| 摘要 |
Wear components of a powder coating system are provided with a coded visual element in one aspect of the invention. The coded visual element can provide an indication of the manufacturer or a characteristic of the part. In molded parts, the coded visual element can be implemented as a different color overmolded part wherein a material of one color is overmolded on a base material of another color. The overmolded material can be elastomeric and formed with integral exterior rings to provide a friction fit for the wear component in, for example, a venturi pump or a spray gun while eliminating the need for separate O- rings and the need to machine or form grooves in the exterior of the parts to receive the O-rings. Similarly, integral flanges can be formed to eliminate the need for separate snap rings and grooves to accept the snap rings. Color coding of the overmolded material can also be implemented in a way to provide an indication of wear. Alternatively, the part can be constructed as a layered structure of two or more materials to provide an indication of wear with or without a visual coding element Another aspect of the invention is the idea of forming the replacement part as a single piece part such as a molded part. This type of part can be formed to incorporate integrally formed resilient rings and/or integrally formed flanges on the exterior of the part to take the place of O-rings and snap rings. |
