Production processes
The right process based on your needs
At HGF, we have a number of different production methods and processes where we always choose the ones that are best suited for your particular product.
Injection
In many cases, injection molding is preferred as the tool is closed during the process and already preheated material is injected into the cavities.
This has several advantages such as:
This has several advantages such as:
- Positioning and locking of constituent components
- Shorter cycle times
- Evener material distribution in cavities
- Less beard
- Increased possibility of automation
- Less operator dependency compared to compression
Injection-Transfer
In transfer molding, one or more preformed blanks are placed in a mold pot. The press is then closed and a piston goes down into the pot and pushes the rubber through the injection holes.
As rubber is a poor conductor of heat, this method is preferable to compression molding/moulding, as the pressure drop in the injection hole changes from pressure to heat energy.
This process has several advantages such as:
As rubber is a poor conductor of heat, this method is preferable to compression molding/moulding, as the pressure drop in the injection hole changes from pressure to heat energy.
This process has several advantages such as:
- Shorter cycle time and curing time compared to compression molding
- Less beard than with compression molding
- Greater possibility for positioning of cast-in components
Compression
Compression molding involves manually placing unvulcanized material, cold or preheated, into an open mold.
This process has several advantages such as:
This process has several advantages such as:
- Often lower tooling costs than with injection molding
- Good for smaller series
- When manufacturing reinforced details
- A suitable process when manufacturing larger parts that have a high material volume
Material Compounding
We are proud that we are self-sufficient when it comes to the materials we use in rubber molding.
Already when HGF was founded in the 40s, we had our own mixing department and that is something we have taken notice of and which we see as a great advantage. This is because we have full traceability while we are not dependent on an external supplier. These factors together with the fact that our technicians can develop customized materials based on their specifications and wishes make our customers choose HGF as a supplier.
We have the opportunity to mix materials both in the laboratory and in our mixing department, which gives us a high degree of flexibility both during material development, prototype manufacturing, in projects and during series production.
Already when HGF was founded in the 40s, we had our own mixing department and that is something we have taken notice of and which we see as a great advantage. This is because we have full traceability while we are not dependent on an external supplier. These factors together with the fact that our technicians can develop customized materials based on their specifications and wishes make our customers choose HGF as a supplier.
We have the opportunity to mix materials both in the laboratory and in our mixing department, which gives us a high degree of flexibility both during material development, prototype manufacturing, in projects and during series production.