Patent ID: 11931769
Assignee: MAZDA MOTOR CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 11:
12. The method of claim 3, wherein the crown surface has a cavity in a center part, a part around the cavity is an annular flat part, and a bulged part is provided in a center part of the cavity, the method further comprising the steps of:
for the annular flat part and the bulged part, forming a portion of the heat shield layer on the annular flat part by the dispenser such that a discharge direction of the heat shield material is oriented in the axial direction of the piston; and
then spraying the heat shield material on a part between the annular flat part and the bulged part by a paint spray gun to form the heat shield layer over the portion of the heat shield layer of the annular flat part and the bulged part.