CN107511961A - A kind of device to the automatic heating of Insulating heat shrink - Google Patents
A kind of device to the automatic heating of Insulating heat shrink Download PDFInfo
- Publication number
- CN107511961A CN107511961A CN201710931931.7A CN201710931931A CN107511961A CN 107511961 A CN107511961 A CN 107511961A CN 201710931931 A CN201710931931 A CN 201710931931A CN 107511961 A CN107511961 A CN 107511961A
- Authority
- CN
- China
- Prior art keywords
- heating
- roller
- heat shrink
- insulating heat
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- 238000005485 electric heating Methods 0.000 claims abstract description 29
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 41
- 229910052802 copper Inorganic materials 0.000 description 41
- 239000010949 copper Substances 0.000 description 41
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000837 restrainer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/008—Handling preformed parts, e.g. inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/002—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/007—Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses a kind of device to the automatic heating of Insulating heat shrink, belong to regulator cubicle field, it mainly includes：Support, heating chamber, roller, position-limit mechanism, feed mechanism and control cabinet, the heating chamber is arranged on support, roller is provided with the middle part of heating chamber, heating chamber is separated into upper cavity and lower chamber by the roller, electric heating fan on multiple is evenly arranged with the upper cavity, multiple lower electric heating fans are evenly arranged with the lower chamber, the positive pair roller of blowing mouth of the multiple upper electric heating fan and multiple lower electric heating fans is set, in the front end of the heating chamber, limited position mechanism is set, the front end of the position-limit mechanism is provided with feed mechanism, the roller also includes drive device, the drive device of the roller, upper electric heating fan, it is lower to be electrically connected between electric heating fan and control cabinet.By the above-mentioned means, the present invention can improve the heating quality and the efficiency of heating surface of Insulating heat shrink.
Description
Technical field
The present invention relates to regulator cubicle field, more particularly to a kind of device to the automatic heating of Insulating heat shrink.
Background technology
Copper bar is also known as copper bus-bar or copper bus-bar, is made by copper material, rectangular cross-section or chamfering (fillet) rectangle
Long conductor, play a part of in circuit convey electric current and connect electrical equipment.Copper bar is in electrical equipment, particularly complete distribution
It is widely used in device.Copper bar to it in the electrical apparatus in use, in order to carry out insulation protection, often outside it
Side is arranged insulating sleeve, and current insulating sleeve is generally adopted by Insulating heat shrink, utilizes the characteristic of its heat shrinkable, bag
It is overlying on the outside of copper bar.
At present, generally use manual heating method with the Insulating heat shrink processing method on copper bar, i.e., first will insulation
Heat-shrinkable T bush is sheathed on the outside of copper bar, then with hair dryer or other firing equipments, manual heating is carried out to it.To the behaviour of personnel
It is required higher, labor intensity is larger, its security, and reliability is all preferable not to the utmost, and production efficiency is than relatively low.
The content of the invention
The present invention solves the technical problem of provide a kind of device to the automatic heating of Insulating heat shrink, Neng Gouti
The heating quality and the efficiency of heating surface of high Insulating heat shrink.
In order to solve the above technical problems, one aspect of the present invention is：There is provided a kind of to Insulating heat shrink
Automatically the device heated, mainly includes：Support, heating chamber, roller, position-limit mechanism, feed mechanism and control cabinet, the heating chamber
It is arranged on support, roller is provided with the middle part of heating chamber, heating chamber is separated into upper cavity and lower chamber by the roller,
Multiple upper electric heating fans are evenly arranged with the upper cavity, multiple lower electric heating fans are evenly arranged with the lower chamber, it is described
The positive pair roller of blowing mouth of multiple upper electric heating fans and multiple lower electric heating fans is set, and limited location is set in the front end of the heating chamber
Mechanism, feed mechanism is provided with the front end of the position-limit mechanism, and the roller also includes drive device, the driving of the roller
Electrically connected between device, upper electric heating fan, lower electric heating fan and control cabinet.
Preferably, the drive device of the roller includes driving-chain, motor and decelerator, and the motor is using servo electricity
Machine.
Preferably, every roller is evenly arranged with multiple spacing rings vertically, and the external diameter of the spacing ring is more than outside roller
Footpath, forms feeding-passage between adjacent spacing ring, and multiple feeding-passages can accommodate more copper bars simultaneously by passing through and setting limit
Position ring so that larger skew will not occur in course of conveying for copper bar, ensure that the stability of copper bar conveying.
Preferably, the front and rear opening of the heating chamber is respectively arranged with overhead door, plays a part of insulation.
Preferably, preheating cavity is provided between the heating chamber and position-limit mechanism, can further utilizes in heating chamber and dissipate
The heat issued, improve the efficiency of heating surface of Insulating heat shrink.
Preferably, a baffle plate is provided with the front opening of the preheating cavity, the height of the baffle plate is less than preheating cavity
Open height, the effect of baffle plate are to play certain heat-blocking action, and its height is less than the open height of preheating cavity, be in order to
Copper bar is set to smoothly enter preheating cavity.
Preferably, the position-limit mechanism puts hopper including multiple, is respectively arranged with block in each both sides for putting hopper, institute
The length for stating block is less than the length for putting hopper so that putting hopper rear and front end forms breach, the setting of breach, people easy to operation
Copper bar is smoothly put into by member to be put in hopper.
Preferably, the position for putting hopper is corresponding with the position of feeding-passage.
Preferably, the feed mechanism includes：Cylinder piston rod end is fixed in cylinder, push pedal and pushing block, the push pedal,
Cylinder piston rod is fixed on the center of push pedal side, and the quantity of the pushing block is corresponding with putting hopper, and pushing block is fixedly installed on
The opposite side of push pedal, copper bar is promoted using pushing block, copper bar is pushed into preheating cavity.
Preferably, temperature sensor is provided with the heating chamber, is electrically connected between the temperature sensor and control cabinet
Connect, monitor the temperature in heating chamber in real time.
The beneficial effects of the invention are as follows：The present invention 1, combined by the way of roller conveying with upper electric heating fan and lower electric heating fan
Structure so that the temperature in heating chamber is more balanced, it is possible to increase the heating effect of Insulating heat shrink；2nd, every roller is along axle
To multiple spacing rings are evenly arranged with, the external diameter of the spacing ring is more than roller external diameter, and it is logical to form charging between adjacent spacing ring
Road so that roller can once convey more copper bars simultaneously, improve the efficiency of heating surface.
Brief description of the drawings
Fig. 1 is a kind of front view of preferred embodiment of device one to the automatic heating of Insulating heat shrink of the invention；
Fig. 2 is shown Fig. 1 dimensional structure diagram；
Fig. 3 is shown Fig. 1 perspective view；
Fig. 4 is shown Fig. 3 dimensional structure diagram；
Fig. 5 is part B close-up schematic view in Fig. 4；
Fig. 6 is the dimensional structure diagram of another angles of shown Fig. 3；
Fig. 7 is part A close-up schematic view in shown Fig. 6；
The mark of each part is as follows in accompanying drawing：1st, support, 2, heating chamber, 3, roller, 4, preheating cavity, 6, position-limit mechanism, 7,
Feed mechanism, 8, overhead door, 21, upper cavity, 22, lower chamber, 31, spacing ring, 32, feeding-passage, 41, baffle plate, 51, upper electric heating
Fan, 52, lower electric heating fan, 61, put hopper, 62, block, 63, breach, 71, cylinder, 72, push pedal, 73, pushing block.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Fig. 1 and Fig. 2 are referred to, the embodiment of the present invention includes：
A kind of device to the automatic heating of Insulating heat shrink, mainly include：Support 1, heating chamber 2, roller 3, position restrainer
Structure 6, feed mechanism 7 and control cabinet, the heating chamber 2 are arranged on support 1, and roller 3, institute are provided with the middle part of heating chamber 2
State roller 3 and heating chamber is separated into upper cavity 21 and lower chamber 22, electric heating on three is evenly arranged with the upper cavity 21
Fan 51, three lower electric heating fans 52, described three upper electric heating fans 51 and three lower electric heating are evenly arranged with the lower chamber 22
The positive pair roller 3 of blowing mouth of fan 52 is set, and limited position mechanism 6 is set in the front end of the heating chamber 2, in the position-limit mechanism
6 front end is provided with feed mechanism 7, and the roller 3 also includes drive device (not shown), the driving dress of the roller 3
Put, electrically connected between upper electric heating fan 51, lower electric heating fan 52 and control cabinet.The drive device of the roller 3 includes driving-chain, electricity
Machine and decelerator, the motor use servomotor.As shown in figure 5, every roller 3 is evenly arranged with multiple spacing rings vertically
31, the external diameter of the spacing ring 31 is more than the external diameter of roller 3, and feeding-passage 32 is formed between adjacent spacing ring 31.Each charging is logical
Road 32 is used equally for conveying copper bar, and multiple feeding-passages can accommodate more copper bars simultaneously by the way that the conveying for improving copper bar is imitated
Rate.And conveyed using roller so that the bottom of copper bar also can effectively be heated, and then Insulating heat shrink is preferably wrapped
It is overlying on the outside of copper bar.
Further, the front and rear opening of the heating chamber 2 is respectively arranged with overhead door 8, the heating chamber 2 and position restrainer
Preheating cavity 4 is provided between structure 6, a baffle plate 41 is provided with the front opening of the preheating cavity 4, the height of the baffle plate 41 is small
In the open height of preheating cavity 4.After copper bar enters heating chamber 4, overhead door 8 declines, and plays a part of insulation.But
Also have a small amount of heat to come out by the gap between overhead door 8 and roller 3, now, increased preheating cavity 4 can be with
This partial heat is effectively utilized, preheating is played a part of to the Insulating heat shrink in preheating cavity 4, improves the thermal effect of equipment
Rate.
As shown in fig. 7, the position-limit mechanism 6 puts hopper 61 including three, position and the feeding-passage 32 of hopper 61 are put
Position is corresponding, and block 62 is respectively arranged with each both sides for putting hopper 61, and the length of the block 62, which is less than, puts hopper 61
Length to put hopper rear and front end and form breach 63.This is put hopper 61 and is used to place copper bar, and the effect of breach 63 is easy for
Copper bar is smoothly put into and put in hopper 61 by operating personnel.The feed mechanism 7 includes：Cylinder 71, push pedal 72 and pushing block 73, it is described
Cylinder piston rod end is fixed in push pedal 72, and cylinder piston rod is fixed on the center of the side of push pedal 72, the quantity of the pushing block 73
It is corresponding with putting hopper 61, and pushing block 73 is fixedly installed on the opposite side of push pedal 72, promotes copper bar using pushing block 73, copper bar is pushed away
Enter in preheating cavity 4.
The present invention operation principle be：Insulating heat shrink is placed on the outside of copper bar by operating personnel in advance first, by copper bar according to
It is secondary to be positioned over the putting in hopper 61 of position-limit mechanism, when it is each put be put into copper bar in hopper 61 after, cylinder 71 promote push pedal 72 to
Preceding motion, so as to which copper bar is pushed on the roller 3 of preheating cavity 4 by pushing block 73, by the conveying of roller 3, successively copper bar is passed through
Preheating cavity 4 and heating chamber 2, after copper bar enters in heating chamber 2, overhead door 8 declines, and the height for controlling it to decline so that
It must not hinder the rotation of roller 3 and spacing ring 31, while operating personnel put hopper by what second group of copper bar was put into position-limit mechanism
In 61, cylinder 71 promotes second group of copper bar to enter preheating cavity 4, and when second group of copper bar is close to heating chamber 2, overhead door 8 rises, copper
Discharge into heating chamber 4, by the heating of heating chamber 2, Insulating heat shrink is tightly coated on the outside of copper bar, the port of export of heating chamber 2
Overhead door 8 rise, roller 3 by copper bar send out heating chamber 4, complete heating cladding process.
In the present invention, electric heating fan is provided with the upper and lower cavity body of heating chamber 2 so that the temperature in heating chamber is more equal
Weighing apparatus；Meanwhile conveyed using roller so that the bottom of copper bar also can thermally equivalent, it is heated not to avoid Insulating heat shrink
Cause to coat the unbalanced problem of copper bar, improve the cladding quality of Insulating heat shrink.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of device to the automatic heating of Insulating heat shrink, it is characterised in that mainly include：Support, heating chamber, roller,
Position-limit mechanism, feed mechanism and control cabinet, the heating chamber are arranged on support, and roller is provided with the middle part of heating chamber, institute
State roller and heating chamber is separated into upper cavity and lower chamber, electric heating fan on multiple is evenly arranged with the upper cavity, in institute
State and multiple lower electric heating fans are evenly arranged with lower chamber, the equal face of blowing mouth of the multiple upper electric heating fan and multiple lower electric heating fans
Roller is set, and sets limited position mechanism in the front end of the heating chamber, the front end of the position-limit mechanism is provided with feed mechanism,
The roller also includes drive device, is electrically connected between the drive device of the roller, upper electric heating fan, lower electric heating fan and control cabinet
Connect.
A kind of 2. device to the automatic heating of Insulating heat shrink according to claim 1, it is characterised in that the roller
Drive device include driving-chain, motor and decelerator.
3. a kind of device to the automatic heating of Insulating heat shrink according to claim 1 or 2, it is characterised in that every
Roller is evenly arranged with multiple spacing rings vertically, and the external diameter of the spacing ring is more than roller external diameter, shape between adjacent spacing ring
Into feeding-passage.
A kind of 4. device to the automatic heating of Insulating heat shrink according to claim 1, it is characterised in that the heating
The front and rear opening of chamber is respectively arranged with overhead door.
5. a kind of device to the automatic heating of Insulating heat shrink according to claim 1 or 4, it is characterised in that described
Preheating cavity is provided between heating chamber and position-limit mechanism.
A kind of 6. device to the automatic heating of Insulating heat shrink according to claim 5, it is characterised in that the preheating
A baffle plate is provided with the front opening of chamber, the height of the baffle plate is less than the open height of preheating cavity.
7. a kind of device to the automatic heating of Insulating heat shrink according to claim 1, it is characterised in that described spacing
Hopper is put including multiple by mechanism, and block is respectively arranged with each both sides for putting hopper, and the length of the block, which is less than, puts hopper
Length to put hopper rear and front end and form breach.
8. a kind of device to the automatic heating of Insulating heat shrink according to claim 7, it is characterised in that described to put material
The position of groove is corresponding with the position of feeding-passage.
A kind of 9. device to the automatic heating of Insulating heat shrink according to claim 1, it is characterised in that the feeding
Mechanism includes：Cylinder piston rod end is fixed in cylinder, push pedal and pushing block, the push pedal, and cylinder piston rod is fixed on push pedal one
The center of side, the quantity of the pushing block is with putting that hopper is corresponding, and pushing block is fixedly installed on the opposite side of push pedal.
10. a kind of device to the automatic heating of Insulating heat shrink according to claim 1, it is characterised in that described
Temperature sensor is provided with heating chamber, is electrically connected between the temperature sensor and control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710931931.7A CN107511961A (en) | 2017-10-09 | 2017-10-09 | A kind of device to the automatic heating of Insulating heat shrink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710931931.7A CN107511961A (en) | 2017-10-09 | 2017-10-09 | A kind of device to the automatic heating of Insulating heat shrink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107511961A true CN107511961A (en) | 2017-12-26 |
Family
ID=60726958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710931931.7A Pending CN107511961A (en) | 2017-10-09 | 2017-10-09 | A kind of device to the automatic heating of Insulating heat shrink |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107511961A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533763A (en) * | 2018-12-30 | 2019-03-29 | 南通明光电线有限公司 | A kind of wiring copper sheet access shelf |
| CN111113929A (en) * | 2019-11-25 | 2020-05-08 | 芜湖侨云友星电气工业有限公司 | Heating device for assembling heat shrinkable sleeve |
| CN112590193A (en) * | 2020-10-20 | 2021-04-02 | 国网江苏省电力有限公司盐城供电分公司 | Quick heating and shaping device for electric insulation heat shrinkable sleeve |
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| JPH082820A (en) * | 1994-06-20 | 1996-01-09 | Nippon Steel Corp | Yarn guide method and device therefor |
| CN203740455U (en) * | 2014-03-07 | 2014-07-30 | 江苏凯联达电子科技有限公司 | Batch copper pipes uniformly feeding device |
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| CN207310348U (en) * | 2017-10-09 | 2018-05-04 | 苏州开关二厂有限公司 | A kind of device heated automatically to Insulating heat shrink |
-
2017
- 2017-10-09 CN CN201710931931.7A patent/CN107511961A/en active Pending
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| CN203740455U (en) * | 2014-03-07 | 2014-07-30 | 江苏凯联达电子科技有限公司 | Batch copper pipes uniformly feeding device |
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| Title |
|---|
| 任小中等: "《机械制造装备设计》", vol. 2, 华中科技大学出版社, pages: 380 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533763A (en) * | 2018-12-30 | 2019-03-29 | 南通明光电线有限公司 | A kind of wiring copper sheet access shelf |
| CN111113929A (en) * | 2019-11-25 | 2020-05-08 | 芜湖侨云友星电气工业有限公司 | Heating device for assembling heat shrinkable sleeve |
| CN111113929B (en) * | 2019-11-25 | 2022-01-11 | 芜湖侨云友星电气工业有限公司 | Heating device for assembling heat shrinkable sleeve |
| CN112590193A (en) * | 2020-10-20 | 2021-04-02 | 国网江苏省电力有限公司盐城供电分公司 | Quick heating and shaping device for electric insulation heat shrinkable sleeve |
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