What is LSR material?
LSR materials include standard silicones and specific grades to fit various part applications and industries like medical, automotive, and lighting. Since LSR is a thermosetting polymer, its molded state is permanent—once it is set, it can’t be melted again like a thermoplastic.
How does the LSR process work?
The two component materials required for the LSR process are metered to the injection unit by a special delivery system. 2. The materials pass through a static mixing device… 3. … and into the machine barrel. 4. To prevent premature curing of the combined LSR materials, the barrel is fitted water jackets that allow closed loop thermal regulation.
What is LSR tooling for silicone molding?
The LSR tooling can be the lengthiest step and largest investment in the silicone rubber molding process. However, LSR’s ability to flow into very thin cross-sections, tight radii and thick/thin features make the mold design simpler.
Where is the LSR injection unit located on the machine?
The LSR injection unit is usually on the main axis of the machine, but can also be arranged in a lateral or vertical position. The table below shows the compatibility of LSR with a range of thermoplastic materials when used in combination, in a multi-material application.
