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.


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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Schuler to open new demonstration center in China CompositesWorld

The latest press technology from Schuler will by on display at the Servo TechCenter Tianjin.

SABIC and Kringlan developing first carbon thermoplastic composite wheel CompositesWorld

Collaborative technology close to commercialization in automotive while targeting other industries, including energy efficient appliances.

Thermoforming press CompositesWorld

At JEC Europe 2014, Siempelkamp, a Krefeld, Germany-based supplier of high-performance presses and handling systems for fiber-reinforced composites since 1993, touted its recently developed a 2,000-ton press for thermoforming sheet molding compound (SMC), which can be changed in only a few steps to an injection-press unit for resin transfer molding (RTM).

Economical press molding CompositesWorld

Dieffenbacher’s (Eppingen, Germany) Compress Lite made its debut at JEC Europe 2014.

High volume, in autoclave CompositesWorld

Globe Machine Manufacturing Co. (Tacoma, Wash.) announced the launch of RapidClave 2, its second-generation technology that provides autoclave-processing capabilities in a machine that operates significantly faster than traditional autoclaves.

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New Products
Thermoforming press Siempelkamp
Economical press molding Dieffenbacher North America Inc.
High volume, in autoclave Globe International
Hybrid carbon fiber/glass fiber reinforcement Quantum Composites Inc.
Compression shuttle press Lawton Machinery Group
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