Interior automotive trim part and process for producing the same

A manufacturing method and interior technology, applied to vehicle parts, household components, chemical instruments and methods, etc., can solve the problems of reduced rigidity, resin drooping (falling, low melt flow rate, etc.), and achieve the effect of light weight and rigidity

Inactive Publication Date: 2008-03-05
KYORAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a thermoplastic resin for forming automotive interior parts, crystalline propylene block copolymers are generally used from the viewpoint of impact resistance, but there are problems such as drooping (dropping) of the resin in a molten state during blow molding, and as a countermeasure , with different types of polyolefin resins with low melt flow rate
[0007] In addition, on the other hand, in order to reduce the weight and cost of automobile parts, it is necessary to reduce the amount of thermoplastic resin used in automotive interior parts. case, its rigidity is significantly reduced

Method used

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  • Interior automotive trim part and process for producing the same
  • Interior automotive trim part and process for producing the same
  • Interior automotive trim part and process for producing the same

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Embodiment Construction

[0040] Next, in order to describe the present invention in more detail, it will be described with reference to the drawings. Fig. 1 is a perspective view showing a panel with a hollow double-wall structure as an example of an automotive interior part of the present invention, and Fig. 2 is a perspective view showing a part of the panel as seen from the surface of the panel shown in Fig. 1 , and Fig. 3 1 is a partially broken perspective view seen from the inside of the plate shown in FIG. 1 , and FIG. 4 is a partially broken perspective view seen from the surface of the plate of another embodiment. FIG. It is a partially cutaway perspective view seen from the inside of the board of another embodiment. In addition, automotive interior parts are cargo floor panels (automobile cargo compartment covers or cargo racks), rear parcel racks, and the like formed by blow molding.

[0041] In FIGS. 1 to 3 , 1 is a board manufactured by blow molding thermoplastics. The plate 1 is made i...

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Abstract

An interior automotive trim part that even when the amount of thermoplastic resin used is reduced, does not suffer moldability deterioration, and that is lightweight and has appropriate rigidity. Panel (1) of hollow double-wall structure constituting an interior automotive trim part is formed of a polyolefinic resin mixture consisting of propylene homo / copolymer (A) of = 0.93 specific gravity (JIS K7112), 0.3 to 3.0 g / 10 min melt flow rate (JIS K7210) and = 1400 MPa flexural modulus (JIS K7171), crystalline propylene block copolymer (B) of = 0.93 specific gravity (JIS K7112), 0.3 to 1.5 g / 10 min melt flow rate (JIS K7210) and = 1250 MPa flexural modulus (JIS K7171) and high-density polyethylene (C) of 0.925 to 0.965 specific gravity (JIS K7112) and = 0.5 g / 10 min melt flow rate (JIS K7210).

Description

technical field [0001] The present invention relates to a plate-shaped automotive interior part and a manufacturing method thereof, which has an outer wall and an inner wall manufactured by blow-molding thermoplastic plastics, and at least an outer wall and an inner wall are formed between the outer wall and the inner wall. An integral rib is welded to the inner surface of each hollow portion side of the inner wall. The automobile interior part in the present invention is used for a cargo floor panel (car cargo compartment cover or cargo rack), a rear parcel shelf, and the like. Background technique [0002] Blow-molded products used as interior parts for automobiles, etc., with skins made of non-woven fabrics are described in JP-A-63-92431; Sheets for automobile interiors, etc., having a hollow double-wall structure with ribs It is described in JP-A-10-235720; and JP-A-7-278449 about a thermoplastic resin composition to which a crystallization nucleating agent has been add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/00C08L23/10B60R13/02B60R5/04B29K23/00B29L24/00B29L31/58
CPCB29C2049/2412B29L2031/3005B29C2049/2402B29K2023/12B29K2067/00C08L2205/03B29C49/24B29L2007/002B29C2049/4805C08L23/10C08L23/14B29C49/0005B60R13/0268C08L23/16B29K2023/065B60R13/01C08L23/06B29C49/04B60R13/011B29L2031/3017B60R13/02B29C49/4802B32B27/32C08L53/00Y10T428/24661Y10T428/24562Y10T428/24744B29C49/251C08L2666/24C08L2666/02C08L2666/04
Inventor 玉田辉雄
Owner KYORAKU CO LTD
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