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Bowling Ball

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by

Alvaro Flores

on 13 December 2014

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Transcript of Bowling Ball

Bowling Ball
Manufacturing process
By: Alvaro Flores
Nael Albrahim



Different processes, techniques and designs are developed
The bowling ball has three holes on it, done in an special manner for the fingers to be placed in them
The ball weight ranges from 6 to 16 pounds
The cost arranged between $25-$200

Description:
Raw Materials
Core
• Mix of heavy materials : polyester based resin, iron oxide and barium for adding weight to the ball.

• Resin is put into a mold to make the core block, which comes into two different ways :
Symmetrical
Unsymmetrical

Filler material
•Lighter resin that is put between the weight block and the outer shell


Coverstock

Is made out of a dense and rubbery plastic called
Urethane
, that is put into a mold.

• A lathe finishes the surface.


• The ball gets polished and washed.

The Manufacturing Process
A mold is formed to the core shape developed during the computerized design process.

Material is poured into it and allowed to harden. The solid core is removed.
A compound core may be formed by inserting the first core into a second mold and pouring material of a different density around all or part of it.
1. Making the core
The Manufacturing Process
2. Forming the shell
The core is placed inside a coverstock (spherical mold)
The main core may be supplemented by adding a collar or weight
The core is attached to a pin that projects inward from the shell of the mold and holds it in the correct position
The coverstock material is poured into the mold, encasing the core, and is allowed to harden.

The thickness may be 1 in or 2 in .
The Manufacturing Process
3. Filling the gaps
After removed from the coverstock mold, there is a hole where the core-holding pin had been. A plastic dowel is inserted into the hole and cemented in place.

After purchased, the pin will be used as a guide for positioning the finger holes.


The logo is located at the top of the ball, that is, above its center of gravity. It is made with automated Laser printer.
The ball is finished to the proper size specification by turning it on a lathe and shaving off excess material .

The ball is boxed and shipped to the company's distributor.
The surface of the ball is finished to the desired texture. It is sanded to either a matte finish or to an appropriate degree of polish, (generally ranging from 240-600 grit).
The Manufacturing Process
4. Finishing
Full transcript