This blog continues from the previous blog to take the YQL-Φ100 / 5 continuous lead extruder as an example to introduce the main components of the continuous lead extruder：

6.  100/5 type extrusion host

Gear box of extruder is of horizontal structure with leakage proof treatment, motor is connected with spiral bevel gear, the other gears is forged with alloy steel and cast steel and manufactured with fine finish rolling.

Extruding screw conveys the lead vertically , which reduces effects of lead layer gravity.

Axial die adjusting and die unloading at the entry of die are from the electric hydraulic station, which is convenient to adjust the thickness of lead layer and replace the die stock and die tip. Equality of thickness of lead pipe is achieved with the 4 screws to adjust the die cover. At the exit of die is mounted a special spraying unit to supply for the cooling and crystallization of lead layer.

7.  Gear Lubricant Oil System

The gear box is oil stored tank, its whole structure for the machine is reasonable and compact.

The lubricant oil line consists of oil pump, filter, dual coolers, pressure gauge, etc. additionally is mounted pressure relay to supervise the lubricant oil line so that it can automatically alarm due to lack of oil. It saves maintenance time and ensures to resume production because of oil supply by pump.

Lubricant oil enters into the gear box in 5 lines and spray lubricant oil on contact points of gears and each bearing.

8.  Internal Water circulating & Cooling System

Internal cooling water tank for the machine is under the ground , that is , it is at the bottom of host machine, consists of cooling water pump, safety valve, level controller, 8m2 heat exchanger , etc. which is to cooling each section of extruding barrel . Clean soft water is pumped in from the entry of water tank(the water hardness is less than 4～5°dh, advise to use the distilled water ). On water tank is mounted level display meter for checking the water level in it, additionally equipped with the temperature sensor, flow regulator, pressure relay for supervising the internal cooling water system, it will automatically alarm due to surpassing set temperature or lack of water. It saves maintenance time and ensure to resume production because of water supply by pump.

Soft water in water tank is transmitted to the upper, middle, lower heating zones of extruding barrel in 3 lines so that it can adjust the temperature of extruded lead, and its flow can be adjusted through valve according to the work state, and cooling water can be recycled for use after it is out of machine body and back to water tank.

External cooling water supply for the machine is filtered drink water, which is provided by users, and its flow is 5t/h, temperature is less than 25℃, pressure is 0.3Mpa. After being filter, the external cooling water enters into the plate type heat exchanger to exchange heat with internal recycling cooling water, in addition it goes through the gear oil cooler, rear cooling unit, water cooling jacket of die stock for cooling.