JPH0577516B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a transfer device for efficiently forming a transfer film on a transfer target having a shape having rises on at least three sides around the transfer portion.

[Conventional technology]

2. Description of the Related Art Conventionally, there is an up-down type transfer device as a device for transferring onto a plate-shaped transfer object having rising portions on at least three sides around the transfer portion. The up-down type transfer device is a heating rubber attached to a heating plate that moves up and down perpendicularly to the transferred part of the transferred object, and when the transfer material comes into contact with the stacked transferred objects, the heating rubber heats up. This is a device that transfers the design of the transfer material to the object to be transferred using pressure. Further, there is a roll type transfer device as another device for transferring onto a transfer target having the above-described shape. A roll-type transfer device is a device in which a heated roll rotates while pressurizing the transfer material to bond the transfer material and the transfer material to the transfer material, thereby transferring the design of the transfer material onto the transfer material. .

[Problem to be solved by the invention]

However, since the up-down type transfer device is configured so that the heated rubber and the transfer portion of the transfer target are in surface contact with each other, the pressure is dispersed, which tends to cause poor sticking and poor adhesion. In addition, since the heated rubber and the object to be transferred are not in close contact with each other, the heat of the heated rubber is difficult to transfer to the transfer material, and it takes a long time to fully soften the adhesive layer of the transfer material and transfer completely. There was a problem of poor productivity. Furthermore, when transferring onto a quadratic curved surface, it is difficult to uniformize the pressure applied to the transferred object, which may deform or damage the transferred object, or cause poor sticking. This is particularly noticeable when the object to be transferred is something fragile such as glass. Further, as the diameter of the heating roll increases, the roll-type transfer device can only transfer to an area farther away from the rising portion of the object to be transferred. In order to transfer close to the rising part, the diameter of the heating roll can be made smaller, but the number of rotations of the heating roll increases to transfer the same area, so the amount of heat from the heating roll is lost to the transferred object. This can cause poor lubrication and poor adhesion. An object of the present invention is to solve the above-mentioned problems and to provide a transfer device that can efficiently form a transfer film on a transfer object having a shape that has rises on at least three sides around the transfer portion. be.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a roll-type transfer device in which:
The transfer device was configured such that notches parallel to the axial direction were formed and means for detecting the phase of the notches of the heating roll was provided.

[Effect]

First, a transfer target is fixed on a slide table. Next, overlay the transfer material on the object to be transferred,
The object to be transferred and the pattern on the transfer material are aligned and fixed. Next, when the notched part of the heating roll becomes parallel to the rising part, that phase is detected by a disk that rotates in synchronization with the rotation of the heating roll, and the heating roll The rotation of the heating roll stops, and the heating roll continues to descend and comes into contact with the transfer material on the object to be transferred. After that, the rotation of the heating roll is resumed. The heating roll rotates over the transfer material and heats it.
Pressure is applied to fuse the adhesive layer of the transfer material to the object to be transferred. Finally, the heating roll is raised, and the object to which the transfer layer has been transferred is removed from the slide table.

【Example】

An embodiment of the present invention will be described with reference to the drawings, taking as an example the case where a fluorescent film is transferred to the face plate of a 4-inch flat cathode ray tube (rear viewing type cathode ray tube). FIG. 1 is a front view showing an embodiment of a transfer device of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a sectional view showing the operation of the transfer device of the present invention, and FIG. 4 is a perspective view showing a face plate on which a fluorescent film is formed. 1 is a heater, 2 is a heating roll, 3 is a disk, 4 is a photoelectric sensor, 5 is a transfer material pressing arm, 6 is a transfer material, 7 is a transfer material feeding device, 8
9 indicates a face plate, and 9 indicates a slide table. The shape of the face plate 8, which is the object to be transferred, is as follows.
Size 90 x 100mm, rise 10mm, radius of curvature 200
The area where the phosphor layer is transferred is 59 x 81 mm and located 3 mm from the rising part. A transfer device for forming a fluorescent film of a cathode ray tube is a roll-type transfer device, in which a heating roll 2 is coated with
A cutout parallel to the axial direction is formed, and a means for stopping the heating roll 2 is provided so that the inner wall 2a of the cutout is substantially parallel to the rise of the closed portion 8a of the face plate 8. The shape of the heating roll 2 is 110 mm in diameter, and the cutout is V-shaped, cut out 30 mm perpendicularly from the surface to the center and at an angle of 120° from that point. In a roll-type transfer device, a heating roll is rotated and moved up and down by an air cylinder or hydraulic cylinder.
The configuration is such that when the heating roll descends, it advances along the surface of the transfer material as the heating roll 2 rotates, and transfer is performed. In order to stop the heating roll 2 at a desired phase, a disc 3 rotating in synchronization with the heating roll 2 was used. A slit 3a is provided in the disk 3 from the center to the circumference, and a V-shaped inner wall 2a of the heating roll 2 is provided.
is almost parallel to the rising portion of the closing portion 8a of the face plate 8, the photoelectric sensor 4
detected the slit 3a, and the heating roll 2 was set to stop rotating. Further, a limit switch or the like may be used as another means for detecting the phase. Furthermore, since the transfer portion of the face plate 8 has a quadratic curved surface, a spring is built into the head of the heating roll 2 so that the pressure can be adjusted along the curved surface of the face plate 8. Also,
A heater 1 for heating the heating roll 2 from the outside was arranged above the heating roll 2. The transfer material feeding device 7 is configured to supply a new portion of the transfer material 6 to the transfer device and to wind up a used portion. The transfer material 6 is supplied from a long roll, and is wound up by driving a servo motor provided on the roll on the winding side. In addition, in order to prevent the supplied transfer material 6 from sagging, a motor that rotates in the opposite direction with a weak force is provided on the supply side roll, so that a constant tension, that is, back tension, is applied to the transfer material 6. It's getting old. Further, the positioning of the transfer material 6 with respect to the face plate 8 is performed by detecting alignment marks formed on the transfer material 6 with a sensor and moving the transfer material 6 to a predetermined position by a servo motor on the winding side. It is carried out by. The transfer device configured as described above operates as follows. First, the face plate 8 is fixed on the slide table 9 (see FIG. 3a). Subsequently, the slide table 9 is moved forward. slide table 9
The forward movement of the slide table 9 may be automatically activated by using a sensor or the like when the face plate 8 is fixed to the slide table 9. Next, the transfer material pressing arm 5 is lowered so that the transfer material 6 lies on the face plate 8 (see FIG. 3b). The transfer material holding arm 5 is made of a thin and strong material so that it can transfer up to the point where the face plate 8 is about to rise. Note that the transfer material 6 was created as follows. A release layer with a thickness of 1 μm was provided on a polyester film with a thickness of 25 μm using an ink consisting of the following composition 1 using a gravure printing method, and on top of that a release layer with a film thickness of 1 μm was applied using an ink consisting of the following composition 1.
A phosphor layer with a thickness of 30 μm was provided by screen printing using an ink consisting of: Furthermore, using an ink consisting of composition 3, the film thickness was
A 5 μm adhesive layer was provided. Composition 1 (parts by weight) Acrylic resin 10 Toluene 45 Methyl ethyl ketone 45 Composition 2 (parts by weight) Acrylic resin 20 Phosphor powder (Y202S:Tb) 20 Isophorone 10 Cyclohexanone 50 Composition 3 (parts by weight) Polyamide resin 30 Ethyl cellosolve 30 Cyclohexanone 40 Continued When the inner wall 2a of the cutout of the rotating heating roll 2 becomes almost parallel to the rising edge of the closed part 8a of the face plate 8, the slit 3a provided in the disk 3 is connected to the photoelectric sensor 4.
is detected, and the rotation of the heating roll 2 is stopped. The heating roll 2 descends and at the same time as it comes into contact with the transfer material 6, the heating roll 2 starts rotating again and transfers while moving on the surface of the transfer material 6 (see FIG. 3c). The transfer conditions at this time were 200° C. and 10 cm/sec. Next, as the heating roll 2 rises, the transfer material pressing arm 5 also rises. Next, feeding of the transfer material 6 starts, and the next phosphor layer stops at a predetermined position.
After the slide table 9 is retracted, the face plate 8 on which the phosphor layer is formed is taken out (see FIG. 3d). The above steps constituted one cycle, and the phosphor layers were sequentially transferred onto the face plate 8 (see FIG. 4). The face plate on which the phosphor layer was formed in this manner was baked at 450° C. for 30 minutes to remove organic components in the transfer layer, resulting in a phosphor film made only of phosphor. The above is an example of a transfer device, and it can be used for purposes other than transferring a fluorescent film layer to a face plate. It can be used to form a pattern on a compact or to transfer a vapor-deposited transfer material to the inner surface of a cosmetic compact as a mirror.

【Effect of the invention】

The present invention provides a roll-type transfer device in which a cutout parallel to the axial direction is formed on the circumferential surface of the heating roll, and the transfer device is configured such that means for detecting the phase of the cutout of the heating roll is in contact with the cutout. Therefore, even if the shape of the object to be transferred has rises on at least three sides around the transfer portion, the transfer film can be formed on the desired portion.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a transfer device of the present invention, and FIG. 2 is a side view thereof. FIG. 3 is a sectional view showing the operation of the transfer device of the present invention. FIG. 4 is a perspective view showing a face plate on which a fluorescent film is formed. DESCRIPTION OF SYMBOLS 1... Heater, 2... Heating roll, 3... Disc, 4... Photoelectric sensor, 5... Transfer material holding arm, 6... Transfer material, 7... Transfer material feeding device, 8...
...Face plate, 9...Slide table.

Claims (1)

[Scope of Claims] 1. A transfer device characterized in that a notch parallel to the axial direction is formed on the circumferential surface of a heating roll, and means for detecting the phase of the notch of the heating roll is provided. 2. The device according to claim 1, wherein the means for detecting the phase of the notch comprises a disk that rotates in synchronization with the rotation of the heating roll and has a slit, and a photoelectric sensor that detects the slit. Transfer device.