Compound

Plastic Pelletizing Line & Compounding Solutions

Liansu Mconvey offers flexible cooperation modes ranging from single machines to turnkey projects, covering the entire line configuration of debagging, storage, metering/mixing, extrusion, pelletizing, and packaging.Solutions can also be customized on demand ó from recycling pelletizing to compounding pelletizing, and from pre-mixing to integrated continuous production with loss-in-weight feeders ó all delivered as a one-stop compound pelletizing solution.

Applications of Our Plastic Pelletizing Lines:

Industrial Recycling Pelletizing: Film, Flakes, regrind
Filled & Blended Pelletizing: Mineral filling, flame-retardant materials, alloy materials, thermoplastic elastomers (TPE)
Fiber Reinforced Pelletizing: Glass fiber reinforced, carbon fiber reinforced
Masterbatch Pelletizing: Functional masterbatch (flame retardant, anti-static, anti-aging), high-filling masterbatch, color masterbatch (black, white, color)
PVC Compound Pelletizing: Pipe, profile, medical, cable

Integrated Systems of a Turn-Key Pelletizing Line

Raw Material Receiving & Debagging Station (manual / automatic, bulk bag / 25kgbag)
Automatic Weighing & Dosing (formula weigher, loss-in-weight feeder: powder / granule / liquid)
Mixer (high-speed, ribbon, coulter)
Twin-Screw Extruder
Pelletizing System (underwater, water ring, water-cooled spaghetti, air-cooled die-face)
Pellet Conveying & Packaging (25kg / bulk bag packaging)

Co-Rotating Twin-Screw Extruder for plastic pelletizing line

Dosing & Mixing

Loss-in-weight feeders （continuous feeding）

Loss-in-weight feeder （for powder）, which can be used for various powder materials, especially the materials with poor fluidity, and has excellent bridging performance.
Loss-in-weight feeder （for granular）, which has two series of free fall and screw feeding and can be combined into various forms to flexibly meet various needs.
Loss-in-weight feeder （for Liquid）, using magnetic pump for accurate and continuous dosing, with stable outlet pressure difference, no pulsation, and low noise.
The whole series of loss-in-weight feeders can be equipped with mobile phone APP service.

Formula Weigher

Scope: Powder formula weigher, Gravimetric blender

Powder formula weigher adopts the combination of loss-in-weight + gain-in-weight, can ensure the output and the dosing accuracy of trace raw materials. At the same time, there are offline, offline multi-station and online types.
Gravimetric blender is suitable for all kinds of granules, even irregular granules, can also be easily dealt with, and can also accurately dose and efficiently mix high-temperature materials.

Mixer （batch feeding）

Scope: High-speed mixer, Ribbon & horizontal coulter mixer

High-speed mixer adopts ultra-high-efficiency permanent magnet synchronous motor with special working mode for mixer, ultra-wear-resistant blade with sintered surface hardening, and combined with bearing group that can bear large radial and axial loads, the production capacity is increased by 50%, and energy saving exceeds 20%.
Ribbon & horizontal coulter mixer, the blade is simulated and designed so that various materials can be fully mixed in the mixing chamber.

Twin-Screw Extruder for Compounding & Pelletizing

Co-Rotating Parallel Twin Screw Extruder

Designed for compounding, reinforcement, filling, alloying, masterbatch production, and other pelletizing applications.
Drive System: Customized ultra-high efficiency permanent magnet synchronous servo motor ó energy-efficient and fast-response.
Safety Protection: German-brand torque limiter, linked with the servo motor for rapid overload response, protecting the screws and gearbox.
Gearbox: High-specific-torque design, high output, low shear rate, suitable for stable processing of heat-sensitive materials. Optional predictive maintenance vibration monitoring to reduce maintenance costs.
Screw Mandrels: Imported high-strength alloy steel, ensuring stable transmission of high torque.
Screw Elements: Optional high-speed tool steel or powder metallurgy alloy ó wear-resistant and corrosion-resistant.
Barrel: Nitrided steel base material (38CrMoAlA), with optional nickel-based tungsten carbide or alloy steel liner ó wear-resistant and corrosion-resistant.
Die Head: Specialized flow channel design, uniform plate-hole discharge, reducing spaghetti breakage.
Control System: Siemens high-performance PLC, bus control, with IoT interface. Dual PID algorithm for heating/cooling.
Data-Driven Control: Optional stand-alone IoT system for the entire line ó real-time collection and analysis of key data for transparent management.

Main Model	Main Motor Power(kW)	Speed (rpm)	Specific Torque (Nm/cm3)	L/D Ratio
LSPD-50M	110	600	12.2	40D~56D
LSPD-58M	160	600	11.5	40D~56D
LSPD-63M	200	600	11.3	40D~56D
LSPD-75M	315	600	10.3	40D~56D
LSPD-93M	500	480	11.3	40D~56D
Note: Above specifications can be customized according to specific project requirements.

Counter-Rotating Parallel Twin-Screw Extruder

Mainly used for pelletizing PVC medical hose, pipe fittings, and profiles. L/D ratio: 32D – 36D
Optimized l screw design suitable for both low-filling and high-filling (e.g., calcium carbonate filling) formulations.
Barrel lined with alloy sleeve (wear-resistant and corrosion-resistant). Screw material: alloy tool steel or powder metallurgy high-speed steel.
Drive system: ultra-high efficiency permanent magnet synchronous servo motor -offering energy savings and high efficiency.
Air-cooled die-face pelletizing head (hinged screen changer for easy operation).
Siemens PLC bus control, with optional Flexcon/ stand-alone IoT system for real-time data collection and analysis.

Main Model	Output(kg/h)	Main Motor Power(kW)
LSPD75-36	550	55
LSPD93-36	750	75
LSPD135-36	1600	185
LSPD186-36	2500	280

Versatile Pelletizing Technologies & Comparison

Underwater pelletizing

The pelletized particles are uniform without adhesion, suitable for high-volume continuous production.
The circulating cooling pipeline is fully enclosed, environmentally friendly and odorless.
Efficient centrifugal dehydration is set up, with large dehydration capacity and fast cooling speed.
Double-station screen changer, which can realize non-stop screen change.
The start valve is made of nitrided steel with nitrided and hardened surface, and the template head heats up quickly.

Water ring pelletizing

Simple structure and low cost.
Small footprint and low maintenance cost.
Uniform pelletizing and smooth surface.
Good cooling effect and relatively high production capacity.

Strand Pelletizing

The pelletizer adopts gantry type, reasonable structure and no accumulation of particles.
The hob adopts carbide and has a long service life.
High-power drive motor to ensure that the pelletizing willnot get stuck.
Simple structure and high-cost performance.

Hot Face Cutting Pelletizing

The air cooling & hot face cutting pelletizing head adopts loose-leaf type, which is easy to operate.
Patented spiral cooling technology, internal and external double cooling channels, high production capacity.
The equipment is maintenance-free and low-noise.
The process is fully enclosed and environmentally friendly.

Pelletizing Mode	Applicable Scenarios	Advantages
Underwater Pelletizing	High output, high quality, environmentally friendly	Uniform pellets, enclosed cooling, low moisture content
Water Ring Pelletizing	Recycling pelletizing, high-filling masterbatch, low-viscosity materials	Uniform pellets, low investment
Strand Pelletizing	Recycling, compounding, reinforcing, and filling pelletizing	Wide application range, simple maintenance, good fiber length retention
Air-Cooled Die-Face Pelletizing	PVC pelletizing, low-smoke halogen-free cable compound pelletizing	No water treatment, low investment, suitable for water-sensitive materials
Note: Underwater pelletizing produces round, uniform pellets suitable for high-end products. Water-cooled spaghetti pelletizing is a classic solution with high cost-performance.

Packaging

The machine has independent intellectual property rights, reasonable structural design with small packaging （25Kg/bag）.
High packaging efficiency （200～400 bags/hour, and easy operation of ton bags.

Compound

Plastic Pelletizing Line & Compounding Solutions

Applications of Our Plastic Pelletizing Lines:

Integrated Systems of a Turn-Key Pelletizing Line

Dosing & Mixing