Dongguan Haida Instrument Co., Ltd. specializes in the production of carton compression machines, carton pressure testers, and ring pressure testing machines.
The pressure test is to place the packaging or packaging container on the pressure tester, apply the pressure evenly at its top (or bottom) at a certain speed, and assess the ability of the packaging or packaging container to withstand external pressure and the ability of the packaging to protect the contents.
The main equipment for pressure testing is presses, press plates and load recorders. Presses can be motor-driven, mechanically driven and hydraulically driven. When pressurizing, a pressure plate or two pressure plates shall be capable of moving at a uniform speed of (10 ± 3) mm/min , gradually exerting pressure; the pressure plate shall be flat and the lowest point and highest point of the plate surface when the pressure plate is placed horizontally The difference between levels does not exceed 1mm . The size of the platen should exceed the total area of ​​the opposite side of the package that it is in contact with. The platen must also be rigid and the relative error of the load recorder should not exceed 2% of the applied load. The relationship between pressure and displacement can be obtained through inductive displacement sensors, pull pressure sensors, carrier amplifiers and function recorders.
Because the pressure that the packaging or packaging container can withstand is closely related to the temperature and humidity, the temperature and humidity should be adjusted before the pressure test.
Pressure tests can be performed separately on packages or packaging containers. There are three test methods: opposite, edge, and diagonal. All or part of the test is performed according to the purpose.
When conducting stress tests, pay attention to:
• The test piece is placed in the middle of the compression plate and the load is balanced;
• In order to make the specimen and the pressure plate in good contact, to apply an initial load of 20kg , and this point as a strain base point to adjust the automatic recording device;
• When the load is increased to the predetermined load at the specified speed, check the packaging container or contents for compression and damage.
The test conditions and test methods of the pressure test can be carried out according to the provisions of the national standard “Part 4 : Basic tests for packaging and transport packages†—Compressive and stacking test methods using pressure testers (GB 4857.4-2008) .
The current international standards for “Compression Test and Packing Test Using Compression Testers †(IS0 12048:2001) for “Fully-encapsulated packaging for fully packaged packaging†are currently referred to or implemented.
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