Integrated Laser Marking & Pouch Filling Capping for Automatic Batch Number Printing

In food packaging production lines, the clarity and permanence of marking information such as production date and batch number directly affect product compliance and brand reputation. Laser marking technology, due to its permanent marking, lack of consumables, high speed, and high efficiency, has become standard equipment in modern packaging production lines. This article is to elaborate on the combined design scheme of a laser marking machine and a spout bag filling capping machine. The key contents will be the location arrangement of the integrated equipment, the photoelectric sensing control logic, and the practical value this combination brings to manufacturing enterprises.

I. Design Background of the Combined Equipment

First, let's understand why the laser marking machine and the filling capping machine have started this cooperative model.

1.1 Why is it necessary to combine laser marking and filling equipment?

Traditional ink jet marking methods have the following pain points:

  ● Fading and blurring: Ink markings may fade due to friction and moisture during transportation and storage.

  ● High consumable costs: Ink and solvents are continuously consumed, resulting in high operating costs.

  ● Frequent maintenance: Problems such as print head clogging can lead to production interruptions.

Laser marking technology offers a superior solution: Permanent marking, no consumables, high-speed marking, non-contact processing, and is naturally compatible with automated production lines.

1.2 Applicable Scenarios

This combined solution is suitable for various sauce products packaged in spout pouches, especially suitable for:

  ● High-value-added products such as mustard, ketchup, nut butter, and salad dressing

  ● Export foods requiring long-term traceability

  ● High-end brands with strict requirements for label clarity

II. Equipment Integration and Positioning Design

In the above section, we explained the background of the joint design of the two types of equipment. Now, let's briefly explain how these two types of equipment achieve intelligent linkage. We will use a wasabi sauce spout pouch filling machine case as a specific example.

2.1 Overall Line Layout Diagram

In the wasabi sauce spout bag filling and capping production line, the precise position of the laser marking machine is the core of the joint design:

Bag Feeding System → Filling Station → Vibrating Disc Capping Feeding→ Laser Marking Station → Mechanical Hand Capping → Finished Product Output

2.2 Key Points of Physical Integration

According to the guideline in “Integration of Coding and Labeling Equipment with Bottling Machines” of Videojet, the following factors need to be considered for the physical integration of equipment:

III. Photoelectric Sensing and Control Logic

3.1 Working Principle of the Photoelectric Sensor Device

Install a photoelectric sensor at the laser marking station to achieve precise triggering:

The sensor detects the bag in place → The PLC receives the signal → The laser marking machine is triggered → Marking is completed → The bag continues to move forward to the capping station

This control logic ensures "marking only when there is a bag, and not marking when there is none," avoiding empty shots and energy waste.

3.2 Key Parameters for Synchronous Control

3.3 Control System Integration

The laser marking machine seamlessly connects with the filling machine PLC through standard industrial communication protocols:

  ● Supports Ethernet/IP, Profinet and other protocols

  ● Can receive batch number, production date and other data transmitted by the filling machine

  ● Real time feedback of marking status to the main control interface

IV. The Technological Advantages of Laser Marking

4.1 Marking Effect: Permanently Clear

Application effect of laser marking on the surface of spout bag:

Laser marking forms permanent etched marks on the surface of plastic packaging, which will not be blurred due to transportation friction or refrigerated storage.

4.2 Speed Performance: Matching Filling Line Requirements

In this scheme, the spout pouch bag filling machine has a speed of 15-20 bpm, while the laser marking machine can mark hundreds of bags per minute, fully meeting or even exceeding the filling speed requirements. The marking process does not need to pause, achieving true high-speed online production.

4.3 Operating Costs: Basically Zero Consumables

One of the core advantages of laser marking machines is the absence of consumables:

  ● No need for ink, solvents, or diluents

  ● No need to replace the nozzle regularly

  ● The comprehensive operating cost is only one-third to one-fifth of that of ink jet printers

V. Conclusion

The combined application of laser marking machine and spout bag filling capping machine represents a model of equipment integration in packaging production lines. Through precise position design, intelligent photoelectric sensing control, and seamless PLC docking, we have achieved:

  ● Forever clear batch number identification, never fading or blurring.

  ● High speed online marking, perfectly matching the filling speed.

  ● Zero consumables operation, significantly reducing operating costs.

  ● Complete traceability system to enhance brand reputation.

For small and medium-sized sauce producers who pursue quality and efficiency, this joint solution is an ideal choice for automation upgrade.