1前言塑料异型材的断面设计决定了成品门窗的各项性能、使用功能、组装工艺、外观造型以及成本造价,它涉及到建筑特点、材料性能、模具设计与制造、门窗五金与配件的选择、门窗的组装工艺与安装,以及使用地区的地理环境、气候条件、建筑物风格特点、消费者的使用习惯以及消费审美观等等因素。 1 Introduction Plastic cross-section design determines the performance of the finished doors and windows, the use of functions, assembly technology, appearance and cost of construction costs, which relates to the building features, material properties, mold design and manufacturing, door and window hardware and accessories selection, Doors and windows of the assembly process and installation, as well as the use of the geographical environment, climate conditions, building style characteristics, consumer habits and consumption aesthetics and so on.