Skin-foaming-skin Extrusion Extruer Line

Skin-foaming-skin Extrusion Extruer Line Video

Application of Skin-foaming-skin Extrusion Extruer Line

It is suitable for extrusion cat7,cat8 etc core wire.
 

Technology Parameter of Skin-foaming-skin Extrusion Extruer Line

Major Technical Specifications: 
1. Copper conductor inlet dia: max.2.6 mm or 3.0 mm. 
2. Copper conductor outlet dia: 0.4-0.9 mm (single-core cable drawing) 
3. Diameter deviation of copper conductor (Online laser measurement): ±0.001 mm deviation from the mean value).
4. Ovality of copper conductor (Online laser measurement): ±0.001 mm deviation from the mean value.
5. Elongation ratio of copper conductor: 18-28%. 
6. Insulation dia.: max.3.0 mm.
7. Insulation Type: 35-70% foamability for foaming  LDPE/MDPE/HDPE.  
8. Insulation Material:
8-1. Solid PE/PP;
8-2. PE foaming agent (premixed). 
The designated PE foaming brands include Dow & Union Carbide (Model: DGDK6923NT), Borealis (Model: HE4873),  Tianshui Wanwei (PE inner insulation), Dow & Union Carbide (Model: DFDA7540NT),  Ube Industries 180 (PE outer insulation), Dow & Union Carbide (Model: DGDK3364NT), and Wilson (Concentration of Color Masterbatch: 1:100; Maximum Foamability: 70% (at most 50% for PE data cable)  or 60% (at most 60% for PE miniature coaxial cable)). 
9．Line speed:
9-1. 800 – 1000m/min for foaming core;
9-2.1000 – 1200m/min for solid core PE.
10. Control parameters of insulation diameter:
10- 1.When the insulation outside diameter of the solid dielectic cable is less than 0.3 mm (based n online laser measurement), the deviation is controlled within ±0.006 mm from the mean value; when the insulation outside diameter is more than 0.3 mm, the deviation is controlled within 1% from the mean value. 
10-2. When the foaming insulation thickness is less than 0.3 mm (based on online laser measurement), the deviation is controlled within ±0.02 from the mean value. 
10-3. When the foaming insulation thickness is more than 0.3 mm (based on online laser measurement), the deviation is controlled within ±1% from the mean value.
11. For the solid core process, the mean capacitance deviation of the insulated core is controlled within ±1%:
11-1.As for the capacitance stability of the insulated core in the foaming process:
（PF/m）>200 PF/ m    ±1%
11-2.When the nominal capacitance is  more than 200 pF/M, the deviation is controlled within ±1%.  
（PF/m）<200 PF/m    <±2 PF/m
11-3. When the nominal capacitance is less than 200 pF/m, the deviation is controlled within <±2 PF/m.
12. Concentricity (Measurements are much preciser than calculations)
The concentricity is 95% or more for an insulation outside diameter of 1.5 mm.  
The concentricity computational formula (f) is 1-(e1-e2)/(e1+e2),
Wherein e1 means the maximum thickness and e2 means the minimum thickness.
When the nominal thickness (e) is 0.15, f is 0.9;
When the nominal thickness (e) is 0.25, f is 0.92;
When the nominal thickness (e) is 0.3 mm, f is 0.94; and
When the nominal thickness (e) is 0.5 mm, f is 0.95
13. Take-up reel size: 500×250 (drum width)×250 (inside width)×300 (outside width)×56 (shaft hole) (new dynamic balance reel for extruded products). 
14. Online control: Copper wire cable before extrusion
insulated core (measured with an X-Y double-axis laser diameter measuring instrument): 
15.Insulated core capacitance: Capacitance or outside diameter control system: 
16. Whole-line computer surveillance and control.
17. Total length of foaming line: Around 46 m (based on the direction of the foaming line).  
18. Total power of foaming line: Around 185 kW. 
19. Extrusion direction: From left to right of the consol.
 

Components of Skin-foaming-skin Extrusion Extruer Line

NO.	Item and Description	Quantity	Brand
1	ZL250-17 wire drawing machine (with  pay-off rack)	One set
2	TH800 annealer preheater (with steam generator and heat exchanger)	One set
3	35mm inner layer extruder	One set
4	60mm foaming extruder	One set
5	Automatic master batch machine (two hopper)	One set	China online
6	40mm outer layer extruder	One set
7	25mm strip extruder	One set
8	Three layer crosshead with color strip	One set	MICRODIA
9	High pressure nitrogen gas system	One set	MAXIMATOR
10	Warm water sink(length 4M, telescopic length:0.5m, with consistent temperature circulation system	One set
11	Cooling water sink(length 12m, with circulation system)	One set
12	Multi-pass capstan	One set
13	Filter and cooling device	One set
14	Drier	One set
15	DC sparker detector	One set	China online
16	Diameter gauge	One set	SIKORA
17	Eccentric gauge	One set	SIKORA
18	Capacitance gauge	One set	SIKORA
19	Full-automatic double bobbins take-up machine	One set
20	Electric control system	One set