Zone: Compression Molding
h-beamandmachine_checked.jpg Overview

Compression molding is a high-volume process that employs expensive but very durable metal dies. It is an appropriate choice when production quantities exceed 10,000 parts. As many as 200,000 parts can be turned out on a set of forged steel dies, using sheet molding compound (SMC), a composite sheet material made by sandwiching chopped fiberglass between two layers of thick resin paste. To form the sheet, the resin paste transfers from a metering device onto a moving film carrier. Chopped glass fibers drop onto the paste, and a second film carrier places another layer of resin on top of the glass. Rollers compact the sheet to saturate the glass with resin and squeeze out entrapped air. The resin paste initially is the consistency of molasses (between 20,000 cps and 40,000 cps); over the next three to five days, its viscosity increases and the sheet becomes leather-like (about 25 million cps), ideal for molding.


Read More...

BROWSE
Most Recent Content: Compression Molding
SMC Flexes Muscles in Other Markets

Often identified with automotive body applications, sheet molding compound shows growing promise in a variety of other temperature- and weather-resistant applications.
Read complete article Read More

Carbon composite spring: Big performance, small package CompositesWorld

Disc spring stack is lighter, reduces friction and can be performance-tuned.

Composite engine piston cylinder housings CompositesWorld

Phenolic BMC could replace aluminum in car/motorcycle engine housings.

Prepreg compression molding makes its commercial debut CompositesWorld

Ultra-thin, preformed laminate designs enable CFRP decklid manufacture at lower-than-expected mass and at cycle times approaching mass-production speed.

The ends will be justified by the means CompositesWorld

CW Editor-in-chief Jeff Sloan recalls the one question he's consistently fielded throughout his quarter century in magazine editing and publishing: “Don’t you worry about running out of things to write about?” Here's his answer.

Creative Composites adds new compression molding press CompositesWorld

The new press will be used to meet growing demand for composite components in the automotive, aerospace, truck, bus and construction sectors.

View More Content in This Zone    RSS RSS Feeds

New Products

Wabash