Method and Device for Jet-Packing Moulding Polymer Pipeline

Abstract

A method and a device is disclosed for jet-packing moulding a polymer pipeline. During a spiral winding stack moulding process, a pipeline is continuously moulded by embedding the melt in a moulded pipe blank under the conjunction of the jetting welding effect produced by the melt and the shaping effect of partial calendering. The device includes an extruder, a melt jetting mechanism, a partial calendering mechanism and a pipe diameter shaping and adjusting mechanism. The melt jetting mechanism is arranged at the extrusion end of the extruder and embedded in a moulded pipe blank. The partial calendering mechanism and the pipe diameter shaping and adjusting mechanism are distributed on the wall of the pipe blank in the circumferential direction. The partial calendering mechanism is arranged at the corresponding position of the melt jetting mechanism.

Claims

1. A method for jet-packing moulding a polymer pipeline, comprising: continuously moulding a pipeline during a spiral winding stack moulding process by embedding a melt in a moulded pipe blank under the conjunction of a jetting welding effect produced by the melt and a shaping effect of partial calendering.

2. A device for jet-packing moulding a polymer pipeline, comprising: an extruder, a melt jetting mechanism, a partial calendering mechanism and a pipe diameter shaping and adjusting mechanism, wherein the melt jetting mechanism is arranged at an extrusion end of the extruder and is embedded in a moulded pipe blank; the partial calendering mechanism and the pipe diameter shaping and adjusting mechanism are distributed on a pipe wall of the pipe blank in the circumferential direction; the partial calendering mechanism is arranged at a corresponding position of the melt jetting mechanism; the melt jetting mechanism is located inside the pipe wall; the partial calendering mechanism is located outside the pipe wall; and a constrained space is formed between the partial calendering mechanism and the melt jetting mechanism.

3. The device according to claim 2, wherein the melt jetting mechanism is an embedded feed nozzle.

4. The device according to claim 2, wherein a frame is arranged on a bottom of the extruder, a mounting plate is arranged on a side of the frame at the extrusion end of the extruder, and the melt jetting mechanism, the partial calendering mechanism and the pipe diameter shaping and adjusting mechanism are respectively installed on a mounting plate.

5. The device according to claim 4, wherein the pipe blank is also provided on a periphery with a rotary traction mechanism including a spiral traction member and a support rod, and with a plurality of spiral traction members that are respectively connected to the mounting plate through the corresponding support rods.

6. The device according to claim 2, wherein the partial calendering mechanism comprises a driving calendering roller, a driven calendering roller and a drive motor, the driving calendering roll and the driven calendering roller being respectively arranged on the inner and outer sides of the pipe blank, the driving calendering roll being connected with the drive motor, the melt jetting mechanism being provided in a space between the driving calendering roll and the driven calendering roller.

7. The device according to claim 6, wherein an adjustment member is also provided above the partial calendering mechanism for adjusting a thickness of the pipe wall.

8. The device according to claim 6, wherein the driving calendering roll and the driven calendering roller are also externally connected with a temperature regulation system.

9. The device according to claim 2, wherein the pipe diameter shaping and adjusting mechanism comprises a plurality of shaping roller sets and adjustment members, which correspond one by one and are distributed along the circumferential direction of the pipe blank.

10. The device according to claim 2, wherein the plurality of shaping roller sets have the same structure and each comprise an inner shaping roller arranged inside the pipe blank and an outer shaping roller arranged outside the pipe blank, with a constraint spring arranged between the inner shaping roller and the outer shaping roller.

11. The method according to claim 1, comprising: providing a device for jet-packing moulding a polymer pipeline, comprising: an extruder, a melt jetting mechanism, a partial calendering mechanism and a pipe diameter shaping and adjusting mechanism, wherein the melt jetting mechanism is arranged at an extrusion end of the extruder and is embedded in a moulded pipe blank; the partial calendering mechanism and the pipe diameter shaping and adjusting mechanism are distributed on a pipe wall of the pipe blank in the circumferential direction; the partial calendering mechanism is arranged at a corresponding position of the melt jetting mechanism; the melt jetting mechanism is located inside the pipe wall; the partial calendering mechanism is located outside the pipe wall; and a constrained space is formed between the partial calendering mechanism and the melt jetting mechanism.

12. The method according to claim 11, wherein the melt jetting mechanism is an embedded feed nozzle.

13. The method according to claim 11, wherein a frame is arranged on a bottom of the extruder, a mounting plate is arranged on a side of the frame at the extrusion end of the extruder, and the melt jetting mechanism, the partial calendering mechanism and the pipe diameter shaping and adjusting mechanism are respectively installed on a mounting plate.

14. The method according to claim 13, wherein the pipe blank is also provided on a periphery with a rotary traction mechanism including a spiral traction member and a support rod, and with a plurality of spiral traction members that are respectively connected to the mounting plate through the corresponding support rods.

15. The method according to claim 11, wherein the partial calendering mechanism comprises a driving calendering roller, a driven calendering roller and a drive motor, the driving calendering roll and the driven calendering roller being respectively arranged on the inner and outer sides of the pipe blank, the driving calendering roll being connected with the drive motor, the melt jetting mechanism being provided in a space between the driving calendering roll and the driven calendering roller.

16. The method according to claim 15, wherein an adjustment member is also provided above the partial calendering mechanism for adjusting a thickness of the pipe wall.

17. The method according to claim 15, wherein the driving calendering roll and the driven calendering roller are also externally connected with a temperature regulation system.

18. The method according to claim 11, wherein the pipe diameter shaping and adjusting mechanism comprises a plurality of shaping roller sets and adjustment members, which correspond one by one and are distributed along the circumferential direction of the pipe blank.

19. The method according to claim 11, wherein the plurality of shaping roller sets have the same structure and each comprise an inner shaping roller arranged inside the pipe blank and an outer shaping roller arranged outside the pipe blank, with a constraint spring arranged between the inner shaping roller and the outer shaping roller.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a schematic view of the structure of the device for jet-packing moulding a polymer pipeline.

[0029] FIG. 2 is a partial enlarged view of the embedded feed nozzle in FIG. 1.

[0030] FIG. 3 is a position relationship diagram of the partial calendering mechanism and the feed nozzle.

[0031] FIG. 4 is a schematic diagram of the pipe diameter shaping and adjusting mechanism.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present invention will be further described in detail below with reference to examples; however, the embodiments of the present invention are not limited thereto.

Example

[0033] This example shows a method and a device for jet-packing moulding a polymer pipeline, whose melt supply device is an extruder.

[0034] As shown in FIGS. 1 or 4, this device for jet-packing moulding comprises an extruder 1 (as a polymer melt supply device), an embedded feed nozzle 3 (as a melt jetting mechanism), a driving calendering roll 6, a driven calendering roll 7, a drive motor 2, a rotary traction mechanism, a frame 12 and a pipe diameter shaping and adjusting mechanism. The driving calendering roll 6, the driven calendering roll 7 and the drive motor 2 compose a partial calendering mechanism; the rotary traction mechanism consists of a spiral traction member 10 and a support rod 9; the embedded feed nozzle 3 is connected with the extruder 1; the feed nozzle is also provided with a baffle 15, on which the embedded feed nozzle is fixed; the driving calendering roll 6 and the driven calendering roll 7 are respectively fixed on the mounting plate 4; the driving calendering roll 6, connected with the drive motor, can make active rotation movement; and the driving calendering roll 6 and the driven calendering roll 7 can be moved along the radial direction of the polymer pipeline; in the pipe diameter shaping and adjusting mechanism, the position of the shaping roller set 8 can be adjusted in the direction of the pipe diameter under the action of the adjustment member 13, as shown in FIG. 1; the extruder 1 and the mounting plate 4 are fixed on the frame 12.

[0035] The extruder 1 extrudes the polymer melt of a certain pressure and temperature, which is jetted into a constrained space (consisting of the driving calendering roll 6, the driven calendering roll 7 and the baffle 15, as shown in FIGS. 2 or 3) through the supply nozzle 3, with the feed nozzle extending into the melt; with the help of constraining, calendering and shaping effects of the two calendering rollers and under the action of the pipe diameter shaping and adjusting mechanism, the calendered plastic melt first forms a section of polymer pipeline along the shaping roller set 8 in the pipe diameter shaping and adjusting mechanism, which section of polymer pipeline spirally moves forward under the joint action of the spiral traction member 10 and the pipe diameter shaping and adjusting mechanism, with the subsequent polymer melt continuing to be jetted and stacked between the two calendering rollers and the initial polymer pipeline; in moulding, the feed nozzle is fixed, and the driving calendering roll 6 and the driven calendering roll 7 are rotated; under the action of pressure, the first moulded pipeline and the subsequently jetted melt are fully fused together, and form a continuous polymer pipeline 11 after cooling shaping. After a desired section of polymer pipeline is moulded, a cutting device is used to cut the pipeline. By repeating in this way, a length of polymer pipeline is moulded. An adjustment member 5 is also provided above the partial calendering mechanism for adjusting the thickness of the pipe wall. When the polymer pipeline changes in size such as diameter and wall thickness, the positions of the driving calendering roll 6, the driven calendering roll 7, the spiral traction member and the shaping roller set 8 on the mounting plate can be respectively adjusted as well as the position of the feed nozzle 3, thus moulding the pipelines of different specifications.

[0036] The present invention can be well implemented as described above. The examples as described above are only the preferred examples of the present invention, and are not intended to limit the scope thereof; that is, variations and modifications consistent with the present invention are intended to be encompassed by the scope of the present invention as claimed by the appended claims.