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

A double-wall corrugated pipe and rigid PVC technology, which is applied to items with hollow walls, other household appliances, household appliances, etc., can solve the problem of inability to produce large diameters, and achieve the effects of qualified quality and improved production efficiency.

Active Publication Date: 2009-02-04
杭州波达塑料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1, the production process of the large-diameter rigid PVC double-wall corrugated pipe of the present embodiment contains the following steps successively:

[0026] 1) Material preparation: the unit of each component is parts by weight of PVC resin (ie polyvinyl chloride resin) 100

[0027] Compound 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 preparations, the high-performance composite stabilizer is 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. Filler to ensure the dimensional stability of th...

Embodiment 2

[0038] Example 2, the production process of the large-diameter rigid PVC double-wall corrugated pipe in this example is different from Example 1: in the process of material preparation, in addition to strict weighing, every complete set of ingredients must be carried out. Repeat weighing and monitoring, and zero-point calibration of measuring instruments to ensure accurate measurement.

[0039] The twin-screw extruder in this embodiment is an outsourced SJSZ-95 / 191 conical twin-screw extruder, which is currently the most advanced domestically. Sufficient plasticization of materials and supply of materials required for continuous molding of large-diameter bellows.

[0040] The extrusion die in this example is made of high-quality alloy steel for forging the blank, and after quenching and tempering heat treatment, it is processed by full numerical control. Because in the production process of large-diameter rigid PVC double-wall corrugated pipe, the use environment of the extru...

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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 manufacturing method of a rigid polyvinyl chloride double-wall corrugated pipe used for conveying solid and liquid materials or for sheathing various underground embedded lines, in particular to a method for manufacturing a large-diameter pipe with an outer diameter of 800 mm. Production process of rigid PVC double-wall corrugated pipe. Background technique [0002] A rigid polyvinyl chloride double-wall corrugated pipe, its structure can be seen from its main cross-sectional view figure 1 and its node I zoom in figure 2 It can be seen that its pipe wall includes an inner wall 4b and an outer wall 4a which is connected with the inner wall and bulged outward. At present, because of its light texture, high stiffness and strength, and moisture-proof, anti-corrosion, and low manufacturing cost, it is widely used in sheathing underground various embedded lines and the transportation of various solid and liquid materials. With ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/26B29C47/40B29C47/08B29C47/88B29C57/02B29K27/06B29L24/00B29C48/13B29C48/335B29C48/71
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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