Sandblasting Service
MOLDITQUICK provides sandblasting as a value-added surface treatment for molded and machined parts — producing uniform matte textures, preparing surfaces for coating and removing flash and scale without altering dimensions.
Aluminum Oxide Blasting
Sharp, rigid media delivering Ra 0.8–6.3 μm matte finishes and a 12–75 μm anchor profile for paint, powder coat and adhesive bonding on aluminum and steel.
Glass Bead Blasting
Spherical soda-lime beads producing Ra 0.4–2.5 μm satin sheen with minimal material removal — the standard cosmetic finish for visible consumer and appliance parts.
Steel Shot & Grit
Aggressive cleaning and deburring that removes scale, rust, flash and machining burrs, and prepares parts for plating or painting.
Soft & Plastic Media
Gentle deflashing and cleaning for molded thermoplastics and soft metals — removes gates and flash without dimensional change or surface damage.
Precision Masking
Critical surfaces — machined bores, sealing faces, threads and O-ring grooves — are masked so only targeted areas are blasted.
What Is Sandblasting?
Sandblasting propels abrasive media at high velocity against a part surface to clean it, texture it or strip it. Depending on the media — glass bead, aluminum oxide, steel shot or soft plastic — the process can produce anything from a fine satin sheen to a deep matte anchor profile, and it does so without the heat, chemicals or dimensional change of other finishing routes.
In precision manufacturing, blasting plays three roles: it creates a uniform cosmetic texture that hides molding witness lines and small surface marks; it prepares surfaces for paint, powder coating, plating or adhesive by increasing surface area and roughness; and it removes flash, scale and burrs from molded and machined parts. Because the result depends on media size, pressure, angle and dwell time, we establish a reference sample at the prototype stage and lock those parameters for production. It is often combined with other finishes — see oursurface finishing overview for how blasting pairs with PVD, plating and laser engraving.
Key Parameters
Working ranges we control per part; surface profile is verified with a profilometer on the first article.
| Parameter | Typical Range | Notes |
|---|---|---|
| Surface roughness Ra | 0.4 – 6.3 μm | Glass bead at the fine end, coarse oxide at the rough end |
| Anchor profile | 12 – 75 μm | For paint and powder-coat adhesion |
| Media size | 30 – 300 mesh | Selected by finish target and substrate |
| Blasting pressure | 2 – 8 bar | Reduced for plastics and thin walls |
| Dimensional effect | None when masked | Micron-level material removal on exposed areas |
Applications
Sandblasting is specified whenever a uniform texture, a coating-prep surface or clean edges matter more than a glossy cosmetic finish:
- Cosmetic matte finishes on aluminum housings, appliance panels and consumer electronics.
- Paint, powder-coat and PVD adhesion prep on machined and die-cast parts.
- Deburring and deflashing of molded thermoplastics and zinc/aluminum die castings.
- Surface preparation before plating or anodizing for uniform deposit growth.
Parts arrive at the blasting line from our injection molding,CNC machining anddie casting operations, so texture requirements are agreed before the tool is built.
Why MOLDITQUICK
MOLDITQUICK (Dongguan Guohong Precision) runs a 10,000 m² plant with 280 employees under IATF 16949, ISO 13485 and ISO 9001. Our blasting cell is part of the in-house finishing line, which means texture samples are validated on the actual production part — not on a coupon — before the first article ships.
Every job includes masking drawings, a locked process card (media, pressure, time) and surface-roughness verification on the first article. Combined with the rest of our manufacturing services, prototype and small batches ship in 7–12 days and mass production in 25–30 days, worldwide.
Frequently Asked Questions
Will sandblasting change my part dimensions?
No. Blasting removes only microns of surface material. When critical features are masked, machined bores, threads and sealing faces hold their original tolerance exactly.
Can you sandblast plastic parts?
Yes. Molded thermoplastics are blasted with soft or plastic media at reduced pressure to remove gate flash and create a uniform matte texture without warping or whitening.
What surface roughness can you achieve?
From Ra 0.4 μm with fine glass bead up to Ra 6.3 μm with coarse aluminum oxide — we tune media, pressure and cycle time against a surface-profile sample you approve before production.
Do you mask critical machined surfaces?
Yes, masking is standard practice for every blasting job. Threads, press-fit diameters, sealing faces and optical surfaces are protected so the finish goes only where it is specified.
How long does sandblasting add to lead time?
Typically 2–5 days. Prototype and small batches ship in 7–12 days total; mass production in 25–30 days.