Thermo-regulated injection systems (Cold Runner Block – CRB) are by now largely used to mold a wide variety of products.
Its main function is to maintain the compound temperature at a controlled level before injecting it near or inside the mold cavity. This offers outstanding benefits such as reduction of raw material waste by reducing the runners,cut-down of cycle times with major increase of productivity, no more compound burns. All this while maintaining the quality of the moulded product.
STANDARD THERMO-REGULATED BLOCKS
STANDARD THERMO-REGULATED BLOCKS are:
- Sturdy machined steel blocks including runners to distribute the raw material and cooling fluid circuits;
- Free-flow nozzles or stopper nozzles. Stoppers can be activated hydraulically or pneumatically.
- The removable plate enables to replace the compound and the user can verify the cleaning status visually, thus reducing risk of pollution by other compounds.
- Specific thermo-regulation circuits developed inside the nozzles cover most of the surface of the rubber distribution circuits, created with soft bends to reduce the stress on the compound.
WHY TO CHOOSE A COLD RUNNER BLOCK
Rubber moulding companies value the strategic role played by thermo-regulated blocks (CRBs) to enhance production cycles while reducing waste material.
Using a CRB means adopting an injection system able to keep the compound at pre-vulcanization temperature before injecting it near or into the mold.
This is made possible thanks to:
- insulation from the heat source;
- a controlled cooling system.
BENEFITS
- Better handling of difficult, highly accelerated compounds.
- Reduced risk of burning the compound.
- It is possible to inject the compound in several points of the mold.
- It is possible to use multiple-cavity molds.
- Reduction of non-conformities.
- Homogeneity and repeatability of molded items.
CRBs help you meet the needs of those major customers in the rubber industry who are no longer satisfied with the cheapest-cost-perpiece policy and who are now looking for:
- Manufacturers are able to solve customers’ problems by anticipating needs and opportunities.
- Technical items and gaskets with increasingly higher performance to comply with the most demanding regulations.
- Reliable production timing.
