investment casting,precision casting,lost wax casting, CNC machining

Turning CAD designs into metallic reality.

2014-07-23

Processing-assembly-of-train-track-components

Casting 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） Nominal dimension		长宽高（mm） Lengthwidthheight						中心距离（mm） Centre line distances
基本尺寸（mm） Nominal dimension		D1		D2		D3		D1	D2
> From	≤ To	公差 Tolerance	公差带 Field	公差 Tolerance	公差带 Field	公差 Tolerance	公差带 Field	公差 Tolerance	公差 Tolerance
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	±0.06	0.12
10	14	±0.15	0.30	±0.12	0.24	±0.09	0.18
14	18	±0.20	0.40	±0.14	0.28	±0.09	0.18
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	±0.32	±0.20
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	±0.50	±0.30
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	±0.71	±0.45
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	±0.90	±0.60
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	±2.20	±1.25
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	±2.60	±1.60

D1：为通常使用的一般尺寸公差
D2：适用于有公差要求的重要尺寸
D3：需要采取矫正等特殊措施才能达到，限于少数有特殊要求的尺寸

D1：General dimension tolerances
D2：Applicable to important dimensions requiring close tolerances
D3：Premium tolerances additional operations at extra cost,
only applied to a few special dimensions.

角度公差：±0.5^o～±1^o
直线度：每25mm误差0。127mm

Angle Tolerance：±0.5^o to ±1^o
Straightness：0.005″ per inch

铸造能力范围 OUR CASTING CAPABILITIE

1）铸孔深度 Depth of casting hole

通孔 Through Hole
D≤7mm: H≤2D
D>7mm: H≤3D
D>13mm: H≤4D
D_min=2mm

盲孔 Blind Hole
D≤7mm: L≤1D
D>7mm: L≤1.5D
D>13mm: L≤2D
D_min=2mm

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。
The scope can be enlarged by the use of pre-formed ceramic cores at additional cost,only economical for large quantities.

2）最小壁厚 Minimum wall thickness：2mm
（小范围 1mm，1mm for small area）

R≥0.3mm

铸造能力范围 CASOUR CASTING CAPABILITIE

1.5Min
2T Rec

避免壁厚急剧过渡 Avoid sharp shange in thickness

避免尖角 Avoid sharp angle

避免尖边
Avoid sharp edge

避免十字热节 Avoid cross section

Knowledge of casting

Turning CAD designs into metallic reality.

Casting Technology

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.

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