Issue 309 2026-06-10 Author : NAN YUN INDUSTRIAL CO., LTD. Souscrire

Food Machinery Performance Revolution: Mastering the Quality Key of Screws and Barrels from the "Heart"

From "Diet" to "Daily Use": The Essential Role and Quality Impact of Screws and Barrels

1. Consumers no longer prioritize "eating enough"; they value the addition of nutrition and health supplements. With shifting times and rising health consciousness, consumers—whether for themselves or their pets, and regardless of a vegan or meat-based diet—value nutritional content and balance. From plant proteins (tofu skin, meat analogues) to healthy snacks infused with superfoods (chia seeds, quinoa), the food industry is undergoing a "Nutrition Revolution". At the core of this revolution is the "heart" of the machinery: the screw and barrel. The value of the Nan Yun team lies in professional design and production that minimizes wear and extends the service life of these critical components.

2. Optimization and Balanced Formulations for Pet Food and Health Supplements. Modern pet owners prioritize the nutritional value, suitability, and complexity of pet diets. Whether plant-based or animal-based, regardless of kibble size or the volume of supplement additives, formulas must meet age-specific needs. This requires advanced processing to ensure all ingredients and combinations are perfectly homogenized.

3. Consistency in Quality for Packaging, Eco-friendly Materials, Plastics, and Complex Compounds. Whether dealing with eco-friendly materials or commodity plastics, precise screw and barrel designs are essential for proper resin plasticization. This ensures that functional additives (such as UV stabilizers and impact modifiers) are accurately and uniformly distributed during the compounding process. The ability to achieve high-efficiency mixing and homogenization—especially for high-value health ingredients with minimal dosages—is the defining factor for product quality and efficacy.

Technical Standards: High-Specification Requirements for Food-Grade Components

Unlike general plastic machinery, food-grade screws and barrels must adhere to much stricter standards:

● Food-Grade Materials and Hygiene Standards: Components must possess exceptional corrosion and acid resistance and comply with CIP (Clean-In-Place) standards to ensure zero dead zones and prevent cross-contamination.

● Core Thermochemical Reaction (Precision Temperature Control): Food processing is a controlled physicochemical transformation. Accurate temperature management protects heat-sensitive ingredients (such as plant proteins) from damage to texture and nutritional value.

From Stability and Homogenization to Durability: Maintenance for Extended Service Life

Preventative maintenance is the key to cost reduction. Early detection prevents metal wear particles from entering the product, safeguarding the final line of defense for food safety.

Maintenance Alerts: Four Major Warning Signs for Screws and Barrels

1. Unstable Current: Fluctuating motor current indicates uneven internal pressure.

2. Abnormal Noise: Metallic grinding sounds from the barrel (potentially due to a warped screw or damaged support bearings).

3. Increased Black Spots: A typical sign of "carbonization," suggesting surface scratches on the screw that cause residual material to char.

4. Performance Drop: A decrease in yield or severe pressure fluctuations.

Upgrade Reference: Single Screw vs. Twin Screw

Feature	Single Screw	Twin Screw
Structure	Simple, cost-effective	Intermeshing operation
Application	Simple transport, macaroni shaping	Plant-based meat, high-end pet food, complex formulas
Core Advantage	High stability	Superior mixing, self-cleaning, high shear intensity