CN113771334B - Refitting use method of foaming extrusion screw capable of adjusting melt pressure - Google Patents
Refitting use method of foaming extrusion screw capable of adjusting melt pressure Download PDFInfo
- Publication number
- CN113771334B CN113771334B CN202111095469.4A CN202111095469A CN113771334B CN 113771334 B CN113771334 B CN 113771334B CN 202111095469 A CN202111095469 A CN 202111095469A CN 113771334 B CN113771334 B CN 113771334B
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- Prior art keywords
- section
- extrusion
- pressure regulating
- pressure
- screw
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- 238000001125 extrusion Methods 0.000 title claims abstract description 70
- 238000005187 foaming Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 46
- 230000006835 compression Effects 0.000 claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000005498 polishing Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000012857 repacking Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000009420 retrofitting 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
- B29C48/525—Conical screws
-
- 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
- B29C48/92—Measuring, controlling or regulating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of parts of extrusion equipment, and discloses a foaming extrusion screw capable of adjusting melt pressure and a refitting use method thereof, comprising a screw body, wherein the screw body consists of a blanking compression section, a preplasticizing section, a compression plasticizing section, a compression extrusion section and a mixing section, and the mixing section comprises a flow dividing section, a pressure regulating part and a conical head; firstly, the pressure regulating part is arranged to effectively increase the material extrusion pressure of the screw, thereby realizing continuous extrusion production and avoiding waste of raw materials. Secondly, can repacking to screw rod pressure regulating portion according to different demands to this satisfies different required extrusion pressure magnitudes, makes the screw rod practicality higher.
Description
Technical Field
The invention relates to the technical field of extrusion equipment parts, in particular to a refitting use method of a foaming extrusion screw capable of adjusting melt pressure.
Background
The foaming extrusion screw is an important component for plasticizing and extruding materials by using an extruder, and the performance of the screw plays a decisive role in the quality of extruded products. The screw rods of the extruder are different in corresponding products to be produced, different screw rods are needed, the existing foaming extrusion screw rods generally comprise a blanking compression section, a preplasticizing section, a compression plasticizing section, a compression extrusion section and a mixing section, however, in actual production and processing, the existing screw rods do not have a pressure regulating structure, continuous foaming extrusion is influenced mostly because the extrusion pressure is too small, the output of the product is unstable, and continuous extrusion production cannot be realized; secondly, the extrusion pressure of the existing screw structure is not adjustable, the extrusion production requirement that the screw is applied to various environmental conditions cannot be achieved through simple modification of the screw, and the practicability is low.
Disclosure of Invention
According to the embodiment of the application, the problem that the extrusion pressure of the foaming extrusion screw is inconvenient to change in the prior art is solved by providing the refitting use method of the foaming extrusion screw with the adjustable melt pressure, so that the extrusion pressure of the foaming extrusion screw is convenient to adjust, and the production quality of the foaming sheet is improved.
In one aspect, the embodiment of the application provides a foaming extrusion screw capable of adjusting melt pressure, which comprises a screw body, wherein the screw body consists of a blanking compression section, a preplasticizing section, a compression plasticizing section, a compression extrusion section and a mixing section, and the mixing section comprises a flow dividing section, a pressure regulating part and a conical head;
The diversion section is formed by arranging a plurality of convex blocks which are arranged at intervals along the circumferential direction of the screw body; the pressure regulating part is positioned between the shunt section and the conical head; the pressure regulating part is a plurality of pressure regulating rings which are arranged at intervals along the length direction of the screw body.
Further, the pressure regulating ring is of a circular ring structure with an enclosed outer circle.
Further, the pressure regulating ring is of a circular ring structure with a plurality of notches formed in the outer side wall, the notches are arc-shaped openings, and the notches are uniformly distributed along the circumferential direction of the pressure regulating ring.
Further, the number of the pressure regulating rings is 1-3 along the length direction of the screw body.
In another aspect, the embodiment of the application provides a method for retrofitting a screw to a foaming extrusion screw for adjusting melt pressure, the method comprising the steps of: s1, obtaining and judging whether extrusion pressure is in a reasonable range when the screw is used for production and processing; s2, if the extrusion pressure is larger, opening the pressure regulating ring or further polishing a notch formed in the pressure regulating ring to enlarge the notch; and S3, if the extrusion pressure is smaller, welding and repairing the notch formed on the pressure regulating ring, so that the pressure regulating ring forms a closed ring-shaped structure without the notch.
The technical scheme provided by the embodiment of the application has at least the following technical effects or advantages:
1. Because the pressure regulating part is arranged at the end part of the screw body, the outlet pressure of the screw body can be improved, and the foaming multiplying power can be improved when materials are extruded, so that the existing process requirements are met, the problem that the outlet pressure of an extruder is inconvenient to adjust in the prior art is effectively solved, the outlet pressure of the existing extruder is conveniently adjusted, and the quality of foaming products is improved.
2. Because set up the breach on the lateral wall of pressure regulating ring, can be convenient for reduce the exit pressure of extruder, so can be according to different production needs, reequip the tip of foaming extrusion screw rod, and then can be convenient for adjust the extrusion pressure of foaming extrusion screw rod when using, effectively solved the foaming extrusion screw rod among the prior art when using, its extrusion pressure is inconvenient for carry out the problem of adjusting, and then realized being convenient for the foaming extrusion screw rod and reequiped for the foaming extrusion screw rod can adapt to the production demand when using.
Drawings
FIG. 1 is a schematic view showing the overall structure of a foaming extrusion screw in an embodiment of the present application;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a schematic view of a screw structure with a notch pressure regulating ring in an embodiment of the present application;
FIG. 4 is an enlarged schematic view at B in FIG. 3;
In the figure: 1. a screw body; 2. a blanking compression section; 21. a first thread segment; 3. a pre-plasticizing section; 31. a second thread segment; 4. compressing and plasticizing sections; 41. a third thread segment; 5. compressing the extrusion section; 51. a fourth thread segment; 6. a mixing section; 61. a bump; 62. a pressure regulating part; 621. a pressure regulating ring; 622. a notch; 63. a conical head.
Detailed Description
The application embodiment discloses a modified application method of a foaming extrusion screw capable of adjusting melt pressure, solves the technical problem that extrusion pressure is too small to cause continuous extrusion production in the prior art, and the existing screw is inconvenient to realize pressure regulation and control by simple modification, so that the requirement of different production equipment or production processes is met.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1, a foaming extrusion screw capable of adjusting melt pressure comprises a screw body 1 in a slender cone shape, wherein the large end of the screw body 1 is matched with the position of a feed inlet of an extrusion cylinder, and the small end of the screw body 1 is matched with the position of a discharge outlet of the extrusion cylinder. The screw body 1 consists of a blanking compression section 2, a preplasticizing section 3, a compression plasticizing section 4, a compression extrusion section 5 and a mixing section 6.
Guide threads are distributed on the blanking compression section 2, the preplasticizing section 3, the compression plasticizing section 4 and the compression extrusion section 5. The guiding screw thread of each section is sequentially named as a first screw thread section 21, a second screw thread section 31, a third screw thread section 41 and a fourth screw thread section 51 along the direction from the big end to the small end of the screw body 1, the screw pitches of each section are approximately equal to the first screw thread section 21, the third screw thread section 41, the fourth screw thread section 51 and the second screw thread section 31 in sequence, the blanking compression section 2 is used for blanking conveying and pushing materials, the pre-plasticizing section 3 performs preliminary plasticizing on the materials, the subsequent plasticizing quality is improved, the compression plasticizing section 4 performs further processing on the pre-plasticized materials, so that the internal stress of the materials is uniform, the compression extruding section 5 performs high-pressure quantitative output on the materials, the mixing section 6 plays a role of dispersing mixed melt, uniformly diffuses foaming agents in the materials, the proportion optimization of the lengths of each section can be realized, the foaming multiplying power is effectively improved, and the stable output of products is further improved.
Referring to fig. 2,3 and 4, the mixing section 6 includes a split section, a pressure regulating portion 62 and a conical head 63, the split section is formed by arranging a plurality of projections 61 arranged at intervals along the circumferential direction of the screw body 1, and the conical head 63 is fixedly connected to the end of the screw body 1 and is located at the end of the extrusion barrel. The pressure regulating part 62 is located between the split-flow section and the conical head 63, the pressure regulating part 62 is a plurality of pressure regulating rings 621 arranged at intervals along the length direction of the screw body 1, and 1-3 pressure regulating rings 621 are arranged along the length direction of the screw body 1, and in the embodiment of the application, the number of the pressure regulating rings 621 is preferably selected to be 2. The pressure regulating ring 621 is a ring structure with an outer circle closed and without a notch. In addition, the pressure-adjusting ring 621 may be a circular ring structure with a plurality of notches 622 on the outer side wall, wherein the notches 622 are arc-shaped openings, the plurality of notches 622 are uniformly arranged along the circumferential direction of the pressure-adjusting ring 621, and the number of the notches 622 is optimally 4-6. The ring width of the pressure-adjusting ring 621 depends on the size of the extrusion barrel and the screw body 1 and the foaming extrusion processing requirements. The pressure regulating portion 62 is arranged to enable materials to be stacked and extruded again, so that extrusion pressure is increased, continuous extrusion production is better achieved, the phenomenon that the materials cannot be extruded into products or cannot be continuously extruded due to too small pressure is avoided, loss of the materials is greatly reduced, and quality of extrusion production is improved.
Example two
Referring to fig. 1 to 4, on the other hand, the embodiment of the application also discloses a method for refitting and using the screw, which is applied to the screw of the first embodiment, and the specific refitting and using method is as follows:
Firstly, judging whether the extrusion pressure of the screw is in a reasonable range or not during production and processing according to production acquisition, and correspondingly modifying the pressure regulating part 62 of the screw if the extrusion pressure is larger or smaller;
When the extrusion pressure is judged to be larger, the pressure regulating ring 621 is opened, or the notch 622 formed on the pressure regulating ring 621 is polished, so that the notch 622 is further increased;
when the extrusion pressure is smaller, the notch on the pressure adjusting ring 621 is repaired, so that the pressure adjusting ring 621 forms a closed annular structure without notch or reduces the size of the notch.
Of course, it should be noted that the above modification method can be flexibly modified for the extrusion pressure of the screw under the practical environment, equipment and process requirements. And secondly, polishing and the like are carried out on the corresponding whole refitted repair position after refitting, and then the whole refitted repair position is put into extrusion production for use.
In summary, the modified use method of the foaming extrusion screw capable of adjusting the melt pressure provided by the embodiment of the application has the following advantages. Before refitting, because the pressure regulating part 62 is arranged, the extrusion pressure of materials is increased relative to the screw rod in the prior art, continuous extrusion production is better realized, the phenomenon that extrusion cannot be performed or continuous extrusion production cannot be performed due to insufficient pressure is avoided, and waste of raw materials is avoided. In actual use, extrusion pressures required by different environments, equipment and process requirements are different, so that the screw can be modified and then used, in particular, the pressure regulating ring 621 of the pressure regulating part 62 is opened or welded, thereby realizing the regulation of the extrusion pressure.
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be able to apply equivalents and modifications according to the technical scheme and the concept of the present application within the scope of the present application.
Claims (1)
1. The modified use method of the foaming extrusion screw capable of adjusting the melt pressure comprises a screw body (1), wherein the screw body (1) consists of a blanking compression section (2), a preplasticizing section (3), a compression plasticizing section (4), a compression extrusion section (5) and a mixing section (6), and is characterized in that the mixing section (6) comprises a flow dividing section, a pressure regulating part (62) and a conical head (63);
the diversion section is formed by arranging a plurality of convex blocks (61) which are arranged at intervals along the circumferential direction of the screw body (1); the pressure regulating part (62) is positioned between the flow dividing section and the conical head (63); the pressure regulating parts (62) are a plurality of pressure regulating rings (621) which are arranged at intervals along the length direction of the screw body (1), and 1-3 pressure regulating rings (621) are arranged along the length direction of the screw body (1);
The pressure regulating ring (621) is of a circular ring structure with an outer circle closed and/or a circular ring structure with a plurality of notches (622) formed in the outer side wall, the notches (622) are arc-shaped openings, and the notches (622) are uniformly distributed along the circumferential direction of the pressure regulating ring (621);
The refitting use method of the screw rod comprises the following steps:
s1, acquiring and judging whether extrusion pressure is in a reasonable range when a screw is used for production and processing;
s2, if the extrusion pressure is larger, opening the pressure regulating ring (621) or further polishing a notch (622) formed in the pressure regulating ring (621) to enlarge the notch (622);
And S3, if the extrusion pressure is smaller, welding and repairing a notch formed in the pressure regulating ring (621) so that the pressure regulating ring (621) forms a closed annular structure without the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095469.4A CN113771334B (en) | 2021-09-17 | 2021-09-17 | Refitting use method of foaming extrusion screw capable of adjusting melt pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111095469.4A CN113771334B (en) | 2021-09-17 | 2021-09-17 | Refitting use method of foaming extrusion screw capable of adjusting melt pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113771334A CN113771334A (en) | 2021-12-10 |
| CN113771334B true CN113771334B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111095469.4A Active CN113771334B (en) | 2021-09-17 | 2021-09-17 | Refitting use method of foaming extrusion screw capable of adjusting melt pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN113771334B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203863989U (en) * | 2014-04-29 | 2014-10-08 | 杭州诺通实业有限公司 | Plastic extruding machine screw device |
| JP6687271B1 (en) * | 2019-03-25 | 2020-04-22 | 株式会社カツロン | Foam resin extrusion equipment |
| CN212171264U (en) * | 2019-11-29 | 2020-12-18 | 江苏荣胜长江塑业有限公司 | Mixing screw of PP plate extruder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0490360B1 (en) * | 1990-12-14 | 1994-07-13 | HERMANN BERSTORFF Maschinenbau GmbH | Method and extruder for the processing and the manufacture of rubber and plastic materials |
| CN102514162A (en) * | 2011-12-08 | 2012-06-27 | 浙江华业塑料机械有限公司 | Screw used for injection machine |
| CN203973988U (en) * | 2014-08-11 | 2014-12-03 | 宁波威瑞精密机械有限公司 | Screw rod for injection machine |
| CN208664341U (en) * | 2018-06-29 | 2019-03-29 | 山东守正农膜制造有限公司 | The anti-skidding strong plasticized screw of blow moulding machine high yield |
-
2021
- 2021-09-17 CN CN202111095469.4A patent/CN113771334B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203863989U (en) * | 2014-04-29 | 2014-10-08 | 杭州诺通实业有限公司 | Plastic extruding machine screw device |
| JP6687271B1 (en) * | 2019-03-25 | 2020-04-22 | 株式会社カツロン | Foam resin extrusion equipment |
| CN212171264U (en) * | 2019-11-29 | 2020-12-18 | 江苏荣胜长江塑业有限公司 | Mixing screw of PP plate extruder |
Also Published As
| Publication number | Publication date |
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| CN113771334A (en) | 2021-12-10 |
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