Application of full mold casting in car interior t

The application of full mold casting in the mold manufacturing of car interior parts (Part 1)

car interior parts in car interior parts, such as main carpet, trunk side plate, trunk carpet, coat rack, door and ceiling, are the most critical parts of car interior parts. Car interior parts are composed of two parts: fabric and skeleton. Most of the fabrics are needled carpets, tufted carpets, fabrics, etc; The skeleton mostly adopts hemp fiber + polypropylene (PP), cotton fiber + polypropylene (PP), waste fiber + resin, wood powder board, etc. In the manufacturing process, the fabric does not need to be heated, but the skeleton needs to be heated, softened and formed in advance, and then bonded with the fabric, cooled and formed. Moreover, the shapes of these interior parts are free-form surfaces, with fluctuating surfaces, wide height differences and large overall dimensions. Therefore, this kind of mold has its uniqueness. The forming mold cannot use conventional steel materials. At the same time, the mold material is required to not only achieve basic hardness, but also have the characteristics of good thermal conductivity and non rusting

1 introduction

in many cases, molds have laid a good foundation for the development of the casting industry. Such as: casting mold, die-casting mold, etc., they are necessary tools for producing high-quality products. With the vigorous development of the automobile industry in China and the development needs of some new products, casting has also created opportunities for the manufacture of some special molds. Such as: automobile interior trim molds, inspection tools, etc. Among them, full mold casting has the most direct impact on mold manufacturing

the film blown out by high-pressure PE is suitable for all kinds of fresh-keeping bags. Although China's car industry started late, it has developed rapidly. Now the fierce competition has made domestic cars gradually develop from simple CKD assembly to the localization of parts and components. Starting this year, the development of parts and components of new cars is mainly the main raw material for the preparation of expandable polystyrene particles in China, which puts forward higher requirements for the mold manufacturing industry, The application of full mold casting technology in mold manufacturing is accelerated

2 characteristics of full mold casting process

full mold casting was invented by Americans in 1956. From single piece small batch large piece production to large batch small piece assembly line production at first, the industrialized production in the United States, Italy, Germany, Russia, Japan and other countries is the most representative. It was applied to the production of auto parts in the mid-1980s, which stimulated the further improvement and development of this process

the research on full mold casting technology in China began in the mid-1960s, starting from the production of parts blank, mainly cast iron and cast steel. At present, nearly 100 factories produce full mold castings. How can most electronic universal testing machines have static electricity? Small scale. In recent years, due to the entry of Chinese cars into people's families, the automotive industry has developed rapidly, and a number of full mold casting production lines for automotive parts have been built. At the same time, it also began to be used in mold manufacturing

the traditional sand mold casting method is: first, make the wood mold and core according to the drawing, pass the test piece through the clamping device and fix the box in the experimental process, and then divide the box for molding and mold casting. Full mold casting is: first make the original shape of expanded polystyrene plastic that is the same as the casting. When molding, put the original shape in the sand box. After molding, do not take out the foam plastic shape to form a mold with a solid mold cavity, cast the metal gasification shape, replace the shape space with liquid metal, and solidify cold to form a seamless casting with the same shape as the shape

3 requirements for car interior parts mold

car interior parts in car interior parts, such as main carpet, trunk side plate, trunk carpet, coat rack, door and ceiling, are the most critical parts of car interior parts. Car interior parts are composed of two parts: fabric and skeleton. Most of the fabrics are needled carpets, tufted carpets, fabrics, etc; The skeleton mostly adopts hemp fiber + polypropylene (PP), cotton fiber + polypropylene (PP), waste fiber + resin, wood powder board, etc. In the manufacturing process, the fabric does not need to be heated, but the skeleton needs to be heated, softened and formed in advance, and then bonded with the fabric, cooled and formed. Moreover, the shapes of these interior parts are free-form surfaces, with fluctuating surfaces, wide height differences and large overall dimensions. Therefore, this kind of mold has its uniqueness. The forming mold cannot use conventional steel materials. At the same time, the mold material is required to not only achieve basic hardness, but also have the characteristics of good thermal conductivity and non rusting

according to the characteristics of the above products, due to the large size of the interior trim mold, considering the weight of the mold, we choose aluminum alloy as the mold material. In addition, the cooling effect of the mold directly affects the skeleton forming and production efficiency, so the water pipe must be embedded in the mold. Therefore, it is necessary to use the casting method to obtain the blank of the mold that meets the use requirements