(1) Within three days of the actual operation of the die casting machine, be sure to pay attention to check whether there is nitrogen leakage, so as to prevent the equipment from being damaged in the nitrogen bottle during transportation. (2)One week after the actual operation, the first inspection will be conducted. From then on, the inspection will be conducted once a week and then every two months. In case of insufficient pressure, nitrogen should be added in time. (3)Ways of examining the nitrogen pressure are as follows: close the operation of motor, stop switch calibration, open the pressure relief valve, at the same time, observe the hydraulic pressure of booster oil and 2 speed hydraulic pressure , when the oil pressure falls to zero, the two groups of accumulator nitrogen pressure value equal to the pressure accumulator nitrogen pressure and fast injection accumulator nitrogen pressure .The nitrogen pressure must conform to the standard value in the user manual.

The purpose of focusing on weight as a reference element is to focus on the concept of compactness.The degree of compactness is different under different conditions, so we need to look at this point reasonably. Generally speaking, if the surface of thin - walled castings is to be done well, the injection velocity must be fast. Thick wall surface to do well, the process of shooting must be strong. Thin - walled surface to do a good job, the injection rate of the conventional machine is basically ok.For thick wall parts that require both surface and compactness, in addition to fast shooting speed, it is also necessary to ensure the inner compactness of the casting. During die-casting, after the explosive power of the two-speed nitrogen cylinder, the pressure supplement of the conventional machine may be insufficient. In fact, speed and force are inversely proportional, like a car, low gear, the force is the largest, high gear force is not strong.Therefore, for thick wall parts with required surface, if there is a force supplement in the forming process, it can be better to assist the force this element, powerful and speed, compactness will be better. Combined with the actual situation of die-casting, the relationship between force and speed, the engineer added the supercharging action to the machine to make the machine have this characteristic.Of course, reasonable excellent mold is the main part of improving the product excellent rate, the machine and skilled operators play an important auxiliary role. The concept of force and speed for castings with different thickness and thin wall is clear, and the good standard of castings can be treated reasonably if the key points of each process are properly applied. The sprue sand hole of thick wall products is usually caused by shrinkage hole caused by too high mold temperature. Under the condition that mold temperature control is not ideal enough, if the follow-up supplementary force is enough, it can make up for the sand hole to some extent.

Matters needing attention in mold production Before mold production, die caster should pay attention to the following requirements: 1.In the cold mold state or in the shift, or the machine is not normal production and other circumstances, you must re-adjust the switch, and the two block and pressurized off. So as not to cross the machine or damage the mold. 2.The handles, slag bags and wastes in the residual castings must be heated and dried on the furnace before adding the crucible to prevent spatter and injury. 3.Before the machine is opened, it must be started by inching, and start the machine under the condition of ensuring no abnormality of the machine. No abnormal conditions include: normal temperature of hydraulic oil, lubricating oil, and open cooling water. 4.It is strictly prohibited to adjust the opening of the machine tool, dismantle or move the safety protection components and devices of the machine tool in the clamping mold state. 5.In the machine tool production process, must avoid the parting surface, in case of channeling aluminum, injury. 6.Power must be turned off when the machine is shut down, and the water inlet valve must be closed when the machine is shut down for a long time. In winter, the water in the cooler must be drained to prevent the cooler from freezing. Before casting production, the mold cavity, core, guide column, guide sleeve, ejector rod, reset rod, mold guide part and sliding part must be thoroughly brushed with oil. If any abnormality is found in the casting production, it should be stopped and checked in time.Pay attention to safe production. In the normal production process, the die caster must execute the correct die casting process requirements: 1.Spray correctly. 2.Brush oil on the relevant sliding parts on the mold. 3.Clean the residual aluminum slag products or any other foreign matter on the parting surface. 4.Control material temperature. 5.Control mold temperature (with mold temperature machine, mold cooling water or spray). 6.Control handle thickness. And according to the product quality, adjust the process in time. In the die casting process, special attention should be paid to the mold cavity, parting surface and exhaust slot of the scum is clean, absolutely no residual aluminum slag or any other foreign matter.Try not to use hard tools such as file when cleaning, in order to avoid damage to the cavity surface, also to prevent mold failure, so please use air pump gun or copper rod tools to work. 1.In case the casting fails to come out or the casting is partially stuck in the cavity of the moving and static model, it is strictly prohibited to use a hard file or a power drill to remove it, so as to avoid damaging the mold and causing production stop-production failure.If there are more than one neutron core on the mold structure (neutron refers to the core moving by external force (oil cylinder connection) in the mold), and the core (pin) has interference with each other, you must be in stric...

Cold mold production plan 1.The mold in the cold mold state, to brush more oil, less spray. When the mold temperature reaches the technical requirements after the normal spray coating. Then the two blocks and pressurized gradually open, and according to the normal process of production. 2.Mold in the case of no preheating to low-pressure production, and the production parameters on the machine must be reduced or closed to zero (remember: do not open fast injection to prevent mold run and stick).Every production of a mold to brush the oil or demoulding paste, to prevent the cold mold adhesion with material phenomenon (aluminum temperature had better reach 680℃ above, so the mold temperature rise faster).Low pressure production of about 30 molds, with the exhaust device and injection in each mold to close the exhaust valve in time, at the same time to observe the normal operation of the active parts, and then debug the production parameters of the machine until the production of qualified products and extraction of finished products.In the die casting production, it is found that the gate and the casting parts have the phenomenon of aluminum sticking pull caused by impact.If there is running material, should be cleaned up in time, otherwise the more tight the pressure, the more difficult to clean up.

The correct preheat production plan of the mold 1.If the die casting mold needs to be preheated before production, the cooling water of the mold shall be temporarily closed, and then the water volume shall be gradually adjusted according to the mold temperature. When preheating the mold, be careful not to make the mold local overheating (dark red phenomenon), in case the mold annealing. 2.When preheating the mold, it is forbidden to use two-block injection or pressurized injection.It must be heated effectively without damaging the mold according to the design requirements of the mold.For those with thermostatic tubing, use a mold temperature controller for heat preservation and heating.If there is no thermostatic tubing, gas can be used to increase the temperature. When heating, it should be done gently, evenly and slowly so that the temperature rise of the core and the core seat can be synchronized with the expansion.When the mold temperature preheats to about 220°, run each moving part to prevent the normal operation from being affected by the phenomenon of tight biting due to thermal expansion.After producing about 10 molds at low pressure, the high pressure production parameters were adjusted and qualified products were extracted.In the early stage of die casting production, it was found that the sprue part and the casting part of the finished product had the phenomenon of aluminum sticking pull caused by impact.If there is running material, should be cleaned up in time, otherwise the more tight the pressure, the more difficult to clean up.

Mold use and maintenance manual After the acceptance of the mold, in order to make the mold to maintain the best performance state and prolong the service life, to ensure the normal production and product quality, to reduce the production cost as far as possible, when the mold is used, please follow the following items for necessary maintenance and maintenance. Mold production specification Inspection and installation requirements before mold production Before starting work, you must wear protective equipment, such as hard hat, work clothes and labor protection shoes. Wearing short-sleeved shirts, shorts and slippers is strictly prohibited. Before the installation of the mold, first of all to confirm the die casting machine specifications and mold design requirements to match. The die caster must have a thorough knowledge of the mold structure, including: Check whether the mould has core pulling (dynamic mould core pulling, static mould core pulling, oblique rod core pulling and hydraulic core pulling).         Whether it is necessary to install the pre-reset pull rod or strong spring of the ejector rod. Check whether the combination size of sprue sleeve, flange and melting cup is consistent. Confirm if it is the center sprue. Check the top bar position for no interference and ejection balance. Replace the molten cup punch according to the mold condition and adjust the injection lifting mechanism when necessary. Check the outer fastening bolt of the mold again, and confirm that there is no loosening phenomenon, the mold can be installed on the machine to ensure reliable installation of the mold. Check the die casting machine and mold moving template and static template mounting surface: no foreign body, no high point. Mould in die casting machine, to the right after tighten-up platen and installation is firm, and then to idle mode of the mould, check whether mold opening and closing smoothly and observe its each part movement is flexible, whether there are abnormal phenomenon, the ejection stroke, open schedule is in place, it fits the profile at the closing time, closely linking piece screws are tight, waterway, the oil was clear. Check the running of sliding parts on the mold. Such as guide post, guide sleeve, thimble, push rod ejection and other moving parts (bit) should be observed at any time, regular inspection, timely scrub and add lubricating grease, in order to ensure the normal and flexible operation of these sliding parts, to prevent tight biting dead. Adjust die closing, ejection pressure and distance, and install various auxiliary parts (such as water pipe, oil pipe, air extraction device). During the debugging process, check whether there is any damage, leakage or blockage in the connection of water pipe and oil pipe. When the pressure plate bolts of the mold installation are firm and do not become loose, the mold will continue to open and close the die casting machine for three or four times for debugging. ...

1. It will make the alloy structure in the die casting discontinuous; 2. Reduce the air tightness of the workpiece; 3. Die castings are easily corroded; 4. Reduce the strength and plasticity of die castings; 5. Die castings are prone to cracks; 6. The difficulty of later processing increases; 7. The scrap rate of die castings has increased; 8. Harmful impurities cannot pass through environmental protection.

1. Control the quality of raw materials; 2. The use of secondary materials is strictly in accordance with a reasonable ratio; 3. Use high-quality refining agents for metal smelting; 4. Use ceramic filter; 5. Vacuum melting and conveying; 6. Use ceramic spoons, crucibles, protective tubes, and discard iron tools; 7. Regularly clean up molds, tools, and working surfaces; 8. Use high-quality release agent and other auxiliary materials; 9.Keep the working environment clean.