CN210233891U - Injection screw for injection molding machine - Google Patents
Injection screw for injection molding machine Download PDFInfo
- Publication number
- CN210233891U CN210233891U CN201920581911.6U CN201920581911U CN210233891U CN 210233891 U CN210233891 U CN 210233891U CN 201920581911 U CN201920581911 U CN 201920581911U CN 210233891 U CN210233891 U CN 210233891U
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- Prior art keywords
- section
- screw
- gradual change
- homogenization
- feeding
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 15
- 238000002347 injection Methods 0.000 title claims description 4
- 239000007924 injection Substances 0.000 title claims description 4
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000002844 melting Methods 0.000 claims abstract description 45
- 230000008018 melting Effects 0.000 claims abstract description 45
- 230000008859 change Effects 0.000 claims abstract description 43
- 238000000265 homogenisation Methods 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 239000011295 pitch Substances 0.000 abstract description 28
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012768 molten material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010027146 Melanoderma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses an injection molding screw rod for injection molding machine, including reinforced section, melting section, homogenization section, the mixed section of extruding, account for screw rod body effective length ratio separately and be 4.2: 2.8: 1.5: 1.5, the feeding section along the feeding direction comprises a gradual feeding section with gradually reduced screw pitch and screw groove depth and an equidistant feeding section with unchanged screw pitch and screw groove depth; the melting section is designed with double screw edges and equal screw pitches, and the depth of the screw grooves of the melting section and the equidistant feeding section is the same; the homogenization section along the pay-off direction includes the preceding homogenization gradual change section that the pitch gradually becomes big, and the back homogenization gradual change section that the pitch gradually becomes little, the length ratio of preceding homogenization gradual change section and back homogenization gradual change section is between 1.2 to 1.4, the pitch difference of preceding homogenization gradual change section is greater than the pitch difference of back homogenization gradual change section, the barrel is close to back homogenization gradual change section position arrangement design exhaust hole before the homogenization gradual change section, its technical scheme main points do, have the even advantage of ejection of compact of material melting, can improve the finished product quality of moulding plastics simultaneously in order to improve production efficiency.
Description
Technical Field
The utility model relates to an injection molding machine accessory field, in particular to injection molding screw rod for injection molding machine.
Background
Among the prior art, application number is CN201020686340.1, discloses a spinning screw, extrudes the section by reinforced section, melting section, homogenization section, mixing in proper order and constitutes, is provided with the spiral shell arris on reinforced section, melting section, homogenization section, the screw length is compared for L: D ═ 29: 1 with the diameter of spiral shell arris, it has cylindric protruding nail to distribute on the periphery of section is extruded in mixing, the utility model discloses its advantage lies in: in the charging section: preheating, compacting and conveying the materials, and preparing for stably converting the materials from solid to liquid; and in the melting section: further compacting and plasticizing the material to uniformly convert the material from a solid state to a liquid state, wherein the solid and the liquid exist in the same period. A homogenizing section: the material can be further plasticized and homogenized: the quantitative, constant pressure and constant temperature extrusion is realized in the mixing extrusion section.
However, this utility model is heated inhomogeneously for the material dissolves the speed not fast, and the melting cycle of overlength time can be burnt the material because of screw rod barrel high temperature inner wall moreover, and the material that consequently appears extruding has black spot or bubble easily, influences the finished product quality of moulding plastics, so this current screw rod structure is waited for further improvement.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an injection molding screw rod for injection molding machine has the even and even advantage of ejection of compact of material melting, can improve the finished product quality of moulding plastics simultaneously in order to improve production efficiency.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides an injection molding screw for injection molding machine, is including all being provided with reinforced section, melting section, homogenization section, the mixed section of extruding of spiral arris, reinforced section, melting section, homogenization section and the mixed section of extruding account for screw body effective length ratio separately and are 4.2: 2.8: 1.5: 1.5, the feeding section along the feeding direction sequentially comprises a gradual feeding section with gradually reduced screw pitch and screw groove depth and an equidistant feeding section with unchanged screw pitch and screw groove depth; the melting section is designed to be double-screw-edge equal-pitch, and the depth of the screw grooves of the melting section and the equidistant feeding section is the same; the homogenizing section along the feeding direction comprises a front homogenizing gradual change section with gradually-increased screw pitch and a rear homogenizing gradual change section with gradually-decreased screw pitch, the length ratio of the front homogenizing gradual change section to the rear homogenizing gradual change section is 1.2-1.4, the screw pitch difference of the front homogenizing gradual change section is larger than that of the rear homogenizing gradual change section, and the machine barrel is provided with a design exhaust hole at the position of the front homogenizing gradual change section close to the rear homogenizing gradual change section; the mixing extrusion section includes reverse spiral shell arris section and equidistance ejection of compact section in proper order, reverse spiral shell arris section is located homogenization section one side, and the effective length ratio of equidistance ejection of compact section and reverse spiral shell arris section is 2.
On the basis of the design of the existing universal screw, firstly, the existing feeding section is divided into a gradual feeding section and an equidistant feeding section by improving the design of the existing feeding section, after the material enters the machine barrel from the feed opening of the machine barrel, the material moves to the screw head under the rotation of the screw, and during the feeding section, the material is preheated and compacted in a gradual feeding section with gradually reduced screw pitch and screw groove depth, then the materials enter the equidistant material feeding section, the compacted materials complete the pre-melting setting effect under the heating and tight extrusion of the equidistant material feeding section, then the pre-melting material really enters the melting section to be melted completely, and it is worth explaining that the melting section of the screw adopts a double-helix design, which can improve the efficiency of fully melting the material, therefore, the effective length of the melting section can be reduced, the retention time of the materials in the melting section is reduced, and the quality of the molten materials is improved so as to improve the qualification rate of finished products;
meanwhile, a front homogenizing gradual change section with gradually-increased screw pitch and a rear homogenizing gradual change section with gradually-decreased screw pitch are set, the machine barrel is matched with the set exhaust holes, the conditions of air bubbles and the like in the homogenizing process of the molten material can be reduced, and meanwhile, the reverse screw edge section at the front end of the mixing extrusion section is designed to reduce the air bubbles, so that the quality of the material is further improved, and the qualified rate of finished products is improved.
More preferably: the length ratio of the gradual feeding section to the equidistant feeding section is 3.5-4.
So set up, through design gradual change pay-off section and equidistance pay-off section length ratio for between 3.5 to 4, realize that the effective length of equidistance pay-off section is lower for the cycle of material premelting can not the overlength, really realizes the material premelting effect, can not cause the change of material inner structure and cause the not thorough problem of follow-up melting.
To sum up, the utility model discloses the beneficial effect who contrasts in prior art does: on the basis of the design of the existing universal screw, firstly, the existing feeding section is divided into a gradual feeding section and an equidistant feeding section by improving the design of the existing feeding section, after the material enters the machine barrel from the feed opening of the machine barrel, the material moves to the screw head under the rotation of the screw, and during the feeding section, the material is preheated and compacted in a gradual feeding section with gradually reduced screw pitch and screw groove depth, then the materials enter the equidistant material feeding section, the compacted materials complete the pre-melting setting effect under the heating and tight extrusion of the equidistant material feeding section, then the pre-melting material really enters the melting section to be melted completely, and it is worth explaining that the melting section of the screw adopts a double-helix design, which can improve the efficiency of fully melting the material, therefore, the effective length of the melting section can be reduced, the retention time of the materials in the melting section is reduced, and the quality of the molten materials is improved so as to improve the qualification rate of finished products;
meanwhile, a front homogenizing gradual change section with gradually-increased screw pitch and a rear homogenizing gradual change section with gradually-decreased screw pitch are set, the machine barrel is matched with the set exhaust holes, the conditions of air bubbles and the like in the homogenizing process of the molten material can be reduced, and meanwhile, the reverse screw edge section at the front end of the mixing extrusion section is designed to reduce the air bubbles, so that the quality of the material is further improved, and the qualified rate of finished products is improved.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Reference numerals: 1. a feeding section; 2. a melting section; 3. a homogenization section; 4. a mixing extrusion section; 5. A gradual feeding section; 6. equally spaced feeding sections; 7. a pre-homogenization transition; 8. post-homogenizing the transition section; 9. a reverse spiral rib section; 10. and (5) discharging sections at equal intervals.
Detailed Description
The following provides a more detailed description of the present invention with reference to the accompanying drawings.
The utility model provides an injection molding screw for injection molding machine, referring to fig. 1 and showing, including all being provided with reinforced section 1, melting section 2, homogenization section 3, the mixed section of extruding 4 of screw thread, reinforced section 1, melting section 2, homogenization section 3 and the mixed section of extruding 4 account for screw body effective length ratio respectively and are 4.2: 2.8: 1.5: 1.5.
the feeding section 1 along the feeding direction sequentially comprises a gradual change feeding section 5 with gradually reduced screw pitch and screw groove depth and an equidistant feeding section 6 with unchanged screw pitch and screw groove depth, and the length ratio of the gradual change feeding section 5 to the equidistant feeding section 6 is 3.5-4.
The melting section 2 is designed with double screw edges and equal screw pitches, and the depth of the screw grooves of the melting section 2 and the equidistant feeding section 6 is the same; the homogenizing section 3 along the feeding direction comprises a front homogenizing gradual change section 7 with gradually increasing screw pitch and a rear homogenizing gradual change section 8 with gradually decreasing screw pitch, the length ratio of the front homogenizing gradual change section 7 to the rear homogenizing gradual change section 8 is 1.2-1.4, the screw pitch difference of the front homogenizing gradual change section 7 is larger than that of the rear homogenizing gradual change section 8, the machine barrel is provided with an exhaust hole in a matching way at the position of the front homogenizing gradual change section 7 close to the rear homogenizing gradual change section 8,
the mixing extrusion section 4 comprises a reverse spiral rib section 9 and an equidistant discharge section 10 in sequence, the reverse spiral rib section 9 is positioned on one side of the homogenizing section 3, and the effective length ratio of the equidistant discharge section 10 to the reverse spiral rib section 9 is 2.
The working principle is as follows:
on the basis of the design of the existing general screw, firstly, the existing feeding section 1 is divided into a gradual feeding section 5 and an equidistant feeding section 6 by improving the design of the existing feeding section 1, after materials enter a machine barrel from a feed opening of the machine barrel, the materials can move towards the head of the screw under the rotation of the screw, the materials can be preheated and compacted in the gradual feeding section 5 with gradually reduced screw pitch and screw groove depth during the feeding section 1, then the materials enter the equidistant feeding section 6, the compacted materials complete the pre-melting setting effect under the tightly heated extrusion of the equidistant feeding section 6, then the pre-melting materials really enter the melting section 2 for complete melting, and it is worth explaining that the melting section 2 of the screw adopts the double-screw-flight design, the efficiency of fully completing the melting of the materials can be improved, thereby the effective length of the melting section 2 can be reduced, and the retention time of the materials in the melting section 2 can be reduced, the quality of the molten material is improved so as to improve the qualification rate of finished products;
meanwhile, a front homogenizing gradual change section 7 with gradually-increased screw pitch and a rear homogenizing gradual change section 8 with gradually-decreased screw pitch are set, the air exhaust holes are set in a machine barrel in a matched mode, the conditions that air bubbles exist in the homogenizing process of the molten materials can be reduced, meanwhile, the reverse spiral rib section 9 at the front end of the mixing extrusion section 4 is designed to reduce the existence of the air bubbles, and therefore the quality of the materials is further improved, and the qualified rate of finished products is improved.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (3)
1. The utility model provides an injection molding screw for injection molding machine, is including all being provided with reinforced section (1), melting section (2), homogenization section (3), mixing extrusion section (4) of spiral arris, characterized by: the feeding section (1), the melting section (2), the homogenizing section (3) and the mixing extrusion section (4) respectively account for 4.2 of the effective length ratio of the screw body: 2.8: 1.5: 1.5, the feeding section (1) along the feeding direction sequentially comprises a gradual-change feeding section (5) with gradually-changed screw pitch and screw groove depth and an equidistant feeding section (6) with unchanged screw pitch and screw groove depth; the melting section (2) is designed in a double-helix equal-pitch mode, and the depth of the screw grooves of the melting section (2) and the equidistant feeding section (6) is the same; the homogenizing section (3) along the feeding direction comprises a front homogenizing gradual change section (7) with gradually-increased screw pitch and a rear homogenizing gradual change section (8) with gradually-decreased screw pitch, the length ratio of the front homogenizing gradual change section (7) to the rear homogenizing gradual change section (8) is 1.2-1.4, the screw pitch difference of the front homogenizing gradual change section (7) is larger than that of the rear homogenizing gradual change section (8), and the air exhaust hole is designed in a matched manner at the position of the machine barrel, close to the rear homogenizing gradual change section (8), of the front homogenizing gradual change section (7).
2. The injection screw of claim 1, wherein: the length ratio of the gradual change feeding section (5) to the equidistant feeding section (6) is between 3.5 and 4.
3. The injection screw of claim 1, wherein: mixing extrusion section (4) includes reverse spiral shell arris section (9) and equidistance in proper order and goes out material section (10), reverse spiral shell arris section (9) are located homogenization section (3) one side, and the effective length ratio that the equidistance goes out material section (10) and reverse spiral shell arris section (9) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920581911.6U CN210233891U (en) | 2019-04-26 | 2019-04-26 | Injection screw for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920581911.6U CN210233891U (en) | 2019-04-26 | 2019-04-26 | Injection screw for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210233891U true CN210233891U (en) | 2020-04-03 |
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ID=69967740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920581911.6U Expired - Fee Related CN210233891U (en) | 2019-04-26 | 2019-04-26 | Injection screw for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210233891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166078A1 (en) * | 2021-02-03 | 2022-08-11 | 柏建国 | Feedstock melting mechanism of pelletizer |
-
2019
- 2019-04-26 CN CN201920581911.6U patent/CN210233891U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022166078A1 (en) * | 2021-02-03 | 2022-08-11 | 柏建国 | Feedstock melting mechanism of pelletizer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 |