Why do Thin-Walled Products Require Specialized Injection Molding Machines

Why Do Thin Walled Products Require Specialized Injection Molding Machines

In the world of manufacturing, the production of thin-walled products presents a unique set of challenges. These challenges, stemming from the inherent properties of thin-walled designs, necessitate the use of specialized injection molding machines. But why is this the case? Let’s delve deep into the intricacies of injection molding and uncover the reasons behind this requirement.


Thin-walled products, such as food containers, beverage cups, and small packaging containers, require specialized injection molding machines because the walls of these products are so thin that the injection molding process needs to be precisely controlled to ensure that the final product has the required strength and structural integrity.
One of the key challenges in thin wall injection molding is that the thin walls of the product require precise control of the injection process to ensure that the final product has the required strength and structural integrity. This can be achieved through the use of dedicated injection molding machines specifically designed to produce thin-walled products

Understanding Thin-Walled Products

Before we dive into the specifics of the machinery, it’s essential to understand what constitutes a thin-walled product. In the realm of injection molding, a product is considered “thin-walled” when its wall thickness is less than 1mm. Such products include disposable containers, lids, and various other items that require lightweight and cost-effective solutions.

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key Features

Thin wall injection molding machines are distinguished from standard injection molding machines by several key features.

High Injection Speeds:

Thin wall products require rapid injection of polymer material into the mold to produce thin walls with a high level of detail. This can be achieved by using high injection speeds ranging from 500 to 1000mm/s or higher.

High injection pressures:

To ensure that the polymer material can fill the mold and form the desired shape, even if the walls are very thin, thin-wall injection molding machines typically use high injection pressures. These can range from 70 to over 180 MPa.

Precise Temperature Control:

Maintaining a consistent and accurate temperature of the polymer material is important for producing high-quality thin-walled products with consistent properties. Thin wall injection molding machines can use advanced temperature control systems to achieve this.

Advanced Clamping Systems:

Thin wall products require high levels of pressure on the mold to achieve the desired level of structural integrity. Thin wall injection molding machines typically use advanced clamping systems that are capable of applying high pressure to the mold.

In addition to these key features, thin wall injection molding machines may be equipped with specialized screw designs or barrel configurations to help improve polymer material flow and reduce the risk of defects in the final product. Some machines may also be designed to be energy efficient to reduce production costs and improve the overall sustainability of the manufacturing process. The use of robotics and automation can also be integrated into thin-wall injection molding machines to further improve the efficiency and precision of the production process. For example, robots can be used to load and unload molds, or to perform quality inspections on finished products.


The Need for Specialized Machines

High-Speed Injection:

To counteract the rapid cooling rates and flow resistance, the molten plastic needs to be injected at high speeds. Specialized machines are designed to achieve these speeds, ensuring the material fills the mold before it starts to solidify.

Enhanced Pressure Control:

Achieving the right pressure is a delicate balance. Too little, and the mold won’t fill completely. Too much, and you risk damaging the mold or the product. Specialized machines offer precise pressure controls to strike this balance perfectly.

Precision and Consistency:

Any minor defect or inconsistency in a thin-walled product can lead to its failure. Machines tailored for thin-walled production come with advanced control systems ensuring each product is of the highest quality.

Advanced Cooling Systems:

Uniform cooling is paramount to prevent deformities. Specialized machines come equipped with advanced cooling systems that ensure even and rapid cooling, maintaining the product’s shape and integrity.

Optimized Material Flow:

Certain plastics, known for their superior flow characteristics, are preferred for thin-walled products. Specialized machines are optimized for these materials, ensuring a consistent flow and reducing the chances of defects.

Balanced Clamping Force:

While a strong clamping force is essential to keep the mold closed under high pressures, excessive force can damage the mold. Machines designed for thin-walled products ensure the mold is held securely without causing any harm.

Gentle Ejection Mechanisms:

Ejecting a thin-walled product from the mold requires care. These products can be fragile, and a rough ejection can lead to breakage. Specialized machines have systems in place for a smooth ejection process.

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Efficiency and Cycle Times:

For economic viability, thin-walled products often need to be produced in high volumes and at fast cycle times. Machines tailored for this purpose are designed to achieve rapid cycle times without compromising on quality.

In addition to the technical capabilities of the injection molding machine, the overall design and layout of the production line can significantly impact the efficiency and quality of the thin-walled products produced. Factors to consider include the layout of the equipment, material handling systems, and the overall flow of the production process.
In summary, thin-wall injection molding is a specialized manufacturing process that requires the use of specialized injection molding machines to produce high-quality products Thin-walled products have the required strength and structural integrity. These machines are designed with high injection speeds, high injection pressures, precise temperature control, and advanced clamping systems to meet the specific requirements of the thin wall injection molding process.


The production of thin-walled products is not just about reducing material usage or achieving lightweight designs. It’s a complex process that demands precision, speed, and consistency. Standard PVC plastic injection molding machines, while versatile, might not be equipped to handle the unique challenges posed by thin-walled designs. This is where specialized machines come into play, ensuring that the production process is efficient, cost-effective, and yields high-quality products.

In the ever-evolving world of manufacturing, it’s crucial to have the right tools for the job. And when it comes to thin-walled products, specialized injection molding machines are undoubtedly the tools of choice.

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Frequently Asked Questions

Daoben has the SOP (Standard Operation Procedure) and all the production steps must follow up this SOP. Every machine needs at least automatic running over 72 hours and must be inspected carefully before shipment.

Actually, the delivery time of the machines is depended on the machine options. Normally, the delivery time of a standard machine could be within 1-2 months.

12 months warranty after shipment for mechanical parts, hydraulic parts, and electric components excluding the screw and barrel 6 months (not including use for recycled material or reclaimed material).

Yes, Daoben will provide one set of standard spare parts to the customer including a heater, filter, screw head, screw washer, checking ring, sealings, etc.

Surely, we have experienced technical engineers for oversea service, they would help you install machines and support training to workers also. Currently, we provide visits online by video call for COVID-19.

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