Plastometro ad estrusione Mflow

La versione base del plastometro ad estrusione Mflow viene utilizzata per determinare la velocità di flusso della massa (MFR). Il plastometro è caratterizzato da un design modulare; l’utilizzo del trasduttore del pistone amplia la funzione dello strumento includendo così la determinazione del melt volume flow rate (MVR) e la configurazione automatica del parametro adattivo. Tipici usi si trovano nel controllo di qualità e nell’accettazione merci.
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Vantaggi:

Vantaggi i & Caratteristiche

A precision piston transducer ensures accurate measurement of piston stroke when determining MVR. The contact point is very close to the piston, minimizing possible angle errors from the outset. The accuracy with which the flow rate is determined in Method B depends on the synchronization of the time-travel data pairs and on the accuracy of the time determination. As both measured quantities (time and travel) are available in digital form from the outset, there is no need for analog to digital conversion. This also eliminates synchronization errors. Quartz accurate time measurement also enables measurement of materials with high flow-rates.

Descrizione delle applicazioni

As the volume of testing increases, so does the need for a greater degree of automation (compared to Cflow). Mflow is capable of modular expansion and can be used to determine melt mass flow rate and melt volume flow rate.

  • The basic version of the Mflow extrusion plastometer is designed to perform MFR tests in accordance with Method A and can be upgraded for MVR tests as per Method B. Tests to the following standards are possible:
  • Methods A and B, ISO 1133
  • Methods A, B and C, ASTM D1238
  • ASTM D3364
  • JIS K 7210

You can optionally upgrade Mflow, for example by adding the pneumatic weight-lifting unit with or without cleaning function, or the weight selector.

Mflow can be operated in stand-alone mode via a modern touch display or on a PC with ZwickRoell testing software.

Pulizia

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.

Operating philosophy

The new standardized operating philosophy allows the operator to move easily between instrument and PC and always feel at home.

All test-related settings are grouped logically and are separated from higher-level system settings. The operator is guided through test configuration step by step. The saved test configuration can easily be exported and transferred to other instruments.

Integrated user management allows the operator's input options to be reduced to a minimum. Users see only what is important to them, allowing them to focus on the task at hand right from the start.

The MVR is shown "live" in graphic form in stand-alone mode and in the ZwickRoell testing software. This allows both melting process and behavior to be followed precisely during measurement.

Saving space when testing with multiple instruments

In labs with multiple instruments, testXpert III makes it possible to configure and control up to six Aflow and/or Mflow extrusion plastometers with one PC. Central operation and saving of results at a single workplace increases efficiency and affords a quick overview of all tests currently in progress. For a clear overview of operations, we recommend using two monitors.

The benefits of operating an extrusion plastometer with testXpert III are:

  • Automatic bubble detection that prevents measurement errors caused by air inclusions by detecting them in the plastic melt
  • Live display of the melt volume rate that follows the progress of melting and the behavior during measurement and graphically or numerically displays the test piston speed when the test starts in cm³ per 10 min. or in g per 10 min. when the melt density is preselected

Plastometro ad estrusione Mflow con selettore peso

L’opzione di selezione del peso Mflow unisce i vantaggi di un sollevamento pneumatico di pesi alla convenienza del semplice, sicuro e attendibile cambiamento dei pesi di prova, assicurando l’archiviazione sicura ed una sequenza di test di semplice gestione.

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Mflow extrusion plastometer in all models

The modular Mflow extrusion plastometer is used to determine the melt flow rate (MFR) and volume flow rate (MVR).

Informazioni aggiuntive relative il selettore dl peso

Unità pneumatica di sollevamento peso

  • Il plastometro Mflow può essere accessoriato con pesi di prova a seconda il tipo di plastica che si utilizza.
  • Per facilitare le operazioni di carico dei pesi all'operatore, questi possono essere sollevati e abbassati da un'unità di sollevamento pesi pneumatica senza necessità di sforzo fisico.
  • Il peso di prova può essere sollevato automaticamente dall'unità di sollevamento pesi quando è stata raggiunta la posizione di preriscaldamento.
  • Questo riduce al minimo qualsiasi flusso prematuro di plastica in granuli durante il preriscaldo.
  • Se si utilizzano pesi di prova con carichi di prova, ad esempio 2,16 kg, 5 kg, 10 kg o 21,6 kg, si raccomanda l'uso dell'unità di sollevamento pesi pneumatica o del selettore del peso.

Selettore del peso

  • Il selettore del peso contiene l'unità si sollevamento pesi pneumatica e i pesi di prova elencati sotto.
  • Se si cambiano spesso i pesi, si consiglia di utilizzare il selettore.
  • Il dispositivo di tenuta del pistone mantiene il pistone in una posizione liberamente definibile durante la fase di preriscaldamento.

Descrizione tecnica

La versione base del plastometro per estrusione Mflow è progettata per eseguire test MFR secondo il Metodo A e test MVR come da Metodo B. Sono possibili test secondo le seguenti norme: Metodo A e B ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Dati tecnici relativi a plastometro Mflow

Basic instruments

Type

Mflow extrusion plastometer (230 V)

Mflow extrusion plastometer (110 V)

Item No.

1043951

1043953

Test load

0.325 to 21.6

0.325 to 21.6

kg

Compressed air, oiled, dry (option for pneumatic weight-lifting unit)

6 to 10

6 to 10

bar

Dimensions

Height

510

510

mm

Width

360

360

mm

Depth

395

395

mm

Approx. weight

43

43

kg

Test temperature

+50 to +450

+50 to +450

°C

Display

capacitive touch display

capacitive touch display

Temperature display resolution

<0.1

<0.1

K

Number of storable parameter sets

>100

35

Interfaces

  • Ethernet port for connecting a PC
  • 2 x USB port for connecting a printer or USB stick
  • RS-232 port for raw data export, data output: serial number, specimen number, number of extrudates, thickness (user-specified), thickness at test temperature, total weight of extrudates, MFR average value, MVR average value, MFR and MVR individual values
  • RS232 port for connecting an analytical balance (from the ZwickRoell range)

Temperature accuracy in the range of 0 to 75 mm above the die in the temperature range of 50 °C to 450 °C

<0.3[1]

<0.3[1]

K

Time measurement

Error limit (Method A)

± 0.02 (with automatic extrudate cutter)

± 0.02 (with automatic extrudate cutter)

s

Error limit (Method B)

± 0.01

± 0.01

s

Travel measurement

Error limit (Method B)

±0.02 mm (ISO 1133) / ±0.4 % of 6.25 mm (ASTM D1238)

±0.02 mm (ISO 1133) / ±0.4 % of 6.25 mm (ASTM D1238)

Resolution

<0.005

<0.005

mm

Multi-instrument operation on one PC:

available main memory, min.

1.54

GB

clock rate

3

GHz

connected Mflow plastometers per PC

6

Multi-instrument operation on a single PC.

available main memory, min.

1.54

GB

clock rate

3

GHz

connected Mflow plastometers per PC

6

Included in delivery:

  • Ethernet cable
  • 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

100 to 127 V, 1L/PE/N

Power consumption (full load), approx.

0.6

0.6

kVA

Power frequency

50/60

50/60

Hz

  1. for distance and time, complies with ISO 1133-2

Accessori adatti

Pesi di carico

Test weights

Cflow and Mflow can be fitted with the following weights according to the plastic in use. They cannot be used for the pneumatic weight-lifting unit with selector.

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

weights with 5/10kg test loads (Item No. 001381)

001389

(ASTM D3364) 20

weights with 5/10/15/21.6 kg test loads (Item No. 001443)

008077

Barra di estrusione

Extrusion barrels (1 x required)

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

Inner diameter
[mm]

Drill hole

Properties

Item No.

Plastic, fluorine free

9.55

Finely honed

Wear resistant

087025

Plastic, containing fluorine

9.55

Finely honed

Resistant to acid

087028

Dispositivo di taglio

Dispositivo di taglio e terminale per orifizio

Il dispositivo di taglio è consigliato per intervalli di taglio maggiori a 1 minuto. Per intervalli di taglio brevi, per ottenere tagli in intervalli di tempo prestabiliti è consigliato l'uso del dispositivo di taglio. previene il deflusso prematuro del materiale quando vengono testati materiali plastici con elevato indice di flusso (> 10 cm3 / 10 min al carico 0.375 kg). Quando il terminale viene usato è necessario utilizzare anche un dispositivo di taglio automatico per l’apertura dello stesso ad inizio prova. 

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