Quality Control

Quality Control System

Learn how Huayin Die Casting maintains the highest quality standards in the production process, we integrate quality control into every step, from raw material selection to final inspection, to ensure superior prototypes and parts.

In production
Final test

Technical assessment

Before the production stage begins, our engineering team performs a technical assessment on your parts design. This includes an assessment on important factors such as material, surface finish, structure, process, and other details of your 3D and 2D drawings.

Material verification

On our customer’s request, we provide a certification of the material we used for making your parts. The report comes from the raw material manufacturer and usually includes: material heat number, material grade, material dimensions, mechanical properties, chemical analysis, etc.

On-site inspection system

In precision machining, it is important that materials being worked on is always at the right position. With on-site inspection system, positions are examined automatically, and adjustments are made accordingly. Using on-site inspection system further helps avoids issues at the early stage, saving cost and time.

In-process quality control

At RapidDirect, we strictly obey the ISO9001:2015 requirements. The quality control staff conducts routine inspections for all parts that are being produced every 2 hours. This further prevents risks from happening.

Full-dimensional inspection report

For all orders, we provide full dimensional inspection report on request. This report will include the following: quantity of parts, critical dimensions, threads and tolerances, thicknesses and depths, part appearance, etc.


Ensuring that the parts we manufacture are of the highest quality is important. We know about the unpredictability of logistics. Therefore, we make sure we lower the risk to the parts during our packaging process. Four layers of protection: 1. wrapping paper 2. EPE 3. foam 4. paper/wooden box are applied during the packaging process, ensuring that we deliver the most high-quality and beautiful parts to you.

Perfect Supply Chain Management System

We carefully select the suppliers that we cooperate with, and strictly control every level from

inspection, procurement, distribution, sample review, warehousing, and shipment out to ensure that they have the available materials we need and are of high quality.






Shipment out

State-Of-The-Art Facilities

To facilitate our strict quality control protocols, our production facilities feature dedicated workshops for meticulous inspection and state-of-the-art equipment.

  • Two-dimensional

  • laboratory

  • Eraser test


Provide Quality Report According To Your Request

Giving you added confidence in the prototypes and parts we manufacture for your brand, we can provide detailed quality reports showing material quality and product performance. These reports can come from our internal auditors or third-party labs.


Quality report

For each order we receive, we can obtain a list of quality reports upon your request.

  • Inspection Report
  • Full-scale Report
  • Material Test Report


As an established manufacturer of on-demand products, we are proud to offer a certified library from reputable organizations such as ISO 9001:2015.

  • ISO 9001:2015
  • ROHS
  • arrival

After-Sale Warranty

Huayin Die Casting is committed to providing customers with high-quality die casting parts that meet their requirements. If you receive a product that does not meet your specifications, we offer rework and refund options. Additionally, should you experience any quality issues within one month of receiving our goods, please do not hesitate to contact our after-sales staff. We will work with you to resolve the issue within 1-3 working days.

Conditions for Rework

After advising us of the concern, we review the design and samples to check for inconsistencies. We then fix the complaints and send replacements immediately.

  • Unacceptable processing defects
  • Fail to meet tolerance requirement
  • Incorrect material / finish

Conditions for Refund

Refunds are quickly processed upon confirmation of product issues, and return is processed.

  • The part is not machinable
  • The customer does not agree to rework
  • Other reasons

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