The screw section of the film blowing machine is fixed in the groove depth of the screw groove. The main function of the film blowing machine is to provide sufficient pressure in addition to the mixing and delivery of the melt, and to maintain the uniform temperature of the melt and to stabilize the flow of the molten plastic. If the length is long, then the mixing effect is good; if the metering section is too long, the melt may easily stay for a long time and cause thermal decomposition; if it is too short, the temperature may be uneven.
The film blowing machine screw section is screw groove fixed depth, beyond its main function of mixing, transporting melt glue, and metering, it also need to provide sufficient pressure to maintain uniform melt glue temperature and to stabilize molten plastic flow. Long metering zone means good mixing effect, but if it is too long, the melt will stay much longer, lead to thermal decomposition. However, too short metering zone causes uneven temperature.
Specification:
Film blowing machine screw length-diameter = screw working length (mm) / screw diameter (mm)
Film blowing machine screw compression ratio = feed tooth depth (mm) / metering tooth depth (mm)
Film blowing machine screw features:
1）Film blowing machine screw has high length-diameter ratio, strong plasticizing capacity, even temperature distribution, and automatic temperature control properties；
2）Rotary nose is optional according to customer’s requirement；
3）Various coil forms for choose；
4） Film blowing machine screw adopts advanced converter technique, energy-efficient；
Products advantages：
1、The film blowing machine screw adopts the most advanced alloy spraying technology. After precision machining, the hardness is higher, the corrosion resistance is better, and the service life is long. It is the life of the nitrogen treatment screw is 2~3 times;
2、The screw has a large ratio of length to diameter, strong plasticizing ability, uniform temperature distribution, automatic temperature control, and good performance in the use of blown film bright uniform products;
3、The whole machine has compact structure, stable operation, single arm structure, economical and practical, traction device integration and self-adjusting lifting;
4、Adopt advanced frequency conversion technology, high efficiency and energy saving;
5、Various forms of curl, can be arbitrary choice;
6、The rotary head can be configured according to the user's needs.
