Prateek Posted September 19, 2020 Report Share Posted September 19, 2020 Dear All, I need to understand how to make the moulds for a jigger jolly machine. Please could anyone share tips, books, links, that'll be great. Link to comment Share on other sites More sharing options...
Mark C. Posted September 19, 2020 Report Share Posted September 19, 2020 Molds for any jiggering machine are all about the same. The bottom mold is keyed to fit the spining head. The top of machine is usually a plexigalss or metal or wood edge that cuts the clay the outer shape.. You can pour the lower half and while its setting you can cut its shape on the machine with a edge you make to get the inner form you like. Hope this is clear enough. I do not have a jigger but have been around them. so for. plate as an example the lower mold is the inner plater shape with the cutting edge making the outside and foot on bottom. The inner form is paster the cutting upper edge can be plastic or wood or metal. wood wears fast so make it out of a hard wood for jig top-plexiglass is better I think to use. Link to comment Share on other sites More sharing options...
oldlady Posted September 19, 2020 Report Share Posted September 19, 2020 prateek, if you have access to the book "The Potter's Dictionary of materials and techniques" jiggering and jolleying are described in only two paragraphs with two drawings. not much help but someone else might know another source. Link to comment Share on other sites More sharing options...
PeterH Posted September 19, 2020 Report Share Posted September 19, 2020 Thin pickings: Jiggering in https://ceramicartsnetwork.org/wp-content/uploads/sites/6/2015/06/Ceramics_Monthly_oct85_cei1085d.pdf P16- in thesis https://scholarworks.rit.edu/cgi/viewcontent.cgi?article=2470&context=theses If you have access (I don't) Mold Making for the Jigger by Bill Campbell Ceramics monthly June/July/Aug 1987 Link to comment Share on other sites More sharing options...
Prateek Posted September 20, 2020 Author Report Share Posted September 20, 2020 @Mark C. @oldlady Thanks a lot for the reply, really appreciate the help. @PeterHThanks a lot for the links. I think they completely solve my problem. I only need to start trying now. Thank you all again. Link to comment Share on other sites More sharing options...
PeterH Posted September 20, 2020 Report Share Posted September 20, 2020 @Prateek And another one, making a jolly mold in https://pureandsimplepottery.com/pages/jiggering Looks fun but messy Link to comment Share on other sites More sharing options...
Prateek Posted April 25, 2021 Author Report Share Posted April 25, 2021 Hello everyone, Greetings again and I really hope everyone is doing well during these trying times. Since last September I have managed to make few attempts at making moulds and templates, but of course I am facing some issues. Any help would be great. My moulds are not coming out clean from the inside. There seems to be lines, which I think is coming from the semi hard plaster which is stuck to my templates while I am moulding. No matter how much I clean the templates there still seem to be roughness in the mould. I am not sure the reason, but can the bevel of the template cause this? I am using a 8mm plexiglass as a template and have manually sand papered the bevels. Not sure how much of a slope am I supposed to give. I had to sandpaper the mould again once it dried but still not completely smooth. I am facing the same when I am shaping the clay. Thanks in advance. Link to comment Share on other sites More sharing options...
Jeff Longtin Posted April 27, 2021 Report Share Posted April 27, 2021 Basically, what you want to do, is "burnish" the surface of the plaster. (Easy to describe but hard to put into practice.) After you've created your basic shape you let the plaster set. (A little bit.) You remove excess plaster from the form and from the template. You then apply a SECOND coat of plaster, this time very liquid, and drop the template. This second coating will fill in the "lines" (low spots) and you will start to see smoothness. This second coat will also dry very fast, hence a thin state, so you have to pay close attention. If you press the template down too hard you may get chattering so you need a gentle touch. You may, MAY, need to apply a third coat, and repeat the above steps, to get the smoothness you're looking for. The key to this method is timing. Everything happens very fast and you need to watch the plaster. Old plaster may set very quickly so you need to work fast while new plaster may give you time to think and adjust. Link to comment Share on other sites More sharing options...
Ether Ceramics Posted June 5, 2021 Report Share Posted June 5, 2021 Finally created an account just to say thank you to the community for the awesome resources provided here! I've been struggling with the same questions as Prateek for a while now and the answers provided here were incredibly valuable. Thank you thank you! Blessings, Mathew Link to comment Share on other sites More sharing options...
Prateek Posted June 5, 2021 Author Report Share Posted June 5, 2021 Hi Mathew, it took some trials, but I managed to make a template for a bowl and a dinner plate out of a 8mm plexiglass glass. I made some moulds too, (its not as easy as it looks, for a newbie, of course, but works once you get a hang of it). Ill switch to a metal template once I know the plexiglass glass designs work fine for me. Thank you everyone for sharing the information. Really made things easy. Link to comment Share on other sites More sharing options...
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