低温弯折仪
编号：GD201311280004
规格：WZY-A
【详细说明】
低温弯折仪操作规程温弯折仪根据标准GB12952-91, GB/T16777-1997的要求设计制造，既适合做防水卷材的要求设计制造,
低温弯折仪 操作规程：
1、按 GB12953—2003 的图 1 表 4 裁取试件，将试件的迎 水面朝外，弯曲 180 度，使 50mm 宽的边缘重合;齐平；并固 定。将弯折仪上下平板距离调节为卷材厚度的 3 倍。
2、仪翻开，把两块试件平放在下平板上，重合的一边朝 向转轴，且据转轴 20mm。在设定温度下将弯折仪与试件一起 放入低温箱中，达到规定温度后在此温度下放置 1h。然后在 标准温度下将上平板 1s 内压下，达到所调间距位置，在此位 置保持 1s 后将试件取出。恢复到室温后观察弯折处是否断裂， 或用 6 倍大放大镜观察试件弯折处有无裂纹。
高分子防水涂料 将试件在标准条件下放置 2h 后弯曲 180 度，使 25mm 宽 的边缘对齐，用订书机将边缘外固定，调整弯折仪的上平板与 下平板的距离为试件厚度的 3 倍， 然后将试件放在弯折仪的下 平板上，试件重叠的一边朝向弯折机轴。据转轴中心约 25mm 的弯折仪放入低温箱中，再规定温度下保持 2 后打开低温箱， 保持 1 出试件并用 8 倍放大镜观察试件。 在 1 内将上平板压下， 四、 记录试件表面有无裂痕或开裂现象。
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.
