According to the characteristics of molding, injection mold and thermoplastic plastic mold are divided into two types. According to the molding process, it can be divided into transfer mold, blow mold, casting mold, hot molding mold, hot pressing mold (compression mold), injection mold, etc. Among them, the hot pressing mold can be divided into three types, i.e., overflow, semi-overflow and non-overflow, and the injection mold can be divided into two types, i.e., cold runner mold and hot runner mold. It can be divided into two types: mobile type and fixed type.
Plastic Injection Accessories,Injection Molded Leakproof Accessories,Plastic Handles For Boxes,Black Plastic Handles,Plastic Injection Molding Service Timeplex Industrial Limited , https://www.catimeplexhk.com
In the front, I believe we have learned a lot of knowledge of the trolley wire, such as classification, product features, and so on. Next, we will introduce to you on the Shanghai trolley wire line the points you need to know when purchasing trolley wires:
Sliding line selection element 1: structure to see the structure of the form, such as the safety combination of the trolley line or separate safety trolley line, just separated from the basic trolley line.
Sliding line selection element two: length selection Sliding line, depending on the length of the sliding line, to consider the total resistance of the sliding line or sliding line material (steel base, aluminum base, copper base, etc.), need to be considered comprehensively.
Sliding line selection element 3: current That is, when selecting the trolley line, the maximum current is calculated according to the total power of all the cranes used, and the quality of the slip line is determined by the magnitude of the current amount, and the maximum current amount is large. Slip lines are generally better. 
There are several elements to pay attention to when purchasing a trolley cable: