Contract welding specialist for ultrasonic joining of plastics and metals – from prototypes to series production, from a quantity of 1.
lsm ultraschall-verbindungstechnik GmbH & Co. KG
Hirschaid (Röbersdorf)New on Amplifa
Ultrasonic joining technology as contract manufacturing
lsm ultraschall-verbindungstechnik GmbH & Co. KG is a contract manufacturing company based in Hirschaid-Röbersdorf (Bavaria) specialising in ultrasonic joining technology. The company welds thermoplastics (welding, spot welding, cut-and-weld, cutting, flanging, riveting) as well as metals such as copper, brass and aluminium, including by compacting wire strands and torsional terminal welding. Further services include embedding metal parts in plastics, hot-element riveting, deburring, machining, assembly, kitting and packaging. Production starts at a quantity of 1 – from prototypes and samples through to series production. In addition, lsm offers joining technology consulting as well as trading in ultrasonic welding machines and components such as sonotrodes, converters, boosters and generators. Customers come from the packaging industry, the automotive industry, electrical engineering/electronics as well as industry, technology and trades; seam welds for solar collectors are also produced. Since 2007 the company has been certified to ISO 9001 (TÜV Rheinland).
- Site
- Hirschaid
- Processes
- Ultrasonic welding of thermoplastics (longitudinal/torsional), Ultrasonic welding/compacting of metals (copper, brass, aluminium), Ultrasonic spot welding, Ultrasonic cut-and-weld (cut'n'seal), Ultrasonic cutting, Ultrasonic flanging, Ultrasonic riveting, Embedding of metal parts in thermoplastics
- Materials
- ABS, Polypropylene (PP), Polyethylene (PE), Polyamide (PA), Polycarbonate (PC), PMMA, Copper, Aluminium
- Certificates
- ISO 9001
- Founded
- 1997
- Industries
- Packaging industry, Automotive industry, Electrical engineering/electronics, Industry, technology and trades, Solar industry (solar collectors), Solar collectors (seam welding)
- 01
Joining technology consulting
- 02
Ultrasonic welding / hot-element riveting
- 03
Deburring / machining
- 04
Inspection
- 05
Assembly
- 06
Kitting
- 07
Packaging
Materials and processes
ABS
Thermoplastic for ultrasonically welded technical components.
Polypropylene (PP)
Ultrasonically weldable plastic, among other things for packaging.
Polyethylene (PE)
Suitable for thermally gentle ultrasonic joints.
Polyamide (PA)
Engineering plastic for welded components with high requirements.
Polycarbonate (PC)
For clean, strong ultrasonic welding joints.
PMMA
Acrylic plastic for optically clean weld seams.
Copper
Ultrasonic welding and compacting of wire strands, films and busbars.
Aluminium
Thin sheets and films are joined without melting.
Brass
Metal joining by ultrasonics, among other things contacts.
Ultrasonic welding longitudinal/torsional
Thermally gentle friction welding process for plastics and metals.
Hot-element joining technology
Riveting and embedding of metal parts in plastics.
Site
Hirschaid (Röbersdorf)
DEHeadquarters / Production
- Lot size
- Prototypes to series production, from a quantity of 1
- Materials
- ABS, PP, PE, PA, PC, PMMA, copper, brass, aluminium
- 5x TELSONIC USP 750 (35 kHz)
- 1x TELSONIC USP 750 torsional (20 kHz)
- 1x SONOTRONIC ECO iSonic (35 kHz, 800 W)
- 10x TELSONIC USP 2500 (20 kHz, up to 3,000 W)
- 2x TELSONIC USP 3000 (20 kHz, up to 3,000 W)
- 1x SONOTRONIC ECO iSonic (20 kHz, 3,000 W)
- 1x TELSONIC USP 450 (20 kHz, 350 W)
- 2x hand welding unit (35 kHz, up to 1,000 W)
- 2x hot-element riveting/press-fit machines (up to 500 W)
Components and applications
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Ultrasonic welding of thermoplastics (longitudinal/torsional)Joining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Ultrasonic welding/compacting of metals (copper, brass, aluminium)Joining | – | – | – | 1 piece | Copper, Brass, Aluminium |
| Ultrasonic spot weldingJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA, Copper, Aluminium |
| Ultrasonic cut-and-weld (cut'n'seal)Joining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Ultrasonic cuttingJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Ultrasonic flangingForming | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Ultrasonic rivetingJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Embedding of metal parts in thermoplasticsJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA, Copper, Aluminium, Brass |
| Compacting/consolidating of wire strandsJoining | – | – | – | 1 piece | Copper, Brass, Aluminium |
| Terminal welding (torsional)Joining | – | – | – | 1 piece | Copper, Aluminium |
| Wire bondingJoining | – | – | – | 1 piece | Copper, Aluminium |
| Ultrasonic seam welding with rolling sonotrodesJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Hot-element rivetingJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Hot-element embedding of metal partsJoining | – | – | – | 1 piece | ABS, PP, PE, PA, PC, PMMA |
| Screw jointsAssembly | – | – | – | 1 piece | – |
| Adhesive jointsJoining | – | – | – | 1 piece | – |
| Snap-fit jointsAssembly | – | – | – | 1 piece | – |
| Press-fit jointsJoining | – | – | – | 1 piece | – |
| Pressure testing up to 11 barInspection | – | – | – | 1 piece | – |
| Vacuum testingInspection | – | – | – | 1 piece | – |
| Tensile testing up to 1,000 NInspection | – | – | – | 1 piece | – |
| Dimensional inspectionInspection | – | – | – | 1 piece | – |
| Microsection of the weld seam (destructive testing)Inspection | – | – | – | 1 piece | – |
| DeburringSurface | – | – | – | 1 piece | – |
| Machining (e.g. drilling, thread tapping)Machining | – | – | – | 1 piece | – |
| Subassembly and final assemblyAssembly | – | – | – | 1 piece | – |
| Kitting and packagingAssembly | – | – | – | 1 piece | – |
| Joining technology consulting (feasibility studies, design consulting)Engineering | – | – | – | 1 piece | – |
9 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Standard ultrasonic welding machine | TELSONIC USP 750 - 35 kHz | 5 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine (torsional) | TELSONIC USP 750 torsional - 20 kHz | 1 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine | SONOTRONIC ECO iSonic - 35 kHz, 800 W | 1 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine | TELSONIC USP 2500 - 20 kHz, up to 3,000 W | 10 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine | TELSONIC USP 3000 - 20 kHz, up to 3,000 W | 2 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine | SONOTRONIC ECO iSonic - 20 kHz, 3,000 W | 1 | – | – | Hirschaid/Röbersdorf |
| Ultrasonic hand welding unit - 35 kHz, up to 1,000 W | – | 2 | – | – | Hirschaid/Röbersdorf |
| Standard ultrasonic welding machine | TELSONIC USP 450 - 20 kHz, 350 W | 1 | – | – | Hirschaid/Röbersdorf |
| Standard hot-element riveting/press-fit machine - up to 500 W | – | 2 | – | – | Hirschaid/Röbersdorf |
Additional services
Quality
Every welded joint is produced under defined parameters and documented. Inspection includes pressure testing up to 11 bar, vacuum testing, tensile testing up to 1,000 N, dimensional inspection as well as microsectioning of the weld seam (destructive testing); the company has been certified to ISO 9001 since 2007 (TÜV Rheinland, cert. no. 01 100 071930).
| Evidence | Hirschaid (Röbersdorf) |
|---|---|
| ISO 9001 |
History
- 1997
Foundation of lsm ultraschall-verbindungstechnik GmbH & Co. KG by Ludwig Schwarzmann in the family basement.
- 2005
Move into the new company building in Röbersdorf/Hirschaid, today's headquarters.
- 2007
Initial certification to ISO 9001 by TÜV Rheinland.
- 2025
Transfer of company management to the second generation with Martin Eichner, son-in-law of the founder.