ASTM D2562-94(2002)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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e1
Designation:D2562–94 (Reapproved 2002)
Standard Practice for
Classifying Visual Defects in Parts Molded from Reinforced
Thermosetting Plastics
This standard is issued under the fixed designation D 2562; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorially revised 1.2 in March 2002.
1. Scope retapped to clean them or remove flash. Threads containing
locking features may not be retapped.
1.1 This practice covers acceptance criteria for visual in-
2.4 Molded-In Threads or Cored Holes— Molded-in
spectionofpartsmoldedfromreinforcedthermosettingplastics
threads or cored holes shall be free of visible defects, such as
by compression and transfer molding.
nicks, cracks, shorts, etc. Molded-in threads may be retapped
1.2 This practice presents word descriptions of possible
or repaired unless otherwise specifically noted on the product
defects to serve as a guide for contracts, drawings, product
drawing.
specifications, and final inspection.
2.5 Workmanship—Workmanship shall be in accordance
1.3 This practice also categorizes different inspection re-
with good commercial practices.
quirements for grades of product quality.
2.6 Critical Areas—Areas in which the presence of imper-
1.4 The values stated in SI units are to be regarded as the
fections is considered to be detrimental to the proper function
standard. The values given in parentheses are for information
of the part shall be designated as critical areas. The areas of a
only.
part that are critical structurally, aerodynamically, or electri-
1.5 This standard does not purport to address all of the
cally shall be uniform and free of defects as listed in Table 1,
safety concerns, if any, associated with its use. It is the
if so stated on the product drawing. Critical areas may be
responsibility of the user of this standard to establish appro-
designated on the product drawing by one of the following
priate safety and health practices and determine the applica-
means,
bility of regulatory limitations prior to use.
2.6.1 Encircle critical areas, or
NOTE 1—There is no known ISO equivalent to this practice.
2.6.2 Cross-hatch areas to designate areas of various levels,
or
2. Acceptance Criteria
2.6.3 Word description.
2.1 The method and frequency of sampling and the allow-
2.7 Acceptable Defects—Unless otherwise specified, the
able defects may be previously agreed to by the purchaser and
following defects shall be acceptable in all instances:
the seller.
2.7.1 Ripple Surface—Generally occurs in parts molded
2.2 Dimensions and Tolerances—Molded parts shall be
from long, glass-fiber-filled, high-impact-type plastics. Such a
inspected for conformance with the dimensions and tolerances
surface is a phenomenon resulting from the difference in
specified on the product drawing. Parts with any dimensions
shrinkage between the resin binder and reinforcement.
falling outside the specified limits shall be rejected.
2.7.2 Shrink-Mark—Adimple-like depression in the surface
2.3 Inserts—All inserts, nuts, studs, and lugs shall not be
of a molding where it has retracted from the mold, and which
damaged in any way, nor coated with molding materials in
has well-rounded edges. A shrink-mark generally occurs on
such a way as to impair function or mechanical fit. Threads in
one surface of a part where there is a boss, flange, rib, or other
molded-in inserts shall be clean, smooth, and free of nicks,
heavy section on the opposite surface.The shrink-mark may be
tears, or other damage. There shall be no molding material or
caused by the difference in total shrinkage when there is a
flash on the threads. If necessary, threaded inserts may be
sudden change in section along the surface of the part.
2.7.3 Resin Voids—Applicable to chopped fabric-reinforced
molding compounds only, appearing as multiple surface inter-
This practice is under the jurisdiction ofASTM Committee D20 on Plastics and
is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting
ruptions which conform to the pattern of the cloth weave. This
Plastics.
is usually due to an insufficient flow or shrinkage of the resin,
Current edition approved February 15, 1994. Published April 1994. Originally
published as D 2562 – 66 T. Last previous edition D 2562 – 70(1988).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2562–94 (2002)
TABLE 1 Allowable Defects
Visual Acceptance Levels
Name Definition
Level I Level II Level III
Chip a small piece broken off an edge or surface none maximum dimension of break, 3.0 maximum dimension of
1 1
mm ( ⁄8 in.) break, 6.5 mm ( ⁄4 in.)
Crack an actual separation of the part, visible on none none none
opposite surfaces, and extending through the
thickness
Crack, surface crack existing only on the surface of the part none maximum length, 3.0 mm ( ⁄8 in.) maximum length, 6.5 mm
( ⁄4 in.)
Crazing fine cracks at or under the surface of a part none maximum diameter of crazing, 13 maximum diameter of
mm ( ⁄2 in.) crazing, 25 mm (1 in.)
frequency to be determined by customer
Fracture rupture of the plastic surface without none maximum dimension, 21 mm ( ⁄16 maximum dimension, 29 mm
complete penetration in.) in diameter (1 ⁄8 in.) in diameter
Air bubble air entrapment within and between the none maximum diameter, 1.5 mm ( ⁄16 maximum diameter, 3.0 mm
2 2
reinforcement, usually spherical in shape in.); 2 per in. ( ⁄8 in.); 4 per in.
Blister rounded elevation of the surface of a part, none maximum diameter, 3.0 mm ( ⁄8 maximum diameter, 6.5 mm
with boundaries that may be more or less in.); height from surface not to be ( ⁄4 in.); height from surface
sharply defined, somewhat resembling in outside drawing tolerance not to be outside drawing
shape a blister on the human skin tolerance
Orange-peel uneven surface somewhat resembling an none maximum diameter, 13 mm ( ⁄32 maximum diameter, 29 mm
orange peel in.) (1 ⁄8 in.)
Pimple small, sharp, or conical elevation on the none none maximum diameter, 3.0 mm
surface of a part ( ⁄8 in.)
Pit (pinhole) small crater in the surface of the part, with its none maximum diameter, 0.25 mm maximum diameter, 0.50
width approximately of the same order of (0.010 in.); depth less than 10 % mm (0.020 in.); depth less
magnitude as its depth of wall thickness than 20 % of wall thickness
frequency to be determined by
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