……………….better cash flow. INTRODUCTION The StaMixCo SMN* Mixing Nozzle contains eight (8) very efficient static mixing elements that homogenize the polymer melt during injection. The static mixing elements have no moving parts and accomplish mixing by the geometric structure of mixing bars that continuously divide and recombine the molten polymer flowing through them. Since there are no moving parts, the static mixing unit requires little maintenance, is virtually indestructible and creates a low pressure drop. * Licensee of Bayer, AG; Leverkusen, Germany Figure #3: Mixing of blue and white epoxy resins. Empty tube (left) provides no mixing. Eight (8) SMN mixing elements (center and right) provide an excellent mix quality in a short length. Figure #1: StaMixCo Injection Molding Mixing Nozzle with eight (8) Mixing Elements, Heater Bands and Thermocouple. Figure #2: The SMN Mixing Elements are extremely strong due to their monolithic cast construction where the mixing bars are joined to each other and to the ring wall via a single molten metal pour. Figure #4: SMF Filter-SMN Mixing Element combination used to retain particles to protect hot runner system and tools when processing

MIXING QUALITY The optimum melt quality for injection molding applications is to have at each location inside the polymer melt volume, just prior to injection into each cavity, a well mixed/uniform concentration of colorant and additives and the same melt temperature. Once this optimum mix quality is achieved; the following benefits will be realized: Reduced spots, streaks and clouds of color. Reduced colorant usage (10% - 40%). Improved part quality when using regrind. Increased use of regrind material. Narrower part tolerances. Reduced reject rates. Less part distortion. Less part weight variation....

The proper size of SMN Mixing Nozzle is a function of the injection flow rate and viscosity of the polymer melt at the operating conditions. For most applications, the below Table #1 provides a conservative estimate of required size based on the operating experience of thousands of mixing nozzles supplied to injection molders. For budget sizing purposes, a conservative choice will be to choose the largest size nozzle resulting from your machines characteristics of Clamping Force (Technique®), Screw Size (Technique©) and Injection Flow Rate (Technique©). For critical applications such as the installation...

SMN Mixing Nozzles are available in six standard sizes that will satisfy the processing requirements of most injection molders. The Standard SMN Mixing Nozzle dimensions are shown in Figure #8. Extended Nozzle bodies are also available as shown in Figure #9. Key dimensions of the units are shown in Table #3 Figure #8: Standard SMN Mixing Nozzle with eight (8) mixing elements Figure #9: Extended Nozzle Body with standard eight (8) mixing elements. Added length can also be designed in the nozzle input adaptor. Table #3: Key Dimensions of Standard and Extended Nozzle Body Mixing Nozzles stam/xcowww.stamixco.com...