Glue solution injector driven by electromagnetic expulsive force

Abstract

A glue ejector driven based on electromagnetic expulsive force comprises a nozzle, a spray needle, a glue cavity, a thermal cavity, a spray needle spring pretightening device and an electromagnetic body. The pray needle spring pretightening device comprises a pretightening force adjusting knob, a stroke regulating knob and a pretightening spring; the electromagnetic body comprises an upper connection body, a location chock block, a lower connection body, a magnet core, a loop, a gag bit, an adjustable baffle and a pretightening nut; the invention leads an electromagnet and the gag bit to exclude mutually by controlling the galvanizing voltage of the electromagnet to drive the spray needle to move upwards and compress the spring, then the spray needle restores under the action of the spring; thereby leading the spray needle to reciprocate, so as to reach the aim of spraying glue. The glue ejector of the invention has the advantages of simple structure, convenient use, adjustable spraying speed and glue spraying amount, long service life, which is suitable for industrialization manufacture, is capable of replacing the existing spring-pneumatic drive glue spraying system and is suitable for the sealing and packaging of micro-electric chips in particular.

Description

technical field [0001] The invention discloses a glue spraying device, in particular to a glue injector driven by electromagnetic repulsion, relates to the technical field of microelectronic equipment, and is mainly suitable for microelectronic chip packaging. Background technique [0002] Glue jetting is a new type of microelectronic packaging technology. In the existing technical field, the glue spraying equipment used for microelectronic packaging is mainly based on the pneumatic glue spraying equipment of Asymtek Company. It controls the high-pressure air flow in and out through the air control valve to push the driver piston to move up and down, thereby pushing the injection needle to reciprocate, and realizes the injection process of extruding glue. The driving force provided by the existing pneumatically driven injector is small, and at the same time, because the needle directly collides with the base, the material and size of the needle are greatly limited, and the ...

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Problems solved by technology

There is a U.S. patent related to this, which proposes a design scheme of electromagnetic suction-driven injection distributor, which does not improve the shortcomings of traditional pneumatic injection distributors and still has the following disadvantages in its structure: First, due to the design As a whole, it is difficult to achieve a small gap between the electromagnet and the armature; second, there is no limit pin designed, and the spray needle directly collides with the base, making the spray needle easy to damage; third, there is no design preload adjustment knob, Can not adjust the movement stroke and spring preload

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