Paulson Training – Extruder Operation & Control: Single Screw
November 20th, 2010 | 
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This video is an exerpt from our Extruder Operation and Control – Single Screw: Lesson 1 course. This program uses state-of-the art animation technology to teach the fundamentals of single screw technology, including parts and operation, plastics used for extrusion, extruder controls, safety procedures, troubleshooting and more. Also available in Spanish. Paulson Training Programs – Complete Training Solutions for the Plastics Industry. Visit www.paulsontraining.com for state-of-art plastics training, including interactive CD-ROM and online training.
Video shows the process construction of the RTM Light mold the manufacture of the piece.
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You can turn it off then set a time to heat again. You have to set 2 hours to run again for production.
What happens ive you once pushed plastics through it and then turn it off till its cold? Can it start then or what do you do?
thanks for the video. nice one.
nice video…gives a good explanation of the single screw extruder.thanks
EXCELENTE !! IRMAOS BRASILEROS!!
Muy ilustrativo, gracias por compartirlo,lo tomare de ejemplo.
What was the original plug made from?
this is cool
@baxo70 thats good information thanks to much bro love brazil also
@daniel12181961 Exactly!
@linearstar No problem handling fiberglass blanket. You must wear gloves and mask and goggles when handling resins.
@robotmotor Use soft bristle brush and apply a second coat after the first polymerization.
Greetings from Brazil!
@deepak762 Only the name.
Very very nice mold. But ARE SERIOUSLY touching the chopped glass with your bare hands and with no mask!!
please help i use gelcoat but he leave brush marks ? when i apply it !
@deepak762 your resin hopper is pressurized at one end as well as
vacuum assisted at the other.
it’s a push pull effect
what is difference between Light RTM and VARTM process?
@JustWonderingHowToDo The inner part is used a silicone ring seal type and is used outside a conventional rubber type wing.
At 5:16 min in the video. What type of gasket is used to seal to blue top half of the mold to the red one underneath so you can make a vacuum?
@baxo70 yes! also the gelcoat is made in epoxy resin! i wait that the gelcoat end his pot life and after i made all the infusion process… When i demolded the part, i see 10000 pinholes incapsulated under gelcoat situated between junctions of the carbon filaments! i must say that in the last tests i don’t degass the resin that after i infuse… can be this the problem? thnx
@shkssj88 Ok, and one question? when using epoxy resin the gelcoat is also epoxy?
@baxo70 no.. the problem is that i have a good finiture with polyester resin and not with epoxy resin! in every case i use gelcoat..
@shkssj88 yes! Using polyester resin can not use a vacuum greater than – 0.65 bar because there is the formation of microbubbles caused by separation of the styrene resin.
@baxo70 you say to use a vacuum under or over -0,65bar? because in this moment i use -0.91bar
@shkssj88 Hi, perhaps the problem is to use a vacuum up to -0.65 bar
Greetings from Brazil!
@beachnative420 Proval problem of sealing film on the side of the mold. this fence has to be perfect to avoid the occurrence of air bubbles. The vacuum must also be controlled to a maximum of -0.65 bar. Above this level there is the removal of styrene resin.
@leparditas Not plastic, but a superior cast composites
@madamepo Sorry, but this boat and I developed this scale 1 / 20 and is exclusive of the courses that I do.
Greetings from Brazil
@baxo70 yeah. It wasn’t perfect though. The gunwhales sometimes has air bubbles near the edge..but it was still a heck of a lot faster than regular lay up using a chop gun.