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35 Years of Experience: Enhancing Production Efficiency by Understanding the Operations of Injection Molding Machines

35 Years of Experience: Enhancing Production Efficiency by Understanding the Operations of Injection Molding Machines

Dec 15 , 2023

35 Years of Experience: Enhancing Production Efficiency by Understanding the Operations of Injection Molding Machines


Editor (E): Greetings, everyone! Today, we are fortunate to have Mr. Wang, an engineer with over 35 years of experience in the injection molding industry, here to share his expertise. Mr. Wang, thank you for joining us.


Mr. Wang (W): Hello, I'm delighted to share my experience with everyone.


E: Injection molding machines bear resemblance to syringes used for injections in terms of their working principles. Could you please provide a detailed explanation of how injection molding machines operate?


W: Absolutely. Injection molding machines operate similarly to syringes used for medical injections. They utilize the pushing force of a screw to inject the already plasticized molten plastic into a closed mold cavity. After solidification and shaping, the final product is obtained. You can imaginatively compare the process to receiving a vaccine at a hospital.


E: That's a vivid analogy. Now, could you elaborate on the specific steps involved in the operation process of injection molding machines?


W: Injection molding can be seen as a cyclic process comprising five main steps: metering and feeding, melting and plasticization, pressure injection, cooling and solidification, and mold opening and ejection. These steps align and complete the entire injection molding process.


E: Understanding the working principles and steps of injection molding machines, I'd like to request your attention to the key points to consider when operating these machines.


W: When operating an injection molding machine, various actions can be controlled through the keyboard, electrical control cabinet, and hydraulic system. These actions include controlling the injection process, feeding process, injection pressure and speed, as well as choosing the ejection method. Additionally, monitoring the temperature, current, and voltage of different sections of the barrel, and adjusting the injection pressure and back pressure are also essential.


E: What are the different modes of operation for injection molding machines?


W: Typically, injection molding machines can be categorized into manual, semi-automatic, and fully automatic operations. Manual operation requires the operator to manually control each action by toggling switches. During semi-automatic operation, the machine can automatically perform certain tasks, but still necessitates the operator to execute specific actions. In fully automatic operation, the machine proceeds to the next work cycle automatically after completing one, without requiring downtime for control and adjustment.


E: That sounds very convenient. How should we choose the appropriate operation mode for injection molding during production?


W: Generally, the suitable operation mode, whether manual, semi-automatic, or fully automatic, should be selected based on the production needs. In semi-automatic and fully automatic operations, the work procedures are predetermined within the system, requiring operators only to adjust certain parameters such as speed, pressure, and time according to their specific requirements. This approach helps avoid confusion in work procedures caused by operators mistakenly adjusting the wrong controls. Before adjusting every action, it is advisable to begin with manual operation, ensuring the normal execution of each action, and then proceed to semi-automatic or fully automatic operation.


E: We sincerely appreciate Mr. Wang's detailed explanation and insights, which greatly contribute to our understanding of the working principles and key operational aspects of injection molding machines. If readers have any further questions or require additional information, feel free to contact us. We will provide the latest and most comprehensive resources on injection molding machines.


W: Thank you for inviting me. I'm glad to have shared my experience with everyone. I hope my insights will be beneficial for those involved in operating injection molding machines. Thank you.


E: Thank you, Mr. Wang, for sharing your expertise, and thank you all for tuning in. If you have any questions, please don't hesitate to reach out. We look forward to our next exchange with you.


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