Trends in the injection moulding sector

During the familiar summer Forum organized by Krauss Maffei at their facilities in Munich, interesting presentations on new trends in the sector of the transformation could be heard. We focus here on the injection.

Now, consider the set of the manufacturing process has a future, as evidenced by the production of large external pieces of cars with modern techniques of colored. To obtain a surface free of defects and aesthetic pieces it is absolutely necessary to improve the development of the production from the manufacture of the basic mixture and transporting the material to the finished molded piece. The main factors of stimulation for processes and technologies newly developed are reducing costs and new products, requiring new manufacturing processes. However, today, truly new products have lost importance to projects aimed at the reduction of the costs of production of existing products. In my opinion equally creative to unite three different pieces of one-piece construction without that it lose its functionality, build something again.

One of the new most innovative technologies of the molding by injection of recent years is the technology of multiple colors or components, known in the background already since the 1960s. However, this possibility of rationalization is used only for some years. Typical applications along with the proven rear headlights of multiple colors are levers with bright outer layer and reinforced basic material of glass fibres, closures threaded with seal, handles with parts of elastomer in good touch, etc.

Elimination of some phases of the process

Often, the typical pieces of decoration of the inner lining in automotive were produced and also occur today with the method of lamination by gluing before molded one-piece. With décor by injection, the decorated by stamping, which manufacturing costs are significantly reduced, this phase of the process can be removed. Success is only possible with a good cooperation of all participants in the process of development of the decorated by stamping, i.e. the manufacturer of the article, the supplier of material for decoration, the Builder of the moulds and instruments of operation, and the supplier of the machines.

 

Lower power consumption

With the new pumps and pump systems newly developed, hydraulic drives use considerably less energy. The regenerative system of pumps based on the proven constant bombs contributes between 20% and 50% saving of energy. The exact fee always depends on the point of operation. The regenerative system of pumps consists of an adjustable internal gear and a pump of axial piston pump whose interaction, i.e. the connection and disconnection of the internal gear pump and respectively regulated adjustment of axial piston pumpIt leads to good energy balance. On the interaction of the bombs, the angle of rotation adjustable in negative sense of the axial piston pump is used in such a way that in certain States of load, the pump works as an engine.

Reduction of material consumption

The necessary polymer for the manufacture of consumer goods cause 80% of manufacturing costs, and in the manufacture of technical parts 50%. The great potential of measures to reduce the costs normally takes advantage of constructive measures, such as for example the striated to compensate for the thickness of wall. Apart from this, there are also examples for the reduction of costs through innovative production technology.

Reduction of costs through high-performance machines

Many items of consumer goods may only occur with greater profitability drawing on all possible production capacity.

The broad spectrum of these machines ability is a consequence of the parallel operation of all vital functions of the machine, the shorter time of movement, and the high speeds of injection. Therefore the Sprintermachines, for example, have a sophisticated hydraulic concept. It is founded on the elements of the machinery standards and includes other hydraulic components for the making available right away of additional capabilities, e.g. an accumulator of pressure of the High-Flow type. All machines have a plasticizing with hydraulic drive of spindle with which the plasticizing process is completely independent of other movements. Closure unit is equipped with an own hydraulic drive and also moves independent of the other phases of the cycle.

Dr. Hans Wobbe
Krauss-Maffei Kunststofftechnik GmbH