Gates positions

Moving the gate position more rapidly than this results in a loss of resolution and smooths the output so that it reflects the time constant of the integrator rather than the input waveform. Use of slower scan speeds simply lengthens experiment time and provides no useful increase in either resolution or SNIR. 

Fig. 2. Representative HUVEC transfection efficacy of C32 and method for FACS gating. The one-dimensional histogram of C32/DNA transfected cells (56.5% positive) (left) includes some falsely positive cells that are excluded during the two-dimensional analysis of the same data set as shown by the FACS density plot gating for the negative control (0% positive) (middle) and the C32/DNA transfection (44.7% positive) (right). Ratio of GFP fluorescence (x-axis) to background fluorescence (y-axis) is used to accurately gate positive cells.

Sprue gate system, sprue gate position. 

Mechanical torques of the prime movers, steam or hydrauhc, for large generators depend on rotor speed. In unregulated machines the torque speed characteristic is linear over the rated range of speeds. The prime mover speed of a machine will drop in response to an increased load, and the valve position must be opened to increase the speed of the machine. In a regulated machine (governor controlled) the speed control mechanism controls the throttle valves to the steam turbine or the gate position for a water turbine. 

Since the formation of the nanotube network is strongly related to the flow of the melt, the electrical conductivity of injection molded parts can exhibit local variations [46]. Thus, next to the choice of the injection molding parameters, the electrical properties depend on the design parameters of the mold as gate position and shape, for instance. Such kind of investigations and the development of corresponding models are the topic of actual research activities. Some first results can be found in [67]. 

Jetting Part deformed by turbulent flow of material Poor tool design, gate position or runner, injection speed set too high, poor gate design causing small die swell in part... 

Shrinkage and its dependence on process parameters, on the gate position and on the direction of measuring,... 

FIGURE 1.37 Tunnel gate positioned in the ejector half of the mold... 

The used PUR systems in the closed-mold filling method have a shorter cure time, which can lead to a shorter cycle time. Therefore, the number of required molds can be reduced. However, after having finished the mold, changing the runner and gate position to produce perfect parts is very expensive. 

The use of the hot runner technology allows only certain component geometries and mold concepts. With hot runner systems, gating positions are achieved that cannot be reached conventionally the active movement or complete avoidance of fill lines can be implemented by sequential injection multi-component injection molding can be performed with up to five materials in a mold high-speed stack molds can be built film and fabric can be back injected gas and water injection technology can be implemented multi-cavity molds can be realized clean room production can be optimized and the co-injection technique can be enabled. 

FIGURE 2.59 Mini-hot runner system with 1 6 gate positions... 

Effect of gate position on the distribution of core material using various mouid geometries... 

When selecting the gating position, ensure that there is a continuous flow of material at all points of the flow path with no stagnation at sharp corners avoid regions of compression and decompression and keep the flow path very streamlined. 

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