TRANSFER MOLDING
COMPRESSION MOLDING
The most cost-effective and widely-used rubber molding method is compression molding. It is best used for low to medium production volumes for larger parts where tightest tolerances and flawless finishes are not required. This process involves compressing pre-heated material into a mold using a press, completely filling the mold cavity and holding it until cured.
Benefits of Compression Molding
Produces more intricate products
Fewer knit lines
Low tooling costs
Rapid production
Handles high durometer materials
Best Used For
Low to medium volumes
Bulky products
Large range of materials
Larger products
Gaskets, seals and o-rings
Hytech Products offers the most versatile and effective way to remove flash from rubber products by means of Cryogenic Deflashing. Flash is typically found in areas where the mold comes together. This is when excess liquid mold material escapes from the cavity during production. In this process rubber parts are placed inside a barrel and liquid nitrogen is used to chill the parts so that the flash becomes brittle. The temperature of the flashing on the rubber is reduced to below its glass transition temperature, a point at which rubber behaves like glass and becomes easy to remove but does not crack the part. Once chilled, the machine tumbles the parts around on themselves allowing all the flash to break off. Cryogenic deflashing does not degrade the parts or harm their finish in any way. Edges stay sharp and recessed areas are completely cleaned of flash.
CUSTOM MOLD DESIGN
Polyacrylate Rubber
AEM Ethylene-acrylate Rubber
AU Polyester Urethane
BIIR Bromo Isobutylene Isoprene Bromobutyl
BR Polybutadiene Buna CB
CIIR Chloro Isobutylene Isoprene Chlorobutyl, Butyl
CR Polychloroprene Chloroprene, Neoprene
CSM Chlorosulphonated Polyethylene Hypalon
ECO Epichlorohydrin ECO, Epichlorohydrin, Epichlore, Epichloridrine, Herclor, Hydrin
EP Ethylene Propylene
EPDM Ethylene Propylene Diene Monomer EPDM, Nordel
EU Polyether Urethane
FFKM Perfluorocarbon Rubber Kalrez, Chemraz
FKM Fluoronated Hydrocarbon Viton, Fluorel
FMQ Fluoro Silicone FMQ, Silicone Rubber
FPM Fluorocarbon Rubber
HNBR Hydrogenated Nitrile Butadiene HNBR
IR Polyisoprene (Synthetic) Natural Rubber
IIR Isobutylene Isoprene Butyl Butyl
NBR Acrylonitrile Butadiene NBR, Nitrile, Perbunan, Buna-N
PU Polyurethane PU, Polyurethane
SBR Styrene Butadiene SBR, Buna-S, GRS, Buna VSL, Buna SE
SEBS Styrene Ethylene Butylene Styrene Copolymer SEBS Rubber
SI Polysiloxane Silicone Rubber
VMQ Vinyl Methyl Silicone Silicone Rubber
XNBR Acrylonitrile Butadiene Carboxy Monomer XNBR, Carboxylated Nitrile
XSBR Styrene Butadiene Carboxy Monomer
YBPO Thermoplastic Polyether-ester
YSBR Styrene Butadiene Block Copolymer
YXSBR Styrene Butadiene Carboxy Block Copolymer
MATERIALS
Ethylene-Propylene (EPDM, EP, EPT)
Chloroprene, Neoprene® (CR)
Nitrile, Buna-N (NBR)
Silicone (VMQ)
Viton®, Fluorocarbon (FKM)
Natural Rubber (NR)
Styrene-Butadiene (SBR)
Polyurethane (AU, EU)
Fluorosilicone (FVMQ, FMQ)
Butyl (IIR)
Hypalon® (CSM)
Hydrogenated Nitrile (HNBR)
Polyacrylate Acrylic (ACM)
Ethylene Acrylic Elastomer, Vamac® (AEM)
Epichlorohydrin (ECO)
FDA Approved (Food Grade)
Color Compounds
Gum Silicone
Liquid Silicone
Fluorocarbon
Fluorosilicone
Organic Rubbers
Neoprene
Fluoroelastomer
A2LA Materials Listing
Finishes Lubrication
Teflon Coating
Hytech Products offers a range of mold services such as Prototype Molds, Compression Molds, Insert Molds, Transfer Molds, and Over Molds. Our experienced team of designers and engineers offer our clients cutting-edge designs and optimal waste reduction, delivering the best possible yields at the lowest possible cost. Precision is key for our customers and we deliver the best in custom mold and tooling solutions across many industries.
For a comprehensive list of available materials, processes and services CONTACT US HERE
RUBBER TO METAL BONDING
PRODUCTION INFORMATION
CRYOGENIC DEFLASHING
Like compression molding, transfer molding also utilizes a press and mold. The main difference is that in transfer molding, a piston forces the material through a passage into the mold cavity. While transfer molding can be more costly and take more time than compression molding, this method produces more complex products with a tighter tolerance control while still maintaining a higher production rate.
Benefits of Transfer Molding
Handles larger products
Maximum cavity pressure for more detailed designs
Faster mold setup
Higher production rate
Lower production costs
Best Used For
Low to medium volumes
All rubber durometers
Thicker walls
Better surface finish
Tight dimensions and tolerances
The process used to bond rubber to metal depends upon the application, specifically the use of the finished product. rubber to metal bonding is an ideal process for bonding metal and plastic parts including: gears, shafts and rollers in a wide array of sizes and shapes. Additional uses for this process include rubber components bonded to steel, aluminum, brass and plastic.