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Precautions and Suggestions for Quality Inspection Process of Injection Molding Machines

May 06, 2024

What is a injection molding machine?


A injection molding machine is a type of machine used in the manufacturing process of plastic parts and products. It works by injecting molten plastic material into a mold to create a specific shape and size. The machine consists of a hopper, an injection unit, a clamping unit, and controls. The plastic material, usually in the form of pellets, is fed into the machine through the hopper. The injection unit melts the plastic and injects it into the mold under high pressure. The clamping unit then holds the mold closed while the plastic cools and solidifies. Once the part is cooled and solidified, it is ejected from the mold and the process is repeated.


As technology continues to advance, the injection molding industry has seen tremendous growth over the years. In order to maintain the quality of products and ensure the satisfaction of customers, it is crucial to have a thorough quality inspection process in place for injection molding machines. As a leading manufacturer in the injection molding industry, Hommar has extensive experience and knowledge in this area. 

Fishing lure Injection Machinery

Peeler Production Machine

Scissor Manufacturing Machine

"C" Injection Molding Machine

Slicer Making Machines


PartⅠ-Pay Attention to Cylinder Temperature Distribution:


The temperature of the cylinder is a crucial factor in the injection molding process. To ensure the quality of the final product, it is essential to pay close attention to the temperature distribution in the cylinder. Uneven temperature distribution can lead to defects such as warping, sink marks, and flow marks in the molded product. Therefore, it is crucial to regularly check and adjust the temperature distribution in the cylinder during the quality inspection process. Hommar's injection molding machines are equipped with advanced temperature control systems to ensure consistent and precise temperature distribution.


PartⅡ-Monitor Clamping Force:


The clamping force of an injection molding machine is responsible for holding the mold in place during the injection process. It is essential to monitor and maintain the proper clamping force throughout the production process. Insufficient clamping force can result in flashing, while excessive clamping force can cause damage to the machine and mold. Regularly checking and adjusting the clamping force during the quality inspection process can prevent these issues and ensure the quality of the final product.


PartⅢ-Control Mold Opening/Closing Speed:


The mold opening and closing speed is another important factor in the injection molding process. The speed should be carefully controlled to prevent damage to the mold and machine, as well as to avoid defects in the final product. The too fast closing speed can cause the molded product to stick to the mold, resulting in incomplete filling and product deformation. On the other hand, a slow opening speed can cause the molded product to shrink and distort. During the quality inspection process, it is crucial to check and adjust the mold opening and closing speed to ensure the smooth and efficient operation of the machine.


PartⅣ-Consider Cooling Time:


The cooling time significantly affects the quality of the molded product. If the cooling time is too short, the product may not have enough time to solidify, resulting in warping and deformation. On the other hand, a long cooling time can cause production delays, leading to increased costs. During the quality inspection process, it is essential to monitor and adjust the cooling time to ensure that the product cools down sufficiently and does not overheat.


PartⅤ-Energy Efficiency:


In today's world, energy efficiency is a crucial factor in every industry. Injection molding machines consume a significant amount of energy, and it is essential to consider energy efficiency during the quality inspection process. Regularly check the energy consumption of the machine and implement energy-saving measures such as using energy-efficient heaters, optimizing the heating and cooling cycle, and using high-performance motors. Hommar's injection molding machines are designed with energy efficiency in mind, helping to reduce costs and minimize the environmental impact.


PartⅥ-Consider Industry-Specific Needs:


As a leading manufacturer in the injection molding industry, Hommar understands that different industries have different requirements for their products. For example, in the energy industry, the product may need to withstand high temperatures and pressure, while in the construction industry, the product may need to be durable and able to withstand heavy loads. Therefore, it is essential to consider the specific needs of the industry when conducting quality inspections. Hommar's injection molding machines are designed to cater to the needs of various industries, providing quality and reliability for every product.

Moreover, Hommar places a strong emphasis on conducting comprehensive quality inspections throughout the manufacturing process. This includes careful monitoring of material selection, ensuring the correct injection pressure, performing regular maintenance of the machine, and inspecting finished products for dimensional accuracy, visual defects, and functionality.


By adhering to these precautions and implementing a stringent quality inspection process, Hommar ensures that the injection molding machines deliver high-quality products to various industries, including the energy and construction sectors. We are committed to meeting the unique requirements of each industry and providing reliable and efficient solutions for our clients' plastic manufacturing needs.


How does an injection molding machine work?


A: An injection molding machine works by melting plastic pellets or granules through high temperatures and pressure and injecting the molten plastic into a mold. The molten plastic then cools and solidifies, taking on the shape of the mold. The mold is then opened and the finished product is ejected.


Q: What materials can be used in an injection molding machine?


A: Most commonly, injection molding machines are used to process thermoplastics such as ABS, polypropylene, and polystyrene. However, some machines can also process other materials such as rubber, metal, and thermosetting plastics.


Q: What are the advantages of using an injection molding machine?


A: There are several advantages of using an injection molding machine including high production rates, low labor costs, precision and consistency in product dimensions, and the ability to produce complex and intricate designs.

Q: What are the different types of injection molding machines?


A: There are several types of injection molding machines, including hydraulic, electric, and hybrid machines. Hydraulic machines use fluid pressure to generate clamping force, electric machines use a motor and ball screw to generate clamping force, and hybrid machines combine the features of both.


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