Piscivorous Pike Posted May 5, 2009 Report Share Posted May 5, 2009 (edited) I built and injector using plumbing parts and mentioned it in another thread, it was small, http://www.tackleunderground.com/forum/soft-plastics/14384-plastic-injector.html post #5. There is a picture of it in that post, sometimes it does not down load though. I found that vacume injection, that is sucking the hot plastic into the mold worked better for me than my injector. http://www.tackleunderground.com/forum/soft-plastics/15350-injection-system.html#post113912 post #7 Then I saw a pro's injector and I modified a bicycle pump by cutting it down and adding a bell reducer and nipple. It worked! The pump "inhales" by using a cut in the rim that supports the O-ring seal on the up stroke. I simply applied silicone glue to the cut outs. Then I found an already made injector for $10 at an auto parts store. I found my new injector again at Harbor Freight for $4.99, in this add it is $5.99. - Harbor Freight Tools - Quality Tools at the Lowest Prices This works well with my two piece molds. Both top and bottom caps unscrew. It cleans out easy. I can fill it by sucking up hot plastic or hold it upside down and take the nozzle end off and pour in a cup full and put the nozzle back on. Wear gloves. I kept a piece of the tubing just on the nozzle to avoid chipping my DWP molds. To that one and the bicycle pump I added to the plunger a piece of butyl rubber, a truck tire inner tube, as a heat shield as these tubes are made to handle high heat. Both plungers have center nuts, I punched a hole into a piece of the rubber and put it on the plunger and then trimmed it to the plunger with a scissor. The skirt is a heat shield. Likely it does not even need this precaution, I added it without trying without it. I finally found a method to fill in the tight and fine detail in some of my molds. I do not know if you can get this gizmo up to production standards, but my stuff is for the fish and it suits me well. When I used vacuum injection, I used a large shop vac connected to the mold in order to get the fine detail filled. The inector does that but for safety, wear protective clothing and eye protection. It is so easy to get the plunger stuck if the plastic get too cold or you block the outlet then it gush out all over. Plastic splattered all over reseambles some modern art displays. Maybe the art will bring the cash so I can make more baits? Edited May 5, 2009 by Piscivorous Pike Quote Link to comment Share on other sites More sharing options...
