Demolding procedure

Using such a demolding procedure, it is important to create first space outside before expanding the molded part (Figure 1.21). 

Then the moldings, as in injectirMi molding, are demolded by ejection devices and the mold is cleaned by means of a blower device. Since volatile components are produced during curing of, for example, phenolic resins and aminoplast masses, ventilating the mold by raising the upper die briefly and sucking out the air is a useful procedure. 

These additives are not uniformly distributed, resulting in matte spots. The lubricants also act as mold release agents, an effect that is desirable for demolding. When the part is to be painted, on the other hand, additional washing and drying procedures are required to achieve paint adhesion. 

Once the curing procedure was complete, the setup was cooled down and demolded to obtain the copolyester modified polystyrene shape memory polymer (CP-PSMP) composite. 

The FRD was set at the range of 37-39 kg/m to ensure the resulted molded foam is in the range of 42-45 kg/m The above procedures were repeated and the mixmre was poured into a pre-waxed mold, covered and screwed tight. The PU was demolded after 30 min. The molded density was calculated using Equation (2). 

In the transfer technology, filling and fusion of the molded part is done in a hot mold. Afterwards, the uncooled molded part is transferred to the cold mold and is then cooled to demolding temperature. This procedure also reduces the energy consumption because the mold is not cyclically heated and cooled. The disadvantage is that two molds are used at the same time, so higher investment costs occur. The quality of the molded part is also lower than in conventional processes. 

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