A 2000-ton class cold chamber high pressure die casting machine is the current workhorse for ultra-large aluminum structural parts, and Zitai's ZDC-2000TCM specifies 2000 ton clamping force with a maximum net shot weight of 30.3 kgf at the largest Ø150 mm plunger tip [S1][S4].
Shibaura Machine's HPDC range extends from 1350 to 35000 kN (roughly 135 to 3500 metric tons), with a 2000-ton model on the standard tonnage list alongside 100, 250, 500, 800, 1000, 1500, 2500, 3000, and 3500 [S2]. The two data sets, Chinese OEM and Japanese-OEM, bracket what a process engineer should expect when sourcing a 2000-ton cold chamber machine for EV battery trays, chassis frames, or telecom base-station castings.
Shot Weight Is a Plunger-Diameter Decision, Not a Tonnage Decision
On the ZDC-2000TCM, net shot weight scales almost linearly with plunger tip diameter: Ø120 mm gives 19.4 kgf, Ø130 mm 22.8 kgf, Ø140 mm 26.4 kgf, and Ø150 mm 30.3 kgf of aluminum [S1][S4].
Plunger stroke is fixed at 1100 mm and plunger tip penetration into the cold chamber at 550 mm, so shot weight is a volume calculation multiplied by the alloy density the foundry actually runs [S1]. A die caster quoting a 2000-ton press for a 25 kg casting is making a plunger-diameter choice (Ø140 mm at 26.4 kgf in this case) and an alloy choice, not a tonnage choice.
Casting Pressure Trades Off Against Projected Area
The same Zitai spec sheet shows the inverse relationship every die caster memorizes: larger plunger = more metal per shot, less pressure per cm² [S1]. Casting pressure drops from 971 to 1237 kgf/cm² at Ø120 mm, to 622 to 792 kgf/cm² at Ø150 mm, while projected casting area grows from 2059 to 1617 cm² up to 3217 to 2527 cm² [S1][S4].
Max shot speed on this class is rated at 6.0 m/s, with a shot force of 110 to 140 ton and a max intensified injection pressure of 289 to 368 kgf/cm² in the hydraulic system [S1][S4]. For thin-wall structural castings, the foundry typically picks the smaller plunger for higher intensification; for thick-walled or large projected-area parts, the larger plunger keeps the intensification ratio on the die surface manageable.
What 2000 Ton of Clamping Force Actually Buys
Die platen dimension on the ZDC-2000TCM is 1950 × 2170 mm, with 1350 × 1350 mm tie-bar spacing, Ø280 mm tie bars, die stroke 1400 mm, and die height 650 to 1600 mm [S1][S4]. That envelope fits a single-piece EV battery tray or a large rear underbody casting in one shot rather than joining two smaller castings.
Ejecting force is 65 ton with 300 mm stroke, die adjustment speed is 66 mm/min at 50 Hz (79 mm/min at 60 Hz), and the full machine weighs 140 ton at 13645 × 5679 × 5275 mm overall [S1][S4]. The 2000-ton number is the lock force that resists die opening under injection; the 1350 × 1350 mm tie-bar clearance and 1600 mm max die height are the constraints that decide whether your die fits at all. For more on how die casting machine selection cascades from part geometry rather than tonnage, the Luxue model guide flags exactly this point: passing only the tonnage calculation does not confirm shot capacity, die fit, or cycle time [S8].
Where 2000-Ton Cold Chamber Sits in the Alloy Matrix
Cold chamber is the correct process for aluminum, magnesium, and brass; hot chamber is reserved for zinc and low-melting alloys because the shot sleeve stays immersed in the melt [S5][S6]. The 2000-ton class sits at the upper end of standard HPDC tonnages, with Shibaura offering 100 to 3500+ metric tons in cold chamber servo-hydraulic configuration [S2], and Chinese suppliers such as Zitai clustering the 2000-ton class around EV megacasting and large structural parts [S1].
For aluminum die casting machine work, the 2000-ton platform is where the industry landed for single-piece rear underbody and battery-tray castings; for magnesium, the same tonnage supports large thin-wall structural parts but with stricter melt-handling controls. The ZDC-2000TCM spec sheet does not list a magnesium-specific configuration; it is presented as an aluminum cold chamber machine for structural EV and industrial castings [S1][S4].
Throughput, Cycle Time, and the Numbers That Drive ROI
Die cooling water flow on the ZDC-2000TCM is 150 to 200 L/min through the die circuit, with an additional 250 L/min hydraulic cooling loop at 25 °C water temperature, and cycling oil volume of 2296 L [S1][S4]. Pump motor capacity is 60.5 kW × 2 sets (one source lists 56.25 kW × 2) with 254 kVA total installed power at 220/380/415 V 50/60 Hz [S1][S4].
Typical HPDC production rates run around 500 parts per hour, and the limiting factor at 2000-ton class is usually die cooling and part extraction, not the machine's hydraulic cycle [S3]. For a part that fills, intensifies, and ejects in 20 to 40 seconds, the 2000-ton press becomes the bottleneck only when die cooling is under-specified. The reference on case packing machine suppliers covers similar capital-equipment sourcing logic, and the same OEM/dealer/rebuilder split applies to 2000-ton HPDC procurement.
Sourcing and Specification Watch-Outs
The first watch-out is shot weight versus projected area, not versus tonnage: a 30.3 kg shot is only useful if the part geometry can be filled at the 622 to 792 kgf/cm² pressure the Ø150 plunger delivers [S1]. The second is that 2000-ton clamping force is necessary but not sufficient: 1350 × 1350 mm tie-bar spacing, 1600 mm max die height, and 1400 mm die stroke set the real envelope, and the Luxue spec catalog flags this explicitly [S8].
Track two signals through 2026: (a) Chinese OEM datasheets converging on 6000 to 9000-ton clamping force for next-generation megacasting, which will push 2000-ton class down into Tier 1 structural-part work; (b) servo-hydraulic versus hybrid injection adoption on existing 2000-ton platforms, since Shibaura's servo-hydraulic injection is now standard across its 135 to 3500 ton range [S2]. A useful cross-reference is how process-control choices downstream, like the output standard on a 0.5-4.5 V ratiometric vs 4-20 mA decision, mirror the same kind of locked-in specification decisions a die caster faces when picking plunger diameter.