1. A preparation process of a high-strength HDFE double-wall corrugated pipe is characterized by comprising the following steps: the method comprises the following steps:

firstly, processing is carried out through molding equipment, injection molding liquid is added into an injection molding box (17), a first electric push rod (3) is started to drive a movable mold (4) to move rightwards, the movable mold is driven to be matched with a fixed mold (2), two rolling inner rings (5) are driven to be clamped together through a sealing clamping piece, the two rolling inner rings (5) are sleeved on the surface of an inner mold (6), and the injection molding is molded;

step two, starting a second electric push rod (16) to drive an injection molding box (17) to move downwards and drive a lifting pipeline (18) to move downwards, inserting the lifting pipeline (18) downwards into the injection molding pipeline (8), sleeving a sealing ferrule (19) on the surface of the injection molding pipeline (8) to form a sealing structure, and injecting injection molding liquid into the injection molding die through the lifting pipeline (18);

and step three, molding for one minute after injection molding, then starting a driving motor to drive a driving gear (14) to rotate to drive a gear ring (15) to rotate, driving a rolling inner ring (5) to rotate in a movable die (4) and a fixed die (2) through a sliding block (12) by the gear ring (15), driving a feeding pipeline (9) to rotate, cutting off a water gap on the surface of the molded part, then inputting cooling water into a cooling pipeline (20) through a water tank to cool the cooling pipeline, withdrawing a first electric push rod (3) after cooling is finished, driving the movable die (4) to demold, then taking out the corrugated pipe after injection molding, and continuously processing.

2. The process for preparing high-strength HDFE double-wall corrugated pipe according to claim 1, wherein the process comprises the following steps: the molding equipment comprises a frame (1), wherein the inner cavity of the frame (1) is fixedly connected with a fixed mold (2) through a fixed frame, a first electric push rod (3) is fixedly connected to the left side of the frame (1), one end of the first electric push rod (3) penetrates through and extends to the right side of the frame (1), the right end of the first electric push rod (3) is fixedly connected with a movable die (4), the movable die (4) and the inner cavity of the fixed die (2) are both rotationally connected with a rolling inner ring (5), the surface of the frame (1) is fixedly connected with an inner die (6) through a connecting frame, the inner mould (6) is arranged in the inner cavities of the two rolling inner rings (5), the surface of the rolling inner ring (5) is connected with a ball (7) in a rolling way, and the surface of the ball (7) is respectively connected with the inner cavities of the movable die (4) and the fixed die (2) in a rolling way;

the top of fixed mould (2) and movable mould (4) all communicates injection moulding pipeline (8), the top intercommunication of rolling inner circle (5) has charge-in pipeline (9), the top intercommunication of charge-in pipeline (9) has arc closing plate (10), the top of arc closing plate (10) runs through fixed mould (2) and movable mould (4) respectively and extends to the inner chamber of fixed mould (2) and movable mould (4), the inner chamber of fixed mould (2) and movable mould (4) all seted up with the surperficial swing joint's of arc closing plate (10) movable groove (11), the bottom of injection moulding pipeline (8) and the top butt of arc closing plate (10).

3. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 2, wherein the process comprises the following steps: the surface fixedly connected with sliding block (12) of rolling inner circle (5), one side of sliding block (12) runs through the inner chamber of fixed mould (2) and extends to the surface of fixed mould (2), sliding tray (13) with the surface sliding connection of sliding block (12) are seted up to the inner chamber of fixed mould (2).

4. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 3, wherein the process comprises the following steps: the surface of frame (1) rotates and is connected with drive gear (14), the surperficial fixed connection of sliding block (12) has ring gear (15) with the surface meshing transmission of drive gear (14), drive gear (14) are through driving motor drive.

5. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 2, wherein the process comprises the following steps: the top fixedly connected with second electric push rod (16) of frame (1), the bottom fixedly connected with of second electric push rod (16) piston rod moulds plastics case (17), the bottom intercommunication of moulding plastics case (17) has lift pipeline (18), the bottom of lift pipeline (18) is run through and is extended to the inner chamber of moulding plastics pipeline (8).

6. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 5, wherein the process comprises the following steps: the surface of the lifting pipeline (18) is sleeved with a sealing ferrule (19), and the sealing ferrule (19) is sleeved on the surface of the injection molding pipeline (8).

7. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 2, wherein the process comprises the following steps: the surface of the rack (1) is fixedly connected with a water tank, the surface of the water tank is communicated with a cooling pipeline (20), one end of the cooling pipeline (20) penetrates through the inner die (6) and extends to the inner cavity of the inner die (6), and the cooling pipeline (20) is annularly wound and distributed in the inner cavity of the inner die (6).

8. The process for preparing high-strength HDFE double-wall corrugated pipe as claimed in claim 2, wherein the process comprises the following steps: one side of each rolling inner ring (5) is fixedly connected with a sealing clamping piece matched with one side of the rolling inner ring.

Background

A high-density polyethylene (HDPE) double-wall corrugated pipe is a novel pipe with an outer wall with an annular structure and a smooth inner wall, and has been developed and perfected for more than ten years from a single variety to a complete product series. The production process and the use technology are mature at present. Due to its excellent performance and relatively economical cost, it has been greatly popularized and applied. The popularization and application of the HDPE double-wall corrugated pipe are in the rising potential state, and all technical indexes reach the use standard. The inner wall of the double-wall corrugated pipe is generally blue and black, and the outer wall of the double-wall corrugated pipe is of an annular corrugated structure, so that the annular rigidity of the pipe is greatly enhanced, the resistance of the pipe to soil load is enhanced, and the HDPE double-wall corrugated pipe has obvious advantages compared with other pipes in the aspect of performance.

According to the outer pipe wall mold for processing the double-wall corrugated pipe, which is disclosed in the patent No. CN209699692U, the following defects exist in use:

(1) the formed water gap has no good treatment means, the forming quality of the corrugated pipe is affected, and secondary processing is needed.

(2) There is no good sealing means for the injection molding pipe, and the injection molding liquid is easy to leak out.

(3) The molded part cannot be rapidly cooled and molded.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a preparation process of a high-strength HDFE double-wall corrugated pipe, and solves the problems that a formed water gap has no good treatment means, the forming quality of the corrugated pipe is influenced, and secondary processing is required.

In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation process of a high-strength HDFE double-wall corrugated pipe comprises the following steps: the method comprises the following steps:

firstly, processing is carried out through molding equipment, injection molding liquid is added into an injection molding box, a first electric push rod is started to drive a movable mold to move rightwards, the movable mold is driven to be matched with a fixed mold, two rolling inner rings are driven to be clamped together through a sealing clamping piece, the two rolling inner rings are sleeved on the surface of an inner mold, and the injection molding mold is molded;

step two, starting a second electric push rod to drive the injection molding box to move downwards and drive the lifting pipeline to move downwards, inserting the lifting pipeline into the injection molding pipeline downwards, sleeving the sealing ring on the surface of the injection molding pipeline to form a sealing structure, and injecting injection molding liquid into the injection molding die through the lifting pipeline;

and step three, molding for one minute after injection molding, then starting a driving motor to drive a driving gear to rotate, driving a gear ring to rotate, driving a rolling inner ring to rotate in a movable mold and a fixed mold through a sliding block by the gear ring, driving a feeding pipeline to rotate, cutting off a water gap on the surface of the molded part, then inputting cooling water into a cooling pipeline through a water tank, cooling the cooling pipeline, withdrawing a first electric push rod after cooling, driving the movable mold to demould, then taking out the injection molded corrugated pipe, and continuously processing.

As a further scheme of the invention: the forming equipment comprises a rack, wherein a fixed mould is fixedly connected to the inner cavity of the rack through a fixed frame, a first electric push rod is fixedly connected to the left side of the rack, one end of the first electric push rod penetrates through and extends to the right side of the rack, a movable mould is fixedly connected to the right end of the first electric push rod, rolling inner rings are rotatably connected to the inner cavities of the movable mould and the fixed mould, an inner mould is fixedly connected to the surface of the rack through a connecting frame, the inner cavities of the two rolling inner rings are arranged in the inner mould, balls are rotatably connected to the surfaces of the rolling inner rings, the surfaces of the balls are respectively rotatably connected with the inner cavities of the movable mould and the fixed mould, the rolling inner rings rotate in the movable mould and the fixed mould to drive a feeding pipeline to rotate, a water gap on the surface of a formed part is cut off, then cooling water is input into the cooling pipeline through a water tank to cool the cooling pipeline, after cooling, the first electric push rod is withdrawn to drive the movable die to demould, and then the injection molded corrugated pipe is taken out, so that a water gap can be rapidly cut off, no residue is left on the surface of the injection molded pipeline, and secondary processing is not needed;

the top of fixed mould and movable mould all communicates there is the pipeline of moulding plastics, the top intercommunication of rolling inner circle has charge-in pipeline, charge-in pipeline's top intercommunication has the arc closing plate, the top of arc closing plate runs through fixed mould and movable mould respectively and extends to the inner chamber of fixed mould and movable mould, the movable groove with the surperficial swing joint of arc closing plate is all seted up to the inner chamber of fixed mould and movable mould, the bottom of the pipeline of moulding plastics and the top butt of arc closing plate.

As a further scheme of the invention: the surface of the rolling inner ring is fixedly connected with a sliding block, one side of the sliding block penetrates through the inner cavity of the fixed die and extends to the surface of the fixed die, and the inner cavity of the fixed die is provided with a sliding groove in sliding connection with the surface of the sliding block.

As a further scheme of the invention: the surface of frame rotates and is connected with drive gear, the surperficial fixed connection of sliding block has the driven ring gear with drive gear's surface meshing, drive gear passes through driving motor drive.

As a further scheme of the invention: the top fixedly connected with second electric push rod of frame, the bottom fixedly connected with case of moulding plastics of second electric push rod piston rod, the bottom intercommunication of case of moulding plastics has the lift pipeline, the bottom of lift pipeline runs through and extends to the inner chamber of the pipeline of moulding plastics.

As a further scheme of the invention: the surface of the lifting pipeline is sleeved with a sealing ferrule, and the sealing ferrule is sleeved on the surface of the injection molding pipeline.

As a further scheme of the invention: the surface of the rack is fixedly connected with a water tank, the surface of the water tank is communicated with a cooling pipeline, one end of the cooling pipeline penetrates through the inner die and extends to the inner cavity of the inner die, and the cooling pipeline is annularly wound and distributed in the inner cavity of the inner die.

As a further scheme of the invention: and one side of each rolling inner ring is fixedly connected with a sealing clamping piece matched with one side of the rolling inner ring.

Advantageous effects

The invention provides a preparation process of a high-strength HDFE double-wall corrugated pipe. Compared with the prior art, the method has the following beneficial effects:

1. a first electric push rod is fixedly connected to the left side of a rack, one end of the first electric push rod penetrates through and extends to the right side of the rack, a movable die is fixedly connected to the right end of the first electric push rod, rolling inner rings are rotatably connected to inner cavities of the movable die and a fixed die, an inner die is fixedly connected to the surface of the rack through a connecting frame and is arranged in the inner cavities of the two rolling inner rings, balls are connected to the surfaces of the rolling inner rings in a rolling mode, and the surfaces of the balls are respectively connected with the inner cavities of the movable die and the fixed die in a rolling mode; the top of the fixed mold and the top of the movable mold are both communicated with injection molding pipelines, the top of the rolling inner ring is communicated with a feeding pipeline, the top of the feeding pipeline is communicated with an arc-shaped sealing plate, the top of the arc-shaped sealing plate respectively penetrates through the fixed mold and the movable mold and extends to the inner cavities of the fixed mold and the movable mold, the inner cavities of the fixed mold and the movable mold are both provided with movable grooves movably connected with the surface of the arc-shaped sealing plate, the bottom end of the injection molding pipeline is abutted against the top of the arc-shaped sealing plate, the rolling inner ring rotates in the movable mold and the fixed mold to drive the feeding pipeline to rotate, a water gap on the surface of a formed part is cut off, then cooling water is input into the cooling pipeline through a water tank to cool the cooling pipeline, after cooling is finished, the first electric push rod is retracted to drive the movable mold to demould, then the corrugated pipe which is subjected to injection molding is taken out, the water gap can be quickly cut off, and no residue is left on the surface of the pipeline which is subjected to injection molding, no secondary processing is required.

2. The utility model provides a preparation technology of high strength HDFE double-walled bellows, top fixedly connected with second electric push rod through the frame, the case is moulded plastics to the bottom fixedly connected with of second electric push rod piston rod, the bottom intercommunication of the case of moulding plastics has the pipeline, the bottom of pipeline runs through and extends to the inner chamber of the pipeline of moulding plastics, the surface cover of pipeline is equipped with the seal lasso, the surface at the pipeline of moulding plastics is established to the seal lasso cover, the seal lasso cover is established on the surface of the pipeline of moulding plastics, start second electric push rod and drive the case downstream of moulding plastics, drive the pipeline downstream, the pipeline of lifting is pegged graft downwards in the pipeline of moulding plastics, the surface at the pipeline of moulding plastics is established to the seal lasso cover this moment, form seal structure, through the pipeline toward moulding plastics in-mould injection moulding plastics liquid, it is sealed effectual, prevent that the liquid of moulding plastics from leaking outward.

Drawings

FIG. 1 is a schematic external view of the present invention;

FIG. 2 is a structural sectional view of a fixed mold and a movable mold according to the present invention;

FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 1;

fig. 4 is a structural sectional view of the inner mold of the present invention;

fig. 5 is a schematic structural view of the inner mold of the present invention.

In the figure: 1. a frame; 2. a fixed mold; 3. a first electric push rod; 4. moving the mold; 5. rolling the inner ring; 6. an inner mold; 7. a ball bearing; 8. injecting a pipeline; 9. a feed conduit; 10. an arc-shaped sealing plate; 11. a movable groove; 12. a slider; 13. a sliding groove; 14. a drive gear; 15. a ring gear; 16. a second electric push rod; 17. injection molding a box; 18. a lifting pipe; 19. sealing the ferrule; 20. and (6) cooling the pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a preparation process of a high-strength HDFE double-wall corrugated pipe comprises the following steps:

firstly, processing is carried out through molding equipment, injection molding liquid is added into an injection molding box 17, a first electric push rod 3 is started to drive a movable mold 4 to move rightwards, the movable mold is driven to be matched with a fixed mold 2, two rolling inner rings 5 are driven to be clamped together through a sealing clamping piece, the two rolling inner rings 5 are sleeved on the surface of an inner mold 6, and the injection molding is carried out;

step two, starting a second electric push rod 16 to drive an injection molding box 17 to move downwards and drive a lifting pipeline 18 to move downwards, inserting the lifting pipeline 18 downwards into the injection molding pipeline 8, sleeving a sealing ferrule 19 on the surface of the injection molding pipeline 8 to form a sealing structure, and injecting injection molding liquid into the injection molding die through the lifting pipeline 18;

and step three, molding for one minute after injection molding, then starting a driving motor to drive a driving gear 14 to rotate, driving a gear ring 15 to rotate, driving a rolling inner ring 5 to rotate in a movable die 4 and a fixed die 2 through a sliding block 12 by the gear ring 15, driving a feeding pipeline 9 to rotate, cutting off a water gap on the surface of a molded part, then inputting cooling water into a cooling pipeline 20 through a water tank, cooling the cooling pipeline, withdrawing a first electric push rod 3 after cooling, driving the movable die 4 to demold, then taking out the injection molded corrugated pipe, and continuously processing.

The forming equipment comprises a rack 1, wherein a fixed die 2 is fixedly connected to the inner cavity of the rack 1 through a fixed frame, a first electric push rod 3 is fixedly connected to the left side of the rack 1, one end of the first electric push rod 3 penetrates through and extends to the right side of the rack 1, a movable die 4 is fixedly connected to the right end of the first electric push rod 3, a rolling inner ring 5 is rotatably connected to the inner cavities of the movable die 4 and the fixed die 2, an inner die 6 is fixedly connected to the surface of the rack 1 through a connecting frame, the inner die 6 is internally arranged in the inner cavities of the two rolling inner rings 5, the rolling inner rings 5 rotate in the movable die 4 and the fixed die 2 to drive a feeding pipeline 9 to rotate, a water gap on the surface of a formed part is cut off, cooling water is input into a cooling pipeline 20 through a water tank to cool the cooling pipeline, after cooling is finished, the first electric push rod 3 is withdrawn to drive the movable die 4 to demould, and then the injection-molded corrugated pipe is taken out, the water gap can be cut off rapidly, no residue is left on the surface of the pipeline after injection molding, secondary processing is not needed, the surface of the rolling inner ring 5 is connected with the ball 7 in a rolling way, and the surface of the ball 7 is respectively connected with the inner cavities of the movable mold 4 and the fixed mold 2 in a rolling way;

fixed mould 2 and movable mould 4's top all communicates and has the pipeline 8 of moulding plastics, the top intercommunication of rolling inner circle 5 has charge-in pipeline 9, charge-in pipeline 9's top intercommunication has arc closing plate 10, fixed mould 2 and movable mould 4 are run through respectively at arc closing plate 10's top and extend to fixed mould 2 and movable mould 4's inner chamber, fixed mould 2 and movable mould 4's inner chamber all offer with arc closing plate 10's surperficial swing joint's movable groove 11, mould plastics pipeline 8's bottom and arc closing plate 10's top butt.

Sliding block 12 is fixedly connected to the surface of rolling inner ring 5, one side of sliding block 12 runs through the inner cavity of fixed mould 2 and extends to the surface of fixed mould 2, and sliding groove 13 connected with the surface of sliding block 12 is opened in the inner cavity of fixed mould 2.

A driving gear 14 is rotatably connected to the surface of frame 1, a gear ring 15 in meshing transmission with the surface of driving gear 14 is fixedly connected to the surface of sliding block 12, and driving gear 14 is driven by a driving motor.

Frame 1's top fixedly connected with second electric push rod 16, the bottom fixedly connected with of second electric push rod 16 piston rod moulds plastics case 17, the bottom intercommunication of case 17 of moulding plastics has pipeline 18, it drives the case 17 downstream of moulding plastics to start second electric push rod 16, drive pipeline 18 downstream, pipeline 18 pegs graft in pipeline 8 of moulding plastics downwards, 19 covers of sealed lasso are established on the surface of pipeline 8 of moulding plastics this moment, form seal structure, inject into the liquid of moulding plastics in toward the mould of moulding plastics through pipeline 18, it is sealed effectual, prevent to mould plastics the liquid and leak outward, the bottom of pipeline 18 runs through and extends to the inner chamber of pipeline 8 of moulding plastics.

The surface of the lifting pipe 18 is sleeved with a sealing ferrule 19, and the sealing ferrule 19 is sleeved on the surface of the injection molding pipe 8.

The surface of the frame 1 is fixedly connected with a water tank, the surface of the water tank is communicated with a cooling pipeline 20, one end of the cooling pipeline 20 penetrates through the inner die 6 and extends to the inner cavity of the inner die 6, and the cooling pipeline 20 is annularly wound and distributed in the inner cavity of the inner die 6.

One side of the two rolling inner rings 5 is fixedly connected with a sealing clamping piece matched with one side of the rolling inner rings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.