|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 31 van 120 gevonden artikelen
| Titel: |
37—CAM-TO-NEEDLE IMPACT FORCES IN WEFT-KNITTING PART X: THE CHARACTERISTICS OF LATCH-NEEDLE BREAKAGES |
| Auteur: |
Wray, G. R. Burns, N. D. |
| Verschenen in: |
The journal of the Textile Institute |
| Paginering: | Jaargang 69 (1978) nr. 10 pagina's 309-314 |
| Jaar: |
1978-10-01 |
| Inhoud: |
The characteristics of the common causes of needle fracture at the hook and at the butt are examined, and it is shown that the fracture rate depends on the thickness of the needle material at the hook-bend and on the tightness of the needle in the trick. Experiments in which the impact-measuring transducers developed in earlier parts of this series were used showed that the incidence of hook failure was directly related to the magnitude of the guard-cam impact. Tightly held needles usually result in failure as a result of stitch-cam impacts. A less common type of needle breakage, at a point near the latch pivot, was also investigated. Various specially shaped needles were designed and tested in an attempt to reduce failure rates; these can help to reduce the incidence of fractures in the needle-head region, probably owing to a reduction in the amplitudes of the stress waves transmitted up the needle shank by the retarding effects of wedge-shaped cut-outs in the needle stem, but this improvement is accompanied by completely new types of breakage arising from stress concentrations caused by sudden changes of cross-sectional area. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 31 van 120 gevonden artikelen
| << vorige | volgende >> |