Gas Assisted Molding

Gas Assisted Molding

Solve complicated Shape. Reduction in Part Weight. Improved Quality.

H.H. Precision Mould Sdn. Bhd. (HH) has utilized gas assist molding technology for plastic injection molding in a many areas of applications for over 28 years. This has given our OEMs customer with numerous advantages for custom plastic injection molded plastic parts.

Gas assist injection molded plastics are a great alternative for companies looking to reduce part weight, decrease cycle time, and reduce cost without compromise quality or design options.

The gas assisted injection technology offered by HH facilitates plastic injection molding of thicker sections and hollow parts.

The advantages of the gas assisted injection technologies offered by HH include:

  • Achieve thicker wall sections
  • Lower Piece Price
  • Better Part Quality
  • Shorter Cycle Times
  • Greater Design Freedom
  • Better surface cosmetics
  • Reduce finishing and painting
  • Elimination of sink & warp
  • Better dimensional control
  • Increased design options for complex parts, reducing multiple part assemblies, and metal to plastic conversions
  • Enables use of smaller plastic injection molding presses
  • Reinforces ribbed parts

The HH team would be please to discuss the appropriateness of gas assisted injection Molding for your next project.

Photo: Plastic injection moulded product using gas injection molding technology

What is gas-assisted injection molding, and how does it differ from standard injection molding?

Compared with standard injection moulding that fills the cavity completely and forms solid parts, gas-assisted molding creates hollow sections that can reduce weight and help prevent sink marks and warpage. Gas-assisted injection molding is a specialized molding process where gas is introduced into the molten plastic during molding to help form hollow sections or optimize material distribution. Compared with standard injection molding, it can reduce part weight, minimize sink marks, and improve structural efficiency for suitable designs.

What benefits does gas-assisted molding offer compared to traditional molding?

Main benefits include weight reduction, reduced sink marks, less warpage, and improved surface appearance. Its main benefits can include reduced weight, improved stiffness-to-weight performance, less material usage in selected areas, better surface appearance in thicker sections, and potential cycle-time or design advantages for the right application.

What kinds of plastic materials are suitable for gas-assisted molding?

Currently, we use ABS for gas-assisted molding projects. Material selection depends on the product structure, wall thickness, performance requirements, and gas-assisted design feasibility. Many thermoplastics can be considered, subject to engineering review.

What types of products or parts are ideal for gas-assisted molding?

This process is suitable for hollow parts and other parts that benefit from lighter weight and better rigidity. Gas-assisted molding is often suitable for larger plastic parts, thick-section parts, hollow-style components, handles, frames, and structural parts that benefit from weight reduction and improved rigidity.

What is the minimum order quantity (MOQ) or batch size for a gas-assisted molding project?

MOQ depends on part size, tooling, and project economics, so it is reviewed case by case. MOQ depends on tooling complexity, part size, development requirements, and production economics. We can evaluate this case by case.