Winding technology of spiral wound pipe machine

The winding process of a spiral wound pipe machine is to wind the continuous fiber (or cloth tape, prepreg yarn) soaked with resin liquid onto the mandrel according to certain rules, then solidify to obtain the product. The winding process of the spiral wound pipe machine can be divided into dry winding, wet winding, and semi-dry winding according to the physical and chemical state of the resin matrix.

Here is the content list:

l Dry winding

l Wet winding

l Semi-dry winding

 Dry winding

Dry winding is the process of a spiral wound pipe machine, which adopts prepreg yarn or tape treated by prepreg. It is heated and softened to viscous flow state on the winding machine of spiral wound pipe machine, and then wound on the mandrel. Because prepreg yarn (or tape) is a professional production, it can strictly control the resin content (accurate to 2%) and the quality of prepreg yarn. Therefore, the dry winding can accurately control the product quality. The most important feature of the dry winding process is high production efficiency. The winding speed of the spiral wound pipe machine can reach 100-200m / min. the winding machine of the spiral wound pipe machine is clean, with good labor hygiene conditions and high product quality. The price of winding equipment of spiral wound pipe machine is high, so it needs to increase the prepreg manufacturing equipment, so the investment is large. In addition, the interlaminar shear strength of dry winding products of spiral wound pipe machines is low.

Wet winding

The wet winding of the spiral wound pipe machine is that the fiber bundle (yarn tape) is dipped with glue, and the spiral wound pipe machine is directly wound on the mandrel under tension control. The advantages of spiral wound pipe machine wet winding are as follows: ① The cost is 40% lower than that of spiral wound pipe machine dry winding; ② The product of spiral wound pipe machine has good air tightness because the winding tension of spiral wound pipe machine makes the excess resin liquid extrude the bubble and fill the gap; ③ The fiber arrangement of spiral wound pipe machine is parallel; ④ When the spiral wound pipe machine is wet wound, the resin glue on the fiber can reduce the fiber wear; ⑤ The production efficiency of spiral wound pipe machine is high (up to 200m / min).

Semi-dry winding

The semi-dry winding of the spiral wound pipe machine is to add a set of drying equipment of the spiral wound pipe machine on the way to the mandrel after the fiber is dipped, to remove the solvent in the dipped yarn. Compared with the dry winding, the semi-dry winding of the spiral wound pipe machine saves the prepreg process and equipment; Compared with the wet method, the content of bubbles in the product can be reduced.

Among the three winding methods of spiral wound pipe machine, the wet winding is the most common; Spiral wound pipe machine is only used in high-performance, high-precision cutting-edge technology.

Eagle Machinery Co., Ltd's Winding technology of spiral wound pipe machine has mature production technology. If you have any questions about the spiral wound pipe machine, you can contact us immediately.