JP4472548B2 - Mold for simultaneous double-sided decorative molding and manufacturing method for double-sided decorative molded product - Google Patents

Description

  The present invention is for simultaneous double-sided decoration for manufacturing a resin molded product with decoration on both sides used for a protection panel of an electronic device display window for protecting the surface of a display device mounted on the electronic device. The present invention relates to a method for manufacturing a mold and a simultaneous double-sided decorative molded product.

  In the molding simultaneous decoration method, a decorative film with a decoration layer is placed on the base film between the fixed mold and the movable mold of the simultaneous molding mold, and the fixed mold and the movable mold are movable. In this method, molten resin is injected into a molding space formed by closing the mold with the side mold to form a resin molded product, and at the same time, a decorative layer is integrally bonded to the surface of the resin molded product. And recently, as disclosed in JP-A-6-99457 (Patent Document 1), from the need for improved design properties and improved physical properties of the resin molded product surface, not only one side of the resin molded product, The molding simultaneous double-sided decoration method, in which decorations are provided on both sides, is in the spotlight.

  In such a molding simultaneous double-side decoration method, molten resin is injected into a cavity defined by the mold in a state in which the mold is closed so as to sandwich two decorative films. At this time, it is necessary to inject a molten resin between the two decorative films, and in order to form a non-overlapping portion on the two decorative films, as shown in FIG. The decorative film 100 is arranged on each of the movable mold 121 and the fixed mold 222 so that the decorative film 110 on the fixed mold 202 side moves left and right. The molten resin is injected from a sprue 254 provided in a portion where the films 100 and 110 do not overlap, and the molten resin is fed into a molding space formed by the cavities 228 and 258 through the runner portion 256. .

Moreover, in the simultaneous molding double-sided decoration method, when the decorative films 100 and 110 are sandwiched between the inserts 220 and 250 when the mold is clamped, and the expansion and contraction of the decorative film is prevented, the decorative film is formed during injection molding. Problems such as wrinkles and decorative film tearing occur. In order to prevent this problem, a predetermined clearance A for passing the decorative films 100 and 110 through both the fixed-side mold and the movable-side mold is provided in the mold for simultaneous molding on both sides. (See FIG. 18A). This clearance A is configured to be approximately the thickness of the two decorative films so that the clamping force does not reach the two decorative films.
JP-A-6-99457

  However, in the vicinity of the cavities 228 and 258 of both molds, since the two decorative films 100 and 110 are arranged so as to overlap, the two decorative films are arranged in the clearance A without any gap. However, in the vicinity of the runner portion 256 for sending the molten resin 60 from the sprue 254 to the cavity, only one decorative film is disposed, and the clearance A creates a gap on the surface of the mold. (See FIGS. 18B and 19). As a result, the molten resin 60 leaks from the runner portion 256, and a resin burr 260d is likely to be generated around the runner portion 260c of the molded product 260 as shown in FIG. This resin burr 260d has become a cause of generating defective products by being mixed into the cavity in the process of continuously manufacturing the molded product.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a mold for simultaneous molding on both sides and a method for producing a molded simultaneous double-sided decorative molded product that can reduce resin burrs in the runner part. There is to do.

Therefore, the present inventor has made the following invention in order to solve the above problems. According to the first aspect of the present invention, the first cavity is formed, the first decorative film movable in the first direction passes over the first cavity, and the first cavity is formed. A first mold disposed parallel to the cavity forming surface;
A second cavity in which a second cavity is formed and a second decorative film movable in a second direction intersecting the first direction passes over the second cavity and the second cavity is formed A convex portion having a runner portion formed in a non-passing region of the second decorative film on the second cavity forming surface, which is disposed in parallel with the forming surface, and disposed opposite to the first mold. A second mold that is relatively close to and away from the first mold so as to be closed with the first mold;
When the first and second molds are closed, the upper surface of the convex portion and the first decorative film come close to each other, thereby preventing the molten resin from leaking to the runner portion. And a molten resin moving space for moving the molten resin so as to pass between the second decorative film, the molten resin is injected into the first and second cavities, and the first and second additive films are injected. While molding molded products with decorative films integrally bonded ,
The height of the convex portion formed in the non-passing region of the second decorative film of the second mold is substantially the same as the thickness of the second decorative film. Provide decorative molds.

Further, according to the second aspect of the present invention, the first mold having the first and second cavities forming surfaces in which the first and second cavities are formed and the mold having the second mold are used. In the method of manufacturing a molding simultaneous double-sided decorative molded product,
Disposing the first decorative film parallel to the first cavity forming surface so as to pass over the first cavity so that the first mold is movable in the first direction;
The second cavity forming surface has a runner portion for sending the molten resin to the cavity, and the convex portion is formed so as to surround the runner portion in the region directly facing the first decorative film when the second cavity forming surface is clamped. Parallel to the second cavity forming surface so that the second decorative film passes through the second cavity so as to be movable in the second direction intersecting the first direction on the formed second mold. And so as not to overlap the convex part,
The two molds are sandwiched between both molds, and the first mold and the second mold are closed,
By the mold clamping, in the region where only the first decorative film is provided, the upper surface of the convex portion and the first decorative film are brought into contact with each other,
When the molten resin is injected into the first and second cavities through the runner part, the second cavity forming surface and the first are brought into contact with the upper surface of the convex part and the first decorative film. The first and second decorative films are integrally bonded to the surface of the resin molded product at the same time as the resin molded product is formed while preventing the molten resin from leaking out of the runner portion from between the decorative film and the decorative film. As well as
When the height of the convex portion is substantially the same as the thickness of the second decorative film and the mold is clamped, the convex portion and the first decorative film are brought into contact with each other, and the second cavity forming surface And a method for producing a simultaneously molded double-sided decorative molded product in which the first decorative film and the first decorative film are in close contact with each other.

  The mold for simultaneous double-sided decoration of the present invention is provided with a runner portion for sending molten resin to the cavity. And at least the circumference | surroundings of the said runner part in the non-passing area | region of the 2nd decorative film except the passage area part of the 2nd decorative film arrange | positioned according to the said cavity are formed as a convex-shaped part, In the non-overlapping portion of the two decorative films in the gap formed between the molds, the upper surface of the convex portion and the first decorative film are brought close to each other to define the molten resin movement space. In the molten resin movement space, the upper surface of the convex portion and the first decorative film are close to each other, so that the molten resin can be prevented from leaking from the runner portion provided in the convex portion. Therefore, no resin flash occurs around the runner portion. Therefore, in the case of continuously producing simultaneously molded double-sided decorative molded products, it is possible to prevent the previously generated resin burrs from being mixed into the cavity and generating defective products.

  FIG. 1 is a diagram showing a schematic configuration of a molding simultaneous double-side decoration device on which a mold for simultaneous molding double-side decoration according to an embodiment of the present invention is mounted. As shown in FIG. 1, the simultaneous molding double-side decoration device 120 includes a movable platen 121 for mounting the movable mold 1, a fixed platen 122 for mounting the fixed mold 2, and a molding defined between both molds. An injection nozzle 125 for injecting molten resin into the working space is provided.

  In this embodiment, the fixed platen 122 is fixed to the gantry 126, and the movable platen 121 is guided by the tie bar 124 fixed to the fixed platen 122 so as to be detachable from the fixed platen 122.

  By moving the movable platen 121, the parting surface of the fixed mold 2 and the parting surface of the movable mold 1 are pressed against each other, and the second cavity 58 of the fixed mold 2 and the first of the movable mold 1 are brought into contact with each other. A mold closed state in which a molding space is defined by the cavity 28 and a mold open state in which the parting surfaces of both molds are separated from each other are obtained.

  Basically, a molding space is formed by the two molds using the fixed side mold 2 and the movable side mold 1. For example, an intermediate mold that is sandwiched between both molds to form the molding space. Additional members such as molds can also be used.

  The movable platen 121 is provided with a vertical film feeding device 127 and a vertical film winding device 128. The fixed platen 122 is also provided with a lateral film feeding device and a lateral film winding device (not shown).

  The vertical film feeding device 127 and the vertical film winding device 128 move the first decorative film 100 in the vertical direction (vertical direction) with respect to the first cavity 28 of the movable mold 1. The horizontal film feeding device and the horizontal film winding device move the second decorative film 110 in a direction (horizontal direction) intersecting the first decorative film 100 with respect to the second cavity 58 of the fixed mold 2. Let

  The first decorative film 100 is moved in the vertical direction so as to be separated from and parallel to the parting surface of the movable mold 1. On the other hand, the second decorative film 110 is moved in the lateral direction so as to be separated from and parallel to the parting surface of the fixed mold 2. That is, the 1st and 2nd decorating films 100 and 110 are arrange | positioned so that it may cross | intersect between the movable side metal mold | die 1 and the fixed side metal mold | die 2, The intersection part is an overlap part of two sheets of decorating films. It becomes. The overlapping portion is formed in the vicinity of the molding space for both molds. Each decorative film is brought into close contact with the cavities of both molds by a suction mechanism (not shown), and in this state, molten resin is injected and, as will be described later, is passed between the decorative films and sent to the molding space. And used to decorate both sides of the injection molded body.

  The mounting positions of the film feeding device and the film winding device on the movable mold side and the fixed mold side are not limited to those shown in FIG. The vertical film feeding device 127 may be provided in the lower part of the movable platen 121, and the vertical film winding device 128 may be provided in the upper part of the movable platen 121. Alternatively, the film delivery device 127 and the film take-up device 128 on the movable mold side are attached to the left and right sides, and the film delivery device and the film take-up device on the fixed mold side are attached to the upper part or the lower part of the fixed platen 122. Also good. Further, the film feeding device and the film winding device may be directly attached to the gantry.

  That is, the first and second decorative films 100 and 110 are subjected to a mold parting surface (parting surface of the fixed side mold 2 or parting surface of the movable side mold 1) before performing simultaneous double-side decoration on the molding. It is sufficient that the decorative films 100 and 110 can be moved so that the decorative films 100 and 110 can be moved so as to intersect with each other.

  Next, the decorative film will be described. As shown in FIG. 2A, the first and second decorative films used in the simultaneous molding double-sided decoration device have different film feeding directions as described above, except that the orientations of the arranged patterns are different. And have the same layer structure. Therefore, hereinafter, the second decorative film will be described as an example. The second decorative film 110 is fed out so as to move on the parting surface of the fixed mold from the state of the roll wound up by the film feeding device, and after the simultaneous double-side decoration is performed, the film winding is performed. It is wound up into a roll by the device.

  As shown in FIG. 2B, the second decorative film 110 is provided with patterns 131 at intervals in the longitudinal direction. The 2nd decoration film 110 is provided with the base film 135 and the decoration layer 132, and the decoration layer 132 is provided with the peeling protection layer 134 and the pattern ink layer 131a which comprises the pattern 131 on it. In addition, an adhesive layer 133 is provided on the design ink layer 131a, and contacts and adheres to the molten resin at the time of simultaneous molding on both sides, so that the design ink layer 131a together with the release protective layer 134 and the base film 135 And the decorative layer 132 is transferred to the resin molded product 151.

  At the time of molding simultaneous transfer, the first and second decorative films 100 and 110 in which the decorative layer 132 composed of the peeling protective layer 134, the design ink layer 131a, the adhesive layer 133, and the like are formed on the base film 135 are used. The first and second decorative films are sandwiched in a molding die, the resin is injected and filled in the cavity, and cooled to obtain a resin molded product. At the same time, the first and second decorative decorative films are provided on the surface. Then, the base film is peeled off, and the decoration layer 132 is transferred to each surface of the resin molded product 151 to perform decoration (see FIGS. 3A to 3C).

  As the material of the base film 135, a single layer film 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 a base film of a normal decorative film, such as a laminated film or a copolymer film made of two or more kinds of resins selected from the above, can be used.

  The thickness of the base film 135 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.

  When the peelability of the decorative layer 132 from the base film 135 is good, the decorative layer 132 may be provided directly on the base film 135. In order to improve the peelability of the decorative layer 132 from the base film 135, a release layer (not shown) may be formed on the entire surface before the decorative layer 132 is provided on the base film 135. The release layer is released from the decorative layer 132 together with the base film 135 when the base film 135 is peeled after the simultaneous double-side decoration, but in some cases, interlayer release occurs, and a part of the release layer 132 is provided. May remain on the outermost surface. The release layer material 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. Resins, olefin resins, acrylonitrile butadiene styrene resin release agents, composite release agents thereof, and the like can be used.

  The thickness of the release layer 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. As a method for forming the release layer, there are a coating method such as a roll coating method and a spray coating method, a printing method such as a gravure printing method and a screen printing method.

  The release protective layer 134 is formed entirely or partially on the base film 135 or the release layer. As shown in FIG. 4, when the base film 135 is peeled off after the simultaneous molding on both sides, the peeling protective layer 134 is peeled off from the base film 135 or the release layer to form the outermost surface of the molding simultaneous double-sided decorative molded product 150. It becomes.

  In addition, when the peeling protection layer 134 causes delamination, the delaminated surface is the outermost surface. Further, when the release layer causes interlayer release, the release layer remaining on the surface of the decorative layer 132 is the outermost surface of the simultaneous molding double-sided decorative molded product 150. The material of the release protection layer 134 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 hardness is required for the peeling protection layer 134, a photo-curing resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, a thermosetting resin, or the like may be selected and used.

  The thickness of the peeling protective layer 134 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 release protective layer 134 may be colored or uncolored. As a method for forming the peeling protective layer 134, there are 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 ink layer 131a is usually formed on the release protection layer 134 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 may be provided entirely or partially depending on the pattern to be expressed.

  The design ink layer 131a 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 used to express metallic luster as the design ink layer 131a, 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. As an example of forming a partial metal thin film layer, a solvent-soluble resin layer is formed on a portion that does not require the metal thin film layer, and then a metal thin film is formed on the entire surface, followed by solvent cleaning. There is a method of removing an unnecessary metal thin film together with a solvent-soluble resin layer. A solvent often used in this case is water or an aqueous solution. As another example, a metal thin film is formed on the entire surface, and then a resist layer is formed on a portion where the metal thin film is to be left, and after etching with acid or alkali, the remaining resist layer is removed. There is a way to do it. In addition, when providing a metal thin film layer, in order to improve the adhesiveness of another transfer layer and a metal thin film layer, you may provide a front anchor layer and a rear anchor layer. As the material of the front anchor layer and the rear anchor layer, two-component cured urethane resin, thermosetting urethane resin, melamine resin, cellulose ester resin, chlorine-containing rubber resin, chlorine-containing vinyl resin, polyacrylic resin, It is preferable to use an epoxy resin, a vinyl copolymer resin, or the like. Examples of methods for forming the front anchor layer and the rear anchor layer include coating methods such as gravure coating, roll coating, and comma coating, printing methods such as gravure printing, and screen printing.

  The film thickness of the pattern ink layer 131a is preferably 0.5 μm to 50 μm. When the film thickness is less than 0.5 μm, there is a problem that sufficient designability cannot be obtained, and when 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 133 adheres each of the above layers to the surface of the resin molded product 151. The adhesive layer 133 is formed on a portion to be bonded. That is, when the part to be bonded is the entire surface, the adhesive layer 133 is formed on the entire surface of the design ink layer 131a. When the part to be bonded is partial, the adhesive layer 133 is partially formed on the design ink layer 131a. As the adhesive layer 133, a heat-sensitive or pressure-sensitive resin suitable for the material of the resin molded product 151 is appropriately used. For example, when the material of the resin molded product 151 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 133 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.

  The configuration of the decorative layer 132 is not limited to the above-described embodiment. For example, when a material having excellent adhesiveness with the resin molded product 151 is used as the material of the design ink layer 131a, the decorative layer 132 is bonded. Layer 133 can be omitted.

  The resin molded product 151 may be transparent, translucent, or opaque. However, in order to decorate both surfaces of the resin molded product, it may be preferable to use a transparent one depending on the use of the resin molded product. Further, the resin molded product may be colored or not colored. Examples of the resin include thermoplastic resins such as acrylic resins, polycarbonate resins, styrene resins, polyamide resins, Noryl (trademark) resins, polyester resins, olefin resins, urethane resins, and acrylonitrile butadiene styrene resins. be able to. 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.

  Next, a method of decorating the surface of a resin molded product using a decorative film and utilizing the simultaneous molding method by injection molding will be described. 3A to 3C show a schematic resin flow for understanding the resin flow. First, as shown in FIG. 3A, the first and second decorative films 100 and 110 are intermittently fed into a molding die composed of a movable die 1 and a fixed die 2. In addition, when the first and second decorative films 100 and 110 are intermittently fed, the first and second decorative films 100 and 110 are detected by a sensor (not shown) after the positions of the first and second decorative films 100 and 110 are detected. If the decorative films 100, 110 are sandwiched and fixed between the movable mold 1 and the fixed mold 2, the first and second decorative films 100, 110 can always be fixed at the same position, The positional shift of the pattern ink layer 131a does not occur. As shown in FIG. 3B, after the molding dies 1 and 2 are closed, the molten resin is injected and filled into the cavity from the gate provided on the stationary mold 2 to form the resin molded product 151 at the same time. The first and second decorative films 100 and 110 are bonded to the surface. At this time, a coolant for cooling the molding spaces of both molds is supplied to the cavities of both molds 1 and 2 from the cooling water supply device 123 shown in FIG. The time required for molding can be shortened.

  Next, as shown in FIG. 3C, after the molding simultaneous double-sided decorative molded product 150 is cooled, the molding dies 1 and 2 are opened, and the molding simultaneous double-sided decorative molded product 150 is taken out. At this time, the first and second decorative films are integrally bonded to the resin molded product 151. Finally, by peeling off the base film 135, the decorative layer 132 remains on the surface of the injected resin molded product 151, and the simultaneous double-sided decoration is completed.

  Next, the molds 1 and 2 will be described. FIG. 5 is a perspective view showing a state in which the movable mold 1 and the fixed mold 2 according to the present embodiment are closed. Both molds 1 and 2 receive the clamping force by the clamping force receiving portions 10a and 10b in the joined state, and their contact surfaces function as parting surfaces. The molds 1 and 2 for simultaneous double-sided decoration are molds used in a simultaneous molding and double-sided decorating device that decorates both surfaces of a thin plate-shaped resin molded product simultaneously with molding.

  Hereinafter, the structure of each metal mold | die 1 and 2 is demonstrated. The movable side mold 1 and the fixed side mold 2 shown in FIG. 5 each have a nesting 20 provided with two molding cavities 28 and 58 into which the first and second decorative films 100 and 110 are to be inserted. , 50 and die sets 3, 4 for fixing the inserts 20, 50 (see FIGS. 6A and 9A).

  First, the fixed mold 2 will be described. As shown in FIGS. 6A, 6 </ b> B, and 7, the fixed mold 2 is inserted into a pocket 13 provided by recessing the surface of the fixed die set 4 that faces the other mold 1. Is inserted and fixed. For example, fixing screws (not shown) can be used to fix the insert 50. When the insert 50 is fixed with a fixing screw, it is preferable to provide a screw hole on the surface of the peripheral wall 6b of the pocket 13 of the die set 4 that does not face the movable mold 1. In the fixed side mold 2, the peripheral wall 6 b of the pocket 13 of the die set 4 constitutes a mold clamping force receiving portion 10 b that functions as a parting surface that comes into contact with the movable side mold 1 in the mold closed state. In addition, two clamps 12 that hold the second decorative film 110 are attached to the insert 50.

  As will be described later, the nest 50 is provided with a second cavity 58 on the second cavity forming surface 51, and the back surface of the cavity forming surface 51 is configured to be smooth, and when the nest 50 is attached to the die set 4. It contacts the mounting surface in the pocket 13 of the die set 4.

  Guide pins 11 are provided at the four corners of the opposing surface of the die set 4 in order to make the clamping position with the movable mold constant.

  As shown in FIG. 6A, the clamp 12 is for holding the second decorative film 110 so as to press against the second cavity forming surface 51 of the insert 50, and the longitudinal direction of the second decorative film 110. It extends in a direction orthogonal to the two and is arranged so as to be parallel to each other. As shown in FIG. 7, each clamp 12 includes an elongated plate-like film pressing portion and two leg portions respectively suspended from both ends of the film pressing portion. The leg portion passes through the through hole 51b for clamping provided in the insert 50, and is inserted into the insertion hole 12a for clamping provided on the mounting surface of the die set 4 while being fixed to the die set 4. The die set 4 is provided with a clamp moving mechanism 5b (see FIG. 5) that is connected to a leg portion of the clamp inserted into the clamp insertion hole 12a and moves the clamp 12 up and down. Thus, the holding and opening of the second decorative film 110 can be switched.

  When the clamp 12 is raised, the second decorative film 110 is released from the clamp 12 and is movable in the longitudinal direction. On the other hand, when the clamp 12 is lowered, the second decorative film 110 is pressed against the second cavity forming surface 51 of the insert 50 by the clamp, and the position is held. When the clamp is raised, the molds 1 and 2 are mainly in the open state, and the second decorative film 110 is fed. When the clamp is lowered, the second This is a case where the second decorative film 110 needs to be held at the position, for example, when the alignment of the decorative film 110 is finished and the mold is closed and the molten resin is injected.

  Next, the nesting used for the stationary mold 2 will be described. As shown in FIGS. 6B and 7, the insert 50 is a flat plate-like body, and one surface of the flat surface is a second cavity forming surface 51 in which the second cavity 58 is formed, and the other surface. Constitutes a fixed surface when attached to the die set 4. On the second cavity forming surface 51, runner portions 55 and 56 for feeding the molten resin into the second cavity 58 and sprue 54 for feeding the molten resin injected from the injection nozzle 125 to the second cavity forming surface 51 side. Is provided.

  The second cavity forming surface 51 of the insert 50 is cut to a position facing the clamp 16 so as not to interfere with the clamp 16 of the movable mold 1 when the movable mold 1 and the fixed mold 2 are closed. Notch 53 is provided

  Molten resin is injected into the second cavity 58 through the sprue bush 14 provided in the pocket 13 of the die set 4 and the sprue 54 of the insert 50. As shown to FIG. 6B, it is comprised on the 2nd cavity formation surface 51 of the fixed side metal mold | die 2 so that the 2nd decorating film 110 may pass a horizontal direction, and the said 2nd decorating film 110 passes. The region is a second decorative film passage region 9a. On the other hand, the region through which the second decorative film 110 does not pass is a second decorative film non-passing region 9b. The second cavity 58 is provided in the second decorative film passing area 9a, and the sprue 54 is provided in the second decorative film non-passing area 9b. Accordingly, the runner portions 55, 56, 57 connecting the sprue 54 and the second cavity 58 have a portion 57 in the second decorative film passage region 9a and a remaining portion 55, 56 in the second decorative film non-passage region. 9b.

  Further, as described above, the through holes 51b for clamping are respectively provided in the corner portions of the insert 50, and the leg portions of the clamps are inserted respectively. Further, a suction hole (not shown) communicating with the second cavity forming surface 51 is provided on the back surface (fixed surface), and when the second decorative film 110 is attached to the die set 4 as will be described later. Suction is performed on the second cavity forming surface 51 of the insert 50.

  The area | region where the sprue 54 and the runner parts 55 and 56 of the 2nd cavity formation surface 51 are provided comprises the convex-shaped part 52a. As shown in FIG. 8C, the convex portion 52a is provided only in the second decorative film non-passing region 9b, and its height dimension D1 is substantially equal to the thickness dimension D2 of the second decorative film 110. It is configured as follows.

  The convex part 52a is formed by inserting the convex part forming block 52 into the insertion hole 51a provided so as to penetrate the second decorative film non-passing region 9b of the nested part 50. The thickness dimension of the convex forming block 52 is configured to be slightly thicker than the thickness dimension of the insert 50, and the difference in the thickness dimension is the height dimension D1 of the convex portion 52a. For example, when it is desired to adjust the height D1 of the convex portion 52a, the height can be adjusted by cutting the convex portion forming block 52 or sandwiching a thin film or the like in the insertion hole 51a of the convex portion forming block 52. .

  As shown in FIGS. 8A and 8B, an ejector pin 59 for taking out the molded simultaneous double-sided decorative resin molded product 150 after molding is inserted in the middle of the runner portion 56 provided in the convex forming block 52. Insertion hole 59a is provided. The ejector pin 59 extends through the insertion hole 30 shown in FIG. 7 provided in the pocket of the die set 4 and is connected to a driving unit (not shown) provided in the die set 4. The molded simultaneous double-sided decorative molded product 150 can be taken out by driving the drive unit so that the ejector pin 59 protrudes from the runner unit 56 and starts the molded product from the second cavity 58.

  Next, the die set 4 used for the fixed mold 2 will be described. As shown in FIGS. 6A and 7, the fixed die set 4 is formed with a connecting portion for fixing the molding simultaneous double-side decorating device 120 to the stationary platen 122 and a pocket 13 for inserting the insert 50. A fixed portion. A mechanism for driving the clamp 12 and the ejector pin 59 provided in the insert 50 is mounted on the connecting portion.

  Next, the movable mold 1 will be described. As shown in FIGS. 9A and 9B, the movable die 1 is inserted into a pocket 17 provided by recessing the surface of the movable die set 3 facing the fixed die 2. And a fixed configuration. For example, a fixing screw (not shown) can be used to fix the insert 20. When the nesting is fixed with a fixing screw, it is preferable to provide a screw hole on the surface of the peripheral wall 6a of the pocket 17 of the movable die set 3 that does not face the fixed die 2. In the movable mold 1, the peripheral wall 6 a of the pocket 17 of the die set 3 constitutes a mold clamping force receiving portion 10 a that functions as a parting surface that comes into contact with the fixed mold 2 when the mold is closed. In addition, two clamps 16 that hold the first decorative film 100 are attached to the insert 20.

  As will be described later, the nest 20 is provided with a first cavity 28 on the first cavity forming surface 21, and the back surface of the first cavity forming surface 21 is configured to be smooth, and when the nest 20 is attached to the die set 3. It contacts the mounting surface in the pocket 17 of the die set 3.

  At the four corners of the opposing surface of the die set 3, guide pins 11 of a fixed mold are inserted during mold clamping, and guide bushes 15 are provided for making the mold clamping position constant.

  As shown in FIG. 9B, the clamp 16 is for holding the first decorative film 100 so as to be pressed against the first cavity forming surface 21 of the insert 20, and in the longitudinal direction of the first decorative film 100. It extends in the direction orthogonal to the two, and is arranged so as to be parallel to each other. As shown in FIG. 9B, each clamp 16 includes an elongated plate-like film pressing portion and two leg portions respectively suspended from both ends of the film pressing portion. The leg portion passes through the through hole 29 for clamping provided in the insert 20 and is inserted into the insertion hole 16 a for clamping provided on the mounting surface of the die set 3 while being fixed to the die set 3. The die set 3 is provided with a clamp moving mechanism 5a (see FIG. 5) for connecting the leg 16 of the clamp 16 inserted into the clamp insertion hole 16a and moving the clamp 16 up and down. The first decorative film 100 can be switched between holding and opening up and down.

  When the clamp 16 is raised, the first decorative film 100 is released from the clamp 16 and is movable in the longitudinal direction. On the other hand, when the clamp 16 is lowered, the first decorative film 100 is pressed against the first cavity forming surface 21 of the insert 20 by the clamp 16 and the position thereof is maintained. When the clamp 16 is raised, both molds are mainly in an open state and the first decorative film 100 is fed. When the clamp is lowered, the first decoration This is a case where the first decorative film 100 needs to be held at the position, for example, when the alignment of the film 100 is finished and the molds 1 and 2 are closed and the molten resin is injected.

  Next, the insert 20 used for the movable mold 1 will be described. As shown in FIGS. 9A and 9B, the insert 20 is a flat plate-like body, and one surface of the flat surface is a first cavity forming surface 21 in which a first cavity 28 is formed, and the other surface. Constitutes a fixed surface when attached to the die set 3. The first cavity forming surface 21 is provided with a groove 25 for reliably feeding the molten resin injected at a high pressure from the sprue 54 of the fixed mold 2 into the two decorative films 100 and 110. The groove 25 is provided at a position facing the runner portion 55 of the fixed mold 2 in the mold closed state.

  The first cavity forming surface 21 of the insert 20 is cut to a position facing the clamp 12 so as not to interfere with the clamp 12 of the fixed mold 2 when the movable mold 1 and the fixed mold 2 are closed. A notch 23 is provided.

  As shown to FIG. 9A, on the 1st cavity formation surface 21 of the movable side metal mold | die 1, it is comprised so that the 1st decorating film 100 may pass in the vertical direction, and the said 1st decorating film 100 passes. The region is a first decorative film passage region 19a. On the other hand, the region where the first decorative film 100 does not pass is a first decorative film non-passing region 19b. The first cavity 28 needs to be provided in the first decorative film passage region 19a.

  Further, as described above, the through holes 29 for clamping are respectively provided in the corner portions of the insert 20, and the leg portions of the clamps 16 are respectively inserted therein. Further, a suction hole (not shown) communicating with the first cavity forming surface 21 is provided on the back surface (fixed surface), and when the first decorative film 100 is attached to the die set 3 as will be described later. Suction is performed on the first cavity forming surface 21 of the insert 20.

  Next, the die set 3 used for the movable mold 1 will be described. As shown in FIGS. 9A and 9B, the movable die set 3 is formed with a connecting portion for fixing the movable simultaneous decorating device 120 to the movable platen 121 and a pocket 17 for inserting the insert 20. Provided with a fixed part. A mechanism for driving the clamp 16 provided in the insert 20 is mounted on the connecting portion.

  Next, the process for producing a molded simultaneous double-sided decorative molded product using the molds 1 and 2 according to the above embodiment will be described. FIG. 10 is a perspective view conceptually showing a positional relationship between the mold for simultaneous molding on both sides of FIG. 5 and the first and second decorative films 100 and 110. In FIG. 10, only the nestings 20 and 50 of the respective molds 1 and 2 are shown for easy understanding, but in actuality, the molds are fixed to the die sets 3 and 4 so Needless to say, it is attached to the decoration device 120.

  In the mold according to the above-described embodiment, the movable side mold 1 in which the first decorative film 100 is arranged to be movable in the vertical direction and the fixed that the second decorative film 110 is arranged to be movable in the horizontal direction. The side mold 2 is arranged so that the first and second cavity forming surfaces 21 and 51 provided in the respective inserts 20 and 50 face each other.

  By moving the movable mold 1 so as to approach the fixed mold 2, the mold clamping force receiving portions 10 a and 10 b of both the die sets 3 and 4 come into contact with each other and the mold is closed. In the mold closed state, the first decorative film 100 disposed on the movable mold 1 and the second decorative film 110 disposed on the fixed mold 2 at positions facing both the inserts 20 and 50. A clearance L is formed between them (see FIG. 11). In the present embodiment, the first and second cavity forming surfaces of the two nestings 20 and 50 rather than the clamping force receiving portions 10a and 10b of the peripheral walls 6a and 6b of the die sets 3 and 4 of the dies 1 and 2 are used. 21 and 51 are configured to be slightly lower when viewed from the mold clamping force receiving portions 10a and 10b, which are parting surfaces, so that a clearance L is formed when both molds 1 and 2 are closed.

  The dimension of the clearance L should just be a dimension which the mold clamping force of both the metal mold | dies 1 and 2 does not reach the 1st and 2nd decorative films 100 and 110, for example, the 1st and 2nd decorative films 100 , 110 can be approximately the same size as the thickness when they overlap.

  Further, the height dimension of the convex portion 52 a provided on the second cavity forming surface 51 of the fixed-side mold 2 is configured to be approximately the same as the thickness of the second decorative film 110 disposed on the fixed-side mold 2. Therefore, there is almost no gap between the first decorative film 100 arranged on the movable mold 1 and the upper surface 52b of the convex part 52a of the fixed mold 2 during mold clamping (see FIG. 11).

  As shown in FIGS. 12 and 14, the convex portion 52 a of the fixed mold 2 is provided with runner portions 55 and 56, so that the molten resin injected through the sprue 54 is 1 is sent to the first and second cavities 28 and 58 through the molten resin moving space 56a surrounded by the decorative film 100 and the runner portions 55 and 56, and in the portion of the runner portion 57, the first and first 2 The first and second cavities 28 and 58 are reached through between the decorative films 100 and 110. Further, as described above, since the surface of the convex portion 52a is in contact with the first decorative film 100 without a gap, the molten resin 60 may leak from the molten resin movement space 56a as shown in FIG. No resin burrs are generated around the runner portions 55 and 56.

  As shown in FIG. 15, after the molten resin 60 filled in the first and second cavities 28 and 58 is solidified by cooling, the movable mold 1 is separated from the fixed mold 2 and the mold is opened. Become. Thereafter, the molded product 150 a is released from the fixed mold 2. At this time, in order to release the molded product 150a, the ejector pin 59 is ejected by driving the drive unit provided in the die set 4 of the fixed mold 2 to take out the molded product 150a. The molded product 150a which has been released from the mold can be obtained by cutting a portion corresponding to the runner portion to obtain a molded simultaneous double-sided decorated molded product 150 in which both sides are decorated.

  FIG. 16A and FIG. 16B are diagrams showing a configuration of a nesting used in a fixed mold of a mold according to another embodiment of the present invention. The nesting 50a on the fixed mold side according to the present embodiment is almost entirely in the second decorative film non-passing region 9b, which is a portion excluding the second decorative film passing region 9a through which the second decorative film 110 passes. The configuration is substantially the same as the nesting 50 on the fixed mold side according to the first embodiment except that a convex portion 52b configured integrally with the nesting 50a is provided. By comprising in this way, the convex part 52b can be formed by grind | polishing the part of the 2nd decoration film passage area | region 9a of a nesting, the cavity 58a is formed in the said grinding | polishing part, What is necessary is just to provide the runner parts 56a and 57 so that a sprue may be connected. Therefore, the nest 50a can be easily manufactured.

  In addition, this invention is not limited to the said embodiment, It can implement with another various aspect. For example, in the present embodiment, a sprue is provided in which a nozzle for injecting molten resin is disposed on the fixed mold side, but this is performed using a vertical molding machine that attaches a sprue on the movable mold side. You can also

  In addition, each mold is not limited to a configuration in which a nest is fitted in a pocket provided in the die set, and in the mold closed state, a decorative film is passed between the cavity forming surfaces of the molds 1 and 2. The configuration is not particularly limited as long as the gap is formed.

  It is to be noted that, by appropriately combining arbitrary embodiments of the various embodiments described above, the effects possessed by them can be produced.

It is a figure which shows schematic structure of the shaping | molding simultaneous double-sided decoration apparatus with which the metal mold | die for simultaneous shaping | molding simultaneous double-sided decoration concerning embodiment of this invention is mounted. It is a figure which shows the external appearance structure of the decorating film used in the shaping | molding simultaneous double-sided decorating apparatus of FIG. It is IIB-IIB sectional schematic of FIG. 2A. It is a schematic diagram which shows the process of the shaping | molding simultaneous double-sided decoration in the shaping | molding simultaneous double-sided decoration apparatus of FIG. It is a schematic diagram which shows the process of the shaping | molding simultaneous double-sided decoration in the shaping | molding simultaneous double-sided decoration apparatus of FIG. It is a schematic diagram which shows the process of the shaping | molding simultaneous double-sided decoration in the shaping | molding simultaneous double-sided decoration apparatus of FIG. It is a figure which shows the cross-sectional structure of the shaping | molding simultaneous double-sided decoration molded product shape | molded by the shaping | molding simultaneous double-sided decoration method. It is a perspective view which shows the joining state of the movable side metal mold | die and fixed side metal mold | die which comprise the metal mold | die for simultaneous molding double-sided decoration concerning embodiment of this invention. It is a perspective view which shows the structure of the stationary-side metal mold | die used for the metal mold | die for simultaneous molding on both surfaces of FIG. It is a top view which shows the structure of the stationary-side metal mold | die of FIG. 6A. It is an assembly exploded perspective view of the fixed side mold of the mold for simultaneous double-side decorating of FIG. 6A. It is a perspective view which shows the structure of the convex part formation block of the stationary-side metal mold | die of the shaping | molding simultaneous double-sided decoration metal mold | die of FIG. 6A. It is a top view which shows the structure of the convex part formation block of the stationary-side metal mold | die of the shaping | molding simultaneous double-sided decoration metal mold | die of FIG. 6A. It is a partial expansion perspective view at the time of inserting a convex-part formation block into the nest | insert of the metal mold | die for simultaneous molding double-sided decoration of FIG. 6A. It is a perspective view which shows the structure of the movable side metal mold | die used for the shaping | molding simultaneous double-sided decoration metal mold | die of FIG. It is an assembly disassembled perspective view of the movable side metal mold | die of the shaping | molding simultaneous double-sided decoration metal mold | die of FIG. 9A. It is a perspective view which shows notionally the positional relationship of the metal mold | die for simultaneous shaping | molding double-sided decoration of FIG. 5, and a 1st and 2nd decorating film. It is sectional drawing which cut | disconnected the metal mold | die for simultaneous molding double-sided decoration of FIG. 5 in the closed state by line XI-XI of FIG. 8C. It is sectional drawing which cut | disconnected the metal mold | die for simultaneous molding double-sided decoration of FIG. 5 in a mold closed state by the line XII-XII of FIG. 8C. FIG. 12 is a diagram showing a state where molten resin is injected in the cross-sectional view of FIG. 11. FIG. 13 is a diagram showing a state where molten resin is injected in the cross-sectional view of FIG. 12. In sectional drawing of FIG. 12, it is a figure which shows the state which takes out a molded article in a mold open state. It is a top view which shows the structure of the nest | insert for fixed side molds used for the metal mold | die for simultaneous molding double-sided decoration concerning 2nd Embodiment of this invention. It is sectional drawing of line XVIB-XVIB of FIG. 16A in the state which the decoration film has arrange | positioned. It is a perspective view which shows the typical structure of the conventional metal mold | die for simultaneous double-sided decoration. It is sectional drawing of the metal mold | die for simultaneous molding double-sided decoration of FIG. 17 in a mold open state. It is sectional drawing of the metal mold | die for simultaneous molding double-sided decoration of FIG. 17 in a mold closed state. It is the elements on larger scale of FIG. 18B. It is a figure which shows typically the molded product shape | molded with the metal mold | die for simultaneous molding on both surfaces of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable side metal mold 2 Fixed side metal mold 3 Movable side die set 4 Fixed side die set 9a Second decorative film passage area 9b Second decorative film non-passage area 12, 16 Clamp 13, 17 Pocket 20, 50 Nest 21 1st cavity formation surface 28 1st cavity 51 2nd cavity formation surface 51a Insertion hole 52 Convex part formation block 52a Convex part 54 Sprue 55, 56, 57 Runner part 58 2nd cavity 59 Ejector pin 100 1st decorating film 110 2nd decorative film 150 Double-sided decorative molded product

Claims (2)

The first cavity (28) is formed, and the first decorative film (100) movable in the first direction passes over the first cavity (28) to form the first cavity (28). A first mold (1) disposed parallel to the first cavity forming surface (21);
A second decorative film (110) in which a second cavity (58) is formed and movable in a second direction intersecting the first direction passes over the second cavity (58) and the second In a non-passing region (9b) of the second decorative film (110) of the second cavity forming surface (51), which is arranged in parallel to the second cavity forming surface (51) where the cavity (58) is formed. , Having a convex part (52a) formed with runner parts (55, 56), opposed to the first mold and relative to the first mold so as to be closed with the first mold. A second mold (2) that can be brought into and out of contact with each other,
When the first and second molds (1, 2) are closed, the runner portion (55) is brought into contact with the upper surface of the convex portion (52a) and the first decorative film (100). 56), a molten resin movement space (56a) for moving the molten resin so as to pass between the first and second decorative films (100, 110) while preventing leakage of the molten resin is formed, Injecting the molten resin into the first and second cavities (28, 58) to form a molded product in which the first and second decorative films (100, 110) are integrally bonded,
The height (D1) of the convex part (52a) formed in the non-passing region (9b) of the second decorative film of the second mold (2) is the second decorative film (110). molding simultaneous double-side decorating mold for the thickness (D2) is configured in the same. A first mold (1) and a second mold (2) having first and second cavity forming surfaces (21, 51) in which first and second cavities (28, 58) are formed, respectively. In a method of manufacturing a simultaneous double-sided decorative molded product using a mold,
Parallel to the first cavity forming surface (21) so that the first decorative film (100) passes over the first cavity (28) so that the first mold (1) can move in the first direction. Placed in
A runner part (55, 56, 57) for sending the molten resin to the cavity has a second cavity forming surface (51), and the first decorative film (100) is clamped when the second cavity forming surface (51) is clamped. In a second direction intersecting the first direction on the second mold (2) in which the convex part (52a) is formed so as to surround the runner part (55, 56) in the region directly facing The second decorative film (110) is movably parallel to the second cavity forming surface (51) and does not overlap the convex portion (52a) so as to pass over the second cavity (58). Place and
The first mold (1) and the second mold (2) are closed so that the two decorative films are sandwiched between both molds,
In the region where only the first decorative film (100) is provided by the clamping, the upper surface of the convex portion (52a) and the first decorative film (100) are brought into contact with each other,
When the molten resin is injected into the first and second cavities (28, 58) via the runner portions (55, 56, 57), the upper surface of the convex portion (52a) and the first decoration Resin while preventing the molten resin from leaking out of the runner part from between the second cavity forming surface (51) and the first decorative film (100) by contact with the film (100) At the same time as forming the molded product, the first and second decorative films (100, 110) are integrally bonded to the surface of the resin molded product,
In the thickness dimension (D2) and the same height dimension (D1) of the second decoration film of the convex portion (52a) (110), the said convex portion (52a) when the mold clamping A method for producing a molded simultaneous double-sided decorative molded product in which a first decorative film (100) is brought into contact, and the second cavity forming surface (51) and the first decorative film (100) are in close contact with each other.

Images