FIELD: packaging industry.
SUBSTANCE: packet consists of three workpieces (1, 2, 3) combined with each other to form a working cavity (4) between them and a process cavity (5) located on its perimeter, designed for connection to the vacuum system. On one of the combined surfaces of each pair of workpieces forming the working cavity (4) an anti-diffusion coating (7) is applied in accordance with a predetermined pattern, comprising a binder capable of thermal decomposition. At its opposite surface in places of contact with the anti-diffusion coating (7) the roughness is made. Between the said cavities of the packet a connecting element is mounted, to ensure their communication with each other and the communication of the working cavity to the system of gas supply under pressure at superplastic moulding.
EFFECT: hollow multilayer cellular article made of the said packet has a strong diffusion bonding and high specific strength.
4 dwg
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