JP3246652B2 - Molding method of laminated molded body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a laminated molded article, which is preferably applied to a molded ceiling or the like disposed in a vehicle interior.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, a molded ceiling 5 disposed in the interior of an automobile is formed by a laminated molded body 1 formed into a predetermined curved shape. It is the indoor side of the polyphenylene oxide resin sheet-like resin core member 2 made of (PPO), cloth, urethane, are a configuration laminated decorative for skin material 3 such as a nonwoven fabric.

[0003] The laminated molded body 1 is molded by a molding apparatus 10 as shown in FIG. The molding device 10 includes:
A lower mold 11 having a mold surface 11a having a predetermined shape;
1 and an upper mold 12 having a mold surface 12 a having a shape corresponding to the shape of the mold surface 11 a of the lower mold 11. A heating device 14 is provided near the molding device 10.

[0004] As a method of forming the laminated molded body 1, there is a skin material simultaneous heating molding method in which a resin core material 2 and a skin material 3 are simultaneously heated, and both are laminated and molded by a molding die 13. In this molding method, first, the resin core material 2 and the skin material 3 are simultaneously heated by the heating device 14, and the heating temperature of the resin core material 2 is set to 130 to 140 ° C. on the surface 2a on the skin material side.
The surface 2b on the side opposite to the skin material side (back side)
Hold at 50 ° C. Next, the resin core material 2 and the skin material 3 are arranged in a molding die 13 (between the lower die 11 and the upper die 12) which has been previously heated to a die temperature of 60 ° C. The resin core material 2 and the skin material 3 are laminated and molded by lowering the mold 12 and clamping the mold, thereby obtaining the laminated molded body 1.

However, in this simultaneous heating and molding method of the skin material, the so-called reverse hair phenomenon occurs at the time of lamination and molding because the hair of the cloth easily falls down when the skin material 3 is heated. There is a possibility that the design aesthetics of the camera may be impaired.

[0006] In order to prevent the reverse hair phenomenon, there is a skin material non-heating molding method in which only the resin core material 2 is heated and molded. According to this molding method, first, the skin material 3 in which the adhesive 4 is applied to the surface on the resin core material side in advance is heated in the molding die 13 (the lower die 11) heated to 60 ° C. without heating. And the upper mold 12). Next, by the heating device 14, the resin core material 2 in which both the heating temperature of the surface 2a on the skin material side and the heating temperature of the surface 2b on the back surface side are heated to 130 to 150 ° C,
It is arranged in the molding die 13 (specifically, between the skin material 3 and the upper die 12 arranged in advance). Thereafter, the upper mold 12 is lowered and the mold is clamped, whereby the resin core material 2 and the skin material 3 are laminated and molded to obtain the laminated molded body 1.

[0007]

However, in the above-mentioned non-heated skin material forming method, since the skin material 3 is not heated, the reverse hair phenomenon of the cloth due to heat does not occur. The side edge of the body 1 may warp toward the skin material 3 side. The deformation due to the warpage may reach 15 to 30 mm at the side edge of the laminated molded body 1, and as a result, the desired curved shape of the laminated molded body 1 may not be obtained.

According to the study of the inventor, the deformation due to the warpage after lamination and molding is caused by the surface 2a of the resin core 2 on the skin side when the resin core 2 comes into contact with the unheated skin 3. Is lowered, and a temperature difference is generated between the temperature and the temperature of the back surface 2b. Specifically, when the resin core material 2 came into contact with the unheated skin material 3, the temperature of the surface 2a on the skin material side of the resin core material 2 dropped from 130 to 150 ° C to 110 to 120 ° C. Thereby, the temperature of the surface 2a on the skin material side of the resin core material 2 is changed to the surface 2b on the back surface side.
A temperature difference of 10 to 40 ° C. is generated with respect to the temperature of 130 to 150 ° C., and as a result, deformation due to warpage occurs substantially in proportion to the temperature difference.

The present invention has been devised in view of the above-mentioned conventional circumstances, and minimizes deformation due to warpage occurring in a laminated molded product, so that a desired shape can be obtained stably. An object of the present invention is to provide a molding method.

[0010]

SUMMARY OF THE INVENTION In view of the above, the invention according to claim 1 is characterized in that a skin material arranged between the upper and lower dies of a molding die and a sheet heated both sides in advance and arranged to face the skin material. and Jo resin core material, the molding method of the molded laminate which is adapted to laminated and molded by the mold, the heating temperature of the surface of the skin material side of the resin core member, opposite to the skin material side When the resin core material comes into contact with the skin material more than the heating temperature of the surface
By decreasing the temperature difference to a higher temperature, the lamination
The configuration is such that deformation due to warpage of the molded body is reduced .

According to a second aspect of the present invention, in the first aspect of the invention, the resin core material is made of polyphenylene.
In the case of oxide resin (PPO), the resin core material
That the heating temperature of the surface of the skin material side is 130 to 150 ° C., and the skin material side of the resin core member are a configuration in which the heating temperature of the surface opposite to the 110 to 120 ° C..

According to the present invention, first, a skin material having an adhesive applied to the surface on the resin core material side is placed in a molding die (between a lower die and an upper die). On the other hand, by the heating device,
The surface of the resin core material on the skin material side is heated to a predetermined low temperature, and the surface on the side opposite to the skin material side (back surface side) is heated to a lower temperature. According to the second aspect of the invention, specifically, the heating temperature is such that the surface on the skin material side is heated to 130 to 150 ° C., and the surface on the side opposite to the skin material (back surface side) is 110 to 12.
Heat to 0 ° C.

Next, the resin core material heated to a predetermined temperature is arranged in a molding die (specifically, between a skin material and an upper mold arranged in advance). Thereafter, the upper mold is lowered and clamped, whereby a resin core material and a skin material are laminated and molded to obtain a laminated molded body.

Here, the lamination of the resin core material and the skin material is performed.
During molding, the skin material is not heated, so when the surface of the resin core material on the skin material side comes into contact with the skin material, the temperature of the resin core material,
In particular, the temperature of the surface of the resin core material on the skin material side decreases. At this time, the temperature of the surface of the resin core material on the skin material side is:
From being heated to a temperature higher than the opposite surface (back surface side) and the skin material side, the temperature of the surface of the skin material side of the resin core material, the side opposite to the skin material side by temperature reduction (back surface Side) surface temperature. Specifically, according to the invention described in claim 2, the temperature of the surface of the resin core material on the skin material side is 13
Since it is heated to 0 to 150 ° C., the temperature of the surface of the resin core material on the skin material side is reduced to 110 to 120 ° C. The temperature on the skin side of the resin core material after this decrease is
Temperature of the opposite surface (back surface side) and the skin material side 110-12
It is equal to 0 ° C.

Therefore, since the temperature difference of the surface temperature of the resin core material is reduced or becomes zero, the deformation due to the warpage generated in the laminated molded product after lamination and molding is reduced as much as possible, and the desired shape is obtained. Is obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, with respect to a laminated molded product applied to a molded ceiling of an automobile. The same components as those in the conventional example will be described with the same reference numerals.

FIG. 1 is a sectional view of a molded ceiling disposed in the interior of an automobile. In the figure, reference numeral 5 denotes a molded ceiling, and the molded ceiling 5 is formed by a laminated molded body 1 formed into a predetermined curved surface shape. The molded laminate 1 is poly phenylene
A decorative skin material 3 such as cloth, urethane or nonwoven fabric is laminated on the indoor side of a sheet-shaped resin core material 2 made of oxide resin (PPO).

The laminate 1 is formed by a forming apparatus 10 as shown in FIG. That is, the molding apparatus 1
Reference numeral 0 denotes a lower mold 11 having a mold surface 11a having a predetermined shape, and an upper mold 12 located above the lower mold 11 and having a mold surface 12a having a shape corresponding to the shape of the mold surface 11a of the lower mold 11. Is provided. A heating device 14 is provided near the molding device 10.

The laminate 1 is formed as follows. First, a skin material 3 in which an adhesive 4 is applied to a surface of a resin core material side in advance is placed in a molding die 1 which has been heated to 60 ° C. in advance.
3 (between the lower mold 11 and the upper mold 12). on the other hand,
The heating device 14 heats the resin core material 2 to a temperature of 130 to 150 ° C. on the surface 2a on the skin material side and raises the temperature of the surface 2b on the opposite side (back surface side) to 110 to 120 ° C. Heat. Next, the resin core material 2 heated to a predetermined temperature
In the mold 13 (specifically, the skin material 3 placed in advance.
And the upper mold 12). Then, the upper mold 12
The resin core material 2 and the skin material 3 are laminated and formed by lowering the mold and clamping.

Since the skin material 3 is not heated during lamination and molding of the resin core material 2 and the skin material 3, the surface 2a on the skin material side of the resin core material 2 is in contact with the skin material 3. At this time, the temperature of the resin core 2, particularly the temperature of the surface 2 a of the resin core 2 on the skin material side, decreases. At this time, the resin core material 2
Is heated to 130 to 150 ° C., the temperature of the surface 2a on the skin material side of the resin core material 2 drops to 110 to 120 ° C. Temperature of the surface 2a of the skin material side of the resin core member 2 after the reduction is equal to the temperature of 110 to 120 ° C. surface 2b on the opposite side (back side) of the skin material side.

Accordingly, since the temperature difference between the surface 2a and the surface 2b of the resin core material 2 on the skin material side and the back surface side becomes small or zero, deformation due to warpage generated in the laminated molded article 1 after lamination and molding is possible. As a result, it is possible to obtain the laminated molded body 1 in which the expected shape is stably obtained.

[0022]

As described above in detail, according to the present invention, since the temperature difference of the surface temperature of the resin core material becomes small or becomes zero, the temperature difference due to the warpage generated in the laminated molded article after lamination and molding is obtained. Deformation is reduced as much as possible, and it is possible to obtain a laminated molded body having a desired shape stably obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a molded ceiling of an automobile.

FIG. 2 is an explanatory view of a molding device for a laminated molded product.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 laminated molded body 2 resin core material 2a surface on skin material side 2b surface on opposite side to skin material side 3 skin material 11 lower mold 12 upper mold 13 molding mold

────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI B29L 31:58 B29L 31:58 (56) References JP-A-56-118816 (JP, A) JP-A-52-121216 (JP) JP-A-61-233522 (JP, A) JP-A-61-56738 (JP, A) JP-A-6-312464 (JP, A) JP-A-63-46919 (JP, A) Shunichi Kozumi "Thermoforming of plastic plate" Plastic Age Co., September 30, 1985, P54-58, P109-110 (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 51/02-51 / 16 B29C 51/42 B29C 65/02-65/54 B29C 43/18-43/20 B29C 43/32-43/58 B32B 27/00-27/32

Claims (2)

(57) [Claims] 1. A laminating and laminating method of a skin material disposed between upper and lower molds of a molding die and a sheet-shaped resin core material which is heated in advance on both sides thereof and is disposed opposite to the skin material. In the method of molding a laminated molded article that is to be molded, the heating temperature of the surface of the resin core material on the skin material side, the skin material side and
The resin core member than the heating temperature of the opposite surface in contact with the skin material
With the temperature difference higher temperatures decrease the time was,
A method for forming a laminated molded product, wherein deformation due to warpage of the laminated molded product is reduced . 2. The resin core material is polyphenylene oxide.
In the case of resin (PPO), the heating temperature of the surface of the resin core material on the skin material side is set to 130 to 150 ° C., and the heating temperature of the surface of the resin core material on the side opposite to the skin material side is set to 110.
The method for forming a laminated molded article according to claim 1, wherein the temperature is set to 120 to 120 ° C.