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Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel

一种夹芯板、芯材的技术，应用在化学仪器和方法、应用、家用元件等方向，能够解决夹芯板强度下降、体积大、难以提高隔热性或者吸音性等问题，达到保证压缩刚性、保证弯曲刚性或者剪切刚性、实现轻量化的效果

Active Publication Date: 2011-09-28
KYORAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the formation of bubbles by the foaming method, the volume of the void formed by individual concave parts is very large, so it is difficult to improve heat insulation or sound absorption.
[0031] Second, it is difficult to obtain high-quality sandwich panels caused by the forming method of the sandwich panel itself
[0038] However, in order to form or bond it by clamping it with the mold, the surface layer and the core material must be in a molten state, and when the surface layer is continuously drawn from the raw material roll, it needs to be reheated with an infrared heater before it is placed in the mold. However, such reheating can make it difficult for sandwich panels (especially when used as structures) to gain sufficient strength
In more detail, the above-mentioned reheating will adversely affect the forming, so that the bonding part between the skin plates, that is, the parting part of the outer periphery, or the bonding strength between the skin material and the core material will decrease, thus making the clamp The overall strength of the core plate decreases

Method used

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  • Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel
  • Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel
  • Sandwich panel, method of forming core material for sandwich panel, and method of forming sandwich panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0229] As a thermoplastic resin, a propylene homopolymer (manufactured by Sun Aroma Co., Ltd., PF814) with a long-chain network structure of 3.0 g / min MFR at 230° C. is used as a foaming agent and a nucleating agent. Add the amount of talc MB3 weight ratio to the propylene homopolymer, mix it with an extruder, and store it in the cylindrical space between the mandrel and the outer cylinder of the mold, that is, the stocker, and use a cylindrical plunger to fill the cylinder Shaped parison is extruded into the half-mold, and air is blown to the parison with a pressure of 0.1 MPa after closing the mold, thereby obtaining a plurality of concave parts 20 and hollow parts 19 formed by a regular hexagon with a side length of about 4mm. It is the core material 13 (sample 1) of 15 mm. However, MFR is measured based on JIS K-7210 under the condition of a test load of 2.16 kg. The extrusion rate of the stocker used in the present invention is 200cm 3 / sec or more, preferably 500cm 3 ...

Embodiment 2

[0232] Air is not blown with pressure in the parison after mold closing, but the parison is closely contacted on the mold cavity by sucking the air between the parison and the mold. Other processes are the same as in Example 1, thereby producing a A core material 13 having a solid portion and a thickness of 15 mm having a plurality of concave portions 20 formed of a regular hexagon with a side length of about 4 mm (sample 2). The average density of the core material 13 obtained by embodiment 2 is 0.1g / cm 3 (Conversion of foaming rate: 9 times), the equivalent density is 0.08g / cm 3 (Conversion of foaming rate: equivalent to 11 times).

Embodiment 3

[0234] Except for reducing the amount of foaming agent added, the same method as in Example 2 was used to manufacture a solid portion with a thickness of 15 mm core material 13 (sample 3). The average density of the core material 13 obtained by embodiment 2 is 0.13g / cm 3 (Conversion of foam rate: 7 times), the equivalent density is 0.11g / cm 3 (Conversion of foaming rate: equivalent to 8 times).

[0235] After that, a crystalline ethylene-propylene block copolymer (manufactured by Japan Polychem Co., Ltd., Novatec PP EC9) with an MFR of 0.5 g / min at 230° C. was used as a thermoplastic resin, and 30 wt % of talc was mixed as a filler. - Extrude two boards from the mould, close the half-mold to clamp the core material 13 between the two boards, and take it out from the mold after cooling to obtain a sandwich board 10 .

[0236] Thus, it was confirmed that the molding of the composite sandwich panel is practical.

[0237]The inventors of the present invention confirmed the eff...

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Abstract

A light weight sandwich panel which, as a whole, has high rigidity against bending and shearing and in which a core material has high rigidity against compression. A sandwich panel comprising two resin skin material sheets and a thermoplastic resin core material sandwiched between the two resin skin material sheets and planarly adhered thereto. The thermoplastic resin core material consists of a foam resin and has openings formed in at least one surface of the core material. The openings extend inward and have recesses for forming cavities in the thermoplastic resin core material in such a manner that the cavities are closed by the skin material sheets. The number of recesses and the total area of the openings are determined in such a manner that the planar adhesion of the thermoplastic resin core material to the skin material sheets is successfully maintained and that a solid section of the foam resin of the thermoplastic resin core material effectively supports a compression load acting in the direction of the thickness of the thermoplastic resin core material.

Description

technical field [0001] The present invention relates to a sandwich panel, a method for forming a core material for a sandwich panel, and a method for forming a sandwich panel. In more detail, it relates to a method that can not only ensure the overall bending rigidity or shear rigidity but also ensure the core material. A sandwich panel that is inherently compressively rigid and can be easily reduced in weight, and relates to a method of forming a core material for a sandwich panel that can easily adjust the expansion rate and prevent insufficient strength, and a method of forming a sandwich panel. Background technique [0002] In the prior art, the sandwich panel has various uses, for example, it is used for transportation machinery such as automobiles and airplanes, used for building materials, used for casings of electrical equipment, used for sports and entertainment facilities, and the like. [0003] The basic structure of the sandwich panel is: there are two surface pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00B32B3/30B32B5/18B60R5/04
CPCB32B38/06B32B2305/022B29C44/569B32B2250/40B32B27/08E04C2/296B32B5/18B32B3/266B60R5/044B29D99/001B32B3/30B32B37/04B60R13/0268B60R13/0815B32B2605/08B32B2605/003B29C44/00B29C37/0085B32B2307/542B29C70/086B32B2307/546B32B3/28B60R13/01B32B3/12B32B27/065Y10T428/24165Y10T428/24306Y10T428/24331
Inventor 鹫见武彦长井澄雄丹治忠敏
Owner KYORAKU CO LTD
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