Diamond Systems Tritan Guía para resolver problemas Pagina 4
- Pagina / 44
- Tabla de contenidos
- SOLUCIÓN DE PROBLEMAS
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
Hot drops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Valve gates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Processing conditions using hot runner systems . . . . . . . . . . . . . . . 20
Venting and ejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Typical venting in molds designed for Eastman
™
polymers . . . . . . . . . 20
Ejection systems in molds designed for Eastman
™
polymers . . . . . . . . 21
Alloys for mold construction . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Family molds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mold polishing and texturing . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mold polishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Texturing mold surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Texturing methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Preventing surface defects . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Draft angle guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Using zero draft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Mold surface treatment to aid ejection . . . . . . . . . . . . . . . . . . . . . 23
Poly-Ond
™
coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Tungsten disulfide coatings . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Nicklon
™
coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
DLN (diamond-like nanocomposite) coating . . . . . . . . . . . . . . . . . 24
Part II Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Choosing the molding machine . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Machine size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Clamping force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Injection speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Screw and barrel design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Periodic inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Moisture measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
- polymers 1
- Contents 3
- Stress concentration factors 7
- Coring thick wall sections 7
- Rib and boss design 7
- Cooling 8
- Mold shrinkage and warpage 9
- Core cooling techniques 9
- Notes on cooling 11
- Sprue design 12
- Sprue location 13
- Sprue bushing 13
- Double-lead 13
- Runner design 14
- Gate design 15
- • Tab must be cut away 17
- 1.3–1.5 mm (0.050–0.060 in.) 17
- Hot runner systems 18
- Valve gates 19
- Figure 27 Valve gate 19
- Venting and ejection 20
- Alloys for mold construction 21
- Family molds 22
- Mold polishing and texturing 22
- Draft angle guidelines 22
- Using zero draft 23
- Poly-Ond 23
- coating 23
- Tungsten disulfide coatings 23
- Part II Processing 24
- Clamping force 25
- Injection speed 25
- Screw and barrel design 25
- Periodic inspection 26
- Equipment 26
- Figure 30 Injection nozzle 26
- Conditions 27
- Moisture measurement 29
- Dryer troubleshooting 29
- Dryer troubleshooting guide 30
- Injection molding 31
- Start-up 32
- Production molding 33
- Packaging and part handling 33
- Part III 34
- Secondary operations 34
- Ultrasonic welding 35
- Ultrasonic staking 36
- Heat staking 36
- Part IV Troubleshooting 37
- Molded-in stress 40
- PRETRIAL PREPARATION 41
- MOLDING CONDITIONS RECORD 42
- Eastman Chemical Company 44
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