Sector-Specific Solutions in Dosing Machine Selection

How do you find the most suitable dosing machine for your facility ?

 

The production dynamics, environmental conditions, and physical and chemical properties of the raw materials used in each industrial facility are completely different. Therefore, a general, 'standard' dosing machine cannot suit every sector. To find the most suitable solution for your facility, you need to thoroughly analyze your sector's mandatory regulations, material flowability behavior , and automation goals. Otherwise, you may encounter serious problems such as frequent machine malfunctions, clogging, or failure to pass regulatory inspections.

This article will delve into the dosing strategies, engineering requirements, and material selection criteria that need to be specifically designed for different industries, ranging from food and plastics extrusion to construction chemicals and heavy agricultural applications .

 

Precise and Hygienic Solutions for the Food and Pharmaceutical Industries.

 

 

In the food, supplement, milk powder, and pharmaceutical industries, hygiene is just as important as weighing accuracy when selecting a machine. It is a legal requirement that dosing devices used in these sectors fully comply with FDA (Food and Drug Administration) or GMP (Good Manufacturing Practices) standards. All internal and external surfaces that come into direct or indirect contact with the products must be made of corrosion-resistant SS304 or higher- segment SS316L stainless steel.

 

Dead Spots Legs ) Destruction

 

The design must absolutely avoid "dead spots," such as sharp edges, unground welding burrs, or inaccessible recesses where dust can accumulate and breed bacteria over time. The system must have CIP ( Clean -in- Place ) or quick -release mechanisms; the operator must be able to pull and wash the auger without using any tools. Furthermore, it is standard practice for the sealing gaskets used in the bunker to be made of tear-resistant blue food-grade silicone.

 

Industrial Sector	Critical Design Criteria	Recommended Metal/Alloy Material
Food, Spices & Medicines	Complete hygiene, easy to clean , no blind spots.	SS316L Stainless Steel, FDA approved gaskets.
Plastics and Masterbatch	Protection against static electricity, quick prescription change.	SS304 Stainless Steel, Antistatic and smooth finish.
Construction Chemicals & Cement	Superior resistance to extremely abrasive and dense materials (sand).	Hardox steel, tungsten carbide, or armor-coated thick coils.

 

Masterbatch , Regrind , and Additive Dosing in the Plastics Industry

 

 

In plastic injection molding machines, blow molding and extrusion lines, the accurate dosing of polymers, masterbatch (coloring agents), and liquid/solid additives is fundamental to production quality. The biggest problem in the plastics industry is the asymmetrical dimensions of raw materials. In particular, the bulk density of regrind materials recovered from product waste is very uneven and highly susceptible to clogging ( bridging ) in the bunker .

 

Yield Control Synchronized with Extruder Speed

 

For the plastics industry, vibrating feeders or micro-screw systems that ground static electricity are ideal. Furthermore, even a 1% deviation in the use of very expensive dyes like masterbatch can result in incredible annual costs. Therefore, gravimetric systems with PLC automation that work second-by -second in sync with the extruder's traction speed and can perform ' Yield Control' (grams per meter optimization) are crucial. Dosing stations should be preferred.

 

Agricultural Storage (TMO) and Construction Chemicals Industry

 

dosing systems are used in many areas, from the massive grain and cereal silos of the Turkish Grain Board (TMO) to construction chemical (cement, silica sand, grout) production facilities in heavy industry . For example, the biggest problem a 4C status industrial technician, actively working since 2023, might encounter in TMO silos is mechanical wear and the thermal loads created by continuously operating 3-phase motors. In agricultural facilities, massive volumetric screw conveyors are used because of the high capacity and wide tolerances.

 

The situation is even harsher with construction chemicals. Silica sand acts as abrasive, melting standard steel screw conveyors within weeks. Therefore, screw conveyor blades must be coated with tungsten carbide, and the body chassis must be welded from thick, heavy steel profiles that do not flex against the resonance created by powerful vibration motors.

 

Raw Material Type / Form	Flowability Characteristic​	Recommended Dosing Transfer Type
Granules (Plastic Polymer/Grain)	Free -flowing , easy to pour.	Standard single-screw volumetric or gravimetric helix
Fine Powder (Cement, Calcite, Flour)	It is prone to compression, forms bridges , and is sticky.	Twin -screw conveyor and internal mechanical mixing system.
Liquid Additives (Oil, Coloring)	Its viscosity (fluidity) changes depending on the temperature.	Gear pump, lobe pump or proportional valve assisted system.

 

Frequently Asked Questions

 

What specific certifications should be required when purchasing machinery for the food industry?

In addition to the device's CE certificate, material analysis certificates (EN 10204 3.1) for contacting stainless steel surfaces, FDA-compliant food-grade silicone/oil certificates, and GMP compliance declarations according to the facility's infrastructure must be required.

 

abrasive dusts (such as sand or calcite) immediately damage the dosing screw?

Yes, materials like silica sand can create a sandpaper- like effect, thinning and chipping standard ST37 steel over time. Therefore, specially hardened armor ( Hardox ) or tungsten coatings should be used in abrasive lines.

 

How can centralized automation be achieved in the grain, wheat, and feed industries?

Using PLC and SCADA systems, radar or capacitive level sensors , dosing bottom covers, and conveyor belt motors in the silos are synchronized second by second and managed from a central control room.

 

twin - screw dosing systems used?

It is used for the mechanical extraction and removal of difficult-to-manage powder products (such as titanium dioxide, cocoa) that have very poor fluidity, bridging and clumping together at the bunker outlet .

 

What should the standard cleaning time be for a dosing device?

clamp (V- band ) and modular designs, the technician should be able to safely remove the screw conveyor and clean it with compressed air or water without using tools, within a maximum of 5-10 minutes.

 

Are there differences in raw material and production costs between sectoral systems?

Absolutely. There are fundamental differences, which significantly increase the cost, between food-grade stainless steel devices with special internal/external polishing and IP69K wash-resistant sensors , and standard agricultural/cement grade carbon steel housings.

 

To understand the bridging effect and its causes , which is one of the most common flow problems in powder supply lines, we will examine Dosing. You can review our article on Bridging Problems and Solutions .

 

customized powder dosing systems for your factory and all the necessary technical information, please review our Dosing Systems product.