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  4. PVC steel wire transparent hose forming ...

PVC steel wire transparent hose forming process and formula

PVC steel wire transparent hose forming process and formula

PVC transparent plastic hose, PVC plastic hose, PVC steel wire transparent hose have the characteristics of high pressure resistance, tensile resistance, oil resistance, acid and alkali resistance and good transparency. PVC steel wire transparent hose is widely used in automobiles, ships, machinery, Petroleum and chemical industries can pump a variety of liquids and gases.

1

PVC steel wire transparent hose forming principle

The PVC plastic hose refers to a hose that uses PVC, glass fiber, metal wire and other looped fabric as the intermediate layer of the hose to play a role of reinforcement. The key to its forming is the winding of the mesh, which can be divided into in-mold winding and out-of-mold winding according to the fabric winding method. At present, most of the foreign countries adopt the outside-mold winding weaving method, which can produce the ideal PVC steel wire transparent hose.

2

Reference formula of PVC steel wire transparent hose

PVC 50, DOP 10, DOA 10, chlorinated paraffin 15, organic tin 0.6, PE wax 0.2, stearic acid 0.1

3

Process flow of PVC steel wire transparent hose

Ingredients → Mixed granulation → No. I extruder extruded inner wall tube blank → Cooling → Winding → No. II extruder extruded outer layer → cooling → traction → light inspection → coiling → packaging → finished product


4

Design of PVC steel wire transparent hose forming equipment and device

The pvc steel wire transparent hose forming equipment is composed of main extruder, auxiliary extruder, machine head, air cooling device, net weaving device, traction, light inspection and winding device.

Main and auxiliary extruder

The specifications of pvc steel wire transparent hose generally range from Φl2-Φ50mm, so choose Φ45mm, the extruder can be used, extruding random screw length to diameter ratio L / D = 20, four-stage heating, stepless speed regulation, two machine center The height is l00mm.

Machine head (die head)

The design of the machine head depends on the size of the PVC steel wire transparent hose. Whether the design is reasonable or not directly affects the forming quality of the pipe.

Winding device

It is composed of left and right weft weaving shuttles and fixed shafts. According to the height of the enhancement index, one or more sets of weaving devices can be designed. Each group of weaving devices can also be designed with multiple left and right weft threads and multiple radial threads. Both ends are equipped with left and right rotary shuttles respectively. Each rotary shuttle can be equipped with 1 to 5 bobbin thread reels. When the drive shaft drives the left and right rotary shuttles to rotate, the bobbin thread is wound around the continuously extruded pvc wire On the tube blank of the inner wall of the transparent hose, the rotating speed of the rotary shuttle and the amount of bobbin thread are determined according to the extrusion speed of the tube blank and the density of the required mesh, generally there are l-2 on each rotary extrusion A core roll can play a significant enhancement effect. The warp thread is penetrated by the warp hole on the fixed shaft without rotation.

Cooling air ring

PVC steel wire transparent hose is often shaped by water cooling, but considering that the tube blank coming out of the No. 1 die will immediately enter the No. II die to cover the outer layer of plastic, so the tube blank extruded by the No. I die cannot Cooling with water and cooling with air ring, otherwise, the moisture on the tube blank will produce bubbles and affect the quality of the product. For air ring cooling, the air volume is controlled at about Q = 1500m3 / hr, and a double-lip air ring is used.

Traction device

The traction device is the same as that of the ordinary hose. In order to ensure the regularity of the PVC wire transparent hose mesh fabric, the traction and the machine can be linked with the winding device.

Optical inspection and winding device

The light picking box is used to check the uniformity of the wall thickness of the PVC steel wire transparent hose and the degree of mesh regulation. A 60-watt fluorescent tube can be used in the glass box. The winding device uses a friction clutch to keep the winding. tension.

The PVC steel wire transparent hose produced by this method has stable and reliable quality, and the production cost is greatly reduced. The price is only about 1/3 to 1/2 of the rubber tube, and it is transparent, oil resistant, flame retardant, weight, life, etc. The performance is much better than rubber tube. Therefore, it has promotion value in actual production.

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