Mobile pencil occupation standard

From;  Author:Stand originally
This standard of   of QB 1023-91 of pencil of activity of occupation standard of People's Republic of China consults use 917 7 of   of international standard ISO, 1 " mobile pencil, the first: Classification, dimension, function asks and check " .
1 theme content and suitable scope
The quality target that this standard set mobile pencil and law of check proved recipe reach a requirement.
This standard applies to pulsatile type activity pencil and object pencil of core type activity.
2 cite standard
GB2828 chases programs of batch of examination sampling by attributes to reach sampling table (apply to the examination that approves continuously)
GB5945 is light industrial product aluminium or the test method that aluminium alloy oxidation handles a layer
QB1024 activity pencil uses   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of   of graphite core    3 products are classified
Mobile pencil gives core way by its different cent is mixed for pulsatile type object core type. When outside force every action at giving core orgnaization, plumbic core outputs what certain length is worth to be pencil of pulsatile type activity, when the master piece outside becoming is used at giving core orgnaization, plumbic core falls to fall freely in gravitational action to drop pencil of core type activity.
The data that uses according to mobile pencil component and structure are different, can divide for advanced, intermediate with pencil of general class activity. The mobile pencil that has metallic machine core and metallic shaft or shaft surface classics to decorate sexual craft to handle is advanced article; The pencil of plastic shaft activity with simple structure is tasted for promotion, interpose at both between person for intermediate article. 4 technologies ask
4. The quality of 1 activity pencil should accord with a watch 1 regulation. Demand of technology of serial number project is high taste intermediate the class that taste general tastes pulsatile type to drop core type is pulsatile type of type dropping core is pulsatile 4.90 of ≥ of 4.90 of ≥ of Mm 0.35 of diameter of core of N of force of core of lead of clip of 1 of type of type dropping core -- needle of core of 5.39 2 of ≥ of 5.88 of ≥ of 6.37 of 0.5 above ≥ suffers force N
Millimeter / Mm 0.35 0.3 of second core diameter, 0.7

-- 0.3, 0.7 -- -- -- 0.5 0.4, 0.8 0.4, 0.8 0.4, 0.8 0.7 0.5, 1.0 0.5, 1.0 0.5, 1.2 1.0 0.7, 1.3 0.7, 1.3 0.7, 1.5 1.4 1.2, 1.8 1.2, 1.8 1.2, 1.8 2.0 1.6, 2.4 1.6, 2.4 1.6, 2.4 5 is defeated by plumbic core function to fall continuously freely freely continuously successive and free, impact resistance of unoccupied place 8 of very close to each other of flexibility of clip of pen of second ≥ 10000 7 can be defeated by plumbic core successive, component is out of shape without craze 9 oxidation film is able to bear or endure corrode, s ≥ 40 ≥ 20 -- 10 plating chromic layer is able to bear or endure corrode, 3 of ≥ of Min ≥ 4 -- 11 exterior component is complete, without craze; On a lump-sum basis and fittings are not had mix askew apparently bend; The exterior is bright and clean and shining; Mark, handwriting can identify 4. Pencil of 2 various activities is high grade tasted each quality index besides should accord with a watch outside 1 regulation, force of the core that place lead should accord with a watch 2 regulations. Core diameter norms, mm 0.35 ≥ 0.5 places plumbic core force, 8 4 of ≥ of N ≥ 5. 3 average level taste mobile pencil high grade tasted each quality index besides should accord with a watch 1, outside expressing 2 regulations, length of core giving lead asks to answer with advanced taste and intermediate requirement of tasted length of core giving lead is identical. 4. The 4 plumbic core that use for mobile pencil should accord with the regulation of QB 1024.
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