WO2010101021A1 - Processus de production de résine moulée, résine moulée et unité de résine moulée - Google Patents

Processus de production de résine moulée, résine moulée et unité de résine moulée Download PDF

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Publication number
WO2010101021A1
WO2010101021A1 PCT/JP2010/052333 JP2010052333W WO2010101021A1 WO 2010101021 A1 WO2010101021 A1 WO 2010101021A1 JP 2010052333 W JP2010052333 W JP 2010052333W WO 2010101021 A1 WO2010101021 A1 WO 2010101021A1
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WO
WIPO (PCT)
Prior art keywords
resin
light
resin layer
layer
light shielding
Prior art date
Application number
PCT/JP2010/052333
Other languages
English (en)
Japanese (ja)
Inventor
忠頼 寺内
範郎 寺内
麻紀子 外川
Original Assignee
Terauchi Tadayori
Terauchi Norio
Sotokawa Makiko
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terauchi Tadayori, Terauchi Norio, Sotokawa Makiko filed Critical Terauchi Tadayori
Publication of WO2010101021A1 publication Critical patent/WO2010101021A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
    • B29C39/023—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps for making multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
    • B29C39/025—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps for making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B29C2045/0058—Shaping removing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0025—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/466—Keypads, keytops

Definitions

  • the present invention relates to a resin molded product manufacturing method, a resin molded product, and a resin molded product unit.
  • the key top 600 shown in FIG. 6A is formed by injection molding with a light shielding resin on the back side of the light transmitting resin portion 610 injection molded with a light transmitting resin to form a light shielding resin portion 620.
  • the structure is Further, the entire surface of the light transmissive resin portion 610 is painted to form a painted surface 630. By printing with a laser from the upper side of the painted surface 630, the key top 600 forms a desired display on the key top surface.
  • the key top 600 is printed with a laser from the upper side of the painted surface 630, characters and the like to be displayed on the outside can be made clear, but since the surface has fine irregularities, the painted surface 630 on the surface is formed. As a result, there is a high possibility that characters that should be displayed outside are likely to disappear. In addition, it is not preferable to form the painted surface 630 using a paint on the key top 600 at the present time when environmental problems are important.
  • the light-shielding resin is filled into the molding space of the light-transmitting resin molding part accommodated in one mold through the narrow flow path provided in the other mold. And the part for parting of the light shielding resin in the flow path is cut in the vicinity of the root.
  • a key top 650 shown in FIG. 6 (b) among conventional key tops is formed by injection molding with a light shielding resin on the upper side of a light transmissive resin portion 660 which is injection molded with a light transmissive resin.
  • the shielding resin portion 670 is formed.
  • the external display formation parts 660a and 660b which form the display part with respect to the outside have a wedge shape that is driven into the light shielding resin part 670 as a wedge.
  • the above two-color molding method has the following problems.
  • the problem will be described with reference to FIG. 7 showing the two-color molding method.
  • the first problem is that when there are multiple characters to be displayed externally and the distance between adjacent characters is close, the character to be displayed externally is molded using the above two-color molding method. Is difficult.
  • the two-color molding method moves to the character space portions 711 and 712.
  • the mold flow paths 721 and 722 for pouring the light shielding resin interfere with each other (see the elliptical region D in FIG. 7). For this reason, when the distance between adjacent characters or the like is close, it is difficult to form characters or the like to be displayed outside using the two-color molding method.
  • the second problem is that when the character itself is small like the character space portion 713 formed on the back surface of the light-transmitting resin molded portion 710 as shown in FIG. If the light shielding resin extending into the mold flow path 723 is cut after flowing the light shielding resin from the flow path 723, the light shielding resin poured into the character space portion 713 may be peeled off together. It is to have sex. If the above two problems can be solved, the range of key top manufacturing will be expanded.
  • the key top 650 shown in FIG. 6B has the following problems.
  • the external display forming portions 660a and 660b When illuminated by the light source 680 from the back surface of the key top 650, the external display forming portions 660a and 660b have a wedge shape.
  • the light leaks from the thin part of the screen and the outside of the outline of the character formed by the external display forming portions 660a and 660b becomes bright, and as a result, the outline of the external display forming portions 660a and 660b becomes blurred.
  • the outlines of the external display forming units 660a and 660b are blurred, characters to be displayed on the outside become unclear. Key tops with unclear characters or the like to be displayed externally are not preferable.
  • the present invention provides a resin molded product manufacturing method capable of manufacturing a resin molded product having an external display portion regardless of the interval between adjacent external display portions and the size of the external display portion, and the manufacturing method thereof. It is an object of the present invention to provide a molded resin product and a resin molded product unit using the molded resin product.
  • the resin molded product manufacturing method of the present invention includes a recess corresponding to an external display portion to be displayed externally on the back side, and a portion other than the external display portion.
  • a light-transmitting resin layer that is a layer formed of a light-transmitting resin so as to have both or one of the recesses corresponding to the portion, and a light-blocking resin in which the respective recesses are filled with the light-blocking resin
  • the light transmissive resin layer is molded with a transparent resin in the light transmissive resin layer molding step, and a color is formed on the back side of the light transmissive resin layer after the cutting step. It further comprises a colored layer forming step of forming at least one colored layer that is a layer having a color.
  • the resin molded product manufacturing method of the present invention has both or either one of a concave portion corresponding to an external display portion to be externally displayed on the back side and a concave portion corresponding to a portion other than the external display portion.
  • Resin molded product manufacturing for manufacturing a resin molded product comprising a light transmissive resin layer, which is a layer molded from a light transmissive resin, and a light shielding resin portion in which each of the recesses is filled with a light shielding resin
  • the resin molded product of the present invention includes a light transmissive resin layer, which is a layer formed of a light transmissive resin so as to have a recess corresponding to a portion other than an external display portion to be displayed on the back side, and the above A light-shielding resin portion filled with a light-shielding resin, and the recess is provided with a uniform width in a direction substantially perpendicular to the light-transmitting resin layer. .
  • the resin molded product of the present invention is characterized in that at least one colored layer which is a color layer is further provided on the back side of the light transmissive resin layer.
  • the resin molded product unit of the present invention is a light transmissive resin layer that is a layer formed of a light transmissive resin so as to have a recess corresponding to a portion other than an external display portion to be displayed on the back side, A light shielding resin portion filled with a light shielding resin in the recess, and a light source that is located on the back side of the light transmissive resin layer and illuminates the external display portion from the back side.
  • the light-transmitting resin layer is provided with a uniform width in a direction substantially perpendicular to the light-transmitting resin layer. This brings about the effect that the external display part of the resin molding is made clear and the external display part of the resin molding is sufficiently protected.
  • Resin molded product 500 including both a portion in which the external display portion is represented by a light-transmitting resin layer (corresponding to resin molded product 100) and a portion in which the external display portion is represented by a light shielding resin portion. It is a figure which shows this manufacturing method. It is a figure which shows the conventional key top. It is a figure which shows the conventional two-color molding method.
  • FIG. 1 is a diagram showing a configuration example of a resin molded product 100 according to an embodiment of the present invention.
  • the resin molded product 100 of the present invention is a resin molded product having an external display portion (hereinafter referred to as an external display portion) that is a display portion to be displayed on the outside, and a light-transmitting resin is provided on the outer surface.
  • an external display portion an external display portion
  • the external display part is formed by appropriately arranging a light shielding resin part on the back side of the light transmissive resin layer.
  • FIG. 1A is a perspective view of a resin molded product 100.
  • the resin molded product 100 has a box shape as shown in FIG. 1A, and has a letter “H” as an external display portion 110 at the center thereof.
  • the shape of the resin molded product 100 is not limited to the box shape, and may be other shapes.
  • the external display portion 110 may be a plurality of characters instead of a single character such as the character “H”, or may be a symbol or other display. That is, the external display portion 110 may be any display.
  • the light transmissive resin layer and the light shielding resin portion are the resin in FIG. This will be described below with reference to a sectional view of the molded product BB.
  • FIG. 1B is a BB cross-sectional view of the resin molding 100 in FIG.
  • the resin molded product 100 includes a light transmissive resin layer 120, a light shielding resin portion 130, and a colored layer 140.
  • the light transmissive resin layer 120 is a layer formed of a light transmissive resin so as to have a recess 121 corresponding to a portion other than the external display portion 110 on the back side.
  • a light transmissive resin for example, polycarbonate is assumed as the light-transmitting resin, but is not limited thereto.
  • the color of the light transmissive resin layer 120 is assumed to be transparent, it is not limited to this.
  • the light transmissive resin layer 120 includes an upper surface portion 122 and four side surface portions 123 to 126. And the recessed part 121 is formed in the back side of the upper surface part 122, and the back side of the side parts 123 thru
  • the recess 121 is a part corresponding to a part other than the external display part 110.
  • the recess 121 corresponds to a portion other than the portion constituting the character “H”.
  • the recessed part 121 consists of five recessed parts. That is, in FIG. 1B, it can be seen that the recess 121 is composed of five recesses 121a to 121e.
  • the recesses 121 a to 121 c are recesses provided on the back side of the upper surface part 122, and are determined depending on what display is formed as the external display part 110.
  • 1B is a cross-sectional view at a position below the letter “H” in FIG. 1A, and therefore there are three recesses on the back side of the upper surface portion 122. The number and position of the recesses vary depending on the position of the cross section as viewed as a cross-sectional view.
  • the recesses 121 a to 121 c extend with a uniform width in the direction F perpendicular to the upper surface portion 122 of the light transmissive resin layer 120. That is, the recess 121a extends with a uniform width D1 in the direction F perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120 as shown in FIG. Moreover, the recessed part 121b is extended with the equal width D2 to the orthogonal
  • the reason why the concave portions 121a to 121c are extended with a uniform width in the direction F perpendicular to the upper surface portion 122 of the light transmissive resin layer 120 is that when illuminated from the back surface of the light transmissive resin layer 120 using an LED or the like, This is to display the external display portion 110 clearly. That is, the resin molded product 100 of the present invention has a problem of blurring of the character outline caused by light leakage because the portion corresponding to the external display portion of the key top 650 shown in FIG.
  • the recesses 121a to 121c are preferably configured to extend at an equal width in the direction perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120 as described above, but the present invention is not limited to this. It may be configured as follows.
  • the concave portion 121d and the concave portion 121e are concave portions provided on the back side of the side surface portion 123 and the side surface portion 124, respectively.
  • the L-shaped portion on the left side of the dotted line 128 shown in FIG. 1B can be seen as the side surface portion 123, and the L-shaped portion on the right side of the dotted line 129 shown in FIG.
  • the concave portion 121d and the concave portion 121e can be regarded as the concave portions of the side surface portion 123 and the side surface portion 124.
  • the light shielding resin portion 130 is a portion in which the concave portion 121 is filled with a light shielding resin.
  • the portion where the concave portion 121a is filled with the light shielding resin is the light shielding resin portion 130a
  • the portion where the concave portion 121b is filled with the light shielding resin is the light shielding resin portion 130b
  • the concave portion 121c is filled with the light shielding resin.
  • the portion filled with the light shielding resin is the light shielding resin portion 130c
  • the portion filled with the recess 121d with the light shielding resin is the light shielding resin portion 130d
  • the recess 121e is filled with the light shielding resin.
  • the portion is the light shielding resin portion 130e.
  • the concave portion 121 is filled with the light shielding resin to the same height as the adjacent convex portion, but is not limited thereto.
  • the light shielding resin for example, ABS resin is assumed, but it is not limited to this.
  • the colored layer 140 is a layer having a color provided on the back side of the light transmissive resin layer 120.
  • the colored layer 140 for example, a colored paper sheet or a resin film is assumed, but it is not limited thereto.
  • FIG. 1B there may be a plurality as described in FIG.
  • the colored layer 140 is provided on the back side of the light-transmitting resin layer 120, when the resin molded product 100 is viewed from the outside by illuminating from the back side of the colored layer 140, a predetermined portion of the letter “H” is shown in FIG. It seems that the color corresponding to the color of the colored layer 140 is attached.
  • the external display portion can be displayed clearly when illuminated from the back side of the resin molded product 100. Further, if the resin molded product 100 is configured as described above, it does not occur that the painted surface is peeled off and the external display portion is lost like a key top in which the external display portion is configured by laser printing.
  • FIG. 2 is a diagram illustrating a configuration example of a resin molded product unit 200 using the resin molded product 100 according to the embodiment of the present invention.
  • the resin molded product unit 200 is provided with a light source 210 that illuminates from the back side of the resin molded product 100 inside the resin molded product 100.
  • a light source 210 that illuminates from the back side of the resin molded product 100 inside the resin molded product 100.
  • an LED is assumed as the light source 210, but the light source 210 is not limited thereto.
  • the resin molding 100 may be provided with a plurality of colored layers (for example, the colored layer 140a and the colored layer 140b) unlike the case of FIG. That is, a plurality of colored layers of any color may be provided at any position on the back surface of the light transmissive resin layer 120. If the resin molded product 100 is configured in this way, a colorful display can be realized when the resin molded product 100 is illuminated by the light source 210. Further, there is an advantage that the above-described colorful multi-color display can be realized by one light source 210.
  • FIG. 3 is a diagram showing a method for manufacturing the resin molded product 100 according to the embodiment of the present invention.
  • the light transmissive resin layer 120 shown in FIG. 3A is molded by injection molding with a light transmissive resin using a predetermined mold (light transmissive resin layer molding step).
  • the position, size, shape, and the like of the concave portion 121 on the back side of the light transmissive resin layer 120 vary depending on what kind of display is performed as the external display portion 110.
  • the light shielding resin is poured into a predetermined mold so that at least the recess 121 is filled with the light shielding resin, and a light shielding resin layer is formed on the back surface of the light transmitting resin layer 120 (FIG. 3B).
  • the light shielding resin layer 160 shown in FIG. 2 is injection molded (light shielding resin layer molding step).
  • the light shielding resin layer 160 is injection molded, the light shielding resin layer 160 other than the light shielding resin portion 130 is cut along the cutting line 170 shown in FIG. 3B, for example (cutting process). Thereby, as shown in FIG.3 (c), the resin molding 100 is completed. Further, if necessary, a colored layer 140 may be provided by sticking a colored paper sheet or resin film on the back side of the light-transmitting resin layer 120 as shown in FIG. Layer forming step).
  • the cutting process it is difficult to make the resin molding 100 by cutting only the light-shielding resin layer 160 without cutting the light-transmitting resin layer 120 as in the case of cutting along the cutting line 170.
  • the light shielding resin layer 160 and the light transmissive resin layer 120 may be cut along the cutting line 180 shown in FIG. That is, in the cutting process, not only “cutting the light shielding resin layer 160 other than the light shielding resin portion 130” but also “light shielding resin layer 160 other than the light shielding resin portion 130 and the light transmitting property”. “Cutting the resin layer 120” is also included.
  • the cutting line is not limited to a straight U-shaped cutting line such as the cutting lines 170 and 180, and may be a cutting line having another shape.
  • the external display portion 110 is represented by the light-transmitting resin layers 120a and 120b as in the resin molded product 100, and the portions other than the external display portion 110 are represented by the light shielding resin portion 130. Contrary to the above resin molded product, the external display portion 110 is represented by, for example, the light shielding resin portions 130a to 130c shown in FIG. 3C, and the portions other than the external display portion 110 are shown in FIG.
  • the present invention can also be applied to resin molded products represented by the light transmissive resin layers 120a and 120b shown in c).
  • the concave portion formed on the back side of the light transmissive resin layer 120 corresponds to the external display portion, and the concave portion corresponding to the external display portion is filled with a light shielding resin. .
  • a resin molded product having an external display portion can be manufactured regardless of the interval between adjacent external display portions and the size of the external display portion. Further, according to the method of manufacturing the resin molded product 100 as described above, various displays (for example, a display with a small interval between adjacent external display parts, small characters, etc.) are formed on the resin molded product without using paint. It is good for the environment.
  • FIG. 4 is a diagram showing a method for manufacturing the resin molded product 100 according to another embodiment of the present invention.
  • the manufacturing method of the resin molded product 100 in FIG. 4 is obtained by reversing the order of the light-transmitting resin layer molding step and the light shielding resin layer molding step in the manufacturing method of the resin molded product 100 in FIG. explain.
  • the light shielding resin layer 160 shown in FIG. 4A is molded by injection molding with a light shielding resin using a predetermined mold (light shielding resin layer molding step). At this time, the position, size, shape, and the like of the concave portion 161 on the surface side of the light shielding resin layer 160 vary depending on what kind of display is performed as the external display portion 110.
  • the light-transmitting resin is poured into a predetermined mold, and the light-transmitting resin layer 120 shown in FIG. 4B, which is a layer of the light-transmitting resin, is injection-molded above the light-blocking resin layer 160 ( Light transmissive resin layer molding process).
  • the light transmissive resin layer 120 is injection molded, for example, the light shielding resin layer 160 other than the light shielding resin portion 130 is cut along a cutting line 170 shown in FIG. 4B (cutting process).
  • FIG.4 (c) the resin molding 100 is completed.
  • a colored layer 140 may be provided by sticking a colored paper sheet or resin film on the back side of the light-transmitting resin layer 120 as shown in FIG. Layer forming step).
  • the cutting process it is difficult to make the resin molding 100 by cutting only the light-shielding resin layer 160 without cutting the light-transmitting resin layer 120 as in the case of cutting along the cutting line 170.
  • the light shielding resin layer 160 and the light transmissive resin layer 120 may be cut along the cutting line 180 shown in FIG. That is, in the cutting process, not only “cutting the light shielding resin layer 160 other than the light shielding resin portion 130” but also “light shielding resin layer 160 other than the light shielding resin portion 130 and the light transmitting property”. “Cutting the resin layer 120” is also included.
  • the cutting line is not limited to a straight U-shaped cutting line such as the cutting lines 170 and 180, and may be a cutting line having another shape.
  • the external display portion 110 is represented by the light-transmitting resin layers 120a and 120b as in the resin molded product 100, and the portions other than the external display portion 110 are represented by the light shielding resin portion 130.
  • the external display portion 110 is represented by, for example, the light shielding resin portions 130a to 130c shown in FIG. 4C, and the portions other than the external display portion 110 are shown in FIG.
  • the present invention can also be applied to resin molded products represented by the light transmissive resin layers 120a and 120b shown in c).
  • the concave portion formed on the back side of the light transmissive resin layer 120 corresponds to the external display portion, and the concave portion corresponding to the external display portion is filled with a light shielding resin. .
  • a resin molded product having an external display portion can be manufactured regardless of the interval between adjacent external display portions and the size of the external display portion. Further, according to the method of manufacturing the resin molded product 100 as described above, various displays (for example, a display with a small interval between adjacent external display parts, small characters, etc.) are formed on the resin molded product without using paint. It is good for the environment.
  • FIG. 5 includes both a part where the external display part is represented by a light-transmitting resin layer (corresponding to the resin molding 100) and a part where the external display part is represented by a light-shielding resin part. It is a figure which shows the manufacturing method of the resin molding 500.
  • FIG. 5A is a plan view of the resin molded product 500.
  • the external display portion 511 On the right side of the resin molded product 500, the external display portion 511 is “H”, the “H” is represented by a light transmissive resin layer (transparent portion), and the periphery of the “H” is a light shielding resin portion (colored) Part), which corresponds to the resin molded product 100.
  • the external display portion 512 On the left side of the resin molding 500, the external display portion 512 is “H”, the “H” is represented by a light shielding resin portion (colored portion), and the periphery of the “H” is a light-transmitting resin layer. (Transparent part).
  • FIGS. 5 (b) to 5 (d) The manufacturing process of the resin molded product 500 as viewed from the BB cross section of the resin molded product 500 is shown in FIGS. 5 (b) to 5 (d).
  • the manufacturing method in the resin molded product 500 can also be manufactured by the same manufacturing method as the manufacturing method demonstrated in FIG. 3 and FIG. In the following, a method for manufacturing the resin molded product 500 according to the manufacturing method in FIG. 3 will be described.
  • the light transmissive resin layer 520 shown in FIG. 5B is molded by injection molding with a light transmissive resin using a predetermined mold (light transmissive resin layer molding step).
  • the concave portions 521a and 521b on the back side of the light transmissive resin layer 520 are portions corresponding to the displays 511a and 511b in “H” of the left external display portion 511 in FIG.
  • the convex portions 522a and 522b on the back side of the light transmissive resin layer 520 are portions corresponding to the displays 512a and 512b in “H” of the right external display portion 512 in FIG. 5A, respectively.
  • a light shielding resin is poured into a predetermined mold so that at least the recesses 521a to 521e are filled with the light shielding resin, and a light shielding resin layer is formed on the back side of the light transmitting resin layer 520.
  • FIG. The light shielding resin layer 560 shown in (c) is injection molded (light shielding resin layer molding step). If the order of the light transmissive resin layer molding step and the light shielding resin layer molding step is reversed, the manufacturing method in FIG. 4 is the same.
  • the light transmitting resin layer 520 and the light shielding resin layer 560 other than the light shielding resin portion 530 are cut along the cutting line 570 in FIG. Process).
  • the light shielding resin layer 560 may be cut along a cutting line 580 that does not cut the light transmissive resin layer 520 in the cutting step.
  • the resin molding 500 is completed.
  • the light shielding resin portions 530 a and 530 b are portions corresponding to the displays 511 a and 511 b in “H” of the external display portion 511, and the light shielding resin portions 530 c to 530 e are “H” of the external display portion 512. This is a portion corresponding to the periphery of the displays 512a and 512b.
  • a colored layer may be provided if necessary as in the case described with reference to FIGS. 3 and 4 (colored layer forming step).
  • the method of manufacturing the resin molded product 500 as described above it is possible to manufacture a resin molded product having external display portions of various modes regardless of the interval between adjacent external display portions and the size of the external display portions.
  • various displays for example, a display with a small interval between adjacent external display portions, small characters, etc. are formed on the resin molded product without using paint. It is good for the environment.
  • the present invention can be utilized when manufacturing a resin molding having an external display portion such as a key top of a keyboard or a button of an air conditioner of a car.
  • Resin molded product 110 External display portion 120, 520 Light transmissive resin layer 121, 121a, 121b, 121c, 121d, 121e, 161, 521a, 521b, 521c, 521d, 521e Recessed portion 122 Upper surface portion 123, 124, 125 , 126 Side surface portion 130, 130a, 130b, 130c, 130d, 130e Light shielding resin portion 140, 140a, 140b Colored layer 160, 560 Light shielding resin layer 200 Resin molded product unit 210 Light source 522a, 522b Convex portion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)

Abstract

La présente invention se rapporte à un processus de production de résine moulée grâce auquel il est possible de produire une résine moulée ayant des parties présentées sur l'extérieur, quelle que soit la distance entre les parties présentées sur l'extérieur adjacentes ou quelles que soient les tailles des parties présentées sur l'extérieur. Une résine de transmission de lumière est moulée par injection à l'aide d'un moule donné pour former une couche de résine de transmission de lumière (120) comportant des parties évidées (121) sur le côté arrière. Ensuite, une résine de protection contre la lumière est versée dans un moule donné de sorte qu'au moins les parties évidées (121) soient remplies de la résine de protection contre la lumière, et une couche de résine de protection contre la lumière (160) qui est une couche de la résine de protection contre la lumière est moulée par injection sur le côté arrière de la couche de résine de transmission de lumière (120). Après le moulage par injection de la couche de résine de protection contre la lumière (160), la partie de la résine de protection contre la lumière (160) qui est différente d'une partie de résine de protection contre la lumière (130) ou ladite partie et la couche de résine de transmission de lumière (120) sont découpées. Ainsi, une résine moulée présentant des parties présentées sur l'extérieur (110) est achevée.
PCT/JP2010/052333 2009-03-03 2010-02-17 Processus de production de résine moulée, résine moulée et unité de résine moulée WO2010101021A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009048793A JP5498034B2 (ja) 2009-03-03 2009-03-03 樹脂成型物製造方法、樹脂成型物、樹脂成型物ユニット
JP2009-048793 2009-03-03

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WO2010101021A1 true WO2010101021A1 (fr) 2010-09-10

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WO (1) WO2010101021A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6299452B2 (ja) * 2014-06-12 2018-03-28 株式会社豊田自動織機 樹脂成形品
JP7005429B2 (ja) * 2018-05-31 2022-02-04 株式会社東海理化電機製作所 表示入力装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136531U (ja) * 1984-08-06 1986-03-06 株式会社 井上製作所 積算計の照明装置
JPH06226779A (ja) * 1993-02-03 1994-08-16 Yamashita Denki Kk キートップの二色成形方法
JPH06270190A (ja) * 1991-11-12 1994-09-27 Nikko Kogyo Kk １次モールド成形体およびこれを用いた２色モールド成 形品の製造方法
JPH06318418A (ja) * 1993-11-30 1994-11-15 Alps Electric Co Ltd キートップ及びその製造方法
JPH1166997A (ja) * 1997-08-19 1999-03-09 San Arrow Kk 照光式キー及びその製造方法
JP2002298681A (ja) * 2001-03-29 2002-10-11 Shin Etsu Polymer Co Ltd キートップ部材及びスイッチ用部材
JP2003094484A (ja) * 2001-09-21 2003-04-03 Nissei Plastics Ind Co 二色成形方法及び金型装置
JP2004338183A (ja) * 2003-05-14 2004-12-02 Uniden Corp キートップの二色成形方法
JP2005195765A (ja) * 2004-01-06 2005-07-21 Kenwood Corp 光源により照明されるクリアつまみ
JP2006142747A (ja) * 2004-11-24 2006-06-08 Polymatech Co Ltd 加飾成形体及び加飾成形体の製造方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136531U (ja) * 1984-08-06 1986-03-06 株式会社 井上製作所 積算計の照明装置
JPH06270190A (ja) * 1991-11-12 1994-09-27 Nikko Kogyo Kk １次モールド成形体およびこれを用いた２色モールド成 形品の製造方法
JPH06226779A (ja) * 1993-02-03 1994-08-16 Yamashita Denki Kk キートップの二色成形方法
JPH06318418A (ja) * 1993-11-30 1994-11-15 Alps Electric Co Ltd キートップ及びその製造方法
JPH1166997A (ja) * 1997-08-19 1999-03-09 San Arrow Kk 照光式キー及びその製造方法
JP2002298681A (ja) * 2001-03-29 2002-10-11 Shin Etsu Polymer Co Ltd キートップ部材及びスイッチ用部材
JP2003094484A (ja) * 2001-09-21 2003-04-03 Nissei Plastics Ind Co 二色成形方法及び金型装置
JP2004338183A (ja) * 2003-05-14 2004-12-02 Uniden Corp キートップの二色成形方法
JP2005195765A (ja) * 2004-01-06 2005-07-21 Kenwood Corp 光源により照明されるクリアつまみ
JP2006142747A (ja) * 2004-11-24 2006-06-08 Polymatech Co Ltd 加飾成形体及び加飾成形体の製造方法

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JP2010201745A (ja) 2010-09-16
JP5498034B2 (ja) 2014-05-21

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