JP2008094038A - Mold for in-mold decoration, apparatus for in-mold decoration, and manufacturing method of in-mold decoration product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold for in-mold decoration which shortens a molding cycle time, is usable even in an injection molding machine having a small mold opening/closing stroke, has low risk of getting broken owing to the transfer control error of the take-out apparatus of the molded product, and hardly causes the flow of the pattern. <P>SOLUTION: The mold for in-mold decoration has the mold A and the mold B that is at the position facing the mold A and has an injection port. It is equipped with a heating apparatus on almost the same plane as the cavity forming face of at least the mold A or mold B. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention, in the production of a simultaneously molded decorative molded product, is capable of deep drawing decoration on a molded product having a large three-dimensional surface shape change, and has a short molding cycle time, The present invention relates to a simultaneous molding decorative device and a method for manufacturing a simultaneous molded decorative molded product.

  Conventionally, an injection molding simultaneous decorating method has been used to decorate exterior parts such as mobile phones, home appliances, cosmetic containers, and miscellaneous goods. As an example of the simultaneous injection molding decoration method, a decorative sheet made of thermoplastic resin is heated and softened in advance, and then vacuum-molded on the decorative sheet using a female mold provided with a vent for vacuum forming. There is a deep drawing simultaneous decorating method in which a molten resin is injected into a mold and a decorative sheet is integrated with the outer surface of the molded product.

  And one of the methods of pre-heating and softening the decorative sheet is a part of the decorative sheet in a position facing the mold cavity forming surface after the mold is opened and the heating mechanism is entered into the mold. There are some that heat soften. In Patent Document 1, the heating device 4 that heats and softens the decorative sheet by the above-described method and the molded product take-out device 41 are integrated, and a short time and space for opening the male mold and the female mold are utilized. A technique relating to an injection molding simultaneous painting apparatus that improves productivity is disclosed (see FIG. 8).

Japanese Patent Publication No.4-2418

  However, in the injection molding simultaneous painting apparatus of Patent Document 1, 1. Since the heating time of the decorative sheet is required in addition to the molding time, the molding cycle time becomes long for about 10 to 15 seconds. 2. Since it is necessary to take a large mold opening amount so that the integrated product of the heating device and the molded product take-out device enters the mold, an injection molding machine with a small mold opening / closing stroke cannot be used. Since a heating device having a large volume and weight also enters the mold, the risk of mold breakage due to a movement control error is greater than when only a relatively small volume and weight molded product take-out device enters the mold. . Since the base sheet is heated through the design layer, when the decorative sheet softens sufficiently, the design layer also softens, so the design layer flows with the flow of resin during injection molding, so-called ink flow There is a problem that a defect phenomenon is likely to occur.

  Therefore, the present invention eliminates the above-mentioned problems, shortens the molding cycle time, can be used with an injection molding machine with a small mold opening / closing stroke, and reduces the risk of mold breakage due to a molding product take-out device movement control error. An object of the present invention is to provide a mold for simultaneous decorating that hardly causes a problem of ink flow.

  In order to achieve the above object, the present invention is configured as follows.

  The mold for simultaneous decorating of the present invention includes an A mold and a B mold having an injection port at a position facing the A mold, and at least substantially the same as the cavity forming surface of the A mold or the B mold. It comprised so that a heating apparatus might be provided on the same surface.

  Moreover, in the said structure, it comprised so that a heating apparatus might be a heating plate.

  Moreover, in the said structure, it comprised so that a heating apparatus might be a heating gas blowing apparatus.

  Moreover, in each said structure, it comprised so that the metal mold | die provided with a heating apparatus might also be provided with a suction circuit.

  Moreover, the molding simultaneous decoration apparatus of this invention is equipped with the said metal mold | die for simultaneous decoration and a decoration sheet supply apparatus, and a heating apparatus exists between the feed roll of a cavity formation surface and a decoration sheet supply apparatus. It was configured as follows.

  Moreover, the simultaneous molding decoration apparatus of this invention is equipped with the said shaping | molding mold for simultaneous decoration, a decoration sheet supply apparatus, and the decoration sheet by which the pattern for 1 shot was arrange | positioned at fixed intervals, A heating apparatus is provided. The space between the cavity forming surface and the feeding roll of the decorative sheet supply device is such that the distance between the heating device and the cavity forming surface is substantially the same as the interval of the pattern for one shot.

  The method for producing a molded simultaneous decorative molded product according to the present invention includes a decorative sheet in which the base sheet side is preliminarily heated and softened at least when the mold is clamped using the above-mentioned simultaneous molding decorative mold or the above-mentioned simultaneous molding decorative device. After opening the mold, it was transferred to at least the cavity forming surface of the A mold or B mold, and then clamped to inject the molten resin into the molding space formed by the cavity forming surface.

  Since the molding simultaneous decorating mold, the molding simultaneous decorating device, and the method for producing a molded simultaneous decorating molded product of the present invention have the above-described configuration, they have the following excellent effects.

  That is, the mold for simultaneous decorating of the present invention includes a heating device at least on the same plane as the cavity forming surface of the A mold or the B mold. Therefore, since the decorative sheet before being transferred to the mold cavity can be heated and softened in advance, the molding cycle time can be shortened by the time for heating the decorative sheet. Further, since the heating device having a large volume does not enter the mold, the molded product can be sufficiently taken out with a small mold opening amount and can be used even in an injection molding machine having a small mold opening / closing stroke. In addition, since a heating device having a large volume and weight does not enter the mold, the risk of damage to the mold due to a mistake in controlling movement of the molded product take-out apparatus is reduced. Further, since the heating device is provided on substantially the same plane as the cavity forming surface, the base sheet is heated directly from the base sheet side of the decorative sheet. As a result, 1. 1. The design layer will not be discolored by heat damage. Since the decorative sheet can be sufficiently softened without softening the design layer, an effect of suppressing the occurrence of ink flow while improving the elongation of the decorative sheet can be obtained.

  Moreover, the mold for simultaneous decorating of the present invention can include a suction circuit as well as a heating device. Therefore, after the decorative sheet heated and softened in advance is transferred to the mold cavity, the air between the mold cavity and the decorative sheet is deaerated through the suction circuit so that the decorative sheet follows the mold cavity. Therefore, the molding resin filling defect due to the air accumulation between the mold cavity and the decorative sheet does not occur.

  Moreover, as for the shaping | molding simultaneous decorating apparatus of this invention, a heating apparatus exists between the feed roll of a cavity formation surface and a decorating sheet supply apparatus. Therefore, since the decorative sheet before being transferred to the mold cavity, which is between the cavity forming surface and the feeding roll of the decorative sheet supply device, can be heated and softened in advance, the time for heating the decorative sheet Only the molding cycle time can be shortened.

  Further, in the molding simultaneous decorating device of the present invention, the heating device is between the cavity forming surface and the feeding roll of the decorative sheet feeding device, and the interval between the heating device and the cavity forming surface is between one pattern for one shot. It can be made almost the same as the interval. Therefore, since the decorative sheet before being transferred to the mold cavity, which is between the cavity forming surface and the feeding roll of the decorative sheet supply device, can be heated and softened in advance, the time for heating the decorative sheet Only the molding cycle time can be shortened. Moreover, the design part of the decoration sheet before shaping | molding between the feed roll of a decoration sheet supply apparatus and a metal mold cavity can be heat-softened reliably.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the mold for simultaneous decorating molding of the present invention and an embodiment of the process for producing the molded simultaneous decorating molded article of the present invention, and FIGS. Sectional drawing which shows one Example of the process of the manufacturing method of a molding simultaneous decoration molded product, FIG. 6 is one Example of the transfer sheet which is an example of the decoration sheet used for the metal mold | die for simultaneous molding of this invention. FIG. 7 is a cross-sectional view showing an embodiment of the mold for simultaneous decorating of the present invention, and FIG. 8 is a cross-sectional view showing an embodiment of the mold for simultaneous decorating of the prior art. In the figure, 1 is an A mold, 2 is a B mold, 3 is an injection port, 4 is a heating device, 5 is a suction circuit, 6 is a clamp, 7 is a cavity forming surface, 8 is a cavity forming surface, and 11 is a transfer sheet. , 12 is a pattern for one shot, 13 is a base sheet, 14 is a decorative layer, 15 is a release protective layer, 16 is a pattern layer, 17 is an adhesive layer, 21 is a decorative sheet supply device, 22 is a supply roll, 23 Is a feeding roll, 24 is a decorative sheet take-up device, 25 is a take-up roll, 26 is a feed roll, 31 is a simultaneously molded decorative molded product, 32 is a molten resin, 41 is a molded product take-out device, and 42 is a movable support. Respectively.

  The mold for simultaneous decorating of the present invention includes an A mold 1 and a B mold 2 which is located at a position facing the A mold 1 and has an injection port 3. Normally, when this mold is installed in a horizontal injection molding machine, the A mold 1 is a movable mold and the B mold 2 is a fixed mold. For example, when installing in a vertical molding machine, the A mold 1 Since the B mold 2 is a movable mold, the A mold 1 is not necessarily a movable mold and the B mold 2 is not necessarily a fixed mold. The mold for simultaneous decorating of the present invention is not limited to the two-plate configuration of the A mold and the B mold, but may be a three-plate configuration including a runner stripper plate. The A mold 1 and the B mold 2 are provided with cavity forming surfaces 7 and 8 for forming the simultaneously molded decorative molded product 31 (see FIG. 1).

  The heating device 4 is for heating and softening the base sheet 13 of the decorative sheet in advance so that the decorative sheet transferred to the cavity forming surface can be easily along the cavity forming surface. The heating device 4 is provided in at least the A mold 1 or the B mold 2. That is, the heating device 4 may be provided only in the A mold 1 (see FIG. 1), may be provided only in the B mold 2 (see FIG. 7), or both sides of the simultaneously decorated decorative molded product are added. When decorating, the heating device 4 may be provided on both the A mold 1 and the B mold 2. The heating device 4 is: 1. In order to be able to heat the decorative sheet during mold opening, In order to heat the base sheet 13 directly from the base sheet 13 side of the decorating sheet, it is preferable to provide the base sheet 13 in a mold for arranging the decorating sheet. Since the heating device 4 is provided on substantially the same plane as the cavity forming surface of the mold provided with the heating device (see FIG. 1), the heating device 4 is directly attached to the base sheet 13 from the base sheet 13 side of the decorative sheet. 13 is heated. As a result, 1. 1. The design layer will not discolor due to heat damage. Since the decorative sheet can be effectively softened without softening the design layer 16, the effect of suppressing the occurrence of ink flow can be obtained while improving the elongation rate of the decorative sheet. On the contrary, if the heating device 4 is arranged in the mold on which the decorative sheet is not arranged, the decorative sheet cannot be heated when the mold is opened, and the pattern layer 16 is also heated. There is a risk of flow.

  More specifically, the heating device 4 is provided between the cavity forming surface and a feed roll 23 of the decorative sheet supply device 21 described later (see FIG. 1). The heating device 4 normally has this interval when the symbols 12 for one shot are arranged at regular intervals on the decorative sheet, that is, when the intervals between the symbols 12 for one shot are constant. The position of the heating device 4 is adjusted so that the distance between the heating device 4 and the cavity forming surface is substantially the same (see FIG. 1). Here, the interval between the patterns 12 for one shot refers to the interval between the centers of the adjacent patterns 12 for one shot, and the interval between the heating device 4 and the cavity forming surface refers to the distance between the heating devices 4. It refers to the distance between the center and the center of the cavity forming surface.

  As the heating device 4, an integrated object having a size that covers a pattern for one shot is usually used, but it may be composed of a plurality of heating device groups. For example, when a symbol for one shot is composed of a plurality of symbols, it may be composed of a heating device group having the same number of symbols. Moreover, you may make it arrange | position locally only the place which wants to heat-soften.

  As the heating device 4, for example, one end portion covers a pattern for a plurality of shots that is long enough to be near the feed roll 23 of the decorative sheet supply device 21, which will be described later, and the other end portion near the cavity forming surface. A length of heating device 4 may be used. If the design for multiple shots can be heated, the decorative sheet can be heated slowly and gradually compared to the case of heating the design for one shot, which makes it easier to control the temperature of the decorative sheet. effective.

  A conventionally known heating plate can be used as the heating device 4. When a heating plate is used, it becomes a relatively thin heating device, and is particularly suitable for installation in a small molding simultaneous decorating mold. Further, a heated gas blowing device can be used as the heating device 4. Since the diameter of the heated gas blowing port is generally as small as about 5 mm, it is effective to use the heated gas blowing device when it is desired to locally soften the decorative sheet. In addition, a combination of a heating plate and a heated gas blowing device may be used as the heating device 4.

  The set temperature of the heating device 4 is preferably 50 ° C to 300 ° C. This is because if the temperature is less than 50 ° C., the decorative sheet is hardly softened, and if it exceeds 300 ° C., there is a problem that the decorative sheet is greatly deformed when the decorative sheet is transferred to the cavity forming surface.

  The suction circuit 5 may be provided in a mold provided with the heating device 4 (see FIG. 1). By degassing the air between the mold cavity and the decorative sheet from the mold cavity through the suction circuit 5 connected to a suction device (not shown), the decorative sheet can be along the mold cavity. Molding resin filling failure due to air accumulation between the mold cavity and the decorative sheet does not occur.

  The clamp 6 is preferably provided in a mold provided with the heating device 4 (see FIG. 1). Immediately after the position of the transferred decorative sheet is determined, the clamp 6 is closed so as to sandwich the decorative sheet in the mold parting line. 1. Hold the position of the decorative sheet as it is, When the air between the mold cavity and the decorative sheet is deaerated through the suction circuit 5, it has two roles of preventing air from flowing in between the decorative sheet and the mold parting line.

  The transfer sheet 11 which is an example of the decorating sheet used for the mold for simultaneous decorating of the present invention will be described.

  In the transfer sheet 11, there are a case where the pattern 12 for one shot is provided at intervals in the longitudinal direction (see FIG. 1) and a case where the pattern is continuous, for example, a grain pattern or an abstract pattern. . In general, the pattern 12 for one shot is composed of one pattern when the number of products is one, that is, when there is one mold cavity, and when the number of products is a plurality of molds, When there are a plurality of mold cavities, it is composed of a plurality of designs. The transfer sheet 11 includes a base sheet 13 and a decoration layer 14, and the decoration layer 14 is provided with a peeling protection layer 15 and a pattern layer 16 constituting the pattern 12 for one shot thereon. Further, an adhesive layer 17 is provided on the design layer 16, and comes into contact with and adheres to the molten resin 32 at the time of simultaneous molding, so that the design layer 16 is peeled from the base sheet 13 together with the release protective layer 15. Then, the decorative layer 14 is transferred to the resin molded product (see FIG. 6).

  As a material of the base sheet 13, a single layer sheet selected from polycarbonate resin, polyamide resin, polyimide resin, polyester resin, acrylic resin, olefin resin, urethane resin, acrylonitrile butadiene styrene resin, Or what is used as an expected base sheet of a normal decorative sheet, such as a laminated sheet or copolymer sheet made of two or more resins selected from the above, can be used. Further, a release layer may be formed on the base sheet 13 in order to improve the peelability of the base sheet 13. As the release layer, aminoalkyd resins, epoxy resins, melamine resins, urea resins, polyurethane resins, polyester resins, phenol resins, or a mixed resin thereof can be used. As a method for forming the release layer, there are a coating method such as a gravure coating method, a roll coating method, a comma coating method and a lip coating method, a printing method such as a gravure printing method and a screen printing method. Further, when forming the release layer, the surface of the base sheet 13 can be subjected to corona treatment or easy adhesion treatment.

  The thickness of the base sheet 13 is preferably 5 to 500 μm. If the sheet is less than 5 μm, the handling when placed in the mold is poor and the molding process becomes unstable. If the sheet exceeds 500 μm, the rigidity becomes too large and cannot be used appropriately in the molding process.

  The release protective layer 15 is formed entirely or partially on the base sheet 13 or the release layer. When the base sheet 13 is peeled off after simultaneous molding, the peel protection layer 15 peels from the base sheet 13 or the release layer and becomes the outermost surface of the molded simultaneous decorative molded product.

  The material of the release protection layer 15 is acrylic resin, nitrified cotton resin, polyurethane resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, epoxy resin, polycarbonate. Resin, olefin resin, acrylonitrile butadiene styrene resin, or the like may be used. When the peel protection layer 15 is required to have hardness, a photo-curable resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, or a thermosetting resin may be selected and used.

  The thickness of the peeling protective layer 15 is preferably 0.5 to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing. The peeling protective layer 15 may be colored or uncolored. Examples of the method for forming the peeling protection layer 15 include a coating method such as a gravure coating method, a roll coating method, and a comma coating method, a printing method such as a gravure printing method, and a screen printing method.

  The design layer 16 is usually formed on the release protection layer 15 as a printing layer. Materials for the printing layer include acrylic resins, nitrified cotton resins, polyurethane resins, chlorinated rubber resins, vinyl chloride-vinyl acetate copolymer resins, polyamide resins, polyester resins, epoxy resins, etc. It is preferable to use a colored ink containing a suitable color pigment or dye as a colorant. As a method for forming the printing layer, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. In particular, the offset marking method and the gravure printing method are suitable for performing multicolor printing and gradation expression. In the case of a single color, a coating method such as a gravure coating method, a roll coating method, or a comma coating method may be employed. The print layer is provided on the entire surface or partially depending on the design to be expressed.

  The design layer 16 may be composed of a metal thin film layer or a combination of a printed layer and a metal thin film layer. The metal thin film layer is for expressing metallic luster as the pattern layer 16, and is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method or the like. In this case, a metal such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, or zinc, or an alloy or compound thereof is used depending on the metallic luster color to be expressed.

  The thickness of the pattern layer 16 is preferably 0.5 μm to 50 μm. If the film thickness is less than 0.5 μm, there is a problem that sufficient designability cannot be obtained, and if it is more than 50 μm, there is a problem that it is difficult to dry after printing. However, in the case of a metal film layer, 50-1200 micrometers is preferable. This is because when the thickness of the metal film layer is less than 50 μm, there is a problem that sufficient metallic luster cannot be obtained, and when it is more than 1200 μm, there is a problem that cracks are likely to occur.

  The adhesive layer 17 adheres each of the above layers to the surface of the resin molded product. The adhesive layer 17 is formed in a portion to be bonded. That is, the adhesive layer 17 is formed on the entire surface of the design layer 16 when the portion to be bonded is entire. When the part to be bonded is partial, the adhesive layer 17 is partially formed on the design layer 16. As the adhesive layer 17, a heat-sensitive or pressure-sensitive resin suitable for the material of the resin molded product is appropriately used. For example, when the material of the resin molded product is a polyacrylic resin, a polyacrylic resin may be used. In addition, when the material of the resin molded product is a polyphenylene oxide copolymer polystyrene copolymer resin, polycarbonate resin, styrene resin, or polystyrene blend resin, a polyacrylic resin or polystyrene having an affinity for these resins Resin, polyamide resin, etc. may be used. Further, when the material of the resin molded product is a polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber, and coumarone indene resin can be used.

  The thickness of the adhesive layer 17 is preferably 0.5 to 50 μm. When the film thickness is less than 0.5 μm, there is a problem that sufficient adhesion cannot be obtained, and when it is more than 50 μm, there is a problem that it is difficult to dry after printing. Examples of the method for forming the adhesive layer 133 include a coating method such as a gravure coating method, a roll coating method, and a comma coating method, and a printing method such as a gravure printing method and a screen printing method.

  In addition, the structure of the decoration layer 14 is not limited to the above-described embodiment. For example, when using a material having excellent adhesiveness with the molded simultaneous decoration molded product 31 as the material of the pattern layer 16, adhesion is performed. Layer 17 can be omitted.

  In addition to the transfer sheet 11 described above, an insert sheet (not shown) can also be used for the decorating sheet used in the mold for simultaneous decorating of the present invention. The insert sheet is obtained by removing the release layer and the release protective layer 15 from the configuration of the transfer sheet 11. The insert sheet is bonded and integrated with the surface of the resin molded product after molding, and the outer peripheral portion protruding from the molded product is cut off.

  A conventionally known foil feeding device can be used for the decorative sheet supply device 21 and the decorative sheet take-up device 24 used in the simultaneous molding decorative device of the present invention. The decorative sheet supply device 21 is for transferring the decorative sheet from the supply roll 22 to the mold cavity via the feed roll 23. The decorative sheet winding device 24 is for winding the decorative sheet from the mold cavity onto the winding roll 25 via the feed roll 26.

  The decorative sheet supply device 21 and the decorative sheet take-up device 24 are not limited to being installed in the vertical direction, and may be installed in the horizontal direction. In particular, when performing double-sided decoration, the decorative sheet supply device 21 and the decorative sheet take-up device 24 are installed in the vertical direction on one mold, and the decorative sheet supply device 21 is mounted on the other mold. When the decorative sheet winding device 24 is installed in the horizontal direction, it is preferable that the devices do not interfere with each other.

  When an insert sheet is used for the decorative sheet, the insert sheet on the outer periphery of the simultaneously molded decorative article 31 is also taken out from the mold as an integral part of the simultaneously molded decorative article 31, so that the molded insert sheet is wound up. It may not be necessary. In this case, the decorative sheet take-up device 24 is not provided, and only the decorative sheet supply device 21 is used.

  The molding resin of the molded simultaneous decorative molded product 31 may be transparent, translucent, or opaque. In addition, the molding resin of the molded simultaneous decorative molded product 31 may be colored or not colored. The molding resin for the simultaneous decorative molding 31 is acrylic resin, polycarbonate resin, styrene resin, polyamide resin, Noryl (trademark) resin, polyester resin, olefin resin, urethane resin, acrylonitrile butadiene. Mention may be made of thermoplastic resins such as styrene resins. Also, general engineering resins and polysulfone resins such as polyphenylene oxide / polystyrene resins, polycarbonate resins, polyacetal resins, polyacrylic resins, polycarbonate-modified polyphenylene ether resins, polyethylene terephthalate resins, polybutylene terephthalate resins, and ultrahigh molecular weight polyethylene resins. Super engineering resins such as polyphenylene sulfide resins, polyphenylene oxide resins, polyarylate resins, polyetherimide resins, polyimide resins, liquid crystal polyester resins, and polyallyl heat-resistant resins can also be used.

  An example of the method for producing a simultaneously molded decorative article of the present invention will be described using the transfer sheet 11 as an example of a decorative film.

  At a position facing the cavity forming surface 7 of the A mold 1, the transfer sheet 11 in which the portion of the pattern 12 for one shot is preheated and softened by the heating device 4 as a heating plate is placed on the cavity forming surface 7 for one shot. It was transferred so that the position of the pattern 12 of At this time, the pattern 12 for one shot to be transferred into the mold next time is arranged at a position facing the heating device 4, and the base sheet 13 side of the transfer sheet 11 at this location is heated by the heating device 4. (See FIG. 1).

  Next, the clamp 6 sandwiches the transfer sheet 11 in the mold parting line, and the pattern 12 for one shot comes into close contact with the cavity forming surface 7 by deaeration from the suction circuit 5. During this time, the substrate sheet 13 side of the transfer sheet 11 is continuously heated by the heating device 4 (see FIG. 2).

  Next, the A mold 1 and the B mold 2 are clamped, and the molten resin 32 is injected into the molding space formed by the cavity forming surfaces 7 and 8 from the injection port 3, and then the molten resin 32 is cooled. By solidifying, a molded and simultaneously decorated molded product 31 is formed. During this time, the substrate sheet 13 side of the transfer sheet 11 is continuously heated by the heating device 4 (see FIG. 3). In addition, when the heating time is sufficient, for example, 2 to 3 seconds, heating may be performed after the A mold 1 and the B mold 2 are clamped and after a while. That is, there are cases where the transfer sheet 11 is not heated when the mold is opened, but there is a step of heating the transfer sheet 11 at least when the mold is clamped.

  Next, the A mold 1 and the B mold 2 are opened. After the mold is opened, the molded product take-out device 41 enters the mold, adsorbs the simultaneously decorated decorative molded product 31, and the transfer sheet 11 is released from the clamp 6, which has been heated by the heating device 4 until now. Part 11 begins to be transferred into the mold (see FIG. 4).

  Next, the molded product simultaneous decorative molded product 31 is extracted from the mold by the molded product take-out device 41. At the same time, the transfer sheet 11, in which the portion of the pattern 12 for one shot is heated and softened in advance by the heating device 4, which is a heating plate, is positioned at a position facing the cavity forming surface 7 of the A mold 1. It is transferred so that the position with the pattern 12 for one shot matches. At this time, the pattern 12 for one shot to be transferred into the mold next time is arranged at a position facing the heating device 4, and the base sheet 13 side of the transfer sheet 11 at this location is heated by the heating device 4. (See FIG. 5).

  Using the simultaneous molding decorative mold of the present invention, continuous molding of a molded simultaneous decorative molded product 31 used as an exterior part of a mobile phone casing was performed (see FIGS. 1 to 5). Although an injection molding machine having a maximum mold clamping force of 50 tons with a mold opening / closing stroke of 250 mm was used, the molded product take-out device 41 could be inserted between the A mold 1 and the B mold 2 without difficulty. The transfer sheet 11 was transferred to the inside of the mold in a preheated state, and the molding cycle time could be suppressed to 20 seconds because the process for heating the transfer sheet 11 did not enter the molding cycle. There was no ink flow in the simultaneously molded decorative molded product 31.

<Comparative example>
Using a conventional simultaneous molding decorative mold, continuous molding of a molded simultaneous decorative molded product 31 used as an exterior part of a mobile phone casing was performed (see FIG. 8). The largest mold with a mold opening / closing stroke of 350 mm larger than that of the embodiment in order to put an integrated product of the heating device 4 and the molded product take-out device 41 between the A mold 1 and the B mold 2 without interference problems. An injection molding machine with a clamping force of 100 tons had to be used. Further, when the moving speed of the integrated product of the heating device 4 and the molded product take-out device 41 was increased, the deflection of the movable support 42 was visually confirmed, and there was a concern about mold damage due to contact between the mold and the integrated product. Therefore, the moving speed could not be increased as much as the example. Since the molding cycle includes a step of heating the transfer sheet 11 inside the mold, the molding cycle time was longer than that of the example, 35 seconds. A slight ink flow was observed in the molded simultaneous decorative molded product 31.

It is sectional drawing which shows one Example of the process of the manufacturing method of the shaping | molding simultaneous decorating molded product of this invention, and one Example of the metal mold | die for simultaneous decoration of this invention. It is sectional drawing which shows one Example of the process of the manufacturing method of the simultaneous decorating molded product of this invention. It is sectional drawing which shows one Example of the process of the manufacturing method of the simultaneous decorating molded product of this invention. It is sectional drawing which shows one Example of the process of the manufacturing method of the simultaneous decorating molded product of this invention. It is sectional drawing which shows one Example of the process of the manufacturing method of the simultaneous decorating molded product of this invention. It is sectional drawing which shows one Example of the transfer sheet which is an example of the decorating sheet used for the metal mold | die for simultaneous shaping | molding of this invention. It is sectional drawing which shows one Example of the metal mold | die for simultaneous shaping | molding decoration of this invention. It is sectional drawing which shows one Example of the metal mold | die for simultaneous shaping | molding decoration of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 A metal mold | die 2 B metal mold | die 3 Injection port 4 Heating device 5 Suction circuit 6 Clamp 7 Cavity formation surface 8 Cavity formation surface 11 Transfer sheet 12 Design for 1 shot 13 Base sheet 14 Decoration layer 15 Peeling protection layer 16 Design layer DESCRIPTION OF SYMBOLS 17 Adhesive layer 21 Decorating sheet supply apparatus 22 Supply roll 23 Feeding roll 24 Decorating sheet winding apparatus 25 Winding roll 26 Feeding roll 31 Molding simultaneous decorating molded article 32 Molten resin 41 Molded article taking-out apparatus 42 Movable support

Claims (7)

  A mold is provided with an A mold and a B mold having an injection port at a position opposite to the A mold, and a heating device is provided at least substantially on the same plane as the cavity forming surface of the A mold or the B mold. Mold for simultaneous decorating.   The mold for simultaneous decorating of claim 1, wherein the heating device is a heating plate.   The mold for simultaneous decorating of claim 1, wherein the heating device is a heated gas blowing device.   The mold for simultaneous decorating according to any one of claims 1 to 3, wherein the mold provided with the heating device also includes a suction circuit.   It is equipped with the metal mold | die for decorating simultaneously in any one of Claims 1-4, and a decorating sheet supply apparatus, and a heating apparatus exists between the feed roll of a cavity formation surface and a decorating sheet supply apparatus. A molding simultaneous decorating device.   A mold for simultaneous molding and decoration, a decorative sheet supply device according to any one of claims 1 to 4, and a decorative sheet in which symbols for one shot are arranged at regular intervals, and a heating device forms a cavity. A molding simultaneous decorating device, characterized in that it is between the surface and the feeding roll of the decorative sheet supply device, and the distance between the heating device and the cavity forming surface is substantially the same as the interval between the patterns for one shot.   Using the mold for simultaneous decorating according to any one of claims 1 to 4 or the molding simultaneous decorating apparatus according to claim 5 or 6, the base sheet side is heated and softened in advance at least during mold clamping. After the mold is opened, the decorative sheet is transferred to at least the cavity forming surface of the A mold or B mold, and then the mold is clamped, and the molten resin is injected into the molding space formed by the cavity forming surface. A method of manufacturing a simultaneously decorated molded product.

Images