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Plastic Injection Mould

Your Premier Plastic Injection Mould Manufacturer！
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AOJIE Mold is a high-quality manufacturer with more than 15 years of experience in mold making and sales. Our company has more than 150 qualified technical personnel, 10 senior engineers and more than 30 technical designers, using internationally advanced development software (CATIA, UG, PRO/E) for product development, mold design, analysis, processing and control . The current products include Plastic Injection Mold, Plastic Chair Mould, Plastic Crate Mould, Plastic Bucket Mould, Plastic Table Mould, etc.

Why Choose Us?

Rich Experience

15+ years of manufacturing experience

High Quality

Around 300,000 shots

Good Service

1 year warranty for molds

Prompt delivery

50~60 days for mold production

 

 

 

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What is Plastic Injection Mould？

 

Plastic injection moulding is a manufacturing process used to produce plastic parts in large quantities. It involves melting plastic pellets or granules and injecting the molten plastic into a mould cavity. The plastic then cools and solidifies, taking on the shape of the mould cavity. Once the plastic has cooled, the mould opens up, and the finished part is ejected.

The process is widely used for the production of a wide range of plastic products, including automobile parts, toys, electronic components, medical devices, and packaging materials.

 

Features of Plastic Injection Mould

 

Cavity and core

Mainly composed of cavity and core. The cavity is the part of the mold that shapes the outer surface of the plastic part, while the core shapes the inner surface.

Gate System

The gate is the point where molten plastic is injected into the mold cavity. The design of the gate affects the flow of plastic and affects the appearance and integrity of the part.

Runners

The runner is the channel that guides the molten plastic from the nozzle of the injection molding machine to the mold cavity.

Ejector pins

Ejector pins are used to push the cured plastic part out of the mold after the injection molding process is complete.

Cooling System

Cooling channels are incorporated into the mold design to control temperature and ensure consistent part quality.

Ventilation system

Proper exhaust helps prevent defects such as trapped air, voids, or burns in the final part.

Slide and lift mechanisms

Slides and lifters are features used to create undercuts or complex part geometries.

Alignment and Registration Features

Ensures the mold halves are properly aligned during the closing process, maintaining molded part accuracy and consistency.

Hot runner

Hot runner systems maintain the temperature of the plastic within the runner system, eliminating the need to reheat the material for subsequent injections, reducing waste and improving efficiency.

 
Advantages of Plastic Injection Mould
 
1. High Production Rates

Plastic injection moulding is a highly efficient process, which allows for the production of large quantities of identical parts at a rapid pace. This can result in significant cost savings and increased productivity.

2. Consistent Quality

Plastic injection moulding provides a high level of precision and accuracy, resulting in consistent quality parts. This is particularly important for industries that require tight tolerances and repeatable results.

3. Wide Range of Material Options

There are many different types of plastics that can be used in injection moulding, each with their own unique properties. This means that manufacturers can choose the best material for their specific application, from flexible and soft materials to rigid and durable options.

4. Design Flexibilit

Injection moulding allows for complex shapes and designs to be created with ease, giving designers greater flexibility in their creations.

5. Cost-Effective

Although the initial setup costs for injection moulding can be relatively high, the long-term cost savings can be significant due to the high production rates and consistent quality of parts produced.

 

6. Reduced Waste

Injection moulding produces minimal waste, as any excess plastic can be melted down and reused for future production runs, reducing environmental impact and material costs.

 

Material of Plastic Injection Mould
 

 

Tool Steel (such as P20, H13)

Tool steels are widely used in injection molding due to their excellent hardness, wear resistance, and machinability. P20 is a versatile, pre-hardened steel suitable for many applications, while H13 is a hot work steel known for its high heat resistance.

Stainless Steel (such as 420 and 440)

Stainless steel is chosen for molds requiring corrosion resistance and high polishing capabilities. It is often used for molds producing clear or transparent parts.

Aluminum

Aluminum molds are favored for their excellent thermal conductivity, allowing for faster cooling cycles. This can result in increased production efficiency.

Beryllium-Copper Alloy

Beryllium-copper alloys offer good thermal conductivity, high hardness, and corrosion resistance. They are suitable for molds with complex geometries and those requiring rapid heat dissipation.

Nickel Alloys

Nickel-based alloys, such as Inconel, are chosen for their high temperature resistance and corrosion resistance. These alloys are suitable for molds processing high-temperature engineering plastics.

MoldMAX Alloys:

MoldMAX alloys are beryllium-free copper alloys with high thermal conductivity and wear resistance. They are often used in molds requiring superior cooling capabilities.

 

Production Process of Plastic Injection Mould

 

 

1. Design and Prototyping: Engineers use computer-aided design (CAD) software to create detailed 3D models of parts. Generate prototypes via 3D printing or other rapid prototyping techniques to test the functionality and design of parts.

2. Mold design and manufacturing: Once the design is complete, the mold for the part is created. Involves the design of mold cavities and cores, gating systems and cooling channels. Typically machined from metals such as steel or aluminum to withstand the high pressure and temperature of the injection process.

3. Material preparation: Put the plastic particles into the hopper of the injection molding machine and heat them to a molten state in the barrel.

4. Injection molding: Molten plastic is injected into the mold cavity under high pressure. The plastic fills the cavity and takes on the shape of the mold.

5. Cooling and solidification: Once the mold cavity is filled, the plastic can cool and solidify within the mold.

6. Ejection: After the plastic solidifies, the mold is opened and the finished part is ejected from the mold through pins or ejection plates.

7. Secondary processing: According to specific requirements, the parts can be subjected to secondary processing such as trimming, assembly, and surface finishing.

8. Quality Control: The parts produced are inspected and tested to ensure they meet the required quality standards.

9. Packaging and Shipping: Once the parts pass inspection, they will be packed and ready to be shipped to the customer, or further assembled in the case of multi-component products.

 

 
Group photo of exhibitors
 

 

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PLASTIMAGEN MEXICO 2013
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Chinaplas 2018
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Chinaplas 2019
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Chinaplas 2021
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Chinaplas2023
8ab16b348caa8fa7532eaeb32d2621492023113011400308224e5d6a4d476695545a21d92ebe58size400x0
PPP PHILIPPINES 2023
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Plastics & Rubber Vietnam 2023
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Milan EICMA 2023 Motorcycle Exhibition

Our Service

Pre-sale

• Aojie will issue a quotation for customer reference based on the SprueGate, materials, specifications and other requirements provided by the customer.

On sale

• Send the mold processing schedule, processing progress report and mold processing photos to the purchaser every 2 weeks.

•Trial samples will be sent for buyers to check and formulate improvement requirements.

After sales

• If customers have any questions during the use of the mold, they can contact us. Our molds have 1 year warranty and we will help them solve the problem.

 

FAQ

Q: Can you injection mold plastic?

A: Injection molding is ubiquitous as a manufacturing process—in fact, the majority of plastic products in the world today are manufactured by injection molding.

Q: What is plastic injection moulding used for?

A: Injection moulding is used to create many things such as wire spools, packaging, bottle caps, automotive parts and components, toys, pocket combs, some musical instruments (and parts of them), one-piece chairs and small tables, storage containers, mechanical parts (including gears), and most other plastic products .

Q: Is plastic injection molding difficult?

A: Developing a design for plastic injection molding is a complicated process that requires significant skill to avoid manufacturability issues. Proper design, planning, prototyping, and testing will help to prevent many of the pain points that can arise during the early phases of manufacturing.

Q: What is the easiest plastic to injection mold?

A: ABS resin is an opaque thermoplastic polymer and an engineering grade plastic. There are many advantages to using ABS. It's tough, has good dimensional stability, it resists impacts and scratching, and is hard to break. Also, the low melting temperature makes it easy to mold.

Q: What is the life expectancy of a plastic 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 molding cheaper than machining?

A: Plastic injection molding is far less expensive per part than plastic machining. Machining a part is usually 25 times more expensive than an injection molded part. But, the upfront cost of the mold is steep, usually several thousand dollars. So, it makes sense to continue machining as long as your quantity is small.

Q: Who needs plastic injection molding?

A: Plastic molding is commonly used to create items such as lids, jars, tubes, bottles, and other forms of packaging. This is the preferred packaging manufacturing technique because it provides a wide range of plastic resins and additives.

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: How long does it take to make a plastic injection mold?

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

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: How long does it take to injection moulding?

A: Injection moulding involves a high pressure injection of a polymer into a mould where it is shaped. The individual parts of this process are very short. The whole injection moulding process usual lasts from 2 seconds to 2 minutes.

Q: What is the cheapest plastic to injection mold?

A: Materials with the lowest cost, generally polypropylene and polyethylene, are incredibly versatile and are used to make everything from milk jugs to car batteries. These are the materials most people use every day and low material costs help make mass production possible.

Q: How thin can you injection mold plastic?

A: On average, the minimum wall thickness of an injection molded part ranges from 2mm to 4mm (. 080 inch to . 160 inch).

Q: How many times can an injection mold be used?

A: An aluminum mold will generally last between 5,000 and 10,000 cycles, and a full-scale steel production mold can last for over 100,000 cycles. Plus, since injection molding uses the same mold for each part, you'll have identical products.

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 plastic be injection molded?

A: Plastic injection molding is the most widely used components manufacturing process for a variety of reasons, including: Flexibility: manufacturers can choose the plastic injection mold design and type of thermoplastic that's used for each component.

Q: What plastic is used in injection moulding?

A: When it comes to injection molding resins, there are two types of polystyrene that are commonly used: High Impact Polystyrene (HIPS) and General Purpose Polystyrene (GPPS). GPPS is transparent, while HIPS is opaque. Hard cases for toolboxes and bodies of power tools are also made using High Impact Polystyrene.

Q: Why plastic injection molding?

A: Plastic injection molding is an extremely versatile method of producing plastic parts and has multiple advantages over other methods of plastic molding. Not only is the process simpler and more reliable than others methods, but it is also extremely efficient.

Q: Why is injection moulding good for plastic?

A: Injection moulding is the preferred production method for most mass-produced plastic products, due to its high output rate and consistency of quality. These products include but are not limited to: Automotive parts – dashboards, bumpers, grilles.

Q: Can you injection mold clear plastic?

A: Acrylic is a clear and commonly used injection molding plastic. The chemical name for acrylic is Poly(methyl methacrylate), which can be shortened to PMMA. The main advantage of injection molded acrylic is its transparency and shatter resistance.

 

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

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