Mold maintenance

1: mold for a long time after use must be grinding edge, grinding edge must be demagnetized, can not be with magnetic, or prone to blocking materials. Mold use companies to do a detailed record, statistics of its use, care (lubrication, cleaning, rust) and damage, which can be found in which parts, components are damaged, the degree of wear to provide information to find and solve the problem, As well as the molding process parameters of the mold, the product used to shorten the mold test time, improve production efficiency. Should be in the injection molding machine, mold normal operation, the test mold a variety of performance, and the final shape of the plastic parts measured by this information can determine the existing state of the mold, find the cavity, core, cooling system and Sub-surface and other damage, according to the information provided by plastic parts, you can determine the damage to the mold state and maintenance measures.
2: spring and other flexible parts in the course of the most vulnerable to damage the spring, usually the phenomenon of fracture and deformation. Take the approach is to replace the spring in the replacement process must pay attention to the specifications and models, spring specifications and models through the color, diameter and length of the three to confirm that only in the three cases are the same circumstances can be replaced. The quality of the spring is better for the import.
3: mold used in the process of punching prone to break, bend and bite bad phenomenon, punch sets are generally bite bad. Punch and punch sets of damage are generally the same specifications of the parts to be replaced. Punch the main parameters of the working part of the size, installation part of the size, length and size.
4: fasten the parts, check the fastening parts are loose, damaged, the way is to find the same specifications of the parts to be replaced.
5: press material parts such as pressure plate, gifted of plastic, such as stripping parts, such as stripping board, pneumatic, such as materials. Maintenance, check the parts of the accessories and the relationship between the damage to the damaged part of the repair, pneumatic materials to check whether the leak phenomenon, and the specific circumstances to take measures. Such as tracheal damage to replace. To focus on several important parts of the mold to track the detection: the role of ejection, guide parts to ensure that the mold opening and closing movement and plastic parts of the top, if any part of the damage due to injury and stuck, will lead to shutdown, it should always keep Mold thimble, guide column lubrication (to choose the most suitable lubricant), and regularly check the thimble, guide column, etc. whether the deformation and surface damage, once discovered, to be replaced; complete a production cycle, the mold work surface , Sports, guide parts coated with professional anti-rust oil, with particular emphasis on gears, rack mold bearing parts and spring mold elastic strength protection to ensure that it is always in the best working condition; with the production time , The cooling channel easy to deposit scale, rust, sludge and algae, so that the cooling channel cross-section smaller, narrow cooling channel, greatly reducing the coolant and mold heat exchange rate between the increase in production costs, so the flow of the clean-up Should pay attention to; for hot runner mold, the heating and control system maintenance is conducive to prevent the occurrence of production failures, it is particularly To.
Cause of loss
1) mold the main working parts of the material problems, improper selection. Material performance is bad, not wear; mold steel without refining, with a large number of smelting defects; convex and concave die, forging forging process is not perfect, surviving heat treatment hidden.
2) mold structure design problems, die structure is unreasonable. Slender punch is not designed to reinforce the device, the discharge port appears poor accumulation, unloading force over the ambassador to bear the alternating load intensified.
3) Modification process is not perfect, mainly in the convex, concave die forging quality, heat treatment technology and process problems, resulting in convex, concave die quenching, soft and uneven hardness. Sometimes produce micro-cracks, and even cracking, grinding and polishing is not in place, the surface roughness value is too large.
4) no lubrication or lubrication but poor results