Yql-200/5 Type Continuous Lead Extruding Machine

YQL-200/5 type Continuous Lead Extruding Machine

1. Application
This machine realizes continuous extruding through lead transporting by screw. Thickness of lead layer is adjustable, and it uses PLC full digital to control and display. Preset each part's temperature to control each part's temperature strictly, and make the rotation speed of DC motor constant. In this way, it ensures that the leading main machine works under the constant temperature, constant speed and constant pressure, then make sure the thickness of sheathing layer is even and continuous. Comparing to the intermittent type lead extruding machine, about 10% lead consumption can be saved.
As lead melts at a low point and is liable to oxidization, a sealed system is used for melting furnace, holding furnace and lead conveying pipe. So that reduces lead vapour diffusing greatly, and basically eliminate environment contamination.
2  Working Object
This machine is used to continuously extrude industrial pure lead or alloy lead (namely, Pb-Sb- Cu alloy). In addition, restricted by the construction and process technology of this equipment, alloy lead that contains more than 0.4% stibium can not be used for extrusion.
3  Technical Parameter
Core wire dia.                   φ65150mm
Final dia.                       φ70160mm
Screw rotation speed           213r/min
Max. extruding capacity        pure lead        16-33kg/min
                                 soft alloy lead  12-18kg/min
Linear speed              126m/min
Extruding main motor      Z4-200-31 DC motor  132kw1000r/min
Total heating power       320kw (18T melting furnace 145Kw  holding furnace  100kw)
Total power               500kw
Total water comsumption   7T/h (circulating water, actual water consumption is less than 7T )
Total occupied area      60m2
4. Composition
Mainly composed by the following:                
18T lead melting furnace                  
10T holding furnace
JQL-200/5 type extruding main machine            
Latter cooling system(water slot and spraying system.It is used to  cool the finished cable on line.)              
Water cooling system (main machine temperature control cooling)            
Lubrication system                    
Flowrate controller              
Ω type lead conveying pipe                    
Electric control system        
5 2500/4500 travelling type pay-off stand  
3150/5500 travelling type take-up and traversing stand
6  Features of components
Melting and holding furnace                                                  
Material is lead ingot. It goes into melting furnace to melt, then the molten lead goes into lead coveying pipe through hole on furnace base, then goes into holding furnace, be stirred in mixing chamber of holding furnace. In this way, it can make alloy element distribute more evenly. Via lead overflow tube, lead liquid is conveyed into lead conveying pipe which connecting with furance and main machine.
This lead melting furnace and holding furnace are heated by electricity. Total heating power is 247kw. Lead liquid temperature is about 375-385ºC.
Lead conveying pipe                                                            
Lead conveying pipe is used to connect lead conveying between lead melting furnace and main machine. When it is conveying lead, pipe temperature is 370~380ºC. When lead melting furnace and lead conveying pipe are heated, metallic lead conveying pipe will be expanded because of the heat, so the shape of the conveying pipe is designed to be Ω shape.
There equips a baffle heater on the lead conveying pipe. When in vocation or period of stopping production, temperature of lead conveying pipe should be always keeped at 290~300ºC. In this way, expanding and shrinking of pipes can be avoided, and it can also reduce oxide of lead liquid largely.
Main lead extruder
After lead liquid goes into machine body, through rotation of screw which is of special structure and be installed vertically, lead liquid is conveyed into die seat, then it is extruded out from lead pipe through die mouth.
Machine body is made up of extruding sleeve which is made up of double sleeves. There are heating and cooling devices outside. Heating adopts tube type heater. Cooling adopts purified water circulation to cool. Between screw and sleeve, there is abrasion proof bearing bush which is of special material. At the base of main machine, there is a water tank which is of 1500 liter content. In order to ensure the temperatures of cooling water and lubricating oil are constant, there equipped heat exchanger and water pump etc. The whole oil and water system device is installed on the base of the main machine.
Extruding main machine transmission and heating power 87KW.
Latter cooling system
It is mainly composed of water slot and spraying system. After extruding out from main machine, lead sheath's temperature is higher than 200ºC. Through water spraying, it is lower than 50ºC. Sprayed water is recovered into water slot, then can be recyclely used.
water cooling system
There are three groups of thru holes on the outside sleeve of the extruding barrel. When temperature of extruding barrel is higher than the set temperature, cooling water will make it cool through the three groups of the recycling thru holes (water cooling and heating should be started simultaneously ). Water flow is controlled separately by three flowrate controllers (active control), and this makes the up and down temperatures of extruding sleeve reach their set temperature separately.
Electrical controlling system
This system is specially designed for pay-off, melting and holding furanace, lead conveying pipe, lead extruding main machine, linkage of take-up, temperature displaying and controlling. This machine adopts imported original Siemense DC controller, man-machine interface touching screen and full-digital PLC to control.
Take-up and pay-off stand
4500 and 5500 travelling type take-up and pay-off stand is the auxiliary machine of the lead extruding machine. It is designed with tension control and speed following control, and realize linkage with the main machine.
2500/4500 travelling type pay-off stand          
Bobbin diameter:2500~4500mm
Bobbin width:1900~2800mm
Pay-off motor:Z4-11Kw
Pay-off speed:30m/min
Lifting motor:7.5Kw,AC motor with needle cycloidal reducer
Pinching motor:1.5Kw,AC motor with needle cycloidal reducer
Travel motor:2.2Kw,AC motor with needle cycloidal reducer
Load bearing: 40t
3150/5500 travelling type take-up and traversing stand            
Bobbin diameter:3150~5500
Bobbin width:1900~2800
Take-up motor:Z4-22Kw,DC motor  controller is Eurotherm brand
Take-up speed:30m/min
Traversing motor:3Kw,AC variable frequency motor with controller
Traversing pitch:digital input,automatically following up take-up speed
Lifting motor:  11kw, AC motor with needle cycloidal reducer
Pinching motor: 2.2kw, AC motor with needle cycloidal reducer
Load bearing:60t
Control mode: Siemens PLC+ Eurotherm 590 +dedicated control for take-up and traversing;
Control mode for basic function:
Take-up tension and speed adjustable, bobbin moves up and down, left and right, and quickly, bobbin clamping and release, take-up runs forward and backward, take-up tension can be preset, and traversing diameter of cable can be preset, torque take-up, with tension constant and adjustable; traversing pitch numerically preset and displayed, manual or automatic change of direction of traversing, working position calibration; stop for 3/4 rounds in case of change of direction, and adjustable.