CN217275610U - Large-size ceramic flat plate sintering tool - Google Patents
Large-size ceramic flat plate sintering tool Download PDFInfo
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- CN217275610U CN217275610U CN202220665576.XU CN202220665576U CN217275610U CN 217275610 U CN217275610 U CN 217275610U CN 202220665576 U CN202220665576 U CN 202220665576U CN 217275610 U CN217275610 U CN 217275610U
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- ceramic flat
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- 239000000919 ceramic Substances 0.000 title claims abstract description 39
- 238000005245 sintering Methods 0.000 title claims abstract description 25
- 238000003825 pressing Methods 0.000 claims description 53
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000011324 bead Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The utility model discloses a jumbo size pottery dull and stereotyped sintering frock relates to ceramic plate production and processing equipment technical field, including the frock frame, the frock frame is inside to be enclosed to establish and is formed with the clamping region, frock frame top surface left and right sides and bottom surface left and right sides all are provided with first clamping structure, frock frame middle part is provided with second clamping structure, first clamping structure is including seting up the first sliding tray on frock frame surface, the installation base strip at first sliding tray is established to the card, be equipped with vertical positioning rod on the installation base strip, be provided with the briquetting on the vertical positioning rod, second clamping structure includes two mounting boxes, inside fixed rail and the lower fixed rail of wearing to be equipped with of mounting box, go up fixed rail and lower fixed rail and enclose to establish and form vertical regulation track, two vertical regulation track are last to be erect and to be equipped with two can follow the gliding layering of vertical regulation track. The utility model has the advantages of stable and reliable performance, good fixing effect and wide application range.
Description
Technical Field
The utility model relates to a ceramic plate produces processing equipment technical field, concretely relates to dull and stereotyped sintering frock of jumbo size pottery.
Background
The ceramic flat plate can be widely applied to various fields due to weather resistance, stability and high wear resistance, and can be used in a normal environment and a severe working environment with high temperature, high pressure and easy corrosion. Along with the development of science and technology, the enterprise is increasingly big to the demand of ceramic flat board, and gathers at the production and processing of ceramic flat board, and the sintering is especially crucial, need use the fritting furnace among the sintering process, puts into the fritting furnace behind the frock clamping with ceramic raw materials and carries out high temperature sintering, but the frock simple structure that uses among the current sintering process, fixed reliability is low, can lead to the product to take place the skew at upset, displacement in-process, leads to sintering product quality unstable.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a dull and stereotyped sintering frock of jumbo size pottery.
A large-size ceramic flat plate sintering tool comprises a tool frame, wherein a clamping area is formed in the tool frame in a surrounding mode, first clamping structures are arranged on the left side and the right side of the top surface and the left side and the right side of the bottom surface of the tool frame, and a second clamping structure is arranged in the middle of the tool frame; the first clamping structure comprises a first sliding groove formed in the surface of the tool frame, and a mounting base bar clamped in the first sliding groove, wherein a vertical positioning rod is arranged on the mounting base bar, and a pressing block capable of being fixed at any position on the vertical positioning rod is arranged on the vertical positioning rod; the second clamping structure comprises two mounting boxes which are arranged at the front part of the tool frame and the rear part of the tool frame in a penetrating mode respectively, an upper fixing rail and a lower fixing rail which extend out of the top surface and the bottom surface of the mounting box respectively are arranged inside the mounting boxes in a penetrating mode, the upper fixing rail and the lower fixing rail can slide in the mounting boxes, the upper fixing rail and the lower fixing rail are arranged in a surrounding mode to form a vertical adjusting rail, and the vertical adjusting rail is provided with two pressing strips which can slide along the vertical adjusting rail in an erected mode. In the whole sintering tool, a clamping area is used for placing ceramic flat plates to be sintered, wherein first clamping structures respectively positioned on the left side and the right side of the top surface and the left side and the right side of the bottom surface of a tool frame are used for clamping the left side and the right side of the top surface and the left side and the right side of the bottom surface of the ceramic flat plates to be sintered respectively through pressing blocks so as to fasten the whole ceramic flat plates to be sintered; furthermore, the middle part of the tool frame is provided with a second clamping structure, so that the middle parts of the top surface and the bottom surface of the ceramic flat plate to be sintered are clamped and maintained by the two pressing strips at the same time, the whole ceramic flat plate to be sintered is uniformly clamped, and the large-size ceramic flat plate to be sintered is prevented from shifting in the overturning and displacement processes; more importantly, the second clamping structure can come from the length of adjusting the vertical adjusting track through the up-and-down movement of the upper fixing track and the lower fixing track, so that the movable range of the pressing strip is changed, the clamping range is further enlarged, and the use experience is improved.
Preferably, the tool frame comprises a first frame located on the left side, a second frame located on the front side, a third frame located on the right side and a fourth frame located on the rear side, and the first frame, the first frame and the first frame are arranged in a surrounding manner to form the clamping area; the first frame and the third frame are respectively provided with the first sliding grooves; the second frame and the fourth frame are respectively provided with the mounting box in a penetrating mode. The first frame, the second frame, the third frame and the fourth frame are arranged in a surrounding mode to form a clamping area, and meanwhile, a mounting platform for the first clamping structure and the second clamping structure is formed.
Preferably, the upper fixing rail comprises a first upper mounting rod and a second upper mounting rod which are arranged in the mounting box in a penetrating mode, an upper sealing strip is arranged at the tops of the first upper mounting rod and the second upper mounting rod, and the pressing strip is arranged between the upper sealing strip and the first upper mounting rod and between the first upper mounting rod and the second upper mounting rod. And a part of vertical adjusting track is formed by enclosing the upper seal, the first upper mounting rod and the second upper mounting rod, and the pressing strip can slide up and down along the part of vertical adjusting track.
Preferably, the lower fixing rail comprises a first lower mounting rod and a second lower mounting rod which are arranged in the mounting box in a penetrating mode, a lower sealing strip is arranged at the top of the first lower mounting rod and the top of the second lower mounting rod, and the pressing strip is arranged between the lower sealing strip and the first lower mounting rod and the second lower mounting rod. Similarly, another part of vertical adjusting track is formed by enclosing the lower seal, the first lower mounting rod and the second lower mounting rod, and the pressing strip can slide up and down along the part of vertical adjusting track.
Preferably, the first upper mounting rod, the second upper mounting rod, the first lower mounting rod and the second lower mounting rod are provided with second sliding grooves, and the pressing strip is clamped into the second sliding grooves. The pressing strip is clamped into the second sliding groove, so that the limiting of the pressing strip is realized, and the stability of up-and-down sliding is improved.
Preferably, the center of the pressing strip is provided with a thermal deformation pore channel, and the cross section of the pressing strip is rectangular. In the high-temperature sintering process, the heating area of the pressing strip is large, so that the structural strength of the pressing strip is improved by using a thermal deformation pore channel, and deformation and fracture are prevented.
Preferably, the second clamping structure is provided with a plurality of clamping structures. The clamping stability and reliability can be improved by the second clamping structures.
Preferably, the pressing block is provided with a thread fixing structure, and the thread fixing structure is used for fixing the pressing block at any position on the vertical positioning rod. After the thread fixing structure is screwed, the pressing block is fixed on the vertical positioning rod, and after the thread fixing structure is loosened, the pressing block can move along the vertical positioning rod.
Preferably, the outer side of the tool frame is provided with a lifting structure, and the lifting structure is used for driving the tool frame to move up and down. The lifting structure can adjust the height of the whole tool frame.
The beneficial effects of the utility model embody:
in the utility model, the clamping area is used for placing the ceramic flat plate to be sintered, wherein, the first clamping structures respectively positioned at the left and right sides of the top surface and the left and right sides of the bottom surface of the tool frame respectively clamp the left and right sides of the top surface and the left and right sides of the bottom surface of the ceramic flat plate to be sintered through the pressing block so as to fasten the whole ceramic flat plate to be sintered, in particular, through the first sliding groove, the installation base strip can slide along the first sliding groove and be fixed at any position in the first sliding groove, so that the horizontal position of the installation base strip can be adjusted, through arranging the vertical positioning rod on the installation base strip, the whole pressing block can move up and down along the vertical positioning rod and be fixed at any position on the vertical positioning rod, so that the pressing block is positioned at any position in the space, and the reliable fastening of the ceramic flat plates to be sintered of various sizes is realized; furthermore, the middle part of the tool frame is provided with a second clamping structure, so that the middle parts of the top surface and the bottom surface of the ceramic flat plate to be sintered are clamped and maintained by the two pressing strips at the same time, the whole ceramic flat plate to be sintered is uniformly clamped, and the large-size ceramic flat plate to be sintered is prevented from shifting in the overturning and displacement processes; more importantly, the second clamping structure can come from the length of adjusting the vertical adjusting track through the up-and-down movement of the upper fixing track and the lower fixing track, so that the movable range of the pressing strip is changed, the clamping range is further enlarged, and the use experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a front view of the present invention;
fig. 2 is a top view of the structure of the present invention.
Reference numerals are as follows:
1-a tooling frame, 11-a clamping area, 12-a first frame, 13-a second frame, 14-a third frame, 15-a fourth frame, 16-a lifting structure, 2-a first clamping structure, 21-a first sliding groove, 22-a mounting base strip, 23-a vertical positioning rod, 24-a pressing block, 241-a threaded fixing structure, 3-a second clamping structure, 31-a mounting box, 32-an upper fixing rail, 321-a first upper mounting rod, 322-a second upper mounting rod, 323-an upper sealing strip, 33-a lower fixing rail, 331-a first lower mounting rod, 332-a second lower mounting rod, 333-a lower sealing strip, 34-a vertical adjusting rail, 35-a pressing strip and 351-a thermal deformation pore channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "outside", "upper", and the like are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the utility model is conventionally placed when in use, and are only for convenience of describing the utility model and simplifying the description, but not for indicating or implying that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the large-size ceramic flat plate sintering tool comprises a tool frame 1, wherein a clamping area 11 is formed in the tool frame 1 in an enclosing manner, first clamping structures 2 are arranged on the left side and the right side of the top surface and the left side and the right side of the bottom surface of the tool frame 1, and a second clamping structure 3 is arranged in the middle of the tool frame 1; the first clamping structure 2 comprises a first sliding groove 21 formed in the surface of the tool frame 1, and a mounting base bar 22 clamped in the first sliding groove 21, wherein a vertical positioning rod 23 is arranged on the mounting base bar 22, and a pressing block 24 capable of being fixed at any position on the vertical positioning rod 23 is arranged on the vertical positioning rod 23; the second clamping structure 3 includes that two wear to establish respectively at the anterior mounting box 31 at 1 rear portion of frock frame and frock frame, mounting box 31 is inside to wear to be equipped with last fixed track 32 and the fixed track 33 down that extends mounting box 31 top surface and bottom surface respectively, it can slide in mounting box 31 with fixed track 33 down to go up fixed track 32, go up fixed track 32 and fixed track 33 down and enclose and establish vertical regulation track 34 of formation, two vertical regulation track 34 erects and is equipped with two can follow the gliding layering 35 of vertical regulation track 34.
In this embodiment, it should be noted that, in the whole sintering tool, the clamping area 11 is used for placing the ceramic flat plate to be sintered, wherein, the first clamping structures 2 respectively positioned at the left and right sides of the top surface and the left and right sides of the bottom surface of the tool frame 1 respectively clamp the left and right sides of the top surface and the left and right sides of the bottom surface of the ceramic flat plate to be sintered through the pressing blocks 24 so as to fasten the whole ceramic flat plate to be sintered, in particular, by the first slide groove 21, the mount base 22 can be slid along the first slide groove 21, and fixed at any position in the first sliding groove 21, realizing the adjustment of the horizontal position of the installation base strip 22, by arranging the vertical positioning rod 23 on the installation base strip 22, the whole pressing block 24 can move up and down along the vertical positioning rod 23 and be fixed at any position on the vertical positioning rod 23, so that the pressing block 24 is positioned at any position in the space, and the ceramic flat plates to be sintered with various sizes are reliably fastened; furthermore, the second clamping structure 3 is arranged in the middle of the tool frame 1, so that the two pressing strips 35 can clamp and maintain the middle of the top surface and the middle of the bottom surface of the ceramic flat plate to be sintered at the same time, the whole ceramic flat plate to be sintered can be uniformly clamped, and the large-size ceramic flat plate to be sintered can not deviate in the overturning and displacement processes; more importantly, the second clamping structure 3 can freely adjust the length of the vertical adjusting rail 34 by moving the upper fixing rail 32 and the lower fixing rail 33 up and down, so that the movable range of the pressing bar 35 is changed, the clamping range is further enlarged, and the use experience is improved.
Specifically, the tool frame 1 comprises a first frame 12 positioned on the left side, a second frame 13 positioned on the front side, a third frame 14 positioned on the right side and a fourth frame 15 positioned on the rear side, and the first frame 12, the first frame 12 and the first frame 12 enclose to form a clamping area 11; wherein, the first frame 12 and the third frame 14 are respectively provided with a first sliding groove 21; the second frame 13 and the fourth frame 15 are respectively provided with a mounting box 31.
In the present embodiment, the first frame 12, the second frame 13, the third frame 14, and the fourth frame 15 surround to form the mounting area 11, and form a mounting platform for the first mounting structure 2 and the second mounting structure 3.
Specifically, the upper fixing rail 32 includes a first upper mounting rod 321 and a second upper mounting rod 322 penetrating through the inside of the mounting box 31, an upper seal 323 is disposed on the top of the first upper mounting rod 321 and the second upper mounting rod 322, and a pressing strip 35 is disposed between the upper seal 323, the first upper mounting rod 321 and the second upper mounting rod 322.
In this embodiment, a part of the vertical adjusting rail 34 is enclosed between the upper seal 323, the first upper mounting rod 321 and the second upper mounting rod 322, and the pressing strip 35 can slide up and down along the part of the vertical adjusting rail 34.
Specifically, the lower fixing rail 33 includes a first lower mounting rod 331 and a second lower mounting rod 332 penetrating the inside of the mounting box 31, a lower seal 333 is disposed on the top of the first lower mounting rod 331 and the second lower mounting rod 332, and a pressing strip 35 is disposed between the lower seal 333, the first lower mounting rod 331 and the second lower mounting rod 332.
In the present embodiment, similarly, another part of the vertical adjusting rail 34 is enclosed between the lower seal 333, the first lower mounting rod 331 and the second lower mounting rod 332, and the pressing bar 35 can slide up and down along the part of the vertical adjusting rail 34.
Specifically, the first upper mounting rod 321, the second upper mounting rod 322, the first lower mounting rod 331 and the second lower mounting rod 332 are all provided with second sliding grooves, and the pressing strip 35 is clamped in the second sliding grooves.
In this embodiment, it should be noted that the pressing strip 35 is clamped into the second sliding groove, so that the pressing strip 35 is limited, and the stability of vertical sliding is improved.
Specifically, the center of the bead 35 is provided with a thermal deformation hole 351, and the cross section of the bead 35 is rectangular.
In the present embodiment, it should be noted that, since the bead 35 has a large heat receiving area during the high-temperature sintering process, the thermal deformation duct 351 needs to be used to improve the structural strength of the bead itself and prevent the bead from being deformed and broken.
Specifically, the second clamping structure 3 is provided in plurality.
In the present embodiment, it should be noted that the plurality of second clamping structures 3 can improve clamping stability and reliability.
Specifically, a thread fixing structure 241 is arranged on the pressing block 24, and the thread fixing structure 241 is used for fixing the pressing block 24 at any position on the vertical positioning rod 23.
In the present embodiment, the pressing block 24 is fixed to the vertical positioning rod 23 after the screw fixing structure 241 is tightened, and the pressing block 24 can move along the vertical positioning rod 23 after the screw fixing structure 241 is loosened.
Specifically, the outer side of the tool frame 1 is provided with a lifting structure 16, and the lifting structure 16 is used for driving the tool frame 1 to move up and down.
In the present embodiment, the elevation structure 16 can adjust the height of the entire tool frame 1.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. The large-size ceramic flat plate sintering tool is characterized by comprising a tool frame, wherein a clamping area is formed in the tool frame in an enclosing mode, first clamping structures are arranged on the left side and the right side of the top surface and the left side and the right side of the bottom surface of the tool frame, and a second clamping structure is arranged in the middle of the tool frame; wherein,
the first clamping structure comprises a first sliding groove formed in the surface of the tool frame, and a mounting base bar clamped in the first sliding groove, wherein a vertical positioning rod is arranged on the mounting base bar, and a pressing block capable of being fixed at any position on the vertical positioning rod is arranged on the vertical positioning rod;
the second clamping structure comprises two mounting boxes which are arranged at the front part of the tool frame and the rear part of the tool frame in a penetrating mode respectively, an upper fixing rail and a lower fixing rail which extend out of the top surface and the bottom surface of the mounting box respectively are arranged inside the mounting boxes in a penetrating mode, the upper fixing rail and the lower fixing rail can slide in the mounting boxes, the upper fixing rail and the lower fixing rail are arranged in a surrounding mode to form a vertical adjusting rail, and the vertical adjusting rail is provided with two pressing strips which can slide along the vertical adjusting rail in an erected mode.
2. The large-size ceramic flat plate sintering tool according to claim 1, wherein the tool frame comprises a first frame located on the left side, a second frame located on the front side, a third frame located on the right side and a fourth frame located on the rear side, and the first frame, the second frame, the third frame and the fourth frame are arranged in a surrounding mode to form the clamping area; wherein,
the first frame and the third frame are respectively provided with the first sliding grooves;
the second frame and the fourth frame are respectively provided with the mounting box in a penetrating mode.
3. The large-size ceramic flat plate sintering tool according to claim 2, wherein the upper fixing rail comprises a first upper mounting rod and a second upper mounting rod which are arranged inside the mounting box in a penetrating mode, upper sealing strips are arranged at the tops of the first upper mounting rod and the second upper mounting rod, and the pressing strips are arranged among the upper sealing strips, the first upper mounting rod and the second upper mounting rod.
4. The large-size ceramic flat plate sintering tool according to claim 3, wherein the lower fixing rail comprises a first lower mounting rod and a second lower mounting rod which are arranged inside the mounting box in a penetrating mode, lower sealing strips are arranged at the tops of the first lower mounting rod and the second lower mounting rod, and the pressing strips are arranged among the lower sealing strips, the first lower mounting rod and the second lower mounting rod.
5. The large-size ceramic flat plate sintering tool according to claim 4, wherein second sliding grooves are formed in the first upper mounting rod, the second upper mounting rod, the first lower mounting rod and the second lower mounting rod, and the pressing strip is clamped into the second sliding grooves.
6. The large-size ceramic flat plate sintering tool according to claim 2, wherein a thermal deformation hole is formed in the center of the pressing strip, and the cross section of the pressing strip is rectangular.
7. The large-size ceramic flat plate sintering tool according to claim 2, wherein a plurality of second clamping structures are arranged.
8. The large-size ceramic flat plate sintering tool according to claim 2, wherein a thread fixing structure is arranged on the pressing block, and the thread fixing structure is used for fixing the pressing block at any position on the vertical positioning rod.
9. The large-size ceramic flat plate sintering tool according to claim 2, wherein a lifting structure is arranged on the outer side of the tool frame and used for driving the tool frame to move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220665576.XU CN217275610U (en) | 2022-03-24 | 2022-03-24 | Large-size ceramic flat plate sintering tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220665576.XU CN217275610U (en) | 2022-03-24 | 2022-03-24 | Large-size ceramic flat plate sintering tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217275610U true CN217275610U (en) | 2022-08-23 |
Family
ID=82869767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220665576.XU Active CN217275610U (en) | 2022-03-24 | 2022-03-24 | Large-size ceramic flat plate sintering tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217275610U (en) |
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2022
- 2022-03-24 CN CN202220665576.XU patent/CN217275610U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A large-sized ceramic flat sintering fixture Effective date of registration: 20230828 Granted publication date: 20220823 Pledgee: Industrial Bank Co.,Ltd. Shanghai Jiading sub branch Pledgor: Shanghai Unite Technology Co.,Ltd. Registration number: Y2023310000488 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |