PVC Compound Production

Reliable Material Handling. Precise Formulation. Consistent Compound Quality

VOLDE develops complete raw material handling, dosing and process feeding systems for PVC compounding plants, covering the material flow from raw material intake and storage to dry blend preparation, extruder feeding and finished compound handling. PVC resin, calcium carbonate, stabilizers, modifiers, pigments, processing aids and liquid components are handled through dedicated conveying and dosing solutions according to their individual characteristics. The complete process is coordinated through PLC/SCADA automation, providing recipe-based production, repeatable batch preparation and production traceability for both PVC-U and PVC-P compound applications

| Raw Material Storage & Handling

PVC compounding combines materials with very different bulk densities, particle sizes and flow characteristics. PVC resin and calcium carbonate are generally handled in larger volumes, while additives, pigments and modifiers require smaller storage and feeding systems.

Depending on plant capacity and logistics, raw materials can be received from bulk tankers, big bags or bags and stored in silos, day bins or dedicated additive hoppers. Conveying technology, silo geometry and discharge equipment are selected individually for each material.

• PVC resin and calcium carbonate silos
• Bulk tanker unloading and silo filling
• Big bag discharge systems
• Bag dumping stations
• Intermediate and day bins
• Vacuum pneumatic conveying
• Pressure and dense phase conveying
• Screw conveyor transfer
• Flow-assist silo discharge systems
• Silo vent filtration and central dust collection
• Automatic material and conveying-line selection

| Major, Minor, Micro & Liquid Dosing

PVC compound formulations may include high-volume resin and mineral fillers together with small quantities of stabilizers, lubricants, impact modifiers, pigments and other processing additives. Each ingredient therefore requires a dosing method suited to its consumption rate, flow behavior and required weighing accuracy.

Main ingredients can be batch-weighed through central or vacuum weighing systems. Minor ingredients can be supplied from dedicated hoppers through volumetric or gravimetric feeders, while micro ingredients can be handled through automatic micro dosing or operator-guided manual weighing stations. Plasticizers and liquid additives are stored and dosed through dedicated liquid weighing systems according to the recipe sequence.

• Gravimetric weighing of PVC resin and fillers
• Automatic additive dosing
• Volumetric and gravimetric feeders
• Automatic micro dosing
• Manual micro weighing
• Pigment and modifier feeding
• Plasticizer and liquid additive dosing
• Rework weighing and return to process
• Target / actual weight monitoring
• Recipe-based ingredient selection

| Dry Blend Preparation & Extruder Feeding

Weighed PVC resin, fillers and additives are introduced into the hot/cold mixing process according to the production recipe. The resulting dry blend can be transferred directly to the compounding line or routed through intermediate silos and buffer bins depending on plant layout and production requirements.

Extruder feeding is engineered around the actual consumption of the compounding line. Depending on the process, dry blend can be supplied through batch, volumetric or gravimetric feeding systems. Where continuous mass-flow control is required, Loss-in-Weight feeders can be integrated directly with the extruder feeding arrangement.

• Automatic hot/cold mixer feeding
• Dry blend transfer
• Intermediate and buffer silos
• Volumetric extruder feeding
• Gravimetric Loss-in-Weight feeding
• Single- and twin-screw feeder configurations
• Automatic hopper level management
• Demand-based extruder feeding
• Mixer, feeder and extruder interlocks

| Pellet Handling, Packaging & Process Automation

After compounding and pelletizing, finished PVC granules can be transferred to intermediate storage or directly to packaging through pneumatic or mechanical conveying systems. Conveying velocity and transfer equipment are selected according to pellet characteristics and production capacity to limit unnecessary fines generation and product degradation.

Finished compound can be packed in open-mouth bags or big bags and integrated with downstream conveying and palletizing systems. The complete plant — from raw material intake to finished product handling — can be managed through a centralized PLC/SCADA system with recipe management, batch records and ERP/MES connectivity.

• Pellet conveying and intermediate storage
• Pneumatic or mechanical transfer
• Product screening and magnetic separation options
• 10–50 kg open-mouth bag filling
• Big bag filling
• Conveyor and palletizing integration
• PLC/SCADA process control
• Recipe and formulation management
• Batch tracking and traceability
• Raw material and lot tracking
• Consumption and production reporting
• ERP / MES integration

VOLDE integrates raw material storage, conveying, dosing, mixer feeding, extruder feeding and finished-product handling into a complete material handling infrastructure for PVC compounding plants.