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SP65/150

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SP65/150

Introduction

1.Application:Soft PVC

2.Output: around 500kg/h, according to raw materials , formulas, and processing conditions ;

3.Double stage extruder: SP65/150;

4.Extruding&Pelletizing Flow Scheme

Pre-mixing system>>> Twin screw extruder>>>Single screw extruder>>>Air cooling hot face pelletizing line >>> conveying system >>> Vibration>>> Storing system

Technical Parameters

 

  Pre-mxing System

1. Stage mixer: heat mixing ;

Power: 40kw;

Heating system:electric heater; heating power:11kw;

Rotation speed of blade:475/950 rpm

Volume: 300L; unload: pneumatic mode;

2.Stage mixer: cool mixing;

Cooling system: water cooling shaft;

Power: 55kw;

Volume: 600L;

Unload::pneumatic mode;

 

 

  Double Stage Extruder: SP65/150

1.Main Feeder：

Feeding method: Metering twin screw feeding;

Feeding motor: 1.5kw

Speed controller: ABB inverter; Stirring Paddle inside the hopper;

 

2.Vertical Feeder：

Feeding method: single screw;

Motor power:1.5kw;

Material of screw: 45# steel

 

  Twin Screw Extruder :TSE-65

1.Main Motor：

AC motor power: AC 75KW ; WN Brand;

Speed regulated: ABB inverter;

Cooling method:Fan mounted on the end of motor;

Protection class: IP54

 

 

2.Power transmission：

Coupling connect

 

  

 

3.Gearbox:

The gearbox reduces the motor speed to the speed of the screw shafts and distributes it to the two output shafts, reduction ratio: 2.5:1 ;

The gearbox consists of:

Involute gear teeth couplings between the output shafts and screw shafts

Integrated thrust bearing assembly, radial bearings ofthe output axis are NSK Bottom part of casing designed as oil sump

With lubrication oil cooling system; equipped with plate-typed stainless- steel condenser.

 

 

4.Screw Elements:

The inter meshing screws co-rotate and wipe each other with narrow clearance so that no residues are left in the screw flights and cleaning effort is thus reduced.

Screw Direction: Co- rotation ;

Screw Diameter: 62.4mm; L/D= 32:1 ;

Max Screw speed:500 rpm ;

Screw combination: modular structure, torque transmission by spline; adjustable according to different materials ;

Material of screw: 38 CrMoAlA;

Nitrified depth of screw: 04-0.6mm;

Structure feature: modular fixed on shafts;

Material of shafts:high performance alloy steels ,40CrNiMoA withstanding high load,etc.

 

 

5.Barrel:

The flexible modular principle is realized with screw barrel sections from the wide range of different designs possible. Fast, intensive and uniform heating of the screw barrel sections is ensured by electrical heaters. The barrel sections are cooled with water.

Length: 210mm each; totally 8 sets;

Material: 38 CrMoAlA;

Total length of barrels: 1680mm;

Barrel structure: Modular structure, connected together by bolts and pins;

Barrels configuration:

 

Note: the 1th barrel : feeding port ; connector: connecting with vacuum system and single screw extruder;

 

 

 

6.Temperature Controlling System:

Heating system: Electrical heating,

Cooling system: Soft water cooling ;

Cooling pipe: copper;

Soft water cooling: 0.55kw water cooling pump; stainless steel water tank; condenser,

Solenoid valves: Danfoss ;water pressure indicator;

Temperature control: RKC

 

 

  Single Screw Extruder: SJ-150

 

1.Main Motor:

AC 55kw ; WN brand ;

Speed regulated: ABB inverter;

Cooling method:Fan mounted on the end of motor;

 

2.Gearbox:

Hard tooth gear box; with the lubricating system ;

 

3.Screw Elements:

Screw Diameter: 150mm; L/D= 9:1 ;

Screw materials: 38CrMoAlA; nitride steel; Nitride hardness is HV800-900. Nitriding Depth is 0.4-0.7mm;

Speed: <85 rpm;

Screw shaft: with water cooling inside the core of shaft;

 

  

 

4.Barrel:

Barrel materials: 38CrMoALA; nitride steel ;Nitride hardness is HV800-900. Nitriding Depth is 0.4-0.7mm;

Barrel configuration:

 

 

5.Temperature Controlling System:

Heating system:electrical heating ;

Cooling system: Air cooling

 

 

 

6.Vacuum System:

Vacuum pump:1.5 kw ; water- ring ; connected with vacuum tank;

 

 

 

 

7.Air Cooling Hot Face Cutting Pelletizing Line:

Die head &Screen changer

Hot cutting Die head

The die head, directly connected to the screen changer;

Heating way: electrical heating;

Material: nitrided steel;

Measuring point: one sensor for measuring melt temperature;

Measuring point: one sensor for measuring melt pressure;

 

 

8.Hydraulic Screen Changer:

Good plasticizing performance; stable production performance; Easy to change filter;

 

 

 

 

9.Air Cooling Pelletizer:

Motor power: 1.5 kw ;

The thermal cutting cover: stainless steel ;

Visualization widow, with water cooling sheath ; Movable;

 

 

10.Cooling System& Conveying System:

10.1 Cooling system

Cyclone separators: two sets; Diameter:860

The first Cyclone and pipes: with water cooling sheath;

Materials: stainless steel ;

Conveying system

Conveying fans: 2 sets; 3kw ;

Several pipes: stainless steel ;

10.2 Vibrator

Screen layers: 2; length: 3 m ;

With cooling fans ;

10.3 Conveying& Storing system

Conveying fans: 3kw x1 ; Pipe materials: stainless steel;

Silo Volume: 1 m3;

Silo Materials: stainless steel ;

 

 

11. Vibrator:

Number of screen layers: 2; Length: 3 meters;

Includes cooling fan;

 

 

 Electrical Control Cabinet

 

Essential components as per machine specification :

Max.ambient temperature :40℃.

Measuring with digital display for

-- motor speed

-- motor current

-- melt temperature

-- melt pressure

-- die head temperature

-- zones temperature control

Power supply : 380v 3 phase/N/PE 50 Hz ( any different,please inform me )

Variable speed drive for main motor

Temperature control by the temperature controller from Japanese RKC Main relays, Contactor, switches are SCHNEIDER brand; CE mark;

Each motor run/stop is controlled by button from Schneider product , CE mark;

The control cabinet : according to CE standard;

The electrical control system consists of :temperature control system,drive system,and interlocking control system.

The display of values consists of:

▪ PV ( Present value ); SV ( set value ) of temperature of each zone

▪ PV and SV of main motor speed

▪ PV and SV of melt pressure

Automatic alarm and fault display function

▪ Over load

▪ Speed adjuster fault ( phase missing, voltage insufficient)

▪ Over voltage

Interlocking and protections

Twin screw extruder is interlocked with single screw extruder and pelletizing line

Twin screw extruder is interlocked with the oil pump of the gearbox for protection;the twin screw main machine can not start before the start of the oil pump

Protection of over current, voltage insufficient ;

This whole system is safety and easier to operate

 

Engineering Cases

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