Performance detection device of heat-resisting PET (Polyethylene Terephthalate) bottle

Abstract

The invention discloses a performance detection device of a heat-resisting PET (Polyethylene Terephthalate) bottle. The performance detection device comprises a mounting frame in a stereoscopic frame shape, a hoisting device which is arranged on the mounting frame, a hot filling pipe which is used for inputting constant-temperature hot water, a filling throttling device and a filling valve which are mounted on the hot filling pipe, a vacuumizing device, an air exhausting pipe, and an air exhausting throttling device and an air exhausting valve which are mounted on the air exhausting pipe, wherein a water outlet of the hot filling pipe faces downward in a vertical direction; the hoisting device is located below the hot filling pipe and enables a bottleneck of the heat-resisting PET bottle mounted on the hoisting device to be aligned to the water outlet of the hot filling pipe; the air exhausting pipe and the vacuumizing device are respectively connected with a body of the hot filling pipe. According to the performance detection device disclosed by the invention, the vacuum-resisting degree and the heat resistance of the heat-resisting PET bottle can be directly measured; a read vacuum pressure value can accurately reflect the vacuum-resisting capability of the bottle and detection data is accurate and reliable; the vacuumizing device is used for vacuumizing so as to ensure the consistency of detection results; the repeated test on a beverage filling line is reduced; the production and development cost is saved; the development period is effectively shortened.

Description

technical field [0001] The invention relates to a heat-resistant PET bottle performance detection device, which can accurately determine the vacuum-resistant performance and heat-resistant performance of the heat-resistant PET bottle. Background technique [0002] At present, in the existing national light industry standard, the test method for the vacuum resistance performance of heat-resistant PET bottles is: fill the heat-resistant PET bottle with normal temperature water, seal the bottle mouth with a rubber septum cap, and use a syringe Insert the needle into the bottle, slowly draw water to equilibrium (that is, when the bottle body is critically deformed), pull out the syringe, and measure the volume of water in the syringe to determine the vacuum resistance of the bottle. The disadvantages of using this method are: (1) Air may leak from many places such as the bottle cap and the bottle mouth, the rubber diaphragm and the needle, the needle and the syringe, the syringe...

AI Technical Summary

Problems solved by technology

The disadvantages of using this method are: (1) Air may leak from many places such as the bottle cap and the bottle mouth, the rubber diaphragm and the needle, the needle and the syringe, the syringe and the piston, and it is difficult to achieve a reliable seal. Leakage phenomenon, the detection data is unreliable, the more the air leaks, the more water can be extracted from the bottle, and the vacuum resistance performance of the bottle will be much larger than the actual value; (2) When vacuuming, it is required to slowly draw the syringe , the speed will affect the test results. Since the syringe extraction speed is manually controlled, different personnel may test the same bottle, and the results may be different.

The disadvantage of using this method is that there is a certain distance between the mouth of the heat-resistant PET bottle and the faucet of the thermostatic water heater, and the air in the bottle is freely emptied during filling, and no filling pressure will be generated.

However, on a normal beverage filling production line, there is a seal between the bottle mouth and the filling valve, the air in the bottle cannot be emptied freely, it will be squeezed and heated to generate filling pressure

Under this filling pressure, due to the thin wall of the bottle and the weakened strength of the bottle wall due to the filling temperature, the heat-resistant PET bottle sample is easy to be filled, and even exceeds its cooling shrinkage capacity, resulting in serious deformation

Therefore, the conclusion drawn by the laboratory filling test is not consistent with the filling test on the beverage filling line, and the laboratory test data of heat-resistant PET bottles can only be used as a reference

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