In the construction process, we often need to extend waterstops to meet the size requirements. We often adopt cold joint method, hot melt knife joint method and hot melt machine joint method to extend the waterstop. Here we'd like to briefly introduce the hot melt machine and welding steps required in the hot melt machine joint method.
Rubber waterstop welding machine, also known as waterstop hot melt mould or waterstop connection equipment, is a kind of hot melt mould for rubber waterstop joint. It consists of a hot melt mould and a control cabinet. When using the mould, you also need a jack. There is a heating element connecting with the control box in the mould. The interface shape of the mould shall be the same as the rubber waterstop head to be heated. A temperature controlling device is installed in the middle of the mould. The material of the raw rubber strip used in welding is similar to the rubber waterstop, and has a strong affinity. The vulcanizing agent in the raw rubber strip spreads to the joint interface and crosslinks with the remaining double bonds of the vulcanized rubber to form a co-vulcanization system. In this way, the two waterstops are jointed together.
The hot welding machine joint method adopts the hot vulcanization mould (hot melt welding machine) that matches up with the rubber waterstop head to be welded and raw rubber strip for field hot vulcanization connection. It is difficult to conduct the connection yet with desired joint effect and is especially suitable for projects with strict quality requirements.
The connection steps of the rubber waterstop are as follows: