Die Cut Tape Parts on Liner for Automated Assembly

Application notesPublished 07 November 2026Updated 07 November 2026

Automated placement of die cut tape parts depends on four conditions agreeing at once: the parts ride on a continuous liner, the waste matrix is gone, the pitch indexes to the feeder, and the release level sits inside the window the vacuum head trusts. The part drawing describes one of those four. The other three are converting decisions, and they are the reason a liner-fed component is bought from a converter rather than from a catalogue.

Two lines, described without names

An electronics assembly plant in the Pearl River Delta closes battery modules with small insulation and thermal pads. A bench-top picker lifts each pad from a liner strip and sets it into the pack housing before the lid goes on; the operator's complaint during trials was never the pad, it was strips that advanced two pitches or shed a corner of waste matrix into the tray.

A second build, at a harness and enclosure operation in northern Vietnam, places gasket pads on housing frames through a simple pneumatic press with a manual index. There the format question reversed: the same outline that ran perfectly on a heavy glassine was draggy to peel by hand from a stiff PET liner, and the station's rhythm, not the adhesive, decided which liner was right.

Neither story has a result number, because the outcome belonged to the line, not to us. What travels between both stories is the checklist.

What loads the part between cutting and placing

A liner-fed part survives a journey the drawing never mentions. At the pick, a vacuum head applies acceleration and a small peel at a speed no hand matches; release that an operator would not notice becomes a double-lift or a tilted part. Between stations, the strip sees room temperature and humidity, the static of its own liner, and the set it takes on the reel during storage and transit, which curls a thin film strip away from the table. Between delivery and use there is dwell time: adhesive relaxes into the liner's coating and release creeps upward with age and warmth, so a format qualified on a March reel is not automatically qualified on an October one. Cut edges matter more than on hand-fed parts because a lifted fibre or a whisker of matrix is exactly what a small-diameter cup picks up and carries onto a bond line.

The five things we review before quoting

One: supply format. Strip width and core, wind direction and face orientation, parts per metre, whether the feeder indexes on sprocket holes, edge guidance or a cut track. Two: liner and release. PET film or glassine, at a release level quoted with its test method and judged against the head's dwell and peel speed, not against a general grade. Three: matrix state. How the waste leaves a small part at tight pitch — stripping, bridge width, micro-perforation or laser removal — agreed on the actual geometry. Four: part condition at the edge. Cut route selected so the edge signature matches what inspection can defend, with corner lift and adhesive squeeze-out treated as drawing items. Five: records and packing. Batch tied to incoming material and cut date, reel packaging that survives the shipping leg from Shenzhen, and a change-notification term covering film, coat, liner and route.

How the format gets produced

The stack is laminated first where the part is multi-layer, then cut on the route the geometry asks for: rotary for continuous roll-fed webs at steady volume, flat-bed with engineered strippers for complex outlines and thicker builds, laser where the design is still moving or the matrix is ablated rather than pulled. A die cut tape part destined for a head is really two products, the part and the strip that carries it, and both are made here. The liner strip itself is slit here; widths below 10 mm are feasible on most materials once thickness, coat and edge requirements pass review, which is stated in the slitting route rather than assumed. Prototype quantities are available and production quantities are agreed per part, with timing confirmed at quotation once the drawing and the format are both fixed. The die-cutting page carries the route list and the inspection commitments.

What to send us

Send the part drawing or a sample, and next to it the delivery evidence: a photo or spec of the feeder, the current reel if one exists, the head type and how it lifts, and the storage the reel sees between goods-in and the station. Name the surfaces the part touches and the environment the assembly lives in afterwards. If the format is still open, say so; a converter who reviews the placement method alongside the outline usually saves a tooling round, and a die cut tape supplier who quotes the geometry without asking how the part arrives is selling a different product than the one the line needs.

Write to yantian0606@gmail.com or message on WhatsApp at 8613554863137 with the drawing and a picture of the station, and we will come back with a format proposal, the route, and the five review answers in writing. Start from the die-cut parts overview if the part is not yet drawn.

Commercial and process terms on this page are the questions a converter has to answer, not a standing offer. Order quantities, lead times, tooling charges, sample terms, freight and payment structures are confirmed at quotation against your drawing, your material and your destination, and only figures already published elsewhere on this site are stated as commitments.