Precision molded and multi-component parts made of silicone (LSR/HTV), rubber, TPE and plastic by injection molding, Berlin.
Weha-Gummiwaren-Fabrik Holzberg GmbH & Co. KG
Kleinmachnower Weg 9-11, 14165 Berlin · GermanyNew on Amplifa
About WEHA-Gummi
Weha-Gummiwaren-Fabrik Holzberg GmbH & Co. KG is a family-run, medium-sized company in Berlin that has been processing elastomers since 1949. At its location in southwest Berlin, the company manufactures customer-specific precision molded parts and multi-component parts from silicone rubber (LSR and HTV), rubber from natural and synthetic rubbers, thermoplastic elastomers (TPE) and thermoplastics such as PBT with 45 employees. Injection molding realizes shot weights from 0.01 g to 300 g and part surfaces up to approximately DIN A4; the machine park comprises injection molding machines with clamping forces from 300 to 1,100 kN. In addition to classic single-component injection molding, multi-component parts are produced by hand insertion, two-injection-unit machines with rotary table and linked systems, including rubber-metal, silicone-ceramic and plastic-LSR bonds. The range of services includes design consulting, prototypes in the original material, assembly of sub-assemblies (also in cleanroom and EMC-shielded environments), function tests, printing, packaging and worldwide logistics including customs clearance. Customers come from the automotive industry, medical technology, household and sanitary technology, communications technology, mechanical engineering, ventilation and air-conditioning technology, and consumer goods.
- Site
- Berlin
- Processes
- Injection molding (elastomers: rubber, silicone), Injection molding (thermoplastic elastomers TPE), Injection molding (thermoplastics), Multi-component injection molding (hand insertion, 2 injection units, rotary table, linked systems), Assembly of sub-assemblies (also EMC-shielded, cleanroom), Bonding, potting, hot stamping, printing, (individual) packaging, Function tests with test fixtures, Prototypes in the original material
- Materials
- Liquid silicone rubber (LSR), Silicone rubber (HTV), Rubber (vulcanizates made of natural and synthetic rubbers), NBR, FKM (Viton), Thermoplastic elastomers (TPE), Thermoplastics (plastics), PBT
- Certificates
- ISO 9001:2015, IATF 16949
- Founded
- 1949
- Employees
- 45
- Industries
- Automotive industry, Medical technology, Household technology, Sanitary technology, Communications technology, Mechanical engineering
- 01
Design consulting / Engineering
- 02
Prototype in original material
- 03
Toolmaking (Weha standard mold system)
- 04
Injection molding / multi-component injection molding
- 05
Surface modification (chlorination/fluorination)
- 06
Assembly of sub-assemblies
- 07
Function tests
- 08
Printing and packaging
- 09
Logistics including customs clearance and worldwide shipping
Materials & Processes
Liquid Silicone Rubber (LSR)
Heat-resistant from -50 to +250 °C, plasticizer-free and biocompatible; for medical technology, food sector, automotive and drinking water applications (e.g. KTW, DVGW W270, FDA).
Silicone rubber (HTV)
For high-temperature resistant molded parts such as brake pads and seals in household and industrial applications.
Rubber (vulcanizates made of natural and synthetic rubbers)
Cross-linked elastomers with a wide range of compound properties for seals, dampers and bonds.
Nitrile rubber (NBR)
Oil-resistant elastomer for tolerance rings, wipers and connector sockets.
FKM (Viton)
For damping elements with high temperature and media resistance.
Thermoplastic elastomers (TPE)
Processable like plastic and elastic; for seals and multi-component bonds.
Thermoplastics (e.g. PBT)
For dimensionally stable plastic parts such as Ex-rated probes (PBT+LSR).
Ceramic and metal composites
Silicone and rubber bonds with metal, plastic or ceramic for multi-component functions.
Location
Berlin
DEProduction and administration
- Part weight / size
- 0.01–300 g
- Lot size
- small to large quantities
- Materials
- LSR, HTV, rubber, NBR, FKM, TPE, thermoplastics
- Injection molding machines 300–1,100 kN
- Two-injection-unit machine with rotary table
- Linked injection molding systems
- Robot-assisted demolding
- Optical 3D measuring machine
- Tensile/compression testing device
- Shore hardness tester
- Precision analytical balance
- Microscope
- Rheometer
Parts
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Injection molding (elastomers: rubber, silicone)Plastics | DIN ISO 3302-1 tolerance classes M1-M4 | DIN A4 (area) | 0.01 g – 300 g | small quantities – large quantities | Silicone rubber (LSR), Rubber (natural and synthetic rubber), HTV |
| Injection molding (thermoplastic elastomers TPE)Plastics | – | DIN A4 (area) | 0.01 g – 300 g | – | TPE |
| Injection molding (thermoplastics)Plastics | – | DIN A4 (area) | 0.01 g – 300 g | – | Thermoplastics (e.g. PBT) |
| Multi-component injection molding (hand insertion, 2 injection units, rotary table, linked systems)Plastics | – | – | – | – | Rubber-metal, Rubber-plastic, Silicone-metal, Silicone-plastic, Silicone-ceramic, Plastic-plastic, LSR-LSR, Plastic-LSR, PBT+LSR |
| Assembly of sub-assemblies (also EMC-shielded, cleanroom)Assembly | – | – | – | – | – |
| Bonding, potting, hot stamping, printing, (individual) packagingAssembly | – | – | – | – | – |
| Function tests with test fixturesTesting | – | – | – | – | – |
| Prototypes in the original materialPlastics | – | – | – | – | Silicone, Rubber, TPE, Plastic |
| Overmolding of cables/connectors (LSR overmolding)Plastics | – | – | – | – | LSR |
| Quality inspection: optical 3D measurement, tensile/compression testing, Shore hardness,Testing | – | – | – | – | – |
| Design for manufacturability consulting / Engineering (data exchange STEP, IGES, DWG)Engineering | – | – | – | – | – |
| Chlorination of rubber parts / fluorination of silicone parts (surface modification)Surface | – | – | – | – | Rubber, Silicone |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection molding machine | – | – | Clamping force 300 kN to 1,100 kN, shot weight 0.01-300 g | – | Berlin |
| Two-injection-unit machine with rotary table | – | – | – | – | Berlin |
| Linked injection molding system | – | – | – | – | Berlin |
| Optical 3D measuring machine | – | – | – | – | Berlin |
| Tensile/compression testing device | – | – | – | – | Berlin |
| Shore hardness tester | – | – | – | – | Berlin |
| Precision analytical balance | – | – | – | – | Berlin |
| Microscope | – | – | – | – | Berlin |
| Rheometer | – | – | – | – | Berlin |
| Robot-assisted demolding | – | – | – | – | Berlin |
Additional services
Quality Management
A quality management system certified to ISO 9001:2015 (DQS) forms the basis of process-reliable manufacturing; due to many years of IATF 16949 certification, many requirements of this automotive standard are applied. Testing is carried out, among other things, with an optical 3D measuring machine, tensile/compression testing device, Shore hardness tester, precision analytical balance, microscope and rheometer, as well as customer-specific test equipment.
| Evidence | Berlin |
|---|---|
| ISO 9001:2015 | |
| IATF 16949 |
History
- 1949
Foundation of the company; start of the manufacture and processing of elastomers in Berlin.