There is a solution worth mentioning in terms of energy saving and cost reduction for injection molding machines, which is to purchase excess screw barrels and replace the screw barrels when the color of the injection molded product is adjusted.
The function of the screw barrel of the injection molding machine is to transport, compact, melt, stir and spray plastic. All these procedures are completed by the rotation of the screw in the barrel.
When the screw rotates, the plastic will generate friction and mutual motion against the inner wall of the barrel, the bottom surface of the screw groove, the propelling surface of the screw edge, and between plastics.
The forward advancement of the plastic is the result of this combination of movements, and the heat generated by the friction is also Being absorbed is used to raise the temperature of the plastic to melt it.
Usually when using plastic raw materials of different colors, the remaining material in the barrel should be cleaned. Generally, new color raw materials are used to clean the barrel, resulting in a waste of raw materials and electric energy.
Before the injection molding machine uses the replacement barrel, when processing products of different colors, the barrel needs to be cleaned with transparent or white raw materials.
About 3-4 packages (50kg/pack) of raw materials need to be used each time; when increasing the use of replacement barrels , when processing raw materials of different colors, there is no need to clean the barrel with transparent or white raw materials, just replace the barrel directly; a total investment of 108,000 yuan was purchased for 2 sets of new screw barrel sets.
Each time raw materials of different colors are replaced, 200kg can be saved According to the calculation of 500,000 cleaning barrels per year and raw material price of 25,000 yuan/t, the cost can be saved by 250,000 yuan per year.
