In stick packaging production for powder, granulo, and liquid products, many pharmaceutical and food processing factories share the same frustration: The stick pack machine keeps generating waste.
Disallineamento della pellicola, twisted pouch shapes, filling weight deviations, seal leaks, and cutting defects. These five typical problems show up one after another, causing frequent downtime for adjustments, rifiuti materiali, and finished product returns. All these problems erode production profitability.
These are not unavoidable industry problems. Most of them stem from poor station design on the equipment itself. Below we break down the causes and corresponding solutions for the five most painful issues on the production floor.
Many general-purpose stick pack machines only come with basic film feeding structures, without automatic deviation correction. Once the machine speeds up, the stick pack film easily shifts left or right.
This triggers a chain of problems: uneven pouch widths across multiple lanes, misaligned printed patterns on the packaging, and tilted, twisted seal edges. Operators have to stop the machine constantly to manually adjust the film, eating into effective production time. Large amounts of waste pouches are generated during adjustment, keeping the reject rate high.
La soluzione: To fundamentally improve film path stability, the key is continuous automatic correction. Equip an auto-correction film feeding station that monitors the film position in real time and automatically adjusts it immediately when deviation occurs. The film stays on track during high-speed continuous production, senza che sia necessario alcun intervento manuale. Seal edges stay neat and uniform, reducing both downtime and waste.
Many manufacturers still use traditional iron forming molds. Steel has poor heat conductivity, and long-term exposure to heat and pressure causes deformation. The mold itself also has limited machining precision.
Durante la produzione, stick pack pouches easily develop wrinkles, local bulges, or overall twisting. Finished products in the same batch show obvious appearance differences. For high-end customers with strict quality requirements, appearance defects lead directly to full batch rejection. Allo stesso tempo, gaps in iron molds easily trap powder, making cleaning difficult and hard to meet clean production standards for food and pharmaceutical industries.
La soluzione: Upgrading mold material and machining process is the key. Use aluminum alloy CNC one-piece formed molds with higher machining precision. They resist deformation during long-term use and distribute heat evenly. Formed stick pack pouches come out flat and neat. The mold surface has a simple structure that does not trap material, making cleaning easy and meeting pharmaceutical and food clean production standards without hassle.
Filling accuracy is the part of the packaging line that most affects production cost. It is also the core pain point for many companies.
Ordinary stick pack filling machine models use a single power source to drive multiple filling lanes. The feeding speed and output volume of each lane are hard to keep consistent, leading to large weight fluctuations in finished products. Underweight products face quality inspection failure and full batch returns. Overweight products directly cause continuous raw material waste, eating into product profit. Unsynchronized multi-lane filling also triggers machine alarms, causing unplanned downtime.
La soluzione: Precise control relies on independent power systems. Install servo quantitative filling stations, with each lane driven by its own independent servo motor. Filling accuracy reaches ±0.02g. Multiple lanes discharge synchronously and stably, with highly uniform weight. Even during continuous high-speed mass production, deviations stay under control, greatly reducing raw material loss and avoiding quality risks from non-compliant weight.
This level of precision matters across stick pack industries, whether you run pharmaceutical stick pack packaging machines, food supplement powder stick pack packaging machines, cappuccino stick pack packaging machines, or coffee stick pack packaging machines.
Sealing failures are the most complained-about issue in equipment after-sales service. Ordinary heat sealing structures have large temperature fluctuations and uneven pressure at each point, easily forming weak or false seals.
Powder products absorb moisture and clump when air leaks in. Liquid products seep out. Products also tend to burst during long-distance transportation. Large numbers of failed products lead to customer returns and negative reviews, continuously increasing after-sales communication and compensation costs.
This problem affects every product category, from pharmaceutical stick products to honey stick packaging, liquid stick packs, and even energy stick formulations backed by energy stick science that demand airtight seals to preserve active ingredients.
La soluzione: Stable sealing depends on independent constant temperature control. The constant-temperature horizontal sealing station comes with an independent temperature control system. Temperature stays consistent and sealing pressure stays uniform, creating tight pouch seals. This eliminates leaks and seepage at the source, solving long-standing problems like powder moisture absorption, liquid leakage, and transit bursting.
Traditional mechanical cutters rely on rigid mechanical structures to pull the film directly to complete the cut. The pulling action during cutting causes uneven pouch lengths and can also tear the pouch body.
The matching easy-tear notch forming is also unstable. Either consumers struggle to tear it open, or the opening position is off, contaminating the internal material when torn. Large numbers of finished products are rejected for appearance or usability defects, making it hard to improve the yield rate.
La soluzione: Flexible cutting effectively avoids film damage. The servo cutting & easy-tear notch station uses servo-driven flexible cutting. The cutting process does not pull the film, so pouch lengths stay stable and uniform. Easy-tear notches form to standard with a clean appearance, reducing finished product defect rates and significantly increasing the number of qualified products.
Many companies only focus on the performance of a single stick pack packaging machine, but ignore the efficiency bottleneck caused by downstream process connections.
Finished stick pack products pile up randomly, requiring manual sorting, reorientation, and manual counting before feeding into the cartoning machine. This not only takes up a lot of labor, but also leads to counting errors and secondary contamination.
Our equipment supports a complete connected line solution: macchina per stick pack, disordered pouch sorting machine, and cartoning machine. Finished stick packs are directly conveyed to the disordered pouch sorting machine (Jinlu PA-400 Sorting Machine), which automatically adjusts pouch orientation, counts accurately, and delivers them in order to the cartoning station. The entire process runs automatically, eliminating manual sorting and material handling steps.
The entire production line is designed to fit pharmaceutical production standards and meets cGMP requirements. It forms an integrated closed loop from film forming, filling and sealing to downstream pouch sorting and cartoning, reducing human contact and contamination risk. It fits the needs of pharmaceutical factories upgrading to automated clean workshops.
Film feeding, formazione, riempimento, sigillatura, e taglio: These five core stations are all connected. The five fatal problems exposed by ordinary stick packing machine models on the market, vale a dire, film deviation, sachet packet deformation, poor filling accuracy, seal leakage, and cutting defects, are essentially all caused by shortcomings in station design.
A reliable stick pack packaging solution is not just about outstanding single-machine performance. It must balance stable single-machine operation with downstream automated connection capability.
Stable deviation-correction film feeding, high-precision forming molds, independent servo filling, constant-temperature heat sealing, and servo flexible cutting, paired with a full-line linked solution that connects to disordered pouch sorting and automatic cartoning. The entire equipment set complies with cGMP standards.
It helps enterprises reduce downtime, tassi di rifiuto più bassi, strictly control material loss, and reduce after-sales pressure. It truly delivers clean, continuo, and efficient automated packaging production.
As a professional equipment supplier for stick pack manufacturers like you, we serve customers across food stick pack packaging machines, linee farmaceutiche, and supplement production. Whether you need multilane stick pack capacity, stick sachet packaging flexibility, or specialized sachet stick pack formats, the right equipment design makes all the difference.
If you have been wondering how do stick pack machines work and why some lines run so much better than others, the answer lies in these five station-level details.
Five frequent issues trouble most production lines: offset stick pack film, wrinkled and twisted stick pouches, unstable filling weight, leaking heat seals, uneven cutting lengths. These flaws come from simple station design on ordinary stick packing equipment.
Most basic stick pack machines only have simple film feeding frames without auto correction modules. When production speed rises, tension changes push the film off track, creating irregular multi-lane pouches and large amounts of waste sachets.
Replace single shared power filling structures with independent servo drive for each lane. Jinlu Packing’s servo quantitative filling system hits ±0.02g precision, suitable for multilane stick pack production of powder, granule and liquid materials.
Abandon traditional iron molds. CNC integrated aluminum alloy forming molds conduct heat evenly and resist deformation, making flat, neat pouches for pharmaceutical stick pack packaging machines and easy to clean to meet cGMP rules.
Common heat seal parts lack constant temperature control, leading to uneven pressure and weak sealing. Equip independent constant-temperature horizontal sealing stations to fully stop seepage for honey stick packaging and liquid stick formulations.
Piccolo Fu, Fondatore di Jinlupacking, porta sopra 20 anni di esperienza nel settore delle macchine farmaceutiche. Sotto la sua guida, Jinlu è diventato un fornitore affidabile che integra la progettazione, produzione, e vendite. Petty condivide con passione la sua profonda conoscenza del settore per aiutare i clienti a destreggiarsi tra le complessità del packaging farmaceutico, assicurandosi che ricevano non solo attrezzature, ma una vera partnership di servizi one-stop su misura per i loro obiettivi di produzione.
