Custom BMC Mold Manufacturer
Precision Bulk Molding Compound Solutions

Looking for a professional BMC mold manufacturer? We specialize in high-precision BMC molds for electrical and industrial components.Delivering precision, durability, and cost-effective solutions.

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China Bmc Mold FactoryBMC (Bulk Molding Compound) Molds

BMC molds require heating systems rather than cooling systems, with operating temperatures typically ranging from 130°C to 160°C. Maintaining consistent mold temperature and effective exhaust gas management is critical during mold design to ensure optimal filling, minimize product deformation, and achieve superior surface quality. Common heating methods include steam, oil, and electric heating rods.

For Class A surface products, vacuum-assisted systems are essential. Proper internal cavity design and vacuum insulation are crucial, and the mold must be equipped with sensors and a vacuum system to monitor temperature and pressure. High-quality BMC molds must deliver durability, precision, and cost-effectiveness. Leveraging years of expertise in SMC and BMC mold production, Yongchao Plastic Mold Co., Ltd. combines advanced knowledge of machinery, materials, and processes to maximize value for our clients.

BMC Lamp Mold

BMC Iron Rest Mold

BMC Cover Mold

BMC Core Insert Mold

BMC Mold Description

Product Material	BMC
Product Material
Steel of Mould Base
	S45C, S50C, LKM,P20 etc.
	Depends on product, we help customers to choose the suitable material
Cavity & Core	Buderus: 1.2344, 8407 SKD61 etc.
	Finkl: P20, Hip-20, H13, etc.
	Hitach: NAK80, DAC, FDAC, SKD61, etc.
	Assab: 618, 718, STAVAX, etc.
Cavity Number	According to customers' product or machine
Runner Type	Hot/Cold runner
Hardness	Pre-Hardness Steel: HRC 30-32±1°
Cavity & Core	Heat Treatment Steel: HRC 50-52±1°
Core Pulling	Depends on the product
Ejection System	Motor, Oil cylinder, Stripping plate, Angel pin, Ejector pin, etc.
Surface Finish	Depends on the product
Surface Finish	Texture hatching, EDM hatching, Polishing, Diamond polishing, etc.
Demould Type	Automatic
Tooling Machine	CNC, EDM, Milling machine, Wire-cutting machine, etc.
Design Software	UG, PRO-E, AutoCAD, etc.
Mould Life	Depends on the hardness of steel and the plastic material
	Commonly used:
	1. 300,000-500,000 shots or one year under normal use procedure for Pre-hardness steel;
	2. 1,000,000 shots or one year under normal use procedure for Hardness treatment steel.

Advantages of BMC Mold

BMC molds offer superior strength, excellent insulation, lightweight precision, and versatile design capabilities, making them ideal for complex and high-performance applications.

Enhanced Durability

BMC molds produce components withhigh tensile and flexural strength, making them ideal for demanding applications.Their excellent impact resistance ensures durability under mechanical stress.

Electrical Insulation

BMC molds offer excellent dielectric properties, ensuring safety and reliability in high-voltage electrical applications.They prevent electrical arcing and short circuits.

Lightweight Precision

Components produced using BMC molds are lightweight yet maintain dimensional stability, making them easy to handle without compromising performance.They are suitable for complex geometries and intricate designs.

Design Flexibility

BMC molds can produce parts with complex shapes, fine details, and varying wall thicknesses, offering design freedom.They can also include integrated features, such as inserts, threads, or connectors, reducing assembly requirements.

Applications of BMC Molds

BMC molds are highly versatile, meeting the needs of various industries with their unique combination of strength, insulation, and design flexibility.

Automotive Industry

Household Electrical

Telecommunication

Medical Devices

Aerospace

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Yongchao Plastic Mold is a premier provider of top-quality Bulk Molding Compound(BMC) molds. With our extensive experience and expertise, we have earned a reputation as the go-to choice for customers seeking the best BMC molding solutions.

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Why Choose Us as Your BMC Mold Manufacturer

At Yongchao Plastic Mold, we specialize in creating molds that meet the demands of any size or complexity. Our products are designed to endure the rigorous conditions of the BMC molding process, offering exceptional durability and reliability for various applications.

Our expert team excels in BMC mold design and production, delivering precision-engineered molds that adhere to the highest quality standards. Leveraging cutting-edge technology, we ensure each mold is crafted with superior accuracy and craftsmanship to exceed client expectations.

We are committed to timely delivery and unparalleled customer service. By collaborating closely with our clients, we ensure all molds are delivered on schedule and tailored to exact specifications. Our dedicated team provides comprehensive support throughout the process, making Yongchao Plastic Mold your trusted partner for all your BMC molding needs.

● Many years experience in mold design, with skilled workers ro ensure the quanlity.
● The strength of production capacity, which can supply 200-300 sets per year and delivery on time.
● Good communication skills and good service to customers, schedules are made weekly reports with detailed photos, then send to customers for monitoring.
● Serve the whole process from designing to machining to inspection to mold trials.
● Freely provide easy-damaged spart parts, and other file what you want.

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Yongchao Plastic Mold Co., Ltd, professional BMC moldings supplier, mainly devoted in BMC injection molding, BMC moulds,services. With BMC injection molding solution, Yongchao BMC mould has accumulated good reputations from our customers in different countries. BMC injection molding in transportations, sanitary series, electronic appliance, building, and sports and so on. We are equipped with a productive factory at your service which also satisfies your customized requirement.

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BMC Mold Knowledge & Guides

A BMC mold refers to a mold used in the manufacturing process of "Bulk Molding Compound" (BMC), a thermosetting composite material made up of a resin (typically polyester), glass fibers, fillers, and additives, used in compression molding to create complex, strong, and dimensionally stable parts, often seen in automotive components, electrical enclosures, and appliance parts due to its high strength, heat resistance, and electrical insulation properties.

☼ What is BMC ?

The plastic component of BMC is usually polypropylene, but other types can also be used. The fiber component is usually glass, but can also be carbon or aramid fibers. The resulting substance from this combination can be processed into any shape and molded into any size desired.

Bulk molding compound(BMC) is a glass-fiber reinforced polymer material and is available in bulk bags as well as slug form. BMC is made up of a polymer resin, various inert fillers, fiber reinforcement, catalysts, stabilizers, and pigments that form a viscous. It is highly filled and reinforced with short fibers.

Depending on the end-use application, BMC is formulated to achieve superior mechanical properties, tight dimensional control, flame resistant, high dielectric strength, corrosion resistant and superior strength. Its excellent flow characteristics make bulk molding compound suited to a wide variety of applications, and is available in a wide variety of colors.

☼ What Is BMC Mold?

BMC is bulk molding compound.

BMC mold used a thermoset plastic made up of a polymer resin, various inert fillers, fiber reinforcement, catalysts, stabilizers, and pigments that form a viscous. It is highly filled and reinforced with short fibers.

BMC is available in bulk bags as well as slug form. The mixing operation can be done in a number of ways. There are three methods for combining glass with paste: a continuous screw mixer, a sigma blade mixer and a plough blade mixer. The process chosen is dependent upon specific product properties, product form and volume.

Depending on the end-use application, compounds are formulated to achieve tight dimensional control, flame resistance, high dielectric strength, corrosion and stain resistance and color stability. Its excellent flow characteristics make BMC mold well suited to a wide variety of applications requiring precision in detail and dimensions. The material is available in a wide variety of colors.

Besides, BMC mold is suitable for either compression molding or injection molding. Compressing molding of BMC is used to produce complex components such as electrical equipment, car components, housings for electrical appliances and tools, in large industrial volumes.

☼ Key Points About BMC Molds:

Material composition:

BMC is a dough-like material, where short glass fibers are mixed with a resin system, fillers, and additives, allowing for high flexibility in tailoring the material's properties based on the application.

Molding process:

BMC is typically molded using compression molding, where the material is placed into the heated mold cavity and compressed under pressure to achieve the desired shape.

Design considerations:

BMC molds need to be designed with features like proper draft angles, vent channels, and parting lines to ensure smooth material flow and easy part removal.

☼ Key Considerations for BMC Mold Design and Optimization

BMC mould design follows similar rules as for any other production process with the plastic industry. But before you build a SMC mould, there are certain things need to be considered.The first and most important is shear edge.

Mould shrinkage

There are two shrinkage for BMC mould. Low profile class A part have a shrinkage of -0.05% to 0%.

Temperature system

BMC need heating channel instead of cooling. The working temperature of the mould is usually at 140 degree to 160 degree. When designing the temperature systme it is important to keep surface temperature within very close parameters. Mould will fill easier and produce parts with less warpage, and uniform surface appearance. The The mould can be heated by steam, or oil, or electricity or even high pressure water.

Vacuum System

To achieve a better appearance of part will require vacuum assistance. For more information please contact our techinician

☼ Types of BMC Molds

1. Single-Cavity Mold

Designed to produce one part per cycle.Best suited for large, intricate components requiring high precision.

2. Multi-Cavity Mold

Contains multiple cavities to produce several identical parts simultaneously.Ideal for mass production, enhancing efficiency and reducing costs.

3. Family Mold

Features multiple cavities of different shapes for producing various parts in one cycle.Useful for assemblies requiring multiple components.

4. Hot Runner Mold

Uses a heated runner system to maintain the material in a molten state, reducing waste.Suitable for high-precision and cost-effective manufacturing.

5. Cold Runner Mold

Employs unheated runner systems, allowing the material to cool between cycles.Preferred for simpler designs and lower material costs.

6.Insert Mold

Incorporates pre-placed inserts, such as metal parts, into the mold before the BMC material is injected.Common in electrical components for added functionality.

7. Two-Plate Mold

A basic design with a single parting line, ideal for straightforward parts.Cost-effective and easy to maintain.

8. Three-Plate Mold

Adds an extra plate for better gating and part separation, ideal for complex designs.Enhances precision and reduces defects in intricate parts.

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