Cflow extrusion plastometer

Cflow - the Compact One

The compact Cflow extrusion plastometers were designed as stand-alone instruments for rapid inspection of the melt mass flow rates (MFR). They are mainly used for incoming goods inspections by plastics processing companies, where extrusion tests are performed sporadically.

Advantages & Features

Advantages

Temperature control of the heating elements, heating chamber and barrel are all perfectly co-ordinated. The temperature is generated at the location where it is utilized, ensuring excellent temperature distribution over the whole barrel height from the outset.
Simplified cleaning, with rapid expulsion of residual specimen material.
- The die plug is located on the underside of the extrusion barrel. Removing the die plug frees the die to move downwards, allowing it to be removed easily.
- Expelling the die plus residual material after the test is similarly fast and easy. The barrel is now accessible throughout., simplifying cleaning.
The optionally available test weight support allows you to retain the test weight in the pre-heating position.
Comprehensive accessory range including automatic or manual extrudate cutter, separating pane and die plug is optionally available.

Applications

Cflow is a compact instrument for rapid checking of the melt mass flow rate of plastics as per Method A.

It is primarily designed for plastics processors with a less frequent need for extrusion tests and no requirement for connection to a PC.

Cflow is intended for MFR tests to Method A. Tests can be performed in accordance with the following standards:

Method A as per ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

The instrument can quickly be checked using the test granulate included in delivery. It is also possible to check the temperature in the extrusion barrel and the diameter of dies and barrels using plug gauges.

Cleaning

Simplified cleaning, with rapid expulsion of residual specimen material

The die plug is located on the underside of the extrusion barrel. Removing the die plug frees the die to move downwards, allowing it to be removed easily. Expelling the die plus residual material after the test is similarly quick and easy. Cleaning is simplified because the barrel is now accessible throughout. The Pneumatic Weight-lifting with Cleaning Function option also enables simple, convenient cleaning of the extrusion barrel at the touch of a button.

Technical Overview

The Cflow is designed for MFR tests to Method A. Tests can be performed to the following standards: Method A to ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Characteristics of the Cflow

Description	Value
Type	Cflow extrusion plastometer (230 V)
Item No.	004949
Test load	0.325 to 21.6	kg
Dimensions
Height with all weights	850	mm
Width	330	mm
Depth	395	mm
Approx. weight	18	kg
Test temperature	+120 to +400	°C
Display	two-line set/actual temperature display, backlit
Temperature display resolution	<0.1	K
Temperature accuracy between 0 and 75 mm above the die in temperature range 190°C to 300°C	<0.3¹	K
Error limit for time measurement (Method A)	± 0.02 (with automatic extrudate cutter)	s
Included in delivery:	test weights for load levels 325 g and 2.16 kg hopper cleaning accessories (cleaning piston, cleaning brush, cleaning pads (500x)) for barrel test granulate and filling chute for granulate
Power input specifications
Power supply	220 to 240 V, 1L/PE/N
Power consumption (full load), approx.	0.6	kVA
Power frequency	50/60	Hz

for distance and time, complies with ISO 1133-2

Depending on the plastic being used, the extrusion plastometer can be fitted with different test weights. 2.16 kg are included in the delivery of a basic instrument.

Test load [kg]	Required for this	Item No.
5	-	001380
5/10	-	001381
5/10/15/21.6	-	001443
1	-	001385
1.05	-	001386
1.2	-	001387
3.8	-	001459
12.5	Test weights with test loads 5/10 kg (Item No. 001381)	001389
(ASTM D3364) 20	Test weights with test load 5/10/15/21.6 kg (Item No. 001443)	008077

At least one extrusion barrel must be selected, in accordance with the materials to be tested. Various plastics (e.g. PTFE and PFA) which contain fluorine release hydrofluoric acid, which attacks the extrusion barrel material. For these plastics extrusion barrels made of a special steel alloy are used. These extrusion barrels have only limited suitability for filled plastics. For these the wear-resistant version is recommended.

Test material	Diameter, inner [mm]	Properties	Item No.
Plastic, not containing fluorine	9.55	Wear-resistant	001331
Plastic, containing fluorine / not containing fluorine	9.55	Acid-resistant	001345

The die plug prevents premature outflow of the material when plastics with high flow-rates (> 10 cm³/10 min at load 0.325 kg) are being tested. When the die plug is in use, an extrudate cutter is required in order to eject the die plug automatically when the test begins.

Description	ArticleNumber
Die plug
Die plug for testing plastics with high flow-rate; ceramic plug included¹	012728

Required: 1x extrudate cutter

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ISO 1133

Determination of the melt mass flow rate (MFR) and melt volume flow rate (MVR) of filled and unfilled thermoplastics to ISO 1133-1 and -2, ASTM D1238. and other similar standards.

to Melt flow index test

Plastics

For more than 60 years, ZwickRoell has been developing testing machines and instruments for tests on plastics and rubber. Generations of researchers, developers and specialists in quality assurance work successfully with test equipment from ZwickRoell.

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Downloads

Product brochure: Extrusion plastometers PDF 3 MB
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- EN
Product information: Cflow extrusion plastometer PDF 221 KB
- DE
- EN

Cflow Extrusion Plastometer

Advantages

Applications

Cleaning

Melt flow index test

Plastics