Fully Automatic PLC-Controlled Liquid Soft Packing Machine for Dairy Products

The Fully Automatic PLC-Controlled Liquid Soft Packing Machine represents a state-of-the-art, turnkey solution designed specifically for the hygienic, efficient, and precise packaging of a wide range of liquid and semi-liquid dairy products. This advanced system automates the entire process from film feeding to final package discharge, ensuring consistent quality, maximum product safety, and high-speed production. By integrating sophisticated Programmable Logic Controller (PLC) technology, it offers unparalleled reliability, operational simplicity, and flexibility to meet the demanding standards of the modern dairy industry.

Specifications

Model	Capacity	Motor power	Bag volume(mm)	Size(mm)	Weight
WS-AYT-1	3000BPH	6.5KW	250-1000ml	1600x1080x2900	750KG
WS-QCF-2	8000BPH	9.5KW	250-1000ml	2340x1080x3060	1200kg

 

Primary Applications & Use Cases

This machine is engineered for dairy processing plants of various scales, catering to the packaging needs of:

• Cultured Products: Yogurt (set, stirred, and drinking), curd, lassi, buttermilk, and sour cream.
• Fresh Milk & Cream: Pasteurized milk, flavored milk, and fresh pouring cream.
• Dairy-Based Desserts: Puddings, custards, and mousses.
• Cheese Products: Soft cheese spreads and dairy dips.

It is perfectly suited for producing pillow-style soft pouches (stand-up or flat) in single-serving or multi-portion sizes. These packages are popular for their cost-effectiveness, lightweight nature, reduced storage space, and convenience for on-the-go consumption. The machine seamlessly integrates into production lines where extended shelf life (ESL) or aseptic processing is not the primary requirement but where high hygiene and operational efficiency are paramount.

Core Working Process & Technological Features

The machine’s operation is a continuous, synchronized cycle managed by the central PLC system. The core process can be broken down into key stages:

1. 1. Film Unwinding & Forming: A roll of pre-printed multilayer laminate film (e.g., PET/PE, MET-PET/PE) is mounted. The film is precisely fed through a series of guides and tensioners. It then passes over a forming shoulder, where it is shaped into a cylindrical tube.
   2. Vertical Sealing & Tube Creation: The longitudinal (vertical) seam of the film tube is created using a continuous heat-sealing mechanism, ensuring a strong, leak-proof seal.
   3. Product Filling: The dairy product is supplied from a pressurized hopper or a piston filler via a stainless steel product manifold. The PLC precisely controls the servo-driven filling system, which delivers accurate volumetric doses into the forming film tube. This guarantees minimal giveaway and precise portion control. The filling occurs without contact between the nozzle and the film, maintaining hygiene.
   4. Date Coding & Discharge: Optionally, a date/batch coder can imprint information onto the sealed area of the pouch. The finished pouches are then gently discharged onto a conveyor belt or into a collection tray for downstream handling, such as cartoning or case packing.
   5. Horizontal Sealing & Cutting: This is the most critical phase. Twin pairs of synchronized, heated sealing jaws close transversely across the filled film tube. They perform two simultaneous actions:
      • • Seal the top of the filled pouch below and the bottom of the new pouch above.
        • Cut apart the two seals, separating the finished package. The sealing temperature, pressure, and dwell time are precisely regulated by the PLC to ensure perfect, hermetic seals that are strong enough to withstand handling and transportation.

PLC Control & Key Advantages

The heart of the machine is its PLC-based control system, which provides:

• • Full Automation: Enables one-touch operation, automatic film tracking, and fault detection.
  • Precision & Consistency: Maintains exact fill volumes and sealing integrity across thousands of cycles.
  • User-Friendly Operation: A color Human Machine Interface (HMI) touchscreen allows for easy parameter setting (fill volume, speed, temperature), recipe storage, and provides real-time production data (output count, efficiency).
  • Quick Changeover: Facilitates rapid size adjustments and product changeovers, minimizing downtime.
  • Diagnostics & Safety: Monitors all machine functions, alerts operators to issues (e.g., film breakage, low product level), and ensures safe operation with integrated safety interlocks.
  • Hygienic Design: Constructed with food-grade stainless steel (contact parts), featuring a smooth, easy-to-clean surface that complies with dairy industry hygiene standards.

FAQ

Q: What products can this Liquid Soft Packing Machine package?
A: This machine is perfect for a wide range of liquid and viscous foods. Key applications include yogurt (set, stirred, drinking), milk, cream, dairy desserts, juice, sauces, and honey.

Q: What is a “soft pouch” and what are its benefits?
A: A soft pouch is a flexible, lightweight bag made from laminated film. Compared to rigid containers, it offers significant benefits: lower packaging material cost, reduced storage and shipping space, and enhanced consumer convenience for on-the-go products.

Q: What are the advantages of full PLC control?
A: The Programmable Logic Controller (PLC) ensures complete automation, high precision, and easy operation. It enables one-touch operation, precise fill volume, consistent sealing, quick recipe changeovers via the touchscreen, and provides real-time monitoring and fault alerts to minimize downtime.

Q: What is the typical production speed?
A: Speed depends on bag size and product. Standard machines typically run at a rate of 30-80 pouches per minute. We can provide customized speed assessments tailored to your specific requirements.