CN107877821A - The extrusion screw rod of plastic extruder - Google Patents
The extrusion screw rod of plastic extruder Download PDFInfo
- Publication number
- CN107877821A CN107877821A CN201710949269.8A CN201710949269A CN107877821A CN 107877821 A CN107877821 A CN 107877821A CN 201710949269 A CN201710949269 A CN 201710949269A CN 107877821 A CN107877821 A CN 107877821A
- Authority
- CN
- China
- Prior art keywords
- screw rod
- thread
- extrusion
- screw
- shank
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 76
- 229920003023 plastic Polymers 0.000 title claims abstract description 76
- 238000001125 extrusion Methods 0.000 title claims abstract description 70
- 238000010276 construction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 description 38
- 238000007599 discharging Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 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
- B29C48/51—Screws with internal flow passages, e.g. for molten material
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/445—Coaxially arranged screws, i.e. one within the other
-
- 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
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
-
- 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
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- 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
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
-
- 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
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
Abstract
The present invention discloses a kind of extrusion screw rod of plastic extruder, including external screw rod and inner screw, external screw rod includes the first threaded shank and the first shank, first shank is power input shaft, in this case, by being arranged inner screw in outer inside screw, and external screw rod is dynamic screw rod, inner screw is to determine screw rod, the plastics on the outside of external screw rod are enabled just to enter extrusion manifold after melting completely, therefore, plasticizing effect of the plastics in machine barrel is more preferable, by in being coaxially disposed, the structure of external screw rod, so that plastics can remove extrusion manifold after complete melting along the second screw thread of inner screw, compared to prior art, the extrusion screw rod extrusion efficiency of this case is higher.
Description
Technical field
The present invention relates to plastic extruder apparatus field, more particularly to a kind of extrusion screw rod of plastic extruder.
Background technology
In the prior art, generally plastic extruder is improved by improving the efficient conveying of extrusion screw rod with plasticizing quality
Yield and extrusion quality.In this case, the thread forms generally to extrusion screw rod, kneading form, draw ratio, revolution etc. are done
Go out to change to reach above-mentioned purpose.During above-mentioned purpose is reached, extrusion screw rod, which runs into, to be disadvantageous in that：One：Greatly
The requirement on machining accuracy of the screw rod of draw ratio is higher, therefore manufacturing cost is higher, and the screw rod of big L/D ratio is provided with abnormity more and is kneaded
Section, this section had not only wasted draw ratio but also had improved difficulty of processing, but if extrusion screw rod machining accuracy is not high, plastics can be produced
Raw excessive shear, generates extra shear heat, destroys plastics inner strand, causes plastics to be decomposed, and then influences extrusion
Quality；Two：In the extrusion of plastic extruder, due to extrusion screw rod under the environment such as high temperature, strong wear, high pulling torque work
Make, therefore the heat treatment level requirement of the material to extrusion screw rod in itself is higher；3rd, extrusion screw rod length generally can not be long,
Because not only floor space is larger for longer extrusion screw rod, and needs to provide larger torsion and could drive its rotation, therefore,
The motor of relatively high power is just needed, so, necessarily causes the energy consumption of plastic extruder excessive, is unfavorable for energy-saving and emission-reduction.
The content of the invention
In order to solve the above-mentioned technical problem, it is an object of the invention to provide one kind can improve transfer efficiency and plasticizing quality
Extrusion screw rod.
In order to realize the purpose of foregoing invention, the present invention adopts the following technical scheme that：
A kind of extrusion screw rod of plastic extruder, including external screw rod and inner screw, described external screw rod are dynamic screw rod, and described is interior
Screw rod is determines screw rod, and described external screw rod includes the first threaded shank and the first shank, and the first described shank is power input shaft,
The first described threaded shank has the internal leading portion for hollow structure, and described inner screw is coaxially set in the first described screw rod
In the leading portion in portion, extruded stock is formed between the leading portion inner surface of the first described threaded shank and the outer surface of described inner screw
Road, the first described threaded shank has the first main thread and the first deputy thread along the circumferentially extending of described external screw rod, described
External screw rod the first major and minor screw thread setting alternating with each other, form helical groove between adjacent the first described major and minor screw thread,
The bottom of described helical groove is provided with multiple through holes of the described extrusion manifold of connection, and described inner screw includes the second spiral shell
Bar portion and the second shank, the second described shank are rotatably arranged at the inside of the first described threaded shank, the second described spiral shell
Bar portion has the second screw thread along the circumferentially extending of described inner screw, the thread rotary orientation of the second described screw thread and described the
The thread rotary orientation of one main thread is opposite.
In above-mentioned technical proposal, it is preferred that described helical groove forms sieve-like kerve.
In above-mentioned technical proposal, it is preferred that the pitch of the first described deputy thread is more than the spiral shell of the first described main thread
Away from.
In above-mentioned technical proposal, it is preferred that the groove width of described helical groove is along described external screw rod axially from backward
Before become larger.
In above-mentioned technical proposal, it is preferred that the length of the first described main thread is more than the length of the first described deputy thread
Degree.
In above-mentioned technical proposal, it is preferred that the length of the first described main thread be described outer screw diameter 19 to
20 times.
In above-mentioned technical proposal, it is preferred that the length of the second described screw thread is the 14 to 15 of described inner screw diameter
Times.
In above-mentioned technical proposal, it is preferred that the height of thread of the first described deputy thread is less than the first described main thread
Height of thread.
In above-mentioned technical proposal, it is preferred that the first described threaded shank has the internal back segment for solid construction, described
The length ratio of back segment and described leading portion is 0.8~1.2.
The present invention obtains following beneficial effect compared with prior art：In this case, by being arranged interior spiral shell in outer inside screw
Bar, and external screw rod is dynamic screw rod, and inner screw is to determine screw rod so that after the plastics on the outside of external screw rod can melt completely
Just enter extrusion manifold, therefore, plasticizing effect of the plastics in machine barrel is more preferable, by being coaxially disposed the structure of inside and outside screw rod, makes
Plastics can remove extrusion manifold after complete melting along the second screw thread of inner screw, compared to prior art, this case
Extrusion screw rod extrusion efficiency is higher.
Brief description of the drawings
Accompanying drawing 1 is the main view schematic cross-sectional view of the plastic extruder of the present invention；
Accompanying drawing 2 is the close-up schematic view A of accompanying drawing 1；
Accompanying drawing 3 is the main view schematic cross-sectional view of the extrusion screw rod of the present invention；
Accompanying drawing 4 is the close-up schematic view B of accompanying drawing 3；
Accompanying drawing 5 is the schematic front view of the external screw rod of the present invention；
Accompanying drawing 6 is the close-up schematic view C of accompanying drawing 5;
Accompanying drawing 7 is the close-up schematic view D of accompanying drawing 5；
Accompanying drawing 8 is the scheme of installation of the inner screw of the present invention；
Accompanying drawing 9 is the schematic front view of the shunting disk of the present invention；
Accompanying drawing 10 is the scheme of installation of the part flow arrangement of the present invention；
Wherein：100th, plastic extruder；1st, extruder barrel；11st, spout；12nd, material road is heated；13rd, discharging opening；14th, heater；
141st, heating blower；2nd, extrusion die；21st, heart mould；22nd, passage is extruded；3rd, external screw rod；31st, the first threaded shank；311st, leading portion；
312nd, back segment；313rd, positioning hole；3131st, step surface；32nd, the first shank；321st, the first shank threads；33rd, extrusion manifold；34、
First screw thread；341st, the first main thread；342nd, the first deputy thread；35th, helical groove；351st, through hole；36th, thrust bearing；37th, carry on the back
Press screw thread；4th, inner screw；41st, the second threaded shank；42nd, the second shank；421st, the second shank threads；43rd, the second screw thread；5th, drive
Device；6th, part flow arrangement；61st, shunting disk；62nd, spreader；63rd, muscle is shunted；64th, tap hole；65th, centre bore；7th, slope thrust
Set；71st, thrust portion.
Embodiment
To describe technology contents, construction feature, institute's reached purpose and effect of invention in detail, below in conjunction with embodiment simultaneously
Accompanying drawing is coordinated to be described in detail.Wherein, the "front", "rear" being previously mentioned in the present embodiment is respectively left and right shown in accompanying drawing 1
Direction, " axial direction " are the direction extended along external screw rod/inner screw/extruder barrel or so shown in accompanying drawing 1, and " circumference " is accompanying drawing
Shown in 1 around the direction of external screw rod/inner screw/extruder barrel outer circumference, " radial direction " is along outer spiral shell shown in accompanying drawing 1
The direction of the radius extension of the section circle of bar/inner screw/extruder barrel.
Plastic extruder 100 as shown in Figure 1, it includes the extruder barrel 1 of a long tubular, the inside of extruder barrel 1
For hollow structure and heating material road 12 is formed, the leading section of extruder barrel 1 is squeezed to connect the discharging opening 13 of the heating material road 12
Go out above the rear lateral portion of machine barrel 1 and feeding seat is installed, the spout 11 for connecting the heating material road 12 is offered on feeding seat, because
This, can be to plastic raw materials be supplied inside machine barrel 1 by spout 11, and the plastic raw materials entered from spout 11 will enter heating
Material road 12 heats.It is provided with the outer surface of extruder barrel 1 for multiple heaters 14 to the heat supply of extruder barrel 1, these add
Hot device 14 is uniformly arranged, and each heater 14 connects a heating blower 141 so that extruder barrel 1 can pass through these heating
Device 14 come obtain outside thermal source, advantage of this is that：It can be fully absorbed into the plastic raw materials inside extruder barrel 1 crowded
The thermal source gone out outside machine barrel 1, is preheated, and is advantageous to the melting and plasticizing of plastic raw materials.
The leading section of extruder barrel 1 is being provided with extrusion die 2, extrusion die 2 and extruder barrel 1 at discharging opening 13
Directly plug into, and be fastened by bolts, hollow structure is in the inside of extrusion die 2 and is coaxially installed with core 21, extrudes mould
The inside of tool 2 has extrusion passage 22, and the shunting for molten plastic to be shunted is installed with the discharging opening 13 of extruder barrel 1
Device 6, the part flow arrangement 6 include being fixed on the shunting disk 61 of the rearward end of heart mould 21, being fixed on the shunting of the rearward end of shunting disk 61
Cone 62.
What the inside of extruder barrel 1 rotated coaxially be provided with external screw rod 3, external screw rod 3 are in elongated rod shape, the appearance of external screw rod 3
The first screw thread 34 is provided with face, the part with first screw thread 34 forms the first threaded shank 31, without first screw thread
34 remainder forms the first shank 32.The rear lateral portion of extruder barrel 1 is provided with drive device 5, the first shank 32 and driving
The phase of device 5 is connected, therefore, same on the first shank 32 in order to avoid axial float occurs in high-speed rotation for external screw rod 3
Axle sleeve is provided with thrust bearing 36.The leading portion of first threaded shank 31 is hollow structure, and the leading portion of this hollow structure is internally formed extrusion
Material road 33, there is the axially extending helical groove 35 along external screw rod 3 on the outer surface of the first threaded shank 31, helical groove 35
Bottom offers the multiple through holes 351 for connecting the extrusion manifold 33, and the plastic raw materials of melting can be entered by these through holes 351 to be squeezed
In discharging channel 33.Inner screw 4, leading section and the spreader 62 of inner screw 4 are coaxially installed with inside the leading portion of first threaded shank 31
Rearward end be fixedly connected, the inside for the first threaded shank 31 for being arranged on external screw rod 3 that the rearward end of inner screw 4 relatively rotates
（I.e. in 3 high-speed rotation of external screw rod, inner screw 4 keeps geo-stationary, that is to say, that external screw rod 3 is dynamic screw rod, and inner screw 4 is
Determine screw rod）, the second screw thread 43, and the rotation direction of the second screw thread 43 and the first screw thread 34 are provided with the outer surface of inner screw 4
It is oppositely oriented, so set be because：Due to the high-speed rotation of external screw rod 3 and plastic raw materials also concomitant rotation is driven, due to interior
Screw rod 4 is static, and the plastic raw materials of motion will move along the bearing of trend of the second screw thread 43 on inner screw 4.Institute in accompanying drawing 1
The course of work of the plastic extruder 100 shown is as follows：The plastic raw materials entered by spout 11 are introduced into inside extruder barrel 1
Heat in material road 12 and preheat, the high-speed rotation of external screw rod 3 and promote plastic raw materials to move forward（I.e. towards the direction of discharging opening 13
It is mobile）, external screw rod 3 produces shear heat in high-speed rotation to plastic raw materials, therefore plastic raw materials are in external heat source and external screw rod 3
Shear heat double action under, while move forward, on one side melt, after plastic raw materials completely melt after, plastic raw materials from
Through hole 351 on external screw rod 3 enters in the extrusion manifold 33 inside external screw rod 3, and product is formed finally by extrusion die 2.This
Process can lift the plasticizing effect of plastic raw materials, and the plastic raw materials not yet melted will be unable to be directly entered in extrusion manifold 33,
Until plastic raw materials melt completely.Advantage of this is that：First, plastic raw materials are avoided in 1 internal stops time of extruder barrel mistake
It is long, because plastic raw materials absorb external heat source for a long time and the shear heat of external screw rod is easily decomposed, influence plastics
The plasticizing quality of extruder；2nd, enter after plastic raw materials melting in extrusion manifold 33, improve the extrusion effect of plastic extruder
Rate.
As shown in Figure 2, external screw rod 3 is coaxially set in extruder barrel 1 and in heating material road 12, external screw rod 3
The first threaded shank 31 on be provided with the first screw thread 34, the first screw thread 34 includes the first main thread 341 and the first deputy thread 342,
Helical groove 35 is formd between the first adjacent major and minor screw thread, the bottom even of helical groove 35 is provided with multiple through holes
351.The leading portion of first threaded shank 31 of external screw rod 3 is hollow structure and forms extrusion manifold 33, and inner screw 4 is located at the extrusion
In material road 33, these above-mentioned through holes 351 are connected with the extrusion manifold 33 so that inner surface, outer spiral shell positioned at extruder barrel 1
The plastic raw materials of melting between the outer surface of bar 3 can be entered in extrusion manifold 33 by these through holes 351.
As shown in Figure 3, external screw rod 3 is coaxially set in extruder barrel 1, and external screw rod 3 includes the first threaded shank 31 and the
One shank 32, the first shank 32 are power input shaft and are connected with drive device 5.The inside leading portion of first threaded shank 31 is
Hollow structure, the coaxial leading portion 311 for being set in the first threaded shank 31 of inner screw 4 is interior and the rearward end of external screw rod 3 can be relative
Inner screw 4 rotates, and the first threaded shank 31 has the first screw thread 34, and the first screw thread 34 includes the along the circumferentially extending of external screw rod 3
One main thread 341 and the first deputy thread 342, the first major and minor screw thread setting alternating with each other, shape between adjacent first major and minor screw thread
Into helical groove 35, the groove width of helical groove 35 becomes larger from back to front along the axial direction of external screw rod 3, advantage of this is that：
Groove width due to helical groove 35 is becoming increasing close at discharging opening 12, therefore, positioned at the logical of the bottom of helical groove 35
The quantity in hole 351 is also more and more, and plastic raw materials are in the case where the rotation of external screw rod 3 drives towards movement at discharging opening 13, great Liang Rong
The plastic raw materials melted are entered in extrusion manifold 12 when close to discharging opening 13 by these through holes 351, this using inside and outside screw rod
The structure being coaxially arranged not only make it that the plasticizing effect of plastic raw materials is more preferable, and the extrusion efficiency of plastic extruder is also higher.
As shown in Figure 4, the leading portion of the first threaded shank 31 of external screw rod 3 is internally formed extrusion manifold 33 and inner screw 4
In the extrusion manifold 33, the rearward end of inner screw 4 is the second shank 42, to have avoided least a portion of plastic raw materials to second
Moved at shank 42,（Because have between the inner surface of the outer surface of the second shank 42 and the first threaded shank 31 a small amount of
During plastic raw materials, the mechanical friction between the outer surface of the second shank 42 and the internal face of the first threaded shank 31 can be only increased, is entered
And aggravate the abrasion of inner screw 4）Therefore less second shank threads of one section of pitch are provided with the front side of the second shank 42
421, second shank threads 421 can not only exclude the unnecessary steam and impurity in the inside of external screw rod 3, additionally it is possible to reduce inner screw
Caused abrasion between 4 outer surface and the internal face of external screw rod 3, and then protect inner screw 4；Coaxially fixed on second shank 42
Slope thrust set 7 is arranged with, the axially arranged of the interior edge external screw rod 3 of leading portion 311 of the first threaded shank 31 has positioning hole 313, slided
Thrust sleeve 7 is located in the positioning hole 313, and positioning hole 313 has the step surface 3131 radially extended, and slope thrust set 7 has
External diameter becomes big thrust portion 71, and thrust portion 71 is pushed against on step surface 3131, due to the high-speed rotation of external screw rod 3, the second shank
Rolling friction occurs for 42 outer surface and the inner surface of the first threaded shank 31, in order to avoid crossing thermal friction between inside and outside screw rod,
Therefore, slope thrust set 7 uses the material using high-tensile strength brass as matrix, wherein, the chemical formula of high-tensile strength brass is
CuZn25Al6Mn4.Further, since the outer surface of slope thrust set 7 bears substantial amounts of frictional heat, therefore can be pushed away in slip
Groove is opened up on the outer surface of power set 7, and high-quality graphite is inlayed in this groove, 7 appearance can also be covered in slope thrust
Face overlying last layer graphite linings, advantage of this is that：Because slope thrust set 7 plays the effect similar with bearing here,
But compared to traditional bearing, its have general bearing institute without the advantages of be：One is due to the appearance of slope thrust set 7
Face is covered with graphite, therefore slope thrust set 7 need not add lubricating oil and self-lubricating can be achieved, the two, due to slope thrust set 7
The high temperature resistant of material itself, anti abrasive attribute, it can bear the working environment of higher-strength.
As shown in Figure 5, external screw rod 3 is the screw rod of a long tubular, and external screw rod 3 includes the first spiral shell with the first screw thread 34
Bar portion 31, the first shank 32 positioned at the rearward end of the first threaded shank 31, it is secondary that the first screw thread 34 includes the first main thread 341 and first
Screw thread 342, compared to the extrusion screw rod of traditional big L/D ratio（The reach of traditional extrusion screw rod and the diameter of screw rod it
Between ratio can reach 33:1 even more high）, in the present embodiment, length and the outer spiral shell of the first main thread 341 of external screw rod 3
Ratio between the diameter of bar 3 is only 19~20：1, preferably 19:1, therefore, the length of whole external screw rod 3 can be made short,
Its floor space is also smaller, and energy consumption is relatively low, compared to the structure of traditional screw parallel,（Because the high speed of twin-screw turns
Dynamic, the shear heat that the plastic raw materials between two screw rods are born is larger, easily decomposes；But the screw rod of smaller draw ratio
The problem of so again be present, i.e. plastic raw materials still have partly plastic raw material not yet to melt and be squeezed when close to discharge outlet
Go out, and then influence extrusion quality）Therefore, it is provided with the first threaded shank 31 of external screw rod 3 and is mutually handed over the first main thread 341
For the first deputy thread 342 of arrangement, and the pitch of the first deputy thread 342 is more than the pitch of the first main thread 341, the first secondary spiral shell
The height of thread of line 342 is less than the height of thread of the first main thread 341, is formed between adjacent first major and minor screw thread along external screw rod 3
Axially extending helical groove 35, helical groove 35 forms sieve-like kerve, and the through hole 351 of sieve-like kerve is uniformly distributed and connects
Extrusion manifold 33.Advantage of this is that：The shear heat that plastic raw materials are born is added, avoids the screw rod of large and small draw ratio
The problem of many influence plasticizing effects easily occurred.First threaded shank 31 includes the internal leading portion 311 for hollow structure and interior
Portion is the back segment 312 of solid construction, and in the present embodiment, the length ratio of the back segment and leading portion can reach 0.8~1.2, preferably
0.8, leading portion 311 is internally formed extrusion manifold 33, and leading portion 311 is melt zone, i.e., plastic raw materials have been located when reaching at this section
In molten condition, back segment 312 is used as transportation section, i.e., the plastic raw materials inside the heating material road 12 in extruder barrel 1 are in outer spiral shell
Under the high-speed rotation of bar 3, melt zone is delivered to by transportation section, then squeeze by the entrance of through hole 351 of the sieve-like kerve on melt zone
In discharging channel 33.
As shown in Figure 6, the leading section of external screw rod connects with the discharging opening 13 of extruder barrel 1, in order to avoid positioned at outer spiral shell
The outer surface of bar 3, extruder barrel 1 inner surface between plastic raw materials revealed at discharging opening 13, on the leading section of external screw rod 3
The back pressure screw thread of fine pitch is provided with, the back pressure screw thread is external screw thread, advantage of this is that：Due to the high-speed rotation of external screw rod 3
And promote plastic raw materials to be moved to discharge outlet, can be former with plastics by one when plastic raw materials are moved to close at discharging opening 13
Expect the opposite power of the direction of motion, force plastic raw materials to flow back round about so that the plastic raw materials not yet melted can be complete
Entered back into after melting in extrusion manifold, further improve the plasticizing effect and extrusion quality of plastics.
As shown in Figure 7, the rearward end of external screw rod 3 is the first shank 32, to have avoided least a portion of plastic raw materials to
Moved at one shank 32,（Because there is a small amount of modeling between the outer surface of the first shank 32 and the inner surface of extruder barrel 1
When expecting raw material, the mechanical friction between the outer surface of the first shank 32 and the inner surface of extruder barrel 1 can be only increased, and then aggravate
The abrasion of external screw rod 3）Therefore less first shank threads 321 of one section of pitch are provided with the front end of the first shank 32, this
One shank threads 321 can not only exclude the unnecessary steam and impurity in the inside of extruder barrel 1, additionally it is possible to reduce the outer of external screw rod 3
Caused abrasion between surface and the inner surface of extruder barrel 1, and then protect external screw rod 3.
As shown in Figure 8, the leading section of inner screw 4 offers screwed hole, is fixed with the centre bore 65 of shunting disk 61 point
Flow cone 62, the rearward end of spreader 62 is connecting portion, has what is matched with above-mentioned screwed hole on the outer surface of the connecting portion
External screw thread, for inner screw 4 by screw threads for fastening on spreader 62, the leading portion of the first threaded shank 31 of external screw rod 3 is hollow structure,
Inner screw 4 is located in the leading portion of the first threaded shank 31, and inner screw 4 has the second threaded shank 41 and the second shank 42, the second screw rod
There is the second axially extending screw thread 43 along inner screw 4, in the present embodiment, the length of the second screw thread 43 on the outer surface in portion 41
The ratio of degree and the diameter of inner screw 4 can reach 14~15:1, preferably 14:1, therefore, compared to the knot of traditional twin-screw
Structure, the draw ratio of inner screw 4 is smaller, i.e., the size of inner screw 4 can be made small so that the structure of plastic extruder is more stepped up
Gather, energy consumption is smaller.
As shown in Figure 9, shunting disk 61 is in the form of annular discs, and shunting disk 61 has the multiple shunting muscle 63 radially extended, phase
Tap hole 64 is formed between adjacent two shuntings muscle 63, shunting disk 61 has a centre bore 65, and it is mounting hole to change centre bore 65.So
The shunting disk 61 of structure may be mounted at the inside of extruder barrel 1, therefore, plastic extruder 100 can realize extruder barrel 1 with
Directly plugged between extrusion die 2, eliminate the transition apparatus of centre, reduce energy consumption, improve extrusion efficiency.
As shown in Figure 10, part flow arrangement 6 is located at the connection of extruder barrel 1 and extrusion die 2, extruder barrel 1 and squeezes
Go out between mould 2 and be fastened by bolts, part flow arrangement 6 includes shunting disk 61, the spreader 62 on shunting disk 61, extrusion
Core 21 is installed, the rearward end of core 21, the leading section of spreader 62 are commonly mounted on the centre bore of shunting disk inside mould 2
Interior, shunting disk 61 is fastened on the discharge outlet of extruder barrel 1 by screw, and the rearward end of spreader 62 is connected by screw threads for fastening
Inner screw 4, and support and fixed effect are played to inner screw 4.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that spirit is made, should all be included within the scope of the present invention.
Claims (9)
- A kind of 1. extrusion screw rod of plastic extruder, it is characterised in that：Including external screw rod（3）And inner screw（4）, described outer spiral shell Bar（3）To move screw rod, described inner screw（4）To determine screw rod, described external screw rod（3）Including the first threaded shank（31）With first Shank（32）, described the first shank（32）For power input shaft, the first described threaded shank（31）It is hollow knot with inside The leading portion of structure（311）, described inner screw（4）It is coaxial to be set in the first described threaded shank（31）Leading portion（311）It is interior, it is described The first threaded shank（31）Leading portion（311）Inner surface and described inner screw（4）Outer surface between form extrusion manifold （33）, described the first threaded shank（31）With along described external screw rod（3）Circumferentially extending the first main thread（341）With One deputy thread（342）, described external screw rod（3）The first major and minor screw thread setting alternating with each other, adjacent described first is major and minor Helical groove is formed between screw thread（35）, described helical groove（35）Bottom be provided with the described extrusion manifold of connection（33） Multiple through holes（351）, described inner screw（4）Including the second threaded shank（41）With the second shank（42）, described the second handle Portion（42）It is rotatably arranged at the first described threaded shank（31）Inside, the second described threaded shank（41）With along described Inner screw（4）Circumferentially extending the second screw thread（43）, described the second screw thread（43）Thread rotary orientation and described first master Screw thread（341）Thread rotary orientation it is opposite.
- 2. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：Described helical groove（35）Shape Into sieve-like kerve.
- 3. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The first described deputy thread （342）Pitch be more than the first described main thread（341）Pitch.
- 4. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：Described helical groove（35）'s Groove width is along described external screw rod（3）Axial direction become larger from back to front.
- 5. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The first described main thread （341）Length be more than the first described deputy thread（342）Length.
- 6. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The first described main thread （341）Length be described external screw rod（3）19 to 20 times of diameter.
- 7. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The second described screw thread（43）'s Length is described inner screw（4）14 to 15 times of diameter.
- 8. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The first described deputy thread （342）Height of thread be less than the first described main thread（341）Height of thread.
- 9. the extrusion screw rod of plastic extruder according to claim 1, it is characterised in that：The first described threaded shank（31） With the internal back segment for solid construction（312）, described back segment（312）With described leading portion（311）Length ratio for 0.8~ 1.2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710949269.8A CN107877821A (en) | 2017-10-12 | 2017-10-12 | The extrusion screw rod of plastic extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710949269.8A CN107877821A (en) | 2017-10-12 | 2017-10-12 | The extrusion screw rod of plastic extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107877821A true CN107877821A (en) | 2018-04-06 |
Family
ID=61781528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710949269.8A Pending CN107877821A (en) | 2017-10-12 | 2017-10-12 | The extrusion screw rod of plastic extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107877821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815149A (en) * | 2021-11-22 | 2021-12-21 | 山东神驰石化有限公司 | Special extrusion hydroextractor discharging equipment of isoprene rubber |
| CN114311509A (en) * | 2020-09-30 | 2022-04-12 | 苏州苏模仪器有限公司 | Prevent blockking up injection model extruder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206335833U (en) * | 2016-12-22 | 2017-07-18 | 浙江双林机械股份有限公司 | ruminant-type extruder |
-
2017
- 2017-10-12 CN CN201710949269.8A patent/CN107877821A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206335833U (en) * | 2016-12-22 | 2017-07-18 | 浙江双林机械股份有限公司 | ruminant-type extruder |
Non-Patent Citations (1)
| Title |
|---|
| 林孔勇: "《中国机械设计大典 第3卷 机械零部件设计》", 江西科学技术出版社, pages: 717 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114311509A (en) * | 2020-09-30 | 2022-04-12 | 苏州苏模仪器有限公司 | Prevent blockking up injection model extruder |
| CN113815149A (en) * | 2021-11-22 | 2021-12-21 | 山东神驰石化有限公司 | Special extrusion hydroextractor discharging equipment of isoprene rubber |
| CN113815149B (en) * | 2021-11-22 | 2022-03-22 | 山东神驰石化有限公司 | Special extrusion hydroextractor discharging equipment of isoprene rubber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206335833U (en) | ruminant-type extruder | |
| CN101553328B (en) | Screw extruder for continuous extrusion of materials with high viscosity | |
| CN107877821A (en) | The extrusion screw rod of plastic extruder | |
| CN206066912U (en) | Conical double screw extruder with dynamic continuous mixing function | |
| CN212097462U (en) | Double-screw extruder for plastic production | |
| CN106976218A (en) | The minor caliber pipe extruding forming method and device of a kind of weldless trace | |
| CN107775936A (en) | Plastic extruder | |
| CN105729750A (en) | Blockage prevention efficient screw extruder | |
| CN210880768U (en) | A extruding means and inflation film manufacturing machine for inflation film manufacturing machine | |
| CN207564922U (en) | For the inner screw of plastic extruder | |
| CN107901381A (en) | Heat pipe-type temperature adjustment screw rod | |
| CN207564921U (en) | For the extrusion screw rod of plastic extruder | |
| CN201208792Y (en) | Energy-saving screw rod | |
| CN204672254U (en) | A kind of rotary extrusion machine of novel planetary wheel construction | |
| CN105082506B (en) | The coaxial tandem taper extrusion device of multistage | |
| CN207564908U (en) | For the part flow arrangement of plastic extruder | |
| CN102555261B (en) | Double worm oil press capable of preventing oil materials from sliding out of chamber | |
| CN105690713A (en) | Nested solid-liquid separation groove type extruder | |
| CN102773989A (en) | Multiscrew pressurizing extruder | |
| CN105984109B (en) | Extruder | |
| CN107471594A (en) | Plastic pipe and the general conical parallel dual-screw extruding machine of sheet material | |
| CN105936119B (en) | A kind of short screw extruder | |
| CN204914517U (en) | Hot melt adhesive screw extruder | |
| CN204136392U (en) | A kind of double screw extruder | |
| CN215825898U (en) | Single screw extruder for pipette |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |