pps machined components

PPS Machining Overview

PPS is a high temperature plastic. It shows good chemical resistance, high mechanical strength, good machinability, and great dimensional stability. Besides  PPS Virgin, another very common PPS plastic is PPS GF40(PPS 40% glass fiber reinforced). PPS GF40 has very high percentage glass fiber, thus makes the material stiff and easy to crack. So for machining PSS GF40, the material should be pre-heated before any process. 

PPS Machining Guide

PPS Sawing
plastic sawing

Material 

Rotate Speed [rpm]

Circular Pitch

PPS Virgin

3000

20~24

PPS GF40

2400~2800

20~24

PPS Drilling

Material 

Number of Teeth

Helix Angle

Approach Angle

Cutting Speed

[rpm]

Feed Force

[mm/r]

PPS Virgin

Z2

25

90

50~200

0.1~0.3

PPS GF40

Z2

25

100

80~100

0.1~0.3

Note: Only for Keward Plastics. Fro PPS GF40, when the diameter is larger than 60mm, the material should be pre-heated.

PPS Milling
plastic milling

Material 

Number of Teeth

Cutting Speed

[rpm]

Feed Force

[mm/r]

PPS Virgin

Z2~Z4

250~500

0.1~0.45

PPS GF40

Z2~Z4

80~150

0.05~0.4

PPS Turning

Material 

Relief Angle

Approach Angle

Corner

Cutting Speed

[rpm]

Feed Force

[mm/r]

PPS Virgin

6

0~5

45~60

250~500

0.1~0.5

PPS GF40

6~8

2~8

45~60

80~150

0.1~0.5

Note: Only for Keward Plastics.

PPS Heat Treatment

Material 

Heating

Keeping

Cooling

PPS

3h heating to 120℃, then 4h heating to 220℃

1.5h/10mm thickness

cooling to 40℃ at speed of 20℃/h

Note: Only for Keward Plastics. The heat treatment above is a rough numbers, and only suit for the components which the thickness is less than 50mm. If the thickness is larger than 50mm, Please Send Us Email.