In 1929, Adolf Liedgens ventured into self-deployment in Solingen and founded what is now ALW Kunststofftechnik GmbH. At this time the company focused on wood processing and manufactured umbrella handles and accessories for the weaving industry. In 1956, Adolf Liedgens moved his business to its current headquarters in Weyerbusch in the Westerwald, where he purchased the first injection molding machine just five years later: From now on, the company no longer only served the wood market, but also the plastic market.

Soon afterwards, Karl Liedgens, son of the founder, took over management. While previously only products were manufactured for supply, Karl Liedgens now increasingly developed his own products, some of which he patented. This era also saw the development of flow control devices — a success story that continues to this day.

In the late 90s, Karl Liedgens’ wife Ingeborg Liedgens took over management. In order to better meet new requirements, the company underwent another change in 2018, almost thirty years later: Ingeborg Liedgens and the long-time operations manager Frank Mudersbach founded ALW Kunststofftechnik GmbH. Both acted as partners.

At the beginning of 2024, Ingeborg Liedgens withdrew from day-to-day business, and Frank Mudersbach has been responsible as managing partner since then. As operations manager, he brought new ideas with him: a photovoltaic system was installed on the hall roof and investments were made in new peripheral devices, including granulate mills and drying devices, in order to be able to produce more energy-efficiently, among other things. As a result, new injection molding machines were also purchased. In constant collaboration with its customers, ALW Kunststofftechnik  GmbH also optimizes its flow control devices, for example expanding their areas of application according to customer requirements: They are no longer only equipped with welding machines, but they are also used in the packaging industry. Today, ALW Kunststofftechnik GmbH supplies customers worldwide, from Europe to China and America to Brazil.