ABOUT US
WELCOME TO BHARAT MIM PVT. LTD.
Moulding the Future of Advanced Precision Engineering.
Our facility is equipped with cutting-edge machinery, automated production lines and rigorous quality control systems that ensure each component meets the highest industry standards. From product development and prototyping to large-scale manufacturing and post-processing, we offer an end-to-end solution tailored to your needs.
Driven by customer satisfaction, technical innovation and a strong ethical foundation, we continue to push the boundaries of what’s possible in metal part manufacturing. Whether you’re in automotive, aerospace, medical or consumer electronics, BHARAT MIM is your go-to partner for scalable, precise and reliable MIM solutions.
OUR MISSION
To redefine precision manufacturing through innovation in Metal Injection Moulding — delivering exceptional quality, unmatched performance and customized solutions that empower our clients to lead in their industries.
OUR VISION
To be a global force in Metal Injection Moulding, known for excellence, reliability and relentless innovation. We envision a world where complex ideas become real through MIM — faster, smarter and more sustainable.
MIM
PROCESSING
1. Feedstock Preparation
In the Metal Injection Moulding (MIM) process, feedstock is the critical starting material that determines the quality, precision, and performance of the final product. It is composed of ultra-fine metal powders—typically less than 20 microns in size—blended uniformly with a thermoplastic polymer binder. This combination results in a homogeneous mixture that behaves like plastic during injection moulding but retains the inherent properties of metal after sintering.
During moulding, the feedstock can flow easily into intricate cavities, capturing fine details and complex geometries with high accuracy. Once shaped, the binder is carefully removed through a debinding process, and the remaining metal structure is sintered at elevated temperatures to achieve near-full density and exceptional mechanical strength.
The integrity and consistency of the feedstock are essential to achieving dimensional stability, superior surface finish, and repeatable production quality.
At Bharat MIM, we ensure precise control over every stage of feedstock preparation, enabling us to deliver high-performance metal components that meet the most demanding industrial standards.
2. Injection Moulding
Once the feedstock is prepared, it is heated to a specific temperature and injected into a high-precision mould cavity using an advanced injection moulding machine. This process results in the formation of the “Green Part” — a near-net-shape component that replicates the exact design, dimensions and intricate details of the final product. At this stage, the part has the required geometry but still lacks the structural integrity and mechanical properties of solid metal.
The Green Part is relatively fragile and must be handled with care, as it contains the polymer binder that temporarily holds the metal particles together. Despite its delicacy, this step is vital for ensuring high production accuracy, consistent replication and minimal material wastage.
It lays the groundwork for the subsequent stages of debinding and sintering, which will transform the green part into a fully functional, high-density metal component.
3. Debinding
After The Green Part is formed, the next critical step is debinding—the process of removing the polymer binder that held the metal particles together during moulding.
This transformation phase is essential to prepare the part for sintering while maintaining its complex geometry. Debinding is typically performed using two primary methods :
Catalytic Debinding is a highly efficient process where the green part is placed in a controlled atmosphere—typically containing nitric or oxalic acid vapors—at elevated temperatures. The binder reacts with the vapor, breaking down rapidly and evaporating without affecting the part’s shape. This method ensures uniform binder removal, making it ideal for high-volume production. It maintains excellent dimensional accuracy and surface quality, leaving behind a fragile “brown part” ready for the sintering stage.
Solvent Debinding : Which involves immersing the part in a solvent that dissolves the soluble portion of the binder. Once the binder is removed, what remains is known as the “Brown Part” — a highly porous and extremely fragile structure that retains the shape of the final component. Although delicate, this stage is vital in ensuring the metal particles are correctly positioned and ready for densification in the sintering process.
Precision and care at this step are crucial to achieving the final product’s dimensional accuracy and mechanical integrity.
4. Sintering
In the final and most transformative stage of the MIM process, the brown part is carefully heated in a high-temperature furnace—typically between 1,200°C and 1,400°C—under a precisely controlled atmosphere. This process, known as sintering, causes the metal particles to bond together at the atomic level, eliminating pores and significantly increasing the part’s strength and density.
As the particles fuse, the part undergoes controlled shrinkage of around 15–20%, resulting in a final component with near-theoretical density, often reaching 96–99%. The outcome is a fully dense, high-performance metal part with excellent mechanical properties, dimensional accuracy, and a refined surface finish—virtually indistinguishable from parts made by traditional metalworking methods. Sintering is where the MIM process truly brings metal to life.
5. Post-Processing (Optional)
Depending on the application, parts may undergo secondary operations
such as :
Heat Treatment
After sintering, components may undergo heat treatment to enhance mechanical properties such as hardness, strength, and wear resistance. This step ensures the part meets specific performance requirements based on its application.
Machining
For applications demanding extremely tight tolerances or special geometries, light machining may be performed. This allows for fine-tuning of dimensions, threads, or complex surfaces without compromising part integrity.
Surface Finishing
Surface finishing processes are applied to improve the appearance, smoothness, and functional characteristics of the component. This includes techniques such as polishing, coating, and plating.
Polishing helps achieve a smooth, reflective, or aesthetic surface finish, especially important for consumer-facing parts.
Coating (like PVD or anodizing) adds protective layers to improve wear and corrosion resistance.
Plating (such as nickel or chrome plating) enhances both appearance and surface properties like conductivity and durability.
