The sheet is extended by softening by heat, and then by virtue of the pressure applied, the softened sheet is close to the mold surface, molded into a set pattern, and the product is obtained after cooling modification.
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The smallest parts that can be produced by hot compression molding are the packaging materials for tablets or the batteries for watches, and very large parts can also be produced, such as 3 to 5 m long hulls. The thickness of the molding material is from 0.05 to 15 mm, and for the foam material, the thickness can reach 60 mm.
Two-sheet thermoforming uses two sheets, making it possible to produce a double-sided hollow box part with features on both sides.
Double sheet thermoforming expands the application of hot compression molding, and in some cases can replace rotational and blow molding to produce hollow box parts.
Due to the low pressure, the complex mold structure and expensive mold materials are not required, so the mold cost is low, the part cost is very competitive, and it is an ideal process for large part samples and small batch production.
A method of manufacturing open shell products using thermoplastic sheets. The plastic sheet is cut to a certain size for heating and softening, and with the help of the air pressure difference or mechanical pressure on both sides of the sheet, it is deformed and then overlaid on the specific mold contour surface, cooled and shaped, and the cutting edges are trimmed.
Also known as vacuum forming machines, these machines heat plastic sheets until they are malleable, and then use vacuum to mold the plastic into molds. Once the plastic is formed and cooled, a stream of air separates it from the mold. Thermoforming machines are best suited for easy-to-form plastics such as ABS, polystyrene and PETG.
Dual sheet thermoforming is a specialized type of thermoforming in which two sheets of material are used to produce a part. In this process, two sheets of material are heated until they are pliable, then placed into a mold where they are formed using a combination of pressure and vacuum. The two sheets are then bonded together, creating a part that is composed of two layers of material.
Sheet forming is a manufacturing process that involves shaping a sheet of material, such as metal, plastic, or composite, into a specific shape. This process can be performed using a variety of techniques, including bending, stretching, or drawing the material.