filament dehumidifier - polycarbonate sheet manufacturers
F. D. M.
Use plastics based on 3D printers suchB. S. and P. L. A.
Very moisture absorption, easily damaged by moisture, resulting in failure of printing, nozzle blockage, splash, etc.
To avoid this, I have designed a silk storage unit that is also used as a dehumidifier.
The unit consists of two main parts, one air duct and one storage unit.
The unit uses Arduino, cross-flow fans, silicone desicant, sensors, and 100 W heaters to maintain a specific temperature and humidity in the chamber.
The main structure of this storage unit is made by welding several polycarbonate double wall panels together by solvent.
With a tool knife and a straight edge, take a double-layer polycarbonate plate and cut the panel (
Ruler: ruler or a piece of wood
800 of sand sandpaper can be used to wet the edge to make the edge smoother.
The following PDF contains details (
Size and quantity)of the panels.
The drawing was created using Autodesk Inventor.
Start by assembling the internal panel.
Take the two inner plates you have prepared and weld them with acetone in the syringe with solvent to make sure the workshop is well ventilated.
The two panels should be vertical and the cut-outs of the pipes should be away from each other.
Leave the inside of the L shape.
Now take 3 side plates and weld them into C-section with solvent (
Use the following figure as a reference).
After the welding of L and C is completed, as shown in the figure, weld them together and insert the back plate to make sure it is flush with U and welded out.
To complete the enclosure, remove the last remaining side panel and weld it to the opening side perpendicular to the rear panel and L.
The design of the door has an edge mounted on the housing to ensure that the panel is rigid and has a reasonable air tightness.
I used the edge about 30mm deep. (blue -
Inside panel, red-
Side panel, yellow-back panel)
The pipe clamp is made by welding two double-layer polycarbonate sheets together.
A whole is drilled with a hole saw, marking and cutting tangents with a band saw (
Also a hacksaw).
The distance between the 2 cuts and the diameter can be adjusted according to the diameter of the filament roll and the pipe you use in my case, I am using a pipe with an outer diameter of inches. The .
The stl file for the collar and the Inventor part file are attached below.
A total of eight holders are required.
When welding the pipe bracket to the side of the equipment, several pieces of polycarbonate are used as spacers to ensure that the bracket is fully aligned with the bracket on the other side.
The user can adjust the distance between the brackets according to the diameter of the rollers to be stored.
Make sure the distance is not too high and it doesn't fall off the space between the pipes.
To complete the 3d printing of the door handle (.
Attach stl file below
And cut a rectangular part on the sheet to ensure that the flange of the handle perfectly matches the surface of the door and weld it off.
Attach the door to a set of plastic hinges (for eg.
Adafruit part 1215-)using the .
The stl file is provided below, then the door is aligned to the shell and the hinge is screwed to the shell.
Then, push the pipe into the slot and place it firmly at the bottom.
3d print the desiccant tray and grill and install it in the lower cut of the inner panel.
Put the grill printed with the settings given below into the tray and put some desiccant.
Grill peripheral settings-3infill -
Top and bottom 20%-
There are four parts in this section.
Cross flow fan, 100 W heater, power supply and control unit (
Arduino and shield).
I used this picture.
The chemical etching method for manufacturing shielding mentioned in the next step, but any other process can be used.
After preparing the shield, install the part to Hylam (
The material is not important but not combustible and can withstand about 200 degrees. C)
As mentioned above, and make the connection, you can wire it by drilling under the sheets.
On the side of the case, make a cut for the AC socket and switch and install there.
Then connect the socket to the switch and connect the switch to the power supply.
Route the DHT22 sensor to the storage room and fix it there.
Check the connection and put the electronics back on the tray and you can go.
I added an RGB LED strip to the tray.
The code allows me to control the color and flash pattern of the strip to provide information about the status of the system and it looks cool as well.
You can customize the code or add effects as needed.
The heater is the PTC 100 W 12 v heater I got from Ebay.
Cross-flow fans are generally used for cooling amplifiers and other instruments that can be purchased online.
You can replace a 50 or 75mm CPU cooling fan if you want.
To make a shield using my method, print the artwork provided on the transparent paper and the printer is set to the darkest output.
Mark borders on a P sheet using artworkC. B.
Then cut profits.
Now clean the copper side with steel wool and fine sandpaper until you have a shiny surface (
Wearing rubber gloves, copper is poisonous).
After cleaning, make sure the sheets are dry and clean, and skim the copper surface with a paper towel soaked in alcohol.
Now take the sheets to the dark room.
Cut a part of the photo. polymer (Dupont Riston)
You have about the size of P. C. B. .
Laminate P now. C. B.
Use a polymer sheet and let it glue properly.
Use art to develop P after lamination. C. B. .
By exposing it to a UV light source.
You need to develop the motherboard using the manufacturer's advice.
You can also use pre-
Or make PCB using toner transfer method/CNC milling/anti-etching marking method.
After developing PC. B.
, Etching using etching agents such as HCL or fecl2.
After finishing the etching, clean P. C. B.
And trim it to the boundary.
Use Dremel or proxxon moto-drill holes for components
Tools on the support of the drill press.
Now weld the following components to P. C. B.
N-channel mosfet x5 10 k resistor x 6JST connector (for dht22)
The X1PCB terminal plug-in connector x5 test installs it on the arduino and uploads and tests the code.
The silicone desiccant designed using the deformation bacteria 8I changes from amber to dark green, so I know when to replace the desiccant.
Depending on the length of time the desiccant works, you may need to increase the volume or replacement interval of the tray.
In areas with very high humidity or in wet seasons, you may need to add a gasket sealing band to the door to make sure there is no moisture penetration.
The design may extend to the addition of the filament feed mechanism to ensure that you do not have to expose the filament roller to the air, but this requires a lot of rework to create the roller to allow free rotation.
You can use a Bowden tube to guide the filament off the shell from the back.
Arduino/shield alignment is useful for prototyping and can be replaced with custom boards using ATtiny or other Atmega processors on a custom PCB.
You can also connect a digital monitor to monitor the temperature/humidity values, and you can also install sound alarms for critical levels.
A web-based remote monitoring solution is also considered, but this will be left to another structure.