Spheroidal graphite cast iron for head plate of injection molding machine and head plate of injection molding machine

Abstract

The invention provides a spheroidal graphite cast iron for a head plate of an injection molding machine. The spheroidal graphite cast iron for the head plate of the injection molding machine is prepared from the following components in percentages by mass: 3.6-3.8% of C, 2.2-2.4% of Si, 0.55-0.7% of Mn, 0.03-0.055% of Mg, 0.01-0.04% of P, 0.015-0.035% of Cu and the balance of Fe. The spheroidal graphite cast iron for the head plate of the injection molding machine provided by the invention comprises carbon (C), silicon (Si), manganese (Mn), magnesium (Mg), phosphorus (P) and copper (Cu), wherein Mn and Cu are properly added, so that the product hardness is improved; by matching with a standardized box-opening insulating time, a casting reaches ideal wear resistance, shock resistance and excellent machinability, the product strength is optimized, the production cost is lowered, and the spheroidal graphite cast iron is particularly suitable for casting the head plate of the injection molding machine. The invention also provides the head plate of the injection molding machine prepared from the spheroidal graphite cast iron.

Description

technical field [0001] The invention relates to the technical field of injection molding machine casting, in particular to a nodular cast iron for an injection molding machine head plate and an injection molding machine head plate. Background technique [0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding molds. Divided into vertical, horizontal, all-electric. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and makes it shoot out to fill the mold cavity. [0003] Modern injection molding machines are developing in the direction of large scale, precision, stability and reliability, and high automation. New technologies, new processes, and new materials are widely used in the design and manufacture of injection molding equipment; among them...

AI Technical Summary

Problems solved by technology

In the prior art, the general material grade of the injection molding machine head plate is ductile iron QT500-7, and the QT500-7 nodular cast iron is ferritic ductile iron with medium strength. As an important part of the injection molding machine, the injection molding machine head plate has strict requirements on mechanical properties. It requires better strength, good rigidity, and is not easily deformed by impact. Moreover, since the head plate of the injection molding machine is a large casting, the hardness of the product cast by the general alloy formula often does not reach 160-170HBS, which cannot meet the production demand.