Evaluation of heat management in injection mould tools

McCalla, B. A.; Allan, Peter; Hornsby, Peter

doi:10.1179/174328907x174593

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Similar to conventional pulsed cooling method in injection molding process,6–8 the aim of mold temperature control in RHCM is also to achieve a rapid, variable, and accurate cavity surface temperature control. By doing this, the part quality, especially surface appearance, can be improved with little effect on molding cycle time.…”

Section: Introductionmentioning

confidence: 99%

Research on optimum heating system design for rapid thermal response mold with electric heating based on response surface methodology and particle swarm optimization

Wang

Zhao

Guan

2010

J of Applied Polymer Sci

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A new electric-heating rapid thermal response (RTR) mold with floating cavity/core for rapid heat cycle molding is investigated in this study. Process principles of Rapid heat cycle molding (RHCM) with such new electric-heating mold are discussed and presented. Response surface methodology (RSM) is employed to develop mathematical relationships between layout of the heating elements and heating efficiency, temperature uniformity and structural strength of the floating cavity. Three explanatory variables including half distance between two adjacent heating rods, spacing between heating rods and cavity surface, and the diameter of the heating rod are used to describe the layout and scale of the heating elements. The response variables involving required heating time, maximum cavity surface temperature, and maximum von-Mises stress are used to characterize heating efficiency, temperature uniformity, and structural strength of the floating cavity, respectively. Central composite design (CCD) method is used for factorial experiments. Finite element analyses are conducted for combination of explanatory parameters to acquire the corresponding values of the response variables. Three predictive models for the response variables are created by regression analysis. Analysis of variance (ANOVA) is used to check their accuracy. These response surface models are interfaced with an effective particle swarm algorithm for the optimum heating system design of the electric-heating RTR mold. The developed optimum method is then used for the design of the floating electricheating cavity for an actual industrial product. The following heat transfer analysis results show that the temperature distribution uniformity of the cavity surface is greatly improved with the optimal cavity structure and layout of heating rods.

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Section: Introductionmentioning

confidence: 99%

Research on optimum heating system design for rapid thermal response mold with electric heating based on response surface methodology and particle swarm optimization

Wang

Zhao

Guan

2010

J of Applied Polymer Sci

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“…Coolant temperatures were assigned, taking into consideration the recommendations of the material supplier, in order that the required tool running temperature was achieved in each zone of the tool during operation [1,2]. A problem with this arrangement is that, if the cycle is interrupted, due to machine fault or change in operations, then the mould tool temperature may fall below the tool running temperature.…”

Section: Introductionmentioning

confidence: 99%

A computational model for the cooling phase of injection moulding

Smith

Wrobel

McCalla

et al. 2008

Journal of Materials Processing Technology

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This paper discusses the approaches and techniques used to build a realistic numerical model to analyse the cooling phase of the injection moulding process. The procedures employed to select an appropriate mesh and the boundary and initial conditions for the problem are discussed and justified. The final model is validated using direct comparisons with experimental results generated in an earlier study. The model is shown to be a useful tool for further studies aimed at optimising the cooling phase of the injection moulding process. Using the numerical model provides additional information relating to changes in conditions throughout the process, which otherwise could not be deduced or assessed experimentally. These results, and other benefits related to the use of the model, are also discussed in the paper.

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Rapid thermal cycling with low thermal inertia tools

Xu¹,

Sachs²

2008

Polymer Engineering & Sci

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Solid freeform fabrication processes offer the manufacturing flexibility for tools with low thermal inertia and internal conformal channels for rapid thermal cycling in injection molding. This article analyzed each step of a rapid thermal cycling process and provided quantitative guidance for tooling design. The proposed design methodology was tested on a three‐dimensional (3D) printed benchmark tool with truss support. Rapid cooling test on the benchmark tool resulted in the mold time constant shorter than 2.3 s and the cavity temperature uniformity better than 3°C. Preliminary tests demonstrated the technical feasibility of using a solid freeform fabrication process to fabricate low thermal inertia tools for improved heat management in injection molding. POLYM. ENG. SCI., 2009. © 2008 Society of Plastics Engineers

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Evaluation of heat management in injection mould tools

Cited by 4 publications

References 4 publications

Research on optimum heating system design for rapid thermal response mold with electric heating based on response surface methodology and particle swarm optimization

Research on optimum heating system design for rapid thermal response mold with electric heating based on response surface methodology and particle swarm optimization

A computational model for the cooling phase of injection moulding

Rapid thermal cycling with low thermal inertia tools

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