CN104972666A - Krah pipe continuous production process - Google Patents

Abstract

The invention discloses a krah pipe continuous production process. The process comprises the following production steps that 1, materials are mixed and dried, and the raw materials required for producing krah pipes are added into a mixing unit according to a specified ratio, mixed evenly and dried, wherein the raw materials comprise, by mass, 85-96% of HDPE, 0-7% LDPE and 4-8% of color masterbatches, and the drying time of the raw materials ranges from 60 min to 120 min; 2, PE materials are extruded, the mixed and dried materials are conveyed to an extruder hopper, pass through an extruder charging barrel, are subjected to screw heating, shearing and plasticizing and enter a plate die and a pipe die respectively, and then plates and pipes are extruded, wherein the temperature of a machine body ranges from 18 DEG C to 210 DEG C, and the temperatures of the dies range from 190 DEG C to 220 DEG C. The krah pipes are formed through continuous production equipment according to the steel belt pipe winding principle, the polyethylene raw materials are heated and molten through a main machine and then extruded into flat belts and the round pipes (including PP pipes), the krah pipes are formed by continuously winding the flat belts around the round pipes and cooled in a water cooling or air cooling mode.

Description

A kind of carat pipe continuous production processes

Technical field

The present invention relates to a carat pipe production field, specifically belong to a kind of carat pipe continuous production processes.

Background technology

Type B HDPE winding structure pipe, be called for short carat pipe, be be main raw material(s) with high-density polyethylene resin, adopting hot winding shaping process, is that supporting construction makes the special construction wall tube material with higher critical external compressive resistance ability with polypropylene (PP) single-wall corrugated pipe.It is compared with traditional steel pipe or pipe of cement, performance characteristics mainly contains: 1, hot Wrapping formed welded seam quality is high, from the flat material strip being in molten condition and the O moulding mixture band of extruding machine die extrusion, be wrapped in uniformly on the drum die of heating by preposition, ensure that structured wall popes welded side seam quality; 2, installation capability is excellent, and pipeline connects employing at the pre-buried electric fuse of bellmouth with material socket joint electric smelting interconnection technique, and quality of connection is high; 3, good pliability, high density polyethylene (HDPE) winding structure wall pipe macroscopically has good pliability, and local pipeline section has very strong rigidity and overall critical external compressive resistance ability, have use under overweight load road surface time, current safety can be ensured; 4, HDPE recovery capable of circulation uses, and belongs to environmental type product, the main raw material(s) high density poly propylene of winding structure pipe, without any toxicity, also raw without any dye produce in process of production, and useless pipeline can 100% recycling; 5, guarantee 50 years anticorrosive, ageing-resistant, service life, high density polyethylene (HDPE) has extremely strong chemical resistance corrosion and the ability of erosion; 6, low, the carrying capacity of inside pipe wall roughness is large, is about 0.010 around structured wall popes product inwall roughness N, and when therefore carrying fluid, specific frictional resistance is little, relatively with the pipe of cement of internal diameter, under equal service condition carrying capacity comparatively pipe of cement can increase substantially.

The technique of this carat pipe of current production, technical process poor continuity, yields poorly, and processing cost is high.

Summary of the invention

The object of this invention is to provide a kind of carat pipe continuous production processes, thus solve Problems existing in background technology.

Technical scheme of the present invention is as follows:

A kind of carat pipe continuous production processes, includes following production stage:

A, batch mixing, drying: the raw material produced needed for carat pipe is added batch mixing unit by regulation proportioning, mix and drying, wherein each material quality percentage is 85-96%HDPE, 0-7%LDPE, 4-8% Masterbatch, the raw material drying time: 60-120min;

B, PE material is extruded: the mixed ingredients through combination drying is transported to extruder hopper, enters plate, materials in the tube mould respectively, extrude plate, materials in the tube, wherein body temperature: 180-210 DEG C after extruder barrel, screw rod heating, shearing plasticizing; Mold temperature: 190-220 DEG C;

C, coated: bellows passes from materials in the tube mold center, is coated on bellows outside with materials in the tube in molten condition, form ribs, wherein molten temperature: 19-220 DEG C, fusion pressure: about 50MPa;

D, once winding: plate is spiral winding on roll shaft, and form tubular base plate in the molten state;

E, secondary are wound around: ribs is wrapped in two plate binding sites of base plate, with bottom plate combined bonding, form carat pipe body;

F, roll shaft draw: carat pipe body moves forward under the draw of the roll shaft circumferentially rotated;

G, cooling: Wrapping formed carat pipe, in distraction procedure, carries out air-cooled or water-cooled, also can naturally cool under guarantee cooling effect prerequisite;

H, cutting: fixed length cutting.

The present invention has following beneficial effect:

It is shaping that the present invention uses continuous production device to adopt steel-belt-pipe to be wound around principle, polyethylene raw material are extruded flat rubber belting, pipe (inside having PP to manage) by main frame heating melting, continuous-winding forming on Wound Dies, its cooling adopts water-cooled or air-cooledly to combine, the product produced does not need gas-firing, reduces cost, can continuous seepage operation, output is high, reliable product quality.

Detailed description of the invention

A kind of carat pipe continuous production processes, includes following production stage:

A, batch mixing, drying: the raw material produced needed for carat pipe is added batch mixing unit by regulation proportioning, mix and drying, wherein each material quality percentage is 85-96%HDPE, 0-7%LDPE, 4-8% Masterbatch, the raw material drying time: 60-120min;

B, PE material is extruded: the mixed ingredients through combination drying is transported to extruder hopper, enters plate, materials in the tube mould respectively, extrude plate, materials in the tube, wherein body temperature: 180-210 DEG C after extruder barrel, screw rod heating, shearing plasticizing; Mold temperature: 190-220 DEG C;

C, coated: bellows passes from materials in the tube mold center, is coated on bellows outside with materials in the tube in molten condition, form ribs, wherein molten temperature: 19-220 DEG C, fusion pressure: about 50MPa;

D, once winding: plate is spiral winding on roll shaft, and form tubular base plate in the molten state;

E, secondary are wound around: ribs is wrapped in two plate binding sites of base plate, with bottom plate combined bonding, form carat pipe body;

F, roll shaft draw: carat pipe body moves forward under the draw of the roll shaft circumferentially rotated;

G, cooling: Wrapping formed carat pipe, in distraction procedure, carries out air-cooled or water-cooled, also can naturally cool under guarantee cooling effect prerequisite;

H, cutting: fixed length cutting.

Claims (1)

1. a carat pipe continuous production processes, is characterized in that, includes following production stage:

A, batch mixing, drying: the raw material produced needed for carat pipe is added batch mixing unit by regulation proportioning, mix and drying, wherein each material quality percentage is 85-96%HDPE, 0-7%LDPE, 4-8% Masterbatch, the raw material drying time: 60-120min;

B, PE material is extruded: the mixed ingredients through combination drying is transported to extruder hopper, enters plate, materials in the tube mould respectively, extrude plate, materials in the tube, wherein body temperature: 180-210 DEG C after extruder barrel, screw rod heating, shearing plasticizing; Mold temperature: 190-220 DEG C;

C, coated: bellows passes from materials in the tube mold center, is coated on bellows outside with materials in the tube in molten condition, form ribs, wherein molten temperature: 19-220 DEG C, fusion pressure: about 50MPa;

D, once winding: plate is spiral winding on roll shaft, and form tubular base plate in the molten state;

E, secondary are wound around: ribs is wrapped in two plate binding sites of base plate, with bottom plate combined bonding, form carat pipe body;

F, roll shaft draw: carat pipe body moves forward under the draw of the roll shaft circumferentially rotated;

G, cooling: Wrapping formed carat pipe, in distraction procedure, carries out air-cooled or water-cooled, also can naturally cool under guarantee cooling effect prerequisite;

H, cutting: fixed length cutting.