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Pouring gate system for preparing plate-shaped casting and semi-solid die-casting forming process

A semi-solid, casting technology, applied in the field of sprue system and semi-solid die-casting forming process, can solve the problems of low service life, low thermal conductivity, easy to produce cracks, etc., to reduce the possibility of pore defects, reduce oxidation impurities, The effect of ensuring the quality of castings

Inactive Publication Date: 2021-02-09
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing conventional liquid special molds have low service life and are prone to cracks. Moreover, die-cast flat plate products have low mechanical properties, low thermal conductivity, and cannot be strengthened by heat treatment, which is increasingly unable to meet the needs of users.

Method used

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  • Pouring gate system for preparing plate-shaped casting and semi-solid die-casting forming process
  • Pouring gate system for preparing plate-shaped casting and semi-solid die-casting forming process
  • Pouring gate system for preparing plate-shaped casting and semi-solid die-casting forming process

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Such as Figure 1-3 As shown, a mobile phone mid-plate semi-solid die-casting mold includes a runner system, wherein the die-casting mold includes a fixed mold 2, a movable mold 7, a slider assembly 6, a heating system, and a gating system; between the fixed mold 2 and the movable mold 7 The casting cavity 12 is formed to obtain the mobile phone mid-plate casting 5, and the casting cavity 12 matches and matches the shape of the mobile phone mid-plate casting 5. In addition, an overflow groove 56 and an exhaust groove 57 are designed at the top corner of the mold cavity 12 of the casting cavity 12 to discharge semi-solid metal melt containing impurities and gases; a feed channel 1 is provided on the fixed mold 2; 7. A longitudinal lower groove on one side of the casting cavity 12 is formed on the inner surface along the transverse direction of the casting cavity 12, and a slider assembly 6 is arranged in the longitudinal lower groove; the fixed mold 2 and the movable mol...

Embodiment 2

[0069] Such as Figure 4 As shown, the difference from Example 1 is that the runner in Example 2 is a fan-shaped runner 56, and the cross-section along the filling direction shows an overall decreasing trend. Thinning features to increase fluidity, and to ensure uniform and stable semi-solid metal melt filling mold casting cavity.

Embodiment 3

[0071] Such as Figure 5 As shown, a runner system for preparing an aluminum alloy mobile phone mid-plate, wherein the length and width of the mobile phone mid-plate casting is 80*140mm, and the thickness is 0.25mm; the mobile phone mid-plate casting is flat and has a frame on the edge; The frame thickness is 0.25mm, and the frame height is 5mm;

[0072] The runner system is designed to control the flow state of the mold cavity filled with semi-solid metal melt. The runner system includes a sprue 52, a runner 53, and a gate 54;

[0073] Among them, the sprue 52 is connected with the feed channel of the material cake 51, and along the filling direction are the feed channel 1, the semicircular notch 63 of the slider, the sprue 52, the runner, the gate 54, and the middle plate casting of the mobile phone The casting cavity 12, overflow groove 56, exhaust groove 57.

[0074] One side of the runner 53 is vertically arranged and communicated with the sprue 52, and the other side i...

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Abstract

The invention discloses a pouring gate system for preparing a plate-shaped casting and a semi-solid die-casting forming process, and belongs to the technical field of semi-solid forming. The pouring gate system comprises a straight pouring gate, a transverse pouring gate and a sprue; one side of the transverse pouring gate vertically communicates with the straight pouring gate, and the other sideof the transverse pouring gate is connected with the side edge of a casting cavity of the plate-shaped casting through the sprue; in the mold filling direction, the sectional areas of the transverse pouring gate and the straight pouring gate are gradually reduced respectively; and a blank of the pouring gate system is a semi-solid blank, and the solid fraction of the blank is 30%-55%. According tothe pouring gate system, the fluidity is improved by utilizing the characteristic that a semi-solid metal melt is sheared and thinned in a mold filling process, so that the semi-solid metal melt uniformly flows into a product mold cavity; and the strength and plasticity of the material can be improved on the basis of the forming performance, the product density and surface quality are improved, and the characteristic of high viscosity of the aluminum alloy semi-solid metal melt is met.

Description

technical field [0001] The invention belongs to the technical field of semi-solid forming, in particular to a runner system for preparing plate castings and a semi-solid die-casting forming process. Background technique [0002] Semi-solid casting technology is a metal material forming technology that processes a solid-liquid metal mixture containing a certain proportion of non-dendritic solid phase within the solidification temperature range. Compared with the traditional metal material forming method, the processed material of semi-solid casting technology is in the liquid-solid coexistence two-phase region. On the one hand, it can reduce the latent heat of solidification and solidification shrinkage; on the other hand, due to the low forming temperature, the heat of the mold is reduced. Impact, improve the service life of the mold. In addition, the primary solid phase in the semi-solid processing material is spherical or nearly spherical. At low shear rates, the slurry h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/22
CPCB22D17/007B22D17/22B22D17/2218B22D17/2272
Inventor 陈颂李大全张帆冯剑
Owner 有研金属复材技术有限公司