What is a horizontal injection molding machine?

A horizontal injection molding machine is a plastic processing machine that makes plastic products by forcing melted plastic into a mold. The machine is called horizontal because the mold opens and closes horizontally, unlike a vertical injection molding machine, where the mold opens and closes vertically. The machine heats up plastic bits or grains until they become a liquid mix. Then, the machine pushes this mix into a mold and fill the mold cavity, where it gets cold and hardens into a shape that the mold has.

What is a vertical injection molding machine?

A vertical injection molding machine is a type of plastic processing machine that works the same way as a horizontal injection molding machine, but it is oriented to operate on the vertical axis. This means that the mold opens and closes vertically, instead of horizontally. A vertical injection molding machine is suitable for insert molding applications, where components can be easily loaded into the mold and held in place by gravity before overmolding. A vertical injection molding machine can be hydraulic, electric, or hybrid, and it can have different clamping forces and injection units depending on the task.


What is the difference between vertical injection molding machine and horizontal injection molding machine?

The main difference between the two is the orientation of the mold and the injection unit.

Pros of Horizontal Injection Molding Machines

Higher production rates

Horizontal machines have a larger injection unit and can be more productivity in less time.
Greater stability

Horizontal machines have a lower center of gravity, making them less prone to vibrations and movements.
Easier accessibility

Horizontal machines allow for easier access to the mold and the injection unit for maintenance and adjustments, and also easy to install an automatic robot.
Better for larger parts

Horizontal machines are better suited for producing larger parts, as they have more space for the mold.

Cons of Horizontal Injection Molding Machines

Higher costs

Horizontal machines are generally more expensive than vertical ones.

Larger size

Horizontal machines are larger in size, making them less suitable for smaller facilities or production lines.

More complex

Horizontal machines are more complex and require more expertise to operate and maintain.
Greater energy consumption

Horizontal machines consume more energy than vertical ones.

Pros of Vertical Injection Molding Machines

Lower costs

Vertical machines are generally less expensive than horizontal ones.
Smaller size

Vertical machines are smaller in size, making them more suitable for smaller facilities or production lines.
Simpler design

Vertical machines are less complex and easier to operate and maintain.
Lower energy consumption

Vertical machines consume less energy than horizontal ones.

Cons of Vertical Injection Molding Machines

Lower production rates

Vertical machines have a smaller injection unit and can produce fewer parts in the same amount of time.
Less stability

Vertical machines have a higher center of gravity, making them more prone to vibrations and movements.
Limited accessibility

 Vertical machines have limited access to the mold and the injection unit for maintenance and adjustments.
Not as suitable for larger parts

Vertical machines have less space for the mold and are not as well-suited for producing larger parts.

In summary, the choice between a vertical or horizontal injection molding machine will depend on the specific needs and requirements of the manufacturer, such as the size and complexity of the parts to be produced, the available space, and the budget.

 Horizontal injection molding machines use cases

  • Parts for cars, such as door panels, dashboard components, and engine parts.
  • Large household appliances, such as dishwashers, washing machines, and refrigerators.
  • Big and complex medical devices, such as prosthetics and diagnostic equipment.
  • Various industrial parts, such as valves, pumps, and gears.

Vertical injection molding machines use cases

  • Small electronic components, such as circuit boards, adapters, and connectors.
  • Small consumer goods, such as tools, toys, and personal care products.
  • Small and intricate medical devices, such as diagnostic instruments, catheters, and syringes.
  • Smaller automotive parts, such as instrument panels, switches, and buttons.

To sum up, the manufacturer should choose a horizontal or vertical injection molding machine based on the specific features and needs of the parts to be made, such as the size, complexity, and production volume of the parts. There are many types of injection molding machines, and choosing the right injection molding machine will save you costs and increase output.