Dart Drop Impact Tester

การทดสอบการตกกระแทกของฟิล์ม (Dart Drop Impact Tester)  เพื่อดูว่าจะต้องใช้พลังงาน หรือน้ำหนักแค่ไหน ที่จะทำให้วัสดุเสียหายได้

เครื่องทดสอบการตกกระแทก (Dart Drop Impact Tester)  มีจำแนกอยู่หลายประเภท ขึ้นอยู่กับชนิดของวัสดุที่จะนำมาทดสอบ เช่น พลาสติก คอมโพสิต เซรามิค หรือแม้กระทั่งโลหะ ที่ไม่ใช่โลหะเนื้อแข็ง ที่ต้องการทดสอบเรื่องการรับแรงกระแทก ก็จะนำมาทดสอบกับเครื่องประเภทนี้ซึ่งก็มีอยู่หลาย รูปแบบ ทั้งแรงกระตกแทกจากแนวตั้ง หรือแนวนอน ตามแต่มาตรฐานที่วัสดุแต่ละชนิดระบุไว้

The Ray-Ran Advanced Falling Dart Drop Impact Tester provides simpler method for determining the energy that causes thin flexible materials such as plastic film, paper and composite sheets to fail under specified conditions of impact from a free-falling dart. The energy required to cause Initial Failure to the test specimen is expressed in terms of the darts weight which would result in the failure of 50% of specimens being tested. The instrument complies with the ASTM D1709 Method A& B and ISO7765 part 1.

Utilizing on-board microprocessor technology, the Ray-Ran Microprocessor Controlled Falling Dart Impact Tester has taken falling dart testing machines to an advanced level at an affordable price. Built with operator simplicity in mind, its ease of operation and high accuracy makes it ideal for product development and quality control within production, research & development labs and teaching institutions.

The large on-board liquid crystal display (LCD) provides simple on-screen instruction and using the alpha/numeric membrane keypad test parameters such as usernames, material reference numbers, batch numbers and dart types are entered and stored in operator lists for future recall and results presentation. Selecting the type of test is done at the press of a button and the testing parameters such as drop height; dart weight and sample size are entered to give the required testing conditions.

To comply with the relevant test standards, a fixed dart drop height of 660mm and 1 ½” spherical radius tup (method A,) and optional 1524mm height and 2” spherical radius (method B) are used. The dart release mechanism is pneumatically actuated and requires the use of both hands to release the dart to ensure maximum operator safety. A clamp guard is also supplied to ensure the operators safety from falling and rebounding darts which can be removed for easy dart retrieval. 

The methods of holding the test specimen and releasing the dart are designed so that they may be accurately repeated for each test performed. Test specimens are simply clamped in the unique two-piece clamp system which gives a constant tension across the surface area of the specimen ensuring test repeatability. A dart of a known weight is then allowed to free fall and hit the sample. The addition or removal of known weights determine the Initial failure of the sample.

Fails and Non fails are stored and automatically plotted then calculated to give the final result making the test easier for the operator.

An optional floor mounted stand and method B testing kit are available. 

The apparatus is supplied as standard with Ray-Ran’s Techni-Test Windows based PC software for connection to the apparatus via a mini USB or ethernet connection. Test results can be printed directly from the Techni-Test software or can be saved and exported as .CSV files which can be opened with Microsoft Excel in tabular form which can be manipulated to your specific requirements such as preparing a graphical presentation or copying the results to a Word document for a report presentation if required.