Injection Molding Machine Safety Rules
1.1 General safety rules
The maintenance, repair and maintenance of the machine must be performed by a qualified specialist with extensive experience in the field of injection molding machines. They should be familiar with industrial life and safety standards and should be familiar with the construction and function of the necessary machine safety equipment.
note:
Installed on the machine safety device, the purpose is to ensure the safety of the operator's life and ensure that the product from damage.
The machine must ensure that all safety equipment is operating under normal operating conditions.
Do not disassemble any safety device.
Safety facilities also include programs in the software and do not allow any changes to the programs.
If any accidents or mistakes in the safety facilities, immediately turn off the machine;
Emergency stop button Main power switch off Cooling water supply after about 20 minutes must be notified immediately
The fault must be eliminated before restarting the machine
1.1.1 Machine safety signs
Please pay attention to the safety signs in production, use Chinese and English, be sure to achieve the "safety first" principle.
1.1.2 Maintenance matters needing attention
note!
All maintenance work must be carried out at the main power switch of the injection molding machine, set at "0", if necessary, lock with a padlock.
It is the employer's responsibility to let the operator know the structure and function of the safety equipment and take personal health and safety seriously.
note!
Any work that could damage the safety of the machine should be stopped.
The employer must ensure that the operator is some experienced and qualified operator.
In any case, safety equipment should not be disassembled or rendered ineffective. If you really need to remove the safety device in order to repair the machine, you must ensure safety. After the repair work is completed, replace the safety facilities as they are and check the result.
Any change to your security facility is not allowed without your permission!
1.1.3 Elimination of toxic smoke
Some plastics emit toxic fumes when overheated, mainly PTEE, POM and PVC.
If these toxic fumes can not be removed by emergency mechanics, it is recommended that an extractor fan be installed to remove harmful fumes and that the extractor fan switch be interlocked with the injection machine power switch.
note!
If the fume extraction unit is mounted directly on the machine, we recommend mounting on a fixed platen.
1.1.4 Prevention of plastic decomposition
When heated for a long time, some plastics will decompose and explode. This plastic is mainly POM and PVC.
Such plastic processing, pay attention to injection pressure should be raised from the nozzle nozzle, the decomposition of gas can escape from the nozzle.
Accident prevention through the following measures:
In strict accordance with the characteristics of plastic materials set the process and parameters, especially in the barrel heating temperature and residence time. When processing thermosensitive plastics, the retention time of the plastic in the cartridge should be shortened. When the production is interrupted or the material is denatured, it is washed with polyethylene (PE) (using a barrel of thermosensitive plastic) and the heating is stopped.
1.1.5 Prevent over-molding caused by accident
General pre-plastic amount of more than 15% of the weight of the product is more appropriate, pre-plastic over the assembly after the injection there is still too much high-temperature high-pressure melt remain in the barrel and hot runner; plastic back pressure is too high, when the pre After the plastic is finished, there is still a high residual pressure of the melt in the barrel. When the cavity is manually removed or the mold is repaired, the energy may suddenly be released and the body is burned. Therefore, the injection base must be retracted beforehand Nozzle left die, open the mold and stop the pump motor.
1.2 safety equipment
1.2.1 General equipment
Security facilities include guards and insurance agencies
The protective door prevents anyone or anything from entering the danger zone and protects personnel from being exposed to molten plastic splashing out. When the protective door is opened, the insurance agency will interrupt any dangerous mechanical movement. Mold mobile protection door and hydraulic ejector dimensions, are designed to have a large enough security margin, for larger molds, the size of the protective door at this time a corresponding increase.
