Improve the performance of your molding process with the only modular CRB able to keep the compound in a pre-vulcanization state and get rid of all the issues of the other CRBs currently available on the market.

  • No more long starting time
  • No more changes and connection and wiring
  • No more endless spending for maintenance
  • No more cumbersome and dangerous handling
  • No more waste of compound and non-conformities
Cold Runner Block C3 Patented by NCN Technology
Time Saving


  • Compound change in 20 minutes, directly on the press machine.
  • Deep core cleaning made easier thanks to special plugs.
  • Fast and guaranteed maintenance time.
  • Easier and safer handling thanks to its weight, which is 40% lighter compared to traditional CRBs.
Money Saving


  • It can be used on presses with no need for wiring or other modifications.
  • Lower power consumption thanks to less stress on the control units.
  • No risk of electrical failure.
  • Less maintenance of both the block and the control units.
  • Less storage space required thanks to its small footprint.
Greater Production


  • Always homogeneous and constant temperature of the mold plate (differential of only 3° C).
  • Improved cycle time.
  • Repeatability of the molding process, lesser waste.
  • Greater press-machine opening during molding.

Why to choose a cold runner block

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.
Difference between molding with CRB and without CRB
CRB 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-per-piece policy and who are now looking for:

  • Manufacturers 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.


Despite solving several molding problems, traditional CRBs are, however, known to complicate certain aspects of the manufacturing process, which can have adverse impact on timing, costs and safety for your company:

  • Start-up times are considerably dilated.
  • Traditional CRBs are hardly compatible with two different presses.
  • Several control units are required for operation, with consequent higher risk of breakdowns, slowdowns and machine downtime due to the higher stress the units are subjected to.
  • Unpredictable maintenance time and costs: repairing operations may require weeks, weighing down your production time considerably.
  • Traditional CRBs are heavy, e.g., a traditional CRB of 670 × 670mm weighs about 700-900kg, making handling complex and dangerous.
  • Manufacturing and supplying a traditional CRB take months from the date of order.
How can you enhance your production process without traditional CRBs giving you headaches?


C3 is a new type of cold-runner injection system, conceived and designed to solve the same problems as traditional CRBs, yet able to improve molding performance by eliminating all the above-mentioned criticalities.

C3 Injection System

What makes a C3 stand out

C3 is one of a kind, and its features has revolutionized the world of cold runner blocks.

Modular structure and removable core

  • Compound change on the press in around 20 minutes.
  • Quickly interchangeable cold runner core: it is possible to have a single shell with multiple cores (e.g., one for each compound) which can be stored until next use.
  • The compound stored inside the core for future use does not vulcanize.
Compound change on the press in 20 minutes
No heating plate needed, as C3 exploits the press plate

No heating plate needed, as C3 exploits the press plate

  • No wiring or expensive modifications to the press machines are required.
  • Money saving.
  • It can be used on all presses installed in the production facility, compatibly with dimensions and fixings.

The plate in contact with the mold keeps a homogeneous temperature

  • In each point of the mold where temperature is measured, the MAXIMUM thermal differential recorded is 3°C only.
  • Optimal vulcanization and utmost quality of the production process.
  • Less swarf, fewer non-conformities and less compound waste.
Cold runner with smaller thermal differential
Parallel nozzle cooling

Parallel nozzle cooling

  • All injection nozzles are kept at the same temperature.
  • Temperature is kept homogeneous throughout the compound while injecting.
  • The compound does not burn.

Optimized thermoregulation

  • Just where the compound flows.
  • Half the control units needed with traditional CRBs are required for operation.
  • Less stressed control units and reduced risk of breakdowns.
  • Lower power consumption.
Optimized thermoregulation with Cold Runner C3
Quick and easy handling of Cold Runner C3

40% lighter than traditional CRBs

  • Quick and easy handling.
  • Quick compound change.
  • Greater safety of staff.

Only 166mm in thickness

  • The temperature transmitted to the mold is kept homogeneous and constant throughout the process.
  • Less storage space.
  • Quick and easy handling.
  • Greater opening of the press for greater freedom of action while molding.
Size of Cold Runner C3
Quick and easy cleaning of Cold Runner C3

Cleaning plugs

  • Quick and easy cleaning.
  • No continuous purging.
  • No need to act on 60-80 screws as in traditional cold runner blocks.


The chart below shows a comparison between C3 injection system, traditional CRBs and molding without CRB.

Without CRB C3 Traditional CRBs
The compound is kept at pre-vulcanization state
Multiple injection
Better compound flowing
Thermal differential (difference in temperature measured at different points of the mold) It depends on the heating plate; nonetheless never below 5°C 3°C It depends on the heating plate; nonetheless never below 5°C
Risk of electrical failure of dedicated heating plate Impossible Impossible Possible
Maintenance time and costs N.A. Transparent Not definable
Delivery time N.A. 8 weeks from date of order(1) Months
Press opening N.A. Optimal Reduced
Compound-change and cleaning time N.A. Around 20 minutes directly on the press By means of continuous purging or else by opening the block (which requires acting on 60-80 screws and takes around 4 hours)
Compatibility with all kinds of injection presses N.A. No modification or wiring required It requires modifications and wiring
Suitable for all kinds of existing molds
Reduced dimensions of the runners (Ø and length)
Even cooling N.A.
Homogeneous temperature of the nozzles N.A.
Flow regulator N.A. It depends on the CRB
Thickness N.A. 166mm ≥ 250mm
Weight of a CRB of 670x670mm N.A. 420-540kg 700-900kg

(1) Processing time for the manufacturing of a 4-nozzles C3

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O.C.S. is sole distributor of C3 overseas.
C3 is designed and manufactured by NCN Technology.

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Who we are

NCN Technology, patent holder of C3, is a company specialized in the design and manufacturing of elastomer injection-molding systems for industrial gaskets. Trusted partners to meet your needs and provide you with consultancy and technical support throughout your project.

NCN Technology was founded in 2013 by Guido M. Castoldi and Andrea Naboni who, for over 20 years, have been helping mold makers in the rubber industry automate work cycles and maximize production, while improving quality of finished products.

In 2018, NCN Technology achieved the ISO 9001:2015 Quality Management System Certificate.

NCN Certificates

What we do:

  • Preliminary consultancy to evaluate the item to be molded.
  • Mold design consultancy.
  • Mold designing.
  • Mold manufacturing.
  • Mold supply and possible testing.
  • Item co-design together with the customer.
  • Training and post-sales consultancy on the best practices for using, assembling/disassembling and maintaining the mold.
C3 is a patent by NCN Technology
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