1、Designation:D433599(Reapproved 2010)Standard Test Method forDetermination of Component Retention of a MechanicalPump Dispenser1This standard is issued under the fixed designation D4335;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the evaluation of the forcerequired to remove the hood and the actuator from a mechani-
3、cal dispensing pump.1.2 This standard may involve hazardous materials,opera-tions,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toconsult and establish appropriate safety and healt
4、h practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for Testing3.Significance and Use3.1 This test method may be used to establish performancespecifications.3.2 This test method may be used
5、 to establish qualitycontrol assessment.4.Apparatus4.1 Test StandThe test apparatus shall be capable ofapplying a smoothly increasing load to the test specimen untilthe component is separated from the pump assembly.NOTE1The condition of 4.1 is fulfilled by most motor driven tensilestrength testers i
6、ncluding constant rate of elongation testers.NOTE2The test standard should be equipped with a maximum-forceindicator.4.2 Fixtures,to hold the mechanical pump dispenser.4.2.1 The fixtures must allow no slippage between the testspecimen and the fixture,so that distortion is avoided.4.2.2 The fixtures
7、for the test apparatus may be custom-made for this test.5.Sampling5.1 Select an appropriate number of dry,unused pumpdispensers at random for precision and accuracy desired.Useof 10 test specimens is recommended,but a minimum of threeis acceptable.6.Test Specimen6.1 Test specimens shall be clean,dry
8、,and previouslyunused mechanical pump dispensers assembled in the samemanner as in production.7.Conditioning7.1 If possible,condition the test specimens at 23 6 3C(736 5.4F)for not less than 4 h.If the test specimens are notconditioned at the recommended temperature,this should benoted in the test r
9、eport(see 9.1).8.Procedure8.1 Attach fixtures to the test stand in accordance with themanufacturers instructions or in a manner consistent with thepumps geometry.8.2 Adjust the test stand so that there is no force acting onthe specimen.NOTE3At this time,there should be a zero reading on the force ga
10、ge.8.3 Manual Method:8.3.1 Place the pump assembly into the fixture.8.3.2 Grasp the component to be separated in the hand.8.3.3 Pull the component as slowly as possible,avoidingquick,jerking actions.8.3.4 Continue to pull the component until it separates fromthe assembly.8.3.5 Observe and record the
11、 maximum force,N(lb),required to separate the component from the assembly.8.4 Machine Method:8.4.1 Place the pump assembly into the fixture.8.4.2 Secure the other component to the movable crosshead.1This test method is under the jurisdiction of ASTM CommitteeD10 onPackaging and is the direct respons
12、ibility of Subcommittee D10.33 on MechanicalDispensers.Current edition approved Oct.1,2010.Published March 2011.Originallyapproved in 1984.Last previous edition approved in 2006 as D4335 99(2006).DOI:10.1520/D4335-99R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact AST
13、M Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.4.3 Operate the test stand at a ra
14、te of 250 mm/min(10in./min).8.4.4 Stop the machine when the component has separatedfrom the assembly.8.4.5 Observe and record the maximum force,N(lb),required to separate the component from the assembly.9.Report9.1 The report shall include the following:9.1.1 Complete identification of the component
15、 tested,in-cluding materials of construction,size,and manufacturerscode and date of manufacture,if known,9.1.2 Number of specimens tested,9.1.3 Number of test specimens that were separated fromthe assembly,9.1.4 Mean,minimum,maximum,and standard deviation offorces required to separate the components
16、 from the assembly,9.1.5 Special storage conditions,if applicable,9.1.6 Description of the test apparatus,and9.1.7 Method used,whether manual or machine(see 8.3 and8.4).10.Precision and Bias10.1 PrecisionThe precision of Test Method D4335 ishighly dependent on the interference requirements of theparticular pump components tested.One laboratory has inves-tigated one particular pump actuator removed from one par-ticular pump piston with 82 replicate tests,yielding an averageof 6.24 lbf with a rang
