HETAI Custom three-side Seal Forming Shoulders Empower European Client's 20-lane Stick Pack Machine

In the field of liquid stick pack filling, the forming shoulder acts as the "heart mold" of the entire production line. It directly determines the smoothness of film conveyance, pouch shape consistency and sealing stability. Most importantly, it dictates whether a multi-lane high-speed packaging machine can reach its rated output and maintain stable long-term operation. Confronted with strict production standards for high-end liquid stick packs for European pet food, nutraceuticals and pharmaceuticals, HETAI boasts in-depth expertise in core forming shoulder technologies. We have meticulously developed dedicated three-side seal forming shoulders for multi-lane machines and delivered complete forming solutions for our European client's 20-lane high-speed stick pack main units, supporting large-scale production for overseas partners through precision manufacturing strengths.

Major operational bottlenecks of multi-lane parallel production equipment always stem from the forming process. Synchronized film feeding across multiple lanes tends to shift sideways; mismatched forming curvature and wrapping angles frequently lead to film wrinkling, collapsed pouches and misaligned sealing edges. Frequent machine halts for adjustments under high-speed running conditions will directly lower the overall line OEE. This challenge is especially prominent for the European client's 20-lane ultra-high-speed stick pack machine, which features fast single-lane operation and extremely high requirements for synchronization accuracy across all 20 lanes. Standard off-the-shelf general-purpose forming shoulders are completely unable to sustain heavy-duty continuous production.

Drawing on 15 years of R&D experience in forming components for packaging machinery, HETAI optimizes three-side seal forming shoulders across four core dimensions—material selection, curved-surface mechanical design, precision machining and surface treatment—with targeted customization for the operating parameters of 20-lane stick pack machinery.

We adopt high-hardness, wear-resistant special aluminum alloy as the base material. The material can withstand long-term high-speed friction from PET and composite aluminum foil films, greatly extending service life and cutting customers' frequency of spare part replacement. Curved profiles are refined via fluid dynamics and film stretching simulation calculations to precisely adjust bending radii and wrapping angles. Strict tolerance control is implemented on the contour of every forming unit among all 20 lanes, ensuring synchronized film feeding free of offset, uneven tension and wrinkling. All products undergo wear-resistant passivation surface treatment to eliminate quality defects such as film scratches and pouch surface blemishes. The modular split structure enables rapid disassembly, assembly and independent fine-tuning, drastically shortening downtime for routine maintenance and format changeovers, and is perfectly designed to accommodate flexible multi-SKU production at European manufacturing plants.

HETAI implements full-process quality control for every set of three-side seal forming shoulders, covering CAD simulation design, 5-axis precision machining, full dimensional inspection via 3D coordinate measuring machines and dynamic on-machine film running tests. This guarantees highly consistent parameters for all forming units of the 20-lane system, enabling perfect compatibility with the European client's SP-series 20-lane stick pack filling and sealing line. The production line can run stably at full load with a throughput of 2,000 pouches per minute, delivering pouches with crisp square edges, flat uniform sealing seams, and filling accuracy that consistently complies with EU food production regulations.

Deeply engaged in the global supply chain of core packaging components, HETAI aligns all R&D work with the actual production conditions of high-end overseas clients. Apart from standardized forming spare parts, we provide exclusive customized integral forming shoulder solutions tailored to clients' lane quantities, film materials and pouch specifications. The successful delivery of this batch of three-side seal forming shoulders for the European 20-lane stick pack machine once again validates HETAI's industry-leading manufacturing proficiency in multi-lane stick pack forming components.

Going forward, HETAI will keep upgrading forming structures and processing techniques. Relying on our advantages in precision components, we will empower packaging machinery manufacturers and end-product producers across the globe. We help more overseas clients break through bottlenecks in high-speed stick pack production and tap into huge potential in the global market for liquid snacks and pharmaceutical stick packs.