CN208197529U - A kind of bolt special of low density polyethylene (LDPE), linear polyethylene blown film extruder - Google Patents
A kind of bolt special of low density polyethylene (LDPE), linear polyethylene blown film extruder Download PDFInfo
- Publication number
- CN208197529U CN208197529U CN201820504418.XU CN201820504418U CN208197529U CN 208197529 U CN208197529 U CN 208197529U CN 201820504418 U CN201820504418 U CN 201820504418U CN 208197529 U CN208197529 U CN 208197529U
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- screw rod
- screw
- section
- spiral shell
- type compression
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- 229920001684 low density polyethylene Polymers 0.000 title claims abstract description 39
- 239000004702 low-density polyethylene Substances 0.000 title claims abstract description 39
- 239000004698 Polyethylene (PE) Substances 0.000 title claims abstract description 22
- -1 polyethylene Polymers 0.000 title claims abstract description 22
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims description 18
- 239000004033 plastic Substances 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 8
- 210000000282 Nails Anatomy 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010924 continuous production Methods 0.000 abstract description 2
- 101700078171 KNTC1 Proteins 0.000 description 10
- 239000007787 solid Substances 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002860 competitive Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Abstract
A kind of low density polyethylene (LDPE), the bolt special of linear polyethylene blown film extruder, including screw rod, screw rod is divided into feed zone from discharging is fed to along its length, divergence type compression section, first metering section, barrier screen, second metering section and mixing section, wherein feed zone, divergence type compression section, principal screw piece is equipped on the screw rod cylindrical surface of first metering section and the second metering section along its length, principal screw piece and screw rod form screw channel and main spiral shell rib, the main spiral shell rib of divergence type compression section is away from the main spiral shell rib for feed zone away from 1.15~1.25 times, divergence type compression section is equipped with secondary flight, the outer diameter of secondary flight is less than principal screw piece, draw ratio 29:1~31:1 of screw rod, screw diameter 90~φ of φ 200mm.The structure design of the utility model is reasonable, and material conveys unimpeded, the stability of increase continuous production quality in screw rod, can satisfy low density polyethylene (LDPE), the production needs that linear polyethylene blown film squeezes out.
Description
Technical field
The utility model belongs to processing of high molecular material field of mechanical technique, is related to a kind of screw-rod structure of extruder, especially
It is related to the bolt special of a kind of low density polyethylene (LDPE), linear polyethylene blown film extruder.
Background technique
Extruder is used to carry out a variety of particulate materials to be sufficiently mixed after extruding and export, and is used primarily in plastics or rubber system
Make field.Raw material heating is allowed to be run through in the case where pressurization with certain shapes in viscosity flow shape by extruder when work
Mouth mold, and become section and the similar non-individual body of Oral incision and then pass through cooling, with certain geometrical shape and ruler
Very little raw material becomes elastomeric state from viscous state, and last cooling and shaping is glassy state, obtains required product.
Low density polyethylene (LDPE), linear polyethylene blown film extruder refer to that low density polyethylene (LDPE), linear polyethylene material pass through
Extruder feed opening enters inside the cavity between screw rod and machine barrel, and the slant edge rotated by screw rod is in face of plastics generation and slant edge
The perpendicular thrust in face elapses forward plastics, during passage, due to the friction between plastics and screw rod, plastics and machine barrel
And interparticle friction, while heating outside machine barrel and gradually melting, the plastics of melting come out through die head die orifice, cold through vane
But, inflation coils into finished films through collapser, traction roller.Screw rod is the weight of low density polyethylene (LDPE), linear polyethylene inflation film manufacturing machine
Component is wanted, finished product sizing to the end is directly affected.If screw-rod structure is too simple or unreasonable, low density polyethylene will cause
Alkene, linear polyethylene film poor transparency, lackluster property, in uneven thickness, there is crystal point on surface, seriously reduces product quality, loses
Go competitive advantage.
Through looking into, " it is dedicated that one kind is packed for polyethylene film to the Chinese patent of existing Patent No. CN201120365466.3
Extruder screw ", including screw head, gear type homogenizing zone, screw-type homogenizing zone, mask segments, compression section, feeding section, assembly
Gear type homogenizing zone and screw thread homogenizing zone are replaced original single screw-type homogenizing zone, make polyethylene stream in homogenizing zone by section
Uniformly agitation occurs, to increase the fusing degree of stream；In addition, gear type homogenizing zone additionally aids the raising of interior pressure, borrow
This can guarantee that screw channel is filled and is compacted, and that improves stream stablizes output, add mask segments in the centre of homogenizing zone and compression section,
Melt can be separated with unfused solid, and melt can only be made to export to end.But the design of its screw rod is closed not enough
Reason can generate buildup phenomenon in compression section, and long-time buildup will lead to the excessive friction and screw rod and machine barrel of plastics and screw rod
Excessive friction, accelerate outer screw diameter abrasion, influence product quality, it is therefore desirable to develop that a kind of extrusion effect is good, product matter
Measure good and stable low density polyethylene (LDPE), linear polyethylene inflation film manufacturing machine bolt special.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of low density polyethylene for the above-mentioned state of the art
There is the bolt special of alkene, linear polyethylene blown film extruder reasonable in design, material unimpeded, extrusion is conveyed in screw rod
The characteristics of effect is good, good product quality.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of low density polyethylene (LDPE), linear poly-
The bolt special of ethylene blown film extruder, including screw rod, it is characterised in that: the screw rod from be fed to discharging along its length according to
It is secondary to be divided into feed zone, divergence type compression section, the first metering section, barrier screen, the second metering section and mixing section, wherein feed zone, point
Principal screw piece, principal screw are equipped on the screw rod cylindrical surface of release compression section, the first metering section and the second metering section along its length
Piece and screw rod form screw channel and main spiral shell rib, the main spiral shell rib of divergence type compression section away from the main spiral shell rib for feed zone away from 1.15~1.25
Times, it is additionally provided with one on divergence type compression section and plays the barrier action secondary flight that solid-state plastic cement and melt plastic cement is separated, it is secondary
The outer diameter of flight is less than principal screw piece, draw ratio 29:1~31:1 of screw rod, screw diameter 90~φ of φ 200mm.
As an improvement, the screw channel on divergence type compression section is divided into melt area screw channel and solid-state area spiral shell by the pair flight
Slot, the outer diameter that the plastic cement of melting crosses secondary flight enter melt area, and solid-state area screw channel width becomes narrow gradually, and spiral groove depth is gradually
It shoals, melt area screw channel width gradually broadens, and spiral groove depth etc. is deep.
As an improvement, equidistantly offering several longitudinal grooves on the screw rod cylindrical surface of the barrier screen, longitudinal groove is divided into
Feed well and two groups of blow tank, the alternate setting of two groups of longitudinal grooves, wherein the outlet of feed well is closed in axis direction, out
The entrance of hopper is closed in axis direction.
As an improvement, the major diameter of thread between the feed well and blow tank is less than screw diameter.
It improves again, the screw rod cylindrical surface of the mixing section is equipped with a row or several rows pin.
It improves again, the pin is 5~6 rows cylinder or rectangular pin.
Further, the main spiral shell rib on first metering section and the second metering section is away from consistent with feed zone.
Further, the draw ratio 30:1 of the screw rod, the main spiral shell rib of divergence type compression section away from the main spiral shell rib for feed zone away from
1:2 times.
Finally, the tail end of the mixing section is in cone.
Compared with the prior art, the advantages of the utility model are: the structure to screw rod is reasonably designed, using length
The screw rod of diameter ratio 30:1 guarantees that material being capable of abundant fusion plastification inside screw rod；Divergence type compression section is set, is compressed in separation
Secondary flight is set in section, improves melting rate；At divergence type compression section main spiral shell rib away from for the main spiral shell rib of feed zone away from 1.2 times,
Guarantee that material unimpeded can pass through in divergence type compression section；Barrier screen is set, material is made sufficiently to melt, mix；Mixing section is set,
So that generating shearing fever when melting material flows through, make not melt material plasticizing.There is the utility model reasonable in design, material to exist
Conveying is unimpeded in screw rod, squeezes out the feature that effect is good, product quality is high, avoids the buildup phenomenon of compression section, increases continuous production
The stability of quality makes the transparent non-crystal point of product, and glossy property, thickness is uniform, improves product quality, can meet low density polyethylene
The production that alkene, linear polyethylene blown film squeeze out needs.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As shown in Figure 1, the bolt special of a kind of low density polyethylene (LDPE), linear polyethylene blown film extruder, including screw rod 1,
Screw rod 1 from be fed to discharging be divided into along its length feed zone A, divergence type compression section B, the first metering section C, barrier screen D,
Second metering section E and mixing section F, the wherein spiral shell of feed zone A, divergence type compression section B, the first metering section C and the second metering section E
Principal screw piece 2 is equipped on 1 cylindrical surface of bar along its length, principal screw piece 2 and screw rod 1 form screw channel 2a and main spiral shell rib 2b, due to
The spiral shell rib that principal screw piece 2 is formed, so also known as main spiral shell rib, the spacing between adjacent main spiral shell rib, is main spiral shell rib away from divergence type pressure
The main spiral shell rib of contracting section B is away from 1.2 times away from L of main spiral shell rib that L1 is feed zone A, so that low density polyethylene (LDPE), linear polyethylene are in spiral shell
In 1 transmission process of bar, material unimpeded can pass through when reaching divergence type compression section B, guarantee 1 service life of screw rod, if separation
The main spiral shell rib of type compression section B away from L1 and the main spiral shell rib of feed zone A away from L as if, material can produce at the B of divergence type compression section
Raw buildup phenomenon, long-time buildup will lead to the excessive friction of plastics and screw rod 1 and the excessive friction of screw rod 1 and machine barrel, add
Fast 1 outer diameter of screw rod abrasion, influences product quality；It is additionally provided with one on the B of divergence type compression section and plays barrier action for solid-state plastic cement
Screw channel 2a on the B of divergence type compression section is divided into melt area screw channel by the separated secondary flight 3 with melt plastic cement, secondary flight 3
2d and solid-state area screw channel 2c, the outer diameter of secondary flight 3 are less than principal screw piece 2, the plastic cement of melting cross the outer diameter of secondary flight 3 into
Entering melt area, solid-state area screw channel 2c width becomes narrow gradually, and spiral groove depth gradually becomes shallower as, and melt area screw channel 2d width gradually broadens,
Spiral groove depth etc. is deep, makes low density polyethylene (LDPE), linear polyethylene plastics under 1 the inside molten condition of screw rod, solid containing not melting
It is melted when the short grained molten stream of body is to secondary 3 outer diameter of flight by high shear, improves melting rate；The screw rod of barrier screen D
Equidistantly offer several longitudinal grooves 5 on 1 cylindrical surface, longitudinal groove 5 divides for feed well 51 and 52 2 groups of blow tank, and two groups vertical
To the alternate setting of groove 5, wherein the outlet of feed well 51 is closed in axis direction, and the entrance of blow tank 52 is in axis direction
Be it is closed, the major diameter of thread between feed well and blow tank is smaller than 1 diameter of screw rod, and material has feed well to flow by smaller
Major diameter of thread enters blow tank, makes low density polyethylene (LDPE), linear polyethylene plastics under 1 the inside molten condition of screw rod, containing not
By shear action when the short grained molten stream of molten solids is to barrier screen, a large amount of mechanical energy becomes thermal energy, makes not melt solid
The melting of body little particle, mixing；Be respectively equipped with 6 row's pins 4 on 1 cylindrical surface of screw rod of mixing section F, pin 4 can be cylindrical or
Rectangular pin, the tail end of mixing section F is in cone, when melting material flows through mixing section F, generates shearing fever, can also make non-fusant
Material plasticizing；Main spiral shell rib on first metering section C and the second metering section E is consistent away from L away from L2 and the main spiral shell rib of feed zone A.In addition,
If the draw ratio of screw rod 1 is too small, low density polyethylene (LDPE), linear polyethylene inside screw rod 1 can not abundant fusion plastification,
Product is caused to have crystal point, draw ratio is excessive, then can excessively be plasticized, therefore the draw ratio of the screw rod 1 of the present embodiment is set as 30:1
Relatively rationally, with guarantee guarantee low density polyethylene (LDPE), linear polyethylene inside screw rod can abundant fusion plastification, concurrently set spiral shell
The diameter of bar 1 is 90~φ of φ 200mm.
The present embodiment is actually used, and is aloowed material is unimpeded when reaching divergence type compression section B to pass through, is guaranteed screw rod
1 service life, low density polyethylene (LDPE), linear polyethylene are able to carry out sufficient shear melting inside screw rod 1, keep product transparent
Non-crystal point, glossy property, thickness is uniform, improves product quality.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (9)
1. the bolt special of a kind of low density polyethylene (LDPE), linear polyethylene blown film extruder, including screw rod, it is characterised in that: institute
It states screw rod and is divided into feed zone, divergence type compression section, the first metering section, barrier screen, the along its length from discharging is fed to
Two metering sections and mixing section, wherein on the screw rod cylindrical surface of feed zone, divergence type compression section, the first metering section and the second metering section
Be equipped with principal screw piece along its length, principal screw piece and screw rod form screw channel and main spiral shell rib, the main spiral shell rib of divergence type compression section away from
For feed zone main spiral shell rib away from 1.15~1.25 times, be additionally provided on divergence type compression section one rise barrier action solid-state is moulded
Glue and the separated secondary flight of melt plastic cement, the outer diameter of secondary flight are less than principal screw piece, draw ratio 29:1~31:1 of screw rod,
Screw diameter 90~φ of φ 200mm.
2. bolt special according to claim 1, it is characterised in that: the pair flight is by the spiral shell on divergence type compression section
Slot is divided into melt area screw channel and solid-state area screw channel, and the outer diameter that the plastic cement of melting crosses secondary flight enters melt area, solid-state area
Screw channel width becomes narrow gradually, and spiral groove depth gradually becomes shallower as, and melt area screw channel width gradually broadens, and spiral groove depth etc. is deep.
3. bolt special according to claim 1, it is characterised in that: equidistantly opened up on the screw rod cylindrical surface of the barrier screen
There are several longitudinal grooves, longitudinal groove is divided into feed well and two groups of blow tank, the alternate setting of two groups of longitudinal grooves, wherein feed well
Outlet in axis direction be it is closed, the entrance of blow tank is closed in axis direction.
4. bolt special according to claim 3, it is characterised in that: the major diameter of thread between the feed well and blow tank
Less than screw diameter.
5. bolt special according to claim 1, it is characterised in that: the screw rod cylindrical surface of the mixing section is equipped with a row
Or a few row's pins.
6. bolt special according to claim 5, it is characterised in that: the pin is 5~6 rows cylinder or square pin
Nail.
7. according to claim 1 to bolt special described in 6 any claims, it is characterised in that: first metering section and
Main spiral shell rib on second metering section is away from consistent with feed zone.
8. according to claim 1 to bolt special described in 6 any claims, it is characterised in that: the draw ratio of the screw rod
30:1, the main spiral shell rib of divergence type compression section away from the main spiral shell rib for feed zone away from 1:2 times.
9. according to claim 1 to bolt special described in 6 any claims, it is characterised in that: the tail end of the mixing section
In cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820504418.XU CN208197529U (en) | 2018-04-10 | 2018-04-10 | A kind of bolt special of low density polyethylene (LDPE), linear polyethylene blown film extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820504418.XU CN208197529U (en) | 2018-04-10 | 2018-04-10 | A kind of bolt special of low density polyethylene (LDPE), linear polyethylene blown film extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208197529U true CN208197529U (en) | 2018-12-07 |
Family
ID=64526117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820504418.XU Active CN208197529U (en) | 2018-04-10 | 2018-04-10 | A kind of bolt special of low density polyethylene (LDPE), linear polyethylene blown film extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208197529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022122045A1 (en) * | 2020-12-10 | 2022-06-16 | 广东仕诚塑料机械有限公司 | Plastic extrusion device for multi-layer co-extrusion film |
-
2018
- 2018-04-10 CN CN201820504418.XU patent/CN208197529U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022122045A1 (en) * | 2020-12-10 | 2022-06-16 | 广东仕诚塑料机械有限公司 | Plastic extrusion device for multi-layer co-extrusion film |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |