JP2001009864A - Injection molding in-mold-decorating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject apparatus constituted so as to prevent the transmission of vibration, shaking and an impact to an unwinder or the like at the time of mold clamping or opening of both male and female molds not only to prevent the generation of trouble in the supply of a decorating sheet but also to easily regulate the position of a hot platen at the time of heating process. SOLUTION: A female mold 12 is allowed to advance and retreat in approaching and separating directions with respect to a male mold 30 and at least the unwinder 50 of a sheet supply means is arranged on a fixed base stand 5 independent of the female mold 12 and a hot platen is moved in the direction (Y-direction) along the parting surface 14 of the female mold 12 by a hot platen driving means independent of the female mold 12 and can be positionally regulated along the advance and retreat direction (Y-direction) of the female mold 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative laminated product (product) in which a painted sheet on which a pattern, a character or the like is applied in a mold at the same time as injection molding is integrally adhered and laminated on the surface of an injection resin molded product.
The present invention relates to a hot plate used for simultaneous injection-molding and painting for obtaining a hot plate.

[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 in which one of the female mold and the male mold (usually a female mold) is moved to the other (usually a male mold) to perform mold clamping. (F) An injection molding step of injecting and filling a resin (molten resin) in a flowing state from the male mold side into a cavity formed between the female mold and the male mold to perform 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.

In the simultaneous injection molding painting method as described above, the painting sheet is pressed and fixed on the female parting surface by a clamper as a preliminary molding step before the injection molding step, and the painting sheet is heated. It is preferable to carry out a step of stretching in a softened state and closely contacting along the female mold cavity. For this reason, in a normal simultaneous injection molding painting apparatus, the painting sheet is fixed to the female parting surface. And a hot platen for heating and softening the painted sheet.

This will be briefly described below with reference to FIGS. The figure shows an injection molding simultaneous painting apparatus 10 'conventionally used, and a laminated product to be obtained by this apparatus 10' is, for example, a relatively deep drawn square having a U-shaped vertical cross section. This is a tray-shaped panel in which a painted sheet S (laminate sheet) having, for example, a wood-grained decorative layer is bonded and laminated on the surface of the injection resin molded body Pr (FIG. 7).

The apparatus 10 'includes a female mold 12 and a male mold 30 having concave and convex shapes corresponding to the laminated product to be obtained. The female mold 12 is not shown, but has a bottom portion (the left end in the figure). Side) is fixed to the movable platen, and is made to advance and retreat in a horizontal direction (X direction in FIG. 1), in other words, in a direction approaching and separating from the male mold 30 by a ram or the like of a fluid pressure cylinder. A cavity 13 corresponding to a laminated product to be obtained is formed in the female mold 12.
3, a plurality of vacuum suction holes 15, 15,... For vacuum suction are opened as shown in FIG. 6 in order to stretch the painting sheet S along the cavity 13. Are connected to a vacuum source (not shown) including an external vacuum pump or the like via a vacuum suction passage 18 and a conduit 19.

Further, the parting surface 1 of the female mold 12
On the outer peripheral side of 4, an annular mounting groove 23 in which an O-ring 22 is mounted is provided. The O-ring 22 includes a clamper 20 having a rectangular frame shape or a cross-girder shape whose plan view shape to be described later is rectangular.
However, when pressed against the parting surface 14 of the female mold 12 with the painting sheet S interposed therebetween, it serves to hermetically shut off the cavity 12 from the outside. On the other hand, the male mold 3
0 is not shown, but is fixed to a fixed platen to which a nozzle of an injection molding machine is mounted.
A convex core portion 31 corresponding to the laminated product shape is provided, and a runner 32 for injecting the molten resin and a gate 33 connected to the runner 32 are provided therein.

The female mold 12 is provided with a clamper having a rectangular frame shape or a cross-girder shape in plan view so as to press and hold the supplied one-shot painting sheet S on the parting surface 14. 20 are provided. This clamper 20 has four sliding rods 2 connected to its four corners.
A drive means (not shown) can move forward and backward in the direction perpendicular to the parting surface 14 (the X direction in the figure) through the drive means 4.

Further, a hot plate 80 as shown in FIG. 6 is provided for preforming. The hot platen 80 is the female mold 1
2 is inserted between the molds from a standby position outside the male and female forming dies by a hot plate driving means (not shown) such as an air cylinder which is attached and held so as to move integrally with one of the two molds. Then, it is moved to the painting sheet heating position (the position shown in the figure) on the parting surface 14 of the female mold 12, and the painting sheet S is heated and softened. Hot plate 80
Here, the painting sheet S is heated by a non-contact heating method using infrared radiation.

On the other hand, below the female mold 12 (on the upstream side when viewed in the sheet supply direction), a winding sheet for supplying a painting sheet (laminated sheet) S on the parting surface 14 of the female mold 12 is provided. An output device 50, a pair of feed rollers (nip rollers) 52, an opening / closing-type fixed chuck 54 for temporarily holding and fixing the picture sheet S, and a sheet cutting device 60 are provided. The unwinding machine 50, the feed roller 52, and the fixed chuck 54 are attached to the female mold 12 via support members 55 and 56, respectively, and move in a direction of approaching and separating from the male mold 30 together with the female mold 12. It can be moved to.

An opening / closing-type transport chuck 57 is disposed above the male and female molds 12 and 30 (on the downstream side when viewed in the sheet feeding direction). The transport chuck 57 grips the leading end of the picture sheet S unwound from the unwinder 50 loaded with the long strip-shaped picture sheet (sheet roll), and performs parting of the female mold 12. The transfer chuck 57 is traversed from the bottom to the top across the surface 14 to the vicinity of the upper end thereof. The transfer chuck 57 is attached to the tip of a piston rod 58 of a chuck driving cylinder (not shown), From the standby position shown by the solid line in FIG. 5 by the driving cylinder,
It passes through the space between the female parting surface 14 and the clamper 20 (Z direction = vertical direction), and is lowered straight (virtual line in FIG. 5) and raised.

The transport chuck 57 and the fixed chuck 54 are configured such that their opening and closing chuck portions 57a and 54a can be opened and closed by an air cylinder or the like (not shown).
In a, comb-shaped irregularities are formed so as to be inserted into each other so that the leading end of the sheet S with a picture can be reliably grasped and delivered. Further, the sheet cutting device 60 disposed below the female die 12 is configured to, after the clamping process, transfer the painted sheet S unwound from the unwinder 50 for one shot on the upstream side of the clamper 20. It is for cutting into single sheets and is mounted on the fixed chuck 54 via a support member 59. One or a plurality of cutting air cylinders 62 and a piston rod of the cutting air cylinder 62 are provided. 62a, a wide cutting blade (cutter) 65 for cutting the sheet S with a width in the width direction.

When performing simultaneous injection molding painting by the simultaneous injection molding painting apparatus 10 ′ having the above-described configuration, first, the painted sheet S is placed on the female parting surface 1.
4 to be fed onto the unwinder 5 as shown in FIG.
0, the leading end of the picture sheet S unwound via the sheet feed roll 52 is gripped and fixed by the fixed chuck 54, and the piston rod 58 of the chuck driving cylinder is projected so that the transport chuck 57 is moved. 5 from a standby position indicated by a solid line to a position at which the leading end of the painting sheet S gripped by the fixed chuck 54 can be gripped as indicated by a virtual line in FIG. The opening / closing chuck portion 57 of the transport chuck 57 is moved straight down in the direction along
is closed, the opening / closing chuck portion 54a of the fixed chuck 54 is opened, and the leading end of the sheet S with the picture is transferred to the transport chuck 57 side. Thereafter, the piston rod 58 of the air cylinder for driving the chuck is pulled into the transport chuck 57. Is raised straight along the female parting surface 14. As a result, the one-shot picture-added sheet S is supplied onto the female parting surface 14 (sheet supply step).

In this manner, the sheet S with the picture is
After being supplied onto the parting surface 14, as shown in FIG. 6, the clamper 20 is advanced to the parting surface 14 side, and the painted sheet S is pressed against the parting surface 14 by the clamper 20 and fixed. Hold (clamping process). As soon as this clamping process is completed,
By closing the opening / closing chuck portion 54a of the fixed chuck 54 to grip and fix the painting sheet S, the piston rod 62a of the cutting air cylinder 62 is protruded, and the cutting blade 65 provided at the distal end thereof protrudes.
The picture-added sheet S is cut in the width direction to obtain sheet sheets for the current shot (sheet cutting step).

Subsequently, as shown in FIG.
Is moved onto the painted sheet S fixed and held by the clamper 20, and the female parting surface 14 is moved.
To soften the painted sheet S at the sheet heating position (the illustrated position), and
Vacuum suction is performed by a vacuum suction means including a vacuum suction hole 15 or the like, which is opened to stretch the painted sheet S so as to adhere closely to the female mold cavity (stretching step).

Thereafter, as shown in FIG.
Is advanced to the male mold 30 side, and the male mold 30 and the female mold 12 are clamped to form a molding cavity between the molding dies 12 and 30 (mold clamping step). A resin in a fluid state is injected and filled into the inside, and the obtained injection resin molded body Pr and the above-mentioned painted sheet S are laminated and integrated (injection molding step). Thereafter, the injection resin molded body Pr is completely solidified. Thereafter, the female mold 12 is retracted to the original position, the male and female molds 12 and 30 are opened (mold opening step), and the obtained laminated molded product is taken out from between the male and female molds. After that, a trimming step or the like for trimming a surplus portion of the painted sheet in the laminated molded product is performed.

[0020]

The conventional injection molding simultaneous painting apparatus 10 'as described above has the following problems to be solved. That is, in the conventional apparatus 10 ', the unwinding machine 50, the feed roller 52, and the like constituting the sheet feeding means are attached to the female die 12 so as to move forward and backward integrally therewith. Vibration, shaking, impact, etc., when closing and opening the male and female forming dies 12, 30 are transmitted, whereby the painted sheet is loosened and the positional relationship between the pattern of the painted sheet and the mold is generated. There has been a problem in the supply of the painted sheet, for example, or the holding by the chucks 57 and 54 is not performed properly.

Similarly, the hot platen 80 and the air cylinders constituting the hot platen driving means are also attached to the female die 12 so as to move forward and backward integrally therewith.
There is also a problem that it is difficult to adjust the position (heating position of the sheet with a picture) during the heating step. The present invention has been made in order to solve the conventional problems as described above, and an object of the present invention is to provide an unwinder or the like with vibration and swinging when closing and opening molds of both male and female molds. , Impacts etc. are not transmitted, so that there is no problem in supplying the painted sheet,
Another object of the present invention is to provide a simultaneous painting apparatus for injection molding in which the position of a hot platen during a heating step can be easily adjusted.

[0022]

In order to achieve the above-mentioned object, an injection molding simultaneous painting apparatus according to the present invention basically comprises a female die and a male die, and an unwinding machine. Sheet supply means for supplying one shot of the long strip-shaped painted sheet unwound from the machine onto the female parting surface, and movable in a direction perpendicular to the female parting surface. Clamping means for pressing and holding the painted sheet against the female parting surface; and forming the male and female to heat and soften the painted sheet pressed and fixed on the female parting surface by the clamping means. A hot plate inserted between the molds, vacuum suction means for extending the painted sheet along the cavity of the female mold, and the male mold side in a cavity formed between the female mold and the male mold. Filling of resin in fluid state from Resin injection means, wherein the female mold is advanced and retracted in a direction approaching and separating from the male mold, and at least the unwinding machine of the sheet supply means is independent of the female mold. It is characterized by being installed on a fixed base.

In a preferred aspect, the hot platen is moved by a hot platen driving means independent of the female die in a direction along the parting surface of the female die, and is moved along a moving direction of the female die. The position can be adjusted. The sheet supply means preferably has an unwinder and a transport chuck, and grips the leading end of a long strip-shaped painted sheet unwound from the unwinder with the transport chuck, and divides the shot by one shot. It is adapted to be supplied on a female parting surface.

In a preferred embodiment of the simultaneous painting apparatus for injection molding according to the present invention having such a configuration, at least the unwinder of the sheet feeding means is provided on a fixed base independent from the female mold. In addition, the hot platen is moved by the hot platen driving means independent of the female die in a direction along the parting surface of the female die, and the position of the hot die can be adjusted along the moving direction of the female die. As a result, vibrations, shaking, impacts, etc., during closing and opening of the male and female forming dies are not transmitted to the unwinder or the like. The position of the hot platen during the heating step can be easily adjusted.

Examples of the hot plate include a plate for heating a ceramic plate or a metal plate with a heating wire such as a nichrome wire provided therein, a plate for induction heating or dielectric heating by an electromagnetic field, and a plate for high-temperature steam or the like in a buried tube. Heating by flowing a heat medium, heating by a buried heat pump, and the like are mentioned, and the painted sheet is heated and softened by radiation of heat rays from the surface of the hot platen. Or hot plate (surface heating element)
May be constituted by a sheet-like resistor, which is energized and heated to radiate heat rays.

Further, a heating plate having a uniform heating temperature (radiation amount of heat rays) distribution on the entire heat radiation surface is used.
Further, the shape of the hot plate may be a three-dimensional shape such as a rectangular shape in a side view corresponding to a female parting surface or a cavity shape, in addition to a flat plate shape. In the simultaneous injection molding painting apparatus of the present invention, the male and female molds are made of metal such as iron or ceramics, and small holes (vacuum suction holes, etc.) for vacuum suction or compressed air supply as necessary. Is provided.

Further, the female mold is constituted by an aggregate of a plurality of divided parts (in a so-called nested structure), a slit-shaped gap is formed between adjacent divided parts, and this gap is used as a vacuum suction hole to perform vacuum suction. May be performed. 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 addition, a clamp means is provided for fixing and holding the painting sheet on the female parting surface. As the clamping means, a holding plate or the like having a frame shape or a girder shape in plan view can be used, and its driving is performed by using a molding driving force such as a mold clamping operation or by using the power of an ejector pin driving mechanism. And by separately providing a driving means such as a fluid pressure actuator.

As a method for supplying a sheet with a picture, an unwinding winding method (roll / roll method), or a method in which a leading end of a long continuous belt-like sheet wound in a roll shape is gripped by a transport chuck or the like and a female mold is used. In addition, any one of the supply methods of supplying the sheet onto the parting surface and cutting the sheet every one shot to form a single sheet can be adopted. However, the most preferable method to be applied to the apparatus of the present invention is the latter method in which the sheet is supplied in the form of a roll and made into a single sheet. With this method, it is not necessary to advance the unwinder 50 and the feed roll 52 in synchronization with the advance of the female mold during the mold clamping step of advancing the female mold toward the male mold, and the mechanism is simple. Is preferred.

The painting sheet is composed of a base sheet and a decorative layer laminated thereon, and is a laminated sheet (laminated sheet) used as a final product while the base sheet is in close contact with and integrated with a molded product, or 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, a transfer layer composed of a pattern layer and the like once formed on a releasable support sheet is for transferring to another transfer target, and the transfer sheet is optionally provided on the support sheet. A release layer may be provided, 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 made of nylon 6, nylon 6
A flexible thermoplastic resin film such as a polyamide resin such as No. 6 or the like, a polyolefin resin such as polyethylene or polypropylene, polyvinyl chloride or the like, or a laminate thereof is preferable. 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. 1 to 4 show an embodiment of a simultaneous painting apparatus for injection molding according to the present invention. The laminated product to be obtained by the illustrated simultaneous injection molding apparatus 10 is the same as that manufactured by the apparatus 10 ′ shown in FIGS. Is a rectangular tray-shaped panel, in which a painted sheet S (laminate sheet) having, for example, a wood-grained decorative layer is bonded and laminated on the surface of an injection resin molded product Pr (FIG. 7).

The apparatus 10 includes a female mold 12 and a male mold 30 having an uneven shape corresponding to the laminated product.
The bottom (left end side in the figure) is fixed to the movable platen 2,
The ram 4 of the fluid pressure cylinder 3 moves forward and backward in a horizontal direction (X direction in FIG. 1), in other words, in a direction approaching and separating from the male mold 30. The four corners of the movable platen 2 and the fixed platen 44 in order to move the female die 12 forward and backward while preventing the female die 12 from being displaced in a direction (for example, the Z direction in FIG. 1) perpendicular to the forward and backward movement direction due to the influence of gravity or the like. And a total of four tie bars 70 inserted into the through holes
It is preferable that the tie bar 2 and the through holes at the four corners of the movable platen 2 slide and move forward and backward with respect to the male mold 30 in a preferred embodiment.

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 form in which the female dies are vertically opposed to each other and one of them (in this case, the female dies are usually moved) in the vertical direction. A cavity 13 corresponding to the laminated product to be obtained is formed in the female mold 12, and the painted sheet S is
As shown in FIG. 2, a number of vacuum suction holes 15, 1
Are opened, and the vacuum suction holes 15, 15,
Are connected to a vacuum source (not shown) including an external vacuum pump and the like via a vacuum suction passage 18 and a conduit 19.

Further, the parting surface 1 of the female mold 12
On the outer peripheral side of 4, an annular mounting groove 23 in which an O-ring 22 is mounted is provided. In the O-ring 22, a clamper 20 having a rectangular frame shape or a cross-girder shape whose plan view (as viewed in the X direction) described later is pressed against the parting surface 14 of the female mold 12 with the painting sheet S interposed therebetween. At this time, it serves to hermetically shut off the cavity 12 from the outside. On the other hand, the male mold 30 is provided with the nozzle 4 of the injection molding machine 40.
2 is fixed to a fixed platen 44 on which the male core 30 has a convex core 31 corresponding to the shape of the laminated product.
Is provided, and a runner 32 for injecting the molten resin and a gate 33 connected to the runner 32 are provided therein.

The female mold 12 is provided with a clamper having a rectangular frame shape or a cross-girder shape in plan view so as to press and hold the supplied one-shot painting sheet S on the parting surface 14. 20 are provided. This clamper 20 has four sliding rods 2 connected to its four corners.
A drive means (not shown) can move forward and backward in the direction perpendicular to the parting surface 14 (the X direction in the figure) through the drive means 4.

On the other hand, above the female mold 12 (on the upstream side when viewed in the sheet supply direction), a roll for supplying a painting sheet (laminated sheet) S on the parting surface 14 of the female mold 12 is formed. An output device 50, a pair of feed rollers (nip rollers) 52, a guide roller 53, a transport chuck 57 of an open / close nip type, and a sheet cutting device 60 are provided.
The unwinding machine 50, the feed roller 52, the guide roller 53, and the sheet cutting device 60 are mounted on the fixed base 5, which is assembled in a tower shape so as to surround the peripheral sides of the female die 12 and the movable platen 2. Mounted and held. The transfer chuck 5
Reference numeral 7 denotes the parting surface 1 of the female mold 12 by gripping the leading end of the painting sheet S unwound from the unwinding machine 50 loaded with the long strip-shaped painting sheet (sheet roll).
4 is conveyed from top to bottom and near the lower end thereof, and the conveyance chuck 57 is a chuck downwardly supported by a support member (not shown) provided on the fixed base 5. Attached to the tip of the piston rod 58 of the driving cylinder, the chuck driving cylinder passes between the female parting surface 14 and the clamper 20 from a standby position shown by a solid line in FIG. It is lowered (in phantom line in FIG. 1) and raised straight along the Z direction = vertical direction.

An opening / closing type for temporarily holding and fixing the sheet S with a picture is provided below the male and female molds 12 and 30 (on the downstream side when viewed in the sheet feeding direction). The fixed chuck 54 is mounted and arranged via a support member 56. The transport chuck 57 and the fixed chuck 54 are configured such that their opening and closing chuck portions 57a and 54a can be opened and closed by an air cylinder or the like (not shown).
In a, a comb-shaped irregularity is formed so that the leading end of the sheet S with a picture can be reliably grasped and delivered. See JP-A-10-180794).

Further, the sheet cutting device 60 disposed above the female die 12 is provided with the following. One or a plurality of cutting air cylinders 62 and one or more cutting air cylinders
2, a sheet S with a picture provided at the tip of the piston rod
A wide cutting blade (cutter) 65 for cutting in the width direction;
Consists of As the cutting blade, a heating wire can be used in addition to a simple blade.

Further, a hot platen 80 as shown in FIG. 3 is provided for preforming. The hot platen 80 is the female mold 1
2 is moved in the direction (Y direction) along the parting surface 14 of the female die 12 by a hot platen driving mechanism 81 that is arranged independently from one side of the female die 12, and the female die 12 moves forward and backward ( Along the X direction). That is, the hot platen driving mechanism 81 is
An X-direction drive cylinder 82 held laterally by a support member 9 disposed at a distance from one side thereof, and a Y-direction drive cylinder (rodless) fixed vertically to the tip of a piston rod 83 of the cylinder 82. ) Cylinder 85, and the hot platen 80 is attached and held in the Y direction via a connecting member 87 to a slider 86 of the Y direction driving (rodless) cylinder 85.

The hot platen 80 is formed by the male and female forming dies 12 and 30 by the Y-direction driving (rodless) cylinder 85.
From the outermost outermost standby position, the sheet is inserted between the dies (solid line in FIG. 3), and the X-direction driving cylinder 82 is used to heat the painted sheet heating position on the parting surface 14 of the female die 12. (The position shown in the figure) (the imaginary line in FIG. 3), so that the painted sheet S is heated and softened. Here, the hot platen 80 heats the sheet S with a picture by a non-contact heating method using infrared radiation. However, it is also possible to heat the painted sheet by heat conduction using a contact heating type heating plate.

In performing simultaneous injection molding painting by the injection molding simultaneous painting apparatus 10 having the above-described configuration, first, the painted sheet S is firstly placed on the female parting surface 14.
As shown in FIG.
1 is gripped by the transport chuck 57, and the piston rod 58 of the chuck driving cylinder is protruded to move the transport chuck 57 in FIG. As shown by the imaginary line in FIG. 1, from the standby position shown by the solid line, to the position where it can be delivered to the fixed chuck 54, it is lowered straight down in the direction along the female parting surface 14 and conveyed. The opening / closing chuck portion 57a of the chuck 57 is opened, and the fixed chuck 5 is opened.
4, the opening / closing chuck portion 54a is closed, and the leading end of the sheet S with the picture is transferred to the fixed chuck 54 side. Thereafter, the piston rod 58 of the air cylinder for driving the chuck is pulled in so that the transport chuck 57 is brought into contact with the female parting surface. Raise straight along 14. Then, as shown by the solid line in FIG. 1, the transport chuck 57 grips and fixes the picture sheet S at the upstream portion of the female die. As a result, the one-shot picture-added sheet S is supplied onto the female parting surface 14 (sheet supply step).

In this way, the sheet S with the picture is
After being supplied onto the parting surface 14 of FIG. 2, if necessary, the unwinder 50 is rotated in the reverse direction to apply tension to the painted sheet S, thereby extending the thickness of the painted sheet S. As shown in the figure, the clamper 20 is advanced toward the parting surface 14 and the picture sheet S is pressed against the parting surface 14 by the clamper 20 and fixedly held (clamping step).

At the same time as the completion of this clamping step, the opening / closing chuck portion 57a of the transport chuck 57 is closed,
While holding the picture sheet S, the piston rod of the cutting air cylinder 62 is protruded, and the picture sheet S is cut in the width direction by a cutting blade 65 provided at the tip end thereof. (Sheet cutting step). In this manner, after the clamping process, the pictorial sheets for the current shot are separated from the pictorial sheets subsequent to the next shot and the unwinder 50, the sheet feed roller 52, the guide roller 55, and the transport chuck 57 accompanying the pictorial sheets. In the subsequent mold clamping step, there is no need to synchronize the next shot with the advance of the female mold, and the sheet supply means is simplified.

Subsequently, as shown in FIG.
Is inserted between the male and female molds 12-30 from an external standby position by the hot platen driving mechanism 81, and the X
The cylinder is moved to the female mold 12 side by the directional drive cylinder 82, and is moved to a sheet heating position (a virtual line position in the drawing) on the painted sheet S fixed and held by the clamper 20 to adjust the position. At the sheet heating position, the painted sheet S is heated and softened, and the female cavity 1 is heated.
Vacuum suction is performed by vacuum suction means including vacuum suction holes 15 and the like that are opened at 3, so that the painted sheet S is stretched so as to adhere closely to the female mold cavity (stretching step).

Thereafter, as shown in FIG. 4, the female mold 12 is advanced toward the male mold 30 by the ram 4 of the fluid pressure cylinder 3, and the male mold 30 and the female mold 12 are clamped. A molding cavity is formed between the two molds 12 and 30 (mold clamping step). Subsequently, a resin in a flowing state is injected and filled into the molding cavity, and the obtained injection resin molded body and the above-mentioned sheet S are laminated. (Injection molding step). After the injection resin molded body Pr is completely solidified, the female mold 12 is retracted to the original position, and the male and female molds 1
Opening of the molds 2 and 30 is performed (opening step), the obtained laminated molded product is taken out from between the male and female molds, and thereafter, a trimming step of trimming an excess portion of the painted sheet in the laminated molded product is performed. .

In the simultaneous injection molding and painting apparatus 10 of the present embodiment having the above-described configuration, the unwinding machine 50, the feed roller 52, the guide roller 53, and the transport chuck 57 of the sheet supply means are female. It is installed on the fixed base 5 independent of the mold, and the hot platen 80 is
From the female mold 12 by a hot plate drive mechanism 81 independent of
Of the female die 12 (X direction)
, The vibration, shaking, impact, etc., during the closing and opening of the male and female forming dies 12, 30 are not transmitted to the unwinder 50 or the like. In addition to preventing supply problems,
The position of the hot platen 80 during the heating step can be easily adjusted.

[0049]

As will be understood from the above description, in the simultaneous injection molding apparatus according to the present invention, in the preferred embodiment of the simultaneous injection molding apparatus according to the present invention having such a configuration, the sheet feeding is performed. At least one of the unwinders is installed on a fixed base independent of the female mold, and the hot platen is separated from the female mold by hot platen driving means independent of the female mold. It is moved in the direction along the surface, and the position can be adjusted along the advance and retreat direction of the female mold. Shaking, impact, and the like are not transmitted, so that it is possible to prevent a problem in supplying the sheet with a picture and to easily adjust the position of the hot platen in the heating step.

[Brief description of the drawings]

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

FIG. 2 is a partially cutaway view showing a heating step of the apparatus shown in FIG.

FIG. 3 is a plan view of the device shown in FIG. 1;

FIG. 4 is a front view showing a mold clamping step of the apparatus shown in FIG. 1;

FIG. 5 is a longitudinal sectional view showing the entire configuration of a conventional simultaneous injection molding painting apparatus.

FIG. 6 is a longitudinal sectional view for explaining a heating step of the apparatus shown in FIG. 5;

FIG. 7 is a longitudinal sectional view for explaining an injection molding process of the apparatus shown in FIG. 5;

[Explanation of symbols]

 S Painting Sheet 3 Fluid Pressure Cylinder 4 Ram 5 Fixed Base 10 Injection Molding Simultaneous Painting Apparatus 12 Female Die 13 Cavity 14 Parting Surface 50 Unwinder 52 Feed Roller 54 Fixed Chuck 57 Transfer Chuck 80 Hot Plate 81 Hot Plate Drive Mechanism 82 X direction driving cylinder 85 Y direction driving cylinder

Claims (3)

[Claims] 1. A sheet which has a female type and a male type, and an unwinder, and supplies one shot of a long strip-shaped painted sheet unwound from the unwinder onto the female parting surface. A supply unit, a clamp unit that is movable in a direction perpendicular to the female parting surface, and presses and fixes and holds the painting sheet against the female parting surface; A hot plate inserted between the male and female molds to heat and soften the painted sheet pressed and fixed on the mold parting surface; and a vacuum suction means for extending the painted sheet along the cavity of the female mold. And resin injection means for injecting and filling a resin in a fluid state from the male mold side into a cavity formed between the female mold and the male mold,
Wherein the female die is advanced and retracted in a direction to approach and separate from the male die, and at least the unwinder of the sheet supply means is installed on a fixed base independent from the female die. A simultaneous painting apparatus for injection molding. 2. The hot platen is moved by a hot platen driving means independent of the female die in a direction along a parting surface of the female die, and is adjusted in position along a direction in which the female die moves forward and backward. 2. The simultaneous injection molding and painting apparatus according to claim 1, wherein the apparatus is capable of being simultaneously painted. 3. The sheet supply means has an unwinder and a transport chuck, and grips the leading end of a long strip-shaped picture sheet unwound from the unwinder by the transport chuck and holds the leading end of the sheet by one shot. 3. The simultaneous injection-molding and painting apparatus according to claim 1, wherein the apparatus is supplied on the parting surface of the female mold.