Making Building Blocks with the ClNVA-Ram Block Press_0.docx

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1、down,lipitintoplaceonitsside.Trytohaveatleasttwomenoperatingthemachine,becauseitisverytime-consumingtohaveonemanmovingfromonesideofthemachinetotheothertopressandeject.Butitcanbedonebyonemanifonlyoneisavai1ab1e.Fourpersonsmakeanidealteamforpressing:onefilling,onepressing,oneejecting,andoneremoving.te

2、amoffourcaneasilyproducetwoblocksaminuteifthemixtureispreparedandcloseby.Stickinq.SomesoiIsstickmorethanothers.Anoccasionalcleaningofthecornersofthepressboxwithametalscrapermaybenecessary.Theblocksshouldcomeoutofthepresswithsharpcorners.Stickingcanbeovercomebyslightlymoisteningthepointswhereitoccurs

3、withabitofkeroseneonarag.RotatiwJobs.Onajobwherethereisenoughlabortohaveallthesteps-digging,screening,mixing,loading,pressing,ejecting,andcarrying-goingonatthesametime,itisfairandgoodformoraletorotatethejobseveryhourorso.MaintenanceandRepairs1.ubrication.Al1movingparts(rollers,pins,pressureplate,gui

4、deplates,pistonscylinder,bearingsandsupportsofaxles)shouldbewel1lubricatedeveryfourtoeighthourswithheavyoilorgreasetoinsuresmoothoperationandcutdownonwear(SeeFig.15).Pins.Thepinswhichsecurethepivotshafts,compressionyokeandrolIersshouldbereplacedwhenbrokenbythelargestnailsavai!able,becausetheywilllas

5、tlongerthantheaveragecotterpin.IfCringreplacementsarenotavai!able,brokenCringscanbereplacedbywrappingapieceofwireinthegroove.CleanSurfacee.Theinsideoftheboxandtheundersurfaceofthecovermustbekeptclean.Fig.15-1.ubricationPoints52.Adiustments.TheCINVA-Rampressshouldnotbetamperedwithun-necessarily,butth

6、efollowingsuggestionsmayhelpifthepressproducesfaultyblocks.53.BreaksandCracks.Breaksandcracksarecausedbylooseorin-correctlyadjustedguideplates.54.SideBreaks.(SeeFig.16.)Movetheloweradiustingbolts(GandH)side-vaystowardthehighsideofthebreak(seeFig.1).Ifmoreadjustmentismd-needed,movetheupperadjustingbo

7、lts(RandP)towardthelowsideofthebreak.ThiscansometimesbedoneFig.16-SideBreaksimplybyha11meringtheboltside-ways(withapieceofwood,sothatthethreadswi1notbedamaged)ratherthanbylooseningandtighteningthenuts.Aftertheboltsarehanrmeredover,tightenthenuts.55.EndBreaks.(SeeFig.17.)Movetheguideplateoppositethee

8、ndwherethebreakoccursinwardbyturninglower-14-adjustingboltGorH,dependingontheguideplatetobemoved(seeFig.1)：NOTE:Movingoneendofaguideplateinonedirectionforcestheotherendofthesameplateintheoppositedirection.Ifthisloosensthepistonmuchateitherthetoporthebottomoftheguideplate,theotherendoftheplatemustbem

9、ovedinward.ThefreeplayshouldbecorrectedbecauseitwiHcausetheQiSlOntocracktheblocksbycompressingtheminonedirectioninthecompressioncycle(withtheuppersaddleasthepivotpoint)andinanotherdirectionintheeject,ioncycle(withthelowerrolIersasthepivotpoint).Also,theguideplatesmustbetightenoughagainstthepistontok

10、eepitfromjerkingandjumpingupwardattheendoftheejectioncycle.56.Ifendcrackingisnotstoppedbytighteningtheplatesagainstthepiston,itmaybenecessarytotilttheguideplatesandthepiston,sothatthepressureplatewillbehigherattheendwhichiscracking,Thisisdonebymovingthetopsofbothguideplatestowardthecrackedend.57.Cor

11、nerBreaks.cornerbreakiscausedbyacombinationofm-*asidebreakandanendbreak(seeFig.18).(1)Fixthesidecrackbymov-ingtheboltssideways,asFig.18-CornerBreakinparagraph54(usuallyitisonlynecessarytomovethebottomboltontheendwiththecracktowardtheBidewherethecrackoccurs).(2)Fixtheendcrackbymovingtheloweradjusting

12、boltoppositethecrackingendinwardagainstthepiston,asinparagraph55.58.Taperiq.Taperingiscausedbyincorrectlyadjustedguideplates.59.SideTaper,(SeeFig.19.)Firstmovetheguideplateonthethickersideoutward：thenmovetheotherguideplateinward(seeFig.1).Theguideplatesshouldbekeptparalleltoeachother.Moveboththetops

13、andbottomsofbothguideplatesthesamedistance.B.Fig.19-SideTaper60.EndTaper.(SeeFig.20.)Movethetopsofbothguideplatestoward-the,thinend.Movethebottomsofbothguideplatestowardthethickend.(SeeFig.1).Thetopsshould/bemovedasfarinonedirectionasthebottomsareintheother.1.!izzlFig.20-EndTaper-15-61.62.63.64.65.6

14、6.67.CuringandStackinutheBlocks.Thecuringoftheblocksisanotherimportantstepwhichmustbetakenwithcare.Tobecomecarelessatthispointcouldruinal1thecarefulworkthathasgonebefore.Themoistureintheblocksmustcomeoutslowlyandevenly.ITheblocksshouldhelaidonflat,unwarped,cleanplankswideenoughtosupportthefullwidtho

15、ftheblocks(seeFig.22).Ifsuchtoardsarenotavailable,theblocksshou1dbeplacedonsmoothgroundcoveredwithpaperorleavessothattheywillnotbeindirectcontactwiththeground.Theblocksshouldnotbevushedintoanotherpositionafterbeinpplaced.Ifitisnecessarytomovetheblocksatthispointwhentheyareveryweak,Fig.22.-Blockastac

16、kedforfirsttheyshouldbecarefulIy1iftedandS-daycure,carefullyplacedagain.Iftheblockscannotbeputinsideorunderashelter,coverthemwithheavypaper.(Papercementbagscarefullyopenedandseparatedmakeexcellentcoverings.)Ifthereisashortageofstoragespace,theblockscanbestackedfiverowshighafterthreeorfourhoursofdrying-iftheyareverycarefullyhandled.CornerTauer.(SeeFig.21.)cornertaper(onecornerthinnerthantherest)iscausedbyacombinationofasidetaperandanendtaper(secFig.1.1First,fixthesidetaperbymovingthe