Page 400 - Subyek Computer Aided Design - [David Planchard] Engineering Design with SOLIDWORKS

Extrude and Revolve Features Engineering Design with SOLIDWORKS® 2018

Injection Molded Process

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Lee Plastics of Sterling, MA, is a precision µ Resin -~'\'"'""· · ·: .... : '·
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injection molding company. Through the - I , ~.
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World Wide Web (www.leeplastics.com),
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review the injection molded

manufacturing process.

The injection molding process is as

follows:

Plate A - Plate B

An operator pours the plastic resin, in the

form of small dry pellets, into a hopper.
Hopper • ·•'·
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The hopper feeds a large augur screw. µ ~ ,.... . .. •
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The screw pushes the pellets forward into ... ', -·

a heated chamber. The resin melts and I •• l ·~ ,i_
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accumulates into the front of the screw.

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At high pressure, the screw pushes the

molten plastic through a nozzle, to the gate

and into a closed mold (Plates A & B).

Plates A and Bare the machined plates

that you will design in this project.

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The plastic fills the part cavities through a Jt \ • -
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narrow channel called a gate. ;>,I'... . .
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The plastic cools and forms a solid in the •

mold cavity. The mold opens ( along the Screw

parting line), and an ejection pin pushes

the plastic part out of the mold into a slide.

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Injection Molded Process

(Courtesy of Lee Plastics, Inc.)

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