gravimetric feeder/ volumetric feeder

Short Description:

A gravimetric feeder is a self-calibrating dosing system that doses based on weight in speed.In gravimetric dosing, the weight of the dosed additive is measured using a load cell that is the foundation of the entire system. Weight is calculated using loss-in-weight technology, which measures the reduced weight while dosing. A volumetric feeder is relatively low priced dosing system. Accurate dosing cylinder. Stepper motor speed starting from 0.1 up to 200 rpm. A volumetric feeder, on the other hand, does this based on volume in speed.


Product Detail

Volumetric feeder
A volumetric feeder, on the other hand, does this based on volume in speed.
A volumetric feeder is a dosing system that supplies the production system with a certain volume of material in a set timeframe, based on the so-called displacement principle. In contrast to a gravimetric feeder, the dosing speed of a volumetric feeder should be selected manually, which may vary based on the nature of the raw input materials. For example, masterbatch requires a different speed compared to dosing of liquid or powder input material.
For smaller production processes and companies who are looking to save on dosing equipment, a volumetric feeder is favoured over a gravimetric feeder. Yet, a gravimetric feeder enables one to save heavily on the input material by a more precise feeding process. This means that a gravimetric feeding system usually provide for a higher return of investment (ROI) on a long-term basis.
Volumetric feeder

Advantages
Relatively low priced dosing system
Accurate dosing cylinder
Stepper motor speed starting from 0.1 up to 200 rpm
Disadvantages
Manual recalibration required
Limited control over your product quality
No monitoring and reporting options
Cannot automatically compensate for fluctuations in density
Sensitive to material build-up
No automatic detection of material supply interruption

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Gravimetric feeder
A gravimetric feeder is a self-calibrating dosing system that doses based on weight in speed.
In gravimetric dosing, the weight of the dosed additive is measured using a load cell that is the foundation of the entire system. Weight is calculated using loss-in-weight technology, which measures the reduced weight while dosing.
In the self-calibrating gravimetric feeder system, the stepper motor automatically alters its speed when a change is detected in the material flow. This eliminates the need for manual adjustment, which is required when using a volumetric feeder. Such a change in material flow can be the result of the addition of new material or fluctuations in the material density, among other factors. This means that, when using a gravimetric feeder to dose, you are in complete control of the quality of your final product. Thanks to the gravimetric feeder's self-calibrating dosing system, you will never run the risk of overdosing and will therefore automatically save costs when using expensive additives.
Gravimetric feeder
Advantages
Self-adjusting / self-calibrating
100% control over your product quality
Easy to operate
Monitoring and reporting options
Higher saving on expensive additives
Fluctuations in density do not effect outcome
In-sensitive to material build-up
Automatic detection of material supply interruption
Accurate dosing cylinder
Stepper motor speed starting from 0.1 up to 200 rpm
Disadvantages
Relatively more expensive than a volumetric feeder, but short ROI.

 

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    Biodegradable Corn Starch Twin Screw Extruder Machine PLA Pellet Plastic Making Machine
    The barrel of  Twin Screw Extruder can be opened in minutes. This makes product changeover, maintenance and research fast and easy. Both screws and barrels are designed using the building block principle. The screw configuration, barrel setup, feeding and venting, screen changing, way of pelletizing and process requirements, in consideration of the machine’s versatility in other general applications.

    Application of the Twin Screw Extruder:

    • Various plastic inorganic filler, polymer blending (plastic alloy), plastic coloring, ect
    • Various engineering plastic reinforcement of glass fiber, flame-retartant pellets
    • Various antibacterial, insulated, toughening materials for specific uses
    • Light/biology degradable film materials, amylum degradable plastics and multi-functional anti-fog film materials, etc.
    • Specific material for automobiles and household appliance and cable materials, etc
    • Themoplastic elastomers, such as TPR, TPE, and SBS, etc
    • Regenerate pellets for PVC airproof pieces, thermo-soluble glue, etc
    Model
    PSHJ-20
    PSHJ-35
    PSHJ-50
    PSHJ-65
    PSHJ-75
    PSHJ-127
    Screw Diameter:
    MM
    21.7
    35.6
    50.5
    62.4
    71
    126
    Central Distance
    18
    30
    42
    52
    60
    102
    Length Diameter Ratio
    28-52
    28-52
    28-52
    28-52
    28-52
    28-52
    Main Motor Power
    4-5.5
    22-45
    75-110
    110-185
    160-280
    90-160
    Max.Screw Speed:
    RPM
    600
    600
    600
    600
    600
    600
    Output Torque per Shaft:N.m
    32-43
    175-358
    597-875
    875-1472
    1273-2228
    850-1528
    Reference Output: KG/HOUR
    5-20
    20-80
    80-200
    150-350
    300-600
    800-1500

     

    Max.Screw Speed:
    RPM
    800
    800
    800
    800
    500
    Model
    C-PSHJ-35
    C-PSHJ-50
    C-PSHJ-65
    C-PSHJ-75
    C-PSHJ-127
    Screw Diameter:
    MM
    35.6
    50.5
    62.4
    71
    126
    Central Distance
    30
    42
    52
    60
    102
    Length Diameter Ratio
    28-52
    28-52
    28-52
    28-52
    13-18
    Main Motor Power
    22-45
    75-132
    110-250
    160-355
    90-160
    Output Torque per Shaft:N.m
    131-269
    448-788
    657-1492
    955-2119
    850-1528
    Reference Output: KG/HOUR
    150-300
    200-500
    400-800
    500-100
    800-1500

    Application-1

    Application

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