Car door frame seal strip cutting sample selection
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The car door frame seal is one of the most important seals in automotive seal products and dominates in the evaluation of the entire vehicle seal quality. In the performance test of the door frame seal, it is sometimes necessary to select the cross-sectional sheet as a test sample. For example, detection of cross-section bubbles, pits, delamination cracks, coatings, etc.
The automobile door frame seal is mainly composed of a clamping part for mounting and fixing and a sealing part for sealing. The main raw material is EPDM. The loading section is mainly composed of a dense rubber matrix. The dense rubber contains a metal frame to enhance the shaping and fixing of the strip and prevent it from being disengaged or falling off during work. The sealing part is composed of sponge foam tube base body. The sponge glue tube is soft and elastic, and has the function of pressure deformation, pressure relief and rebound. In addition, sometimes in order to meet the various performance requirements of the door frame seal, many auxiliary materials will be added, such as steel strips, galvanized steel wire, flannel, and the like.
For the cutting of such multi-component composite structural parts, it is necessary to comprehensively consider the physical properties of each component and the influence of each other, and select the best cutting equipment and cutting speed.
The diamond wire cutting machine adopts the reciprocating motion of the diamond wire to realize the cutting function. The worktable is cutting and feeding with 0.01mm step accuracy, which ensures the smoothness of the cutting process and the flatness of the cutting surface. Diamond wire cutting machine is suitable for precision cutting of many kinds of materials, such as glass, crystal, ceramics, rock samples, metals, plastics, PCB, refractory materials, etc. Therefore, a diamond wire cutter is used to cut the sheet of the automobile door frame seal. As shown in the figure below, a car door seal strip is cut for the STX series diamond wire saw. The left part is a clamping part consisting of a dense rubber matrix, which contains an alloy metal frame; the right part is the sealing part of the sponge bubble tube matrix.
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