JPH0481934B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a blow-molded product in which a skin is disposed on a predetermined part of the surface of a blow-molded product made of synthetic resin with a soft layer interposed therebetween. The present invention relates to a blow-molded product such as a console box for automobile interior parts that provides a soft feel, and a method for manufacturing the same.

<Prior Art> Conventionally, this type of blow molded product was as shown in FIG.

This molded product 1 includes a soft layer 3 made of foamed PP on the top surface of a molded product body 2 made of PP, and a skin 4 that is slightly harder than the soft layer 3 over the top surface of the soft layer 3 and both sides of the molded product body 2. It was made up of covered.

Describing the manufacturing of this molded product 1, first,
As shown in FIGS. 7 and 8, the skin 4 with the soft layer 3 adhered to a predetermined portion in advance is shaped into a predetermined shape and placed in a predetermined split mold 9 of a mold 7 for molding the molded product body 2. have it set up.

Then, the parison 6 extruded from the extruder 5 is placed between the split molds 8 and 9, and as shown in Figures 9 and 10, the mold is clamped while blowing air into the parison 6 to form the molded product body 2. After cooling for a predetermined period of time, the mold is released and the end portions are treated to obtain molded product 1.
was manufacturing.

In addition, 10 indicates the molded product body 2 and the skin 4 during molding.
This is a slide core for terminal processing in order to improve the appearance of the molded product 1 by rolling up the molded product 1 and placing the end portions on the bottom surface of the molded product 1.

<Problems to be Solved by the Invention> However, in the conventional molded product 1, the soft layer 3 is disposed only on a predetermined portion of the surface of the molded product body 2. In the outer circumferential portion 2a of the molded product body 2, the cooling effect from the mold surface 9a of the split mold 9 causes only the area where the soft layer 3 and the skin 4 are to be provided and the area where the skin 4 is provided, depending on the presence or absence of the soft layer 3. The parts where the soft layer 3 is disposed tend to be wavy along with the molded product main body 2, and defective products are likely to occur.

Therefore, in order to prevent the occurrence of defective products due to the non-uniformity of the cooling effect, when conventionally molding the molded product 1, the cooling time before opening the mold during blow molding is lengthened to ensure almost uniform cooling of each part. As a result, it took a long time to mold the molded product 1.

The present invention solves the above-mentioned problems, and aims to provide a blow-molded product and a method for manufacturing the same, which can suppress undulation in the area where a soft layer is provided and shorten the molding time. do.

<Means for solving the problems> The blow molded product according to the present invention is a blow molded product in which a skin is integrally molded with a soft layer interposed at a predetermined portion of the surface of the molded product body, and the soft layer is The above-mentioned problem is solved by disposing a rigid shape-retaining plate on the entire surface of the molded product body.

In addition, in the method for manufacturing a blow molded product according to the present invention, when molding a molded product body that is blow-formed from synthetic resin, a soft layer and a skin layer are provided at a predetermined portion between a parison for molding the molded product body and a mold. In a method for manufacturing a blow molded product, in which a skin is disposed on a predetermined part of the surface of the molded product body with a soft layer interposed therebetween, during molding of the molded product body, the entire surface of the soft layer on the parison side is The above-mentioned problems are solved by disposing and molding a rigid shape-retaining plate.

<Operations and effects of the invention> In the blow molded product and the manufacturing method thereof according to the present invention, when molding the molded product body, a shape retaining plate having rigidity is disposed on the entire surface of the soft layer on the molded product body side. Therefore, the cooling effect from the mold is different between the part where the soft layer is placed and the part where the soft layer is not placed in the main body of the molded product formed from the parison, and the part where the soft layer is placed is different. Even if the molded product tries to deform in a wavy manner, the wavy deformation is regulated by the shape retaining plate, and a molded product having a predetermined shape can be obtained without increasing the cooling time before opening the mold.

Therefore, in the blow molded product and the manufacturing method thereof according to the present invention, even if the cooling time during molding is shortened, waviness in the area where the soft layer is provided can be suppressed, and the molding time can be shortened. This can improve productivity.

<Example> An example of the present invention will be described below based on the drawings.

FIG. 1 shows a cross-sectional view of a molded product 11 according to an embodiment. This molded product 11 has a box shape with an open bottom and a closed top, and is used as a console box for automobile interior parts. be.

This molded product 11 has an inverted U-shaped cross section and has an outer peripheral part 12a and an inner peripheral part 12b, and has a molded product main body 12 made of PP, and a rigid part made of PP disposed on a part of the upper surface of the outer peripheral part 12a. a shape-retaining plate 23 and a foam disposed on the upper surface of the shape-retaining plate 23;
A soft layer 13 made of PP, and a soft layer 1 disposed from the top surface of the soft layer 13 to both sides of the molded product body 12.
The outer skin 14 is made of soft PVC that is slightly harder than 3.

Note that the skin 14 has a molded product main body 12 on its back surface.
At the time of blow molding, a part of the parison 16 bites into the back surface of the skin 14, and the skin 14 and the molded product body 12 are bonded together without the use of adhesive by a so-called anchoring effect. synthetic fiber cloth, non-woven fabric, or foamed PVC,
A porous layer such as PP is placed on the back side.

To describe the manufacturing of this molded product 11, the soft layer 13 is attached to a predetermined portion of the skin 14 using an adhesive, and the molded product main body 12 of the soft layer 13 is
The shape-retaining plate 23 is attached to the entire back surface, which will be the side surface, using an adhesive, and the skin 14 to which these members are attached is predetermined so that it can be placed on the molded product main body 12. The shaped skin 14 is shaped into a predetermined shape and placed in a predetermined split mold 19 of the mold 17.
(See Figures 2 and 3). Note that when shaping the skin 14 into a predetermined shape, a split mold 19 for molding the molded product body 12 shown in FIGS. 2 and 3 is used,
The skin 1 is formed by vacuum forming or press forming.
4 may be shaped into a predetermined shape. In addition, in forming the skin 14, a thin flexible PVC sheet is shaped into a predetermined shape to form the skin 14,
Thereafter, the soft layer 13 and the shape retaining plate 23 may be adhered to predetermined locations.

Thereafter, with the skin 14 placed on the predetermined split mold 19, the parison 1 is placed between the split molds 18 and 19.
6 from the extruder 15, and as shown in FIGS. 4 and 5, while blowing air into the parison 16,
The split molds 18 and 19 are closed, and the slide cores 20 and 20 are moved and clamped to form the molded product body 12.

After cooling for a predetermined period of time, the mold is opened and released, and the end portions are treated to obtain the molded product 11 shown in FIG. 1. At this time, since the molded product 11 is provided with a shape-retaining plate 23 on the entire back side of the soft layer 13 that is in contact with the parison 16, the outer circumferential portion 12a of the molded product main body 12 is The part where the soft layer 13 is disposed receives the cooling effect from the hard layer 19 more unevenly than other parts, and even if that part tries to cause undulating deformation, the deformation is prevented by the shape retaining plate 23. Even if the cooling time is reduced by about 3 minutes compared to the conventional molded product 1, molding can be performed without producing any defective products.

Note that this shape retaining plate 23 is attached to the molded product main body 12.
molded product body 1 if it is the same as the molding material of
2. During molding, the parison 16 is attached to the shape retaining plate 23.
Because it is easy to weld to the molded product body 12 during molding,
This makes it easier to suppress the undulation of the molded product body 12 and the shape retaining plate 23 after molding. By the way, the shape retaining plate 23 is attached to the molded product body 12.
When changing to another synthetic resin plate or metal plate made of a different material, a plurality of holes are bored in the shape-retaining plate, and when the molded product body 12 is molded, the parison 16
If it is drilled into the soft layer 13 through those holes,
A similar effect can be obtained.

In addition, as the soft layer 13, in the embodiment, foamed
The example is made of PP, but if you can get a soft feel, you can use other resin or rubber foams,
Materials such as cloth and cotton may also be used.

Furthermore, in the molded product 11 of the example, hollow portions 12A, 12A are provided on both sides of the cross section of the molded product main body 12,
Although a shape with a contact part 12B in the center of the cross section where the outer peripheral part 12a and the inner peripheral part 12b are in close contact is shown, of course, even if it is a hollow molded product without the contact part 12B, the back side of the soft layer A similar effect can be obtained by disposing a shape retaining plate.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a molded product showing an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view showing a state in which the parison is extruded during molding of the same embodiment, and FIG. Figure 4 is a cross-sectional view of the same example when the mold is closed during molding, Figure 5 is a cross-sectional view showing the slide core moved during molding of the same example, and Figure 6 is a cross-sectional view of a conventional molded product. Figure 7 is a vertical cross-sectional view showing the extruded state of the parison during molding in a conventional example, Figure 8 is a cross-sectional view of the same, and Figure 9 is a cross-sectional view when the mold is closed during molding in a conventional example. FIG. 10 is a sectional view showing a state in which the slide core is moved during molding in a conventional example. 1, 11... Molded article, 2, 12... Molded article body, 3, 13... Soft layer, 4, 14... Epidermis,
6, 16... Parison, 7, 17... Mold, 23
...Shape retention plate.

Claims (1)

[Scope of Claims] 1. A blow-molded product in which a skin is integrally molded with a soft layer interposed at a predetermined portion of the surface of the molded product body, and the soft layer has rigidity over the entire surface on the side of the molded product body. A blow-molded product characterized by being provided with a shape-retaining plate. 2. When blow molding a molded product body made of synthetic resin, blow molding is performed with a soft layer and a skin interposed at a predetermined portion between the parison for molding the molded product body and the mold, and the molded product In the method for producing a blow-molded product, in which the skin is disposed on a predetermined portion of the main body surface with the soft layer interposed therebetween, a shape-retaining plate having rigidity is provided on the entire surface of the soft layer on the parison side during molding of the molded product main body. A method for manufacturing a blow-molded product, characterized in that the blow-molded product is molded by disposing.