Dry ice cleaning method

Abstract

The invention belongs to the technical field of die cleaning, and particularly relates to a dry ice cleaning method. A cold spraying gun is utilized for spraying dry ice particles to dirt on the surface of a to-be-cleaned die, the length of a barrel of the cold spraying gun can be increased, and the end, close to a nozzle, of the barrel of the cold spraying gun can be bent to different angles so that the cold spraying gun can adapt to clean different dirt positions of the to-be-cleaned die. The method is applicable to cold spraying guns of nozzles different in type, specification and material.According to the dry ice cleaning method, the low-temperature impact condition of dry ice is utilized, a dirt layer is swept and peeled off, and dirt is removed.

Description

technical field [0001] The invention relates to the technical field of mold cleaning, in particular to a dry ice cleaning method. Background technique [0002] In the prior art, mold washing strips, mold cleaning strips, mold moistening strips or mold washing water are generally used to clean semiconductor packaging molds, integrated circuit ICs, LEDs, and packaging systems. When cleaning with mold cleaning strips, mold cleaning strips or mold washing water, it is necessary to heat the mold first, press the mold cleaning strips into the groove of the mold, and use the mold cleaning strips to stick the dirt on the surface of the mold and take it out. For some difficult-to-clean corners on the mold, in addition to using mold cleaning strips, mold cleaning strips, mold strips or mold washing water, alkaline chemicals are used to clean the mold. When cleaning the mold with the above method, the mold needs to be disassembled , Dismantling a set of molds is not only time-consumin...

AI Technical Summary

Problems solved by technology

When cleaning with mold cleaning strips, mold cleaning strips or mold washing water, it is necessary to heat the mold first, press the mold cleaning strips into the groove of the mold, and use the mold cleaning strips to stick the dirt on the surface of the mold and take it out. For some difficult-to-clean corners on the mold, in addition to using mold cleaning strips, mold cleaning strips, mold strips or mold washing water, alkaline chemicals are used to clean the mold. When cleaning the mold with the above method, the mold needs to be disassembled , Dismantling a set of molds is not only time-consuming and labor-intensive, but also easily causes damage during the disassembly process. The cost of a set of molds is tens to several million, and the cost of damage is huge.

The mold strips, mold strips, and mold strips used in traditional cleaning methods need to be hot-melted and cooled, which is very time-consuming. The time spent on hot-melting and cooling the mold strips and mold strips will account for 10% of the entire cleaning process. Nearly 50%, the production efficiency is extremely low

In addition, mold washing water and alkaline chemicals are also easy to cause damage to the metal surface, requiring re-plating and increasing maintenance costs

In addition, the toxic substances in alkaline chemical agents are likely to cause safety hazards to workers and endanger the health of workers, and the discharge of alkaline chemical agents will also cause environmental pollution problems