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Diversifizierte Fertigung (3900-DM)
Diversifizierte Fertigung
Diversifizierte Hersteller sind typischerweise große multinationale Unternehmen, die in einer Vielzahl von Branchen und unabhängigen Marktsegmenten tätig sind. Diversifizierte Unternehmen des verarbeitenden Gewerbes sind in fast allen langlebigen Gütern und einer Reihe von langlebigen Gütern tätig. Einer von ...
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Thermoforming Plastic (3089-TH)

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Thermoforming Plastic (3089-TH)
Thermoforming of plastic sheets is a manufacturing process where a plastic sheet is heated to a pliable forming temperature, formed to a specific shape in a mold, and trimmed to create a usable product. The sheet, or film when referring to thinner gauges and certain material types, is heated in an oven to a high-enough temperature that permits it to be stretched into or onto a mold and cooled to a finished shape. Its simplified version is vacuum forming. In its simplest form, a small tabletop or lab size machine can be used to heat small cut sections of plastic sheet and stretch it over a mold using vacuum. This method is often used for sample and prototype parts. In complex and high-volume applications, very large production machines are utilized to heat and form the plastic sheet and trim the formed parts from the sheet in a continuous high-speed process, and can produce many thousands of finished parts per hour depending on the machine and mold size and the size of the parts being formed. In the most common method of high-volume, continuous thermoforming of thin-gauge plastic sheet is fed from a roll or from an extruder into a set of indexing chains that incorporate pins, or spikes, that pierce the sheet and transport it through an oven for heating to forming temperature. The heated sheet then indexes into a form station where a mating mold and pressure-box close on the sheet, with vacuum then applied to remove trapped air and to pull the material into or onto the mold along with pressurized air to form the plastic to the detailed shape of the mold. After a short form cycle, a burst of reverse air pressure is actuated from the vacuum side of the mold as the form tooling opens, commonly referred to as air-eject, to break the vacuum and assist the formed parts off of, or out of, the mold.
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