Coiling Process of Epoxy Laminating Tube
Manufacture of epoxy tubes and rods is the same as for epoxy laminated sheets, and is based on a dry, adhesive base material. The adhesive materials used mainly are plain glass cloth and paper impregnated with phenolic resin or phenolic epoxy resin. Only in some cases can cotton cloth with the same resin be used. Both the pipe and the rod are formed by the winding method.
When the pipe is formed by the winding method, the mold release agent is first coated on the core. The demoulding agent can be made of Vaseline, bitumen, and paraffin by mixing and cooling by mass than 1.5:1:1. When used, the use of turpentine is diluted into a paste. The core coated with a demoulding agent must be coated with a section of adhesive material as the substrate and then put between the two supporting axes and put down the roller to press the core. The adhesive material around the winding machine is straightened so that it is connected to one end of the film, and then the speed is speeded up after the slow winding.
When the pipe is formed by the winding method, the mold release agent is first coated on the core. The demoulding agent can be made of Vaseline, bitumen, and paraffin by mixing and cooling by mass than 1.5:1:1. When used, the use of turpentine is diluted into a paste. The core coated with a demoulding agent must be coated with a section of adhesive material as the substrate and then put between the two supporting axes and put down the roller to press the core. The adhesive material around the winding machine is straightened so that it is connected to one end of the film and then slowly winding, and it can speed up after normal.
In the winding, adhesive material by the tension roller and guide roller into the front bracket roller has heating, heating and then stick around to the tube core wrap film, tension roll to adhesive material winding to a certain tension, one hand is winding closely, on the other hand can be used by frictional force the tube core rotation. The temperature of the front support roller must be strictly controlled, and the resin is easy to flow when the temperature is too high. It can not guarantee good adhesion when it is too low.
When coiling the novolac tube, it can be controlled at 80-120 C. When the winding to the specified thickness, cut the tape, the tube will be rolled together with the tube core from the reel off, send such as oven curing. When making the coiling tube of phenolic aldehyde, if the wall thickness is less than 6mm, it can be put into the oven at 80-100 C, and then heated to 170 C to solidify it 2h. Cured completely, removed from the oven, cooled naturally at room temperature, and finally removed the pipe from the core.
The process of making rod is basically the same as that of pipe. The difference is that the early use of thinner Mandrel winding, winding can be pulled out after normal mandrel rolling can be molded laminated tubes and rods of the machine can be made into various mechanical parts (such as collar, sleeve gasket, etc.), but also can be directly used as insulation casing, chemical infusion pipe etc.