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advanced used counter rotating twin screw extruder

- Aug 07, 2022 -

advanced used counter rotating twin screw extruder

Used 62mm Maplan Counter Rotating, Conical Twin Screw Extruder, Model DSK 62, 40 HP Marathon AC Motor(Does Not Include AC Drive), No Cooling On Barrel, No Vacuum Pump

Used 62mm Maplan Counter Rotating, Conical Twin Screw Extruder, Model DSK 62, 50 HP Baldor/Reliance AC Inverter Duty Motor. Yaskawa A1000 AC Inverter Drive, 4 Barrel Heat Zones, 3 Air Cooling Zones, Vented Barrel...

34mm Leistritz Counter Rotating Twin Screw Extruder, Model LSM30/34 Twin Screw Extruder, 30:1 L/D Ratio, Twin Screw Extruder, 15 HP DC Motor With Control Techniques Drive, 7 Barrel Zones, 2 Die Zones, Air Cooled,...

52102001 Used-90mm Krauss Maffei Model KMD90 Counter-Rotating Twin Screw Extruder. New 1994. Has electrically heated oil cooled barrel, includes temperature control panel, driven by 40HP DC motor with SCR control.

ToGum Model TOE 40, variable speed, counter rotating, twin screw extruder. Equipped with two 33mm diameter x 16" long screws, two variable temperature controllers, and push button controls. Mounted on casters.

Used Leistritz twin screw pelletizing line, model Micro18-GGL, 18 mm screws, counter rotating screws, 40:1 l/d, 500 rpm screw speed, electrically heated, water cooled barrel, 2.3 kw, 210/260 volt, 2950 rpm dc mot...

Variable speed counter rotating twin screw extruder. Equipped with two screws measuring 100mm (3.937") wide x 44" long. Features product infeed hopper into a 5"L x 5"W feed throat, five electrical heating zone...

Bausano and Figli Spa Model TR2-100-5/A variable speed, counter rotating twin screw extruder with pounds of product per hour – depending on materials and application. Equipped with (2) screws measuring 100mm (3.9...

50mm Leistritz Model ZSE50GG counter rotating twin screw extruder. Driven by 46kw AC motor 2200 rpm, 460 volt, AC input (missing HMI for operator control). Has temperature control panel, motor drive and electrica...

1 – used .8 in. Welding Engineers Twin Screw Extruder. Model HT0.8. With counter rotating tangential screws. Barrel with (7) sections including (2) vented and plugged sections and (1) vented section. Electrically...

Welding Engineers Inc. twin screw direct extruder. Model D-2 ¾ 10-EC. Stainless steel contact surfaces. The extruder has non-intermeshing, counter-rotating, 2.75" diameter screws. One screw measures 10" long and ...

advanced used counter rotating twin screw extruder

We analyzed the non-Newtonian and non-isothermal flow in the melt conveying zone in co-rotating and counter-rotating screw extruder system with the commercial code, STAR-CD, and compared the mixing performance with respect to screw speed and rotating direction. The viscosity of fluid was described by power-law model. The dynamics of mixing was studied numerically by tracking the motion of particles in a twin screw extruder system. The extent of mixing was characterized in terms of the residence time distribution and average strain. The results showed that high screw speed decreases the residence time but increases the shear rate. Therefore higher screw speed increases the strain and has better mixing performance. Counter-rotating screw extruder system and co-rotating screw extruder has the similar shear rate with the same screw speed in spite of different rotating direction. However, the counter-rotating screw has good mixing performance, which is resulted from longer residence time than that of co-rotating screw extruder

Full Text Available In view of the unreasonable design of non-intermeshing counter-rotating twin screw extruder die, the problem of productivity reduction was discussed. Firstly, the mathematical model of extruder productivity was established. The extruder die model was improved. Secondly, the force analysis of twin screw extruder physical model was carried out. Meanwhile, A combination of mechanical analysis and numerical simulation was adopted. The velocity field, pressure field and viscosity field were calculated by Mini-Element interpolation method, linear interpolation method and Picard iterative convergence method respectively. The influence of die model on the quantity of each field before and after improvement was analyzed. The results show that the improved model had increased the rheological parameters of the flow field, the leakage and reverse flow decreased. Through post-processing calculation, the productivity of the third dies extruder was 10% higher than before. The research results provide a theoretical basis for the design and optimization of die model of non intermeshing counter-rotating twin screw extruder.

The objective of this study was to investigate the screw configuration allowing oil extraction from sunflower seeds with a twin-screw extruder. Experiments were conducted using a co-rotating twin-screw extruder. Five screw profiles were examined to define the best performance (oil extraction yield, specific mechanical energy and oil quality) by studying the influence of operating conditions, barrel temperature, screw speed and feed rate. Generally, the position and spacing between two reversed screw elements affected oil extraction yield. An increase of oil extraction yield was observed as the reversed screw elements were moved with increased spacing between two elements and with smaller pitch elements. In addition, oil extraction yield increased as barrel temperature, screw speed and feed rate were decreased. Highest oil extraction yield (85%) with best cake meal quality (residual oil content lower than 13%) was obtained under operating conditions of 120 {sup o}C, 75 rpm and 19 kg/h. Furthermore, the operating parameters influenced energy input. A decrease in barrel temperature and feed rate followed by an increase in screw speed increased energy input, particularly specific mechanical energy input. Effect of the operating parameters on oil quality was less important. In all experiments tested, the oil quality was very good. The acid value was below 2 mg of KOH/g of oil and total phosphorus content was low, below 100 mg/kg. (author)

The dissolution rate of the active pharmaceutical ingredients in pharmaceutical hot-melt extrusion is the most critical elementary step during the extrusion of amorphous solid solutions - total dissolution has to be achieved within the short residence time in the extruder. Dissolution and dissolution rates are affected by process, material and equipment variables. In this work, we examine the effect of one of the material variables and one of the equipment variables, namely, the API particle size and extruder screw configuration on the API dissolution rate, in a co-rotating, twin-screw extruder. By rapidly removing the extruder screws from the barrel after achieving a steady state, we collected samples along the length of the extruder screws that were characterized by polarized optical microscopy (POM) and differential scanning calorimetry (DSC) to determine the amount of undissolved API. Analyses of samples indicate that reduction of particle size of the API and appropriate selection of screw design can markedly improve the dissolution rate of the API during extrusion. In addition, angle of repose measurements and light microscopy images show that the reduction of particle size of the API can improve the flowability of the physical mixture feed and the adhesiveness between its components, respectively, through dry coating of the polymer particles by the API particles. Copyright © 2014. Published by Elsevier B.V.

The effect of extrusion variables, such as barrel temperature (100 to 170ºC), feed rate (100 to 500 g/min), feed moisture (20 to 40 g/100 g wet basis), screw speed rate (from 100 to 500 rpm), and slit die rheometer configuration (0.15 and 0.30 cm height) were studied using a co-rotating intermeshing twin-screw extruder coupled to a slit die rheometer on the rheological properties of yellow cornmeal. An increase in feed rate decreased WAI and WSI, but increased the viscosity values. The temper...

In this paper, a theoretical model for the mixing process in a self-wiping co-rotating twin screw extruder by combination of statistical techniques and mechanistic modelling has been proposed. The approach was to examine the mixing process in the local zones via residence time distribution and the flow dynamics, from which predictive models of the mean residence time and mean time delay were determined. Increase in feed rate at constant screw speed was found to narrow the shape of the residence time distribution curve, reduction in the mean residence time and time delay and increase in the degree of fill. Increase in screw speed at constant feed rate was found to narrow the shape of the residence time distribution curve, decrease in the degree of fill in the extruder and thus an increase in the time delay. Experimental investigation was also done to validate the modeling approach.

Full Text Available The effect of extrusion variables, such as barrel temperature (100 to 170ºC, feed rate (100 to 500 g/min, feed moisture (20 to 40 g/100 g wet basis, screw speed rate (from 100 to 500 rpm, and slit die rheometer configuration (0.15 and 0.30 cm height were studied using a co-rotating intermeshing twin-screw extruder coupled to a slit die rheometer on the rheological properties of yellow cornmeal. An increase in feed rate decreased WAI and WSI, but increased the viscosity values. The temperature interacts strongly with screw speed in affecting the WSI. The most important factor in starch degradation was the screw speed. Increasing the screw speed completely modifies the organised structure of starch (crystalline region.

The bulk polymerization of n-butylmethacrylate was investigated in a counter-rotating twin screw extruder. It appeared that the gel effect, occurring with bulk polymerizations, affected the polymerization progress very strongly. Due to this effect the conversion of the reaction is independent of the

Wheat starch was liquefied to DE 25-30 employing heat stable ..cap alpha..-amylase and twin-screw We