Question

How to choose the right SGB gravimetric blender for plastic processing?

How to select the SCM volumetric masterbatch doser in the plastic processing industry?

Can the SPV-U proportional valve be connected to the SAL-1HP-UG loader without an independent control box to achieve multi-layer suction?

Which mixer is recommended for mixing ratios of 80%-90%, 10%-20%, 5%-10%, and 1%-5%?

Accepted Answer

Selecting the right SGB gravimetric blender depends on the types of plastic being processed, the hourly processing volume, and the mixing ratios of various materials. The maximum processing capacity of the gravimetric blender is calculated based on a bulk density of 0.8 kg/L. For mixing ratios between 0.5% and 5%, screw or micro-dosing valves are appropriate.

Accepted Answer

To select the SCM volumetric masterbatch doser, calculate the theoretical hourly output of the color masterbatch:

Theoretical Output (kg/hr) = Molding Machine Output (kg/hr) × Color Masterbatch Ratio Then, determine the actual output:
Actual Output (kg/hr) = (Theoretical Output (kg/hr) / Material Bulk Density) × 1.2 Based on these calculations, choose the appropriate SCM model volumetric doser. Consider the bulk density and pellet size of the color masterbatch to ensure maximum processing capacity and control accuracy.

Accepted Answer

The SPV-U proportional valve can operate in four different modes to achieve multi-layer material suction. However, each mode has specific minimum suction time requirements. The SAL-1HP-UG loader alone does not support multi-layer suction and requires the SPV-U control box to enable this functionality.

Accepted Answer

For these mixing ratios, the SGB-600-4-2R gravimetric blender with two sets of micro-dosing screw feeders is recommended, provided the materials used are in granular form.