Tool repair Bringing welding to the mould house floor

Editor: Eric Culp

Special technology allows toolmakers to perform their own welding on moulds, and cutting downtime helps reduce costs, according to supplier Joke.

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Toolmakers no longer need to send away their moulds for welding work because they can do it themselves in-house.
Toolmakers no longer need to send away their moulds for welding work because they can do it themselves in-house.
(Source: Joke Surface Technology)

Plastic injection moulders, metalworkers and automobile suppliers cannot survive without welding. Its use is widespread in the die and mould industry, where a day-to-day occurrence is the requirement for tooling repair. With its Multi-Spot welding application, Joke Surface Technology said it is providing an option that is simple and flexible in a similar manner to conventional tungsten inert gas welding (TIG), but is comparable to the precision of a laser and even surpasses the latter in terms of hardness and durability.

The spectre of a stoppage

At Germany’s LKH Kunststoffwerk Heiligenroth, a highly complex, 2-part stack mould running in 3-shift operation on a 700-tonne machine was faulty. An estimated three weeks were required for dismantling and repair of the defective mould. Since the company outsources to an external laser welding repair service, this stoppage was expected to have caused a considerable loss of turnover.

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Many tool and mould companies are familiar with this situation. In some sectors, the first contractual penalties loom after only a few minutes if production lines stop. This is why it is essential to conduct repair welding work rapidly. The easiest way is to perform these tasks directly on the machine without expenditures for dismantling and reassembly.

LKH produces high-quality plastic components for customers in the electrical, automobile and packaging industries on 50 injection moulding machines with closing forces of 25-1,000 tonnes. The company accepts assignments that include engineering, production and logistics and is part of the Friedhelm Loh Group, which employs 11,500 workers all over the world.

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