How to Choose china vertical injection molding machine?

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Choosing the right vertical injection molding machine from China is crucial for your manufacturing efficiency. It's important to consider several factors to ensure that you select the best machine for your needs. According to most online sources, you should consider the tonnage, shot size, tie bar spacing, platen size, and injection pressure while also comparing prices and checking supplier credibility.

Understanding Injection Molding Machine Parameters

Buying an injection molding machine is not a small investment. Purchasing a machine that's too large can be a waste of money, whereas too small a machine might not be suitable. Therefore, choosing the right machine for the product is crucial for the buyer. Reputable suppliers often recommend the appropriate machine and offer guidance on how to make the best selection.

To systematically understand the selection process for an injection molding machine, follow the steps and detailed instructions below.

Nowadays, injection molding machines flood the market, but selecting one based solely on either injection capacity or clamping force is insufficient. An adequate balance of both must be achieved.

Injection weight is a key parameter for an injection molding machine. Expressed in grams or ounces, it refers to the maximum plastic injection weight that the injection device can achieve under optimal conditions. This parameter is significant for assessing the processing capacity of the machine. The test usually employs ordinary PS with a density of 1.05.

Steps to Determine the Injection Weight

1. Calculate the product weight first: W = product weight + gate system weight, where W is the weight required for injection. Take into account any specifics of your material and production requirements.
2. Adjust the calculation based on whether the injection-molded product is polystyrene (PS) or a different type of plastic. Make necessary conversions considering the plastic's density.
3. Use the results and machine manuals to select the appropriate injection molding machine.

Remarks: The relationship between injection weight and injection volume is more complex due to factors like the material's flow characteristics and gap infiltration between the barrel and the screw.

1. Lower-demand products require around 85% of the injection weight, while high-demand products like crystal items need around 75%.
2. Using a machine with a significantly excessive injection weight could lead to plastic degradation and machine inefficiency.

Important Factors: Clamping Force and Cavity Pressure

The clamping force is crucial to keep mold halves closed during injection. It involves:

1. The projected area (S) is the largest area seen from the mold opening and closing directions.
2. Cavity pressure (P), influenced by the number and size of gates, product thickness, material viscosity, and injection speed.
3. Classification of plastics by flow characteristics and viscosity grade helps in choosing accurate parameters for the clamping force.

Types of Injection Molding Machines

• Hydraulic Injection Molding Machine

  Hydraulic presses have been the predominant choice for most molders for a long time. While not as precise as other types, they remain widely used except in markets like Japan.

• Electric Injection Molding Machine

  Electric machines, also known as Electric Machine Technology (EMT), are quieter, faster, and more accurate than hydraulic ones, though they are usually more expensive.

• Hybrid Injection Molding Machines

  Hybrid machines combine features of both hydraulic and electric systems. They offer a balanced approach leveraging benefits of both technologies.

Why Choose a Chinese Manufacturer?

Collaborating with Chinese injection molding machine manufacturers offers several advantages:

Complete Industrial Chain

China boasts a world-leading industrial chain. Its rapid industry development ensures the availability of top-quality machines.

Cost Advantages

Lower labor costs, combined with extensive expertise and a complete supply chain, deliver significant cost benefits, making Chinese machines highly competitive and affordable.

You can establish relationships with other suppliers, ensuring support and resources for future needs.

Finding the Right Manufacturer

Finding the right manufacturer can impact your business's production efficiency and product quality. Here are some methods:

B2B Platforms

• Alibaba

  The largest foreign trade export website, offering many injection molding machine suppliers.

• Made in China

  Focused on promoting Chinese products, it only accepts domestic suppliers, ensuring quality and authenticity.

• Global Sources

  This platform focuses on facilitating international trade and offers robust services for foreign buyers.

Using Google

Directly searching for manufacturers through Google can yield professional and faster responses compared to B2B platforms.

Choosing the Right Manufacturer

Here’s how you can choose the most suitable manufacturer:

Check Reviews and Customer Feedback

Evaluating previous customer feedback helps gauge a supplier's reliability and service quality.

Investigate the "About Us" Section

Researching a manufacturer's website and reading their "About Us" section can provide valuable insights into their operational quality. Don’t hesitate to contact them if you need more information.

Direct Communication

Contact the manufacturer directly. Their response time and professionalism can reflect their business conduct and your potential collaboration experience.

By taking these steps, you can streamline your selection process and make an informed decision.

Final Thoughts

Investing in an injection molding machine is significant. Choosing the appropriate machine requires careful consideration and comparison while asking suppliers thorough questions. This guide aims to provide clarity on the process, aiding you in making a well-informed decision.

We recommend Log-Machine, a leading Chinese injection molding machine manufacturer. Log-Machine offers high-quality and competitively priced machines. Click here to learn more.

Contact us for more information.

China is recognized by the United Nations as having the most complete industrial system in the world. Plastic machinery manufacturing is one of the fastest-growing traditional industries. Injection molding machines play a vital role in the rapid development of the plastics industry. There are various models and applications, making it challenging for users to choose the best machine.

As a professional injection molding machine sales manager, I’d like to share tips on choosing the right injection molding machine in China.

1. Service

Evaluate whether the manufacturer shows a sincere attitude and provides exceptional service. Many Chinese injection molding machine manufacturers offer top-notch pre-sales and after-sales services, working closely with you to meet your needs.

Trusted Chinese suppliers play a crucial role in helping overseas companies meet budgetary and delivery needs while ensuring high quality and efficient processes.

2. Factory Environment

A well-maintained and clean factory environment often reflects a manufacturer’s strength. Good factories ensure cleanliness and a well-organized production environment, indicating reliable manufacturing practices.

3. Factory Size

China has numerous injection molding machine factories, from small units to large groups like Haitian. Depending on your budget, you can choose from small factories, mid-sized manufacturers with R&D teams, or larger, more expensive firms offering stringent quality standards.

4. Technical Parameters

When choosing an injection molding machine, compare main technical parameters through industry standards (vertical comparison) and similar standards internationally (horizontal comparison). Consider product material, shape, mold quality, production capacity, and automation level.

5. Safety

The safety of both the machine and operator is pivotal. Ensure the machine has reliable low-voltage protection systems, electromechanical-hydraulic safety features, and innovations like cold start prevention and nozzle protection to avoid accidents and injuries.

6. Degree of Automation

Modern injection molding machines should offer manual, semi-automatic, and fully automatic operations. Higher automation leads to higher production efficiency and safety. Machines should support functions like core extraction, hydraulic nozzle control, and incorporating robotics for unmanned operations.

7. Energy Saving and Environmental Protection

Choose machines designed for energy efficiency and minimal environmental impact. Look for features like electromagnetic heating systems and environmentally friendly materials. Machines should operate quietly with minimal noise pollution and zero hydraulic oil leakage.

8. Easy Maintenance

Ensure the machine is easy to maintain and repair. Components should be accessible, and parts should be standardized and versatile. Good maintenance practices are integral to reducing production costs and ensuring longevity.

Ningbo Kebida(Hystan) Plastic Machinery Manufacturing Co.,ltd. KebidPlas Machinery has been exporting since 1980, reaching over 30 countries with an annual output of more than 500 units. As a professional manufacturer, they offer integrated services and are looking for sales representatives.

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