Two crate formats that look similar on a spec sheet behave very differently in the tool — one is about pressure and hygiene, the other about hinges and mechanism steel.
Quick answer: A 24-bottle beverage crate runs about 20 s on a 650 t machine with a 1.2344 hot-runner tool, while a foldable crate runs 15–20 s on 650–1,800 t depending on size, with hinges and latches planned during DFM. Both need food-contact documentation for EU sales; both are built as single-cavity tools on the one-cavity crate production line model.
Beverage crates: hygiene at 20 seconds
A 24-bottle beer or soft-drink crate is roughly 400×300×300 mm and 1.2–1.8 kg. It must resist sugar and acid residues, survive brewery chillers and bottling conveyors, stack securely when wet and work on automated sorters. The part is specified around food contact first: food-grade PP or HDPE, an EU 10/2011 declaration of compliance, and washability without trapped moisture.
In the tool, that means a 1.2344 (H13) hot-runner mold with high-conductivity inserts in the core and a valve-gated melt delivery that avoids gate marks on visible faces. DKM’s beverage crate line runs these crates at a 20-second cycle on a 650 t machine — fast enough that cooling, not fill time, sets the pace.
Foldable crates: mechanisms decide the tool
A foldable crate in the 500×300×120 mm or 400×300×160 mm class collapses for return transport, which is why logistics operators like it: DKM reports a 70% reduction in empty return volume. The material is usually UV-stabilized PP or HDPE rated from −40 °C to 80 °C, and the hinge is the part that fails if the tool is wrong.
That changes the mold: sliders and lifters for hinges and latches, sequential ejection, and steel that holds mechanism detail over millions of cycles. DKM specifies DIN 1.2344 for its foldable tooling, a 12–20 s cycle, mold life of 1–2 million shots and a hinge structure tested to 20,000 folds. Machine size depends on the part: 650–1,800 t, calculated from projected area and rib density. The foldable crate line documents the configuration.
What the two formats share
Both are large, thin-walled, single-cavity parts. Both need a hot runner, directed cooling and a take-out robot that works inside the mold-closed time. Both carry food-contact obligations if they touch food or beverages, and both are affected by the EU PPWR: from 1 January 2030, 40% of listed transport packaging — crates included — must be reusable, and 100% on own-site and same-Member-State routes.
Where each line fits
|
Format |
Typical size |
Part weight |
Machine |
Cycle |
|
Beverage crate |
400×300×300 mm |
1.2–1.8 kg |
650 t |
20 s |
|
Foldable crate |
500×300×120 / 400×300×160 mm |
1.5–2.5 kg |
650–1,300 t |
15–20 s |
|
Fish and produce crate |
600×400×200–300 mm |
2.0–2.8 kg |
650–850 t |
25–35 s |
The fish and produce format sits between the two: like a beverage crate it needs food approval and good drainage, and like a foldable crate it needs strong stacking ribs. All three run one cavity per mold; the differences live in wall section, cooling and mechanism detail, not in cavity count.
What to specify
· Food contact: EU 10/2011 declaration of compliance; EU 2022/1616 for recycled content.
· Hinge or stack test: define the test protocol and cycles before quoting.
· Cycle and OEE: put both numbers in the contract, not just tonnage.
· Mold life and spares: agree the shot rating and a spare mechanism set.
· Steel and hot runner: brand, grade and drop count in writing.
About DKM (Sino Group)
DKM Machinery, part of Sino Group, builds fast-speed injection molding machines and turnkey crate lines in Taizhou, Zhejiang, China: 24+ years in crate production, 1,500+ crate molds and machines, SinoMould tooling and UL 508A-certified machines. See the beverage crate line, the foldable crate line and SinoMould crate moulds.
DKM Machinery
About Author
