South Africa Client Case – 500 L Sigma Mixer for High-Viscosity Adhesive Putty Production

1. About the Client

 

Accent Manufacturing (Pty) Ltd is a well-established adhesive-putty manufacturer located in Park Rynie, approximately 50 km south of Durban, South Africa. Since 2000, the company has specialized in producing high-viscosity adhesive putty for the construction and consumer markets. With Durban being one of Africa’s largest and most active shipping ports, Accent Manufacturing enjoys ideal access for exporting their products to regions across Southern Africa, the Middle East, and Europe.

 

Over the past two decades, Accent Manufacturing has built a strong reputation based on stable product quality, advanced production standards, and a long-term vision of becoming one of the most respected adhesive-putty producers worldwide.

 

2. Project Background

 

In 2024, Accent Manufacturing planned to expand their production capacity as demand for high-viscosity adhesive putty increased. Their existing mixers were no longer sufficient for the volume or viscosity of the materials they needed to process. They began searching for a more powerful mixing solution capable of handling tough butyl rubber blocks—a critical raw material in their formulations.

 

After an initial discussion, the client informed us that they required:

 

One 500 L Sigma Mixer

 

One 1000 L Sigma Mixer (planned for phase 2)

 

The initial purchase would focus on the 500 L mixer, with the decision for the 1000 L unit to be made after evaluating the performance of the first machine.

 

3. Understanding the Material Challenge

 

During the first stage of communication, the client shared videos of their butyl rubber blocks—solid pieces approximately 15 cm in diameter and extremely tough. These blocks must be crushed before they can enter the secondary mixing phase.

 

This created several engineering challenges:

 

 

High starting torque

Strong blade structure

Heavy-duty gearbox

Reinforced drive system

Durable bearings capable of handling high-load shocks

 

Our engineering department carefully reviewed the videos and asked the customer for:

 

Close-up photos of the butyl blocks

The exact grade of the butyl rubber they were using

Mixing temperature

Required batch time

Viscosity range

 

The customer provided detailed images and rubber-grade information. After analysis, our engineers confirmed that the Karvil 500 L Sigma Mixer could fully meet the material requirements. We also recommended several technical adjustments to ensure long-term durability, such as:

 

Strengthened blade thickness

Higher torque gearbox

Upgraded motor power

SS304 or carbon-steel options depending on wear resistance

 

 

4. Selecting the Right Discharge Methods

 

Because adhesive putty is sticky, difficult to clean, and naturally high in viscosity, we recommended the tilting discharge design.

 

The customer agreed, as this structure offers major advantages:

 

Faster discharge

Much easier cleaning

Less material residue

Safer and more direct operation

Reduced labor needed for scraping the tank

 

This design is widely used for adhesives, silicone, sealants, and high-viscosity materials.l.

 

 

 

 

 

5. Customer Concerns and Internal Evaluation

As part of their procurement process, Accent Manufacturing asked a very direct question:

“Are you a manufacturer or a trading company?”

 

We explained clearly:

Karvil Machinery is the direct manufacturer of Sigma mixers

All mechanical parts, fabrication, assembly, and testing are done in-house

We can customize components quickly according to material requirements

We provide direct engineering support and lifelong technical assistance

This built trust and allowed the conversation to move into deeper technical validation.

 

6. Technical Questionnaire from the Client

The customer then prepared a detailed technical sheet containing more than 20 questions, covering:

Motor brand

VFD brand

Reducer brand

Bearing types

Blade material

Weld quality standards

Electrical components (Schneider/Siemens options)

Heating options

Safety switch design

Insulation materials

Control cabinet layout

Discharge valve design

Cleaning access

Gearbox torque rating

CE compliance

Stainless steel certificates

Noise level requirements

Machine weight and footprint

 

Our team prepared a very thorough response with:

A full technical reply to every question

CE certificate copies

Material certificates

Photos of internal structures

Layout drawings

Motor & reducer data sheets

This step gave the customer complete transparency about the machine.

 

 

 

 

7. Pricing Discussion and Discounts

 

After receiving all technical information, the customer asked:

“Can you offer a discount if we buy both 500 L and 1000 L?”

We explained our policy honestly:

3% discount for the 500 L mixer

5% discount if the customer could provide a purchase plan for the 1000 L mixer

The customer appreciated the clarity.

We also suggested arranging a video meeting with our engineer to answer any remaining technical questions. The client agreed and said they would finalize their technical checklist first.

 

8. Final Decision

In the final stage of discussion, Accent Manufacturing confirmed:

They would purchase the 500 L Sigma Mixer first

If the machine performs well after installation, they will proceed with the 1000 L Sigma Mixer

This phased purchasing method is common in adhesive and chemical industries, where clients validate equipment performance before scaling up.

The customer specifically mentioned that our transparent communication, technical expertise, and fast response time strengthened their confidence to move forward.

 

 

 

9. Why Accent Manufacturing Chose Karvil

Several key factors contributed to their decision:

1. Proven ability to handle extremely tough butyl blocks

Our torque calculations and blade design experience were essential.

2. Manufacturer advantage

Direct engineering support, competitive pricing, and fast customization.

3. Detailed technical documentation

No ambiguity—every question answered clearly and professionally.

4. Ideal discharge method for sticky materials

Tilting discharge greatly improves efficiency for adhesive products.

5. Transparent pricing and discount structure

Customers appreciate honesty and consistency.

6. Confidence-building communication

Responsive communication and clear explanations at each step.

 

10. Conclusion

The partnership between Karvil Machinery and Accent Manufacturing marks an important step in supporting South Africa’s growing adhesive-putty industry. Through careful material analysis, detailed engineering discussions, and transparent pricing, we helped the customer make a confident and well-informed decision.

The 500 L Sigma Mixer will serve as a powerful first step in expanding their production capacity. Once the machine arrives and begins operation, the customer plans to upgrade to a 1000 L unit to further strengthen their manufacturing capabilities.

At Karvil Machinery, our mission is simple:
Provide reliable, efficient, and customized mixing solutions that help clients grow sustainably—no matter where they are in the world.

info@karvil.com 

www.karvil.com