When choosing the size of the pressure chamber's inner diameter, consideration should be given to both the required specific pressure and the degree to which the pressure chamber is already occupied. To prevent there from being a space between the pressure chamber and the sprue bushing, the deviation of the inner diameter of the sprue bushing ought to be a few times larger than the deviation of the inner diameter of the pressure chamber. The punch will become jammed or severely worn if the inner diameter is not the same as the axis, and the wall thickness of the sprue sleeve should not be too thin. In most cases, the length of the sprue sleeve must be shorter than the delivery stroke of the injection punch in order to allow sufficient room for the paint to flow away from the pressure chamber.
After undergoing heat treatment, the inner hole of the pressure chamber as well as the sprue sleeve should be finely ground. Following this, the axial direction should be ground, and the surface roughness should be less than or equal to 0. 2 micrometers (Ra0. 2). The diverter and the concave cavity that forms the paint both have a concave depth that is equal to the depth of the runner. Additionally, the diverter's diameter matches the inner diameter of the sprue sleeve, and there is a 5 degree slope along the direction of demoulding. Because the volume of the effective length of the pressure chamber is shortened when using the coating lead-in sprue, it is possible to increase the fullness of the pressure chamber. This is made possible due to the fact that the fullness of the pressure chamber can be increased.
In general, the entrance of the runner on the cold horizontal mold should be located above two thirds of the inner diameter of the upper part of the pressure chamber. This is done so that the liquid metal in the pressure chamber does not enter the runner too soon under the influence of gravity and begin to solidify ahead of schedule. From the sprue to the ingate, the runner's cross-sectional area should gradually decrease until it reaches its minimum. When the molten metal flows through the opening, there will be a negative pressure, and the gas on the parting surface will be easy to suction, which will result in an increased rate of flow of the molten metal. This will allow the cross-section to be expanded. The eddy current is surrounded by air, and the outlet's cross die casting mould section is typically 10–30% smaller than the one at the inlet.
The length and depth of China die casting mold runners should meet certain requirements. Maintaining a specific length serves two purposes: it helps maintain a consistent flow and it provides direction. If the depth is not sufficient, the temperature of the molten metal will drop quickly. If the depth is too deep, the condensation will be too slow, which will affect the productivity and increase the amount of recycled materials. If the depth is not deep enough, the temperature of the molten metal will drop quickly. For the purpose of maximizing the rate at which molten metal is poured into the mold, the cross-sectional area of the runner should be larger than that of the ingate. It is important that the main runner have a larger cross-sectional area than each of the branch runners individually. To prevent cracks from appearing prematurely, the two sides of the bottom of the runner should be rounded, and the slope of the slope should be approximately five degrees. The surface of the runner part has a roughness of Ra0. 4 micrometers.
After the molten metal has been poured into the mold, the parting surface should not be closed, and the overflow groove and exhaust groove should not have a direct impact on the core. When the molten metal first enters the mold, its flow direction is as far as possible along the cast ribs and heat sinks. It then fills the mold in a manner that progresses from the thick wall to the thin wall, etc. When deciding where to place the ingate, you should pick a spot that allows the flow of the molten metal to be as rapid as possible. When utilizing a multi-strand ingate, it is necessary to take precautions to prevent several strands of molten metal from converging and colliding with one another after the molding process. If this occurs, defects such as eddy current entrainment and oxidation inclusions will be produced. The ingate of the thin-walled part should be appropriately smaller to ensure the necessary filling speed, and the ingate should be set for easy removal without causing defects in the casting body. These two requirements should be met simultaneously.
Die-casting oil temperature machine: six essential roles it plays in the die-casting industry
Die-casting oil temperature machine: six essential roles it plays in the die-casting industry.
The process of die casting utilizes a wide variety of materials, including zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys, as well as their respective alloys. During the die-casting process, the deformation of this material is governed by the application of pressure as well as temperature; the final products are then die-cast into industrial forms. Heating and cooling the client is accomplished through the utilization of the die-casting oil temperature machine in conjunction with the temperature control system of the die-casting machine. The die-casting oil temperature machine requires a specific temperature setting for each type of raw material; if the temperature is either too high or too low, the machine will not function properly. There is a proverb that refers to the reliability of the oil temperature machine.
So, what exactly is the function of the die-casting oil temperature machine within the die-casting sector of the manufacturing industry?1. Preheat the mold in advance to reduce the likelihood of the mold breaking as a result of cracking brought on by an abnormal temperature. The PLC intelligent die-casting oil temperature machine can be started remotely, and the fact that it can be preheated in advance saves time during the machine's initialization process. 2. Reduce the amount of energy that is consumed, increase the speed at which production progresses, and improve efficiency. 3. Once the die-casting oil temperature machine has reached the temperature that has been programmed into it, it will maintain the temperature at that temperature, and the temperature will not change. This will ensure that the product quality will not fluctuate. precision die casting supplier 4. The precision with which the temperature can be controlled is very high. At the moment, the precision of the Ou Neng oil temperature machine can be controlled to within 0. 05 degrees Celsius, which means that the amount of release agent that is utilized can be decreased. 5. Accurately controlling the amount of time it takes for the product to solidify, effective cooling, and a solution to the shrinkage cavity.
The core of an aluminum alloy die-casting mold typically undergoes a heat treatment that results in a hardness of HRC48-52°; however, this value can range anywhere from lower to higher depending on the size and complexity of the mold. The heat treatment results in a hardness of HRC45-48 degrees for an ordinary aluminum alloy die-casting mold. When the large-scale aluminum alloy die-casting mold requires a certain level of casting services toughness, the heat treatment hardness should be between HRC42 and 45 degrees. When the die-casting mold for aluminum alloy needs to have a long life, the heat treatment hardness should be between HRC50 and 52 degrees. In order to achieve micro-spraying, it is important to maintain a level of mold temperature control that is reasonable throughout the die-casting cycle.