During the operation of plastic injection molding machine, it is need to attention 4 points for safety.
- Do not reach into the mold workspace.
- Don’t touch the heating of screw barrel
- While injection, please put on the protective cover
- Check the cable of the high pressure hose
Plastic injection molding machine is a manufacturing machine designed to turn plastic polymers and resins into plastic parts and products. Plastic injection molding machines combine material feeding, melting, injection, and ejection in one condensed space.
China is one of the most important country in plastic injection molding machine, the annual total production ranks first in the world recent years. Ningbo, Hangzhou and Guangzhou these three cities produce 70-80%of the injection molding machine in China.
Safety of plastic injection molding machine is one of important parts for it: injection molding for safety equipment.
Plastic injection molding machine safety: Operation safety points
Do not reach into the mold workspace.
Do not reach your hands around, below, or above the mold workspace. If the operator standing next to the machine is able to cross the machine and enter the mold area, install a fixed or interlocked top protection device. Enter the mold cavity through the safety door and do not remove the fixed protective device during normal operation.
Don’t touch the heating of screw barrel
The temperature of heating screw barrel is very high, it is dangerous to touch it, so please be careful.
While injection, please put on the protective cover
Check the cable of the high pressure hose
Safety of plastic injection molding machine: General safety rules
I wanted to bring to your attention some important injection moulding health and safety guidelines and maintenance procedures related to our plastic injection molding machines.
It is crucial that only individuals with sufficient experience and knowledge of injection molding machines, as well as familiarity with industry standards and safety measures, should be responsible for service, maintenance, and repairs.
If needed, please seek assistance from the after-sales service department.
Safety production instructions for injection molding machines:
When the plastic injection molding machine is semi-automatic and in normal production, it can only open the front safety door, remove the product and the material rod and close the front safety door.
In addition to the actions described above, any actions must be carried out manually after shutting down the oil pump.
For those involving electricity, it is necessary to turn off the power supply, such as the work may come into contact with the nozzle and melt cartridge, and before cleaning the mould or adjusting any mechanical parts, it is necessary to pay attention to turning off the power to ensure safety.
When the automatic alarm occurs in the equipment, the operator needs to withdraw from the scope of the equipment and switch to the “manual” state.
In case of an emergency such as a personal accident or abnormal noise of the equipment mould, you need to press the stop button immediately and seek help from others.
In the process of running the machine, we should pay special attention to avoid extending any part of the body into the closed safety door. And the safety door should be opened before going deep into the mould.
If the upper body needs to be put into the middle of the two templates during daily inspection or repair of the equipment, the oil pump needs to be turned off; In any case, the entire body needs to be cut off from power to enter the two templates.
Install a uniform mould protector to avoid mould compression: The mould protector, also known as the mould monitor and electronic eye, is mainly a mould protection system that monitors, controls and detects the operation of various injection molding machines in real time. It can effectively protect expensive moulds, can effectively detect whether the product is qualified, and check whether there is residue before clamping to prevent mould clamping.
Install a uniform mould protector: injection moulding health and safety
The mould protector, also known as the mould monitor and electronic eye, is mainly a mould protection system that monitors, controls and detects the operation of various injection molding machines in real time.
It can effectively protect expensive moulds, can effectively detect whether the product is qualified, and check whether there is residue before clamping to prevent mould clamping.
The mould protector can detect the mould from the following aspects, and once one of the following situations is detected, it will immediately alarm and stop the machine to prevent the mould.
1. Detect the mould cavity, mould core, and product residue before closing the mould.
2. Detect the position of the slider, the ejection return of the thimble, and whether the insert is in place.
3. Check whether the plug-in program is inserted correctly.
4. Detect whether the ejection is less broken.
5. Detect whether the product has a lack of material or burr.
6. Detect whether the product is completely demoulded.
7. For products with high precision requirements, test whether the product size is qualified.
8. Detect whether the multi-cavity product is missing.
9. Detect whether the color mixing of multi-color products is correct.
10. Reduce the redundant thimble action to prevent the continuous appearance of defective products.
11. Reduce the use of release agent, suitable for products with difficult mould release. 12. It is used for automatic production line or assembly line to complete the product selection or error correction function.
12. The automatic positioning function and the lighting compensation filter function can be used to eliminate errors and prevent false detection.
Note:
Please note that injection molding for safety equipment, the safety injection molding devices installed on the machines are essential for both
personal safety and the quality of our products.
As such, it is strictly prohibited to remove, bypass, or tamper with these safety
devices without technical support.
In case the safety device malfunctions or shows any error, it is mandatory to shut
down the machine immediately.
To do so, press either of the emergency stop buttons SE1 and SE2 at the front and rear
and cut off the power supply of motor and heating elements.
Additionally, operators must strictly adhere to the operable area designated for
machine operation. Operating outside this area may result in accidents, for which the
company will not be held responsible.
Please refer to the schematic diagram of the operable area for better understanding.
Safety injection molding: injection molding for safety equipment
Safety is critical in manufacturing operations. And the injection molding process presents its own set of hazards and safety concerns. Safety injection molding is one of most important parts for plastic injeciton molding machine.
Maintenance and Repair
Please perform regular maintenance on the machine to maintain good performance and condition, avoid and reduce failures of precision plastic injection molding machinery and hydraulic components, improve product quality, reduce wear and tear, and extend service life.
Notice:
Please be aware that all maintenance and repair work can only be carried out when the main switch is turned off. It is the employer’s responsibility to inform operators about the machine’sconstruction, operation, and function of the safety devices, as well as the hazardous areas involved. To ensure health and safety, non-qualified personnel are strictly forbidden from accessing the machine during operation. Any action that may damage the safety devices should be immediately halted. Employers must guarantee that operators are adequately qualified. Unauthorized removal or deactivation of the machine safety device is not allowed. Similarly, any unauthorized modification or replacement of the safety devices is strictly prohibited.
Maintenance
Operators should pay attention to the operation of the machine. In case of emergency, you should immediately press the emergency stop button on the computer panel and then turn off the main power supply. The oil pump motor must not be restarted until the fault has been rectified.
If the motor, oil pump, or bearing fails, abnormal sounds will occur.
The motor may emit odor due to overload, blocked ventilation, burned electric heating coil, plastic in the barrel, etc.
Check the lubrication system and oil pipes.
Security check: injection molding for safety equipment
Before starting the machine, open the safety door and check whether the safety device is working properly;
Check whether the emergency stop button is valid;
Check whether there are any unsafe factors around and whether there are any tools or stains left on the machine;
Establish a regular inspection system for safety devices.
Electrical inspection: injection molding for safety equipment
Check the power supply and wiring before starting the machine;
After starting up, check whether the motor is running normally;
Check electrical components;
The motor should be inspected every 5,000 hours or at least once a year;
Check the fastening bolts at the connection.
Hydraulic system inspection: injection molding for safety equipment
Check the oil level gauge to see if the hydraulic oil is above the center line;
Check whether the oil in the lubricating oil tank is above the center line;
Observe whether there is any leakage in the oil pipe;
Check the sealing condition of the cooling water pipe and clean it if any.
Mechanical system inspection
Check products for defects and identify causes;
Adjust the steel strap on the tie rod;
Adjust the sliding plate supporting the moving formwork.
Injection molding machine is an important machine for the production of plastic molds, which provides great convenience for the use of plastics in our lives. In the process of using an injection molding machine, noise is often present. Where does all this noise come from?
Generally speaking, the injection molding machine will make some noise during normal use. These noises can be used to tell if the machine is operating very normally, because some noises are present under normal conditions, while some noises are caused by faults. When the oil pump of the injection molding machine produces abnormal noise and vibration, it may usually come from many aspects, such as the installation of the oil pump motor is not centered, the coupling of the oil pump is loose, the oil level is too low, etc., which will cause the noise of the oil pump.
The following table shows the measure values of the A-weighted emission sound pressure level at operating station.
The normal vibration of the machine is less than 0.5m/s².
How to reduce noise while molding plastic:
Machine Installion: Installing a shock-absorbing pad or isolation bracket underneath the molding machine can help reduce the spread of noise through the floor.
Sound-absorbing materials: The use of sound-absorbing materials in the injection molding room, such as sound-absorbing tiles or sound-absorbing panels on walls and ceilings, can help reduce overall noise levels.
Injection speed: Slowing down the injection speed of the plastic can reduce the noise generated during the injection molding process.
Machine maintenance: Regular maintenance of the injection molding machine, including keeping it well lubricated and adjusting the nozzles, can help reduce noise from friction and vibration.
Proper machine ventilation: Proper ventilation of the build chamber helps to reduce the noise level generated by the plastic cooling process.
Acoustic enclosures: Building acoustic enclosures around the injection molding machine can significantly reduce noise levels.
Cooling Noise Reduction: Consider using a cooler with noise reduction.
When encountering noise from the injection molding machine, it is necessary to check and find out the source of the noise before carrying out targeted maintenance work.
Safety device
Safety is paramount in production operations, and the injection molding process comes with its own set of hazards and safety concerns. High temperatures, high-pressure hydraulic circuits, and harmful fumes all pose risks to operators, and the popularity of injection molding provides many opportunities for accidents. There are ways to prevent safety incidents, but they all involve education that focuses on how molding works and where the hazards lie in the process.
This article will help educate readers by detailing various safety precautions for injection molding, including mould safety, nozzle, barrel cover, fixed door and safety signs.
mould zone safety door -non-operating side
The interlocking guard on the non-operating side is monitored by limit switches.
Once the safety door is opened, the hydraulic oil pump stops.
The oil pump can only be started when the non-operating side safety door is closed.
- When the machine is running, especially when the mold is closed, the safety door shall be closed to prevent the human body from entering the moving area of the mold and causing damage.
- When the rear safety door is opened, the movable space is provided for the fixing and disassembly of the mold. In addition also convenient machine maintenance and maintenance.
Nozzle area guard-operating side
This nozzle guard prevents access to any pinch points during nozzle advance, preventing personnel from touching the hot nozzle or being hit by the ejected material.
The limit switch has a monitoring function. The limit switch is activate when the nozzle guard closed, disengaged when the nozzle guard is opened, and cuts off dangerous actions such as “injection”, “nozzle forward”, “charge”, etc.
Error Messages:
If trying to start the cycle with the nozzle guard door open, error message: ” Nozzle guard door not closed” .
Barrel cover
The plastic injection molding barrel is a cylindrical component that is integral to the injection molding machine. It is located between the plasticizing screw and the mold cavity. It serves as a chamber for melting and processing plastic materials.
The barrel cover is fixed over the heating ring on the plasticizing barrel, which
prevents touching the Hot part of the barrel.
Fixed door
All fixed doors are screwed and cannot be removed.
Description of safety signs
Warning of splashing hazard
Position: Adjacent to the nozzle area.
Warning of crushing hazard
Position: On the moving guard doors of the mould area.
Warning of hot surface
Position: On the cover of the plasticizing barrel, the nozzle area.
Wear protective gloves
Position: On the cover of the plasticizing barrel.
Do not walk or stand here.
Position: Various machine areas.
Warning of electrical hazard
Position: On the doors of electric cabinets.
Warning of arc flash hazard
Position: Adjacent to the handle of the main disconnecting device.
Reading instruction manual
Position: On the operation position
Wear a face shield
Position: On nozzle guard.
Sign of lifting point
Position: Adjacent to the lift points
Haichen has rich experience of injection moulding health and safety in plastic injection molding machine production. Safety injection molding is very important parts for plastic injection molding machine. We are committed to providing fully automatic, excellent and precise plastic making machines, which can provide you with efficient and large-volume product output needs.
