Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of sandblasting in China. If you're going to wholesale bulk cost-effective sandblasting made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Enhancing Part Performance and Aesthetics with Precision Sandblasting
In the world of high-precision manufacturing, the surface finish is just as critical as the dimensional accuracy. Sandblasting (also known as abrasive blasting) is a vital post-processing step that transforms a raw CNC machined or cast part into a production-ready component.
At Hansheng Automation, we provide comprehensive Sandblasting Services integrated seamlessly with our CNC machining and casting capabilities. Whether you require a uniform matte finish for aesthetic appeal or a chemically clean surface for subsequent coating, our controlled abrasive blasting process ensures superior results without compromising the integrity of your parts.
Media Selection & Process
Our sandblasting process utilizes a high-velocity stream of abrasive material to condition the surface of the metal. By adjusting the air pressure, nozzle distance, and media type, we can achieve a wide spectrum of finishes-from light cleaning to aggressive texturing.
We offer a variety of blasting media tailored to specific material requirements:
Glass Beads: The most common media for CNC parts. It creates a clean, bright, and satin/matte finish without removing significant material. Ideal for stainless steel and aluminum.
Aluminum Oxide: A harder, angular media used for aggressive cleaning, etching, and surface preparation. It creates a rougher profile excellent for paint or coating adhesion.
Steel Shot/Grit: Primarily used for heavier applications, such as cleaning castings or peening to increase fatigue strength.
Ceramic Beads: Offers a balance between durability and finish quality, often used for aerospace applications to prevent ferrous contamination.
Why Choose Hansheng for Sandblasting?
As a manufacturer with capabilities ranging from ISO Level 5 gears to large-scale castings, we understand the nuances of surface treatment better than a standalone finishing shop.
Precision Masking
We protect critical tolerances (e.g., bearing journals, threaded holes) using custom masking fixtures to ensure the blasting only affects intended areas.
Versatile Capacity
From small, intricate precision gears to large casting frames (up to 3800mm in length), our facility is equipped to handle diverse workpiece sizes.
Material Expertise
We have specific protocols for Aluminum, Stainless Steel, Titanium, Brass, and Cast Iron to effectively treat the surface without embedding contaminants.
Controlled Roughness
We can target specific Ra (Roughness Average) values to meet technical drawings or industry standards (e.g., SA 2.5, SA 3).
Technical Capabilities
Max Part Dimensions: Up to 3800mm x 1500mm x 1200mm.
Standard Finishes: Matte, Satin, Textured, Etched.
Surface Roughness (Ra): Controlled range from 0.8µm to 6.3µm (customizable upon request).
Compatible Materials: Aluminum Alloys, Steels (Carbon/Stainless/Tool), Titanium, Magnesium, Copper Alloys.
Quality Assurance & Consistency
Inconsistent surface finishing can lead to batch rejections. We enforce strict process controls:
Media Maintenance
Regular filtration and replacement of blasting media to ensure consistent cutting action and finish quality.
Pressure Regulation
Automated pressure controls to prevent warping on thin-walled parts.
Visual & Tactile Inspection
Every batch is inspected under standard lighting to ensure uniformity and freedom from residue.
Application
Our metal finishing solutions are designed to solve specific manufacturing challenges. Sandblasting is not just about looks; it is a functional process used for:
Deburring & Deflashing
Efficiently removing machining burrs, sharp edges, and casting flash to ensure safe handling and assembly fit.
Surface Preparation
Creating a specific surface profile (roughness) that maximizes the bond strength for PVD coatings, powder coating, painting, or anodizing.
Visual Uniformity
Removing tool marks, heat discoloration, and minor surface imperfections to achieve a consistent, professional matte or satin appearance.
Cleaning & Descaling
Stripping away rust, mill scale, heat treat scale, and oxidation from steel and cast iron parts.
Stress Relief (Peening)
Using spherical media to compress the surface layer, which can help resist cracking and fatigue-crucial for gears and transmission components.
Get a Complete Manufacturing Solution
Stop juggling multiple vendors for machining and finishing. By choosing Hansheng Automation for your Sandblasting Service, you benefit from reduced lead times, lower logistics costs, and single-source accountability.
Ready to finish your project?
Contact our engineering team today to discuss your surface requirements and get a competitive quote for your machined or cast parts.
FAQ
Q: How does sandblasting affect the dimensional tolerances of precision CNC parts?
A: This is an important factor for high-precision components. Sandblasting only removes a very small amount of material (typically between 0.005mm and 0.02mm, depending on the media and pressure).
Q: Can you mask critical features such as bearing journals or threaded holes?
A: Yes, we can protect critical areas such as bearing bores, sealing surfaces, and internal threads using custom-made plugs, caps, and masking tape.
Q: What factors determine the final surface finish and Ra value?
A: It is determined by three main factors: media type (such as glass beads or aluminum oxide), grit size, and blasting pressure.
Q: Is sandblasting suitable for aluminum parts?
A: Yes, aluminum is one of the most common materials we process. We use glass bead blasting on aluminum parts to produce a bright, clean, and uniform satin finish. This effectively removes machining tool marks while avoiding the graying of the metal surface caused by using inappropriate media.
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