Method and equipment for disassembling components entirely from waste circuit board

Abstract

The invention relates to one method and device to disable elements from old circuit board, which comprises the following steps: fixing circuit board or using limit box container circuit board; heating; fixing or connecting impact lever and circuit board fix device for impact; using oscillation device spring network band isolation, collection part and welding; after cooling to sort the circuit base board and element. The device comprises impact lever, compression spring, circuit board fix device, protruding wheel, guide rail, spring net band, and hot wind entrance hole.

Description

technical field [0001] The present invention relates to a method and equipment for integrally disassembling components from waste circuit boards, in particular to a method for integrally disassembling (or removing) components from printed circuit boards based on function recovery without damage The utility model relates to a device for realizing and belongs to the technical field of production, maintenance and recycling of waste products. Background technique [0002] A printed circuit board (Printed Curcuit Board, referred to as PCB, or Printed Wiring Board, referred to as PWB) is an important part of electronic information products, household appliances, etc. my country is a major producer of circuit boards in the world, and tens of thousands of tons of waste circuit boards are produced in the production process every year; with the continuous upgrading of electronic and electrical products, a large number of electronic and electrical products have been eliminated, and pri...

AI Technical Summary

Problems solved by technology

Its disadvantages are: due to its material characteristics (the base material is mainly made of epoxy resin, glass fiber, etc. through a composite process), it becomes soft at the melting temperature of the solder, and cannot provide a uniform response to each part of the circuit board. Elasticity; and in order to obtain sufficient resilience, the impactor bracket must push the circuit board very high, which cannot be effectively disassembled for longer plug-in components

Its disadvantages are: because the circuit board cannot be well sealed when it is installed in the device, and there are many through holes such as mounting holes and pin jacks on the substrate itself, hot air is constantly blown into the surface of the circuit board. Under normal circumstances, the lower surface of the circuit board is not easy to generate a large negative pressure, so the removal effect of the plug-in components is not good

The disadvantage is that the circuit board needs to be clamped by the clamping device to turn it over, but generally there is not enough space on the circuit board for clamping, so it is necessary to remove more components in advance, making the preparation for disassembly time-consuming and laborious. Or it needs to occupy the clamping space and damage some components; moreover, because the circuit board has softened at high temperature, the impact is implemented by rotating the impact parts, the impact force is small, and the disassembly effect on components is not good.

Its disadvantages are: the plug-in components cannot be disassembled; due to the limited heating area of ​​the strip nozzle, if the area of ​​the patch components is large, the disassembly effect will be affected; the flux that falls last will stick to the components that fell first, making Components and flux are not separated

However, using the vibration method, although larger SMD components can be disassembled, for some SMD components with small mass and volume, the disassembly effect is not good because the disassembly energy is not large enough.

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