PRECISION MOLDINGS

Manville Rubber Products is properly equipped to take full advantage of all three major production methods used in producing precision molded goods. Each offers unique benefits when properly matched to the product to be produced.

We operate only the most advanced, closed loop, PLC controlled rubber injection molding machines available making MRP's rubber injection molding the fastest, most accurate, most repeatable method for rubber goods production.


INJECTION MOLDING

We operate only the most advanced, closed loop, PLC controlled machines available making this production method the fastest, most accurate, most repeatable method for rubber goods production. These advanced molding machines allow such specialized cycles as injection/transfer, injection/compression, preform, vacuum purge and volumetric bump cycles. Use of these specialized cycles can open a narrow processing window and turn a tough production problem into a zero defect winner.

Best suited for:

  • Close dimensional tolerances
  • High volume production
  • Small to medium sized parts
  • Low to medium-high durometer materials
  • Insert molding

Advantages over other methods:

  • Shorter production cycles mean lower unit cost
  • Ability to maintain closest dimensional tolerances
  • Computer control allows the best repeatability from cycle to cycle and production run to production run
  • Specialized cycle availability provides solutions to tricky production problems

TRANSFER MOLDING

In concept, transfer molding is a simplified version of injection molding. It is ideal for intricate parts with lower volume requirements. Though cycle times are generally longer than those found in injection molding, lower hourly machine cost, quick setups and less scrap keep unit costs competitive.

Best suited for:

  • Mid range dimensional tolerances
  • Low to medium volume production
  • Small to medium sized parts
  • Low to medium-high durometer materials
  • Insert molding

Advantages over other methods:

  • Shorter production cycles than compression molding
  • Ability to maintain closer dimensional tolerances than compression molding
  • Excellent uniformity from mold cavity to mold cavity
  • Rapid mold setups
  • Couples some of the advantages of injection molding with the simplicity of compression molding

COMPRESSION MOLDING

The original production method for molded rubber products upon which all other production methods are based. Ideal for low to medium volumes and large parts. Still a very efficient, low waste, widely used production method suited to a large variety of products.

Best suited for:

  • All but the closest dimensional tolerances
  • Low to medium production volumes
  • Medium to large sized parts
  • Low to high durometer materials including very high hardness
  • High cost materials

Advantages over other methods:

  • Lowest tooling investment
  • Shortest mold setup times make a perfect match for short production runs
  • Ability to process very stiff, high durometer materials
  • Generates less waste than other production methods

INSERT MOLDING

Insert molding is the process whereby metallic or other high temperature resistant materials are overmolded or encapsulated with bonded rubber. Typical insert molded items are used in sealing (valve stems and poppets, sealing plates), in damping (vibration mounts) and in general product reinforcement (strengthening a bolt hole location with a bonded in place washer). By using specialized primers we can vulcanize any rubber material directly onto virtually any substrate (provided the substrate can withstand molding pressure and temperature) and produce a permanent bond that is stronger than the rubber material itself.

  • Normally utilizes transfer or injection molding, though compression molding can be suitable for large inserts
  • Substrate must withstand high pressures and temperatures of at least 285F for 20min.
  • Vulcanized bonds are superior in strength to secondary "glued" adhesion and will withstand the same chemical and temperature exposure as the rubber material
TOOLING

Outstanding tooling design and fabrication are critical to the success of your new project. Manville's experienced staff have the skill and passion for detail that insures your tooling investment is designed and produced to the highest standards of accuracy, quality, and durability. More >

MATERIALS

Our materials lab operates to serve both development and quality assurance needs. With a vast rubber compound database encompassing thousands of formulations in all material types, Manville Rubber Products is certain to have the perfect material for your project. More >

PRODUCTS

Manville Rubber Products has vast experience in the production of an astounding variety of molded rubber products. From one-of-a-kind development projects through high volume contract production MRP is properly equipped to efficiently manufacture to your exact specs. More >

Tel: (908) 526-9111   |   Fax: (908) 526-7123   |   info@manvillerubber.com