JPH11291283A - Injection molding simultaneous patterning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject apparatus capable of being contracted in its occupying space in a direction along a patterned sheet feed direction as compared with a conventional one and capable of rapidly and properly supplying a patterned sheet to the parting surface of a female mold. SOLUTION: A patterned sheet supply means is equipped with a feed chuck 50 grasping the leading end part Sa of a patterned sheet S in the vicinity of the upstream side end part 12A of a female mold 12 in a patterned sheet feed direction to pull the same to the vicinity of the downstream side end part 12B of the female mold 12 to feed the sheet S and a wrapping connection driving mechanism 61 equipped with an endless annular member 69 reciprocally moving the feed chuck 50 between the vicinity of the upstream side end part 12A and that of the downstream side end part 12B or a feed chuck drive means 60 taking a form of an endless track.

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 an injection molding simultaneous painting apparatus which obtains the following.

[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 mold and a male mold. 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 added 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]

However, in performing the simultaneous painting by injection molding as described above, a sheet supplying step of supplying a painted sheet to the female parting surface every shot (molding) is essential. In an injection molding simultaneous painting apparatus that performs simultaneous injection molding painting, usually, a long strip-shaped painting sheet wound up in a roll shape is moved from the front end side by one.
A picture-sheet feeding means is provided for sequentially unwinding the shots one by one and transporting one shot on the leading end side of the unrolled picture sheet onto the female parting surface.

[0008] The means for supplying a sheet with a picture can be roughly divided into two types depending on the transport system. One of them is to install an unwinder and a take-up machine on the upstream side and the downstream side, respectively, as seen in, for example, Japanese Patent Application Laid-Open No. 5-318523, in the conveying direction of the painted sheet in the female mold. Then, the painting sheet is taken out from the unwinding machine by one shot at a time and wound up by the winding machine, and an unwinding and winding system (roll / roll system) is used. As disclosed in Japanese Unexamined Patent Publication No. 6-315950, etc., a transport chuck and a receiving fixed chuck are provided, and the transport chuck is used to move the leading end of the painted sheet near the upstream end when viewed in the transport direction of the painted sheet in the female mold. A cooperating chuck that grips and pulls to the vicinity of the downstream end of the female die and conveys it, and receives and grips and fixes the leading end of the picture sheet conveyed by this conveyance chuck with the receiving and fixing chuck. It is intended to take.

The above-mentioned roll / roll type painting sheet supply means is suitable when the painting sheet is a transfer sheet. That is, as described above, when the painted sheet is a transfer sheet, the support sheet of the painted sheet integrated with the surface of the injection resin molded body is peeled, and the peeled support sheet is formed into a female mold. By winding with a winder on the downstream side, the next shot is supplied onto the female parting surface, and at the same time, the unnecessary support sheet is discharged out of the female mold. is there.

However, when the painted sheet is a laminated sheet (laminated sheet), in the case of the above-mentioned roll / roll method, at the same time as molding, a molded product (painted sheet) from a painted sheet (the whole including an excess portion) is formed. Cutting (trimming) process of the laminated product with the sheet bonded)
Since equipment is required, it is not usually employed. In addition to this, since the roll / roll type painted sheet supply means needs to install a winder or the like on the downstream side in the conveying direction of the painted sheet in the female mold, the space occupied by the apparatus, particularly, There is also a disadvantage that the occupied space in the direction along the painting sheet transport direction becomes long. For this reason, when the painting sheet is a laminate sheet, the above-mentioned cooperative chuck type is often adopted as the painting sheet supply means.

However, the conventional cooperative chuck type painting sheet supply means has the following problems. That is, in the case of the cooperative chuck type, in addition to the transport chuck that grips and transports the leading end of the painted sheet, a receiving and fixing chuck that receives and grips and fixes the leading end of the painted sheet is necessary, and When transferring the unit from the transport chuck to the receiving fixed chuck, the transport chuck may be switched from the closed state where the pictorial sheet is gripped to the open state where the pictorial sheet is released, and the receiving fixed chuck may be switched from the open state to the closed state. Required, the chuck control operation becomes complicated,
The transport chuck that transfers the leading end of the painted sheet to the receiving fixed chuck interferes with the subsequent clamping process, mold clamping process, etc. (The transport chuck driving member such as a piston rod, which will be described later, is also on the female parting surface. Therefore, it is necessary to return to the vicinity of the upstream end of the female mold immediately after the conveyance, so that the sheet feeding process is likely to cause an error, and it takes a relatively long time, so that one molding cycle is disliked. .

[0012] Further, the transport chuck gripping the leading end of the painted sheet can be moved from near the upstream end to the receiving fixed chuck installed near the downstream end when viewed in the transport direction of the painted sheet in the female mold. That is, it is necessary to vertically or traverse the transport chuck on the female parting surface. In this case, as a transport chuck driving unit for moving the transport chuck, a fluid pressure cylinder, a ball screw feed mechanism, or the like is usually used. However, the transport chuck driving means needs to be disposed on an extension of the transport path of the transport chuck (the sheet-transport path with the picture), that is, on the upstream side of the female mold, due to the characteristics of the mechanism. It requires a length (cylinder length or the like) larger than the distance (at least the distance from the vicinity of the upstream end to the vicinity of the downstream end of the female mold).

For this reason, in the case of the cooperative chuck system,
On the upstream side of the female mold, an extremely large space for installing the transfer chuck driving means is required. In this case, the space occupied by the entire apparatus, particularly, the space occupied in the direction along the painting sheet conveyance direction is long. There was a problem that would be.

In the case where the transport chuck driving means composed of a fluid pressure cylinder or the like as described above is used, the transport chuck is attached to a free end of a long drive member (for example, a tip of a piston rod of the fluid pressure cylinder). Therefore, the conveyance chuck easily swings and becomes unstable, and the position of the leading end of the sheet with the picture is shifted with respect to the receiving fixed chuck, and the leading end of the sheet with the painting is properly moved to the receiving fixed chuck. In some cases, it could not be delivered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An object of the present invention is to reduce the occupied space in the direction along the picture-sheet conveying direction as compared with the conventional art and to reduce the size of the picture-sheet. An object of the present invention is to provide an injection molding simultaneous painting apparatus which can be supplied quickly and properly onto a female parting surface. Other objects of the present invention will become clear from the following description.

[0016]

In order to achieve the above-mentioned object, an injection molding simultaneous painting apparatus according to the present invention basically comprises a female mold and a male mold, and a long strip-shaped roll wound up in a roll shape. And a sheet feeding means for conveying one shot of the front side of the sheet to the female parting surface.

[0017] The painted sheet supply means grips a leading end of the painted sheet near an upstream end when viewed in a conveying direction of the painted sheet in the female mold, and grips a vicinity of a downstream end of the female mold. A transport chuck that pulls and transports the transport chuck, and is provided at one or both sides between the vicinity of the upstream end and the vicinity of the downstream end in the female mold, and holds the transfer chuck at the upstream end. And a transport chuck driving means for reciprocating between the vicinity and the vicinity of the downstream end.

The transport chuck driving means is provided on one side or both sides of a female mold,
In addition, it is sufficient that the transport chuck can be reciprocated so as to vertically or traverse the female mold. Preferred examples include a winding transmission mechanism having an endless annular member or an endless track. .

More specifically, a rotating member such as a pair of pulleys or sprocket wheels rotatably disposed near the upstream end and near the downstream end of the female side, respectively. An endless annular member such as a belt or chain wound around the pair of rotating members along one side or both sides of the female mold, and a connecting member for connecting the transport chuck and the endless annular member. And a drive source such as a motor that rotationally drives the rotating member.
In a preferred specific embodiment, a guide rail portion is provided on the side of the female mold, and a rolling element or a slider that contacts the guide rail portion is provided on the connecting member.

In another preferred aspect of the apparatus of the present invention, the male mold is provided with a clamp means for pressing and fixing the painting sheet supplied on the female parting surface to the parting surface. . In this case, as a more specific preferred embodiment, the clamp means includes a rectangular frame-shaped or cross-girder-shaped clamper, and a protrusion drive means such as a fluid pressure cylinder that projects the clamper toward the female parting surface. Is composed of

Furthermore, the male die preferably accommodates the transport chuck that has pulled and transported the painted sheet to the vicinity of the downstream end of the female die in a mold-clamped state with the female die. A notch recess is provided, and more preferably, the male die is provided with a picture supplied on the parting surface of the female die in the vicinity of the upstream end of the female die when clamping with the female die. A sheet cutting means such as a cutter or a heating wire for separating one shot on the leading end side of the sheet from a subsequent portion is provided. In this case, it is preferable to provide, near the upstream end of the female mold, a groove-shaped accommodation section capable of accommodating the sheet cutting means in a state of being clamped to the male mold. In a preferred embodiment of the simultaneous injection molding painting apparatus according to the present invention having such a configuration, the painting sheet supply step is performed as follows in performing the injection molding simultaneous painting.

First, the leading end of the painted sheet is gripped by the transport chuck near the upstream end of the female die, which is its initial position. In this state, if necessary, the unwinder is rotated forward to remove the painted sheet. While unwinding, for example, a winding transmission mechanism provided with an endless annular member or a transport chuck driving means in the form of an endless track is rotationally driven in one direction (forward rotation direction). Thereby, the endless annular member rotates in the forward direction, and in conjunction with this, the transport chuck travels on the female parting surface and moves from near the upstream end to near the downstream end of the female mold. Then, along with this, the leading end of the painted sheet is pulled and conveyed to the vicinity of the downstream end so that the leading end of the painted sheet runs longitudinally or across the female mold, and one shot of the leading end of the painted sheet is female parting. Supplied on the surface.

After the painted sheet is supplied on the female parting surface in this way, the transport chuck driving means is temporarily stopped, and the transport chuck is held in the female mold while holding the leading end of the painted sheet. It is stopped near the downstream end, and in this stopped state, a subsequent process, a clamping process,
After performing a heating softening step, a mold clamping step, an injection molding step, and the like, and further performing a mold opening step, the transport chuck driving unit is rotationally driven in the other direction (reverse rotation direction). As a result, the endless annular member is rotated in the opposite direction, and in conjunction with this, the transport chuck, which has been switched from the sheet gripping state to the released state at an appropriate time after the clamping step, moves on the female parting surface. To move from the vicinity of the downstream end of the female mold to the vicinity of the upstream end to return to the original initial position, and to hold the leading end of the next shot of the painting sheet to prepare for the next shot.

As described above, in the apparatus of the present invention, the receiving / fixing chuck provided in the above-mentioned conventional cooperative chuck type painting sheet supplying means is not required, and the transport chuck also serves as the receiving / fixing chuck. Therefore, it is not necessary to carry out the operation of transferring the leading end of the sheet with the picture from the transport chuck to the fixed receiving chuck, and the control operation of the chuck becomes simple and easy. Further, in the conventional apparatus, after the painting sheet supplying step and before the clamping step, the transport chuck had to be returned to the original initial position (near the female upstream end), but in the apparatus of the present invention, the transport chuck is You can stay near the downstream end of the female mold. Therefore, the sheet supply process can be performed properly in a short time, and one molding cycle can be shortened, as compared with the related art.

Also, a mechanism that requires a long occupied space upstream of the female mold, such as a fluid pressure cylinder or a ball screw feed mechanism installed outside the female mold, is not used as the transport chuck driving means. Since a winding transmission mechanism having endless annular members provided on one side or both sides or a form of an endless track can be adopted, a large space is not required on the upstream side of the female mold, and the space occupied by the entire apparatus is not required. In particular, the occupied space in the direction along the painting sheet transport direction can be reduced.

Further, by using a winding transmission mechanism provided with an endless annular member or one having an endless track as described above as the transport chuck driving means, a relatively long section comprising a fluid pressure cylinder or the like is used. As compared with the case where the transport chuck driving means is used, the transport chuck is less likely to oscillate, and the sheet with a picture can be stably and quickly supplied onto the female parting surface.

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 a 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. Further, a clamping means is additionally provided to press and fix the painting sheet on the female parting surface. The clamp means may be provided on either the female type or the male type. However, in the apparatus of the present invention, it is preferable to provide the clamp type on the male type in order to easily avoid the interference of the transport chuck and the transport chuck driving means. .

As the clamping means, a rectangular frame-shaped or girder-shaped pressing plate or the like can be used, and its driving is performed by, for example, a protruding driving means such as a hydraulic cylinder attached to a male mold. The painted sheet is composed of a base sheet and a decorative layer laminated on the base sheet. The laminated sheet (laminated sheet) used as the final product while the base sheet is tightly integrated with the molded product, or a once-painted sheet Use any transfer sheet that separates the base sheet (support sheet) after integrating the molding and the molded product, leaving only the decorative layer (transfer layer) on the injection resin molded product (molded product) side. However, the apparatus of the present invention is particularly difficult to adopt the unwinding and winding system (roll / roll system) as the painting sheet supply means, and provides more advantages when the painting sheet is a laminated laminated sheet.

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 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. The resin for injection molding is a liquid or fluid state obtained by heating and melting a thermoplastic resin such as ABS (acrylonitrile-butadiene-styrene copolymer) resin, polystyrene, polyvinyl chloride, acrylic resin, polycarbonate resin, etc. Or, a two-part curing type, a catalyst-curing type resin, for example, a material conventionally known for painting simultaneously with injection molding such as an uncured liquid such as a urethane resin or a polyester resin can be used, and the required physical properties and It is selected according to cost etc.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 7 to 9 are overall configuration diagrams showing steps in one embodiment of the simultaneous injection-molding and painting apparatus according to the present invention, and FIGS. 2 to 6 are diagrams of a painting sheet supply means in this embodiment. It is a figure provided for explanation.

The laminated product to be obtained by the simultaneous painting apparatus 10 of the present embodiment is a panel having a rectangular shape and a U-shaped cross section in plan view, as can be clearly understood from the injection molding process shown in FIG. And a sheet S with a picture attached by adhesion on the surface of the injection molded resin Pa. Here, as the above-mentioned painted sheet S, a base sheet made of acrylic resin (having a thickness of 125 μm) and a decorative layer (one of acrylic resin and vinyl chloride-vinyl acetate copolymer) laminated thereon by a gravure printing method are used. : 1 weight ratio mixture of an ink pattern layer composed of a binder and a pigment) and an adhesive layer (a vinyl chloride-vinyl acetate copolymer system), while the base sheet is tightly integrated with the injection molded resin Pa. A laminated sheet (laminated sheet) used as a final product 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
This is a layer having a thickness of 2 μm formed twice (by gravure printing in two colors) using a gravure solid printing plate having a screen line number of 40 lines / cm (plate depth 60 μm) twice.

Injection molding simultaneous painting apparatus 10 of this embodiment
Has a female mold 12 and a male mold 25 having an uneven shape corresponding to the above-mentioned laminated product to be obtained. The female mold 12 has a bottom fixed to the movable platen 11 and is horizontally moved by the ram 9 of a fluid pressure cylinder. Direction (X direction in FIG. 1), in other words, male mold 2
5 is moved forward and backward in a direction approaching to and away from 5. In the present embodiment, the female die 12 is a movable die as described above and is configured to move in the horizontal direction. However, the present invention is not limited to this. It is also possible to adopt a form in which one of them is 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.
As shown in FIG. 8, a cavity 13 corresponding to the laminated product is formed in FIG.
A parting surface 14 is formed on the outer peripheral side of the cavity 13. Around the cavity 13 on the inner peripheral side of the parting surface 14, an annular continuous cross-section rectangular sheet fixing suction groove 16 for vacuum suction of the painting sheet S is formed so as to surround the cavity 13. A predetermined number of vacuum suction holes 17 are opened at a predetermined pitch in the sheet fixing suction groove 16 (see also FIG. 4).

A slit-like gap 15 acting as a vacuum suction hole is formed between the split molds in the female mold 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.
The reason why the slit-shaped gap 15 is opened at the boundary part is that the boundary part has the most noticeable traces of the filaments left on the laminated product due to the presence of the gap 15 used as a vacuum suction hole. There is no place.

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. (Not shown) constitutes a vacuum suction means.

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. When the O-ring 22 is pressed against the parting surface 14 of the female die 12 with the rectangular frame-shaped or cross-girder-shaped clamper 20 provided on the male die 25 side described later being pressed with the painting sheet S therebetween. It serves to hermetically block the cavity 12 from the outside (see FIG. 8).

On the other hand, although not shown, the male mold 25 is fixed to a fixed platen to which a nozzle of an injection molding machine is mounted, and the male mold 25 is shown in FIGS. As can be clearly understood, a convex portion (core portion) 26 corresponding to the shape of the laminated product to be obtained is provided, and a runner 27 for injecting the molten resin and a gate 28 connected to the runner 27 are provided therein.

The male mold 25 is provided with a clamper 20 having a rectangular frame-like or cross-girder shape in plan view for pressing and fixing the picture sheet S to the female parting surface 14. Clamping means including, for example, four hydraulic cylinders 24 protruding toward the mold parting surface 14 is provided. Further, the male mold 25 has an accommodation groove 32 for accommodating the clamper 20. I have.

In addition to the above configuration, as shown in FIGS. 1 and 2, unwinding in which a long strip-shaped painting sheet (roll) S wound up in a roll shape is loaded above the female die 12. Machine RS, a pair of feed rollers 42, 42, a guide roller 43 for unwinding the painting sheet S from the unwinding machine RS, and the upstream end 12 </ b> A of the female die 12 in the conveying direction of the painting sheet S. Arranged slightly above,
A pair of sheet guides 44, 44 capable of holding and releasing the painted sheet S is provided. These members are supported by the female mold 12 by supporting means (not shown).
Alternatively, it is connected and supported by the movable platen 11 so that it can move integrally therewith. Here, the sheet guides 44, 44 can selectively take a closed state (FIG. 1) in which the picture sheet S is sandwiched and an open state (FIG. 7) in which the sheet S is released, like a chuck. However, it is not always necessary to open and close in this way, and simply the painted sheet S
May function only as a guide member for guiding the insertion.

In this embodiment, one shot on the leading end side of the long strip-shaped picture sheet S wound up in a roll shape is provided around the female mold 12 on the parting surface 14 of the female mold 12. A picture sheet supply means for conveying the sheet upward is provided. This painting sheet supply means is shown in FIGS.
As can be understood by referring to FIG.
The leading end portion Sa, which slightly protrudes downward from the sheet guides 44, 44 in one shot on the leading end side of the painted sheet S sandwiched by the guides 4, 44, in the conveying direction of the painted sheet S in the female mold 12. A transport chuck 50 that grips the vicinity of the upstream end 12A and pulls it to the vicinity of the downstream end 12B of the female mold 12 to transport the same. The transport chuck 50 is located near the upstream end 12A and the downstream end. And a transport chuck driving mechanism 60 that reciprocates between and near the portion 12B.

5 and 6, the transport chuck 50 is disposed on the female parting surface 14 in parallel to the width direction (Y direction) of the painted sheet S. Fixed side gripping plate 51 elongated along
And a movable-side gripping plate 52 arranged mirror-symmetrically to this,
The fixed side gripping plate 51 and the movable side gripping plate 52 selectively take a closed state (FIG. 6 (A)) in which the painted sheet S is gripped and gripped and an open state (FIG. 6 (B)) in which it is released. To
Insertion holes 5 formed at both ends of the movable side grip plate 52
Air cylinders 56, 56 disposed and fixed at both ends of the movable side grip plate 52 with the piston rod 56 a facing the end surfaces 8, 58 (FIG. 6), and near the both ends of the movable side grip plate 52. The front end of the support pin 54 is fixed to the fixed side grip plate 51 through the insertion holes 59, 59 (FIG. 6) formed in the support pin 54, and the rear end of the support pin 54 is fixed to an L-shaped connecting member 75 described later. , 54 and the support pins 54, 54
And a coil spring 55 mounted on the outer periphery of the L-shaped connecting member 75 and compressed between the movable-side gripping plate 52, and when the air cylinder 56 is in a non-operating state, As shown in FIG. 6, the movable holding plate 52 is urged by the coil spring 55 toward the fixed holding plate 51.
As shown in FIG. 6A, when the fixed-side holding plate 51 and the movable-side holding member 32 take a closed state in which the sheet S with a picture is pressed and held, and the air cylinder 56 is extended, FIG. As shown in FIG.
a comes into pressure contact with the fixed-side holding plate 51, and the reaction causes the movable-side holding plate 52 to be pushed down against the urging force of the coil spring 55, and the fixed-side holding plate 51 and the movable-side holding plate 5 are pressed down.
2 is in an open state in which the gripping state of the painted sheet S is released and released.

A relatively large sheet guide is provided at the end of the fixed side grip plate 51 and the movable side grip plate 52 on the side of the picture sheet insertion side in order to facilitate the insertion of the leading end Sa of the picture sheet S between them. (See FIG. 1 etc.). On the other hand, the transport chuck driving mechanism 60 is provided on both sides 12 in the left-right direction (Y direction) of the female mold 12 between the vicinity of the upstream end 12A and the vicinity of the downstream end 12B.
L, 12R are provided with belt pulley-type winding transmission mechanisms 61, 61. This winding transmission mechanism 61, 6
As shown in FIG. 3 and FIG. 4, bearings 1 are provided on the upper side and the lower side of the female mold 12, respectively.
Rotating shaft 6 rotatably supported by 64 and 67, 67
3, 66, a servomotor 70 for rotatingly driving the lower rotating shaft 66, and integrally attached to both ends of the rotating shafts 63, 66, both sides of the female die 12 in the left-right direction (Y direction). The upstream end 12 in the portions 12L and 12R
A and a pair of pulleys 65, 65, 68, 68 that are rotatably disposed near A and near the downstream end 12 </ b> B, respectively.
And a belt 69 wound between the pair of pulleys 65-68, 65-68 along both sides 12L, 12R of the female mold 12, and connects the belt 69 and the transport chuck 50. And an L-shaped connecting member 75.

Here, the lower end of the support pin 54 of the transport chuck 50 is fixedly connected to the L-shaped connecting member 75, and the belt 6 is located near the center of the L-shaped connecting member 75.
9 is integrally connected to a coupling plate 76 fixed to the outer peripheral surface side. Further, both sides 12L of the female mold 12,
Guide rail portion 7 extending in the vertical direction (Z direction) at 12R
2 and a guide groove 7 having the guide rail portion 72 as a partition wall
The L-shaped connecting member 75 is provided with rollers 7 as guide rolling elements which are inserted into the guide grooves 73 and 74 and abut against the guide rail portions 72.
7, 77 are provided. The guide groove 74 is provided with a projection 74a (FIGS. 3 and 5) for preventing the roller 77 from falling off.

Further, in addition to the above, the male mold 25 includes:
In the mold-clamped state with the female mold 12 (FIG. 9), a notch recess 36 is provided which can accommodate the transport chuck 50 that has pulled and transported the painted sheet S to the vicinity of the downstream end 12B of the female mold 12. In the male mold 25, at a position facing the vicinity of the upstream end 12A of the female mold 12, at the time of clamping with the female mold 12, at the vicinity of the upstream end 12A of the female mold 12, A cutter 35 is provided for separating one shot on the leading end side of the painting sheet S supplied on the parting surface 14 of the female mold 12 from a subsequent portion, and the male mold is provided near the upstream end 12A of the female mold. In the mold clamping state with the mold 25 (FIG. 9), the cutter 45
Is provided. Injection molding simultaneous painting apparatus 1 of this embodiment having such a configuration
In the case of 0, the simultaneous painting with injection molding is performed as follows.

First, in order to perform a painting sheet supply step of supplying one shot on the leading end side of a long strip-like painting sheet S wound up in a roll shape onto the parting surface 14 of the female mold 12, FIG. As shown in FIG.
In the vicinity of the upstream end 12A of the female die 12, which is the initial position, the leading end Sa of the sheet S with the picture is gripped. In this state, if necessary, the unwinder RS or the feed rollers 42,
2 is rotated forward to unwind the sheet S, and the sheet guides 44, 44 are opened, and the servo motor 70 of the transport chuck driving mechanism 60 is moved in one direction (forward direction).
To rotate. As a result, as shown in FIG. 7, the half of the belt 69 on the side to which the L-shaped connecting member 75 is connected is rotationally moved in the forward direction (the direction from top to bottom in FIG. 7). In conjunction with this, the transfer chuck 50 travels on the female parting surface 14 and moves from the vicinity of the upstream end 12A to the vicinity of the downstream end 12B of the female die 12, and, accordingly, Said picture sheet S
Is pulled and conveyed to the vicinity of the downstream end portion 12B so that the leading end portion Sa of the female sheet 12 extends vertically, and one shot of the leading end side of the picture sheet S is supplied onto the female parting surface 14. You.

After the painted sheet is supplied onto the female parting surface in this manner, the transport chuck driving mechanism 60 is temporarily stopped, and the transport chuck 50 is held while holding the leading end portion Sa of the painted sheet S. The female mold 12 is stopped near the downstream end 12B. Subsequently, as shown in FIG. 8, the four hydraulic cylinders 24 attached to the male mold 25 are extended and the clamper 20 is protruded toward the female parting surface 14. The painting sheet S being conveyed and supplied by the conveyance chuck 50 by the parting surface 1 of the female die 12
4 (clamping step).

Subsequently, the hot platen 40 is heated from the stand-by position outside the male and female molds (here, to the right of the female mold 12) in the opposite direction between the male and female molds (on the parting surface 14 of the female mold 12). The heating plate 40 is moved to a position (the position shown in FIG. 8), and the heating plate 40 performs a heating softening step of heating and softening the painted sheet S.
The painted sheet S is vacuum-sucked through the above-described vacuum suction holes 17 and the slit-shaped gaps 15 and the like, and the painted sheet S is
As shown by the imaginary line in FIG. 8, a stretching step of bringing the female mold 12 into close contact with the cavity 13 is performed. In addition, although the non-contact type of the infrared radiation system is used as the heating plate 40 used here, of course, a contact type that contacts and heats the painting sheet S can also be used. What is necessary is just to use a well-known thing in a technical field as a hot plate.

Next, the female mold 12 is moved toward the male mold 25 by advancing the ram 9 of the fluid pressure cylinder to perform a mold clamping step.
At the time of this mold clamping, as shown in FIG. 9, the material is supplied onto the parting surface 14 of the female mold 12 near the upstream end 12A of the female mold 12 by a cutter 35 provided on the male mold 25. One shot on the leading end side of the picture sheet S pressed and fixed by the clamper 20 is separated from the subsequent portion.

Thereafter, the runner 27 and the gate 2 on the male mold 25 side are placed in a cavity formed between the female mold and the male mold.
8, an injection molding step of injecting and filling the molten resin (Pa) to perform injection molding, a mold opening step of separating the female mold 12 and the male mold 25, and an injection resin molded product (S
The part to be attached and attached to a) is another part (excess part)
And a take-out step of taking out the laminated product on which the picture-coated sheet S is adhered and laminated from both the male and female molds.

In this case, after the mold opening step, the servo motor 70 of the transport chuck driving mechanism 60 is rotationally driven in the opposite direction (reverse rotation direction). Accordingly, the half portion of the belt 69 on the side to which the L-shaped connecting member 75 is connected rotates in the opposite direction (the direction from bottom to top in FIG. 2), and in conjunction with this, At an appropriate time after the clamping step, the transport chuck 5 is switched from the sheet gripping state (closed state) to the released state (open state).
0 runs on the female parting surface 14 and
Is moved from the vicinity of the downstream end portion 12B to the vicinity of the upstream end portion 12A to return to the original initial position, and the leading end portion Sa of the next shot of the painting sheet S is grasped and prepared for the next shot (see FIG. 2). ).

As described above, the simultaneous injection molding painting apparatus 10 of the present embodiment does not require the receiving / fixing chuck provided in the above-described conventional cooperative chuck type painting sheet supply means. Since the receiving and fixing chuck is also used, there is no need to perform the operation of delivering the leading end of the sheet with the picture from the transport chuck to the receiving and fixing chuck, and the control operation of the chuck becomes simple and easy. Furthermore, in the conventional apparatus, after the painting sheet supplying step and before the clamping step, the transport chuck had to be returned to the original initial position (near the upstream end of the female mold). Can stay near the female downstream end 12B.
Therefore, the sheet supply process can be performed properly in a short time, and one molding cycle can be shortened, as compared with the related art.

Also, a mechanism such as a fluid pressure cylinder or a ball screw feed mechanism, which requires a long occupied space on the upstream side of the female mold, is not used as the transport chuck driving means. The endless annular member (belt 6
Since it is possible to adopt the form of the winding transmission mechanism 61 provided with 9), a large space is not required on the upstream side of the female die 12, and the space occupied by the entire apparatus, particularly in the direction along the conveying direction of the painted sheet ( The occupied space in the direction (Z direction in FIG. 1) can be reduced.

Further, by using the wrapping transmission mechanism 61 as described above as the transport chuck driving means, a relatively long transport chuck driving means comprising a fluid pressure cylinder or the like is used. The transport chuck 50 is less likely to oscillate, and the painting sheet can be stably and quickly supplied onto the female parting surface.

[0057]

As will be understood from the above description, according to the simultaneous injection molding and painting apparatus of the present invention, the space occupied in the direction along the painting sheet conveyance direction can be reduced as compared with the conventional one, and the painting sheet can be reduced. An excellent effect of being able to supply quickly and appropriately onto the female parting surface is obtained.

[Brief description of the drawings]

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

FIG. 2 is a partially cutaway side view for explaining each part of the apparatus shown in FIG. 1;

FIG. 3 is a perspective view showing the periphery of a female mold of the device shown in FIG. 1;

FIG. 4 is a plan view showing the periphery of a female mold of the device shown in FIG. 1;

FIG. 5 is a partially cutaway bottom view taken along line V of FIG. 4;

FIG. 6 is a partially enlarged cross-sectional view used for describing the configuration and operation of the transport chuck of the apparatus shown in FIG.

FIG. 7 is a diagram which is used for describing a painting sheet supply step of the apparatus shown in FIG.

FIG. 8 is a diagram for explaining a clamping process, a stretching process, and the like of the apparatus shown in FIG. 1;

FIG. 9 is a diagram for explaining a mold clamping process, an injection molding process, and the like of the apparatus shown in FIG. 1;

[Explanation of symbols]

 S Painting sheet 10 Injection molding simultaneous painting apparatus 12 Female mold 13 Cavity 14 Parting surface 15 Slit-shaped gap 16 Sheet fixing suction groove 17 Vacuum suction hole 20 Rectangular frame-shaped clamper 25 Male mold 50 Transport chuck 60 Transport chuck drive mechanism 61 Winding transmission mechanism 65, 68 Pulley 69 Belt 70 Servo motor 72 Guide rail section 75 Connecting member 77 Roller

Claims (8)

[Claims] 1. A female type and a male type, and a painted sheet supplying means for conveying one shot of the front side of a long strip-shaped painted sheet wound in a roll shape onto the female parting surface. In the simultaneous injection-molding and painting apparatus provided, the painting sheet supply means grips a leading end of the painting sheet near an upstream end in a conveying direction of the painting sheet in the female mold, and holds the female mold. A transport chuck for pulling and transporting to the vicinity of the downstream end of the transfer chuck; and a transport chuck provided at one or both sides between the vicinity of the upstream end and the vicinity of the downstream end in the female mold. And a transport chuck driving means for reciprocating the sheet between the vicinity of the upstream end and the vicinity of the downstream end. 2. The transfer chuck driving means includes a pair of pulleys rotatably disposed near the upstream end and near the downstream end on one side or both sides of the female mold. A rotating member such as a sprocket wheel, an endless annular member such as a belt or a chain wound between the pair of rotating members along the side of the female mold, and the transfer chuck and the endless annular member are connected. The simultaneous injection molding and painting apparatus according to claim 1, further comprising: a connecting member configured to be driven; and a drive source such as a motor that drives the rotating member to rotate. 3. A guide rail portion is provided on one or both side portions of the female mold, and a rolling element or a slider which comes into contact with the guide rail portion is provided on the connecting member. The simultaneous injection molding painting apparatus according to claim 2, wherein 4. The male mold is provided with a clamp means for pressing and fixing the painting sheet supplied on the female parting surface to the parting surface. 4. The simultaneous injection molding painting apparatus according to any one of claims 1 to 3. 5. The clamping means comprises a rectangular frame-shaped or double-girder-shaped clamper and a projecting drive means such as a hydraulic cylinder for projecting the clamper toward the female parting surface. Claim 4
Injection molding simultaneous painting apparatus according to 1. 6. A cutout recess capable of accommodating the transport chuck that has pulled and transported the painted sheet to near the downstream end of the female mold in a closed state with the female mold in the male mold. The simultaneous injection-molding and painting apparatus according to any one of claims 1 to 5, wherein: 7. When the male mold is clamped to the female mold, one shot on the leading end side of the picture sheet supplied on the parting surface of the female mold near the upstream end of the female mold. The simultaneous injection molding and painting apparatus according to any one of claims 1 to 6, further comprising a sheet cutting means such as a cutter or a heating wire for separating the sheet from a subsequent portion. 8. A groove-shaped accommodation portion capable of accommodating the sheet cutting means in a state in which the female mold is clamped with the male mold is provided near the upstream end of the female mold. Item 7. The simultaneous injection molding and painting apparatus according to Item 7.