CN107649579A - A kind of modular brazed-plate heat exchanger mould - Google Patents
A kind of modular brazed-plate heat exchanger mould Download PDFInfo
- Publication number
- CN107649579A CN107649579A CN201710893541.5A CN201710893541A CN107649579A CN 107649579 A CN107649579 A CN 107649579A CN 201710893541 A CN201710893541 A CN 201710893541A CN 107649579 A CN107649579 A CN 107649579A
- Authority
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- China
- Prior art keywords
- mold core
- lower mold
- mould
- brazed
- heat exchanger
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 239000000284 extract Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/02—Die constructions enabling assembly of the die parts in different ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
Abstract
The present invention relates to brazed-plate heat exchanger mould field, more particularly to a kind of modular brazed-plate heat exchanger mould, it is provided with the upper mould fixed plate for positioning the upper framed of upper mold core, upper mold core is arranged on framed inframe and is connected with upper mould fixed plate, two long sides of upper mold core are close to upper framed inner side edge, low mold frame for positioning lower mold core is installed in lower mold fixed plate, lower mold core is arranged on the inframe of low mold frame and is connected with lower mold fixed plate, two long sides of lower mold core are close to the inner side edge of low mold frame, upper mold core and lower mold core are split type splicing construction.Under same secondary mould bases, the compacting of the brazed-plate heat exchanger plate of different model can be only completed by the extraction or increase of standalone module, mould input cost substantially reduces.The machining accuracy and grinding precision of each standalone module are improved and control, the precision of mould are largely increased.
Description
Technical field
The present invention relates to brazed-plate heat exchanger mould field, more particularly to a kind of modular brazing-sheet type heat
Exchanger mould.
Background technology
At present, the appearance and size for the brazed-plate heat exchanger that each manufacturing enterprise is developed all is incrementally increasing, and it is made
The core made, the core rod size of the shaping mould of heat exchange plate are necessarily also incrementally increasing.Instantly, the shaping of these plates is suppressed
Mould is using the core rod of monoblock type.Due to the pressure-resistant 45bar of brazed-plate heat exchanger, and the thickness of heat exchange plate is very
It is thin, only 0.3 ~ 0.4mm, meanwhile, plate it is complex-shaped, dimensional accuracy is high, and plus the resilience of metal material in itself, this is to mould
The design of tool and the processing of shaping mould have high requirement.
And after core rod size increases, the foozle of Digit Control Machine Tool in itself will spread in core surface, special
It is not the mould fabricated with domestic CNC, influence is more directly perceived, and the manual errors that later stage mould pincers worker is ground to core rod also can
Expanded and accumulated with the increase of single core rod and lathe error in itself, the foozle of core rod cannot will have
The control of effect.This will directly affect the quality after heat exchange plate compacting, influence the final pressure-resistant performance of brazing-sheet type heat exchange and
Sealing property.Careful contrast is found simultaneously, the appearance and size of many brazed heat exchangers be all on width dimensions it is consistent, only
It is that length dimension has change, but each needs a set of different mould, mould input cost is very high.
Sealing property and pressure-resistant performance in order to ensure the brazed-plate heat exchanger of large-size, reduce the input of mould
Cost.The formed precision of plate has to effectively improve and control, and this just needs the foozle for reducing core rod, improves mould
The formed precision of tool, reduce the quantity of the mould of brazed-plate heat exchanger size overlapping region.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of modular brazed-plate heat exchanger into
Pattern has, according to most of brazed-plate heat exchanger width dimensions are basically identical in appearance and size the characteristics of, by upper mold core
Split type splicing construction is designed to drag, upper mold core and lower mold core are limited in upper framed and low mold frame respectively, profit
With the principle of " privileged site, identical decorative pattern ", upper mold core and lower mold core are divided into correspondingly solely according to same rule
Formwork erection block, i.e., each standalone module in upper mold core correspond to a standalone module in lower mold core, are using same secondary mould bases
Under the premise of, by reasonably docking decorative pattern after the extraction and increase between each standalone module, realize the soldering of different model
The compacting of the plate of heat-exchangers of the plate type.Because the machining accuracy and grinding precision of single standalone module are easy to ensure, therefore point
The core rod of body formula splicing construction is improved largely than the core rod of traditional monoblock type in machining accuracy and grinding precision, enters
One step ensure that the accuracy of manufacture and quality of brazed-plate heat exchanger plate.
To solve the above problems, the present invention provides following technical scheme：
A kind of modular brazed-plate heat exchanger mould, including upper mould fixed plate, lower mold fixed plate, upper mold core and under
Core rod, upper mold core and lower mold core are size identical rectangle structure, are provided with the upper mould fixed plate for positioning mould
Core it is upper framed, upper mold core is arranged on framed inframe and is connected with upper mould fixed plate, two long sides of upper mold core with
Upper framed inner side edge is close to, and the low mold frame for positioning lower mold core is provided with lower mold fixed plate, lower mold core is arranged on lower mould
The inframe of frame and be connected with lower mold fixed plate, two long sides of lower mold core are close to the inner side edge of low mold frame, upper mold core and
Lower mold core is split type splicing construction.
Preferably, the upper mold core and lower mold core include the multiple standalone modules split along its length, upper mold core
Standalone module can be fixed relative to upper mould fixed plate in upper framed interior slip, the standalone module of lower mold core relative to lower mould
Plate slides in low mold frame.
Preferably, upper two framed short side screw threads are combined with upper fastening bolt, and the upper fastening bolt is perpendicular to upper
Framed short side sets and extends to the short brink of inframe and upper mold core and offsets.
Preferably, two short side screw threads of the lower frame are combined with lower fastening bolt, and the lower fastening bolt is under
The end of frame does not set and extends to inframe and the short brink of lower mold core offsets.
Preferably, two long sides of the upper mold core are close to the side of upper mould fixed plate and are provided with the rib that stretches out, on
It is framed to be provided with the pressing groove coordinated with the rib in upper mold core.
Preferably, it is described framed to be fixedly connected by bolt with upper mould fixed plate.
Preferably, two long sides of the lower mold core are close to the side of lower mold fixed plate and are provided with the rib that stretches out, under
It is framed to be provided with the pressing groove coordinated with the rib in lower mold core.
Preferably, the low mold frame is fixedly connected by bolt with lower mold fixed plate.
Preferably, the short side both sides of the upper mold core are respectively equipped with a upper locating piece, and upper fastening bolt is compressed and positioned
The outside of block.
Preferably, the short side both sides of the lower mold core are respectively equipped with a lower locating piece, are positioned under lower tightened bolt presses
The outside of block.
Beneficial effect：
（1）Under same secondary mould bases, the brazing-sheet type heat of different model can be only completed by the extraction or increase of standalone module
The compacting of exchanger plate, the quantity of single product shaping mould greatly reduce, and mould input cost substantially reduces.
（2）The reduction of number of molds and the maintenance cost of mould connected can also substantially reduce, the utilization rate energy of forcing press
Enough greatly improve.
（3）After traditional monoblock type core rod is modified into the core rod of split splicing construction, the processing essence of each standalone module
Degree and grinding precision are improved and control, the precision of mould are largely increased.
（4）The dimensional accuracy and shape of heat exchange plate after shaping are that tolerance obtains accurate control, and plate quality is high.Assembling and
Into the pressure-resistant performance and sealing property of large-sized brazed-plate heat exchanger strengthened and control.
Brief description of the drawings
Fig. 1 is the cross section structure diagram of the present invention；
Fig. 2 is the dimensional structure diagram that upper mold core does not extract under standalone module state in the present invention；
Fig. 3 is the dimensional structure diagram that upper mold core extracts under standalone module state in the present invention；
Fig. 4 is the dimensional structure diagram that lower mold core does not extract under standalone module state in the present invention；
Fig. 5 is the dimensional structure diagram that lower mold core extracts under standalone module state in the present invention；
Fig. 6 is the scheme of installation of lower mold core and low mold frame in the present invention；
Description of reference numerals：Upper mould fixed plate 1, lower mold fixed plate 2, upper mold core 3, lower mold core 4, upper framed 5, low mold frame 6, tighten
Fixing bolt 7, lower fastening bolt 8, rib 9, upper locating piece 10, lower locating piece 11.
Embodiment
With reference to Figure of description and embodiment, the specific embodiment of the present invention is described in further detail：
Referring to figs. 1 to a kind of modular brazed-plate heat exchanger mould shown in Fig. 5, including upper mould fixed plate 1, under
Mould fixed plate 2, upper mold core 3 and lower mold core 4, upper mold core 3 and lower mold core 4 are size identical rectangle structure, and the upper mould is consolidated
Be provided with fixed board 1 for position upper mold core 3 upper framed 5, upper mold core 3 is arranged on framed 5 inframe and consolidated with upper mould
Fixed board 1 connects, and two long sides of upper mold core 3 are close to upper framed 5 inner side edge, is provided with lower mold fixed plate 2 for fixed
The low mold frame 6 of position lower mold core 4, lower mold core 4 are arranged on the inframe of low mold frame 6 and are connected with lower mold fixed plate 2, lower mold core 4
Two long sides are close to the inner side edge of low mold frame 6, and upper mold core 3 and lower mold core 4 are split type splicing construction.
The upper mold core 3 and lower mold core 4 include the multiple standalone modules split along its length, the independence of upper mold core 3
Module can be slided relative to upper mould fixed plate 1 in upper framed 5, and the standalone module of lower mold core 4 can be fixed relative to lower mould
Plate 2 slides in low mold frame 6.
The present invention according to most of brazed-plate heat exchanger width dimensions are basically identical in appearance and size the characteristics of, will
Upper mold core 3 and drag are designed to split type splicing construction, and upper mold core 3 and lower mold core 4 are limited in into upper framed 5 respectively with
In framed 6, the principle of " privileged site, identical decorative pattern " is utilized, upper mold core 3 and lower mold core 4 are divided into according to same rule
One-to-one standalone module, i.e., each standalone module in upper mold core 3 correspond to a standalone module in lower mold core 4, made
On the premise of with same secondary mould bases, by reasonably docking decorative pattern after the extraction and increase between each standalone module, realize
The compacting of the plate of the brazed-plate heat exchanger of different model.Because the machining accuracy and grinding precision of single standalone module are easy
In guarantee, therefore the core rod of split type splicing construction has than the core rod of traditional monoblock type in machining accuracy and grinding precision
Increase substantially, further ensure the accuracy of manufacture and quality of brazed-plate heat exchanger plate.
It should be noted that need to correspond to when detaching standalone module in upper mold core 3 and lower mold core 4 to detach the only of same position
Formwork erection block.
Described framed 5 two short side screw threads are combined with upper fastening bolt 7, and the upper fastening bolt 7 is perpendicular to upper framed 5
Short side set and extend to the short brink of inframe and upper mold core 3 and offset.
Two short side screw threads of the lower frame are combined with lower fastening bolt 8, and the lower fastening bolt 8 is perpendicular to lower frame
The short brink for not setting and extending to inframe and lower mold core 4 is held to offset.
The length dimension that standalone module all simply changes upper mold core 3 and lower mold core 4 is detached and increased, is typically to detach or increase
Plus core rod 3 and the standalone module in the centre position of lower mold core 4, exemplified by detaching standalone module, detach need after standalone module by
The position of other standalone modules is adjusted to fill up the vacancy after detaching and ensure decorative pattern in upper mold core 3 and lower mold core 4
Docking smooth-going.Consider the pressure balance for being in compacting plate, that is, ensure that the core rod that remaining standalone module is spliced is in mould
Center of Pressure.By screwing upper fastening bolt 7 and lower fastening bolt 8 to ensure the smooth-going of the stitching portion decorative pattern after detaching, lead to
Cross and ensure that the depth of the precession of the upper fastening bolt 7 of both sides on upper framed 5 is identical, it is ensured that the upper mold core 3 after reconfiguring is in
The Center of Pressure of mould；Identical, by ensureing that the precession depth of the lower fastening bolt 8 of both sides on lower module is identical, it is ensured that weight
Lower mold core 4 after Combination nova is in the Center of Pressure of mould, same to ensure that the lower mold core 4 after reconfiguring and upper mold core 3 align.
Standalone module is detached or is increased because upper mold core 3 in the present invention and lower mold core 4 need basis to be actually needed
To change the length dimension of upper mold core 3 and lower mold core 4, therefore upper mold core 3 and lower mold core 4 are not fixed directly by bolt with upper mould
Plate 1 or lower mold fixed plate 2 are fixedly connected.
Shown in reference picture 6, the fixation side of upper mold core 3 and lower mold core 4 in the present invention is introduced by taking the installation of lower mold core 4 as an example
Formula.
The side that two long sides of the upper mold core 3 are close to upper mould fixed plate 1 is provided with the rib 9 that stretches out, and upper framed 5
Provided with the pressing groove coordinated with the rib 9 in upper mold core 3.
Described framed 5 are fixedly connected by bolt with upper mould fixed plate 1.
The side that two long sides of the lower mold core 4 are close to lower mold fixed plate 2 is provided with the rib 9 to stretch out, low mold frame 6
Provided with the pressing groove coordinated with the rib 9 in lower mold core 4.
The low mold frame 6 is fixedly connected by bolt with lower mold fixed plate 2.
Upper framed 5 as the compressing member to upper mold core 3 in the present invention, upper mold core 3 is pressed on upper mould fixed plate 1, together
Lower mold core 4 is pressed in lower mold fixed plate 2 by the low mold frame 6 of sample, after extracting standalone module, passes through the He of precession upper fastening bolt 7
Lower fastening bolt 8 causes other standalone modules to be slided to mold center's position movement, rib 9 in pressing groove, serves guiding
The effect of bar.
The short side both sides of the upper mold core 3 are respectively equipped with a upper locating piece 10, and upper fastening bolt 7 compresses upper locating piece 10
Outside.
The short side both sides of the lower mold core 4 are respectively equipped with a lower locating piece 11, and lower fastening bolt 8 compresses lower locating piece 11
Outside.
Preferably, locating piece 10 on one, the front end of upper fastening bolt 7 are respectively arranged with the short side both sides of upper mold core 3
The outside of locating piece 10 in compression, the short side both sides of lower mold core 4 are respectively arranged with a lower locating piece 11, lower fastening bolt 8
Front end compresses the outside of lower locating piece 11, after detaching the module in upper mold core 3 and lower mold core 4, respectively by screwing upper fastening spiral shell
Bolt 7 and lower fastening bolt 8 to compress the outside of upper locating piece 10 and lower locating piece 11 laterally adjust and finely tune, and then cause
The remaining space that remaining module is filled up after detaching in upper mold core 3 and lower mold core 4 after detaching, and then cause upper mold core 3 and lower mould
Core 4 is reassembled into complete core rod, it is ensured that spliced upper mold core 3 and lower mold core 4 are in the Center of Pressure of mould again.
The above described is only a preferred embodiment of the present invention, any limit not is made to the technical scope of the present invention
System, therefore any subtle modifications, equivalent variations and modifications that every technical spirit according to the present invention is made to above example,
In the range of still falling within technical scheme.
Claims (10)
1. a kind of modular brazed-plate heat exchanger mould, including upper mould fixed plate（1）, lower mold fixed plate（2）, on
Core rod（3）And lower mold core（4）, upper mold core（3）And lower mold core（4）For size identical rectangle structure, it is characterised in that：It is described
Upper mould fixed plate（1）On be provided with for positioning upper mold core（3）It is upper framed（5）, upper mold core（3）It is arranged on framed（5）'s
Inframe and and upper mould fixed plate（1）Connection, upper mold core（3）Two long sides with it is upper framed（5）Inner side edge be close to, lower mould
Fixed plate（2）On be provided with for positioning lower mold core（4）Low mold frame（6）, lower mold core（4）It is arranged on low mold frame（6）Inframe
And with lower mold fixed plate（2）Connection, lower mold core（4）Two long sides and low mold frame（6）Inner side edge be close to, upper mold core
（3）And lower mold core（4）It is split type splicing construction.
A kind of 2. modular brazed-plate heat exchanger mould according to claim 1, it is characterised in that：It is described
Upper mold core（3）And lower mold core（4）Include the multiple standalone modules split along its length, upper mold core（3）Standalone module energy
Enough relative to upper mould fixed plate（1）Upper framed（5）Interior slip, lower mold core（4）Standalone module can be fixed relative to lower mould
Plate（2）In low mold frame（6）Interior slip.
A kind of 3. modular brazed-plate heat exchanger mould according to claim 2, it is characterised in that：It is described
It is upper framed（5）Two short side screw threads be combined with upper fastening bolt（7）, the upper fastening bolt（7）Perpendicular to upper framed（5）It is short
Side sets and extends to inframe and upper mold core（3）Short brink offset.
A kind of 4. modular brazed-plate heat exchanger mould according to claim 3, it is characterised in that：It is described
Two short side screw threads of lower frame are combined with lower fastening bolt（8）, the lower fastening bolt（8）Do not set perpendicular to the end of lower frame
And extend to inframe and lower mold core（4）Short brink offset.
A kind of 5. modular brazed-plate heat exchanger mould according to claim 4, it is characterised in that：It is described
Upper mold core（3）Two long sides be close to upper mould fixed plate（1）Side be provided with the rib that stretches out（9）, it is upper framed（5）It is provided with
With upper mold core（3）On rib（9）The pressing groove of cooperation.
A kind of 6. modular brazed-plate heat exchanger mould according to claim 5, it is characterised in that：It is described
It is upper framed（5）Pass through bolt and upper mould fixed plate（1）It is fixedly connected.
A kind of 7. modular brazed-plate heat exchanger mould according to claim 6, it is characterised in that：It is described
Lower mold core（4）Two long sides be close to lower mold fixed plate（2）Side be provided with the rib that stretches out（9）, low mold frame（6）It is provided with
With lower mold core（4）On rib（9）The pressing groove of cooperation.
A kind of 8. modular brazed-plate heat exchanger mould according to claim 7, it is characterised in that：It is described
Low mold frame（6）Pass through bolt and lower mold fixed plate（2）It is fixedly connected.
A kind of 9. modular brazed-plate heat exchanger mould according to claim 8, it is characterised in that：It is described
Upper mold core（3）Short side both sides be respectively equipped with a upper locating piece（10）, upper fastening bolt（7）Locating piece in compression（10）It is outer
Side.
A kind of 10. modular brazed-plate heat exchanger mould according to claim 9, it is characterised in that：Institute
State lower mold core（4）Short side both sides be respectively equipped with a lower locating piece（11）, lower fastening bolt（8）Compress lower locating piece（11）'s
Outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710893541.5A CN107649579B (en) | 2017-09-28 | 2017-09-28 | Modular brazing plate type heat exchanger forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710893541.5A CN107649579B (en) | 2017-09-28 | 2017-09-28 | Modular brazing plate type heat exchanger forming die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107649579A true CN107649579A (en) | 2018-02-02 |
| CN107649579B CN107649579B (en) | 2024-02-20 |
Family
ID=61116233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710893541.5A Active CN107649579B (en) | 2017-09-28 | 2017-09-28 | Modular brazing plate type heat exchanger forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107649579B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047434A (en) * | 2018-09-14 | 2018-12-21 | 江苏同生特钢制造有限公司 | A kind of stamping device of the special steel casting convenient for fixation |
| CN113714393A (en) * | 2021-09-03 | 2021-11-30 | 广东安居宝数码科技股份有限公司 | Edge covering die, using method and edge covering frame |
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| JPH1094839A (en) * | 1996-09-26 | 1998-04-14 | Mazda Motor Corp | Method and device for punching of plate |
| US20140352394A1 (en) * | 2013-05-29 | 2014-12-04 | Toyota Boshoku Kabushiki Kaisha | Press die |
| US20140352395A1 (en) * | 2013-05-29 | 2014-12-04 | Toyota Boshoku Kabushiki Kaisha | Press die |
| US20160361744A1 (en) * | 2015-06-15 | 2016-12-15 | Toyota Boshoku Kabushiki Kaisha | Press die apparatus |
| CN207414126U (en) * | 2017-09-28 | 2018-05-29 | 宁波特美科技有限公司 | A kind of modular brazed-plate heat exchanger molding die |
-
2017
- 2017-09-28 CN CN201710893541.5A patent/CN107649579B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1094839A (en) * | 1996-09-26 | 1998-04-14 | Mazda Motor Corp | Method and device for punching of plate |
| US20140352394A1 (en) * | 2013-05-29 | 2014-12-04 | Toyota Boshoku Kabushiki Kaisha | Press die |
| US20140352395A1 (en) * | 2013-05-29 | 2014-12-04 | Toyota Boshoku Kabushiki Kaisha | Press die |
| US20160361744A1 (en) * | 2015-06-15 | 2016-12-15 | Toyota Boshoku Kabushiki Kaisha | Press die apparatus |
| CN207414126U (en) * | 2017-09-28 | 2018-05-29 | 宁波特美科技有限公司 | A kind of modular brazed-plate heat exchanger molding die |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047434A (en) * | 2018-09-14 | 2018-12-21 | 江苏同生特钢制造有限公司 | A kind of stamping device of the special steel casting convenient for fixation |
| CN113714393A (en) * | 2021-09-03 | 2021-11-30 | 广东安居宝数码科技股份有限公司 | Edge covering die, using method and edge covering frame |
| CN113714393B (en) * | 2021-09-03 | 2024-02-02 | 广东安居宝数码科技股份有限公司 | Edge covering mold, using method and edge covering frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107649579B (en) | 2024-02-20 |
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