Manufacturing process of Injection Machine

June 14, 2024

In the world of plastics manufacturing, injection molding machines are pivotal in mass production, enabling the efficient creation of intricate and durable plastic components. Hommar, a renowned Injection Machine manufacturer, exemplifies excellence in this industry with its state-of-the-art manufacturing processes. This article delves into the intricate steps involved in producing an injection machine.

Introduction to Injection Machines

An injection molding machine, often simply referred to as an injection machine, is designed to fabricate plastic parts by injecting molten material into a mold where it cools and solidifies into the final product. These machines are crucial in various industries, including automotive, consumer electronics, and medical devices, due to their ability to produce high volumes of identical parts with precision.

Step 1: Design and Engineering

The manufacturing process begins with a detailed design phase, where engineers at Hommar use advanced CAD software to draft the specifications of the machine. This phase focuses on creating a machine that is not only efficient but also robust and user-friendly. Key parameters such as clamping force, which typically ranges from 5 to 6,000 tons, and injection pressure, which can go up to 2,000 bars, are meticulously calculated to ensure optimal performance.

Step 2: Material Selection

Choosing the right materials is crucial for ensuring the durability and efficiency of the injection machines. Hommar selects high-grade steel for the machine frames and other structural components, considering properties such as tensile strength and thermal conductivity. For the moving parts, materials like hardened alloys are chosen to withstand the high pressures and temperatures involved in plastic injection molding.

Step 3: Component Fabrication

Once the design is finalized and materials are selected, the next step involves the fabrication of the machine components. This is done using precision machining tools such as CNC (Computer Numerical Control) machines. Components like the injection screws, which require a tolerance level of less than 0.01 mm for effective functioning, are manufactured during this phase. The precision in this stage is crucial as it directly affects the machine's ability to accurately and consistently inject molten plastic.

Step 4: Assembly

The assembly of an injection machine at Hommar is a meticulous process where various components are integrated. This includes the installation of the hydraulic and electronic systems that will drive the machine. Each component is assembled manually by skilled technicians, ensuring that every part is correctly aligned and secured. Special attention is given to the assembly of the clamping and injection units, as these are critical for the precise control of the molding process.

Step 5: Control Systems Integration

Modern injection machines are equipped with sophisticated control systems that allow for precise adjustments of various parameters like temperature, pressure, and injection speed. Hommar integrates state-of-the-art control systems into its machines, ensuring that they are capable of delivering high precision and repeatability. These systems are tested rigorously to confirm that they can handle real-world manufacturing demands.

Step 6: Testing and Quality Assurance

Before any injection machine leaves the factory, it undergoes extensive testing to ensure it meets the high standards set by Hommar. This includes dry-run tests to check the mechanical functionality and software calibration tests to ensure that the control systems are responsive and accurate. Parameters such as injection speed (up to 500 mm/s) and mold opening/closing speeds are carefully monitored and adjusted to meet specific production requirements.

Step 7: Final Inspection and Shipping

The final step in the manufacturing process is a comprehensive inspection to ensure that every aspect of the machine is functioning optimally. Once approved, the machines are packed and prepared for shipping. Hommar uses robust packaging solutions to protect the machines during transportation, ensuring they arrive at customer locations in pristine condition.


The manufacturing process of an injection machine at Hommar is a testament to the company's commitment to quality and innovation. By controlling every aspect of production, from design through to final inspection, Hommar ensures that each injection machine is not only a product of advanced engineering but also a reliable tool for high-volume plastic manufacturing.

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