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Manufacturing of precision castings performed with lost wax process

Japanese

Technologically-orientedEDesign standard

Technologically-oriented

  • High precision casting, Large size aluminum alloy, Weight saving by magnesium alloy
  • Omission of machining and improvement in material yield
  • Reduction of parts number by means of monoblock casting of components with multiple parts.
  • Design standard that shortens delivery time by use of rapid prototyping pattern

[ Irrelevant design example ]

The example of drastic change in the thickness ( T1 > 10T2 )

Its shape changes greatly and the accuracy of dimension gets worse.

The example of extremely thin thickness

Misrun happens often. (Although 1mm or more is desirable, around 0.5mm is locally possible)

Case of W2 > W1 , H > 3W2 in the drawing

Due to high defective fraction, W1 > W2 , H < 3W2 is better.

Example of the tall tube with a bottom as shown in the drawing.

Due to high defective fraction, it is better to make a hole in the bottom.

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iƒCj¡–@Œö·@@Linear Tolerance

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Dimensions
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Normal Tolerance
Up to 15mm}0.20mm
15`25mm}0.25mm
25`50mm}0.35mm
50`75mm}0.50mm
75`100mm}0.70mm
100`125mm}0.90mm
125`150mm}1.00mm
150`175mm}1.10mm
175`200mm}1.20mm
200`225mm}1.30mm
225`250mm}1.40mm
250mm and Over}1.50mm

iƒj•½–Ê“xŒö·@@Flatness Tolerance

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Length
ˆê”ÊŒö·
Normal Tolerance
Up to 50mm0.30mm
50`100mm0.50mm
100`200mm0.70mm
200`300mm0.80mm
300mm and Over1.00mm

For investment castings, the dimension tolerance above are normally used. Although, it is possible to narrow the dimension tolerance for certain points by controlling the mold accuracy and manufacturing process.

In addition, it is possible to lower the cost improve the quality of your products by combining castings with machining. So please feel free to contact us.

iƒnjŠp“xŒö·@@Angular Tolerance

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Normal Tolerance
ƒ¿}1‹
ƒÀ}1‹
ƒÁ}1.5‹
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Surface Roughness
25S ˆÈ‰º
Under 25S

iƒjjPlease inform a datum level for dimension measurement on a drawing of plural shapes.

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Nidak Seimitsu, inc.

105-8 Ichinotsubo, Yunuki, Souma-City, Fukushima-Pref. Japan 979-2512