PVC Steel Wire Hose Extrusion Line

The PVC steel wire hose extrusion line is a complete production line used for producing PVC steel wire reinforced spiral winding pipes.

The characteristics of this type of pipe are: smooth inner wall, spiral wound reinforcement ribs on the outer wall, and high-strength steel wire wrapped inside the ribs, greatly improving the ring stiffness and compressive performance of the pipe, while maintaining the advantages of PVC material corrosion resistance and light weight. Widely used in municipal drainage, ventilation, industrial sewage, wire and cable sheath and other fields.

A complete production line usually consists of the following parts:

1. Host/Extrusion System

This is the core of the production line, responsible for melting and plasticizing PVC raw materials and extruding them.

·Single screw extruder: The most common choice is usually a conical twin-screw or parallel twin-screw extruder, which can better process PVC powder, achieve uniform plasticization, and stable output.

·Extruder specifications: Select according to the diameter range of the target pipe, common ones include SJ-65, SJ-80, SJ-100, etc. (numbers represent screw diameter). The larger the diameter, the higher the output, and the larger the diameter of the pipes that can be produced.

2. Winding Forming System

This is the key equipment for producing steel wire winding pipes, with the highest technical content.

·Mold head: A specially designed cross or spiral mold head that extrudes molten PVC into the desired preform (ribbed strip).

·Winding machine:

·Rotating disk: A large, precisely rotatable disc with a molding die mounted on it.

·Forming mold: installed on a rotating disk, used to receive the extruded billet from the mold head, and wrap, weld, cool and shape it into a pipe shape.

·Wire laying device: During the winding process, high-strength steel wire is precisely fed into the billet and wrapped by molten PVC to form reinforcing ribs.

·Roller pressing device: Press the wrapped reinforcement tube together to ensure a secure welding.

3. Traction system

Responsible for steadily pulling the formed pipe out of the winding machine.

·Crawler type tractor: The most common one uses multiple tracks to evenly clamp the outer wall of the pipe, providing stable and strong traction force. The speed is adjustable and synchronized with the extrusion speed.

4. Cutting system

Responsible for cutting continuously produced pipes into predetermined lengths.

·Planetary cutting machine (circular saw type): the most suitable cutting method for large-diameter pipes. The cutting blade not only rotates on its own, but also revolves around the pipe, achieving high-speed and smooth cutting without burrs on the cut.

5. Auxiliary equipment

·Mixing machine (high-speed hot mixer+cold mixer): used to evenly mix and pre plasticize PVC resin, stabilizers, lubricants, fillers, colorants and other raw materials, which is the first step to ensure product quality and is crucial.

·Vacuum feeder: Automatically delivers the mixed materials to the extruder hopper, reducing manual labor and pollution.

·Wire straightening and feeding rack: used to store wire coils and to straighten and tension control the wires during the feeding process.

·Pipe stacking rack/flipping rack: Receive cut finished pipes and automatically dump or remove them from the production line.

·Control system: PLC (Programmable Logic Controller) or industrial computer centrally controls the operation of the entire production line, including all parameters such as temperature, speed, cutting length, etc., which is a standard configuration of modern equipment.

1. Mixing: Mix various raw materials according to the formula in a high-speed mixer, and then cool them to room temperature through a cold mixer for later use.

2. Feeding: The mixed material is fed into the extruder hopper through a vacuum feeding machine.

3. Extrusion: After being heated, sheared, melted and plasticized in the extruder, the material is extruded into a specific cross-section billet through the mold head.

4. Winding and wrapping: The extruded billet is spiral wound on a rotating winding disc, while the steel wire feeding device precisely feeds the steel wire into the billet and wraps it with molten PVC.

5. Compression and cooling: The wrapped tube blank is compressed by a pressing wheel to fuse adjacent spiral layers into one, and is initially cooled and shaped.

6. Traction: The crawler tractor pulls the pipe out of the winding machine at a constant speed.

7. Cutting: When the pipe reaches the set length, the planetary cutting machine automatically performs cutting.

8. Stacking: The cut pipes are automatically collected and stacked by the stacking rack.

If you are considering purchasing equipment, you need to pay attention to the following points:

1. Target product specifications: Clearly specify the minimum and maximum diameters (such as DN200-DN1200mm) and ring stiffness levels (such as SN8, SN10) of the pipes you want to produce. This directly determines the size of extruders and winding machines that need to be purchased.

2. Production requirement: Expected hourly or daily production (in kilograms per hour). The output is directly related to the size and configuration of the extruder.

3. Automation level: Fully automated production lines are expensive, but require fewer people, have high efficiency, and stable product quality. The investment in semi-automatic equipment is small, but it requires more manual operation.

4. Qualification of equipment manufacturer:

·Technical maturity: Evaluate the manufacturer's technical strength and patents, especially the stability of the winding forming system.

·After sales service: It is crucial to ensure timely and reliable installation, debugging, operation training, post maintenance, and spare parts supply.

Summary suggestion: Before investing in PVC steel wire hose extrusion line, it is necessary to conduct market research, clarify product positioning and budget. Then contact 3-5 reputable equipment manufacturers to provide detailed technical solutions and quotations based on your needs, conduct in-depth comparisons and on-site inspections, and ultimately choose the most suitable partner for yourself.

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