A high-vacuum rapid realization device for die-casting molds

A high-vacuum, die-casting mold technology, applied in the field of casting, can solve the problems of low gas content, high mechanical properties, and low vacuum degree of castings, and achieve the effects of high mechanical properties, low gas content, and reduced air entrainment

Active Publication Date: 2019-10-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a high-vacuum rapid realization device for die-casting molds, which studies the structure and specific arrangement of key components such as die-casting units, vacuuming units and control units And design, correspondingly can effectively solve the problems of slow pumping speed and relatively low vacuum degree in the current high vacuum die-casting technology, with fast pumping speed, less residual gas in the cavity, low gas content of castings, high mechanical properties, Good quality and other advantages

Method used

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  • A high-vacuum rapid realization device for die-casting molds
  • A high-vacuum rapid realization device for die-casting molds
  • A high-vacuum rapid realization device for die-casting molds

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Embodiment 1

[0047] In this embodiment, according to the method for fast realization of high vacuum in die-casting molds of the present invention, YL104-based aluminum alloys (the impurity content in the alloy is controlled to be Fe<0.20%, Cu<0.05%) are die-casted on a 4000kN horizontal cold chamber die-casting machine.

[0048] First of all, make a good seal on the die-casting mold. The specific sealing method can adopt the sealing structure of the existing high-vacuum pressure casting die-casting mold. The vacuum valve structure adopts a hydraulic drive type with a large exhaust area. Two vacuum valves are connected in parallel, and the vacuum valves are connected in parallel. The total exhaust area of ​​the casting is equal to 30% of the cross-sectional area of ​​the casting cavity; then the YL104 alloy is melted, refined, and an appropriate amount of modifier and refiner is added to control the appropriate temperature for pouring, and the mold is preheated to 150 ~200°C, pour an appropr...

Embodiment 2

[0051] In this embodiment, according to the method for quickly realizing the high vacuum of the die-casting mold of the present invention, the YL104-based alloy (the impurity content in the alloy is controlled Fe<0.20%, Cu<0.05%) is die-casted on an 8000kN horizontal cold chamber die-casting machine.

[0052] First of all, make a good seal on the die-casting mold. The specific sealing method can adopt the sealing structure of the existing high-vacuum pressure casting die-casting mold. The vacuum valve structure adopts a hydraulic drive type with a large exhaust area. Three vacuum valves are connected in parallel, and the vacuum valves are connected in parallel. The total exhaust area of ​​the casting is equal to 40% of the cross-sectional area of ​​the casting cavity; then the YL104 alloy is melted, refined, and an appropriate amount of modifier and refiner is added to control the appropriate temperature for pouring, while the mold is preheated to 150- At 200°C, pour an appropr...

Embodiment 3

[0055] In this embodiment, according to the method for fast realization of high vacuum of the die-casting mold of the present invention, the YL104-based alloy (the impurity content in the alloy is controlled Fe<0.20%, Cu<0.05%) is die-casted on a 16000kN horizontal cold chamber die-casting machine.

[0056] First of all, make a good seal on the die-casting mold. The specific sealing method can adopt the sealing structure of the existing high-vacuum pressure casting die-casting mold. The vacuum valve structure adopts a hydraulic drive type with a large exhaust area, and 4 vacuum valves are connected in parallel. Parallel vacuum valves The total exhaust area of ​​the casting is equal to 35% of the cross-sectional area of ​​the casting cavity; then the YL104 alloy is melted, refined, and an appropriate amount of modifier and refiner is added to control the appropriate temperature for pouring, while the mold is preheated to 150 ~200°C, pour an appropriate amount of molten metal int...

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Abstract

The invention belongs to the technical field of casting and particularly discloses a high-vacuum-degree fast implementation device of a die-casting die. The high-vacuum-degree fast implementation device comprises a die-casting unit, a vacuum pumping unit and a control unit. The die-casting unit comprises a forming assembly and a pressing-injection assembly. The forming assembly comprises a movabledie, a fixed die and centers; a cavity is formed between the movable die and the fixed die; center holes communicating with the cavity are formed in the movable die; the centers are inserted in the center holes, and the parts, exposed out of the movable die, of the centers are sealed through a sealing device; and the pressing-injection assembly communicates with the cavity. The vacuum pumping unit comprises a vacuum tank and a vacuum pump connected with the vacuum tank, the vacuum tank communicates with the sealing device through a center gas sucking pipeline and communicates with the cavitythrough a cavity gas sucking assembly, and the control unit is connected with the die-casting unit and the vacuum pumping unit. The high-vacuum-degree fast implementation device has the advantages ofbeing high in gas sucking speed, little in residual gas in the cavity, low in gas content of a casting, high in mechanical property, good in quality and the like.

Description

technical field [0001] The invention belongs to the technical field of casting, and more specifically relates to a device for rapidly realizing high vacuum degree of a die-casting mold. Background technique [0002] Compared with other liquid forming methods, die casting is easier to automate, and has the advantages of high casting dimensional accuracy, good surface finish and high production efficiency, so it has been widely used in industries such as automobiles and electronic equipment. However, die casting is a forming process in which liquid metal fills the mold cavity at a very high speed under the action of high pressure. The gas in the cavity will be involved in the molten metal before it can be discharged, and will form pores in the casting after the molten metal solidifies. Form exists, which makes it impossible to carry out heat treatment and welding treatment, and the mechanical properties cannot be further improved, thus limiting the application of die castings ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/22B22D17/20B22D17/14
CPCB22D17/14B22D17/20B22D17/22
Inventor 吴树森张东城吕书林毛有武郭威
Owner HUAZHONG UNIV OF SCI & TECH
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