Soft Gripper Solution for Handling Lipstick Tubes at 40–60°C

In cosmetic manufacturing and packaging lines, lipstick tubes are among the most common products requiring automated handling. While they may appear simple, their small diameter, smooth surface, and elevated temperature after filling or molding present significant challenges for conventional grippers.For lipstick tubes with diameters ranging from 12.3 mm to 24 mm and surface temperatures between 40°C and 60°C, soft grippers provide a reliable, non-damaging, and highly adaptable automation solution.

1. Wide Product Size Variation

Lipstick tubes often come in different packaging designs and dimensions. A production line may need to handle products ranging from 12.3 mm to 24 mm in diameter, requiring frequent changeovers when using rigid grippers.Traditional mechanical grippers typically require:

• Multiple jaw sets
• Manual adjustment
• Precise positioning

This increases downtime and maintenance costs.

2. Elevated Surface Temperature

After molding, filling, or sealing processes, lipstick tubes can reach surface temperatures of 40–60°C.Common challenges include:

• Reduced friction on smooth surfaces
• Thermal expansion causing dimensional variation
• Risk of product deformation under excessive gripping force

3. Cosmetic Surface Protection

Lipstick packaging often features:

• Electroplated finishes
• Painted surfaces
• Gloss coatings
• Decorative labels

Any scratches, pressure marks, or surface damage can directly affect product appearance and market value.

Soft grippers are designed to adapt to product contours through compliant gripping surfaces.

Adaptive Gripping

The flexible fingers automatically conform to different lipstick tube diameters without requiring mechanical adjustments.A single gripper can handle multiple product specifications, reducing tooling costs and changeover time.

Large Contact Area

Unlike rigid grippers that apply force at a few contact points, soft grippers distribute pressure over a larger area.Benefits include:

• Stable handling
• Reduced risk of slipping
• Lower surface stress
• Better protection of cosmetic packaging

Temperature Tolerance

High-temperature silicone materials can maintain stable performance when handling products with surface temperatures up to 60°C.The gripping force remains consistent even during continuous production cycles.

Recommended Gripping Method

For lipstick tube handling, a two-finger soft gripping configuration is typically recommended.

Process Flow

1. Pick lipstick tube from conveyor or tray
2. Soft fingers conform to tube surface
3. Securely transport product
4. Place into packaging, inspection, labeling, or assembly station
5. Release without leaving marks

This approach accommodates minor positional deviations and reduces the need for highly precise product alignment.

As cosmetic manufacturers continue to pursue higher automation and greater product variety, handling solutions must become more flexible and product-friendly.For lipstick tubes ranging from 12.3 mm to 24 mm in diameter and operating at temperatures of 40–60°C, soft grippers provide an ideal balance of adaptability, product protection, and operational efficiency. By replacing rigid gripping methods with compliant soft gripping technology, manufacturers can reduce downtime, improve product quality, and simplify automation deployment across multiple lipstick product lines.