JPH0312507Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a water tank for transfer in curved surface printing using a swellable film.

Prior Art This type of curved surface printing method, as shown in Japanese Patent Publication No. 52-41682, involves floating a swellable transfer film on which a transfer pattern is printed on the surface of water, and expanding and expanding the swellable transfer film to print on the transfer pattern. The transfer film is swollen and pressed onto the surface of the print material by water pressure, and the transfer pattern is transferred onto the surface of the print material.

Problems to be Solved by the Invention The important thing in this kind of curved surface printing method is that the transfer film can be spread on the water surface without wrinkles or distortion.

However, since the transfer film has swelling properties and is usually made of a water-soluble material such as polyvinyl alcohol, the frictional resistance generated between the transfer film and the water surface is large, and therefore, when it starts to swell on the water surface, , a difference in expansion speed occurs between the central portion and the side portions of the transfer film, which often causes wrinkles in the transfer film.

For this reason, conventionally, as shown in Figure 6,
A large fan 62 is provided on the film receiving side of the water tank 61, and this applies wind pressure to the center of the transfer film 63 in a spot shape, and this wind pressure stretches the transfer film when it starts to swell. The transfer film 63 is conveyed by the generated standing waves, thereby removing distortion of the transfer film.

However, with such conventional means, it is extremely difficult to eliminate waves generated on the water surface by wind pressure up to the transfer position 64, so striped waves and pins may appear on the transfer pattern transferred to the printing substrate. There was a problem with holes occurring.

Means for Solving the Problems In the water tank of the present invention, a water spouting part and a water spouting part are provided below the transfer film at the swelling position of the transfer film in the water tank, and water flows from the water spouting part toward the water spouting part. This is intended to expand the swollen transfer film, and since the water flow flowing from the water spouting part to the water absorption part has a large frictional resistance between the transfer film and water, it is difficult to effectively pull and expand the transfer film. I can do it.

Function The water flow flowing from the water spouting section to the water absorption section expands the transfer film while stretching out wrinkles that occur in the transfer film as the transfer film swells.

That is, this water stream flows while pulling the transfer film due to frictional resistance, so that the swelling and expansion of the transfer film is promoted.

Embodiment In FIGS. 1 and 2, 10 is the aquarium main body 20
Reference numeral 30 indicates a film expanding device, and 30 indicates a printing material supplying means, and the transfer film 40 is supplied to the water tank body 10 by an example of a supplying means (not shown) by a delivery roller mechanism.

This transfer film 40 is made in a long series, and a large number of transfer patterns 41 are sequentially printed and formed in series.

The aquarium main body 10 is made in a rectangular shape and 1
The transfer film 40 is made to come into contact with water at the end thereof as a film receiving end 11, and to start swelling due to the water contact zone 12.

A gentle conveying water flow flows through the water tank body 10 from the receiving end 11 side toward the other end, and the transfer film 40 is conveyed by this conveying water flow.

The film expansion device 20 includes the aquarium main body 1
It is provided in the water contact zone 12 of No. 0, and includes a water spouting part 21 arranged below the water surface in the center of the water tank near the receiving end 11, and a water suction part 22 arranged in the water spouting direction of this water spouting part 21, and It has water discharging and suction means, for example, a pipe system 23 that connects the water discharging part and the water suction part, and a pump 24 provided in this pipe system.

The water spouting section 21 is made to spout water along the swelling direction of the transfer film 40. Therefore, the water spouting direction is determined by the relative position with respect to the transfer film 40, but normally it is shown in FIG. Since it is provided near the swelling start line l of the transfer film 40, the direction of water spouting is also determined along the transfer film transport direction a.

The water suction portion 22 is provided to absorb water discharged from the water spouting portion 21, so that a partially expanded water flow is generated from the water spouting portion 21 toward the water suction portion 22.

In the figure, reference numeral 50 denotes a blower provided as desired, which is used to apply wind pressure to the transfer film 40 as in the conventional case.

Since the water tank of the present invention is like this, the transfer film 40 which has started swelling in the water contact zone 12
As shown in FIG. 3, the film is rapidly expanded by riding on the film expansion water flow F (hereinafter referred to as expansion water flow) discharged from the water spouting part 21, and at the end of swelling, the expansion water flow F disappears by the water absorption part 22. From then on, it is transported quietly by the transport water flow.

The printing material 31 supplied by the printing material supply means 30 comes into contact with the transfer film 40 transported by the transporting water flow from above from above, and the printing material 31 is immersed in water to perform the transfer.
The remaining film after transfer dissolves in the water tank and disappears, similar to conventional curved surface printing.

In the above, the water discharging part 21 and the water suction part 2
2 is determined in relation to the swelling start position of the transfer film 40. For example, as shown in FIG.
If the transfer position is more biased toward the transfer position, the water spouting direction may be set in the radial direction, but in this case as well, the position of the water absorption part 22 is set so that the expanded water flow F does not substantially disturb the conveying water flow. It is necessary to do so.

For this reason, in FIG. 4, the water absorbing portion 22
are arranged on both sides of the water tank body 10, and the water absorption parts 22 are positioned in front of the water discharge part 21 so that the expanded water flow F does not interfere with the conveyed water flow. In the above embodiment, the water absorption part 22 is lengthened to absorb the expanded water flow F on both sides of the aquarium main body.
As shown in Fig. 5, the water suction part 22 may be made in an arc shape and the water discharge part 21 may be positioned at the center point of this arc.In this way, the flow velocity and force of the expanded water flow F can be approximately the same. You can do it.

Effect of the invention The water tank of this invention has a transfer film 40 that swells like this.
Since it is expanded by the expansion water flow F, it has the effect of effectively eliminating wrinkles and distortions that occur during swelling.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of the proposed aquarium, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged side view of the main parts, and Figs. 4 and 5 are the film expansion device used in the proposed aquarium. FIG. 6 is a plan view of a conventional aquarium. In the figure, 10 is a water tank main body, 20 is a film expansion device, 21 is a water discharge part, 22 is a water absorption part, and 40 is a transfer film.

Claims (1)

[Scope of utility model registration request] A film expansion device for expanding the transfer film at the start of swelling is provided in the aquarium main body, one end of which is a swellable transfer film receiving end. The transfer film includes a water spouting section disposed below and a water suction section disposed below the water surface to suck water spouted from the water spouting section, and the transfer film is disposed between the water spouting section and the water suction section. A curved printing transfer tank configured to form an expanding water flow that helps expand the swelling.