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HDPE rib tube coating die and HDPE rib tube forming method

A mold and coating technology, applied in the direction of coating, can solve the problems of different thickness of outer coating PE, affecting the rigidity of pipe ring, hidden danger of pipe performance, etc., to achieve good appearance and solve the effect of flat collapse of ribbed pipe

Inactive Publication Date: 2018-02-02
HESHAN LESSO IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the carat tube ribbed tube is wound on a special mold, there is a certain gap between the PE material covering the outer surface of the PP single-wall corrugated tube, and it is easy to be squeezed by the limit wheel used to adjust the pitch and direction of the carat tube ribbed tube. The thickness of the PE coating on the outer layer is different or wrinkled, which makes the PP single-wall corrugated pipe eccentric and winds around the ribbed pipe behind the mold to generate air bubbles, which not only affects the appearance of the carat pipe, but also affects the ring stiffness of the pipe, and has a negative impact on the performance of the pipe. Certain hidden dangers

Method used

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  • HDPE rib tube coating die and HDPE rib tube forming method

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Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 As shown, a HDPE ribbed pipe coating mold includes a PP single-wall corrugated pipe inlet cavity 1, a PE coating layer extrusion channel 2, and PP single-wall corrugated pipe inlets are provided at both ends of the PP single-wall corrugated pipe inlet cavity. Outlet (not marked in the figure), the PP single-wall corrugated pipe moves through the inlet and outlet of the PP single-wall corrugated pipe at both ends under the drive of the external winding mold, and the PP single-wall corrugated pipe moves in the inlet cavity of the PP single-wall corrugated pipe. When the PP single-wall corrugated pipe moves into the lumen, the inlet and outlet of the PP single-wall corrugated pipe are sealed at both ends so that the PP single-wall corrugated pipe enters the lumen to form a sealed structure; On the outer wall of the PP single-wall corrugated pipe in the inlet cavity of the PP single-wall corrugated pipe, the discharge port of the extrusion channel 2 of the PE ...

Embodiment 2

[0029] A kind of HDPE rib pipe forming method, comprises the following steps:

[0030] S1: Turn on the external vacuum equipment to pump the PP single-wall bellows into the air in the lumen 1;

[0031] S2: Simultaneously open the external winding die 8 and the PE coating layer extrusion equipment, so that the PP single-wall corrugated pipe is pulled out from the inlet and outlet of the PP single-wall corrugated pipe and covered with a layer of PE layer at the same time;

[0032] S3: Adjust the control valve 7 to control the external vacuum equipment to adjust the bonding degree between the cladding layer PE and the PP single-wall corrugated pipe.

[0033] Among them, the PP single-wall corrugated pipe moves horizontally along its axis.

[0034] The same or similar reference numerals correspond to the same or similar components;

[0035] The positional relationship described in the drawings is only for illustrative purposes and cannot be construed as a limitation to this pate...

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Abstract

The invention provides an HDPE rib tube coating die and an HDPE rib tube forming method. By utilizing the die, when a PP single-wall corrugated tube penetrates through the rib tube coating die througha vacuum pressing plate and a silica gel sheet, PE is extruded to coat an outer surface of the PP single-wall corrugated tube, meanwhile, an external vacuumizing device is started, air in a cavity ofthe rib tube coating die is sucked away through a vacuum pipeline, so that partial air in the gap between the coating PE and the PP single-wall corrugated tube is sucked away, and therefore the outerPE is tightly attached to and coats the outer surface of the PP single-wall corrugated tube, and a coating layer is formed. According to the HDPE rib tube coating die and the HDPE rib tube forming method, roundness, ring stiffness and appearance of a produced rib tube are better than those of a traditionally-produced rib tube, and the problems of flat collapse of the rib tube, too many bubbles ofthe rib tube, low ring stiffness and unstable performance are solved.

Description

technical field [0001] The invention relates to the field of forming HDPE pipes, in particular to an HDPE ribbed tube covering mold and a ribbed tube forming method thereof. Background technique [0002] Since the HDPE reinforced winding structure wall pipe (Type B) (hereinafter referred to as the carat pipe) is formed by thermal winding, the quality of the weld seam is high and the ring rigidity is high. The road surface will not collapse due to fluid leakage during operation. Carat tubes can effectively overcome poor geological conditions and are suitable for the construction of sponge cities, so they have been widely used in recent years. The high rigidity performance of the carat tube is mainly provided by the tube body structure formed by the composite rib tube and the seamless inner wall. Firstly, the hot PE sheet is wound on a special mold to form the PE inner layer of the seamless carat tube. At the same time, the PP single-wall corrugated pipe is sent into the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/02B29C47/08B29C47/20B29C48/32
CPCB29C48/14B29C48/151B29C48/25B29C48/30B29C48/32
Inventor 周俊迎
Owner HESHAN LESSO IND DEV