Does the injection machine have to use cooling water?
First, the injection molding machine normally work, it is necessary to cooling water.Two. Cooling water is related to the specific heat of molding material, the temperature and weight of melt and the temperature at the time of demoulding. The formula for the required ice water energy of a mold is Q=W * C * T * S. Among them:Q is the required ice water energy kcal / h;W for plastic raw material, weight kg / h;C is a plastic raw material with a specific heat of kcal / kg DEG c;T is the temperature difference between the temperature of the melt and the demoulding of the product;S is the safety factor (usually 1.35 - 2).When a single machine match, the general choice of small values, and when a cold water machine with a number of molds to match when the big value, such as the selection of air-cooled chillers, S should also be elected a big point.
Three. The temperature difference of the ice water at the inlet and outlet of the mold is usually set according to the requirements of the product. In many cases, the temperature difference is 3-5 degrees centigrade, which is ideal, but sometimes the temperature difference is 1-2 degrees centigrade. The smaller the temperature, the greater the amount of ice water required to bring out the same amount of heat, and the less needed traffic. For example: when the temperature difference is 5 degrees centigrade, the flow rate needs 60L, but when the temperature difference is 2 DEG C, the flow rate needs 150L.Four, ice water flow: a pair of mold required water flow directly with the mold to take away the heat and ice water and the temperature difference between the mold. For example: 6480 kcal / h heat from the die away, if the temperature is 3 DEG C, water flow Q=6480 / 3 / 60=36 (L / min).Five, water temperature of cooling fluid (water): mould temperature is generally subject to the processing of materials and products shape changed greatly, such as polystyrene thin beaker, die ice water temperature at 0 DEG C; and in most cases, the mold required ice water in the temperature of 5 DEG C, a full function of cold water can provide the above 5 degrees of ice water, cold water can meet the low temperature type intelligent temperature below 5 DEG and 0 DEG C requirements. The connection between the water cooler and the mold is usually connected with an enhanced hose, because the hose itself has the function of heat insulation, but the length is more than 5m, and it should also consider moderate thermal insulation.
If you just try machine you can not, if it is used in batches, otherwise the oil temperature will increase to a certain extent, such as the temperature of injection molding machine will alarm, high temperature of pressure and velocity is also affected.
