JP4188026B2 - Hinge structure of blow molded product with skin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hinge structure of a blow molded product with a skin.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a trunk partition plate or flooring material in an automobile, as shown in FIG. 5 and FIG. 6 which is a sectional view of 6-6, the inside is a cavity 51i and an outer wall surrounding the cavity 51i. A plastic base 53 in which a thin flat hinge portion 52 thinner than the hollow portions 51, 51 is formed between the hollow portions 51, 51 constituted by 51 s, and the base at the time of blow molding of the base 53 A blow-molded product 50 with a skin comprising a skin 54 bonded to one side of 53 and laminated and integrated with the hollow portions 51 and 51 and the hinge portion 52 is often used. The blow-molded product with skin 50 is bent toward the skin 54 by the hinge portion 52 when necessary.
[0003]
Further, the production of the blow-molded product with skin 50 is carried out by setting the skin 54 in advance in a blow molding die made of a split mold, and forming a plastic parison in a plasticized state extruded into a cylindrical shape from an extrusion molding machine. It is carried out by a method in which the blow molding die is sandwiched together with the skin 54, and then air is blown into the parison to inflate the parison so as to be in close contact with the inner surface of the mold and the skin 54, and then cooled.
[0004]
[Problems to be solved by the invention]
However, when the conventional blow molded product with skin 50 is repeatedly bent toward the skin 54 at the hinge portion 52, the skin 54 is located near both edges of the hinge portion 52 as shown in FIG. It is easy to produce the malfunction which peels off from the base | substrate 53 and floats and the appearance is impaired by it.
[0005]
The peeling and lifting of the skin 54 are considered to be due to the following reason. That is, in the blow-molded product with skin 50, since the solid hinge portion 52 of the base 53 has higher rigidity than the skin 54, when the hinge portion 52 is bent toward the skin 54 side, It is bent with respect to the base 53 side. As a result, a margin is generated in the inner skin 54 at the time of folding, and thereby a force is generated in the outer skin 54 to move away from the hinge portion 52 of the base 53. Then, the skin 54 is peeled off and lifted up by repeating the bending.
[0006]
Further, when the blow-molded product 50 with a skin is blow-processed, the hinge portion 52 is sandwiched between the skin 54 and the blow molding die in a state where the parison is crushed, and the skin 54 and the parison are strongly pressure-bonded. And shaped. On the other hand, in the hollow portions 51, 51, the parison is pressed against the skin 54 by the air blown into the parison and shaped. Therefore, the bonding strength between the skin 54 and the base 53 is relatively higher in the hinge portion 52 than in the hollow portions 51, 51. However, even though the adhesive strength between the skin 54 and the base 53 in the hinge portion 52 is high, it is in comparison with the hollow portions 51 and 51, and is not sufficient. For this reason, the peeling of the skin 54 caused by the repeated bending is likely to occur not only on the hollow portions 51 and 51 on both edges of the hinge portion 52 but also on the center side of the hinge portion 52.
[0007]
Further, as shown in FIG. 8, a blow molded product 60 with a skin in which V-shaped hinge portions 62 and 62 are intermittently provided on both edges of the solid portion 61 has been proposed. However, in this case, the surface 63 is easily lifted by the peeling of the skin 63 at the center position between the hinge portions 62, 62, and the lift is easily noticeable. There is a problem of being big. Reference numeral 64 is a base, and 65 is a hollow portion.
[0008]
The present invention has been made in view of the above points, and it is possible to reduce the skin lifting caused by repeated folding at the hinge portion, and to suppress the deterioration of the aesthetic appearance even when the skin is lifted, and to maintain a good appearance. The hinge structure of the product is provided.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a plastic base in which a solid part thinner than the hollow part is formed between the hollow parts, and the hollow part and the medium are bonded to one side of the base during blow molding of the base. In a blow-molded product with a skin comprising a skin laminated and integrated with a real part , a concave groove-like hinge part is provided at an intermediate position between the hollow parts on the surface of the solid part opposite to the skin side. (14A) is provided , and a concave portion having a width wider than that of the groove-shaped hinge portion is formed on the surface of the solid portion on the skin side at a position opposite to the groove-shaped hinge portion. Hinge structure of blow molded product with skin
According to a second aspect of the present invention, there is provided a plastic base in which a solid part thinner than the hollow part is formed between the hollow parts, and the hollow part and the medium are bonded to one side of the base during blow molding of the base. In a blow molded article with a skin comprising a skin laminated and integrated with the real part, a concave groove-like hinge portion is provided at an intermediate position between the hollow parts on the skin side surface of the solid part and the concave groove-like shape is provided. Side grooves are provided on both sides of the hinge portion via protruding strips, and the groove-shaped hinge portion at the intermediate position between the hollow portions is provided on the surface of the solid portion opposite to the skin side. The present invention relates to a hinge structure for a blow-molded article with a skin, characterized in that a concave groove-like hinge portion is provided at a position opposite to.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view of a blow molded article with a skin having a hinge structure according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1, and FIG. 3 is a hinge according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view taken along the line 4-4 in FIG. 3, showing a blow molded article with a skin having a structure.
[0012]
A blow molded article 10A having a hinge structure according to the first embodiment of the present invention shown in FIGS. 1 and 2 is composed of a base 11A and a skin 21A, and hides tires, tools, etc. in the trunk of an automobile. It is a partition plate arrange | positioned in this way. Further, the blow-molded product with skin 10A is manufactured by a known method for producing a blow-molded product with skin, that is, the skin 21A is set in a blow-molding mold, and the plasticized parison is blow-molded together with the skin 21A. Air is blown into the parison sandwiched between molds, the parison is inflated and pressed against the inner surface of the outer skin 21A and the blow molding die to be bonded and integrated with the outer skin 21A and shaped into the inner shape of the blow molding die. It is manufactured by.
[0013]
The base 11A is made of plastic formed by the blow molding, and a solid portion 13A thinner than the hollow portions 12A and 12A is integrally formed between the two hollow portions 12A and 12A. The overall shape of the base 11A is appropriate, but in this example, it is a plate having a rectangular shape in plan view.
[0014]
The hollow portions 12A and 12A are formed in a flat plate shape having a required size, and the inside thereof is a hollow 12Ai and includes the hollow 12Ai and an outer wall 12As surrounding the hollow 12Ai. Has been. The hollow portions 12A and 12A have increased rigidity due to the hollow structure.
[0015]
The solid portion 13A has a solid structure (non-hollow structure) thinner than the hollow portions 12A and 12A, and is formed in a band shape having a constant width between the two hollow portions 12A and 12A. The width between the hollow portions 12A and 12A in the solid portion 13A is appropriately determined, but is generally about 5 mm to 20 mm. Wherein the surface opposite to the skin 21A at solid portion 13A, the hollow portion 12A, an intermediate position between 12A, groove-shaped hinge portions 14A are formed.
[0016]
The presence of the hinge portion 14A allows the skin blow molded product 10A to be easily folded toward the skin 21A, and the blow portion of the skin blow molded product 10A is subjected to blow molding in the blow molding die. 14A is formed, the degree of compression between the plasticized parison and the skin 21A is increased, and the adhesion between the skin 21A and the hinge part 14A of the solid part 13A is further strengthened. Become. As a result, it is possible to reduce the peeling and lifting of the skin 21A caused by the repeated bending. Note that the width, depth, thickness, and the like of the groove-like hinge portion 14A are set as appropriate.
[0017]
Further, in the first embodiment, a concave portion 15A having a width u wider than the width w of the concave groove-like hinge portion 14A is formed on the skin 21A side of the solid portion 13A with the concave groove-like hinge portion 14A. Are formed in opposite positions . Due to the presence of the concave portion 15A, an adhesion area between the solid portion 13A and the skin 21A is increased, and an adhesive strength between the skin 21A and the base body 11A is increased in a wide range in the solid portion 13A. It is possible to further prevent the skin 21A from peeling and lifting when the blow-molded article 10A is bent. In addition, when the skin 21A has a textured pattern on the surface, it is easy to cause a decrease in aesthetics such as grain unevenness in the skin 21A in the solid portion 13A when the blow molded product 10A with skin is folded. In the embodiment, since the blow-molded product 10A with the skin is bent at the concave portion 15A at a position deeper from the surface of the blow-molded product 10A with the skin, the grain unevenness becomes inconspicuous, and a decrease in appearance can be suppressed. The depth of the concave portion 15A is appropriately determined according to the thickness of the hinge portion 14A.
[0018]
The skin 21A is made of an appropriate material, and more preferably, the back surface is made of a nonwoven fabric and the surface is made of a plastic such as a vinyl chloride resin or a thermoplastic olefin resin. In the case where the back surface of the skin 21A is made of a nonwoven fabric, the plastic constituting the plasticized parison enters the nonwoven fabric of the skin 21A during the blow molding, and the skin 21A and the substrate 11A are firmly bonded.
[0019]
The blow-molded product with skin 10B having the hinge structure of the second embodiment shown in FIGS. 3 and 4 is the same as the blow-molded product with skin 10A of the first embodiment except for the structure of the solid portion 13B in the base 11B. It is. Hereinafter, the solid part 13B, which is different from the first embodiment, will be mainly described. In addition, in this 2nd Example, about the same name part as said 1st Example, it attaches | subjects and shows the same number as said 1st Example, About the capital alphabet used with a number, in said 1st Example Instead of “A”, “B” was used in the second embodiment.
[0020]
The solid portion 13B in the second embodiment is formed thinner than the hollow portions 12B and 12B, and a concave groove-like shape is formed on the side surface of the skin 12B of the solid portion 13B at an intermediate position between the hollow portions 12B and 12B. A hinge portion 16B is provided, and side concave grooves 18B and 18B are provided on both sides of the concave groove-like hinge portion 16B via protruding ridge portions 17B and 17B, respectively, and the solid portion 13B is opposite to the skin 21A side. This surface has a structure in which a concave groove-like hinge portion 14B is provided at a position opposite to the concave groove-like hinge portion 16B at an intermediate position between the hollow portions 21B, 21B . The hollow portion 12B includes an internal cavity 12Bi and an outer wall 12Bs that surrounds the cavity 12Bi.
[0021]
By making the skin 21B side in the solid part 13B uneven by the concave groove-like hinge part 16B, the convex strips 17B, 17B and the side concave grooves 18B, 18B, the skin 21B and the The bonding area with the solid portion 13B increases, and the bonding strength increases. Moreover, the plasticized parison is formed at the portion where the concave groove hinge portions 14B and 16B and the side concave grooves 18B and 18B are formed in the blow molding die when the blow molded product 10B with the skin is manufactured. Since the degree of compression between the outer skin 21B and the outer skin 21B increases, the adhesion between the outer skin 21B and the solid portion 13B becomes stronger. As a result, even if the blow molded product 10B with skin is repeatedly bent to the skin 21B side by the hinge portions 14B and 16B, the skin 21B is difficult to peel off from the solid portion 13B and the vicinity thereof, and the skin 21B Can be lifted.
[0022]
In addition, at the time of the blow molding, the portions where the protruding strip portions 17B, 17B are formed in the blow molding die are the portions where the concave groove-like hinge portion 16B and the side concave grooves 18B, 18B are formed. Since the compression between the plasticized parison and the skin 21B is less (weak), the adhesive strength between the skin 21B and the solid portion 13B is such that the hinge portion 16B and the side groove portions 18B, 18B. Than the convex portions 17B and 17B. Therefore, when the blow molded product with skin 10B is bent to the skin 21B side by the hinge portions 14B, 16B, the skin 21B is located at the position of the ridges 17B, 17B in the solid portion 13B. It may peel off from 11B and cause a lift. However, in the blow-molded product 10B with the skin, the skin 21B is raised at the position of the ridges 17B, 17B even in a normal state before bending, so that even if the skin 21B is lifted by the bending, the skin 21B is lifted. Inconspicuous and less likely to lose aesthetics.
[0023]
The width and depth of the concave groove-like hinge portions 14B and 16B, the width of the convex strip portions 17B and 17B, the width and depth of the side concave grooves 18B and 18B, etc. in the solid portion 13B are appropriately determined. .
[0024]
The skin 21B is made of the same material as the skin 21A in the first embodiment, and is set in advance in a blow molding die and adhered to one surface of the base 11B during blow molding of the skin-molded blow molded product 10B. And laminated and integrated with the hollow portions 12B, 12B and the solid portion 13B.
[0025]
The protrusions 17B and 17B are not limited to one each on both sides of the recessed groove-like hinge part 16B in the solid part 13B. It is good also as a partial groove.
[0026]
Further, even on the surface of the solid portion 13B opposite to the skin 21B side, convex and concave portions and side concave grooves may be provided on both sides of the hinge portion 14B to form an uneven shape. Further, the groove-shaped hinge portion may be provided only on one surface of the solid portion 13B, and the convex strip portion and the side groove are formed on both sides of the hinge portion.
[0027]
【The invention's effect】
Above illustrated as described, according to the first aspect of the present invention, the surface opposite to the definitive the solid portion the skin side between the hollow portions, groove-shaped in an intermediate position between said hollow portion A hinge portion is provided, and a concave portion having a width wider than that of the groove-shaped hinge portion is formed on the surface of the solid portion on the skin side opposite to the groove-shaped hinge portion. Decrease in aesthetic appearance can be suppressed by reducing the lift of the epidermis caused by bending at the part.
[0028]
Furthermore, according to the invention of claim 2, the both sides of the solid portion between the hollow portions are provided with a groove-like hinge portion at an intermediate position between the hollow portions, and on the skin side of the solid portion. Has a concave-convex shape with side concave grooves provided on both sides of the concave-groove hinge portion via convex ridge portions, so that it is possible to reduce the lifting of the skin due to bending at the hinge portion, and in the convex ridge portion, Since the epidermis is originally raised, even if the epidermis peels off and rises at the ridges, there is little influence on the aesthetic appearance, and a good appearance can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a blow molded product with a skin having a hinge structure according to a first embodiment of the present invention.
2 is a cross-sectional view taken along the line 2-2 in FIG.
FIG. 3 is a perspective view of a blow molded article with a skin having a hinge structure according to a second embodiment of the present invention.
4 is a cross-sectional view taken along line 4-4 of FIG.
FIG. 5 is a perspective view of a blow molded product with a skin having a conventional hinge structure.
6 is a cross-sectional view taken along the line 6-6 in FIG.
FIG. 7 is a cross-sectional view showing a bent state in a conventional hinge structure.
FIG. 8 is a cross-sectional view of the vicinity of a hinge portion showing still another conventional example.
[Explanation of symbols]
10A Blow-molded product with skin of the first embodiment 10B Blow-molded product with skin of the second embodiment 11A, 11B Base 12A, 12B Hollow part 13A, 13B Solid part 14A, 14B, 16B Groove-shaped hinge part 15A Concave part 17B ridge 17B
18B side groove 21A, 21B epidermis

Claims (2)

A plastic base (11A) in which a solid part (13A) thinner than the hollow part (12A, 12A) is formed between the hollow parts (12A, 12A), and the base at the time of blow molding the base (11A) (11A) In a blow molded article (10A) with a skin consisting of a skin (21A) laminated and integrated with the hollow portion (12A, 12A) and the solid portion (13A) bonded to one side of (11A),
Wherein the surface opposite to the skin (21A) side of the solid portion (13A), the groove-shaped hinge portion (14A) provided at an intermediate position between said hollow portion (21A, 21A), said in On the surface of the real part (13A) on the skin (21A) side, a recessed part (15A) wider than the recessed groove-like hinge part (14A) at a position opposite to the recessed groove-like hinge part (14A). hinge structure with skin blow-molded article, characterized in that) was formed. A plastic base (11B) in which a solid part (13B) thinner than the hollow part (12B, 12B) is formed between the hollow parts (12B, 12B), and the base at the time of blow molding the base (11B) In the blow-molded product with skin (10B) consisting of the skin (21B) laminated and integrated with the hollow part (12B, 12B) and the solid part (13B) bonded to one side of (11B),
A concave groove-like hinge portion (16B) is provided at an intermediate position between the hollow portions (12B, 12B) on the side surface of the skin (12B) of the solid portion (13B) and the concave groove-shaped hinge portion (16B). Side grooves (18B, 18B) are provided on both sides via the ridges (17B, 17B),
The surface of the solid portion (13B) opposite to the skin (21A) side is opposite to the recessed groove-like hinge portion (16B) at an intermediate position between the hollow portions (21B, 21B). A hinge structure of a blow-molded article with a skin , wherein a concave groove-like hinge part (14B) is provided at a position .

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