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A kind of injection device for die-casting machine

A die-casting machine and barrel technology, applied in the field of material injection devices, can solve the problems of molten metal solution leakage, insufficient injection pressure, unreliable sealing, etc., and achieve the effects of ensuring sealing performance, preventing serious local wear, and preventing leakage.

Active Publication Date: 2017-01-25
SDT SMART DIECASTING TECH (SUZHOU) CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the severe wear of the sealing surface of the existing die-casting machine, the unreliable seal in the injection project, especially the molten metal solution is easy to leak from the seal between the plunger and the barrel during die-casting with pressure. Leakage at the injection site, resulting in insufficient injection pressure or prone to casting defects, and then provide a cold chamber die-casting machine with self-sealing function, the cold chamber die-casting machine can ensure the gap between the plunger and the inner wall of the barrel during the injection process Tight sealing, and as the injection pressure increases, the sealing strength increases, so it has a better sealing effect

Method used

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  • A kind of injection device for die-casting machine
  • A kind of injection device for die-casting machine
  • A kind of injection device for die-casting machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] see Figure 1-4, a injection device used on a die-casting machine, which includes a injection assembly for injecting molten metal, a mold assembly for casting molding and a driving mechanism for providing injection power, and the injection assembly includes Cartridge 10 and a plunger 2 slidingly arranged in the inner cavity of the cartridge 10, the tail end of the plunger 2 is connected with the drive mechanism, and the plunger 2 includes a plunger rod 20 and a plunger head 21. The side wall of the plunger head 21 is provided with a first sealing portion that slides and seals with the inner wall of the cartridge 10. The plunger head 21 has a hollow cavity 22, and the hollow cavity 22 has a The front pressure chamber 100 communicates with the opening, and the first sealing part is located on the thin sheet area 23 with a certain deformability formed between the hollow cavity 22 and the outer wall surface of the plunger head 21 .

[0073] Since the opening of the hollow ...

Embodiment 2

[0086] This embodiment provides an injection device for a die-casting machine, which is a modification based on the first embodiment. The second sealing part 24' in the first embodiment is only to prevent the pressure-free chamber 101 from The molten metal inside flows out of the barrel 10 from the tail of the plunger, so the second sealing portion 24 ′ can be sealed by a common plunger. In order to facilitate the installation of the double-sealed plunger of the present invention into the barrel 10, and to ensure that the plunger has a relatively stable operating state in the barrel 10, on the basis of the first embodiment above, see Figure 5 , Figure 6 , the other end of the plunger rod 20 is provided with a second plunger head 21', the second sealing portion 24' is arranged on the circumferential side of the second plunger head 21', the second column The plug head 21' is structurally symmetrical with the center point of the plunger head 21 relative to the length direction...

Embodiment 3

[0089] This embodiment provides a kind of injection device used on the die-casting machine, see figure 1 , Figure 7 , on the basis of the first or second embodiment above, the barrel 10 includes a straight portion 108, and a gooseneck 109 arranged at the discharge end of the straight portion 108, the gooseneck 109 The inner cavity is inclined upwards and communicates with the mold cavity 6, and the upper wall of the inner cavity of the straight part 108 and the upper wall of the inner cavity of the goose neck 109 pass through the inclined part arranged at the end of the straight part 108 1080 transition connection, the lowest point 1081 of the inclined part 1080 is lower than the lowest point 1051 of the outlet 105 of the gooseneck 109, by making the lowest point 1081 of the inclined part 1080 and the outlet 105 of the gooseneck 109 There is a suitable height difference between the lowest point 1051, from figure 1 It can be seen that the minimum height of the molten metal i...

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Abstract

The invention discloses an injection device for a die-casting machine. The injection device comprises an injection component, a mold component and a driving mechanism, wherein the injection component is used for injecting molten metal, the mold component is used for forming a casting, and the driving mechanism is used for providing injection power. The injection component comprises a charging barrel and a plunger slidably arranged in the charging barrel, the tail end of the plunger is connected with the driving mechanism, the plunger comprises a plunger rod and a plunger head, the side wall of the plunger head is provided with a first sealing portion in sliding fit with the inner wall of the charging barrel, the plunger head is provided with a hollow cavity, the hollow cavity is provided with an opening communicated with a pressure chamber in the front of the plunger head, and the first sealing portion is positioned on a slice area with a certain deformation capacity formed between the hollow cavity and the outer wall of the plunger head. The die-casting machine has a fine sealing function in the injection process, the larger the injection pressure is, the closer the seal is, casting quality can be greatly improved, production efficiency is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a material injection device used on a die-casting machine, belonging to the technical field of die-casting. Background technique [0002] Die-casting technology is to quickly fill the mold cavity with molten metal under high pressure and high speed, and solidify the casting under high pressure. It is currently the most productive casting process. In the process of injection die-casting of castings, the alloy material needs to be heated first to form molten metal, and then the molten metal is introduced into the barrel of the injection device, and finally the molten metal is drawn out of the barrel through the plunger. Pushed into the mold for compression molding. Since the molten metal is injected into the barrel, the temperature is very high, and there must be a certain injection pressure during the injection process, which requires a good sealing effect between the plunger and the inner wall of the barrel. [0003] For exam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/20
CPCB22D17/2023
Inventor 捷卡姆.查马特
Owner SDT SMART DIECASTING TECH (SUZHOU) CO