电动伸缩门的主体包括门体、驱动器和控制系统，它的每个部件都关系到后期的使用质量，伸缩门的门体多采用铝合金和普通管材，采用平行四边形原理铰接，伸缩活动行程大。它的质量好不好，可不可靠，通过下面这些信息就知道了。
The main body of electric telescopic door includes the door body, driver, and control system, and each component is related to the quality of later use. The door body of the telescopic door is mostly made of aluminum alloy and ordinary pipes, and is hinged using the parallelogram principle, with a large telescopic travel. Its quality is not reliable, as can be seen from the following information.
1、门排间距。门排间距是指伸缩门表面铝材之间的距离。有的厂家为了降低生产成本，擅自加大伸缩门的门排间距，超出了行业标准。要知道，伸缩门的造价是按长度计算的。因此，我们在购买电动伸缩门产品时要注意这一点。
1. Door row spacing. The distance between door rows refers to the distance between the aluminum materials on the surface of the expansion door. Some manufacturers, in order to reduce production costs, arbitrarily increase the spacing between the door rows of telescopic doors, exceeding industry standards. You should know that the cost of expansion doors is calculated based on their length. Therefore, we should pay attention to this when purchasing electric retractable door products.
2.滑动结构的质量。在选择电动伸缩门时，要注意推拉结构及其质量。安装时建议尽量选择双推拉结构的伸缩门产品，因为传统的单推拉结构在长期运行后，伸缩门大多松动，而双滑结构的伸缩门则没有这种现象。
2. The quality of the sliding structure. When selecting electric retractable doors, attention should be paid to the push-pull structure and its quality. When installing, it is recommended to choose expansion doors with a double push pull structure as much as possible, as traditional single push pull structures tend to loosen expansion doors after long-term operation, while double sliding structure expansion doors do not have this phenomenon.
3. 是否使用电泳材料。好的电动伸缩门铝型材表面一般都经过电泳和氧化处理。电泳后的铝材表面光滑亮丽，长时间不褪色，市场上还有一些其他工艺段可以使伸缩门的表面光滑美观，但使用一段时间后，其表面逐渐失去原有的外观，因此在购买电动伸缩门产品时要注意。
3. Is electrophoretic material used. The surface of aluminum profiles for good electric retractable doors is generally treated with electrophoresis and oxidation. The surface of the electrophoretic aluminum material is smooth and bright, and it will not fade for a long time. There are other processes on the market that can make the surface of the expansion door smooth and beautiful. However, after using it for a period of time, its surface gradually loses its original appearance. Therefore, it is important to pay attention when purchasing electric expansion door products.
4、机头底板质量。电动伸缩门在使用过程中都是依靠机头的驱动部分带动整个门体的伸缩操作。因此，机头底板的重量和度数很重要，目前市场上的底板有水泥底板、薄铁板和铸铁底板三种。薄铁板和铸铁底板的质量比水泥底板好，成本自然也贵一些。
4. The quality of the machine head base plate. Electric retractable doors rely on the driving part of the machine head to drive the entire door body during use. Therefore, the weight and degree of the machine head bottom plate are very important. Currently, there are three types of bottom plates on the market: cement bottom plate, thin iron plate, and cast iron bottom plate. The quality of thin iron plates and cast iron plates is better than that of cement plates, and the cost is naturally higher.
5. 厂家信息。在选择伸缩门产品的时候，除了上面的组成、结构和细节之外，我们还需要看一下厂家的资料，看是否有行业标准定网站建设  伺服液位仪  防撞墙模具 唐山护栏 遮阳网 风电基础模具，是否是厂家生产的，服务是怎样的等等，尽量把这些写进采购合同中，保护自己的权益。
5. Manufacturer information. When choosing a telescopic door product, in addition to the composition, structure, and details above, we also need to look at the manufacturer's information to see if there are industry standards, whether it is produced by the manufacturer, what kind of service is provided, and so on. We should try to include these in the procurement contract to protect our own rights and interest