Source: Link Testing Instruments co.,ltd
Plastic bottles are commonly used in modem packaging material, its appearance is beautiful , easy processing.convenient and low cost is widely used in food and beverage,medicine,cosmetics and other industries.The processing of plastic bottles is generally used in the process of injection molding.and then blow molding and so on.
In blow molding process is subject to he temperature,the equipment will be affected by the bottle body, the bottom of the bottle and other parts of uneven thickness.The thinner pars of plastic bottle is general with thin mechanical properties (such as load capacity.pressure capacity)barrier properties such as water vapor and oxygen permeation rate)of the weak pars,which reduce the performance of the plastic bottle which cant accomplish its use effect
Since the plastic bottle wall thickness so important so now there are several kinds of testing instruments on the market to be able to detect the thickness of the bottle wall. What are the methods and principles of ts measurement? Professional factory -Link Testing Instruments co.,ltd will introduce for everyone:
1. Magnetic induction thickness tester
The principle of this method is based on the theory of Hoizer effect the thickness,the side of a small ball placed on the test material an the probe placed on the other side.Turn the bottle, while the magnetic ball receiving probe mobile.The magnetic induction sensor can measure the distance from the probe tip to the ball so that the thickness on the plastic bottle.The instrument is characterized i that it does not destroy the sample which is convenient to measure.But for the concave and convex parts of the plastic bottle is not easy to measure,the instrument cost is higher.
2. Contact measurement method. This wall thickness measurement method is now widely used in wall thickness measurement. The principle is: Put measuring support rod into the bottle Contact measuring pats with darts, capacitive sensor measuring gauge is placed in corresponding position plastic bottle outside and finish the test. Read the thickness values on the measuring table.You may refer to the CHY-B wall thickness tester. This kind of test principle is quick, the measuring position is comprehensive, the fitting is easy to be replaced, the cost is low.But the request on the stability of the mechanical structure of the instrument is higher.
For more details please visit our website www.linktesting.org