METHOD FOR MAKING DETONATING CORD AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2016 - IPC C06C5/04 G01F11/24 

FIELD: blasting operations.

SUBSTANCE: invention relates to production of explosives, particularly of detonating cords (DC), and to equipment. DC is made by forming core from powdered explosive, by performing thread braidings and protective layer of waterproof material. Water-resistant shell is formed either continuously during forming the DC core and performing thread braidings or separately after forming the DC and performing thread braidings. Drive threads are not used. Cord core is formed during uniform filling the first braiding representing a tube ("sleeve") with constant inner diameter with explosive, first braiding is produced from several stretched longitudinal flat threads in the cord core forming device. Explosive is fed into the first braiding by means of a dispenser, performance of which is controlled depending on the explosive charge in the cord. Flat synthetic non-fibrillated threads are used as longitudinal threads of the first braiding of the cord core. Longitudinal threads from the cord core forming device cord and to the receiving station is strongly stretched along the axis to seal the core. At high charges, to avoid certain explosive layers shift inside the first braiding during sealing the cord for reinforcement of the cord core one or several longitudinal threads passed inside the first braiding are used.

EFFECT: method and device for production of detonating cord provide stability of explosive dosing, uniform filling of the DC core with explosive, possibility of rapid change of the cord charge, elimination of caving through explosive shells during fabrication, creating stretching force along the entire length along the axis of the cord for sealing the core with adjustment of force value, equality of DC rolling speed on a coil of the receiving station and speed of cord drawing, rapid change of process modes parameters using a feedback mode.

16 cl, 12 dwg