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Product Description
Ask any production manager which material causes the most trouble at the feeding station, and the answer is almost always the same: regrind. Pellets are round, uniform, and predictable. Powders are fine, but with the right filter they behave. Crushed plastic is neither. It is a mixture of irregular flakes, angular fragments, long slivers, and fine dust — every piece a different size and shape, every batch a different geometry. And that irregularity makes it the hardest material in the plant to move reliably.
Consider what a crusher actually produces. A plastic crusher reduces rejected parts, purgings, pipe ends, film scrap, and sprues into fragments sized for reprocessing. The output is a heterogeneous mix: flat flakes from film and sheet, chunky pieces from thick-wall pipe, slivers with sharp edges, and a measurable fraction of fine powder generated by the crushing itself. When this material is fed back into the process — to a pelletizing line, an extruder, or a mixer — it has to be moved from the crusher or storage bin to the machine. And that is where the trouble begins.
1. Bridging — the Material "Arches" and Stops. Irregular flakes interlock when they pile up. In a hopper or funnel with shallow angles, the flakes wedge against each other and form an arch — a bridge — that supports the weight of the material above it. Nothing falls through. The loader keeps running, the machine downstream starves, and an operator has to climb up with a rod to break the bridge by hand. On a busy shift, "poking the hopper" becomes a recurring, unproductive ritual.
2. Clogging — the Material Jams in the Line. Regrind does not flow like pellets. Angular pieces catch on pipe bends, on valve seats, on any transition where the flow path narrows or changes direction. A long flake that rides the air stream sideways jams across a bend; a cluster of interlocked pieces plugs the inlet of a conventional loader. The result is a stopped line, a disassembly job to clear the blockage, and lost production while it happens.
3. Dust — Every Batch Carries It. Crushing generates fine dust as an unavoidable by-product, and that dust coats the regrind. Open handling of crushed material puts this dust into the air — the same respiratory and housekeeping problem that powder plants face, but in a recycling environment where it is often tolerated as "normal" simply because it has always been there.
4. Wear — Sharp Edges Are Abrasive. Angular regrind flakes have cutting edges. Every conveying cycle grinds those edges against the hopper wall, the pipe, and the loader internals. Lightweight conveying equipment wears through quickly; the material that is supposed to save money by recycling starts costing money in maintenance.
A conventional loader — designed for round, free-flowing pellets — fails on all four counts. That is why Chenxing developed the CSP series crushing material suction machine: a vacuum loader engineered specifically for regrind, built around three features printed on the machine itself — anti-bridging design, stable no-clogging conveying, and low maintenance — with a maximum capacity of 2000 kg/h.
The CSP machine is a vacuum conveying system purpose-built for crushed plastic. Like all vacuum loaders, it uses negative pressure to pull material through a sealed line; unlike a general-purpose loader, every component is shaped and sized for the awkward geometry of regrind.
Vacuum source (blower/pump) ── negative pressure in the conveying line │ ▼ [1. Suction] ──── the suction hose/nozzle is placed in the crushed │ material bin, crusher discharge, or storage hopper; │ flakes and fragments are drawn into the line ▼ [2. Transport] ──── regrind travels through the large-diameter, │ smooth-bore pipe as a dilute-phase suspension ▼ [3. Separation] ──── the material enters the separation chamber; │ flakes drop out of the air stream by gravity ▼ [4. Anti-Bridging Hopper] ──── material falls through a steep-angle, │ anti-bridging hopper into the extruder feed throat, │ mixer, or storage silo — no arching, no hanging ▼ [5. Filtration] ──── conveying air passes through the filter, │ capturing the dust that rides with the regrind ▼ [6. Discharge / Recycle] ──── clean air is exhausted; the cycle │ repeats on demand for continuous feeding ▼ [Finished: regrind delivered, line clear, production uninterrupted]
1. Vacuum Generation — Steady Negative Pressure. A blower or vacuum pump generates the negative pressure that drives the conveying. The CSP machine maintains a stable vacuum level tuned to the conveying distance and the bulk density of the regrind — strong enough to lift heavy fragments, controlled enough to avoid over-drawing fines into the filter. This stable vacuum is the foundation of "stable, no-clogging" operation: the air velocity is kept in the window where flakes ride smoothly instead of stalling or jamming.
2. Suction and Transport — Big Bore, Smooth Path. The intake end is placed where the regrind is: under a crusher discharge, in a storage bin, at a gaylord box, or beside a side force feeder or agglomeration station. The machine uses a large-diameter conveying line with smooth internal surfaces and generous bend radii — geometry chosen so that long, angular flakes can travel without catching. This is the first line of defense against clogging: the path is simply too open for pieces to wedge across it.
3. Separation — Letting the Flakes Fall. At the machine, the regrind/air mixture enters the separation chamber, where the air velocity drops sharply. The flakes — far heavier than air — fall out of suspension. Because regrind is irregular, the separation chamber is designed with no internal ledges, bolts, or pockets where a flake could catch and hang. Everything the suction pulls in falls through.
4. The Anti-Bridging Hopper — Where Most Loaders Fail, the CSP Wins. From the separation chamber, the material falls into the discharge hopper and from there into the machine being fed — an extruder feed throat, a mixer, or a storage silo. This transition is where conventional hoppers fail with regrind: shallow wall angles let flakes interlock into an arch. The CSP hopper is engineered with:
A steep, large-angle cone that keeps the material moving toward the outlet — the geometry of the hopper alone prevents most arching;
A smooth, anti-hang-up internal surface — no flanges, welds, or roughness where a flake can catch;
A generously sized discharge opening that matches the large-diameter conveying line, so even the biggest flakes pass through;
Optional bridge-breaking provisions for the most difficult materials, ensuring that even heavy, interlocking regrind keeps flowing.
The result is the machine's first defining feature: anti-bridging — the crushed material falls through cleanly every cycle, and the operator never touches a poking rod.
5. Filtration — Containing the Crushing Dust. The conveying air, after the flakes have separated, still carries the fine dust generated by crushing. The CSP machine passes this air through a filter before exhausting it, capturing the dust so it does not enter the plant. The filter is easy to access and clean as part of the machine's low-maintenance design.
6. On-Demand Cycling — Continuous, Automatic Supply. The CSP machine cycles automatically: when the downstream hopper level drops, the machine runs a suction cycle; when the hopper is full, it stops. This on-demand operation keeps the extruder or pelletizing line continuously supplied without an operator watching the material level — the second pillar of reliable, uninterrupted production.
The CSP series crushing material suction machine is offered in a range of capacities, with the largest configuration rated for a maximum throughput of 2000 kg/h.
| Parameter | Value |
|---|---|
| Product series | CSP Series Crushing Material Suction Machine |
| Maximum conveying capacity | Up to 2000 kg/h |
| Materials handled | Plastic regrind, crushed flakes, irregular scrap, reprocessed fragments |
| Feeding design | Anti-bridging hopper (steep cone, anti-hang-up surface, optional bridge breaker) |
| Conveying | Stable vacuum, large-diameter no-clogging line |
| Filtration | Easy-access filter for crushing dust |
| Maintenance | Low-maintenance design (few wearing parts) |
| Operation | Automatic on-demand cycling, sealed vacuum conveying |
Because every recycling line differs — regrind shape, particle size, conveying distance, destination height, and throughput all influence the correct configuration — Chenxing sizes each CSP unit for the specific application. The CSP series is available in multiple capacities up to 2000 kg/h, with custom sizing on request. Tell our engineers what your crusher produces, how far the material must travel, and how fast your line consumes it, and we will specify the conveying line, vacuum source, hopper geometry, and filter configuration to match.
Feature: The CSP machine is built with an anti-bridging hopper: a steep, large-angle cone with a smooth anti-hang-up internal surface and a generous discharge opening, with optional bridge-breaking provisions for difficult materials.
Advantage: Conventional hoppers with shallow angles let irregular flakes interlock into an arch that supports the material above it. The CSP geometry keeps the material moving toward the outlet, and the smooth internal surface gives flakes nothing to catch on.
Benefit: Crushed material flows through the loader cleanly, cycle after cycle. The operator no longer climbs to the hopper with a rod to break bridges, production no longer stops while someone "pokes the machine," and the feeding station runs unattended — which is exactly what a recycling line needs.
Feature: The CSP machine uses a large-diameter conveying line with smooth bores and generous bend radii, combined with stable vacuum control that keeps the air velocity in the reliable conveying window.
Advantage: Regrind clogs when angular pieces catch on narrow transitions, tight bends, or valve seats. By keeping the flow path open and the conveying velocity stable, the CSP machine gives the flakes no opportunity to jam.
Benefit: No production interruptions to clear blocked lines, no disassembly-and-clear jobs in the middle of a shift, and no lost output from a plugged loader. The line that feeds your extruder or pelletizer simply keeps running — maximizing the utilization of the equipment downstream.
Feature: The CSP loader is built around a low-maintenance philosophy: a simplified structure, minimal wearing parts, and an easily accessible filter that is quick to clean.
Advantage: Every wearing part and every hard-to-reach component is a future maintenance event. The CSP design removes them, and the filter — the one component that does need periodic attention — is designed for quick access and simple cleaning.
Benefit: Maintenance hours and spare-part costs drop sharply, and the loader can be looked after by general plant staff rather than specialist technicians. The machine spends its time conveying material, not in the repair shop — the true cost of ownership is lower from the first month.
Feature: The CSP series is rated for a maximum conveying capacity of up to 2000 kg/h of crushed material.
Advantage: A large recycling plant feeding a high-output water ring pelletizing line or a big extruder consumes regrind continuously. 2000 kg/h keeps pace with the fastest crushers and the hungriest extruders.
Benefit: The feeding station stops being the bottleneck. The crusher can run at full speed, the downstream line never starves, and the plant's output is set by the process — not by how fast material can be carried in by hand.
Feature: The CSP machine conveys regrind through a fully sealed line under negative pressure, from the suction point to the discharge point.
Advantage: Negative pressure is inherently leak-proof — imperfect joints leak air in, not dust out. The dust that coats every batch of crushed material stays inside the conveying circuit and is captured by the filter instead of entering the plant.
Benefit: A visibly cleaner recycling workshop, better respiratory conditions for the operators, less dust settling on machines and floors, and no material loss from spills and drifts. The plant meets the dust expectations of modern manufacturing — even in the harshest recycling environment.
Feature: The CSP loader can be integrated with the crusher, extruder, or mixer control for automatic on-demand feeding — suction starts when the downstream hopper level drops, stops when it is full.
Advantage: Coordinated with the downstream process, the loader delivers regrind exactly when needed, in the right quantity, with no operator monitoring. It can be interlocked with a CJ magnetic frame / hopper magnet at the feed point to protect the process from tramp metal that survives crushing.
Benefit: Consistent, repeatable feeding batch after batch — the same regrind ratio, the same mixer load, the same extruder behavior. Operators are freed from material-watching duty, and the regrind feeding step becomes a transparent, dependable part of the automated line.
Feature: The CSP machine is engineered for the full range of crushed plastic: flat flakes from film and sheet, chunky fragments from thick-wall pipe, long slivers, and dust-laden mixed scrap — conveyed through wear-resistant, large-passage components.
Advantage: A general-purpose loader tuned for pellets chokes on this mix. The CSP's large passage sizes, wear-resistant internals, and anti-bridging geometry handle the entire spectrum of what a crusher produces — no pre-screening, no sorting, no special handling.
Benefit: One machine covers all the regrind feeding needs of the crushing workshop — from crusher to pelletizing line, from storage bin to extruder. The plant simplifies its equipment list, reduces handling steps, and gains the flexibility to feed any regrind from any source.
Feature: The CSP machine is built with a robust structure — wear-resistant conveying surfaces and durable construction throughout — to withstand the abrasion of sharp-edged regrind.
Advantage: Angular flakes grind against every surface they touch; lightweight equipment wears through quickly, and worn surfaces create new catching points for clogging. Heavy-duty construction resists this wear and stays smooth, preserving both the equipment and its anti-clogging performance.
Benefit: A long service life even in the harshest recycling duty, lower replacement-part cost, and reliable performance that does not degrade as the equipment ages. The CSP loader is an asset that serves the recycling line for years.
The CSP crushing material suction machine sits at the center of the recycling material flow — between the equipment that makes regrind and the equipment that consumes it.
[Plastic Scrap / Waste] │ ▼ [Plastic Crusher] ── produces irregular flakes, fragments, and dust │ ▼ [Regrind Storage / Bin] ── or direct crusher discharge │ ▼ [CSP Crushing Material Suction Machine] ── sealed vacuum conveying │ ▼ [Pelletizing Line / Extruder / Mixer]
Step 1 — Crushing. Waste plastic — rejected parts, purgings, pipe ends, film scrap, sprues — is reduced by a plastic crusher or a plastic crusher for pipe scrap into regrind. For pipe producers, PVC pipe scrap is crushed directly at the line end and returned to the process immediately.
Step 2 — Conveying. The CSP machine draws the regrind from the crusher discharge or storage bin and delivers it through the sealed line to the consumer — typically a pelletizing line feed hopper or an extruder throat. Because the conveying is automatic and continuous, the downstream machine always has material.
Step 3 — Reprocessing. The regrind reaches the pelletizing line — a water ring pelletizing line, an underwater pelletizing system, or a PVC hot-cutting pelletizing line — where it is melted, filtered, and reformed into pellets for the next production cycle. Alternatively, it feeds an extrusion line directly as a blend component. Where film scrap is the source, the agglomerator / film densifier densifies the material before pelletizing, and the CSP machine moves the densified chips onward.
Not all conveying duties are the same, and Chenxing supplies the complete material handling range so that each material type gets the right machine:
| Material | Characteristics | Recommended Machine | Key Feature |
|---|---|---|---|
| Crushed regrind / flakes | Irregular, angular, dusty, bridges easily | CSP crushing material suction machine (this page) | Anti-bridging hopper, no-clogging line |
| Powders (PVC, CaCO₃) | Fine, dusty, filters easily | VLF powder suction machine | Customized filter cartridge, reverse-pulse cleaning |
| Pellets / granules | Round, uniform, free-flowing | screw feeder / automatic feeding machine | Screw metering, precise dosing |
The distinction is clear and important: powder needs filtration and reverse-pulse cleaning (VLF); pellets need metering and screw conveying; regrind needs anti-bridging geometry and a clog-resistant flow path (CSP). Each material gets the machine that matches its behavior — and the CSP is the answer to the regrind side of the equation.
The CSP machine plugs into a complete Chenxing material-handling ecosystem. Where regrind must be dried before reprocessing, a STG-U hopper drier plastic resin dryer conditions the material. Where virgin powder is compounded with regrind, a high-speed mixer industrial mixer blends the recipe and the VLF powder suction machine feeds the powder component. Where the regrind must be screened to size, a vibrating screen classifies the material before or after conveying. Where a fine powder product is required from the reprocessed stream, a SMF disc grinding pulverizer or PVC disc pulverizer grinds it down. And the downstream consumer may be a parallel co-rotating twin screw extruder compounding the regrind into a new formulation or a plastic pelletizer completing the recycling loop.
Whatever the recycling configuration, the CSP machine's role is the same: move the crushed material reliably, dust-free, and without blocking — so the line can run at its designed speed.
Yes — that is exactly what the machine is designed for. The CSP series is built around the two failure modes of irregular regrind: bridging and clogging. The anti-bridging hopper — a steep, large-angle cone with a smooth internal surface and a generously sized discharge — prevents flakes from interlocking into an arch. The large-diameter conveying line with smooth bores and generous bend radii gives angular pieces no surface to catch on. Whether your crusher produces flat film flakes, chunky pipe fragments, long slivers, or a mixed batch, the CSP conveys it without the jams that a general-purpose loader would suffer.
Because it was probably designed for pellets. Round, uniform pellets flow through shallow hoppers and narrow transitions; irregular regrind does not. Three geometry details make the difference: first, the hopper wall angle — shallow angles let flakes interlock and arch, while the CSP's steep cone keeps material moving; second, the conveying path — narrow bends and small-bore lines give flakes a place to wedge, while the CSP's large-diameter, smooth-bore line stays open; third, internal surfaces — bolts, flanges, and ledges catch slivers, while the CSP's anti-hang-up internals give them nothing to grab. The CSP was designed from the ground up around these three details.
Effectively none. Crushing generates dust that coats every batch of regrind, but the CSP machine conveys under negative pressure through a fully sealed line — at any imperfect joint, air leaks inward rather than dust leaking outward. The conveying air is filtered before exhaust, so the air returned to the plant carries no visible dust. Compared with open, manual handling of crushed material — where every scoop and pour releases dust — the CSP eliminates the dust cloud at the feeding station, keeps the floor clean, and keeps the operator's breathing zone clear.
Yes. The CSP loader is designed for automatic, on-demand feeding and can be interlocked with the crusher, pelletizing line, or extruder control: suction starts when the downstream hopper level drops below the set point and stops when it is full. It can also be sequenced with the crusher so that regrind is drawn away as it is produced, preventing bin overflow and double handling. This integration makes the regrind feeding step fully automatic — the downstream line always has material, the crusher never chokes on its own output, and no operator needs to watch the material level.
Choose by material form, not by the machine's appearance. If your material is powder — PVC resin, calcium carbonate, carbon black, or other fine powders — the VLF powder suction machine is the right choice: it uses a customized filter cartridge and reverse-pulse cleaning to handle the fine dust that powder generates. If your material is crushed regrind — flakes, fragments, and angular scrap from a crusher — the CSP machine is the right choice: its anti-bridging hopper and large-diameter no-clogging line handle the irregular geometry that powder equipment is not designed for. If you handle both, many plants install one of each, feeding the powder with the VLF and the regrind with the CSP. Chenxing can specify the complete combination.
The CSP series is built around a low-maintenance design — one of its three defining features. The structure is simplified with minimal wearing parts, and the components that do interact with abrasive regrind are wear-resistant. The one item that needs periodic attention is the filter, and it is designed for quick access and easy cleaning — a task a general plant worker can perform in minutes, not hours. Routine checks are limited to confirming the vacuum source, inspecting the conveying line connections, and verifying the hopper and filter condition — on the same schedule as the rest of the line. The machine is designed to run shift after shift with minimum attention.
The CSP series is available in multiple capacities up to 2000 kg/h, with custom sizing on request. For a large recycling plant, the correct capacity depends on your crusher output, the number of downstream consumers, the conveying distance, and the line's peak demand. A plant feeding a single high-output pelletizing line might need the full 2000 kg/h rating; a smaller operation running one extruder might need less. Chenxing engineers size the complete system — conveying line diameter, vacuum source, hopper geometry, and controls — from your production data, so the machine matches your line's real demand with margin to grow.
Step 1 — Tell Us About Your Regrind and Your Line: Share the material you crush (PE, PP, PVC, PET, or mixed), the typical flake size and shape your crusher produces, your required throughput, and the conveying distance from crusher or bin to the consumer. If the loader feeds a pelletizing line or extruder, tell us the consumption rate and hopper size.
Step 2 — Get a Sized Recommendation: Chenxing specifies the complete system: CSP capacity (from the range up to 2000 kg/h), conveying line diameter and routing, vacuum source, hopper configuration (including bridge-breaker options if your material needs them), and the control mode (manual or automatic on-demand). You receive a clear equipment list, layout drawing, and utility requirements.
Step 3 — Request a Quote from Nicole: Contact Nicole at +8615951187228 or ceo@cxsljx.com with your material details and plant layout. We respond within 24 hours with a formal quotation, delivery schedule, and freight options. Chenxing provides installation guidance, commissioning support, and operator training on the suction, anti-bridging, filtration, and maintenance operation.
Step 4 — Feed Regrind, Dust-Free, Without a Single Bridge: After installation, the CSP loader starts drawing crushed material through its sealed line immediately — flakes flow through the anti-bridging hopper, the line stays clear, and the downstream machine is fed automatically. No more poking, no more clogs, no more dust — just reliable, continuous regrind feeding.
For the complete material handling and recycling ecosystem, Chenxing also supplies: the VLF powder suction machine for powder conveying, screw feeders automatic feeding machines for pellets, plastic crushers for the source of the regrind, STG-U hopper driers for moisture control, SMP knife pulverizers and dual disc pulverizers for fine grinding, water ring pelletizing and underwater pelletizing systems for reprocessing, CJ magnetic frames hopper magnets for metal protection, and complete lines from PVC hot-cutting pelletizing to side force feeder film pelletizing. As a single-source partner, Chenxing Machinery supports every step from scrap to finished product.
Contact Chenxing Machinery Today:
Contact Person: Nicole
Phone / WhatsApp: +8615951187228
Email: ceo@cxsljx.com
Company: Zhangjiagang Chenxing Machinery Co., Ltd.
Website: www.chenxingmachinery.com
