Comparison of injection molding machine performance

Kelly, Adrian L.; Woodhead, Mike; Coates, Phil

doi:10.1002/pen.20335

Cited by 21 publications

(16 citation statements)

References 6 publications

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“…Electric machines use servomotors to drive processes, such as injection, clamping and plasticating. The main advantages of electric machines versus hydraulic machines are higher precision, clean environment without hydraulic oil, etc., low noise-level and energy efficiency Strassner 2004;Wang et al 2005;Kelly et al 2005). A comparison between a number of injection moulding machines was reported in the literature.…”

Section: Handling and Inspectionmentioning

confidence: 95%

“…In addition, it was shown that hydraulic machines consume more power that electric machines by a factor of 3.6. On the other hand, electric machines are more expensive relative to hydraulic machines (Strassner 2004;Kelly et al 2005).…”

Section: Handling and Inspectionmentioning

confidence: 98%

“…A comparison between a number of injection moulding machines was reported in the literature. Four machines, two of which were electric, were compared in terms of performance factors, including process variation and energy consumption (Kelly et al 2005). It was shown that electric machines are more reliable, in that they exhibit less variation over a number of process measurements, which was reflected in better repeatability.…”

Section: Handling and Inspectionmentioning

confidence: 99%

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Micro-injection moulding of polymer microfluidic devices

Attia

Marson

Alcock

2009

Microfluid Nanofluid

415

268

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Microfluidic devices have several applications in different fields, such as chemistry, medicine and biotechnology. Many research activities are currently investigating the manufacturing of integrated microfluidic devices on a mass-production scale with relatively low costs. This is especially important for applications where disposable devices are used for medical analysis. Micromoulding of thermoplastic polymers is a developing process with great potential for producing low-cost microfluidic devices. Among different micromoulding techniques, micro-injection moulding is one of the most promising processes suitable for manufacturing polymeric disposable microfluidic devices. This review paper aims at presenting the main significant developments that have been achieved in different aspects of micro-injection moulding of microfluidic devices. Aspects covered include device design, machine capabilities, mould manufacturing, material selection and process parameters. Problems, challenges and potential areas for research are highlighted.

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Section: Handling and Inspectionmentioning

confidence: 95%

Section: Handling and Inspectionmentioning

confidence: 98%

Section: Handling and Inspectionmentioning

confidence: 99%

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Micro-injection moulding of polymer microfluidic devices

Attia

Marson

Alcock

2009

Microfluid Nanofluid

415

268

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“…With the development of auxiliary control systems and the potential integration of external signals into machine controllers, mold cavity pressure sensors were developed and used for switchover control [12]. The incorporation of different switchover methods and their use in quality control systems is now considered as an important measure of machine performance as reported by Kelly et al [13]. The proliferation of auxiliary control systems has enabled the use of other sensors for switchover control as well, including the use of tie-bar strain gauges [14], inmold displacement transducers [15], and mold cavity temperature sensors [16].…”

Section: Related Workmentioning

confidence: 99%

A comparison of seven filling to packing switchover methods for injection molding

Kazmer

Velusamy

Westerdale

et al. 2010

Polymer Engineering & Sci

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The effectiveness of seven methods for controlling switchover from the filling to packing stage were investigated, including: (1) screw position, (2) injection time, (3) machine pressure, (4) nozzle pressure, (5) runner pressure near the sprue, (6) cavity pressure near the gate, and (7) cavity temperature at the end of flow. The activation threshold for each of the seven switchover methods was iteratively determined so as to produce similar part weights relative to a standard process. A design of experiments was implemented for each of the seven switchover methods that perturbs the process settings by an amount equal to six standard deviations of the standard process so as to replicate the expected long‐term process variation. The results suggest that conventional switchover methods (e.g., screw position) had lower short‐term variation, but other methods were more robust with respect to rejecting long‐term process variation. The merits of different dimensional measurements for quality control are also discussed relative to the society of the plastics industry (SPI) standard tolerances. POLYM. ENG. SCI., 50:2031–2043, 2010. © 2010 Society of Plastics Engineers

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“…W grupie maszyn z napêdem hydraulicznym powsta³y wtryskarki w uk³adzie dwup³ytowym, z wysuwanymi kolumnami prowadz¹cymi oraz prowadnicowe (bezkolumnowe). W celu zwiêkszenia szyb-kobie¿nooeci oraz zmniejszenia zu¿ycia oleju zastosowano we wtryskarkach hydraulicznych pompy o zmiennej *) Artyku³ przedstawia treoeae wyst¹pienia wyg³oszonego w ramach XI Profesorskich Warsztatów Naukowych "Przetwórstwo tworzyw polimerowych", Pieczyska k. Bydgoszczy, 11-14 czerwca 2006 r. wydajnooeci, a tak¿e wykorzystano uk³ady wielosi³ownikowe z ma³ymi si³ownikami o niewielkim wydatku oleju [7,8].…”

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All-electric injection molding machines

Jachowicz

2007

Polimery

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Streszczenie -Przedstawiono podstawowe zagadnienia dotycz¹ce budowy wspó³czesnych wtryskarek z napêdem ca³kowicie elektrycznym. Scharakteryzowano nowoczesne rozwi¹zania konstrukcyjne uk³adów narzêdziowych i uk³adów uplastyczniaj¹cych w tego rodzaju wtryskarkach. Omówiono przy tym budowê uk³adów narzêdziowych o konstrukcji dwup³ytowej i trójp³ytowej oraz rozwi¹zania konstrukcyjne z kolumnami i bezkolumnowe, a tak¿e zmiany w budowie napêdu uk³adu uplastyczniaj¹cego. Scharakteryzowano wp³yw napêdu elektrycznego na parametry u¿ytkowe wtryskarki oraz uwypuklono zalety i wady zastosowania tego nowego napêdu we wtryskarkach oelimakowych. S³owa kluczowe: wtryskarka, napêd elektryczny, uk³ad uplastyczniaj¹cy, uk³ad narzêdziowy, konstrukcja, wydajnooeae procesu. ALL-ELECTRIC INJECTION MOLDING MACHINESSummary -General problems concerning the structure of modern all-electric injection molding machines were presented. Advanced engineering designs of the clamping systems ( Fig. 1-10) and plasticizing systems (Fig. 11-13) in the discussed injection molding machines have been characterized. The constructions of two-plate and three-plate clamping units as well as constructional solutions with tie-bars or tie-bar-less ones, and the changes in plasticizing unit drive were discussed. An influence of electric drive on the functional properties of injection molding machine has been characterized. Advantages and disadvantages of application of electric drive in he worm injection molding machines were stressed (Fig. 14).

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Comparison of injection molding machine performance

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Cited by 21 publications

References 6 publications

Micro-injection moulding of polymer microfluidic devices

Micro-injection moulding of polymer microfluidic devices

A comparison of seven filling to packing switchover methods for injection molding

All-electric injection molding machines

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