How to solve the problem of core shooting machine
When there is a problem with the core shooting machine, the manufacturers will be very anxious and want to fix it as soon as possible and continue to use it, but do you know the cause and solution of the core shooting machine failure, how to solve the problem of core shooting machine? Here are some solutions from Delin Machinery.
What are the problems of the core shooting machine and how to solve them?
1. The problem that the top core sinks when the top core is shot: Because the top core cylinder is a cylinder, the cavity of the mold is filled with complex mold sand and compressed air during the shot, which causes the top core cylinder to top during the shot the core force is less than the sum of the core shot force and the total amount of the mold, so the top core cylinder sinks;
the solution to this contradiction is to reduce the shot force without affecting the sand shot, from the original 7kg / cm = Reduced to 3-3.5kg / cm, which is the 1.2-inch tube between the blasting cavity and the air inlet, adding a pressure regulating valve to reduce the pressure of the blasting cavity, this decompression successfully solved the top core cylinder and the problem of the sinking has not changed the original structure. At the same time, it solves the problems of cavity core shooting pressure and serious pollution.
2. The problem of large smoke and dust during the exhaust of the exhaust valve: Because the machine needs to work, the compressed air in the sand shooting cavity is discharged in a short time, so it is not easy to change the structure. Therefore, a cyclone dust collector is used to communicate with the exhaust valve to collect smoke and dust. The result is very good and the sound is also silenced.
3. The problem of high electromagnetic valve failure: After observation, on the one hand, the quality of the valve is not good, on the other hand, it is the problem of the installation location. Some are far from the machine tool soot, and some are near the heat source of the machine tool. The electromagnetic valve is easy to die in the place with large smoke and dust, but it is easy to be deformed and clamped by the heat near the heat source. The solution is to replace the original solenoid valve with the solenoid valve and place the solenoid valve in a unified place away from the heat source and smoke. Covered with a dust cover to solve the problem.
4. Unstable and weak core-lifting action, the problem of sand core spalling when the sand core is demoulded: After analysis of this problem, it is believed that the original gas-liquid transmission device is not suitable for core-lifting action, and the gas-liquid transmission force is not enough. The improvement is It cannot be avoided, so the hydraulic transmission device with pressure control and speed adjustment is used to ensure the smooth movement and demoulding force when the core is lifted, and to ensure that the sand core does not split.
5. Sandblasting at the shot blasting port: It is only a small problem, but it seriously affects the demoulding when the core is taken. After the shot blasting is completed, it is cleaned up when it is not solidified. After the trajectory of the machine tool, the sand sweeping device is installed on the way of sand fixation after the sand shooting is completed, and this problem can be solved.
6. The solution to the hopper height is not easy to add sand: modify the hopper so that the hopper can be matched with the pneumatic sand feeding device, and install the pneumatic sand feeding device.
7. If the power indicator and pc indicator of the core shooting machine are not lit, it may be that the power supply is not connected or the fuse is damaged. At this time, the power supply should be checked and the fuse of the same specification should be replaced in time.
8. If the mold clamping of the core shooting machine is abnormal, it may be that the position of the proximity switch of the forward and backward movement of the barrel and the pressure action of the barrel is improper.
9. If the forward shooting head of the core shooting machine does not respond, it may be that the air pressure power supply is not turned on, so there is no air pressure, or it may be the improper approaching position of the barrel. Adjust the barrel to release the approaching state to solve.
10. If the compression of the shooting head of the core shooting machine is abnormal, it means that the position of the barrel advance proximity switch is improper, then adjust the barrel advance proximity switch.
Maintenance and failure recovery
Please routinely add lubricating oil for the twin strainer and keep the machine and switch cabinet clean.
| No. | Failures | Recovering methods |
| 1 | Die open-closing doesn’t function | Check whether the air pressure reaches standard; whether the inductive switch of die-turning responses and whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 2 | Rocker doesn’t work | Check whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 3 | Shooting head clamping doesn’t work | Check whether the rocker inductor is working and whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 4 | Sand shooting doesn’t work | Check whether the voltage of the electromagnetic valve is standard or whether the voltage of the twin strainer is lower than that of the airbox. |
| 5 | Sand-falling doesn’t work | Check whether the voltage of the electromagnetic valve is standard |
| 6 | The vibrating electric motor doesn’t work | Check whether the contactor is switched on and whether the electric motor is locked or burnt out. |
| 7 | Left and right die failed to heat up(DL-400 double head series) | Check whether the contactor is switched on; whether the three-phase voltage is standard; whether the temperature controller is working; whether the thermoelectric couple is normal and whether the heating pipe is burnt out. |
| 8 | Core-pulling doesn’t work | Whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 9 | Static die-pushing doesn’t work | Check whether the turning-inductive switch responses; whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 10 | Moving die-pushing doesn’t work | Whether the voltage of the electromagnetic valve is standard or whether the electromagnetic valve is locked. |
| 11 | Fail to work automatically | Check start and stop buttons, as well as the manual, single-action and automatic revolving switches. |
| No. | Failure | Recovering methods |
| 1 | Fail to heat up | Check if the temperature controller is working, whether relay and connector are switched on and whether the electrical heat tube is burnt out. |
| 2 | Fail to open and close the die | Check if the air pressure is standard; whether the power supply used for the electromagnetic valve of die is DC24V or whether the power supply is damaged; whether the throttle valve is closed. |
| 3 | the left and right sandboxes fail to enter(DL-400 double head series) | Check if the pressure indicator is standard, whether the power used for the electromagnetic valve of sandboxes is DC24V, whether the electromagnetic is damaged and whether the throttle valve is closed or damaged. |
| 4 | fail to shoot sand | Check whether the power used for the electromagnetic valve of sand shooting is DC24V and whether the electromagnetic valve is damaged. |
| 5 | When shooting, the sand is plunged into the sand hopper | Check whether the rubber at the port of sand hopper is loose or damaged. |
| 6 | The sand core is not solid | Check whether the air pressure is normal or whether sand shooting time is standard. |
Delin Machinery is a well-known Chinese foundry machinery manufacturer, which can provide quotation and export of core shooting machines to various countries. If you want to know more related information, you can pay more attention to our website dynamics!
Welcome to Call / WhatsApp or send us Email about any question on the machine, please contact us >>>Tel / WhatsApp / WeChat: +86 13960339790, Email: [email protected]
