Mould plastics mould maintenance
December 2nd, 2009 in Cancer, Health by mold
Mould plastics mould compared with other moulds, have more complicated accurate structures, to operate and maintain the expecting just much of product, so in the course of producing entirely, use and meticulous maintenance that is solving, maintain it to maintaining enterprise’s normal production, improve enterprise’s benefit, have very important meanings.
First, choose the shaping apparatus suitable, confirm the rational process conditions, if the moulding plastics machine is too too small to meet the demands, it is the waste of the energy to be too big, and will also damage the mould or template because of shutting mould strength and regulating improperly, while make efficiency reduce. Unless it choose at the time of injecting machine, should until most the injecting amount more,pull rod the effective from,template last size mould, most big mould thick, minimum mould thick, template journey, carry way of happening, carry journey of producing, inject the pressure, shut several such as mould strength to verify, Men’s foot can be used after being required. Confirming rationally it is one of the correct contents of using the mould too of process conditions, lock mould to be strength too heavy, inject pressure to be too high, speed that inject too fast, mould warm and too higher to can do harm to service life of mould.
After installing the injecting machine with second, mould, should operate the empty mould first. Observe whether its every position operation movement is flexible, whether have abnormal phenomena, is time the type identical and tight to carry the journey out and open the journey to put in place and shut the mould, whether the pressing plate screw is tightened etc..
Third, mould, when the use, want, keep normal temperature, can’t cold one minute and hot next, work when being normal and warm, can lengthen the service life of mould.
Fourth, sliding part on the mould, core of the needle, push rod, type,etc. such as leading the column, going back, should observe at any time, check regularly, scrub and annotate and lubricate the oil in right time, especially when temperature is higher in summer, per tour add two oil at least, so as to ensure slippery moveable piece these sport flexible, prevent from, kill while being astringent while being urgent.
Fifth, should notice whether clean out in type, is absolutely forbidden to leave the residual products in front of the lock mould each time, any other foreign matter, forbid, use hard tool clear up, so as not to damage type of surface.
Sixth, type and one of surfaces have moulds of the special requirement, the roughness Ra of surface is less than or equal to 0.2cm, absolutely can’t wipe with hand or cotton silk wipe, employ compressed air blow, or alcohol wipe, wipe gently dip in with advanced medicated napkin and advanced cotton wool.
Seventh, type and one of surfaces should be washed regularly, injecting the mould will often decompose low molecular compounds out to corrode mould type in shaping, make one of surfaces of bright type make the intense darkness without light and reduce products quality gradually, so need to scrub regularly, scrubing can use alcohol types or ketone preparation to dry up in time after being scrubed.
Eighth, operate and leave it while needing to shut down temporarily, should close the mould to close, the allowing type core of and type is exposed outside, in order to avoid accidental injury, the time of shutting down estimates for over 24 hours, the surface of core sprays and antirusts the oil or pharmaceutical of drawing of patterns to want, type in the type, especially in moist area and rainy season, time is shorter but antirusted. The steam in the air will make a of surface quality of mould reduce, products surface quality drop. When the mould is used again, should remove the oil on the mould, can use after wiping clean, the washing compressed air that has surface of the mirror to require is and then dried up with the hot wind after being dried up, otherwise will ooze out and make the products present the defect when shaping.
Ninth, start the machine after shut down temporarily, should check whether the location of slippery limits is moved after opening the mould, finding abnormality has shut the mould. In a word, must be careful before starting the machine, can’t be careless.
10, lengthen the service life cooling the water course, when the mould is stopped using, should remove water cooled in the water course with the compressed air immediately, put and chew the muzzle with a small amount of engine oil, and then blow with the compressed air, make all have one layer to antirust oil reservoirs to cool the pipeline.
11th, check every working state of controlling the part conscientiously in the work, prevent the accessory system strictly from taking place unusually, heat, the maintenance of the control system is particularly important to thermal current a mould. After every production cycle, should to getting excellent heater, leading type heater, the electric thermocouple is studied and measured with Ou’s mother, compare with technological detail file of the mould, so as to ensure its function is intact. Meanwhile, controlling the return circuit may be tested through the ampere meter that is installed in the return circuit. Release the oil in the hydraulic jar used for core to empty as much as possible, seal glibly, in case that the environment that the hydraulic oil lets out or pollutes around in warehousing and transportation.
12th, hear the mould give out different sound or present other unusually situations in producing, should shut down and check immediately. The mould maintenance personal will carry on the touring inspection to the mould of normal running in the workshop, while finding that there is an unusual phenomenon, should deal with in time.
13th, operate engineering while relieving, except hand over and produce, close recording critically outside in craft, use the state to have detailed explaining to the mould too.
14th, when the mould finishes products production quantity, get off the plane to change other moulds, should spread rust inhibitor mould type, deliver mould his attachment to the person who maintains mould, enclose the last and produce products qualified to deliver to the persons who maintain together as each. In addition, should also deliver to a mould and use the list, fills in this mould on some lathes in detail, since the somth of some month of some year, how many quantity products are produced together, the mould is good now. If the mould is problematic, have any problem to deserve the mould to fill in in using the form, put forward the concrete requirement revised and improved, hand over to a sample not dealt with to give to the storekeeper, consult while repairing the mould for the mould worker.
15th, should set up the mould storehouse, have the special messenger to manage, build and set up the mould file, if probably to manage the computer to the mould. Should choose the little ventilated place of the moisture in the mould storehouse, temperature should keep in under 70%, if the humidity exceeds 70%, then the mould is very apt to get rusty, the mould should be put on the shelf and preserved, pay attention to the prevention of corrosion, dustproof. It takes the identification that is repaired, maintained to mark and repair or finish.