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.


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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.
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Hydraulic forming press CompositesWorld

French Oil Mill Machinery Co. (Piqua, OH, US) and TMP (Piqua), A Division of French, a custom hydraulic press manufacturer, have developed a hydraulic press system to improve the part quality of critical composite aerospace components while reducing production cost, energy consumption and noise.

Wet compression molding CompositesWorld

Old process updated and automated to offer lower cycle time and cost in BMW 7 Series plus potential for void-free, 65% fiber volume composite parts.

Turnkey manufacturing systems: Materials, markets and maturation CompositesWorld

Automated production cells promise affordability and less risk in scaling up composites production, but are they really the path forward?

Cytec opens high-volume processing Application Centre CompositesWorld

The Centre, in Heanor, UK, will focus on developing automation and processes to facilitate high-volume manufacturing of thermoset and thermoplastic composites parts.

RocTool names new CEO CompositesWorld

Mathieu Boulanger officially becomes RocTool’s CEO on Dec. 1, 2015.

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