Double Layers Co-Extrusion Stretch Film Machine

• Customization: Available
• After-sales Service: Forever
• Warranty: One Year
• Model NO.: BT-1250
• Type: Multi-Layer Co-extrusion Film Blowing Machine
• Raw Material: LLDPE
• Maximum Folding Width of Film: 500mm*2
• Screw Diameter: 75mm
• Automation: Automatic
• Computerized: Computerized
• Machine Weight: 8T
• Certification: CE, ISO9001:2008
• Trademark: SANBI
• Origin: China
• HS Code: 8477900000

Product Description

Main Technical Variables: 

Model	BT-1250
Diameter of Screw Stem	75*1  55*1
Major diameter ratio of screw Stem(L/D)	30:1(L/D)
Main motor power(KW)	22kw*1  15kw*1
Width of die head(mm)	1250
Width of finished products(mm)	500mm ×2
Thickness of finished products(mm)	0.017-0.05
Structure of film layers	A/B
Max. capacity	120kg
Machine weight	8T
Overall Dimensions (L*W*H)	6500*3500*3500mm

REQUIREMENTS:
 

1. Model-300 auto-loader 2 sets   
2. On-line wastage recycling machine 1 set
3.  The sub-machine adopts the home and abroad advanced "Swing" style to wind the film 1 set
4. Auto-cutting
5.  Auto-rewinding
6. Voltage to be 380V/50HZ/3 PHASE
7.  Main  motor    2sets 15kw/22kw
8. NS brand inverter 2sets 15kw/22kw
9. T-die Head: 1250mm    JINGCHENG    Brand(NO.1 CHINA BRAND)
10. Temperature Controller: AISET BRAND
11. Screw size: 55mm/75mm  famous Brand from Zhejiang
12.  Cooling & Rewinding Roller:    420mm DIAMETER
13. Gear box:#146/ #173/    JIANGSU Brand    2 PCS
14.  Net changer unit : Hydraulic  net changer 2 pcs

 

I.    Machine main specification
(1),Thickness of film:12µm-50µm;
(2),Tolerance of thickness:≤±5%;

1. ,Width of effective film:1000mm(max) or 2*500mm ;

(4) ,Structure of film layers: A/B Co-extruded;
(5)),Film material:LLDPE or LLDPE+LDPE;
(6). Electric power:  ≥40kw
(7).Electric power supply: 380V/50HZ/3 PHASE
(8).Machine dimension(about): 6500*3500*3500mm

II.. Composition
(1)Extruder unit      2 sets
(2)Auto-loaders    2sets
(3)T-die Unit      1set
(4)Cooling roller unit      2 pcs
(5)Pulling rollers      8pcs
(6))Auto cutting&rewinding
(7)Electrical control box      1 set
(8)Temperature control      1set
(9) Operating control system---PLC control
(10) On line recycling machine

A ,Gear box : Hardened tooth surface reducer. ,146#  ,1 Pieces,173# ,1 Pieces

(1)Gear  box processing  technique:  Tooth  surface  high-frequency  quenching,  hardened  toot h  surface precision  grinded by  gear  grinding  machine

B ,Barrel and screw.
(No. 1 - EXTRUSION SYSTEM

1. The screw diameter:  Φ55mm; Screw L/D:    30:1

(2)Screw length: 1650mm
3)Structure:Shield mixing forge
(4)Material: 38CrMoA1 ,Hard chrome-plated screw
(5)Processing technique: Forging, quenching, nitrating
(6)Inverter : NS BRAND
(7)  Motor : 15 kw      1 set
(8)Hopper : Autoloader
(9)55 Screw heating(Machine designed heating)      1.2kw

No 2 EXTRUDER SYSTEM
(1)The screw diameter: Φ75mm; Screw L/D:    30:1
(2)Screw    length: 2250mm
(3)Structure:Shield mixing forge
(4)Material: 38CrMoA1,Hard chrome-plated screw
(5)Processing technique: Forging, quenching, nitrating
(6)Inverter : NS BRAND
(7) Motor : 22 kw 1 set
(8)Hopper : Auto loader 1set
(9)75 Screw heating(Machine designed heating) 15kw

C. Heating:
(1)Heating:Stainless steel cover with socket connections.
(2)Heating Installed Power:>40kw
(3)Filter mode:Manual
(4)Cooling:water-cooling,
(5)Plasticization Cooling:Forced air cooling

D. Extrusion Die
(1)Die width:1250mm
(2)Mode of die : T shape made
(3)Process theory:Specially designed with different shunt
 
(4) Die head material and processing : Use 718 high-quality steel, after quenching and
tempering, grinding the inside surface of the polished mirror surface and hard chrome plating
treatment;
(5)The gap of mold mouth 0.8 mm
 
(6) Die heating(Machine designed heating) 18kw

E. Traction winder , Electric control,
(1)Traction roller: Seamless Steel Tube(Mirror-polished, hard chrome surface plating with
HRC 65)
(2)Cooling roller:420 mm diameter* 1300mm 2pcs: Special processing inside and outside the
mezzanine, spiral cooling in two flow way to ensure even cooling temperature for the surface of the
roller and have copper coupling with recycling system.
(3)Elevated cooling stretch:Oscillating, several aluminum rollers and rubber rollers
(3-1)Aluninium roller: 80*1200mm 6pcs
(3-2) Rubber roller: 90*1200mm 2pcs
(4)Machine desinged traction speed:20-100m/min
(5)Stretch film thickness:12µm-50µm;
(6)Cooling principle:Left to right into the universal joint barrel water cooling made of copper
(7)Changing cutting:Automatic Invisible serrated knife to cut off
(8)Cutting driver:Brake deceleration control of motor and steam-driven approach control.


(9)Rolling meters:Meters counter
(10) Oscillating is approx.100mm/min operated by auto motor.



F. Rewinding Device
 
(1)Coiling type: friction rewinder,controlled by cylinder.
(2)Rewinding roll:W-type Air shafts: two pieces with full automatic turnover exchange the roll
(2-1) Air shaft: 74*1250mm 2pcs
(3)Rewinding roller: 420mm * 1250mm 2pcs

G. Automatic edge material recycling unit and chiller
(1)On line recycling unit 1 set

H.Controlling box
(1) Separate electrical controlling box 1 set
(2) Separate temperature controlling box 1set