What are the factors affecting the Mold Production Of Ceramic Products?
A lot of Mold Production Of Ceramic Products before open mold always will ask, how long is mold service life? Can you load the counter? Today, we discuss some factors that can affect the life of the mould and the use of mould.
The service life of the ceramic mold production usually we require in 30 to 500000 beer time, minimum requirements are generally above 300000 bei, if production big insurance advice copy mode, can reduce the fatigue using a set of mould, also can save a lot of time in the process of production. What are the reasons for the failure of mold production of our ceramic products? The causes of failure in normal use of mould can be summarized from five aspects: the influence of comprehensive factors, fatigue, cold and heat fatigue, the failure of plastic deformation and wear.
(1) failure under the influence of comprehensive factors
The production of ceramic products is very complicated because of the actual working conditions, and the components cooperate with each other. Therefore, there are many kinds of damage in the mould. Once these injuries occur, they may promote each other and eventually accelerate the failure of the mold. Therefore, we must not neglect some small problems in the process of mold making, thinking that it doesn't matter, the so-called thousand-li dike, destroyed in the nest. The mold can be very beautiful, whether it is the clasp or the assembly structure, the test mode, the small batch production is smooth. However, it is possible that the mass production is caused by a small row activity that causes a big problem.
(2) fatigue failure of the mould
The root cause of die fatigue failure is stress concentration and cyclic loading. Although sometimes the load of the mould is significantly lower than the yield strength, but Mold Production Of Ceramic Products as a result of local stress concentration, make under low load, the stress concentration place still can form micro cracks. And mould is usually served in the condition of high strength and low plasticity, when micro cracks formation, in the mold of cyclic loading, the micro cracks are easy to expand and eventually lead to fatigue, fracture.
(3) the cold and heat fatigue of the mould is invalid
For some Mold Production Of Ceramic Products, such as engineering plastic PC, PMMA, PA and add some special auxiliary materials such as lead, such as aluminum mold, and highlights the requirements of the mould appearance, usually require mould hot work, work with plastic solution temperature of heat transfer in the mold cavity, caused the mold surface temperature often rose to the range of 200 ~ 300 ℃. In order to remove the mold and the cooling effect, we usually add cooling water channel to the core to cool it. This cycle, is the mould surface again and again through the process of thermal shock, the mold surface and accumulated considerable cyclic thermal stress, the stress finally released in the form of cold and hot fatigue, formation of cold and hot fatigue crack. As for high temperature oxidation, the friction between the mold and the high temperature is accelerated the process of cold and heat fatigue.
(4) failure of plastic deformation
It is very important to select materials in mold making, and the strength level of Mold Production Of Ceramic Products. The heat treatment process is not correct and fails to achieve the best toughness of the steel. Improper use of die caused local overload; The high temperature softening of the ceramic mould can also cause thermoplastic deformation failure. The failure of the shaping deformation can lead to the deformation of the mold, thus affecting the quality of the plastic parts.