低溫彎折儀
編號：GD201311280004
規格：WZY-A
【詳細說明】
低溫彎折儀操作規程溫彎折儀根據標準GB12952-91, GB/T16777-1997的要求設計制造，既適合做防水卷材的要求設計制造,
低溫彎折儀 操作規程：
1、按 GB12953—2003 的圖 1 表 4 裁取試件，將試件的迎 水面朝外，彎曲 180 度，使 50mm 寬的邊緣重合;齊平；并固 定。將彎折儀上下平板距離調節為卷材厚度的 3 倍。
2、儀翻開，把兩塊試件平放在下平板上，重合的一邊朝 向轉軸，且據轉軸 20mm。在設定溫度下將彎折儀與試件一起 放入低溫箱中，達到規定溫度后在此溫度下放置 1h。然后在 標準溫度下將上平板 1s 內壓下，達到所調間距位置，在此位 置保持 1s 后將試件取出。恢復到室溫后觀察彎折處是否斷裂， 或用 6 倍大放大鏡觀察試件彎折處有無裂紋。
高分子防水涂料 將試件在標準條件下放置 2h 后彎曲 180 度，使 25mm 寬 的邊緣對齊，用訂書機將邊緣外固定，調整彎折儀的上平板與 下平板的距離為試件厚度的 3 倍， 然后將試件放在彎折儀的下 平板上，試件重疊的一邊朝向彎折機軸。據轉軸中心約 25mm 的彎折儀放入低溫箱中，再規定溫度下保持 2 后打開低溫箱， 保持 1 出試件并用 8 倍放大鏡觀察試件。 在 1 內將上平板壓下， 四、 記錄試件表面有無裂痕或開裂現象。
Low temperature bending apparatus
Number: GD201311280004
Specification: WZY - A
"Detail"
Low temperature bending machine operation procedures temperature bending apparatus according to the standard GB12952-91, the requirements of GB/T16777-1997 design and manufacturing, is suitable for the requirements of waterproofing design and manufacture,
Low temperature bending apparatus Operating procedures:
1, according to figure 1 GB12953-2003 table 4 cropping specimens, will meet the surface of the specimens, bent 180 degrees, make the edge of the 50 mm wide overlap; Flush; And fixed. The thickness of upper and lower plate distance adjustment for coil bending apparatus three times.
2, open, put the two pieces of flat specimen on a flat, one side of the overlap toward to the rotating shaft, and according to the axis of 20 mm. Will bend under the set temperature meter, together with the specimen in the low temperature box, reach the specified temperature place 1 h at this temperature. Then under the standard temperature will tablet 1 s under internal pressure, achieve the space position, in this place to keep remove specimen after 1 s. After return to room temperature observation inquire whether bending fracture, or with 6 times as big as a magnifying glass to observe specimen bending crack.
Polymer waterproof coating place specimen under standard conditions after 2 h bent 180 degrees, make the 25 mm wide edge alignment, the edge of the external fixation with stapler, adjust the bending device on the tablet and the specimen thickness of the plate distance under the conditions of the three times, then put the specimen on the plate under bending apparatus, one side of the specimen overlap toward bending machine shaft. According to the rotation center of about 25 mm bending apparatus in the low temperature box, again under the specified temperature for 2 after open the cryostat, to keep the specimen with eight times a magnifying glass observation specimen 1. On within 1 tablet press, four, record the specimen surface with and without cracks or cracking phenomenon.
