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Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe

A technology of double-wall corrugated pipe and rigid polyvinyl chloride, which is applied in the field of manufacturing rigid polyvinyl chloride double-wall corrugated pipe, can solve the problems of inability to produce large diameters, achieve qualified quality and improve production efficiency

Active Publication Date: 2005-03-02
杭州波达塑料科技股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the hard polyvinyl chloride double-wall corrugated pipe with a large diameter, especially an outer diameter of 800 mm, cannot be produced at present, and provides a production process for a large-diameter rigid polyvinyl chloride double-wall corrugated pipe, so that it can It has the characteristics of continuous production process, high production efficiency, no ribs on the double-wall corrugated pipe, and reliable product quality.

Method used

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  • Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe
  • Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe
  • Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe

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Embodiment 1

[0025] Embodiment 1. The production process of the large-caliber rigid polyvinyl chloride double-wall corrugated pipe in this embodiment contains the following steps in sequence:

[0026] 1) Raw materials: the unit of each component is parts by weight PVC resin (i.e. polyvinyl chloride resin) 100

[0027] Composite stabilizer 5~7

[0028] Stearic acid 0.9~1.5

[0029] PE wax (ie polyethylene wax) 0.4~1.0

[0030] Chlorinated polyethylene 4~6

[0031] Calcium carbonate 5~10

[0032] In the above-mentioned preparation materials, the high-performance composite stabilizer is the SMR50354 composite stabilizer produced by the German Bear brand company purchased from the domestic market, which can be used as a stable distribution system for materials; calcium carbonate is a kind of superfine activated PVC Fillers are used to ensure ...

Embodiment 2

[0038] Embodiment 2. The production process of the large-diameter rigid polyvinyl chloride double-wall corrugated pipe of this embodiment is different from that of Embodiment 1 in that: in the process of preparing materials, in addition to strict weighing, each group of ingredients must be weighed. Reweighing monitoring and zero point calibration of measuring instruments to ensure accurate measurement.

[0039] The twin-screw extruder in this embodiment adopts the most advanced SJSZ-95 / 191 conical twin-screw extruder in China, and its extrusion capacity per hour can reach 11000kg, which can effectively ensure Sufficient plasticization of materials and material supply required for continuous molding of large-diameter corrugated pipes.

[0040] The extrusion die head in this embodiment is made of forged blank made of high-quality alloy steel, which is subjected to full numerical control processing after quenching and tempering heat treatment. Because in the production process o...

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Abstract

The production process can produce double wall corrugated pipe of hard polyvinyl chloride and in the caliber up to 800 mm and the corrugated pipe is used for conveying liquid or solid material and protecting under ground wires. The production process includes the following steps: preparing materials including PVC resin, composite stabilizer, stearic acid, PE wax, chlorinated polyethylene and calcium carbonate; kneading the materials in a high speed kneading machine for 12-16 min, stirring in low speed cold mixer at 115-125 deg.c, extruding in a double screw extruder at 90-210 deg.c, setting and drawing in a blowing and sucking molding formation machine, cutting and flaring.

Description

technical field [0001] The invention relates to a method for manufacturing rigid polyvinyl chloride double-wall corrugated pipes for conveying solid and liquid materials or for sheathing various underground pre-embedded lines, especially a large-diameter corrugated pipe with an outer diameter of 800mm. The production process of rigid polyvinyl chloride double-wall corrugated pipe. Background technique [0002] A rigid polyvinyl chloride double-wall corrugated pipe, its structure can be seen from its main sectional view figure 1 and its enlarged graph of node I figure 2 As can be seen in the figure, its tube wall includes an inner wall 4b and an outer wall 4a that is connected with the inner wall and bulges outward. At present, because of its light texture, high rigidity and strength, moisture resistance, corrosion resistance, and low manufacturing cost, it is widely used in the transportation of various pre-embedded lines and various solid and liquid materials underground...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/13B29C48/335B29C48/71B29C57/02
CPCB29C48/13B29C48/335B29C48/71
Inventor 吴小波
Owner 杭州波达塑料科技股份有限公司
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