JPS6025267B2 - Curved surface printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a curved surface printing device for printing on non-flat surfaces such as curved surfaces and irregularly shaped surfaces.

Curved surface printing devices usually include a liquid tank that stores a liquid, and a printing pattern support sheet, which has a pattern to be printed on the surface of a thin film that is soluble in the liquid, floats on the liquid surface in the liquid tank. It is equipped with a printing pattern support sheet feeding device for supplying the printed pattern support sheet. The present inventors have already developed a curved surface printing device in which the printing pattern support sheet is fed in a continuous form into a liquid tank, and the pattern is transferred while the sheet is kept running. . However, performing the transfer operation while running the printed pattern support sheet in a continuous state requires control by strictly correlating the speed of the printed pattern support sheet feeding device with the traveling speed in the liquid tank. Otherwise, the sheet may be cut and wrinkled. In addition, if the transfer work is carried out while feeding the sheet in a continuous form as described above, the waves generated when the object to be transferred is applied to the sheet in the liquid tank may cause cracks in the subsequent transfer sheet, resulting in defective products. There is a drawback that it makes it worse.

The present invention is configured such that the transfer operation can be performed after converting the continuous printed pattern support sheet into sheets in the middle, thereby preventing the transfer operation from having an adverse effect on the subsequent untransferred sheets. By eliminating the direct connection between continuous sheet feeding and sheet feeding in the liquid tank, it is possible to prevent sheet breakage, wrinkles, etc., and reduce the negative impact on untransferred sheets during transfer work. The aim is to prevent such problems and to make it possible to easily change the position of the transfer operation and the time required for transfer.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As seen in FIG. 1, the curved surface printing apparatus consists of a printing pattern support sheet feeding device A and a pattern transfer device B to a transferred object 10.

The printed pattern support sheet feeding device A holds a roll 14 of the printed pattern support sheet 12, and a roller device feeds out the printed pattern support sheet in a continuous form from there. A pattern activation device is provided for activating the pattern printed or previously printed on the sheet 12.

The pattern activation device includes a gravure cylinder 16 and an impression cylinder 18.
, a doctor 20, and a saucer 22.

Printing ink or solvent 24 is stored in the saucer.
The gravure cylinder 6 and the impression cylinder 18 are forcibly driven by the power obtained from the motor M.

Note that the sheet 12 can also be made into a printed pattern support sheet by being fed as a mere thin film from a roll and printing with a pattern activation device. The printed pattern support sheet 12 emerging from the pattern activator is then directed toward a liquid bath by suction rollers 20, 22, 24. The suction rollers 20, 22, and 24 operate at a peripheral speed slightly higher than the peripheral speed of the gravure cylinder 16 mentioned above in order to apply appropriate tension to the sheet 12 while contacting and suctioning the sheet surface opposite to the activated pattern. Rotate. Suction rollers 20, 22, 24 are motor M and belt 2
6, and the belt 26 is supported by a tension roller 28 at an appropriate position. The last suction roller 24 and the adjacent one 2
A pair of suction bars 30 are installed between the two, and a cutting blade 32 that goes in and out between them is installed.

The cutting blade 32 is directly connected to a rod of an air cylinder 34, for example. The air cylinder 34, the suction rollers 20, 22, 24, and the suction bar 30 operate in suction in relation to each other, and when the air cylinder 34 operates to lower the cutting blade 32, the suction bar 30 operates in suction to remove the sheet. 12 is suctioned and fixed, while the suction rollers 22 and 24 are released from their suction operation to release the sheet 12. During this cutting, the subsequent continuous sheet is sagged between the two suction rolls 20, 22 and is delayed. The printed pattern support sheet 36 cut into sheets by the cutting blade 32 is then fed into the liquid tank 40 by the delivery device 38.

The delivery device 38 consists of a roller and a plurality of belts, as shown in FIG. 2, and is driven by a motor M. The liquid 42 in the liquid bath is a solution for dissolving the thin film of the printed pattern support sheet, and if the thin film is made of, for example, polypynyl alcohol, water is used. and liquid 42
has a flow created on its surface.

This flow is generated by a liquid flow generator 44 . This device is supplied with liquid from a pump (not shown) through a tube 46, and the liquid is rectified and discharged from the upper slit over the entire width of the rice cake. The medicated sheets 36 are intermittently fed onto the surface of the dissolving solution 42, but these sheets 36 are prevented from coming into contact with each other and are twisted to reach the transfer position. Aoi sheet 36 to prevent
A plurality of receiving frames 48 are provided to sequentially receive.

These receiving frames 48 are circulated along the surface of the solution 42. This circulation is performed by driving a chain 50 installed on both sides of the liquid tank and a sprocket 52 that supports this chain. Power for this drive is obtained from the motor M or another power source (not shown), and the receiving frame is caused to run continuously or intermittently at a low speed that does not interfere with the transfer operation. Intermittent running can be performed by activating a fin magnetic brake, an electromagnetic clutch, etc. using an electric signal or the like taken out from a drive section in the sheet feeding device. Further, this intermittent running can be performed in the same manner in the above-mentioned delivery. The individual receiving frames 48 are formed as U-shaped frames as shown in FIG.

Note that this receiving frame 48 may be configured in an O-shape with a closed periphery. In addition, the liquid flow is used to smoothly transfer the sheet 36 onto the liquid surface and to prevent air from entering between the sheet and the liquid surface, but this effect is further enhanced. Preferably, the delivery device 38
A guide member 58 is provided between the liquid surface and the liquid surface.

As shown in the second figure, the guide member 58 is configured to reciprocate in a direction substantially parallel to the liquid level from the air cylinder 6 installed above the liquid tank 40.

This air cylinder 60 operates almost synchronously with the reciprocating movement of the cutting blade 32. The printed pattern support sheet 36 descending while being guided by the delivery 38 is fed onto the surface of the liquid 42 in the liquid tank 40 and forms the sheet 36 while floating on the liquid surface, as shown in FIG. A soluble thin film of polyvinyl alcohol or the like gradually dissolves in a liquid such as water, swells, and becomes partially dissolved, and the pattern comes to float on the liquid surface while being supported by this partially dissolved thin film. Therefore, when the article 10 having a non-flat surface, such as a curved or irregular surface, is pushed downward into the liquid as indicated by the arrow toward the printed pattern floating on the liquid surface at such a position, The pattern attached to the surface of the article 10 at the moment of contact with the liquid surface is pressed against the surface of the article by the liquid pressure acting when the article enters the liquid,
The adhesive force of the activated pattern causes it to be adhesively transferred to the surface of the article. Therefore, the transfer is completed when the article 10 is lifted out of the liquid and washed to remove the thin film. As described above, in the present invention, the printed pattern support sheet is formed into a sheet and then fed to the liquid tank.

Therefore, according to the present invention, it is no longer necessary to control the speed of the printing pattern support sheet feeding device in strict relation to the traveling speed in the liquid tank. In addition, since the sheet is formed into single sheets and surrounded by a receiving frame, it is possible to prevent waves generated when the object to be transferred is applied to the sheet on the liquid level from adversely affecting subsequent untransferred sheets. can.

Furthermore, according to the present invention, since the receiver can be driven intermittently, the transfer operation can be performed while the sheet is stopped, and the transfer position can be easily changed, so that accurate transfer can be achieved. .

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an example of a curved surface printing apparatus according to the present invention, and FIG. 2 is a partially cutaway plan view of a liquid tank portion thereof. A...Print pattern support sheet feeding device,
B... Pattern transfer device, 10... Transferred object, 12... Continuous sheet, 20, 22, 24...
...Suction roller, 30...Suction bar, 3
2... Cutting blade, 36... Sheet, 40...
...liquid tank, 42...liquid, 48...receiving frame. Figure 2: Shipboard

Claims (1)

[Claims] 1 Curved surface printing in which a printed pattern support sheet with a desired pattern printed on one side of the thin film is fed onto the surface of the thin film solution and floated, and the printed pattern support sheet is held so that the pattern can be transferred to the object to be transferred. In the apparatus, a means for supplying the continuous body of the printed pattern support sheet, a means for activating the pattern while the continuous body is being supplied by the supplying means, and a means for converting the continuous body into sheets while the continuous body is being supplied by the supplying means. a liquid tank for receiving the printed pattern support sheet formed into sheets, a solution of the thin film stored in the liquid tank, and a sheet fed onto the surface of the solution. a plurality of receiving frames that sequentially receive the solution, a circulation means that circulates the receiving frames while following the liquid surface of the solution, and a liquid that causes the surface of the solution in the liquid tank to flow in a predetermined direction. A curved surface printing device comprising a flow generating means.