New high-efficiency car door products mainly for residential elevators and security room elevator markets
Wittur Door System,Door System Closer,Telescopic Elevator Door,Concealed Sliding Door Suzhou Keffran Parts Co.,ltd , https://www.keffran-elevatorsmart.com
Safe and reliable
The car door comes standard with car door lock and emergency unlocking device, which meets the latest EN81-20/50 standard and the latest GB7588-2003 No. 1 amendment.
Compared with car door locks of other manufacturers, Wittur car door locks are easier to use, safer and more reliable.
Compact design
The drive part of the door machine adopts the matched Wittur Augusta Prime mechanical design, the overall mechanism is compact, and the system stability is better. The toothed belt of the motor is installed in a relatively closed space, which can be better protected to prevent foreign matter from entering the transmission device.
Lower energy consumption
Brushless motor is adopted, which has low power consumption and is easy to control.
Easy to install
The relatively compact and simple design concept of the driving part of the door machine makes the overall weight of the door machine very light, which is convenient for on-site installation and debugging.
Polycarbonate (PC) is a versatile thermoplastic that can be processed through various methods, including injection molding, extrusion, blow molding, thermoforming, printing, bonding, coating, and machining. Among these, injection molding is the most widely used due to its efficiency and ability to produce complex shapes with high precision.
Before processing, it's crucial to pre-dry polycarbonate to ensure the moisture content remains below 0.02%. Even small amounts of moisture can cause issues during high-temperature processing, such as discoloration, silver streaks, or bubble formation in the final product. This sensitivity highlights the importance of proper drying procedures.
At room temperature, PC exhibits significant elastic deformation capabilities, making it suitable for cold forming techniques like cold drawing, rolling, and stamping. For extrusion applications, the molecular weight of PC should be above 30,000, and a graded compression screw is typically recommended. The screw’s length-to-diameter ratio should range between 18:1 and 24:1, with a compression ratio of around 2.5:1. These parameters help achieve better melt flow and improve the quality of the final product.
Extrusion blow molding, injection-blowing, and injection-pull-blowing are effective techniques for producing high-quality, transparent bottles from PC. Additionally, PC can be blended or alloyed with other polymers to enhance its properties. These combinations not only improve processability but also increase resistance to stress cracking and enhance overall performance.
Common PC alloys include PC/ABS, PC/ASA, PC/PBT, PC/PET, PC/PET/elastomer blends, PC/MBS, PC/PTFE, and PC/PA. Each blend offers unique advantages. For example, PC/ABS combines the heat resistance, toughness, and impact strength of PC with the improved flowability and surface finish of ABS, while reducing overall density and cost. Similarly, PC/PA alloys offer enhanced dimensional stability and chemical resistance.
By blending PC with other materials, manufacturers can tailor the properties of the final product to meet specific application requirements, making it a popular choice across industries such as automotive, electronics, and consumer goods.