- Part Design is important for function, market
success and can improve cost effectiveness
- New Part Designs / How to find them?
- Idea for new part properties / function
- But how to build the part?
- Designer / manufacturer discussion
- Dialog customer / mould maker / machine builder
- Networking for new solutions:
- competent partners are necessary
- and people to bring them together
- And somebody who is willing to take the risk
- Dialog customer / mould maker / machine builder
- Networking for new solutions:
- competent partners are necessary
- and people to bring them together
As we have gone through what is part design and mould
technologies let us have some case studies on it.
Case Studies 1
High-precision Medical Part:
Project REGUFLO with Smiths Medical:
Goal: New product for precise control of gravity driven
infusion more than 80% of the infusion
procedures is done gravity driven usually roller
clamp is used.
Roller Clamp:
roller
clamp gives pure accuracy of flow control with +/- 50%
-
Flow
changes with material relaxation
-
readjustment is necessary
Project REGUFLO:
"
Infusion set REGUFLO
" Flow control in the range from 2- 350 mL/h
" Flow rate with 10% accuracy adjustable
" Liquid tight system
" Flow controlled via microstructure
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REGUFLO - The Device
-
Housing (PP)
-
Connector Body (PC)
-
Rotary Element (PCM)
ACCURACY
b = 200 µm
with 5 µm tolerance
h = 200 -0 µm with 5 µm tolerance
In 4 different cavities
5 diameters of rotation axis:
Ø 7, 5 with 20 µm tolerance
Ø 9, 0 with 20 µm tolerance
on final part
Q= DV = DP
Dt R
Q = Flow rate
?p = pressure loss
R = flow resistance
R = flow resistance depends on the geometry of the
channel
Moulds:
- 4-cavity moulds (all 3 parts)
- Full hot runner
- Needle shut off gating
- Buried slides for micro channel contour with
parting line across the channel structure
Assembly of REGUFLO:
- Quality control of single parts
- Pad printing of scale on connector body
- Surface treatment of rotary element
- Assembly
- Quality tests (tightness and torque)
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