In our normal production process, for some products are relatively small and the requirements are not very high, there is no cooling water, which seems to have little impact. For example, when the moldcore is cracked, there is a water path through the crack. There is no way to repair it, so we can only produce without water. Some of them may not need to prolong the cooling time, some of them need to lengthen the cooling time, resulting in a longer production cycle and lower production efficiency. However, in the case of high product requirements, do not say no water, that is, after water is connected, The fluctuation of water temperature still plays an important role in the influence of products.
If the appearance and size requirements of the product are not very high, the low mold temperature filling mold mode is generally used, which can shorten the cooling time, so as to improve the production efficiency. And the high mold temperature filling mold mode can make the product cool uniformly and uniformly, which can prevent the internal stress and fracture caused by the excessive temperature difference, It can also improve the flow mark, binding line and other bad conditions of products.
Generally speaking, high mold temperature needs to be guaranteed by external equipment. Now there are more used in the market, such as mold temperature machine. Mold temperature machine can be divided into water type and oil type. The maximum working temperature of standard water type mold temperature machine is 120 ℃, and the maximum working temperature of high temperature water type mold temperature machine is 180 ℃
High mold temperature has the following advantages:
1, It is beneficial to obtain stable size
Due to the constant control of mold temperature and the equilibrium of product shrinkage, it is easier to control the size of the product, which is conducive to improving the size accuracy
2, Good for cavity filling
For the plastic with poor fluidity and high viscosity, increasing the mold temperature can improve its filling performance and save the production cycle time. Fast filling can greatly improve the bad conditions of the product, such as flow mark and binding line
3, For the best look
The lower the mold temperature, the faster the plastic cools in the mold, and the poorer the fluidity. Only by adding the mold temperature, can we get a better mold appearance and restore the traces on the surface of the mold. The polished finish of the mold will completely show on the product
4, Good for product demoulding
For transparent products with high mold temperature in the common mold cavity or slider core, the force of encapsulation is much smaller than that of low mold temperature, especially for products similar to vacuum adsorption
