JPH11334293A - Method and apparatus for transferring to curved surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a high efficiency of work by allowing winding with a bulk density decreased, and thereby avoiding the waste of a space and enhancing an efficiency of production. SOLUTION: A pair of nip rolls 72, 72 are interposed between a peeling roll 60 and a paper ejection roll 71, and a peripheral speed V2 of the nip roll 72 and a winding peripheral speed V3 of the paper ejection roll 71 are set into a relation of V2<V3. As such, winding is done after the support sheet 1 is extended by applying a higher tension than a tension in the winding direction in operation immediately after peeling through a speed difference between the peripheral speed V3 and V2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional transfer substrate or a transfer substrate having a non-planar surface, and in particular, a cosmetic having an uneven surface such as exterior and interior materials of a house, furniture, and home appliances. The present invention relates to a curved surface transfer method and a curved surface transfer device that are effective for transferring a pattern to the uneven surface of a plate.

[0002]

2. Description of the Related Art Conventionally, decorative boards having decorations such as pictures on a base material surface of a decorative board using a transfer sheet have been used for various purposes. In this case, if the surface of the base material is flat, it is relatively easy to decorate a picture by transfer, but it is not easy to decorate a three-dimensionally deep uneven surface.

Japanese Patent Application Laid-Open No. 9-315095 discloses an improved transfer method for an uneven substrate based on a novel technical concept, as shown in FIG.
The transfer layer side of the transfer sheet S composed of the support sheet 1 and the transfer layer 2 unwound from the sheet supply device 20 is opposed to the uneven surface side of the base material B to be transferred carried into the chamber 33 by the 33, the solid particles P collide with the support sheet 1 side of the transfer sheet S while heating the transfer sheet S by the heating device 40, and the collision pressure is used as a pressing force, so that the transfer-receiving substrate B After the transfer layer adheres to the base material B to be transferred, the support sheet 1 of the transfer sheet S is moved from the position of the peeling roller 60 on the downstream downstream of the chamber 33 after the transfer layer adheres to the base material B. There has been proposed a device in which a transfer layer is transferred to a substrate to be transferred by being peeled off while being wound on a paper discharge roll 71 of a winding device 70.

In this example, solid particles P such as granular zinc are sent from a hopper 31 to an ejector 32 in a chamber 33, accelerated by a wind pressure from a blower 32b, and transferred to a transfer sheet S from a nozzle 32a. It is gushing toward. Then, the solid particles P having been subjected to the collision with the transfer sheet S collect in the lower part of the chamber 33, and are sucked from there through the drain pipe 34 by the suction force of the vacuum pump 36 and collected in the original hopper 31. Are reused.

According to this transfer method and apparatus, the solid particles P are caused to collide with the transfer sheet S, and the collision pressure is used as the pressing force so that the solid particles P are made to follow the transfer sheet S along the uneven surface of the base material B to be transferred. Thus, it is possible to obtain a decorative material that is reliably transferred and decorated on a large three-dimensional uneven surface without using a rubber roll or the like for pressing. In addition, on the convex portion of the large irregular surface, the inside of the concave portion (the bottom surface or the side surface which is a connecting portion between the convex portion and the bottom portion) can be transferred. Further, on the convex portion of the large irregular surface,
More fine irregularities (eg hairline, satin finish, etc.)
There is an advantage that even when there is, it is possible to easily decorate by transfer even in the concave portion of the fine unevenness.

[0006]

In the above transfer method, after the transfer, the support sheet is peeled off and taken up by a take-up roll (paper discharge roll) of a suitable take-up means.
However, in this transfer method, fine unevenness due to collision of solid particles is formed on the entire surface of the transfer sheet, and this transfer method originally transfers a large three-dimensional uneven surface, that is, a deep uneven surface. The purpose is that the support sheet peeled off after the transfer becomes a bulky state in which deep irregularities are formed, so that the discharge roll has a large winding diameter in a short time. turn into. Therefore, it is necessary to secure a large space on the side of the paper discharge roll or to frequently exchange the paper discharge roll. In particular, in the latter case, the transfer operation is inevitably interrupted due to the exchange of the discharge roll, which causes a reduction in the operation efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to cause solid particles to collide with a support sheet side of a transfer sheet and use the collision pressure to make a transfer target substrate. In a method and an apparatus for transferring a picture to an uneven base material by pressing a transfer sheet along an uneven surface of a material to transfer the picture to the uneven base material, the support sheet after the transfer is wound around a discharge roll with a reduced bulk density. It is possible to reduce waste of space, thereby improving production efficiency and securing high work efficiency.

[0008]

Means for Solving the Problems In order to achieve the above-mentioned object, the method of transferring to an uneven substrate according to the present invention is basically the same as that described in JP-A-9-315095. On a three-dimensional transfer substrate or a transfer substrate having a non-planar surface, the transfer layer side of a transfer sheet including a support sheet and a transfer layer is opposed to the support sheet side of the transfer sheet. The solid particles collide, and the collision pressure is used to press the transfer sheet along the contour of the substrate to be transferred, and after the transfer layer adheres to the substrate to be transferred, the support sheet is peeled off and peeled. The transfer layer is transferred to the substrate to be transferred by winding the support sheet thus obtained by the winding means.

In the present invention, the support sheet after the peeling is passed through a predetermined area with a tension higher than the tension in the winding direction immediately after the support sheet is peeled. And a winding means. According to the method of the present invention, after the transfer of the pattern layer, the tension in the winding direction of the support sheet immediately after being peeled off from the substrate to be transferred is a relatively low tension in a range that does not hinder the transfer. And the transfer is performed in the same manner as in the prior art. The support sheet then travels in a certain area with a higher tension, i.e. in a state of being pulled in the winding direction. Thereby, the irregularities of the support sheet formed by the collision of the solid particles and the pressure contact with the irregular surface are leveled. Since the support sheet is wound around the discharge roll in that state (that is, in a state where it is stretched flat), the winding bulk density at the discharge roll is increased, and the size is reduced. The method of bringing the support sheet into a high tension state is arbitrary, but changing the running speed of the support sheet to a speed higher than the previous running speed in the above-mentioned region is an effective method.

In order to achieve the above object, a curved transfer device according to the present invention comprises a support sheet and a transfer layer on a three-dimensional substrate to be transferred or a substrate having a non-planar surface. The transfer layer side of the transfer sheet is opposed, the solid particles collide against the support sheet side of the transfer sheet, and the collision pressure is used to press the transfer sheet along the contour of the substrate to be transferred. A curved surface transfer device configured to transfer a transfer layer to a substrate to be transferred, wherein the mounting value is at least a solid particle ejection unit that ejects solid particles, and a solid particle ejection unit that faces the transfer substrate to the solid particle ejection unit. Substrate transfer means for transferring the transfer sheet to a position, a transfer sheet supply means for positioning the transfer sheet between the solid particle ejection means and the transfer target substrate, and after the transfer layer is bonded to the transfer target substrate, The support sheet is peeled off and the support sheet is peeled off And the take-up means for winding up,
Wherein the winding means has a tension in the winding direction of the support sheet between the peeling position and the winding position of the support sheet that is higher than immediately after the peeling. There is provided a tension changing means for passing through a predetermined area.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a curved surface transfer method and a curved surface transfer apparatus according to the present invention will be described. FIG. 1 is a conceptual diagram outlining a transfer method according to the present invention, and is substantially the same as a conventional method. The transferred substrate B has an uneven surface 401,
., And at the time of transfer, the transfer layer 2 side of the transfer sheet S including the support sheet 1 and the transfer layer 2 is opposed to the uneven surface side (FIG. 1A). In this state, a large number of solid particles P are ejected from an appropriate ejection means (not shown) and collided with the support sheet 1 side of the transfer sheet S, and the collision pressure is used as a transfer pressure to form the transfer sheet S. Is pressed against the substrate to be transferred B (FIG. 1B). Thereby, the transfer-receiving substrate B
The transfer layer 2 can be adhered to the uneven surface of the base material B to be transferred. Thereafter, the support sheet 1 of the transfer sheet S is peeled and removed (FIG. 1C), whereby a decorative plate D in which the transfer layer 2 is transferred to the uneven surface of the base material B to be transferred is obtained (FIG. 1D). As described above, the support sheet 1 after peeling is not a flat surface, but has many large and small irregularities.

One embodiment of a curved surface transfer apparatus 100 for carrying out the above-described curved surface transfer method will be described with reference to FIG. The transfer device 100 of FIG. 2 is basically the same as the curved transfer device described with reference to FIG. 10, and uses a long transfer sheet S to transfer a three-dimensional transfer substrate B having an uneven surface. The decorative layer and the like are sequentially and continuously transferred. Apparatus 100
Is a substrate transport device 10 for transporting the substrate B to be transferred, a sheet supply device 20 for supplying the transfer sheet S, and a sheet for peeling and winding the support sheet 1 from the transferred transfer sheet S. The solid particles P are ejected from the ejector 32 in the take-up device 70 and the chamber 33 to collide with the support sheet 1 side of the transfer sheet S to sequentially apply an impact pressure, and the transfer sheet S is transferred to the transfer-receiving substrate. A collision pressure applying unit 30 is provided for pressing along the irregularities of B.

The chamber 33 has an entrance 3 for the substrate B to be transferred.
Except at 0a and 30b, at least the opening of the transfer sheet S and the transfer substrate B exposed to the collision pressure, and at least the opening of the ejector 32 are covered from the outside so that the solid particles P do not leak into the outside working atmosphere. . For this reason, the pressure inside the chamber 33 is preferably made lower (negative pressure) than the outside. The substrate transfer device 10 includes a transfer drive roller row 11, a conveyor belt 12 of an endless track type, and the like, and transfers the transfer target substrate B further downstream via the peeling roller 60.

In this example, the sheet feeding device 20
Paper feed roll 21, heating roller 22, laminating roller 2
After the transfer sheet S is heated and softened by passing through the heating roller 22, the transfer sheet S
At a position upstream from the entrance 30a of the substrate B, the laminate roller 23 is lightly pressed on the convex portion on the surface of the base material B to be transferred into a laminated state.

The sheet winding device 70 includes a chamber 33.
The support sheet 1 is peeled off from the transfer sheet S after the transfer, and is wound up on the paper discharge roll 71. In this example, the sheet winding device 70
Is a peeling roll 60 that rotates at a peripheral speed v1 substantially equal to the transport speed of the substrate B to be transferred;
And a pair of nip rolls 72, 72, which are located between the paper discharge roll 71 and the support sheet 1 and are fed at a predetermined peripheral speed while sandwiching the support sheet 1.

The release roll 60 and the nip roll 7
The tension of the support sheet 1 in the section between 2 and 72 is kept to a necessary and sufficient degree to peel the support sheet 1 from the transfer layer 2 and the transfer-receiving substrate B. Therefore, the peripheral speed of the pair of nip rolls 72, 72 is slightly higher than the peripheral speed v1 of the peeling roll 60 (depending on the material of the support sheet, the cross-sectional area, and the uneven shape of the surface of the transfer-receiving substrate, It is set to a peripheral speed v2 (usually about 1% faster).

Further, as will be described in detail later, the tension of the support sheet 1 in the section between the nip rolls 72, 72 and the paper discharge roll 71 is sufficient to crush the irregularities of the support sheet 1. For this reason, the winding peripheral speed v3 of the discharge roll 71 is faster than the peripheral speed v2 of the pair of nip rolls 72, 72 (although it may be adjusted depending on the material of the support sheet, cross-sectional area, uneven shape, etc., usually 10%). About fast)
Set to peripheral speed v3. Note that the peripheral speed v3 of the discharge roll 71 is a peripheral speed when the support sheet 1 is wound, and is appropriately set so that the peripheral speed v3 is substantially constant from the start to the end of winding. The control mechanism controls the rotation speed of the paper discharge roll 71.

The collision pressure applying unit 30 includes a hopper 31 for storing and supplying the solid particles P to the ejector 32, an ejector 32, a drain pipe 34 as a return path to the hopper 31 for the solid particles P after collision, a solid particle P, A separation device 35 for separating P from a gas, a vacuum pump 36 for sucking and exhausting a carrier gas for the solid particles P, and the like are provided. In performing the transfer, a paper feed roll 21 in which a transfer sheet S including a support sheet 1 and a transfer layer 2 is wound in a roll shape is attached, the transfer sheet S is pulled out from the paper feed roll 21, and a heating roller 22 and a laminating roller After passing through the inside of the chamber 33 from the inlet 30 a through the outlet 23, it is drawn out from the outlet 30 b, passes through the separation roller 60, passes between the pair of nip rolls 72, 72, and is wound around the paper discharge roll 71.

In this state, when the sheet supply device 20 and the sheet take-up device 70 are operated, the transfer sheet S is unwound from the supply roll 21 while a predetermined tension is applied. In that state, the uneven surfaces 401, 4
, 403,... Are transferred to the chambers 3 at predetermined intervals by a row of driving rotary rollers 11 for conveyance.
Send it out to 3. As described above, the transfer sheet S softened by being heated by the heating roller 22 at the position of the laminating roll 23 is provided on the convex portion of the uneven surface of the transferred base material B.
Are stacked, and both are in the chamber 3 at the same feed rate.
3 sequentially enters. In the chamber 33, the substrate B to be transferred is conveyed by the conveyor belt 12 of an endless track type.

On the other hand, solid particles P, for example, spherical granular zinc, are supplied from a hopper 31 to an ejector 32 in a chamber 33.
Where it is accelerated by an impeller as described later and jets out toward the transfer sheet S in the chamber 33. The transfer sheet S is pressed against the transfer base material B by the collision pressure of the solid particles P jetted from the jetting device 32, and the transfer sheet S is also extended and deformed into the concave portion of the uneven surface of the transfer target substrate B. Thus, the transfer layer 2 is formed to follow the contour of the uneven surface shape of the substrate to be transferred B, and the transfer layer 2 adheres to the substrate to be transferred B. Furthermore, the transfer sheet S enters in a concave shape due to the solid particle collision pressure between the continuously transferred transfer base materials B, and the transfer layer 2 also adheres to the side surface of the transfer base material B. (See FIG. 1B). The transfer-receiving substrate B to which the transfer sheet S adheres is
The transfer sheet S is cooled by allowing it to cool before it goes out of the chamber 33.

On the other hand, the solid particles P that have been subjected to collision with the transfer sheet S collect at the lower part of the chamber 33, are sucked by the drain tube 34 therefrom, and collected by the original hopper 31.
Reused. Further, the air in the chamber 33 for collecting and transporting the solid particles P is also discharged together with the solid particles P into the drain pipe 34.
, And is conveyed to a conventionally known separation device 35 for the airflow and solid particles above the hopper 31.

The transferred base material B and the transfer sheet S that have come into contact with each other reach the position of the separation roller 60 downstream of the chamber 33, where the support sheet 1 is separated from the transferred base material B. As a result, a decorative layer or the like is transferred and formed as the transfer layer 1 of the transfer sheet S over the entire uneven surface of the base material B to be transferred.
A cosmetic material D is obtained. The above-described configuration is substantially the same as that of Japanese Patent Application Laid-Open No. 9-95, except that the support sheet 1 after passing through the peeling roller 60 is wound around the paper discharge roll 71 between the pair of nip rolls 72, 72. It may be the same as that described in Japanese Patent No. 315095, and a detailed description thereof will be omitted.

As described above, in this apparatus, the peripheral speed v1 of the peeling roll 60 and the pair of nip rolls 72, 7
2 and the take-up peripheral speed v of the discharge roll 71
3 has a relationship of v1 <v2 <v3. Then, the pair of nip rolls 72, 72 pass through the opposing surfaces by a pulling force in a winding direction caused by a difference between a peripheral speed v3 of the discharge roll 71 and a peripheral speed v2 of the nip rolls 72, 72. The pressure is applied so that the supporting sheet 1 does not slip between the pair of nip rolls 72, 72. Further, thereby, the propagation of the tension between the high tension portion on the paper discharge roll 71 side and the low tension portion on the peeling roll 60 side of the support sheet 1 is blocked by the nip rolls 72, 72. Can be placed under different tensions.

The support sheet 1 that has started peeling at the position of the peeling roll 60 has a relationship between the circumferential speed v1 of the peeling roll 60 and the circumferential speed v2 of the pair of nip rolls 72, v1 <v1 <.
Since the transfer speed is v2, the transfer sheet S receives a tension slightly higher than the tension applied to the transfer sheet S at the time of transfer. The difference between v1 and v2 is set small so as not to cause inconvenience in transfer. By setting v2 slightly faster than v1, the support sheet 1 can be transferred from the transfer sheet S, which is deeply recessed between the transfer base material B and the transfer base material B, as shown in the figure. Peeling can be reliably performed without breaking.

The difference between the winding peripheral speed v3 of the discharge roll 71 and the peripheral speed v2 of the nip rolls 72, 72 is that the support sheet 1 is not broken and that the pair of nip rolls 7
It is set to a large value on condition that no slip occurs between 2,72. As a result, the support sheet 1 is placed in a high tension state as if the one end was fixed between the pair of nip rolls 72 and 72 while the other end was pulled from the discharge roll 71 side. The paper is wound by the paper discharge roll 71 while maintaining the state.

Thus, between the pair of nip rolls 72, 72 and the winding position of the paper discharge roll 71, the support sheet 1 takes up the winding direction given on the upstream side of the pair of nip rolls 72, 72. Than the tension of
You will receive higher tension, and for that,
The support sheet 1 extends in the winding direction in that region.
The stretching of the support sheet 1 caused by the collision of the solid particles P and the pressure contact with the uneven surface (FIG. 1)
C) is wound up on the paper discharge roll 21 in a state where it is stretched flat. For this reason, the bulk of the support sheet can be reduced. In the above description, the relationship between the peripheral speed v1 of the peeling roll 60 and the peripheral speed v2 of the pair of nip rolls 72, 72 is described as v1 <v2. However, even if v1 = v2, the intended purpose is Achievable.

FIG. 3 shows another example of the sheet winding device 70. In this example, dancer rollers D1 and D2 are further arranged between the peeling roll 60 and the pair of nip rolls 72, 72 and between the pair of nip rolls 72, 72 and the paper discharge roll 71. The dancer rollers D1 and D2 are fixed to the machine frame via springs 73, 73, act on the support sheet 1 passing therethrough from above, move up and down, and In this example, a peeling roll 60 and a pair of nip rolls 72,
72, the pressing force P1 of the dancer roller D1 on the support sheet 1 and the pair of nip rolls 7
The pressing force P2 of the dancer roller D2 disposed between the sheet discharge rollers 71 and 72 and the paper discharge roll 71 is in a relationship of P1 <P2.

In this case, the support sheet 1 that has started peeling at the position of the peeling roll 60 receives the pressing force P1 of the dancer roller D1 between the peeling roll 60 and the pair of nip rolls 72. Body sheet 1
Is stretched by receiving a tension higher than the tension applied to the transfer sheet S at the time of transfer. However, the pressing force P1
Is small, no inconvenience occurs in the transfer. The pressing force P <b> 1 facilitates peeling of the support sheet 1 from the transfer sheet S that has entered a deep recess between the transfer-receiving base material B and the transfer-receiving base material B.

The pressing force P2 of the dancer roller D2 is set on condition that the support sheet 1 does not break and that no slip occurs between the pair of nip rolls 72.
Large value. As a result, the support sheet 1 is in a state where a higher tension is applied between the pair of nip rolls 72 and 72 and the winding position of the paper discharge roll 71 than before, and is pressed down downward in the figure. Being
The mileage increases. As a result, the support sheet 1
Stretches in the winding direction in that area, and by the stretching,
The unevenness of the support sheet 1 is flattened and stretched, and the support sheet 1 is wound around the paper discharge roll 21. In this embodiment, a pair of nip rolls 72 and 72 and a discharge roll 71
The peripheral velocities v2 and v3 may be set as a velocity difference that can absorb the distance that the support sheet 1 extends due to the pressing force of the dancer roller D1 and the dancer roller D2. In the above description, the dancer roller D1 is used, but the intended purpose can be achieved without using the dancer roller D1.

As described above, according to the present invention, the support sheet after the transfer is wound by the winding device in a state where the irregularities formed thereon are stretched flat, so that the winding becomes compact. In addition, it is possible to eliminate waste of the space on the discharge roll side and to reduce the frequency of replacing the discharge roll. As a result, it is possible to improve production efficiency and secure high work efficiency.

Next, details of each member in the present invention will be described. First, as the transfer substrate B of the present invention, the transfer surface may be an uneven surface or a flat surface, as described in detail in JP-A-9-315095. The present invention achieves the intended object even when the irregularities are three-dimensional irregularities. In the present invention, since the collision pressure of a group of solid particles that can behave fluidly is used, the planar direction of the pressure application region is completely free with respect to the three-dimensional shape of the surface irregularities. Furthermore, the transfer substrate of the uneven surface having fine irregularities superimposed on the large irregularities, or
A substrate to be transferred having a surface to be transferred to the bottom of the concave portion or the inner side surface of the concave portion on the uneven surface is also possible. The large irregularities and the minute irregularities are, for example, as shown in FIGS.
Are composed of large pattern irregularities 401 and 402 and fine irregularities 403 on the convex portions 402. The large pattern irregularities have a step of about 1 to 10 mm and a width of the concave of 1 to 1 mm.
About 0 mm, the width of the protrusion may be about 5 mm or more, and the fine unevenness is smaller than the large unevenness in both the step and the width, and specifically, the step is 0.1 to About 5 mm, the width of the concave portion and the width of the convex portion are 0.1
mm or more, and may be less than about の of the width of the convex portion of the large uneven shape.

Specific examples of the uneven pattern of the decorative material, which is composed of a combination of large and small irregularities and fine irregularities and has three-dimensional surface irregularities, include joints and grooves as large irregularities. It has a two-dimensional array pattern of tiles, bricks, stones, etc., and stucco-like as fine irregularities on it,
Irregular patterns on spray-painted surfaces such as lysine, stone-grained irregularities such as cleaved surfaces of granite or irregularities on stone surfaces such as travertine marble, or large irregularities, such as joints, grooves, seams, and sane (real) And a woodgrain pattern having fine grooves on a conduit groove, a hairline, and the like.

The material of the substrate to be transferred is arbitrary.
Non-porcelain ceramic boards such as calcium silicate board, extruded cement board, ALC (lightweight foamed concrete) board, GRC (glass fiber reinforced concrete) board,
Wood veneers such as cedar, pine, lauan, and veneer, wood plywood, particle board, wood board such as wood medium density fiber board (MDF), metal plate such as iron, aluminum, copper, etc. Ceramics such as glass, resin molded products such as polypropylene, ABS resin, and phenol resin may be used. When a liquid is used as the solid particle accelerating fluid and solid particles are ejected together with the liquid, a substance that is insoluble and non-absorbable in the liquid is preferable. For example, a metal plate, a resin molded product, ceramics such as ceramics and glass, and the like are used.

At the time of laminating the transfer sheet S on the base material B, an adhesive may be applied to the surface of the base material B to form an adhesive layer on the base material. The adhesive may also be formed on the sheet side as an adhesive layer that becomes a part of the transfer layer. If the substrate to be transferred is a two-dimensional uneven surface, the support sheet 1 is made of paper having no stretchability (however, if the solid particle accelerating fluid is a liquid, a sheet insoluble in the liquid is selected. And the like are possible, but in order to apply the present invention to a three-dimensional uneven surface exhibiting its true value, it is preferable to use a stretchable support sheet at least at the time of transfer. Due to the stretchability, when the collision pressure of the solid particles is applied, the transfer sheet can be closely adhered and transferred to the inside of the concave portion on the surface of the transfer-receiving substrate. The stretchability of the entire transfer sheet is mainly governed by the stretchability of the support sheet. Therefore, in addition to a conventionally known thermoplastic resin film, a rubber film that can be stretched even at room temperature can be used as the support sheet. In the case of a thermoplastic resin film, there is almost no stretchability when forming a transfer layer such as a decorative layer, and at the time of transfer, sufficient stretchability is exhibited by heating, and after cooling, the deformed shape is maintained, and the shape due to elasticity is maintained. It is particularly suitable for use in the present invention because it does not cause restoration.

As a specific example of the support sheet, even in the case of a biaxially stretched polyethylene terephthalate film which has been widely used in view of stretchability, depending on the surface unevenness,
By setting heating conditions, collision pressure conditions and the like, necessary and sufficient extensibility can be developed, so that transfer to an uneven surface is possible.However, a material that easily develops extensibility at low temperature and low pressure, for example, poly Low stretch or no copolymer polyester film such as butylene terephthalate or ethylene terephthalate isophthalate copolymer, polyolefin film such as polypropylene film, polyethylene film, polymethylpentene film, polyvinyl chloride resin film, nylon film, etc. Stretched films and rubber (elastomer) films such as natural rubber, synthetic rubber, urethane elastomers and olefin elastomers are also preferred support sheets. The thickness of the support sheet may be usually from 20 to 100 μm.

When a liquid is used as the solid particle accelerating fluid, it is possible to use a resin film that swells but is insoluble in the liquid that comes into contact with the liquid during transfer. As an example of such a swellable and insoluble resin film, Japanese Patent Application Laid-Open No.
JP-A-150208, JP-B-61-3276, etc. are polyvinyl alcohol-based films having an average degree of polymerization of 300 to 3000 and a degree of saponification of 65 to 9
A film having a thickness of 7 mol% and a thickness of 20 to 100 μm is typical.

Further, the support sheet 1 may have
A release layer may be provided on the transfer layer side to improve the releasability from the transfer layer. This release layer is peeled off from the transfer layer together with the support sheet when the support sheet is peeled off.
As the release layer, for example, a simple substance such as a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, a wax, or a mixture containing these is used.

If an irregular pattern is provided on the surface of the support sheet in contact with the transfer layer, the irregular pattern can be formed on the surface of the transfer layer after the transfer. The uneven pattern is, for example,
Nashiji, hairline, line-shaped grooves, irregularities on the cleavage surface of granite, wood-grain conduit grooves, wood-grain annual rings, cloth texture surface texture, leather squeezing, characters, geometric patterns, etc. The uneven pattern is formed by embossing, sandblasting, or hairline processing the resin sheet of the support sheet by hot pressing, or by using a resin having a releasing property as a binder on the support sheet. (Consisting of a two-component curable urethane resin, silicone resin, melamine resin, polyfunctional acrylate or methacrylate monomer or prepolymer that can be cross-linked by ultraviolet light or electron beam, etc.), and embossed by silk screen printing or the like. There is a method in which a shaping layer is provided by printing to form a support sheet having the shaping layer. The shaping layer also has the function of the release layer.

The transfer layer comprises at least a decorative layer, and a release layer, an adhesive layer, etc. may be a component of the transfer layer as appropriate. The decorative layer is formed by a known evaporation method such as gravure printing, silk screen printing, a pattern layer formed by printing a pattern or the like with a conventionally known method and material such as offset printing, a metal such as aluminum, chromium, gold, and silver. It may be a metal thin film layer formed partially or over the entire surface, or the like, depending on the application. Patterns include wood grain, stone grain, cloth grain, tile pattern, brick pattern, leather pattern, text, geometric pattern, etc., according to the surface irregularities (particularly, convex surface) of the substrate to be transferred. Use solid or the like.

In the case where the transfer layer is formed of a pattern, it is preferable to select a transfer layer in which the misregistration with the uneven shape of the substrate to be transferred is inconspicuous at the stage of the transfer step. For example, in the case of a wood grain pattern, it is a pattern of a root nodule heather or a plate grain material, in the case of a stone grain pattern, it is granite, marble, sand grain, and in the case of a geometric pattern, it is polka dot. Even for patterns such as floral patterns and arabesque patterns, the position of the pattern is limited only to the convex portions of the substrate to be transferred, and is sufficiently separated from the edge with the concave portions such as joint grooves (more than the target variation). If they are arranged only in the area, no problem occurs.

The ink for a picture layer comprises a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto. A single material such as an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a cellulosic resin, a polyurethane resin, a fluororesin, or a mixture containing these is used for the binder. As the pigment of the colorant, inorganic pigments such as titanium white, carbon black, red iron oxide, graphite, and ultramarine blue, and organic pigments such as aniline black, quinacridone, isoindolinone, and phthalocyanine blue are used.

In order to adjust the releasability between the support sheet or the release layer and the decorative layer, and to protect the surface of the decorative layer after transfer, a release layer is provided between these layers. The provision is the same as that of a conventionally known transfer sheet. The release layer is transferred to the transfer-receiving substrate together with the decorative layer during transfer, and covers the surface of the decorative layer. Further, as a means for easily removing air remaining between the transfer sheet and the transfer-receiving substrate at the time of transfer, a large number of small holes penetrating through all layers of the transfer sheet may be formed in the transfer sheet as necessary. .

When the transfer base material B is coated with an adhesive, a sealer, an easy-adhesion primer, a base coat, etc. before transfer, spray coating, curtain flow coating,
A coating method such as brush coating with a sponge roller can be used. Among these, sponge roller coating is preferable for efficiently and uniformly coating the uneven surface. afterwards,
The transfer sheet S is pressed.

The solid particles P used for pressing the transfer sheet S include non-metallic inorganic particles which are inorganic powders such as glass beads, ceramic beads, calcium carbonate beads, alumina beads, zirconia beads, alundum beads, corundum beads, and the like. Iron, carbon steel, iron alloys such as stainless steel, aluminum, or aluminum alloys such as duralumin, titanium, metal particles such as metal beads such as zinc, or fluororesin beads, nylon beads, silicone resin beads, urethane resin beads, Organic particles such as resin beads such as urea resin beads, phenol resin beads, and crosslinked rubber beads can be used.
When liquid water is used as the solid particle accelerating fluid, the solid particles are preferably non-metals such as stainless beads, glass beads, ceramic beads, and resin beads that do not rust or corrode with water. The shape is preferably spherical, but spheroidal, polyhedral, scaly, amorphous, and other shapes can also be used. The particle size of the solid particles is usually 10 to
It is about 1000 μm.

The solid particles can also serve as heating means and cooling means. When heated solid particles are used, the activation of the adhesive by heating and the promotion of crosslinking and curing thereof, or the improvement of the stretchability by heating the transfer sheet can be performed together with the pressing of the transfer sheet. In this case, the transfer sheet and the substrate to be transferred may be heated to some extent by another heating method before the application of the collision pressure. For the purpose of promoting cooling after bonding, solid particles having a temperature lower than the temperature of the adhesive at the time of bonding can be used as the cooling solid particles. Further, the solid particles may be used in combination with a part or all of the solid particles as heated solid particles or cooled solid particles, or after colliding heated solid particles and then colliding cooled solid particles. In addition, the transfer sheet, the substrate to be transferred, the adhesive, etc., which need to be heated by other heating methods, are sufficiently heated, and the cooling solid particles are used for the formation, adhesion, and cooling of the transfer sheet. It can be done at the same time.

As the solid particle ejection means 32, an ejection device using, for example, a rotating impeller as a particle accelerator, or an ejection device using an ejection nozzle is used. The ejector using the impeller accelerates and ejects solid particles by rotation of the impeller. An ejector using an ejection nozzle uses a solid particle acceleration fluid to accelerate and transport solid particles with a high-speed fluid flow of the fluid and eject the solid particles together with the fluid. Sandblasting, shot blasting, shot peening and the like used in the blasting field can be used for the impeller and the blowing nozzle. For example, a centrifugal blast device is used for the impeller, and a pressurized or suction blast device, a wet blast device, and the like are used for the blowing nozzle. The centrifugal blast device accelerates and ejects solid particles by the rotational force of the impeller. A pressurized blasting device ejects solid particles together with air while being mixed with compressed air. The suction blast device sucks solid particles into the negative pressure section generated by the high-speed flow of compressed air,
Spouts with air. The wet blast device mixes and ejects solid particles with a liquid.

As the solid particle ejection means 32, a method of accelerating solid particles using free fall due to gravity, a method of accelerating magnetic particles by a magnetic field, and the like are employed other than the ejection nozzle and the impeller. It is also possible. In the case of an impeller, a solid particle ejecting unit using gravity and a magnetic field, the solid particles can be ejected toward the transfer sheet in a vacuum. 5 to 8 show conceptual diagrams of an example of an impeller that can be used as a particle accelerator of an ejector. These correspond to centrifugal blasting devices used in the blasting field.

In the drawing, the impeller 812 includes a plurality of blades 8.
13 is fixed on both sides by two side plates 814, and the center of rotation is a hollow portion 815 without the blades 813. Further, a direction controller 816 (see FIG. 7) is provided inside the hollow portion 815. The direction controller 816 has a hollow cylindrical shape having an opening 817 partially open in the circumferential direction and has the same rotation axis as the rotation axis of the impeller 812.
It is freely rotatable independently of. When using the impeller,
The opening 817 of the direction controller 816 is fixed so as to face an appropriate direction. Further, inside the direction controller 816, there is another impeller having a hollow inside and the same rotation axis as the rotation axis of the impeller 812 as a sprayer 818 (see FIG. 7). The spreader 818 rotates with the outer impeller 812. A rotating shaft 819 is fixed to the center of rotation of the side plate 814. The rotating shaft 819 is rotatably supported by a bearing 820 and is driven and rotated by a rotating power source (not shown) such as an electric motor. Rotates. The rotating shaft 819 is provided with two side plates 8 having blades 813 between them.
14 does not penetrate, and forms a space without a shaft.

Then, the solid particles P
Is supplied from a hopper or the like through a transport pipe. Usually, the solid particles P are supplied from above (directly above or obliquely above) the impeller. The solid particles P supplied into the sprayer scatter outside by the impeller of the sprayer. The scattered solid particles P are emitted only in the direction allowed by the opening 817 of the direction controller 816, and the blades 813 and 81 of the outer impeller 812 are discharged.
3 is supplied. Then, it collides with the blade 813,
It is accelerated by the rotational force of the impeller 812 and jets from the impeller.

The ejection direction of the solid particles is shown in FIGS.
, But may be horizontal or obliquely downward (not shown). 8A and 8B are conceptual diagrams of the ejection direction control for adjusting the ejection direction of the solid particles by setting the direction of the opening 817 of the direction controller 816 (in FIGS. 8A and 8B, the direction controllers are in the illustrated positions, respectively). Fixed). Note that the direction controller 816 can also adjust the ejection amount of the solid particles by adjusting the size of the opening in the circumferential direction and the width direction.

In FIG. 6, the rotary shaft 819 is configured so as to be only outside the side plate 814 and not penetrate to the hollow portion 815. In addition, the rotary shaft 819 is thinner than the diameter of the hollow portion. May be penetrated into the hollow portion, or the inside of a hollow cylindrical rotary shaft provided with an opening through which solid particles pass may be used as a hollow portion (not shown). The shape of the blade 813 is typically a rectangular flat plate (a rectangular parallelepiped) as shown in FIG. 5 to FIG. 8. In addition, a curved curved plate, a propeller shape such as a screw propeller, or the like can be used. , Select according to purpose. In addition, the number of blades is selected from a plurality of, usually, a range of up to about 10 blades.

Depending on the shape of the impeller, the number of the impellers, the rotation speed, and the combination of the mass and the supply speed and the supply direction of the solid particles, the opening size and the direction of the direction controller, the ejection (blow) direction of the accelerated solid particles, Adjust ejection speed, projection density, ejection diffusion angle, etc. In addition, the impeller 812 described above includes:
Furthermore, if necessary, only a portion for ejecting and ejecting solid particles is opened, and by providing an ejection guide (not shown) for covering the periphery of the impeller, the ejection direction of solid particles can be uniformed.
The direction of ejecting solid particles can also be controlled. The shape of the opening of the ejection guide is, for example, a hollow cylindrical shape, a polygonal column shape,
It has a conical shape, a polygonal pyramid shape, a fish tail shape, and the like.

The size of the impeller 812 is usually 5 to 60 in diameter.
cm, the width of the blade is about 5 to 20 cm, the length of the blade is almost the diameter of the impeller, and the rotation speed of the impeller is 500 to
It is about 5000 [rpm]. The ejection speed of solid particles is about 10 to 50 [m / s], and the projection density is 10 to 150
[Kg / m ² ]. The material of the impeller blades may be appropriately selected from ceramics, metals such as steel, high chromium cast steel, titanium, and titanium alloys. Since the solid particles are accelerated by contact with the blade, it is preferable to use a high chromium cast steel or ceramic having good wear resistance for the blade.

FIG. 9 shows an ejection device 84 using an ejection nozzle as an ejection device for ejecting solid particles P together with a fluid.
FIG. 4 shows a conceptual diagram of an example of 0. Note that the ejector 84 shown in FIG.
Numeral 0 is an example of an ejector in which a gas is used as a solid particle acceleration fluid, and the gas and the solid particles are mixed and ejected when the solid particles are ejected. The jetting device 840 shown in the figure includes an induction chamber 841 for mixing the solid particles P and the fluid F, an internal nozzle 842 for jetting the fluid F into the induction chamber 841, and a nozzle opening 843.
Nozzle portion 84 for ejecting solid particles P and fluid F from the nozzle
Consists of four. When the fluid F sent from a compressor or a blower (not shown) through an appropriate pressurized tank (not shown) is ejected from the internal nozzle 842 and ejected from the nozzle opening 843 of the nozzle 844 via the guide chamber 841, In the induction chamber 841 in the vessel, a negative pressure is created by the action of the fluid flowing at high speed,
The negative pressure guides and mixes the solid particles into the fluid flow, accelerates and transports the solid particles with the fluid flow, and ejects the solid particles together with the fluid flow from the nozzle opening 843 of the nozzle 844.

Note that the blowing nozzle includes a blowing nozzle using a liquid as a solid particle accelerating fluid. In the case of liquid, the fluid and solid particles are mixed and stored in a pressurized tank (not shown) by, for example, a pump (not shown, when the fluid is a liquid), and the mixed solution is discharged from the nozzle opening of the blowing nozzle. What gushes out is used. The shape of the nozzle opening has a hollow cylindrical shape, polygonal column shape, conical shape, polygonal pyramid shape, fish tail shape, or the like. The blowing nozzle may have a single opening, or may have an inside partitioned into a honeycomb shape. The fluid pressure is generally about 0.1 to 100 kg / cm ^{2 in} spray pressure. The flow velocity of the fluid flow is usually about 1 to 80 m / sec for the liquid flow, and usually about 5 to 80 m / sec for the air flow.

The material of the ejector such as the induction chamber and the nozzle part is as follows:
What is necessary is just to select suitably from ceramics, steel, titanium, a titanium alloy, etc. according to the kind of fluid. Since the solid particles P pass through the inner wall of the ejector, when metal beads or inorganic particles are used as the solid particles, the particles are hard, and therefore a ceramic having good wear resistance may be used. If the fluid is a liquid, select a material that does not cause rust, dissolution, corrosion, etc. For example, if the fluid is water, stainless steel, titanium, a titanium alloy, a synthetic resin, or ceramic is used. However, if the surface is waterproofed, steel or the like may be used.

The fluid F is used as a solid particle accelerating fluid when the solid particles P are accelerated and conveyed by the fluid flow, and the solid particles P are ejected together with the fluid F from the solid particle ejection means (eg, an ejection nozzle). . The fluid F is a solid particle acceleration fluid for accelerating the solid particles P. As the fluid, both gas and liquid can be used, but usually, gas which is easy to handle is used. The gas is typically air, but may be carbon dioxide, nitrogen or the like.

Although the liquid is not necessarily limited,
Water is one of the preferred materials because of its nonflammability, ease of drying, non-toxicity, low cost, and availability. In addition,
Nonflammable liquids such as Freon can also be used. A liquid (as well as a gas) can be impinged on the transfer sheet along with the solid particles. Naturally, liquid has a higher density than gas, so liquid is easier to accelerate when solid particles are accelerated by a fluid flow than gas, and when liquid collides with a transfer sheet, Even at speed collisions such as
The collision pressure is higher than that of a gas, and a more practical collision pressure can be obtained (and the solid particles can be easily transported because the density difference with the solid particles is small). Therefore, in the case of a liquid, the transfer pressure can be applied not only to the solid particles but also to the liquid collision pressure, so that a higher transfer pressure can be applied. A large one can be obtained due to the molding effect of following and molding.

When a fluid is used as the heating or cooling means when the collision pressure is applied, the liquid has a higher specific heat than the gas, so that a greater heating or cooling effect can be obtained. In addition, when the liquid is an electric conductor such as water, explosion-proof measures against electrostatic charging are easier than in the case of a gas.
Cosmetic materials obtained by the present invention include exterior materials such as exterior walls, fences, roofs, gates, gable boards, wall and ceiling interior materials, window frames, doors, handrails, thresholds, doors and other fittings, chests and the like. It can be used in various fields such as furniture surface materials, home electric appliances and OA equipment cabinets, and vehicle interior materials such as automobiles.

The surface of the decorative material after the transfer may be further coated with a transparent protective layer. As such a transparent protective layer, one or two or more of a fluororesin such as polytetrafluoroethylene and polyvinylidene fluoride, an acrylic resin such as polymethyl methacrylate, a silicone resin, and a urethane resin are used as a binder. As needed
Use paints with UV absorbers such as benzotriazole and ultrafine cerium oxide, light stabilizers such as hindered amine radical scavengers, lubricating agents such as silica and spherical α-alumina, coloring pigments, extender pigments, lubricants, etc. . Spray coating, flow coating, etc. are used for coating. The thickness of the transparent protective layer is about 1 to 100 μm.

[0061]

The present invention will be further described with reference to the following examples. The transfer sheet S, as the support sheet 1, is made of an olefin-based thermoplastic elastomer made of a mixture of 90% by weight of a hard segment made of isotactic polypropylene and 10% by weight of a soft segment made of active polypropylene, and erucamide. 10 lubricants
Using a composition having the main component added by 00 ppm formed into a sheet having a thickness of 100 μm and a width of 1000 mm by a T-die extrusion method, using a mixture of an acrylic resin and a urethane-based resin as a binder main component. A marble stone pattern layer and a colored solid layer were formed by gravure printing using an ink having pigments of titanium white, red iron oxide, phthalocyanine blue, isoindolinone red and carbon black.

As the transfer-receiving substrate B, a 15 mm-thick calcium silicate plate having an uneven shape is spray-melted with a urethane-based adhesive, and the transfer sheet S is heated to 100 ° C. to be softened. Using a transfer device as shown in FIG. 2, spherical zinc spheres having an average particle diameter of 0.3 mm as solid particles P are made to collide with the support sheet 1 side of the transfer sheet S at an average speed of 35 m / sec to reduce the transfer pressure. After pressing and cooling, transfer was performed by peeling the support sheet 1.

At this time, after the support sheet 1 is peeled off by the peeling roll 60 from the paper feeding section via the transfer section, the section from the peeling roll 60 to the pair of nip rolls 72, 72 has a relatively low tension. (Approximately 2 kg), the support sheet 1 is fed, and then the rotation is controlled to control the rotation from the nip rolls 72, 72 rotated faster than the peripheral speed of the peeling roll 60 and slower than the peripheral speed of the discharge roll 71. In the section up to 71, the support sheet 1 was fed with the tension increased (around 5 kg). Since the tension was raised and the film was wound, the transferred support sheet was not bulky and the winding workability was improved.

[0064]

According to the present invention, the transfer layer side of the transfer sheet including the support sheet and the transfer layer is opposed to the three-dimensional transfer substrate or the transfer substrate having a non-planar surface, The solid particles collide against the support sheet side of the transfer sheet, and the collision pressure is used to press the transfer sheet along the contour of the substrate to be transferred so that the transfer layer adheres to the substrate to be transferred. In the curved surface transfer method, the support sheet is peeled off after the transfer, in which the transfer layer is transferred to the substrate to be transferred by peeling the support sheet and winding the peeled support sheet by winding means. Can be wound at a high bulk density without being bulky, so that not only a decorative material having a large three-dimensional uneven surface decorated can be easily obtained, but also a waste of the paper discharge roll side can be eliminated, and Change the frequency of paper roll replacement Because it can decrease, it is possible to ensure a high working efficiency by improving the production efficiency.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram outlining a curved surface transfer method according to the present invention.

FIG. 2 is a conceptual diagram schematically illustrating an example of a transfer device for performing a curved surface transfer method according to the present invention.

FIG. 3 is a conceptual diagram outlining another example of the sheet winding means used in the curved surface transfer device according to the present invention.

FIG. 4 is an explanatory view showing an example of three-dimensional surface irregularities of a transfer-receiving substrate.

FIG. 5 is a conceptual view (front view) illustrating one embodiment of an ejector using an impeller.

FIG. 6 is a perspective view of an impeller part of FIG. 5;

FIG. 7 is a conceptual diagram illustrating the inside of the impeller of FIG. 5;

FIG. 8 is an explanatory diagram for adjusting the ejection direction with an impeller.

FIG. 9 is a conceptual diagram illustrating one embodiment of an ejector using an ejection nozzle.

FIG. 10 is a conceptual diagram outlining a conventionally known curved surface transfer method and a curved surface transfer apparatus using solid particles.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support sheet, 2 ... Transfer layer, 3 ... Ejector, 10 ... Substrate conveyance device (substrate conveyance means), 20 ... Sheet supply means,
Reference numeral 30: collision pressure application unit (collision pressure application unit), 31: hopper, 32: ejector (solid particle ejection unit), 33: chamber, 34: drain tube, 35: separation device, 36: vacuum pump, 60: peeling Roller (peeling means), 70: sheet winding means, 71: paper discharge roll, 72: nip roll, 8
12 impeller, 813 impeller, 816 directional controller, 8
40: ejector using blow nozzle, B: substrate to be transferred, D
... Cosmetic material, P ... Solid particles, S ... Transfer sheet

Claims (3)

[Claims] 1. A transfer sheet comprising a support sheet and a transfer layer, the transfer layer side of which is opposed to a three-dimensional transfer substrate or a transfer substrate having a non-planar surface. The solid particles collide against the sheet side, and the collision pressure is used to press the transfer sheet along the contour of the transfer target substrate so that the transfer layer adheres to the transfer target substrate. Then, by winding the peeled support sheet by winding means, the transfer layer is transferred to the substrate to be transferred, a curved surface transfer method, winding the support sheet after peeling, After passing through a predetermined area in a state of tension higher than the tension in the winding direction immediately after peeling of the support sheet,
A curved surface transfer method, wherein the winding is performed by winding means. 2. The curved surface transfer method according to claim 1, wherein the high tension is obtained by changing a running speed of the support sheet to a speed higher than before in the area. 3. The transfer layer side of a transfer sheet having a support sheet and a transfer layer is opposed to a three-dimensional transfer substrate or a transfer substrate having a non-planar surface, and the transfer sheet is supported. Curved surface transfer in which solid particles collide with the body sheet, and the collision pressure is used to press the transfer sheet along the contour of the substrate to be transferred so that the transfer layer is transferred to the substrate to be transferred. An apparatus comprising: at least a solid particle ejecting unit for ejecting solid particles; a substrate conveying unit for conveying a substrate to be transferred to a position facing the solid particle ejecting unit; and a solid particle ejecting a transfer sheet. A transfer sheet supply means positioned between the means and the substrate to be transferred; and, after the transfer layer is bonded to the substrate to be transferred, for peeling the support sheet from the substrate to be transferred and winding the peeled support sheet. Winding means, The wiping unit is configured to allow the tension in the winding direction of the support sheet to pass through the predetermined region in a state where the tension in the winding direction of the support sheet is higher than that immediately after the separation, between the peeling position and the winding position of the support sheet. A curved surface transfer device comprising a tension changing means.