Appliance Stamped Parts

PCM changes the way this project has to be handled. With uncoated sheet, a later finishing process may hide some minor handling traces. With pre-painted material, the visible surface already exists when the blank reaches the stamping area.

A tool mark, scratch or pressure trace created during stamping can therefore remain on the finished component.

Changdong pays particular attention to the areas where the sheet contacts punches, dies, pads, locating surfaces and handling points. The objective is not simply to polish every tool surface, but to identify where the actual component is being marked and control that contact.

This makes surface condition part of the stamping process itself rather than a cosmetic inspection added at the end.

The photographs cover the tooling used across the complete four-operation route. Each stage remains physically accessible for fitting, cleaning and correction if the stamped result shows a local issue.

For pre-painted material, this matters because a cosmetic defect can often be traced to a specific contact condition rather than to the entire stamping process.

If a new mark first appears after one operation, Changdong can inspect that die directly instead of modifying unrelated tooling further down the route.

The exact cutting or forming function assigned to each OP follows the released project data rather than being assumed from the operation number.

Keeping an intermediate sample from each operation gives us more information than checking only the finished component.

If the final part shows a profile change, the four samples can indicate when that geometry first appeared. If the issue is a scratch or pressure mark, the same comparison can show after which stage the surface changed.

This is particularly useful for Appliance Stamped Parts because dimensional and cosmetic requirements can exist on the same component.

The process samples therefore become a practical production reference rather than display pieces used only during tool tryout.

A pre-painted component can have an excellent-looking surface and still fail to fit the appliance assembly. The opposite is also true: a dimensionally correct part may still be unacceptable if the customer-visible finish has been scratched during production.

Changdong therefore separates the two questions during inspection.

Drawing requirements control dimensions such as hole position, edge location, formed height and assembly-related features. Cosmetic requirements define which surface marks are acceptable for the actual application.

Keeping those acceptance criteria distinct avoids spending time improving hidden nonfunctional areas while overlooking a feature that actually affects installation.

Changdong manufactures the four stamping dies used behind this type of component supply.

If production repeatedly shows a mark at the same location, the stamped part can be taken directly back to the tool responsible for that area. Our tooling team can compare the actual contact point with the physical sample instead of treating the problem only as a final inspection rejection.

This is especially useful with pre-painted sheet, where repeated cosmetic defects are often better solved at the contact source than by adding more sorting after stamping.

For customers sourcing finished components, the tooling work remains behind the supply program rather than becoming a separate supplier-management task.

For pre-painted parts, production does not really finish when the component leaves OP40.

The same painted surfaces still pass through collection, inspection, stacking and shipment. Packaging therefore needs to avoid uncontrolled rubbing or pressure on areas that have already passed cosmetic inspection.

Where the customer specifies visible zones or particular cosmetic acceptance requirements, those conditions can also be considered when the packing method is defined.

This is how Changdong approaches ongoing Appliance Stamped Parts supply: the coating condition, stamped geometry and packed condition all belong to the delivered product.