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Sunland reminds you that it is necessary to understand the maintenance of moulds!
Source: | Author:佚名 | Published time: 2020-12-27 | 327 Views | Share:
Mold maintenance: The die must be sharpened after being used for a long time, and the edge must be demagnetized after grinding, which can not be magnetized, otherwise it is easy to block the material.
Mold maintenance: 
1: the die must be sharpened after being used for a long time, and the edge must be demagnetized after grinding, which can not be magnetized, otherwise it is easy to block the material. 
Mold users should make detailed records and statistics on their use, nursing (lubrication, cleaning, anti-rust) and damage, so as to find out which parts and components have been damaged and the degree of wear, so as to provide information for finding and solving problems. as well as the molding process parameters of the mold and the materials used in the products, so as to shorten the commissioning time of the mold and improve the production efficiency. 
Under the normal operation of the injection molding machine and the mold, the various properties of the mold should be tested, and the size of the final molded plastic parts should be measured, through which the existing state of the mold can be determined. The damage of the cavity, core, cooling system and parting surface can be found. According to the information provided by the plastic parts, the damage state and maintenance measures of the mold can be judged. 
2: springs and other elastic parts are most easily damaged in the process of use, and the phenomena of fracture and deformation usually occur. 
The method adopted is to replace. In the process of replacement, we must pay attention to the specification and model of the spring. The specification and model of the spring are confirmed by color, outer diameter and length, and can be replaced only if the three items are the same. 
The quality of the imported spring is better. 
3: the punch is easy to break, bend and gnaw during the use of the die, and the punch sleeve is generally gnawed. 
The damage of punch and sleeve is generally replaced with parts of the same specification. 
The parameters of punch mainly include working part size, installation part size, length dimension and so on. 
4: fasten the parts and check whether the fastening parts are loose and damaged. the method is to find the parts of the same specification for replacement. 
5: pressing parts such as pressing plate, glue, etc., unloading parts such as stripping board, pneumatic jacking, etc. 
During maintenance, check the relationship of spare parts and whether there is any damage, repair the damaged parts, check whether there is air leakage by pneumatic jacking, and take measures according to the specific situation. 
Replace the trachea if it is damaged. 
It is necessary to focus on tracking and testing several important parts of the mold: the function of the ejection and guide parts is to ensure the opening and closing movement of the mold and the ejection of the plastic parts. if any part of it is stuck due to damage, it will lead to the suspension of production. therefore, the lubrication of the mold ejector pin and guide column should be kept regularly (the most suitable lubricant should be selected), and whether the ejector pin and guide post are deformed and surface damage should be checked regularly. Once found, it should be replaced in time. 
After completing a production cycle, professional antirust oil should be applied to the working surface, movement and guide parts of the die, and special attention should be paid to the protection of the elastic strength of the bearing parts of the die with gears, rack and rack and the spring die, so as to ensure that it is always in the best working condition. 
With the continuous production time, the cooling channel is easy to deposit scale, corrosion, sludge and algae, which reduces the section of the cooling channel, narrows the cooling channel, greatly reduces the heat exchange rate between the coolant and the mold, and increases the production cost of the enterprise. therefore, attention should be paid to the cleaning of runner; for hot runner molds, the maintenance of heating and control system is helpful to prevent production failures, so it is particularly important.