Industrial plastic injection molding machines are vital equipment in the production of packaging, electronics, automobiles, pharmaceuticals, and more. They enable fast, precise forming, boost productivity, and reduce costs. In this article, Thai Duong Plastics provides an overview of the structure, working principles, classifications, and real-world applications of these machines.
What Is an Industrial Plastic Injection Molding Machine?
An industrial plastic injection molding machine, often simply called an injection molding machine, uses high pressure to force molten plastic into a mold cavity. After cooling, the finished part is ejected and ready for the next processing step. This cycle is repeated continuously with high precision, making it ideal for mass production.
Injection molding machines are widely used in many fields:
- Packaging industry: Producing boxes, bottles, jars, and plastic films for food, cosmetics, and consumer goods.
- Electronics and home appliances: Molding housings, component trays, and technical plastic parts with high accuracy.
- Automotive sector: Manufacturing interior components, door handles, dashboards, and other technical parts.
- Medical and pharmaceutical: Creating products that meet strict hygiene and safety standards, such as syringes, pill containers, and medical cases.
- Interior decoration: Producing decorative pieces and household items in a wide range of designs and colors.
An injection molding machine typically has two main sections:
- Clamping unit: Holds the injection mold firmly during molding and opens it after the part solidifies.
- Injection unit: Consists of a screw and heating system that melts plastic pellets and injects the melt into the mold under high pressure.
The basic operating principle is to heat plastic pellets until they reach a molten state, then inject this melt into the closed mold. After the plastic cools and solidifies, the mold opens to release the part. The entire cycle is fully automated and can run continuously with high stability.
Popular Types of Industrial Injection Molding Machines
Each type of injection molding machine has a different design and cost, suited to specific production goals. Below are common models and reference prices. Actual prices vary depending on condition (new or used), technical specifications, and supplier.
Mini injection molding machine
This compact, low-power machine is easy to install and operate. It is suitable for research, mold testing, and small-batch production of simple components or prototypes.
Reference price: Approximately 150 – 400 million VND.
Electric injection molding machine
Powered by electric motors instead of hydraulics, this machine saves energy, reduces noise, and improves precision. It is ideal for high-tech plastic products such as electronic components and medical devices that demand tight tolerances.
Reference price: Standard or used models range from 225 to 375 million VND (160 tons) and 450 to 625 million VND (250 – 300 tons).
Hydraulic injection molding machine
This traditional model uses hydraulic oil to generate clamping force. It features a simple structure, strong clamping force, easy operation, and straightforward maintenance. It is suited to large, thick-walled products like trash bins, furniture, and industrial housings.
Reference price: Around 370 – 450 million VND (160 tons) and 1.2 – 1.5 billion VND (320 tons).
Servo injection molding machine
This model combines a hydraulic system with a servo motor drive, delivering stable performance, energy savings, and high precision. It suits medium- to large-thickness parts where consistent speed is essential.
Reference price: Approximately 400 – 550 million VND (180 – 320 tons).
Horizontal injection molding machine
With a horizontal mold and injection axis, this machine is common in mass-producing items such as phone housings, home-appliance parts, toys, and electronic components.
Reference price: Roughly 800 million to 3 billion VND depending on capacity and brand.
Vertical injection molding machine
This machine injects vertically, making it easier to insert components into the mold. It is widely used for over-molding and insert-molding items such as plugs, connectors, metal-core parts, and PCBs.
Reference price: About 900 million to 2.5 billion VND.
Rotary-table injection molding machine
Featuring a rotating mold table or multiple simultaneous injection stations, this machine shortens production cycles and boosts output. It is commonly used in large-scale or complex production lines.
Reference price: Around 2.5 – 5 billion VND, depending on configuration and brand.
Notes on Purchasing an Injection Molding Machine and Reputable Suppliers
When buying an industrial injection molding machine, clearly define the product requirements, production capacity, and budget. The selected machine should offer suitable clamping force, shot volume, and compatible materials. Prioritize equipment that is easy to maintain and supported by local technical service in Vietnam. Reputable brands with clear warranties and good reviews include Haitian, Toshiba, JSW, Sumitomo, Engel, and Toyo.
Injection molding machines enhance productivity and quality control, but they must be chosen according to specific production needs. Thai Duong Plastics does not sell injection molding machines; however, drawing on extensive experience with modern equipment, we are ready to advise on efficient plastic processing solutions tailored to your business.
Read more: What Is Plastic Injection Molding? Processes, Advantages, and Latest Applications