Injection Mould

Your Professional Injection Mould manufacturer!

Aojie Mold specializes in the design and manufacturing of plastic injection molds and is one of the leading mold manufacturers. Our company covers an area of more than 10,000 square meters. We have more than 150 qualified technical personnel, 10 senior engineers and more than 30 technical designers. We also have our own injection molding workshop, which can independently complete mold trial production and mass production of plastic parts.

Why Choose Us?

Quality Assurance

We use high-quality mold materials, follow strict guidelines in the manufacturing process, and were certified to ISO 9001:2015 quality standard certification .

Various Types

Our injection molds can produce various types of Commodity Mold, Plastic Mold, and Thin Wall Mold. Any mold can be custom-designed and manufactured to meet your needs.

Wide Range of Applications

We focus on providing high-quality injection mold solutions, which can be used in different fields such as Automotive parts, Packaging, Industrial machinery accessories, Furniture, Sports, and leisure.

CNC center and 150 technicians

Our CNC center has high-speed milling, EDM and other equipment, and has CAD, CAM, CAE design technology and rich mold manufacturing experience.

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What Is Injection Mould？

Injection molding is a manufacturing process used to produce plastic parts in large volumes. The process involves injecting molten plastic material into a mold cavity, allowing it to cool and solidify, and then ejecting the finished product. Injection molding is widely used for the production of a variety of plastic products, ranging from small components to large automotive parts.

Components of Injection Mould

1.Mould Base: The mould base is the foundation of the mould, and it supports all other components of the mould. It is generally made from steel or aluminum and provides the mounting surface for the mould cavity, core, ejector system, and cooling channels.

2.Mould Cavity: The mould cavity is the part of the mould that forms the external shape of the part being produced. It is usually created by machining a cavity into the mould base or by using inserts that can be removed and replaced as needed.

3.Core: The core is used to form the internal features of the part, such as holes or undercuts. It is mounted on a core plate and slides into the cavity during the injection process to form the complete shape of the part.

4.Runner System: The runner system delivers molten plastic from the machine nozzle to the mould cavity. It consists of a sprue, which is the main channel that directs plastic from the machine into the runner system; runners, which distribute plastic to each cavity; and gates, which control the flow of plastic into the cavity.

5.Ejector System: The ejector system is used to eject the finished part from the mould after it has solidified. It includes ejector pins or plates that push the part out of the mould, as well as a return mechanism that pulls the pins or plates back into position.

6.Cooling System: The cooling system helps to solidify the plastic quickly and evenly by circulating water or another cooling fluid through channels in the mould. The cooling system is essential for maintaining the dimensional accuracy and quality of the final part.

7.Venting System: The venting system allows air to escape from the mould cavity as the plastic flows in. Proper venting is critical to ensure that the plastic fills the cavity completely and does not trap air or leave voids in the finished part.

Advantages Of Injection Mold

The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.

High Efficiency

Injection molding allows for the production of large quantities of parts in a relatively short time. The process is highly automated, ensuring fast cycle times and high production rates.

Precision and Complexity

Injection molding enables the creation of intricate and complex parts with a high level of precision. The molds used in the process can be designed to produce parts with tight tolerances and intricate features, such as thin walls, undercuts, and complex geometries.

Material Versatility

Injection molding supports a wide range of materials, including thermoplastics, thermosetting plastics, elastomers, and some metals.

Cost-Effective

Although the initial tooling cost for injection molds can be high, the per-unit cost decreases significantly with increased production volume. Additionally, the high production efficiency and automation of the process contribute to overall cost savings.

Consistency and Reproducibility

Injection molding ensures consistent and reproducible part quality. Once the mold is set up, each part produced will have the same dimensions and characteristics, providing uniformity and reliability.

Design Flexibility

Injection molding offers designers great flexibility in part design. With the ability to create complex shapes and incorporate various features into a single part, designers have more freedom to innovate and optimize their products.

Minimal Post-Processing

Injection molded parts usually require minimal post-processing compared to other manufacturing methods. The parts typically have smooth surfaces and require little to no additional finishing, reducing time and cost.

Environmental Benefits

Injection molding can be environmentally friendly. It produces minimal waste as excess material can be recycled, and the process itself is energy-efficient compared to other manufacturing methods.

Types Of Injection Mould

There are several types of injection moulds, each with their own unique characteristics and applications. Here are some of the most common types:

Single Cavity Mould: A single cavity mould is the simplest type of mould and produces one part at a time. It is often used for low-volume production runs or for parts that are large or complex.

Multi-Cavity Mould: A multi-cavity mould can produce multiple identical parts simultaneously. This significantly increases production efficiency and reduces costs. Multi-cavity moulds can have anywhere from two to hundreds of cavities, depending on the size and complexity of the part.

Family Mould: A family mould is a type of multi-cavity mould that produces different parts in a single cycle. The parts may be similar in shape or related in function, making them ideal for use in products that require multiple components.

Hot Runner Mould: A hot runner mould uses a heating system to keep plastic molten within the runner system, eliminating the need for sprues and runners that must be removed from the final part. Hot runner moulds reduce waste, improve efficiency, and can produce higher quality parts.

Cold Runner Mould: A cold runner mould uses a traditional runner system that remains in the final part and must be removed after the injection process. These moulds are less expensive than hot runner moulds but can produce more waste and lower-quality parts.

Insert Mould: An insert mould incorporates pre-made metal or plastic components into the final part during the injection process. This allows for the creation of complex parts with multiple materials and components.

Overmould: An overmould involves moulding one material over another to create a product with multiple layers or colors. This technique is often used for products requiring a soft-touch grip or for creating decorative elements.

Application of Injection Mould

Automotive

Injection moulding is extensively used in the automotive industry for producing components such as dashboards, interior trims, door panels, bumpers, and engine parts. It offers cost-effective production of complex shapes and ensures dimensional accuracy and consistency.

Electronics

Injection moulding is used to manufacture a wide range of electronic components, including casings for smartphones, tablets, laptops, and other consumer electronics. It also produces connectors, switches, housings for electrical devices, and components for circuit boards.

Medical

Injection moulding plays a critical role in the production of medical devices and equipment. It is used to manufacture items like syringes, IV components, surgical instruments, drug delivery systems, and disposable medical supplies. The process ensures precision, cleanliness, and biocompatibility of the produced parts.

Packaging

Injection moulding is commonly employed for manufacturing various types of plastic packaging, such as bottles, caps, closures, containers, and trays. It offers excellent product consistency, durability, and design flexibility to meet the requirements of different packaging applications.

Consumer Goods

Many everyday consumer goods are produced using injection moulding. This includes items like toys, kitchen utensils, household appliances, garden tools, furniture components, and cosmetic containers. Injection moulding enables mass production of these products with high quality and detailed features.

Industrial Components

Injection moulding is utilized for fabricating industrial components like gears, bearings, valves, pipes, fittings, and housings. Its ability to produce parts with high strength, dimensional stability, and resistance to chemicals and heat makes it suitable for demanding industrial applications.

Construction

Injection moulding is involved in manufacturing various construction-related products, such as pipes, fittings, profiles, insulation materials, and drainage systems. It offers durability, cost-effectiveness, and design flexibility for meeting the specific requirements of the construction industry.

AOJIE History

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FAQ

Q: What is injection molding used for?

A: Injection moulding is used to make a range of widely used products, including common plastic items like bottle tops as well as remote control casings, syringes and more. It is also commonly used for manufacturing larger items such as car body panels.

Q: Why is injection molding so popular?

A: Plastic injection molding offers high efficiency and rapid production. There are several good reasons why this is the most common and efficient form of molding. Compared to other methods, the injection molding process is fast and its high productivity makes it more efficient.

Q: What is the lifespan of an injection mold?

A: Plastic injection molds last from hundreds to over a million cycles. A plastic injection mold lifespan depends on its environment, maintenance, structure, SPI classification, and other factors.

Q: Is injection moulding easy?

A: Plastic injection moulding is a complex manufacturing process commonly used to create plastic components. The ability of injection moulding to produce thousands of complex parts quickly makes it the perfect process for the mass production of plastic components.

Q: Is injection molding food safe?

A: Aside from making it easy for food manufacturers to meet demand, food-grade injection moulding also provides a cost-effective way to produce such products. To be considered food-safe, the plastic must be resistant to deteriorating or leaching when in contact with the food.

Q: Can you do injection moulding at home?

A: 3D printed injection molds are a time and cost-effective alternative for low-volume production. They are also less expensive than CNC machining.

Q: Is injection moulding bad for the environment?

A: Injection moulding isn't all bad for the environment. In comparison to other moulding processes, it is more energy-efficient and produces less waste. In fully optimised injection moulding processes, only the amount of polymer required to fill the mould is used, meaning as little as possible is wasted.

Q: Is injection molding stronger than 3D printing?

A: Because injection molded parts are produced in a single step, they tend to be stronger than 3D printed parts which may weaken where layers meet.

Q: How long does it take to make an injection mold?

A: 8-10 weeks on average, depending on the complexity and cavitations of the mold.

Q: Do injection molds need vents?

A: While the more common scenario is for the air to exhaust out of the cavity during injection to prevent filling and burning issues, vents also allow air to enter the cavity during mold opening and ejection. Vents thereby eliminate a vacuum condition that can cause a part or feature to stick in the cavity or on the core.

Q: How often should injection molds be cleaned?

A: Clean your mold after each production cycle to prevent the build-up of foreign materials. Cleaning can be done with the injection mold tool in the press or on the bench.

Q: Can you inject mold metal?

A: Metal injection molding is great for producing very intricate parts quickly and efficiently. The metal injection molding process is efficient, easily repeatable, and cost-effective. In a single step, intricate parts can be mass-produced in high volume and shaped to perfection.

Q: Can you injection mold steel?

A: While both steel and aluminum are usually suitable for a broad range of standard injection molding resins, steel can offer an advantage if you're working with more complex or advanced formulations — such as those reinforced with glass, fiber or other additives.

Q: Is Styrofoam injection molded?

A: Polystyrene is well suited for the injection molding process. It can be injection molded into either solid rigid products or foam products. It's production demands higher energy input as it has a higher melting point. It compensates for this with its low shrinkage and this allows for good design detail.

Q: What is the hardest plastic for injection molding?

A: One of the strongest thermoplastic materials, polycarbonate is one of the most shatter-resistant plastic materials available for use in injection molding.

Q: What is the working principle of injection Mould?

A: Injection molding is a process in which a thermoplastic polymer is heated above its melting point, resulting in the conversion of the solid polymer to a molten fluid with a reasonably low viscosity. This melt is mechanically forced, i.e.,injected, into a mold in the shape of the desired final object.

Q: What are common uses for injection Moulds?

A: • Automotive parts: dashboards, bumpers, grilles.

• Electronic components: electrical connectors, enclosures, protective sleeving.

• Medical devices: syringes, valves, dishes.

• Consumer plastics: mobile phone cases, bottle caps, toys.

• Furniture parts: seat cushions, chairs, seat covers.

Q: Why is injection molding used for plastic?

A: There are several good reasons that plastic injection molding is known as the most common and most efficient form of molding. The process itself is extremely fast compared to other methods, and the high production output rate makes it even more efficient and cost-effective.

Q: What is the difference between injection and moulding?

A: In general, blow molding is used to make singular, hollow products like bottles and beakers. Injection molding makes solid parts, like plates and discs, or is used to produce solid parts or pieces for plastic products.

Q: How the injection mould is designed?

A: Each injection mold design must have a gate, or an opening that allows the molten plastic to be injected into the cavity of the mold. Gate type, design, and location can have effects on the part such as part packing, gate removal or vestige, cosmetic appearance of the part, and part dimensions and warping.

As one of the leading injection mould manufacturers and suppliers in China, we warmly welcome you to buy high quality injection mould made in China here from our factory. For customized service, contact us now.

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