CN204209947U - A kind of PE extrusion screw rod - Google Patents
A kind of PE extrusion screw rod Download PDFInfo
- Publication number
- CN204209947U CN204209947U CN201420633699.0U CN201420633699U CN204209947U CN 204209947 U CN204209947 U CN 204209947U CN 201420633699 U CN201420633699 U CN 201420633699U CN 204209947 U CN204209947 U CN 204209947U
- Authority
- CN
- China
- Prior art keywords
- thread
- section
- blind slot
- charging
- oblique blind
- 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.)
- Active
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 26
- 238000007906 compression Methods 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 23
- 239000007791 liquid phase Substances 0.000 claims abstract description 21
- 239000007790 solid phase Substances 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 230000004927 fusion Effects 0.000 abstract description 4
- 238000000265 homogenisation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 33
- 238000002844 melting Methods 0.000 description 20
- 230000008018 melting Effects 0.000 description 20
- 239000004698 Polyethylene Substances 0.000 description 15
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 238000010008 shearing Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The utility model discloses a kind of PE extrusion screw rod, along being fed to screw head direction, its main body is provided with feeding section in turn, compression section, barrier screen, mixing section and metering section, wherein feeding section is provided with the charging spout that single thread is formed, metering section is provided with the measuring tank that single thread is formed, compression section is provided with the different main thread of helical pitch and added thread, and on compression section, form the solid phase groove and liquid phase groove that are connected with charging spout respectively, the external diameter of added thread is less than the external diameter of main thread, barrier screen is provided with some oblique blind slots of charging to being surrounded by non-common screw thread and shared screw thread respectively and the oblique blind slot of discharging, separate by sharing screw thread between often pair of oblique blind slot of charging and the oblique blind slot of discharging, and the entrance of the oblique blind slot of charging is connected with liquid phase groove, the outlet of the oblique blind slot of discharging is connected with mixing section, the external diameter sharing screw thread is less than the external diameter of non-common screw thread, mixing section is provided with parallel double wedge.The utility model fusion plastification is effective, and homogenization degree is high, and dispersed and uniformity all significantly improves.
Description
Technical field
The utility model relates to a kind of plastic extrusion facility, especially relates to the extrusion screw rod of PE extrusion moulding machine.
Background technology
Accompanying drawing 1 is the structural representation of existing common polyolefin extrusion screw rod, its screw rod is single thread structure, comprise bringing-up section 1, compression section 2, metering section 3 and screw head 4, when solid-state polyethylene enters barrel from hopper, under screw rod turning effort, feeding section 1 is fed forward to by material tube inner wall and the effect of screw surface fricting shearing, be fed forward at this loose solid and be compacted simultaneously and enter compression section 2, the spiral groove depth of compression section 2 shoals, and screen pack, the inhibition of flow distribution plate or head, polyethylene is by further compacting, with this simultaneously, polyethylene absorbs the heat come from the conduction of barrel external heating device, temperature constantly rises, the polyethylene of melting constantly increases, and the polyethylene of non-melting constantly reduces.When polyethylene moves to compression section end, polyethylene all or major part change viscosity flow state into by molten condition, after polyethylene enters metering section 3, to be further plasticized, homogenising, then to clamp-on head from screw head 4.
The defect of current existing PE extrusion screw rod is: 1, the pressure of whole screw rod is all set up by the pressure of bringing-up section, when head pressure is large, will reduce the charging capability of screw rod; 2, screw rod output affects significantly by head pressure, and plastic extrusion fluctuation is large; 3, the plasticizing effect of material is not good, and melting efficiency is low, and mixing even not, output is not high, 4, high yield time, plastify poor, the melt temperature difference is large, and output fluctuation is larger.
Summary of the invention
The purpose of this utility model be to provide a kind of melting efficiency high, plastify even, mixing evenly, measure the PE extrusion screw rod of accurate high rotating speed high yield.
Technical solution of the present utility model is: a kind of PE extrusion screw rod, along being fed to screw head direction, its main body is provided with feeding section in turn, compression section, barrier screen, mixing section and metering section, wherein feeding section is provided with the charging spout that single thread is formed, metering section is provided with the measuring tank that single thread is formed, compression section is provided with the different main thread of helical pitch and added thread, and on compression section, form the solid phase groove and liquid phase groove that are connected with charging spout respectively, the external diameter of added thread is less than the external diameter of main thread, barrier screen is provided with some oblique blind slots of charging to being surrounded by non-common screw thread and shared screw thread respectively and the oblique blind slot of discharging, separate by sharing screw thread between often pair of oblique blind slot of charging and the oblique blind slot of discharging, and the entrance of the oblique blind slot of charging is connected with liquid phase groove, the outlet of the oblique blind slot of discharging is connected with mixing section, the external diameter sharing screw thread is less than the external diameter of non-common screw thread, mixing section is provided with parallel double wedge.
Compression section adopts the main thread and added thread that helical pitch is different, thus form solid phase groove and liquid phase groove, enhance Solid-Liquid Separation and fusion plastification effect, avoid material in the clogging of feeding section and compression section, improve charging and plasticizing capacity, the shared screw thread of barrier screen can stop that a certain size solid phase is passed through, it is made to stay the shearing or the heating that continue to stand screw thread in the oblique blind slot of charging, impel its melting, share screw thread and stronger shearing is carried out to the material passed through, make the further melting of material, in mixing section, by parallel double wedge, melt and solid material are upset distribution, repeatedly separate and converge, change the direction of logistics between barrel and screw rod and VELOCITY DISTRIBUTION, that solid phase and liquid phase fully mix, be conducive to improving the mixing of material, the dispersiveness of homogenization degree and filler, metering section can material fully after mixed melting, make plasticizing evenly, improve the pressure of plastics at head, strengthen the toughness needed for material compacting agent following process of extruded product.
The length of described feeding section is 10-14 times of outer screw diameter.Preferred scheme is the length of described feeding section is 12 times of outer screw diameter.Extend feeding section, when extrusion screw rod works, the barrel that feeding section goes out can be cooled, postpone polyethylene melting and effective frictional resistance reducing solid material and screw surface, improve the conveying capacity of feeding section.
The helical pitch of described main thread is greater than added thread helical pitch, the helical pitch of described main thread is greater than added thread helical pitch, the bottom land of described solid phase groove extends along the bottom land of described charging spout to added thread outer surface direction, and the bottom land of described liquid phase groove extends from added thread outer surface to described charging oblique blind slot bottom land direction.The clogging of material in compression section can be improved further.
The external diameter 0.5-2mm less of described main thread external diameter of described added thread.The shearing force of material and screw rod is reduced, and the low temperature being beneficial to material is extruded.
The orthogonal cross-sectional shape of the oblique blind slot of described charging and the oblique blind slot of described discharging is semicircle, half elliptic, U-shaped or trapezoidal.
The bottom land of the oblique blind slot of described charging extends along described liquid phase groove bottom land to described shared thread surface direction, and the bottom land of the oblique blind slot of described discharging extends along described shared thread surface to the root direction of described double wedge.The degree of depth of the oblique blind slot of charging reduces gradually, and the degree of depth of the oblique blind slot of discharging increases gradually, is conducive to the existence reducing dead angle, forces material by barrier screen, reduce the time of staying of material, avoids it to decompose or heats up.
The cross sectional shape of described double wedge is rectangle, circle, square, rhombus or trapezoidal.Be applicable to the occasion of different material extrusion plasticizing.
The utility model has the advantages that: charging capability is high, fusion plastification is effective, improves the choking phenomenon of material in compression section, and improve plasticizing capacity, good mixing effect, homogenization degree is high, and dispersed and uniformity all significantly improves, and accurate measurement, extrusion temperature is low.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of extrusion screw rod in prior art;
Accompanying drawing 2 is the structural representation of the utility model embodiment;
Accompanying drawing 3 is the structural representation of compression section in the utility model embodiment;
Accompanying drawing 4 is the structural representation of barrier screen in the utility model embodiment;
Accompanying drawing 5 is the structural representation of mixing section in the utility model embodiment;
1, feeding section, 2, compression section, 3, metering section, 4, screw head, 5, feeding section, 51, charging spout, 6, compression section, 61, liquid phase groove, 62, solid phase groove, 63, main thread, 64, added thread, 7, barrier screen, 71, screw thread is shared, 72, the oblique blind slot of charging, 73, the oblique blind slot of discharging, 74, non-common screw thread, 8, mixing section, 81, double wedge, 9, metering section, 91, measuring tank, 10, screw head.
Detailed description of the invention
Embodiment:
Consult Fig. 2-5, a kind of PE extrusion screw rod, along being fed to screw head 10 direction, its main body is provided with feeding section 5 in turn, compression section 6, barrier screen 7, mixing section 8 and metering section 9, wherein feeding section 5 is provided with the charging spout 51 that single thread is formed, metering section 9 is provided with the measuring tank 91 that single thread is formed, compression section 6 is provided with the different main thread of helical pitch 63 and added thread 64, and on compression section 6, form the solid phase groove 62 and liquid phase groove 61 that are connected with charging spout 51 respectively, the external diameter of added thread 64 is less than the external diameter of main thread 63, barrier screen 7 is provided with some oblique blind slots of charging 72 to being surrounded by non-common screw thread 74 and shared screw thread 71 respectively and the oblique blind slot 73 of discharging, separate by sharing screw thread 71 between often pair of oblique blind slot of charging 72 and the oblique blind slot 73 of discharging, and the entrance of the oblique blind slot 72 of charging is connected with liquid phase groove 61, the outlet of the oblique blind slot 73 of discharging is connected with mixing section 8, the external diameter sharing screw thread 71 is less than the external diameter of non-common screw thread 74, mixing section 8 is provided with parallel double wedge 81.
The effective length of the screw rod of the present embodiment is 40 times of outer screw diameter.The form of screw head 10 is conical screw head.
Feeding section 5 designs for one start screw, the width of charging spout 51 equals outer screw diameter, and remain unchanged, the degree of depth of charging spout 51 is 0.09-0.15 times of outer screw diameter, major diameter of thread is constant, the width of thread is 0.05-0.1 times of outer screw diameter, and the total length of feeding section 5 is 10-14 times of outer screw diameter, is preferably 12 times of outer screw diameter.
The helical pitch of the main thread 63 on compression section 6 is greater than the helical pitch of added thread 64, and the helical pitch of main thread 63 is 1.05-1.8 times of outer screw diameter, and the helical pitch of added thread 63 is 0.9-1.6 times of outer screw diameter.The width of solid phase groove 62 diminishes gradually from feeding section 5 to barrier screen 7 direction, until disappear, the bottom land of solid phase groove 62 extends along the bottom land of charging spout 51 to added thread 64 outer surface direction.The bottom land of liquid phase groove 61 extends from added thread 64 outer surface to the bottom land direction of the oblique blind slot 73 of described charging, and the width of liquid phase groove 61 increases to the width of measuring tank 91 gradually by zero.The external diameter 0.5-2.0mm less of the external diameter of main thread 63 of added thread 64.Main thread 63 width of compression section 6 is 0.05-0.1 times of outer screw diameter, and the width of added thread 64 is 0.03-0.06 times of outer screw diameter, and length is 10-20 times of outer screw diameter.
Equidistantly on the face of cylinder of barrier screen 7 be provided with even number (6-20) the oblique blind slot of charging 72 and the oblique blind slot 73 of discharging, wherein the bottom land of the oblique blind slot of charging 72 extends along liquid phase groove 61 bottom land to shared screw thread 71 surface direction, and the bottom land of the oblique blind slot 73 of discharging extends along sharing the root direction of screw thread 71 surface to double wedge 81.Share the external diameter 0.6-1.5mm less of the external diameter of non-common screw thread 74 of screw thread 71, the width of screw thread is 3-5mm.The length of barrier screen 7 is 3-8 times of outer screw diameter.The orthogonal cross-sectional shape of the oblique blind slot of charging 72 and the oblique blind slot of discharging 73 is semicircle, half elliptic, U-shaped or trapezoidal.
The surface of mixing section 8 is equidistantly provided with the double wedge 81 of several and axis being parallel, be 4-30 in the number of screw rod circumferentially annular array, the row that screw axial arranges is 4-10 row.The cross sectional shape of double wedge 81 is rectangle, circle, square, rhombus or trapezoidal, and be convenient to processing, processing cost is also low.The length of mixing section 8 is 5-10 times of outer screw diameter.
Metering section 9 adopts single thread to form measuring tank 91, and lead angle is 26-34 °, and the width of thread is 0.07-0.13 times of outer screw diameter, and pitch is constant.The bottom land footpath of measuring tank 91 is constant, and groove depth is 0.03-0.09 times of outer screw diameter.The length of metering section 9 is 7-14 times of outer screw diameter.
Operation principle and the course of work of the present embodiment is described in detail below in conjunction with said structure.
Material enters the feeding section 5 of screw rod from hopper, under screw speed effect, is pushed to screw head 10 gradually and is compacted, simultaneously melting gradually under the shearing and external heater effect of screw rod and barrel.In the compression section 6 of screw rod, material starts melting in course of conveying, under the promotion of screw rod, the material of melting is crossed added thread 64 and is entered in liquid phase groove 61, and the solids of non-melting are blocked by added thread 64, still in solid phase groove 62, thus realize the material of melting and the feed separation of non-melting, the basic melting in place being zero at the width of solid phase groove 62 completes; The plastics of melting and solid plastic are separated, and shearing that the plastics of melting are subject to reduces, thus realize low temperature and extrude, and this also provides condition for realizing running up of screw rod.At barrier screen 7, share on the one hand screw thread 71 and stop that a certain size solid phase is passed through, the shearing making it stay to continue to stand screw thread in the oblique blind slot 72 of charging, extruding or heating, impel melting; Share on the other hand screw thread 71 and carry out stronger shearing to the material crossing shared screw thread 71, material is got back further melting or plasticizing; The material crossing shared screw thread 71 produces eddy motion in the oblique blind slot 73 of discharging, and material is got back mixing.These are sheared and mechanical energy is heat energy by mixing, thus the melting homogenizing of strength imparting material.When material flows through shared screw thread 71, each interlayer of stream has larger speed difference, produces interlayer slip and produces frictional heat, thus facilitating the plasticizing of material; Material is when entering the oblique blind slot 72 of charging, material is divided into some stocks by banded laminar flow, when flowing through the oblique blind slot 73 of discharging, material is merged together by some stocks, the direction that stream easily produces eddy current and stream changes, such each several part material redistribution mixing, is conducive to the dispersion of additive and look mother.At mixing section 8, that solid material is smashed by double wedge 81 on the one hand, destroy melt, upset the two-phase flow of solid and liquid, and by stream repeatedly separately and converge, change the direction of stream in barrel and VELOCITY DISTRIBUTION, solid phase and liquid phase are fully mixed, increase the heat transfer area between solid phase and liquid phase, and certain resistance and fricting shearing are produced to material, make solid phase fusion; Be on the other hand material is carried out repeated segmentation, shunt and converge, thus increase the dispersiveness to additive, look mother.At metering section 9, melt, under the promotion of screw thread, sets up higher melt pressure, accurate as measuring pump, quantitative melt conveying material, increases and just flows, and reduces pressure current and leakage current, make to plastify more fully evenly.
Above-listed detailed description is illustrating for one of the utility model possible embodiments, this embodiment is also not used to limit the scope of the claims of the present utility model, allly do not depart from the equivalence that the utility model does and implement or change, all should be contained in the scope of the claims of this case.
Claims (8)
1. a PE extrusion screw rod, it is characterized in that: along being fed to screw head direction, its main body is provided with feeding section in turn, compression section, barrier screen, mixing section and metering section, wherein feeding section is provided with the charging spout that single thread is formed, metering section is provided with the measuring tank that single thread is formed, compression section is provided with the different main thread of helical pitch and added thread, and on compression section, form the solid phase groove and liquid phase groove that are connected with charging spout respectively, the external diameter of added thread is less than the external diameter of main thread, barrier screen is provided with some oblique blind slots of charging to being surrounded by non-common screw thread and shared screw thread respectively and the oblique blind slot of discharging, separate by sharing screw thread between often pair of oblique blind slot of charging and the oblique blind slot of discharging, and the entrance of the oblique blind slot of charging is connected with liquid phase groove, the outlet of the oblique blind slot of discharging is connected with mixing section, the external diameter sharing screw thread is less than the external diameter of non-common screw thread, mixing section is provided with parallel double wedge.
2. a kind of PE extrusion screw rod according to claim 1, is characterized in that: the length of described feeding section is 10-14 times of outer screw diameter.
3. a kind of PE extrusion screw rod according to claim 2, is characterized in that: the length of described feeding section is 12 times of outer screw diameter.
4. a kind of PE extrusion screw rod according to claim 1 or 2 or 3, it is characterized in that: the helical pitch of described main thread is greater than added thread helical pitch, the bottom land of described solid phase groove extends along the bottom land of described charging spout to added thread outer surface direction, and the bottom land of described liquid phase groove extends from added thread outer surface to described charging oblique blind slot bottom land direction.
5. a kind of PE extrusion screw rod according to claim 4, is characterized in that: the external diameter 0.5-2mm less of described main thread external diameter of described added thread.
6. a kind of PE extrusion screw rod according to claim 4, is characterized in that: the orthogonal cross-sectional shape of the oblique blind slot of described charging and the oblique blind slot of described discharging is semicircle, half elliptic, U-shaped or trapezoidal.
7. a kind of PE extrusion screw rod according to claim 6, it is characterized in that: the bottom land of the oblique blind slot of described charging extends along described liquid phase groove bottom land to described shared thread surface direction, and the bottom land of the oblique blind slot of described discharging extends along described shared thread surface to the root direction of described double wedge.
8. a kind of PE extrusion screw rod according to claim 4, is characterized in that: the cross sectional shape of described double wedge is rectangle, circle, square, rhombus or trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633699.0U CN204209947U (en) | 2014-10-29 | 2014-10-29 | A kind of PE extrusion screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633699.0U CN204209947U (en) | 2014-10-29 | 2014-10-29 | A kind of PE extrusion screw rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204209947U true CN204209947U (en) | 2015-03-18 |
Family
ID=52978651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420633699.0U Active CN204209947U (en) | 2014-10-29 | 2014-10-29 | A kind of PE extrusion screw rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204209947U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325621A (en) * | 2014-10-29 | 2015-02-04 | 佛山市日丰企业有限公司 | PE extrusion screw |
| CN109280240A (en) * | 2018-08-08 | 2019-01-29 | 日丰企业（佛山）有限公司 | The preparation method of chemical crosslinking polyethylene foamed material and a kind of screw rod |
| CN109352948A (en) * | 2018-10-15 | 2019-02-19 | 深圳市信维通信股份有限公司 | A kind of forming method of extrusion equipment and LCP sheet material |
-
2014
- 2014-10-29 CN CN201420633699.0U patent/CN204209947U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325621A (en) * | 2014-10-29 | 2015-02-04 | 佛山市日丰企业有限公司 | PE extrusion screw |
| CN109280240A (en) * | 2018-08-08 | 2019-01-29 | 日丰企业（佛山）有限公司 | The preparation method of chemical crosslinking polyethylene foamed material and a kind of screw rod |
| CN109352948A (en) * | 2018-10-15 | 2019-02-19 | 深圳市信维通信股份有限公司 | A kind of forming method of extrusion equipment and LCP sheet material |
| CN109352948B (en) * | 2018-10-15 | 2023-12-19 | 深圳市信维通信股份有限公司 | Extrusion equipment and molding method of LCP (liquid crystal display) sheet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104354284A (en) | Polyolefin extrusion screw | |
| EP3144121A1 (en) | Plasticizing delivery method and device using eccentric rotor and having pulsed volume deformation | |
| CN204209947U (en) | A kind of PE extrusion screw rod | |
| CN204773494U (en) | Extruder screw rod | |
| CN104325621A (en) | PE extrusion screw | |
| CN204172318U (en) | A kind of polyolefin extrusion screw rod | |
| CN104589618B (en) | Special two-section BM type screw rod for wire and cable extruder | |
| CN104290309B (en) | Extruding screw for single screw extruder | |
| RU154655U1 (en) | THERMOPLAST PROCESSING EXTRUDER | |
| CN108437400A (en) | A kind of high rotating speed high yield PP extrusion screw rods of seven segmentation of two-stage | |
| CN204222135U (en) | There is the extrusion screw rod of the single screw extrusion machine of parallel-segment | |
| CN204869584U (en) | Single -screw extruder | |
| CN104416881A (en) | Efficient combined single screw | |
| CN205395090U (en) | Plastic extruder | |
| RU156861U1 (en) | EXTRUDER FOR PROCESSING SECONDARY POLYMERS | |
| CN208529693U (en) | A kind of high density polyethylene (HDPE) extruding pipe material bolt special | |
| CN208148457U (en) | A kind of high revolving speed high yield PP extrusion screw rod of seven segmentation of two-stage | |
| CN201669874U (en) | High-speed extrusion single screw for polypropylene | |
| CN204172317U (en) | A kind of extrusion screw rod of single screw extrusion machine | |
| CN205167291U (en) | Eager grain device is extruded in temperature sensing raw material particle's automation | |
| CN105313287A (en) | Single-screw extruder | |
| CN204604823U (en) | Jet forming machine and melten gel screw rod thereof | |
| CN204526092U (en) | The special two sections of BM formula screw rods of electric wire extruder | |
| CN210082333U (en) | Screw rod for injection molding machine | |
| CN208215971U (en) | A kind of extruder screw |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 528000 Guangdong province Foshan City Temple Road No. 16 HSBC Building 8 floor Patentee after: RIFENG ENTERPRISE GROUP CO., LTD. Patentee after: WENZHOU RIFENG TECHNOLOGY CO., LTD. Address before: 528000 Guangdong province Foshan City Temple Road No. 16 HSBC Building 8 floor Patentee before: Rifeng Enterprise Co., Ltd., Foshan Patentee before: Foshan market day rich science and technology in enterprise company limited |