Hey there! I’m a supplier of Two Shot Vertical Injection Moulding Machines, and today I’m gonna share with you how to calibrate these awesome machines. Two Shot Vertical Injection Moulding Machine
Why Calibration Matters
First off, let’s talk about why calibration is so important. A well – calibrated Two Shot Vertical Injection Moulding Machine ensures consistent product quality. If the machine isn’t calibrated correctly, you might end up with parts that have inconsistent dimensions, poor surface finish, or even structural defects. This can lead to a lot of wasted materials, time, and money. So, getting the calibration right is a must if you want to run an efficient and profitable production line.
Pre – Calibration Checks
Before you start the actual calibration process, there are a few things you need to do. First, make sure the machine is clean. Any dirt, debris, or leftover plastic can affect the calibration and the performance of the machine. Check all the moving parts, like the injection unit, the clamping unit, and the ejector system. Look for any signs of wear and tear, such as loose belts, worn – out bearings, or damaged seals. If you find any issues, fix them before proceeding with the calibration.
Also, check the electrical connections. Loose or faulty connections can cause erratic behavior in the machine, which will mess up the calibration. Make sure all the wires are properly connected and there are no signs of fraying or damage.
Calibrating the Injection Unit
The injection unit is one of the most important parts of the Two Shot Vertical Injection Moulding Machine. It’s responsible for melting and injecting the plastic into the mold. To calibrate the injection unit, start by checking the screw speed. The screw speed affects how fast the plastic is melted and injected. You can use a tachometer to measure the screw speed. Compare the measured speed with the recommended speed in the machine’s manual. If there’s a difference, adjust the speed controller accordingly.
Next, check the injection pressure. The injection pressure determines how well the plastic fills the mold. You can use a pressure gauge to measure the injection pressure. Again, compare the measured pressure with the recommended pressure. If it’s too high or too low, you can adjust the pressure relief valve or the hydraulic pump settings.
Another important aspect of the injection unit calibration is the shot size. The shot size is the amount of plastic that’s injected into the mold in each cycle. To calibrate the shot size, you can use a weighing scale. Weigh the plastic parts produced in a few cycles and calculate the average shot size. If the average shot size is different from the desired shot size, you can adjust the screw stroke or the injection time.
Calibrating the Clamping Unit
The clamping unit is responsible for holding the mold closed during the injection process. A properly calibrated clamping unit ensures that the mold doesn’t open prematurely, which can lead to flash (excess plastic) on the parts. To calibrate the clamping unit, start by checking the clamping force. You can use a force gauge to measure the clamping force. Compare the measured force with the recommended force in the machine’s manual. If the clamping force is too low, the mold might not be held tightly enough, and if it’s too high, it can damage the mold. Adjust the hydraulic pressure or the mechanical settings to get the right clamping force.
Also, check the parallelism of the platens. The platens are the flat surfaces that hold the mold. If the platens aren’t parallel, the mold might not close evenly, which can cause problems with the part quality. You can use a dial indicator to check the parallelism. If there’s a deviation, you can adjust the platen leveling screws.
Calibrating the Ejector System
The ejector system is used to push the finished parts out of the mold. To calibrate the ejector system, start by checking the ejector stroke. The ejector stroke determines how far the ejector pins move to push the parts out of the mold. You can use a ruler or a caliper to measure the ejector stroke. Compare the measured stroke with the recommended stroke in the machine’s manual. If it’s different, you can adjust the ejector stroke limit switch or the hydraulic cylinder settings.
Also, check the ejector force. The ejector force should be strong enough to push the parts out of the mold but not so strong that it damages the parts. You can use a force gauge to measure the ejector force. Adjust the hydraulic pressure or the mechanical settings to get the right ejector force.
Temperature Calibration
Temperature control is crucial in injection molding. The plastic needs to be at the right temperature to flow properly into the mold. To calibrate the temperature, start by checking the temperature sensors. You can use a thermocouple or a temperature probe to measure the actual temperature at different points in the machine, such as the barrel, the nozzle, and the mold. Compare the measured temperatures with the set temperatures on the control panel. If there’s a difference, you can adjust the temperature controller.
Post – Calibration Testing
After you’ve completed the calibration process, it’s important to do some testing. Run a few test cycles and inspect the parts produced. Check for any signs of defects, such as warping, sink marks, or flash. Measure the dimensions of the parts to make sure they meet the specifications. If you find any issues, go back and re – calibrate the machine.
Conclusion
Tiebarless Injection Moulding Machine Calibrating a Two Shot Vertical Injection Moulding Machine is a crucial process that requires attention to detail. By following the steps I’ve outlined above, you can ensure that your machine is running at its best and producing high – quality parts. If you have any questions about calibration or if you’re interested in purchasing one of our Two Shot Vertical Injection Moulding Machines, feel free to reach out. We’re here to help you get the most out of your investment.
References
- Injection Molding Handbook by Dominik Bogdanski
- Plastics Processing Technology by George Menges
Guangdong Baizan Intelligent Equipment Co., Ltd.
We are one of the most professional two shot vertical injection moulding machine manufacturers and suppliers in China. We warmly welcome you to buy customized two shot vertical injection moulding machine at competitive price from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Address: No.8, Jianye Road, Dahuai Town, Enping City, Jiangmen City, Guangdong
E-mail: wjx@baizanjx.com
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