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Hydraulic Seals

Based off of a process intended for the molding of plastics, injection molding of rubber began in the mid 1960s. Rubber injection molding successfully alters the plastics process by heating the rubber and placing it under significantly more pressure per square inch of cavity surface in molding. This is different from the plastic injection molding process where the materials are cooled under less pressure. Through various innovations, injection molding has become one of the most efficient ways to create molded rubber products in many cases.

Hydro Tester Seals

The process of injection and injection-transfer molding starts with efficient material preparation. To begin, the material is mixed in bulk and then stripped immediately into continuous approx. 1.25" wide & .375" strips. These strips are then fed into a screw which, in turn, fills a barrel with the appropriate predetermined amount of rubber material

Idler Rollers

Advantages of injection molding:

The complete elimination of pre-forms- The production and need for pre-forms is a labor intensive step that can potentially affect the finished product through variability in pre-form weight and shape.

Elimination of operator placement of pre-forms- Since pre-forms are eliminated, the need for operators to place the pre-forms in a cavity (compression molding) or pot (transfer molding) is removed.

Industrial Rubber Parts

Injection screw pre-heats material before forcing it into cavities

This process decreases the viscosity of the material, allowing it to flow more easily into the cavities.

This pre-heating provides the potential for decreased cure times through.

1. More rapid cavity filling due to lower viscosity
2. Material already being in the curing process through the heat added during screw charging and shear created during injection

Marine Rubber Products

Reduced cycle time, Flashless tooling, Economical process for high volumes of medium to high precision components, Capable of producing overmolded components, Minimal material waste

Medical Rubber Products

Compression Molding

Compression molding is a process that involves taking a rubber compound or mixed raw material and creating "pre-forms" in the basic shape of the end product. The pre-forms provide a surplus of material to be placed in the cavity, thus ensuring a total cavity fill. Once in place, the mold is then closed, applying both heat and pressure to the pre-form and allowing it to fill the cavity. When the cavity is filled, excess pre-form material spills out into overflow grooves. Following this step the rubber is then demolded, usually by hand, leaving us with the molded rubber product.

Moulded Rubber Products

Compression molding is often chosen for medium hardness compounds in low volume production or in applications requiring particularly expensive materials. This process helps to minimize the amount of overflow, or flash created during the rubber molding process.

Neoprene Elastomeric Bearing Pad

In creating compression molded rubber products, the pre-forms can be difficult to insert into more complex mold designs. Furthermore, the compression molding process does not lend itself well to the material flow requirement of harder rubber compounds.

Neoprene Fabric Reinforced Diaphragms

Benefits of Compression Molding

1. Cost effective tooling
2. Maximized cavity count
3. Economical process for medium precision

Neoprene Rubber Flange Gasket

Compression molding can be a cost effective solution in situations where:

1. The tooling already exists
2. The cross-section of the part is very large and requires a long cure time

Nitrile Stripper Rings

Applications of compression molding range from simple o-ring drive belts to complex brake diaphragms with diameters of more than 10 inches. Timco can also offer a variety of other molded rubber products through compression molding.

O Ring Seals

Transfer Molding

As with compression molding, transfer molding requires secondary raw material preparation into pre-forms. It differs, however, in the placement of these pre-forms into a "pot" located between the top plate and a plunger. When the pre-forms are placed into the pot, the mold is then closed and the material is compressed by the plunger and transferred through sprues into the cavity below.

O Rings

Some possible advantages of transfer molding over compression molding can include:

1. High Cavity Count - In many cases, transfer molded rubber products require fewer and simpler pre-forms. One pre-form can fill hundreds of cavities
2. Cost effective tooling
3. Tighter control of dimensional tolerance - the mold is not held open by excess material spilling out of the cavity parting line; all the excess hold the plunger open from the pot.

Oil Seal

Economical process for medium to high precision components

Color molded rubber parts benefit - pre-forms can be cut by hand from raw material, thus reducing the chance of contamination that can result from the mechanical prep of compression molding or the injection screw and barrel in injection molding.
Capable of producing overmolded components

Packing Grommet

The primary disadvantage of transfer molding is found in the increase of waste or excess flash. This can be seen in the "flash pad" or the rubber left in the pot after the transfer is cured which can either be recycled or discarded.

Packing Rubber

Deflashing

Removal of the waste edge, or flash, from a molded rubber productcan be accomplished in a number of ways. Depending on the material, part size, tolerance and quantity deflashing methods commonly include:

Manual tear trimming
Cryogenic processing
Tumbling
Precision grinding

Perfluoroelastomer O Ring

The custom injection molding of Liquid Silicone Rubber (LSR) uses much of the same process and equipment as injection molding. In both processes, the mold is heated and closed before the uncured rubber is injected. Unlike high consistency rubber (HCR), also known as gum stock, liquid silicone is just that, a “high viscosity liquid” that comes in two parts, Part A and Part B.

Pet Bowl Rubber

Both parts are liquid but one part contains the catalyst which is platinum. Liquid Silicone has the consistency of cold molasses, is naturally translucent and comes in either pail kits (approx. 80 lbs.) or drum kits (approx. 800 lbs.) The two parts are mixed and delivered to the barrel of the injection press via a mixing/metering pumping system. If desired, Pigment may be added via a pumping system to color the Liquid Silicone. The mixed Liquid Silicone is then injected into the mold much like gum stock, but the Runner, Gate and Sprue are generally smaller due to its lower Viscosity. Once in the mold, the Liquid Silicone cures at a much faster rate than typical high consistency Silicone due to its platinum cure system. As a result of this rapid cure cycle, the part price is frequently lower than parts made using conventional molding processes such as Compression, Transfer and Injection Molding.

Pipe End Caps

For applications where contamination is a problem or where high volumes are required, LIM is ideal. The Medical Industry prefers LIM because it is a closed system of molding, meaning, the pail or drum kits of uncured Liquid Siliconeare loaded into the pumping system, injected and cured without human contact. Liquid Injection Silicone Molding is also ideal because of its ability to manufacture Silicone Products at a low cost thus ensuring competitiveness in the Medical Industry.

Pipe Testing Seal

Rubber moulding is the process by which custom rubber mouldings and standard rubber products are created for various applications.

We are expert rubber moulders with quality rubber moulding facilities that can produce a wide variety of medium volume rubber products in the entire range of elastomeric thermoset materials. Rubber injection moulding and rubber compression moulding products are amongst some of the items that we manufacture.

Pipe Varnishing Seal

As a rubber moulding company that manufactures a full range of custom commercial rubber products, we offer expertise in design, rubber moulding material selection, manufacture method and cost-effective solutions. We offer both a volume manufacture service, supplying to a schedule or one-off quantity order, as well as low volume specialist work, requiring standard or custom rubber mouldingseither for prototyping and development or for bespoke project requirements. Using production facilities including injection moulding machines up to 1 litre capacity, and more than 20 transfer and compression moulding machines, we produce items ranging from a fraction of a gram up to 5 kg in weight.

Piston Cup Seal

Rubber Moulding Types and Materials

We mould rubber products in all the common compounds, including:

Neoprene ®
Nitrile
Natural Rubber
Silicone

Piston Seals

In addition to this, we also produce specialist high-performance elastomers such as:

Hydrogenated Nitrile
Viton ®
Aflas ®
Perfluoroelastomer

Pneumatic Seals

As specialist rubber moulders, we also offer a custom compounding service so that we can cover the whole material spectrum. This allows us to provide a complete technical service and solve individual design or application issues with a dedicated custom rubber moulding compound.

Polyurethane Product

Our technical staff is always available to discuss any challenges faced by our customers, and our extensive experience as rubber manufacturers and the range of our facilities mean we are ideally placed to solve most problems.

Pressure Cooker Rubber Ring

Our longstanding history as rubber manufacturers and rubber moulders means that we have an extensive collection of standard mould tools for the cost effective and speedy production of industrial rubber items such as rubber grommets, coupling rubbers, bushes, bellows, rubber O rings and rubber seals. We also specialise in highly technical composite and rubber to metal bondings, custom bespoke parts and the prototyping of pre-production rubber moulding products.

Pressure Cooker Sealing Ring Gasket

We have in-house facilities for substrate preparation prior to bonding processes. Our tooling is designed and manufactured in-house, using industry-leading CAD/CAM packages. In addition to this , all trimming and finishingoperations are carried out on site, to ensure the highest quality levels, supplemented with cryogenic de-flashing and other automated techniques.

PTFE Washers

Volumes and Quick Lead Times

We maintain sufficient capacity and expertise to offer very short lead times where the customer requires exceptional service. Meanwhile, our planning systems ensure we maintain a consistent workflow to deliver a consistent service across our vast range of rubber moulded products and customers.

PU Spacers

Custom Rubber Moulding and Stockholding

To provide a wide variety of solutions, we hold a range of standard and common rubber mouldings including gaskets, seals and grommets. These products are cost effective and we can supply these parts and components rapidly. Our delivery times for rubber moulded products are excellent, providing a fast turnaround for many industries that demand this from our services, including the defence and motorsport industries.

PU Bush

Rubber Mouldings Applications

Historically, we’ve worked with nearly every industry. Wherever your market is across the globe, we can provide you with the right rubber mouldings and services you need.

PU Seals

Some of the clients we have worked with in the past have been from the following sectors:

Defence Industries, Aerospace Industries, Motorsport Industries, Marine Industries, Medical Industries, Telecommunications industries, Steel Industries, Pipe Industries, OEM Supplies

PU V Rollers

One of our most recent clients that we have been working with to provide rubber mouldings for is from the energy sector. In each case, we have been able to provide both standard and custom rubber moulded components for each of their various applications.

PU Wheels

Please follow the links to access more information about our rubber moulding expertise, detailed product listings and more detail on the various processes and techniques available for the production of bespoke and standard rubber mouldings.

Rod Seals

Mould curing - Techniques

Manufacturing methods

The moulding processes can be categorised into three main groups as mentioned earlier:

Compression moulding
Transfer moulding
Injection moulding

Rotary Shaft Seals

The first method mentioned above is the oldest and simplest method. Development has since been moving towards transfer moulding and above all towards injection moulding with the thermoplastic industry being the primary leader in this field.

Rubber Auto Parts

Compression moulding

In compression moulding, the rubber compound is formed into a blank, which is then placed in the mould cavity. In order to ensure that the mould is filled properly, a certain excess charge of between 5 - 10 % is required.

Rubber Blender Coupling

A simple punching or cutting procedure directly from the rubber slabs produces blanks or alternatively the rubber compound is squeezed into shape with the aid of a plunger or screw through an extruder die. The strip obtained is then cut into suitable lengths.

Rubber Buffer

The supply of heat depends on the rate of heat conduction from the mould to the rubber. Since the heat conductivity of rubber is poor, heating is slow and the curing time is therefore relatively long.

Rubber Bumper

Typical curing times are from 3 minutes for thin goods to several hours for products with thick walls. In the latter case, it is more efficient to pre-heat the rubber. This can take place in a hot air oven or in a microwave oven up to temperatures of approximately 100 °C. When heated over 100 °C the risk of scorching becomes excessive.

Rubber Caps

The advantages of compression moulding are primarily the following:

1. The method is simple and only requires relatively simple presses and moulds. It is an appropriate method for short runs.
2. Allows manufacturing of composite products which contain non-rubber reinforcing material (laminates).
3. Suitable for products with large surface or large spreading.
4. Can be used for rubber compounds with high viscosity and poor flow properties.

Rubber Coupling

The disadvantages of compression moulding are the following:

1. The preparation of blanks and the insertion of blanks into the mould are time consuming.
2. Complicated cavities can be difficult to fill out completely.
3. The formation of flash is extensive and the variations of the hot mould cavity dependant dimensions are relatively extensive.
4. The production rate is relatively low.

Rubber Cover

Transfer moulding is a natural progression in the development when attempting to limit the disadvantages of compression moulding. The blank is loaded into a loading chamber and is then distributed into several cavities. The rubber is squeezed out of the loading chamber by means of the closing mechanism of the press itself, or with separate pistons, into each respective cavity.

Rubber Dust Cover

Since the rubber is forced to flow through channels and gates, preheating takes place in the rubber. This preheating significantly reduces the curing time. Provided that the injection pressure does not exceed the closing pressure of the mould, a well balanced dosage of rubber into each cavity will be obtained and the formation of flash will be reduced to a minimum.

Rubber Elastomeric Laminated Bearing Pad

The advantages of transfer moulding are primarily the following:

The preparation of blanks and their handling is made considerably easier.
The preheating of the rubber reduces the curing time.
Since the rubber is preheated it flows easier and fills the mould cavities more efficiently.
The mould is closed when the rubber is injected into the cavities, which means that less flash is formed and smaller dimensional variations of the product are obtained.
For rubber-metal bonding, the rubber makes better contact with the metal in the form of a new and “fresh”, clean surface.

Rubber End Caps For Pipe

The disadvantages of transfer moulding are primarily the following:

The moulds are more complicated and more expensive.
Parts with textile inserts cannot be produced.
The method requires materials that are relatively simple to process.

Rubber Exhaust Hanger

During injection moulding, the press unit and the injection unit are two separate units with separate operating controls. The press unit can have the mould placed horizontally or vertically. The injection unit can have a combined plasticizing and feeding screw or alternatively the screw is only intended for the purpose of plasticizing and the injection itself is carried out using an attached plunger unit. The positioning of the injection device varies between different makes of machines.

Rubber Feet

It is an advantage if the feed opening for the rubber strip is placed at comfortable working height. One extruder unit can sometimes serve several presses by moving in a pre-programmed pattern. By means of a high injection moulding pressure, a short injection time and a considerable amount of preheating of the rubber is obtained. The preheating can achieve the same or higher temperatures than those of the mould and the curing time then becomes extremely short.

Rubber Floor Mats

A special variety of injection moulding is the use of gear pumps as an injection unit. The injection process then becomes slower but the quantity of rubber per shot is almost unlimited.

Rubber Foot Rest

The advantages of injection moulding are primarily the following:

1. The handling of blanks is completely eliminated.
2. The mould is filled in a closed position and the formation of flash can in certain cases be completely avoided.
3. Complex cavities and flow channels can be filled easily.
4. The curing time is very short
5. The process can be easily automated.

Rubber Foot

The disadvantages of injection moulding are the following:

1. The moulds and machines are considerably more expensive.
2. If an injection unit serves several moulds, the material in the common injection unit is limited to one particular type of compound.
3. The process requires greater technical know-how.
4. There are strong requirements for the rubber compound to have low viscosity and to be homogenous.
5.Gates and injection runners contain vulcanised rubber, which must be discarded.
6. Laminated parts cannot be produced.

Rubber Leg

Speedometer Components for two wheeler & four wheelers.
Water-Proofing components.
Gaskets.
Shock Absorber parts.
Extruded Sleeves.
Cushion & Sponge Rubber parts.
Metal to Rubber bonded parts.
Plastic to Rubber bonded parts

Rubber Metal Bonded Parts

Bumpers, Rubber Gaskets, O- Rings, Molded Hoses, Boots & Bellows, Engine Mounts, Rubber Grommets for WSS, Rubber Caps, Extrusion Protection Pipes, Rubber to Metal Bonding

Rubber Mount

Moulded rubber products including Grommets, Bellows, Buffers, Steering Column and other Boots, Wiring Harness components like Bellows, Isolators, Exhaust Hangers, Bumpers and a range of other similar components.

Rubber Mud Guards

The company manufactures broad range of high quality Rubber Components

Our Company manufactures a wide range of Moulded Rubber Products for Automobiles and Industrial Uses. The range would include products like Dust Caps, Bellows, Rubber Housings, Exhaust Hangers, Rubber Bushes, Suspension Kits and the range of other products used in Automobiles. The industrial products would include Rubber Rings for water, gas and oil pipelines.

Rubber Pad For Haul Off Unit

We, as a company working on the guidelines of ISO 9001:2015 try to ensure that we deliver the best quality product with zero tolerances and deviations in the overall quality of the product.

Rubber Pad

The tool development is undertaken in-house and it is made sure that it has no dimensional deviations.

Rubber Parts For Sanitary Wares

All our products would comply with customer's stated physical test properties of the components. The company uses only the best possible raw materials available which are processed in our fully equipped modern plant.

Rubber Seal Gaskets

We take pride in the fact that we are an approved supplier of many steel and pipe producing industries. Our O.E.M. Clients would also approve of our commitment to quality & customer satisfaction.

Rubber Seals

MOULDING RUBBER MATERIALS / ELASTOMER TYPES

Bright works with a vast range of materials. Environmental factors such as extreme temperatures, exposure to oils, fluids and chemicals, combined with physical requirements such as strength, flexibility and impact resistance will all help determine the most appropriate material to use.

Rubber Sheets

Below you will find a list of the most common materials that we use.

Natural Rubber (Polyisoprene)
SBR (Styrene-Butadiene-Rubber)
EPDM(EPDM ETHYLENE PROPYLENE )
butylrubber
Polyurethane (AU, EU)
Neoprene CR (Polychloroprene)
Hydrogenated Nitrile (Hnbr Hsn )

Rubber Spacers

HYPALON Chlorosulphonated Polyethylene ( CSM )
NITRILE ( NBR )
Acrylic ACM (Alkyl Acrylate Copolymer)
VAMAC
SILICONE RUBBER
VITON
Fluorosilicone ( FVMQ)
FLUOROCARBON (FKM )
AFLAS ( Tetrafluoroethylene-Propylene )
Water Council Approved Compounds
Silicone Food Quality Approved

Rubber Spider Coupling

Bright have unrivalled experience supplying over 9,000 customer designed rubber moulded components to date, as well as millions of standard products.

Rubber Stand

Over the last 35 years Bright has accumulated vast experience in the manufacture of specialist rubber mouldings such as hydro testing seals, spacers, varnishing seal, rubber seals, cable connectors, diaphragms, gaitors, O-rings, section rings, rubber to metal bonding and vibration management.

Rubber Stoppers

Injection mouldings specialists in a variety of rubber mouldings.

Bright operate state of the art injection moulding to cater for low volume production to high automated manufacture of rubber mouldings. Advanced tool design allows fast production type moulds to 100% automation for high volume low cost application rubber mouldings. We offer competitive rubber moulding solutions.

Rubber To Metal Bonding

We are highly experienced in rubber moulding with advanced compounds; perfluoroelastomers (e.g FFKM), Viton, low-temp HBNR's and specialist silicones

Bright supplies to ISO 9001, ISO 14001, Food & WRAS Approved, IATF 16649:2016 Quality Standards and specific engineering and medical grades.

Rubber Washers

Our Strengths are:

Compression, injection and transfer moulding
Specialists with advanced compounds for extreme environments; perfluoroelastomers (e.g FFKM), Viton, low-temp HBNR's and specialist silicones.
Low cost entry level tooling to full hardened production tooling
Flame retardant mouldings (UL approved)
Food (FDA) and Water (WRAS) quality approved mouldings
Medical grade rubbers and silicones
Vibration management (rubber to metal and rubber to fabric bonding)
Cryogenic finishing systems
Unique mould monitoring system

Seals And Gasket

Examples of components we manufacture include:

Bespoke mouldings
Bellows
Bumpers
Caps
Cable connectors
Clips
Custom mouldings

Silicone Oil Seal

Diaphragms
End stops
Gaitors
Grommets
Hoses
Inserts
Mountings
Plugs
Protectors
Section rings
Sleeves
Synthetic rubber mouldings

Silicone Roller

EPDM
Viton (registred trade mark)
Silicone
Silicone FDA
Silicone Conductive

Silicone Rubber Stoppers

Silicone Magnetic
Silicone (high temp)
Butyl
Isoprene
SBR

Slitting Line Spacers

Styrene butadiene rubber
Butadiene
Isobutylene
Fluorocarbon
FKM

Suspension Bushes

Aflas
Natural rubber
EPDM
Polycholorprene
Neoprene (registred trade mark)

SWR Pipe Rubber Ring

CR
HNBR
Nylon
EPDM (water council approved)
EPDM (DA approved)

Tie Rod Boots

Nitrile (as approved)
Nitrile (water council approved)
Silicone Fluoro
Glass filled Nylon
PA 6

TMT Bar And Cap

PA66
PA11
PA12
Nylon 6
Nylon 66
Nylon 11
Nylon 12
Polyamide

Trolley Wheel

ASA
Acrylate Styrene Acrylonitrile
Acteal
POM
TPR
TPE
TPU
TPV
TPE

U Seal

Flexible PVC
Polyvinyl chloride
Thermoplastic rubber
Thermoplastic elastomer
EVA
Ethylene Vinyl Acetate

V Ring Seals

Flame retardant elastomer
EPDM/PP
SEBS TPE
SBS TPE
Low density polythene
LDPE

V Seals

Medium density polythene
MDPE
High density polythene
HDPE
Linear low density polythene
LLDPE

Viton Oil Seal

PP-Copolymer
PP-Homopolymer
Polypropylene
Talc filled polypropylene
Mineral filled polypropylene
Polystyrene
ABS

Wiper Seals

Bright Rubber Products is a premier supplier of custom molded products. Our proficiency in rubber molding processes combined with our expertise in formulating optimal rubber compounds makes us the ideal supplier for your molded components. Bright Rubber Products’ services span the gamut from prototype part development through high volume molding capabilities. We offer a complete array of Injection molding, Transfer molding and Compression molding services for our customers.

Wire Harness Grommet

Molded Rubber Components

Bright Rubber Products has developed over 2,000 compound formulations to meet a wide range of specialized needs. Our Chemists and Engineers have the expertise to develop rubber solutions that will optimize your components performance in your applications.

X Ring, Quad Ring

N-house compound formulation development, and full mixing capabilities.
Over 20 engineering polymer families to work from.
Expansive variety of compound characteristics available.

Designing Specifications and Assistance

Aircraft Rubber Wheel Chock

Polymer & Material Selection Guide

Polymer & Material Selection Guide
ACM – Polyacrylate or Acrylic Rubber
BR – Polybutadiene Rubber
CM – Chloropolyethylene Rubber
CR – Polychloroprene Rubber, Neoprene® Rubber

Anti Fatique Mat

CSM – Chlorosulfunated – Polyethylene Rubber, Hypalon® Rubber
EA – Ethylene Acrylic Rubber, Vamac® Rubber
ECO – Epichlorohydrin Rubber, Hydrin® Rubber
EPDM – Ethylene Propylene
FKM – Fluorocarbon, Fluoroelastomer Rubber, Viton®, Fluorel®

Anti Vibration Rubber Mount

FVMQ – Fluorosilicone or Fluorovinylmethylsiloxane Rubber
HNBR – Highly Saturated Nitrile or Hydrogenated Acrylonitrile Butadiene
IIR – Isobutylene Isoprene Rubber, Butyl, Bromobutyl, Chlorobutyl Rubber
NBR – Acrylonitrile Butadiene, Nitrile Rubber, Buna N Rubber
NR – Natural Polyisoprene Rubber, Natural Rubber

Anti Vibration Rubber Pads

SBR – Styrene Butadiene Rubber
SNR/IR – Synthetic Polyisoprene, Synthetic Natural Rubber
URE/AU/EU – Polyester & Polyether Urethane Rubber
VMQ/PMQ/PVMQ – Silicone or Polydimethylsiloxane Rubber
XNBR – Carboxylated Nitrile Rubber

Assorted Ruber Parts

Bellows
Bulbs
Bumpers
Bushings
Check Balls

Automotive Rubber Parts

Connector Seals
Convoluted Boots
Cups
Diaphragms
Gaskets

Bearing Pad

Grommets
Inflatable Seals & Shapes
Isolators
Lip Seals
Mechanical Seals

Bridge Bearing Pad

Molded Gaskets
Protective Boots
Special Plugs
Special Seals & Shapes
Special Seats

Butter Fly Valve Gaskets

Based off of a process intended for the molding of plastics, injection molding of rubber began in the mid 1960s. Rubber injection molding successfully alters the plastics process by heating the rubber and placing it under significantly more pressure per square inch of cavity surface in molding. This is different from the plastic injection molding process where the materials are cooled under less pressure. Through various innovations, injection molding has become one of the most efficient ways to create molded rubber products in many cases.

Butterfly Rubber Stopper

The process of injection and injection-transfer molding starts with efficient material preparation. To begin, the material is mixed in bulk and then stripped immediately into continuous approx. 1.25" wide & .375" strips. These strips are then fed into a screw which, in turn, fills a barrel with the appropriate predetermined amount of rubber material

Caster Wheels

Reduced cycle time, Flashless tooling, Economical process for high volumes of medium to high precision components, Capable of producing overmolded components, Minimal material waste

Cast Polyurethane Rollers

Compression molding is a process that involves taking a rubber compound or mixed raw material and creating "pre-forms" in the basic shape of the end product. The pre-forms provide a surplus of material to be placed in the cavity, thus ensuring a total cavity fill. Once in place, the mold is then closed, applying both heat and pressure to the pre-form and allowing it to fill the cavity. When the cavity is filled, excess pre-form material spills out into overflow grooves. Following this step the rubber is then demolded, usually by hand, leaving us with the molded rubber product.

Chevron Packing Set

Compression molding is often chosen for medium hardness compounds in low volume production or in applications requiring particularly expensive materials. This process helps to minimize the amount of overflow, or flash created during the rubber molding process.

Cooker Silicon Sealing Ring Gasket

In creating compression molded rubber products, the pre-forms can be difficult to insert into more complex mold designs. Furthermore, the compression molding process does not lend itself well to the material flow requirement of harder rubber compounds.

Cow Mat

Applications of compression molding range from simple o-ring drive belts to complex brake diaphragms with diameters of more than 10 inches. Timco can also offer a variety of other molded rubber products through compression molding.

Customised Industrial Rubber Products

As with compression molding, transfer molding requires secondary raw material preparation into pre-forms. It differs, however, in the placement of these pre-forms into a "pot" located between the top plate and a plunger. When the pre-forms are placed into the pot, the mold is then closed and the material is compressed by the plunger and transferred through sprues into the cavity below.

CV Boots

1. High Cavity Count - In many cases, transfer molded rubber products require fewer and simpler pre-forms. One pre-form can fill hundreds of cavities
2. Cost effective tooling
3. Tighter control of dimensional tolerance - the mold is not held open by excess material spilling out of the cavity parting line; all the excess hold the plunger open from the pot.

Defence Machine Rubber Parts

Color molded rubber parts benefit - pre-forms can be cut by hand from raw material, thus reducing the chance of contamination that can result from the mechanical prep of compression molding or the injection screw and barrel in injection molding.
Capable of producing overmolded components

Dog Bowl Gasket

The primary disadvantage of transfer molding is found in the increase of waste or excess flash. This can be seen in the "flash pad" or the rubber left in the pot after the transfer is cured which can either be recycled or discarded.

Double Lip Oil Seal

Removal of the waste edge, or flash, from a molded rubber productcan be accomplished in a number of ways. Depending on the material, part size, tolerance and quantity deflashing methods commonly include:

Electrical Insulation Rubber Mat

The custom injection molding of Liquid Silicone Rubber (LSR) uses much of the same process and equipment as injection molding. In both processes, the mold is heated and closed before the uncured rubber is injected. Unlike high consistency rubber (HCR), also known as gum stock, liquid silicone is just that, a “high viscosity liquid” that comes in two parts, Part A and Part B.

Electronic and Electrical Rubber Parts

Both parts are liquid but one part contains the catalyst which is platinum. Liquid Silicone has the consistency of cold molasses, is naturally translucent and comes in either pail kits (approx. 80 lbs.) or drum kits (approx. 800 lbs.) The two parts are mixed and delivered to the barrel of the injection press via a mixing/metering pumping system. If desired, Pigment may be added via a pumping system to color the Liquid Silicone.

Elastomeric Rubber Ring

The mixed Liquid Silicone is then injected into the mold much like gum stock, but the Runner, Gate and Sprue are generally smaller due to its lower Viscosity. Once in the mold, the Liquid Silicone cures at a much faster rate than typical high consistency Silicone due to its platinum cure system. As a result of this rapid cure cycle, the part price is frequently lower than parts made using conventional molding processes such as Compression, Transfer and Injection Molding.

EPDM Ring Gasket

For applications where contamination is a problem or where high volumes are required, LIM is ideal. The Medical Industry prefers LIM because it is a closed system of molding, meaning, the pail or drum kits of uncured Liquid Siliconeare loaded into the pumping system, injected and cured without human contact. Liquid Injection Silicone Molding is also ideal because of its ability to manufacture Silicone Products at a low cost thus ensuring competitiveness in the Medical Industry.

FFKM Seal

We are expert rubber moulders with quality rubber moulding facilities that can produce a wide variety of medium volume rubber products in the entire range of elastomeric thermoset materials. Rubber injection moulding and rubber compression moulding products are amongst some of the items that we manufacture.

FKM Seal

As a rubber moulding company that manufactures a full range of custom commercial rubber products, we offer expertise in design, rubber moulding material selection, manufacture method and cost-effective solutions. We offer both a volume manufacture service, supplying to a schedule or one-off quantity order, as well as low volume specialist work, requiring standard or custom rubber mouldingseither for prototyping and development or for bespoke project requirements. Using production facilities including injection moulding machines up to 1 litre capacity, and more than 20 transfer and compression moulding machines, we produce items ranging from a fraction of a gram up to 5 kg in weight.

Grommets

As specialist rubber moulders, we also offer a custom compounding service so that we can cover the whole material spectrum. This allows us to provide a complete technical service and solve individual design or application issues with a dedicated custom rubber moulding compound.

Haul off Machine Track Rubber Pad

Our technical staff is always available to discuss any challenges faced by our customers, and our extensive experience as rubber manufacturers and the range of our facilities mean we are ideally placed to solve most problems.

Haul of Rubber Pad2

Our longstanding history as rubber manufacturers and rubber moulders means that we have an extensive collection of standard mould tools for the cost effective and speedy production of industrial rubber items such as rubber grommets, coupling rubbers, bushes, bellows, rubber O rings and rubber seals. We also specialise in highly technical composite and rubber to metal bondings, custom bespoke parts and the prototyping of pre-production rubber moulding products.

PHE Gasket

We have in-house facilities for substrate preparation prior to bonding processes. Our tooling is designed and manufactured in-house, using industry-leading CAD/CAM packages. In addition to this , all trimming and finishingoperations are carried out on site, to ensure the highest quality levels, supplemented with cryogenic de-flashing and other automated techniques.

PHE Mould Making

We maintain sufficient capacity and expertise to offer very short lead times where the customer requires exceptional service. Meanwhile, our planning systems ensure we maintain a consistent workflow to deliver a consistent service across our vast range of rubber moulded products and customers.

PHE Plates And Gasket

To provide a wide variety of solutions, we hold a range of standard and common rubber mouldings including gaskets, seals and grommets. These products are cost effective and we can supply these parts and components rapidly. Our delivery times for rubber moulded products are excellent, providing a fast turnaround for many industries that demand this from our services, including the defence and motorsport industries.

PHE Replacement Gasket

Historically, we’ve worked with nearly every industry. Wherever your market is across the globe, we can provide you with the right rubber mouldings and services you need. Defence Industries, Aerospace Industries, Motorsport Industries, Marine Industries, Medical Industries, Telecommunications industries, Steel Industries, Pipe Industries, OEM Supplies

Plate Heat Exchanger Gasket

One of our most recent clients that we have been working with to provide rubber mouldings for is from the energy sector. In each case, we have been able to provide both standard and custom rubber moulded components for each of their various applications. Please follow the links to access more information about our rubber moulding expertise, detailed product listings and more detail on the various processes and techniques available for the production of bespoke and standard rubber mouldings.

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