food grade silicone moulds wholesale

2 Part Silicon Mold Making

Steps in creating a Two portion silicon mold

Sometimes called a two piece block mould, this type of food grade silicone moulds wholesale making involves enclosing your design in silicon as you would with a one piece block mold. The various with two piece block molds is that you create often the mould in two parts.

Models that have detail upon all sides instead of a flat back require this form of si mold making.

(1) Choose a molding box which suits your model and will allow for the silicon to pour about it. For small pieces this can be a simple plastic container present in any $2 shop or a wood base on which you are able to build a box wall surround made of Lego blocks, Perspex, mat board or something similar.

(2) Draw the half way line around your model with an producer pen to show the parting line position of the 2 halves of the mold. Using a non-hardening modelling clay introduce your model up to this line in

the mold package. Make sure the clay is formed right up close to the model as well as mold box walls so the silicon doesn't leak.

(3) Push a few indentations into the clay around your type with the round head of a pencil, or something similar to face the registration keys that will enable both halves of the black mold to fit together exactly.

(4) Press a small plastic conduit about as thick as a pencil halfway down into the exact clay at the head or base of the model to act like a feeder channel for the casting medium. Make sure the tubing is closely touching the model and the wall.

(5) Using wax or petroleum jelly, coat the clay surfaces, model and the mold box walls to prevent the silicon from sticking.

(6) The silicon mold making rubberized can now be mixed being careful not to beat any air flow into it.

Pour into the mold beginning at the lowest aspect from as high a position as you can manage. This really thin stream of silicon mold making rubber has got the effect of breaking any air bubbles that may be in the blend.

(7) Wait for the silicon mold making rubber to cure.

(8) Remove the model and the half poured silicon mold through the mould box. Turn the mold over and remove the clay courts.

(9) Now put the half completed mold back into the very mold box. Make sure the completed side of the pattern goes in first. Seal any cracks between the silicon and also the box wall with clay. Coat all surfaces from the box, silicon and model with wax or oil jelly release.

(10) You can now mix and pour the rest of the half of the mold in a similar way to the first half. Let the si mold making rubber cure.

(11) Remove both halves of the mold from the mold box and separate. Make model and pouring channel tube out of the rubber. Cut any flashing from the mold.

(12) Put both items back together ensuring the registration keys made with the pen are locked firmly together. Secure both halves having a rubber band or tape.

(13) Now mix your own casting material and pour a small amount into the mould. Prevent off the pouring hole with your finger and rotate the main mold to let the material run over all surfaces in the mold. Continue pouring the casting medium, tilting the mildew occasionally to permit air to escape.

Note: Small air stations can be cut into the silicon mould halves if you find you will find any undercuts or areas not covered by the moderate. When you notice casting medium coming from these channels just plug with clay and continue pouring.

(14) When the resin has set, open the mold. Remove the throwing which will be a faithful reproduction of the original model. Any kind of flash or extra casting material from the casting station can be cut off and sanded. If trimming is remaining to do when the model is fully cured you will have trouble cleaning the casting.