The Critical First Step in Cookware Coating
How Sandblasting Creates the Foundation for Non-Stick Durability
2025-11-12
How Sandblasting Machines Prepare Cookware Surfaces for Coating
Surface preparation determines how long a non-stick pan lasts. In cookware factories, sandblasting machines perform this critical first step. They clean metal surfaces and create the microscopic texture that holds coatings in place.
What Sandblasting Does in Cookware Production
Sandblasting shoots abrasive particles—typically aluminum oxide or garnet—at high speed onto metal surfaces. Three primary results matter for cookware:
1. Removes Contaminants The process strips away stamping oils, oxidation layers, weld spatter, and burrs. This leaves a chemically clean metal surface ready for coating. Without this step, residues would cause coating defects and premature failure.
2. Creates Measurable Roughness The blasting process reduces surface smoothness to a specific range: Ra 2.5–4 micrometers. This controlled roughness forms thousands of tiny cavities. When liquid coating is sprayed on, it flows into these cavities and hardens, creating a mechanical lock. This "anchor effect" multiplies adhesion strength compared to smooth surfaces.
3. Relieves Manufacturing Stress Stamping and deep-drawing operations leave residual stresses in metal blanks. Blasting induces a uniform compressive stress layer on the surface. This stabilizes the part shape and reduces the risk of warping during high-temperature coating curing.
Equipment Types for Different Cookware
Manufacturers use specialized machines based on product geometry:
-
Rotary table systems: Load multiple pots onto a rotating fixture for consistent interior blasting. Common for pressure cookers and wok interiors.
-
Wet blasting systems: Mix abrasive with water to suppress dust. These systems operate in cleanroom conditions and meet strict environmental regulations.
-
Clamp-free machines: Newer designs process mixed-size cookware automatically without custom fixtures. Throughput reaches 1,300 pieces per hour.
Where It Fits in the Production Line
Sandblasting occurs immediately after metal forming and before coating application. The typical sequence: stamping → degreasing → sandblasting → base coat → top coat → sintering. Skipping the blasting step or using incorrect roughness parameters directly correlates with higher customer return rates for coating peeling.
Bottom Line
Sandblasting is not a cosmetic process. It is a controlled engineering step that quantifiably improves coating lifespan and product consistency in modern cookware manufacturing.
ReviewsNumber of comments: {{ page.total }}
I want to comment?
{{item.nickname ? (item.nickname.slice(0, 2) + '*****') : item.source === 1 ? 'mall buyer' : '--'}}
{{item.comment_time}}
Review in the {{item.country}}
Reviews
Merchant
{{replyItem.nickname ? (replyItem.nickname.slice(0, 2) + '*****') : replyItem.source === 1 ? 'mall buyer' : '--'}}
{{replyItem.parent_nickname ? (replyItem.parent_nickname.slice(0, 2) + '*****') : '--'}}
{{replyItem.is_merchant_reply === 1 ? replyItem.reply_time : replyItem.comment_time}}
Review in the {{replyItem.country}}
Reviews
No customer reviews
recommended for you
no data
GET IN TOUCH WITH Us
Copyright © 2025 Caiyi Smart Home (Chongqing) Co., Ltd. | Sitemap | Privacy Policy