CN207564922U - For the inner screw of plastic extruder - Google Patents
For the inner screw of plastic extruder Download PDFInfo
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- CN207564922U CN207564922U CN201721313788.7U CN201721313788U CN207564922U CN 207564922 U CN207564922 U CN 207564922U CN 201721313788 U CN201721313788 U CN 201721313788U CN 207564922 U CN207564922 U CN 207564922U
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- inner screw
- shank
- screw rod
- threaded shank
- extrusion
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Abstract
The utility model discloses a kind of inner screw for plastic extruder,Including the second threaded shank,The second shank on rear side of the second threaded shank,Fixing coaxial is arranged with slope thrust set on second shank,The material of slope thrust set is using high-tensile strength brass as the material of matrix,Graphite is inlaid on the outer surface of slope thrust set,Second threaded shank has the second screw thread along the circumferentially extending of inner screw,The front end of inner screw is provided with the internal thread for fixing inner screw,The outside of the outer surface of second threaded shank forms extrusion manifold,In this case,Plastics on the outside of extrusion manifold can enter extrusion manifold after complete melting,The molten plastic of high-speed motion can remove extrusion manifold forward along the second screw thread of inner screw to the front end of inner screw,Therefore,The plasticizing effect of plastics is more preferable,Compared with the prior art,The inner screw extrusion efficiency higher of this case.
Description
Technical field
The utility model is related to plastic extruder apparatus fields, more particularly to a kind of inner screw for plastic extruder.
Background technology
In the prior art, usually by improving efficient convey of extrusion screw rod plastic extruder is improved with plasticizing quality
Yield and extrusion quality.In this case, usually the thread forms of extrusion screw rod, kneading form, draw ratio, revolution etc. are done
Go out and change to reach above-mentioned purpose.During above-mentioned purpose is reached, extrusion screw rod, which encounters, to be disadvantageous in that：One：Greatly
The requirement on machining accuracy of the screw rod of draw ratio is higher, therefore manufacture cost is higher, and the screw rod of big L/D ratio is equipped with abnormity more and is kneaded
Section, this section had not only wasted draw ratio but also had improved difficulty of processing, however if extrusion screw rod machining accuracy is not high, plastics can be produced
Raw excessive shear, generates additional shear heat, destroys plastics inner strand, plastics is caused to be decomposed, and then influences to squeeze out
Quality；Two：In the extrusion of plastic extruder, due to extrusion screw rod under the environment such as high temperature, strong wear, large 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 usually can not be long,
Because not only floor space is larger for longer extrusion screw rod, but also needs to provide larger torsion and could drive its rotation, therefore,
The motor of relatively high power is just needed, so, the energy consumption for necessarily causing plastic extruder is excessive, is unfavorable for energy-saving and emission-reduction.
Invention content
In order to solve the above-mentioned technical problem, the purpose of this utility model, which is to provide one kind, can improve transfer efficiency and plasticizing
The inner screw of quality.
In order to realize the purpose of above-mentioned utility model, the utility model adopts the following technical solution：
A kind of inner screw for plastic extruder, including the second threaded shank, on rear side of second threaded shank
Second shank, fixing coaxial is arranged with slope thrust set on second shank, the material of slope thrust set be with
High-tensile strength brass is the material of matrix, and graphite, second threaded shank tool are inlaid on the outer surface of slope thrust set
There is the second screw thread along the circumferentially extending of the inner screw, the front end of the inner screw is provided with for fixed described
The internal thread of inner screw, the outside of the outer surface of second threaded shank form extrusion manifold.
In above-mentioned technical proposal, it is preferred that the length of second screw thread is the 14 to 15 of the inner screw diameter
Times.
In above-mentioned technical proposal, it is preferred that on second shank have along the inner screw circumferentially extending and
For excluding the second shank threads of steam and impurity.
In above-mentioned technical proposal, it is preferred that the chemical formula of the high-tensile strength brass is CuZn25Al6Mn4.
In above-mentioned technical proposal, it is preferred that the outer surface of the slope thrust set has graphite linings.
In above-mentioned technical proposal, it is preferred that be provided with groove, the graphite on the outer surface of the slope thrust set
It is embedded in the groove.
In above-mentioned technical proposal, it is preferred that the circumferentially extending that the groove is covered along the slope thrust.
The utility model obtains following advantageous effect compared with prior art：In this case, the modeling on the outside of extrusion manifold
Material can enter extrusion manifold after complete melting, and the molten plastic of high-speed motion can be inside along the second screw thread of inner screw
The front end of screw rod removes forward extrusion manifold, and therefore, the plasticizing effect of plastics is more preferable, compared with the prior art, this case it is interior
Screw Extrusion is more efficient.
Description of the drawings
Main view schematic cross-sectional view of the attached drawing 1 for the plastic extruder of the utility model；
Attached drawing 2 is the close-up schematic view A of attached drawing 1；
Main view schematic cross-sectional view of the attached drawing 3 for the extrusion screw rod of the utility model；
Attached drawing 4 is the close-up schematic view B of attached drawing 4；
Schematic front view of the attached drawing 5 for the external screw rod of the utility model；
Attached drawing 6 is the close-up schematic view C of attached drawing 5;
Attached drawing 7 is the close-up schematic view D of attached drawing 5；
Scheme of installation of the attached drawing 8 for the inner screw of the utility model；
Schematic front view of the attached drawing 9 for the shunting disk of the utility model；
Scheme of installation of the attached drawing 10 for the part flow arrangement of the utility model；
Wherein：100th, plastic extruder；1st, extruder barrel；11st, spout；12nd, material path is heated；13rd, discharge port；14th, add
Hot device；141st, heating blower；2nd, extrusion die；21st, heart mould；22nd, channel is squeezed out；3rd, external screw rod；31st, the first threaded shank；311、
Leading portion；312nd, back segment；313rd, location hole；3131st, step surface；32nd, the first shank；321st, the first shank threads；33rd, extruded stock
Road；34th, the first screw thread；341st, the first main thread；342nd, the first deputy thread；35th, spiral groove；351st, through-hole；36th, thrust axis
It holds；37th, back pressure screw thread；4th, inner screw；41st, the second threaded shank；42nd, the second shank；421st, the second shank threads；43rd, the second spiral shell
Line；5th, driving device；6th, part flow arrangement；61st, shunting disk；62nd, spreader；63rd, muscle is shunted；64th, tap hole；65th, centre bore；7、
Slope thrust set；71st, thrust portion.
Specific embodiment
For technology contents, construction feature, institute's reached purpose and effect of utility model is described in detail, below in conjunction with implementation
Example simultaneously coordinates attached drawing to be described in detail.Wherein, the "front", "rear" being previously mentioned in the present embodiment is respectively shown in attached drawing 1
Left and right direction, " axial direction " are the direction extended along external screw rod/inner screw/extruder barrel or so shown in attached drawing 1, " circumferential direction "
For, around the direction of external screw rod/inner screw/extruder barrel outer circumference, " radial direction " is the edge shown in attached drawing 1 shown in attached drawing 1
The direction of the radius extension of the section circle of external screw rod/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 path 12 is formed, the front end of extruder barrel 1 is the discharge port 13 for connecting the heating material path 12, is squeezed
Go out above the rear lateral portion of machine barrel 1 and feeding seat is installed, the spout 11 for connecting the heating material path 12 is offered on feeding seat, because
This, plastic raw materials can be supplied by spout 11 to the inside of machine barrel 1, and the plastic raw materials entered from spout 11 will enter heating
Material path 12 heats.It is equipped on the outer surface of extruder barrel 1 for multiple heaters 14 to 1 heat supply of extruder barrel, 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 obtains external heat source, the advantage of doing so is that：It can be fully absorbed into the plastic raw materials inside extruder barrel 1 crowded
Go out the heat source outside machine barrel 1, preheated, be conducive to the melting and plasticizing of plastic raw materials.
The front end of extruder barrel 1 is being equipped with extrusion die 2, extrusion die 2 and extruder barrel 1 at discharge port 13
It directly plugs into, and is fastened by bolts, hollow structure is in 2 inside of extrusion die and is coaxially installed with core model 21, extrusion die
2 inside of tool, which has, squeezes out channel 22, is fixedly mounted at the discharge port 13 of extruder barrel 1 and is useful for the shunting for shunting molten plastic
Device 6, the part flow arrangement 6 include the shunting disk 61 for being fixed on 21 rear end of heart mould, the shunting for being fixed on 61 rear end of shunting disk
Cone 62.
What the inside of extruder barrel 1 rotated coaxially is provided with external screw rod 3, and external screw rod 3 is in elongated rod shape, the appearance of external screw rod 3
The first screw thread 34 is provided on 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 equipped with driving device 5, the first shank 32 and driving
5 phase of device is sequentially 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 equipped with thrust bearing 36.The leading portion of first threaded shank 31 is hollow structure, is formed and squeezed out inside the leading portion of this hollow structure
Material path 33 has the axially extending spiral groove 35 along external screw rod 3 on the outer surface of first threaded shank 31, spiral 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, front end and the spreader 62 of inner screw 4 are coaxially installed with inside the leading portion of first threaded shank 31
Rear end be fixedly connected, the inside for the first threaded shank 31 for being arranged on external screw rod 3 that the rear end of inner screw 4 relatively rotates
（I.e. in 3 high-speed rotation of external screw rod, inner screw 4 keeps opposing 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 on the outer surface of inner screw 4
It is oppositely oriented, in this way setting be because：Due to 3 high-speed rotation of external screw rod and plastic raw materials is driven also to rotate therewith, due to interior
Screw rod 4 is static, and the plastic raw materials of movement will be moved along 43 extending direction of the second screw thread on inner screw 4.Institute in attached drawing 1
The course of work of plastic extruder 100 shown is as follows：The plastic raw materials entered by spout 11 are introduced into inside extruder barrel 1
It heats in material path 12 and preheats, 3 high-speed rotation of external screw rod and plastic raw materials is pushed to move forward（I.e. towards the direction of discharge port 13
It is mobile）, external screw rod 3 generates 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, on one side move forward, on one side melt, after plastic raw materials completely melting 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 promote 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.The advantage of doing so is that：First, plastic raw materials are avoided in 1 internal stops time of extruder barrel mistake
It is long, this is 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 in extrusion manifold 33 after plastic raw materials melting, 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 path 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,
Spiral groove 35 is formd between the first adjacent major and minor screw thread, the bottom of spiral groove 35 is evenly arranged 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 path 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 by these through-holes 351 in extrusion manifold 33.
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 sequentially connected for power input shaft and with driving device 5.The inside leading portion of first threaded shank 31 is
Hollow structure, inner screw 4 is coaxially set in the leading portion 311 of the first threaded shank 31 and the rear end of external screw rod 3 can be opposite
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 are alternately arranged, shape between adjacent first major and minor screw thread
Into spiral groove 35, the groove width of spiral groove 35 becomes larger from back to front along the axial direction of external screw rod 3, the advantage of doing so is that：
Groove width due to spiral groove 35 is becoming increasing close at discharge port 12, positioned at the logical of 35 bottom of spiral groove
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 discharge port 13, great Liang Rong
The plastic raw materials melted are entered by these through-holes 351 in extrusion manifold 12 when close to discharge port 13, this using inside and outside screw rod
The structure being coaxially arranged not only so that the plasticizing effect of plastic raw materials is more preferable, but also the extrusion efficiency of plastic extruder also higher.
As shown in Figure 4, extrusion manifold 33 and inner screw 4 are formed inside the leading portion of the first threaded shank 31 of external screw rod 3
In the extrusion manifold 33, the rear end of inner screw 4 is the second shank 42, to have avoided least a portion of plastic raw materials to second
It is moved at shank 42,（This is 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, into
And aggravate the abrasion of inner screw 4）Therefore smaller second shank threads of one section of screw pitch are provided in the front side of the second shank 42
421, which can not only exclude the extra steam and impurity in 3 inside of external screw rod, additionally it is possible to reduce inner screw
The abrasion generated between 4 outer surface and the internal face of external screw rod 3, and then protect inner screw 4；It is coaxially fixed on second shank 42
Slope thrust set 7 is arranged with, the leading portion 311 of the first threaded shank 31 is interior to be provided with location hole 313 along the axial direction of external screw rod 3, slides
Thrust sleeve 7 is located in the location hole 313, and location hole 313 has the step surface 3131 radially extended, and slope thrust set 7 has
The thrust portion 71 that outer diameter becomes larger, thrust portion 71 are 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 a large amount of frictional heat, therefore can be pushed away in slip
Groove is opened up, and high-quality graphite is inlayed in this groove on the outer surface of power set 7,7 appearance can also be covered in slope thrust
Face overlying last layer graphite linings, the advantage of doing so is that：Since slope thrust set 7 plays the effect similar with bearing here,
But compared to traditional bearing, there is general bearing institute without being：One is due to the appearance of slope thrust set 7
Face is covered with graphite, therefore slope thrust set 7 does not need to addition lubricating oil and self-lubricating, the two, due to slope thrust set 7 can be realized
The high temperature resistant of material itself, anti abrasive attribute 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 31 rear end of the first threaded shank, 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 is even higher）, 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 entire 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,（Since 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
Again there are this problem, i.e. plastic raw materials still have partly plastic raw material not yet to melt and are squeezed when close to discharge outlet
Go out, and then influence to squeeze out quality）Therefore, it is provided in 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 screw pitch of the first deputy thread 342 is more than the screw 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 spiral groove 35, spiral groove 35 forms sieve-like kerve, and the through-hole 351 of sieve-like kerve is uniformly distributed and connects
Extrusion manifold 33.The advantage of doing so is that：The shear heat that plastic raw materials are born is increased, avoids the screw rod of large and small draw ratio
The problem of many influence plasticizing effects being susceptible to.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
0.8,311 inside of leading portion forms 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 path 12 in extruder barrel 1 are in outer spiral shell
Under the high-speed rotation of bar 3, melt zone is delivered to, then squeeze by the entrance of through-hole 351 of the sieve-like kerve on melt zone by transportation section
In discharging channel 33.
As shown in Figure 6, the front end of external screw rod connects with the discharge port 13 of extruder barrel 1, in order to avoid being located at outer spiral shell
3 outer surface of bar, extruder barrel 1 inner surface between plastic raw materials revealed at discharge port 13, on the front end of external screw rod 3
The back pressure screw thread of fine pitch is provided with, which is external screw thread, the advantage of doing so is that：Due to 3 high-speed rotation of external screw rod
And plastic raw materials is pushed to be moved to discharge outlet, it can be former with plastics by one when plastic raw materials are moved to close at discharge port 13
Expect the opposite power of the direction of motion, plastic raw materials is forced to flow back round about so that the plastic raw materials not yet melted can be complete
It is entered back into extrusion manifold after melting, further improve the plasticizing effect of plastics and squeezes out quality.
As shown in Figure 7, the rear end of external screw rod 3 is the first shank 32, to have avoided least a portion of plastic raw materials to the
It is moved at one shank 32,（This is 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 smaller first shank threads 321 of one section of screw pitch are provided in the front end of the first shank 32, this
One shank threads 321 can not only exclude the extra steam and impurity in 1 inside of extruder barrel, additionally it is possible to reduce the outer of external screw rod 3
The abrasion generated between 1 inner surface of surface and extruder barrel, and then protect external screw rod 3.
As shown in Figure 8, the front end of inner screw 4 offers threaded hole, is fixed in the centre bore 65 of shunting disk 61 point
Flow cone 62, the rear end of spreader 62 is connecting portion, has what is matched with above-mentioned threaded 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 smaller of inner screw 4, the i.e. size of inner screw 4 can be made small so that the structure of plastic extruder is more stepped up
It gathers, energy consumption 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, changes centre bore 65 as mounting hole.In this way
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
It directly plugs between extrusion die 2, eliminates intermediate transition apparatus, 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 mold 2 and be fastened by bolts, part flow arrangement 6 includes shunting disk 61, the spreader 62 on shunting disk 61, squeezes out
Core model 21 is installed, the rear end of core model 21, the front end of spreader 62 are commonly mounted on the centre bore of shunting disk inside mold 2
Interior, shunting disk 61 is fastened on the discharge outlet of extruder barrel 1 by screw, and the rear end of spreader 62 is connected by screw threads for fastening
Inner screw 4, and play the role of supporting and fixing to inner screw 4.
Above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement according to this, can not the scope of protection of the utility model be limited with this.
All equivalent change or modifications made according to the spirit of the present invention, should be covered within the scope of the utility model.
Claims (7)
1. a kind of inner screw for plastic extruder, it is characterised in that：Including the second threaded shank（41）, positioned at described second
Threaded shank（41）Second shank of rear side（42）, second shank（42）Upper fixing coaxial is arranged with slope thrust set（7）,
The slope thrust set（7）Material be using high-tensile strength brass as the material of matrix, the slope thrust set（7）Outer surface
On be inlaid with graphite, second threaded shank（41）With along the inner screw（4）Circumferentially extending the second screw thread
（43）, the inner screw（4）Front end be provided with for the inner screw（4）Internal thread, described second
Threaded shank（41）Outer surface outside formed extrusion manifold（33）.
2. the inner screw according to claim 1 for plastic extruder, it is characterised in that：Second screw thread（43）
Length be the inner screw（4）14 to 15 times of diameter.
3. the inner screw according to claim 1 for plastic extruder, it is characterised in that：Second shank（42）
It is upper to have along the inner screw（4）Circumferentially extending and for excluding the second shank threads of steam and impurity（421）.
4. the inner screw according to claim 1 for plastic extruder, it is characterised in that：The change of the high-tensile strength brass
Formula is CuZn25Al6Mn4.
5. the inner screw according to claim 1 for plastic extruder, it is characterised in that：The slope thrust set
（7）Outer surface have graphite linings.
6. the inner screw according to claim 1 for plastic extruder, it is characterised in that：The slope thrust set
（7）Outer surface on be provided with groove, the graphite is embedded in the groove.
7. the inner screw according to claim 6 for plastic extruder, it is characterised in that：The groove is along described
Slope thrust set（7）Circumferentially extending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313788.7U CN207564922U (en) | 2017-10-12 | 2017-10-12 | For the inner screw of plastic extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313788.7U CN207564922U (en) | 2017-10-12 | 2017-10-12 | For the inner screw of plastic extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207564922U true CN207564922U (en) | 2018-07-03 |
Family
ID=62695148
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721313788.7U Active CN207564922U (en) | 2017-10-12 | 2017-10-12 | For the inner screw of plastic extruder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482101A (en) * | 2020-12-15 | 2021-03-12 | 中铁宝桥集团有限公司 | Novel straddle type monorail turnout joint type turnout cross hinge device |
-
2017
- 2017-10-12 CN CN201721313788.7U patent/CN207564922U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112482101A (en) * | 2020-12-15 | 2021-03-12 | 中铁宝桥集团有限公司 | Novel straddle type monorail turnout joint type turnout cross hinge device |
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