How to solve the problem of difficult demolding of silicone products?

How to solve the problem of difficult demolding of silicone products? Silicone products are widely used in industries such as medical, food, electronics, and automotive due to their excellent high temperature resistance, aging resistance, environmental friendliness, and non toxicity. However, difficulty in demolding is a common problem encountered by many silicone product manufacturers and users during the production process. Difficulty in demolding not only affects production efficiency, but may also lead to product damage or mold wear.

Reasons for difficulty in demolding silicone products
The surface of the mold is rough
The surface of the mold is not smooth enough or has scratches, which increases the friction between the silicone and the mold, making demolding difficult.
Improper use of release agent
Inappropriate selection or uneven application of release agent cannot effectively reduce the adhesion between silicone and mold.
Silicone material issue
Inappropriate hardness, viscosity, or vulcanization time of silicone materials may lead to difficulties in demolding.
Unreasonable mold design
Complex mold structure or improper design of demolding angle can increase the difficulty of demolding.
Improper vulcanization temperature and time
Excessive vulcanization temperature or time may lead to excessive curing of silicone, increasing the difficulty of demolding.

The method to solve the difficulty of demolding silicone products
1. Optimize the surface treatment of molds
Polish the surface of the mold to ensure it is smooth and scratch free, reducing the friction between the silicone and the mold.
For complex molds, electroplating or coating techniques can be used to further improve the smoothness of the mold surface.
2. Proper use of release agent
Choose a suitable release agent for silicone products, such as water-based release agent or oil-based release agent.
Apply release agent evenly to avoid excess or insufficient. Excessive use may result in surface residue on the product, affecting its appearance; If it is insufficient, the demolding effect cannot be achieved.
3. Adjust the silicone material
Select the appropriate silicone material according to product requirements, ensuring its hardness, viscosity, and vulcanization time are moderate.
For high viscosity silicone, an appropriate amount of diluent can be added to reduce its viscosity and facilitate demolding.
4. Improve mold design
Optimize the mold structure and minimize complex shapes and deep cavity designs as much as possible.
Reasonably design the demolding angle, usually recommending a demolding angle between 1 ° -3 ° to reduce demolding resistance.
5. Control the vulcanization process
According to the characteristics of silicone material, set the vulcanization temperature and time reasonably to avoid excessive curing.
Use a temperature control system to ensure temperature stability during the vulcanization process.
6. Use auxiliary demolding tools
For large or complex silicone products, tools such as demolding pliers and demolding air guns can be used to assist in demolding.
Design a ejector pin or ejector device in the mold to assist in the smooth demolding of silicone products.

Difficulty in demolding silicone products is a common but solvable problem. By optimizing the surface treatment of molds, using release agents correctly, adjusting silicone materials, improving mold design, controlling vulcanization processes, and using auxiliary release tools, the difficulty of demolding can be effectively reduced, and production efficiency and product quality can be improved.