CN102717497A - Screw for injection molding machine - Google Patents
Screw for injection molding machine Download PDFInfo
- Publication number
- CN102717497A CN102717497A CN2012101923382A CN201210192338A CN102717497A CN 102717497 A CN102717497 A CN 102717497A CN 2012101923382 A CN2012101923382 A CN 2012101923382A CN 201210192338 A CN201210192338 A CN 201210192338A CN 102717497 A CN102717497 A CN 102717497A
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- section
- spiral grooves
- screw
- spiral
- screw rod
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a screw for an injection molding machine. The screw comprises a spiral fin and a round column, wherein the spiral fin extends along the axial direction of the round column and forms spiral grooves and spiral ribs with the round column. The screw is separated into a feed section, a compression section and a gauge section from feeding to discharging. The spiral grooves of the feed section are deeper than those of the compression section, the spiral grooves of the compression section gradually changes from deep to shallow, and the spiral grooves of the gauge section are shallower than those of the compression section and is kept constant. Since the spiral grooves of the compression section gradually changes from deep to shallow, the screw is provided with a suitable compression ratio, so that molten plastic is boosted in the spiral grooves, breakage of the plastic during a plasticizing process can be avoided, quality of a plastic product is improved, thickness of the spiral fin is increased, strength of the screw is enhanced, the screw during plastic boosting rotation process can be kept from twisting off, and service life of the screw is prolonged.
Description
Technical field
The present invention relates to a kind of injection machine accessory, relate in particular to a kind of injection machine and use screw rod.
Background technology
Mould is the indispensable part of product manufacturing industry, and the quality of a secondary mould design directly has influence on the quality of product.
Extensive use screw rod in injection machine, general screw rod is divided into feeding section, compression section and metering section, and feeding section is used to carry the bulk material that gets into the unfused polymer in the barrel from feed arrangement; The compression section is used for constantly plastics being compressed, and is mixing, shears, and accomplishes plastics from the transformation of solid to liquid; Metering section is used for extruding liquid homogenizing further to level pressure from screw head.
Yet the structure of general screw rod directly has influence on the quality of product, and compression ratio designs unreasonable meeting and causes in injection moulding process, occurring cutout; Sometimes the thickness low LCL of flight is big; When pan feeding, receive bigger active force at pan feeding section screw rod, be easy to twist off; In addition, the degree of depth of the spiral grooves of feeding section, compression section and metering section also has very big influence.
In view of this, be necessary the screw rod of injection machine in the prior art is improved, to address the above problem.
Summary of the invention
The object of the present invention is to provide a kind of injection machine to use screw rod.
For realizing the foregoing invention purpose; The invention provides a kind of injection machine and use screw rod; Comprise flight and cylinder; Said flight extends axially and forms spiral grooves and spiral shell rib with said cylinder along said cylinder, and said screw rod is divided into pan feeding section, compression section and metering section successively from being fed to discharging, and the degree of depth of the said compression section of spiral grooves depth ratio of said pan feeding section is big; The spiral grooves degree of depth of said compression section is by going deep into shallow gradual change, and the degree of depth of the said compression section of spiral grooves depth ratio of said metering section is little and remain unchanged.
As further improvement of the present invention, said screw rod also comprises mixing section, and an end and the spiral grooves in the said mixing section and spiral shell rib that said mixing section is arranged at said metering section evenly are intervally arranged.
As further improvement of the present invention, the thickness of said flight is 0.3 times of said cylinder external diameter.
Compared with prior art, the invention has the beneficial effects as follows: the present invention through with spiral grooves from the pan feeding section to metering section by shoaling deeply gradually, make screw rod obtain a proper compression ratio; Thereby the plastics that make fusion are accelerated to advance in spiral grooves; The assurance plastics cutout phenomenon occurs at the plasticizing process middle part, improve the quality of plastic product, and the thickness of increase flight has improved the intensity of screw rod; Avoid screw rod in rotating the process that advances plastics, to be twisted off, prolonged the service life of screw rod.
Description of drawings
Fig. 1 is the structural representation of a kind of injection machine of the present invention with screw rod;
Among the figure: 1 flight, 2 cylinders, 3 spiral grooves, 4 mixing sections, 5 metering sections, 6 compression sections, 7 pan feeding sections.
The specific embodiment
Below in conjunction with each embodiment shown in the drawings the present invention is elaborated; But should be noted that; These embodiments are not limitation of the present invention; The function that those of ordinary skills do according to these embodiments, method, or structural equivalent transformation or substitute all belong within protection scope of the present invention.
Please join shown in Figure 1; The invention provides a kind of injection machine and use screw rod; Comprise flight 1 and cylinder 2; Said flight 1 extends axially and forms spiral grooves 3 and spiral shell ribs with said cylinder 2 along said cylinder 2, and said screw rod is divided into pan feeding section 7, compression section 6, metering section 5 and mixing section 4 successively from being fed to discharging, and the degree of depth of the said compression section 6 of spiral grooves 3 depth ratios of said pan feeding section 7 is big; Thereby spiral grooves 3 degree of depth of said compression section 6 produce compression ratio by going deep into shallow gradual change; The compression ratio of screw rod is 2.5:1 among the present invention, and said screw rod can guarantee in plasticizing process, not occur cutout, packing phenomenon in this compression ratio range, and the quality of plastic product is provided.The degree of depth of the said compression section 6 of spiral grooves 3 depth ratios of said metering section 5 is little and remain unchanged.Said compression section 6 can be with the molten plastic compacting, for extruding the pressure that provides certain.The thickness of said flight 1 is 0.3 times of said cylinder 2 external diameters, has improved the intensity of screw rod.An end and the spiral grooves 3 in the said mixing section 4 and spiral shell rib that said mixing section 4 is arranged at said metering section evenly are intervally arranged.
The listed a series of detailed description of preceding text only is specifying to feasibility embodiment of the present invention; They are not in order to restriction protection scope of the present invention, allly do not break away from equivalent embodiment or the change that skill of the present invention spirit done and all should be included within protection scope of the present invention.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore; No matter from which point; All should regard embodiment as exemplary; And be nonrestrictive, scope of the present invention is limited accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the present invention.Should any Reference numeral in the claim be regarded as limit related claim.
In addition; Describing according to embodiment though should be appreciated that this specification, is not that each embodiment only comprises an independently technical scheme; This narrating mode of specification only is for clarity sake; Those skilled in the art should make specification as a whole, and the technical scheme among each embodiment also can form other embodiments that it will be appreciated by those skilled in the art that through appropriate combination.
Claims (3)
1. an injection machine is used screw rod; Comprise flight and cylinder; Said flight extends axially and forms spiral grooves and spiral shell rib with said cylinder along said cylinder, and said screw rod is divided into pan feeding section, compression section and metering section successively from being fed to discharging, it is characterized in that: the degree of depth of the said compression section of spiral grooves depth ratio of said pan feeding section is big; The spiral grooves degree of depth of said compression section is by going deep into shallow gradual change, and the degree of depth of the said compression section of spiral grooves depth ratio of said metering section is little and remain unchanged.
2. injection machine according to claim 1 is used screw rod, it is characterized in that: said screw rod also comprises mixing section, and an end and the spiral grooves in the said mixing section and spiral shell rib that said mixing section is arranged at said metering section evenly are intervally arranged.
3. injection machine according to claim 1 is used screw rod, it is characterized in that: the thickness of said flight is 0.3 times of said cylinder external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101923382A CN102717497A (en) | 2012-06-12 | 2012-06-12 | Screw for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101923382A CN102717497A (en) | 2012-06-12 | 2012-06-12 | Screw for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102717497A true CN102717497A (en) | 2012-10-10 |
Family
ID=46943434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101923382A Pending CN102717497A (en) | 2012-06-12 | 2012-06-12 | Screw for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102717497A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202079742U (en) * | 2011-05-26 | 2011-12-21 | 东莞泰星五金制品厂有限公司 | Screw for thermoplastic plastic injection molding machine |
| CN202592688U (en) * | 2012-06-12 | 2012-12-12 | 无锡天惠塑机有限公司 | Screw for injection molding machine |
-
2012
- 2012-06-12 CN CN2012101923382A patent/CN102717497A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202079742U (en) * | 2011-05-26 | 2011-12-21 | 东莞泰星五金制品厂有限公司 | Screw for thermoplastic plastic injection molding machine |
| CN202592688U (en) * | 2012-06-12 | 2012-12-12 | 无锡天惠塑机有限公司 | Screw for injection molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |