The compression molding process can be used to produce almost any stamped appearance part with very high part uniformity. Inserts, ribs and attachments can be added to the original mold and reduce the handling or addition of parts after molding. Good surface finishes are obtainable. Examples of press molded products include entry doors, electrical boxes and components, appliance housings, furniture, and automobile components.
Compression molding is a high-volume, high-pressure method suitable for molding complex, parts on a rapid cycle time. Compression molding tooling consists of heated metal molds mounted in large presses. The temperatures and pressures used during compression molding operation require high quality and much higher cost molds than many other composite fabrication methods. This limits the use of compression molding to parts with high production rates. During the
compression molding process the mold set is mounted in a hydraulic or mechanical molding press. The molds are heated to 2500 to 4000 F. A weighed charge of molding compound is placed in the open mold. The two halves of the mold are closed and pressure is applied. Depending on thickness, size, and shape of the part, curing cycles range from less than a minute to about five minutes. The mold is opened and the finished part is removed.
Bulk Molding Compounds, Inc. (BMCI)
BMCI is the leading global supplier of high-quality glass reinforced, polyester thermoset compounds. Serving a broad range of industries with seven ISO 9001-2000 registered facilities on four continents, BMCI delivers dependable quality, logistical convenience and cost savings to customers in the Americas, Europe and Asia.
IDI Composites International (IDI) is the premier global formulator and manufacturer of thermoset molding compounds for custom molders and OEMs. The company provides customized polyester/vinylester-based bulk molding compounds (BMC), sheet molding compounds (SMC), and a new line of Structural Thermoset Compounds that are manufactured in both sheet and bulk formats for the most demanding applications in markets such as Military/Aerospace, Transportation, and Industrial.
Since 1970, Mar-Bal has engineered and manufactured quality, customized materials and parts. Mar-Bal serves the appliance, electrical, transportation and industrial marketplaces from its four facilities in North America. Injection, Compression, Insert and Transfer Molding of BMC/SMC, Polyester, Phenolics and Epoxy. Mar-Bal provides tool and mold design.
USA and China
As a dedicated specialist, MFG offers the industry an unmatched depth of capability in molded fiber glass design and manufacturing. Our strength in molding, assembly, and painting is supported by extensive computer-aided design (CAD), process engineering, and research activity. Our multiple material processes allow us to assist customers in the early design stages of a project by offering them material recommendations that will provide the greatest value and best performance. These processes include sheet molding compound (SMC) and liquid molding composite (LMC), including structural reaction injection molding (SRIM).
Swanstone® is a compression molded compounder with a focus on kitchen and bath surfaces.
We take advantage of four major plastic molding processes in producing precision custom molded composites to customer design and cost targets. These include injection molding, transfer molding, compression molding and insert molding.
Acell has developed novel processes enabling high performance composite products to be manufactured with lower cost tooling requirements. We have designed products for a variety of fields of applications in the building, transportation and defense sectors. In doing so we have created a portfolio of internationally filed patents and applications protecting the processes and product applications and license of these processes to companies worldwide to facilitate the production of new composite products.
Giulioano Milanese, Italy