PMID- 35012204
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220113
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 14
IP  - 1
DP  - 2022 Jan 3
TI  - Adaptive Conformal Cooling of Injection Molds Using Additively Manufactured TPMS 
      Structures.
LID - 10.3390/polym14010181 [doi]
LID - 181
AB  - In injection molding, cooling channels are usually manufactured with a straight 
      shape, and thus have low cooling efficiency for a curved mold. Recently, additive 
      manufacturing (AM) was used to fabricate conformal cooling channels that could 
      maintain a consistent distance from the curved surface of the mold. Because this 
      conformal cooling channel was designed to obtain a uniform temperature on the 
      mold surface, it could not efficiently cool locally heated regions (hot spots). 
      This study developed an adaptive conformal cooling method that supports 
      localized-yet-uniform cooling for the heated region by employing micro-cellular 
      cooling structures instead of the typical cooling channels. An injection molding 
      simulation was conducted to predict the locally heated region, and a mold core 
      was designed to include a triply periodic minimal surface (TPMS) structure near 
      the heated region. Two biomimetic TPMS structures, Schwarz-diamond and gyroid 
      structures, were designed and fabricated using a digital light processing 
      (DLP)-type polymer AM process. Various design parameters of the TPMS structures, 
      the TPMS shapes and base coordinates, were investigated in terms of the conformal 
      cooling performance. The mold core with the best TPMS design was fabricated using 
      a powder-bed fusion (PBF)-type metal AM process, and injection molding 
      experiments were conducted using the additively manufactured mold core. The 
      developed mold with TPMS cooling achieved a 15 s cooling time to satisfy the 
      dimensional tolerance, which corresponds to a 40% reduction in comparison with 
      that of the conventional cooling (25 s).
FAU - Oh, Seo-Hyeon
AU  - Oh SH
AD  - Department of Mechanical System Design Engineering, Seoul National University of 
      Science and Technology, Seoul 01811, Korea.
FAU - Ha, Jong-Wook
AU  - Ha JW
AUID- ORCID: 0000-0003-0404-4193
AD  - Department of Mechanical System Design Engineering, Seoul National University of 
      Science and Technology, Seoul 01811, Korea.
FAU - Park, Keun
AU  - Park K
AUID- ORCID: 0000-0003-3823-0672
AD  - Department of Mechanical System Design Engineering, Seoul National University of 
      Science and Technology, Seoul 01811, Korea.
LA  - eng
GR  - NK230I/Korea Institute of Machinery and Materials/
GR  - 20016840/Korea Evaluation Institute of Industrial Technology/
PT  - Journal Article
DEP - 20220103
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC8747686
OTO - NOTNLM
OT  - additive manufacturing
OT  - conformal cooling channel
OT  - injection molding
OT  - micro-cellular structure
OT  - triple periodic minimal surface
COIS- The authors declare no conflict of interest.
EDAT- 2022/01/12 06:00
MHDA- 2022/01/12 06:01
PMCR- 2022/01/03
CRDT- 2022/01/11 01:17
PHST- 2021/11/09 00:00 [received]
PHST- 2021/12/13 00:00 [revised]
PHST- 2021/12/20 00:00 [accepted]
PHST- 2022/01/11 01:17 [entrez]
PHST- 2022/01/12 06:00 [pubmed]
PHST- 2022/01/12 06:01 [medline]
PHST- 2022/01/03 00:00 [pmc-release]
AID - polym14010181 [pii]
AID - polymers-14-00181 [pii]
AID - 10.3390/polym14010181 [doi]
PST - epublish
SO  - Polymers (Basel). 2022 Jan 3;14(1):181. doi: 10.3390/polym14010181.