Sputtering is one of the most precise and reliable methods for applying metallic coatings to three-dimensional surfaces. It works by bombarding a target material — typically a metal such as aluminium, chrome or titanium — with high-energy particles in a vacuum environment. The dislodged atoms then deposit uniformly onto the surface of the component, forming a thin, highly adherent metallic layer.
This process has been used in industrial manufacturing for decades, but the way it is integrated into a production line makes an enormous difference in terms of output quality, efficiency and cost. The distinction between batch metallization and inline sputtering is not simply a question of equipment layout — it reflects two fundamentally different approaches to industrial coating, with measurable consequences for every aspect of production.

How batch metallization works — and where it falls short

In a traditional batch metallization process, components are loaded into a chamber in groups. The chamber is sealed, evacuated and the coating cycle begins. Once complete, the chamber is reopened, parts are unloaded and the next batch is prepared. Between cycles, components often need to be transferred manually to other stations for pre-treatment, priming or top coating.
This approach has significant limitations. Each manual transfer introduces the risk of contamination or surface damage. Cycle times are dictated by the slowest phase of the process. Consistency between batches can vary due to differences in loading density, positioning or ambient conditions. Traceability is limited, and scaling production means either purchasing additional chambers or accepting longer lead times.
For industries where surface quality is a competitive differentiator — luxury cosmetic packaging, pharmaceutical components, automotive trim — these limitations translate directly into higher rejection rates, slower time to market and increased production costs.

What inline sputtering changes

Inline sputtering integrates the metallization process into a continuous, automated production flow. Components move through a series of stations in sequence — cleaning and pre-treatment, primer application, UV base coating, sputtering metallization and UV top coating — without being removed from the line at any stage. Each piece follows the same path under the same controlled conditions, from start to finish.
The advantages of this approach are concrete and quantifiable. Consistency improves because every component is processed identically, with no variation introduced by manual handling or batch-to-batch differences. Throughput increases because the line operates continuously rather than in cycles. Scrap rates fall because defects are detected and addressed within the process rather than at the end of it. And because a single operator can manage the entire line, labour costs are reduced without compromising output quality.

Tapematic PST Line II: inline sputtering at industrial scale

Tapematic PST Line II is built around the principle that inline 3D sputtering and UV coating should be fully integrated into a single automated system. As the company's core platform for cosmetic packaging, pharmaceutical components and other high-precision applications, it processes up to 7,000 pieces per hour with a level of consistency that batch systems cannot replicate.
The modular architecture of PST Line II allows manufacturers to configure the line around their specific production requirements. Modules for cleaning and pre-treatment, primer, UV base coat, metallization, decoration and UV top coat can be combined and sequenced to match the finishing process required for each product. As requirements evolve, the line can be reconfigured or expanded without replacing the entire system — a significant advantage in markets where packaging formats change frequently.
The IDM II — Inline Decoration Module — can be integrated directly into the PST Line II, adding capabilities such as hot stamping, laser decoration and variable data serialization. This means that decoration and metallization happen within the same automated flow, eliminating the need to move components between separate machines and further reducing the risk of handling damage or quality variation.

A compact alternative without compromise

For manufacturers who need the performance of inline sputtering in a smaller footprint, Tapematic PST Line C offers the same technological foundations in a non-modular, single-unit format. It can UV coat and metallize up to 7,000 pieces per hour, handling a wide variety of shapes and formats — not limited to cylindrical components. Thanks to the Tapematic Spray technology, it uses one third of the paint required by conventional systems, reducing both material costs and environmental impact.
PST Line C is particularly well suited to manufacturers entering the inline coating market for the first time, or to production environments where space is a constraint and a dedicated line for specific product families is the most efficient solution.

The case for making the switch

The comparison between batch metallization and inline sputtering ultimately comes down to what a manufacturer values most. If the priority is flexibility in loading — handling very large or irregularly shaped components in low volumes — batch processing may still have a role. But for any production environment where consistency, throughput, traceability and sustainability are the primary drivers, inline sputtering delivers results that batch systems are structurally unable to match.
The shift is not just technological. It is a shift in how surface finishing is understood — from an isolated process step to an integrated part of a precision manufacturing system.