Studies on Application of Hydraulic Neutron of Injection Molding Machine in Two-Step Demoulding of Large Mould

Abstract:

This article describes a method through which one can parallel oil pipelines of two hydraulic neutrons of an injection molding machine to form a new hydraulic neutron, and connect its inlet and return ports with the ejection stripper cylinder of a mould. The basic principle is that the oil circuit in the size of the flow is mainly achieved by regulating the flow area of valve port. The actuator velocity can be adjusted by the size of the flow. In other words, single tubing orifice flow area is increased with two oil circuit parallel connection. Then flow through the tubing corresponding is increased, and the pushing cylinder velocity can also be increased. Setting the starting time of solenoid valve pipelines of two hydraulic neutrons, one can have the ejection controlled by the two-step speed. Through the production application of mould of twin-tub of double-barrel washing machine, the washing machine is ejected from the side of the fixed mold. Pressing barrel mouth flanged by the pushing plate of the fixed mold can easily leading to product damage. Mold opening speed is slow. Once the product is ejected, the speed of opening mold can be faster. The speed of push rod to return can also be increased. Under normal circumstances, a group of top of the body neutron oil circuit is used. When the products leave the mold, the mold opening speed still cannot be increased and the speed of the push rod return cannot be increased either. After two sets of hydraulic neutron oil circuits were applied to the mold of twin-tub of double-barrel washing machine, the opening mold ejection time decreased by 8 seconds, with the molding cycle shortened by 7.4%. The author offers a simple way to achieve production efficiency, without increasing the hydraulic valve and leading to extra cost. It is a reference method to improve the speed of the injection molding machine.

• Periodical: Applied Mechanics and Materials (Volumes 201-202)
• Pages: 462-464
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.201-202.462
• Online since: October 2012
• Authors: Zheng Cai Wang, Jing Wang, Guo Fu Li
• Keywords: Double-Barrel Washing Machine, Hydraulic Neutron, Injection Molding Machine, Mould, Twin-Tub

References

[1] J.N. Wang: China Science and Technology Information, (2011) No. 9, pp.156-158(in Chinese).

[2] Y.G. Zhang: Modern Plastics Processing and Applications, (2010) No. 5, pp.55-59(in Chinese).

[3] C.L. Xu, L. Chun and Y.F. Han: Machinery Design and Manufacture, (2010) No. 1, pp.59-60(in Chinese).

[4] K. Qu: Hydraulic and pneumatic drive (Mechanic industry Press, China 2009).

[5] Z.W. Li and G.X. Zhu: Injection molding machine electrical and electronic circuits(Chemical Industry Press, China 2005).

[6] X.T. Wang: Injection technology and injection molding machine(Chemical Industry Press, China 2005).