Standard Number: GB/T 14486-2008
Title: Dimensional tolerances for moulded plastic parts
Language: Simplified Chinese
Publication Date: 2008/8/14
Execute Date: 2009/4/1
Standard Type: Generalites
Publisher: Chinese Standards(GB)
Number of Pages:12
Preface: This standard with the German national standard DIN16901:1982 plastic molding parts size tolerance and test condition of consistency degree is not equivalent, the main differences are as follows: A) the basic size block is different, the standard basic size segmentation and ISO286-88 standard, same took 0 mm to 1000 mm Became a 28 size section, the German standard size only 21. B) the relationship between the tolerance value and size are different, under the corresponding precision grade, at 0 MM ~ 100 MM small size range of tolerance values both similar, or slightly less than the standard German standard individual tolerance values, but in large size range far instead. This standard The allowed tolerance value is smaller than the German standard, in terms of accuracy, high about half precision grade. Instead of this standard GB/T14486-1993 engineering plastics molding plastic parts size tolerance. Compared this standard with GB/T14486-1993, the main differences are as follows: A) the name of this standard by the engineering plastics molding plastic Shipping/size tolerance, changed its name to the plastic molding parts size tolerance. B) the original tolerance value of national standard GB/T14486-1993 is generally less than those in the German industrial standards DIN16901 tolerance value of the products with same size precision, but also within the scope of 0 mm to 100 mm has some opposite, revision Some reference to the German industrial standards in these smaller tolerance value, to adapt to the plastic pieces of the current situation of increasing precision and requirements. C) the tolerance table size range from 0 mm ~ 500 mm extension to 0 mm to 1000 mm, increases the tolerance value of the corresponding. D) materials, which are used in table 2 molding parts selection of dimensional tolerance level The supplement and correction. This standard annex A is normative appendix. This standard put forward by China petroleum and chemical industry association. This standard by the national standardization technical committee plastic under centralized. This standard drafting unit: the sichuan university, nanjing lung engineering plastics co., LTD. In this standard drafting unit: changhong plastic electronics industry company Five branch factory. Main drafter of this standard: "intelligence and Fen zheng-yuan wu and wu, xue-qin gao. This standard replaced all previous releases of standard: GB/T14486-1993.
Description:This standard instead of gb/t 14486-1993 "engineering plastics molding plastic parts size tolerance.
this standard specifies thermosetting and thermoplastic plastic molding parts size tolerance.
this standard applies to injection molding, casting molding, transfer and plastic molding parts. Not suitable for extrusion, blow molding, sintering and foam molding parts.
this standard compared with gb/t 14486-1993, the main differences are as follows :
a) of this standard by the name of the "engineering plastics molding plastic parts size tolerance" renamed "plastic molding parts size tolerance"
b) the original national standard gb/t 14486-1993 in tolerance value is generally less than the German industrial standards of din 16901 products with same size precision of tolerance values, but within 0 mm to 100 mm also has some opposite, when the revised parts with reference to the German industrial standards These smaller tolerance value, so as to adapt to the present situation and the parts precision increasing demands.
c) the tolerance table size range from 0 mm ~ 500 mm extension to 0 mm to 1000 mm, increases the tolerance value of the corresponding. "
d) in table 2 the selection of commonly used material molding pieces of size tolerance grade" supplement and correction.
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Tile in English: Dimensional tolerances for moulded plastic parts