ISO and IATF 16949 quality certified die casting company in China. Fast lead time, compatitive price, and high-quality guarantee,
Qu'est-ce que le moulage sous pression pour l'automobile ?
In its simplest terms, automotive die casting is a manufacturing process where molten metal is introduced into a die to create a part that solidifies in a fraction of a second. As the process unfolds, the metal comes in, the part is formed, and then it is processed down the line. It is high-speed, high-precision, and incredibly efficient for mass production.
There are two main types of this process:
Pressure Die Casting (PDC): Where molten metal is injected under high pressure into a steel mold. According to the North American Die Casting Association (NADCA), this remains the fastest way to produce complex non-ferrous metal parts.
Moulage sous pression par gravité: Where molten metal flows into the mold due to gravity. This is often used for parts where the mechanical properties of a slower solidification are preferred.
Automotive Die Casting Manufacturing in China
- Automotive Die Casting Products In Aluminum alloys, Zamak alloys, Magnesium alloys.
- Automotive Die Casting CNC machining, post-manufacturing and Secondary Processes.
- In-house Engineering & Die Casting Tooling Manufacturing for auto parts
- Quality Assurance and Control with ISO & IATF 16949 Quality Systems.
- Auto Die Casting Surface Finish including powder coating, Anodizing, Painting, E-coating, PVD coating, etc.
Choosing the Right Alloy for Automobile Die Castings
When a new customer comes to us, we look at tolerances, part size, and various features to pinpoint the right alloy. Here at The Die Casting, we have the ability to cast all three main alloy types, ensuring that we match the material to the specific application:
- Aluminium: This is sort of the go-to. It provides the best overall value of properties and economics. It has excellent thermal conductivity properties to get the heat out of electronics.
- Magnésium: If it’s something that is going to be in a very weight-sensitive application and you need very, very light weight, we suggest magnesium. It offers an incredible strength-to-weight ratio and is excellent for headlamp ballasts.
- Zinc: A heavy alloy, about two and a half times heavier than aluminum. However, you can do thinner walls and less draft, and the tool life is much, much better in zinc.
High-pressure die castings have ever-increasing use in automotive manufacturing processes and technology. With the increasing amount of electronics and passenger cars and trucks, there is a much greater need for mechanical type systems that can dissipate heat, add structural integrity, and other factors that make high-pressure die castings a very popular product and components for the automotive sector. This guide explores the secrets of the trade, explaining why automotive die casting is a major leap over traditional methods.
Automotive Aluminum Die Casting in the Era of Electric Cars
The future of the car industry will be pure battery electric vehicles. In this new era, automotive moulage sous pression de l'aluminium is essential because the powertrain looks completely different. In the vast majority of electric vehicles, there is only one gear, so the gearbox is much smaller and less complicated.
However, we have some new parts that come with e-mobility. The inverter on top contains a lot of electronic components and needs to be completely pressure tight. We cannot accept any leakage; while oil leakage in an internal combustion engine is not nice, water leakage can kill the motor of an electric car once it’s filled with water. Therefore, automotive aluminum die casting must meet the highest standards of structural integrity.
Why Partner with CNM Casting?
In this session, we discussed centrifugal casting, investment casting, and die casting. We love working with die castings and talking to customers about their new applications. If it’s not a good fit for a die casting, we will help you find the right process that fits your part.
At thediecasting.com, we provide the technical experience needed for the ever-increasing amount of electronics in the automotive world. Whether you need high-strength automotive aluminum die casting or an intricate structural automobile die casting, we will give you an honest opinion and help you get the part to an ideal solution.
Die Casting Manufacturing
Install a aluminum die casting tooling on the die-casting machine, and spray lubricant to the cavtiy and core side (release agent) to control the mold temperature and facilitate demolding. We have aluminum die casting machines from 120 to 1250 tonnages
Casting Runner Trimming
The main methods for removing gates (runner) from die castings include in-mold cutting, stamping tooling with a dedicated edge trimming machine, sawing, or robotic cutting. Depending on the complexity and material of the casting, automated mechanical stamping is the mainstream choice to ensure efficiency and surface quality.
Die Casting Deburring
Manual or robotic methods, along with grinding wheels and files, are used to perform fine polishing on specific or complex areas. Sometimes, robots are used to hold the cutting tool or grip the workpiece to automatically remove complex burrs from the surface and openings.
Die Casting CNC Machining
After cleaning, the die-cast parts are fixed on the fixture of a CNC machine tool. According to the programming code, they are milled, drilled, tapped or turned to produce high-precision holes, threads or planes, solving the complex features that die casting cannot directly form, at CNM Casting, we always adapt to new technologies in this sector to introduce these advancements to our clients.
Die Casting Surface Finish
The surface treatment process for die-cast parts mainly includes: pretreatment (degreasing, rust removal, grinding/polishing/sandblasting), pretreatment cleaning, and core surface treatment (such as anodizing, powder coating, spraying, electrophoresis, electroplating, and passivation). The purpose is to remove casting defects, increase surface hardness, improve corrosion resistance, and enhance aesthetics.
Final Inspection and Packing
After die casting, the process includes gate and flash removal, preliminary cleaning, visual and dimensional inspection, surface treatment, finished product marking and traceability, cleaning, final inspection, protective packaging, and warehousing. The focus is on ensuring surface quality and dimensional accuracy meet requirements, and preventing bumps and scratches during transportation to achieve high-quality, traceable product delivery.
Producing Complex Automotive Die Casting Parts
Automotive die casting parts run from “head to tail” in a modern vehicle. Because everything you do to reduce weight helps fuel economy and reduces emissions, these components are vital.
Power Electronics and EV Housing
Electric vehicle electronics generate heat, and you want to get that heat out. We use automotive aluminum die casting for:
- TCM Modules: Transmission control modules for shift-by-wire systems.
- EV Enclosures: Large housings that need to be a leak-free product to prevent water intrusion.
- EMI/RFI Shielding: Die castings inherently protect electronics from interference compared to plastics.
Structural and Mechanical Die Casting Automotive Parts
- Shock Towers: High-pressure castings that replace sheet metal assembly and welding, increasing rigidity.
- Motor Housings: Which stay a big portion of the die casting business as we switch to electric mobility.
- Battery Boxes: Large parts that are now being cast as a single piece to ensure they stay watertight.
Investment Casting and Automobile Die Castings
When die casting automotive parts require very high dimensional accuracy or represent a small and intricate design, we may look at Investment Casting, also known as the Lost Wax Method.
Manufacturing Excellence: Cold Chamber vs. Hot Chamber
In automotive die casting, the way metal is introduced into the die is critical to the quality of the final part.
Moulage sous pression à chaud
Used for zinc and magnesium, the injection systems are actually physically inside the molten metal. A plunger comes down, extracts a given amount of material, and pushes it into the die. It’s a very fast process, sometimes it looks like popcorn coming out because it cycles so quickly.
Moulage sous pression en chambre froide
Typically for aluminum, the metal is in a separate furnace. A ladle picks up a predetermined amount of liquid and puts it into the shot sleeve. This prevents the molten aluminum from attacking the plunger mechanisms.
Value-Added Processes: Beyond the Casting
At thediecasting.com, we love doing engineering and technical experience work. We look at the overall application to see if we can combine parts into a single die cast part to reduce costs.
- In-house CNC Machining: We have the ability to handle a very wide range of machining, from simple drill/tap stations to complex 5-axis work.
- Leak Testing: For parts that need to be leak-free, we set up pressure decay leak testing. We inject the part with air and measure the amount escaping to confirm we ship a leak-free part.
- Traitements de surface: We apply various surface treatments and different finishes, from vibratory deburring to high-level corrosion protection.
Sourcing from Automotive Die Casting Manufacturers in China
For global manufacturers, sourcing from automotive die casting manufacturers in China provides a significant advantage. At CNM Casting, we take pride in the fact that we help you get your “most bang for the buck” with a die casting. Our China-based facility allows us to be highly competitive on part price because we prioritize engineering efficiency.
Modern automobile die castings in China utilize AI-driven vacuum die casting. A vacuum is applied to remove air, which reduces porosity and improves strength and surface quality. This allows us to offer suggestions that might help save the customer money by doing features “as cast” rather than through secondary machining.
Further technical resources can be explored at diecastingschina.com et aludiecasting.com.
Automobile
L'industrie automobile fait largement appel aux services d'usinage CNC pour obtenir des pièces durables et précises, qu'il s'agisse de composants de moteur ou d'accessoires personnalisés. En tant que fabricant leader de services d'usinage CNC, nous veillons à ce que chaque pièce contribue à la sécurité et aux performances des véhicules.
The fact that we can provide components that are not only light in weight but strong, als0 can contribute towards more fuel efficient and with less impact on the environment.
The 2026 “Giga” Revolution
The industry has moved far beyond small brackets. Today, we pinpoint whether high-pressure die casting is the right process to combine parts into a single die cast part to save the customer money. We are fighting for the whole industry so that more and more parts come into high pressure die casting. This is especially true for the complete rear underbody or front underbody, which are now being cast in one single shot on machines reaching up to 9,000 tons of locking force. This “megacasting” trend is significantly reducing the carbon footprint of vehicle assembly, as noted by Automotive News.
FAQ
What industries benefit the most from CNC machining services?
L'usinage CNC est applicable dans plusieurs industries en raison de sa notoriété et de son caractère pointu sur le marché. Nos services sont divisés en plusieurs catégories, principalement l'aérospatiale, l'automobile, l'électronique, le médical et l'équipement industriel, que l'on peut trouver sur TheDieCasting.com. Par exemple, l'industrie aérospatiale a besoin d'éléments très résistants tels que des pales de turbines et des pièces de structure qui nécessitent une tolérance étroite. Machines CNC.
De même, l'industrie automobile fait grand usage de ce procédé, car les pièces de moteur et les accessoires personnalisés nécessitent un usinage CNC pour des raisons de durabilité et de précision. L'industrie électronique utilise l'usinage CNC pour les petites pièces telles que les connecteurs et les boîtiers, car les petits objets nécessitent une plus grande précision pour la fabrication d'appareils complexes. Les instruments utilisés pour la chirurgie, les articulations artificielles et les produits de diagnostic dans la recherche médicale doivent être très précis. La durabilité exige des matériaux résistants qui s'appliquent également aux équipements industriels et que l'usinage CNC peut réaliser. Ces industries croient en la technologie CNC car elle permet de produire des pièces avec une efficacité et une sécurité optimales.
Which materials can be used for CNC machining?
L'usinage CNC peut s'adapter à une grande variété de matériaux, ce qui signifie que les fabricants le considèrent comme une option pratique. Chez TheDieCasting.com, nous traitons un grand nombre de métaux, de plastiques et de matériaux composites. Par exemple, l'aluminium, l'acier inoxydable, le titane, le laiton et le cuivre, entre autres, sont souvent choisis pour leur solidité et leur durabilité. Les matériaux organiques tels que l'ABS, le nylon, le polycarbonate et le PEEK constituent des boîtiers idéaux lorsque des facteurs tels que le faible poids et la résistance à la corrosion jouent un rôle important. De même, les composites tels que le CFRP sont appropriés car plusieurs industries exigent des pièces de la meilleure qualité à partir de matériaux légers avec une résistance supérieure. L'équipe de The Novo Wire Company offre à chaque client des services de conseil dans le choix du matériau approprié pour un projet donné, en fonction de caractéristiques telles que la résistance, le poids, le coût et l'utilité.
What is the average response time for CNC machining projects?
The lead time in producing CNC machining projects is also influenced by issues to do with complexity, the quantity of parts that are to be produced, and material type. Like any good die-casting company here at TheDieCasting.com, a fast turnaround time is important without sacrificing quality. In the initial stages, normally, design and planning happen; here, we look at the client’s design for manufacturing and then agree on the price to be charged. This stage normally lasts a couple of days.
After that, there is approval for production to start. Small runs of prototypes may take a couple of days, and larger production runs may take a few weeks, depending on the extent of the project requirement. As we mentioned earlier, after manufacturing, each part is subjected to various quality control checks to meet the client’s requirements before dispatch. Through this, we are always open and give clients an accurate period to complete their projects, thus keeping them attending to their plans effectively.
How TheDieCasting.com controls the quality of the CNC machined parts?
Le site Web Die Casting fait de la qualité sa principale valeur commerciale. Nos solutions d'usinage de précision s'appuient sur un processus d'assurance qualité complet qui comprend plusieurs étapes. Cette technique permet de garantir la précision des dimensions et des tolérances sur les pièces concernées, grâce à l'utilisation d'outils de métrologie avancés, notamment les MMT. Nous effectuons également des essais sur les matériaux pour confirmer qu'ils répondent aux normes de résistance, de durabilité et de performance requises.
Also, the performance of our machining processes is continuously supervised with the help of automated systems for the following purposes: identification of deviations from the required parameters and correction of these deviations in real time. Each subassembly and component is inspected for conformance with the client’s precise requirements before the product is claimed to be ready for delivery. These meticulous measures ensure that our CNC machining services consistently deliver parts of superior quality.
What does distinguish TheDieCasting.com from other providers of CNC machining services?
TheDieCasting.com dispose d'un avantage concurrentiel exceptionnel grâce à son professionnalisme, à ses applications technologiques de pointe et à l'attention qu'elle porte à ses clients. Grâce à nos années d'expérience dans le secteur, nous nous sommes forgé une réputation de fabricant de services d'usinage CNC fiable, capable de gérer des projets complexes et exigeants. Notre investissement dans des équipements avancés d'usinage à grande vitesse nous permet de rester à la pointe des tendances de l'industrie et de fournir des résultats exceptionnels.
Contrairement à de nombreux fournisseurs, nous adoptons une approche hautement collaborative, travaillant en étroite collaboration avec nos clients pour comprendre leurs besoins uniques et fournir des solutions d'usinage de précision sur mesure. Qu'il s'agisse de conseiller sur le choix des matériaux ou de trouver les meilleures solutions de conception pour la production, nous ne ménageons aucun effort pour satisfaire nos clients. En outre, notre capacité à fournir des services d'usinage CNC efficaces et rentables en Chine nous positionne comme un partenaire privilégié pour les entreprises du monde entier. En d'autres termes, nous intégrons les capacités techniques à la qualité et à l'innovation afin de tenir nos promesses à l'égard de nos clients.