How To Make A Two Part Plaster Mold For Slip Casting

Two part cylinder mould for slip casting.

How to make a two part plaster mold for slip casting. The advantage of a two part mold over a one part where molten material is poured into an open mold is that much more structurally complicated objects can be duplicated in this way. There are several useful items you can use as a model for your cylinder. The beauty of slip casting is that you can make the forms much faster than you could do otherwise and you have the security of knowing that every item will be identical an important factor for some batch production. The flashing creates a barrier to contain the plaster once it is poured onto the prototype 3.

The extra slip is then poured out and you re left with a clay shell. This instructable shows how to make a two part plaster mold of a ceramic bowl or just about anything for that matter that can be used for slipcasting. Here is a short video showing how to make a down and dirty two piece mold of chicken bones. This tutorial is demonstrating how to slip cast porcelain in an already existing plaster mold easily and efficiently.

The plaster absorbs the slip s water leaving clay behind. Obviously i m not very professional when it comes to ceramics i m just out here having fun and doing my best. Thanks for watching y all. Recorded on april 11 2011 using a flip video camera.

For a tutorial on how to make a plaster mold please refer to the plaster mold making tutorial for more information. Another reason to use a two part mold is if you want to make a rigid mold of a model with undercuts i e. Slipcasting is a ceramic manufacturing process in which liquid clay a k a. There are many ways to do everything and in this video i will show you my way of making a two part plaster mold.

A plaster mold for ceramic slip casting because there is no give at all in the material you must find the part line of the shape that will allow the two mold pieces to pull apart and the model or cast to be released free of undercuts. How to make a plaster mold for slip casting part 2. Once the base of the flashing is sealed with a coil of wet clay plaster. To demonstrate the process for the instructable i have chosen a sea shell since it is an object that cannot be duplicated with a one part mold system but is very streamlined it lacks advanced features such as.

Wrap aluminum flashing around the prototype to serve as cottle boards leaving a 1 2 inch gap between the flashing and the edge of the clay form. Something to use as a model. Slip casting can be useful for making multiples of one object and to make casts that are hollow on the inside.