Hotset GmbH

DH system: System for partial dynamic temperature control of injection molds. Concentration of energy on segmented part problems to avoid surface defects. Technical possibilities: Molding of microstructures, production of microcomponents, avoidance of surface defects and thin-wall injection molding. The system is particularly characterized by energy-efficient and targeted temperature control and supports the injection molding process.

From heating elements to thermosensor technology and process control, the Lüdenscheid-based company hotset has been developing clever product and system solutions since 1973. One of the system solutions is the DH system (Dynamic Heat System). This is used for dynamic temperature control of injection molds. hotset is the technology leader in this field and has been a thermodynamics specialist for 50 years. Hotset GmbH is the sole manufacturer of the DH-System. The DH-System is the problem solver for various customers internationally for weld line problems of surface components. This system promotes the realization of quality-increasing, sustainable and energy-saving processes.

With the DH-System, hotset offers moldmakers in the injection molding industry a high-speed process for partial cyclic tempering, which on the one hand avoids optical defects (visible weld lines, dull halos, etc.), but on the other hand allows the realization of filigree fine structures and very thin wall thicknesses. Synchronized with the injection molding process, the cavities can thus be heated and cooled selectively or in sections at a fast heating rate of up to 60 K/s – enabling very rapid temperature changes in short cycles. Manufacturers of injection molded parts for the consumer and automotive industries can thus improve the surface quality of their products and open up new perspectives for lightweight construction and miniaturization.

The DH system acts faster, more accurately and more economically. Compared with the variothermal method, it is significantly more productive, economical and sustainable. It uses 50 times less energy in the heating phase alone.


DH system: Energy-efficient temperature control of injection moulds




World wide: 348

Germany: 153

South Westphalia: 153

Sales Volume

2022: 21,47 Mio. €



Establishment of production facility in Malta


Relocation to Hueckstraße


Foundation of Hotset Singapore Pte Ltd.


Foundation of Hotset America Corporation


Foundation of Hotset Heating Elements (Suzhou) Co. Ltd


Foundation of HIPL India Pvt Ltd. and development of the DH system


System center for industrial temperature control technology with own injection molding machine


Development D-System


Acquisition of iQtemp – system partner for conformal cooling and acquisition of Hotset UK


Hotset GmbH
Hueckstraße 16

Phone +49 2351 4302-460

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