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Good morning, I have been tasked with exhausting more cfm (adding new equipment) to an already installed industrial exhaust fan that is going to an RTO here at our plant. I have been told that the capacity of the fan is 15000 ACFM. As I try to eliminate hoods and other not necessary air...

Between my company and the molder we have the origimal 3D mode Can I creat a 3D model via stwp, or ides, or something to generate a model? Or could I use the current mold moldels to creat a part with boolean operations? Thanks Sid

Afternoon all, Forgetting friction and air leaks. Theoretically, if I have an air manifold that has one input port(2") and five output ports(1"), if I put say 500 cfm into the input port, I know my velocity will be higher on the outputs due to smaller diameter, but will I divide the input...

Good morning all, I have been tasked with creating a containment system for our piping run that transports Quilon C (Release agent) in solution of IPA from a large storage tank outside to inside the plant. The 1" piping is currently a chemical grade polypropylene over an approximately a 150yd...

Afternoon everyone, I have been tasked with revamping our old and outdated resin conveying system from the rail cars to the extruder. 2 separate systems in parallel. We currently use a vacuum pump to suck the pellets from the rail car through a cyclone for filtering from the rail car to...

Afternoon all, I have used std. ever so slightly in the past to makwe rudimentary piping diagrams with a few valves and vessels sprinkled in. Here at my new place of employment, I am the newly hired reliability engineer responsible for all equipment, new and old. Unfortunately, the old...

Afternoon all, I have a liquid ring vacuum pump that is pulling 17in/Hg. I exhaust into a separator tank. But the exhaust from the separator tank needs to be scrubbed before it can go outside. My scrubber mfr. needs to know the flow rate of the exhaust. Can I calculate that without having...

Good morning all, We have a large metal box/hopper, 20' X 20' X 10' deep that we accumulate a mixture of natural blocks of masticated rubber, resin, calcium carbonate and a few different powdery fillers. This is a feed to more aggressive screws below before we extrude out adhesive. The bottom...

Good morning all, I apologize if this is not the correct forum as IO am new to rubber processing. We are dosing rubber pellets that have been treated with CaCO3(Calcium carbonate) into the back end of a long dual screw extruder. We put different amounts of K100 resin in at different points in...

Good morning all, I am working with a new scrubbing system to me. The previous system people are no longer available, so I am left to figure this out for myself. I'll try to make this as clear as possible. I am also attaching the oem pump curves as well. I am sucking nasty hot (130F)...

Afternoon all, I am putting together a PPAP for my molder and as part of that PPAP, I am to request of them a filled out compliance matrix. Does anyone have an example compliance matrix with plastic part requirements I may look at please? I mean other than some simple snap fit checks of the...

Afternoon all, I have a NORYL plastic piece with a .070 thick wall. This is a cosmetic surface on one side opposite of where the inserts will heat staked or vibrated in from. I am following the insert manufactures recommendation for wall thickness around the insert. Thing is at the base of...

Morning all, Well the design is done. Prints are made with all critical dimensions, inspection dimensions, and surface textures called out. I am trying to get a first article inspection form together for our first batch of parts to be recived here in a couple of months from the molder. I...

Morning all, I have a plate plate that will be molded out of PC/ABS(Cycoloy). This part is approximately 10 " long x 5.5" wide and .10" thk. This is a cover to a battery box that has 8 even spaced countersunk holes around the perimeter of the piece. The are two pieces of text that are raised...

Good afternoon, I am designing an injected molded part and am working on the core side of the part. I have a call out to my molder about this question but wanted to ask for another opinion while I wait for him to return my call. I have a pocket that is formed by a wall and a few ribs. After...

Good morning all, I am presently finishing up a plastic part design and its been sometime since I applied draft via my CAD package. Is it advisable to apply draft to features from the same draft reference or neutral plane no matter where the features lie in reference to that plane? Thanks...

Morning all, First time poster here. I am a new employee here at my company and will be visiting a new mold house to go over plastic part design and moldflow with them. I have been asked by my company to make sure they can and will adhere to SPI tolerancing for our part prints once they...