Frequently Asked Questions (FAQ)




About Die Casting

What are the minimum tolerance requirements for certain precision aspects of the product? What is the minimum draft angle, and what about linear and angular tolerances?

The minimum tolerance requirements depend on the size of the product.

For dimensions up to 200mm, tolerances of ±0.1 or better are required.

For dimensions up to 300mm, tolerances of ±0.2 or better are necessary;

and for dimensions up to 500mm, tolerances of ±0.3 or better are expected.

As for draft angles, a minimum of 1 degree is required, but larger angles are preferred for smoother ejection from the mold.

These tolerance specifications are essential to ensure the precision and quality of die-cast products.

What about the lifespan of your die casting mold?

50,000 shots before replacement or refurbishment. If the old die-casting mold reaches the end of its service life, we can replicate a new mold for you free of charge.

What are the differences between cold chamber & hot chamber die casting? (Cold chamber die casting VS hot chamber die casting)

Cold Chamber Die Casting: This method is suitable for materials with higher melting points like aluminum and magnesium. The metal is melted in a separate furnace and then injected into the cold chamber machine. It’s ideal for casting durable and lightweight parts but can be a bit slower due to the need for metal transfer.

Hot Chamber Die Casting: Designed for materials with lower melting points, such as zinc. In this process, the metal remains in a molten state within an integrated furnace connected to the machine. Hot chamber die casting is faster and more efficient for casting smaller, intricate parts, making it cost-effective for high-volume production.

Why are your mold prices higher than those of most other factories?

Our mold prices are fair and reasonable, and we don’t aim to profit excessively from our customers on mold costs. Moreover, for customers with large order volumes, in the event that a mold becomes unusable, we offer the option of creating a new mold at no additional cost. Additionally, factors contributing to the pricing of molds include the strength and material selection in the mold design.

How do you handle sustainable practices in aluminum die casting?

Sustainability is a key consideration in our operations. We prioritize sustainable practices by minimizing waste, recycling materials, and implementing energy-efficient processes. Here at Bian, for the sake of material purity, our company utilizes a central melting furnace for the concentrated melting and refining of recycled materials before their reuse. We enforce strict control measures throughout the aluminum die casting process, including incoming raw material inspections, periodic testing of material composition every two hours, and regular third-party testing.

What certifications do you hold for quality assurance?

We hold several certifications that attest to our commitment to quality and adherence to industry standards. These certifications include ISO 9001 for quality management, ISO 14001 for environmental management, and IATF 16949, which is specific to the automotive industry. These certifications provide B2B clients with confidence in our processes and our ability to consistently deliver high-quality products.

What are the advantages of aluminum die casting?

– High precision and tight tolerances

– Efficient production of complex shapes

– Lightweight and durable

– Excellent heat dissipation

– Corrosion-resistant

– Cost-effective for large quantities

What alloys are commonly used in aluminum die casting?

Common alloys include ADC12, A380, and A383. We choose alloys based on the specific needs of our clients, ensuring the best properties for their applications.

Can you assist with design optimization for manufacturability?

Yes, our expert team provides Design for Manufacturability (DFM) services to our clients. We collaborate on designs to ensure efficient production, reducing costs and time to market.

What testing devices do you use for die-cast products?

Our workshops are equipped with comprehensive sets of facilities from die-casting to final inspection. Including:

Coordinate measuring machine (CMM), direct reading spectrometer, aluminum liquid hydrogen measuring instrument, X-ray non-destructive testing system, air-tightness testing equipment / vacuum chamber helium leak detection device, full phase microscope, torque testing system, maximum thread failure torque testing, paper tape, colorimeter, film thickness gauge, automated cleanliness extraction & analysis system, etc.

About CNC Machining

What is CNC machining, and how does it complement the die-casting process?

CNC machining stands for Computer Numerical Control machining. It’s a highly precise manufacturing process that complements die casting by allowing for fine-tuning, shaping, and post-casting modifications of die-cast parts. CNC machining ensures parts meet tight tolerances and specified dimensions, enhancing their overall quality and functionality.

Can CNC machining be used for both aluminum and zinc die-cast parts?

Yes, CNC machining is versatile and applicable to both aluminum and zinc die-cast parts. It offers the flexibility to fine-tune and modify parts made from various materials, ensuring they meet specific project requirements.

Can CNC machining help in achieving tight tolerances for critical die-cast parts?

Absolutely, CNC machining is the go-to solution for achieving tight tolerances in critical die-cast parts. Its computer-controlled precision ensures parts conform to exact dimensional requirements, even for demanding applications in industries like aerospace and automotive. CNC machining enhances the quality, reliability, and performance of these precision components.

What types of CNC machining operations are available for die-cast parts?

CNC machining encompasses various operations, including milling, turning, drilling, and surface finishing. These operations can be tailored to meet specific design and functional requirements for die-cast parts.

How does CNC machining contribute to reduced lead times in die-cast part production?

CNC machining significantly contributes to shorter lead times by offering rapid setup, efficient tool changes, and high-speed cutting capabilities. This agility allows for quick adjustments in production schedules and accommodating urgent orders, making CNC machining a key factor in meeting tight project timelines.

Are there any material restrictions when it comes to CNC machining for die-cast parts?

CNC machining is versatile and compatible with a wide range of materials commonly used in die-casting, including aluminum, zinc, magnesium, and more. Material selection depends on your project’s specific requirements, and CNC machining can accommodate various materials with ease.

Can CNC machining be applied to produce prototypes of die-cast parts?

Yes, CNC machining is an excellent choice for producing prototypes of die-cast parts. Its ability to quickly and accurately machine parts makes it ideal for testing and validating designs before committing to mass production. This reduces the time and costs associated with creating physical prototypes.

What design considerations should be taken into account when planning CNC machining for die-cast parts?

Design factors such as material selection, tolerances, part complexity, and the desired surface finish should be considered when planning CNC machining for die-cast parts. Collaboration with experienced engineers can help optimize designs for efficient CNC machining.

How do you ensure consistency in CNC machining quality for die-cast parts?

We maintain quality consistency through rigorous process control, employee training, and adherence to industry standards. Our advanced measurement equipment verifies dimensions and shapes, ensuring each machined die-cast part meets specified requirements.

About Finishing Services

What is the purpose of finishing services in die casting?

Finishing services play a crucial role in improving the overall quality and appearance of die-cast parts. They are essential for achieving the desired surface finish, texture, and color, making the parts more visually appealing. Moreover, finishing processes enhance the corrosion resistance and wear resistance of die-cast components, ensuring they can withstand harsh environmental conditions and extended usage. By removing any imperfections and rough edges, finishing services contribute to precise dimensions and tight tolerances, making the parts function seamlessly in their intended applications.

What are some common finishing options available for die-cast parts?

Various finishing options are available for die-cast parts, catering to different aesthetic, functional, and environmental requirements. Some of the most common finishing methods include powder coating, anodizing, plating, painting, and CNC machining. The choice of finishing method depends on the specific needs and desired outcomes for die-cast parts.

Can finishing services improve the longevity of die-cast parts used in challenging environments?

Yes, finishing services can significantly extend the lifespan of die-cast parts in demanding conditions. Options like anodizing and powder coating provide exceptional resistance to corrosion, chemicals, and UV exposure, making them ideal for parts exposed to harsh environments.

How can I choose the right finishing method for my die-cast parts?

Selecting the right finishing method depends on factors like the part’s intended use, desired appearance, and environmental conditions. Our experts can provide guidance based on your specific requirements, ensuring you choose the most suitable finishing option for your project.

How can I request a quote for finishing services for my die-cast parts?

Requesting a quote is easy. Simply reach out to our team with your project details, including the type of parts, quantity, desired finishing method, and any specific requirements. We’ll promptly provide you with a comprehensive quote tailored to your needs.

How does powder coating benefit die-cast parts?

Powder coating provides die-cast parts with a durable, corrosion-resistant finish. It also offers a wide range of color options.

What is anodizing, and why is it used in die casting?

Anodizing is a surface finishing process widely used in the die casting industry, especially for aluminum components. It offers several key benefits, making it a preferred choice:

1) Enhanced Corrosion Resistance: Anodizing forms a protective oxide layer on the surface of aluminum parts, significantly improving their resistance to corrosion and environmental damage.

2) Improved Aesthetics: Anodized die-cast components have an attractive, uniform finish. This finish not only enhances the appearance of the parts but also helps maintain their look over time.

3) Increased Durability: The anodized layer is harder and more durable than untreated aluminum, making it ideal for parts that may undergo wear and tear.

4) Electrical Insulation: Anodized surfaces provide electrical insulation, a crucial feature for components used in electronic applications.

5) Better Paint Adhesion: Anodizing improves the adhesion of paints and coatings, making it easier to achieve the desired finish on die-cast parts.

6) Custom Color Options: Anodizing offers a wide range of color choices, allowing die casting companies to match the components with specific design and branding requirements.

Can you customize the finishing options for my die-cast parts?

Yes, we offer customizable finishing solutions to meet your specific requirements.

About Quotes, Orders, Shipping, etc.

How could I get a quotation?

What is your payment terms?

What is your payment terms?

Usually T/T, irrevocable L/C at sight.

What is your terms of delivery?

EX factory,FOB, CIF etc.

What is the lead time?

It usually takes 25 to 35 days after sample confirmation and receiving your deposit. The specific delivery time depends on your designs and the quantity. For unconventional and complex product , we have to consider extra 15-30days for tooling/mold made.

What's your MOQ?

No MOQ for the first three times order. You can test the quantity and launch the market better.Later MOQ 500pcs for normal products and 1000pcs for small size product.

How to solve the quality problems after sales?

Take photos of the problems and send them to us. We will make a satisfied solution for you within three days after we confirm the problems.

What about the mold guarantee lifetime?

Mold life span depends on your order quantity, generally the mold range from 60k~100k shoot,.In addition we could supply free mold if it exceed life span for your large quantity.