Semi-Paste Filling and Sealing Machine: The Precision Art and Industrial Advantages for Viscous Materials
Semi-Paste Filling and Sealing Machine: The Precision Art and Industrial Advantages for Viscous Materials
In the industries of condiments, daily chemicals, and pharmaceuticals, the filling of semi-paste materials (such as ketchup, shampoo, toothpaste, and medical ointments) has always been a technical challenge. The semi-paste filling and sealing machine, leveraging its unique capability to handle high-viscosity materials, has become a crucial bridge connecting formula research and development with end-consumer consumption. Its development advantages are centered on metering accuracy, leak-free filling, and corrosion-resistant construction.
Exceptional metering accuracy in high-viscosity environments is the primary advantage of this type of equipment. Semi-pastes often exhibit shear-thinning properties or high cohesive forces. Modern filling technologies predominantly use piston-type volumetric filling or rotor pump methods. Driven by servo motors, the piston forces the suction and discharge of material within the cylinder, effectively overcoming the internal viscous resistance of the paste and ensuring filling errors are controlled within ±1%. Whether it's meat sauce containing particles or jam with poor fluidity, a clean and neat filling result can be achieved.
Secondly, anti-drip and non-stringing technology significantly enhance product appearance and packaging cleanliness. Pastes are prone to "tailing" after filling, which can contaminate the sealing area and lead to poor seals. Semi-paste fillers are typically equipped with positive pressure suck-back or submerged piston-type filling heads. At the moment filling finishes, these heads retract any remaining paste from the nozzle, completely eliminating drips. This keeps the sealing area dry, providing perfect conditions for subsequent heat sealing or foil sealing, and greatly reducing the defect rate.
Furthermore, corrosion resistance and high-torque drive systems ensure the equipment's durability. For acidic jams or salt-containing condiments, the filler's hopper, piston, and pipelines are often made of 316L stainless steel and treated with mirror polishing to prevent material residue and deterioration. On the power front, when dealing with high-resistance pastes, the equipment uses high-power reduction motors to ensure that the auger or piston pump can deliver strong thrust even at low speeds, preventing jamming. With the rise of prepared foods and complex compound seasonings, the semi-paste filling and sealing machine is iterating towards higher temperature resistance, larger capacities, and easier cleaning, becoming indispensable equipment in deep food processing.
