CN219903247U - Extrusion and pressurizing cooling die for inner wall coating layer of plastic steel winding pipe - Google Patents
Extrusion and pressurizing cooling die for inner wall coating layer of plastic steel winding pipe Download PDFInfo
- Publication number
- CN219903247U CN219903247U CN202321007428.XU CN202321007428U CN219903247U CN 219903247 U CN219903247 U CN 219903247U CN 202321007428 U CN202321007428 U CN 202321007428U CN 219903247 U CN219903247 U CN 219903247U
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- melt
- diameter channel
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- diameter
- die
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 229920003023 plastic Polymers 0.000 title claims abstract description 18
- 239000004033 plastic Substances 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 title claims abstract description 14
- 238000001125 extrusion Methods 0.000 title claims abstract description 12
- 238000004804 winding Methods 0.000 title claims abstract description 12
- 239000011247 coating layer Substances 0.000 title claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 abstract description 19
- -1 polyethylene Polymers 0.000 abstract description 19
- 229920000573 polyethylene Polymers 0.000 abstract description 19
- 238000000465 moulding Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The plastic steel winding pipe inner wall coating layer extrusion and pressurizing cooling mold comprises an inner mold and an outer mold which are connected in a matched and sleeved mode, an annular melt channel is formed between the inner mold and the outer mold, a compression air chamber and air holes are formed in the inner mold, high-pressure air can blow polyethylene melt discharged from an annular melt outlet onto the inner wall of a pipe, spiral convex-concave unevenness of the inner wall of the pipe is made up, the inner wall of the pipe is kept smooth, and normal use of the pipe is ensured.
Description
Technical Field
The utility model relates to the technical field of plastic steel pipe inner coating processing equipment, in particular to a plastic steel winding pipe inner wall coating extrusion and pressurizing cooling die.
Background
In the current pipe manufacturing field, in order to produce pipes with larger pipe diameters and reduce the manufacturing cost of a die, a production method for winding plastic steel plate belts into pipes is generally selected, and has great advantages in the aspects, and pipes with different diameters can be produced by using the same plastic steel plate belt, but the method has the following defects in the winding production process: adjacent plastic steel plate strips are mutually heat-sealed together, spiral bulges or depressions are formed on the inner wall of the pipeline, and the roughness coefficient of the inner wall of the produced pipe is increased, so that the normal use of the pipe is affected.
Disclosure of Invention
The utility model aims to provide an extrusion and pressurizing cooling die for an inner wall coating layer of a plastic steel winding pipe, which can be used for extrusion coating a polyethylene thin layer on the inner wall of a formed pipe in the pipe processing process, make up for spiral convex-concave unevenness on the inner wall of the spiral formed pipe, reduce the roughness coefficient of the inner wall of the pipe and enable the inner surface of the pipe to be smooth, and solve the problems in the prior art.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a plastic steel winding pipe inner wall coating extrudes and pressurization cooling mould, including centre form and external mold, the external mold suit forms annular melt passageway between internal mold and the external mold in the periphery of mould front end, the melt import has been seted up to the front end of external mold, form annular melt export between the rear end of external mold and the internal mold, melt import and annular melt export all are linked together with annular melt passageway, the one end that the internal mold stretched out the external mold is equipped with compressed air chamber, a plurality of exhaust holes have been seted up to compressed air chamber's periphery, install a plurality of first reposition of redundant personnel shuttle that the circumference was arranged between internal mold and external mold that is close to melt import one end, first reposition of redundant personnel shuttle is located annular melt passageway, through-hole has been seted up in one of them first reposition of redundant personnel shuttle, install compressed air circuit in the through-hole, compressed air circuit's one end is linked together with compressed air chamber, compressed air circuit's the other end is worn out and links to each other with gas compressor via the external mold. The periphery of external mold is equipped with first protruding edge and second protruding edge, and the diameter of second protruding edge is greater than the diameter of first protruding edge, and wherein the protruding edge of second is located annular melt export's front side. The cavity is formed in one end of the inner die, extending out of the outer die, and the compressed air chamber is an annular air chamber wrapped on the periphery of the cavity. The annular melt channel comprises an inclined equal-diameter channel, an axial large-diameter channel, an inclined variable-diameter channel, an axial small-diameter channel and a radial equal-diameter channel which are sequentially communicated, wherein the inclined equal-diameter channel is communicated with the melt inlet, the radial equal-diameter channel is communicated with the annular melt outlet, the first split shuttle is positioned in the axial large-diameter channel, and the inner diameter of the inclined variable-diameter channel close to one end of the axial large-diameter channel is larger than that of the inclined variable-diameter channel close to one end of the axial small-diameter channel. A plurality of second split shuttles are circumferentially arranged in the axial small-diameter channel, the second split shuttles are connected between the inner die and the outer die, the distance between the second split shuttles and the annular melt outlet is L, L is 10-20cm, the first split shuttles and the second split shuttles are streamline in the length direction, and the two ends of the first split shuttles and the second split shuttles are tips with smaller diameters.
The utility model has the positive effects that: the utility model relates to an extrusion and pressurizing cooling die for an inner wall coating of a plastic steel winding pipe, which comprises an inner die and an outer die which are matched and sleeved and connected, wherein an annular melt channel is formed between the inner die and the outer die, a compressed air chamber and air holes are formed in the inner die, high-pressure air can blow polyethylene melt discharged from an annular melt outlet onto the inner wall of the pipe, the spiral uneven of the inner wall of the pipe is made up, the inner wall of the pipe is kept smooth, and normal use of the pipe is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a half cross-sectional view of the present utility model;
FIG. 3 is an enlarged view of the cross-sectional view taken along line A-A in FIG. 2;
FIG. 4 is an enlarged view of the B-B cross-sectional view of FIG. 2;
fig. 5 is an enlarged view of the cross-sectional view taken along line C-C in fig. 2.
Detailed Description
The utility model relates to an extrusion and pressurizing cooling die for an inner wall coating layer of a plastic steel winding pipe, which is shown in fig. 1 and 2, and comprises an inner die 1 and an outer die 2, wherein the outer die 2 is sleeved on the periphery of the front end of the inner die 1, an annular melt channel 3 is formed between the inner die 1 and the outer die 2, a melt inlet 4 is formed at the front end of the outer die 2, an annular melt outlet 13 is formed between the rear end of the outer die 2 and the inner die 1, the melt inlet 4 and the annular melt outlet 13 are both communicated with the annular melt channel 3, and polyethylene melt can enter the annular melt channel 3 through the melt inlet 4 and is discharged from the die to the inner wall of the pipe through the annular melt outlet 13.
One end of the inner mold 1 extending out of the outer mold 2 is provided with a compressed air chamber 8, the periphery of the compressed air chamber 8 is provided with a plurality of exhaust holes 9, and high-pressure air in the compressed air chamber 8 can be blown out through the exhaust holes 9.
The plastic steel winding pipe inner wall coating layer extrusion and pressurizing cooling mold is positioned in the molding pipe, the polyethylene melt can be conveyed to the inner mold 1 position of the periphery of the air hole 9 through the annular melt channel 3, and along with the continuous movement of the molding pipe, the high-pressure gas blown out of the air hole 9 blows the polyethylene melt to the inner wall of the pipe, namely, the polyethylene melt is pressed to the inner periphery of the pipe and forms a smooth inner coating. In addition to the above-mentioned action, the blown high-pressure gas can also make the inner coating layer formed from polyethylene melt material quickly cooled and solidified, and can be firmly adhered on the inner peripheral wall of the pipe material.
In order to realize the connection between the inner mold 1 and the outer mold 2, a plurality of first split shuttles 10 which are circumferentially arranged are arranged between the inner mold 1 and the outer mold 2 close to one end of the melt inlet 4, the first split shuttles 10 are positioned in the annular melt channel 3, through holes are formed in one of the first split shuttles 10, a compression gas passage 11 is arranged in each through hole, one end of each compression gas passage 11 is communicated with the compression gas chamber 8, the other end of each compression gas passage 11 penetrates out through the outer mold 2 and is connected with the gas compressor, and due to the arrangement of the structure, the integral mold can provide necessary high-pressure gas for the compression gas chamber 8 when the polyethylene inner coating is extruded and coated in the pipe.
Further, in order to enable the whole die to be installed on the pipe molding device, the outer periphery of the outer die 2 is provided with a first protruding edge 5 and a second protruding edge 6, the diameter of the second protruding edge 6 is larger than that of the first protruding edge 5, the second protruding edge 6 is located at the front side of the annular molten material outlet 13, the outer periphery of the outer die 2 at the front end of the first protruding edge 5 can be connected with the pipe molding device, the pipe can be coated with polyethylene molten material on the inner peripheral wall immediately after being manufactured and molded, the second protruding edge 6 is in contact with the inner peripheral wall of the pipe, and polyethylene in a hot melting state can be effectively prevented from flowing in the opposite direction of the movement of the pipe.
Further, in order to reduce the weight of the whole die, a cavity 12 is formed in one end of the inner die 1 extending out of the outer die 2, and the compressed air chamber 8 is an annular air chamber wrapped around the periphery of the cavity 12.
Further, in order to enable the polyethylene melt to move more smoothly to the annular melt outlet 13 in the annular melt channel 3 and to enable the high-pressure gas to blow the polyethylene melt to the inner peripheral wall of the pipe to form an inner coating, the annular melt channel 3 comprises an inclined equal-diameter channel 14, an axial large-diameter channel 15, an inclined variable-diameter channel 16, an axial small-diameter channel 17 and a radial equal-diameter channel 18 which are sequentially communicated, wherein the inclined equal-diameter channel 14 is communicated with the melt inlet 4, the radial equal-diameter channel 18 is communicated with the annular melt outlet 13, the first split shuttle 10 is positioned in the axial large-diameter channel 15, and the inner diameter of the inclined variable-diameter channel 16 near one end of the axial large-diameter channel 15 is larger than the inner diameter of the inclined variable-diameter channel 16 near one end of the axial small-diameter channel 17. The arrangement of the channels not only accords with the structure of the integral die, but also enables the polyethylene melt to smoothly move to the position of the inner peripheral wall of the molding pipe in a baking and melting state, and avoids the conditions of blockage, siltation and the like of the polyethylene melt in the conveying process.
Further, in order to reinforce the connection of the inner die 1 and the outer die 2, a plurality of second split shuttles 19 are installed in the axial small diameter passage 17 in a circumferential arrangement, and the second split shuttles 19 are connected between the inner die 1 and the outer die 2. Wherein the second shunt shuttle 19 is located at a distance L, which may be 10-20cm, from the annular melt outlet 13, leaving sufficient converging space for the polyethylene melt. The first shunt shuttle 10 and the second shunt shuttle 19 are both located in the annular melt channel 3, if the cross-sectional area in the melt channel is too large, the conveying of polyethylene melt can be affected, in order to reduce the flow obstruction of the shunt shuttle to the polyethylene melt, the first shunt shuttle 10 and the second shunt shuttle 19 are streamline in the length direction, the two ends are tips with smaller diameters, and the flow obstruction to the polyethylene melt can be effectively reduced due to the arrangement of the tips.
The technical scheme of the utility model is not limited to the scope of the embodiments of the utility model. The technical content that is not described in detail in the utility model is known in the prior art.
Claims (5)
1. The utility model provides a plastic steel winding pipe inner wall coating extrudes and pressurization cooling mould which characterized in that: including centre form (1) and external mold (2), the periphery of mould (1) front end is including external mold (2) suit, form annular melt passageway (3) between internal mold (1) and external mold (2), melt import (4) have been seted up to the front end of external mold (2), form annular melt export (13) between the rear end of external mold (2) and internal mold (1), melt import (4) and annular melt export (13) all are linked together with annular melt passageway (3), the one end that external mold (2) was stretched out to internal mold (1) is equipped with compressed air chamber (8), a plurality of exhaust holes (9) have been seted up to the periphery of compressed air chamber (8), install a plurality of first split shuttle (10) that the circumference was arranged between internal mold (1) and external mold (2) that are close to melt import (4) one end, first split shuttle (10) are located annular melt passageway (3), through-hole has been seted up in one of them first split shuttle (10), install compression gas circuit (11) in the through-hole, the one end and compression gas circuit (11) are linked together with compressed air chamber (8), the other end and compression gas circuit (11) are worn out and link to each other with the compressor through the external mold (2).
2. The extrusion and pressurized cooling die for an inner wall coating layer of a plastic steel wound pipe according to claim 1, wherein: the periphery of external mould (2) is equipped with first protruding edge (5) and second protruding edge (6), and the diameter of second protruding edge (6) is greater than the diameter of first protruding edge (5), and wherein second protruding edge (6) are located the front side of annular melt export (13).
3. The extrusion and pressurized cooling die for an inner wall coating layer of a plastic steel wound pipe according to claim 1, wherein: a cavity (12) is formed in one end of the inner die (1) extending out of the outer die (2), and the compression air chamber (8) is an annular air chamber wrapped on the periphery of the cavity (12).
4. The extrusion and pressurized cooling die for an inner wall coating layer of a plastic steel wound pipe according to claim 1, wherein: the annular melt channel (3) comprises an inclined equal-diameter channel (14), an axial large-diameter channel (15), an inclined variable-diameter channel (16), an axial small-diameter channel (17) and a radial equal-diameter channel (18) which are sequentially communicated, wherein the inclined equal-diameter channel (14) is communicated with the melt inlet (4), the radial equal-diameter channel (18) is communicated with the annular melt outlet (13), the first split shuttle (10) is positioned in the axial large-diameter channel (15), and the inner diameter of the inclined variable-diameter channel (16) close to one end of the axial large-diameter channel (15) is larger than that of the inclined variable-diameter channel (16) close to one end of the axial small-diameter channel (17).
5. The extrusion and compression cooling die for an inner wall coating of a plastic steel wound pipe according to claim 4, wherein: a plurality of second split shuttles (19) are circumferentially arranged in the axial small-diameter channel (17), the second split shuttles (19) are connected between the inner die (1) and the outer die (2), the distance between the second split shuttles (19) and the annular melt outlet (13) is L, L is 10-20cm, the first split shuttles (10) and the second split shuttles (19) are streamline in the length direction, and the two ends are tips with smaller diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321007428.XU CN219903247U (en) | 2023-04-25 | 2023-04-25 | Extrusion and pressurizing cooling die for inner wall coating layer of plastic steel winding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321007428.XU CN219903247U (en) | 2023-04-25 | 2023-04-25 | Extrusion and pressurizing cooling die for inner wall coating layer of plastic steel winding pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219903247U true CN219903247U (en) | 2023-10-27 |
Family
ID=88440336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321007428.XU Active CN219903247U (en) | 2023-04-25 | 2023-04-25 | Extrusion and pressurizing cooling die for inner wall coating layer of plastic steel winding pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219903247U (en) |
-
2023
- 2023-04-25 CN CN202321007428.XU patent/CN219903247U/en active Active
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