CN116901399A - Photovoltaic plastic conduit corner screw aircraft nose extrusion tooling - Google Patents
Photovoltaic plastic conduit corner screw aircraft nose extrusion tooling Download PDFInfo
- Publication number
- CN116901399A CN116901399A CN202311006419.3A CN202311006419A CN116901399A CN 116901399 A CN116901399 A CN 116901399A CN 202311006419 A CN202311006419 A CN 202311006419A CN 116901399 A CN116901399 A CN 116901399A
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- CN
- China
- Prior art keywords
- extrusion
- section
- die
- core
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 95
- 239000004033 plastic Substances 0.000 title claims abstract description 27
- 229920003023 plastic Polymers 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims description 59
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000004308 accommodation Effects 0.000 description 4
- 229920000426 Microplastic Polymers 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a photovoltaic plastic conduit corner screw machine head extrusion die, relates to the technical field of plastic product preparation, and solves the technical problem that a conical structure of a split support in the prior art can cause shrinkage marks on the surface of a produced conduit. The device comprises an inner mold core and an outer mold core, wherein the inner mold core comprises a conical section and a connecting disc, the conical section is fixedly connected with the connecting disc, the conical section stretches into the outer mold core, a material flow passage is arranged between the conical section and the outer mold core, and the connecting disc is connected with the end part of the outer mold core; and a spiral groove flow passage is arranged on the circumferential side wall of the conical section.
Description
Technical Field
The invention relates to the technical field of plastic product preparation devices, in particular to a photovoltaic plastic conduit corner screw machine head extrusion die.
Background
The thermoplastic extrusion die is used for producing high-corrosion heat-resistant plastic products, the thermoplastic extrusion die cooperates with an extruder to produce plastic products, the traditional extrusion die adopts a split-flow bracket, the split-flow bracket is used as an inner die core of the traditional extrusion die, the split-flow bracket is provided with a conical structure, a shrinkage mark can be reserved on the surface of a conduit produced by the traditional extrusion die, and the conduit is not smooth and has marks, so that defects exist in product quality.
Disclosure of Invention
The invention aims to provide a photovoltaic plastic conduit corner screw machine head extrusion dieThe device solves the technical problem that the conical structure of the shunt support in the prior art can cause the surface of the produced catheter to leave shrinkage marks 。 The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a photovoltaic plastic conduit corner screw machine head extrusion die which comprises an inner die core and an outer die core, wherein the inner die core comprises a conical section and a connecting disc, the conical section is fixedly connected with the connecting disc, the conical section stretches into the outer die core, a material flow channel is arranged between the conical section and the outer die core, and the connecting disc is connected with the end part of the outer die core;
and a spiral groove flow passage is arranged on the circumferential side wall of the conical section.
Optionally, the feeding die is connected with the side end of the outer die core, the first heating sleeve is sleeved on the feeding die and connected with the feeding die through a screw, and the feeding die is provided with a feeding runner which is communicated with the material runner.
Optionally, the feeding die comprises a first connecting section, a heating section, a second connecting section and a connecting sleeve, wherein the first connecting section, the heating section and the second connecting section are sequentially and fixedly connected, the connecting sleeve is sleeved on the second connecting section and is in threaded connection with the second connecting section, the first heating sleeve is sleeved on the heating section and is connected with the heating section through a screw;
the side end of the outer die core is provided with a threaded hole, and the first connecting section is in threaded connection with the threaded hole.
Optionally, the device further comprises a second heating sleeve, a third heating sleeve and a die cover, wherein the second heating sleeve is sleeved on the outer die core and connected with the outer die core through a screw, the die cover is connected with the other end of the outer die core, and the third heating sleeve is sleeved on the die cover and connected with the die cover through a screw.
Optionally, still include extrusion mold core and ejector pin, be provided with the connecting channel in the centre form core, be provided with in the mould lid and hold the passageway, extrude the mold core one part with the connecting channel is connected, extrude the mold core another part be located hold in the passageway just extrude the mold core with be provided with between the mould lid and extrude the runner, the one end of ejector pin stretches into in the connecting channel just the tip of ejector pin can butt extrude the mold core, the ejector pin with connecting channel threaded connection.
Optionally, the extrusion mold core comprises a matching section, a cone section and a cylinder section, wherein the matching section, the cone section and the cylinder section are sequentially and fixedly connected, the matching section is connected with the accommodating channel, and the cone section and the cylinder section are both positioned in the accommodating channel;
an annular matching groove is formed in the circumferential side wall of the matching section;
and a through channel is arranged in the extrusion mold core.
Optionally, the die cover includes extrusion outer core, extrusion cover, first spacing ring, second spacing ring and go-between, extrusion outer core is located extrusion cover is interior just extrusion outer core with extrusion cover is connected, first spacing ring with the other end of outer mold core is connected through the screw, just first spacing ring with the other end extrusion of outer mold core extrusion the tip of extrusion cover, extrusion outer core with be provided with the spread groove between the outer end of extrusion cover both, the second spacing ring is installed in the spread groove, the go-between overlaps extrusion cover is last just the go-between with extrusion cover is connected, third heating cover overlaps on the go-between just third heating cover with the go-between is connected through the screw.
The invention provides a photovoltaic plastic conduit corner screw machine head extrusion die, wherein a spiral groove flow channel is arranged on a conical section, and after materials enter the material flow channel, the materials flow along the spiral groove flow channel, so that the materials can flow from the material flow channel to the material flow channelThe length of the material flow channel is increased, the pressure maintaining time is further increased, the occurrence of shrinkage marks can be avoided, and the technical problem that the surface of a produced catheter can be left with shrinkage marks due to the conical structure of the split support in the prior art is solved 。
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a photovoltaic plastic conduit corner screw head extrusion die provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of an inner mold core of a photovoltaic plastic conduit corner screw head extrusion mold provided by an embodiment of the invention;
FIG. 3 is a cross-sectional view of an inner mold core of a photovoltaic plastic conduit corner screw head extrusion mold provided by an embodiment of the invention;
FIG. 4 is a cross-sectional view of the connection between the outer mold core of the extrusion mold of the corner screw head of the photovoltaic plastic conduit and the second heating jacket provided by the embodiment of the invention;
FIG. 5 is a cross-sectional view of a connection between a feeding die and a first heating jacket of a photovoltaic plastic conduit corner screw head extrusion die provided by an embodiment of the invention;
FIG. 6 is a cross-sectional view of a connection between a die cover and a third heating jacket of a photovoltaic plastic conduit corner screw head extrusion die provided by an embodiment of the invention;
FIG. 7 is a cross-sectional view of an extrusion die core of a photovoltaic plastic conduit corner screw die head extrusion die provided by an embodiment of the invention;
FIG. 8 is a cross-sectional view of a prior art shunt support;
1, an inner mold core; 11. a conical section; 111. spiral groove flow channel; 12. a connecting disc; 13. a connection channel;
2. an outer mold core; 21. a threaded hole; 22. an accommodation space;
3. a feeding die; 31. a first connection section; 32. a heating section; 33. a second connection section; 34. connecting sleeves; 35. a feeding runner;
4. a first heating jacket;
5. a second heating jacket;
6. a third heating jacket;
7. a mold cover; 71. extruding the outer core; 72. extruding a sleeve; 73. a first stop collar; 74. a second limiting ring; 75. a connecting ring; 76. a receiving channel;
8. an extrusion die core; 81. a mating section; 811. an annular mating groove; 82. a vertebral segment; 83. a cylindrical section; 84. a through passage;
9. and (5) a push rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
In the description of the present invention, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
The invention provides a photovoltaic plastic conduit corner screw machine head extrusion die which comprises an inner die core 1 and an outer die core 2, wherein the inner die core 1 comprises a conical section 11 and a connecting disc 12, the conical section 11 is fixedly connected with the connecting disc 12, the conical section 11 stretches into the outer die core 2, a material flow passage is arranged between the conical section 11 and the outer die core 2, an accommodating space 22 is arranged in the outer die core 2, the material flow passage is positioned in the accommodating space 22, the conical section 11 is positioned in the accommodating space 22, the connecting disc 12 is connected with the end part of the outer die core 2, and the connecting disc 12 is connected with the end part of the outer die core 2 through a screw;
the circumferential side wall of the conical section 11 is provided with a spiral groove flow channel 111. According to the extrusion die for the corner spiral machine head of the photovoltaic plastic conduit, the spiral groove flow channel 111 is arranged on the conical section 11, and materials flow along the spiral groove flow channel 111 after entering the material flow channel, so that the flow channel length of the materials is increased, the pressure maintaining time is further increased, shrinkage marks can be avoided, and the technical problem that the surface of a produced conduit is left with shrinkage marks due to the conical structure of the split support in the prior art is solved.
As an alternative embodiment, still include pay-off mould 3 and first heating jacket 4, pay-off mould 3 is connected with the side of outer mold core 2, and first heating jacket 4 cover is connected through the screw on pay-off mould 3 and first heating jacket 4 and pay-off mould 3, and pay-off mould 3 is provided with the pay-off runner 35, and the pay-off runner 35 is linked together with the material runner, and plastic granules are in the in-process of pay-off runner 35, and first heating jacket 4 can heat plastic granules for plastic granules melts to be liquid, and then enters into the material runner.
As an alternative embodiment, the feeding die 3 comprises a first connecting section 31, a heating section 32, a second connecting section 33 and a connecting sleeve 34, the first connecting section 31, the heating section 32 and the second connecting section 33 are sequentially and fixedly connected, the interiors of the first connecting section 31, the heating section 32 and the second connecting section 33 are communicated through a feeding runner 35, the connecting sleeve 34 is sleeved on the second connecting section 33, the connecting sleeve 34 is in threaded connection with the second connecting section 33, the first heating sleeve 4 is sleeved on the heating section 32, the first heating sleeve 4 is connected with the heating section 32 through screws, and the first heating sleeve 4 can heat the heating section 32;
the side of outer mold core 2 is provided with screw hole 21, and screw hole 21 is linked together with accommodation space 22, and first linkage segment 31 is located screw hole 21 and first linkage segment 31 and screw hole 21 threaded connection, and the screw of connecting connection pad 12 and outer mold core 2 will be connected with first linkage segment 31.
As an alternative embodiment, the mold further comprises a second heating sleeve 5, a third heating sleeve 6 and a mold cover 7, wherein the second heating sleeve 5 is sleeved on the outer mold core 2, the second heating sleeve 5 is connected with the outer mold core 2 through screws, the second heating sleeve 5 heats the outer mold core 2, so that materials entering into a material flow channel can be heated, the mold cover 7 is connected with the other end of the outer mold core 2, the third heating sleeve 6 is sleeved on the mold cover 7, the third heating sleeve 6 is connected with the mold cover 7 through screws, and the third heating sleeve 6 heats the mold cover 7, so that materials entering into the extrusion flow channel can be heated.
As an alternative embodiment, still include extrusion die core 8 and ejector pin 9, be provided with connecting channel 13 in the centre form core 1, be provided with in the die lid 7 and hold passageway 76, part and the connecting channel 13 of extrusion die core 8 are connected, another part of extrusion die core 8 is located and is held in passageway 76 and is provided with the extrusion runner between extrusion die core 8 and the die lid 7, the one end of ejector pin 9 stretches into in connecting channel 13 and the tip of ejector pin 9 can butt extrusion die core 8, ejector pin 9 and connecting channel 13 threaded connection, ejector pin 9 is in order to withstand extrusion die core 8, prevent extrusion die core 8 break away from. The material will pass through the feed channel 35, the material channel and the extrusion channel in sequence and finally enter the next process.
As an alternative embodiment, the extrusion die core 8 comprises a matching section 81, a cone section 82 and a cylindrical section 83, wherein the matching section 81, the cone section 82 and the cylindrical section 83 are sequentially and fixedly connected, the matching section 81 is connected with the accommodating channel 76, the cone section 82 and the cylindrical section 83 are both positioned in the accommodating channel 76, the large end part of the cone section 82 is fixedly connected with the matching section 81, and the small end part of the cone section 82 is fixedly connected with the cylindrical section 83;
an annular fitting groove 811 is formed in the circumferential side wall of the fitting section 81, and a sealing ring is placed in the annular fitting groove 811; a through passage 84 is provided in the extrusion die core 8.
As an alternative embodiment, the die cover 7 includes an extrusion outer core 71, an extrusion sleeve 72, a first stopper ring 73, a second stopper ring 74 and a connection ring 75, the extrusion outer core 71 is located in the extrusion sleeve 72 and the extrusion outer core 71 is connected with the extrusion sleeve 72, the first stopper ring 73 is connected with the other end of the outer die core 2 by a screw, and the first stopper ring 73 is pressed with the other end of the outer die core 2 by an end of the extrusion sleeve 72 to restrict the extrusion sleeve 72 from moving, a connection groove is provided between the outer ends of the extrusion outer core 71 and the extrusion sleeve 72, the second stopper ring 74 is installed in the connection groove to strengthen the connection of the extrusion outer core 71 and the extrusion sleeve 72, the connection ring 75 is sleeved on the extrusion sleeve 72 and the connection ring 75 is connected with the extrusion sleeve 72, the third heating sleeve 6 is sleeved on the connection ring 75 and the third heating sleeve 6 is connected with the connection ring 75 by a screw, and the third heating sleeve 6 is used to heat the connection ring 75. The interiors of the extrusion outer core 71 and the extrusion jacket 72 are communicated through the accommodation passage 76, the accommodation passage 76 includes a first tapered space, a second tapered space and a cylindrical space, the first tapered space, the second tapered space and the cylindrical space are sequentially communicated, the first tapered space is located in the extrusion jacket 72, the second tapered space and the cylindrical space are located in the extrusion outer core 71, the cone section 82 is located in the first tapered space and the second tapered space, and the cylindrical section 83 is located in the cylindrical space, so that the circular tube structure can be extruded.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The extrusion die of the photovoltaic plastic conduit corner screw machine head is characterized by comprising an inner die core (1) and an outer die core (2),
the inner die core (1) comprises a conical section (11) and a connecting disc (12), the conical section (11) is fixedly connected with the connecting disc (12), the conical section (11) stretches into the outer die core (2), a material flow passage is arranged between the conical section (11) and the outer die core (2), and the connecting disc (12) is connected with the end part of the outer die core (2);
a spiral groove flow passage (111) is arranged on the circumferential side wall of the conical section (11).
2. The photovoltaic plastic conduit corner screw head extrusion die of claim 1, further comprising a feeding die (3) and a first heating jacket (4), wherein the feeding die (3) is connected with the side end of the outer die core (2), the first heating jacket (4) is sleeved on the feeding die (3) and the first heating jacket (4) is connected with the feeding die (3) through a screw, the feeding die (3) is provided with a feeding runner (35), and the feeding runner (35) is communicated with the material runner.
3. The extrusion die of the photovoltaic plastic conduit corner screw machine head according to claim 2, wherein the feeding die (3) comprises a first connecting section (31), a heating section (32), a second connecting section (33) and a connecting sleeve (34), the first connecting section (31), the heating section (32) and the second connecting section (33) are sequentially and fixedly connected, the connecting sleeve (34) is sleeved on the second connecting section (33) and the connecting sleeve (34) is in threaded connection with the second connecting section (33), the first heating sleeve (4) is sleeved on the heating section (32) and the first heating sleeve (4) is connected with the heating section (32) through a screw;
the side end of the outer die core (2) is provided with a threaded hole (21), and the first connecting section (31) is in threaded connection with the threaded hole (21).
4. The extrusion die of the photovoltaic plastic conduit corner screw machine head according to claim 1, further comprising a second heating sleeve (5), a third heating sleeve (6) and a die cover (7), wherein the second heating sleeve (5) is sleeved on the outer die core (2) and the second heating sleeve (5) is connected with the outer die core (2) through a screw, the die cover (7) is connected with the other end of the outer die core (2), the third heating sleeve (6) is sleeved on the die cover (7) and the third heating sleeve (6) is connected with the die cover (7) through a screw.
5. The extrusion die for the photovoltaic plastic conduit corner screw machine head according to claim 4, further comprising an extrusion die core (8) and a push rod (9), wherein a connecting channel (13) is arranged in the inner die core (1), a containing channel (76) is arranged in the die cover (7), one part of the extrusion die core (8) is connected with the connecting channel (13), the other part of the extrusion die core (8) is positioned in the containing channel (76), an extrusion flow channel is arranged between the extrusion die core (8) and the die cover (7), one end of the push rod (9) extends into the connecting channel (13), and the end part of the push rod (9) can be abutted against the extrusion die core (8), and the push rod (9) is in threaded connection with the connecting channel (13).
6. The extrusion die of the photovoltaic plastic conduit corner screw head according to claim 5, characterized in that the extrusion die core (8) comprises a matching section (81), a cone section (82) and a cylinder section (83), wherein the matching section (81), the cone section (82) and the cylinder section (83) are sequentially and fixedly connected, the matching section (81) is connected with the containing channel (76), and the cone section (82) and the cylinder section (83) are both positioned in the containing channel (76);
an annular matching groove (811) is formed in the circumferential side wall of the matching section (81);
a through channel (84) is arranged in the extrusion die core (8).
7. The extrusion die of a photovoltaic plastic conduit corner screw head according to claim 4, wherein the die cover (7) comprises an extrusion outer core (71), an extrusion sleeve (72), a first limiting ring (73), a second limiting ring (74) and a connecting ring (75), wherein the extrusion outer core (71) is positioned in the extrusion sleeve (72) and the extrusion outer core (71) is connected with the extrusion sleeve (72), the other end of the first limiting ring (73) and the other end of the outer die core (2) are connected through screws, the first limiting ring (73) and the other end of the outer die core (2) are extruded by the end of the extrusion sleeve (72), a connecting groove is arranged between the outer ends of the extrusion outer core (71) and the extrusion sleeve (72), the second limiting ring (74) is installed in the connecting groove, the connecting ring (75) is sleeved on the extrusion sleeve (72) and the connecting ring (75) is connected with the extrusion sleeve (72), and the third limiting ring (73) and the third limiting ring (75) are connected with the heating ring (6) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311006419.3A CN116901399A (en) | 2023-08-10 | 2023-08-10 | Photovoltaic plastic conduit corner screw aircraft nose extrusion tooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311006419.3A CN116901399A (en) | 2023-08-10 | 2023-08-10 | Photovoltaic plastic conduit corner screw aircraft nose extrusion tooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116901399A true CN116901399A (en) | 2023-10-20 |
Family
ID=88358308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311006419.3A Pending CN116901399A (en) | 2023-08-10 | 2023-08-10 | Photovoltaic plastic conduit corner screw aircraft nose extrusion tooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116901399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549532A (en) * | 2023-12-09 | 2024-02-13 | 青岛新大成塑料机械有限公司 | Extruder head for extruder, extrusion equipment and replacement method thereof |
-
2023
- 2023-08-10 CN CN202311006419.3A patent/CN116901399A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549532A (en) * | 2023-12-09 | 2024-02-13 | 青岛新大成塑料机械有限公司 | Extruder head for extruder, extrusion equipment and replacement method thereof |
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