Numerical Study of Rapid Cooling of Injection Molds

Muszyński, Paweł; Poszwa, Przemysław; Brzęk, Paweł

doi:10.1007/978-3-319-99353-9_57

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…As the cooling startup, the heating rod was shut down and the coolant begun to circulate in cooling lines [25]. The cooling temperature field distribution before and after optimizing the power densities of heating rods is shown in fig.…”

Section: Optimization Results and Confirmationmentioning

confidence: 99%

Optimization and application of temperature field in rapid heat cycling molding

Hao

2022

THERM SCI

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The rapid thermal cycle molding (RHCM) belongs to the injection mold temperature control system which is helpful to improve mold ability and enhance part quality. Despite many available literatures, RHCM does not represent a well-developed area of practice. The challenge is the uneven distribution of temperature in the cavity after heating, which mostly leads to defects on the surface of the products. In order to obtain uniform cavity surface temperature distribution of RHCM, the power of heating rods of the electric-heating system in an injection mold was optimized by the response surface method(RSM) in this work. The proposed optimization result was applied to design a complex RHCM injection mold with side core-pulling, holes and different thickness of an automotive part to verify its effectiveness by injection molding. Compared with initial design, the mold temperature uniformity was remarkably improvedby79%. Based on the optimization and injection molding numerical simulation results, the workable molding process to weaken the weld-lines effects on the quality was suggested and the practical injection molded parts were well produced.

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Section: Optimization Results and Confirmationmentioning

confidence: 99%

Optimization and application of temperature field in rapid heat cycling molding

Hao

2022

THERM SCI

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“…However, these manufacturing techniques limit the channel design to round profiles in straight lines [ 33 ], limiting the number and placement of channels inside the mold cavity [ 34 , 35 ]. Consequently, heat transfer through the mold is not homogeneous, resulting in different shrinkage that drives to warpage and increased cooling time [ 33 ] due to the heat transfer’s influence on the kinetics, crystallinity degree, and microstructure of polymers [ 36 ].…”

Section: Heat Transfer During Injection Moldingmentioning

confidence: 99%

Modification of the Cavity of Plastic Injection Molds: A Brief Review of Materials and Influence on the Cooling Rates

Carrupt

Piedade

2021

Materials

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In the 21st century, a great percentage of the plastic industry production is associated with both injection molding and extrusion processes. Manufactured plastic components/parts are used in several industry sectors, where the automotive and aeronautic stand out. In the injection process cycle, the cooling step represents 60% to 80% of the total injection process time, and it is used to estimate the production capabilities and costs. Therefore, efforts have been focused on obtaining more efficient cooling systems, seeking the best relationship between the shape, the quantity, and the distribution of the cooling channels into the injection molds. Concomitantly, the surface coating of the mold cavity also assumes great importance as it can provide increased hardness and a more straightforward demolding process. These aspects contribute to the decrease of rejected parts due to surface defects. However, the effect of the coated cavity on the heat transfer and, consequently, on the time of the injection cycle is not often addressed. This paper reviews the effects of the materials and surface coatings of molds cavity on the filling and cooling of the injection molding cycle. It shows how the design of cooling channels affects the cooling rates and warpage for molded parts. It also addresses how the surface coating influence the mold filling patterns and mold cooling. This review shows, more specifically, the influence of the coating process on the cooling step of the injection cycle and, consequently, in the productivity of the process.

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An experimental analysis on thermal performance of interloping threaded cooling channels in injection mold cavity

Paraye,

Sarviya

2024

Iran Polym J

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Numerical Study of Rapid Cooling of Injection Molds

Cited by 3 publications

References 11 publications

Optimization and application of temperature field in rapid heat cycling molding

Optimization and application of temperature field in rapid heat cycling molding

Modification of the Cavity of Plastic Injection Molds: A Brief Review of Materials and Influence on the Cooling Rates

An experimental analysis on thermal performance of interloping threaded cooling channels in injection mold cavity

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