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2020-09
Everlasting Machinery: the development prospects of the blister industry
Vacuum plastic molding process, as early as the beginning of the 20th century has been known, but applied to industrial production is only in the 20th century after the 1940 s, and in the 1960 s there is a greater development. In the past 20 years, it has developed into one of the important methods for processing packaging materials. The reason for the rapid development of this technology is the continuous innovation of vacuum blister molding process and equipment, as well as the development of new sheets with molding properties, and it is also determined by the development of packaging technology and the characteristics of vacuum blister molding packaging itself.
Vacuum blister forming is one of the most commonly used forming methods for packaging containers. It is a thermoplastic plastic sheet molding object two molding technology. In foreign countries, vacuum plastic molding is an old molding process. Due to continuous development and changes, it has been highly automated and mechanized, and no waste materials are produced, and 100 percent of the raw and auxiliary materials are turned into products. The molding system engineering of the whole assembly line production.
Vacuum Blister forming is different in the following conditions:
1. The re-molding temperature required for heating the molding material to a high elastic state;
2. Molding molds usually used for plastic molding;
3. Cooling the product to a cooling temperature at which no dimensional change occurs;
4. After the size is stable, the film is removed.
In most cases, post-blister processing is also necessary, such as: trimming, welding, bonding, heat sealing, coating, metal spraying, flocking, printing.
Vacuum forming has now become a widely accepted term in the field of processing: 'vacuum forming' (vacuum forming), and 'pressure forming' (pressure forming) refers to some special processes using air pressure processing, 'thermoforming' (thermo forming) is a general term for various thermoplastic molding (including vacuum and pressure, or mixed molding).
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