How to learn how to clean plastic molds2020-03-23
Any product needs to have correct maintenance knowledge, and mold products are no exception. As a key process of mold maintenance and maintenance-mold cleaning, it has a very important impact on mold maintenance. Jiehui Chuang Xiaobian will share some plastics Knowledge of mold cleaning.
1. Standardized cleaning procedures
Penyelenggaraan acuan sistematik didasarkan pada keperluan penyelenggaraan dan kesinambungan operasi pembaikan. Untuk mencapai tujuan "menjimatkan kos", membersihkan acuan mesti memberi perhatian kepada: menyusun rancangan pembersihan acuan terperinci. Semasa membersihkan bahagian-bahagian acuan yang berbeza, seperti membersihkan bahagian dalam mesin cetak, mengelap tepi, membersihkan konvensional, dan membersihkan bahagian-bahagian utama, kaedah operasi pembersihan yang digunakan juga berbeza.
Setelah acuan berjalan untuk jangka masa tertentu dan setelah ujian penampilan seperti kehausan galvanik, tanda jejak, dan kandungan residu acuan di kawasan yang dilapisi dan tidak berventilasi, juruteknik dapat menentukan prosedur dan kekerapan pembersihan acuan melalui pemeriksaan visual. Oleh itu, sangat penting untuk memahami kitaran operasi acuan yang selamat, dan untuk mengarkibkan laporan pemerhatian mengenai pengumpulan sisa dan keausan di dalam acuan.
Based on the mold has a certain operating cycle, all molds should be accompanied by relevant maintenance procedures and documentation of the maintenance cycle. In general, controlling internal grease levels and gear broaching, sliders, internal pins and bushings, and other operating conditions of moving parts is the key to stable production. Other factors affecting production include contamination or blockage of waterlines and water jets, leaking manifolds, rust and corrosion due to leaks or condensation.
2. What level of cleaning is enough
Generally, when the molding process operation is completed, dirt or residues are often left on the mold. For different types of residues, the final cleaning requirements are different. Resins such as polyvinyl chloride generate hydrogen chloride gas, which can corrode many types of mold steel. Other residues are separated from flame retardants and antioxidants and can cause corrosion to steel. There are also pigment stains that rust the steel and the rust is difficult to remove. Even ordinary storage water can cause damage to the mold if it is left on the surface of the untreated mold for too long.
Therefore, the necessary cleaning of the mold should be carried out according to the established production cycle. After each time the mold is removed from the press, the mold air holes need to be opened first to remove all oxidized dirt and rust on the non-critical areas of the mold and the template to prevent it from slowly corroding the surface and edges of the steel. In many cases, even after cleaning, some uncoated or rust-prone mold surfaces will soon show rust again. Therefore, even if it takes a long time to brush the unprotected mold, the surface rust cannot be completely avoided.
Many molds now have "self-cleaning" vent lines that have a high gloss. Vent holes are cleaned and polished to the level of SPI # A3, or by milling or grinding, the residue is discharged to the garbage area of the ventilation pipe to prevent the residue from adhering to the surface of the roughing mill stand . However, if the operator manually grinds the mold with a coarse-grained brushing pad, emery cloth, sandpaper, abrasive stone, or brush with nylon bristles, brass or steel, it will cause excessive cleaning of the mold.
Generally, when hard plastics, glass beads, walnut shells and aluminum pellets are used as abrasives for high-pressure crushing and cleaning of mold surfaces, if these abrasives are used too frequently or improperly, this grinding method will also Pores are created on the surface of the mold, and residues are liable to adhere to them, leading to more residue, wear, or premature fracture or burrs of the mold, which is even more difficult to clean the mold.
Therefore, by finding cleaning equipment suitable for the mold processing technology, and referring to the cleaning methods and cleaning cycles recorded in the archives, maintenance time can be saved, and at the same time, mold wear can be effectively reduced.