Knowledge of casting
POM valve body,plastic valves,Pneumatic Components, Push-in pneumatic fittings
2014-07-23Casting Technology
2014-07-26
what is the investment casting – precision casting -lost wax casting ?
——– Investment casting is one of the most basic metal-forming techniques. It is a multi-step process that delivers fine details at a reasonable cost. The equipment cost for investmentcasting is considered to be minimal, compared with other forms of full-mold casting or die casting.
In investment casting, a master pattern is created using wax, wood, foam or other materials. The master pattern is essentially a prototype of the part that is to be made. This master pattern is then converted into a mold, or master die, that might be made of metal steel wood or rubber.
After the mold has been made, wax is poured into it to make the wax patterns and allowed to cool. After cooling, the wax patterns are assembled in preparation for casting. During this stage, the wax patterns might also be chased and dressed, removing the flashing and any other imperfections in the surface of the pattern using a heated tool.
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技术指南
TECHNICAL INFORMATION
尺寸公差 DIMENSION TOLERANCE
线性公差 Linear Tolerance （参照德国熔模铸造公差标准 VDG Merkblad P690）
|
基本尺寸（mm） |
长*宽*高（mm） |
中心距离（mm） |
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|
D1 |
D2 |
D3 |
D1 |
D2 |
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|
> |
≤ |
公差 |
公差带 |
公差 |
公差带 |
公差 |
公差带 |
公差 |
公差 |
|
0 |
6 |
±0.10 |
0.20 |
±0.08 |
0.16 |
±0.06 |
0.12 |
±0.25 |
±0.16 |
|
6 |
10 |
±0.12 |
0.24 |
±0.10 |
0.20 |
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|
10 |
14 |
±0.15 |
0.30 |
±0.12 |
0.24 |
±0.09 |
0.18 |
||
|
14 |
18 |
±0.20 |
0.40 |
±0.14 |
0.28 |
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|
18 |
24 |
±0.25 |
0.50 |
±0.17 |
0.34 |
±0.12 |
0.23 |
±0.32 |
±0.20 |
|
24 |
30 |
±0.30 |
0.60 |
±0.20 |
0.40 |
±0.14 |
0.27 |
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|
30 |
40 |
±0.37 |
0.74 |
±0.25 |
0.50 |
±0.17 |
0.33 |
±0.50 |
±0.30 |
|
40 |
50 |
±0.44 |
0.88 |
±0.30 |
0.60 |
±0.20 |
0.39 |
||
|
50 |
65 |
±0.52 |
1.04 |
±0.38 |
0.76 |
±0.23 |
0.46 |
±0.71 |
±0.45 |
|
65 |
80 |
±0.60 |
1.20 |
±0.46 |
0.92 |
±0.27 |
0.53 |
||
|
80 |
100 |
±0.68 |
1.38 |
±0.53 |
1.06 |
±0.30 |
0.60 |
±0.90 |
±0.60 |
|
100 |
120 |
±0.76 |
1.52 |
±0.60 |
1.20 |
±0.33 |
0.66 |
||
|
120 |
140 |
±0.84 |
1.68 |
±0.65 |
1.30 |
±0.36 |
0.71 |
±1.15 |
±0.85 |
|
140 |
160 |
±0.92 |
1.84 |
±0.72 |
1.44 |
±0.38 |
0.76 |
||
|
160 |
180 |
±1.02 |
2.04 |
±0.80 |
1.60 |
±0.42 |
0.81 |
||
|
180 |
200 |
±1.12 |
2.24 |
±0.88 |
1.76 |
±0.43 |
0.86 |
±1.80 |
±1.00 |
|
200 |
225 |
±1.28 |
2.56 |
±0.95 |
1.90 |
±0.47 |
0.93 |
||
|
225 |
250 |
±1.44 |
2.88 |
±1.05 |
2.10 |
±0.51 |
1.02 |
||
|
250 |
280 |
±1.64 |
3.28 |
±1.15 |
2.30 |
±0.56 |
1.12 |
±2.20 |
±1.25 |
|
280 |
315 |
±1.84 |
3.68 |
±1.25 |
2.50 |
±0.63 |
1.26 |
||
|
315 |
355 |
±2.10 |
4.20 |
±1.40 |
2.60 |
±0.71 |
1.42 |
±2.60 |
±1.60 |
|
355 |
400 |
±2.40 |
4.80 |
±1.60 |
3.20 |
±0.80 |
1.60 |
||
|
D1：为通常使用的一般尺寸公差 |
D1：General dimension tolerances |
|
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|
铸造能力范围 OUR CASTING CAPABILITIE |
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|
1）铸孔深度 Depth of casting hole |
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|
通孔 Through Hole |
盲孔 Blind Hole |
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|
用陶瓷型芯可铸造出更深的孔，但会额外增加费用，只适宜于大批量生产。 |
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|
2） 最小壁厚 Minimum wall thickness：2mm |
R≥0.3mm |
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|
铸造能力范围 CASOUR CASTING CAPABILITIE |
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|
1.5Min |
避免壁厚急剧过渡 Avoid sharp shange in thickness | ||||||||
| 避免尖角 Avoid sharp angle |
避免尖边 |
避免十字热节 Avoid cross section | |||||||
