• Volumetric Doser
  • Volumetric Doser

Volumetric Doser

A volumetric dosing system doses material according to the space it occupies i.e. its volume of the ingredients( such as: in cubic centimeter or meters,). Since the dosing system does not weigh the elements, it must be calibrated to ensure that the correct mass is dosed over a set period.

This means it must be recalibrated every time a new material or batch is introduced. Volumetric systems cannot automatically make adjustments for fluctuations in properties such as input material bulk density – and to play it safe, manufacturers tend to deliberately set the system to dispense a larger amount than is actually necessary.

Yushine volumetric doser suitable for all sizes of extruders and injection machines. It has three kinds of volumetric doser: single color unit, double color unit, and the three-color unit, which will be satisfied with your different requirements. The mixer is available for your selection.

  • Use brushless DC motor and free from maintenance.
  • Everlasting data memorizer and settings storage.
  • Microprocessor control, intelligent and accurate in the calculation.
  • External signals can be directly interfaced with the control box.
  • Dosing screws are chrome plated for durability.
  • Unit is comprised of standard modules for ease of cleaning, disassembly, and interchangeability.
  • Blender is a standard accessory for double color doser to make the material evenly mixed, while also an optional accessory for single color doser to do so.
Volumetric DoserGood Quality

Yushine volumetric doser suitable for all sizes of extruders and injection machines.It has three kinds of volumetric doser: single color unit, double color unit, and the three-color unit, which will be satisfied with your different requirements. The mixer is available for your selection.

We offer various models of these volumetric dosers all of which can be ordered online. For additional details, contact our team freely, as we’d be happy to help you.

Yushine is a professional manufacturer and supplier of volumetric dosers with over 15 years of experience 1-year warranty, Lifelong maintenance, and any feedback will respond in 24 hours. Yushine volumetric dosers should is 100% trial run and follows the quality control system strictly.

Send us your requirement, we will offer you a quotation as soon as possible.


  • The screw is chrome plated for durability.
  • Modular assembly structure, convenient disassembly, easy to clean and swap.
  • Monochrome masterbatch standard agitator to meet customer’s double compounding requirements.
  • The main hopper is marked with a two-color masterbatch, monochrome masterbatch optional.
  • Can meet the requirements of external signal input at the same time.
  • Record the existing operation mode, without affecting power outage, return to the government after the restoration of electricity.
  • There is a forced cleaning function, easy to replace the masterbatch.
  • Adopt WEG brushless DC motor, no maintenance.
  • Permanent memory and storage function with 50 sets of data.
  • Injection molding machine, extruder (sub-extension)can meet its signal input.
ModelMotor Power(kw)Dimension (mm) (H)X(W)X(D)Weight(KG)Blender Power(KW)Screw ExternalDia.(mm)Output Capacity(kg/hr)Storage Hopper(L)Gear RatioVolage


Yushine Leading Volumetric Doser Manufacturer

Yushine is the professional enterprise of the domestic brand in plastic & rubber auxiliary machinery fields volumetric Doser. We have many project cases with large-scale companies such as TTI, PHILIPS, Delonghi, Dorel Juvenile, and so on.

Since Yushine has over 15 years of experience in this industry. We assure you that all of our Volumetric Doser products are tested and certified in productions.

  • Yushine has passed the ISO9001 international quality system and most of our products have passed CE certification.
  • All the Volumetric Doser is an 18-month warranty, and any feedback will respond in 24 hours.
  • Strong abilities in developing and designing new machines that have passed patents for easy operating.
  • Short-time delivery and many products are in stock.
  • Yushine Concepts of “quality first, customers first, the credit first”.

Volumetric Doser – The Definitive FAQ Guide

Volumetric Doser FAQ guide is a concise, informative, and technical manual to answer your question: What is a volumetric doser? How does it work? How to use it properly? And much more.

The guide also contains troubleshooting tips to help you better understand each step of the process. This guide is your go-to choice while deciding to purchase your volumetric doser. Learn more below to find out more.

1. What is Volumetric Doser?

A volumetric doser is a dosage measuring device. It is used in the commercial industry that allows for accurate, repeatable, and consistent doses of the volume of plastic pellets or granules. It is responsible for the quality of the product.

Plastic pellets are solid materials that are often melted and injected into a mold to create plastic parts and products.

VoluVolumetric Dosermetric dosing dispensers in the plastic industry were initially developed to overcome the limitations of conventional, manual filling methods. However, volumetric dosing dispensers are one of the most commonly used dosage systems in a wide variety of industries.

It is commonly found in barrel mills, extrusion lines, injection molding machines, and much more. A volumetric doser can precisely measure the flow rate of dosing material in mass units per unit time, e.g., kilograms/hour or pounds/hour.

Volumetric dosing uses a digital microprocessor for the accurate calculation to dispense the material at a set rate, the maximum and minimum limits of which can be manually set.

2. What types of dosing dispensers do a volumetric doser use?

Dosing dispenser, as the name reflects, is a mechanical device designed to deliver an accurate volume of material. Several different types of dosing dispensers exist. Some of the main types are as follows:

Single Screw Type

The single screw type dosing dispenser uses a single screw mounted on a shaft for the transportation of material. It obtains its driving power through the motor. You can use a single screw type volumetric doser for free-flowing materials. Hence, they do not need a greater force and provide less friction during transportation.

Double Screw Type

The double screw type dosing dispenser utilizes a double screw mounted onto a shaft for effective material delivery. The motor plays an essential role in driving a double screw type dosing dispenser. This type of dispenser is widely efficient in delivering granular or powdered material. The dual screws overcome the friction force of these materials easily.

Triple Screw Type

This type of dosing dispenser uses three screws and delivers the more dense material at ease. The higher the viscosity, the greater the friction force associated with it and the more pressure it needs in dispensing. Pigments are the materials that utilize triple screw materials.

Piston Type

The piston dosing dispenser first utilizes suction to suck in the material necessary and then dispense it later. The volumetric piston dosing dispenser is designed to calibrate and dispense exact dosages of polymers, adhesives, lubricating liquids, and cleaning solutions in a reliable, easy, and very accurate way.

3. What is the need to calibrate your volumetric doser?

It is necessary to calibrate volumetric doser because the dosage must be accurate. The volumetric doser is very important in the plastic industry because it can accurately measure the number of materials, increase production efficiency, improve product quality, and reduce waste. By calibrating your volumetric doser, you will get an opportunity to create more products with lesser material.

Any imbalance in the settings may result in severe issues with the molding. Industries such as injection molding, blow molding industries, etc., require the volumetric doser to be calibrated to prevent overfilling and underfilling of the machines. As a result, volumetric calibration doser produces consistent volume in the given cycle time.

Volumetric Dosing Caliberation

Every time you change the mold or product dimensions you want to create, you need to calibrate your volumetric doser. This prevents errors and improves the overall quality control.

Without calibrating volumetric doser, it is quite difficult to calculate the exact consumption of stock materials or suddenly occurring shortage of material, which results in low efficiency of the production process and cost waste.

4. Does your company have an scm volumetric doser manual?

Yes, Yushine’s offers an scm volumetric doser manual. This manual will help you get started with scm volumetric doser. All the information you are striving to know about is in this manual presented in detail.

The details included a general description, structure characteristics, working principle, installation procedure, debugging, application and operation, troubleshooting, maintenance and repair, and much more.

This manual will guide you on how to operate this scm volumetric doser but also assist you in making a clear decision about the purchase of volumetric dosing.

You don’t need to buy a volumetric doser to get this manual. It is available for free online, with every information inside depicted clearly. The illustrations make it easy for you to understand the procedure of your volumetric doser functioning.

The user manual comes in an easy-to-print PDF format, a comprehensive reference section where you’ll be able to find fast answers on multiple aspects.

5. How to choose the right volumetric doser?

It would be best if you were careful while selecting your volumetric doser. Several parameters affect the choice of volumetric dosing. Some of the main parameters include:

Type of Material You Want To Dose

While selecting the right volumetric doser, the material used is also a consideration. The machine must handle the material that it is working with. You need to consider the viscosity of material while purchasing volumetric doser. Because it greatly impacts the dosing dispenser. The greater the viscosity greater will be the force required to dose.

Capacity of Dosing

The capacity of dosing affects the production efficiency. Make sure what dosing capacity is associated with your volumetric doser. The greater the dosing capacity per unit time, the greater the number of products you can manufacture. Hence it will increase your revenue.


The cost of a Volumetric Doser is directly proportional to the machine’s features, efficiency, and build quality. If the additional features associated with your volumetric doser increase, the efficiency also increases, leading to higher costs. So, make sure the volumetric doser you are purchasing is within your budget.

6. When should you use volumetric doser?

Volumetric dosing is used when a known and constant amount of material should be added to the process. Volumetric metering is easy and fast and consumes no time.

It would be best to use volumetric doser when handling granular products, powders, or products with higher viscosity. You can also use it when you are taking liquid products.

The main reason for using the volumetric doser is when you are fed up with traditional manual dosing. Conventional dosing methods are inaccurate and result in poor quality products with too much or too little material often dosed.

Volumetric dosing speeds up your production process. Manufacturers using volumetric dosing consistently report higher productivity and incredible quality products, which means you can be confident you’re getting the most out of your volumetric doser.

7. What is the difference between volumetric dosing and gravimetric dosing?

The difference between volumetric and gravimetric dosing and the benefits of each depends on the application you are using the dosed product.

Gravimetric dosing is done by weight, which involves a scale to weigh out or measure a product. This method requires less technique than volumetric dosing, as it’s all based on weight and measurements.

 Volumetric and Gravemetric

The volumetric dosing method measures the volume of material without being influenced by the ingredient’s weight, density, or size. The Volumetric Doser is used when it is desirable to mix a specific volume (weight/volume) of one or more ingredients in a constant amount.

Volumetric dosing is more accurate and repeatable than gravimetric dosing but requires sensors and flow meters to measure the stock material flow. Gravimetric Dosing–Gravimetric is a simpler and quicker means of measuring. This can be used with slower or less expensive scales.

8. What are the features of volumetric doser?

Multiple features associated with volumetric doser. Some of the main features are as follows:

  • The Brushless DC motor means no more maintenance. You can use this product for a long time.
  • Data storage and memorization that lasts forever. The power to save and recall data and settings is now at your fingertips with this volumetric doser.
  • Embedded with microprocessor for high tech, accurate and precise dosing material control.
  • The option exists to control the external signals and relate them directly to your control box.
  • The screws used in dosing comprise chromium plating. This will drastically add up to the amount durability of volumetric dosing.
  • The unit is modular. This means that pieces are easy to clean, take apart, and exchange with one another.
  • A magnet is placed at the bottom of the volumetric doser. If metal impurities are present in your volumetric doser, it will get removed instantly. This will improve the functioning of your volumetric doser screw.
  • You cannot ignore the importance of blender in your volumetric doser, and it plays a great role in uniform mixing either in single color or double color doser.
  • Hopper and floor stands come as an option to choose for your volumetric doser.

These features make volumetric doser a total solution accessory for your dosing needs.

9. Which industries make use of volumetric dosing?

Several industries utilize volumetric doser to streamline their production needs. Some of the major sectors are as follows:

Plastic Industry

Every industry has its need for a measuring instrument. While in the plastic manufacturing industry, volumetric doser is the answer for their demand. It helps control their material supply more effectively and makes their production process smooth and disciplined. It is used to dispense color concentrates in container and bulk form for most plastic manufacturing industries like PVC, Polycarbonate, PET, PC, Polyester, etc.


Pharmaceutical volumetric doser could be used for the liquid products, based on weight or volume of products, and flow controlled automatically from the main machine to connected devices, it’s widely applied in the medicine filling and powder packing. The volumetric dosing dispenses accurately, automatically, and efficiently the desired amount of powder, liquid, or granular material.

Food Industry

The role of volumetric doser in the food industry is to determine how much powder mix or granules should be put in a can, tube, or another container. You can use it for food ingredients as well as for chemicals. It saves time and money for manufacturers, distributors, and foodservice establishments by providing faster and more precise measuring ingredients for their products.

10. How does volumetric doser increase the effectiveness in molding or extrusion processes?

One of the biggest issues with traditional dosing methods is solids build up within screw elements, resulting in high product cost, downtime, and loss of productivity.

The size variations in the mold and extrusion machine allow for various capacities of bulk materials. As the material is pushed through each device, it fills a specified volume within the chambers.

The volumetric dosing processes iron oxide pigments are used to create red iron oxide (rust) for military vehicles, electronic circuit boards, and other applications.

Volumetric dosing is an essential machine in injection molding and extrusion. Volumetric doser was introduced to automate the material weighing operations to increase the effectiveness and efficiency in the molding and extrusion process.

By adjusting the hopper level, materials are measured and transported by the volumetric doser to the processing machine.

It is used in injection molding and extrusion processes to provide a precise quantity of plastic materials with stable quality to improve product quality and reduce cost.

Any mistakes along the way can waste time, resources, and money. Volumetric dosing can help you ensure your hard work comes out perfect every time.

11. What are the technical specifications of volumetric doser?

Several specifications are associated with volumetric doser. The specifications play a great role when you select volumetric doser. Some major specifications of volumetric doser are as follows:

ModelMotor PowerkwDimension (mm) (H) X (W) X (D)Weight


Blender PowerKW)Screw External Dia.


Output Capacitykg/hr.Storage HopperLGear RatioVoltage
SCM – 20 0.06520 × 610 × 335290.09203-601038 :1230 vac, 50 Hz, 1 ∅
SCM – 12 0.06520 × 610 × 335290.09120.1-101038:1230 vac, 50 Hz, 1 ∅
SCM – 16 0.06520 × 610 × 335290.09160.5-301038:1230 vac, 50 Hz, 1 ∅
SCM – 30 0.06520 × 610 × 335290.09308-1101038:1230 vac, 50 Hz, 1 ∅

The specifications for different models are listed above. You can choose one according to your capacity and size requirements. This will help you select the right fit for your volumetric doser.

12. How does blender play its role in volumetric doser?

Suppose a container contains a mixture containing granules having different sizes. In that case, the bigger granules may block the openings of nozzles in the volumetric doser, especially when the distances between nozzle and container bottom decreases.

This would result in a certain amount (or percentage) of outgoing granules being blocked by the mixture, therefore not reaching their target positions. The contents would not be uniformly mixed inside the container, and the required quality could not be controlled. This problem can be solved by using a suitable internal blender.

A blender is a piece of equipment used in a volumetric doser. A blender mixes homogenize, and deliver accurate dosing of powdery and granular materials in the production process. It helps to perform trapping and mixing functions. It can be combined with the volumetric doser or not. Normally, the blender is adjusted according to the mixing requirements by an operator in a volumetric doser.

13. What are the components of volumetric doser?

There are several components of volumetric dosing. Some major features include:

Dosing Screws

The role of a dosing screw is to control the flow of the slurry, which is used for transferring certain materials. There are different types of dosing screws available for the volumetric doser. It all depends on what specific function you want from your volumetric doser.


The hopper stores the dosing material. It is key to the proper functioning of a volumetric dosing machine. If the feeding system is above, the hopper above it collects bulk products. The exact holding capacity depends on the selected device. The hopper’s shape and size depend on the required output for a certain amount of time.

DC Motor

The DC motor is the heart of a volumetric doser. Its high performance, long life, and robust design (brushless) make it an integral part of the automation solution. Its ability to continuously and accurately dose product at a specified rate into the mixing vessel enables automation using volumetric dosing. The DC Motor is responsible for the accurate movement of dosing screws.

14. What precautions do you need to follow while operating your volumetric doser?

Multiple preventive measures are associated with your volumetric doser. Some of the main precautions are as follows:

Wearing safety goggles is recommended as a precaution to avoid any harmful liquid getting into your eyes.

Only operate the machine when all guards have been replaced, and no spills have occurred during operation.

When not in use, make sure that the surface of your machine is completely flat and free from dust or debris – this will ensure that nothing will come into contact with your product and affect the quality of your end product.

Before starting your doser for the first time, you should make sure that all hoses and fittings are dry. Do not use oils or grease to lubricate any parts of the machine.

To reduce the risk of injury and machine damage, read the user manual thoroughly before operating your volumetric doser.

It is very important to use the proper volumetric doser while using different materials and various output configurations. This will prevent you from poor-quality products.

15. How does a brushless DC motor increase the life of volumetric doser?

A Brushless DC volumetric doser motor is an advancement over the DC motor traditionally used in volumetric dosing pumps. Brushless DC motors use electronic commutation of the magnetic field to eliminate the brushes and significantly improve pump efficiency and durability.

Brushless DC Motor

But DC motors have complicated parts, like brushes and commutators, that wear out over time. This will make you take out your traditional motor and add commutator or carbon brushes. This will lead to downtime of your volumetric doser and result in decreased productivity. A Brushless DC motor spins the shaft at desired speed with minimum power loss. This will increase the life of your DC motor and needs no maintenance to perform the desired operation.

16. What makes Yushine’s volumetric doser standout?

There are several reasons which make yushine volumetric doser stand out. The main reasons are as follows:

Yushine offers you the volumetric doser at cheap cost and has a longer life span. This is because it uses high-quality materials from well-known suppliers or brands.

Yushine has spent a well-defined time in this industry and has experience of about fifteen years.

The warranty associated with yushine volumetric doser is about 18 months, and if you need any assistance, yushine will be happy to serve you instantly. The only thing you need to do is contact them.

If you order a volumetric doser from yushine, they provide you with instant delivery that will be beyond what you are expecting.

17. What are the benefits of volumetric doser?

Perfect for applications that require the uniform material flow of fine & coarse plastic power, such as injection molding, coating, and compounding operations.

The volumetric doser provides high injection accuracy and high production efficiency for small-scale and precision industries. This results in better parts quality at minimal cost increases vs. mechanical systems.

The compact construction is particularly well suited to this volumetric doser that offers you small space usability, as it leaves room for a maximum number of machines.

Volumetric dosing is used in the plastic industry for smooth material feeding with less vibration. The key mechanical unit

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