JP2000006199A - Mold apparatus for injection molding and in-mold decorating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a molding having a smooth surface by suppressing occurrence of a wrinkle on a decorating sheet because of a flow of a molten resin to be injected in a cavity after a mold is clamped in the case of molding by a method for injection molding and in-mold decorating. SOLUTION: The mold apparatus 10 used for an injection molding and in- mold decorating apparatus comprises a female mold 20 and a male mold 12 to be engaged with the mold 20. In this case, a first elastic ring 27 for performing a role of hermetically sealingly shutting off a cavity 22 from an exterior is mounted at a parting surface 40 of the female mold. Further, a second elastic ring 27a is mounted on the parting surface 40 at an inside from a position of the ring 27 so as to circulate the cavity 22. Drawing of a decorating sheet caused by a flow of a molten resin is suppressed according to the presence of the ring 27a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative molded product (product) obtained by integrally adhering a painted sheet on which patterns and characters are applied in a mold simultaneously with injection molding to the surface of an injection resin molded product. The present invention relates to a mold apparatus used in an injection molding simultaneous painting apparatus which is obtained.

[0002]

2. Description of the Related Art As a simultaneous painting method for injection molding, in which a painted sheet is integrally adhered to the surface of a molded article at the same time as injection molding, a painted sheet consisting of a band-shaped sheet or a single sheet is placed between a female mold and a male mold. After being supplied and heated and softened by a hot plate or the like, the female mold and the male mold are closed by vacuum molding and / or pressure forming along the cavity surface of the female mold, and then the female mold is closed. In general, injection molding is performed by injecting and filling a molten resin into the mold from the male mold side (Japanese Patent Laid-Open No. 57-129731, Japanese Patent Publication No. 50-191).
No. 32).

[0003] As a painting sheet used for such simultaneous injection molding painting, either a laminated sheet (laminated sheet) or a transfer sheet is used according to the product type. In the case of a laminated sheet, Painting is performed as it is by injection molding, and the entire sheet is adhered and integrated with the outer surface of the injection molded product to form a decorative layer. On the other hand, when the painting sheet is a transfer sheet, the support sheet of the decorative sheet integrated with the outer surface of the molded article is peeled off, and a transfer layer such as a decorative layer is left on the molded article side to form a decorative layer. And the painting is completed.

In performing the simultaneous injection molding painting as described above, an injection molding simultaneous painting apparatus having a mold apparatus having both male and female molds is used. A typical example of the conventional mold apparatus is shown below. 5 and 6. The illustrated mold apparatus 50
Has a male mold 12 and a female mold 20, and the male mold 12 is provided with a runner 14 at the center of the core thereof for injecting and filling the molten resin from the injection molding machine into the cavity of the female mold 20. I have. On the other hand, the female mold 20 is provided with a cavity surface 22 corresponding to the molded article, and the painted sheet S is formed on the parting surface 4 formed on the outer peripheral side of the cavity 22.
A frame-shaped clamper 24 for fixing and holding at 0 is supported at its four corners by a sliding rod (not shown) so as to be movable forward and backward. An O-ring 27 is fitted into an annular groove provided on the lower female parting surface 40 of the clamper 24 for airtightness.

[0005] On the cavity surface 22, a picture sheet S
A vacuum suction hole 16 for extending (preforming) so as to closely adhere along the cavity surface 22 is opened, and the vacuum suction hole 16 is connected to a vacuum source (not shown) through an intake pipe 19. )It is connected to the. In addition, the compressed air supply hole connected to the compressed air supply source is provided in the male mold 12 as needed for the preforming.

In the mold apparatus 50 having such a configuration, as described above, the next shot portion of the painting sheet S is supplied between the parting surface 40 of the female die 20 and the clamper 24, and the painting sheet S Is fixed to the parting surface 40 of the female mold 20 by the clamper 24 (FIG. 5), and is softened by heating with a hot platen (not shown) or the like. The mold 20 is stretched so as to be in close contact with the cavity surface 22 of the mold 20 (preliminary molding).
The parting surface 40 of the female mold 20 and the male mold 1
The painted sheet S is brought into contact with the second parting surface 30 so as to be sandwiched between them, the mold is clamped (FIG. 6), and the molten resin is injected and filled into the cavity 22 of the female mold 20 through the runner 14 of the male mold 12. In addition, cooling is performed for a predetermined time, injection molding is performed to solidify, and then the mold is opened to separate the female mold 20 and the male mold 12, and the painted molded product to which the painted sheet S is adhered is taken out from the female mold 20. Is done.

In the simultaneous injection molding painting apparatus having the mold apparatus 50, the Sa portion on the parting surface is cooled by the parting surface because the parting surface 40 of the female mold 20 is formed flat. Due to friction and friction, the amount of stretching in the preliminary molding is smaller than that of the Sb portion on the cavity surface 22, and the amount of stretching during the drawing sheet stretching is concentrated on the Sb portion accordingly. Therefore, in particular, when the cavity surface 22 has a deep drawing shape, there is a problem that molding defects such as tears and wrinkles are likely to occur in the painted sheet S.

In order to solve the problem, an improved mold apparatus shown in FIGS. 7 and 8 has been proposed (see Japanese Patent Application Laid-Open No. 9-150434). In this mold apparatus 50, a parting surface 40 including an outer parting surface 41 and an inner parting surface 42 having a depth La is formed on the outer periphery of the cavity 22 of the female mold 20,
The outer parting surface 41 and the inner parting surface 42
Is the outer parting surface 31 formed on the male mold 12
The cavity 22 is sealed by contacting the inner peripheral parting surface 32 with the painting sheet S interposed therebetween.

The outer peripheral parting surface 41 is a flat surface for holding the picture sheet S between the clamper 24 and the fixed surface, and an annular groove is provided at a position facing the clamper 24. An O-ring 27 is fitted to maintain airtightness. Further, the inner peripheral parting surface 42 is formed on the inner peripheral side of the outer peripheral parting surface 41, and linearly connects the inner peripheral end J of the outer peripheral parting surface 41 and the start end K of the cavity surface 22. It is formed of a cylindrical curved surface that is recessed on the outer peripheral side from a surface (in FIG. 7, a cross section of the surface is indicated by a two-dot chain line).

[0010] In the simultaneous injection molding painting apparatus having the mold apparatus 50 of this configuration, at the time of the pre-molding, the painting sheet S, as shown by a virtual line in FIG.
The stretched deformation is performed in the order of −−, but the portion other than the portion Sa (Sb, Sc) on the outer parting surface 41 is substantially uniform until the painted sheet S comes into close contact with the inner parting surface 42. After that, only the Sb portion (product area portion) on the cavity surface 22 is stretched. In the mold device 50 having this configuration,
At the time of preforming, the amount of stretching of the painted sheet is also shared by the region Sc, so that large distortion is hardly generated in the product area, and molding failure such as tearing and wrinkles is less likely to occur in the painted sheet S.

[0011]

In the simultaneous painting apparatus for injection molding having the above-described mold apparatus, after the pre-forming of the painting sheet S, the mold is clamped to form the cavity 2 of the female mold 20.
The molten resin is injected and filled into the mold 2 through the runner 14 of the male mold 12. In the process of performing many simultaneous injection-molding paintings using the simultaneous injection-molding painting apparatus equipped with the above-described mold apparatus, the present inventors have examined the case of a mold apparatus without the inner parting surface 42, In the case of the mold device having the bearing surface 42, it has been found that in any case, the surface of the molded product may have unevenness due to wrinkles of the painted sheet S. In order to find out the cause, further experiments were carried out to find that the molten resin injected into the cavity 22 of the female mold 20 through the runner 14 of the male mold 12 was pre-formed and adhered to the inner surface of the cavity 22. When flowing along the sheet S, the painted sheet S tends to be dragged in the flow direction of the molten resin, and a location (so-called weld) where the molten resin fits from multiple directions is determined from the positional relationship between the shape of the cavity and the runner. Part), it was found that wrinkles occurred due to the drawn sheet parts being dragged together.

FIG. 10 schematically illustrates the flow of the molten resin and the behavior of the painted sheet S in the mold apparatus having the inner parting surface 42 shown in FIG. 7 as an example.
The molten resin injected from the runner 14 flows in the direction of the arrow,
As a result, a wrinkle C in which the painting sheet rises upward at the center of the bottom surface of the cavity is generated. The present invention has been made in view of the above circumstances, and minimizes the generation of wrinkles in a painted sheet due to the flow of molten resin injected into a cavity after mold clamping, and obtains a molded product with a smooth surface. It is an object of the present invention to obtain an injection molding simultaneous painting mold apparatus capable of performing the same.

[0013]

In the case of the above-described mold apparatus, in the mold clamping state, the sheet S with the picture is formed by the O-ring 27 and the clamper 24 inserted into the annular groove provided in the female parting surface 40. Between the O-ring 27 and the O-ring 27.
It is conceivable that this occurs in the painted sheet area (Sa, Sc, Sb) on the inner peripheral side of the sandwiching position between the sheet and the clamper 24. In the mold apparatus, the area Sa of the painted sheet S is
Since Sc and Sc are located on the outer peripheral side of the product area area Sb and have a large area, it is presumed that the wrinkles C generated in the painting sheet highly depend on the portions of the areas Sa and Sc. You.

The injection molding simultaneous painting apparatus according to the present invention for achieving the above object is based on the above findings, and is basically composed of a female mold and a male mold fitted to the female mold. And a first elastic ring serving to hermetically shut off the cavity and the outside is mounted on the female parting surface, and further inside the position of the first elastic ring. In the parting surface in,
A second elastic ring is mounted so as to go around the cavity.

According to this mold apparatus, since the second elastic ring is mounted so as to go around the cavity, the painted sheet is located inside the first elastic ring in the mold-clamped state. 2 between the elastic ring and the female parting surface. Therefore, the stretching caused by the drag of the painted sheet by the molten resin is limited to only the painted sheet region located on the inner peripheral side of the holding position between the second elastic ring and the female parting surface, The generation of wrinkles on the painted sheet is substantially suppressed. As a result, it is possible to always obtain a molded product having a smooth surface.

In a preferred embodiment of the mold apparatus according to the present invention, an annular groove is formed inside the second elastic ring so as to surround the cavity, and a vacuum suction hole is formed in the annular groove at an arbitrary pitch. It is open at. With this configuration, in addition to the above-described effects, uniform stretching and adhesion of the painted sheet in the preforming step can be further improved.

In this case, the annular groove has a width of 2 to 2.
Preferably about 4 mm and a depth of about 1 to 2 mm,
It is preferable to form a vacuum suction hole having a diameter of, for example, about 1 to 2 mm at an arbitrary pitch, for example, an interval of 40 to 50 mm in the bottom surface of the annular groove. It should be noted that as the number (density) of the vacuum suction holes is increased, the stretching amount of each part of the picture sheet is more likely to be uniform.

[0018] In a preferred embodiment of the mold apparatus according to the present invention, the female parting surface has an outer peripheral parting surface for fixing and holding the painting sheet with the clamper, and an inner peripheral parting surface. The inner parting surface is formed, and includes an inner parting surface that is concave toward the outer periphery side than a surface that linearly connects the inner end of the outer parting surface and the start end of the cavity surface. The first elastic ring is located on the outer parting surface, and the second elastic ring is located on the inner parting surface.

According to this aspect, in addition to the above-described effects, even when the cavity surface has a deep drawing shape,
It is possible to reduce local distortion of the painted sheet in the product area at the time of pre-molding, and it is possible to make it difficult for molding defects such as tears and wrinkles to occur in the painted sheet.

In the present invention, the material of the first elastic ring may be rubber such as silicon rubber, bind rubber, fluorine rubber, natural rubber, or metal.
Also, the material of the second elastic ring may be selected from the same materials as the material of the first elastic ring. Preferably, silicone rubber is optimal for reasons such as the pressing force of the painted sheet due to elasticity, surface flexibility, heat resistance, and strength. Further, the first and second elastic rings have O-shaped cross sections.
A ring is preferably used, but need not be circular in cross section. The diameter of the second elastic ring is 3 to 5 m
m. In the injection molding simultaneous painting mold apparatus of the present invention, the male and female molds are made of metal such as iron or ceramics, and are divided according to the shape of the molded product (structure having a nested structure or an intermediate mold). And so on. Further, a through hole for supplying compressed air may be formed in the male mold.

Further, before performing preforming for stretching the painted sheet along the cavity surface of the female mold so as to be closely adhered thereto, a heating means such as a hot platen may be provided to heat and soften the painted sheet. . As the hot plate, a known plate disclosed in Japanese Utility Model Publication No. 1-110186, Japanese Patent Laid-Open No. 5-301250, or the like can be used. The heating method may be any of a method of contacting the painting sheet and heating by heat conduction and a method of heating the painting sheet by radiant heat in a non-contact manner.

The painting sheet may be supplied in a required amount (for one shot) from a long continuous belt-shaped sheet wound in a roll shape, or a sheet sheet cut in advance to a predetermined size. May be supplied. Further, in order to supply a painted sheet composed of a strip-shaped sheet (the next shot portion) or a single sheet, between a female mold and a male mold arranged opposite to each other, a roll / roll using an unwinding machine and a winding machine is used. A system may be used, or a system may be used in which the painting sheet is automatically conveyed while being held by a suction disk, a chuck or the like.

Further, an appropriate clamping means may be provided to fix and hold the picture sheet on the female parting surface.
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.

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 keeping the base sheet in close contact with 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.
The decorative layer may be a printed pattern, a colored or transparent coating, a metal thin film, or a layer having functionality such as a hard coating, an anti-fog coating, or a conductive layer.

The transfer sheet is for transferring a transfer layer, such as a picture layer, once formed on a releasable support sheet, to another transfer target. 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. Injection molding resins include ABS (acrylonitrile-butadiene-styrene copolymer) resin, thermoplastic resin such as polystyrene, vinyl chloride, acrylic resin, polycarbonate resin, etc. Alternatively, two-part curing type, catalyst curing type resin, for example, an uncured liquid such as urethane resin and epoxy resin, etc., which can be used conventionally known materials for simultaneous painting with injection molding, required physical properties and cost of the product can be used. It is selected according to the situation.

[0028]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing one embodiment of a mold device for simultaneous injection molding and painting according to the present invention. In the figure, parts corresponding to the respective parts in the mold apparatus 50 shown in FIGS. 5 and 6 described above are denoted by the same reference numerals, and redundant description thereof will be omitted. In the following, differences will be mainly described. I do. The illustrated mold apparatus 10 includes a female mold 20 and a male mold 12 fitted to the female mold 20 in the same manner as described above. In the female mold 20, a sheet S with a picture is formed on the outer peripheral side of the cavity 22. Parting surface 4
0, a frame-shaped clamper 24 for fixing and holding the female parting surface 4 on the lower side of the clamper 24 is provided.
An O-ring 27 as a first elastic ring is fitted in the annular groove provided in the groove 0 to maintain airtightness.

Further, at a position inside the O-ring 27 on the parting surface 40 and close to the starting end position of the cavity, a second portion made of, for example, silicon rubber is formed so as to go around the cavity 22. Elastic ring 27a is mounted. Further, an annular groove 16a is formed on the parting surface 40 between the second elastic ring 27a and the starting end position of the cavity so as to go around the cavity.
Are provided with vacuum suction holes 16 at an arbitrary pitch.

In the simultaneous injection molding and painting apparatus having the mold apparatus 10 having such a configuration, as described above, the next shot portion of the painting sheet S is used for the parting surface 4 of the female mold 20.
0 and the clamper 24, the sheet S
The parting surface 40 of the female mold 12 by the clamper 24
And softened by heating with a hot plate, etc.
The picture-coated sheet S is vacuum-suctioned through the vacuum suction holes 16 and, if necessary, is supplied from the male mold 12 side or the hot platen side with compressed air to be stretched so as to be closely adhered along the cavity surface 22 of the female mold 20. Then, the female mold 20 is moved to the male mold 12 side, and then the painting sheet S is sandwiched between the parting surface 40 of the female mold 20 and the parting surface 30 of the male mold 12. Then, mold clamping is performed.

Accordingly, the painted sheet S can be placed between the second elastic ring 27a and the parting surface 30 of the male mold 12 in addition to the space between the O-ring 27, which is the first elastic ring, and the clamper 24. It will be in a state of being clamped and fixed. In this state, the molten resin is injected and filled into the cavity 22 through the runner 14 of the male mold 12. In this embodiment, the stretching of the painted sheet S caused by the dragging of the molten resin is positioned on the inner peripheral side with respect to the position at which the second elastic ring 27a and the parting surface 30 of the male mold 12 are nipped and fixed. Thus, it is possible to limit only to the painted sheet area, and the occurrence of wrinkles generated in the painted sheet S is substantially suppressed.

Further, an annular groove is formed inside the second elastic ring 27a so as to go around the cavity 22, and the vacuum suction hole 16 is opened in the annular groove. The uniform stretching and adhesion of the painted sheet S in the above are also improved. After cooling for a predetermined time, the mold is opened to separate the female mold 20 and the male mold 12 as usual, and the picture-formed molded product to which the picture sheet S is adhered is taken out.

FIG. 2 is a schematic view showing another embodiment of the mold apparatus for simultaneous injection molding and painting according to the present invention. The present invention is applied to the mold apparatus 50 shown in FIGS. 7 to 9 described above. This is an example of application. Here, parts corresponding to the mold apparatus 50 shown in FIGS. 7 to 9 are denoted by the same reference numerals, and redundant description thereof will be omitted. In this embodiment, the female mold 20
Has a two-stage structure of an outer parting surface 41 and an inner parting surface 42, and the outer parting surface 41 is fixed with the picture sheet S sandwiched between the clamper 24 and the parting surface 41. An annular groove is provided at a position facing the clamper 24, and an O-ring 27 as a first elastic ring is fitted into the annular groove to maintain airtightness.

Further, the second elastic ring 27 is formed so as to go around the cavity 22 at a position close to the starting end position of the cavity 22 on the inner peripheral parting surface 42.
a, and the second elastic ring 27
An annular groove 16a is formed on the inner peripheral parting surface 42 between a and the starting end position of the cavity 22 so as to go around the cavity, and the vacuum suction holes 16 are formed at an arbitrary pitch in the annular groove 16a. It is open.

In the mold apparatus 10a, as described above, the stretching of the painted sheet S can be dispersed over a wide area during the preforming, and molding defects such as tears and wrinkles are less likely to occur in the painted sheet S. In addition, the female mold 20 is further moved to the male mold 12 side, and the picture sheet S is moved to the parting surface 40 (the outer parting surface 41 and the inner peripheral parting surface 42) of the female mold 20 and the male mold 12. When the mold clamping is performed while being sandwiched between the parting surfaces 30 (the outer parting surface 31 and the inner parting surface 32) formed on the sheet, the painted sheet S becomes the first elastic ring. O
In addition to the position between the ring 27 and the clamper 24, the state is also sandwiched and fixed between the second elastic ring 27 a located on the inner peripheral parting surface 42 and the inner peripheral parting surface 32 of the male mold 12.

In this state, the male mold 12 is
When the molten resin is injected and filled through the runner 14, similarly to the case of the embodiment shown in FIG. 1, the stretching of the painted sheet S caused by the drag of the molten resin is performed by the second elastic ring 27 a. It is possible to limit only to the painted sheet area located on the inner peripheral side of the holding position between the mold 12 and the inner peripheral parting surface 32, and the generation of wrinkles generated in the painted sheet S is substantially suppressed.

FIGS. 3 and 4 are schematic views showing another embodiment of the injection-molding simultaneous-molding die apparatus according to the present invention. In this example, the outer peripheral parting surface 41 shown in FIG.
FIG. 2 shows that the cavity 22A of the female mold 20 having the inner parting surface 42 and the inner peripheral parting surface 42 has a cavity shape in which a stepped portion 20A corresponding to the shape of a molded product to be obtained is formed near the center. The configuration differs from that of the mold device.

In this example, the parting surface 40a outside the cavity 22A (outer parting surface 41) is used.
2, the first and second elastic rings 27 and 27a are attached to the inner peripheral parting surface 42), and the central stepped portion 2 outside the molded product is provided.
The annular groove 1 is formed so as to go around the cavity 22A along the edge E which is a boundary with the rising portion of the cavity 22A on the parting surface 40b of 0A.
6b are formed, and the vacuum suction holes 16 are opened in the annular groove 16b at an arbitrary pitch.
The inner side of the annular groove 16b (the side opposite to the cavity)
The third elastic ring 27b is inserted therein.

On the other hand, the male mold 12 is located at the center of the female mold 1.
A stepped protruding portion (core) 12A protrudes at a position opposed to the center parting surface 40b of the second and the bifurcated branch for injecting and filling the molten resin from the nozzle of the injection molding machine into the cavity 22A. A runner 14 is formed.

In the mold apparatus 10b of the present embodiment having the above-described configuration, the parting surface 4 of the female mold 20 is
The painting sheet S is supplied onto the parts 0a and 40b, the painting sheet S is pressed and held on the parting surface by a frame-shaped clamper 24, and the pressed painting sheet S is heated by a hot platen (not shown). The annular groove 16 in which the softened and heat-softened picture sheet S is formed in the female mold 20
a, 16b and the vacuum suction holes 16 to suck the painting sheet S into the cavity 2 of the female die 20.
The film is stretched so as to adhere along the 2A surface.

Thereafter, when the female mold 20 is moved toward the male mold 12 and the mold is clamped, the painted sheet S is
The outer parting surface 40a (outer parting surface 41 and inner parting surface 42) and the outer parting surface 30a (outer parting surface 31 and inner parting surface 32) formed on the male mold 12 are formed. ) And the parting surface 40b of the stepped portion 20A at the center outside the molded product
And the central parting surface 30b of the stepped convex portion (core) 12A of the male mold 12.

At this time, the painting sheet S is provided on the outer parting surface 41 of the female mold 20 in addition to the space between the O-ring 27 as the first elastic ring and the clamper 24 and the inner peripheral part. The second elastic ring 27a located on the surface 42 and the inner parting surface 32 of the male mold 12 are also held and fixed between them. Further, in the parting surface 40b of the central step 20A, The third
Elastic ring 27b and central parting surface 3 of male mold 12
0b.

For this purpose, the male mold 1 is provided in the cavity 22A.
When the molten resin is injected and filled through the second runner 14,
The stretching of the painted sheet S due to the dragging of the molten resin can be prevented in the area of the parting surface 40a outside the female mold 20 and, in addition, the stepped portion 20 of the central portion can be prevented.
It is also possible to block in the parting surface 40b region of A. Therefore, such a central stepped portion 2
Even in the case of a cavity configuration having a parting surface 40b at 0A, it is possible to substantially prevent the generation of wrinkles C generated in the painted sheet S.

[0044]

According to the simultaneous painting apparatus for injection molding according to the present invention, in addition to the first elastic ring serving to hermetically shut off the cavity and the outside, the position of the female parting surface is adjusted. Since the second elastic ring is mounted on the parting surface on the inner side of the cavity so as to go around the cavity, the second elastic ring limits stretching caused by dragging of the painted sheet by the molten resin. And the generation of wrinkles on the painted sheet is suppressed. As a result, a molded product having a smooth surface can always be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of one embodiment of a mold device for simultaneous injection molding and painting according to the present invention.

FIG. 2 is a schematic configuration diagram of another embodiment of a mold apparatus for simultaneous injection molding and painting according to the present invention.

FIG. 3 is a perspective view showing still another embodiment of a mold device for simultaneous injection molding and painting according to the present invention.

FIG. 4 is a schematic configuration diagram of a mold device for simultaneous injection molding and painting shown in FIG. 3;

FIG. 5 is a schematic configuration diagram of an example of a mold apparatus used in a conventional simultaneous injection molding painting apparatus.

FIG. 6 is a diagram shared with the description of the use mode of the mold apparatus shown in FIG. 5;

FIG. 7 is a schematic configuration diagram of another example of a mold apparatus used in a conventional simultaneous injection molding painting apparatus.

FIG. 8 is a diagram for explaining the manner of use of the mold apparatus shown in FIG. 7;

FIG. 9 is a diagram which is used for describing a preforming process in the mold apparatus shown in FIG.

FIG. 10 is a diagram for explaining the behavior of the painted sheet due to the supplied molten resin.

[Explanation of symbols]

 S: Sheet with picture 12 ... Male mold 20 ... Female mold 22 ... Cavity 27 ... First elastic ring 27a ... Second elastic ring 16 ... Vacuum suction hole 16a ... Annular groove 24 ... Clamper 40 ... Female parting surface

Claims (3)

[Claims] A first elastic ring which has a female mold and a male mold fitted to the female mold, and has a function of hermetically shutting off the cavity from the outside on a parting surface of the female mold. And a second elastic ring is mounted on the parting surface inside the position of the first elastic ring so as to go around the cavity. Mounting mold equipment. 2. An annular groove is formed inside the second elastic ring so as to go around the cavity,
2. The mold device for simultaneous injection molding and painting according to claim 1, wherein vacuum suction holes are opened at an arbitrary pitch in said annular groove. 3. The female parting surface is formed on an outer peripheral parting surface for holding the painting sheet between the clamper and the outer parting surface, and formed inside the outer peripheral parting surface.
And an inner parting surface that is concave toward the outer side than a surface that linearly connects the inner end of the outer parting surface and the beginning of the cavity surface, and 3. The simultaneous injection-molding picture according to claim 1, wherein the first elastic ring is located on the outer parting surface, and the second elastic ring is located on the inner parting surface. Mounting mold equipment.