Silicone, Rubber and Elastomer Parts


With our specialist Da/Pro Rubber for the manufacturing of high quality, tight tolerance rubber and plastic components we can offer medical grade materials and processes tailored to our customers' specifications.

  • Class 10,000 clean room for moulding parts requiring special handling
  • Assistance in qualification procedures involving processes and materials
  • Precision moulding for tight tolerance critical components
  • DaPro's chemists are available to custom compound elastomers for multiple applications 
  •  Internal hole configurations with minor diameters as small as .017" x .75" (approximately 0,43 mm x 19 mm) long and internally expanded up to three diameters
  • Many elastomers can be used
  • Shore hardness range from 30 A to 90 A
  • Secondary flash removal
  • Used in connectors for the Medical, Aerospace, Electronics, and many other industries
  • custom compounds designed to your one-way sealing devices, such as duckbill valves, umbrella valves, flapper valves, etc. 
  • assistance in design and material selection to reduce time from concept to finished product
  • Mould diaphragms with a uniform convolute thickness as thin as 0.004 inches (0.10 mm) held to +/- 0.0015 inches (0.04 mm)
  • Moulded diaphragms have superior sensitivity, repeatability and flexibility in low-pressure instrument and control applications
  • Diaphragms may be designed to have either integral molded points to attach plastic or metal stiffeners
  • Da/Pro can mould or bond metal or plastic retainer plates for one-piece assembly
  • Our custom inspection and quality control group can perform many tests necessary to assure trouble free assembly in your operations
  • Consistent, excellent quality custom seals and gaskets
  • Produced with precise tolerances and damage to sealing surfaces is eliminated because secondary deflashing operations are not required
  • Custom compounding can be developed that fits your products operating environment whether it is chemical, heat or mechanical resistance
  • Our engineering staff can help with design of tooling to reduce the cost of most seals and gaskets
  • Custom O-rings in a variety of sizes
  • Solutions for your O-ring applications, with custom compounds that will work for your specific applications
  • O-rings as small as 0.051 inches O.D. (1,30 mm) to as large as 20 inches O.D. (508 mm)
  • Damage to the O-ring’s surface is eliminated because secondary flash removal operations are not required
  • Engineering and commodity plastic injection moulding
  • High temp plastic moulding
  • TPE overmoulding
  • Insert moulding
  • Custom parts moulded to your specification
  • Sub-Assembly
  • Rapid Prototyping using FDM – Fused Deposition Modelling

Capabilities

Compression Moulding
Da/Pro Rubber, Inc. offers compression moulding of rubber compounds. Compression moulding consists of a top and bottom plate mould that is machined to a custom configuration. An elastomer preform is added between the plates and the plates are compressed under heat and pressure for a specific amount of time. The Da/Pro process monitors variables closely and adjusts to compensate for variable differences during each cycle. After the elastomer is cured properly, the mould is opened, the part is removed; the mould cleaned and the cycle repeated.

Transfer Moulding
Da/Pro Rubber, Inc. offers transfer moulding of rubber compounds. Transfer moulding consists of a mould cavity similar to a compression mould. In addition, the mould contains a transfer pot and a ram, where the rubber material is placed before compression. The mould cavity contains transfer holes, which connect to the transfer pot through sprues. During moulding, the ram is compressed and compounded rubber material flows through the sprues into the mould cavity configuration. Similar to compression moulding, the Da/Pro process monitors all variables and compensates for differences during each cycle. After the elastomer is cured properly, the mould cavity is opened, the part is removed, the sprue is removed, the transfer pot and mould cavity is cleaned, and the cycle is repeated.

Liquid Injection Moulding
Da/Pro Rubber, Inc. offers liquid silicone rubber (LSR) injection moulding. This type of moulding is also called liquid injection moulding (LIM). LIM is similar to transfer moulding, but the rubber material is supplied on a continuous basis through an injection nozzle. The liquid rubber is mixed in line with the cutting agents and is injected into the mould cavity. Under heat and pressure, the rubber cures. The part is then ejected from the cavity and the moulding. The tooling for this process is more precision than compression due to the low viscosity of the liquid silicone.

Injection Moulding
Da/Pro Rubber offers plastic injection moulding services. This is a manufacturing process used for making components from thermoplastic and TPE materials. The plastic material is injected at high pressure into a mould made from the inverse of the desired shape. Unlike thermoset materials such as silicone, the plastic bonds are formed as the material cools. Once the part is cooled, a mould release removes the parts.

Over Moulding / Insert Moulding
Consistent rubber bonded to metal insert and rubber-to-plastic parts are easily produced using the Da/Pro Process for overmoulding. Unitized conductive elastomer / substrate products are moulded to meet stringent customer design requirements and quality demands. The elastomers are attached to the insert substrate by mechanical and/or chemical bonds. In chemical bonding, the elastomer is vulcanized and rubber bonded directly to the metal insert or plastic substrate during the moulding process.

Materials

Amongst others: Butyl, EPDM, Poly Isoprene, Silicone, Fluorosilicone, Viton, Neoprene and NBR