Technical rubber and plastic products: molded parts, composite parts, bellows, profiles, seals and hoses to drawing or sample
FRANKSA GmbH
49451 HoldorfNew on Amplifa
About FRANKSA
FRANKSA GmbH, based in Holdorf (Lower Saxony), is a specialized supplier of technical rubber and plastic products. Its product range includes rubber and silicone molded parts made by compression and injection molding (CM, TM, IM), composite parts of rubber or silicone with metal, plastic or fabric, bellows (molded, dipped, convoluted discs, fabric bellows), rubber and plastic profiles including co-extrusion, as well as seals, punched parts and cut-to-size pieces. The company also manufactures hoses, roller coatings, polyurethane cast parts, turned and milled plastic parts and autoclave intermediate layers. A broad spectrum of elastomers (NR, SBR, EPDM, NBR, HNBR, CR, FKM, VMQ, among others) and thermoplastics is processed. Customers come from industries such as mechanical and plant engineering, automotive, medical and food technology, window and façade construction, as well as foundries and steelworks. Standard and standard-compliant parts are delivered from stock, while custom solutions are manufactured individually to drawing or sample.
- Site
- Holdorf
- Processes
- Rubber molded parts by compression and injection molding (CM, TM, IM processes), Silicone molded parts by compression and injection molding (HTV silicone, peroxide or addition, Rubber-metal bonds / vulcanization bonding of metal parts (vulcanization in the compression or, Rubber-plastic bonds / multi-component composite parts (including plasma activation, PTFE etching), Punched parts / seals – steel strip cutting, Solid steel knife cutting, Plotter cutting, Waterjet cutting
- Materials
- Acrylate rubber, Ethylene-acrylate rubber, Epichlorohydrin rubber, Chloroprene rubber, Chlorosulfonylated polyethylene, Ethylene-propylene rubber, Polyurethane rubber, Fluoro rubber
- 01
Material selection and development/consulting
- 02
Vulcanization bonding or extrusion/pressing of semi-finished parts
- 03
Assembly (rings, frames, subassemblies)
- 04
Prototype/sample parts
- 05
Series production
Materials and Processes
Ethylene-propylene rubber
Weather-resistant elastomer for profiles, molded parts and seals in construction, automotive and plant engineering.
Acrylonitrile-butadiene rubber
Oil-resistant nitrile rubber for seals, buffers and machine feet.
Silicone rubber
Temperature-resistant material for molded parts, profiles and dipped parts, also FDA-compliant.
Fluoro rubber
Chemical- and temperature-resistant for seals and stop profiles.
Natural rubber
Standard material for rubber-metal buffers and damping elements.
Polytetrafluoroethylene
Universally chemically resistant for turned bellows and seal cut-outs.
Compression and injection molding
Molded parts by compression, transfer or injection molding depending on quantity, geometry and material.
Profile extrusion with vulcanization
Continuous vulcanization (salt bath, UHF) or discontinuous in an autoclave, including co-extrusion.
Thermoplastic profiles
Profiles and bellows made of TPE, TPU, PVC and other plastics, also as hard/soft combinations.
Locations
Holdorf
DEHeadquarters with manufacturing and sales
- Lot size
- Single part/prototype to large series
- Materials
- Elastomers, silicones, thermoplastics, rubber-metal composites
- Compression and injection molding machines (CM, TM, IM)
- Extrusion lines
- Dipping process
- Cutting machines (steel strip, plotter, waterjet)
- 3D printing
- Assembly/converting
Parts
Inside the production
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Rubber molded parts by compression and injection molding (CM, TM, IM processes)Plastics | – | – | – | Single part/prototype – Large series | NR, SBR, EPDM, IIR, CR, CO/ECO, NBR, HNBR, CSM, EU/AU, AEM, FKM, VMQ, FVMQ |
| Silicone molded parts by compression and injection molding (HTV silicone, peroxide or additionPlastics | – | – | up to 90 Shore A (hardness) | Large series | VMQ, FVMQ |
| Rubber-metal bonds / vulcanization bonding of metal parts (vulcanization in the compression orJoining | – | – | – | Large series | NR, SBR, EPDM, IIR, CR, CO/ECO, NBR, HNBR, CSM, EU/AU, AEM, FKM, VMQ, FVMQ, Steel, Stainless steel, Aluminium, Brass, Copper, Die casting |
| Rubber-plastic bonds / multi-component composite parts (including plasma activation, PTFE etching)Joining | – | – | – | Large series | PA, PEEK, PPA, PPS, PTFE, NR, SBR, EPDM, IIR, CR, CO/ECO, NBR, HNBR, CSM, EU/AU, AEM, FKM, VMQ, FVMQ |
| Punched parts / seals – steel strip cuttingPlastics | normal tolerances | – | – | small quantities – medium quantities | – |
| Solid steel knife cuttingPlastics | high tolerance requirements | – | – | medium quantities – large quantities | Elastomers, Plastics, asbestos-free sealing materials, Cellular materials |
| Plotter cuttingPlastics | normal tolerance requirements | – | – | small quantities | Elastomers, Plastics, asbestos-free sealing materials, Cellular materials |
| Waterjet cuttingPlastics | – | – | – | small quantities | Elastomers, Plastics, asbestos-free sealing materials, Cellular materials |
| Freehand manufacturing (cut-to-size pieces)Plastics | low tolerance requirements | – | – | small quantities | Elastomers, Plastics, asbestos-free sealing materials, Cellular materials |
| Rubber profile extrusion with continuous vulcanization (salt bath, UHF)Plastics | – | per running meter | – | medium quantities – large quantities | NR, SBR, EPDM, IIR, CR, CO/ECO, NBR, HNBR, CSM, EU/AU, AEM, FKM, VMQ, FVMQ, TPE, Silicone |
| Profile extrusion with discontinuous vulcanization (autoclave/steam boiler), assembly intoPlastics | – | – | – | small quantities – bulky geometries | NR, SBR, EPDM, IIR, CR, CO/ECO, NBR, HNBR, CSM, EU/AU, AEM, FKM, VMQ, FVMQ |
| Co-extrusion (hard/soft combinations, multi-component profiles)Plastics | – | – | – | – | Solid rubber, Sponge rubber, FKM sponge rubber, Silicone, Silicone foam, TPE, TPS, TPU, TPV, ABS, EVA, HD-PE, LD-PE, PA, PP, Rigid PVC, Flexible PVC |
| Profile extrusion from plastics (TPE, TPU, PVC etc.)Plastics | – | – | – | – | ABS, EVA, HD-PE, LD-PE, PA, PP, Rigid PVC, Flexible PVC, TPE, TPS, TPU, TPV |
| Dipped bellows (dipping process on aluminium cores, flexible PVC, NR latex, CR, neoprene,Plastics | – | – | – | small quantities – medium quantities | Flexible PVC, NR latex, CR, Neoprene, Latex, Silicone |
| Molded bellows made of rubber & silicone (with embeddable metal/plastic inserts)Plastics | – | – | – | medium series – Large series | NR, NBR, CR, EPDM, Silicone, PVC, TPE, TPU |
| Rubber convoluted disc bellows (vulcanization of uncured rubber discs using a special process)Plastics | – | – | – | Small series/single requirements | CSM, NBR, CR, EPDM, FKM |
| Fabric bellows / way covers (sewn or thermally welded, with end frames made of steel,Plastics | – | – | – | Single-piece production | Aramid fabric, Calcium silicate fabric, Panox fabric, Silicate fabric, Thermoglass fabric, PUR fabric, PES fabric, PTFE |
| Drawn bellows (rubber-fabric hose drawn over a metal mandrel)Plastics | – | – | – | – | CR rubber with fabric insert, PTFE film (laminated) |
| Plastic turned and milled parts & semi-finished productsMachining | – | – | – | – | PE, PA, PEEK, POM, PTFE, ABS, PP, PPE, PVC, PMMA, PC, PET, PUR |
| Polyurethane cast parts & semi-finished productsPlastics | – | – | – | – | PUR (Platilon, Vulkollan) |
| Roller coatings (wheels, rollers, shafts)Surface | – | – | – | – | Rubber materials, Polyurethane |
| PP/silicone composite sheets (FRANKSA lamination process) for autoclave intermediate layersPlastics | – | – | – | – | PP (natural, grey, with talc), Silicone, Stainless steel |
| 3D-printed parts (prototypes from standard materials)Additive | – | – | – | – | standardly available plastics |
| Assemblies / subassemblies (cold-bonded or vulcanized cuffs, bonded frames)Assembly | – | – | – | – | Rubber, Silicone, Plastic, Fabric |
| Special hoses, hose elbows, wound articles & freehand articlesPlastics | – | – | – | – | Rubber, Plastic |
Additional services