1: Molds must be ground after a long period of use edge, grinding edge surface must be demagnetized, can not be magnetic, otherwise easy to plug. Mold using enterprises to make detailed records, statistics of its use, care (lubrication, cleaning, rust) and damage, according to which can be found which parts, components have been damaged, the size of the degree of wear and tear, in order to provide the discovery and solve the problem of information material, as well as the mold molding process parameters, the product used in the material, in order to shorten the trial time of the mold to improve the efficiency of production. Should be in the injection molding machine, mold normal operation, test the various properties of the mold, and the final molding of the plastic part size measurement, through this information can determine the existing state of the mold, to find out the cavity, the core, the cooling system, and the damage to the parting surface, etc., according to the information provided by the plastic parts, you can determine the damage state of the mold and repair measures.

2: springs and other elastic parts in the use of the spring in the process of the most vulnerable to damage, usually fracture and deformation phenomenon. The approach taken is to replace, in the replacement process must pay attention to the specifications and models of springs, spring specifications and models through the color, outside diameter and length of three items to confirm that only in the case of three are the same can be replaced. Spring to import the best quality, the famous brand has Raymond mold spring and so on.

3: The punch is easy to break, bend and gnaw bad phenomenon in the process of mold use, and the punch sleeve is generally gnaw bad. Damage to the punch and punch sleeve are generally replaced with parts of the same specifications. The parameters of the punch mainly include the size of the working part, the size of the mounting part, the length size and so on.

4: fastening parts, check whether the fastening parts are loose, damage phenomenon, the approach taken is to find the same specifications of the parts to be replaced.

5: Pressure parts such as pressure plate, Yuli rubber, etc., unloading parts such as stripping plate, pneumatic ejector, etc.. Maintenance check the parts of the accessories relationship and whether there is no damage to the damaged part of the repair, pneumatic ejector check whether there is no air leakage phenomenon, and take measures for the specific situation. If the air tube is damaged, replace it. To several important parts of the mold to focus on tracking and testing: ejector, guide parts of the role is to ensure that the mold open and close the movement and plastic parts ejection, if any part of it due to damage and stuck, will lead to production stoppage, it should be often to keep the mold ejector, guide lubrication (to choose the most suitable lubricant), and regularly check the ejector, the guide, such as whether the ejector and the deformation of the surface damage, once found, it is necessary to replace in a timely manner; completion of a production cycle, it is necessary to check the mold, guide and other parts of the mold to see if they are damaged. After a production cycle, the mold surface, movement, guiding parts coated with professional anti-rust oil, especially should pay attention to with gears, rack mold bearing parts and spring mold elastic strength of the protection to ensure that it is always in the best working condition; with the continuation of the production time, the cooling channel is easy to deposit scale, corrosion, silt and algae, etc., so that the cooling runners cross-section becomes smaller, narrowing of the cooling channel, greatly reducing the heat exchange between the coolant and the mold, the cooling channel, and so on, and so on. The heat exchange rate between the coolant and the mold, increase the production cost, so the cleaning of the runner should pay attention to; for hot runner molds, heating and control system maintenance is conducive to preventing the occurrence of production failures, so it is particularly important.