Factors affecting the quality of silicone buttons of automobile fault diagnosis instrument

Causes and solutions for cracking of silicone buttons

1.Material formulation and hardness control

The hardness of silicone is determined by the ratio of cross-linking agent and catalyst in the formula, which directly affects the elasticity and durability of the silicone keypad. Improper formula may lead to too high hardness (poor feel, hard to press) or too low hardness (easy to deform, key stuck).

The purity of silicone materials and additives (such as anti-aging agents) will also affect the performance. Poor quality raw materials can easily lead to poor toughness and easy breakage. 682 Processing parameters

The vulcanization process is the keypad: insufficient vulcanization time or too low temperature will lead to insufficient cross-linking density of silicone, and the product will easily stick to the mold and crack during demoulding; too high temperature will lead to insufficient cross-linking density of silicone.

The pressure during the molding process and demolding operations (such as improper mold design or operation) can also affect the integrity of the keypad structure.

Design and use environment adaptability

The shape and size of the silicone buttons must be ergonomic to avoid key jamming or uneven force due to improper clearance or unreasonable structure.

Environmental factors such as high temperature, humidity, and ultraviolet rays can accelerate the aging of silicone, causing the surface to become fogged, brittle, or cracked.

Conductive function realization process

If conductive silicone buttons use conductive black particles or ink technology, attention should be paid to the vulcanization temperature of the black particles and the freshness of the rubber material, otherwise they are prone to falling off or deformation .

Causes and solutions for cracking of silicone buttons

Causes of rupture

1.Defects in materials and workmanship

Incomplete vulcanization: Low cross-linking density results in insufficient material strength, which is prone to breakage when subjected to stress.

The molding temperature is too high: the silicone becomes brittle and easily breaks during demoulding.

Poor quality raw materials: impurities or unbalanced additive ratios, reducing toughness

●Design and Operational IssuesUnreasonable mold design: improper demoulding angle or rough mold surface, resulting in demoulding difficulties or local stress concentration

●Improper operation: Excessive force during demoulding or failure to use a release agent can cause mechanical damage.

●Environmental and usage factors

Long-term exposure to high temperature, ozone or chemical corrosion environment will cause the silicone molecular chain to degrade.

Improvement Methods

Optimizing production processes

Adjust vulcanization parameters: extend the vulcanization time, control the mold temperature (it is recommended to refer to the material supplier's parameters)

Use high-quality raw materials: choose high-purity silica gel and add anti-aging agents to enhance weather resistance

Improved mold and operation

Optimize mold design: increase the demoulding angle and use internal release agent to reduce the risk of mold sticking.

Standardize the operation process: Train workers to operate according to the operating instructions to avoid violent demoulding. Enhance environmental adaptability

Add anti-UV agent or anti-ozonant to improve the stability of silicone in harsh environments. Repair and maintenance

Slight cracking: Use special silicone glue (such as 3M) to bond and apply film to the surface for protection.

Severe damage: Replace the key assembly or metal spring sheet (if it involves conductive function).

Changmai Technology Customized Service

Among many silicone keypad suppliers, Changmai Technology stands out with its professional customization services. Providing customers with high-quality, personalized silicone keypad product solutions to meet the diverse needs of different customers.

Service Features

●Professional design : Changmai Technology has a professional design team that can provide customized design solutions according to customer needs to ensure that the product meets both functional requirements and has aesthetics.

●High-quality raw materials : Select high-quality silicone materials as production raw materials to ensure that the physical and chemical properties of the product are in the best state.

●Precision Manufacturing : Introduce advanced production equipment and technology, implement strict manufacturing process to ensure product accuracy and quality.

●One-stop service : From design, production to sales, we provide a full range of service support to save customers time and energy.

●Quick response : We have a professional customer service team that provides 7x24 hours online support to ensure that customer issues are resolved in a timely manner.

For more information, please contact: https://www.cmaisz.com/