Pressure Decay Principle

หลักการทำงานของ Pressure Decay นั้นก็คือการสร้างแรงดันภายในบรรจุภัณฑ์ให้สูงกว่าแรงดันนอกบรรจุภัณฑ์  ทั้งนี้ก็ด้วยแรงดันที่เหมาะสมที่บรรจุภัณฑ์นั้นๆจะทนได้  หากบรรจุภัณฑ์มีรอยรั่ว แรงดันภายในที่มีมากกว่าก็จะพยายามไหลออกมาสู่ด้านนอก  ดังนั้นการวัดว่าบรรจุภัณฑ์รั่วหรือไม่ก็ทำโดยอุปกรณ์รักษาระดับแรงดัน และใช้เซนเซอร์ตรวจวัดแรงดันอย่างละเอียดพิเศษคอยตรวจดูว่ามีการสูญเสียแรงดันหรือไม่

PressureDecay



Leak detection of empty containers – before the filling and sealing process – is an important step to insure container integrity. Applications in the plastic, blow molding, food, beverage and pharmaceutical industries all require some type of online container integrity system. In addition to the basic inspection economics of reducing the amount of passed leaking containers and false rejects, there are many important factors to consider when evaluating what type of system is best. Important criteria includes: line speed, inspection rate/output, the container specification, handling requirements and required leak size (hole size). VeriCon offers a complete line of leak tester configurations to accommodate various container specifications and the level of test performance each application requires.

Principles of VeriCon Technology

VeriCon systems utilize either pressure decay or vacuum decay technology and a basic 3-step phase to each test cycle: Filling, Equalizing and Testing. Each VeriCon tester consists of either one or more testing stations (test heads). During the testing cycle, the container passes under the test head. During the filling stage, the container is filled with either pressure or for vacuum systems, a vacuum is pulled inside the container. The equalizing phase follows allowing either the pressure or vacuum to stabilize within the container. Then the amount of pressure or vacuum decay is monitored and measured during the test cycle which correlates to the presence of leaks within the container. Thepass/fail result displays on the operator panel and the defective container is rejected from the line.

The specification of pressure or vacuum is determined by the type of container and leak size that must be detected. Typically plastic containers of most any size always use pressure decay. Vacuum decay technology is used when the characteristic of the container would make it difficult to detect the presence of a certain size leak using pressure technology.

All VeriCon systems utilize high resolution non-drifting transducers (either pressure transducers or vacuum transducers) for consistent leak detection. The number of transducers relates to the number of test stations/heads. VeriCon testers are available in one to four station configurations, depending on the line speed/hole size requirement.

หากต้องการข้อมูลเพิ่มเติมเกี่ยวกับเรื่องนี้  กรุณาติดต่อที่ฝ่ายขาย  บริษัททาซาเทค  โทรศัพท์  02 938 1059


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