The production process of multi-layer structure PVC baseball involves multiple delicate steps. The following is its detailed production process:
First, material preparation
Inner layer material: Usually, PVC formula material with high strength and strong support is selected to ensure that the baseball can maintain its shape and quickly regain elasticity when hit.
Outer layer material: Soft and comfortable PVC formula material is selected to provide a good grip and appearance texture.
Second, the production of the ball center
Core foundation: The core of a baseball is usually made of materials such as rubber and cork to provide a basic shape and support.
Winding layer: Multiple layers of wool thread or other fiber materials are wound around the center of the ball to increase the elasticity and durability of the baseball. The number of winding layers and the choice of materials will affect the final performance of the baseball.
Third, PVC layer molding
Inner layer forming
Inject the well-proportioned inner layer PVC slurry into the mold.
The mold is heated and plasticized to form the inner PVC material and closely adhere it to the center of the ball and the winding layer.
Outer layer forming
After the inner PVC material is formed, the outer PVC slurry is injected into the mold through a secondary injection method.
Reheat and plasticize again to fuse the outer PVC material with the inner material into one, forming a multi-layer structure.
Fourth, cooling and demolding
Cooling: Pull the mold out of the heating furnace body and place it in water to cool down and solidify the PVC material.
Demolding: Loosen the mold bolts, open the mold, and take out the formed multi-layer structure PVC baseball.
Fifth, post-processing
Inflation shaping: Inflate and shape the removed baseball to ensure that its shape and size meet the standards.
Surface treatment: As required, the surface of the baseball is ground, polished or coated to enhance its appearance quality and durability.
Quality inspection: Conduct quality inspections on the completed multi-layer structure PVC baseball, including tests on dimensions, weight, elasticity, durability, etc., to ensure they meet relevant standards and requirements.