Technical OE products

Stamped and deep-drawn steel parts to your drawing

Pressing up to 630 t, welding, injection moulding, zinc plating, powder coating and assembly in one plant in Slovenia.
Stamped and deep-drawn steel parts to your drawing

OE parts from a castor manufacturer

For 70 years we have pressed parts that rotate and swivel under load: castors, wheels and their housings.

The same presses, plating lines and assembly lines make stamped, deep-drawn and welded parts to your drawing.

Castor housings have to hold tight tolerances and low friction for years under load. We apply the same knowledge to technical OE parts for other industries.

Our own surface treatment department zinc electroplates, passivates and powder coats the parts, so they leave the plant finished.

Pressing, welding, moulding, plating and assembly are planned as one job, which keeps the number of suppliers in your project down to one.

Deep drawing

Sheet up to 10 mm thick and 1000 mm wide.

Transfer pressing

Sheet up to 5 mm thick and 600 mm wide, for high volumes.

Zinc electroplating

10 to 15 µm, up to 240 h in the salt spray test.

Powder coating

Single layer up to 100 µm, more than 500 h in the salt spray test.

ESE
Europlast
Gebhardt
Green City
FACOM
SIP
Plastoform
SULO
Trimex
Weber
ESE
Europlast
Gebhardt
Green City
FACOM
SIP
Plastoform
SULO
Trimex
Weber

Processes under one roof

Progressive press tool stamping steel parts

Mechanical, transfer and servo presses from 100 to 630 t, for small series and high volumes.

  • Classic stamping
  • Transfer and servo pressing
  • Deep drawing
Robot welding of steel parts

Spot, MIG, MAG and circumferential welding of steel assemblies, on 4 circumferential welding machines and 3 manual setups.

  • Circumferential welding
  • Manual welding
Automated assembly station with pneumatic grippers

We assemble parts and sub-assemblies into complete, ready-to-use products, on 6 automatic and 5 manual assembly lines.

  • Automatic assembly
  • Manual assembly
Mould in a plastic injection moulding machine

Plastic parts in PA, PP, PU, PE and TPE on 9 injection moulding machines up to 350 t, one of them for 2K moulding.

  • Thermoplastic injection moulding (PA, PP, PU, PE, TPE)
  • 2K injection moulding
Yellow powder-coated rims on the line

Cr6+-free zinc electroplating with passivation on a rack line and a barrel line, and powder coating. We also plate and coat steel parts that customers send us.

  • Zinc electroplating and passivation
  • Powder coating
Forming tool on a production machine

Trimming, rolling and curling of pressed parts to final dimension. Laser-cut blanks and CNC machining we buy in from partners when a part needs them.

  • Trimming
  • Rolling
  • Curling

Split supply chains

What goes wrong when every step has its own supplier

  • Parts travel between press shop, welder, plater and assembler
  • Each transport adds cost and days
  • Quality problems are hard to trace back to one supplier
  • Delays at one subcontractor stop the whole chain

Ask us

One plant

What one plant changes

  • Pressing, welding, moulding, plating, coating and assembly in Postojna
  • No transport between process steps
  • One quality system (ISO 9001) and one contact
  • Shorter lead time from coil to finished part

Request a quote

Machine park by process

The machines and their limits per process. If your part fits inside these figures, we can make it in Postojna.

Classic stamping and forming

Punching, embossing, flanging and coining of flat sheet with progressive and single dies.

  • Maximum press force: 500 t
  • Maximum stroke: 400 mm
  • Maximum material thickness: 7 mm
  • Maximum workpiece: 1500 x 1000 mm

Transfer and servo pressing

We run three transfer presses, a new Mossini and two older presses from Ravne and Erfurt. In transfer pressing the part moves through several stations in one press, which allows complex shapes with good material yield. The Mossini transfer press takes sheet up to 5 mm.

Our Mossini servo press works from coil, with a decoiler, a straightener and a zig-zag feeder, and forms sheet up to 10 mm. A torque motor drives the crank directly, without flywheel or clutch, so the speed and position of the slide are programmed for each part, for example slower through the draw and faster on the return stroke. The zig-zag feeder shifts the strip sideways between strokes, so round blanks nest closer and less scrap is left.

  • Maximum press force: 630 t
  • Maximum stroke: 420 mm (transfer)
  • Maximum material thickness: 10 mm
  • Output: up to 38 parts per minute

Deep drawing

A punch draws the sheet blank into the die to form hollow, seamless parts that can be deeper than their diameter.

  • Maximum press force: 630 t
  • Maximum stroke: 1000 mm
  • Maximum workpiece: 1200 x 1200 mm
  • Maximum material thickness: 10 mm

Circumferential and manual welding

Circumferential welding for round parts such as rims and hubs, and manual welding for assemblies and small series.

  • Synchro pulse technology
  • Triple simultaneous welding
  • Circumferential welding machines: 4
  • Manual setups: 3

Thermoplastic injection moulding (PA, PP, PU, PE, TPE)

Plastic parts and wheels with tight dimensions and a clean surface, in standard or special materials.

  • Injection moulding machines: 9 (80 to 350 t), one of them for 2K
  • Maximum clamping force: 350 t
  • Special materials: conductive, heat-resistant, glass-fibre reinforced

2K injection moulding

2K moulding combines two materials with different properties, colours or hardness in one part, for example a hard wheel centre with a soft tread, without a second assembly step.

  • 2K injection moulding machine: 350 t

Automatic and manual assembly

Automatic lines for high-volume castors and sub-assemblies, manual lines for small series and variants.

  • Automatic assembly lines: 6
  • Manual assembly lines: 5

Zinc electroplating and passivation

The zinc layer protects the steel, and the passivation on top slows the zinc itself from corroding. Our lines are Cr6+-free.

  • Rack line: 1,100 kg per hour
  • Barrel line: 1,000 kg per hour
  • Blue passivation, Cr(III) based
  • Cr6+-free

Powder coating

Powder coating gives a thicker and harder finish than wet paint, with almost no solvent emissions.

  • Powder types: polyester, epoxy-polyester
  • Finish: gloss, semi-gloss, matt
  • Maximum workpiece: 1500 x 800 x 700 mm

Trimming, rolling and curling

Trimming removes material from the edge of a pressed part to give a clean, even edge. Curling rolls the edge into a round profile, which makes the part stiffer and removes the sharp edge.

  • Trimming setups: 6
  • Curling setup: 1

Quality control

Parts are inspected at each production step, and new products are tested in our own lab before series production.

Quality control
Quality control
Quality control
Quality control
Checking a part with a digital dial gauge

Inspection

Inspection at every stage of production, under our ISO 9001 quality system.

Castor on a test bench

Testing

Our lab tests durability and strength under conditions that copy real use, indoors and outdoors.

  • Test setups for the required standards (EN 840-5, RAL-GZ 951/1 and others)
  • Salt spray chamber (ISO 9227)
LIV engineers inspecting parts in production

Simulation

Before a new part goes to tooling, FEM simulation predicts how it will behave under load, so the design can be adjusted first.

  • Finite element method (FEM) analysis
Research and development
CAD models
3D Scanning
Reverse engineering

Research and development

Our R&D team develops custom parts and improves existing ones for cost, function and production.

CAD models

We design in 3D CAD, so a part can be checked and changed before any tool is made.

3D Scanning

We use 3D scanning to measure parts without contact, for quality control, reverse engineering and development.

Reverse engineering

From an existing part or sample we build the drawing and the 3D model, so the part can be improved or produced again.

From drawing to series production

1

Step 1

Drawing and quantities

You send us the idea or drawing, the quantities and the timeline. Our engineers prepare the CAD model and point out anything that would make the part hard to press, weld or plate.

2

Step 2

Prototype

When the CAD model is approved, we make a prototype, with laser-cut blanks from a partner where needed, and check it against your requirements.

3

Step 3

Prototype approval

You test the prototype. We correct what needs correcting before any tool is built.

4

Step 4

Tooling and process

After approval we design the tools and the production flow, planned for cycle time, material yield and cost.

5

Step 5

Trial series

A trial series from the series tools validates the process and the part before full production.

6

Step 6

Series production

The part goes into series production on the approved tools and process.

What do you need from us?

Your project

01

A new part

You have an idea or a drawing and need a supplier to develop and produce the metal part.

02

An improved existing part

You want an existing part changed for new specifications, lower cost or easier production.

03

A second source or new supplier

You need a supplier for a part that is already in production, with steady quality and delivery.

Why OEMs work with us

One plant

Pressing, welding, moulding, plating, coating and assembly on one site in Postojna.

Certified quality

Quality management to ISO 9001 and environmental management to ISO 14001, with inspection at each production step.

Prototype to series in weeks

Short lines between design, toolmaking and production let us move from a first idea to series parts in weeks.

Engineers who speak to engineers

Your engineers talk directly to ours about drawing, tolerance and process.

Cost per part

Each process is planned to save time, energy and material on your order.

70 years of pressing

We have formed steel for castors, wheels and rims since 1954.