Custom Rubber Gasket with High Temperature Resistance Flat Rubber Gasket
Production Process
Manufacturers produce O-rings using one of two processes: injection molding or compression molding. Of the two, injection molding is most popular. This is because, using injection molding, O-ring manufacturers can fabricate high volumes of O-ring products in a relatively short amount of time. Compression molding, on the other hand, is time consuming and can only really be used with low volume requests.
Materials
O-rings may be made with any of a broad range of natural and synthetic elastomers. The choice of which depends on the properties a manufacturer seeks and a material's reaction to that which it seals, such as: sealing pressure, chemical compatibility, temperature and lubrication requirements.
Popular O-ring materials include: rubber materials, silicone, neoprene, nitrile, EPDM, perfluoroelastomer, fluorosilicone, etc. Other options include polyamides, indium, melt processible rubber, Sani flour, clear plastic and various metals.
Since aerospace applications like brake systems and engine turbines require extremely strong and resilient O-rings, theirs are usually made from materials like EPDM, perfluoroelastomer and fluorosilicone. Petro-chemical hydraulic applications, which include oil refining, water treatment and chemical processing, use FKM, nitrile, perfluoroelastomer,the like because they are highly resistant to fuels and chemicals.
| Technical Specification |
|
| Material |
NBR, NR, EPDM, FVMQ,HNBR,LSR,CR,Silicon, PU,SBR,IIR |
| Size/Color |
Customized |
| Hardness |
20-90 Shore A |
| Processing Way |
Compression, injection, injection transfer, extrusion, silicone liquid injection |
| Certificates |
SGS, RoHS. Reach |
| Packing |
PE plastic bags then to the carton / as customized |
| Payment |
T/T, Paypal, Western Union,Payoneer |
| MOQ |
5000 PCS |
| Shipping Method |
SEA,AIR,DHL,UPS,FEDEX,TNT, etc. |
| Delivery Time |
7 days for prototype tooling & samples, 14 days for production mold, 14-28 days for MOQ |
| Full Name of Material |
Nitrile Rubber (Buna-N/NBR)
Natural Rubber(NR)
Ethylene-propylene (EPR, EPDM)
Fluorocarbon (FKM/FPM)
Fluorosilicone(FVMQ)
Hydrogenated Nitrile (HNBR)
Liquid Silicone Rubber(LSR)
Neoprene Rubber(CR)
Silicone Rubber
Polyurethane(PU)
Styrene-butadiene Rubber (SBR)
Butyl Rubber(IIR) |
Design and Customization Considerations
During design and customization, manufacturers must map out specifics like: material, material durability, material hardness, cross-section diameter, inner diameter, O-ring seal capacity, O-ring shape and O-ring size. They make these choices based on application specifications like: required sealing pressure, required chemical compatibility, required temperature resistance and lubrication requirements. Depending on where the O-ring will be used, they also choose between metric and nonmetric measurements. While round or donut-shaped O-rings are most common, manufacturers can also fabricate O-rings with custom profiles, including flat, square, rectangle or irregular.
At their cross-section, most O-rings are disc-shape. Users place the O-ring within a groove between two joints, where, when pressured, its disc-shaped cross-section is compressed and deforms. When this happens, the O-ring creates a seal. The more pressure is applied inside or outside the O-ring, the stronger the seal becomes. The sealing capabilities of an O-ring, however, are not based on how well it deforms. Rather, they are based on its resilience, which is measured by its ability to hold its original shape after deformation.
| Mold |
Molding Process |
Injection molding, mold processing |
| Mould type |
Precision Injection Mold, compression molds |
| Machines |
350T vacuum pressing machine and other pressing machine at 300T,250T and so on |
| Tooling equipment |
Rubber tension tester, Rubber vulcanization instrument, Durometer, calipers, ageing oven |
| Cavity |
1~400 cavities |
| Mould Life |
300,000~1,000,000 times |
| |
| Production |
Production capacity |
finish each mold of product in 3 minutes and working on 3 shifts within 24 hours |
| Mold lead time |
15~35 days |
| Sample lead time |
3~5 days |
| Production time |
usually 15~30 days, should be confirmed before order |
| Loading port |
zhong shan |
For example: Custom Sealing Gasket Types
Silicone O-Ring Gasket
Silicone lends its support to applications that require a material high in resistance to fast, wide temperature swings, extreme dry heat and UV weathering. Typically, they're used in the heating and medical industries. However, because silicone is so expensive, silicone O-rings are also sometimes used around earplugs and as necklace strings.
EPDM O-Ring
O-ring EPDM types are extremely resistant to alcohol,polar solvents like MEK. However, they do have poor resistance to petroleum oils and greases. Most often, they are used with solvents.
Neoprene O-Ring G
Heat exchangers and chiller systems rely on neoprene O-rings to seal refrigerants,inside.
FKM O-Ring
FKM O-rings are useful in processes similar to other rubber O-rings, such as oil refining and chemical processing, because they are chemical resistant and have an extremely high process temperature limit.
Nitrile O-Ring
Of all the standard O-ring products, nitrile O-rings are the most popular. They are regarded for their oil and fuel resistance.
Clear O-Ring
Clear plastic O-rings are used routinely in hospitals and medical care centers, for IVs and other clear tubing. They are also common in food and beverage processing. Typically made from polyurethane or silicone, they can be ultra-clear or semi-clear, depending on your needs.
Metal O-Ring
Rubber O-rings are not universally temperature resistant without additives, which is why manufacturers sometimes also use metal O-rings or metal alloyed O-rings. Metal O-rings are generally stronger and more resistant to other stresses as well, like corrosion. They are used with applications that have a wider range process range, temperature range and/or corrosion range.
Metric O-Ring
Metric O-rings are O-rings with measurements specified using the metric system. Most O-rings outside of the US, including global O-rings, use metric O-ring measurements.
O-Ring Cord
O-ring cord is an O-ring product sold by the foot. With it, you can slice the material yourself, creating any O-ring size for a quick seal whenever you need it. They work best with large diameter, static applications.
As a company specialized in manufacturing and manufacturing rubber and silicone products, Melon has been in
production for more than ten years.Production experience, ISO certified workshop and professional technical team.
We are committed to the production of rubber products, silicone products, according to different conditions, choose
different materials to adapt to it. So you can tell us your needs, we can customize a suitable product for you according
FAQ:
Q:Are you a trader or a manufacturer?
A:We are a trading and manufacturing company with specialized manufacturing factories and trading departments.
Q: How can I get some samples?
A:Please contact us. We are honored to offer you free samples. It will cost some sample charge for custom
designs,but it is refundable when order is up to certain quantity.
Q: What is your terms of payment?
A: 7 days for prototype tooling & samples, 14 days for production mold, 14-28 days for MOQ.
Q: Why choose us?
A: We have professional team with rich experiences and high precision equipment which can guarantee the
product quality, through our scientific management and strict cost control we can offer you the best competitive !
Welcome to inquire, let's get started!
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