Giga Press

Die structure

Tesla's Model Y rear casting dies have four known visible parts:[3][4]

The front casting suggests an identical die layout, with a possible fifth wedging die underneath (process) for the front-facing (car) crash rail mount.[5]

• two large classic main facing dies, oriented vertically with injection from the bottom of the immobile one.
• two smaller side wedging dies, moving in for injection and out for removal.

Metal alloy

Sandy Munro analysed a Model Y casting in 2021 and reported that the casting aluminium alloy used in the large Tesla chassis parts is primarily an aluminium 89.5%‒silicon 8.5% mix, plus several other trace elements, falling within the categorisation of aluminium Association alloy "AA 386":

Components

Vacuum inside the closed mold is achieved using a 4,000-litre tank made by Fondarex in Switzerland.[7]

Molten metal is pumped through heated pipes, and rotary degassing is performed to reduce porosity.[8]

Steps and machinery involved:

• StrikoMelter Melting and Holding Furnace (850 °C)
• Holding oven (~750 - 850 °C)
• Giga Press ("DCM"‒Die-casting machine)
• Quench oil tank
• Mechanical trim press
• X-Ray machine (porosity check)
• Plasma arc trimming.
• Drill and tap (machining)
• Laser scanning (coordinate-measuring machine, CMM)
• Fastener insertion
• Scrap metal shredder (immediate closed loop recycling of aluminium offcuts)
• Vacuum system

Tesla

In 2019 Jerome Guillen indicated that Tesla Automation were working on a "giant, giant, giant machine" to "make full-size cars in the same way that toy cars are made".

In April 2020, Tesla CEO Elon Musk said that Tesla had purchased the two biggest casting machines in the world to cast the Tesla Model Y rear chassis and crash rails. In January 2021, Musk stated that the rear chassis of the Tesla Cybertruck would be produced using a casting machine larger than 8000 tf.[10]

As of October 2021, Tesla had five casting machines installed at Giga Shanghai, two machines installed at Tesla Factory in Fremont, two machines installed at Giga Berlin, and two machines going into Giga Texas—plus foundations in preparation for many additional Giga Press machines.

During May/June 2022, Idra were assembling a 9000 tf Giga Press.[11] , two 9,000 ton presses were available at GigaTexas to cast Cybertruck rears, while Cybertruck front castings are cast on a 6500-ton press that is shared for casting Model Y frames. Total GigaPresses at Texas were two 9,000 ton plus four of the smaller presses.[12]

Fremont

In June 2020, permits for foundations to support the Giga Press at Fremont were issued with Tesla filing permit applications for construction work in preparation for Die-Casting Machine #2 (DCM2) in July 2022. During September 2020 DCM1 started producing trial runs of Model Y castings and DCM2 had been installed.

On 11 March 2021, one of the Fremont presses suffered a fire, caused by molten aluminium igniting hydraulic fluid. No injuries were reported.[13]

Germany

As of July 2020 plans for Giga Berlin included eight 6100 tf die casting machines. (Located at 52.397°N, 13.793°W.)

European Model Y cars have front and rear cast chassis sections. The first two European Giga Press machines were planned to be delivered to Giga Berlin by the start of 2021.[7]

Shanghai

By October 2020, three locally made LK Machinery Impress-Plus DCC6000 machines were undergoing assembly for Model Y production.[14] (Located at 30.872°N, 121.772°W.) As of October 2021, five machines were available.[15]

Texas

For Tesla Model Y car production at Giga Texas beginning in 2022, Tesla began to deploy a single-piece front in addition to the existing single-piece rear casting.[16]

During the night of 18/19 January 2021, concrete foundations for three Giga Press machines were poured at the Giga Texas factory location near Austin, Texas.[17][18] (30.22°N, -97.617°W)

On 21 January 2021 the first Giga Press components started to arrive on site.[19][20][21]

As of 2 February 2021, all major components of the first Giga Press at the Austin site had been craned into place.[22]

On 15 April 2021, components for a second Giga Press started arriving at Giga Texas.[23]

Glovitech

LK Technology delivered one Impress-Plus DCC 6000 machine for Glovitech of South Korea, installed in the Vân Trung Industrial Zone, Việt Yên, Bắc Giang Province, Vietnam.[24] The machine is used for producing large Faraday cages (radio-frequency enclosures) for 5G mobile base stations.[24] The machine was delivered in December 2020, and produced its first castings in March 2021.[25]

Japan

In June 2023 Toyota announced that it was adopting large casting technology for its electric vehicles.[26]

In 2023 Japanese auto parts supplier Ryobi announced plans to cast large electric-vehicle body parts and expects to reduce car body manufacturing costs by 20%.[27]

Volvo

By November 2023, orders had been placed for two 9000-tonnes-force Giga Press machines for a new Volvo electric vehicle factory at Košice, Slovakia.[28]

2.0

In September 2023 Tesla was reported to be considering a single-piece casting for entire underbody of its to-be-announced "small car", an easier task than single-casting their existing, larger models. This required learning how to use larger Giga Press machines, reduce mold design costs, and incorporate hollow subframes. Key innovations include using 3D printing to make cast prototypes with industrial sand.[29]

Making a large metal mold can cost $1.5 million. Typically, multiple iterations and tweaks are required, at great expense.[29]

Binder jet printers build casts out of layers of sand stabilized with a liquid binder at a fraction of the cost of using metal and in a fraction of the time. Hollow elements are created after the cast is made by removing sections of sand added during the casting. Parts cast in sand molds require different aluminium alloys and post-cast processing to meet safety and other requirements. Production casting would continue to use metal casts.[29]

The die cast press would need clamping force of 16,000 tons or more, among the largest in existence (but still significantly lower than a force of forging presses, such as 50,000 ton). This pressure might prevent the use of sand to make hollows. A different type of press would inject molten alloy more slowly that would allow sand cores and produce higher quality castings, although at a slower pace.[29]

In May 2024 Tesla was reported to have put on hold their plans for single-piece casting and sticking with three-piece casting on their current lineup, claimed to be a result of their sales and profits falling.[30]