The machine is highly precise chemical pump, accurate and durable.Constant speed motor, frequency converter speed, stable flow, no running ratio.The whole machine is controlled by PLC, and the human-machine touch screen is simple and convenient to operate. Automatic timing and injection, automatic cleaning, automatic temperature control.High precision nose, light and flexible operation, no leakage.
- Low-speed high-precision metering pump, accurate proportioning, and the measurement accuracy error does not exceed +0.5%;
- The flow and pressure of raw materials are adjusted by frequency conversion motor with frequency conversion, with high precision and simple and fast proportional adjustment;
- Using three-layer storage tank, stainless steel inner tank, sandwich heating, outer insulation layer, adjustable temperature, safety and energy saving;
- Using PLC, touch screen man-machine interface to control equipment pouring, automatic cleaning and air flushing, stable performance, strong operability, abnormal conditions
- It will automatically identify, diagnose and alarm, and display abnormal factors;
- The mixing device is equipped with a pressure balance device, which can eliminate the flow error, improve the accuracy, and ensure the product has no macroscopic bubbles.
Product Parameters
| Type | SPU-LS2-60 | SPU-LS2-200 | SPU-LS2-400 | SPU-LS2-800 | SPU-LS2-1200 | SPU-LS2-1800 | SPU-LS2-2500 |
|---|---|---|---|---|---|---|---|
| Flow Range | 15-60g | 80-320g | 100-400g | 200-800g | 500-1500g | 550-1800g | 800-2500g |
| Application | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam | Rigid/Flexible/Integral Skin Foam |
| PLC | DELTA/SIEMENS | DELTA/SIEMENS | DELTA/SIEMENS | DELTA/SIEMENS | DELTA/SIEMENS | DELTA/SIEMENS | DELTA/SIEMENS |
| HMI | DELTA | DELTA | DELTA | DELTA | DELTA | DELTA | DELTA |
| Pigment | Support | Support | Support | Support | Support | Support | Support |
| Filler | Support | Support | Support | Support | Support | Support | Support |
| Components | 2-5 | 2-5 | 2-5 | 2-5 | 2-5 | 2-5 | 2-5 |
| Customize | Support | Support | Support | Support | Support | Support | Support |
What Is a PU Ear Plug Making Machine?
This PU ear plug making machine is a low-pressure polyurethane foaming system engineered for high-volume earplug production. It pairs low-speed high-precision metering pumps with PLC and touch-screen control, automatic cleaning and temperature regulation to deliver stable, repeatable foam shots for slow-rebound and memory-foam earplugs. With a flow range from 15g up to 2500g across the SPU-LS2 series, a single platform covers sample runs through full-scale production.
Who Uses This Machine & What It Can Produce
This low-pressure ear plug making machine is built for earplug and slow-rebound memory-foam product manufacturers who run their own molding lines, not for brands sourcing a finished consumer product. Typical buyers are OEM/ODM factories producing slow-rebound and memory-foam earplugs who need consistent, repeatable foam shots batch after batch.
Low-pressure vs. high-pressure: this SPU-LS2 low-pressure platform is the right choice when precision dosing and gentle, stable mixing matter more than speed – it suits slow-rebound and memory-foam earplug formulations where shot-to-shot consistency drives product quality. For higher-volume runs where faster cycle times matter more than the finest dosing control, the PU High-Pressure Earplug Making Machine is the better fit.
The seven SPU-LS2 models map to two buying scenarios: the smaller end of the range (SPU-LS2-60, 15-60g; SPU-LS2-200, 80-320g) suits sample development and small-batch trial runs, while the larger models (SPU-LS2-800 through SPU-LS2-2500, 200g up to 2500g) are sized for full-scale production. Buyers can start with a smaller model for sampling and scale up within the same SPU-LS2 platform as order volume grows.
Related PU Foaming Machines and Earplug Lines
- PU High-Pressure Earplug Making Machine — high-pressure alternative for faster cycle times.
- Slow Rebound PU Foam Earplugs Production Line — complete turnkey line for slow-rebound earplugs.
- Polyurethane High-Pressure Foaming Machine for Memory Foam — for memory-foam pillow and cushion foaming.
Frequently Asked Questions
What is the output capacity of the SPU-LS2 series?
The SPU-LS2 series covers seven models with flow ranges from 15-60g (SPU-LS2-60) up to 800-2500g (SPU-LS2-2500) per shot, so the same platform can be sized for sample runs or full-scale earplug production.
What’s the difference between low-pressure and high-pressure earplug foaming machines?
The low-pressure SPU-LS2 series uses low-speed, high-precision metering pumps for accurate, gentle dosing suited to slow-rebound and memory-foam formulations. The high-pressure version trades some of that dosing finesse for faster cycle times, which suits higher-volume runs.
Which SPU-LS2 model should I start with for sampling?
For sample development or small-batch trial runs, the smaller models such as SPU-LS2-60 (15-60g) or SPU-LS2-200 (80-320g) are the usual starting point. Production can then scale up to the larger models on the same platform as order volume grows.
How much does a PU ear plug making machine cost?
Pricing depends on the model, flow range and configuration (PLC brand, tank options, customization). Contact our sales team for a quote based on your target output and application.