CN115157645A - Expansion die for heat-shrinkable tube with double cooling chambers - Google Patents
Expansion die for heat-shrinkable tube with double cooling chambers Download PDFInfo
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- CN115157645A CN115157645A CN202210709691.7A CN202210709691A CN115157645A CN 115157645 A CN115157645 A CN 115157645A CN 202210709691 A CN202210709691 A CN 202210709691A CN 115157645 A CN115157645 A CN 115157645A
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- cooling
- die
- chamber
- ring
- shrinkable tube
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- 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
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/06—Making preforms having internal stresses, e.g. plastic memory
- B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a double-cooling-chamber heat-shrinkable tube expanding die which comprises a die outer sleeve and a die inner core, wherein a cavity is arranged in the die outer sleeve, a heat-shrinkable tube injection opening is formed in one end of the die outer sleeve, a heat-shrinkable tube flow channel is arranged in the die inner core, the die inner core is arranged in the cavity of the die outer sleeve and is communicated with the heat-shrinkable tube injection opening, the cavity of the die outer sleeve is divided into three sections which are respectively sealed by the die inner core, a vacuum chamber, a pre-cooling chamber and a quick cooling chamber are sequentially arranged along the flow direction of a heat-shrinkable tube, vacuum is pumped in the vacuum chamber, and the temperature of a cooling medium in the pre-cooling chamber is higher than that of a cooling medium in the quick cooling chamber. The expansion die for the double-cooling-chamber heat shrink tube improves the cooling efficiency, reduces the internal friction force between the tube wall and the wall surface of the die core, and can prevent the circumferential shrinkage rate of a product from fluctuating.
Description
Technical Field
The invention relates to the technical field of mold manufacturing, in particular to a double-cooling-chamber heat shrink tube expansion mold.
Background
With the upgrading of industrial structures, the demand of heat shrinkable tubes in the electronic industry continues to increase. The heat shrinkable tube is a product which is simple to operate, safe and efficient, has a shape memory function, and is commonly used for sealing and wrapping automobile wire harnesses. The expansion technology is one of key technologies in the manufacturing process of the heat shrinkable tube, and the quality and the expansion efficiency of the tube depend on the structure of a mould, the flow rate of cooling water and the temperature of the cooling water.
The common cooling and shaping methods in the expansion process of the existing heat-shrinkable tube comprise an internal pressure method, a dry-wet combined cooling phase method, a vacuum method and a water cooling method. According to different cooling and shaping modes, the die structure can be further divided into a vacuum chamber and a cooling chamber which are independent from each other, a vacuum chamber and a cooling chamber which are combined with each other, and a vacuum chamber and a cooling water tank. During the expansion process, the heat dissipation of the vacuum chamber is mainly dissipated in the form of heat radiation, and the heat dissipation is particularly small. For this reason, the heat of the pipe is more removed in a cooling water cooling manner. The design of the cooling system of the expansion die needs attention to the structural design of the cooling chamber and the optimization of the technological parameters of cooling water. The expansion mould of current single cooling chamber structure along with the improvement of expanding speed, pipeline quality and expansion efficiency reduce, and the axial fluctuation is great, and tubular product surface heat dissipation is less.
Therefore, the invention provides a double-cooling-chamber heat-shrinkable tube expansion die, which solves the problems that the temperature of the inner surface and the outer surface of the existing single-cooling-chamber structure expansion die cannot be uniformly reduced and the surface of a pipe cannot be sufficiently cooled due to the expansion of the pipe.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a double-cooling-chamber heat shrink tube expansion mould.
The invention provides a double-cooling-chamber heat-shrinkable tube expansion die which comprises a die outer sleeve and a die inner core, wherein a cavity is arranged in the die outer sleeve, a heat-shrinkable tube injection opening is formed in one end of the die outer sleeve, a heat-shrinkable tube flow channel is arranged in the die inner core, the die inner core is arranged in the cavity of the die outer sleeve, the heat-shrinkable tube flow channel is communicated with the heat-shrinkable tube injection opening, the cavity of the die outer sleeve is divided into three sections which are respectively sealed by the die inner core, a vacuum chamber, a pre-cooling chamber and a quick cooling chamber are sequentially arranged along the flow direction of the heat-shrinkable tube, vacuum is pumped in the vacuum chamber, and the temperature of a cooling medium in the pre-cooling chamber is higher than that of a cooling medium in the quick cooling chamber.
Furthermore, the end, far away from the heat shrink tube injection opening, of the mold outer sleeve is of an open structure, a first ring, a second ring, a third ring and a fourth ring are arranged on the mold inner core, the first ring is matched with the end, far away from the heat shrink tube injection opening, of the mold outer sleeve, the fourth ring is matched with the open end of the mold outer sleeve, and the second ring and the third ring are matched with the inner wall of the mold outer sleeve.
Preferably, a sealing ring is respectively arranged between the first ring, the second ring, the third ring and the die outer sleeve.
Preferably, the fourth ring is threadedly connected to the die housing.
Further, the part of the heat shrinkable tube flow passage located in the vacuum chamber is provided with a tapered section.
Furthermore, the die inner core is provided with a vacuum small hole in the cross section direction of the part of the vacuum chamber, the die inner core is provided with a pre-cooling section water inlet small hole in the cross section direction of the part of the pre-cooling chamber, and the die inner core is provided with a rapid cooling section water inlet small hole in the cross section direction of the part of the rapid cooling chamber.
Preferably, a heating cavity is further arranged on the outer side of the injection port of the heat shrinkable tube, a heating medium injection port is arranged on the outer sleeve of the mold, and the heating medium injection port is communicated with the heating cavity.
Preferably, a self-lubricating guide sleeve is arranged between the heat shrinkable tube injection port and the heating cavity.
Further, a plug is arranged at the end of the mold outer sleeve and plugs the heating cavity.
Furthermore, a vacuum pumping hole is formed in the part, located in the vacuum chamber, of the mold jacket, a pre-cooling chamber cooling water inlet and a pre-cooling chamber cooling water outlet are formed in the part, located in the pre-cooling chamber, of the mold jacket, and a quick-cooling chamber cooling water inlet and a quick-cooling chamber cooling water outlet are formed in the part, located in the quick-cooling chamber, of the mold jacket.
Compared with the prior art, the invention has the following beneficial effects:
according to the expansion die for the double-cooling-chamber heat shrinkable tube, after the heat shrinkable tube is expanded at the vacuum section, the heat shrinkable tube is firstly put into the pre-cooling chamber, slowly cooled and sized by using the temperature higher than the room temperature, and cooled to the shrinkage temperature of the heat shrinkable tube through secondary cooling in the quick cooling chamber. Under the condition of the same cooling process parameters, the outlet temperature of the pipe of the double cooling chambers is lower than that of the single cooling chamber, the temperature difference between the two cooling chambers is 30K, and the cooling effect of the double cooling chambers is better than that of the single cooling chamber. Through set up a plurality of inlet openings on the mould inner core inner wall, overcome the not good enough defect of traditional pyrocondensation pipe cooling effect, inside cooling water was inhaled the mold core by the vacuum, cooling water direct contact pipe wall formed the one deck water film at pipe wall and mould sizing pipe inner wall, not only effectively reduced the pipe wall temperature, more can play sealed and lubricated effect, reduced the internal friction power of pipe wall and mold core wall, prevented that product axial shrinkage factor is undulant.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an assembly view of a dual cooling chamber heat shrink tube expansion die according to an embodiment of the present invention;
FIG. 2 is a schematic view of a mold core of a heat-shrinkable tube expansion mold with two cooling chambers according to an embodiment of the present invention;
FIG. 3 is a schematic view of a mold jacket of a heat shrinkable tube expansion mold with two cooling chambers according to an embodiment of the present invention;
FIG. 4 is a schematic view of a plug of a dual cooling chamber heat shrinkable tube expanding mold according to an embodiment of the present invention;
fig. 5 is a schematic view of a self-lubricating guide sleeve of a heat-shrinkable tube expansion die with two cooling chambers according to an embodiment of the present invention.
In the figure:
1-plug, 2-die outer sleeve, 21-heat shrinkable tube injection port, 3-heating medium injection port, 4-small sealing ring, 5-die inner core, 51-heat shrinkable tube flow channel, 52-first ring, 53-second ring, 54-third ring, 55-fourth ring, 6-vacuum small hole, 7-medium sealing ring, 8-precooling chamber cooling water inlet, 9-precooling section water inlet small hole, 10-quick cooling chamber cooling water inlet, 11-quick cooling section water inlet small hole, 12-quick cooling chamber, 13-quick cooling chamber cooling water outlet, 14-large sealing ring, 15-precooling chamber, 16-precooling chamber cooling water outlet, 17-vacuum chamber, 18-vacuum pumping port, 19-heating chamber, 20-self-lubricating guide sleeve.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the invention.
The invention provides a double-cooling-chamber heat shrink tube expansion die which is used for fully cooling the surface of a tube by a temperature gradient type cooling mode, accelerating the expansion rate, improving the product quality and reducing the axial fluctuation of the tube.
As shown in fig. 1, 2 and 3, the double cooling chamber heat shrinkable tube expanding die of the present embodiment includes a die case 2 and a die core 5. The mold jacket 2 may have a cylindrical structure or other shapes, and in this embodiment, the mold jacket 2 has a cylindrical shape. The inner part of the outer die sleeve 2 is a cavity, and one end of the outer die sleeve is of an open structure, namely the cavity penetrates through the end part; the other end is a non-open structure, namely an end plate is arranged; the non-open end of the die outer sleeve 2 is provided with a heat shrink tube filling opening 21. The inside of the die core 5 is provided with a heat shrinkable tube flow passage 51 along the length direction, and the heat shrinkable tube flows in the heat shrinkable tube flow passage 51 to be gradually formed into a heat shrinkable tube. The mold core 5 is placed in the cavity of the mold jacket 2 so that the heat shrinkable tube flow path 51 communicates with the heat shrinkable tube injection port 21 and the center lines are collinear. The inner die core 5 is matched with the outer die sleeve 2, and the inner cavity of the outer die sleeve 2 is sequentially divided into a vacuum chamber 17, a pre-cooling chamber 15 and a quick cooling chamber 12 along the flowing direction of the heat shrinkable tube.
Vacuum is pumped in the vacuum chamber 17, the pre-cooling chamber 15 and the quick cooling chamber 12 respectively contain cooling media, and the temperature of the cooling media in the pre-cooling chamber 15 is higher than that of the cooling media in the quick cooling chamber 12.
As shown in fig. 2, the mold core 5 is provided with a first ring 52, a second ring 53, a third ring 54 and a fourth ring 55, the first ring 52 is fitted to the heat shrinkable tube injection port 21, the fourth ring 55 is fitted to the open end of the mold jacket 2, and the second ring 53 and the third ring 54 divide the inner cavity of the mold jacket 2 into the vacuum chamber 17, the pre-cooling chamber 15 and the rapid cooling chamber 12.
In this embodiment, the fourth ring 55 is provided with an external thread, and the mold jacket 2 is provided with an internal thread, so that the mold core 5 is in threaded connection with the mold jacket 2. After the threads are fully engaged, the first ring 52 is pressed against the end of the heat shrinkable tube injection port 21. In the present embodiment, the diameters of the first ring 52, the second ring 53, the third ring 54, and the fourth ring 55 are gradually increased; the inner wall of the die case 2 is provided with projections which form pressing surfaces with the second ring 53, the third ring 54, and the fourth ring 55, respectively.
In order to increase the sealing effect, a small-size sealing ring 4 is arranged between the first ring 52 and the pressing surface of the die jacket 2, a medium-size sealing ring 7 is arranged between the second ring 53 and the pressing surface of the die jacket 2, and a large-size sealing ring 14 is arranged between the third ring 54 and the pressing surface of the die jacket 2. In this embodiment, the inner diameter and the outer diameter of the small-sized seal ring 4 are 8mm and 10mm, the inner diameter and the outer diameter of the medium-sized seal ring 7 are 32mm and 34mm, and the inner diameter and the outer diameter of the large-sized seal ring 14 are 38mm and 40mm, respectively.
As shown in fig. 1, a portion of the heat shrinkable tube flow path 51 near the first ring 52 is provided with a tapered section so that the heat shrinkable tube flow path 51 is tapered and the diameter of the heat shrinkable tube injection port 21 is made smaller than that of the body portion of the heat shrinkable tube flow path 51. The length of the conical section is 2-3 times of the outer diameter of the heat shrinkable tube, and the taper is 25 degrees. The diameter of the heat shrinkable tube flow path 51 at the large end of the tapered section is the same as or slightly larger than that of the heat shrinkable tube.
The part of the die inner core 5, which is positioned in the vacuum chamber 17, is provided with a vacuum small hole 6 along the radial direction, the part of the die inner core, which is positioned in the pre-cooling chamber 15, is provided with a pre-cooling section water inlet small hole 9 along the radial direction, and the part of the die inner core, which is positioned in the rapid cooling chamber 12, is provided with a rapid cooling section water inlet small hole 11 along the radial direction. The diameters of the vacuum small holes 6, the pre-cooling section water inlet small holes 9 and the rapid cooling section water inlet small holes 11 are 1-3 mm, and the adjacent distance is 5mm.
The mold jacket 2 is provided with a vacuum pumping port 18 at the part of the vacuum chamber 17, a pre-cooling chamber cooling water inlet 8 and a pre-cooling chamber cooling water outlet 16 at the part of the pre-cooling chamber 15, and a quick cooling chamber cooling water inlet 10 and a quick cooling chamber cooling water outlet 13 at the part of the quick cooling chamber 12. The diameters of the vacuum pumping hole 18, the pre-cooling chamber cooling water inlet 8, the pre-cooling chamber cooling water outlet 16, the quick cooling chamber cooling water inlet 10 and the quick cooling chamber cooling water outlet 13 are 5mm.
The inside of the vacuum chamber 17 is evacuated through the vacuum pumping port 18, so that the heat shrinkable tube can be expanded after entering the portion of the heat shrinkable tube flow passage 51 located in the vacuum chamber 17. Cooling water enters the pre-cooling chamber 15 and the quick cooling chamber 12 from the pre-cooling chamber cooling water inlet 8 and the quick cooling chamber cooling water inlet 10 respectively, enters the interior of the mold inner core 5 under the action of vacuum suction through the pre-cooling section water inlet small hole 9 and the quick cooling section water inlet small hole 11 on the mold inner core 5, and is in contact with the expanded heat shrinkable tube wall to cool the surface of the mold inner core. In the invention, the heat shrinkable tube firstly enters the part of the flow passage 51 of the heat shrinkable tube, which is positioned in the precooling chamber 15, and the temperature higher than room temperature is used for slowly cooling and sizing the pipeline; and then enters the part of the heat shrinkable tube flow passage 51 positioned in the quick cooling chamber 12, and is cooled to the temperature below the shrinkage temperature of the heat shrinkable tube by secondary cooling. The mode that the cooling water flows through the inner part of the die inner core 5 solves the problem of low cooling efficiency of the heat shrinkable tube on one hand, and can play a role in lubricating when the heat shrinkable tube is expanded and pulled on the other hand, so that the internal friction coefficient between the outer wall of the tube and the sizing tube is reduced, and the axial shrinkage rate of the product is favorably reduced. The cooling water not sucked in by vacuum flows out from the pre-cooling chamber cooling water outlet 16 and the quick cooling chamber cooling water outlet 13 respectively.
A heating cavity 19 is arranged on the end plate of the mold jacket 2 and positioned at the radial outer side of the heat shrinkable tube injection port 21, a heating medium injection port 3 is also arranged on the mold jacket 2, the heating medium injection port 3 is communicated with the heating cavity 19, a heating medium is injected into the heating cavity 19 through the heating medium injection port 3, the temperature of the pre-expansion tube is kept constant before the pre-expansion tube enters the vacuum chamber 17, and the outer diameter of the pre-expansion tube cannot change along with the change of expansion vacuum. In this embodiment, the temperature of the heating medium is 110 to 130 ℃.
A separable self-lubricating guide sleeve 20 is further arranged between the heat shrinkable tube injection port 21 and the heating cavity 19, and the self-lubricating guide sleeve 20 can avoid the problem of circumferential stretching caused by friction between the heated tube and the outer wall of the mold sizing tube; the self-lubricating guide sleeve is structured as shown in fig. 5.
The end part of the mold outer sleeve 2 is also provided with a plug 1, and the plug 1 plugs the end part of the heating cavity 19 to prevent the heating medium from leaking in the heating cavity 19; the structure of the plug is shown in fig. 4.
In this embodiment, the material of mould overcoat 2, mould inner core 5, end cap 1 is brass, and the material of self-lubricating uide bushing 20 is polytetrafluoroethylene.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a two cooling chamber pyrocondensation pipe expansion mould, its characterized in that, includes mould overcoat, mould inner core, the inside of mould overcoat is equipped with the cavity, the one end of mould overcoat is equipped with the pyrocondensation pipe filling opening, the inside of mould inner core is equipped with pyrocondensation pipe flow path, the mould inner core is located in the cavity of mould overcoat, pyrocondensation pipe flow path with pyrocondensation pipe filling opening intercommunication, the mould inner core will the cavity of mould overcoat is separated into respective confined three-section, follows the flow direction of pyrocondensation pipe is real empty room, precooling chamber, fast cooling chamber in proper order, the evacuation in the vacuum chamber, the temperature of the cooling medium in the precooling chamber is higher than the temperature of cooling medium in the fast cooling chamber.
2. The double cooling chamber heat shrinkable tube expanding die of claim 1, wherein an end of the die case, which is away from the heat shrinkable tube injection port, has an open structure, the die inner core is provided with a first ring, a second ring, a third ring, and a fourth ring, the first ring is engaged with the end of the heat shrinkable tube injection port of the die case, the fourth ring is engaged with the open end of the die case, and the second ring and the third ring are engaged with the inner wall of the die case.
3. The twin cooling chamber heat shrink tube expansion die of claim 2, wherein a sealing ring is disposed between each of the first ring, the second ring, the third ring and the die jacket.
4. The dual cooling chamber heat shrink tube expansion die of claim 2, wherein said fourth ring is threadably connected to said die jacket.
5. The dual cooling chamber heat shrink tube expansion die of claim 1, wherein the portion of the heat shrink tube flow channel located in the vacuum chamber is provided with a tapered section.
6. The double-cooling-chamber heat-shrinkable tube expanding die of claim 1, wherein the die core is provided with vacuum small holes in the cross-sectional direction at the portion of the vacuum chamber, is provided with pre-cooling-section water inlet small holes in the cross-sectional direction at the portion of the pre-cooling chamber, and is provided with quick-cooling-section water inlet small holes in the cross-sectional direction at the portion of the quick-cooling chamber.
7. The double cooling chamber heat shrinkable tube expanding die of claim 1, wherein a heating chamber is further provided outside the heat shrinkable tube injection port, and a heating medium injection port is provided on the die case, the heating medium injection port being in communication with the heating chamber.
8. The dual cooling chamber heat shrink tube expansion die of claim 7, wherein a self-lubricating guide sleeve is provided between the heat shrink tube injection port and the heating chamber.
9. The double cooling chamber heat shrinkable tube expanding die of claim 8, wherein a plug is provided at an end of the die housing, and the plug plugs the heating chamber.
10. The double-cooling-chamber heat shrinkable tube expanding die of claim 1, wherein a vacuum suction port is provided at a portion of the die jacket located in the vacuum chamber, a pre-cooling-chamber cooling water inlet and a pre-cooling-chamber cooling water outlet are provided at a portion of the die jacket located in the pre-cooling chamber, and a rapid-cooling-chamber cooling water inlet and a rapid-cooling-chamber cooling water outlet are provided at a portion of the die jacket located in the rapid-cooling chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210709691.7A CN115157645A (en) | 2022-06-22 | 2022-06-22 | Expansion die for heat-shrinkable tube with double cooling chambers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210709691.7A CN115157645A (en) | 2022-06-22 | 2022-06-22 | Expansion die for heat-shrinkable tube with double cooling chambers |
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| Publication Number | Publication Date |
|---|---|
| CN115157645A true CN115157645A (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210709691.7A Pending CN115157645A (en) | 2022-06-22 | 2022-06-22 | Expansion die for heat-shrinkable tube with double cooling chambers |
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| CN (1) | CN115157645A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549546A (en) * | 2024-01-09 | 2024-02-13 | 无等电子(盐城)有限公司 | Improved generation PVC heat shrinkage bush evenly expands mould |
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| CN101327645A (en) * | 2008-07-15 | 2008-12-24 | 深圳长园电子材料有限公司 | Device for expanding thermal shrinkage tube |
| CN205009584U (en) * | 2015-10-09 | 2016-02-03 | 东莞三联热缩材料有限公司 | Quick expansion mould of heat shrinkage bush |
| CN207916018U (en) * | 2018-03-09 | 2018-09-28 | 陕西甘霖实业有限公司 | Tubular product vacuum shaping |
| CN208682113U (en) * | 2018-08-06 | 2019-04-02 | 深圳市华联兴电器有限公司 | Heat-shrink tube improves the machine of pyrocondensation consistency in a kind of production of harness |
| CN209208009U (en) * | 2018-11-29 | 2019-08-06 | 潍坊盛大管业有限公司 | A kind of pipe extruder diameter-setting equipment with hot water ring and pre-cooler |
| CN211390086U (en) * | 2019-12-04 | 2020-09-01 | 宁波益创韦塑料科技有限公司 | Sizing cooling structure of polyether-ether-ketone pipe |
| CN213291340U (en) * | 2020-05-08 | 2021-05-28 | 苏州市鑫联冷热缩科技有限公司 | Water absorption mold for expansion of heat shrinkage pipe |
-
2022
- 2022-06-22 CN CN202210709691.7A patent/CN115157645A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101327645A (en) * | 2008-07-15 | 2008-12-24 | 深圳长园电子材料有限公司 | Device for expanding thermal shrinkage tube |
| CN205009584U (en) * | 2015-10-09 | 2016-02-03 | 东莞三联热缩材料有限公司 | Quick expansion mould of heat shrinkage bush |
| CN207916018U (en) * | 2018-03-09 | 2018-09-28 | 陕西甘霖实业有限公司 | Tubular product vacuum shaping |
| CN208682113U (en) * | 2018-08-06 | 2019-04-02 | 深圳市华联兴电器有限公司 | Heat-shrink tube improves the machine of pyrocondensation consistency in a kind of production of harness |
| CN209208009U (en) * | 2018-11-29 | 2019-08-06 | 潍坊盛大管业有限公司 | A kind of pipe extruder diameter-setting equipment with hot water ring and pre-cooler |
| CN211390086U (en) * | 2019-12-04 | 2020-09-01 | 宁波益创韦塑料科技有限公司 | Sizing cooling structure of polyether-ether-ketone pipe |
| CN213291340U (en) * | 2020-05-08 | 2021-05-28 | 苏州市鑫联冷热缩科技有限公司 | Water absorption mold for expansion of heat shrinkage pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549546A (en) * | 2024-01-09 | 2024-02-13 | 无等电子(盐城)有限公司 | Improved generation PVC heat shrinkage bush evenly expands mould |
| CN117549546B (en) * | 2024-01-09 | 2024-04-02 | 无等电子(盐城)有限公司 | Improved generation PVC heat shrinkage bush evenly expands mould |
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