Rapidryer
Dry Engineering Grade Plastics in 30 minutes
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Method of Operation
The RAPIDRYER uses the rapid application of heat to increase the vapor pressure inside plastic pellets and to force entrapped moisture to the pellet surface.
A counter flow of heated air strips the moisture from the pellet and transports it away to the atmosphere leaving dry plastic.
The interior of the dryer is comprised of a series of radially oriented vertical aluminum fins. Inside each fin, from bottom to top is a heatpipe. The heatpipe extends into the base of the dryer where it is heated by conventional electric heater bands. The heatpipe quickly becomes isothermal and transfers it’s latent heat energy into the vertical fin powering the fin to a uniform temperature along it’s length.
The vertical fins are shaped and situated in such a way as to maximize radiant and conductive heat transfer to the plastic pellets. The result is much faster heating of the pellets than by the use of circulating hot air which is not an efficient heat conductor. Since the fins in the RAPIDRYER are the same temperature top to bottom, plastic becomes heated as soon as it enters the top of the dryer, unlike a desiccant or hot air dryer that has a significant temperature gradient through the hopper.
Ambient air is drawn in by a vacuum motor through restricted inlets at the top of the dryer. It is transferred through a channel in each of the fins adjacent to the heatpipes where it is heated. The air is extracted through the bed of plastic pellets by the vacuum diffuser, stripping off the moisture which is then exhausted from the dryer.
The vacuum motor also connects with an annular opening in the base of the dryer. This extracts any gases or vapors generated in the rear zone of the molding machine screw/barrel.
The result of this technology, it dries plastic in 30 minutes with low energy consumption, no desiccant or dew point to monitor and only one moving part.
The RAPIDRYER offers excellent drying of most hygroscopic plastic materials, especially nylons and high temperature resins such as; PC, PET, PEI, PSU, PBT and LCP.
SPECIFICATIONS
| Rapid Dryer |
RD1500 |
RD 2000 |
| Height |
24" |
29" |
| Diameter |
10" |
10" |
| Width (including control cabinet) |
15" |
15" |
| Weight |
40 lbs |
50 lbs |
| Capacity |
0.5 cu/ft |
0.8 cu/ft |
| Power |
1.5 KW |
2.0 KW |
| Voltage |
240 VAC |
240 VAC |
| Base |
6"X 6" |
6"X 6" |
MATERIAL TEMPERATURE THROUGHPUT for RAPIDRYER
| MATERIAL |
TEMP F |
TEMP C |
RD1500
|
RD2000
|
| |
|
|
lb/kg per hr
|
lb/kg per hour
|
| ABS |
190 - 220 |
88 - 105 |
20/09
|
30/14
|
| ABS/PC |
225 - 275 |
106 - 135 |
30/14
|
40/18
|
| ACETAL |
220 - 250 |
105 - 122 |
40/18
|
60/27
|
| ACRYLIC |
190 - 225 |
88 - 106 |
25/11
|
35/16
|
| ASA |
190 - 220 |
88 - 105 |
25/11
|
30/14
|
| NYLON |
225 - 325 |
106 - 163 |
40/18
|
60/27
|
| PBT |
225 - 350 |
106 - 177 |
30/14
|
40/18
|
| PC |
225 - 300 |
106 - 149 |
30/14
|
50/23
|
| PEI (ULTEM) |
275 - 375 |
135 - 191 |
20/09
|
30/14
|
| PEEK |
275 - 350 |
135 - 177 |
15/07
|
20/09
|
| PET |
225 - 350 |
107 - 177 |
15/07
|
20/09
|
| PPO (NORYL) |
220 - 250 |
105 - 122 |
35/16
|
50/23
|
| PSU |
250 - 375
|
122 - 191 |
20/09
|
25/11
|
| PUR |
200 - 230
|
94 - 108 |
25/11
|
35/16
|
| PVC |
180 - 220 |
82 - 105 |
40/18
|
60/27
|
| SAN |
190 - 220 |
88 - 105 |
20/09
|
30/14
|
| TPE |
200 - 230 |
94 - 108 |
25/11
|
35/16
|
| LCP |
325 - 375 |
163 - 191 |
20/09
|
25/11
|
| 
