Basic principles of plastic sealing

Plastic sealing is a technique for joining materials that is used in many industries, such as automotive, medical and packaging. This process involves bringing the surfaces of the parts to be joined to a plastic state and joining them under appropriate pressure. To achieve durable and aesthetically pleasing seals, it is necessary to follow the basic principles of the process.

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Selection of appropriate process parameters

The first step in plastic sealing is to precisely define parameters such as temperature, time, and pressure. Every material has a different melting point, so it is crucial to adapt the temperature of the machine to the specific material. Too low a temperature will not allow the surfaces to melt properly, while too high a temperature can lead to degradation. The sealing time and pressure must be adjusted to ensure an even bond over the entire length of the seal. Plastic sealing equipment is available from Zemat Technology Group.

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Plastic surface preparation

Thorough surface preparation of the parts to be joined is another important step in the process. Surfaces must be free of contaminants such as oils, dust or production residues that can reduce the quality of the seal. Appropriate chemicals are used for cleaning, for example isopropyl alcohol, which effectively removes grease and evaporates without leaving any residue. In some cases, gentle sanding is recommended to improve the adhesion of the material.

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Adapting the technique to the type of material

The choice of the appropriate sealing method depends on the type of material and the technical requirements of the project. The most common techniques include thermal, impulse and high-frequency sealing. Each of these methods requires a different approach and equipment. By understanding the material properties, the process can be optimised. Zemat Technology Group offers plastic sealing equipment.

Quality control and seal tests

Once the sealing process is complete, it is necessary to carry out a quality check of the joints. It is important to check that the seals are even, durable and aesthetically pleasing. For joints that require special strength, strength tests are carried out to assess whether the seal meets certain standards. Regular testing and monitoring of the equipment’s operating parameters is a guarantee of the high quality and reliability of the joints made.