Special caps: prototypes and small-batch production

Need to test a cap on a real part before serial production? Dip moulding, the basis of VINYL-FLEX®production, is ideal for prototypes and small batches. Tools are simple, quick to make and easy to adjust. We provide the first samples free for testing.
Low tooling cost compared with injection moulds
Quick shape changes between prototype versions
Free prototype samples to test on the actual part
Economical from quantities of a few hundred
Flexible VINYL-FLEX® PVC with 60 Shore hardness
Smooth surface without split lines or burrs
Production part matches the prototype, with the same material and process
Choose a cap type Request a sample
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Why VINYL-FLEX® dip moulding suits prototypes and small batches

Injection moulding needs precise two-part steel moulds that take weeks and cost tens of thousands of Czech crowns. Dip moulding uses simple mandrels made much faster and for much less. It can be economical for batches of a few hundred and allows quick shape changes at modest cost.

From free sample to serial production

Using your drawing, sketch, photo or physical part, we make a test tool and first prototypes. We send these free so you can check fit, grip, wall thickness and appearance on the actual part. If needed, we adjust the tool and send revised samples. After approval, we make the agreed batch in your chosen colour and finish.

Small-batch advantages over injection moulding

The main advantage is low initial tooling cost. Changing an injection mould is complex and costly; adjusting a VINYL-FLEX® dip tool is quick and affordable, even when a part design changes during development. The finished cap also has no split lines or burrs and needs no extra finishing.

Typical uses

Testing a new cap’s shape and function before serial production Small batches for limited or seasonal product ranges Replacement caps for older machines without a catalogue alternative Samples for end-customer approval Protective parts for prototype machinery Individual special masking caps for surface treatment

What to prepare before choosing

  • Outside diameter of the part
  • Required cap length
  • Quantity and order frequency
  • Colour and operating conditions

Examples and technical details

Fotografie: krytky dle individuálního návrhu Vinyl-flex
Fotografie: řezání krytek na míru - různé krytky
Fotografie: seundární úpravy krytek - děrování
Fotografie: dle individuálního návrhu Vinyl-flex
Fotografie: nestandardní krytky

Frequently asked questions

The cost depends on the tool shape, but is much lower than for injection moulding. We give an exact price in a free preliminary quotation after reviewing your requirements.
Yes. We provide and send the first samples free for testing on the actual part.
Dip moulding can be economical from a few hundred pieces. The exact minimum depends on the shape and will be stated in our quotation.
Once we have the requirements and approve the design, we can make prototypes in a matter of days. Exact timing depends on shape complexity and current production capacity.
Yes. After approval, we increase the number of dip tools and produce larger batches to the same quality and parameters, without changing material or process.
3D printing can verify shape but cannot reproduce flexible PVC’s elasticity, chemical resistance, sealing and surface quality. A dip-moulded VINYL-FLEX® prototype functions like the production part.

STANDARD SIZES

Know the size? Choose a standard cap in our online shop.

If you are unsure, request a sample or send us a drawing.

Visit the online shop Or request a custom solution →