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Product Description
An SPC floor production automatic compounding system is the fully automated batching, mixing and conveying line that prepares the PVC dry blend for SPC and PVC flooring extrusion, weighing PVC resin, a high calcium carbonate loading, stabilizers, processing aids, lubricants, impact modifiers, pigments and recycled material in one closed flow.
The Chenxing system runs from raw material storage silos and loading stations through main material weighing and additive micro dosing, a high speed heating mixer and cooling mixer, intermediate storage and pneumatic or screw conveying to the SPC extrusion line. Reference dosing accuracy is about ±0.1% to 0.2% at system level, and the published SRL-Z reference range covers about 370 kg/h to 3000 kg/h for a single mixer group.
SPC stands for stone plastic composite. The recipe carries a high share of calcium carbonate powder, which is heavy, while PVC resin powder is light. These two materials behave differently in silos, hoppers and conveying lines, so a floor compounding system separates them at the weighing stage. A heavy powder weighing hopper handles the stone powder, an additive micro dosing scale meters the small components, and the mixer blends everything into one uniform dry blend before the floor extrusion line takes over.
Key points of the system:
Fully automated weighing, mixing and conveying without manual scooping
High precision formulation with advanced metering sensors and stable recipe repeatability
PLC and industrial computer control with centralized monitoring and formula storage
Sealed conveying and central dust collection for a clean production environment
Optimized mixing blades and high speed mixers for even additive dispersion
Capacity and configuration customized to the SPC line output, confirmed at enquiry
The same equipment family is described on the general automatic compounding system page, and the compounding solution overview explains how the line is integrated with downstream extruders.
The process follows the typical SPC compounding sequence used in flooring plants:
Loading station and raw material storage silos, with vacuum loader transfer
Main material weighing, PVC resin and calcium carbonate in separate hoppers
Additive micro dosing, including stabilizers, lubricants, impact modifiers and pigments
Liquid additive feeding unit when the recipe uses liquid components
High speed heating mixer, where friction heat disperses the additives
Cooling mixer, which brings the blend down and prevents caking
Intermediate storage silos for the finished dry blend
Pneumatic conveying or screw loading to the SPC extrusion line
The flow diagram is drawn at the enquiry stage because silo height, mixer room position and extruder distance change the ducting and pipe routing. We confirm the layout before manufacture. Before the full line is built, small batches can be checked on a laboratory single screw extruder to confirm the dry blend behaves well in the screw.
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.
| Item | Reference value |
|---|---|
| System scope | Storage, weighing, micro dosing, mixing, intermediate storage and conveying |
| System weighing accuracy | About ±0.1% to 0.2% at system level |
| Silo volume | About 1000 to 5000 L per silo |
| Weighing hopper | About 500 to 1000 kg per batch |
| Batch weight | About 500 to 1500 kg per batch |
| Additive components | 3 to 10 typical, 8 to 16 on large systems |
| Small additive weighing | Up to 50 kg per unit, reference accuracy around ±20 g |
| Calcium carbonate loading | Reference filler share around 55% to 75% by weight for SPC recipes |
| Capacity range | About 370 kg/h to 3000 kg/h across published SRL-Z mixer sizes |
| Power supply | 380V 50Hz 3 phase, customizable at project confirmation |
| Structure | Carbon steel main frame, SS304 for material contact parts |
| Conveying methods | Vacuum conveying, pneumatic conveying or screw conveying, selected by recipe |
| Control | PLC plus touch screen or industrial computer, 100+ recipe storage, Ethernet/RS485 data logging |
All figures above are typical industry reference values, confirmed at enquiry.
The 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.
| Model | Total volume hot/cold (L) | Effective volume hot/cold (L) | Production capacity (kg/h) | Main shaft speed (rpm) | Motor power (kW) |
|---|---|---|---|---|---|
| SRL-Z200/500W | 200/500 | 150/320 | 370-400 | 490/980/70 | 30/42/7.5 |
| SRL-Z300/600W | 300/600 | 225/384 | 550-600 | 480/964/70 | 40/55/11 |
| SRL-Z500/1000W | 500/1000 | 375/660 | 800-1000 | 441/886/60 | 47/67/1.5 |
| SRL-Z800/2000W | 800/2000 | 560/1280 | 1300-1500 | 330/660/51 | 83/110/18.5 |
| SRL-Z800/2500W | 800/2500 | 560/1600 | 1300-1500 | 330/660/51 | 83/110/22 |
| SRL-Z1000/3500W | 1000/3500 | 750/2240 | 1800-2000 | 330/660/51 | 110/150/30 |
| SRL-Z800×2/4000W | 1600/4000 | 1120/2550 | 2600-3000 | 330/660/51 | 83/110×2/37 |
All model names and figures in this table are typical industry reference values, confirmed at enquiry.
Sizing starts from the floor line output. An SPC line with a wide board runs more dry blend per hour than a narrow profile line, so the mixer group must finish the hot and cold cycle within the same period the extruder consumes the previous batch. After the hourly demand is set, we choose the SRL-Z size, count the silos from the daily batch plan, and decide how many extrusion lines the system feeds. The sheet and board extrusion lines and profile extrusion line pages show the downstream equipment that consumes this dry blend.
The system prepares compound mainly for flooring, with the same line adaptable to related PVC sheet and panel production.
| Application | What the system prepares |
|---|---|
| SPC floor | Stone plastic composite dry blend with high calcium carbonate loading |
| PVC floor | PVC flooring compound with stabilizer, lubricant and color additives |
| PVC sheet | Sheet grade blend with controlled filler and impact modification |
| PVC panel | Wall and ceiling panel compounds with consistent color |
| Masterbatch feeding | Pigment and additive concentrates for downstream dosing |
The SPC extrusion line usually runs twin screw or cone twin screw extruders, which accept the dry blend directly from the intermediate silos. One compounding system can feed several floor lines when the conveying arrangement is planned together. The PVC pipe line solutions, soft PVC pipe extrusion and PVC shelf label strip lines pages describe related downstream lines that run on the same style of dry blend preparation.
What can be customized for an SPC flooring compounding project:
Production capacity and mixer group size
Number and volume of raw material silos
Heavy powder weighing hopper for calcium carbonate and main material weighing
Additive micro dosing stations and their count
Liquid additive feeding unit
Recycled material share in the formula
Conveying method, vacuum, pneumatic or screw
Intermediate storage silos for the finished dry blend
Number of SPC extrusion lines fed by the system
PLC recipe count and data interface, Ethernet or RS485
Plant layout and ducting routes between silos, mixers and extruders
What stays fixed:
The overall system flow, storage, weighing, dosing, mixing, storage and conveying
The SRL-Z reference series and the published table above
Power supply is customizable but always defined at project confirmation
Customization is written into the layout drawing before manufacture. Recycled material handling, for example, needs a separate intake point and sometimes a pre-drying step, so it is better to state the recycled share during the enquiry stage. Plants that run scrap alongside virgin resin usually combine the compounding line with recycling line solutions such as film recycling washing lines and PET bottle washing lines. For related material preparation and plant engineering, see the EPC project support and the plant solutions overview pages.
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, micro dosing 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 calibrated before packing, and the calibration record is shipped with the machine documents. For reference on the company background, see the company background page, and the full product range covers the other machines built in the same workshop.
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. Delivery and service questions are answered on the delivery and service questions page, and the document downloads page keeps the standard documents.
An SPC floor production automatic compounding system is the automated batching, mixing and conveying line that prepares the PVC dry blend for SPC and PVC flooring extrusion.
It handles PVC resin powder, calcium carbonate stone powder, stabilizers, processing aids, lubricants, impact modifiers, pigments and recycled material in one closed flow.
SPC recipes carry a high calcium carbonate share and several small additives, so manual weighing is slow and inconsistent. An automatic system keeps the formulation repeatable and lowers labor and dust exposure.
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.
The reference filler share for SPC recipes is about 55% to 75% by weight, and the heavy powder weighing hopper is sized for that loading, confirmed at enquiry.
Yes. Recycled material can be fed through a separate intake point and mixed into the dry blend when the recipe allows, with the share confirmed at enquiry.
The published SRL-Z reference sizes cover roughly 370 kg/h up to 3000 kg/h per mixer group, confirmed at enquiry after the floor line demand is defined.
The system uses vacuum conveying, pneumatic conveying or screw conveying depending on the material and recipe, confirmed at enquiry.
Yes. Sealed conveying and a central dust collection system keep the compounding area clean, reduce material loss and protect operators from powder dust.
The MOQ is 1 set. Lead time depends on the configuration and is confirmed on the order.
To prepare a quotation and a layout proposal, please send the following information together with the enquiry:
Formula composition and calcium carbonate share
Target capacity in kg/h
Voltage, frequency and phase
Plant layout and silo position
Number of SPC extrusion lines to be fed
Recycled material share, if any
Destination port and preferred trade term
Nicole | Email: ceo@cxsljx.com | Tel WhatsApp WeChat: +86 159 5118 7228
