golf balls
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GOLF BALLS. MSE151 Composites Dr. Jose Mario Diaz December 15, 2011. Gotico, Philipp Oracion , Cherry Anne Sible , Wilbert. Introduction. Used in the game of golf Performs within a specified velocity, distance, and symmetry limits - PowerPoint PPT PresentationTRANSCRIPT
GOLF BALLSGotico, Philipp
Oracion, Cherry AnneSible, Wilbert
MSE151 Composites
Dr. Jose Mario Diaz
December 15, 2011
Introduction
0Used in the game of golf0Performs within a specified
velocity, distance, and symmetry limits
0Can be personalized depending on your handicap, swing speed, and equipment specifications.
History of Golf Balls
0 Before 17th Century - Wooden balls0 1618 - Featherie ball, which is a hand
sewn leather pouch stuffed with chicken or goose feathers and coated with paint.
0 1848 - Gutta-percha ball, which is made from the Malaysian Sapodilla Tree by heating and shaping it while hot.
History of Golf Balls
0 20th century - multi-layer balls were developed, first as wound balls consisting of a solid or liquid-filled core wound with a layer of rubber thread and a thin outer shell.
0 Modern balls - consist of several layers of various synthetic materials like surlyn or urethane blends. They are usually classified according to the number of layers.
Specifications
0Weight < 45.93 grams0Diameter > 1.680 in 0Must be Perfectly Round0Good elastic collision0Must not crack or deform0Must meet the specifications of
the USGA
Types of Golf Balls
01-piece balls0 Seldom used as playing ball0 Inexpensive and very durable0 Surlyn with dimples molded in
02-piece balls0 Used mostly because it combines durability with
maximum distance0 Solid Core: high-energy acrylate/resin0 Cover: tough, cut-proof (Surlyn)
Types of Golf Balls03-piece balls
0 Core: Solid rubber/liquid center0 Core is covered by many yards of elastic windings0 Cover: durable Surlyn/Surlyn like, or balata0 Softer and take more spin allowing more control
on the ball’s flight when hit
04-piece balls0 Newer form of the original 3-piece ball
Ball Built-up
DIMPLES0 Shallow Dimple: Low
trajectory, good control0 Deep Dimple: High
trajectory, longer flight time
COVER0Balata
0 Natural rubber; softest0 Less cut resistant0 Spin easier0 Maximum feel and control
0Surlyn0 Most durable cover0 Thermoplastic resins by Dupont0 Better cut and abrasion resistance
than balata cover0 Harder cover than balatalower
spin rate
The Manufacturing ProcessFORMING THE CORE ELASTIC WINDING
(for 3-layer balls)2
0 Roll mills: mixing0 Extruder: forming of the slag0 Compression molding: forming
of the core
0 Electronic winder applies rubber thread to silicone and rubber core
0 Electronic device, reacting to vibrations of thread in front of photocell, maintains tension.
1
The Manufacturing ProcessFORMING THE COVER AND DIMPLES3
0Injection molding0 The core is centered within a mold cavity by pins,
and molten thermoplastic is injected into the dimpled cavity surrounding the core.
0Heat and pressure cause the cover material to flow to join with the center forming the dimpled shape and size of the finished ball.
0Compression molding0 The cover is first injection molded into two hollow
hemispheres0 These are positioned around the core, heated and
then pressed together, using a mold which fuses the cover to the core and also forms the dimples.
The Manufacturing ProcessPOLISHING, PAINTING, FINAL COATING
DRYING ANDPACKAGING5
0 Flash or rough spots and the seam on the molded cover are removed.
0 Spray guns that are automatically controlled are used to apply the paint.
0 The ball is stamped with the logo0 Final step: clear coat for high sheen
and scuff resistance.
0 The balls are loaded into containers and placed in large dryers
0 After drying, the balls are ready for packaging in boxes
4
Golf Balls: How is it made?
GOLF BALLSGotico, Philipp
Oracion, Cherry AnneSible, Wilbert
MSE151 Composites
Dr. Jose Mario Diaz
December 15, 2011