JP4183243B2 - Molding method for laminated resin molded products - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for molding a laminated resin molded product having a surface made of a resin film.
[0002]
[Prior art]
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-249999
Conventionally, there is a molding method of the laminated resin molded product as shown in Patent Document 1 described above. According to this method, the surface of the resin molded product body placed on the upper surface of the lower mold is placed on the surface. The resin film is joined, and then the upper surface of the resin film is pressed with an upper mold from above the resin film to adhere the resin film to the surface of the molded product body and mold them, thereby Molded products (decorative materials) are to be molded.
[0005]
[Problems to be solved by the invention]
By the way, when the resin film is pressed with a molding die as described above and the resin film and the molded product body are molded, a large external force is applied from the molding die to a part of the resin film. There is a risk that a part of the molded product may be cut, and in this case, the appearance of the molded product is deteriorated.
On the other hand, conventionally, there is injection molding as a molding method of the molded product. According to this, after the resin film is installed at a predetermined position inside the mold, a fluid resin material is placed inside the mold. Pressurized and solidified to form a molded product.
[0007]
However, in the above-described molding method by injection molding, there is a possibility that the resin film may be cut or the surface of the resin film may be uneven due to the pressure of the fluid resin material injected under pressure into the mold. In this case as well, there is a problem that the appearance of the molded product is deteriorated.
[0008]
The present invention has been made by paying attention to the above circumstances, and when molding a laminated resin molded product whose surface is composed of a resin film, a molded product having a good appearance can be obtained more reliably. The task is to do. It is another object of the present invention to facilitate the molding operation of the molded product.
[0009]
[Means for Solving the Problems]
The molding method of the laminated resin molded product of the present invention for solving the above problems is as follows. In addition, the code | symbol attached | subjected to each term in this section does not limit the technical scope of this invention to the content of the term of the "embodiment of invention" mentioned later.
[0010]
The invention of claim 1, as illustrated in all the drawings, heats the thermoplastic resin film 2 and joins the resin film 2 to the surface 3 a of the molded product body 3, so that the resin film 2 and the molded product body are joined. In the molding method of the laminated resin molded product, the air 10 trapped between the molded product body 3 is sucked and discharged, and each part of the resin film 2 is bonded to the surface 3a of the molded product body 3 by the negative pressure . In the side view of the molded product body 3, the molded product body 3 is formed so that its width dimension increases as it goes downward, and a recess that opens downward is formed on the back surface 3 b of the molded product body 3. , the recess is fitted to the jig 8, to the resin film 2 in a flat shape at a position apart upward from the molding body 3, toward the resin film 2 to the surface 3a of the molded article body 3 Down By translating, in which the resin film 2 so as to be bonded to the surface 3a of the molded article body 3.
[0011]
In addition to the invention of claim 1, the invention of claim 2 is obtained by printing 7 on a part of the resin film 2 in addition to the invention of claim 1.
[0012]
The invention of claim 3 is such that, in addition to the invention of claim 1, the resin film 2 is joined to the back surface 3 b of the outer edge of the molded product body 3 as illustrated in FIGS. 4-6. is there.
[0013]
A fourth aspect of the present invention, as illustrated in Figure 4-6, in addition to the invention of claim 1, is brought into contact with the jig 8 in the middle portion of the back surface 3b of the molding body 3, the resin film 2 is straddled between the surface 3a of the molded product body 3 and the outer surface 8a of the jig 8 and bonded to each other, and is confined between the resin film 2, the molded product body 3 and the jig 8. The air 10 is sucked and discharged, and each part of the resin film 2 is joined to the front surface 3a of the molded product body 3 and the back surface 3b of the outer edge of the molded product body 3 by the negative pressure. It is.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
(First embodiment)
[0016]
FIG. 1-3 shows a first embodiment.
[0017]
In FIG. 3, reference numeral 1 denotes a laminated resin molded product, and this molded product 1 is used for, for example, an exterior interior part of a vehicle such as an automobile, a motorcycle, a ship, and a train, and an exterior part of a home appliance.
[0018]
The molded product 1 includes a resin film 2 constituting the front surface side thereof, and a resin molded product main body 3 constituting the back surface side of the molded product 1, and covers almost the entire surface 3 a of the molded product body 3. The resin film 2 is bonded and bonded by an adhesive 4.
[0019]
For the resin film 2, polycarbonate (PC), acrylic, PET, urethane or the like is used. Further, unsaturated polyester, epoxy, vinyl ester, urethane, or the like is used for the molded product body 3. The adhesive 4 is thermoplastic, and urethane, epoxy, acrylic, etc. are used for the adhesive 4. Further, reinforcing fibers for reinforcing the molded product body 3 are embedded in the molded product body 3, and the reinforcing fibers are short fibers of less than 1 mm or long fibers of 1 mm or more. Glass, carbon, polyimide, Kevlar, alumina, etc. are used.
[0020]
A method for molding the molded product 1 will be described with reference to FIGS.
[0021]
In FIG. 1, first, the molded product body 3 is molded by injection molding using a molding die 6. At the time of molding, reinforcing fibers are embedded in the molded product body 3. On the other hand, the resin film 2 is formed. The resin film 2 can be formed into a flat shape in a free state, and can be extended in each direction along the surface if the resin film 2 is heated and softened. Further, printing 7 is applied to a part of the back surface of the resin film 2.
[0022]
In FIG. 2, the molded product main body 3 molded as described above is taken out from the molding die 6, and the molded product main body 3 is supported by a fixed base so that the surface 3a of the molded product main body 3 is the upper surface. Place on the jig 8. In this case, the jig 8 is brought into contact over almost the entire back surface 3b of the molded product body 3. At the position away from the molded product body 3 upward, the left and right edges of the resin film 2 are gripped to make the resin film 2 substantially flat in the horizontal direction, and the resin film 2 A moving device 9 such as a robot is provided that allows the resin film 2 to be translated in the vertical direction, which is the thickness direction of the resin film 2, while the plate is kept flat.
[0023]
By moving the resin film 2 downwardly toward the surface 3a (upper surface) of the molded product body 3 by the moving device 9, the resin film 2 is placed on at least a part of the surface 3a of the molded product body 3. It joins via the said adhesive material 4, and the said resin film 2 is adhere | attached on the surface 3a of the molded article main body 3 by this.
[0024]
When the resin film 2 is bonded to the surface 3a of the molded product body 3 by the moving device 9, the resin film 2 is heated and softened. The resin film 2 is pressed against the surface 3a of the molded product body 3. At this time, the resin film 2 is stretched by the tensile stress generated in the resin film 2, and the molded product body. 3 covers the entire surface 3a. At this time, the resin film 2 is straddled across the surface 3a of the molded product body 3 and the outer surface 8a of the jig 8, and the surface 3a of the molded product body 3 and the outer surface 8a of the jig 8 To each of them. Here, the air 10 trapped between the resin film 2, the molded product body 3 and the jig 8 is sucked and discharged by suction means 11 such as a pump.
[0025]
In FIG. 3, as described above, the air 10 is sucked and discharged by the suction means 11, and a negative pressure is generated between the resin film 2, the molded product body 3 and the jig 8. And by this negative pressure, each part of the resin film 2 is joined to each part over the whole surface 3a of the molded article main body 3, and it adhere | attaches with the said adhesive material 4. FIG. Next, if the unnecessary part 2a of the resin film 2 is removed by cutting with a rotary blade or thermal fusing, the molded product 1 is formed as shown by a two-dot chain line in FIG.
[0026]
According to the above configuration, since the resin film 2 heated and softened in the molding of the molded product 1 is bonded to the surface 3a of the molded product body 3, the molded product 1 is molded. It is possible to prevent a large external force from being applied to the part of the resin film 2 from the mold as in mold molding. Therefore, it is prevented that a part of the resin film 2 is cut off or irregularities are formed on the surface of the resin film 2 when the molded product 1 is molded, and the molded product 1 having a good appearance can be obtained more reliably.
[0027]
Further, as described above, printing 7 is applied to a part of the resin film 2 so that the resin film 2 is almost entirely flat at a position away from the molded product body 3, and the thickness of the resin film 2 is increased. The resin film 2 is joined to the surface 3a of the molded product body 3 by being translated in the direction toward the surface 3a of the molded product body 3.
[0028]
For this reason, the shape and movement of the resin film 2 when the resin film 2 is bonded to the surface 3a of the molded product body 3 are simple, and accordingly, the resin film 2 is applied to the surface 3a of the molded product body 3. When bonding, the printing 7 on the resin film 2 can be positioned more accurately with respect to a predetermined position on the surface 3a of the molded product body 3. Therefore, the molded article 1 having a good appearance can be obtained more reliably.
[0029]
Further, as described above, the molding operation of the molded product 1 can be facilitated because the shape and movement operation of the resin film 2 when being joined to the surface 3a of the molded product body 3 are simple.
[0030]
Although the above is based on the illustrated example, an insert part may be attached to the molded product body 3. The molded product body 3 may be either thermoplastic or thermosetting. Further, the adhesive 4 and the reinforcing fiber need not be provided. Moreover, the printing 7 may be one in which a printed double-sided adhesive seal is adhered to the resin film 2. Further, when the resin film 2 is adhered to the surface 3a of the molded product body 3, the surface of the resin film 2 may be pressurized with a positive pressure.
[0031]
The following drawings show the second and third embodiments. Each of these embodiments is common in many respects to the configuration and operational effects of the first embodiment. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. Moreover, you may combine various structures of each part in these each embodiment in light of the subject and effect of this invention.
[0032]
(Second Embodiment)
[0033]
4 and 5 show a second embodiment.
[0034]
In FIG. 4, the jig 8 is brought into contact with the intermediate portion of the back surface 3 b of the molded product body 3. At this time, the jig 8 is not in contact with at least a part of the back surface 3b of the outer edge of the molded product body 3. On the other hand, the resin film 2 is heated and the resin film 2 is bonded to the surface 3 a of the molded product body 3 and the outer surface 8 a of the jig 8. Here, the air 10 trapped between the resin film 2, the molded product main body 3 and the jig 8 is sucked and discharged by the suction means 11.
[0035]
In FIG. 5, as described above, the air 10 is sucked and discharged by the suction means 11, and a negative pressure is generated between the resin film 2, the molded product body 3 and the jig 8. And by this negative pressure, each part of the resin film 2 is joined to each part over almost the entire surface 3a of the molded product body 3, and also joined to the back surface 3b of the outer edge part of the molded product body 3, respectively. Adhere with. Next, if the unnecessary portion 2a of the resin film 2 is cut and removed, the molded product 1 is formed as shown by a two-dot chain line in FIG.
[0036]
According to the said structure, the resin film 2 is joined also to the back surface 3b of the outer edge part of the said molded article main body 3. FIG.
[0037]
For this reason, since the molded product body 3 is covered not only with the front surface 3a but also the back surface 3b of the outer edge portion with the resin film 2, the molded product body 3 in the molded product 1 can be easily seen in appearance. Therefore, the molded article 1 having a good appearance can be obtained more reliably.
[0038]
Further, since the resin film 2 is bonded to the front surface 3 a and the back surface 3 b of the molded product body 3 as described above, the outer edge side of the resin film 2 is fitted to the outer edge of the molded product body 3. Thus, the resin film 2 can be connected to the molded product body 3.
[0039]
Therefore, the adhesive 4 is not necessarily used for the connection of the resin film 2 to the molded product body 3. When the adhesive 4 is not used, the resin film 2 and the molded product body 3 can be easily separated from each other when the molded product 1 is to be recycled. Moreover, a thin plate material such as a favorite photograph or printed matter can be inserted into and removed from the gap between the resin film 2 and the molded product body 3, and the degree of freedom of use of the molded product 1 is improved.
[0040]
Further, as described above, the jig 8 is brought into contact with the intermediate portion of the back surface 3b of the molded product body 3 to heat the thermoplastic resin film 2, and the resin film 2 is used as the front surface 3a of the molded product body 3. And the outer surface 8a of the jig 8 are joined to each other, and the air 10 trapped between the resin film 2, the molded product body 3 and the jig 8 is sucked and discharged, Each part of the resin film 2 is joined to the front surface 3a of the molded product body 3 and the back surface 3b of the outer edge of the molded product body 3 by negative pressure.
[0041]
For this reason, the resin film 2 is not limited to the front surface 3a of the molded product body 3 but can be bonded to the back surface 3b of the outer edge of the molded product body 3. According to the molding method, The resin film 2 can be easily joined to the front and back surfaces 3a and 3b of the product body 3, that is, the molding work of the molded product 1 can be facilitated.
[0042]
(Third embodiment)
[0043]
FIG. 6 shows a third embodiment.
[0044]
According to this, the step surface 3 c is formed on the back surface 3 b at the outer edge of the molded product body 3.
[0045]
When molding the molded product 1, as described above, a negative pressure is generated between the resin film 2, the molded product main body 3 and the jig 8 by the suction means 11, and the negative pressure causes the resin film 2 to Each part is joined to each part of the surface 3a of the molded product body 3 and the back surface 3b of the outer edge of the molded product body 3, and then the unnecessary portion 2a is cut off from the resin film 2. Then, as shown by a one-dot chain line in FIG. 6, the outer edge 2 b of the resin film 2 on the side bonded to the molded product body 3 is bonded to the stepped surface 3 c and bonded with the adhesive 4. ing.
[0046]
As shown by a two-dot chain line in FIG. 6, the air 10 in the vicinity of the step surface 3c is sucked and discharged by the suction means 11 to generate a negative pressure, and the negative pressure causes the resin film on the step surface 3c. 2 may be joined.
[0047]
【The invention's effect】
The effects of the present invention are as follows.
[0048]
The invention of claim 1 heats the thermoplastic resin film, bonds the resin film to the surface of the molded product body, and sucks and discharges air trapped between the resin film and the molded product body. The portions of the resin film are bonded to the surface of the molded product body by the negative pressure.
[0049]
For this reason, since the resin film softened by heating as described above is bonded to the surface of the molded product body, a part of the resin film is molded with respect to a part of the resin film during molding. It is possible to prevent a large external force from being applied to the mold. Therefore, it is possible to prevent a part of the resin film from being broken or unevenness on the surface of the resin film at the time of molding the molded product, and to obtain a molded product having a good appearance.
[0050]
Further, in the side view of the molded product main body, the molded product main body is formed so as to increase in width as it goes downward, and a concave portion that opens downward is formed on the back surface of the molded product main body. recess and is fitted to a jig, to the resin film in a flat shape at a position apart upward from the molding body, by translating downward toward the resin film on the surface of the molding body, The resin film is bonded to the surface of the molded product body.
[0051]
For this reason, since the shape and movement operation of the resin film when being joined to the surface of the molded product body are simple, the molding operation of the molded product can be facilitated.
[0052]
According to a second aspect of the present invention, a part of the resin film is printed.
[0053]
Therefore, as described above, the shape or move operation is Ru simple der content of the resin film at the time of bonding the resin film to the surface of the molded article body, when bonding the resin film to the surface of the molding body The printing on the resin film can be positioned more accurately with respect to a predetermined position on the surface of the molded product body. Therefore, a good-looking molded product can be obtained more reliably .
[0054]
According to a third aspect of the present invention, the resin film is bonded to the back surface of the outer edge portion of the molded product body.
[0055]
For this reason, since the molded product body is covered not only on the surface but also on the back surface of the outer edge portion with the resin film, the molded product body in the molded product is prevented from being easily seen in appearance, A good-looking molded product can be obtained more reliably.
[0056]
In addition, since the resin film is bonded to the front and back surfaces of the molded product body as described above, the outer edge side of the resin film is fitted to the outer edge of the molded product body, and the resin film is It can be connected to the molded product body.
[0057]
Therefore, it is not always necessary to use an adhesive for connecting the resin film to the molded product body. When the adhesive is not used, the resin film and the molded product main body can be easily separated from each other when the molded product is to be recycled. Moreover, a thin plate material such as a favorite photograph or printed matter can be inserted into and removed from the gap between the resin film and the molded product main body, and the degree of freedom of use of the molded product is improved.
[0058]
The invention of claim 4 is brought into contact with the jig in the middle portion of the back surface of the molded article body, joined to each of the resin film was span the outer surface of the surface and the jig of the molding body The air trapped between the resin film, the molded product main body and the jig is sucked and discharged, and the negative pressure causes each part of the resin film to form the surface of the molded product main body and the molded product. It is made to join with the back surface of the outer edge part of a main body.
[0059]
For this reason, the resin film is not limited to the surface of the molded product body, but can also be bonded to the back surface of the outer edge of the molded product body, but according to the molding method, the surface of the molded product body, The resin film can be easily joined to the back surface, that is, the molding work of the molded product can be facilitated.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a molding method of a molded product in the first embodiment.
FIG. 2 is another side cross-sectional view showing the molding method of the molded product in the first embodiment.
FIG. 3 is still another side cross-sectional view showing the method of forming a molded product in the first embodiment.
FIG. 4 is a diagram corresponding to FIG. 2 in the second embodiment.
FIG. 5 is a diagram corresponding to FIG. 3 in the second embodiment.
FIG. 6 is a diagram corresponding to a part of FIG. 3 in the third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Molded product 2 Resin film 2a Unnecessary part 2b Outer edge part 3 Molded product main body 3a Front surface 3b Back surface 4 Adhesive material 7 Printing 8 Jig 8a Outer surface 9 Moving device 10 Air 11 Suction means

Claims (4)

While heating the thermoplastic resin film, the resin film is bonded to the surface of the molded product body, and air trapped between the resin film and the molded product body is sucked and discharged, and the resin is discharged by the negative pressure. In the method for molding a laminated resin molded product in which each part of the film is joined to the surface of the molded product body, the molded product body increases in width as the width dimension is lowered in the side view of the molded product body. and forming as to form a recess that opens downward on the back surface of the molded article body, the recess is fitted to a jig, the resin film in a flat shape at a position apart upward from the molding body is allowed, by translating downward toward the resin film on the surface of the molding body, the product of the resin film so as to be bonded to the surface of the molding body Molding method of the resin molded article. The method for forming a laminated resin molded product according to claim 1, wherein a part of the resin film is printed.   The method for molding a laminated resin molded product according to claim 1, wherein the resin film is bonded to the back surface of the outer edge of the molded product body. The intermediate portion of the back surface of the molded article body is brought into contact with the jig, the resin film is bonded to each by span and outer surface and the jig of the molding body, and the resin film, The air trapped between the molded product body and the jig is sucked and discharged, and the negative pressure causes each part of the resin film to be on the surface of the molded product body and the back surface of the outer edge of the molded product body. The method for molding a laminated resin molded article according to claim 1, wherein the laminated resin molded article is bonded to the mold.

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