Page 440 - Subyek Computer Aided Design - [David Planchard] Engineering Design with SOLIDWORKS

Extrude and Revolve Features Engineering Design with SOLIDWORKS® 2018

Mold Base

Designing a custom mold base is expensive

and time consuming. An example of a mold

base supplier is Progressive Components ·-·

( www. procomps. com).

The mold base positions the mold cavities.

The mold base plates are machined to create

the mold cavities. The mold base is designed PLATE A

to withstand high pressure, heating and

cooling sequences during the fabrication I

process.

PLATE B

The mold base assembly is composed of the

following two plates and a variety of support

plates, ejector plates, pins and bushings:

• PLATEA

• PLATEB

Courtesy of Progressive Components

Wauconda, IL USA

Applying SOLIDWORKS Features

for Mold Tooling Design

SOLIDWORKS features such as Draft, Fillet and Shell assist in the design of plastic

parts. Utilize the Draft tool to analyze the part before creating the Mold Tooling, PLATE

A and PLATE B.

Most molded parts require Draft. Plastic molded injection parts require a draft angle to

eject the part from the mold. To properly eject the part, design parts with a draft angle in

the direction of the mold movement. A draft angle of 1 ° - 3 ° is the design rule for most

injection molded parts. There are exceptions based on material type and draw depth. For

illustration purposes, a draft angle of 1 ° is used in the BATTERYPLATE.

The draft angle is an option in both the Extruded Boss/Base and Extruded Cut features.

The Draft feature adds a specified Draft Angle to faces of an existing feature.

Use the Fillet feature to remove sharp edges from plastic parts. For thin walled parts,

ensure that the inside sharp edges are removed. Sketch Arcs and 2D Fillets in the 2D

profile to remove sharp edges. The Shell feature, Extruded Cut feature or Extruded Thin

feature all provide wall thickness. Select the correct wall thickness for a successful part.

PAGE 5- 72