Laboratory Three Roll Mill for Cosmetic Lipstick Paste

Laboratory Three Roll Mill for Cosmetic Lipstick Paste

Shanghai Qimeida Machinery Technology Co., Ltd. designs and builds this compact three-roll mill for cosmetic laboratories and small-batch production lines. As a Laboratory Three Roll Mill for Cosmetic Lipstick Paste manufacturer, we focus on wet refining of creams, pastes, and powder slurries used in color cosmetics. The machine delivers reproducible particle size reduction for formula development, pilot runs, and pre-production sampling.

Our engineering team configures each unit around your specific slurry rheology, target fineness, and batch volume. We supply the mill as a standalone benchtop unit or as part of a larger R&D line, with installation support and process advice from our Shanghai factory.

Machine Overview and Key Specifications

The mill uses a fixed-speed three-roll design to generate high shear between rolls of different rotational speeds. The cast iron body with painted finish provides stable operation on any laboratory bench.

Application Fit for Cosmetic Formulations

This three-roll mill is designed for wet refining of viscous cosmetic systems. Typical applications include:

• Lipstick and lip balm pastes – dispersing pigments and waxes uniformly.
• Foundation and concealer creams – breaking down pigment agglomerates for smooth application.
• Eyeshadow and blush creams – refining powder slurries before filling.
• Nail polish and gel bases – achieving consistent color development.

The 125 mm roll length suits batch sizes typical of laboratory trials and small-scale production. For higher throughput, we offer larger three-roll mills and can integrate them with our semi-automatic 30L lipstick filling machine to form a complete pilot line.

Process and Operating Principles

The slurry is fed between the slow and middle rolls, then transferred to the fast roll where it is discharged via a scraper blade. The differential speed creates shear forces that disperse pigments and reduce particle size. The roll gap is adjustable to control fineness and throughput.

For most lipstick pastes, three passes achieve the target 3–18 μm range. We recommend starting with a wider gap and gradually reducing it to avoid over-shearing temperature-sensitive waxes. The machine is not designed for dry grinding or materials with abrasive particles that could damage the roll surface.

Installation, Safety, and Maintenance

Installation Requirements

• Stable, level benchtop with clearance for material feed and collection.
• Reliable grounding and a dedicated 2-phase 220V/50Hz outlet.
• Ambient temperature 10–40°C, non-condensing humidity.

Safety Precautions

• Never operate with the safety guard removed.
• Keep hands and tools away from rotating rolls.
• Disconnect power before cleaning or adjusting the roll gap.

Maintenance Schedule

• Clean rolls and contact parts immediately after each use to prevent residue curing.
• Check roll gap alignment weekly.
• Lubricate bearings and inspect electrical components monthly.
• Replace scraper blade when worn to maintain discharge efficiency.

We provide a detailed manual with each machine and offer remote video support for troubleshooting.

Quality Assurance and Acceptance

Each mill is test-run at our factory before shipment. We verify roll speed, gap adjustment, and electrical safety. The machine is shipped with a certificate of conformity and a one-year warranty on manufacturing defects.

For customers integrating the mill into a larger line, we coordinate with our other equipment such as the Cosmetic 50kg Wax Melting Tank to ensure consistent upstream paste preparation.

Information We Use to Configure Your Solution

To prepare an accurate quotation and process recommendation, please provide:

• Formulation type (e.g., lipstick, foundation) and main components.
• Viscosity and rheological behavior at processing temperature.
• Target particle size and acceptable range.
• Batch size and desired throughput per hour.
• Power supply specifications (voltage, phase, frequency).
• Any special requirements for temperature control or explosion-proofing.

Our engineers will confirm the appropriate roll gap settings, number of passes, and any optional accessories such as a heated hopper or scraper blade material.

Frequently Asked Questions

Q: What is the typical particle size after one pass?

With a properly adjusted gap, one pass typically reduces particles to 20–30 μm. Three passes are recommended to reach the 3–18 μm range for most cosmetic pastes.

Q: Can this mill handle water-based or oil-based formulations?

Yes, the mill is suitable for both water-in-oil and oil-in-water emulsions, as long as the viscosity is within the range that can be fed between the rolls. Very low-viscosity liquids may require a thickening agent.

Q: How do I clean the rolls between batches?

After stopping the machine, remove the scraper and wipe rolls with a soft cloth and appropriate solvent. For oil-based products, a mild solvent like isopropyl alcohol works well. Ensure the rolls are completely dry before the next run.

Q: What is the lead time for delivery?

Standard models are typically in stock and can ship within 7–15 days. Customized configurations may take longer. We confirm exact lead time with your order.

Q: Do you provide installation and training?

We provide remote installation guidance and video training. For larger orders, on-site commissioning can be arranged. Our support team responds within 12 hours to inquiries.