Electro-pyrotechnic initiator

Abstract

The invention relates to an electric pyrotechnic detonator, which includes a pyrotechnic charge (6), and the pyrotechnic charge (6) includes at least one compound component. The detonator also includes a plastic housing (1), which consists of two parts. The first part (2) includes a plastic wall (4) integrated with a bottom (5) made of plastic and constitutes a container. The second part (3) with a main axis (10) is crossed by at least two pins (11, 12) in the direction of said axis (10). The pins (11, 12) are connected together by a bridge (13) on a surface (14) of the component (3). The surface (14) is symmetrically concave with a height H and a width L. The second part (3) forms an insert. The first component (2) and the second component (3) are hermetically assembled together by ultrasonic welding.

Description

technical field [0001] The invention relates to an electric pyrotechnic detonator. Background technique [0002] There are two types of detonators. The first type uses a "glass-to-metal seal" type insert and the second type of detonator uses a "plastic" type insert or seal. Type I detonators are generally considered to be airtight and to ensure that their pyrotechnic compounds and / or explosives are not affected by harsh environments, especially humidity. However, it is well known that glass-to-metal seals are essential for the different steps (crimping, welding, etc.) ) are sensitive to thermal and mechanical stresses. [0003] Furthermore, even though the use of a "glass-to-metal seal" insert initially guarantees a hermetic barrier of the insert along the current input pin, it is not always effective for the connection between the insert and the pyrotechnic vessel. [0004] Detonators using plastic seals have issues with airtightness due to the type of plastic material ...

AI Technical Summary

Problems solved by technology

[0003] Furthermore, even though the use of a "glass-to-metal seal" insert initially guarantees a hermetic barrier of the insert along the current input pin, it is not always effective for the connection between the insert and the pyrotechnic vessel

[0004] Detonators using plastic seals have issues with airtightness due to the type of plastic material used (e.g. moisture sensitive polyamide) or weak internal joints (e.g. pinched, glued, etc.)

[0005] Finally, existing detonators, regardless of the type described above, generally include several assembly parts, thereby increasing the cost of the device

The first type of detonator is rather expensive due to the necessity to prepare (surface treatment, etc.) said "glass-to-metal" seal

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