JP7560118B2 - Craft parts and their manufacturing method - Google Patents

Description

The present invention relates to craft parts such as accessory parts and methods for producing them.

Some accessories, such as necklaces, earrings, key holders, and pendants, are molded using a molding die with a photocurable resin such as ultraviolet-curable resin (UV resin) or a two-part epoxy resin that is cured by chemical reaction as the molding material. Patent Document 1 describes a molding die in which multiple molding recesses corresponding to the shape of the accessory are formed. After filling the molding recesses with photocurable resin as the molding material, which is the curable resin, the filled molding material is irradiated with ultraviolet light or other light to cure the molding material, and the accessory parts, such as pendants, brooches, necklaces, and buttons, made of resin in a shape that corresponds to the molding recesses, can be easily handmade.

Resin parts made from photocurable resin include accessory parts, name tag covers, plastic model parts, mobile parts, etc., and these handmade parts are collectively known as craft parts.

JP 2019-188113 A

In addition to using the molds described above to manufacture resin craft parts made from a curable resin such as photocurable resin, there is also a method for manufacturing necklaces and the like by applying the curable resin to a sheet material. In this case, the sheet on which the curable resin is applied has a peelable surface layer. The resin part made from the curable resin is peeled off from the sheet after hardening, and the front and back are painted to produce a product.

If it were possible to paint not only hand-drawn designs on resin parts, but also landscapes and animal pictures printed on them, the decorativeness and design value of craft parts made from resin could be increased.

The object of the present invention is to obtain craft parts that are made up of printed patterns and resin parts, and that can enhance the design.

The method for producing craft parts of the present invention includes the steps of printing a pattern on the ink receiving layer of a resin transfer sheet having a base layer and an ink receiving layer laminated on the base layer, applying a curable resin with a flowability in the area of the pattern to form a main resin part having the ink receiving layer attached to its back surface, curing the main resin part, and peeling the main resin part having the ink receiving layer with the printed pattern attached to its back surface from the base layer of the resin transfer sheet, thereby producing a craft part consisting of the resin part formed by the main resin part.

The method for producing craft parts of the present invention includes the steps of printing a pattern on the ink receiving layer of a resin transfer sheet having a base layer and an ink receiving layer laminated on the base layer, filling a molding recess provided in a molding die with a fluid curable resin, attaching the resin transfer sheet to the back surface of the curable resin filled in the molding recess so as to form a main resin part with the ink receiving layer attached, curing the main resin part, and peeling off the base layer of the resin transfer sheet from the main resin part with the ink receiving layer attached to the back surface in the area where the pattern is printed, thereby producing a craft part consisting of a resin part formed by the main resin part.

The craft part of the present invention comprises a resin part having an ink receiving layer on which a pattern is drawn, and a main resin part formed from a curable resin, with the area of the pattern of the ink receiving layer attached to the back surface and cured.

The craft part of the present invention comprises a resin part having an ink receiving layer on which a pattern is drawn, and a main resin part having a molding surface on its surface, formed from a curable resin, and having the ink receiving layer attached to its back surface and cured.

The craft part has a main resin part formed from a curable resin, and a pattern printed on the ink receiving layer of a resin transfer sheet and attached to the back of the main resin part. When the pattern area of the ink receiving layer on which the pattern is printed is brought into contact before the curable resin that forms the main resin part is cured, the pattern area is adhered to the back of the main resin part. The main resin part is then cured to obtain a main resin part with the printed pattern transferred onto it. This can enhance the decorativeness and design value of the craft part, which is formed with a pattern of animals or the like drawn on the printed material.

By forming a secondary resin part on the back side of the main resin part using a curable resin, a craft part is obtained in which a pattern is sandwiched between the main resin part and the secondary resin part, thereby increasing the design value of the craft part.

These craft parts can be used to easily create accessories such as pendants and earrings, as well as other plastic model parts and ornaments. If a photocurable resin is used as the curable resin, production time can be shortened.

1 is a process diagram showing a method for producing craft parts according to one embodiment. Figure 2(A) is an oblique view showing a pattern printed on the ink receiving layer of a resin transfer sheet having a base layer and an ink receiving layer, (B) is an enlarged cross-sectional view taken along line 1B-1B in (A), and (C) is an enlarged cross-sectional view taken along line 1C-1C in (A). 1 is an oblique view showing the state in which a fluid photocurable resin is applied to the pattern area to form a main resin part. FIG. FIG. 13 is a perspective view showing a state in which the main resin part is hardened by irradiating the main resin part with light. This is an oblique view showing the state in which the main resin part, having an ink-receiving layer with a printed area of a design attached to its back surface, is being peeled off from the base layer of the transfer sheet. This is an oblique view showing the state in which the main resin part peeled off from the base layer is turned over and a photocurable resin is applied to the ink receiving layer attached to the back surface to form a secondary resin part. FIG. 11 is a perspective view showing a state in which the secondary resin part is hardened by irradiating the secondary resin part with light. FIG. 2 is a front view showing a craft part formed by attaching an additional part to a resin part consisting of a main resin part and a sub resin part. 10A to 10C are process diagrams showing a method for producing craft parts according to another embodiment. 1 is a perspective view showing a pattern printed on the ink receiving layer of a resin transfer sheet having a base layer and an ink receiving layer. FIG. FIG. 2 is a perspective view showing a molding die provided with a plurality of molding recesses. 11A is a front view of FIG. 11, and FIG. 12B is a cross-sectional view taken along line 12B-12B in FIG. (A) is a cross-sectional view showing the state in which a molding recess has been filled with photocurable resin, (B) is a cross-sectional view showing the state in which the ink receiving layer of a resin transfer sheet is attached to the back surface of a main resin part made of filled photocurable resin, (C) is a cross-sectional view showing the state in which the main resin part is hardened by irradiating it with light, and (D) is a cross-sectional view showing the state in which the base layer of the resin transfer sheet is peeled off from the main resin part to which the pattern area of the ink receiving layer has been attached, each showing a portion of the 12B-12B cross section of the molding mold shown in Figure 12. 1 is a perspective view showing the rear surface of the main resin part with the pattern area of the ink receiving layer attached thereto after it has been removed from the mold. FIG. 1 is a perspective view showing a secondary resin part formed on the rear surface of the main resin part and cured. FIG. This is a front view showing a craft part in which an additional part is attached to a resin part consisting of a main resin part and a secondary resin part.

The following describes in detail an embodiment of the present invention with reference to the drawings. Figure 1 shows the steps of a method for producing craft parts, and Figure 1 shows a method for producing a pendant as an example of a craft part, where the pendant is produced through steps 1 to 7.

The printing process 1 shown in FIG. 1 is a process of printing a pattern 12 on a resin transfer sheet 11 as shown in FIG. 2(A). As shown in FIG. 2(B), the resin transfer sheet 11 includes a base layer 13 and a transparent ink receiving layer 14 laminated on the base layer 13, and a pattern area 15 is formed on the ink receiving layer 14 with the pattern 12 printed thereon by a printer such as an inkjet printer or a thermal transfer printer. The pattern 12 shown in FIG. 2 is an animated image of a cat, but the pattern can be any pattern that can be printed by a printer, such as an animal, a plant, a landscape, a human figure, or an animated character. The pattern 12 can be a color image or a monochrome image.

In the application process 2, a light-transmitting, fluid photocurable resin is applied to the pattern area 15. FIG. 3 shows the state where the flowing photocurable resin L is discharged from the container 16 and applied to the pattern area 15. The pattern area 15 is made up of the pattern 12 and its surrounding area, and shows the main resin part 21 to be manufactured as a pendant. FIG. 3 shows the state where the photocurable resin L is applied to the pattern area 15 to form the main resin part 21. Since the main resin part 21 is formed from a light-transmitting photocurable resin, the pattern 12 attached to the back surface of the main resin part 21 can be seen from the front surface of the main resin part 21. If the pattern 12 has enough light transmittance to be visible from the front surface, a colored photocurable resin can also be used.

Photocurable resin is a resin that polymerizes and hardens when exposed to light of a specific wavelength, and ultraviolet-curable resin, or UV resin, can be used as the photocurable resin. Examples of UV resin that can be used include urethane acrylate, acrylic resin acrylate, and epoxy acrylate, and UV resin is hardened by ultraviolet light with a wavelength of 365 nm. Examples of photocurable resin that can be used include LED resin that hardens with LED light with a wavelength of either 365 nm or 405 nm.

As a molding material for the main resin part 21, not only photocurable resin but also two-part epoxy resin can be used. Two-part epoxy resin is a resin that hardens through a chemical reaction when two parts, parts A and B, are mixed together. Whereas photocurable resin hardens in a short time, it hardens in 12 to 24 hours.

As in the illustrated embodiment, the main resin part 21 formed from photocurable resin is irradiated with light in the curing step 3 to be cured. Figure 4 shows the state in which light U is irradiated onto the main resin part 21. When UV resin is used as the photocurable resin, ultraviolet light is irradiated onto the main resin part 21. As a result, the main resin part 21 is cured in a short time at room temperature, and the pattern area 15 of the ink receiving layer 14 is attached to its back surface.

On the other hand, if a two-component epoxy resin is used as the curable resin, the main resin part 21 can be cured by leaving it for 12 hours or more. To produce resin parts in a short time, it is preferable to use a photocurable resin rather than a two-component epoxy resin.

Figure 5 shows the main resin part 21 after it has been peeled off from the resin transfer sheet 11 in the peeling step 4. The pattern area 15 is adhered to the back surface of the main resin part 21, and when the main resin part 21 is peeled off from the resin transfer sheet 11, it is peeled off from the base layer 13. Because the main resin part 21 is hardened, it can be easily peeled off from the resin transfer sheet 11 by folding the resin transfer sheet 11. The pattern area 15 is attached to the main resin part 21 by hardening the curable resin, whether it is a photocurable resin or a two-part epoxy resin.

The main resin part 21 with the pattern area 15 attached to its back surface is produced by the production method described in steps 1 to 4 of Figure 1, and the pattern 12 can be observed from both the front and back surfaces. The main resin part 21 can be used as a resin part to produce a craft part. This craft part is formed from the ink receiving layer 14 with the pattern drawn on it, and the main resin part 21, which is made of a photocurable resin and has an area of the ink receiving layer 14 attached to its back surface.

Figure 6 shows the main resin part 21 peeled off from the base layer 13 being turned over, and the image area 15 of the ink receiving layer 14 attached to the back surface of the main resin part 21 being coated with a light-transmitting, fluid photocurable resin L in coating step 5. By coating this photocurable resin L, a secondary resin part 22 is formed on the back surface of the main resin part 21 so as to cover the ink receiving layer 14.

The secondary resin part 22, which is formed of a photocurable resin like the main resin part 21, is irradiated with light in the curing step 6 and cured. FIG. 7 shows the state in which the secondary resin part 22 is irradiated with light U. When UV resin is used as the photocurable resin, ultraviolet light is irradiated onto the secondary resin part 22, and the secondary resin part 22 is cured at room temperature in a short time and becomes integrated with the main resin part 21 through the ink receiving layer 14 of the pattern area 15. As a result, the pattern area 15 of the main resin part 21 is covered with the secondary resin part 22, and the secondary resin part 22 is adhered to the main resin part 21. In this way, the resin part 20 is formed by the main resin part 21 and the secondary resin part 22, and it can be made into a craft part product. The photocurable resin constituting the secondary resin part 22 has light transparency, and as shown in FIG. 7, the pattern 12 can be visually observed from the outer surface of the secondary resin part 22. In FIG. 7, the pattern 12 observed from the outer surface of the secondary resin part 22 is the back side of the pattern 12 observed from the outer surface of the main resin part 21.

As described above, the secondary resin part 22 may also be formed by applying a two-component epoxy resin as a curable material so as to cover the ink receiving layer 14.

In this way, in order to make the resin part 20, in which the main resin part 21 and the sub resin part 22 are integrated, into a pendant, which is a craft part product, a hanging part 23 is attached to the resin part 20, as shown in FIG. 8, and a string member 24 for hanging is attached to the hanging part 23. The hanging part 23 can be attached to the resin part 20 by gluing a previously manufactured annular part with resin. In this way, the material of the hanging part 23 may be formed from a photocurable resin, or a hanging part previously manufactured from another material may be attached to the resin part 20. The hanging part 23 and the string member 24 each constitute an additional part for the resin part. In this way, the additional part is attached to the resin part 20 in the mounting process 7, and the production of the craft part as a pendant made of resin parts is completed.

As shown in FIG. 5, the main resin part 21 with the pattern area 15 attached to the back can be made into a product as described above. In this case, a hole can be made in the main resin part 21, and a hanging part 23 can be glued. This results in a craft part as a pendant made of the main resin part 21 with the pattern 12 transferred onto it.

Figures 2 to 8 show the production of a pendant, which is a craft part, but the craft parts made of a main resin part 21 with a pattern formed on the back, or made of a main resin part 21 and a secondary resin part 22, are not limited to this, and necklaces, earrings, pierced earrings, key holders, name tag faces, mobile parts, plastic model parts, etc. can be produced in a similar manner.

Figure 9 is a process diagram showing another embodiment of a method for producing craft parts, and in Figure 9, steps that are common to the steps shown in Figure 1 are given the same reference numerals. Figure 10 shows a state in which a pattern 12 has been printed on the ink receiving layer 14 of a resin transfer sheet 11 that has a base layer 13 and an ink receiving layer 14, similar to the resin transfer sheet 11 shown in Figure 2, in printing step 1 shown in Figure 9.

On the other hand, FIG. 11 is a perspective view showing a molding die 32 having multiple molding recesses 31, FIG. 12(A) is a front view of FIG. 11, and FIG. 12(B) is a cross-sectional view taken along line 12B-12B in FIG. 12(A).

To form the main resin part 21 using the molding recess 31 shown at the bottom right among the multiple molding recesses 31 shown in Figures 11 and 12 (A), in the filling step 2a, the molding recess 31 is filled with a light-transmitting, fluid photocurable resin. Figure 13 (A) shows the state in which the main resin part 21 is molded with the photocurable resin filled in the molding recess 31. The photocurable resin is filled by discharging the photocurable resin L from the container 16 and applying it to the molding recess 31, as in the case shown in Figure 3. The surface of the main resin part 21 is formed by the bottom surface 33 of the molding recess 31, and the back surface of the main resin part 21 is formed flat so as to be flush with the surface 34 of the mold 32.

Then, in the attachment step 2b, the resin transfer sheet 11, on which the image 12 has been printed on the ink receiving layer 14 in the printing step 1, is attached to the back surface of the flat main resin part 21. As shown in FIG. 13(B), the ink receiving layer 14, on which the image 12 has been printed in the printing step 1, is attached to the back surface of the main resin part 21, and the base material layer 13 is exposed to the outside. This attachment step 2b is carried out before the main resin part 21 hardens.

With the resin transfer sheet 11 attached to the back of the main resin part 21, as shown in Figure 13 (C), in curing step 3, the main resin part 21 is irradiated with light and the main resin part 21 is cured. When the main resin part 21 is cured, the pattern area 15 of the ink receiving layer 14 is adhered to the back of the main resin part 21. To achieve rapid curing, it is preferable that the base layer 13 is also optically transparent, and if the molding die 32 is made of a transparent material, the main resin part 21 can also be cured by irradiating it with light from below in Figure 13 (C).

After the main resin part 21 has hardened, the resin transfer sheet 11 is removed as shown in FIG. 13(D). When the resin transfer sheet 11 is thus removed from the surface 34 of the mold 32, a peeling process 4 is performed in which the main resin part 21 is peeled off from the base layer 13 of the resin transfer sheet 11. This leaves the picture area 15 attached to the back surface of the main resin part 21.

When the hardened main resin part 21 is removed from the mold 32, a main resin part 21 with a pattern 12 drawn on the back surface is produced, as shown in Figure 14. A molding surface corresponding to the shapes of the molding recess 31 and bottom surface 33 is formed on the surface of the main resin part 21. Figure 14 shows the back surface of the main resin part 21, and the pattern 12 in the pattern area 15 can be directly observed with the naked eye. As in the case described above, the main resin part 21 with the pattern area 15 attached to the back surface can be used as a resin part to produce a craft part.

On the other hand, as shown in FIG. 15, when the secondary resin part 22 is formed on the back surface of the main resin part 21, a resin part 20 comprising the main resin part 21 and the secondary resin part 22 is produced. The method of forming the secondary resin part 22 is similar to the method of producing the main resin part 21, in which the secondary resin part 22 is molded by filling the molding recess 31 of the molding die 32 with a light-transmitting, fluid photocurable resin L in the forming step 5a of FIG. 9. The secondary resin part 22 has a surface consisting of the molding surface formed by the molding die 32 and an attachment surface that is attached to the ink receiving layer 14 of the main resin part 21, and the attachment surface is the back surface of the secondary resin part 22.

Next, in the attachment process 5b, the back surface of the main resin part 21 is attached to the back surface of the secondary resin part 22, and then in the curing process 6, the secondary resin part 22 is irradiated with light to cure it. This allows the production of a resin part consisting of the main resin part 21 and the secondary resin part 22, each of which is made using the molding die 32.

Figure 16 is a front view showing a craft part in which a base 25 as an additional part is attached to the resin part 20 formed in this way. This craft part can be used as a decoration to be placed on a table, in other words, as an accessory. As shown in Figure 14, when manufacturing a craft part made of a main resin part 21 with a pattern 12 formed on the back, a base 25 is attached to the main resin part 21.

Even when the main resin part 21 and the sub-resin part 22 are formed using the mold 32, a two-component epoxy resin can be used as the curable resin.

The secondary resin part 22 may be produced by applying the photocurable resin L directly from the container 16 to the back of the main resin part 21 as shown in FIG. 6 without using the mold 32. In that case, a resin part 20 is obtained that is composed of the main resin part 21 produced using the mold 32 and the secondary resin part 22 produced without using a mold.

Craft parts that can be made using the molding method include necklaces, earrings, pierced earrings, key holders, name tag covers, mobile parts, plastic model parts, etc.

In this way, the main resin part 21 and the auxiliary resin part 22 can be formed by applying a hardening resin to the resin transfer sheet 11, or by filling the molding recess 31 of the mold 32 with hardening resin. In addition, one of the main resin part 21 and the auxiliary resin part 22 can be formed using the mold 32, and the other can be formed by applying the hardening resin to the resin transfer sheet 11.

The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, in the embodiment, an ultraviolet-curable resin is used as the curable resin, but it is not limited to a photocurable resin, and a two-part epoxy resin that cures by chemical reaction may also be used.

REFERENCE SIGNS LIST 11 Resin transfer sheet 12 Pattern 13 Base layer 14 Ink receiving layer 15 Pattern area 20 Resin part 21 Main resin part 22 Sub-resin part 23 Hanging part 24 String member 25 Base 31 Molding recess 32 Molding mold

Claims (7)

A step of printing a pattern on the ink receiving layer of a resin transfer sheet including a base layer and an ink receiving layer laminated on the base layer;
applying a fluid curable resin to a portion of the ink receiving layer including the image and a surrounding area;
curing the curable resin to form a main resin part over the area of the ink-receiving layer;
and a step of peeling off only the area of the ink receiving layer from the base material layer by peeling off the main resin part from the resin transfer sheet, thereby attaching the area to the back surface of the main resin part .
A method for producing a craft part, comprising producing a craft part from a resin part formed by the main resin part. The method for producing craft parts according to claim 1,
applying a fluid curable resin to the area of the ink receiving layer attached to the rear surface of the main resin part to form a secondary resin part attached to the rear surface of the main resin part through the area of the ink receiving layer;
and curing the curable resin to form the secondary resin part.
A method for producing a craft part, comprising producing a resin part formed by the main resin part and the sub resin part. A step of printing a pattern on the ink receiving layer of a resin transfer sheet including a base layer and an ink receiving layer laminated on the base layer;
A step of filling a molding recess provided in a molding die with a fluid hardening resin;
a step of adhering a part of the ink receiving layer including the pattern and a surrounding area to a back surface of the curable resin filled in the molding recess;
curing the curable resin to form a main resin part having adhered thereto the area of the ink receiving layer ;
and removing the resin transfer sheet from the main resin part to peel off only the area of the ink receiving layer from the base layer and attach the area to the back surface of the main resin part .
A method for producing a craft part, comprising producing a craft part from a resin part formed by the main resin part. The method for producing craft parts according to claim 3,
forming a secondary resin part made of a fluid curable resin and attached to the rear surface of the primary resin part via the region of the ink receiving layer ;
A method for producing a craft part, comprising producing a resin part formed by the main resin part and the sub resin part. The method for producing craft parts according to claim 4,
The step of forming the secondary resin part includes:
A step of filling a molding recess provided in a molding die with a fluid hardening resin;
a step of adhering the region of the ink receiving layer adhered to the rear surface of the main resin part to the rear surface of the curable resin filled in the molding recess;
and curing the curable resin . In the method for producing craft parts according to any one of claims 1 to 5,
A method for producing craft parts, comprising a step of attaching an add-on part to the resin part. In the method for producing craft parts according to any one of claims 1 to 6,
The method for producing craft parts, wherein the curable resin is a photocurable resin that hardens when irradiated with light.

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