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Guangdong Hongtai Technology; Holdings Co. | Date: 2013-01-22

Elevators; moving staircases; moving pavements; embossing machines; forging moulds, namely, processing plastic moulds; foundry machines; machine parts, namely, molds for use in the manufacture of automobile parts; cold chamber die casting machines; starters for motors and engines.


Lin H.,Huazhong University of Science and Technology | Wan L.,Huazhong University of Science and Technology | Liu H.-Y.,Guangdong Hongtai Technology Holdings Co. | Zhang Y.-C.,Guangdong Hongtai Technology Holdings Co. | And 4 more authors.
Zhuzao/Foundry | Year: 2011

Based on innovative high vacuum control system, effects of shot parameters including vacuum level, venting time, shot velocity and switch position of fast velocity on casting quality and mechanical properties were investigated for the high vacuum die-cast car chassis part in this paper. The results show that optimal process parameters are as follows: the vacuumed startup and stop position are 110 mm and 700 mm respectively, and the vacuum level of cavity is up to 91 kPa; meanwhile the slow and fast velocity of the injection punch are 0.19 and 5.8 m/s, and switch position of fast velocity is 240 mm. The round car chassis part can be achieved under above parameters, whose tensile strength is 281.56 MPa, yield strength 155.44 MPa and elongation up to 7.34%. The chassis part was successfully employed in a domestic own-brand car. Source


Wan L.,Huazhong University of Science and Technology | Lin H.,Huazhong University of Science and Technology | Liu H.,Guangdong Hongtai Technology Holdings Co. | Chen G.,Guangdong Hongtai Technology Holdings Co. | And 4 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2011

We have developed key techniques including vacuum valve and its control equipment for high vacuum die casting. The running principle of the vacuum valve is that exhausting channel is closed by a level arm driven by liquid pressure in the valve. Vacuum control apparatus uses PLC and touch screen technology to make sure reliable working state of valve. The vacuum die casting technology has been used for producing car chassis part, transmission box and 3G housing, and desirable effects are achieved. Source

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