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Draft Gloss and Texture Procedure_rev 3

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Draft Gloss and Texture Procedure_rev 3

    CORPORATE POLICIES, PROCEDURES & INSTRUCTIONS

    Gloss and Texture Control Subject:

    Revision: Reference: Effective Date: Page: ; POLICY ; PROCEDURE ; INSTRUCTION

    New ?/??/08 1 / 3 No.: P???

    Written by: Title: Signature: Robert Britton PFR Quality Engineer Copy #

    Approved by: Title: Signature: Bob Huff Director of Sustaining Engineering

    1.0 OBJECTIVE

    1.1 To define the procedure for establishing and maintaining Gloss and Texture

    control for specific surfaces on molded parts.

    1.2 Specification includes parts molded at Pass & Seymour and external contract

    molders.

    2.0 SCOPE

    2.1 Includes thermoplastic parts that require a low gloss finish. 2.2 Excludes thermoplastic parts that require a high gloss (Bright finish). 2.3 Excludes thermoset parts.

    3.0 DEFINITIONS

    3.1 Gloss Unit is the measurement designation for the amount of gloss reflected off

    a surface from a light source when viewed at a prescribed angle (P&S to use 60

    degrees).

    3.2 Ra, roughness average value defines the average height, in micro-inches, of the

    surface peaks. (For example, low Ra values indicate a smoother surface. See

    figure 3)

    3.3 PC, Peak count, defines the number of high/low peak pairs per inch on the

    surface. (For example, low peak count values indicate a smoother surface. See

    figure 3)

    3.4 Gloss Meter is the instrument used to measure gloss. The instrument to use is

    BYK Gardner micro-gloss 60 degree model GB-4501 or AG-4460; or

    engineering approved equivalent. (see Figure 1)

    3.5 Roughness Tester (Profilometer) is the instrument to measure the surface

    finish Ra, and PC. The instrument to use is Mahr model M2 tester (or

    engineering approved equivalent). (see Figure 2)

Figure 1 Gloss Meter Figure 2 Roughness Tester

    CORPORATE POLICIES, PROCEDURES & INSTRUCTIONS

    Gloss and Texture Control Subject:

    Revision: Reference: Effective Date: Page: ; POLICY ; PROCEDURE ; INSTRUCTION

    New ?/??/08 2 / 3 No.: P???

     Figure 3

    4.0 RESPONSIBILITIES

    4.1 Engineering is responsible for:

    4.1.1 Determining and maintaining the Gloss and Texture specifications. 4.2 Specifying the equipment used to measure, per the specifications.

    4.2.1 Maintaining the Gloss and Texture Control Procedure.

    4.2.2 Issuing the Gloss and Texture specifications to all involved parties. 4.3 The Manufacturing Plants are responsible for:

    4.3.1 Implementing the Gloss and Texture Control Procedure.

    4.3.2 Establishing the frequency of part measurements of production materials

    and/or purchased plastic product.

    4.3.3 Collecting and storing of the data taken from Gloss and Texture

    measurements.

    4.3.4 Maintenance of Gloss and Texture measurement equipment.

    5.0 REFERENCES

    5.1 Sustaining Engineering Gloss and Texture Specification E0005 in e-Matrix.

    6.0 PROCEDURE

    6.1 Measurement of Gloss

    6.1.1 Calibrate the Gloss meter before each use. With the instrument in the

    case, push the top mode button one time so it reads calibration then

    push the operate button.

    6.1.2 Measure the part by placing the instrument over a flat surface on the part.

    Ensure that the measurement port of the instrument is completely

    covered on the part.

    6.1.3 Push the mode button until it reads Statistic, then take 3 readings on the

    part. The average of the 3 will be the recorded value.

    CORPORATE POLICIES, PROCEDURES & INSTRUCTIONS

    Gloss and Texture Control Subject:

    Revision: Reference: Effective Date: Page: ; POLICY ; PROCEDURE ; INSTRUCTION

    New ?/??/08 3 / 3 No.: P???

    6.1.4 If product is not to specification then parts are to go on hold for

    marketing disposition.

    6.2 Measurement of Texture

    6.2.1 Texture roughness to be measured with Mahr, model M2, surface

    roughness tester. The instrument settings should be set as follows:

    6.2.1.1 Measurement standard: ISO

    6.2.1.2 Traversing length, Lt: 0.700 inches.

    6.2.1.3 Cut-off length, Lc: 0.100 inches.

    6.2.1.4 Upper intersection line from mean for PC, C1: 20

    microinches

    6.2.1.5 Lower intersection line from mean for PC, C2: -20

    microinches

    6.2.1.6 Calibrate the roughness tester before each use.

    6.2.1.7 Ensure that the calibration plaque is used to obtain the

    instrument correction value. Place the calibration plaque flat

    on a level surface, then position the instrument stylus rails

    parallel to the plaque, so that the stylus is touching the plaque.

    Press start and ensure that instrument reading is within

    tolerance of the plaque marked value.

    6.2.1.8 Perform calibration. If acceptable then prepare the part to be

    measured.

    6.2.1.9 Measure the part 3 times across a flat surface of the part.

    Record the data.

    6.2.1.10 If the parts are not to specification then parts are to go on

    hold for Marketing disposition.

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