The short answer is yes, absolutely. Specialized plastic crushers, often called shredders, shredder machines, crusher machines or crushing machines in industrial contexts, are specifically designed to handle materials like EVA, PVC, TPR, and rubber used in slippers and footwear.

XINYI MACHINERY is a classic example of a manufacturer that produces the right type of equipment for this application. Here’s a detailed breakdown of what you need to know:

Why Standard Crushers Might Struggle with Slippers

Slippers pose specific challenges:

1. Mixed Materials: A single slipper can have a soft EVA foam midsole, a tough TPR/rubber outsole, and fabric/PU straps.

2. High Abrasion: TPR and rubber are very abrasive and can quickly wear down standard blades.

3. Flexibility: EVA and some rubbers are soft and elastic, which can cause wrapping around shafts or jamming in incorrect machine designs.

4. Size & Shape: Whole slippers are bulky and need to be fed and reduced efficiently.

Key Features of Crushers Built for EVA/PVC/TPR Slippers

The correct machines from manufacturers like XINYI typically have these characteristics:

1. Rotor Design: They use a "scissor-cut" or "shear-cut" rotor with staggered, hook-shaped blades. This design grabs, shears, and cuts the material cleanly rather than just hammering it, which is essential for elastic and tough materials.

2. Robust Blade Material: Blades are made from high-grade alloy tool steel (like 9CrSi or SKD11) and are often heat-treated to withstand the abrasion of rubber and TPR. They are also replaceable and re-sharpenable.

3. Sturdy Construction: The entire frame, chamber, and shafts are built heavier to handle the stress and vibration of crushing dense rubber.

4. Screen or Grate: A screen with the desired hole size (e.g., 8mm, 10mm, 12mm) controls the final granulate/pellet size. For rubber recycling, screens with "slots" are sometimes used.

5. Hopper Design: A wide, often ramped or hydraulic-push hopper allows operators to feed whole or bundled slippers easily.

Typical Machine Types for This Application

1. Heavy-Duty Central Axle Shredders (Single Shaft): Ideal as the primary size reduction step. They can take whole slippers, production scrap, or defective batches and shred them into large strips or small pieces (50-30mm). This is often the first stage.

2. Granulators (or Crushers): These are used for the secondary size reduction. They take the shredded strips and further cut them into clean, uniform granules or flakes (3-12mm) suitable for recycling, repellettizing, or direct reuse in molded products.

3. Two-Shaft Shredders: Excellent for high-volume and mixed waste streams. The two intermeshing shafts shear and tear the material apart, handling large, bulky items very effectively.

Application Process for Slipper Recycling

A typical recycling line might look like:
Whole Slippers → Heavy-Duty Single/Dual Shaft Shredder (coarse reduction) → Granulator/Crusher (fine grinding to flakes) → Cleaning & Washing Line (optional) → Pelletizing Extruder (to make new raw material).

About XINYI MACHINERY

XINYI is a prominent Chinese manufacturer that caters to this exact market. Their product range typically includes:

· S-series Single Shaft Shredders: Well-suited for bulky, mixed slipper scrap.

· Central Axle Crushers/Granulators: For producing final granules.

· Pipe Crushers / Drum Crushers: While for different shapes, the underlying robust blade and gearbox technology is similar.

Important Note: When contacting any manufacturer (including XINYI), be prepared to provide details for an accurate quotation:

· Material Type: Specify exact percentages if possible (e.g., 70% EVA, 30% TPR).

· Input Form: Whole slippers, sprues & runners from injection molding, or post-consumer waste?

· Feed Size: Dimensions of the largest pieces you will put in.

· Output Size: Desired final particle size (in millimeters).

· Capacity: Required throughput (e.g., 200 kg per hour).

Conclusion

Yes, there are powerful and effective plastic/rubber crushers that can crush EVA, PVC, and TPR rubber slippers. Companies like XINYI MACHINERY specialize in building them. The key is to select a machine with a shear-cut rotor, hardened alloy blades, high torque drive, and a robust construction designed for abrasive and elastic materials.

For the best results, it is highly recommended to send material samples to the manufacturer for a real crushing test. This ensures the machine selected matches your specific material mix and output requirements perfectly.