7 停止線f，圖2。該繩索從線軸p，圖2通過試樣框架和試驗(yàn)室壁上提供的適當(dāng)螺紋導(dǎo)管延伸，允許繩索在距點(diǎn)火火焰中心撞擊試樣點(diǎn)5英寸處的適當(dāng)位置進(jìn)行系帶。停止線由50號(hào)絲光縫紉線組成，紡織品阻燃性測試儀，用于測量試樣火焰的上升和蔓延。
(7)
stop cord (f， fig. 2). this cord，銷售紡織品阻燃可燃性測試儀， stretched from the spool ( p， fig.
2) through suitable thread guides provided on the specimen frame&chamber
walls， permits the lacing of the cord in the proper ition exactly 5 inches
from the point where the cct of the ignition flame impinges on the test
specimen. the stop cord cists of a no. 50 mercerized sewing thread and
measures the rise&spread of the flame from the test specimen.
lfy-602b 小45°阻燃性能測定儀主要用途
2、采用集微電子技術(shù)、計(jì)算機(jī)技術(shù)、自動(dòng)控制技術(shù)于一體的plc控制，利用其內(nèi)部循環(huán)掃描的工作方式，對整個(gè)燃燒過程進(jìn)行--控制測量。
4、點(diǎn)火時(shí)間：1s、5s、20s，分辨率：0.01s
5、點(diǎn)火器口徑：41/2號(hào)針頭
6、試樣尺寸：150mm×50mm
7、試樣架：可支撐、固定試樣夾，使其傾斜為45°角，并可根據(jù)試樣的不同厚度調(diào)節(jié)其與火焰前端的相對位置。
8、試樣夾尺寸：由兩塊厚度2.0mm的u形鋼板組成，內(nèi)框：152mm×38mm，可燃性，試樣固定于兩板中間，兩邊用夾子夾緊。
(2)
specimen rack (b，生產(chǎn)紡織品可燃性測試儀， fig. 2). the specimen rack provides supports for the
frames in which the specimens are mounted. the angle of inclination is 45°. two
guide pins projecting downward from the cct of the base of the rack travel
in slots provided in the floor of the chamber so that adjustment can be made
for the thickness of the specimen in relation to the flame front. a stop is
provided in the base of the chamber to assist in adjusting the ition of the
rack.
2 樣本架b，圖2。樣品架為安裝樣品的框架提供支撐。傾角為45°。從機(jī)架底座中心向下-的兩個(gè)導(dǎo)銷在燃燒室地板上的槽中移動(dòng)，以便調(diào)整試樣相對于火焰的厚度。腔室底部設(shè)有止動(dòng)塊，以幫助調(diào)整齒條的位置。
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