Extruded Snack Machine

Extruded snack machine

A twin-screw extruder is a continuous processing device that uses two intermeshing screws to convey, mix, shear, heat, melt, react, and shape materials within a closed barrel. It is widely used in food, feed, plastics, chemicals, pharmaceuticals, and biomass processing.

1. Basic structure and working principle
(1) Main components
Transmission system: motor, reduction gearbox, driving the twin screws to rotate.
Feeding system: precisely controlling material input (such as screw feeder, liquid injection pump).
Extrusion system:
Barrel: segmented heating/cooling, modular combination.
Twin screw: rotating in the same or opposite direction, can be combined with different screw elements (conveying, shearing, mixing, etc.).
Die head system: determines the final shape of the product (such as puffed food, pellet feed).
Cutting system: rotating blades adjust the length of the product (such as pet food, snacks).
(2) Working process
Feeding section: material (powder, slurry, etc.) is fed into the barrel.
Conveying and mixing section: the screw rotates to push the material forward, while shearing and mixing.
Melting and reaction section: under high temperature and high pressure, the material undergoes gelatinization, denaturation or chemical reaction (such as starch gelatinization, protein cross-linking). Molding: The molten material is extruded through the die, where a sudden drop in pressure causes it to expand (e.g., in puffed foods).

Cutting and Cooling: The product is cut and cooled to set its shape.

3. Core Features and Advantages

✅ High mixing efficiency: The twin-screw meshing design allows the material to be sheared and folded repeatedly, and the mixing effect is far better than that of a single screw.

✅ Wide adaptability: It can process difficult-to-process materials such as high moisture (>30%), high fat (>15%), and high fiber.

✅ Precise temperature control: The barrel temperature is controlled in sections to adapt to different process requirements (such as low-temperature sterilization or high-temperature puffing).

✅ Versatility: By replacing the screw elements and die heads, products of different shapes and textures can be produced.

✅ Continuous production: High degree of automation, suitable for large-scale industrial manufacturing. 4. Typical application areas (1) Food industry Puffed food: potato chips, breakfast cereals, energy bars. Plant protein: artificial meat (textured vegetable protein TVP). Baby food: pre-gelatinized rice flour, nutritionally fortified complementary foods. (2) Feed processing Aquatic feed: Improve stability in water and reduce pollution. Pet food: puffed food, snacks (to improve palatability).

(3) Chemicals and new materials
Plastic modification: filling, blending, reinforcement (such as wood-plastic composites).

Biodegradable materials: extrusion molding of PLA and starch-based plastics.

(4) Medicine and bioengineering
Drug sustained-release carriers: preparation of solid dispersions by hot-melt extrusion.

Biomass processing: cellulose modification, enzymatic hydrolysis.

We accommodate the diverse needs of our customers and offer special customization based on their actual products to meet final requirements. Additionally, we provide free pre-project testing and factory layout planning, and we test the entire production line before shipment to reduce the risk of factory failures.

Before sale services:

1. Provide initial standard machine configurations.
2.According to the clients' special requirment,offer customized and competitively priced solution. Where necessary,offer customer with options .
3.Help client design the factory and offer professional advice ,provide free drawing for the factory layout.
4.Welcome to visit our factory for machine viewing or trial.

Services during the sales:

1.Provide customer with regular production status update.
2. Invite customer for inspection of machine before delivery.

After sale services:

1.Oversea install of the equipment.
2.Provide the basic food formulation.
3.Operation/Service/Maintenance Manual: Provided in English.
4. We will provide engineers to client's factory for the installation and training . The client is required to provide accomodation,food, round-trip ticket, visa,transportation fee and engineer fee of $80 /day/engineer.

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