Compression Molding

Compression Molding

Get your low to mid-volume rubber products in as fast as 10 days.

From mold design, mold manufacturing, to the production of your rubber part. The whole process is done in-house, saving you money and time. Our facility is home to a multitude of different presses with varying tonnage. KC Seals can manufacture rubber products in diameters ranging all the way from 1/2 an inch to 16 inches, with a maximum height of 10 inches.


COMMON PRODUCTS

CAPABILITIES

SIZE LIMITATIONS

Although there is a wide range of part complexities we can manufacture, with our 150-350 ton vacuum presses, we have the ability to manufacture rubber products with outer diameters up to 16 inches, whereas, on the smaller scale, the parts can be as small as half an inch. Part height-wise, the product could be as long as 10 inches.

TOLERANCES

The table below shows the RMA “A2” tolerance standards which are commonly used in the Oil and Gas industry. The main reason why there is a need to use a tolerance range standard for a finished rubber product is simply the fact that all cured elastomers shrink differently while it is cooling off after the demolding process. Besides, the same material can shrink differently if the following process parameters are altered: Mold design (Transfer vs Compression molding), mold cavity pressure, different raw material batches, wall thickness of the product, etc.

MOLD MANUFACTURING

Setup fees are a major deterrent when looking to source your rubber products. That’s why we moved the whole mold manufacture process inside. Our fully equipped machine shop means significant cost savings for you, consistent quality, and guaranteed lead times. As well as the security that your IP will stay under one roof and not be shipped off to a machine shop you don’t know.

RUBBER TO METAL BONDING

With our abrasive media blasting chamber, custom made painting table and the experience of working with multiple different bonding agents. K.C. Seals is equipped to handle all your rubber to metal bonded products.

AVAILABLE MATERIALS

Material CodeDescriptionTemperature RangeTensile StrengthElongation100% ModulusManufacturing serviceData Sheet
F7SDIs a standard grade FKM 70 durometer-15°C (5°F) to +204°C (+400°F)1982 psi240%721 psi
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F8SDIs a standard grade FKM 80 durometer-15°C (5°F) to +204°C (+400°F)2098 psi190%958 psi
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F9SDIs a standard grade FKM 90 Durometer-15°C (5°F) to +204°C (+400°F)2197 psi152%1347 psi
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FCR75EFCR75E is a highly fluorinated Viton™
material that offers more chemical
resistance than your standard FKM materials.
-15°C (5°F) to +204°C (+400°F)3200 psi300%840 psi
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FE75EViton™ Extreme™ ETP combines the excellent thermal resistance of Viton™ fluoroelastomers with unique resistance to chemicals and environments that have historically exceeded the capabilities of conventional fluoroelastomers.-15°C (5°F) to +225°C (+437°F)2828 psi257%1013 psi
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FLT75EFLT75E is a low-temperature Viton™ material.
Exhibiting all the same characteristics of a standard FKM
– 30°C (-22°F) to +204°C (+400°F)2200 psi220%900 psi
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Material CodeDescriptionTemperature RangeTensile StrengthElongation100% ModulusManufacturing ServiceData Sheet
H6DSH6DS is a standard grade 60 durometer hydrogenated nitrile compound.– 30°C (-22°F) to 150°C (+302°F)3220 psi399%577 psi
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H7DSH7DS is a standard grade 70 durometer hydrogenated nitrile compound.– 30°C (-22°F) to 150°C (+302°F)3360 psi290%1521 psi
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H8DSH8DS is a standard grade 80 durometer
hydrogenated nitrile compound.
– 30°C (-22°F) to 150°C (+302°F)3420 psi198%2022 psi
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H9DSH9DS is a standard grade 90 durometer hydrogenated nitrile compound.– 30°C (-22°F) to 150°C (+302°F)3890 psi140%3138 psi
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H8DUH8DU has superior resistance to compression set far better resistance to abrasion and performs very well in petroleum applications where standard HNBR materials may not hold up.– 40°C (-22°F) to 160°C (320°F)4135 psi178%2370 psi
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Material CodeDescriptionTemperature RangeTensile StrengthElongation100% ModulusManufacturing ServiceData Sheet
N7DSN7DS is a standard grade 70 durometer nitrile compound– 40°C (-40°F) to 110°C (230°F)2430 psi404%590 psi
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N8DSN8DS is a standard grade 80 durometer nitrile compound– 40°C (-40°F) to 110°C (230°F)2790 psi310%1120 psi
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N9DSN9DS is a standard grade 90 durometer nitrile compound– 40°C (-40°F) to 110°C (230°F)3390 psi190%1685 psi
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NLACN7DSWith low ACN and high plasticizer content this compound offers low-temperature flexibility down to -50°C– 50°C (-60°F) to 93°C (200°F)1860 psi270%395 psi
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NHACN7DSA 70 duro high ACN content has excellent resistance to petroleum oils automatic transmission fluid and crude oil– 25°C (-15°F) to 120°C (250°F)1940 psi340%410 psi
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Material CodeDescriptionTemperature RangeTensile StrengthElongation100% ModulusManufacturing ServiceData Sheet
A75EA75E is a 75 durometer AFLAS® compound– 5°C (25°F) to +230°C (+446°F)1550 psi355%750 psi
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A95EA95E is a 95 durometer AFLAS® compound– 5°C (25°F) to +230°C (+446°F)3550 psi135%2870 psi
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Material CodeDescriptionTemperature RangeTensile StrengthElongation100% ModulusManufacturing ServiceData Sheet
E9DSE9DS rubber (ethylene propylene diene monomer rubber) is a 90 durometer peroxide cured EPDM material characterized by its wide range of applications and good chemical resistance.– 54°C (- 65°F) to 150°C (300°F)2400 psi300%1200 psi
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Not sure about what to consider when designing a product for compression molding?  Download our design guide for free.