how to make liquid silicon mold

how to make liquid silicon mold

1 Prepare a smooth wooden board (If an rough one, we should make it be smoothly.)

2 Cut the wooden board and vacuum tank at proper size. Cling the original mold to the vacuum tank with 502 glue, then adhere it to the board. (The volume of vacuum tank should be larger than or equal to the size of the original mold)

3 Use the soap water to clean the original model with a soft brush.

4 Notice: After cleaning, please dry the mold by air gun.

5 Prepare cardboards or wooden boards (the size of the board is depends on the size of original mold).

6. Fix the cardboards or wooden boards by Melt gun 3mm away from the vacuum tank.

7. There is no need to make an external mold for the flat mold since it is easy to demould. Please make sure that the standing board and the below plate meet at an right angle.

8 Seal up the little gap between the boards by Melta.

9. The mold ( like large molds and those need mold line when demoulding ) is required a plaster or resin external mold to fix it, so we should cut the cardboard or the wooden board in a slope line and make the board frame a bell shape for the convenience of taking the external mold off easily.

10 Prepare the right amount liquid silicon according to the size the of mold, and mix it evenly with the curing agent at the mixing ratio of 100 : 2 under room temperature 25°C.

11 Pour 1/3 mixed silicon into the mold frame

12 Then take the mixed silicon to de-air. (The standard is subject to the manometer shows- 0.1).

13 Take out the remain de-aried silicon and pour it into the mold frame.

14 Notice: The thickness for silicon covering the original mold should be 5MM around.

15 Remove the cardboards or wooden boards after the silicon is totally cured in about 4 hours.

16. Shave the fringe with razor blade.

17 Having been shaved, the mold is completed, and the mold can be used after 8 hours.

Any questions of making molds, please feel free to contact Kaimi:

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