Thermoplastic elastomers have rapid cooling times and do not require secondary operations or curing agents, which leads to quick turnaround and fabrication.

Rapid Color Prototyping Technology

Rapid Color Prototyping Technology

Thermoplastic elastomers have rapid cooling times and do not require secondary operations or curing agents, which leads to quick turnaround and fabrication.

Rapid (seconds)

Rapid (seconds)

The ultra-light specialty fiber is used in demanding applications such as ballistic personal protection, marine and sustainable infrastructure, renewable energy, industrial protection and outdoor sports. The ultra-light specialty fiber is used in demanding applications such as ballistic personal protection, marine and sustainable infrastructure, renewable energy, industrial protection and outdoor sports. The ultra-light specialty fiber is used in demanding applications such as ballistic personal protection, marine and sustainable infrastructure, renewable energy, industrial protection and outdoor sports.

Cyanoacrylate is great for rapid one part processes, due to the various viscosities. End of Fill Part Length Dynamic Pressure Hydrostatic Pressure P re ss u re Gate End Part FIGURE 61 - Deflection Equations H F WLMax Deflection: 0.002" (0.05mm) 1 = W • H3 12 _______ bending = F • L3 48 • E • I _______ 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline FIGURE 60 - Pressure vs Part Length FIGURE 61 - Deflection equations FIGURE 62 - For Plate Shaped Parts FIGURE 63 - For Cylindrical Shaped Parts Design Guide 49 • MMoldings = Combined mass of molded parts • Cp = Specific Heat of the material Step 3 – Heat Removal Rate • Nlines = The total number of independent cooling lines there are in the mold • tc = The cooling time required by the part (Determined in step 1) Step 4 – Coolant Volumetric Flow Rate • ΔTMax,Coolant = Change in coolant Temperature During Molding (1°C) • ρCoolant = Density of coolant • CP = Specific heat of coolant Step 5 – Determine Cooling Line Diameter • ρCoolant = Density of coolant • VCoolant = Volumetric flow rate of coolant • μCoolant = Viscosity of coolant • ΔPline = Max pressure drop per line (Usually equals half of the pump capacity) • LLine = Length of the cooling lines COOLING LINE SPACING 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 4 πtc = h2 1n π2 • a • Tmelt – Tcoolant Teject – Tcoolant tc = D2 1.61n 23.1 • a Tmelt – Tcoolant Teject – Tcoolant a = k p * Cp Qmoldings = mmoldings • Cp • Tme • Cplt – Teject cooling nlines moldings tc cooling Vcoolant line nmax, coolant • Pcoolant • Cp, coolant Dmax = 4 • Pcoolant • Vcoolant π • µcoolant • 4000 Dmin = Pcoolant • Lline • V2 coolant 5 10π • ∆Pline 2D < H line < 5D H line < W line < 2H line FIGURE 70 - Cooling Line Spacing FIGURE 64 - Heat Transfer Equation FIGURE 65 - Total Cooling for Mold FIGURE 66 - Cooling Required by Each Line FIGURE 68 - Max Diameter Equation FIGURE 69 - Min Diameter Equation FIGURE 67 - Volumetric Flow Rate Equation 50 Gravi-Tech ADHESIVE ADVANTAGES DISADVANTAGES Cyanoacrylate Rapid, one-part process Various viscosities Can be paired with primers for polyolefins Poor strength Low stress crack resistance Low chemical resistance Epoxy High strength Compatible with various substrates Tough Requires mixing Long cure time Limited pot life Exothermic Hot Melt Solvent-free High adhesion Different chemistries for different substrates High temp dispensing Poor high temp performance Poor metal adhesion Light Curing Acrylic Quick curing One component Good environmental resistance Oxygen sensitive Light source required Limited curing configurations Polyurethane High cohesive strength Impact and abrasion resistance Poor high heat performance Requires mixing Silicone Room temp curing Good adhesion Flexible Performs well in high temps Low cohesive strength Limited curing depth Solvent sensitive No-Mix Acrylic Good peel strength Fast cure Adhesion to variety of substrates Strong odor Exothermic Limited cure depth Design Guide 51 Bibliography 1.

OnColor™ IR Sortable Black for Recyclable Packaging Nymax™ PIR Post-Industrial Recycled Nylon Formulations Bio-derived Content Based in whole or in part on bio-derived resources, or enable bio-based materials to perform at a level comparable to conventional polymers. This additive is particularly suitable in packaging for ultra-high temperature (UHT) liquid dairy products, as these types of products have a longer shelf life, making them more susceptible to light-induced oxidation due to ambient storage conditions. ASASE—Closing the Loop Ghana’s rapid economic growth has made it one of the leading countries in Africa.

OnColor™ IR Sortable Black for Recyclable Packaging Nymax™ PIR Post-Industrial Recycled Nylon Formulations Bio-derived Content Based in whole or in part on bio-derived resources, or enable bio-based materials to perform at a level comparable to conventional polymers. This additive is particularly suitable in packaging for ultra-high temperature (UHT) liquid dairy products, as these types of products have a longer shelf life, making them more susceptible to light-induced oxidation due to ambient storage conditions. ASASE—Closing the Loop Ghana’s rapid economic growth has made it one of the leading countries in Africa.