Hdpe Steel Wire Mesh Reinforced Polyethylene Skeleton Pipe

HDPE steel wire mesh reinforced polyethylene skeleton pipe (hereinafter referred to as “HDPE composite pipe”) is widely used in the fields of municipal engineering, petrochemical industry, mine transportation and so on by virtue of its high strength, corrosion resistance and long service life and other characteristics. The sealing machine as an indispensable key equipment in the pipeline construction, its performance directly affects the sealing quality of the pipeline and the efficiency of the project. For the special structure of HDPE composite pipe, our company has developed a special sealing machine for HDPE steel wire mesh reinforced polyethylene skeleton pipe, which is designed with intelligence and high efficiency as the core to provide an integrated solution for industry users.

As the core equipment for steel wire mesh skeleton composite pipe, HDPE steel wire mesh reinforced polyethylene skeleton pipe sealing machine redefines the standard of pipe sealing process by virtue of advanced PLC intelligent control system and dual-mode operation design. This equipment is specially developed to cope with complex working conditions, integrating automation, high precision and strong compatibility, which is the ideal choice for municipal engineering, industrial transportation and other fields. It can be adapted to HDPE composite pipes with different diameters (DN50-DN1200) and wall thicknesses, and supports a variety of pipe-end processing modes, such as flat and beveled. Equipped with intelligent adjustment module, one key to switch parameters, easy to deal with complex construction environment.

Installation and commissioning and maintenance

(1) The center height of the sealing machine wheels and put the pipe rack to put flat, in normal operation such as encountering emergency fault or problem, first press the reset button to make the exit home position, and then press the total stop button.

Barrier or problem, first press the reset button, so that the exit origin, and then press the total stop button.

(2) Pipe table inside and outside the cutting machine with sawdust timely deal with clean, keep the mold mouth mold, core mold, sealing mold clean, to the pipe table inside and outside the cutting machine with sawdust timely deal with clean.

mold, sealing mold clean, clean and tidy to the machine table, processing method: blowing with compressed air, the

The machine body is equipped with air gun (timed cleaning), should clean up the motor and wire rod components to ensure reliable

Work. (3) All pneumatic, slider, guide rail movement are required to play on a regular basis lubrication grease (12 hours?), to ensure that the lubrication point is always lubricated.

(12 hours? times), to ensure that the lubrication point is always lubricated.

Sealing process and technical specifications

Pre-treatment stage

Port grinding: use grinding wheel blade or scraper to remove the oxidized layer on the inner and outer surface of the pipe end, the grinding width should be uniform (0.1-0.2mm is recommended), to ensure that the tip of the steel wire is completely embedded in the plastic layer, to avoid exposure to oxidation;

Surface cleaning: use alcohol or special cleaner to thoroughly remove the welding area sediment, oil stains, focusing on the treatment of electrofusion joint jack internal impurities;

Positioning of the pipe: install the appropriate sealing ring and snap ring to ensure that the end face of the pipe is perpendicular to the axis, to avoid skewing leading to uneven fusion.

Fusion and connection

Thermal fusion temperature control: use electrofusion fittings (built-in resistance wire) or special heating devices to control the temperature in the HDPE melting range (220-260℃), and evenly heat the inner and outer plastic and steel wire skeleton through the resistance wire;

Electrofusion operation: Insert electrofusion fittings into the pipe end, fix and apply axial pressure through the righting device, observe the extrusion of melt to avoid overheating leading to wire debonding.

Press-fit shaping

Pressure control: Hydraulic device is used to maintain a constant pressure of 0.15-0.3MPa to press the sealing ring until the molten plastic is cooled and shaped to form a continuous sealing layer;

Mold Forming: Automated equipment (e.g., MJF Extrusion Sealing System) accurately controls the thickness and uniformity of the plastic-coated wire mesh by moving the mold in a radial direction.

Cooling and Inspection

Natural cooling: external interference is strictly prohibited during the cooling process, and the fixture is removed after the temperature has dropped to room temperature;

Quality inspection: visual inspection of the sealing area for cracks and air holes, verification of the sealing by air tightness test, and X-ray inspection of the internal structure if necessary.

Key Technical Points

Temperature control and material matching

The heating temperature should be precisely matched to the HDPE raw material batch to avoid cracking of the sealing layer due to the difference in thermal expansion coefficient;

Electrofusion fittings need to be tested in advance for resistance wire conductivity to ensure that there is no oxidation or poor contact in the circuit system.

Anti-oxidation design

The sealing ring shall completely cover the steel wire mesh, and any tiny gap will lead to oxidation and corrosion of the steel wire, reducing the life of the pipe;

Adoption of high-performance HDPE modified bonding resin to enhance the interfacial bonding between plastic and steel wire.

Automation Advantage

Mechanical press-fit is 3-5 times more efficient than traditional manual work, and the pressure and temperature parameters are more stable;

Integrated equipment can synchronize the hot melt, press-fit and cooling processes, reducing human error1.