Sheet Metal Box with Glossy RAL7035 Powder Coating

Qingdao Dmetal manufactured a custom 0.06 THK cold rolled steel enclosure for electronic equipment. The project combined stamping, bending, assembly and glossy RAL7035 powder coating using AkzoNobel powder, with 100% final inspection focused on hole positioning and cosmetic surface quality.

Product Information

The Challenge

Hole Position Accuracy

The enclosure contains multiple holes, slots and mounting features. Although these features are produced during blanking, their final relative positions can be influenced by the following bending and assembly operations. Accurate positioning was important because these features need to match the customer's downstream installation and assembly requirements.

Glossy RAL7035 Surface Quality

The customer specified a glossy RAL7035 powder-coated finish. Glossy surfaces make particles, contamination and other cosmetic imperfections easier to see, so appearance control was an important part of the project.

Forming & Assembly Consistency

The enclosure includes multiple formed features. Variation during bending could influence the final enclosure geometry, hole relationships and assembly fit.

Our Solution

Controlled Sheet Metal Fabrication

Blanking and bending were controlled with attention to the relationship between holes, slots and formed features. Critical positions were checked after forming rather than relying only on the flat blank.

Forming & Assembly Control

The enclosure geometry and fitting condition were checked after bending and assembly to help maintain stable finished-part geometry.

AkzoNobel RAL7035 Powder Coating

AkzoNobel powder was used for the required glossy RAL7035 surface. The coating process focused on cleanliness, coating consistency and careful handling of finished surfaces.

100% Final Inspection

Because the project combined dimensional and cosmetic requirements, finished parts received 100% final inspection before shipment.

Key Results

• Stable hole positioning — critical holes, slots and mounting features maintained stable relative positions through forming and assembly.
• Consistent glossy RAL7035 finish — the finished enclosure achieved the required glossy RAL7035 appearance using AkzoNobel powder.
• Clean cosmetic surface — surface preparation, coating-process control and final inspection helped achieve a clean surface without visible particles.
• Controlled final quality — 100% final inspection was applied before shipment for critical dimensional and cosmetic requirements.

Requirement → Control → Verification

Manufacturing Process

0.06 THK C.R. Steel

↓

Stamping / Blanking

↓

Bending

↓

Assembly

↓

Powder Coating

↓

100% Final Inspection

↓

Packaging

Quality Control

• Critical dimensional inspection
• Hole and slot position inspection
• Bending and forming inspection
• Assembly fitting inspection
• RAL7035 surface appearance inspection
• Visible particle inspection
• 100% final inspection

Project Gallery & Video

FAQ

Can you manufacture custom sheet metal enclosures from customer drawings?

Yes. Qingdao Dmetal supports OEM sheet metal enclosure manufacturing based on customer drawings and technical requirements.

What material was used for this enclosure?

This project used 0.06 THK cold rolled steel.

What surface finish was required?

The customer required a glossy RAL7035 powder-coated finish.

What powder brand was used?

AkzoNobel powder was used for this project.

What were the main manufacturing challenges?

The main challenges were controlling hole positions through bending and assembly, and achieving a glossy RAL7035 surface without visible particles.

How was the surface quality controlled?

The process focused on coating cleanliness, consistent powder application, careful handling and final visual inspection.

Was every enclosure inspected?

Yes. This project used 100% final inspection for critical dimensional and cosmetic requirements.

Related Manufacturing Services

Sheet Metal FabricationSurface FinishingAssembly & PackingCapability

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