PRESSURE HOLDING DEVICE FOR MANUFACTURE OF COMPOSITE PARTS BY RESIN INJECTION AND APPROPRIATE METHOD Russian patent published in 2017 - IPC B29C70/48 B29C45/77 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to a pressure holding device in the manufacture of composite parts performed by resin injection. Injection system (100) comprises a resin injection network associated with press mould (20). Pressure holding devices (10a, 10b) for the system comprise pressurisation units configured to discharge pressurized gas into the pipeline (64); first connection means (11) capable of connection with the said resin injection network and connection to said pipeline (64); second connection means (12) capable of connection to said press mould (20), said injection system (100). First connection means (11) is connected to the second connection means (12) via pressure holding pipeline (13) adapted to pass the said gas injected under pressure. However, the first and the second connection means are arranged so that the longitudinal axis of pressure holding pipeline (13) under pressure is vertical.

EFFECT: invention provides for exclusion of porosity formation in the composite part due to the vertical arrangement of the pressure holding pipeline, allowing to avoid the pressurized gas passage through the resin.

8 cl, 2 dwg