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Hydraulic press
PRH Series Zemat Technology Group

Treatment or processing of wood consists in placing the raw material in a hydraulic press mould, which is installed on the table, and closing the mould until the pressure force is obtained up to several kilograms per square centimeter of the material surface. The mould is connected with the HF generator, which is responsible for heating the processed charge, by means of metal strips. To put it simply, the heating method may be compared to a microwave oven, i.e. the processed material is heated directly.

Gluing:

In the case of gluing adhesive is heated- more specifically water contained in it. Within the time of several seconds up to several minutes adhesive is heated to polymerization temperature (80-110°). Keeping the material under pressure for the next several minutes results in fixing the product shape given by the mould and completing essential chemical processes occurring in the adhesive. The total process duration is between 2 and 20 minutes, depending on the charge thickness and surface as well as the amount of adhesive spread. The surface of charges may approach 2m, the width 100mm. It should be noted that the heating time of adhesive (the operating time of HF generator) constitutes 30-50% of the process duration. Energy consumption is limited to an essential minimum since the controlled amount of energy is generated directly inside the charge for allotted period of time.