Sealing machines are machines that are used to close and seal an individual package or to provide a long continuous horizontal or vertical seal. There are many different types of sealers. Seal-only equipment wraps or secures products, but does not form packages or fill them. Sealing machinery that combines form, fill and seal functions is also available. Some sealing machines transport the plastic film horizontally. Others transport the film vertically. Manual sealing machines aid only in the setting or holding of products. Semi-automatic sealers help with both packaging and placement, allowing a single operator to perform several activities with greater speed and accuracy. Fully automatic sealing equipment requires limited operator intervention. Typically, operators need only replenish packaging components by loading supply hoppers or removing completed cartons.
Sealing machines are used to seal containers with liquids, granules, powders, and sprays for consumer, bulk and original equipment manufacturer (OEM) supply shipments. Packaging materials include aerosol containers, bags and pouches, blister packs, bottles and jars, cartons and boxes, cans, capsules, cartridges, cases, cups and trays, drums and kegs, pallets and pails, and tubes and vials. Some sealing machine suppliers provide related packaging equipment. Equipment that can be used in conjunction with sealing machines includes accumulators, batching machines, bagging machines, banders, sleevers, box making equipment, and machinery or devices for bundling, capping, combining, counting, forming and sealing.
Selecting a sealing machine requires an analysis of specifications, features, and applications. Fully-automated sealing machines list the rate, which is usually measured in pieces per minute. Some automated sealers include an integral feeder and a computer interface that links to a control network. Other sealing equipment is made from stainless steel for improved corrosion resistance. Aseptic or sanitary sealing machines are easy to clean and designed in a manner that inhibits the growth or presence of pathogenic microrganisms. Portable sealing machinery is lightweight or includes wheels or casters for ease of movement. In terms of applications, sealing machines are used widely in the chemical, medical, and pharmaceutical industries. They are also used to process food, beverages, cosmetics, electronics, and semiconductors.