PVC Production Automatic Compounding System | Automatic Dosing & Mixing | Chenxing

What This System Is

A PVC production automatic compounding system is a fully automatic material preparation line that conveys, weighs, batches and mixes PVC resin, fillers and additives in one closed flow, feeding a stable dry blend to the extruder. The Chenxing system starts from jumbo bag debagging and raw material silos, meters the main materials and 3 to 10 additive components by weight, mixes them in an SRL-Z style hot and cold mixer group, then distributes the dry blend by screw or pipe-chain conveyor to one or several extrusion lines. Reference dosing accuracy is about ±0.1% to 0.2% at system level, and the reference capacity range runs from about 370 kg/h to 3000 kg/h across the published SRL-Z mixer sizes.

The system is built for plants that prepare their own compound instead of buying ready-made pellets. Once the recipe is stored in the PLC, the operator presses start and the line debags, stores, doses, weighs, mixes and delivers the dry blend without manual scooping or weighing. The main benefits are repeatable formulation, lower labor load, less powder dust in the workshop, and a material stream that matches the pace of the downstream PVC pipe extrusion line or profile line.

Key points of the system:

• Fully automatic material conveying, weighing, batching and mixing in one closed flow

• High precision weighing and batching, with reference system accuracy around ±0.1% to 0.2%

• PLC intelligent control with touch screen and stored recipes

• Closed dust free production environment around silos, weighing hoppers and mixers

• Capacity and plant layout designed for each project, confirmed at enquiry

For a general look at the same technology applied to other recipes, see the automatic compounding system page or the compounding system solution.

Specifications And Model Range

System Flow

The reference flow follows the order used by most PVC compounding plants:

1. Jumbo bag debagging and raw material silo storage

2. Main material weighing for PVC resin and CaCO3

3. Main material and additive dosing, with powder or liquid additive stations

4. Automatic mixing in a hot and cold mixer group

5. Dry blend storage and conveying to the extrusion area

6. Extrusion line feeding by screw loading or pipe-chain distribution

Each step can be adjusted to the plant layout. The complete flow diagram is normally drawn during the enquiry stage, because silo position, mixer room height and extrusion line distance change the pipe routing. We always confirm these points before quoting.

Basic Specifications

The values below are typical industry reference figures for this class of system. Exact ratings are confirmed at enquiry after the project parameters are fixed.

All figures above are typical industry reference values, confirmed at enquiry.

Reference SRL-Z Mixer Table

The hot and cold mixer group follows the widely used SRL-Z series layout. The table is published as a reference for sizing; actual selection is confirmed at enquiry.

All model names and figures in this table are typical industry reference values, confirmed at enquiry.

How The System Is Sized

Sizing starts from the extruder demand, not from the mixer table alone. If the plant runs two 65 mm PVC pipe lines and one profile line, the required dry blend per hour is calculated first, then a mixer group with enough margin is proposed, and the silo count follows from the daily batch plan and shift hours. We normally collect six inputs before sizing: raw material types, target capacity in kg/h, voltage, frequency and phase, plant layout and silo position, and the number of extrusion lines to be fed. The same logic applies to a PVC UV marble sheet making line or a board sheet extrusion line, where dry blend quality directly affects surface finish. The mixer group always keeps margin above the extruder demand so a normal hot and cold mixer cycle does not slow down the pipe extrusion line.

Where It Runs

The system prepares dry blend for any downstream process that needs a consistent PVC compound. Typical applications:

The same mixing unit also handles recycled powder when the recipe allows. Plants that combine compounding with downstream extrusion usually run one system feeding several lines; the dry blend distribution is arranged by screw loading or pipe-chain conveyor so each line receives the same material. The mixing unit page shows the mixer group in more detail, and the powder suction machine and continuous powder suction machine pages cover the material conveying options.

Customization Boundaries

What can be customized for a PVC compounding project:

• Production capacity and mixer group size

• Number and volume of raw material silos

• Number of additive components and their dosing stations

• Feeding method, screw feeder, vacuum transfer or pneumatic conveying

• Weighing hopper and batch weight range

• Plant layout and pipe routing between silos, mixers and extruders

• Interface with the existing extrusion lines, including how many lines are fed

• PLC recipe count and data interface, Ethernet or RS485

• Color marking and housekeeping details requested by the buyer

What stays fixed:

• The overall system flow, conveying, weighing, batching, mixing, storage and distribution

• The SRL-Z reference series and the published table above

• Power supply is customizable but always defined at project confirmation

Customization is discussed during the enquiry stage and written into the layout drawing before manufacture. This is why we ask for plant layout and silo position early. For related line-level solutions, see the profile extrusion line solution, the pipe extrusion line solution and the general solutions page.

Quality And Certification

Chenxing Machinery has built plastic machinery since 2002 and holds ISO9001 and CE certification. Each compounding system receives the following before shipment:

• Factory inspection of welding, alignment and load cell calibration

• Test run of the weighing and mixing sequence with the stored recipe

• Inspection report and certificate of conformity

• One year warranty on the complete system

• Installation supervision, commissioning and operator training on site

• Global installation service arranged per project

The load cells and the PLC package are factory calibrated before packing. We keep a copy of the calibration record with the machine documents so the buyer can verify the weighing performance after installation. More about the company history and workshop can be found on the about us page, and the product range overview is on the products page.

Delivery Terms

• MOQ: 1 set

• Lead time: confirmed on the order, normally based on the configuration

• Packing: export wooden case, with the control cabinet and mixer parts separately fixed inside

• Trade terms: FOB, EXW, CFR, CIF or CIP, selected by the buyer

• Payment: T/T or L/C at sight, discussed at quotation

The system is shipped in sub-assemblies, silos, mixer group, weighing frames, screw conveyors and control cabinet, so the packing list is long and every part is marked. Installation drawings and the packing list are provided with the shipment. For general delivery questions, the FAQ list covers the most common points, and the download page keeps the standard documents.

FAQ

What is a PVC production automatic compounding system?

A PVC production automatic compounding system is a closed material preparation line that conveys, weighs, batches and mixes PVC resin, fillers and additives automatically, then feeds a consistent dry blend to the extrusion line.

What does the automatic compounding system include?

It includes jumbo bag debagging, raw material silos, main material weighing, multi-component additive dosing, a hot and cold mixer group, dry blend storage and screw or pipe-chain distribution to the extruders.

What materials can the system handle?

It handles PVC resin, CaCO3, heat stabilizers, lubricants, impact modifiers, pigments and liquid additives, and can be arranged for recycled powder when the recipe allows.

What is the dosing and weighing accuracy?

Reference system accuracy is about ±0.1% to 0.2%, and small additive units up to 50 kg typically hold around ±20 g. These are typical industry reference values, confirmed at enquiry.

What capacity range is available?

The published SRL-Z reference sizes cover roughly 370 kg/h up to 3000 kg/h per mixer group, confirmed at enquiry after the extruder demand is defined.

How many additive components can be dosed?

A typical system meters 3 to 10 additive components, and large systems can be arranged for 8 to 16 dosing stations, confirmed at enquiry.

Can one system feed several extrusion lines?

Yes. After mixing, the dry blend can be distributed by screw loading or pipe-chain conveyor to one or several extrusion lines with the same material quality.

Is the production environment dust free?

The system is designed as a closed flow, with dust collection at debagging, silo vents and weighing hoppers, so the compounding area stays much cleaner than manual weighing.

What control system does it use?

A PLC with a touch screen stores 100+ recipes and supports Ethernet or RS485 data logging, confirmed at enquiry for the data interface.

What is the MOQ and lead time?

The MOQ is 1 set. Lead time depends on the configuration and is confirmed on the order.

Inquiry Entry

To prepare a quotation and a layout proposal, please send the following information together with the enquiry:

• Raw material types and typical recipe composition

• Target capacity in kg/h

• Voltage, frequency and phase

• Plant layout and silo position

• Number of extrusion lines to be fed

• Destination port and preferred trade term

Contact

Nicole | Email: ceo@cxsljx.com | Tel WhatsApp WeChat: +86 159 5118 7228