metal injection moulding

In addition, our company has established cooperative relationships with plastic raw material suppliers, printing manufacturers, etc. to ensure the supply of raw materials and printing quality. Through our rich experience and perfect supply chain, our company can provide customers with high-quality customized metal injection moulding products to meet their specific needs. At the same time, we have 10 years of professional foreign trade service experience, understand the foreign trade process, and better serve our customers. For metal injection moulding products, we can make corresponding plastic parts, which is mainly done through injection molds.

​

Introduction to Metal Injection Molding:

I. Technical Principles and Core Advantages

Metal Injection Molding (MIM) is a precision manufacturing technology that combines powder metallurgy and plastic injection molding. Through intelligent upgrades in 2025, its core advantages will be further highlighted:

Complex structure capability: can form topologically optimized hollowing, multi-step inner cavity and other structures in one go (minimum wall thickness 0.2mm, tolerance ±0.3%);

Material diversity: covers stainless steel 316L, titanium alloy Ti-6Al-4V, tungsten alloy (93W-5Ni-2Cu), etc., with a density of more than 98% of the theoretical value;

Cost efficiency: compared with CNC processing, the cost of complex parts is reduced by 40-60%, suitable for mass production (daily output of 100,000 pieces).

2. Full process technology breakdown

Feedstock Preparation

Powder selection: average particle size 10-20μm (D50), oxygen content <1000ppm (titanium alloy needs <500ppm);

Binder system: the mainstream in 2025 is water-based environmentally friendly formula (polyvinyl alcohol + polyethylene glycol, accounting for 55-65%), thermal decomposition residue <0.02%;

Mixing process: twin-screw extruder (Coperion ZSK series) temperature control 150-180℃, mixing uniformity deviation ≤1.5%.

Injection Molding

Mold design: Diamond-like carbon coating (DLC, thickness 2μm) on the surface of the mold cavity extends the service life to 500,000 molds, and the demolding slope is 0.5-1°;

Process parameters:

Injection pressure: 80-120MPa (dynamically adjusted according to the flow length ratio)

Barrel temperature: 160-200℃ (binder melting window)

Pressure holding time: 3-8 seconds (compensation for shrinkage)

Intelligent control: AI real-time monitoring of the melt front (Moldflow 2025 version), automatic correction of flow rate to prevent weld line defects.

Debinding

Solvent degreasing: Tetrahydrofuran (THF) soaking for 6-12 hours, remove 70-80% of the binder;

Thermal degreasing: step-by-step heating under nitrogen protection (1℃/min to 450℃), residual carbon content <0.1%;

New technological breakthrough: supercritical CO₂ degreasing (BASF 2025 patent), time is shortened to 4 hours, energy consumption is reduced by 40%

Sintering

Sintering curve: high temperature section 1350-1550℃ (depending on the material), isostatic pressing assisted (Ar pressure 100MPa) densification;

Dimension control: linear shrinkage 15-20%, pre-amplification compensation through CAD model (AI prediction compensation coefficient accuracy ±0.05%);

Advanced equipment: vacuum sintering furnace (ALD Vacuum Technologies) integrated oxygen content monitoring (<10ppm alarm).

Post-Processing

Surface finishing: magnetic polishing (for inner cavity burrs), PVD coating (improving wear resistance);

Intelligent detection: Industrial CT (Nikon XT H 450) realizes full inspection of micropores (>50μm), and the yield rate is increased to 99.95%.

Key points of metal injection molding:

1. Raw material design and preparation

Powder property control

Particle size requirements: 10-20μm (D50), specific surface area>0.5m²/g (titanium alloy oxygen content <500ppm);

Material selection: stainless steel 316L (accounting for 60%), titanium alloy Ti-6Al-4V (medical field), tungsten alloy (military high-density parts).

Binder innovation

Environmentally friendly water-based system: polyvinyl alcohol + polyethylene glycol (decomposition residue <0.02%), replacing traditional paraffin base (carbon emissions reduced by 40%);

Supercritical CO₂ degreasing: BASF 2025 new technology, degreasing time is reduced from 12 hours to 4 hours, and energy consumption is reduced by 40%.

2. Optimization of mold and molding process

Key points of mold design

Surface coating: DLC coating (thickness 2μm) increases service life to 500,000 molds;

Mold release structure: slope 0.5-1°, ejector layout density ≥1 root/20cm² (anti-deformation)

Injection pressure: 80-120MPa, dynamically adjusted according to flow length ratio

Barrel temperature: 160-200℃, zone temperature control (±2℃ fluctuation)

Pressure holding gradient: 3-stage attenuation (80→50→30MPa), compensation for shrinkage (15-20%) and prevention of warping

3. Breakthrough in sintering and post-processing

Densification control

Sintering curve: 1350-1550℃ (titanium alloy requires vacuum degree <10⁻³Pa), isostatic pressing assisted (100MPa Ar gas);

Dimension compensation: AI predicts linear shrinkage (error ±0.05%), CAD model pre-enlargement design.

Surface strengthening technology

Magnetic polishing: Inner cavity burr removal rate> 99.9% (Ra reduced from 1.6μm to 0.2μm);

PVD coating: TiN coating (thickness 3-5μm) improves wear resistance and extends service life by 3 times

metal injection moulding

We are a metal injection moulding manufacturer, providing high-quality metal injection moulding manufacturing. As long as you want to customize/develop metal injection moulding products, you can find us. We have professional injection mold design and mature manufacturing technology, providing you with one-stop service, from product design-mold making-product production-product packaging-product transportation, we can help you in every link. As long as you come to us, we will provide you with the ultimate service and satisfy you in terms of product quality, production time, information dialogue, etc.

Plastic Injection Mould making

Plastic molding specifications

Mold design:

Transaction process:

Mold testing:

Product packaging

Factory

We are Custom Plastic Mold factory. Our factory is plastic injection mold maker. we has 17 years of experience in professional custom plastic mold and 10 years of foreign trade experience. We are custom Plastic Mold supplier. We can provide custom Plastic Mold service. Our factory can make the Injection molded plastic parts, and the quality of the products will satisfy you.

We have more than 50 high-end machines and hundreds of engineers and designers. We can provide one-stop service, from product design - mold making - product production - product packaging - transportation. We have a complete production chain. We can meet all your requirements.

Services we provide:

Professional custom mold service, Plastic mold design and manufacturing .plastic product production, product design, mold design, blow mold customization, rotational mold customization, die-casting mold customization. 3D printing services, CNC manufacturing services, product packaging, customized packaging, shipping services.

We always adhere to the principles of quality first and time first. While providing customers with the highest quality products, try to maximize the production efficiency and shorten production time. We are proud to tell every customer that our company has not lost any customer since its establishment.If there is a problem with the product, we will seek a solution actively and take responsibility to the end.

FAQ

Q1: Are you trading company or manufacturer ?

A: We are manufacturers.

Q2. When can I get the quotation?

A: We usually quote within 2 days after we get your inquiry.

If you are very urgent, please call us or tell us in your email so that we can quote for you first.

Q3. How long is the lead-time for mold?

A: It all depends on the products' size and complexity. Normally, the lead time is 25 days.

Q4. I have no 3D drawing, how should I start the new project?

A: You can supply us a molding sample, we will help you finish the 3D drawing design.

Q5. Before shipment, how to make sure the products quality?

A: If you don't come to our factory and also don't have the third party for inspection, we will be as your inspection worker.

We will supply you a video for production process detail include process report, products size structure and surface detail, packing detail and so on.

Q6. What is your payment terms?

A: Mold Payment: 40% deposit by T/T in advance, 30% second mold payment before sending out the first trial samples, 30% mold balance after you agree the final samples.

B:Production Payment: 50% deposit in advance, 50% before sending out the final goods.

Q7: How do you make our business long-term and good relationship?

A:1. We keep good quality and competitive price to ensure our customers benefit for best quality products.

2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.