JP2009166372A - In-mold forming method for printed decorative body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-mold forming method for a printed decorative body by which a printed pattern can be precisely expressed. <P>SOLUTION: The in-mold forming method includes: firstly forming an elastic material layer 52 by coating the surface of a flaked PC plastic layer 51; forming a printed layer 53 dispensing a patterned color by a method of screen printing, planographic printing or other printing; forming an elastic material layer 54 including a curing raw material to be the cured protective layer of the printed layer surface by coating the printed layer surface in a following injection molding process; forming the decorative printed piece into a steric form by heating and vacuuming in a vacuum forming die; press-forming the piece so as to fit into a product profile; and finally injecting a plastic layer 55 on the surface of the flaked PC plastic layer in the plastic injection molding die to make a product. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-mold molding method for a printed decorative body, in particular, a new manufacturing method for giving a pattern color to the surface of a plastic product, placing a pre-made decorative printing piece in a mold, and performing injection molding of the product, In the production of the decorative print piece, where the decorative print piece is integrally bonded to the surface of the product, the pattern color can be diversified more finely than the conventional pattern color printing method by applying two new elastic material layers. Not only can the printing layer be in the middle of the PC plastic flake layer and the elastic material layer, the printing layer is the innermost layer in the conventional method, so that the printing layer is directly impacted by the injection process and peeled off. Problems can be avoided, the protection of the two-layer material can be obtained at the same time, better formability can be obtained, and the printed layer is on the outermost side, Can increase multi-dimensional printing variability, and during the injection process of the outermost elastic material, it can form a cured protective layer on the outer surface, effectively avoiding the problem of cracking or peeling or scratching the printed pattern, The present invention relates to an in-mold molding method for a printed decorative body capable of maintaining the appearance of the outer surface.

 Conventional plastic products are usually limited to the production of single-color injection-molded products due to the limitations of the plastic injection molding technology in manufacturing, so there is no design change and the overall texture is insufficient. . If you want to give a pattern or color to the surface, you can give different color changes by assembling surface printing or separately manufactured members, the former is difficult in the current technology, the surface printing is constant This is not an ideal method because it easily breaks and peels off after time, and the latter is a method in which the product is injection molded as multiple units and these are assembled and assembled, but this increases costs and requires time for assembly. It is expensive and cumbersome, and is still subject to great restrictions in forming patterns and the like, and is not ideal for industrial use.

  As shown in FIGS. 1 to 4, the printed layer 12 is formed by repeatedly printing the necessary pattern colors on the surface of the PC plastic flake layer 11 by screen printing using the PC plastic flake layer 11 as shown in FIGS. Thereafter, the adhesive layer 13 is added to the surface of the printing layer 12 to form the first combined layer 10, and the first combined layer 10 is placed on a vacuum forming mold and heated and vacuum sucked to form a three-dimensional shape. In this work, it is selected whether the vacuum mold has an upper mold or a form without an upper mold according to the molding form, and finally, the first combination layer 10 having the three-dimensional form is press-molded to produce a product appearance. After being finely adjusted and applied with a paint, the first combined layer 10 is placed in a plastic injection mold to obtain a molded product by an in-mold molding method for a printed decorative body. The plastic layer 14 is bonded to the adhesive layer 13 to present a design in which the pattern colors printed by the printing layer 12 change in various ways, giving the aesthetics and texture to the eye.

  Further, as shown in FIG. 5 to FIG. 10, the hardened layer 22 is bonded to the surface of the release paper layer 21, and a print pattern 12 is formed by printing a necessary pattern color on the surface of the hardened layer 22 by color by screen printing. Thereafter, the adhesive layer 24 is formed on the surface of the printing layer 23 to form the second combined layer 20, and the second combined layer 20 is placed on the injection mold 30 and molded by the lower mold 31 and the upper mold 32 of the mold 30. The plastic layer 25 is injected onto the surface of the adhesive layer 24. Finally, the release paper layer 21 is peeled off to obtain a molded product by an in-mold molding method for a printed decorative body. The plastic layer 25 is bonded to the adhesive layer 24, and the pattern printed on the printing layer 23 has a design in which colors change in various ways by using the hardened layer 22 as a surface layer, and gives a visual appearance and texture.

However, since the above two types of in-mold molding methods for printing decorative bodies are directly printed on the surface of the cured layer on the PC plastic flake layer or release paper layer, only the screen printing method can be adopted as the printing method, and screen printing When color-coded and number-of-times printed are used, the degree of printing analysis for images and graphics deteriorates due to plate making and printing consumption, the print quality is difficult to grasp, the product yield is poor, and the printing layer is plastic injection molded The printing layer is easily damaged by direct contact with the injection material, and the lack of the elastic layer structure makes the moldability poor, making it impossible to make more diverse printing changes inside the printing layer, producing efficiency It also affects quality, changes in product development are limited, and there is room for improvement.
JP 2006-350313 A JP 2001-232658 A

In view of many problems and defects existing in the in-mold forming method of the conventional printed decorative body, the object of the manufacturing method of the present invention is to improve the existing manufacturing method. It is not limited to screen printing and can be implemented using lithographic or other printing technology, not only the printing pattern is more detailed and diverse, but also at the same time improve the printing yield and performance, the aesthetics and texture of the product Is to improve.

  Another object of the present invention is to add an elastic material layer to the bottom layer of the printed pattern by improving the manufacturing method, and to add an elastic material layer (including a curing raw material in this layer) on the surface, in the subsequent processing process. The curing process effectively protects the printed pattern and color, increases the plasticity, avoids the problems of cracks, flaking and scratches during vacuum plastic molding or injection molding, Maintain the texture.

  In order to achieve the above-mentioned object, the present invention is designed in the process design by first forming an elastic material layer on the surface of a PC plastic flake layer and then forming a pattern required by screen printing, planographic printing, or other printing methods. After forming a color-formed printing layer, another elastic material layer (including a curing material in this layer) is applied and formed on the surface of the printing layer, and this elastic material layer is used for subsequent injection molding. In the process, it becomes a cured protective layer on the surface of the printed layer, and the decorative printed piece made of these is placed in a vacuum forming mold, vacuumed together with heating, molded into a three-dimensional shape, and pressed to match the appearance contour of the product Finally, it is placed in a plastic injection mold and a plastic layer is injected onto the surface of the PC plastic flake layer to obtain a product. Another method is to place this decorative print piece directly in the injection mold and form it into a three-dimensional shape, and then inject the plastic layer onto the surface of the PC plastic flake layer to remove the mold and cut the molding beam. To complete the product.

In both of the above two methods, the decorative printed piece is bonded to the surface of the product, and the pattern color of the decorative printed piece is exhibited by the in-mold molding method of the printed decorative body. Aesthetics, and without the defects that exist in conventional manufacturing methods, the cured protective layer on its surface eliminates the problems of cracks, flaking and scratches, improves yield, and increases production speed. In addition, cost can be reduced, competitiveness can be improved, and industrial utility value can be deeply obtained.

FIGS. 11 to 15 are views showing a first preferred embodiment of the present invention, which employs a PC plastic flake layer 41 and is formed on the surface of the PC plastic flake layer 41 by a screen printing or coating machine or an intaglio printing method. Is formed, and a printing layer 43 is formed on the surface of the elastic material layer 42 by printing a necessary pattern color by screen printing, lithographic printing, or other printing method, and then another layer of elasticity is formed on the surface of the printing layer 43. The material layer 44 is applied and formed to form a combined layer 40. Finally, the combined layer 40 is placed on a vacuum forming die and heated and vacuum sucked to form a three-dimensional shape. In this vacuum forming, it is selected whether the vacuum plastic mold has an upper mold or a form without an upper mold in accordance with the plastic shape.
Finally, the three-dimensional combination layer 40 is press-molded to form a contour shape suitable for the product appearance, fine adjustment and coating are applied, and then the combination layer 40 is placed at a predetermined position in the plastic injection mold. Then, the plastic layer 45 is injected onto the surface of the PC plastic flake layer 41 to obtain a molded product of the in-mold molding method of the printed decorative body of the first preferred embodiment. In this embodiment, the combination layer 40 is formed by combining the elastic material layer 44, the printing layer 43, the elastic material layer 42, the PC plastic flake layer 41, and the plastic layer 45 in order, and the printing layer 43 has a pattern color to be printed. Give visual aesthetics.

  FIGS. 16 to 22 are views showing a second preferred embodiment of the present invention, in which a PC plastic flake layer 51 is adopted, and an elastic material layer 52 is formed on the surface of the PC plastic flake layer 51 by screen printing, a coating machine or an intaglio printing method. The printed layer 53 is formed by applying a pattern color required by screen printing, lithographic printing, or other printing methods on the surface of the elastic material layer 52, and then forming another layer of elasticity on the surface of the printing layer 53. After the material layer 54 is applied to form the combined layer 50, the combined layer 50 is placed in the injection mold 60 and plastically processed into a three-dimensional shape between the lower mold 61 and the upper mold 62 of the injection mold 60, and then the plastic layer 55. Is ejected onto the surface of the PC plastic layer 51, and is subjected to die cutting and cutting to obtain a molded product of the in-mold molding method of the printed decorative body of the second preferred embodiment. In the present embodiment, the elastic material layer 54, the printing layer 53, the elastic material layer 52, the PC plastic flake layer 51, and the plastic layer 55 are combined in order to form the combined layer 50, and the printed layer 53 visually recognizes the pattern color to be printed. Give a sense of beauty.

 As described above, according to the present invention, in the production method of in-mold decoration printing, after applying an elastic member to the surface of the PC plastic flake layer, the necessary pattern color is elasticized by screen printing, lithographic printing or other printing methods. Print on the material surface, and finally apply and form another elastic material layer (including the curing raw material in this layer) on the surface of the printing layer, and this elastic material layer will be applied to the printed surface during the subsequent injection molding process. A decorative printed piece is formed on the basis of the cured protective layer, and the decorative printed piece is placed on a vacuum molding die, vacuum suction is performed with heating, and plastic molding is performed into a three-dimensional shape, which conforms to the outline of the product. Finally, it is placed in a plastic injection mold, and a plastic layer is injected onto the surface of the PC plastic flake layer to obtain the product. The other method is to directly place this decorative printed piece in a plastic mold and form it into a three-dimensional shape, then inject the plastic layer onto the surface of the PC plastic thin layer, and cut it at the same time as the die cutting. Product. In both of the above-described two methods, the decorative printed piece is bonded to the surface of the product, and the pattern color of the decorative printed piece is expressed by the in-mold molding method of the printed decorative body. And has no defects existing in the conventional manufacturing process, the cured protective layer on the surface eliminates the problems of cracks, peeling off, scratches, improves the yield, increases the production speed, Cost can be reduced, competitiveness can be improved, and industrial use value can be deeply possessed.

It is explanatory drawing 1 of the conventional 1st type in-mold decorative printing piece manufacturing method. It is explanatory drawing 2 of the conventional 1st type in-mold decorative printing piece manufacturing method. It is explanatory drawing 3 of the conventional 1st type in-mold decorative printing piece manufacturing method. It is explanatory drawing 4 of the conventional 1st type in-mold decorative printed piece manufacturing method. It is explanatory drawing 1 of the conventional 2nd type | mold internal decoration printing piece manufacturing method. It is explanatory drawing 2 of the conventional 2nd type | mold internal decoration printing piece manufacturing method. It is explanatory drawing 3 of the conventional 2nd type | mold internal decoration printing piece manufacturing method. It is explanatory drawing 4 of the conventional 2nd type | mold internal decoration printing piece manufacturing method. It is explanatory drawing 5 of the conventional 2nd type | mold internal decoration printing piece manufacturing method. It is explanatory drawing 6 of the conventional 2nd type interior decoration printing piece manufacturing method. It is 1st comparative example explanatory drawing 1 of the in-mold shaping | molding method of the printing decoration body of this invention. FIG. 2 is an explanatory diagram for explaining a first comparative example of an in-mold molding method for a printed decorative body according to the present invention. FIG. 3 is a first comparative example explanatory diagram 3 of an in-mold molding method for a printed decorative body according to the present invention. FIG. 4 is a first comparative example explanatory view 4 of an in-mold molding method for a printed decorative body of the present invention. FIG. 5 is an explanatory diagram for explaining a first comparative example of the in-mold molding method of the printed decorative body of the present invention. It is 2nd comparative example explanatory drawing 1 of the in-mold shaping | molding method of the printing decoration body of this invention. It is 2nd comparative example explanatory drawing 2 of the in-mold shaping | molding method of the printing decoration body of this invention. FIG. 3 is a second comparative example explanatory diagram 3 of an in-mold molding method for a printed decorative body according to the present invention. FIG. 4 is an explanatory diagram for explaining a second comparative example of the in-mold molding method of the printed decorative body of the present invention. FIG. 5 is a second comparative example explanatory diagram 5 of an in-mold molding method for a printed decorative body according to the present invention. FIG. 6 is an explanatory diagram for explaining a second comparative example of the in-mold molding method of the printed decorative body of the present invention. FIG. 7 is an explanatory diagram for explaining a second comparative example of the in-mold molding method of the printed decorative body of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st combination layer 11 PC plastic flake layer 12 Print layer 13 Adhesive layer 14 Plastic layer 20 Second combination layer 21 Release paper 22 Hardened layer 23 Print layer 24 Adhesive layer 25 Plastic layer 30 Injection mold 31 Lower mold 32 Upper mold 40 Combined layer 41 PC plastic flake layer 42 Elastic material layer 43 Print layer 44 Elastic material layer 45 Plastic layer 50 Combined layer 51 PC plastic flake layer 52 Elastic material layer 53 Print layer 54 Elastic material layer 55 Plastic layer 60 Injection mold 61 Lower mold 62 Upper mold

Claims (4)

After the elastic material layer is applied to the PC plastic flake layer, a printing layer on which the pattern color is printed is formed by screen printing or lithographic printing or other printing method, and the printed surface is printed on the printed layer during the subsequent injection molding process. A decorative printed piece is formed by applying and forming an elastic material layer containing a single layer of curing material, which is a protective layer for curing, and this decorative printed piece is placed on a vacuum molding die and heated to form a three-dimensional shape by vacuum suction. Molding and press-molding to the appearance contour of the product, and finally placing it in the plastic injection mold and injection molding the plastic layer on the surface of the PC plastic flake layer, or directly the decorative printed piece into the mold Placed and molded into a three-dimensional shape, the plastic layer is injection-molded on the surface of the PC plastic flake layer, and the product is processed by cutting at the same time as the die-cutting. Body in-mold molding method. An elastic material layer is used for the PC plastic flake layer, and an elastic material layer is applied and formed on the surface of the PC plastic flake layer by screen printing or a coating machine or an intaglio printing method, and screen printing or planographic printing or The pattern color is printed by other printing methods to form a printed layer, and another elastic material layer is applied and formed on the surface of the printed layer to form a combined layer. Depending on the vacuum mold with or without the upper mold, vacuuming with heating and molding into a three-dimensional shape,
Finally, the three-dimensional combination layer is press-molded to form the contour shape of the product, fine adjustment and coating are applied if necessary, and then the combination layer is placed in a plastic injection mold. 2. The method for in-mold molding of a printed decorative body according to claim 1, wherein the injection is performed on the surface of the PC plastic flake layer. Adopting PC plastic flake layer, applying and forming elastic material layer on the surface of PC plastic flake layer by screen printing or coating machine or intaglio printing method, and patterning by screen printing, planographic printing or other printing method on the surface of elastic material layer Color is printed to form a printed layer, and then another elastic material layer is applied and formed on the surface of the printed layer to form a combined layer, which is placed in the injection mold and placed under the injection mold. 2. The in-mold of a printed decorative body according to claim 1, wherein after plastic processing into a three-dimensional shape between the mold and the upper mold, a plastic layer is injected onto the surface of the PC plastic layer, and a cutting process is performed simultaneously with die cutting. Molding method. 2. The in-mold molding method for a printed decorative body according to claim 1, wherein the pattern color of the printing layer of the decorative printing piece is based on screen printing, planographic printing, or intaglio printing.

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