阅读说明：本技术 一种hdpe双壁波纹管的制备方法 (Preparation method of HDPE double-wall corrugated pipe ) 是由 何华丰 俞乃林 寿武勇 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种HDPE双壁波纹管的制备方法,包括以下步骤：先筛选HDPE双壁波纹管原料,然后对HDPE双壁波纹管原料进行处理；将处理后的HDPE双壁波纹管原料送入挤塑机中加热塑化,并且挤出成型。本发明所述的一种HDPE双壁波纹管的制备方法,确定了挤出机的最佳挤出压力,在HDPE双壁波纹管挤出过程中适当的加压,从而使得HDPE双壁波纹管原料分子链更加的紧密,增加物料的黏度,从而提高挤出的HDPE双壁波纹管的质量,提高HDPE双壁波纹管的力学性能,能够恒定的降低生产的HDPE双壁波纹管温度,减小HDPE双壁波纹管的降温速度,从而减小温差对HDPE双壁波纹管的影响,提高生产的HDPE双壁波纹管的质量,带来更好的使用前景。(The invention discloses a preparation method of HDPE double-wall corrugated pipe, which comprises the following steps: firstly, screening a HDPE double-wall corrugated pipe raw material, and then processing the HDPE double-wall corrugated pipe raw material; feeding the treated HDPE double-wall corrugated pipe raw material into an extruding machine for heating and plasticizing, and extruding and molding. The preparation method of the HDPE double-wall corrugated pipe determines the optimal extrusion pressure of the extruder, and properly pressurizes the HDPE double-wall corrugated pipe in the extrusion process, so that the molecular chains of raw materials of the HDPE double-wall corrugated pipe are tighter, the viscosity of materials is increased, the quality of the extruded HDPE double-wall corrugated pipe is improved, the mechanical property of the HDPE double-wall corrugated pipe is improved, the temperature of the produced HDPE double-wall corrugated pipe can be constantly reduced, the cooling speed of the HDPE double-wall corrugated pipe is reduced, the influence of temperature difference on the HDPE double-wall corrugated pipe is reduced, the quality of the produced HDPE double-wall corrugated pipe is improved, and better use prospects are brought.)

1. A preparation method of HDPE double-wall corrugated pipe is characterized by comprising the following steps: the method comprises the following steps:

firstly, screening a HDPE double-wall corrugated pipe raw material, and then processing the HDPE double-wall corrugated pipe raw material;

feeding the processed HDPE double-wall corrugated pipe raw material into an extruding machine for heating and plasticizing, and performing extrusion molding to obtain a corrugated pipe blank;

sending the corrugated pipe blank after extrusion molding into a corrugated pipe molding machine for molding and flaring to obtain a rough corrugated pipe;

sending the rough corrugated pipe into cooling equipment for spray cooling, and then airing the rough corrugated pipe;

and (4) sending the dried rough corrugated pipe into an ink-jet printer for code spraying, and then cutting to obtain the HDPE double-wall corrugated pipe.

2. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: the HDPE double-wall corrugated pipe comprises polyethylene, reinforced modified master batch, pigment and defoaming agent.

3. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: the HDPE double-wall corrugated pipe comprises the following raw material processing steps:

(1) stirring with a stirrer at 30-40 deg.C at a stirring speed of 30-40r/min for 10-15 min;

(2) and conveying the uniformly stirred raw materials into a drying device, and drying by hot air at the drying temperature of 72-76 ℃ for 120-150 min.

4. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: the HDPE double-wall corrugated pipe raw material heating and plasticizing process comprises a low-temperature heating stage, a constant-temperature compression stage and a raw material homogenizing stage, wherein the temperature of the low-temperature heating stage is 85-95 ℃, the heating time is 10-20min, the temperature of the constant-temperature compression stage is 120-180 ℃, the heating time is 5-10min, the temperature of the raw material homogenizing stage is 130-150 ℃, and the heating time is 10-20 min.

5. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: and during plasticizing, two groups of extruding machines are adopted, materials plasticized by the two groups of extruding machines are conveyed to an extruding mould to respectively extrude the outer wall and the inner wall of the pipe of the HDPE double-wall corrugated pipe, the temperature of a machine head of the extruding machine is 175-185 ℃ during extruding, and the extruding pressure is 25-29 MPa.

6. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: the rough corrugated pipe adopts constant temperature cooling when in spray cooling, firstly adopts a high-pressure atomizer to spray water mist when in cooling, adopts warm water with the temperature of 55 ℃ at the initial stage of spraying, changes water after 1-2min, changes water for 3-4 times, and reduces the water temperature by 8-10 ℃ every time of changing water.

7. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: the air drying is assisted by a fan, and the surface temperature of the rough corrugated pipe after air drying is 20-30 ℃.

8. The method of claim 1, wherein the HDPE double-wall corrugated pipe is prepared by the following steps: and cutting the rough corrugated pipe by using an electric saw, and polishing the surface of the rough corrugated pipe after cutting by using a grinding wheel.

Technical Field

The invention relates to the field of HDPE double-wall corrugated pipe processing, in particular to a preparation method of an HDPE double-wall corrugated pipe.

Background

With the development of society, plastic pipelines are steadily developing, PE pipes, PP-R pipes and UPVC pipes all occupy a place, wherein the strong development of the PE pipes is most attractive, the PE pipes are widely used, one common PE pipe is an HDPE double-wall corrugated pipe, the demand of people for the HDPE double-wall corrugated pipe is continuously increased along with the development of the building industry, and the preparation method of the HDPE double-wall corrugated pipe is invented for the convenience of people for producing the HDPE double-wall corrugated pipe;

the existing HDPE double-wall corrugated pipe preparation method has certain disadvantages when in use, firstly, the existing HDPE double-wall corrugated pipe preparation method adopts low-pressure extrusion during processing, the double-wall corrugated pipe is produced quickly but has poor quality, secondly, the existing HDPE double-wall corrugated pipe preparation method adopts one-time cooling in a cooling stage, the cold and hot changes of the double-wall corrugated pipe are quick, the double-wall corrugated pipe is locally broken, the quality of the double-wall corrugated pipe can be influenced, and the use requirements of people can not be met.

Disclosure of Invention

The invention mainly aims to provide a preparation method of HDPE double-wall corrugated pipe, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a preparation method of HDPE double-wall corrugated pipe comprises the following steps:

firstly, screening a HDPE double-wall corrugated pipe raw material, and then processing the HDPE double-wall corrugated pipe raw material;

feeding the processed HDPE double-wall corrugated pipe raw material into an extruding machine for heating and plasticizing, and performing extrusion molding to obtain a corrugated pipe blank;

sending the corrugated pipe blank after extrusion molding into a corrugated pipe molding machine for molding and flaring to obtain a rough corrugated pipe;

sending the rough corrugated pipe into cooling equipment for spray cooling, and then airing the rough corrugated pipe;

and (4) sending the dried rough corrugated pipe into an ink-jet printer for code spraying, and then cutting to obtain the HDPE double-wall corrugated pipe.

Preferably, the HDPE double-wall corrugated pipe raw material comprises polyethylene, reinforcing modified master batch, pigment and defoaming agent.

Preferably, the HDPE double-wall corrugated pipe comprises the following raw material processing steps:

(1) stirring with a stirrer at 30-40 deg.C at a stirring speed of 30-40r/min for 10-15 min;

(2) and conveying the uniformly stirred raw materials into a drying device, and drying by hot air at the drying temperature of 72-76 ℃ for 120-150 min.

Preferably, the HDPE double-wall corrugated pipe raw material heating and plasticizing process comprises a low-temperature heating stage, a constant-temperature compression stage and a raw material homogenizing stage, wherein the temperature of the low-temperature heating stage is 85-95 ℃, the heating time is 10-20min, the temperature of the constant-temperature compression stage is 120-180 ℃, the heating time is 5-10min, the temperature of the raw material homogenizing stage is 130-150 ℃, and the heating time is 10-20 min.

Preferably, two groups of extruding machines are adopted during plasticizing, materials plasticized by the two groups of extruding machines are conveyed to an extruding mould to respectively extrude the outer wall and the inner wall of the pipe of the HDPE double-wall corrugated pipe, the temperature of the head of the extruding machine is 175-185 ℃ during extruding, and the extruding pressure is 25-29 MPa.

Preferably, the rough corrugated pipe is cooled at constant temperature when being sprayed, water mist is sprayed by a high-pressure atomizing nozzle when being cooled, warm water with the temperature of 55 ℃ is selected at the initial spraying stage, water is changed for 3-4 times after being sprayed for 1-2min, and the temperature of the water is reduced by 8-10 ℃ each time.

Preferably, the air drying is assisted by a fan, and the surface temperature of the dried rough corrugated pipe is 20-30 ℃.

Preferably, the rough corrugated pipe is cut by an electric saw, and the surface of the rough corrugated pipe after cutting is polished by a grinding wheel.

Compared with the prior art, the preparation method of the HDPE double-wall corrugated pipe has the following beneficial effects:

1. the optimal extrusion pressure of the extruder is determined, and the HDPE double-wall corrugated pipe is properly pressurized in the extrusion process, so that the molecular chains of the raw materials of the HDPE double-wall corrugated pipe are tighter, the viscosity of the materials is increased, the quality of the extruded HDPE double-wall corrugated pipe is improved, and the mechanical property of the HDPE double-wall corrugated pipe is improved;

2. the HDPE double-wall corrugated pipe is characterized in that the HDPE double-wall corrugated pipe is connected with the water tank through a pipeline, and the water tank is connected with the water tank through a pipeline.

Drawings

FIG. 1 is a flow chart of the overall structure of a method for manufacturing HDPE double-wall corrugated pipe according to the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.