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Vibration isolation device
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A technology of vibration isolation and forming body, which is applied in the directions of transportation and packaging, non-rotational vibration suppression, and layered products. Excellent thermal properties and enhanced strength
Active Publication Date: 2015-03-25
SUMITOMO RIKO CO LTD
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However, if the resin bracket is formed with a thick wall, internal defects such as pores and cracks are likely to occur due to crystallization of the resin, large molding shrinkage (sink marks), etc., and high residual stress may also occur. There is a disadvantage that the overall strength of the vibration isolator is reduced
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[0088] Next, examples and comparative examples will be described together. However, the present invention is not limited to these Examples.
[0089] First, before describing the examples and comparative examples, the following materials were prepared as the material for the surface layer and the material for the core layer for the resin bracket.
[0099] Chopped fiber (manufactured by NEC Glass Co., Ltd., trade name "CS03T275H"), (fiber diameter: 10 μm, average fiber length: 3 mm) (surface-treated product treated with an aminosilane coupling agent)
[0100] (glass fiber y (long fiber))
[0101] Glas...
manufacture example 1
[0106] When producing pellets, a co-rotating twin-screw extruder (manufactured by Toshiba Machine Co., Ltd., TEM37BS) was used. In this co-rotating twin-screw extruder, a main hopper for feeding the main raw material and a continuous quantitative supply device (manufactured by Kubota Corporation) for quantitatively supplying the main raw material to the main hopper are provided in the upstream part, and in the middle part There is a side feeder for feeding auxiliary raw materials, and a cooling water tank and a granulator are installed in the downstream.
[0107] The extrusion temperature of the co-rotating twin-screw extruder is set at 270 ° C ~ 300 ° C, from the position of the upstream part of the co-rotating twin-screw extruder, as the main raw material, use a continuous quantitative supply device from the main hopper to the co-rotating twin The axial extruder supplies the thermoplastic resin, that is, PA66, to 65 parts by mass. On the other hand, from the position in the ...
manufacture example 2～7、 manufacture example 9
[0109] Pellets were produced in accordance with Production Example 1 except that the respective components shown in the table were mixed in the ratios shown in the following Table 1.
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Abstract
An object is to provide a vibration isolator being superior in strength as a whole. The vibration isolator includes a rubber elastic body (3) having a vibration isolating function; and a resin bracket (2) integrally formed with the rubber elastic body (3) and fixed to a base body while supporting the rubber elastic body (3). The resin bracket (2) includes a sandwiched molding having a core layer (2a) and skin layers (2b) sandwiching the core layer (2a), a resin composition (A) included in the skin layers (2b) includes a first thermoplastic resin and an inorganic filler, a resin composition (B) included in the core layer (2a) includes a second thermoplastic resin and an inorganic filler, a volume ratio of the skin layers is in a range of 40 to 70% of the entire sandwiched molding, and a bending modulus (E1) of the skin layers, a maximum bending strain (µ1) of the skin layers, a bending modulus (E2) of the core layer, and a maximum bending strain (µ2) of the core layer satisfy the following expressions (1) and (2): 1 < E �¢ 1 / µ �¢ 1 < E �¢ 2 / µ �¢ 2 < 10 1 µ �¢ 1 / µ �¢ 2 > 1 2 µ �¢ 1 / µ �¢ 2 > 1
Description
technical field [0001] The present invention relates to a vibration isolating device, and more specifically, to a vibration isolating device for an automobile used as an engine mount or the like of the automobile. Background technique [0002] Conventionally, vibration isolators of various types are used in automobiles, railway vehicles, and the like for the purpose of preventing transmission of vibrations and shocks to rigid members. As such a vibration isolating device, a large number of devices made of a metal material obtained by vulcanizing rubber bonded to a support member made of a metal material and a rubber composite have been developed and are actually used. Recently, however, vibration isolators (engine mounts, etc.) that replace conventional metal support members ( Instead of metal brackets, etc.), lighter resin support members (resin brackets, etc.) made of resin materials are used, and are made of resin and rubber composites. [0003] In the above-mentioned v...
Claims
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Application Information
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