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LENGTH-TO-DIAMETER RATIO [4 records]

Record 1 2021-10-19

English

Subject field(s)
  • Plastics Manufacturing
DEF

The ratio of the length(L) to the diameter(D) of an extruder screw or barrel.

CONT

First, the ideal core rod or cavity length-to-diameter(L/D) ratio is approximately 10 : 1 or less.

Key term(s)
  • length-to-diametre ratio
  • length/diameter ratio
  • length/diametre ratio
  • L/d ratio

French

Domaine(s)
  • Plasturgie

Spanish

Campo(s) temático(s)
  • Fabricación de plásticos
CONT

Para el caso del flujo en tuberías y tubos, la fricción es proporcional a la carga de velocidad del flujo y a la relación de la longitud al diámetro de la corriente.

Save record 1

Record 2 1997-11-26

English

Subject field(s)
  • Plastics Manufacturing
CONT

The preform mold consists of four major components: preform cavity, injection nozzle, neckring insert, and core rod assembly.

CONT

The core rod assembly... has four functions or features : It forms the interior of the preform. It supports the parison or the bottle during transfer. It is the valve where air enters to expand the parison. The valve is located either in the shoulder area or in the tip, the location being governed by the bottle or core rod length-to-diameter ratio. Wide mouth bottles(that is, core rods with low length-to-diameter ratios) will usually have a shoulder valve. The core rod has a "blow by" groove. This annular groove, located near the seating shank... is needed to seal the parison and prevent excessive air loss during bottle blowing and to eliminate elastic retraction of the parison during the transfer between cavities.

CONT

Even though the parison is exposed to the air, melt strength is not as crucial because of the support provided by the parison core rod.

OBS

See Figure 82.21 in PLMAT, p. 1085.

French

Domaine(s)
  • Plasturgie
CONT

[...] le soufflage s'effectue en général au travers du noyau.

OBS

Voir Figure 31 dans TECHN.

Spanish

Save record 2

Record 3 1996-03-21

English

Subject field(s)
  • Advanced Technology Weapons
  • Electronic Circuits Technology
  • Photoelectricity and Electron Optics
CONT

A bias potential in volts of 20 to 25 times the channel length-to-diameter ratio is applied across the multichannel plate.

French

Domaine(s)
  • Armes de haute technicité
  • Technologie des circuits électroniques
  • Photo-électricité et optique électronique
CONT

Pour refaire le plein d'électrons de la couche d'émission, on applique entre les deux extrémités de la plaque une différence de potentiel égale à 20 ou 25 fois en Volt le rapport longueur/diamètre du canal.

Spanish

Save record 3

Record 4 1996-03-21

English

Subject field(s)
  • Advanced Technology Weapons
  • Electronic Circuits Technology
  • Photoelectricity and Electron Optics
CONT

A bias potentialin volts of 20 to 25 times the channel length-to-diameter ratio is applied across the multichannel plate.

French

Domaine(s)
  • Armes de haute technicité
  • Technologie des circuits électroniques
  • Photo-électricité et optique électronique
CONT

Les ions positifs libérés par la plaque sont accélérés vers la photocathode sous l'effet du champ électrostatique axial entretenu entre ces composants.

Spanish

Save record 4

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