WO2019080642A1 - Procédé de nettoyage à la glace sèche - Google Patents

Procédé de nettoyage à la glace sèche

Info

Publication number
WO2019080642A1
WO2019080642A1 PCT/CN2018/103393 CN2018103393W WO2019080642A1 WO 2019080642 A1 WO2019080642 A1 WO 2019080642A1 CN 2018103393 W CN2018103393 W CN 2018103393W WO 2019080642 A1 WO2019080642 A1 WO 2019080642A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
dry ice
cleaned
spray gun
cleaning
Prior art date
Application number
PCT/CN2018/103393
Other languages
English (en)
Chinese (zh)
Inventor
张青竹
Original Assignee
张青竹
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张青竹 filed Critical 张青竹
Publication of WO2019080642A1 publication Critical patent/WO2019080642A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass

Definitions

  • the invention relates to the field of mold cleaning technology, in particular to a dry ice cleaning method.
  • a semiconductor package mold, an integrated circuit IC, an LED, and a package system are generally cleaned by using a mold strip, a clear mold strip, a mold strip, or a mold wash water.
  • a washing strip, a clearing strip or a washing water it is necessary to heat the mold first, press the washing strip into the groove of the mold, and use the washing strip to stick the dirt on the surface of the mold for cleaning.
  • the mold is cleaned with an alkaline chemical.
  • Disassembly and assembly of a set of molds is not only time-consuming and labor-intensive, but also the mold is easy to cause damage during the disassembly process.
  • the cost of a set of molds is tens to millions, and the damage cost is huge.
  • the traditional cleaning method adopts the washing strip, the clearing strip and the running strip, which need hot melt and cooling, which is very time consuming, and the time taken for hot melting and cooling of the washing strip and the clearing strip takes up the entire cleaning process time. Nearly 50%, production efficiency is extremely low.
  • the washing water and alkaline chemicals are also likely to cause damage to the metal surface, requiring re-plating and increasing maintenance costs.
  • the present invention provides a dry ice cleaning method capable of safely, efficiently, environmentally and economically cleaning a semiconductor package mold, saving washing time and improving production efficiency.
  • the technical solution of the present invention is: Providing a dry ice cleaning method, comprising the following steps:
  • Step 1 heating the mold to be cleaned
  • Step 2 Obtain a corresponding amount of dry ice from the stored dry ice according to the degree of dirt on the surface of the mold to be cleaned;
  • Step 3 Hold the cold spray gun, press the cold spray gun button, point the nozzle on the dirt surface of the mold to be cleaned, spray dry ice particles, and make the surface dirt freeze to embrittlement and burst.
  • the mold to be cleaned is any one of a semiconductor package mold, a photoelectric mold, and a microelectronic mold.
  • the barrel of the cold spray gun can be correspondingly lengthened according to the actual cleaning needs of the mold to be cleaned.
  • the end of the barrel of the cold spray gun near the nozzle can be bent at different angles to accommodate the cleaning of different dirt locations of the mold to be cleaned.
  • the gun handle of the cold spray gun is provided with an impact-proof buffer structure, and the buffer structure is made of any one or a combination of cotton cloth, rubber cushion or elastic plastic.
  • dry ice cleaning is the use of physical principles to clean the mold, cleaning speed, no damage to the mold, thus avoiding the use of traditional washing strips, clear mold strips or mold strips or washing water and alkaline chemicals
  • the cleaning method brings waste of multiple electroplating, reduces costs, does not generate harmful gases, does not cause secondary pollution, and is safe and environmentally friendly.
  • the cold spray gun can be used for fixed-point cleaning of specific parts of the mold, which does not need to be cleaned every time, which is very economical and convenient.
  • the method is suitable for the cleaning of semiconductor packaging molds, photoelectric molds and micro-electronic molds. It has a good cleaning effect on LED molds and integrated circuit IC molds, and has a broad market prospect.
  • a dry ice cleaning method comprising the following steps:
  • Step 1 heating the mold to be cleaned
  • Step 2 Obtain a corresponding amount of dry ice from the stored dry ice according to the degree of dirt on the surface of the mold to be cleaned;
  • Step 3 Hold the cold spray gun, press the cold spray gun button, point the nozzle on the dirt surface of the mold to be cleaned, spray dry ice particles, and make the surface dirt freeze to embrittlement and burst.
  • the mold to be cleaned is any one of a semiconductor package mold, a photoelectric mold, and a microelectronic mold.
  • the barrel of the cold spray gun can be lengthened according to the actual cleaning needs of the mold to be cleaned.
  • the length of the straight pipe section of the barrel is 25cm-40cm, and the end of the barrel of the cold spray gun near the nozzle can be bent into different angles.
  • the nozzle material is one of stainless steel or aluminum alloy or nylon composite material or alloy material, and the inner diameter of the nozzle is 0.6cm or 0.8cm, in order to meet the cleaning of the different dirt of the mold to be cleaned (the material is stuck in the production process).
  • the front end of the cold spray gun body can be directly screwed to nozzles of different specifications and materials to suit the cleaning of different specifications of the mold, and the nozzles of different model specifications include a circular nozzle or a nozzle tube with different bending angles of the nozzle tube body.
  • the rectangular nozzles with different bending angles are made of nylon composite material or aluminum alloy or stainless steel or alloy material.
  • a circular nozzle is generally used.
  • the cold spray gun realizes point-to-point cleaning and the cleaning position is accurate.
  • a cold spray gun with a rectangular nozzle is generally selected, and the dry ice particles sprayed from the rectangular nozzle are sprayed into the dirt in a rectangular strip.
  • the surface, the contact area with the mold surface is increased, the cleaning force is increased, and the cleaning time is saved.
  • the cold spray gun can be operated by hand, or can be cleaned by installing the moving bracket on the dirty surface of the cleaning mold driven by the moving bracket.
  • Cold spray gun working principle The dry ice particles are accelerated to supersonic speed by compressed air and sprayed onto the surface of the mold to be cleaned.
  • the spray medium dry ice particles
  • the spray medium is accelerated by the high-pressure airflow, and is sprayed through the nozzle to impact the surface of the mold to be cleaned, effectively removing the target dirt.
  • the dry ice pellets have extremely low temperatures and are used for decontamination cleaning to create a temperature difference between the cleaning surface contamination layer and the adhered substrate layer. Since different materials have different coefficients of thermal expansion, the surface contamination layer and the adhered substrate layer The temperature difference between them will destroy the physical bond between the two materials, and the adhesion layer will be cracked and embrittled by the difference in shrinkage.
  • the dry ice ruptures and enters the crack at the same time, and the volume expands nearly twice in a few thousandths of a second, causing a “micro explosion”, which sweeps off the dirt layer and removes dirt.
  • the pollution layer on the surface of the cleaning material is cracked. Due to the strong temperature difference, the crack of the pollution layer is intensified, the debris of the pollution layer begins to peel off, the dry ice sublimes in a few thousandths of a second, and the volume expands nearly 600-800. Double, causing a "micro explosion”, sweeping off the dirt layer and removing dirt.
  • the cold spray gun of the present invention has a buffer structure on the handle, and the cushion structure is made of cotton. Any one or combination of cloth, rubber cushion or elastic plastic.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Detergent Compositions (AREA)

Abstract

Un procédé de nettoyage a la glace sèche comprend les étapes suivantes consistant à : chauffer un moule à nettoyer; acquérir une quantité correspondante de glace sèche à partir d'un stockage de glace sèche sur la base de l'encrassement de la surface du moule à nettoyer; à porter à la main un pistolet de pulvérisation à froid, à presser un bouton sur le pistolet de pulvérisation à froid, à viser une buse au niveau de la surface sale du moule à nettoyer, et à pulvériser des particules de glace sèche, à refroidir ainsi rapidement les salissures sur la surface à des fins de fragilisation et d'éclatement. Le procédé de nettoyage à la glace sèche utilise de la glace sèche pour une condition d'impact à basse température pour souffler et décoller une couche de saleté, éliminant ainsi la saleté.
PCT/CN2018/103393 2017-10-20 2018-08-31 Procédé de nettoyage à la glace sèche WO2019080642A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201710982871 2017-10-20
CN201711002902.9 2017-10-24
CN201711002902.9A CN107876513A (zh) 2017-10-20 2017-10-24 一种干冰清洗方法

Publications (1)

Publication Number Publication Date
WO2019080642A1 true WO2019080642A1 (fr) 2019-05-02

Family

ID=61782360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/103393 WO2019080642A1 (fr) 2017-10-20 2018-08-31 Procédé de nettoyage à la glace sèche

Country Status (2)

Country Link
CN (1) CN107876513A (fr)
WO (1) WO2019080642A1 (fr)

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CN107876513A (zh) * 2017-10-20 2018-04-06 张青竹 一种干冰清洗方法
CN108856714B (zh) * 2018-05-29 2020-12-11 东莞华晶粉末冶金有限公司 一种去除金属粉末注射成型生坯的披锋的方法
CN109174832A (zh) * 2018-09-10 2019-01-11 力信（江苏）能源科技有限责任公司 一种锂离子电池注液口结晶电解液的清洁方法
CN111073456A (zh) * 2019-12-30 2020-04-28 江苏艾德卡建材科技有限公司 一种用于油污地面上的环氧地坪底涂涂料

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CN2575595Y (zh) * 2001-12-24 2003-09-24 厦门和丰利干冰除污设备有限公司 用于有机载体加热炉的干冰清洗装置
CN1970176A (zh) * 2006-12-08 2007-05-30 上海松下等离子显示器有限公司 用于蒸镀设备的干冰洗净法
CN102380491A (zh) * 2011-08-01 2012-03-21 迪普干冰制造(大连)有限公司 一种加热吸尘搭配干冰清洗的表面脱漆处理设备及方法
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CN203526152U (zh) * 2013-10-15 2014-04-09 迪普干冰制造(大连)有限公司 加热吸尘搭配干冰清洗的表面脱漆处理设备
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