1、the material of barrel and screw is 38CrMoAlA，and it also under goes the process of nitriding technics.

2、the nitriding depth for screw is 0.5~0.6mm，rigidity（HV）800~900，surface roughness Ra≤0.8um.

3、the nitriding depth for barrel is 0.5~0.7mm，rigidity（HV）over 950，inner surface roughness Ra≤1.6um.

4、Gear box adopts driving of hard tooth and inclined tooth surface made by Jiangyin Gear Box Company Ltd，the gear undergoes the cementite process of 20CrMnTi, the gear for distributor box adopts 38CrMoA1A nitriding process, the shaft is made of 40Cr material. The pushing bearing for the distributor uses the haer’bin bearing, which runs smoothly and stably.

5、main motor power 37KW，max capacity is 120-160kg/h

6、the cooling system for barrel adopts air cooling, the screw cooling uses cycling oil cooling in the inner bore, and the heater is casting aluminum, heating power is 32KW.

7、The main motor adopts frequency conversion device which have the function of speed adjusting, the permitted voltage ranges is±15%, the temperature control meter is RKC meter made in Japan, and the tolerance ranges is ±1℃，the measuring components adopts thermocouple.

8、It equipped with water circle type vacuum exhaust device, the vacuum power is 2.2kw, and the vacuum degree is 0.093Mpa.

9、The rotary speed of main motor and measuring screw motor can be adjusted synchronous at the same time，also can be operated separately, and the main motor adopts current over-loading protection device.