Hydraulic, Electric, and Hybrid Plastic Injection Molding: Which Process is Right for You?

Hydraulic, Electric, and Hybrid Plastic Injection Molding Which Process is Right for You

For your production requirements, have you thought about plastic injection molding?

It might be confusing to select the best method with so many possibilities accessible. In the following article, we will delve into the realm of plastic injection molding and examine three primary processes: hydraulic, electric, and hybrid.

Large-scale manufacturing is ideally suited for hydraulic plastic injection molding’s high injection force. The disadvantages include slower cycle times and increased energy consumption.

On the other hand, electric plastic injection moulding enables exact control over injection variables, resulting in improved repeatability and energy economy. Nevertheless, it may have limited injection force for larger parts and a higher initial investment cost.

Hybrid plastic injection molding combines the perks of hydraulic and electric systems, and versatile material choices, offering optimal performance and efficiency.

Overview – Plastic Injection Molding Techniques

Overview – Plastic Injection Molding Techniques

Through careful consideration of the advantages and disadvantages of each approach, you will acquire the knowledge needed to make an informed choice regarding the plastic injection molding process that best suits your specific requirements.

So, without delay, let us delve into the captivating realm of hydraulic, electric, and hybrid molding techniques and uncover the perfect solution tailored to your needs.

1. Hydraulic Plastic Injection Molding

Hydraulic Plastic Injection Molding

It combines the benefits of both hydraulic and electric systems. Hydraulic plastic injection molding relies on hydraulic systems to drive the injection process. The molten material is injected into the mold cavity using a hydraulic-powered piston or screw.

This technique gives numerous advantages, including excessive injection pressures and huge injection capacities, making it feasible to mold large parts with intricate shapes.


Hydraulic plastic injection molding has numerous benefits that make it appropriate for large-scale production. Other than high injection force, manufacturing large components with complex shapes is among the benefits of the hydraulic injection molding technique.

This process can effectively generate the necessary pressure to inject the molten material into the mold cavity. However, it’s also critical to bear in mind the negative aspects.


It tends to have better strength intake compared to different methods. Additionally, the cycle times in hydraulic molding can be slower, which could have an effect on general manufacturing efficiency.

It would be best to consider these cons when planning to adopt a specific plastic injection molding technique for your manufacturing firm.


Hydraulic Plastic Injection Molding

These applications showcase the versatility of hydraulic plastic injection molding and its ability to produce a wide range of essential products in our daily lives.

Some brilliant examples include:

  • Automotive parts – bumpers, dashboards, interior trims, and door panels—are commonly manufactured.
  • Packaging containers – bottles, jars, and caps—are manufactured through hydraulic injection molding.
  • Household appliances – washing machine parts, refrigerator components, and vacuum cleaner casings often undergo hydraulic plastic injection molding during production.
  • Consumer Electronics – TV casings, computer peripherals, and mobile phone accessories are manufactured using hydraulic injection molding processes.
  • Toys and Games – toys, puzzles, action figures, and various gaming accessories

2. Electric Plastic Injection Molding

Electric plastic injection molding employs electric servo motors to drive the injection process. These motors provide precise control over the injection speed, pressure, and position, resulting in enhanced repeatability and accuracy.

This technique is often preferred for applications requiring high precision, such as medical devices, electronics, and optical components.


This molding offers several benefits that make it a favorable choice for certain applications. One key advantage is its energy efficiency, which utilizes electric servo motors to drive the injection process.

These drives offer specific management over technique variables, including injection speed, pressure, and position. This results in better repeatability and accuracy required for programs that depend on excessive precision, including scientific gadgets and optical components.


However, it’s far critical to recall the drawbacks as well. Electric plastic injection molding generally has a confined injection pressure compared to hydraulic systems, which might also limit its suitability for molding large components or substances requiring better pressures.

Moreover, in the event of a power outage or electrical system failure, electric molding machines may experience downtime until the issue is resolved, disrupting production schedules and impacting overall efficiency.


Electric Plastic Injection Molding

Sure! Here are some examples of merchandise that may be made using hydraulic plastic injection molding:

  • Plastic containers – Hydraulic plastic injection molding can produce various plastic containers, such as food storage containers, beverage bottles, cosmetic jars, and household product packaging.
  • Automotive components – Many automotive parts are manufactured using hydraulic plastic injection molding, including dashboards, interior trim, door panels, steering wheels, and various engine components.
  • Electrical enclosures – commonly employed to produce electrical enclosures, such as junction boxes, control panels, and housing for electronic devices.
  • Medical devices – Several medical devices, such as syringes, inhalers, IV components, and diagnostic equipment, can be manufactured using hydraulic plastic injection molding.
  • Toys and games – Hydraulic plastic injection molding is widely used in the production of plastic toys and games, including action figures, building blocks, puzzles, and board game components.
  • Consumer electronics – Numerous consumer electronic products are made using hydraulic plastic injection molding, such as computer keyboards, remote controls, mobile phone cases, and audio/video equipment housing.
  • Packaging materials – You can use them to manufacture various packaging materials, including plastic caps, closures, lids, and blister packs.

3. Hybrid Plastic Injection Molding

Hybrid Plastic Injection Molding

Hybrid plastic injection molding combines the advantages of both hydraulic and electric systems. It utilizes a combination of hydraulic and electric components to optimize performance and efficiency.

The hydraulic system drives the mold closing and plastic injection stages in this process, while the electric servo motors control the plasticizing and injection unit.

With this method, you can find applications for hybrid molding in various areas, including packaging, consumer electronics, and automotive part manufacturing.


Hybrid plastic injection molding offers several benefits that make it a favourable choice for many applications. This process optimizes performance and efficiency by utilizing a combination of hydraulic and electric components.

One of the key advantages is that it harnesses the high injection force of hydraulic systems along with the precise control of process variables provided by electric servo motors. This allows for versatility in material choices and enables efficient energy usage.


However, the disadvantages must also be considered. The hybrid plastic injection molding process involves a more complex design due to the integration of both hydraulic and electric components.

This complexity can result in higher initial setup and equipment costs. Additionally, hybrid systems require maintenance of both hydraulic and electric components, which adds to the overall maintenance requirements of the process.


IV connectors

Certainly! Several examples of goods that may be produced employing hybrid plastic injection molding are provided below:

  • Automotive components – Hybrid plastic injection molding can manufacture automotive parts such as bumpers, exterior panels, interior trim, and door handles.
  • Electronic devices – Many electronic devices benefit from hybrid plastic injection molding, including computer casings, smartphone frames, tablets, and gaming console components.
  • Medical equipment – Hybrid plastic injection molding is commonly employed in the production of medical equipment, such as syringe components, IV connectors, medical device housings, and surgical instrument handles.
  • Consumer appliances – Various consumer appliances can be made using hybrid plastic injection molding, including refrigerator parts, washing machine components, dishwasher panels, and microwave casings.
  • Sporting goods – Hybrid plastic injection molding is used to manufacture sporting goods such as golf club heads, bicycle frames, tennis racket handles, and ski bindings.
  • Packaging solutions – Hybrid plastic injection molding can be applied to create innovative packaging solutions, including customized bottles, containers, closures, and dispensers.
  • Aerospace components – Certain aerospace components benefit from hybrid plastic injection moldings, such as interior cabin panels, seat components, control knobs, and ventilation system parts.

Choosing the Right Plastic Injection Molding Process

Choosing the Right Plastic Injection Molding Process

When selecting the suitable plastic injection molding process for your project, it is crucial to consider multiple factors. Begin by thoroughly analyzing your product requirements, which include elements such as size, complexity, and precision.

Hydraulic molding is advantageous for large and complex parts, while electric molding excels in high-precision applications. It offers a versatile solution for various product types.

You may make an educated decision by following these steps:

Comprehend Your Requirements:

Comprehend Your Requirements

Develop a clear understanding of the specific specifications for your product, including its material grade, intended functionality, production volume, complexity, and desired size. This will allow you to determine the specific standards that your plastic injection molding process needs to fulfil.

Evaluate the Production Volume:

By assessing the anticipated quantity of your product’s production, you can determine the most suitable approach. If you’re looking for low-volume manufacturing techniques with flexibility and shorter lead times, 3D printing or CNC machining may be preferred.

Conversely, traditional injection molding processes can be more cost-effective in high-volume production.

Assess Material Selection:

Assess Material Selection

Different plastic materials have varying properties, such as strength, flexibility, temperature resistance, and cost.

Choose a plastic material that best satisfies your product’s demands after considering those factors. Ensure that the material is appropriate for injection molding as well.

Consider Part Complexity:

Evaluate the complexity of your product design. If your product has intricate features, undercuts, or thin walls, you might need more advanced molding techniques like multi-cavity molds, over-molding, or insert molding. These techniques may require specialized equipment and expertise.

Cost Considerations:

Cost Considerations

Compare the cost implications of different injection molding processes. Consider factors such as tooling costs, material costs, cycle times, labor costs, and any secondary operations required. Evaluate the long-term viability and scalability of the chosen process in relation to your budget.

Engage With Experts:

Engage With Experts

Consult with experienced professionals in the plastic injection molding industry. They can provide valuable insights, suggest suitable processes, and help optimize your design for manufacturability.

Conduct Feasibility Studies:

Consider running feasibility studies or small-scale trials to validate the chosen plastic injection molding process. This can help identify any potential challenges, optimize the process parameters, and ensure the desired product quality is achievable.

Comparison of Benefits and Drawbacks:

Comparison of Benefits and Drawbacks

Hydraulic Plastic Injection Molding:

  • Benefits – High injection force for larger and complex parts, suitable for high-volume production, flexibility in material choices.
  • Drawbacks – Higher energy consumption, slower cycle times, and required maintenance of hydraulic systems.

Electric Plastic Injection Molding:

  • Benefits – Precise control over injection variables, enhanced repeatability and accuracy, energy-efficient operation.
  • Drawbacks – Limited injection force for larger parts, higher initial investment cost.

Hybrid Plastic Injection Molding:

  • Benefits – Combines advantages of hydraulic and electric systems, optimal performance and efficiency, and versatile material choices.
  • Drawbacks – Complex design and setup require maintenance of both hydraulic and electric components.

Considering these factors, you can choose the right plastic injection molding process that aligns with your product requirements, production volume, budget, and timeline. Remember to seek expert advice when needed and continuously evaluate and improve your process as you gain more experience.


In conclusion, choosing the right plastic injection molding process is crucial for successful product manufacturing. To decide which technique best meets your unique requirements, weigh the advantages and disadvantages of each.

Hydraulic plastic injection molding is preferred for larger, more complex parts but may be less energy-efficient. Electric plastic injection molding excels in precision applications and offers energy efficiency benefits.

Hybrid plastic injection molding combines the advantages of hydraulic and electric systems, providing versatility and balance.

Consider your product needs, financial limits, and manufacturing volume carefully before making a choice. It is also recommended to get the advice of specialists in the industry to secure the best possible outcome for your project.

Continuous review and development of the selected process will help in long-term success and product quality.

Kemal Manufacturing – Your Trusted Partner for High-Quality Plastic Injection Molding

Kemal Manufacturing - Your Trusted Partner for High-Quality Plastic Injection Molding

Don’t settle for anything less than the best when it comes to plastic injection molding. Choose Kemal Manufacturing and experience the highest quality, efficiency, and customer satisfaction. Contact us today and let us bring your plastic manufacturing vision to life!

“Get High-Quality Plastic Injection Molding With Kemal”

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