Development of Heating and Cooling Injection Mold with Far-Infrared Radiation Heater

Yasuhiko Murata; Masahiro Kuramochi

doi:10.20965/ijat.2016.p0079

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IJAT Vol.10 No.1 pp. 79-86

doi: 10.20965/ijat.2016.p0079

(2016)

Paper:

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Development of Heating and Cooling Injection Mold with Far-Infrared Radiation Heater

Yasuhiko Murata and Masahiro Kuramochi

Department of Mechanical Engineering, Nippon Institute of Technology
4-1 Gakuendai, Miyashiro-mach, Minamisaitama-gun, Saitama 345-8501, Japan

Received:

August 10, 2015

Accepted:

November 10, 2015

Online released:

January 4, 2016

Published:

January 5, 2016

Keywords:

polymer, injection molding, heating and cooling injection mold, far-infrared radiation heater, weld line

Abstract

Several rapid heating and cooling molding methods have been developed for practical use to improve the surface quality of plastic injection-molded products. These methods, however, need expensive equipment and complex molds that require vast know-how, and hence cannot be applied easily to actual production. In order to establish a molding method in which the mold’s cavity surfaces can easily be heated, we designed and manufactured a heating and cooling injection mold with a far-infrared radiation heater. Using this mold, we molded a high-impact polystyrene molded product, and found that the use of such a mold could lead to a decrease in the V-shaped groove depth of weld lines, as well as to an improvement in the transcription of the mold’s cavity surface quality onto the molded product. We also carried out tensile tests on the molded products to confirm whether the use of such a mold could increase the product’s elongation at break.

Cite this article as:

Y. Murata and M. Kuramochi, “Development of Heating and Cooling Injection Mold with Far-Infrared Radiation Heater,” Int. J. Automation Technol., Vol.10 No.1, pp. 79-86, 2016.

Data files:

References

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[5] N. Tada, Y. Inoue et al., “Introduction of the Multi Color Molding which Realizes 3D Decoration,” Preprints of Seikei-Kakou Autumnal Meeting 2012, pp. 117-118, 2012.
[6] A. Ebisawa, “Heat and Cool System to Get the Excellent Surface Finishing,” J. of the Japan Society of Polymer Processing, Vol.11, No.5, pp. 397-400, 1999.
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[9] R. Yoshino, “Cavity Surface Quick High Temperaturize Technology with Slender Tube Heater,” J. of the Japan Society of Polymer Processing, Vol.20, No.3, p. 192, 2008.
[10] T. Iwasawa, Y. Fukushima et al., “A Basic Study on Spot Heating Weld-less Manufacturing System – Die Temperature Distribution by CAE Analysis for a Design – ,” Preprints of Seikei-Kakou Annual Meeting 2011, pp. 91-92, 2011.
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[12] R. Nicolas and F. Jose, “How Inductive Heating can Improve Plastic Injection,” J. of the Japan Society of Polymer Processing, Vol.23, No.12, pp. 705-710, 2011.
[13] Y. Murata, K. Kino et al., “Improvement on Injection Molded Products Appearance by Induction Heating Mold,” J of the Japan Society for Precision Engineering, Vol.75, No.3, pp. 407-411, 2009.
[14] Y. Murata, K. Kino et al., “Improvement on Injection Molded Products Appearance by Induction Heating Mold,” Abstracts for 24^nd Annual Meeting of Polymer Processing Society, CD-ROM, File No.S13-1327, 2008.
[15] Y. Murata, M. Koike, and S. Pan “Improving the Properties of Injection Molded Products with Induction Heating and Cooling Molds,” Int. J. of Automation Technology, Vol.9, No.1, pp. 3-9, 2015.
[16] CAP Co., Ltd., Thermo Assisted Molding, http://www.cap-inc. co.jp/cfrtp [accessed on July 21, 2015]
[17] S. Abe, Y. Murata et al., “Measurement of melt Temperature Distribution along the Cavity Thickness Direction by Using Integrated Thermocouple Sensor Part III – Investigation of Temperature Distribution under Several Cavity Conditions –,”J. of the Japan Society of Polymer Processing, Vol.15, No.2, pp. 140-147, 2003.

This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.

[1] [1] Y. Suga, “Technology Trend on CFRP Development,” Preprints of Seikei-Kakou Autumnal Meeting 2011, pp. 167-168, 2011.

[2] [2] Textile and Clothing Division Manufacturing Industries Bureau, “The State of National Projects Related to the Thermoplastics CFRP,” J. of the Japan Society of Polymer Processing, Vol.27, No.3, pp. 78-81, 2015.

[3] [3] Y. Murata et al., “Fundamentals in Production Processing,” Corona Publishing Co. Ltd., p. 125, 2009.

[4] [4] Y. Hara, “Full 3D-Digital Surface Texturing, D3Texture and 3D – Digital Movement,” Proc. of 2014 Conference on Die and Mould Technology, pp. 49-52, 2014.

[5] [5] N. Tada, Y. Inoue et al., “Introduction of the Multi Color Molding which Realizes 3D Decoration,” Preprints of Seikei-Kakou Autumnal Meeting 2012, pp. 117-118, 2012.

[6] [6] A. Ebisawa, “Heat and Cool System to Get the Excellent Surface Finishing,” J. of the Japan Society of Polymer Processing, Vol.11, No.5, pp. 397-400, 1999.

[7] [7] ONO SANGYO Co., Ltd. Rapid Heat Cycle Molding, http:// www.onosg.co.jp/rhcm/index.html [accessed on July 21, 2015]

[8] [8] NADA Innovation, E-Mold, http://www.witswell.co.jp/HTM/emold/ emold.html [accessed on August 23, 2011]

[9] [9] R. Yoshino, “Cavity Surface Quick High Temperaturize Technology with Slender Tube Heater,” J. of the Japan Society of Polymer Processing, Vol.20, No.3, p. 192, 2008.

[10] [10] T. Iwasawa, Y. Fukushima et al., “A Basic Study on Spot Heating Weld-less Manufacturing System – Die Temperature Distribution by CAE Analysis for a Design – ,” Preprints of Seikei-Kakou Annual Meeting 2011, pp. 91-92, 2011.

[11] [11] A. Wada et al., U.K. Patent GB2 081 171A, 1982.

[12] [12] R. Nicolas and F. Jose, “How Inductive Heating can Improve Plastic Injection,” J. of the Japan Society of Polymer Processing, Vol.23, No.12, pp. 705-710, 2011.

[13] [13] Y. Murata, K. Kino et al., “Improvement on Injection Molded Products Appearance by Induction Heating Mold,” J of the Japan Society for Precision Engineering, Vol.75, No.3, pp. 407-411, 2009.

[14] [14] Y. Murata, K. Kino et al., “Improvement on Injection Molded Products Appearance by Induction Heating Mold,” Abstracts for 24^nd Annual Meeting of Polymer Processing Society, CD-ROM, File No.S13-1327, 2008.

[15] [15] Y. Murata, M. Koike, and S. Pan “Improving the Properties of Injection Molded Products with Induction Heating and Cooling Molds,” Int. J. of Automation Technology, Vol.9, No.1, pp. 3-9, 2015.

[16] [16] CAP Co., Ltd., Thermo Assisted Molding, http://www.cap-inc. co.jp/cfrtp [accessed on July 21, 2015]

[17] [17] S. Abe, Y. Murata et al., “Measurement of melt Temperature Distribution along the Cavity Thickness Direction by Using Integrated Thermocouple Sensor Part III – Investigation of Temperature Distribution under Several Cavity Conditions –,”J. of the Japan Society of Polymer Processing, Vol.15, No.2, pp. 140-147, 2003.