Make a Food-Safe Silicone Mold from 3D Printed Object

  • Thread starter Thread starter LightningInAJar
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around the challenges of creating a food-safe silicone mold from a 3D printed object, focusing on the properties of silicone materials, particularly their viscosity and the need for vacuum assistance to eliminate air bubbles. Participants explore alternatives that might allow for easier handling and application without the necessity of specialized equipment.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant describes difficulties with Smooth-on's Sorta Clear 37 silicone, noting its thickness and the requirement for a vacuum chamber to remove bubbles, and questions the possibility of a thinner, food-safe silicone that does not require vacuum.
  • Another participant suggests exploring other thinner silicone products available for hobbyists, proposing that a thinner material might mitigate bubble issues and that a longer working time could be beneficial.
  • A suggestion is made that a vacuum cleaner could be used for initial trials, although caution is advised regarding its limitations for maintaining a vacuum.
  • One participant expresses a strong preference against purchasing a vacuum chamber and pump, indicating a lack of further use for such equipment.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to creating a food-safe silicone mold without vacuum assistance, and multiple competing views on the use of different materials and methods remain present.

Contextual Notes

Participants mention the potential need for safety considerations regarding the vacuum container and the limitations of using a vacuum cleaner for maintaining a vacuum.

Who May Find This Useful

Individuals interested in DIY mold-making, particularly those focused on food-safe applications and exploring alternatives to traditional silicone molding techniques.

LightningInAJar
Messages
274
Reaction score
36
TL;DR
Are certain materials possible?
I tried using Smooth-ons Sorta Clear 37 silicone material to try to make a mold from a 3D printed object. It is very difficult to work with. Super thick (thus hard to measure and pour) and really requires vacuum chamber and vacuum pump to remove gas bubbles. Is there any conceivable way to create a food safe silicone material that starts much thinner and doesn't require a vacuum? Personally don't care if it requires a much longer cure time or more than 2 parts.
 
Chemistry news on Phys.org
I don't know about food grade products, but you could shop around for other, thinner products that might fit your bill. There are lots of products for hobbyists. A sufficiently thin bunch of chemicals might not have the bubble problem.
A longer working might be helpful.

Being able to draw a vacuum on your materials is really helpful. But I don't think it has to be a very strong one. The lower pressure makes the bubbles larger so they float up and pop.
A cheap hand vacuum pump would probably suffice or a vacuum drawn by a venture valve.
You will need a container large enough for your product that won't implode. This is a safety issue.
 
You may be able to use a vacuum cleaner for initial trials.

(They even work great for collapsing inflatable beds and air mattresses. Just don't use them to maintain a vacuum, the motors burn up without the airflow.:doh:)
 
  • Like
Likes   Reactions: BillTre
I absolutely do not want to buy a vacuum chamber and pump. There would be no other application afterwards for those things.
 

Similar threads

Replies
6
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
4
Views
2K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 1 ·
Replies
1
Views
4K