JP3336246B2 - Injection molding simultaneous painting apparatus and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method in which a painted sheet is integrally adhered to the surface of an injection molded resin article in a mold at the same time as injection molding to obtain a molded article on which patterns, characters, etc. are applied. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous painting apparatus and method, and more particularly, to an improved hot plate used to heat and soften a painted sheet before stretching (preforming) the painted sheet effectively.

[0002]

2. Description of the Related Art Several methods have been proposed for simultaneous injection molding and painting methods in which a painting sheet is integrally adhered to the surface of an injection resin molded article simultaneously with injection molding.
Most of them are arranged so that all or some of the following steps (a) to (i) are performed in the stated order or permuted, and the steps are sequentially performed or a plurality of steps are simultaneously performed in parallel or in parallel. (Japanese Patent Publication No. 50-19132, Jitsuhei 3
-56344, JP-B-7-41637, etc.).

(A) A sheet supply step of supplying a picture sheet onto a female parting surface used for injection molding. (B) a clamping step of fixing and holding the painted sheet on the female parting surface; (C) A heating softening step of heating and softening the painted sheet with a hot platen or the like. (D) A stretching step (preliminary molding step) of stretching the painted sheet along the female cavity by vacuum suction and / or air supply. (E) A mold clamping step of moving one of the female mold and the male mold (usually a female mold) to the other (usually a male mold) to clamp the mold.

(F) An injection molding step of injecting and filling a resin (molten resin or the like) in a fluid state from the male mold side into a cavity formed between the female mold and the male mold, solidifying the resin, and performing injection molding. (G) A mold opening step of separating the female mold and the male mold. (H) A sheet trimming step of separating a portion of the painted sheet to be attached to the injection resin molded body from another portion (excess portion). (I) A take-out step of taking out the laminated product on which the painted sheet is adhesively laminated from both the male and female molds.

[0005] Simultaneously performing a plurality of steps simultaneously means that a plurality of steps are included in one step. For example, in the mold clamping step (e), the painted sheet is divided into a female type and a male type. If it is not fixed and held between them, the clamping step (b) is performed simultaneously with the mold clamping step, and the painted sheet is used in the injection molding step (f). If the stretching is performed by the heat and pressure of the injected molten resin, this means that the stretching step (d) is performed simultaneously with the injection molding step.

[0006] As the painting sheet, either a laminated sheet (laminated sheet) or a transfer sheet is used depending on the product type. In the case of a laminated sheet, painting is performed as it is by injection molding. That is, all the layers of the sheet are bonded and integrated with the surface of the injection resin molded body to form a decorative layer. On the other hand, when the painting sheet is a transfer sheet, the support sheet of the painting sheet integrated with the surface of the injection resin molded body is peeled off, and only the transfer layer such as the decoration layer remains on the injection resin molding body side. Then, the painting is completed by forming a decorative layer.

[0007]

By the way, in the injection molding simultaneous painting apparatus for performing simultaneous injection molding painting as described above, depending on the shape of the laminated product (product) to be obtained,
In some cases, the parting surface has to be entirely convex or concave. That is, for example, when obtaining a product having a large curvature (such as a deep drawing shape),
When the painted sheet fixed and held on the flat parting surface is stretched along the cavity of the deep drawing shape, the amount of displacement and the amount of distortion during stretching of the painted sheet become large, and the painted sheet becomes wrinkled and distorted. , Tears, etc. easily occur,
In order to avoid this, if the molding conditions such as heat and pressure are relaxed, wrinkles, distortions, tears, etc. do not occur, but it becomes difficult to completely adhere the painted sheet along the cavities. In order to solve such a problem, for example, as described in Japanese Patent Application Laid-Open No. 9-39025, the female parting surface is generally convex or concave in accordance with the product shape to be obtained. It is considered that even when a product having a large curvature (such as a deep drawing shape) is obtained as a curved surface, it is not necessary to make the cavity so deep (depth from the parting surface) [described later]. FIG. 2 showing an embodiment of the present invention. In FIG.
Reference numeral 2 denotes a female part, and reference numeral 14 denotes a convex parting surface. ].

However, as described above, when the female parting surface is entirely a convex or concave curved surface,
The shape of the hot plate for performing the heating and softening step (c) becomes a problem. That is, conventionally, the heating plate is generally heated by infrared radiation, usually (1)
Flat type (for example, see Japanese Patent Publication No. 63-6339, JP-A-5-301250, etc.), (2) a curved surface and a polyhedral type having a shape corresponding to the shape of a molded product to be obtained (the applicant of the present application) (See JP-A-7-227827) and (3) Flexible sheet type (using a flexible surface heating element) (see JP-A-8-39602 by the applicant of the present application). ing. However, in the conventional plate-type hot plate of (1), the curved and polyhedral type hot plate of (2), and the flexible sheet type hot plate of (3), There was a problem.

That is, in the flat type of (1),
When the female parting surface is, for example, a convex curved surface having a substantially "C" shape in side view, the female parting surface is held and fixed to the heating surface of the flat platen hot plate and the convex curved surface. The separation distance from each part of the painting sheet greatly varies, and the distribution range of the separation distance becomes large. In other words, since the hot platen is of a flat plate type, in the painted sheet, the vicinity of the top of the convex curved surface is close to the heating surface of the hot platen, but the bottom (foot side) of the convex curved surface is hot. It is far away from the heated surface of the board. In other words, the difference between the maximum separation distance and the minimum separation distance between the painting sheet and the heating surface of the hot platen becomes extremely large, and when the difference becomes large, the heating temperature distribution of the painting sheet becomes non-uniform (the distribution range is large), The amount of stretching in each part of the painted sheet varies, resulting in distortion of the picture pattern, misalignment between the picture pattern and the molded body, and, in extreme cases, wrinkles and tears in the painted sheet.

On the other hand, in the case of the curved surface and the polyhedral type of the above (2), the difference between the maximum separation distance and the minimum separation distance between the painting sheet and the heating surface of the hot platen can be reduced, so that the heating temperature distribution of the painting sheet is reduced. Can be made uniform as compared with the flat plate type, but the hot plate (heating surface) must be manufactured and processed into a three-dimensional shape (three-dimensional shape). The weight is greatly increased as compared with the flat type, and as a driving means such as a fluid pressure cylinder for holding the hot plate and moving between the standby position and the sheet heating position, a large and large capacity Must be used, which is disadvantageous in terms of installation space and equipment costs, and its outer shape (heating surface)
It is necessary to correspond to the shape of the molded product to be obtained (the shape of the female cavity), but since it is impossible to change the outer shape, the corresponding range for the dimensions and shape of the molded product to be obtained is narrow (basically, Only one type of molded product is supported), and each time the dimensions and shape of the molded product change, a new product corresponding to the change must be made, resulting in a problem that the initial cost increases.

In the case of the flexible sheet type of (3), the above-mentioned problems can be solved to some extent.
The driving means for holding and guiding the flexible sheet type hot plate and moving it between the standby position and the sheet heating position (inside of the three-dimensional type clamper) becomes complicated and large-scale, so that the equipment cost increases and the flexibility increases. It is necessary to repeatedly deform the hot plate using the flexible surface heating element every shot, so that the surface heating element is likely to be broken due to fatigue or the like, and the bending of the flexible surface heating element. There is a problem that a molded product having an uneven step or a curvature exceeding the limit cannot be properly handled.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a printed sheet having a female parting surface having a convex curved surface. In the heating and softening step, the heating temperature distribution of the painted sheet can be made as uniform as possible as compared with the conventional flat type hot plate, and it is simpler and lighter than the conventional curved and polyhedral type hot plate. In addition to cost reduction and cost reduction, it is possible to expand the range of the size and shape of the molded product to be obtained. The present invention provides an injection molding simultaneous painting apparatus with an improved hot platen and an injection molding simultaneous painting method using the same, which can be moved between a standby position and a sheet heating position by a driving means having a simple structure. Sometimes.

[0013]

In order to achieve the above-mentioned object, an injection molding simultaneous painting apparatus according to the present invention basically has a female parting surface having a convex curved surface and a side view. It is characterized by comprising a heating plate having a heating portion having a substantially “U” shape and an inner side serving as a heating surface, and in a more preferred embodiment, the heating plate has a first plate-shaped heating portion and a second heating portion. Are connected to each other in a V-shape at a predetermined opening angle with their heating surfaces inside.

The hot plate according to the present invention may employ either a contact heating system using conduction heat or a non-contact heating system using radiant heat or dielectric heating. This is a case where heating is performed by a non-contact heating method such as described below (described later). Further, the hot plate of the present invention is formed by connecting two conventional flat plate hot plates in a V-shape (see the reference numerals 70 (71, 72) in FIG. 1 showing an embodiment to be described later). Board) or a conventional flexible sheet type hot plate is bent into a V-shape and held by appropriate holding means,
It can be manufactured relatively inexpensively.

However, the heating surface does not necessarily have to be a flat surface, and the heating surface may be a curved surface in accordance with the outer surface shape of the molded article to be obtained (= the shape of the heated surface of the painted sheet). By doing so, the outer shape of the molded product (the shape of the female parting surface, the shape of the heated surface of the painted sheet, and the (clamping means of the sheeting means) are substantially similar) is determined for a specific product. Can reduce the difference between the maximum separation distance and the minimum separation distance between the painting sheet and the heating surface of the hot platen, so that the heating temperature distribution of the painting sheet is more uniform than that of a V-shaped heating plate having a flat heating surface. (Distribution range can be made small), but the effect is opposite for other shapes, and the versatility of the hot plate is reduced.

In a preferred embodiment of the present invention, the hot platen has a variable opening angle between the first plate-shaped heating section and the second plate-shaped heating section. More preferable specific examples of the heating plate include the first plate-shaped heating portion and the second plate-shaped heating portion.
One of the plate-shaped heating sections is connected with a hinge member, and the other end side is provided with an opening angle adjusting mechanism for relatively rotating in the opposite directions to each other with the hinge member as a fulcrum. As the opening angle adjusting mechanism, a fluid pressure (air or the like) cited as an example in an embodiment to be described later
Various types of manual type or automatic type such as a type using a cylinder (FIG. 14), a screw feed type, a swing lever drive type, and the like can be adopted.

Further, in a preferred embodiment of the device of the present invention,
A female mold and a male mold which are arranged to face each other and one of which can be moved to the other side, and which can be moved in a direction orthogonal to the parting surface of the female mold, and Clamp means for pressing and fixing on the parting surface of the mold, and moving the hot platen onto the cavity of the female mold when heating the painted sheet, and after completing the heating of the sheet, from the cavity of the female mold to an external standby position Driving means for moving, resin injection means for injecting and filling a resin in a flow state from the male mold side into the female mold cavity,
After the hot platen is moved onto the female mold cavity, its opening angle is automatically adjusted so as to be along the parting surface of the female mold. Examples of the driving means for the hot plate include those provided with a transfer mechanism including a fluid pressure cylinder, a rotating mechanism including a motor, and a guide mechanism including a guide rail.

Further, a method for simultaneous painting by injection molding according to the present invention uses a hot plate as described above, wherein a sheet supplying step of supplying a painted sheet onto the female parting surface, A clamping step of pressing and fixing the female mold parting surface with the three-dimensional clamping means,
A heating and softening step of bringing the hot plate close to the painted sheet pressed and fixed by the three-dimensional clamper and heating and softening the painted sheet by the hot plate; and bringing the painted sheet along the cavity surface of the female mold. A stretching step of stretching, a mold clamping step of moving one of the female mold and the male mold to the other side and clamping to form a cavity between the two molds, and flowing the resin in a fluid state into the cavity. An injection molding step of injecting and solidifying to solidify, a mold opening step of separating the female mold and the male mold, and a removing step of taking out the injection molded product to which the painted sheet is adhered from the female mold, The steps may be performed in the order described, or the order of the steps may be interchanged, and the steps may be sequentially performed or a plurality of steps may be performed simultaneously or in parallel.

In a preferred embodiment of the injection molding simultaneous painting apparatus and method according to the present invention having the above-described structure, FIG.
6 (B), after supplying the painted sheet S onto the parting surface 14 (the outer peripheral side parting surface 14a) of the female die 12, the painted sheet S is clamped by a clamping means (shown here). Then, the V-shaped hot platen 70 (plate-shaped heating portions 71, 72) is brought close to the painted sheet S, and the painted sheet S is placed in the hot platen 30.
To soften by heating.

Here, the hot plate is used as shown in FIG.
Flat heating surfaces 71a, 71 according to the present invention shown in FIG.
FIG. 16 shows a case where a V-shaped hot plate 70 having a first plate-shaped heating section 71 having a second plate-shaped heating section 72 and a second plate-shaped heating section 72 is used.
FIG. 1A shows a case where a conventional flat-type hot plate 171 having a flat flat heating surface 171a as shown in FIG.
6 (C), the female parting surface 14
A comparison is made between a case where a curved hot plate 270 having a curved heating surface 271a along the (outer peripheral side parting surface 14a) is used under the same conditions using the same female mold 12 and clamping means. The operation and effect will be described.

Heating surface 17 of each of hot plates 171, 70, 271
The maximum distances ΔXmax, ΔYmax, ΔZmax and the minimum distances ΔXmin, ΔYmin, ΔZmin between 1a, 71a and 72a, 271a and the picture sheet S are represented by the following expressions: ΔXmax−ΔXmin>ΔYmax−ΔYmin−ΔYmin> ΔZmax−
The relationship of ΔZmin ≒ 0 is satisfied.

That is, the hot platen 7 of the present invention shown in FIG.
Compared with the conventional flat platen hot plate 171 shown in FIG. 16A, the hot platen 70 of the present invention has heating surfaces 71a and 71b.
The difference Δy between the maximum separation distance ΔYmax and the minimum separation distance ΔYmin between the platen 2a and the sheet S is determined by the flat platen 171.
Is smaller than the difference (ΔXmax−ΔXmi = Δx), the heating temperature distribution of the painted sheet S can be made uniform (the distribution range is small) as compared with the flat plate type hot plate 171.

On the other hand, the hot plate 70 of the present invention and FIG.
Compared with the conventional curved surface hot plate 271 shown in FIG. 7C, the hot plate 70 of the present invention has a maximum separation distance ΔYmax and a minimum separation distance ΔY between the heating surfaces 71a and 72a and the painting sheet S.
Δy from the curved hot platen 271 is larger than the difference (ΔZmax−ΔZmin = Δz ≒ 0) in the curved hot platen 271, so that the heating temperature distribution of the painting sheet S is smaller than that of the curved hot platen 271. And becomes non-uniform (the distribution range is large).

However, a non-contact heating system (ΔXmin> 0, ΔYmin> 0, ΔZ
When the painted sheet S is heated by min> 0), the difference between the hot plate 70 of the present invention and the conventional curved hot plate 271 becomes small. The reason is that the intensity of the radiated infrared rays (the illuminance on the heated surface of the painting sheet S) is equal to the heating surface 71a and 72a of the hot platen 70 and the painting sheet S, ie, the separation distance ΔY.
This is because it is inversely proportional to the power. As can be clearly understood from FIG. 18, the amount of change of the value of 1 / square of the separation distance ΔY with the increase or decrease of the separation distance ΔY, that is, 1 / (ΔYmin)
The difference between ² and 1 / (ΔYmax) ² decreases as the separation distance ΔY increases.

Therefore, the difference between 1 / (ΔYmin) ² and 1 / (ΔYmax) ² becomes smaller as the maximum separation distance ΔYmax is larger than the minimum separation distance ΔYmin and is larger than 0. The influence of the distribution range of ΔY becomes less likely. Therefore, the V-shaped hot plate 70 of the present invention
Is much better than the conventional flat platen hot plate 171 from the viewpoint of making the heating temperature distribution uniform in the painted sheet S, and when the painted sheet S is heated by the non-contact heating method, the painted sheet S Even if the shape of the heated surface of S (convex curved surface) and the shapes of the heating surfaces 71a and 72a of the hot platen 70 do not completely match, surprisingly, it is almost the same as the curved hot platen 271. An equivalent effect can be obtained.

In addition to the above, the hot plate used in the injection molding simultaneous painting apparatus and method of the present invention can be simplified, lightened, and reduced in cost as compared with conventional curved and polyhedral hot plates. By making the opening angle between the first plate-shaped heating unit and the second plate-shaped heating unit variable, it is possible to expand the range of correspondence to the size and shape of the molded product to be obtained, to reduce the initial cost, and to reduce the frequency. Since it does not need to be bent, failures such as fatigue breakage are less likely to occur as compared with a conventional flexible sheet type hot plate, and the standby position and sheet heating are achieved by relatively small and simple driving means. The effect of being able to move between positions is also obtained.

In the present invention, the male and female molds are made of metal such as iron or ceramics, and are provided with small holes (vacuum suction holes or the like) for vacuum suction or compressed air supply as required. Further, the female mold is constituted by an aggregate of a plurality of divided portions (in a so-called nested structure), a slit-like gap is formed between adjacent divided portions, and vacuum suction is performed using this gap as a vacuum suction hole. It may be. The male mold is provided with a runner for injecting the resin in a flowing state and a required gate. The number, position, shape and the like of the gates can be freely set in consideration of the shape and the like of the product to be obtained.

In order to fix and hold the painted sheet on the convexly curved female parting surface, a clamping means having a pressing surface shape corresponding to the female parting surface is provided.
As the clamping means, a frame-shaped holding plate or the like can be used, and the driving thereof can use a molding driving force such as a mold clamping operation or the power of an ejector pin driving mechanism. This is achieved by separately providing a driving means such as a fluid pressure actuator. Opening and closing (release and gripping of a sheet) of the gripping means provided on the sheet conveying member of the apparatus of the present invention can also utilize the sheet fixing and holding operation of the clamp means. Driving is performed by utilizing the power of an ejector pin driving mechanism, or by separately providing a driving means such as a fluid pressure actuator.

The painted sheet is composed of a base sheet and a decorative layer laminated thereon, and is used as a final laminated product (laminate sheet) which is used as a final product while the base sheet is closely adhered to the molded product. Once the painted sheet and the molded article are integrated, any transfer sheet that peels off the substrate sheet (support sheet) while leaving only the decorative layer (transfer layer) on the molded article side can be used.

In the case of the laminated sheet, a thermoplastic resin such as polyolefin resin such as polyethylene and polypropylene, polyvinyl chloride, acrylic resin, polystyrene, ABS resin, polycarbonate resin and polyester resin is used as the base sheet. Can be. The thickness of the base sheet is usually about 20 to 500 μm. As the decorative layer, a printed pattern, colored or transparent coating, a metal thin film, or a functional layer such as a hard coating film, an antifogging paint, or a conductive layer can be used.

In the case of the transfer sheet, it is for transferring a transfer layer, such as a picture layer, once formed on a releasable support sheet, to another transfer target, and is not necessary on the support sheet. A release layer may be provided according to the conditions, and the transfer layer includes a release layer, a decorative layer, an adhesive layer, and the like, and layers other than the decorative layer are selected as necessary. The decorative layer is selected from a pattern layer, a metal thin film layer (part or entire surface) or a functional layer such as a hard coating film, an anti-fog coating film, or a conductive layer. The support sheet is preferably a flexible thermoplastic resin film such as a polyamide resin such as nylon 6 or nylon 66, a polyolefin resin such as polyethylene or polypropylene, or polyvinyl chloride, or a laminate thereof.

As the resin for injection molding, ABS (acrylonitrile-butadiene-styrene copolymer) resin,
Thermoplastic resins such as polystyrene, polyvinyl chloride, acrylic resin, and polycarbonate resin that have been heated and melted to be in a liquid or fluid state, or two-pack curable and catalyst-curable resins such as urethane resins and polyester resins For example, an uncured liquid, such as uncured liquid, can be made of a material that is conventionally known for simultaneous painting with injection molding, and is selected according to the required physical properties of the product, cost, and the like.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of an injection molding simultaneous painting apparatus according to the present invention, and FIG.
FIG. 3 is a perspective view showing a female mold peripheral part, FIG. 3 is a plan view showing the female mold peripheral part, and FIG. 4 is a schematic enlarged view of a portion viewed from an arrow A in FIG.

Injection molding simultaneous painting apparatus 10 of the present embodiment
The female mold 12 and the male mold 2 can be seen from FIGS. 1 and 2 and FIGS.
The female mold 12 has a bottom fixed to the movable platen (platen) 11 and is horizontally moved by the ram 9 of a fluid pressure cylinder or the like, in other words, in a direction approaching / separating from the male mold 25. (Y direction).

In the present embodiment, the female mold 12 is movable and moves in the horizontal direction as described above. However, the present invention is not limited to this. It is also possible to adopt a mode in which the female molds are vertically opposed and one of them is moved in the vertical direction.

The female mold 12 has a nested structure composed of a plurality of split molds.
2 is formed with a relatively shallow side view generally “C” shaped cavity 13 corresponding to the laminate to be obtained,
A parting surface 14 is formed on the outer peripheral side of the cavity 13. This parting surface 14 is shown in FIGS.
In addition to FIGS. 10 and 11, in addition, as can be understood, a stepped parting surface including an outer parting surface 14a and an inner parting surface 14b stepped down from the parting surface is provided. Outer parting surface 14
a and the inner peripheral side parting surface 14b are both male molds 25.
It has a substantially convex (mountain-like) curved surface projecting toward the side (Y direction).

Then, around the cavity 13 on the parting surface 14 (the inner peripheral parting surface 14b), an annular continuous section rectangular sheet for vacuum suction of the painting sheet S so as to surround the cavity 13. A fixing suction groove 16 is formed, and a predetermined number of vacuum suction holes 17 are opened in the sheet fixing suction groove 16 at a predetermined pitch (see FIG. 3).

A slit-like gap 15 serving as a vacuum suction hole is formed between the split dies of the female die 12. The slit-shaped gap 15 is opened at a boundary between a rounded corner (R) forming a corner of the cavity 13 and a plane part following the corner, and
It is connected to the vacuum suction hole 17. The reason why the slit-shaped gap 15 is opened at the boundary part is that the boundary part is the gap 1 used as a vacuum suction hole.
This is because traces of the filaments left on the laminate P due to the presence of No. 5 are the least noticeable places.

A vacuum suction hole 17 opened in the sheet fixing suction groove 16 and the slit-shaped gap 15 are connected to the outside through a vacuum suction passage 18 and a conduit 19 formed in the female mold 12. In this embodiment, the vacuum suction holes 17, the sheet fixing suction grooves 16, the slit-shaped gaps 15, the vacuum suction passages 18, the conduits 19, and an external vacuum pump are connected. And the like constitute a vacuum suction means.

Further, an annular mounting groove 23 in which an O-ring 22 is mounted is provided on the inner peripheral portion of the outer peripheral parting surface 14a of the female die 12. The O-ring 22
When the frame-shaped clamper 20 which is curved in a substantially “C” shape described below is pressed against the outer peripheral parting surface 14a of the female mold 12 with the painting sheet S interposed therebetween, the cavity 12 and the outside are It serves to airtightly shut off the air.

On the other hand, the male mold 25 is provided with an injection molding machine 32.
The male die 25 is fixed to a fixed platen 31 on which the nozzle of FIG. 1 is mounted, and has a core portion 33 corresponding to the shape of the laminated product to be obtained and a parting recessed in a "C" shape in side view. A surface 34 is provided, and a forked runner 27 for injecting and filling the molten resin P (FIG. 13) into the cavity 13 and two gates 28 connected to the runner 27 are provided inside the surface 34.

The female mold 12 has a rectangular frame shape in front view, similar to the parting surface 14a, for pressing and fixing the painting sheet S to the outer peripheral parting surface 14a of the female mold 12. A clamper 20 having a substantially "L" shape is attached. The clamper 20 is driven by a drive mechanism (not shown) with four connecting rods 24 slidably fitted in through holes provided near four corners of the female mold 12 to a parting surface 14 of the female mold 12. To move back and forth in the vertical direction. The male mold 25 is provided with a notch recess 29 having a depth capable of performing a separating operation for releasing the pressing and fixing state of the clamper 20 against the painting sheet S in a clamped state as shown in FIG. Have been.

The laminated product to be obtained by the simultaneous painting apparatus for injection molding 10 of the present embodiment is a panel having a rectangular shape in a plan view and a cross section having a substantially "U" shape. Here, an acrylic resin base sheet (having a thickness of 125 μm), a decoration layer (a 1: 1 weight ratio mixture of acrylic resin and vinyl chloride-vinyl acetate copolymer) laminated thereon by a gravure printing method, A laminated sheet (laminate sheet), which is used as a final product while having an adhesive layer (vinyl chloride-vinyl acetate copolymer system) closely adhered to the base material sheet and the injection molded resin Pa, is used. The decorative layer (pattern layer) has a wood grain pattern formed by combining three colors of a pattern plate, and the adhesive layer has a gravure solid printing plate (screen depth of 60 μm) having a screen ruling of 40 lines / cm. Using (Gravure printing 2
This is a layer having a thickness of 2 μm formed by color printing.

In addition to the female mold 12 and the male mold 25 described above,
The simultaneous injection molding painting apparatus 10 of the present embodiment includes a sheet supply apparatus 5 that supplies a painting sheet S onto the parting surface 14 of the female mold 12. The sheet feeding device 5 is mounted on the support frame 1 installed on the left side of the female mold 12 in a side view (FIG.
Base frame 6 arranged to be able to advance and retreat along
The base frame 6 is connected and fixed to the movable platen 11 by a connecting member 7. As shown in FIG. 2, a pair of left and right sprocket wheels 42, 42, 43, 43, which are arranged below the female die 12 and constitute a part of the sheet feeding device 5, are described below. Are also connected to the female die 12. Therefore, the sheet feeding device 5 advances and retreats in the direction (Y direction) approaching and separating from the male mold 25 integrally with the female mold 12.

On the base frame 6, there is provided an unwinding machine RS loaded with a long strip-shaped picture sheet S wound up in a roll shape. The unwinding machine RS and a plurality of guide rollers 48, 48, ..., one shot of the pictured sheet S sent out as described later
A pair of left and right sprocket wheels 41, 41, 44, 4 near the right end (female mold 12 side) and near the left end of the base frame 6 so as to be supplied on the parting surface 14.
4, 45 and 45 are provided (see also FIG. 4). Sprocket wheels 41, 41 located at the right end
Are driven to rotate by a stepping geared motor 52, and left and right sprocket wheels 41, 44, 45 (left column) and 41, 44, 45
(Right row) and the left and right sprocket wheels 42, 43 (left row) and 42, 43 (right row) below the female die 12 have endless annular chains 50, 50 of the same size and shape as sheet conveying members, respectively. Are wound around one by one so as to form an L shape as a whole.

Here, as shown in FIGS. 6 and 7, the endless annular chains 50, 50 are provided with support members 61, for example, at every two pitches.
A large-diameter roller 62 and a small-diameter roller 63 are attached to a lower portion and an intermediate portion of the roller, and a predetermined pitch (for example, 5 pitches)
Each time, a sheet gripping chuck 60 for gripping both ends in the width direction of the one-shot painting sheet S is provided above the support member 61. The required number of the sheet gripping chucks 60 are provided only in a specific range of the endless annular chains 50, 50 so that the sheet S with a length of one shot can be gripped.
The part of the endless annular chains 50, 50 where the sheet gripping chuck 60 is provided (the part that grips the one-shot painting sheet S) is placed in the base frame 6 on the female die 12. A reciprocating motion is made between a standby position located and a supply position located on the female parting surface 14.

More specifically, at the standby position, the sheet S with a picture from the unwinder RS is moved from a sheet holding mechanism 55 provided on the base frame 6 to a pair of rails as shown in FIG. 59, the sheet withdrawing mechanism 57 that slides on 59 pulls out one shot in the Y direction, and the drawn one shot sheet S is separated from the unwinder RS by the sheet cutter 56. At this time, both ends in the width direction of the one-shot picture-added sheet S are attached to the required number of left and right sheet gripping chucks 60 provided on the endless annular chains 50,.
And transports the gripped picture sheet S to a supply position directly above the female parting surface 14 which is curved in a substantially convex shape. After the transfer, the paint sheet S is clamped as described later. After being fixedly held on the female parting surface 14 by 20, the sheet gripping chuck 60,
.. Are returned to the standby position.

In order to adopt such a sheet feeding mode, the left and right endless annular portions are provided on the parting surface 14 side of the female mold 12 as can be clearly understood from FIGS. 2, 3, 5 and the like. Chain 50, large diameter roller 62, small diameter roller 6
3 and a pair of left and right supply-side guide grooves 36, 36 extending in the vertical direction (Z direction) while being curved along the outer peripheral parting surface 14a for guiding the passage of the sheet gripping chucks 60, 60,. The left and right endless annular chains 50, large-diameter rollers 62 are provided on the bottom side thereof.
A pair of left and right bottom side guide grooves 38, 38 extending in the vertical direction (Z direction) through which the air flows.

Here, the supply side guide groove 36 is provided with the endless annular chain 50 and the sheet holding chucks 60 and 6.
.. Have a cross-sectional shape capable of regulating the position in two directions orthogonal to the sheet conveying direction, and have an intermediate wall 36A protruding in the groove width direction as shown in FIGS. The upper side of the intermediate wall 36A is an opening groove 36a that opens in the parting surface 14 where the lower portion (fixed receiving piece 65) of the sheet gripping chuck 60 is located. The large-diameter rollers 62 and the small-diameter rollers 63 provided on the endless annular chains 50, 50 are inserted and guided so as to sandwich them, and the intermediate wall 3
6A and the bottom wall are provided with position regulating concave portions 36d and 36c into which the large-diameter roller 62 is loosely fitted. Due to the presence of the position restricting recesses 36d, 36c and the intermediate wall 36A, the endless annular chains 50, 50 and the sheet gripping chucks 60, 60,... Two directions perpendicular to the direction along the surface 14 (vertical direction and horizontal direction in FIG. 7)
The position is regulated with respect to.

The sheet holding chuck 60 is provided on the support member 61 in a lateral direction so as to protrude in the lateral direction, and receives the back side (lower side) of the painted sheet S from the fixed receiving portion 65 and the parting surface 14. A movable holding piece 66 pivotally supported by a support plate 64 so as to be positioned on the upper side; and a movable holding piece 66, which is always fixed by a compression coil spring 67. 65, the sheet S is urged in a direction for holding the painting sheet S. Therefore, the painted sheet S gripped by the sheet gripping chucks 60 is moved substantially along the convexly curved parting surface 14 of the female die 12. In order to more firmly and securely hold the picture sheet S by the movable holding piece 66 and the fixed receiving piece 65, the contact holding portion (the picture sheet S) is appropriately used.
May be formed at the one end portion sandwiching the first and second teeth so as to be meshed with each other, or a countermeasure such as engraving fine embossed irregularities on them may be taken.

On the side of the endless annular chain 50 of the movable pressing piece 66, the clamper 20 is provided with a picture sheet S.
When the roller 6 is pressed and fixed to the female parting surface 14, the roller 6 pressed against the interference avoiding concave portion 21 provided on the
When the roller 68 is pressed by the concave portion 21 of the clamper 20, the movable pressing piece 66 separates from the fixed receiving piece 65 against the urging force of the compression coil spring 67. The sheet holding chuck 60 releases the holding state of the sheet S with the image (see FIG. 8).

On the other hand, in order to apply a required tension to the endless annular chains 50, 50, in this embodiment, as shown in FIG. A pair of tension-applying sprocket wheels 46 are provided which are pressed against each other.
Position of the tension imparting sprocket wheel 46 with respect to the endless annular chain 50 (Y direction in FIG. 1).
Is adjusted, the tension of the endless annular chain 50 is adjusted, and the endless annular chain 50 and the sheet holding chuck 6 with respect to the supply side guide groove 36 of the female die 12 are adjusted.
The position of 0 is uniquely determined. Note that a sprocket wheel 47 (shown by a virtual line) for applying tension may be similarly provided above (upstream side) the female die 12.

In addition to the above configuration, in the simultaneous injection molding painting apparatus 10 of the present embodiment, the parting surface 14 of the female mold 12 has a substantially convex curved surface.
Since a hot plate for heating and softening the painted sheet S pressed and fixed on the parting surface 14 by the clamper 20 cannot be properly performed with a conventional flat plate-shaped structure,
The hot platen 70 has a configuration as shown in FIGS.

That is, the hot platen 70 of this embodiment is, for example, a piston of a hydraulic cylinder as drive means for moving back and forth in the horizontal direction (X direction) so as to approach and separate on the parting surface 14 of the female mold 12. A rectangular thin box-shaped holding case 75 fixed to the tip of the rod 86, and a hinge member 79 provided on a bracket 78 protruding near the center of the left-right (X-direction) end 76 of the holding case 75. It includes a first plate-shaped heating unit 71 and a second plate-shaped heating unit 72 that are connected to be openable and closable. The first plate-shaped heating unit 71 and the second plate-shaped heating unit 72 have one ends of link members 73 and 74 rotatably connected near the center of the side end surface, respectively. The other end of the piston rod 2
The connecting members 81, 8 are respectively attached to both ends of the piston rods 80a, 80b of the air cylinder 80, which are fully held and whose piston rods 80a, 80b protrude from both ends.
2 so as to be freely rotatable. Connecting members 81 and 82 for connecting the link members 73 and 74 and both end portions of the piston rod 80a are formed in a side wall of the holding case 75, and are elongated holes 77 extending in a vertical direction (Z direction). 77 is slidably loosely inserted.

Here, the piston rods 80a and 80b of the air cylinder 80 are always urged in the projecting and extending direction by urging means such as a coil spring.
When 0 is at the standby position outside the female mold 12 (in the X direction) (see FIG. 9), the piston rods 80a and 80b are in the most protruded and extended state, and at this time, the first plate Heating section 71 and second plate-shaped heating section 72
As shown by an imaginary line in FIG. 14, it is opened by 180 degrees like a single plate-like hot plate. On the other hand, when the hot platen 70 is advanced to the heating position on the painting sheet S fixed and held on the parting surface 14, which is a substantially convex curved surface of the female die 12, the piston rod 80a , 80b are in the most retracted state. At this time, the first plate-shaped heating portion 71 and the second plate-shaped heating portion 72 have their free ends opposite to each other with the hinge member 79 as a fulcrum. 14 and 15, the opening angle is adjusted in a substantially "C" shape in a side view so as to follow the painted sheet S as shown in FIGS.

As described above, the first plate-shaped heating portion 7 of the hot platen 70
The opening angle of the first and second plate-shaped heating sections 72 is adjusted to be substantially “C” shaped in side view so as to be along the picture sheet S, so that compared to a conventional flat plate-shaped hot plate, The separation distance between the heating surfaces 71a and 72a and (the outer peripheral portion of) the painting sheet S is greatly reduced (from La to Lb in FIG. 14).
Becomes).

In the simultaneous injection molding apparatus 10 according to the present embodiment having the above-described configuration, the painting sheet S is a continuous long strip-shaped sheet wound in a roll shape. On the upper side (upstream side in the sheet conveying direction), one shot is unwound from the unwinding machine RS and arranged at a constant interval along the sheet conveying direction provided on the pair of endless annular chains 50, 50. .. Of the shot in the width direction are gripped by the required number of sheet gripping chucks 60, 60, and one shot is separated from the unwinder RS side by the sheet cutter 56.

Here, the pair of endless annular chains 5
The left and right sprocket wheels 41 to 45, which are endless annular bodies, respectively, constitute guide driving means.
The endless annular chain 5 is disposed so as to pass through the supply-side guide groove 36 and the bottom-side guide groove 38 provided in the female mold 12 at all times.
Sheet grip chucks 60 provided at 0 and 50,
The parts 60,... Are located at standby positions outside the female mold (see FIGS. 1 and 2).

Therefore, the sheet holding chuck 6
When the stepping geared motor 52 is rotated by a predetermined number of revolutions in one direction (forward direction) in a state where both ends in the width direction of the painting sheet S are gripped by 0, 60,. 41-45
Are rotated in one direction (clockwise in FIG. 1), and the endless annular chains 50, 50 rotate accordingly, and the sheet gripping portions (fixed receiving portion 65) of the sheet gripping chucks 60, 60,. , The movable presser piece 66) is the female mold 1
The large-diameter roller 62 and the small-diameter roller 63 are inserted into the supply-side guide groove 36 provided along the second parting surface 14 (14a).
9 and 10, the sheet gripping chucks 60, 6 of the endless annular chains 50, 50, as shown in FIGS.
0,... The painted sheet (for one shot) S gripped by the portions is the convex parting surface 1 of the female mold 12
The sheet is conveyed and positioned directly above the sheet 4 (sheet chucks 60, 60,... Move from the standby position to the supply position).

Subsequently, the sheet S with a picture is
When the sheet S with the picture is fixed and held on the parting surface 14a of the female mold 12 by the clamper 20, the sheet fixing of the clamper 20 is performed. By using the holding operation, the sheet gripping chucks 60, 60,... Perform a releasing operation for releasing the gripping state of the painting sheet S. That is, as can be clearly understood with reference to FIGS. 7 and 8, the roller 68 provided on the movable pressing piece 66 of the sheet gripping chucks 60, 60,. The movable holding piece 66 is fixed to the fixed receiving piece 65 against the urging force of the compression coil spring 67.
, The sheet gripping chuck 60 releases the gripping state of the picture sheet S.

Further, the sheet holding chuck 60,
After the release operation is performed at 60,..., The painting sheet S is moved by the clamper 20 to the parting surface 14a.
While being fixedly held on the upper side, the stepping geared motor 52 is rotated in the reverse direction, and the left and right sprocket wheels 41 to 45 are rotated in the direction opposite to the direction of sheet supply, whereby the endless annular chain 50, Are rotated in the opposite direction, and the sheet gripping portions (fixed receiving piece 65, movable holding piece 66) of the sheet gripping chucks 60, 60,. The parting surface 14 (1
4a) is drawn back to the upstream side of the female die 12 from the supply-side guide groove 36 provided along with the supply side guide groove 36, and is returned to the original standby position in conjunction with the pulling-out of the female die 12. Preparation (drawing, gripping, etc. of the sheet) is performed.

Next, the sheet holding chucks 60, 6
0,... With the outer periphery fixedly held on the parting surface 14a of the female die 12 by the clamper 20, as shown in FIG. Is moved forward from the standby position to the heating position directly above the painted sheet S, and the opening angle of the first plate-shaped heating unit 71 and the second plate-shaped heating unit 72 is changed to a convex parting. Section "ku" along the surface 14a
The heating surfaces 71a, 72a of the hot platen 70
As a result, the painted sheet S is softened by heating (heating softening step). Then, as shown in FIG. 11, the painted sheet S is female-molded by vacuum suction through the vacuum suction holes 17 and the slit-shaped gaps 15. 12 inner parting surface 1
4b and the cavity 13 are stretched and adhered to them (stretching step).

Thereafter, a mold clamping step of moving the female mold 12 toward the male mold 25 to perform mold clamping (see FIG. 12) is performed as in the conventional case. In this case, the entire sheet feeding apparatus 5 is used. It moves to the male mold 25 side integrally with the female mold 12. Subsequently, the runner 27 and the gates 28, 28 of the male mold 25 are placed in the cavity 13 formed between the female mold 12 and the male mold 25.
An injection molding step (see FIG. 13) for performing injection molding for injecting and filling a resin (a molten resin or the like) in a fluidized state through the process to solidify, a mold opening step for separating the female mold 12 and the male mold 25,
A sheet trimming step of separating a portion of the painted sheet S to be bonded and attached to the injection resin molded body from another portion (excess portion), and a removing step of taking out a laminated product on which the painted sheet S is adhesively laminated from both male and female molds. Then, a laminated product (product) in which the painted sheet is laminated on the injection resin molded body is obtained.

In the simultaneous injection molding painting apparatus 10 according to the present embodiment, the required number of sheet chucks 6 are attached to the painting sheet S by the endless annular endless chains 50, 50.
Since the sheet is conveyed and fed by the sheet feeding device 5 provided with 0, 60,..., The leading end side of the conventional sheet conveying member is free, and the sheet conveying member is simply unwound at the time of sheet feeding. It is possible to apply an appropriate tension to the sheet conveying member (the endless annular chains 50, 50) as compared with the case of using the sheet feeding means that is rewound after the sheet is supplied. The positions of 50 and the sheet holding chucks 60, 60,... Provided on the supply-side guide grooves 36, 36 provided in the female die 12 are uniquely determined. Thereby, the endless annular chains 50, 50 and the sheet gripping chucks 60, 60,.
The endless annular chain 50,
50 and the sheet chucks 60, 60,.
Collision or snagging of the guide grooves 36, 36 around the peripheral edges of the guide grooves 36, 36 is effectively avoided, and the taking-in / out operation is stabilized, and sheet feeding is performed smoothly.

The female type (movable type) 12 is movable in the direction approaching and separating from the male type (fixed type) 12 for clamping and opening the mold.
Can be moved integrally with the female mold 12, so that even if the initial position (mold opening position) of the female mold 12 is shifted, the endless annular chains 50, 50 and the sheet grips provided on the chain are provided. .. Enter and exit the guide grooves 36, 36 of the female mold 12 appropriately, and the sheet can be supplied more stably and smoothly.

Therefore, according to the simultaneous injection molding painting apparatus 10 of the present embodiment, the supply of the painting sheet S can be performed more stably and efficiently, and in particular, the parting surface 14 of the female mold 12 is entirely Even if it has a curved surface such as a convex shape, the painted sheet S can be supplied smoothly and quickly.

Moreover, even if the product to be obtained has a large curvature (such as a deep drawing shape), the female mold cavity does not have to be so deep from the parting surface. While it is hard to cause tears,
Without relaxing the molding conditions such as heat and pressure, it is possible to adhere the painted sheet along the cavity,
Good quality products can be reliably obtained.

In addition to the above, the hot platen 70 provided in the simultaneous painting apparatus for injection molding 10 of the present embodiment has
The opening angle of the first plate-shaped heating unit 71 and the second plate-shaped heating unit 72 is generally “K” in a side view so that the first plate-shaped heating unit 71 and the second plate-shaped heating unit 72 are along the sheet S.
Due to the adjustment in the shape of a letter, the distance between the heating surfaces 71a and 72a and (the outer peripheral portion of) the painting sheet S is significantly reduced as compared with the conventional flat plate-type hot plate (La in FIG. 14). To Lb).

Here, as described above with reference to FIG.
Comparing the hot plate 70 of the present embodiment with the conventional flat plate hot plate 171 of FIG. 16A, the hot plate 70 of the present invention has a maximum separation distance between the heating surfaces 71a and 72a and the sheet S with the picture. The difference Δy between ΔYmax and the minimum separation distance ΔYmin is the difference between them (ΔXmax−ΔX
mi = Δx), so that the heating temperature distribution of the painted sheet S can be made uniform (the distribution range is small) as compared with the flat plate type hot plate 171.

In other words, when the hot platen is of a flat plate type, among the painted sheets, the vicinity of the top of the painted sheet S forming the convex curved surface is close to the heating surface of the hot platen. The bottom (foot side) of the curved surface is considerably away from the heating surface of the hot platen. However, in the hot platen 70 of the present embodiment, the painting sheet S, the first plate-like heating unit 71, and the second plate-like heating unit The difference between the maximum separation distance and the minimum separation distance between the heating surfaces 71a and 72a of the portion 72 becomes extremely small, the amount of stretching in each portion of the picture sheet S does not vary, and the distortion of the pattern and the deformation between the pattern and the molded body. Displacement is less likely to occur.

As described above with reference to FIGS. 16 and 18, the illuminance on the painted sheet S is inversely proportional to the square of the separation distance ΔY between the heating surfaces 71a and 72a of the hot platen 70 and the painted sheet S. The amount of change of the value of 1 / square of the distance ΔY with the increase / decrease of the separation distance ΔY, that is, 1 / (ΔYmin)
^Since the difference between ² and 1 / (ΔYmax) ² decreases as the separation distance ΔY increases, the maximum separation distance ΔYma
As x and the minimum separation distance ΔYmin are larger than 0, 1 /
The difference between (ΔYmin) ² and 1 / (ΔYmax) ² becomes small, and the distribution range of the separation distance ΔY becomes less affected.

For this reason, the V-shaped hot plate 70 of this embodiment
From the viewpoint of making the heating temperature distribution uniform in the painting sheet S, when heating the painting sheet S by the non-contact heating method, the shape of the painting sheet S and the shape of the heating surfaces 71a and 72a of the hot platen 70 Does not completely match, there is almost no loss of color with the curved hot platen 271.

In addition to the above, the heating plate 70 used in the simultaneous injection molding painting apparatus 10 of this embodiment is simpler than the conventional curved and polyhedral heating plate 271, so that the weight and cost can be reduced. In addition, since it is not necessary to bend frequently, failures such as fatigue rupture can be less likely to occur as compared with a conventional flexible sheet type hot plate, and the driving means has a relatively small size and a simple structure. As a result, an effect of being able to move between the standby position and the sheet heating position can be obtained.

As shown in a hot platen 270 shown in FIG. 17, a sheet cutter 100 is provided at the end of the painted sheet supply side, and a relief groove 89 into which the sheet cutter 100 enters is provided at a position corresponding to the female mold 12. And the piston rod 86 of the fluid pressure cylinder 85 for moving the hot plate forward and backward
The hot platen 270 is attached to the tip via an air cylinder 87, and the piston rod 88 of the air cylinder 87 is attached.
, The hot platen 270 is moved to the sheet heating position on the female mold 12 side, so that the painted sheet S (in this case, a continuous strip-shaped long sheet)
May be cut by the sheet cutter 100 between the heated next shot portion and the supply-side upstream portion of the painting sheet S.

In this case, the timing for cutting the painted sheet by the sheet cutter 100 is between the time when the painted sheet S is pressed and fixed to the parting surface 14a of the female die 12 by the clamper 20 and the time when heating is completed. This may be immediately before, simultaneously with, or immediately after the hot platen 270 is stopped at the sheet heating position. By cutting the painted sheet as described above, it is possible to prevent adverse effects such as thermal stress and deformation strain applied to the painted sheet from going back to the upstream portion (for the next shot) of the painted sheet. In addition, as the sheet cutter 100, a cutting tool, a heating filament, or the like can be used.

[0076]

As will be understood from the above description, the hot plate used in the simultaneous injection molding painting apparatus and method according to the present invention has a female parting surface having a substantially convex curved surface. In addition, the heating temperature distribution of the painted sheet can be made as uniform as possible as compared with the conventional flat-plate type hot plate, and the simplification, weight reduction, and lowering can be achieved as compared with the conventional curved and polyhedral type hot plate. By increasing the cost, and by making the opening angle variable, it is possible to expand the range corresponding to the dimensions and shape of the molded product to be obtained, and furthermore, it is possible to make failure less likely than in the case of a conventional flexible sheet type hot plate. At the same time, there is an excellent effect that it is possible to move between the standby position and the sheet heating position by the driving means having a relatively small size and a simple configuration.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of an injection molding simultaneous painting apparatus according to the present invention.

FIG. 2 is a perspective view showing a female peripheral portion shown in FIG. 1;

FIG. 3 is a front view of a peripheral portion of a female mold of the device shown in FIG. 1;

FIG. 4 is an enlarged view of FIG.

FIG. 5 is a horizontal sectional view of the female mold shown in FIG. 1;

FIG. 6 is a partially enlarged side view showing an endless annular chain and a sheet gripping chuck used in the apparatus shown in FIG. 1;

FIG. 7 is a partially enlarged cross-sectional view for describing an endless annular chain, a sheet gripping chuck, and a guide groove provided in a female die used in the apparatus shown in FIG. 1;

FIG. 8 is a partially enlarged cross-sectional view used for describing the operation of the endless annular chain and the sheet gripping chuck used in the apparatus shown in FIG.

FIG. 9 is a perspective view of the periphery of a female die used for explaining a sheet feeding step of the apparatus shown in FIG. 1;

FIG. 10 is a diagram which is used for describing a sheet supply step of the apparatus shown in FIG.

FIG. 11 is a diagram which is used for describing a stretching step and a heat softening step of the apparatus shown in FIG. 1.

FIG. 12 is a diagram which is used for describing a mold clamping step of the apparatus shown in FIG.

FIG. 13 is a diagram which is used for describing an injection molding process of the apparatus shown in FIG.

FIG. 14 is a diagram provided for describing a hot plate used in the apparatus shown in FIG. 1;

FIG. 15 is a perspective view for explaining a hot plate used in the apparatus shown in FIG. 1;

16A and 16B are diagrams used to explain the function and effect of a hot plate used in the simultaneous injection molding painting apparatus according to the present invention in comparison with a conventional hot plate, and FIG. (B) shows a case using a V-shaped hot plate of the present invention, and (C) shows a case using a conventional curved-type hot plate.

FIG. 17 is a diagram showing an example in which a sheet cutter is provided on a hot plate used in the simultaneous injection molding and painting apparatus of the present invention.

FIG. 18 is a graph for explaining the function and effect of the hot plate used in the simultaneous injection molding painting apparatus of the present invention.

[Explanation of symbols]

 S Painting sheet 5 Sheet feeding device 10 Injection molding simultaneous painting device 12 Female mold 13 Cavity 14 Parting surface 15 Slit-shaped gap 17 Vacuum suction hole 20 Clamper 25 Male mold 36 Supply-side guide groove 41-45 Sprocket wheel 46 For applying tension Sprocket wheel 50 Endless annular chain 60 Sheet chuck zipper 65 Fixed receiving piece 66 Movable presser piece 70 Hot plate 71 First plate-shaped heating unit 72 Second plate-shaped heating unit

Claims (5)

(57) [Claims] In a simultaneous injection molding and painting apparatus in which a female parting surface is a curved surface having a substantially convex shape, a first plate-shaped heating unit and a second plate-shaped heating unit are provided with the heating surfaces thereof. A simultaneous injection molding and painting apparatus, comprising: a heating plate which is provided inside and is connected in a V-shape with a predetermined opening angle therebetween. 2. The simultaneous injection-molding and painting apparatus according to claim 1, wherein an opening angle between the first plate-shaped heating portion and the second plate-shaped heating portion of the hot platen is variable. . 3. One end of the first plate-shaped heating unit and one end of the second plate-shaped heating unit are connected by a hinge member, and the other end of the first plate-shaped heating unit and the other end of the second plate-shaped heating unit are opposite to each other with the hinge member as a fulcrum. 3. The simultaneous injection molding and painting apparatus according to claim 2, further comprising a hot plate provided with an opening angle adjusting mechanism for rotating. 4. A female mold and a male mold which are arranged to face each other and one of which is moved to the other side, and which is movable in a direction orthogonal to a parting surface of the female mold. Clamping means for pressing and fixing the painted sheet on the female parting surface, and moving the hot platen over the female mold cavity when heating the painted sheet,
After the sheet heating is completed, there is provided a driving unit for moving the female mold cavity from the cavity to an external standby position, and a resin injection unit for injecting and filling a resin in a fluid state from the male mold side into the female mold cavity. 3. The method according to claim 2, wherein, after the hot platen is moved onto the cavity of the female mold, the opening angle thereof is automatically adjusted so as to be along the parting surface of the female mold.
Or the injection molding simultaneous painting apparatus according to 3. 5. A simultaneous injection molding painting method using the simultaneous injection molding painting apparatus according to claim 4, wherein a sheet supply step of supplying a painting sheet onto the female parting surface, and the painting sheet. A clamping step of pressing and fixing the female plate on the parting surface of the female mold by the clamping means, and bringing the hot plate close to the painted sheet pressed and fixed by the clamper to heat and soften the painted sheet by the hot plate. A heating and softening step, a stretching step of stretching the painted sheet along the cavity surface of the female mold, and moving one of the female mold and the male mold to the other side to perform mold clamping and perform a mold clamping between the two molds. Mold forming step of forming a cavity in the cavity, injection molding step of injecting and filling a resin in a flow state into the cavity to solidify, and mold opening step of separating the female mold and the male mold Taking out the injection-molded product to which the painted sheet is adhered from the female mold, and in which the steps are described in the order described, or the order of the steps is changed, or a plurality of steps are simultaneously overlapped or parallel. Injection molding simultaneous painting method adapted to be performed.