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For the interior and exterior parts of automobiles, the function of the parts and the material properties of the parts are determined. The factors to be considered in the selection of materials are as follows:
For the interior and exterior parts of a car, the main considerations are the function of the part and the material properties that determine the function of the part. The factors to be considered in the material selection are as follows.
1, mechanical: the form and size of the stress, the form and time of the load, anti-fatigue requirements, allowable deformation, overload and accidental stress conditions, impact resistance requirements.
2, Heat: normal operating temperature, maximum and minimum operating temperature.
3, Environment: contact with solvents and various steam, chemical reaction with acid and alkali, water absorption, affected by ultraviolet light and environmental oxidation, sand, rain erosion, mold, microbes and so on.
4, toxicity: toxicity in flame retardant, toner, additive or decomposition process.
5, Appearance: transparency, surface effect, consistency and durability of color.
6, size: allow for error and dimensional stability, weight factor.
7, production: processing technology selection, assembly methods, trimming and secondary processing, quality control and supervision.
8, economy: material costs, mold costs, machining costs, auxiliary equipment costs, operating costs, mechanical maintenance costs.
9, regulations: regional safety regulations (flame retardant, food, medicine), industrial industrial regulations (automotive industry, electronics industry, etc.).
10, the processability of raw materials: processing difficulty, processing costs, processing waste, processing accuracy, processing shape.
11, Recyclable: The material selection is singular, universal and easy to recycle.
12, model grade: according to the grades of different models, determine the materials.
The above principles apply to the selection of materials for manufacturers of automobile floor mats.
The material selection process mainly includes the following steps:
1. Propose the performance items required for plastic parts, including mechanical properties, thermal properties, processability and other physical and chemical properties, in addition to the specific properties of the various functions.
2. Requirements for materials in accordance with the requirements of molding, use, decoration, connection and performance verification of the parts.
3. Initially select a portion of the material.
4. Focus on comparing and analyzing the performance and cost of materials within the target range and selecting the appropriate materials.
5. Perform performance verification and component performance verification on selected materials.
For parts that are used in one molding, it is necessary to distinguish which properties are "primary performance", which are "related performance", and which are "secondary performance". The main performance is the key performance that determines the performance of the product and is the property that the material must have. Related performance is an auxiliary performance that serves the primary performance of the product. Secondary performance is a performance that has little to do with product performance and is a dispensable performance of the material.
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Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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