JP2002172896A - Method for hydraulically transferring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an appearance of a steering wheel precisely simulate an appearance of a steering wheel made of a natural wood by a hydraulic transfer. SOLUTION: A method for hydraulically transferring the steering wheel comprises a front transfer step A, a masking step B, a front releasing step C, a pattern removing step D, a rear transfer step E and a rear releasing step F as a fundamental configuration. Thus, a pattern of the appearance of the steering wheel by the hydraulic transfer is precisely reproduced to the pattern of the appearance of the steering wheel using the natural wood.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of hydraulically transferring an object such as a steering wheel having a three-dimensional curved surface, and more particularly, to a method of hydraulically transferring a pattern very similar to the appearance of a natural wooden steering wheel. It is an effective technology.

[0002]

2. Description of the Related Art Printing on the surface of an object having a three-dimensional curved surface is performed by hydraulic transfer. Hydraulic transfer is a process in which a water-soluble film on which a pattern for transfer is printed is floated on the surface of the water, the transferred object is pressed against the pattern remaining on the surface of the water in a state where the film is melted, and immersed in water in that state, the transferred object Is a method in which a pattern is pressed against the surface of the surface of the object with water pressure to transfer the pattern neatly to the outer peripheral surface of the three-dimensional curved surface.

[0003] A wide variety of articles have conventionally been applied as a transfer object having a three-dimensional curved surface. The steering wheel is one of them. The steering wheel generally has a ring-shaped rim portion and a spoke portion provided inside the rim portion, and is connected to a steering shaft by a boss portion provided on the spoke portion.

The rim of such a steering wheel is
At present, most products are manufactured in a ring shape by resin molding, but before such resin molding became mainstream, two pieces of wood with a semicircular cross section formed in a ring shape were bonded together. It had been. Steering wheels made of wood are still popular today due to their beautiful natural grain. However, its production is troublesome and expensive.

Therefore, a technique has been developed to meet the demand by hydraulically transferring a woodgrain pattern to the three-dimensional curved surface of a resin-molded rim by hydraulic transfer.
As such a hydraulic transfer technology of a steering wheel,
For example, as shown in Japanese Patent Application Laid-Open No. 61-5981, a steering wheel is erected on a film surface floating on the water surface in accordance with a grain pattern of the film surface, and the erected steering wheel is rotated along the grain pattern. A technique for performing hydraulic transfer is disclosed.

According to this method, the state where the grain pattern has been transferred so as to flow in the cross-sectional direction of the steering wheel can be transferred so that the grain pattern flows along the steering wheel. You can now make it look more like a wheel.

Further, when the hydraulic pressure is transferred to the rim portion of the steering wheel, the transfer is performed so as to wrap the outer periphery of the rim portion, so that a seam is inevitably formed. Such a joint is
Since the wood grain pattern is inevitably cut off, it has been performed by those skilled in the art that the seam can be formed at a position invisible to the driver. JP-A-10-3294
No. 98 discloses that a transfer joint is hard to be seen by a driver by pressing a front surface of a steering wheel into a transfer direction in a state of being inclined in a transfer direction and pressing the transfer film floating on the water surface. There is disclosed a one-time transfer technique formed substantially on the back side of a steering wheel.

Further, Japanese Patent Application Laid-Open No. H11-321663 discloses a method of hydraulically transferring a steering wheel by using masking. In this publication, for example, after a part of the surface of a molding member constituting a part of a rim is masked by a first mask member, a transfer pattern is transferred to a non-masking part by hydraulic transfer, and then, the transfer pattern surface There is disclosed a technique in which a coating film is formed by PVA or the like, the first mask member is peeled off after the coating film is formed, and hydraulic transfer is performed on the peeled portion.

Further, Japanese Patent Application Laid-Open No. 11-321663 discloses that after the first mask member is masked in the same manner as described above, the transfer pattern is transferred to the non-masked portion by hydraulic transfer, and then the transfer pattern surface is transferred to the second mask member. Mask it. At the time of masking, 0.1 to 0.4 m from the edge of the transfer pattern
m, more preferably with an accuracy of 0.2 mm, the end of the second mask member is set inside, and in this state, the side without the second mask member is hydraulically transferred, whereby the above-mentioned 0.1 to A method of forming an overlapping portion of a transfer pattern within a range of 0.4 mm, more preferably 0.2 mm and performing hydraulic transfer is disclosed.

The above-mentioned Japanese Patent Application Laid-Open No. 11-321663 also discloses the following hydraulic transfer method. A mask member such as a masking tape is stuck on the side surface of the rim portion before the transfer in a band shape. In this state, the steering wheel is mounted on a horizontal rotating table, and is horizontally rotated with respect to the fixed blade, so that a cut is made in the mask member. One of the cut mask members is peeled off, the one that does not peel off the mask member is protected with a PVA coating, and the one that peels off the masking member is transferred.

After the transfer, PVA is applied to the transfer surface, and then the PVA coating film on the transfer surface is applied at 0.05 to 0.5 mm from the edge of the coating film.
In the range of 2mm, peel off together with the masking member,
There has been proposed a method of performing hydraulic transfer by forming an overlapping portion of a transfer pattern within a range of 0.05 to 0.2 mm by performing hydraulic transfer.

[0012]

When the demand for a steering wheel having a woodgrain pattern is examined in detail, there is a demand for a steering wheel that closely resembles an actual woody steering wheel. Relatively expensive models have well-grained wood-grained interiors, giving them a sense of luxury. The steering wheel is also required to have a high-grade specification in accordance with the interior. However, the reproducibility of the appearance pattern of the steering wheel of a natural wood is not good with the conventional hydraulic transfer method. In particular, the reproduction of the horizontal straight seam of the two bonded portions, which can be said to be a feature of the appearance of the steering wheel of the natural wood specification, was not good.

Conventionally, a large number of wood-grained steering wheels have been provided, but the reproducibility of the joints is not good, and a high-grade feeling cannot be produced.

As described above, several proposals have been made with respect to hydraulic transfer of a steering wheel. However, the reproducibility of a seam of a horizontal straight line can be improved by precisely resembling a steering wheel of a natural wood specification. There is not much technical development aimed at directing. A technique has been developed in which the masking member disclosed in Japanese Patent Application No. 11-321663 has a step of cutting the masking member with a horizontal rotating table, which is slightly conscious of this.

However, in such a method, as described above, the PVA is formed in a very small width of 0.05 to 0.2 mm on a horizontal rotating table.
A technique for inserting a separation line with high precision in order to remove a coating film is required. The periphery of the steering wheel is not perfectly circular and there is some distortion, and such peeling cannot be easily performed.

The inventor of the present invention has developed a hydraulic transfer technique that can closely resemble a wood-based steering wheel. We thought that it was necessary to develop a technology that could perform well.

An object of the present invention is to provide a hydraulic transfer technique capable of precisely reproducing the appearance of a natural wood steering wheel.

[0018]

According to the present invention, a rim of a steering wheel is pressed against a transfer film floating on a liquid surface from a plurality of directions so that the transfer surface of the rim is immersed below the liquid surface. This is a hydraulic transfer method of performing pressure transfer and joining transfer patterns from a plurality of directions at joints of desired positions, wherein the hydraulic transfer is performed from one side of the rim portion so as to exceed a desired position where the joints are formed. A pre-transfer step, a masking step of masking across the desired joint formation position, and a cut in the masking portion formed in the masking step along the desired joint formation position; In the peeling step of peeling off the masking in the direction different from the direction transferred in, the pattern removing step of removing the transfer pattern remaining on the peeling part side peeled in the pre-peeling step, and the peeling part side, A transfer step after the liquid pressure transfer so as to overlap the serial masking moiety, it has a peeling step after peeling the remaining masking portion and said.

The one-way side of the rim in the pre-transfer step is either the front side or the back side of the rim. The masking in the masking step crosses the desired joint formation position on the transfer part transferred in the pre-transfer step, and both the transfer part and the non-transfer part not transferred in the pre-transfer step It is characterized by masking to cover.

[0020] In the pre-transfer step, the rim front portion and the rim rear portion separated by the spoke portion of the steering wheel are hydraulically transferred back and forth. In the post-transfer step, the front part of the rim and the rear part of the rim divided by the spokes of the steering wheel are hydraulically transferred back and forth. The cuts made along the desired formation position of the seam in the pre-peeling step are made so as to bisect the rim vertically in a horizontal straight line inside and outside the rim.

Further, according to the present invention, an object is pressed against a transfer film floating on a liquid surface from a plurality of directions, and the transfer surface of the object is immersed below the liquid surface to perform hydraulic pressure transfer to transfer the object from a plurality of directions. A hydraulic transfer method for aligning a pattern at a joint at a desired position, comprising: a pre-transfer step of performing hydraulic transfer from one side of the object so as to exceed a desired position at which the joint is formed; A masking step of masking over a desired position, and a cut is made in the masking portion formed in the masking step along a desired position for forming the seam, and a cut in a direction different from the direction transferred in the pre-transfer step. A pre-peeling step of peeling off the masking part, a pattern removing step of removing a transfer pattern remaining on the peeling part side peeled off in the pre-peeling step, and a liquid so that the peeling part side overlaps the masking part. A transfer step after transferring, the liquid pressure transfer method and having a after peeling step of peeling off the remaining masking moiety, an object having a three-dimensional curved surface other than the steering wheel, rather than in a single transfer,
This is an effective technique that is applied to forming a transfer portion at a beautiful joint by performing hydraulic transfer a plurality of times.

In the above-described hydraulic transfer method for the object or the steering wheel having any one of the configurations of the present invention, the transfer portion transferred in the pre-transfer step includes a transfer portion in the pattern removing step. The transfer portion not to be removed is characterized in that the entire portion is masked before the post-transfer.

The non-transferred desired portion different from the masked portion is hydraulically transferred in a masked state. The masking of the non-transferred desired portion is often performed by heating the heat-shrinkable film to shrink the heat-shrinkable film to mask the non-transferred desired portion. I do. The transfer pattern is characterized in that a pattern of small units such as a checkered pattern is formed continuously.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a front view of a steering wheel used in the present invention, and FIG. 1B is a side view.

The steering wheel 10 is shown in FIG.
As shown in FIG. 1, the rim 11 is formed in a ring shape, and the spokes 12 are provided in the ring of the rim 11. In the center position of the spoke part 12, FIG.
As shown in (B), a boss 13 is provided.

In this specification, in order to make the following description easy to understand, one side of the rim portion 11 divided by the spoke portion 12 shown in FIG.
And the other side is referred to as a rim rear portion 11b for the sake of explanation. In FIG. 1 (A), the rim front portion 11a and the rim rear portion 11b are shown by hatching.

As shown in the side view of FIG.
The side where the spoke portion 12 and the boss portion 13 do not protrude from the ring surface formed by the rim portion 11 of the steering wheel 10 will be referred to as a front surface 10a, and the side where the spoke portion 12 and the boss portion 13 protrude will be referred to as a back surface 10b. I will call it.

According to the present invention, the rim portion 11 of the rim portion 11 of the steering wheel 10 having such a configuration is provided on the three-dimensional outer peripheral curved surface.
In this method, the appearance printing with good reproducibility, similar to the case of using natural wood, is performed by hydraulic transfer.

As shown in FIG. 2, the hydraulic transfer method of the present invention comprises a pre-transfer step A, a masking step B, a pre-peel step C, a pattern removing step D, a post-transfer step E, and a post-peel step. And a step F as a basic step.

Hereinafter, the basic method of the present invention will be described in detail, and the hydraulic transfer method for a steering wheel according to the present invention will be described more specifically.

In the pre-transfer step, first, prior to performing the hydraulic transfer of the steering wheel 10, first, FIG.
As shown in (A), the transfer film 20 is floated on the water surface 21. The transfer film 20 is configured by printing a transfer pattern 23 on a surface of a water-soluble film 22 with printing ink. With the transfer pattern 23 facing upward, the water-soluble film 22 behind is floated on the water surface 21.

With the transfer film 20 floating, an adhesive is sprayed onto the transfer pattern 23 facing upward by a spraying means or the like to prepare the transfer pattern so that the transfer pattern can be transferred. An adhesive is sprayed on the transfer pattern 23, and the water-soluble film 22 behind the transfer pattern 23 is almost dissolved in water, so that the transfer pattern 23 is floating on the water.

At this point, as shown in FIG. 3B, the back surface 10b side of the steering wheel 10 is first hydraulically transferred. Prior to hydraulic transfer, Fig. 4 (A)
Is masked as a non-transfer desired portion to prevent the transfer pattern 23 from being transferred during hydraulic transfer.

The masking of the desired non-transferred portion (shaded in the figure) may be carried out by using a masking tape or the like as in the prior art. However, as shown in FIGS. The use of the masking method newly developed by the present inventor using the film 30 makes it possible to perform masking more simply, reliably and easily.

The present inventor considered that a conventional masking method in which a commercially available masking tape was cut into a predetermined length and the masking tapes were overlapped little by little to perform masking was extremely time-consuming. However, it has been noticed for the first time that the use of the heat-shrinkable film 30 can solve such a problem.

As shown in FIGS. 4 (B) and 4 (C), the heat-shrinkable film 30 is cut into an appropriate size, and the heat-shrinkable film 30 is used to form a desired non-transfer portion such as a spoke portion 12 or a boss portion 13. Wrap. As a way to wrap, for example,
What is necessary is just to wrap it in the way of wrapping food etc. in Clerap (registered trademark).

Thereafter, hot air is blown onto the heat-shrinkable film 30 surrounding the desired portion to be non-transferred with a drier or the like, or placed in a microwave oven, and the inside of the refrigerator is kept at a temperature at which the heat-shrinkable film 30 shrinks. The heat-shrinkable film 30 is shrunk by, for example, being placed in a dryer. The heat-shrinkable film 30 shrinks, makes close contact with the desired non-transfer portions such as the spoke portion 12 and the boss portion 13, and can perform the same or more reliable masking as when a masking tape is applied.

After masking with the heat shrinkable film 30,
To perform hydraulic transfer, but then to release the masking,
It is only necessary to make a cut or the like between the heat-shrinkable film 30 and the desired non-transferred portion and peel off the film, and the film can be easily peeled off. When masking, compared to using multiple masking tapes, there is no need to worry about the adhesive material being transferred to the product side, and there is no need to peel off each tape individually. Can be done.

The hydraulic transfer was performed with the desired non-transferred portion masked in advance. When transferring,
The hydraulic transfer of the rim front part 11a side and the rim rear part 11b side was performed separately. That is, hydraulic transfer was performed first from either one of the rim front portion 11a side and the rim rear portion 11b side, and then the other side was hydraulically transferred. In the following description, the case where the hydraulic transfer is performed on the rim front portion 11a side will be described first.

The liquid pressure transfer was performed by lowering the rim front portion 11a toward the transfer film 20 floating above the water surface 21, pressing the rim front portion 11a onto the transfer film 30 and further immersing it in water. .

The amount of immersion of the rim front portion 11a is shown in FIG.
As shown in a cross-sectional view of FIG. 5 (B) showing a state where the steering wheel 10 shown in FIG. 5A is cut along the line AA shown in FIG. 5 (A), the cross section of the rim front portion 11a is The transfer section 14 may be adjusted so that the transfer section 14 is located on the upper half X side of the half line a (indicated by a dashed line in the figure) which is exactly bisected to the half Y. Such a bisector a connects the rim portion 11 to the back surface 1.
The transfer pattern is obtained by hydraulic transfer from the 0b side and the front 10a side, respectively, and serves as a seam for joining the transfer patterns obtained by both hydraulic transfer.

The amount of immersion is not strict and may be roughly determined. In short, it is only necessary that the transfer unit 14 exceed a desired position where a joint such as the above-mentioned bisector is to be formed. Therefore, when it is difficult to perform the hydraulic transfer while leaving a part of the upper half portion X as the non-transfer portion 15 as shown in FIG. 6A, for example, the entire portion may be submerged. In such a case, although not shown, the transfer portion 14 is formed on the entire rim portion, but it does not matter. However, in such a case, only the pattern removal range in the pattern removal step described later is widened.

After performing the hydraulic transfer by immersing in the water as described above, the steering wheel 10 is pulled up from the water, and then the hydraulic transfer is performed in the same manner as the rim front portion 11a. Do. The transfer film 20 used in the hydraulic transfer of the rim rear portion 11b is a rim front portion 11a.
The transfer film 20 used in the hydraulic transfer may be used as it is, and the transfer may be performed in an area on the side opposite to the side used for the transfer of the rim front portion 11a.

Of course, after the hydraulic transfer of the rim front part 11a, another transfer film 20 may be prepared and the hydraulic transfer of the rim rear part 11b may be performed. It is more economical and time-consuming to perform the hydraulic transfer of each of the rim rear portion 11b and the rim rear portion 11b with a single transfer film 20 than when preparing separate transfer films 20 each time. It is advantageous.

FIG. 5C shows a state in which the hydraulic pressure is transferred to the rim rear portion 11b in this manner. In FIG. 5 (C),
Similar to FIG. 5 (B), this shows a situation where the rim rear portion 11b of the steering wheel 10 of FIG. 5 (A) is cut along the line BB.

In FIGS. 5B and 5C, the transfer unit 1
In order to easily understand the situation of No. 4, the thickness is exaggerated and displayed thicker than the actual cross section thickness of the rim portion 11.

Thus, in the pre-transfer step, the rim front portion 11a and the rim rear portion 1 of the steering wheel 10 are
1b, hydraulic transfer was performed from the back surface 10b side. In the above description, the case where the non-transferred desired portion including the spoke portion 12, the boss portion 13, and the spoke connection rim portion 11c is masked in advance is described. Therefore, the hydraulic transfer may be performed without performing the masking.

Further, the desired non-transferred portion is the spoke portion 12,
It is limited to the boss portion 13 and also to the spoke connection rim portion 11c.
When a transfer pattern similar to that of the rim front portion 11a and the rim rear portion 11b is required, the masking range of the heat shrinkable film 30 may be limited to the spoke portion 12 and the boss portion 13.

In the above description, the rim front portion 11a,
The case where the rim rear portion 11b is separated and the hydraulic transfer is performed has been described.
1a, when the same transfer pattern as that of the rim rear portion 11b is desired, when the hydraulic transfer is performed from the rim front portion 11a side to the spoke connection rim portion 11c side during the hydraulic pressure transfer from the rim rear portion 11b side, the hydraulic transfer is performed. What is necessary is just to adjust the amount of immersion in water so that it may be performed.

Further, when the transfer pattern is to be transferred to the spoke connection rim portion 11c as described above, the rim front portion 1
1a, the rim rear portion 11b is divided into two parts without performing hydraulic transfer.
The hydraulic transfer may be performed by being immersed in water once from the back surface 10a side of the steering wheel 10.

The method of performing hydraulic transfer separately to the rim front portion 11a and the rim rear portion 11b is different from the method of performing hydraulic transfer in a single operation, in that the liquid is transferred by the spoke portion 12 and the boss portion 13 projecting toward the back surface 10b. The transfer film is hardly pulled in during pressure transfer. Therefore, distortion of the transfer pattern of the rim front portion 11a and the rim rear portion 11b hardly occurs. Compared with the case of performing single transfer, distortion of the transfer pattern at the time of hydraulic transfer is small, and clear transfer can be expected.

That is, if the transfer is performed once from the back surface 10b side, the spoke portion 12 and the boss portion 13 are likely to come into contact with the surface of the transfer film 20 before the rim portion 11, and if they are immersed in water in this state. With the immersion of the spokes 12 and the bosses 13, the central portion of the transfer film 20 is recessed before the peripheral portion, which is the transfer area of the rim portion 11, so that the transfer pattern of the peripheral portion is drawn toward the center. Then, the pattern flows, and distortion occurs in the transfer pattern to be used for the transfer of the rim portion 11. In order to transfer a beautiful transfer pattern to the three-dimensional curved surface of the rim portion by hydraulic transfer without generating such distortion, the rim front portion 11a and the rim rear portion 11
It is preferable to perform hydraulic transfer separately for b.

Thereafter, the steering wheel 10 is pulled out of the water, and the rim front portion 11a and the rim rear portion 11b
Is transferred from the back surface 10b side by hydraulic pressure, and then washed by showering. The portion where the printed pattern is halfway adhered is washed away, leaving the portion where the hydraulic transfer is properly performed, and then dried to securely fix the hydraulic transfer portion.

After the completion of the pre-transfer step A, the process proceeds to the next masking step B. In the pre-transfer step A, FIGS. 6A and 6B
As shown in the figure, the masking tape M is rimped from below the bisector a of the transfer portion 14 of the rim front portion 11a to the non-transfer portion 15 of the upper half X, that is, so as to straddle the desired joint formation position. The inner peripheral surface 11si of the rim along the part 11;
It is stuck on the outer peripheral surface 11so of the rim. Similarly to the above, the rim rear portion 11b side also has an inner peripheral surface 11b as shown in FIG.
Attach masking tape M to si and outer peripheral surface 11so. The masking tape M needs to be stuck over the transfer line 14 and the non-transfer portion 15 over the bisector a.

As described above, the masking tape M is applied to the outer peripheral surface 11so and the inner peripheral surface 11si of the steering wheel 10.
After the masking step B is completed by applying the above, the process proceeds to the next pre-peeling step C.

The pre-peeling step C is a step of peeling a part of the masking tape M applied in the masking step B. Along the bisecting line a with a cutter so that the masking tape M attached to the inner peripheral surface 11si and the outer peripheral surface 11so of the rim front portion 11a and the rim rear portion 11b can be peeled along the bisecting line a along the bisecting line a. To make a notch CL.

FIG. 7 (A) shows such a state taking the rim front part 11a as an example. Similarly, a cut CL is made along the bisecting line a at the rim rear portion 11b by a cutter. After making the cuts CL, the masking tape M on the upper half part X side is peeled off as shown in FIG. 7B.

The present inventor has invented a novel cutting method in order to cut the cuts CL along the bisector a with high accuracy. That is, for example, the steering wheel 10 after the masking step B is laid flat on a surface such as a surface plate having a good flatness, and a cutter blade is provided at a height corresponding to a bisector a from the surface of the surface plate. The cutter is moved on the surface of the platen along the rim portion 11 while the blade of the masking tape is pressed on the bisector a of the masking tape M, and the cutter is cut along the bisector a in a clean and straight line with high precision.
Can be included.

Of course, other methods may be used as long as the cuts CL can be cut on the bisector a in a clean horizontal straight line.

After the pre-peeling step C is completed in the manner described above, the process proceeds to the next step of pattern removal step D. Pattern removal process D
7B is a step of removing the transfer portion 14 remaining on the upper half portion X after the masking tape M applied to the upper half portion X is peeled off as shown in FIG. 7B.

The transfer portion 14 can be removed by using an organic solvent such as alcohol such as methanol or ethanol which dissolves the printing pattern printing ink. FIG. 8A shows a state in which the transfer section 14 on the upper half X side has been removed. FIG.
In the case shown in (A), the rim front portion 11a is shown as an example, but the rim rear portion 11b also removes the transfer pattern remaining in the upper half portion X in the same manner as described above. .

The removal of the pattern may be performed, for example, by immersing the alcohol in a cloth and wiping it off. However, a slight wiping may be performed on the upper half X side of the edge of the masking tape along the bisecting line a. You may leave it. This is because such a portion overlaps with a transfer portion in a post-transfer process E described later and can be made inconspicuous.

In the above description, as shown in FIGS. 5 to 7, it is assumed that the transfer in the pre-transfer step A is more than half of the rim portion 11, that is, the transfer is performed slightly above the bisector a. Although shown, even when the entire rim portion 11 is transferred so as not to leave the non-transfer portion 15 in the pre-transfer step A, the transfer portion 14 formed over the entire upper half portion 15 may be removed.

After the pattern removing step D is completed in this way, the outer peripheral surface 11so and the inner peripheral surface 11si on the upper half portion X side of the rim front portion 11a and the rim rear portion 11b are returned to the further state. ing. On the other hand, the lower half Y has an outer peripheral surface 11so,
A transfer unit 14 is provided on the inner peripheral surface 11si by hydraulic transfer, and a masking tape M is attached so as to cover the transfer unit 14 along the bisecting line a in a band shape.

That is, after the completion of the pattern removing step D, the upper half X of the front side 10a of the steering wheel 10 from the bisecting line a remains untransferred.

After the pattern removing step D is completed in the manner described above, the process proceeds to the post-transfer step E of the next step, in which the hydraulic transfer is performed to the untransferred portion 15 of the steering wheel 10. Post-transfer step E
Then, similarly to the pre-transfer step A, the transfer film 20 is floated on the water surface 21 as shown in FIG. The transfer film 20 and the method of supplying the transfer film 20 may be performed in the same manner as described in the pre-transfer step A.

That is, as shown in FIG. 9 (B), the steering wheel 10 is lowered from the front surface 10a where the untransferred portion 15 remains toward the transfer film 20 floating and prepared on the water surface 21. It is pressed against the transfer film 20 and immersed in the water, and the untransferred portion 15 on the front surface 10a side is pressed.
Is subjected to hydraulic transfer.

The degree of immersion is determined by the lower half Y shown in FIG.
The transfer pattern may be set within the range of the masking tape M affixed. In the case shown in FIG.
The masking tape M masks the transfer portion 14 in a ring shape along the bisecting line a. However, when it is difficult to transfer the post-transfer portion within the width of the masking tape M, for example, FIG. As shown in (B), the entire transfer section 14 may be masked. In the case shown in FIG. 9B, the case where the entire transfer portion 14 is masked by the mask member M1 is shown.

In the case shown in FIG. 8B, the transfer portion 14 not masked by the masking tape M is completely masked with a mask member M1 such as another masking tape, that is, the entire transfer portion 14 is masked. Is shown.
If the entire transfer section 14 is masked in this way, there is no fear that the pre-transfer section and the post-transfer section overlap even if the transfer section 14 is immersed beyond the range of the masking tape M.

The masking of the entire transfer portion 14 may be performed after the pre-peeling step C, in which the masking tape M is peeled off, as described above, or in the masking step B, the lower half of the rim portion 11 may be prepared in advance. The entire portion Y may be masked so as to be covered with a mask member M2 such as a masking tape.

In the case of such a mask, for example, FIG.
As shown in (A), the lower half Y side is masked so as to also straddle the non-transfer portion 15 side of the upper half X side, and then a peeling step D
Then, a cut line CL is cut along the bisecting line a in the manner described above, and as shown in FIG.
2 is peeled off. After the peeling, the transfer pattern on the upper half portion X side may be removed in the manner described above, and the process may proceed to the post-transfer step E.

The mask for the entire lower half portion Y may be formed as described above, but the point is that the post-transfer should not be overlapped with the transfer section 14 in the pre-transfer step. It is only necessary that such a mask be completed before the post-transfer.

The front 1 of the steering wheel 10
When the 0a side is pressed against the transfer pattern 23 on the water surface 21 side, it is not necessary to press the front surface 10a and the transfer pattern 23 surface in a strictly parallel state. For example, the rim front half 11a side and the rim rear half 11b It is also possible to immerse separately from the sides separately, with a necessary inclination.

FIG. 10 schematically shows the state of the liquid pressure transfer to the untransferred portion 15 in this manner. In FIG. 10, the transfer portion subjected to the hydraulic transfer in the post-transfer step E is 16
Displayed with.

After performing the hydraulic transfer by immersing in the water as described above, the steering wheel 10 is pulled out of the water, washed with a shower, and the portion where the printed pattern is partially adhered is washed away. , Leaving the part where the liquid pressure transfer is properly performed. Thereafter, the liquid transfer portion is securely fixed by drying.

After the completion of the post-transfer step E in the manner described above, the process proceeds to the peeling step F after the next step. The post-peeling step F is a step of peeling the masking tape M remaining in the lower half Y of the rim front part 11a and the rim rear part 11b. In a state where the masking tape M is peeled off, as shown in FIG. 11, the transfer portions 15 and 16 are connected in a horizontal straight line along the bisecting line a. That is, the transfer unit 15 and the transfer unit 16
The seam SL is formed in a horizontal straight line along the bisecting line a, and the transfer portions 15 and 16 are extremely finely joined. A seam almost similar to the seam seen in the steering wheel of the natural wood is provided. Is formed.

In FIG. 10, the transfer portions 14 and 16 and the masking tape M are exaggerated in thickness so that the situation can be easily understood, but the masking tape M should be as thin as possible. As a result, the finish after the post-peeling step F can be made beautiful.

If a woodgrain pattern is selected as the transfer pattern,
The upper half portion X and the lower half portion Y of the rim portion 11 are joined together at a seam SL formed in a straight line at a position corresponding to a right half of the rim portion. Is very similar in appearance to a steering wheel in which the rim 11 is formed using natural wood. A steering wheel precisely imitating a high-quality natural wood steering wheel can be manufactured at low cost by the above-described hydraulic transfer method of the present invention.

As described above, according to the present invention, the appearance pattern of the steering wheel in which the rim portion is formed of natural wood cannot be imitated with high reproducibility, and the sense of quality of natural wood cannot be produced. The hydraulic transfer steering wheel was able to reproduce the appearance and shape of the steering wheel very precisely, just like a real natural wooden steering wheel.

Further, conventionally, in a hydraulic transfer of a steering wheel, when a carbon pattern, a checkered pattern, a geometric pattern, or the like is transferred, a portion transferred so as to wind from the inner diameter side of the rim portion and a portion of the rim portion are transferred. At the seam where it is wrapped around the outer diameter side, the size of the handle at the transfer part from both the inner diameter side and the outer diameter side will be different, and the mismatch of the seam will be conspicuous Was a problem.

The degree of the difference in the size of the handle between the inner diameter side and the outer diameter side differs depending on the incident angle of the rim portion of the steering wheel with respect to the transfer pattern in the hydraulic transfer.
In the hydraulic transfer of the steering wheel, the pattern is pulled and stretched closer to the peripheral area of the rim, so taking that into account, the fan surface with its curvature adjusted to the front part of the rim or the rear part of the rim By printing on the transfer film in the shape and changing the pattern density etc. of the pattern in the fan shape from the center position side of the fan shape toward the peripheral position, it is possible to perform hydraulic pressure transfer with extremely suppressed pattern elongation It was confirmed that.

For example, in the case of a burl pattern, the pattern may be printed so that the pattern density gradually increases from the inner side to the outer peripheral position of the fan shape. Also, in the carbon pattern, at the position where the concentric circle from the center position corresponding to the pivot of the fan shape and the radiation emitted at equal intervals intersect, the pattern becomes larger as the radius of the concentric circle increases. Should be printed. In such printing, the pattern density on the circumference is the same even on different circumferences, and the spacing between adjacent patterns becomes smaller on a circumference with a larger circumference radius, as described in the present embodiment. In the case where the hydraulic pressure is transferred to the rim portion of the steering wheel, the mismatch based on the pattern elongation at the joint of the transfer pattern can be more effectively made inconspicuous.

In the above description of the carbon pattern, the terms concentric circumference and radiation are used to make it easy to understand the positional relationship of the pattern. However, such concentric circumference and radiation are imaginary lines for explanation only. It is not a part of the pattern printed on the printing surface. Of course, the circumference and the radiation may be printed as a part of the pattern.

As shown in FIG. 12, the fan-shaped printing may be performed on a rectangular transfer film or on a roll film at a predetermined interval.
What is necessary is just to match the curvature of the rim part of a steering wheel. As the transfer pattern provided in the fan-shaped portion, other than the bar-based or carbon-based pattern as described above, for example,
A pattern provided with a plurality of concentric arcs having the same curvature as the fan shape may be used. A printed pattern such as a so-called hair line in which a number of fine lines are provided on the rim portion of the steering wheel in parallel with the curvature or a large number of fine lines at minute line intervals can be provided. Even if hydraulic pressure transfer is performed to the rim of a steering wheel having curvature while printing a few parallel straight lines, the transfer pattern does not become parallel straight lines along the rim, It is possible to print a parallel line such as a hairline along the part.

Further, the film itself may be cut into a fan shape according to the fan shape. In such a case, so that the pattern does not disperse with the dissolution of the water-soluble film of the fan-shaped transfer film, by forming a frame according to the fan-shaped shape,
Hydraulic transfer may be performed using this frame member. Various materials can be used for the frame member.For example, when the spoke portion of the steering wheel and the boss portion abut on the frame portion when floating on water and transferring, and are pressed by the abutment to be immersed, and It may be formed of a material such as a resin material having an appropriate buoyancy so that the steering wheel can float as the steering wheel is pulled up from the water.

As the hydraulic transfer apparatus used in the hydraulic transfer method of the present invention having the above-described structure, a conventional hydraulic transfer apparatus can be used as it is. For example, the following hydraulic transfer apparatus can be used. An apparatus may be used.

The water is configured to flow from the upstream to the downstream in the water tank, and the transfer film is supplied and floated on the flowing water surface. For the supply of the transfer film, the transfer film wound in a roll shape is continuously supplied onto the flowing water surface, and the partition member is appropriately placed back and forth so as to have a predetermined length. The steering wheel is pressed onto the transfer film surface divided into front and rear sections by the partition member, and is immersed in water as it is, and then pulled up from the water to perform hydraulic transfer. The above-mentioned submersion of the steering wheel and the raising of the steering wheel from the water are performed by holding the steering wheel by a jig that automatically lowers and raises the steering wheel.

The transfer pattern remaining after the hydraulic transfer flows to the overflow portion on the downstream side, is trapped, and only the water from which the ink pattern has been removed is circulated again to the upstream side.

The transfer film may not be continuously supplied as described above, but may be a sheet-like transfer film cut to a predetermined size. Further, even if the transfer film is not supplied on the flowing water surface, for example, it may be supplied on the still water surface.

The present invention is not limited to the above-described embodiment, and may be changed as needed without departing from the gist thereof.

For example, in the above description, the case where a cut is made in a horizontal straight line along the bisector a in the pre-peeling step has been described. It doesn't matter if you try to put in.

In the above description, the position of the bisector a is
In order to make it look like a natural wood steering wheel, we cut a cut along the bisector set to halfway,
It does not matter if it is shifted toward the upper half or the lower half.

In the above description, the case where the transfer was performed from the back side in the pre-transfer step and the case where the transfer was performed from the front side in the post-transfer step was described, but from the front side in the pre-transfer step and from the back side in the post-transfer step. It does not matter if transfer is performed.

As described above, the present invention is a method suitable for performing hydraulic pressure transfer very similar to a steering wheel of a natural wood, however, in addition to a woodgrain, a checkerboard pattern,
Of course, other patterns such as carbon tone and stone tone can be applied.

Further, the upper half and the lower half can have completely different patterns.

In the above description, the structure of the transfer film is a structure in which a transfer pattern is printed on a water-soluble film. However, the structure of the transfer film is not limited to this structure, and other structures may be used.

Further, in the above description, transfer to the steering wheel has been described. However, in the hydraulic transfer method of the present invention, desired transfer cannot be sufficiently performed by one hydraulic transfer.
In the case of performing the hydraulic transfer a plurality of times, the method can be applied as a method for performing the joint of the plurality of transfer portions neatly. The seam can be formed neatly in a straight line.
In addition to the steering wheel, for example, interior goods of vehicles such as automobiles, furniture, mobile phones, accessories, accessories, etc.
This method is generally applicable to a plurality of times of hydraulic transfer onto the surface of an object having a so-called three-dimensional curved surface.

In the above description, although a substantially ring-shaped steering wheel is taken as an example, the case where the fan-shaped printing is performed on the transfer film has been described, but other shapes may be used. For example, when performing precise hydraulic transfer on the surface of a three-dimensional object imitating a flower such as an artificial flower, it is possible to change the printing shape to various shapes and sizes such as making the flower open. Needless to say. When the pattern of the animal's body surface is precisely reproduced on the surface of a three-dimensional object imitating an animal, the shape conforms to the developed shape of the animal's body surface like a rug formed by peeling the animal's fur Is also conceivable.

[0099]

According to the present invention, it is possible to perform hydraulic pressure transfer of a steering wheel that more closely resembles the appearance of a natural wood steering wheel than before. In particular, the reproduction of the joint can be made elaborate unlike the conventional case.

According to the present invention, masking can be performed using a heat-shrinkable film.
Alternatively, the trouble of unmasking can be saved. Further, there is no possibility of transferring the adhesive of the masking tape to the steering wheel side.

[Brief description of the drawings]

FIG. 1A is a front view of a steering wheel, and FIG. 1B is a side view thereof.

FIG. 2 is a flowchart showing a flow of a manufacturing process according to one embodiment of the present invention.

FIG. 3A is an explanatory view showing a state in which a transfer film is floated on a water surface in a pre-transfer step, and FIG.
FIG. 4 is an explanatory diagram showing a situation in which the steering wheel is hydraulically transferred from the back side.

FIG. 4A is a plan view of a steering wheel showing a desired non-transferred portion, and FIGS. 4B and 4C are explanatory diagrams showing a procedure for masking using a heat-shrinkable film.

FIG. 5A is a plan view of a steering wheel, and FIG. 5B is a rim front portion 1 taken along line AA of FIG.
It is sectional drawing of 1a, (C) is sectional drawing of the rim back part 11b cut | disconnected by the BB line of (A).

6A is a cross-sectional view showing a state of a front portion of a rim in a masking step, FIG. 6B is a partial perspective view showing the state, and FIG. 6C is a cross-sectional view of a rear portion of the rim.

FIG. 7A is a cross-sectional view showing a state in which a masking tape at a front portion of a rim is cut in a pre-peeling step, and FIG. 7B is a view in which an upper half-side masking tape is peeled off in a pre-peeling step; It is sectional drawing which shows a situation.

8A is a cross-sectional view showing a state of a front portion of a rim after completion of a pattern removing step, and FIGS. 8B and 8C are views showing a modification in which the entire transfer section is masked in a pre-transfer step. It is sectional drawing which shows the state after completion of a pattern removal process.

9A is an explanatory view showing a state in which a transfer film is floated on a water surface in a post-transfer step, and FIG. 9B is an explanatory view showing a state in which a steering wheel is hydraulically transferred from the front side.

FIG. 10 is a cross-sectional view showing a state of a front portion of a rim in a post-transfer process.

FIG. 11 is a cross-sectional view showing a state of a rim front portion in a post-peeling step.

FIG. 12 is a plan view showing a transfer film provided with a fan-shaped pattern.

[Explanation of symbols]

 Reference Signs List 10 Steering wheel 10a Front surface 10b Back surface 11 Rim portion 11a Rim front portion 11b Rim rear portion 11c Spoke connection rim portion 11si Inner peripheral surface 11so Outer peripheral surface 12 Spoke portion 13 Boss 14 Transfer portion 15 Non-transfer portion 16 Transfer portion 20 Transfer film 21 Water surface 22 Water-soluble film 23 Transfer pattern A Pre-transfer step B Masking step C Pre-peeling step D Pattern removing step E Post-transfer step F Post-peeling step a Bisection CL Cut M Masking tape M1 Masking member M2 Masking member SL Joint X Upper half Part Y Lower half

Claims (11)

[Claims] 1. An object is pressed against a transfer film floating on a liquid surface from a plurality of directions to immerse the transfer surface of the object below the liquid surface and hydraulically transfer the object, thereby transferring a transfer pattern from a plurality of directions to a desired position. A pre-transfer step of performing hydraulic transfer from one side of the object so as to exceed a desired position of the seam so as to exceed a desired position of the seam; A masking step of masking in the masking step; making a cut in a masking part formed in the masking step along a desired position of the seam; and peeling off a masking part in a direction different from the direction transferred in the pre-transfer step. A pre-peeling step; a pattern removing step of removing a transfer pattern remaining on the peeling part side peeled in the pre-peeling step; and after the hydraulic transfer so that the peeling part side overlaps the masking part. Liquid pressure transfer method and having a shooting step, a peeling step after peeling the remaining masking moiety. 2. A rim portion of a steering wheel is pressed against a transfer film floating on a liquid surface from a plurality of directions, and the transfer surface of the rim portion is immersed below the liquid surface to perform hydraulic pressure transfer. A hydraulic transfer method for aligning a transfer pattern at a joint at a desired position, comprising: a pre-transfer step of performing hydraulic transfer from one side of the rim so as to exceed a desired position at which the joint is formed; A masking step of masking over the desired formation position, and a cut in the masking portion formed in the masking step along the desired formation position of the seam, and a different direction from the direction transferred in the pre-transfer step. A peeling step of removing the masking on the side, a pattern removing step of removing a transfer pattern remaining on the peeling section side peeled in the pre-stripping step, Liquid pressure transfer method characterized by comprising a transfer step after the liquid pressure transferred so that, the peeling step after peeling the remaining masking moiety. 3. The hydraulic transfer method according to claim 2, wherein the one side of the rim in the pre-transfer step is one of a front side and a back side of the rim. Hydraulic transfer method. 4. The hydraulic transfer method according to claim 2, wherein the masking in the masking step is performed by straddling a desired formation position of the seam on the transfer part transferred in the pre-transfer step. And a non-transfer portion that has not been transferred in the pre-transfer step. 5. The hydraulic transfer method according to claim 2, wherein in the pre-transfer step, a rim front portion and a rim rear portion separated by a spoke portion of the steering wheel are formed. A hydraulic transfer method characterized by performing hydraulic transfer before and after. 6. The hydraulic transfer method according to claim 2, wherein in the post-transfer step, a rim front portion and a rim rear portion separated by a spoke portion of the steering wheel are formed. A hydraulic transfer method characterized by performing hydraulic transfer before and after. 7. The hydraulic transfer method according to claim 2, wherein the cut formed along the desired forming position of the seam in the pre-peeling step includes an inner side of a rim and a rim. A hydraulic transfer method characterized in that the rim portion is inserted into the outer side so as to bisect the rim portion with a horizontal straight line in the vertical direction. 8. The hydraulic transfer method according to claim 2, wherein, of the transfer portions transferred in the pre-transfer process, transfer portions that are not to be removed in the pattern removing process are: , The whole
A hydraulic transfer method, wherein the mask is masked before the post-transfer. 9. The hydraulic transfer method according to claim 1, wherein a non-transferring desired portion other than the masking portion is hydraulically transferred in a masked state. Hydraulic transfer method. 10. The hydraulic transfer method according to claim 9, wherein the masking of the non-transferred desired portion covers the non-transferred desired portion with a heat shrinkable film, and heats the heat shrinkable film to form the heat shrinkable film. Wherein the non-transferred desired portion is masked by reducing the pressure. 11. The hydraulic transfer method according to claim 1, wherein the transfer pattern is a pattern in which small unit patterns such as a checkered pattern are continuously formed. Characteristic hydraulic transfer method.