Sun May 28 18:06:55 CST 2023
Maintenance of moulds
1：Molds must be ground edge after a long time use, grinding the edge surface must be demagnetized, can not be magnetic, otherwise prone to blocking. Mold using enterprises should do detailed records, statistics of its use, care (lubrication, cleaning, rust prevention) and damage, according to which can be found which parts, components have been damaged, the degree of wear and tear size, in order to provide information information to find and solve the problem, as well as the molding process parameters of the mold, the materials used in the product, in order to shorten the trial run time of the mold and improve production efficiency. Should be in the normal operation of the injection molding machine, mold, test a variety of mold performance, and the size of the final molded plastic parts measured out, through this information can determine the existing state of the mold, to find out the cavity, core, cooling system and parting surface damage, etc., according to the information provided by the plastic parts, you can determine the damage state of the mold and maintenance measures.
2: Spring and other elastic parts in the use of the spring is the most vulnerable to damage, usually fracture and deformation phenomenon. The approach taken is to replace, in the process of replacement must pay attention to the specifications and model of the spring, the specifications and model of the spring through the color, outside diameter and length of the three to confirm, only in the case of the three are the same can be replaced. Spring to import the quality is better.
3: The punch is prone to breakage, bending and gnawing during the use of the die, and the punching sleeve is generally gnawed. Punch and punch sleeve damage are generally replaced with parts of the same specifications. The parameters of the punch are mainly working part size, mounting part size, length size, etc.
4: Fastening parts, check whether the fastening parts are loose, damaged phenomenon, the approach taken is to find the same specifications of the parts for replacement.
5: pressure material parts such as pressure plate, urethane, etc., unloading parts such as stripping plate, pneumatic top material, etc. Maintenance check the relationship between the parts of the accessories and whether there is damage, the damaged parts to repair, pneumatic top material check whether there is air leakage, and take measures for the specific situation. If the air tube is damaged for replacement. To focus on several important parts of the mold tracking test: ejector, guide parts to ensure that the mold open and close movement and plastic parts ejected, if any of these parts due to damage and stuck, will lead to stop production, so should always keep the mold ejector, guide column lubrication (to use the most suitable lubricant), and regularly check whether the ejector, guide column, etc. deformation and surface damage, once found, to be replaced in a timely manner; complete After a production cycle, we should coat the working surface, moving and guiding parts of the mold with professional anti-rust oil, especially we should pay attention to the protection of the bearing parts of the mold with gears and racks and the elastic strength of the spring mold to ensure that it is always in the best working condition; as the production time continues, the cooling channel is easy to deposit scale, rust, silt and algae, etc., so that the cooling channel cross section becomes smaller and the cooling channel becomes narrower, which greatly reduces the The heat exchange rate between coolant and mold, increase the production cost of enterprises, so the cleaning of the runner should be paid attention to; for the hot runner mold, heating and control system maintenance is conducive to prevent the occurrence of production failure, so it is particularly important.