Casting die and casting process of die-casting machine rubber injection head plate

Abstract

The invention discloses a casting die and a casting process of a die-casting machine rubber injection head plate. The casting die comprises a die body, wherein the die body comprises an upper die and a lower die; at least two cavities which correspond to the rubber injection head plate are formed between the upper die and the lower die; a gate sprue is formed in the upper die, and is communicated with two sides of the cavities through cross gates; two ends of each cross gate are respectively communicated with the bottoms of two sides of the cavities through the ingates; and exhaust holes are also formed in the upper ends of the cavities. The ingates are communicated with the side surfaces of the cavities, and the walls corresponding to the ingates are not thick, so that cooling balance is formed, and the simultaneous solidification effect is reached. Through utilization of an instantaneous flow inoculation process, the matrix structure is refined; the compactness is improved; and the shrinkage rate is reduced. Due to the adoption of the improved process, the defect of shrinkage of shrinkage cavities is basically removed; the oil leakage rate after installation is only 1%-1.5%; the yield is greatly improved; and obvious economic benefits are obtained.

Description

technical field [0001] The invention relates to a casting mold and a casting process for a plastic injection head plate of a die-casting machine. Background technique [0002] Injection head plate (such as Figure 1 to Figure 3 ) is the key core component of the die-casting machine, which belongs to the high wear-resistant and sealing parts of the hydraulic brake. Regular (uneven thickness), in actual production, shrinkage cavity shrinkage occurs at 2 / 3 of the through hole (such as Figure 4 ), oil leakage occurred to varying degrees after installation or leaked during a certain period of machine operation, resulting in scrapped castings, and the process yield was only 68%, and many improvements failed to achieve the desired effect. [0003] The casting mold of the injection head plate is as Figure 5 , Figure 6 As shown, the molten iron enters the cavity from the front of the cavity, the pouring process of the casting does not meet the structural requirements of the cas...

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Problems solved by technology

[0002] Injection head plate (such as Figure 1 to Figure 3 ) is the key core component of the die-casting machine, which belongs to the high wear-resistant and sealing part of the hydraulic brake. Regular (uneven thickness), in actual production, shrinkage cavity shrinkage occurs at 2 / 3 of the through hole (such as Figure 4 ), oil leakage occurred to varying degrees after the machine was installed or leaked during a certain period of machine operation, causing the casting to be scrapped, and the process yield was only 68%, and many improvements did not achieve the desired effect

[0003] The casting mold of the injection head plate is as Figure 5 , Image 6 As shown, the molten iron enters the cavity from the front of the cavity, the pouring process of the casting does not meet the structural requirements of the casting, the wall thickness of the corresponding surface of the inner runner is large, and the cooling rate is slow, which is the main cause of shrinkage and shrinkage.

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