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Liquid Automatic Metering & Conveying System

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Product Description

Precision Liquid Dosing and Automated Delivery Solution for Plastic Extrusion, Compounding, Recycling, and Rubber Processing Industries

In modern plastic manufacturing, accurate liquid additive dosing directly affects product quality, production consistency, material costs, and operational efficiency. Whether processing plastic compounds, PVC formulations, cable materials, masterbatches, recycled plastics, rubber products, or specialty polymer blends, manufacturers increasingly require automated liquid metering systems that eliminate human error and ensure precise ingredient control.


The Liquid Automatic Metering & Conveying System developed by Zhangjiagang Chenxing Machinery Co., Ltd. is designed to provide highly accurate liquid dosing, automated conveying, and intelligent process control for oils, plasticizers, stabilizers, lubricants, colorants, coupling agents, and other liquid additives used throughout industrial production.


By integrating advanced flow metering technology, temperature compensation, density correction, automatic control valves, and intelligent PLC control, the system enables fully automated liquid feeding with excellent repeatability and long-term stability.


Chenxing Automatic Liquid Dosing and Transfer System for Plastic Processing Equipment
Precision Liquid Dosing Equipment for PVC Compounding and Recycling Plants
Liquid Automatic Metering and Conveying System for Plastic Extrusion Production Line



What Is a Liquid Automatic Metering & Conveying System?

A Liquid Automatic Metering & Conveying System is an intelligent industrial solution that automatically measures, controls, and transfers liquid materials from storage tanks to processing equipment according to predefined formulas and production requirements.


Unlike traditional manual weighing and pouring methods, this system automatically completes:

  • Liquid measurement

  • Batch dosing

  • Formula management

  • Automatic conveying

  • Flow monitoring

  • Temperature compensation

  • Production data recording

The result is a highly efficient, clean, safe, and repeatable production process.



Why Accurate Liquid Dosing Matters

Many manufacturers underestimate the impact of liquid additive precision.

Even a small dosing deviation can cause:

  • Product quality instability

  • Mechanical property variations

  • Surface defects

  • Increased raw material consumption

  • Formula inconsistency

  • Customer complaints

  • Production waste

For industries such as PVC extrusion, cable compounds, SPC flooring, WPC products, masterbatch production, and plastic recycling, maintaining accurate liquid dosing is critical for product consistency and profitability.

The Chenxing Liquid Metering System minimizes these risks through automated precision control.


Working Principle

The system consists of two major sections:

1. Liquid Metering Unit

The metering unit typically includes:

  • Flow transmitter

  • High-precision flow meter

  • Temperature sensor (Pt100)

  • Filter

  • Oil pump

  • Solenoid valves

  • Balance valves

  • Intelligent control instrument

The system continuously monitors liquid flow and automatically calculates the exact amount required.

2. Conveying Pipeline System

The conveying section includes:

  • Inlet pipeline

  • Outlet pipeline

  • Stainless steel fittings

  • Transfer pumps

  • Flexible connection assemblies

Once the required dosage is reached, the control system automatically stops liquid delivery and records the data.


Intelligent Temperature Compensation Technology

One of the biggest challenges in liquid metering is density variation caused by temperature fluctuations.

The Chenxing system utilizes:

  • Real-time temperature tracking

  • Density compensation algorithms

  • Flow correction technology

This ensures measurement accuracy remains stable even when ambient temperatures change significantly.

As a result, metering accuracy can be controlled within extremely tight tolerances.


Main Features of the Liquid Automatic Metering & Conveying System

High-Precision Metering

Advanced flow measurement technology ensures accurate dosing of liquid additives.

Benefits include:

  • Reduced formulation errors

  • Stable product quality

  • Lower raw material waste

  • Consistent production batches


Fully Automated Operation

Operators only need to enter the required dosage value.

The system automatically performs:

  • Valve control

  • Pump control

  • Flow monitoring

  • Quantity calculation

  • Batch completion

This significantly reduces labor dependency.


Formula Management Function

The system can store multiple production recipes.

Manufacturers can:

  • Switch formulations quickly

  • Reduce setup time

  • Improve production flexibility

  • Standardize production processes

This feature is especially valuable for companies producing multiple product grades.


Real-Time Monitoring

The intelligent control platform continuously monitors:

  • Flow rate

  • Liquid quantity

  • Temperature

  • System pressure

  • Equipment status

Operators can instantly detect abnormalities and optimize production performance.


Data Recording and Traceability

Production data can be stored automatically, including:

  • Batch quantity

  • Date and time

  • Formula information

  • Operator records

  • Consumption reports

This provides valuable production traceability for quality management systems.


Explosion-Proof Configuration Available

For flammable or hazardous liquid applications, the system can be customized with:

  • Explosion-proof motors

  • Explosion-proof electrical components

  • Safety monitoring systems

Meeting industrial safety requirements in specialized production environments.


Applications in Plastic Processing Industries

PVC Pipe Production

Automatically meters:

  • Plasticizers

  • Stabilizers

  • Lubricants

  • Processing aids

Ensuring stable pipe quality and improved extrusion efficiency.

SPC Flooring Production

Accurate liquid additive control helps maintain:

  • Dimensional stability

  • Surface quality

  • Mechanical performance

Across large production volumes.

WPC Composite Manufacturing

Provides precise dosing of:

  • Coupling agents

  • Lubricants

  • Additives

Improving composite consistency and product performance.

Plastic Recycling Plants

In recycling pelletizing lines, liquid additives are often required for:

  • Melt modification

  • Processing enhancement

  • Odor control

  • Stabilization

The automatic metering system ensures accurate additive consumption and reduces operating costs.

Cable Compound Production

Widely used for:

  • PVC cable compounds

  • XLPE compounds

  • Special polymer formulations

Where precise ingredient control is critical.


Advantages Compared with Manual Dosing

Item Manual Dosing Automatic Metering System
Accuracy Low High
Labor Requirement High Low
Production Consistency Variable Stable
Material Waste Higher Lower
Traceability Limited Complete
Formula Control Difficult Intelligent
Production Efficiency Moderate High



Why Choose Chenxing Machinery?

With over 20 years of manufacturing experience in plastic processing equipment, Chenxing Machinery provides complete material handling and dosing solutions for global customers.

Our advantages include:

  • Custom engineering support

  • PLC-based automation integration

  • Stainless steel construction options

  • International component brands

  • Turnkey project capability

  • Global technical support

  • OEM and customized solutions


We have successfully supplied equipment to customers in:

  • North America

  • South America

  • Europe

  • Middle East

  • Southeast Asia

  • Africa



Typical Materials Handled

The system can accurately meter and convey:

  • Plasticizers

  • Lubricants

  • Stabilizers

  • Silicone oils

  • Mineral oils

  • Processing oils

  • Liquid colorants

  • Chemical additives

  • Solvents

  • Coupling agents

  • Specialty liquid compounds

Customized solutions are available for specific liquids and viscosities.


Frequently Asked Questions (FAQ)

What is the accuracy of the Liquid Automatic Metering System?

The system utilizes advanced flow measurement and temperature compensation technologies to achieve highly precise liquid dosing suitable for industrial production requirements.


Can the system handle different liquid viscosities?

Yes. The system can be customized for low-viscosity oils, medium-viscosity additives, and special industrial liquids.


Is PLC control available?

Yes. PLC and HMI touchscreen control systems are available for intelligent operation, recipe management, and production monitoring.


Can the system be integrated into an existing production line?

Absolutely. The Liquid Automatic Metering & Conveying System can be integrated with extrusion lines, compounding systems, recycling lines, mixers, and batching systems.


Is explosion-proof design available?

Yes. Explosion-proof motors, sensors, electrical cabinets, and control systems can be configured according to customer requirements.

What industries commonly use this system?

The system is widely used in:

  • PVC processing

  • SPC flooring production

  • WPC manufacturing

  • Plastic compounding

  • Plastic recycling

  • Cable material production

  • Rubber processing

  • Chemical industries



Request a Customized Liquid Metering Solution

Looking for a reliable and accurate liquid dosing solution for your production line?

Chenxing Machinery can provide customized Liquid Automatic Metering & Conveying Systems tailored to your materials, formulations, capacity requirements, and factory layout.

Contact our engineering team today to discuss your project and receive a professional solution proposal.

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