Injection Molding By: Kimberlee Marsh. Steps for Injection Molding Clamping Clamping Injection Injection Cooling Cooling Mold-opening Mold-opening Ejection.

Injection MoldingInjection Molding

By: Kimberlee MarshBy: Kimberlee Marsh

Steps for Injection MoldingSteps for Injection Molding

ClampingClamping InjectionInjection CoolingCooling Mold-openingMold-opening EjectionEjection

MaterialsMaterials

NylonNylon StyreneStyrene EthyleneEthylene

Pressure CalculationPressure Calculation

P=F/A

EX: 10^2 mold

200 ton machine

200/10 = 20 tons/in^2 = 40 ksi

ComplicationsComplications

Burned or scorched partsBurned or scorched parts WarpageWarpage Surface imperfectionsSurface imperfections Incomplete cavity fillingIncomplete cavity filling

Advantages and Advantages and DisadvantagesDisadvantages

High ProductionHigh Production Tight TolerancingTight Tolerancing Low Labor CostsLow Labor Costs Minimal ScrapMinimal Scrap No Part FinishingNo Part Finishing

Expensive EquipmentExpensive Equipment Running CostsRunning Costs

ReferencesReferences

-http://en.wikipedia.org/wiki/Injection_molding

-http://www.efunda.com/

-http://claymore.engineer.gvsu.edu/jackheod/manufact/manufact-213.html

Magnets & Magnets & ElectromagnetsElectromagnets

By: Jennifer HensleyBy: Jennifer Hensley

History of MagnetsHistory of Magnets

The ancient Greeks and Chinese are credited as the first to find and use a naturally occurring iron ore -magnetite- attracts other materials containing iron.

When stones similar to magnetite, are freely suspended in the air they have a tendency to be in the north and south direction.

SI UnitsSI Units

Magnetic field strength unit is the tesla

Unit of total Magnetic Flux is the weber

1 weber = 1 tesla flowing through 1 square meter

(For a magnetic flux density to equal 1 tesla, a force of 1 newton must

act on a wire of 1 meter in length, carrying 1 amp of current)

Materials Materials

Magnetic materials are attracted by a magnet, such as iron, steel, nickel, and cobalt (ability to become magnetized).

Nonmagnetic materials such as paper, wood, glass, or tin, which are not attracted by magnets, are considered nonmagnetic and cannot become magnetized.

Natural Magnets are magnetic stones such as those found by the ancient Greeks.

Permanent MagnetsPermanent Magnets

When a material is placed into a strong magnetic field and will begin to show a magnetic field of it's own, but also continue to show a magnetic field once removed from the original field.

All magnets have at least two poles one north pole and at one south pole.

ElectromagnetsElectromagnets

The simplest form of an electromagnet, is a wire that has been coiled into one or more loops. This coil is known as a soleniod

If the wire is wrapped around a core it gives off a stronger field and the thicker the core also makes a stronger field

The more wraps of the wire gives greater magnetic force

Pros and ConsPros and Cons

Permanent magnets do not rely upon outside influences to generate their magnetic field.

Electromagnets rely upon electric current to generate a magnetic field, when the current increases, so does the field.

In applications where a variable magnetic field is not required, permanent magnets are generally superior.

Permanent magnets can be manufactured to produce stronger fields than any electromagnet of similar size.

DemoDemo

ReferencesReferences

http://http://en.wikipedia.orgen.wikipedia.org http://http://

ditc.missouri.edu/designTasks/electorMagnditc.missouri.edu/designTasks/electorMagnet/magElec.htmlet/magElec.html

http://http://education.jlab.orgeducation.jlab.org

3D Model3D Model

Kimberlee MarshKimberlee Marsh

&&

Jennifer HensleyJennifer Hensley

Good VS. BadGood VS. Bad

Kim’s Blade FEAKim’s Blade FEA

Jennifer’s Button FEAJennifer’s Button FEA

Just for fun FEAJust for fun FEA

Any ?’s