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Twin Screw Extruder for Cable Compounding

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Description

The cable compounding could be divided into 3 parts below:

  • Silane XLPE cable compounding (two step and suitable for cable below 10kv)

  • Peroxide XLPE cable compounding (for cable 10-35kv)

  • HFFR (Halogen Free Flame Retardant) cable Compounding


1. Silane XLPE cable compounding (two step and suitable for cable below 10kv)

  • Basic formula for compound A:

  • 98% LLDPE/LDPE+GL+GM

  • Process: loss in weight feeding system-> high torque twin screw extruder-> water ring die face pelletizing

Parameters:

Model

Screw Diameter (mm)

L/D

Screw RPM

Main Motor KW

Torque Grade T/N3

Output kg/h

HT-63

62.4

32-68

300-900

110-315

12.3

350-1000

HT-72

71

32-68

300-900

160-450

11.8

600-2000

HT-85

81

32-68

300-900

220-630

11.2

800-2500

HT-95

93

32-68

300-900

355-900

11.8

1200-3000

Basic formula for compound B

95% LLDPE+antioxidant+GL

Process: standard twin screw extruder -> water cooling strand pelletizing


Parameters:

Model

Screw Diameter (mm)

L/D

Screw RPM

Main motor KW

Torque Grade T/N3

Capacity kg/h

SHJ-30

30

32-68

400/500/600

11

5.8

5-50

SHJ-36

35.6

32-68

500/600/700/800

15-18.5-22

5.7

20-80

SHJ-42

41.2

32-68

500/600/700/800

22-30-37

5.7

50-120

SHJ-50

50.5

32-68

500/600/700/800

37-45-55

5.8

80-200

Then mix 95% of compound A and 5% compound B material for the XLPE Cable extrusion


2. Peroxide XLPE cable compounding (for cable 10-35kv)

Basic formula:

LDPE+DPC+antioxidant

Process:

Loss in weight feeding system -> two stage extruder ->eccentric die face pelletizing

Note:

Final granules need to be dried.

Workshop must be air purification treatment.


Parameters:

Model

Twin-screw

Screw diameter (mm)

L/D

Main motor KW

Screw rpm

Output Kg/h

Single-screw

JY63/150

SHJ-63

62.4

32-68

55-75-90

500-800

200-500

SJ-150

150

7-20

37-45

60-86

JY63/180

HT-63

62.4

32-68

75-110

500-800

350-800

SJ-180

180

7-20

45-55

60-86

JY72/180

SHJ-72

71

32-68

200-280

500-800

400-800

SJ-180

180

7-20

45-55

60-86

JY72/200

HT-72

71

32-68

200-280

500-800

500-1200

SJ-200

200

7-20

55-75

60-86

JY92/200

SHJ-92

91

32-68

250-315

500-600

600-1200

SJ-200

200

7-20

55-75

60-86

JY92/250

HT-92

91

32-68

450-550

500-600

1500-2600


3. HFFR (Halogen Free Flame Retardant) Cable Compounding

Basic formula:

PE+ATH

Process:

Kneader -> conveyor -> conical twin screw feeder -> two stage extruder -> air cooling die face cutting


Parameters:

Model

Twin-screw

Screw diameter (mm)

L/D

Main motor KW

Screw rpm

Output Kg/h

Single-screw

JY63/150

SHJ-63

62.4

32-68

55-75-90

500-800

200-500

SJ-150

150

7-20

37-45

60-86

JY63/180

HT-63

62.4

32-68

75-110

500-800

350-800

SJ-180

180

7-20

45-55

60-86

JY72/180

SHJ-72

71

32-68

200-280

500-800

400-800

SJ-180

180

7-20

45-55

60-86

JY72/200

HT-72

71

32-68

200-280

500-800

500-1200

SJ-200

200

7-20

55-75

60-86

JY92/200

SHJ-92

91

32-68

250-315

500-600

600-1200

SJ-200

200

7-20

55-75

60-86

JY92/250

HT-92

91

32-68

450-550

500-600

1500-2600


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