CN115091733A - Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube - Google Patents
Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube Download PDFInfo
- Publication number
- CN115091733A CN115091733A CN202210757546.6A CN202210757546A CN115091733A CN 115091733 A CN115091733 A CN 115091733A CN 202210757546 A CN202210757546 A CN 202210757546A CN 115091733 A CN115091733 A CN 115091733A
- Authority
- CN
- China
- Prior art keywords
- shrinkable tube
- heat shrinkable
- expansion
- equipment
- heat
- 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
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229920000139 polyethylene terephthalate Polymers 0.000 title claims description 21
- 239000005020 polyethylene terephthalate Substances 0.000 title claims description 21
- -1 polyethylene terephthalate Polymers 0.000 title claims description 3
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 20
- 239000011265 semifinished product Substances 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000009489 vacuum treatment Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention relates to the technical field of heat-shrinkable tubes, in particular to an expansion method of a high-crosslinking-degree PET heat-shrinkable tube, which comprises the following steps of firstly, carrying out sealing treatment on one end of the heat-shrinkable tube, and then sleeving a certain length of the heat-shrinkable tube on the surface of a conveying roller wheel when a tube tray for accommodating the heat-shrinkable tube is pulled out for a distance, so that the surface of the heat-shrinkable tube can orderly enter heat-shrinkable tube expansion equipment for carrying out the treatment of the following steps before being subjected to expansion treatment. According to the expansion method of the high-crosslinking-degree PET heat shrinkable tube, the filter element filter generates odor in the heat and heat shrinkable tube treatment effect in the heat shrinkable tube expansion equipment, and the filter element filter is started to operate in the form of an electric signal through the sensors on two sides of the heat shrinkable tube expansion equipment, so that the pollution gas generated in the heat shrinkable tube expansion equipment is subjected to a timely filtering treatment mode, and the external volatilization condition of too much pollution gas is avoided.
Description
Technical Field
The invention relates to the technical field of heat shrinkable tubes, in particular to an expansion method of a high-crosslinking-degree PET heat shrinkable tube.
Background
The heat shrinkable tube is generally produced by extrusion, irradiation and expansion, the expansion is an essential process in the production process of the heat shrinkable tube, the expansion modes widely used at present comprise an internal pressure method, a vacuum method and an internal pressure vacuum combination method, and the corresponding expansion modes are respectively selected according to the size and the material of a product.
The existing expanding machines are divided into a wet expanding machine and a dry expanding machine, wherein the wet expanding machine adopts a medium soaking heating mode to heat the heat shrinkable tube, a common heating medium is glycerol, but the dry expanding machine adopts air as the heating medium, and has the advantages of less environmental pollution, small energy consumption of unit products and the like, so the dry expanding machine is adopted to expand the heat shrinkable tube in recent years, but pollution gas is formed between high temperature and the heat shrinkable tube, effective measures for protecting the heat shrinkable tube are lacked, and the existing expanding production mode of the heat shrinkable tube has a continuous negative pressure expanding mode, the expanding mode adopts vacuum absorption in an expanding mould to cause negative pressure, so the heat shrinkable tube is expanded, the expanding method cannot solve medium-thickness tube expansion, and cannot solve high multiple product expansion of more than two times and five times, and is inefficient and uneconomical.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the expansion method of the high-crosslinking-degree PET heat-shrinkable tube, which has the advantages of environmental protection, skid resistance, stable expansion processing and the like, and solves the problems.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: an expansion method of a high-crosslinking-degree PET heat shrinkable tube comprises the following steps:
step one, processing preparation: firstly, one end of the heat shrinkable tube is sealed, then when the tube tray for accommodating the heat shrinkable tube is pulled out for a distance, the heat shrinkable tube can be sleeved on the surface of the conveying roller wheel by a certain length, so that the surface of the heat shrinkable tube can orderly enter the heat shrinkable tube expansion equipment for the treatment of the following steps before the heat shrinkable tube is subjected to the expansion treatment,
step two, pretreatment before heating: when the heat shrinkable tube enters the heat shrinkable tube expanding equipment through the conveying roller, the heat shrinkable tube is conveyed into a far infrared heater for heating and supplying, then the other end of the heat shrinkable tube is connected to heat shrinkable tube traction sealing equipment after passing through pressure-stabilizing heating equipment and a tube expanding mold, one end of the heated heat shrinkable tube automatically enters the heat shrinkable tube expanding equipment, and then the heat shrinkable tube is subjected to the next expansion and cooling shaping work in the pressure-stabilizing heating equipment,
step three, caliber expansion work: heating and conveying to a heat shrinkable tube expansion device in a semi-finished product state along the heat shrinkable tube, injecting pressure air into the heat shrinkable tube to be expanded, keeping the heat shrinkable tube in a positive pressure state, starting a tube expansion die and a heat shrinkable tube traction sealing device in the pressure stabilizing heating device and the heat shrinkable tube expansion device, and enabling the heat shrinkable tube to realize continuous heating and tube expansion operation in the tube expansion die by the heat shrinkable tube traction sealing device.
Step four, vacuum combined expansion processing: the expansion mould is connected with the vacuum treatment controller through the electromagnetic valve, the inner cavity of the expansion mould is intermittently sucked and deflated through the control of the electromagnetic valve, when the expansion mould is connected with the vacuum treatment controller, the expansion mould is deflated, and the inner cavity of the expansion mould is ensured to be always in a cooling state through the connection of the expansion mould and the cooling circulation equipment.
Step five, filtering and discharging treatment: when the heat shrinkable tube is processed through the steps, the heat in the heat shrinkable tube expansion equipment and the smell generated in the heat shrinkable tube treatment effect can pass through the inductors on two sides of the heat shrinkable tube expansion equipment to start the operation of the filter element filter in the form of an electric signal, and then the smell accumulation and the gathering are avoided during the expansion operation, so that the situation of difficult volatilization is avoided.
Step six, rolling and preparing the heat shrinkable tube: the pipe collecting machine is started and starts to collect pipes, when the pipe collecting length is reached, the stroke measuring and controlling device for detecting the length transmits an electric signal to the main control device, and the signal is sent to the electromagnetic valve and the pipe collecting machine according to the command, so that the expansion and winding processing work of the contracted pipes is completed.
The expansion method of the high-crosslinking-degree PET heat shrinkable tube comprises heat shrinkable tube expansion equipment, wherein the heat shrinkable tube expansion equipment comprises a far infrared heater, heat shrinkable tube traction sealing equipment, pressure-stabilizing heating equipment, a tube expansion mold and cooling circulation equipment, the heat shrinkable tube is introduced into the heat shrinkable tube expansion equipment through the heat shrinkable tube traction sealing equipment, the heat shrinkable tube traction sealing equipment is connected with the heat shrinkable tube traction sealing equipment after passing through the far infrared heater, the tube expansion mold and the cooling circulation equipment for automatic transmission processing, a semi-finished product of the heat shrinkable tube is heated to 140-180 ℃ through the far infrared heater and the pressure-stabilizing heating equipment, the heat shrinkable tube is conveyed to the heat shrinkable tube expansion equipment at the speed of 2 m/min-9 m/min by combining the heat shrinkable tube traction sealing equipment, the vacuum degree of the vacuum combined expansion processing is-0.06-0.08 MPa, and the semi-finished product of the heat shrinkable tube is rapidly expanded and cooled in the heat shrinkable tube expansion equipment by using cooling water at the temperature of 20-35 ℃ to form a finished product.
Preferably, the semi-finished product of the heat shrinkable tube is heated to 140 ℃ by a far infrared heater and a pressure-stabilizing heating device, and the heat shrinkable tube is conveyed to a heat shrinkable tube expanding device at the speed of 2 m/min by combining with a heat shrinkable tube traction sealing device.
Preferably, the vacuum degree of the vacuum joint expansion processing is-0.06 Mpa, and the semi-finished heat shrinkable tube is rapidly expanded and cooled to a finished heat shrinkable tube in a heat shrinkable tube expansion device by using cooling water with the temperature of 20 ℃.
Preferably, the semi-finished product of the heat shrinkable tube is heated to 180 ℃ by a far infrared heater and a pressure-stabilizing heating device, and the heat shrinkable tube is conveyed to a heat shrinkable tube expanding device at a speed of 9 m/min by combining with a heat shrinkable tube traction sealing device.
Preferably, the vacuum degree of the vacuum joint expansion processing is-0.08 Mpa, and the semi-finished heat shrinkable tube is rapidly expanded and cooled to a finished heat shrinkable tube in a heat shrinkable tube expansion device by using cooling water with the temperature of 35 ℃.
(III) advantageous effects
Compared with the prior art, the invention provides the expansion method of the high-crosslinking-degree PET heat-shrinkable tube, which has the following beneficial effects:
according to the expansion method of the high-crosslinking-degree PET heat shrinkable tube, the filter element filter generates odor in the heat and heat shrinkable tube treatment effect in the heat shrinkable tube expansion equipment, the filter element filter is started to operate in the form of an electric signal through the sensors on two sides of the heat shrinkable tube expansion equipment, so that a timely filtering treatment mode is performed on polluted gas generated in the expansion of the heat shrinkable tube in the heat shrinkable tube expansion equipment, the external volatilization condition of excessive polluted gas is avoided, the expansion mould is connected with the vacuum treatment controller through the electromagnetic valve, the inner cavity of the expansion mould is intermittently sucked and deflated through the control of the electromagnetic valve, and when the processes of expansion, tube collection and the like are intermittently and circularly performed, the pulling force on the tube during tube collection can be greatly reduced, and the effects of ideal shrinkage force and more reliable insulation sealing performance can be achieved in use.
Drawings
FIG. 1 is a schematic structural view of an expanding method of a highly crosslinked PET heat shrinkable tube according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a method for expanding a highly crosslinked PET heat shrinkable tube includes the following steps:
step one, processing preparation: firstly, one end of the heat shrinkable tube is sealed, then when the tube tray for accommodating the heat shrinkable tube is pulled out for a distance, the heat shrinkable tube can be sleeved on the surface of the conveying roller wheel by a certain length, so that the surface of the heat shrinkable tube can orderly enter the heat shrinkable tube expansion equipment for the treatment of the following steps before the heat shrinkable tube is subjected to the expansion treatment,
step two, pretreatment before heating: when the heat shrinkable tube enters the heat shrinkable tube expanding equipment through the conveying roller, the heat shrinkable tube is conveyed into a far infrared heater for heating and supplying, then the other end of the heat shrinkable tube is connected to heat shrinkable tube traction sealing equipment after passing through pressure-stabilizing heating equipment and a tube expanding mold, one end of the heated heat shrinkable tube automatically enters the heat shrinkable tube expanding equipment, and then the heat shrinkable tube is subjected to the next expansion and cooling shaping work in the pressure-stabilizing heating equipment,
step three, caliber expansion work: heating and conveying to a heat shrinkable tube expansion device in a semi-finished product state along the heat shrinkable tube, injecting pressure air into the heat shrinkable tube to be expanded, keeping the heat shrinkable tube in a positive pressure state, starting a tube expansion die and a heat shrinkable tube traction sealing device in the pressure stabilizing heating device and the heat shrinkable tube expansion device, and enabling the heat shrinkable tube to realize continuous heating and tube expansion operation in the tube expansion die by the heat shrinkable tube traction sealing device.
Step four, vacuum combined expansion processing: the expansion mould is connected with the vacuum processing controller through the electromagnetic valve, the inner cavity of the expansion mould is intermittently sucked and deflated through the control of the electromagnetic valve, when the expansion mould is connected with the vacuum processing controller, the expansion mould is deflated, and the connection of the expansion mould and the cooling circulation equipment ensures that the inner cavity of the expansion mould is always in a cooling state
Step five, filtering and discharging treatment: when the heat shrinkable tube is processed through the steps, the heat in the heat shrinkable tube expansion equipment and the smell generated in the heat shrinkable tube treatment effect can pass through the inductors on two sides of the heat shrinkable tube expansion equipment to start the operation of the filter element filter in the form of an electric signal, and then the smell accumulation and the gathering are avoided during the expansion operation, so that the situation of difficult volatilization is avoided.
Step six, rolling and preparing the heat shrinkable tube: when the length of the pipe is reached, the stroke measuring and controlling device for detecting the length transmits an electric signal to the main control device, and the signal is sent to the electromagnetic valve and the pipe collecting machine according to the command, so that the expansion and winding of the contracted pipe are completed.
The heat shrinkable tube expansion equipment comprises a far infrared heater, heat shrinkable tube traction sealing equipment, pressure-stabilizing heating equipment, a tube expansion die and cooling circulation equipment, wherein the heat shrinkable tube is introduced into the heat shrinkable tube expansion equipment through the heat shrinkable tube traction sealing equipment, the heat shrinkable tube is connected with the heat shrinkable tube traction sealing equipment for automatic transmission processing after passing through the far infrared heater, the tube expansion die and the cooling circulation equipment, a semi-finished heat shrinkable tube is heated to 140 ℃ through the far infrared heater and the pressure-stabilizing heating equipment, the heat shrinkable tube is conveyed to the heat shrinkable tube expansion equipment at the speed of 2 m/min by combining the heat shrinkable tube traction sealing equipment, the vacuum degree of vacuum joint expansion processing is-0.06 MPa, and the semi-finished heat shrinkable tube is rapidly expanded and cooled to a finished heat shrinkable tube in the heat shrinkable tube expansion equipment by using cooling water at the temperature of 20-35 ℃.
Example two
Referring to fig. 1, a method for expanding a highly crosslinked PET heat shrinkable tube includes the following steps:
step one, processing preparation: firstly, one end of the heat shrinkable tube is sealed, then when the tube tray for accommodating the heat shrinkable tube is pulled out for a distance, the heat shrinkable tube can be sleeved on the surface of the conveying roller wheel by a certain length, so that the surface of the heat shrinkable tube can orderly enter the heat shrinkable tube expansion equipment for the treatment of the following steps before the heat shrinkable tube is subjected to the expansion treatment,
step two, pretreatment before heating: when the heat shrinkable tube enters the heat shrinkable tube expanding equipment through the conveying roller, the heat shrinkable tube is conveyed into a far-infrared heater for heating and supplying, then the other end of the heat shrinkable tube is connected to heat shrinkable tube traction sealing equipment after passing through pressure-stabilizing heating equipment and a tube expanding mold, one end of the heated heat shrinkable tube automatically enters the heat shrinkable tube expanding equipment, and then the heat shrinkable tube is subjected to next expansion and cooling shaping work in the pressure-stabilizing heating equipment,
step three, caliber expansion work: carry to pyrocondensation pipe expansion equipment with the heating of semi-manufactured goods state along the pyrocondensation pipe, with pressure air injection plan in the pyrocondensation pipe that expands to keep being in the malleation state in the pyrocondensation pipe, start pipe expansion mould and the pyrocondensation pipe in steady voltage heating equipment, the pyrocondensation pipe expansion equipment and pull sealing equipment, the pyrocondensation pipe pulls sealing equipment and makes the pyrocondensation pipe realize constantly heating in succession and the pipe expansion operation in the pipe expansion mould.
Step four, vacuum combined expansion processing: the expansion mould is connected with the vacuum treatment controller through an electromagnetic valve, the inner cavity of the expansion mould is intermittently sucked and deflated through the control of the electromagnetic valve, when the expansion mould is connected with the vacuum treatment controller, the expansion mould is deflated, and the connection of the expansion mould and the cooling circulation equipment ensures that the inner cavity of the expansion mould is always in a cooling state
Step five, filtering and discharging treatment: during the processing of above step of pyrocondensation pipe process, the heat in the pyrocondensation pipe expansion equipment and the smell that produces in the pyrocondensation pipe treatment effect can pass through the inductor of pyrocondensation pipe expansion equipment both sides to the form of signal of telecommunication starts filter core filter operation work, later avoids appearing the smell and gathers together, the difficult volatile condition during expansion work.
Step six, rolling and preparing the heat shrinkable tube: the pipe collecting machine is started and starts to collect pipes, when the pipe collecting length is reached, the stroke measuring and controlling device for detecting the length transmits an electric signal to the main control device, and the signal is sent to the electromagnetic valve and the pipe collecting machine according to the command, so that the expansion and winding processing work of the contracted pipes is completed.
The heat shrinkable tube expansion equipment comprises a far infrared heater, heat shrinkable tube traction sealing equipment, pressure-stabilizing heating equipment, a tube expansion die and cooling circulation equipment, wherein the heat shrinkable tube is introduced into the heat shrinkable tube expansion equipment through the heat shrinkable tube traction sealing equipment, the heat shrinkable tube is connected with the heat shrinkable tube traction sealing equipment for automatic transmission processing after passing through the far infrared heater, the tube expansion die and the cooling circulation equipment, a semi-finished heat shrinkable tube is heated to 180 ℃ through the far infrared heater and the pressure-stabilizing heating equipment, the heat shrinkable tube is conveyed to the heat shrinkable tube expansion equipment at a speed of 9 m/min by combining the heat shrinkable tube traction sealing equipment, the vacuum degree of vacuum joint expansion processing is-0.08 MPa, and the semi-finished heat shrinkable tube is rapidly expanded and cooled to a finished heat shrinkable tube in the heat shrinkable tube expansion equipment by utilizing cooling water with the temperature of 35 ℃.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
In summary, in the expanding method of the high-crosslinking degree PET heat shrinkable tube, the filter element filter of the invention generates heat in the heat shrinkable tube expanding device and odor generated in the heat shrinkable tube treatment effect, the sensor at the two sides of the heat shrinkable tube expanding device starts the filter element filter to operate in the form of electric signals, thereby timely filtering the polluted gas generated in the expansion of the heat shrinkable tube by the heat shrinkable tube expansion equipment, avoiding the volatilization of excessive polluted gas, connecting the expansion mould with the vacuum treatment controller through the electromagnetic valve, the inner cavity of the expansion die is intermittently sucked and deflated by controlling the electromagnetic valve, so that when processes of expanding, retracting and the like are intermittently and circularly carried out, the pipe drawing force during pipe collection can be greatly reduced, and the effects of ideal shrinkage force and more reliable insulation sealing performance can be achieved in use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An expansion method of a high-crosslinking-degree PET heat shrinkable tube comprises the following steps:
step one, processing preparation: firstly, sealing one end of the heat shrinkable tube, then when the tube disc for accommodating the heat shrinkable tube is pulled out for a distance, sleeving the heat shrinkable tube with a certain length on the surface of the conveying roller wheel so that the surface of the heat shrinkable tube can orderly enter the heat shrinkable tube expansion equipment for the treatment of the following steps before the expansion treatment,
step two, pretreatment before heating: when the heat shrinkable tube enters the heat shrinkable tube expanding equipment through the conveying roller, the heat shrinkable tube is conveyed into a far infrared heater for heating and supplying, then the other end of the heat shrinkable tube is connected to heat shrinkable tube traction sealing equipment after passing through pressure-stabilizing heating equipment and a tube expanding mold, one end of the heated heat shrinkable tube automatically enters the heat shrinkable tube expanding equipment, and then the heat shrinkable tube is subjected to the next expansion and cooling shaping work in the pressure-stabilizing heating equipment,
step three, caliber expansion work: carry to pyrocondensation pipe expansion equipment with the heating of semi-manufactured goods state along the pyrocondensation pipe, with pressure air injection plan in the pyrocondensation pipe that expands to keep being in the malleation state in the pyrocondensation pipe, start pipe expansion mould and the pyrocondensation pipe in steady voltage heating equipment, the pyrocondensation pipe expansion equipment and pull sealing equipment, the pyrocondensation pipe pulls sealing equipment and makes the pyrocondensation pipe realize constantly heating in succession and the pipe expansion operation in the pipe expansion mould.
Step four, vacuum combined expansion processing: the expansion mould is connected with the vacuum processing controller through the electromagnetic valve, the inner cavity of the expansion mould is intermittently sucked and deflated through the control of the electromagnetic valve, when the expansion mould is connected with the vacuum processing controller, the expansion mould is deflated, and the connection of the expansion mould and the cooling circulation equipment ensures that the inner cavity of the expansion mould is always in a cooling state
Step five, filtering and discharging treatment: during the processing of above step of pyrocondensation pipe process, the heat in the pyrocondensation pipe expansion equipment and the smell that produces in the pyrocondensation pipe treatment effect can pass through the inductor of pyrocondensation pipe expansion equipment both sides to the form of signal of telecommunication starts filter core filter operation work, later avoids appearing the smell and gathers together, the difficult volatile condition during expansion work.
Step six, rolling and preparing the heat shrinkable tube: the pipe collecting machine is started and starts to collect pipes, when the pipe collecting length is reached, the stroke measuring and controlling device for detecting the length transmits an electric signal to the main control device, and the signal is sent to the electromagnetic valve and the pipe collecting machine according to the command, so that the expansion and winding processing work of the contracted pipes is completed.
2. A method for expanding a high-crosslinking-degree PET (polyethylene terephthalate) heat shrinkable tube comprises a heat shrinkable tube expanding device, and is characterized in that: the heat shrinkable tube expansion equipment comprises a far infrared heater, heat shrinkable tube traction sealing equipment, pressure-stabilizing heating equipment, a tube expansion mould and cooling circulation equipment, wherein the heat shrinkable tube is introduced into the heat shrinkable tube expansion equipment by the heat shrinkable tube traction sealing equipment and is connected with the heat shrinkable tube traction sealing equipment for automatic transmission processing after passing through the far infrared heater, the tube expansion mould and the cooling circulation equipment, the semi-finished product of the heat shrinkable tube is heated to 140 ℃ and 180 ℃ by a far-infrared heater and a pressure-stabilizing heating device, the heat shrinkable tube is conveyed to a heat shrinkable tube expanding device at the speed of 2-9 m/min by combining with a heat shrinkable tube traction sealing device, and the vacuum degree of the vacuum combined expansion processing is-0.06 to-0.08 Mpa, and the semi-finished product of the heat shrinkable tube is quickly expanded and cooled to form a finished product of the heat shrinkable tube in heat shrinkable tube expansion equipment by using cooling water with the temperature of 20 to 35 ℃.
3. The expanding method of a highly crosslinked PET heat shrinkable tube according to claim 1, wherein: and heating the semi-finished product of the heat shrinkable tube to 140 ℃ by a far infrared heater and a pressure-stabilizing heating device, and conveying the heat shrinkable tube to a heat shrinkable tube expansion device at the speed of 2 m/min by combining with a heat shrinkable tube traction sealing device.
4. The expanding method of a highly crosslinked PET heat shrinkable tube according to claim 1, wherein: and the vacuum degree of the vacuum combined expansion processing is-0.06 Mpa, and the semi-finished heat shrinkable tube is quickly expanded and cooled in heat shrinkable tube expansion equipment by using cooling water with the temperature of 20 ℃ to form a heat shrinkable tube finished product.
5. The expanding method of a highly crosslinked PET heat shrinkable tube according to claim 1, wherein: and heating the semi-finished product of the heat shrinkable tube to 180 ℃ through a far infrared heater and a pressure stabilizing heating device, and conveying the heat shrinkable tube to a heat shrinkable tube expanding device at the speed of 9 m/min by combining heat shrinkable tube traction sealing equipment.
6. The expanding method of a highly crosslinked PET heat shrinkable tube according to claim 1, wherein: and the vacuum degree of the vacuum combined expansion processing is-0.08 Mpa, and the semi-finished heat shrinkable tube is quickly expanded and cooled in heat shrinkable tube expansion equipment by using cooling water with the temperature of 35 ℃ to form a heat shrinkable tube finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210757546.6A CN115091733A (en) | 2022-06-29 | 2022-06-29 | Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210757546.6A CN115091733A (en) | 2022-06-29 | 2022-06-29 | Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115091733A true CN115091733A (en) | 2022-09-23 |
Family
ID=83294516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210757546.6A Pending CN115091733A (en) | 2022-06-29 | 2022-06-29 | Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115091733A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612790A (en) * | 2008-06-23 | 2009-12-30 | 深圳市沃尔核材股份有限公司 | A kind of expansion method of thermal shrinkage pipe material with large caliber and expansion device thereof |
| CN102079132A (en) * | 2009-11-27 | 2011-06-01 | 深圳市宏商材料科技股份有限公司 | Positive pressure continuous expanding method and device of heat shrinkable pipe |
| CN103101187A (en) * | 2012-12-27 | 2013-05-15 | 上海长园电子材料有限公司 | Expansion method of high-crosslinking-degree heat shrinkable tube |
| CN111503975A (en) * | 2020-04-20 | 2020-08-07 | 合肥华凌股份有限公司 | Refrigerator odor purification control method, refrigerator odor purification device and refrigerator |
| CN212525379U (en) * | 2020-06-11 | 2021-02-12 | 上海骅骝电子科技有限公司 | Gas purification mechanism for expander |
-
2022
- 2022-06-29 CN CN202210757546.6A patent/CN115091733A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612790A (en) * | 2008-06-23 | 2009-12-30 | 深圳市沃尔核材股份有限公司 | A kind of expansion method of thermal shrinkage pipe material with large caliber and expansion device thereof |
| CN102079132A (en) * | 2009-11-27 | 2011-06-01 | 深圳市宏商材料科技股份有限公司 | Positive pressure continuous expanding method and device of heat shrinkable pipe |
| CN103101187A (en) * | 2012-12-27 | 2013-05-15 | 上海长园电子材料有限公司 | Expansion method of high-crosslinking-degree heat shrinkable tube |
| CN111503975A (en) * | 2020-04-20 | 2020-08-07 | 合肥华凌股份有限公司 | Refrigerator odor purification control method, refrigerator odor purification device and refrigerator |
| CN212525379U (en) * | 2020-06-11 | 2021-02-12 | 上海骅骝电子科技有限公司 | Gas purification mechanism for expander |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111002571B (en) | PVC pipe temperature control flaring equipment and method thereof | |
| CN106393542B (en) | A kind of production technology of heavy duty detergent eps foam product | |
| US20110285051A1 (en) | Device And Method For Extruding Plastic Profiles In An Energy Efficient Manner | |
| CN115091733A (en) | Expansion method of high-crosslinking-degree PET (polyethylene terephthalate) heat-shrinkable tube | |
| CN106197087A (en) | A kind of water and flue gas heat-exchange unit and heat-exchange system | |
| DE69702386D1 (en) | METHOD FOR SHAPING A SLEEVE ON A BIAXIAL-ORIENTED POLYVINYL CHLORIDE TUBE | |
| CN106273393B (en) | The full-automatic flange system of composite glass steel pipe | |
| CN214448456U (en) | Thermal shrinkage pipe expanding equipment | |
| US20030219558A1 (en) | Method and apparatus for restoring the necked-down end of a tubular core | |
| CN208178285U (en) | Numerical control cable steel pipe flaring machine | |
| CN204255045U (en) | A kind of glass fibre wets product dried system | |
| CN207373734U (en) | PVC-O tubing one step processing devices | |
| CN202507516U (en) | Online cooling system of internal surface of polyolefin pipes | |
| CN208896477U (en) | Bending machine is used in a kind of processing of tubing elbow | |
| CN204558160U (en) | Electric wire plastic extruding machine and crosslinked vaporium heat energy recycling device | |
| CN212147524U (en) | Dry expanding machine | |
| CN204555614U (en) | A kind of Electric heat oven auxiliary equipment | |
| CN2251467Y (en) | Device for automatic withdrawing rolling bearing internal race for rolling stock | |
| CN205818437U (en) | A kind of biaxial orientation fibrosis reinforced plastic pipe oriontation shaping device | |
| CN217258320U (en) | Efficient and energy-saving bottle blowing machine for plastic bottle processing | |
| CN203854193U (en) | Device used for waste plastic plasticizing, extruding and pelletizing process | |
| CN206923073U (en) | A kind of Novel brake circle high-frequency heating apparatus | |
| CN2691832Y (en) | Vertical heat shrinking pipe vacuum/ inner air combined pipe expander | |
| CN204354478U (en) | A kind of High Efficiency Thermal draw dilator | |
| CN118322538A (en) | FEP heat-shrinkable tube expansion process and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220923 |