JP4833772B2 - Decorative panel - Google Patents

Description

  The present invention relates to a decorative panel formed by transferring a printed pattern including characters and designs onto the surface of a plastic sheet.

  When forming decorative elements such as patterns and letters having clear irregularities on the surface of the resin molded product, conventionally, for example, by forming a concave structure on the surface of the resin molded product by a method such as so-called laser engraving. It was. In this method, there are restrictions on the materials used, the decoration part tends to become cloudy, there are also restrictions on the decoration expression, and it takes time, so it is not suitable for mass production and has a problem of high cost. In addition, it has been practiced to mold resin molded products using molds with sculptured surfaces to form the decorative elements as described above. Due to the above limitations, there is a problem that it is not suitable for small-scale production and the cost is high.

  On the other hand, for example, JP-A-6-72013 and JP-A-6-106840 disclose an invention relating to a three-dimensional pattern-formed molded article using a film with an uneven pattern. These inventions form a convex pattern for transfer with a transparent UV curable resin on the surface of the film and a printing ink layer for transfer applied to the convex pattern, and the layer on which the convex pattern printing ink is applied is formed into a cavity. The printed ink layer made of an ultraviolet curable resin is transferred to the surface of the plastic molded product by disposing the film having a convex pattern from the molded product.

  In each of the above inventions, for example, a convex pattern for transfer using a transparent ultraviolet curable resin and a printing ink layer for transfer applied to the convex pattern remain transferred after being transferred to the plastic molded product. Cannot be formed on the surface of the resin molded product as a clear concavo-convex structure. This is because these inventions aim to form a highly decorative pattern on a container of a cosmetic product such as a compact. Therefore, in order to form a clear concavo-convex structure on the surface of the resin molded product, it is necessary to provide only the concavo-convex structure for transfer on the surface contrary to the purpose of the above invention. Necessary items are not described because they are not related to the above invention.

JP-A-6-72013 JP-A-6-106840

  The present invention has been made paying attention to the above points, and the problem is clear by creating a decorative pattern on a printing substrate by printing, eliminating or reducing restrictions on decorative expression, It is to be able to provide decorative panels with high appeal. Another object of the present invention is to provide a decorative panel that does not take time to form a decorative element, is suitable for mass production, and can be set at a high and low cost.

The object of the present invention to solve the character formed by printing, a printing pattern including a pattern, in the decorative panel formed by transferring the surface of the plastic sheet, the surface of the printing substrate, the powder material A printing substrate that has a printing pattern consisting of ink irregularities , formed by printing with the added ink , is placed in a molding die to form a panel body made of plastic, and then the printing substrate is printed on the printing pattern. peeled from the panel body with, Ri consists recess formed by the transfer by the projections of the ink, the decorative elements that will be projected from the panel body front or rear surface comprises a panel body having a surface, the panel body panel a recess formed in the body surface, the collision rays, by scattering, the scattered light is guided to the main front or rear, the panel body front or To stand out the decorative element to the surface, is formed by a resin such as highly transparent acrylic, the end face of the panel body, the light introducing portion for introducing a light beam into the inner body is provided, further, the panel Means is taken to have a structure in which a transparent cover is coated on the surface opposite to the decorated surface of the main body .

  Since the decorative panel according to the present invention does not form a concave structure on the surface of the resin molded product by a technique such as laser engraving as in the prior art, it is not restricted by the material used, and the decorative part does not become cloudy. Since there are almost no restrictions on the decorative expression and it does not take time, it is suitable for mass production and the cost can be kept low. Also, the decorative panel according to the present invention is completely different from the method of forming a resin molded article using a conventional mold having a sculptured surface and forming the decorative element as described above, and the decorative element is printed by printing. Since it is formed, there are almost no restrictions on decorative expression, it is suitable for small-scale production, and the cost is not high.

The decorative panel to which the present invention is directed is a panel having a decorative property that is greater or smaller. The target decorative element is seen through from the front or back surface of the panel body by reflecting light , thereby improving the decorativeness. The panel in the present invention is an expression of an article form, and does not limit other matters. For large ones, for example, indoor or outdoor illuminated signage panels, indoor or outdoor indicator light panels, indoor or outdoor light guide plates, decorative panels used in game consoles and vending machines, and other electrical decorations It can be used as a panel. In addition, for small items, postcards and telegrams are also objects of the present invention.

  The decorative element in the decorative panel according to the present invention refers to a decoration including characters, designs, or decorative elements formed by printing on the surface of the panel body. However, even if it is not decorative, it can naturally be formed as a decorative element on the surface of the panel body by printing. When the decorative panel is composed of, for example, a decorative portion and a non-decorative portion, the decorative element in the present invention may be provided in either portion.

  In order to produce a decorative panel according to the present invention, it is most desirable to use an injection molding method. That is, it is performed by placing a printing substrate having ink irregularities with a printing pattern printed using ink on the surface in a molding die, filling the molding die with plastic, and injection-molding the panel body. . There are various types of molding methods that can be applied as described below. However, the injection molding method is best because it has good dimensional accuracy of the molded product, fine patterns by printing, and excellent pattern expression. It is. After the molding, the printing substrate is peeled off from the molded product together with the printing pattern, whereby irregularities transferred by the irregularities due to the ink are formed as decorative elements on the surface of the panel body made of a plastic sheet. In other words, the raised unevenness of the printing ink applied to the surface of the printing substrate is formed as unevenness of the decorative element on the surface of the panel body made of plastic. Since it is a pattern formed by printing, the usable range of characters, designs and the like that can be formed on the printing substrate is extremely wide and has a high degree of freedom.

  There are various printing methods to be applied to the surface of the printing substrate, and it can be considered that, as the amount of ink applied is larger, in general, a variety of expressions are possible, which is also suitable for the present invention. For example, screen printing is suitable as a printing method applied to the present invention because the amount of ink applied is large. Other applicable printing methods include offset printing, gravure printing, seal printing, and flexographic printing. Furthermore, any known printing method including stencil printing may be applicable for printing on the surface of the printing substrate in the present invention.

When the panel body made of plastic is molded, the printing ink is heated similarly to the printing substrate made of plastic, so the printing substrate and the panel body are bonded together, and the panel body, the printing substrate, and the printing pattern. It becomes difficult to separate. Therefore, in the present invention, it is desirable to apply a release material to the surface including irregularities due to the ink printed on the surface of the printing substrate. By applying the release material, the printing substrate and the printed pattern on the surface can be easily peeled off from the panel body, and irregularities with transferred irregularities can be formed on the panel body. Transparency can be maintained. Examples of release materials suitable for this application include silicon and stearate, and any of them can be used. In order to perform the peeling smoothly, it is preferable to perform the peeling before the temperature is lowered to room temperature or lower by natural cooling. Incidentally, irregularities are formed on the panel body is a one et concave portion is a transfer of the ink by the printed pattern, some of the recesses also protrusions, a mixture of irregularities. Moreover, the unevenness | corrugation formed in the panel main body by mold forming is also included.

  As a form usable as a printing substrate, a sheet-like or film-like form made of plastic is suitable. The plastic used for the printing substrate is, for example, polyethylene terephthalate (PET), polycarbonate (PC), etc., and a sheet-like material is used when a thickness is required, and a film-like material is used when the thickness may be thin. Use things.

  As the printing ink, UV curable resin ink, two-component curable resin ink, evaporation-drying resin ink, and other mixed resin inks can be used. Accordingly, a suitable ink is selected from these inks in consideration of the tree type of the panel body, the molding method, the expression method, and the like. In addition, powdered materials such as UV matting agents, matting agents, urethane beads, glass beads, gold powder, silver powder, and pearl powder can be added to the above ink to exhibit special effects.

  In addition to the above-described injection molding method, a known molding method such as vacuum molding, pressure molding, or hot press molding is applied in order to place the printing substrate in the molding die and mold the panel body. be able to. The molding method performed by placing the printing substrate in a molding die is similar to the insert molding method in a sense, and is a painting molding method (so-called so-called injection molding using a printed plastic film). It is similar to the in-mold molding method. However, since the above-described insert molding method or so-called in-mold molding method is not for transferring the printed pattern to the panel body as in the present invention, it is more appropriate that they are different from each other.

  A panel body made of plastic becomes a decorative panel by colliding and scattering light rays on a decorative element having a concavo-convex structure having a concavo-convex structure of a printed pattern transferred on the surface thereof. In order to make the decorative element stand up by the scattered light guided to the front surface or the back surface of the panel body, it is best to form it with an acrylic resin having high transparency. There are no transparent resins other than acrylic resins, but they all have some color such as milky white, and it may be considered that there is no resin with higher transparency than acrylic resins, so it is necessary to use acrylic resins. It is done.

  A light introducing portion for introducing light into the main body is provided on the end surface of the panel main body made of the acrylic resin. That is, the highly transparent acrylic resin panel body is also used as a means for guiding light rays to a decorative element having an uneven structure. The light introducing portion is provided on the end surface of the panel body where the transparency of the acrylic resin is not impaired. Therefore, as long as the end surface of the panel main body is optically sufficiently clean, it may be removed from the molding die, but if not, processing by a method such as cutting or polishing is also required. When the front shape of the panel body is, for example, a quadrangular shape, the required number of light introducing portions can be provided on the plurality of side portions. As the light source of the light beam introduced into the panel body, it is most desirable to use an LED that emits red, green, blue, white, or colorless light, and arranges it in the light introduction part of the body. Further, when the surface provided with the decorative element composed of unevenness is set as the front, it is possible to obtain a better visual effect when the back surface on which the decorative element 23 is not provided is used as the surface of the panel body.

Since the present invention is configured and operates as described above, it is possible to create a printing substrate having a printing pattern to be a decorative element by printing. Or, by reducing the number, free expression is possible, and a decorative panel that is transparent from the front or back surface of the panel body and is clear and highly appealing can be provided. Further, according to the present invention, it is possible to provide a decorative panel that does not take time to form a decorative element, is suitable for mass production, and can be set at a high and low cost by adding a hand.

  Hereinafter, the decorative panel 10 according to the present invention will be described in more detail with reference to the illustrated embodiment. FIG. 1 shows an example in which a printing pattern is formed by screen printing, 11 is a screen plate making having a screen eye made of polyester, nylon, stainless steel or the like, and 12 is an ink transmission hole formed in the plate film. Screen eyes 13 are screen-making plate frames, which are fixed by tensioning the screen 11. On the screen plate making 11, a printing pattern including characters and designs to be printed is formed.

  Reference numeral 14 denotes the above-described screen printing ink, and reference numeral 15 denotes a printing substrate made of the above-described material such as a PET film. In FIG. 1, when the screen printing ink 14 is moved while being pressed on the screen plate making 11 using a spatula (not shown) called a squeegee, the ink 14 moves the screen eyes 12 having no plate film. The ink 12 'is formed of unevenness that forms a printing pattern on a printing substrate 15 that is transmitted through and extruded and disposed under the screen plate making 11.

  2 and 3 show the injection molding process, 16 is a fixed mold for injection molding, 17 is a mold surface constituting a cavity, 18 is a movable mold for injection molding, and 19 is provided on the side facing the cavity. The printed substrate holding part is shown. In the illustrated example, the printing substrate 15 is fixed to the pins of the printing substrate holding unit 19. 2, the mold clamping state shown in FIG. 3 is reached, and injection molding is performed using a transparent acrylic resin for the cavity 20. In FIG. 4, reference numeral 21 denotes a panel body 21 which is a molded product taken out from the molding machine after injection molding, and a printing pattern is printed on the surface of the panel body 21 formed using acrylic resin. The printing base material 15 is attached integrally with a release material.

FIG. 5 shows a peeling process, in which the printing substrate 15 is removed from the panel body 21 which is a molded product of acrylic resin. Judging from the common knowledge of resin molding, this peeling operation of the printing substrate 15 is performed before the plastic of the panel body 21 is naturally cooled to below normal temperature. When the printing substrate 15 is peeled off from the panel main body 21 together with the printing pattern, the irregularities 22 due to the ink 12 'are transferred to the surface of the panel main body 21, and a decorative element 23 composed of the irregularities 22' is formed on the surface. Since the decorative element 23 is formed on the surface of the panel main body 21, it is seen through from the back if the front is front, and seen from the front if the front is back.

  FIG. 6 shows the decorative effect of the decorative panel 10 according to the present invention created through the above steps. In the illustrated example, when the side on which the decorative element 23 is formed is the front surface, it corresponds to the back surface. The state in which the observer 30 is looking from the side seeing through the panel main body 21 is shown. A light introducing portion 24 for introducing a light beam into the main body is provided on the end surface of the panel main body 21, which is formed of a highly transparent acrylic resin. As the light source 25, an LED emitting red, green, blue, white or colorless light is disposed. As described above, there is a fact that the light guide from the light source can be seen more clearly when the decorative element 23 is seen through from behind.

  FIG. 7 is an illustration of the light source 6 composed of LEDs, where A is a chip-type LED and B is an example in which a large number of LEDs are arranged in a straight line and formed integrally. Reference numeral 26 denotes an LED substrate, and 27 denotes a lead wire. FIG. 8 shows a final structure in which a transparent cover 28, 29 is coated on the surface (back surface) opposite to the decorated surface (front surface) of the panel body 21 which is a molded article having such a configuration. The light source 26 is disposed on the side thereof.

  FIG. 9 shows an example of a decorative panel obtained by the present invention. A is a decorated surface (front surface), and B is an opposite surface (back surface). The decorative element 23 composed of the irregularities 22 ′ is formed so that it can be read correctly when viewed from the back side, and the portions other than the decorative element 23 remain transparent. FIG. 10 illustrates the relationship between the panel main body 21 and the printing base material 15 peeled from the panel main body 21. The state is the same as that shown in FIG. 5, and the uneven shape of the ink 12 'is transferred. A state in which the unevenness 22 'is formed is shown.

  FIG. 11 shows the use of the decorative panel 10 obtained by the present invention. FIG. 11A shows an example of a decorative panel of the vending machine 31. FIG. 11B shows an example of the decorative panel 10 of the game machine 32. FIG. 11C shows an example of the decorative panel 10 of the product display 33. As seen in these examples, the decorative panel 10 according to the present invention is installed in a vending machine 31 that is an attachment target, and performs functions such as a decorative effect and a nighttime electric effect. . In addition to FIG. 11, as described above, the present invention can be applied to postcards, telegrams, indoor / outdoor display panels, indoor / outdoor electric signs, and the like.

  Examples relating to the resin and ink used will be described below.

<Example 1>
Acrylic Acrypet (product name of acrylic resin manufactured by Mitsubishi Plastics) is used as the acrylic resin, and 47 parts by weight of urethane acrylate UV curable resin, 47 parts by weight of glass beads (particle size 25 μm), UV curable type are used as ink. In the present invention, 3 parts by weight of the mat material and some 100 parts by weight as the other release material are used, and injection molding is performed at a molding temperature of 245 ° C. using an injection molding machine (manufactured by Toshiba). A decorative panel was molded.

  A surface for visually recognizing the surface on the opposite side of the decorated surface (front surface) by arranging a light source in which LEDs are arranged in a line at the end of the panel body of the decorative panel that is a molded product A decorative panel was created. The obtained decorative panel was evaluated as being very bright, vivid, and well-preserving the primary color of the LED, and recognizing its high appealing power.

  There is a possibility that it can be used for nighttime display installed under an overpass such as a railroad track, or a traffic sign in general, and a light-emitting display device for all uses.

Sectional drawing for demonstrating an example of the printing process of the decoration panel which concerns on this invention. Sectional drawing explaining an example of the shaping | molding process of the panel main body using the printing base material obtained by FIG. Similarly, sectional drawing which shows the state which has arrange | positioned the printing base material to the molding machine of FIG. 2, and is performing injection molding. Sectional drawing which shows an example of the panel main body by this invention obtained by injection molding. Cross-sectional explanatory drawing which shows the state which has peeled the printing base material from the obtained panel main body. Explanatory drawing which shows the state which has arrange | positioned the light source to the light introduction part of the obtained panel main body, and is looking. The light source which consists of LED is shown, A is an end view, B is a side view. The end view of the decoration panel which concerns on this invention, and explanatory drawing which expands and shows the principal part. The decorative panel which concerns on this invention is shown, A is back surface side explanatory drawing, B is surface side explanatory drawing. Explanatory drawing which shows the state by which ink was transcribe | transferred and the unevenness | corrugation was formed in the panel main body. FIG. 11A illustrates an example of a decorative panel for a vending machine, FIG. 11B illustrates an example of a decorative panel for a game machine, and FIG. 11C illustrates an example of a product display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Decoration panel 11 Screen plate making 12 Screen eye 12 'Ink which consists of unevenness 13 Plate frame 14 Printing ink 15 Printing base material 16 Fixed metal mold | die 17 Mold surface which comprises a cavity 18 Moving mold 19 Printing base material holding | maintenance part 20 Cavity 21 Panel body 22 Concavity and convexity 22 'Concavity and convexity 23 Decoration element 24 Light introduction part 25 Light source 26 LED substrate 27 Lead wire 28, 29 Transparent cover 30 Observer 31 Vending machine 32 Game machine 33 Product display panel

Claims (3)

In a decorative panel formed by transferring a printed pattern including characters and designs formed by printing onto the surface of a plastic sheet,
Forming a panel body made of plastic by placing a printing substrate with a printing pattern consisting of irregularities of ink formed on the surface of the printing substrate with ink added with a powder material in a molding die was carried out, then the printing base material was peeled from the panel main body with print pattern, Ri consists recess formed by the transfer by the protrusion of the ink, the panel body having a decorative element that will be projected from the panel body front or rear surface to the surface Comprising
The panel body has a degree of transparency in order to make the decorative elements stand up on the front or back surface of the panel body by colliding and scattering light rays in the recesses formed on the surface of the panel body and scattered light guided to the front or back surface of the body. is formed by a high resin such as acrylic,
On the end face of the panel main body, a light introducing portion for introducing light into the main body is provided ,
The decorative panel further comprising a transparent cover coated on a surface of the panel body opposite to the decorated surface. The decorative panel according to claim 1, wherein the light introducing portion is provided on a plurality of pieces of a panel body whose front shape is, for example, a quadrangle. The decorative panel according to claim 1 or 2, wherein an LED that emits red, green, blue, white, or colorless light is disposed in a light introducing portion of the panel body as a light source of the light beam introduced into the panel body.

Images