ICAR Technical Series no. 7 - Nitra Proc.

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Pulling force and teat penetration55p u llin g fo rce = 3 0 N50pss [kPa]454035pss(100mm) = -0,0073*Qm 2 - 0,5299*Qm + 50,893R 2 = 0, 99 14Qm [kg/min]0 2 4 6 8Figure 2. Influence of liquid rate on the average vacuum level during the milkingphase, pss.dp1max1 [kPa]0,10,050-0,05 30 40 50 60 70 80-0,1-0,15-0,2-0,25 teat penetration: 50 mm 62 mm-0,375 mm 100 mm-0,35F [N]dp1max1(50mm)= 0,0004*Qm 2 - 0,0383*Qm + 0,8059 R 2 = 0,5897dp1max1(62mm) = 0,0004*Qm 2 - 0,0429*Qm + 0,976 R 2 = 0,4286dp1max1(75mm) = 0,0003*Qm 2 - 0,0352*Qm + 0,7925 R 2 = 0,603dp1max1(100mm) = 5E -05*Qm 2 - 0,0072*Qm + 0,1234 R 2 = 0,1644Figure 3. Influence of pulling force in the liner and teat penetration on the pressuredifference between the end of teat and claw (dp1max1) and average vacuum decreaseduring a complete pulsation cycle (dp) for liquid Qm=8kg/min.282Conference on "Physiological and technicalaspects of machine milking"
Szlachta & Aleksanderpressure difference between the end of teat and claw (dp1max1) wereobtained with pulling force ranging from 40 to 70 N. The dp1ma1 hadnegative value for whole range of pulling force (30-80N).The best value of parameter pss and dp1max1 was observed for pullingforce in the liner ranging from 40 to 70N. This range of pulling force is alsosuitable for dp1max1, which oscillates between -0,1 and -0,2 kPa. Theresearch showed that the Harmony liner causes back flow in small degree.ConclusionHamann J., Dück M., 1984; Modyfikationen von Melksystemen undMastitisprävention. Milchw. 39. 12.Hamann J.,1989; Maschineller Milchentzug und mastitis. Stuttgard,26-45ReferencesMayntz M., Laidig De Toro., 1990; Preliminary results concerningthe local stimulation efficiency of linerless milking. Milchwissenschaft,45, 10-14.O’Shea J., E. O‘Callaghan., Meaney W.J., Crowley C. 1976; Effectof combinations of large and small irregular and cyclic vacuum fluctuationsin the milking machine on the rate of new infection in dairy cows. Ir. J.Agric.res. 15, 377-399.Szlachta J; 1997, Uwarunkowania zmierzajace do zwiekszeniaprodukcji i poprawy jakosci mleka w Polsce. Ref. Na Miedz. Konf.IBMER-Warszawa, 7-15.Szlachta J., 2000; Modelling of the effects of vacuum parameters onreturn flow a short milk tube of the milking unit. Inzynieria Rolnicza 2,165-173.Wiercioch M,. Szlachta J., 1994; Komputerowy system wyznaczaniai pomiaru parametrów doju mechanicznego w warunkach laboratoryjnych.Zesz. Probl. Post. Nauk Rol. 416; 57-67.Williams D.M., Mein G.A., 1980; Efects of pulsation failure on thebovine teat canal. Proc. Int. Wkp. Mach. Milk. And Mastitis. Fermony,Ireland, . p. 73-81.Williams D.M., Mein G.A.., Brown M.R., 1981; Biological responsesof the bovine teat to milking; Information from measurements of milkflowrate withing single pulsation cycles. J. Dairy Sci. 48, 251.ICAR Technical Series - No 7283
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The designationsemployed and thepre
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The organisers of the meeting want
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Milking variables in relation to te
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Modelling of liner behaviour using
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ForewordThe second half of the part
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Rosatiorganizations. The “Lactati
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Rosatito guarantee correctness of s
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RosatiICAR also sponsors books belo
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Technical developments in Slovak co
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de Koning & HuijsmanThe Dutch Quali
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de Koning & Huijsmanare Medicines,
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de Koning & HuijsmanThe pulsation c
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de Koning & HuijsmanBalances which
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Tancin et al.Physiology of milk let
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Tancin et al.In the dairy practice
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Tancin et al.Mayer, H., D. Schams,
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Effect of machine milking on teatIn
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Effect of machine milking on teatBe
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Effect of machine milking on teatTa
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Effect of machine milking on teatNe
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Measurements of vacuum stabilityInt
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Measurements of vacuum stabilityTab
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Measurements of vacuum stabilityFor
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Marnet et al.Comparative study of p
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Marnet et al.production during the
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Marnet et al.prestimulation by the
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Worstorff & BilgeryEffects of liner
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Worstorff & BilgeryTable 1 summaris
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Worstorff & Bilgeryseries 40/32 kPa
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Differential staining of somatic ce
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Different diagnostic measures for m
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Evaluation of milking routine by La
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Evaluation of milking routine by La
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Fryc et al.The assessment parameter
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Fryc et al.p n[kPa]p n1p n2p npt st
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Fryc et al.rate. There were three s
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Milking devices disturbance on SCCm
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Milking devices disturbance on SCCL
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Milking devices disturbance on SCCT
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Turki & WinnickiMilking variables i
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Table1. Milk flow time from in indi
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Table 2. First minute milk flow, av
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Turki & WinnickiMayer H., Schams D.
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Milk recording in GermanyTable 1. E
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Milk recording in GermanyTable 3. A
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Milk recording in GermanyTable 5. M
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Main fields ofactivities of theGerm
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Influence of duration of a and c ph
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Nosal & BilgeryVibrations and vacuu
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Nosal & BilgerykPa45.645.445.245.04
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Nosal & BilgeryIn case of problems
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Testing of vacuum during milkingEva
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Testing of vacuum during milkingthe
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Ryšánek et al.Vacuum fluctuation
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Ryšánek et al.Teat injuries were
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Ryšánek et al.Particular attentio
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de KoningAutomatic milking:Chances
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de Koningfor some time after the mi
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de KoningMilk quality is without do
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de Koningwhen the bulk tank is empt
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de KoningLand, A. van ‘t et al, 2
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Characterising the farms equipped w
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Designing optimal robotic milking b
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ArtmannThe effects of automatic mil
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ArtmannData was collected on the ma
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ArtmannThe differences of the co-ef
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BarthEvaluation of somatic cell cou
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BarthTable 1. Determined and real m
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Barthyield is often a side effect o
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Milking parameters in modified milk
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Pallas & WendtThe development of ud
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Pallas & WendtSCC (x 1,000) / ml250
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Pallas & WendtTrilk, J. und Münch,
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Udder health and milk low profilesA
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Udder health and milk low profilesD
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AMS in Czech RepublicThis farm size
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AMS in Czech RepublicTable 1. Effec
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AMS in Czech RepublicFigure 1. Stab
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BruckmaierSpecific aspects of milk
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Bruckmaiertowards the end of lactat
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BruckmaierBruckmaier, R.M., D. Scha
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Teat callosity and mastitisResultsT
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de Koning et al.Milking characteris
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de Koning et al.Table 1. Statistica
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Influence of ageing on linersThe re
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Neijenhuis & HogeveenMilking interv
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Knízková et al.Effect of old and
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Knízková et al.Thermograms of the
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Knízková et al.Kunc, P., Knízkov
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Postmilking teat disinfectingIntrod
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Postmilking teat disinfectingNDT an
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Los & MaškováTeatcup hardness aft
Page 211 and 212: Los & MaškováIt follows from the
Page 213 and 214: Trends in milking equipmentThe fina
Page 215 and 216: Olechnowicz & TurkiMilking and milk
Page 217 and 218: Table 2. Milk components and somati
Page 219 and 220: Lipinski et al.Effect of some selec
Page 221 and 222: Lipinski et al.Milk hygiene quality
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Page 225 and 226: Effect of two milking systems on te
Page 227 and 228: Effect of two milking systems on te
Page 229 and 230: Milk quality and mastitis monitorin
Page 231 and 232: Nitra in ICAR interlaboratory studi
Page 233 and 234: Botto et al.Effect of ultrasound in
Page 235 and 236: Báder et al.Change of udder confor
Page 237 and 238: Báder et al.6050%4030201.scor.2.sc
Page 239 and 240: Luger et al.Effect of inclination a
Page 241 and 242: Luger et al.There is no difference
Page 243 and 244: Harty et al.Modelling of liner beha
Page 245 and 246: Harty et al.A solid plane was const
Page 247 and 248: Provolo & SangiorgiUsing daily data
Page 249 and 250: Provolo & SangiorgiFigure 3. Averag
Page 251 and 252: Provolo & SangiorgiFigure 7. Cow no
Page 253 and 254: Provolo & Sangiorgistandardisation
Page 255 and 256: Cognome/iInhibition of oxytocin rel
Page 257 and 258: Tancin et al.Milk flow patterns: in
Page 259 and 260: Szlachta & AleksanderThe influence
Page 261: Szlachta & Aleksanderforces in the
Page 265 and 266: List of participantsŠtefan BodoSPU
Page 267 and 268: List of participantsMarian GregušI
Page 269 and 270: List of participantsMarija KlopcicD
Page 271 and 272: List of participantsŠtefan MihinaV
Page 273 and 274: List of participantsEduard Pravnans
Page 275 and 276: List of participantsJozef Tonhauser
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ICAR Technical Series no. 7 - Nitra Proc.

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