Open Mold Spray Up:

is similar to the hand lay-up process. The difference comes from the application of the fiber and resin material to the mold. Spray-up is an open-molding composites fabrication process where resin and reinforcements are sprayed onto a reusable mold. The resin and glass may be applied separately or simultaneously "chopped" in a combined stream from a chopper gun. Workers roll out the spray-up to compact the laminate. Wood, foam, or other core material may then be added, and a secondary spray-up layer imbeds the core between the laminates. The part is then cured, cooled, and removed from the mold.

Advantages

• 2 – 4 times more efficient than hand lay-up.
• Lower cost of the raw material by using roving instead of fabric.
• No gap in the molding products, satisfactory integrity.
• Reducing flash, scraps and material waste.
• Free adjustment of wall thickness of the product, the proportion of fiber and resin as well as the length of fiber.
• Lower tooling cost suitable for low volume production.