Hur man rengör ordentligt vid reparation av formsprutor?
Mold cleaning is a key process in mold maintenance and also a bottleneck restricting mold maintenance. Because the speed of mold manufacturing and development is much faster than the speed of mold cleaning, and the mold needs to be prepared for the next production immediately after rapid cleaning, the time left for mold cleaning is quite limited. Through the investigation of the factory, it was found that the molds arranged in the corridors and workshops in the factory almost ockuperade det begränsade driftsutrymmet för verkstaden, bara väntar på att bli städad .
Some companies directly reset the mold after the first production without any cleaning treatment and continue to use it for reproduction. If the plastic parts produced are clean, it means that there is no problem with the operation of the mold. Over time, a cultural concept of "temporary firefighting" will be formed within the company. Only when the accumulated residue in the mold affects the quality of the parts or the mold bär, formen måste rengöras och rengöringsprocessen går bara förbi .
When cleaning and repairing molds, some factories will hire some junior technicians or apprentices in the mold workshop to do some chores of cleaning molds and templates, and then the maintenance technicians will separate the molds and templates. But in fact, when cleaning molds and templates, the marks will be washed away, making it difficult for maintenance technicians to find and correct mold and part defekter .
Admittedly, cleaning molds does not require the talents of a senior mold maker, but it is completely inconsiderate to let a novice who is not familiar with the special functions and defects of the mold or the characteristics of the key sealing area of the mold be responsible for mold cleaning. Because the unreasonable distribution of mold cleaning work will lead to the continuous production of molds with performance defects, and because of the increase of grouting, burrs, Hörn, för tidig elektroplätering eller stålförskjutning, blandade formar osv.
Standardiserade rengöringsförfaranden
Systematic mold maintenance is based on maintenance requirements and the continuity of maintenance operations. In order to achieve the goal of "cost-effectiveness", it must be noted: Develop a detailed mold cleaning plan. When cleaning different parts of the mold, such as internal cleaning of the press, edge cleaning, general cleaning and cleaning of the main part, different cleaning methods are used.
After the mold has been running for a certain period of time, technicians can determine the procedure and frequency of mold cleaning by visual inspection of electroplating wear, magnetic marks, and the content of residues in the vent and non-vent areas of the mold. Therefore, it is very important to understand the cycle of safe operation of the mold and archive observation reports of residue accumulation and wear in the mold.
Since the mold has a certain operating cycle, all molds should be accompanied by relevant maintenance procedures and maintenance cycle documents. Generally speaking, controlling the internal grease level and the operating conditions of moving parts such as pull teeth, sliders, inner shaft pins and bushings is the key to ensuring stable production. Other factors that affect production include contamination or blockage of water lines and water spray nozzles, Läckage av grenrör, rost och korrosion orsakad av vattenläckage eller kondens, etc. . Vilken grad av renlighet räcker?
Usually after the molding process operation is completed, dirt or residue (with certain chemical composition and physical properties) will be left on the mold. Depending on the type of residue, the requirements for cleaning are also different. Resins such as PVC will produce hydrogen chloride gas, which will corrode various types of mold steel.
Other residues are separated from flame retardants and antioxidants, which will corrode steel. Some pigments and colorants can cause steel to rust, and rust is difficult to remove. Even ordinary sealing water can damage the mold if it is left on an untreated mold surface for too long.
So the mold should be cleaned according to the established production cycle. Each time the mold is removed from the press, the mold's air holes should be opened first, and all the oxidized dirt and rust in the non-critical areas of the mold and template should be removed to prevent it from slowly corroding the steel surface and edges. In many cases, even after cleaning, some uncoated or rusted mold surfaces Kommer snart att rost igen . Så även om du tillbringar mycket tid på att borsta oskyddade formar, kan ytrost inte undvikas .
Nu har många formar "självrensande" ventiler med en högglans . rengör och polerar ventilen till en polsk nivå av SPI#A3, eller släpper ut resterna till soporområdet för ventilen genom att malning eller slipning för att förhindra att resterna ska följa ytan på den grova kvarnen stativ. men om mangalleriet mangalt polera med en mögel co-co-kod, en-gram, en-gram, Em, Em, EM, Em, Em, Em, Em, Em, Em, Sandpapp, slipsten eller nylonborst, mässing eller stålborste, det kommer att orsaka överdriven "rengöring" av mögel .
I allmänhet, när du använder hård plast, glaspärlor, valnötskal, aluminiumbollar osv. Rengöring .
Genom att hitta rengöringsutrustning som är lämplig för formar och bearbetningsteknik och med hänvisning till rengöringsmetoder och rengöringscykler registrerade i de arkiverade filerna kan mer än 50% av underhållstiden sparas och mögelslitage kan minskas effektivt .}