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Manufacturing method of molded article, material for injection welding, and molded article

A manufacturing method and technology for molded products, which are applied in the fields of manufacturing of molded products, materials for injection welding and molded products, to achieve the effect of high welding strength

Active Publication Date: 2019-01-08
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when primary moldings are welded using the materials for injection welding described in these patent documents, there is still room for improvement in the welding strength between primary moldings.

Method used

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  • Manufacturing method of molded article, material for injection welding, and molded article
  • Manufacturing method of molded article, material for injection welding, and molded article
  • Manufacturing method of molded article, material for injection welding, and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] [Examples 1 to 12, Comparative Example 1]

[0126] Put PA-1~PA-9 into the supply port of a co-rotating twin-screw extruder (“TEM-26SS” manufactured by Toshiba Machine Co., Ltd.), and melt under the condition that the barrel temperature is 30°C higher than the melting point After kneading, it is extruded into a strand form, cooled, and cut to produce a pellet-like material for injection welding. In the case of using an inorganic filler, the inorganic filler is injected into the extruder from the downstream side of the polyamide supply port to produce a pellet-shaped material for injection welding. Using the obtained pellets, evaluations of chemical resistance and welding strength were carried out according to the aforementioned methods. The results are shown in Table 1.

[0127] [Table 1]

[0128]

[0129] In Examples 1 to 12 in which the material for injection welding contained 0.05 to 1 mol % of triamine units relative to the total dicarboxylic acid units, high w...

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Abstract

The present invention provides a method of manufacturing a molded article in which a plurality of primary molded bodies are joined by an injection welding method, which can produce a molded article with high welding strength between the primary molded bodies. The present invention relates to a method of manufacturing a molded article, which includes the step of injecting and welding an injection welding material containing polyamide to the periphery or inside of the butted portions of the plurality of butted primary molded bodies. , the polyamide comprises dicarboxylic acid units and diamine units, and the aforementioned polyamide further comprises 0.05 to 1 mol% of triamine units relative to all dicarboxylic acid units.

Description

technical field [0001] The present invention relates to a method of manufacturing a molded article in which a plurality of primary molded bodies are joined by injection welding. The present invention also relates to an injection welding material used when joining a plurality of primary molded bodies by an injection welding method, and a molded article joined using the injection welding material. Background technique [0002] In recent years, in order to improve the fuel efficiency of automobiles, the demand for lightweight car bodies has gradually increased, and metal parts have gradually developed into resins. Advantages of resinization include, in addition to weight reduction, improvement in workability, quietness, and high degree of freedom in shape. [0003] In order to further increase the advantage of the degree of freedom of shape, a method of manufacturing various hollow body parts by combining and welding a plurality of primary molded bodies has been developed. As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/16B29C45/26C08L77/00
CPCB29C45/0062B29C2045/0063C08G69/265C08K7/14C08L77/06B29C45/14475B29K2077/00B29L2031/749
Inventor 武田英明
Owner KURARAY CO LTD
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