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Thick Vacuum Forming In The Application Of The Bus

Thick Vacuum Forming In the application of the bus

Application of Thick Film Blister in Passenger Car

  With the rapid development of the traffic network, the demand for passenger cars is increasing, and the safety and comfort requirements of the bus are also increasing. Interior trim, luxury has become one of the important signs of high-end luxury bus.

 Interior parts mainly refers to the plastic parts, the molding process is injection molding, plastic, blow molding, extrusion and so on. Injection molding production of high efficiency, high precision molding products can be formed complex parts, but the mold into the cost of large, slow product updates, parts size by the molding machine specifications, therefore, injection molding applications in the bus is mainly dashboard , Air conditioning outlet and other complex parts and require a precise fit with the parts. Blister molding is a small cost of mold, suitable for large-scale parts production, suitable for upgrading fast products, but the size of the accuracy is not high, low production efficiency. As the bus interior is a large cover-based, precision is not high, and the bus itself is not high production, a model with an annual output of about a few hundred, with customers often on the car internal configuration of various requirements, Parts size and appearance of more or less change, so the plastic process on the interior of the passenger car used more. Blow molding, extrusion molding are the production of specific requirements of plastic parts, in the field of passenger cars in the scope of application of smaller.

 Blister molding process can be divided into two kinds of plastic sheet and plastic blister. The material used for the blistering is mainly acrylonitrile-butadiene-styrene (ABS) sheet, with a small part of the plexiglass (PMMA) sheet. Bus cab on the left and right sides of the inner plate, the top of the inner plate, the rear of the board and some electrical box cover and other cover are used ABS sheet molding. There is also a trend is to use a composite ABS plate instead of the general ABS sheet, composite ABS sheet is added to the plate with a layer of foam polypropylene or PVC material, together with a striped leather or feel like leather sheet. Requires a transparent dashboard of the sound cover, requiring anti-aging body outside the breathable grille, the general use are all plexiglass molding. The soft skin coating process is mainly used in the passenger instrument table, the matrix is generally glass steel parts (FRP), in the glass steel pieces on the suction hole suction suction skin, the skin material is mainly PVC plus foam polypropylene (PVC / PPF) composites.

Now take the inner panel of the passenger car as an example, the process of blistering. Parts of the size of 1200mm × 1000mm × 250mm, the use of the ABS plate is the size of 1400mm × 1200mm × 4mm. First of all to confirm the color of the plate pattern, because the decoration of the color and striae is very important, the passengers on the train first felt the car environment. And then look at whether the sheet from the open envelope of the bag, if not, the plate also need to dry in the drying room. Because if the sheet is wet, the surface of the sheet will be heated, the appearance of quality deterioration, serious also make the sheet in the molding process in the crack.