Laboratory Single screw Extruder can be integrated by main unit and single screw extrusion unit. That can be used to simulate real production process in the laboratory. Matched well with different die heads ,many functional simulation test in laboratory environment with Capillary Die,Pipe Die,Flat Die,Coating Wire Die and Other auxiliary equipments .The screw with different diameter, length-diameter radio and compress ratio can be chosen depending on the tested materials.
Single screw platform is consist of the Drive device, Feeding device, Barrel ,Screw and Dies parts, etc.The screw is the heart of the extruder, divided into the charging section (solid conveying zone), compression section(melting zone) and the homogenization section (the melt conveying zone) three parts.Put the material into the hopper ,under the action of a rotating screw,material was pushed on to direction of the nose.Material endures strong shear, mixing and calendering in the barrel,In this process, Meanwhile, the physical states of material the evolve from glass state to the high elastic state ,eventually become sticky flow pattern .
Simulate Production Realistically on a Laboratory Scale ,single screw measuring extruder serves for testing the extrudability of polymers and for studying thesis occurring in research and development as well as in practical application. The single screw extruder system allows a complete instrumentation of the extruders for the control and development of raw material. Different screws, die heads, and downstream equipment fulfill all kinds of extrusion tasks.
In the measuring extruder , the sample material is plastified under practice-oriented conditions and extruded through the die head. All measuring values such as torque, melt temperature, melt pressure are recorded continuously and represented in the form of tables and diagrams parallel to the current test. The extrudate is tested for various criteria:
• Uniform plastification, gloss, gels
• Color dispersion and color matching
• Transparency and formation of streaks, e.g. with transparent materials
• Swelling and contraction behaviour
• Segregation of individual recipe components of a compound at the die and/or at the screw`s tip
(e.g. titanium dioxide)
• Output per unit of time, etc.
Drive device
It is mainly used to complete the plastic plasticizing and transportation by uniform rotation for torque setting,Servo motor control screw torque, pre-set torque from touch-screen.
Feeding device
Material depend on its own gravity from the hopper into the screw barrel .According to the properties of material production and processing technology conditions, adjust the volume of feed speed and extrusion in order to achieve the balance.
Barrel
It contains materials and screw.
E = feed opening of the extruder
L1= feed section
L2= compression section
L3= metering section
L4= mixing section
Screws
For each measuring extruder, different screws are available.The screws are made of special steel, the flight basis and the lands are chromium-plated. Single- and multi- stage screws with various compression ratios and different lengths are available for testing a large range of materials.
a,It is suitable to extrude materials for example : PP PE PVC
b,It is suitable to extrude materials for example : PVC PP PE PC ABS etc.
c,It is suitable to extrude materials for example : HDPE LDPE etc.
d,It is suitable to extrude materials for example : PP PE PA PET etc.
e,It is suitable to extrude materials for example : PE PP PC PA etc.
f,It is suitable to extrude materials for example : PVC PP PE PC ABS etc.
g,It is suitable to extrude materials for example : PP PE PA ABS etc.
h,It is suitable to extrude materials for example : PA PC PBT PET etc.
i,It is suitable to extrude materials for example : PP AS PBT PE etc.
j,It is suitable to extrude materials for example : PP PE ABS PS etc.
Die
The Hapro die heads can easily be connected to the different extruders The die heads can be interchanged quickly and easily. They are heated electrically and have a separate control circuit. The die heads can be disassembled for cleaning. Various die heads are available for specific measuring tasks.
| Photograph |
Performance Index |
Performance Parameter |
| |
Screw L:D |
25:1 |
| Screw Diameter |
20 mm |
| Barrel Diameter |
50 mm |
| Compression Ratio |
2.4:1 |
| Screw material |
38 CrMoAlA |
| Temp control system |
RKC from Japan |
| Temp sensor |
J type thermocouple |
| Heating |
Electrical Heating/4 Zones |
| Heating power |
3.0 kW |
| Max. Temperature |
350ºC |
| Feeding speed |
Screw metering feed |
| Cooling |
Air Compression |
| Pressure range |
0~100 Mpa |
| Output |
Granular 0.8 -10 kg/ hour
Powder 0.45 -11 kg/ h |
Dies head
|
Slit die
(1.5mm deep x 60mm wide) |
Capillary Die
(1.5mm deep x 20mm wide x 160mm length) |
| Weight |
250 kg |
| Dimension (L×W×H) |
900×570×1250 mm |
RM-200C main unit and Single screw extrusion unit
Single screw extrusion unit
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