Factory Noise Control: Why Shuliy’s PET Recycling Line Runs Quieter
High decibel output in waste recycling is more than an environmental compliance headache—it is a sign of severe mechanical friction and structural vibration.
A standard unshielded PET crushing station can easily spike to 100–105 dB(A), violating OSHA safety codes and rapid-failing vital bearings. Below is how Shuliy Machinery engineered physical sound dampening directly into our machinery frame, reducing the floor noise level down to a safe 75–80 dB(A).
1. The Raw Noise Profile: Where is the Noise Coming From?
In a high-capacity plastic processing plant (3000 kg/h), noise centers around two primary machines:
- The Crusher: Driven by a massive 90kw motor, hitting tough plastics with high-speed rotary blades.
- The Centrifugal Dryer: Rotating at extremely high RPMs using a 37kw motor to strip moisture.
2. The Shuliy Advantage: Our 3 Built-In Noise-Reduction Features
Instead of relying solely on expensive external soundproofing, Shuliy solves the vibration and noise issue at the machine fabrication stage.
Feature A: Heavy-Duty Cast Frame (Mass Dampens Vibration)
- The Problem in cheap machines: Light sheet-metal housings vibrate like a guitar body, multiplying the motor and cutting noise.
- The Shuliy Advantage: Nuestro heavy-duty Trituradora de PET (Type 120) is constructed with a 30mm thick solid-steel box frame and heavy 40mm thick blade holders. This massive structural weight absorbs kinetic shocks, dampening vibration noise by up to 8–10 dB(A) at the source.
Feature B: Standardized Wet Crushing
- The Shuliy Advantage: Our systems are configured exclusively for wet crushing. Injecting a steady stream of water directly into the cutting chamber cools our SKD11 blades, lubricates the material, and creates a thick liquid sound dampening barrier. This alone drops high-frequency plastic cracking noise from an intolerable 105 dB(A) to below 90 dB(A).
Feature C: Gravity-Aligned Horizontal Dryer vs. Vertical Dryer
- The Problem in cheap machines: Vertical dryers force heavy PET flakes upward against gravity, placing huge unsymmetrical loads on bottom bearings, causing rattling, vibration, and quick bearing failures.
- The Shuliy Advantage: We use a horizontal centrifugal dryer. With a 37kw motor running on heavy-duty dual-end bearings, the mechanical load is distributed evenly along the horizontal axis. This reduces structural shake and prevents high-frequency wind-shearing noise.
3. Smart Layout Engineering for Plant Operators
For high-capacity plants (3000 kg/h), we recommend two layout tactics:
- Isolate the Crushing Station: Place the crusher inside a simple concrete-block room. This physically shields workers on the upfront manual sorting platform from the loudest processing step.
- Protect the Intake: Ensure bulk compressed bales are fully loosened using our automated bale breaker and trommel screen before entering the crusher. Loose feeding prevents the motor from choking and drawing extra current, which keeps operating noise flat and stable.
Summary of Investment Value
| Característica | Standard Cheap Machine | Shuliy Machinery | Inside Edge |
|---|---|---|---|
| Crusher Box Thickness | 12–16 mm | 30 mm Solid Steel | Structural mass stops vibration at the source |
| Blade Holder Thickness | 20–25 mm | 40 mm Heavy-Duty | Resists shock, less blade chatter |
| Dewatering Layout | Vertical (High Vibration) | Horizontal Dual-End Bearings | Smooth axial rotation, low noise, long bearing life |
| Noise Level (W/ Enclosure) | ~90 dB(A) (Unsafe) | 75–80 dB(A) (Safe & Compliant) | Fully meets OSHA 8-hour shift safety standards |
By investing in thick-wall fabrication, wet-impact engineering, and balanced horizontal rotation, Shuliy plants protect employee health, guarantee municipal noise compliance, and experience far less mechanical wear and downtime.
