热压成型工艺介绍 热压复合成型工艺是通过对木粉板加热，将木粉板中的聚丙烯熔化，使其具 有一定的可塑性，加热后，木粉板正面表层的一层极薄聚丙烯也熔化，此熔化层 将作为一层成型胶水，木粉板的塑性使木粉板在压力下能根据模具形状成型，木 粉板表面的胶水有能力在压力下与特定的覆盖层材料粘结牢固所以木粉板工艺 也就是成型层与覆盖层材料同时结合的一种工艺其中的木粉板是门内板的骨架 材料，或称底板，是生产工艺的基础，是聚丙烯和木粉的混合物我们公司热压 复合成型工艺主要生产的是桑塔纳、3000GP门板、奇瑞嵌、JAC嵌饰板这些产品在门板的热压成型过程中，工艺参数是影响产品质量的一个重要因素压制 过程中出现的许多质量问题，往往与工艺参数调节不当有关冷却系统的温度一 般设置在5T5°C，而模温中上模的温度要比下模高5°C压机油温要小于40°C 压机系统气压中的供气气压约为6bar；网带气压为2~4bar，以使网带绷紧；工 作气压控制在l~3bar烘箱中的工艺参数，红外灯循环温度应控制在360~560°C ; 木粉板加热温度控制在160~220°C，因为过高有可能达到木粉板的燃点，引起木 粉板燃烧；加热时间控制在 30~70s; 上、下加热板的功率一般设在 60%~95%；压 制参数中的压机压制压力控制在75~120bar；切刀冲切压力控制在70~110bar; 压制时间控制在20~30s；切刀冲切保持时间控制在5~15s。
热压成型后的门板必须经过冷却定型才能保证产品的稳定性，接着产品需要 通过进行冲孔处理，对于冲孔后的产品，我们通过量具测量来控制孔位不发生偏 位最后按产品类型的不同还要进行摩擦焊机焊接、超声波焊接、高频焊接等工 艺完成产品的最终成型Pressing composite molding introducePressing composite molding process by heating the powder board, wood flour board of polypropylene melting, to have a certain plasticity, when heated, wood flour-positive extremely thin surface layer of polypropylene is also melting, This will serve as a melting of the molding glue, wood flour plate so thatthe plastic wood flour board underpressure to mould the shape under themolding, powder surface of the glue have the ability under pressure with specific cover material bonded firmly. Therefore, wood flour-forming process that is covered with layers of materials combined with a process. The powder-plate frame is the building material, or floor, is the production process is based on polypropylene and wood flour mixture. Our pressing composite molding process is the main production Santana, 3000 GP door, Chery inlay, JAC plaque containing these products.In pressing the door molding process, the process parameters that affect product quality an important factor. In the process of suppression of the many quality problems are often associated with improper regulation of the process parameters. The temperature of the cooling system installed in the general 5-15 C, and on-die temperature in the high-temperature than under 5 C. Press oil temperature to less than 40 C. Press air pressure in the gas supply system pressure of about 6 bar; network with depression for 2 ~ 4 bar, so that the belt tightening net; work pressure control in the 1 ~ 3 bar. Oven in the process parameters, infrared light cycle of temperature control in the 360 ~ 560 °C ; powder plate temperature control in the 160 ~ 220 C, because there may be too high to the plate to ignite wood flour, wood flour plate from burning heating time Control in 30 ~ 70 s; upper and lower heating power in general 60% to 95%; parametersinthesuppressionofpresssuppressionofthepressurecontrol inthe75~120bar;Cutterpunchingpressurecontrolinthe70~110bar; control suppress time In 20 ~ 30 s; Cutter punching time to maintain control in 5 ~ 15 s.After pressing the door molding must be cooling stereotypes can we guarantee the stability of products, then products have to be dealtwith through punching, punching after the products, we measured by measuring tool to control the holes no deviation. Finally, different types of products but also for friction welding machine welding, ultrasonic welding, high-frequency welding products, such as the completion of the final molding.。