Reaction Injection Molding (RIM)- Low Quantity Injection Molding - - PowerPoint PPT Presentation

▶
reaction injection molding rim
SMART_READER_LITE
LIVE PREVIEW

Reaction Injection Molding (RIM)- Low Quantity Injection Molding - - PowerPoint PPT Presentation

Feb 04, 2023 136 likes •444 views

Reaction Injection Molding (RIM)- Low Quantity Injection Molding for the Life Sciences Industry Presented by: Ken Schweitz, President and Doug Culbertson, VP Business Development of Premold Corp Section I. Advantages of RIM Economical

slide-1
SLIDE 1

Reaction Injection Molding (RIM)- Low Quantity Injection Molding for the Life Sciences Industry

Presented by: Ken Schweitz, President and Doug Culbertson, VP Business Development

  • f

Premold Corp

slide-2
SLIDE 2

2

Section I. Advantages of RIM

 Economical For Low Quantities  Lower Cost Molds  Shorter Tooling Lead Time  More Design Freedom

slide-3
SLIDE 3

3

Section I. Advantages of RIM (cont.)

 Economical For Low Quantities

  • Lower set-up and run costs
slide-4
SLIDE 4

4

Section I. Advantages of RIM (cont.)

 Lower Cost Molds

  • Lower molding pressures
  • Lower mold temperatures
  • Side actions cost less
slide-5
SLIDE 5

5

 Shorter Tooling Lead Times

  • Faster machining aluminum molds

Section I. Advantages of RIM (cont.)

slide-6
SLIDE 6

6

Section I. Advantages of RIM (cont.)

 More Design Freedom

  • Variable wall thickness within the same part
  • Bosses and ribs can be larger and taller
slide-7
SLIDE 7

7

Section II. How the RIM Process Works

 Two liquids are mixed as they’re injected into the mold

slide-8
SLIDE 8

8

RIM Dispensing Unit

Section II. How the RIM Process Works

(cont.)

Rim Dispensing Unit

slide-9
SLIDE 9

9

 Chemical reaction

Section II. How the RIM Process Works (cont.)

between two liquids creates thermoset plastic part

slide-10
SLIDE 10

10

Section II. How the RIM Process Works

(cont.)

 Less than 50 psi molding pressure

  • Process based on resin flow to

fill mold instead of high pressure to force resin into mold

  • RIM presses tilt and rotate

molds to compound angles to facilitate filling molds  Mold temperatures of 180 F, resin starts at 100 F, peak exothermic heat of 250 F

slide-11
SLIDE 11

11

Section III. Part Design Advantages

 Easier to design for than high pressure injection molding

  • RIM Design Guide

available

slide-12
SLIDE 12

12

Section III. Part Design Advantages (cont.)

 More forgiving of variable wall thickness  Larger bosses and ribs can be used without sink

slide-13
SLIDE 13

13

Section III. Part Design Advantages (cont.)

 Side actions are less costly

slide-14
SLIDE 14

14

Section III. Part Design Advantages (cont.)

 Easier to mold complex features on both sides of parts

  • All part features molded-in – nothing glued or post-machined
slide-15
SLIDE 15

15

Section III. Part Design Advantages (cont.)

 Easier to combine multiple parts into one part

 Can obtain thermal and acoustic insulation, especially with thicker wall parts

slide-16
SLIDE 16

16

Section III. Part Design Advantages (cont.)

 Easier to mold in locating features to make assemblies fit better consistently

slide-17
SLIDE 17

17

 Resin flows easier to fill larger,  Molded parts are more rigid

Section III. Part Design Advantages (cont.)

65 in

more complex parts

slide-18
SLIDE 18

18

Section III. Part Design Advantages (cont.)

 Tight tolerances are achievable

  • +/-0.001 in/in is typical

 UL flame rated solid and foamed resins available  Thermoset resins resist chemicals

slide-19
SLIDE 19

19

Section III. Part Design Advantages (cont.)

 Insert molding and encapsulation easier to do

  • Hermetically seals parts
  • Eliminates assembly labor
  • Makes safe, tamper-proof products
slide-20
SLIDE 20

20

Section IV. Low Cost, High Value Molds

 Faster machining aluminum molds  Simpler ejector systems

slide-21
SLIDE 21

21

Section IV. Low Cost, High Value Molds

(cont.)  Low cost side actions

slide-22
SLIDE 22

22

 Less concern about coring and hot spots  Less critical water cooling systems

Section IV. Low Cost, High Value Molds

(cont.)

slide-23
SLIDE 23

23

Section IV. Low Cost, High Value Molds

(cont.)  Multi-cavity family molds can be used

slide-24
SLIDE 24

24

Section V. Post Molding Options

 EMI/RFI Shielding

slide-25
SLIDE 25

25

Section V. Post Molding Options (cont.)

 Painting  Decorating

slide-26
SLIDE 26

26

 Install threaded inserts

Section V. Post Molding Options (cont.)

slide-27
SLIDE 27

27

 Complete removal of gate and vent vestige  Machining

Section V. Post Molding Options (cont.)

slide-28
SLIDE 28

28

Section VI. In Summary

 Advantages of RIM

  • Economical for low quantity

injection molding because set-up costs are low

  • Molds cost less for more features
  • Shorter tooling lead times
  • More design freedom due to low

molding pressures and temperatures

slide-29
SLIDE 29

29

Thank You!

PREMOLD PREMOLD COR CORP

5657 Frontier Rd. Oconomowoc, WI 53066 262-569-9044

www.premoldcorp.com