Topic
Process variable
About: Process variable is a research topic. Over the lifetime, 3983 publications have been published within this topic receiving 43130 citations. The topic is also known as: process parameter.
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TL;DR: In this paper, the effect of the process parameters on the cooling of the polymer during injection molding was carried out, and the results indicated that the filling time has a great effect on the solidification of the product during the filling stage.
Abstract: Plastic injection molding (PIM) is well known as a manufacturing process to produce products with various shapes and complex geometry at low cost. Determining optimal settings of process parameters critically influence productivity, quality, and cost of production in the PIM industry. To study the effect of the process parameters on the cooling of the polymer during injection molding, a full three-dimensional time-dependent injection molding analysis was carried out. The studied configuration consists of a mold having cuboids-shaped cavity with two different thicknesses and six cooling channels. A numerical model by finite volume was used for the solution of the physical model. A validation of the numerical model was presented. The effect of different process parameters (inlet coolant temperature, inlet coolant flow rate, injection temperature, and filling time) on the cooling process was considered. The results indicate that the filling time has a great effect on the solidification of the product during the filling stage. They also show that low coolant flow rate increases the heterogeneity of the temperature distribution through the product. The process parameter realizing minimum cooling time not necessary achieves optimum product quality and the complete filling of the cavity by the polymer material. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
13 citations
TL;DR: In this article, the authors measured the transient tool-chip interface temperature of a rotating tool with embedded thermocouples, which can be used to monitor and control an important process variable for smart manufacturing applications.
13 citations
TL;DR: Two different object values of winding products, including mechanical performance (tensile strength) and a physical property (void content), were respectively calculated and an integrated methodology by combining multi-parameter relative sensitivity analysis and single-parameters sensitivity analysis was presented to obtain the optimal intervals of the composite tape winding process.
Abstract: The composite tape winding process, which utilizes a tape winding machine and prepreg tapes, provides a promising way to improve the quality of composite products. Nevertheless, the process parameters of composite tape winding have crucial effects on the tensile strength and void content, which are closely related to the performances of the winding products. In this article, two different object values of winding products, including mechanical performance (tensile strength) and a physical property (void content), were respectively calculated. Thereafter, the paper presents an integrated methodology by combining multi-parameter relative sensitivity analysis and single-parameter sensitivity analysis to obtain the optimal intervals of the composite tape winding process. First, the global multi-parameter sensitivity analysis method was applied to investigate the sensitivity of each parameter in the tape winding processing. Then, the local single-parameter sensitivity analysis method was employed to calculate the sensitivity of a single parameter within the corresponding range. Finally, the stability and instability ranges of each parameter were distinguished. Meanwhile, the authors optimized the process parameter ranges and provided comprehensive optimized intervals of the winding parameters. The verification test validated that the optimized intervals of the process parameters were reliable and stable for winding products manufacturing.
13 citations
Patent•
02 Sep 2010
TL;DR: In this article, the authors present a method and apparatus for controlling a coating deposition process, where at least at one stage of the deposition process at least one of the coating precursors comprises a gas, a vapour or an aerosol.
Abstract: Method and apparatus for controlling a coating deposition process, where at least at one stage of the coating deposition process at least one of the coating precursors comprises a gas, a vapour or an aerosol. The method comprises monitoring ultrafine particles and adjusting at least one process parameter based on the monitoring. The apparatus comprises means (13) for monitoring ultrafine particles and means (14) for adjusting at least one process parameter based on the monitoring.
13 citations
Patent•
22 Sep 2000TL;DR: In this paper, a process variable is measured using an orthogonal polynomial of the output of a sensor and a microprocessor coupled to the sensor output, and a transmitter output is configured to provide an output related to the process variable.
Abstract: A transmitter (10) for measuring a process variable includes a sensor (102) configured to couple to a process and having a sensor output (120) related to the process variable. A microprocessor (106) coupled to the sensor output (120) provides a process variable output which is a function of an orthogonal-polynomial of the sensor output (120). A transmitter output is configured to provide an output related to the process variable.
13 citations