Classification of Plastic Injection Molding Machines

Plastic injection molding machine is an indispensable machine for manufacturing plastic products by injection molding process. In the plastic manufacturing industry, it plays a key role and becomes an important tool in modern manufacturing. The power of injection molding machines allows manufacturers to create a wide variety of high-quality custom parts using high-performance resins for efficient mass production. It is equipped with a highly precise control system that ensures high quality standards for plastic molding. Therefore, it is essential to work with a manufacturer who can provide a plastic injection molding machine that meets your specific needs. In this article, we will introduce you the details of the plastic injection molding machine.

Definition and Importance of Plastic Injection Molding

Plastic injection molding is a mass production method that uses an plastic injection molding machine, molten plastic material and precision engineered tool molds. The plastic injection molding process can be automated for mass production, saving costs and reducing turnaround time. This is a highly general and efficient approach.

Plastic injection molding is crucial for modern manufacturing due to its efficiency, versatility, and cost-effectiveness. It enables the mass production of precise, complex plastic components used in industries such as automotive, electronics, and healthcare. The process offers design freedom, consistent quality, and minimal material waste, reducing production costs. With a wide range of available materials, it caters to diverse product requirements. Short lead times and rapid prototyping capabilities make it essential for industries with evolving needs. Plastic injection molding plays a vital role in delivering reliable, high-quality plastic parts that form the foundation of many everyday products and innovations.

Advantages of Injection Molding

Injection molding offers numerous advantages in manufacturing. Its hallmark is efficiency, adept at swiftly producing copious quantities of precise components. Embracing this method offers a canvas of design possibilities, enabling the creation of intricate, multifaceted shapes. The extensive palette of materials, spanning the spectrum from robust to pliable, accommodates an array of product requirements. Minimized material wastage, facilitated by recyclability, translates to cost savings and environmental benefits. Automation within injection molding ensures unwavering accuracy, uniformity, and reduced labor needs. It proves economical for large-scale production, coupled with swift cycle times to meet the rigors of rapid industries. End products often demand minimal post-processing, showcasing their enduring suitability across diverse applications.

Type of Plastic Injection Molding Machine

An plastic injection molding machine is a machine used to inject molten plastic material into a mold to form a molded part. Choosing the right type of injection molding machine depends on factors such as product design, production requirements, and material properties. Manufacturers and injection molding processing professionals can advise and guide you according to specific needs. In addition to vertical injection molding machines, there are several other common types of plastic injection molding machines.

Horizontal Injection Molding Machine

Horizontal injection molding machine is the most common and commonly used type of injection molding machine. They have a horizontal machine bed and an injection part where the plastic material is injected laterally into the mold. Horizontal injection molding machines are suitable for most injection molding applications.

Vertical Injection Molding Machine

A vertical injection molding machine has a vertical machine bed and injection part where the plastic material is injected into the mold from above. Vertical injection molding machines are suitable for special injection molding applications such as long parts, fiber optic connectors and more. Vertical injection molding machines have a small footprint and are easy to operate and maintain.

Two-Color/Multi-Color Injection Molding Machine

Two-color or multi-color injection molding machines have multiple injection units that can inject plastics of different colors or materials at the same time. They are used to make multi-colored parts or composite parts with different material properties.

Reaction Injection Molding Machines

Reaction injection molding machines are used to perform reaction injection molding or reaction extrusion, in which plastic materials are reacted with other chemicals or additives to produce specific chemical changes. This type of injection molding machine is often used to make parts of reactive materials such as polyurethane and epoxy resins.

Rubber Injection Molding Machine

Rubber injection molding machines are specially designed for processing rubber materials. They usually have a special injection molding system and heating control to meet the processing requirements of rubber materials.

Tonnage of Plastic Injection Molding Machine

The tonnage of plastic injection molding machines refers to their clamping force, the maximum force that can be exerted on the mold. The tonnage of the injection molding machine is usually expressed in tons, but it does not actually represent the weight of the machine, but the force it can exert.

Plastic injection molding machines come in a wide range of tonnages, ranging from a few tons to thousands of tons. Different injection molding applications require different sized tonnages to accommodate different production needs.

It should be noted that when choosing the appropriate tonnage of the plastic injection molding machine, in addition to the size of the part, factors such as material properties, mold structure, production cycle, and budget also need to be considered. Plastic injection molding professionals can often provide tonnage recommendations based on your project needs.

The following are some common tonnage ranges of plastic injection molding machines and their suitable applications:

Small Injection Molding Machines (Less Than 100 Tons):

Small injection molding machines are suitable for the production of small parts such as electronic components, plastic accessories, toys, etc.

Medium-Sized Injection Molding Machines (100 Tons to 500 Tons):

Medium-sized injection molding machines are suitable for producing medium-sized parts, such as appliance casings, automotive parts, furniture components, etc.

Large Injection Molding Machines (500 Tons to 2,000 Tons):

Large injection molding machines are suitable for the production of large parts such as automotive body parts, storage tanks, large containers, etc.

Super Large Injection Molding Machine (Over 2,000 Tons):

Super Large Injection Molding Machine is suitable for the production of very large parts, such as large barrels, large storage boxes, etc.

Common Plastic Injection Molding Machine Brands

The following are some common plastic injection molding machine brands：

• Demag
• Engel
• Nissei
• Sumitomo
• KraussMaffei
• JSW
• Sumitomo Heavy Industries
• Arburg
• Battenfeld-Cincinnati
• Toshiba Machine



• Yizumi
• Chen Hsong
• Nigata Machine Techno
• Husky Injection Molding Systems

These brands are well-known plastic injection molding machine manufacturers in the world, providing injection molding machines of various specifications and tonnages. Different brands may vary in technology, quality, innovation, and service, so when choosing an plastic injection molding machine brand, consider your specific needs, project requirements, and the brand’s reputation and reliability.

Count on Sungplastic for Your Injection Molding Needs

There is an interdependent relationship between the injection molding industry and the plastic injection molding machine, and the injection molding machine is the core equipment of the injection molding industry. The performance, model and capacity of the injection molding machine directly affect the design and quality of the product. Making high-quality plastic parts requires selecting an injection molding machine that suits the material and product requirements. At the same time, the needs of the injection molding industry have also promoted the development of injection molding machine technology, making it more efficient and precise. Injection molding machines and the injection molding industry have jointly promoted the development and innovation of plastic product production.

Sungplastic is an injection molding factory with a long history and extensive experience. We use state-of-the-art injection molding machine technology to ensure parts meet the highest standards of precision and quality. In addition, we offer injection molding design and mold making services to meet your specific specification needs. If you need to learn more about our services, or need help identifying the best injection molding machine model for your needs, please feel free to contact us.
Our Plastic Injection Molding Machines:

• 8 Japanese TOSHIBA 230Ton
• 2 Japanese TOSHIBA 170T
• 4 South Korea LS 168Ton
• 3 Taiwan ChenHsong 125Ton
• 3 HAITIAN 168Ton
• 3 SANSHUN 228Ton
• 4 SANSHUN 380Ton
• 2 SANSHUN 100Ton
• 4 SANSHUN 120Ton
• 4 SANSHUN 480Ton