Grp27: Trigger Switch

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Trigger Switch

Material: Brass, steel, hardened plastic, and bronze.

Quantity: 1

Manufacturing Process: Switch is cast in one piece, then boarded and tapped as well. Metal tubing is threaded. End piece is done on a lathe. Hard plastic shell is done by injection molding.

Function: Releases or holds the water in the gun. Gives the pressurized water a channel to flow through.


Switch is normally closed. When a steel pin is pushed down, the channel is open and the fluid mixture is free to travel. Rod length is 13 3/4 inches

Brass, steel, and hardened plastic were used because they were easy to use, and are able to with stand high forces.

Force causing the flow of pressurized fluid is applied.

The magnitude is estimated at 5000 lbs.

The material choice does effect the process. Different types of metals are easier to machine. Materials other than plastic would need something other than injection molding to create the hard shell.

Each manufacturing process was chosen for this component because it was the easiest, fastest, and cheapest way to do it at high volumes of product.

The rod has a particular shape to maximize flow through the channel. Cover has particular shape to form over rod.

The rod and switch are functional , but the hard plastic shell is both. On one hand the shell is durable and protects and on another hand it has a sleek design making it appealing to the eye.

On a scale from 1-5, 1 being the simple like a ball, and 5 being complex like a engine, this component is a 2.5. This component is kind of of complex but still has basic functions.