the conventional example in that the left and right side portions 5a and the central portion 5b are
Is divided into two parts, and a central portion 5b is provided between the left and right side portions 5a, and a guide rail 5d and a guide stopper 5 are provided.
The center portion 5b is protruded in the pressurizing / heating direction (downward in FIG. 1) by the elastic force of the coil springs 5f so that the central portion 5b can be moved up and down via e. It has a function of hot stamping before the both side portions 5a. The other parts are the same as the description of the conventional example, and therefore omitted.

Next, the operation will be described. When the air cylinder is driven to perform hot stamping on the surface 1a of the bottle 1, as shown in FIGS. 2 (a), 2 (b) and 2 (c), the protruding central portion 5b of the transfer relief plate 5 is formed on the surface 1a of the bottle 1. It is first pressurized and heated via the transfer tape 3.
Next, as the right and left side portions 5a of the transfer relief plate 5 are lowered, the central portion 5b relatively retracts (raises) between the left and right side portions 5a while compressing and compressing the plurality of coil springs 5f, and the surface of the bottle 1 The left and right side portions 5a are pressed and heated by the transfer tape 3 which is bent to the side 1a (see FIG. 2 (d)). In this way, the left and right side portions 5 of the transfer relief plate 5 are attached to the surface 1a of the bottle 1.
When a and the central portion 5b are pressed and heated through the transfer tape 3 for a short time, the transfer tape 3 is applied to the surface 1a of the bottle 1.
The aluminum foil 4 is peeled off and adhered, and metal foil letters and patterns corresponding to the convex portions 5c of the transfer relief plate 5 are attached to the bottle 1
Is clearly patterned on the surface 1a.

Thus, the hot stamping is completed,
When the transfer relief plate 5 rises, the central portion 5b of the transfer relief plate 5 becomes
Due to the elastic force urging action of the plurality of compressed coil springs 5f, the coil springs 5f relatively advance (fall) to project below the left and right side portions 5a, and stand by for the next hot stamping.

According to the above configuration, the protruding central portion 5b of the transfer relief plate 5 is hot stamped first, and then the left and right side portions 5a are hot stamped on the curved surface 1a of the bottle 1, so that the hot stamping of the bottle 1 is performed. Even when the area is wide, including a curved surface, the parts on both sides of the transfer tape 3 are hardly displaced. As a result, no protrusion of the aluminum foil 4 occurs on both sides of the hot stamping, and the hot stamp can be remarkably sharpened. Furthermore, the transfer strength of the aluminum foil 4, that is, the peeling strength can be significantly improved, and the product value can be expected to be significantly improved.

Next, FIG. 3 shows another embodiment of the present invention. In this case, the flat concave surface 1a of the bottle 1 is shown.
Sliding central portion 5 of transfer relief plate 5 to correspond to
b has a flat convex shape. The other parts are the same as those described in the above embodiment, and therefore will not be described.

Next, the operation will be described. When the air cylinder is driven to perform hot stamping on the surface 1 a of the bottle 1, the protruding central portion 5 b of the transfer relief plate 5 is first pressed and heated via the transfer tape 3 on the flat surface 1 a of the bottle 1. Next, as the left and right side portions 5a of the transfer relief plate 5 are lowered, the central portion 5b relatively retracts (rises) between the left and right side portions 5a while compressing and compressing the plurality of coil springs 5f.
Then, the curved surface 1a of the bottle 1 is pressurized and heated via the transfer tape 3 whose left and right sides 5a are bent. In this manner, when the left and right side portions 5a and the central portion 5b of the transfer relief plate 5 are pressed and heated for a short time on the surface 1a of the bottle 1 via the transfer tape 3, the transfer tape 3 is attached to the surface 1a of the bottle 1. The aluminum foil 4 is peeled off and adhered, and metal foil letters and patterns corresponding to the convex portions 5c of the transfer relief plate 5 are clearly patterned on the surface 1a of the bottle 1.

In this embodiment as well, the same effect as that of the above embodiment can be expected, and since the left and right side portions 5a are pressed and heated to the left and right side portions of the curved surface 1a later, the bottle 1 is hot. Even when the stamping or the area thereof covers a wide range including the curved surface, the parts on both sides of the transfer tape 3 are hardly displaced. Therefore, no protrusion of the aluminum foil 4 occurs on both sides of the hot stamping, and the hot stamp can be remarkably sharpened. Furthermore, the transfer strength of the aluminum foil 4, that is, the peeling strength can be significantly improved, and the product value can be expected to be significantly improved.

In the above embodiment, the convex portion 5c is formed with predetermined characters and patterns, but if necessary,
It may be a color, a symbol, or a figure. Needless to say, the air cylinder may be in an upright state, a horizontal state, or an inclined state. Further, instead of the air cylinder, another actuator such as a hydraulic cylinder may be used as appropriate. Further, the transfer relief plate 5 may be appropriately divided into a number such as 3 to 5 if the hot stamping timings of the central portion 5b and other portions can be shifted. Needless to say, the number of coil springs 5f may be increased or decreased, or another elastic body may be used as appropriate instead of the coil springs 5f. In addition to the bottle 1, a glass container, tube, bottle, or the like may be appropriately used as long as it is a packaging body having a curved surface. Furthermore, if hot stamping is required, hot stamping of a coloring material or the like may be appropriately used in addition to the aluminum foil 4. Further, even if the bottle 1, the transfer tape 3, and the transfer relief plate 5 are set not only in the vertical direction but also in the horizontal direction in the horizontal direction, the same effect as the above embodiment can be obtained.

[0018]

As described above, according to the present invention as set forth in claim 1 or 2, there is provided a hot stamping method and apparatus capable of sharpening printing on both sides of hot stamping and improving peel strength. There is a special effect that you can.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a hot stamping method and its apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing an operation in one embodiment of the hot stamping method and apparatus of FIG.

FIG. 3 is an explanatory view showing another embodiment of the hot stamping method and apparatus according to the present invention.

FIG. 4 is an explanatory diagram showing a conventional hot stamping method and apparatus.

5 is an explanatory diagram showing an operation of the hot stamping method and apparatus of FIG.

FIG. 6 is an explanatory view showing a bottle hot stamped by a conventional method.

[Explanation of symbols]

 1 ... Bottle (packing container) 3 ... Transfer tape 4 ... Aluminum foil (transfer part) 5 ... Transfer letterpress (transfer body) 5a ... Left and right side parts (side part) 5b ... Center part

Claims (2)

[Claims] 1. A hot stamping method in which a transfer body is pressed against the surface of a packaging container having a curved surface via a transfer tape, and the transfer portion of the transfer tape is printed on the surface, the center of the transfer body being on the surface. The hot stamping method is characterized in that the side portions of the transfer body are pressed against each other. 2. A hot stamping device for pressing a transfer body onto a surface of a packaging container having a curved surface portion via a transfer tape to print the transferred portion of the transfer tape on the surface, at least the transfer body being the curved surface portion. A hot stamping device, characterized in that it is divided into a side part and a central part, and the central part is projected and held so as to be able to move forward and backward in the pressing direction against the side part.