Brief introduction
GDE-30 is a laboratory single screw extruder which is special designed for dispersivity detection for compounds such as engineering plastics, modified plastics, color masterbatches. It’s used to detect the pressure balance before and after the filter screen during the melt’s extrusion in the screw, then help us to make the judgement for the compounds who has reach the requirement of dispersivity for plasticizing,coloring,filling,modifying or not, and reach the requirement of uniformity for forming or not.
Operation direction
(1).Put the filter screen(normally 180 or 320 mesh, depends on the diameter of filler and quality of color masterbatch )in the head of extruder.
(2).Start up the extruder and feed the compounds in.
(3). After the compounds went inside of the screw, melted, extruded forward and passed the filter screen, pressure parameters before and after the filter screen will be detected automatically.
(4).Read the pressure parameters and analyze the pressure balance before and after the filter screen then we can judge the dispersivity of compounds: the smaller of pressure balance, the better of dispersivity.
Configuration and specification
Diameter of screw : 30mm
RPM of screw : 0-120rpm, requency converter is used for speed adjusting.
L/D : 28:1(adjustable)
Material of screw : made of 38CrMoAlA, with nitrogen treatment, chrome plate treatment, polish and ultra-precision grinding
Material of barrel : made of 38CrMoAlA, with nitrogen treatment, chrome plate treatment, polish and ultra-precision grinding
Heating section : 3 section of barrels are heated by ceramic heaters, 2 section of die heads
Cooling device : 3 couples of air fans
Gear box : Hard tooth surface gearbox with the ratio is 18:1. tooth surface is precision ground with high torque and low noise.
Melt’s pressure : 0-35Mpa, precisely detect the pressure balance before and after the filter screen with high-sensitivity pressure sensor
Filter screen : Φ5-40um
Controller : PLC(Programmable and Logical Control) with Siemens touch screen and intelligent temperature control meter.
Motor power : 7.5kw
Electric source : 3x380V.50Hz
