The importance of injection mould maintenance and maintenance process

Injection mould for plastic injection products processing is the most important molding equipment, its quality fit and unfit quality directly related to the products quality. And, as a result of mold in injection molding processing enterprises occupy a large proportion in the cost of production, its service life directly about injection molding products cost. Therefore, improve the quality of injection mold, and good maintenance and maintenance, prolong the life cycle, is an important topic of the authors efficiency injection molding products processing enterprises.


due to injection molding products processing enterprise product variety, mold change more frequently, the completion of a production cycle, the mould warehouse generally kept until the next production cycle comes out again. But simply ignored the mould to save some of the processing enterprises, the rusting of the mold in the preservation period, the phenomenon such as surface finish fall, causing the deterioration of product quality, high rejection rate, some mould even difficult to reuse, the need to invest a lot of money buy new mould, caused great waste.


the data shows, the use and maintenance in the mold accounted for 15% ~ 20%, and factors affecting the service life of the injection mould service life can reach 800000 times, some foreign maintenance good mould can even be extended 2 ~ 3 times. But domestic enterprises due to ignore the maintenance, the service life of the injection mould is shorter, only about 1/5 ~ 1/3 abroad. Due to short service life of die steel processing waste time and energy, as well as the quality of product effect brought about by the loss of billions of yuan a year.


as a result, maintenance of injection mould is very important, specific as follows:


1.
processing enterprises should first give each pair of mould record card, detailed records, statistics of its use, care, Lubrication, cleaning, rust) And damage, which can be found on the basis of parts and components have been damaged, the wear degree of size, to find and solve the problem of information data, and the mould molding process parameters, the materials used for the product, so as to shorten the test time of mould, improve production efficiency.


2.
processing enterprises should be in the injection molding machine, mold under normal operation, all kinds of mold test performance, and the final shape of parts size measured, through which information can determine the existing state of mould, find out the cavity, core, cooling system and parting surface damage, according to the information provided by the plastic, can judge the mold damage status and maintenance measures.


3.
want to track: focus on several important parts mould ejection, guiding role is to ensure that the mold opening and closing movement and plastic ejection, if any of these parts stuck due to injury, will lead to stop production, so often should keep the mould thimble, guide post lubrication ( To choose the most suitable lubricant) And regularly check whether thimble, guide pin, etc the distortion and surface damage, once found, will change in time;


after completing a production cycle, do you want to work to the mold surface, sports, guide components coating professional rust-proof oil, especially should pay attention to with gear and bearing parts and spring rack mould stretch strength of protection, to ensure its always in the best working state;


with production last time, the cooling way is easy to deposit scale, rust, sludge and algae, decrease of cooling flow channel section, the cooling channel narrow, greatly reduced the heat exchange between the coolant and the mold rate, increase the production cost, so we should pay attention to clean up on passage; For hot runner mold, heating and maintenance of the control system is helpful to prevent the occurrence of production failure, so is particularly important.


as a result, each end of the production cycle in response to die band heater, heater, heating probe and thermocouple with ohmmeter measuring, if there are any damage, should change in time, and comparing with mould resume, recorded, in order to timely found the problem, the adoption of countermeasures.


4.
should attach great importance to the surface of the mold maintenance, it directly influence the surface quality of the products, the key is to prevent corrosion, therefore, choose a suitable anti-rust oil, high quality, professional becomes more and more important. After the mold to complete production tasks, should according to different injection to take different approaches to remove residual injection carefully, available copper rod, copper wire and professional mold cleaner to remove residual injection and other sediments in the mould, and then dried.


disable clear iron wire, steel and other hard objects, so as not to scratch the surface. If corrosive injection caused by rust point, to use grinding machine grinding and polishing, and professional rust-proof oil spray, and then put the mould in a dry, cool storage, no dust.


a through good maintenance and the maintenance of the mold, mold assembly, commissioning can shorten the time and reduce the production failure, make production running smoothly, to ensure product quality, reduce scrap loss, and reduce enterprise operating costs and fixed asset investment, at the beginning of the next production cycle, would be able to produce quality qualified products enterprises. Therefore, for injection molding products processing enterprises, in the case of the current market competition is intense, maintenance good mould, can help enterprises.