◆Sufficient cooling capacity
◆ lower energy consumption
◆ Effective dispersion effect
◆Stable extrusion pressure
◆With first-order extrusion interlock protection
◆Perfect flow channel design
◆ Easy to adjust
◆The pressure drop is stable and uniform
Second-order extruder overview
The second-stage extruder is a single-screw extruder, which mainly functions to cool, further melt the material and mix the foaming agent. In order to make the foaming agent and the melt more fully mixed, the screw of the extruder is uniquely designed to be grooved or perforated on the screw groove of the extruder screw, so that the material conveyed forward through the screw It can be recirculated back and forth to achieve the effect of full mixing back and forth.
The cooling water flow path outside the barrel of the extruder plays a vital role as the extruder also acts as a cooling unit. The extruder adopts a spiral jacket to arrange the flow channel. The extruder barrel is divided into three cooling water circulation zones, each of which enters the water from the downstream of the extruder and discharges water downstream to achieve the cooling effect.
Technical parameters and indicators
◆Single screw extruder model is DS200
◆Drive system: motor 110KW, rated voltage 380V, rated frequency 50HZ, rated speed 980r/min, protection class IP54.
◆ Reduction gearbox: 420 hard tooth surface grinding gear, forced lubrication system, external cooling system for circulating water cooling, V-belt drive
◆Extrusion system: screw diameter 200mm, barrel material 40Cr, screw material 38CrMoALA, nitriding treatment, special mixed design
◆ Temperature control system: oil cooling, jacket cooling, 9 heating zones, heating power 99KW, 7 constant temperature zones, with compressor precision
Constant temperature, digital setting temperature controller
◆Control system: variable frequency control, PLC touch screen operation, over current protection, over voltage protection
◆Energy saving: 40mm thick mullite insulation, temperature resistance 1000°C
◆ Oil quantity controller, the cooling medium is heat transfer oil (320#), the cooling water dosage is 25l/min, and the temperature control range does not exceed 180°C.
|1||200# single screw||size||11850×1600×1650mm||quality||11.58T|
|1.1||Screw material||38CrMoALA double alloy|
|1.2||Length to diameter ratio||42.0|
|1.3||Heating/cooling||Oil temperature / 380V thermostat / 7 groups / 63Kw||0.17*7T=1.19T|
|1.4||Screw center cooling||Oil cooling / 380V oil temperature machine / 9Kw||0.017T|
|1.5||Oil cooling / 380V oil temperature machine / 9Kw||Ф170×600|
|1.6||Pressure display||Electronic sensor / mechanical pressure gauge|
|1.7||Auxiliary cooling||Fan / 220V / 7 groups / 3kw|
|1.8||Energy saving measures||40mm thick mullite insulation / 7 sets / stainless steel cover|
|1.9||Gearbox||420/hard teeth / 50:1|
|1.10||Power motor||110kw/380V/sixth grade|
|1.12||Foot cup (moving wheel)||Load capacity 1000 kg / group 8 groups|
|1.13||Load capacity 1000 kg / group 8 groups||0-25MPa|
1) Screen changer:
The screen changer between the two machines mainly filters the infusible materials and other impurities in the material when the recycled material is used. The screen changer adopts the method of non-stop screen changer, and four mesh sheets are arranged side by side. After the function of the hydraulic workstation, the mesh to be replaced is pushed out and the filter is replaced. The net block moves in one direction, and the whole is easy to take off and clean, and there is no black spot impurity in the movement. There are fixed preheating and exhausting mechanisms, and the material pressure and material flow are smoothly transitioned when changing the net, without stopping the machine, not breaking the membrane, continuously spinning, and not leaking.
1 technical parameters
◆Hydraulic oil drive:
◆Pre-network front post pressure sensor
◆Circular four-piece screen changer
◆Do not stop changing network
◆The pressure is stable
2) Static mixer:
In order to overcome the problem of insufficient mixing of different components in the production process, the unique structure of each mixing unit fixed in the pipe body by the static mixer is used to change the flow state of the molten material in the pipe body to achieve good between different components. Disperse and mix well.
1 technical parameters
◆Pipe static mixer DS200
◆Quantity: 2 units
◆Control form: oil temperature
◆Heating power: 9KW
◆Good mixing effect
◆Stable material temperature
◆Uniform flow channel pressure
The mold is the main component of the product molding, and the cavity of the plastic product mold whose molten material is obtained through the mold to obtain a section similar to the geometric section of the flow channel adopts a hanger shape design, and a melt flow which is as uniform as possible along the width of the lip can be obtained. Circulating heat transfer oil is provided under the lip membrane to ensure the stable temperature of the lip required for XPS sheet production. A heating rod is arranged around the cavity to ensure the temperature of the cavity, so that there is no dead material on both sides of the die exit. Thereby ensuring the qualified performance of XPS products.
– Ningxia Dingsheng Sunshine Environmental Protection Technology Co., Ltd. –
NINGXIA DINGSHENG YANGGUANG