CN107932890B - Combined heat shrinkage pipe expansion die - Google Patents
Combined heat shrinkage pipe expansion die Download PDFInfo
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- CN107932890B CN107932890B CN201711418549.2A CN201711418549A CN107932890B CN 107932890 B CN107932890 B CN 107932890B CN 201711418549 A CN201711418549 A CN 201711418549A CN 107932890 B CN107932890 B CN 107932890B
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- expansion
- die
- sealing cover
- mold
- barrel
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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
- B29C61/02—Thermal shrinking
- B29C61/025—Thermal shrinking for the production of hollow or tubular articles
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a combined heat-shrinkable tube expansion die which comprises a first sealing cover, a die barrel, a middle connecting piece, a second sealing cover and an expansion die core, wherein the first sealing cover, the die barrel, the middle connecting piece, the second sealing cover and the expansion die core are enclosed to form a hollow integrated structure; the mould barrels are symmetrically arranged along the length direction of the expansion mould core; the expansion mold core, the first sealing cover, the first mold barrel and the middle connecting piece enclose an expansion section, and the expansion mold core, the second sealing cover, the second mold barrel and the middle connecting piece enclose a cooling section. The combined expansion die provided by the invention has the advantages of simple structure, convenience in installation, disassembly and replacement, convenience in maintenance and the like. Compared with the prior art, a set of die is an integral die, and only one specification of product can be expanded, the specification can be changed only by changing the expansion die core, and the changing process is simple and convenient, so that the die cost is greatly saved.
Description
Technical Field
The invention relates to an expansion die, in particular to a combined heat-shrinkable tube expansion die.
Background
The heat shrinkage pipe is manufactured and formed by heating a semi-finished product, expanding a die and cooling. The existing traditional mould adopts an inner-outer two-section structure and is locked by screw threads. The structure of the die is simple, but the die is not easy to open after being locked, and one set of die is an integral body and can only expand products with one specification; and the die is not beneficial to maintenance, the maintenance cost is higher, and the rejection rate is higher.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the combined heat-shrinkable tube expansion die which is simple in structure, convenient to install, disassemble and replace and convenient to maintain.
In order to achieve the purpose, the invention provides a combined heat-shrinkable tube expansion die, which adopts the following technical scheme:
the expansion die comprises a first sealing cover, a die barrel, a middle connecting piece, a second sealing cover and an expansion die core, wherein the first sealing cover, the die barrel, the middle connecting piece and the second sealing cover enclose a hollow integrated structure;
the expansion mold core is of a hollow structure for the pipe to travel, and the mold barrels are hollow first mold barrels and second mold barrels which are connected into a whole through intermediate connectors along the length direction of the expansion mold core; the expansion mold core penetrates through the middle connecting piece and is respectively connected with the first hollow sealing cover and the second hollow sealing cover into a whole at two ends, and the first sealing cover and the second sealing cover are respectively connected with two ends of the mold barrel into a whole;
the expansion mold core, the first sealing cover, the first mold barrel and the middle connecting piece enclose an expansion section, and the expansion mold core, the second sealing cover, the second mold barrel and the middle connecting piece enclose a cooling section.
The technical scheme aims at the problems of low usability and high maintenance cost of the die in the prior art, redesigns the structure of the die, and designs the die into a combined die which can be split into a single structural unit. The defect that a set of die is an integral die in the prior art and is unfavorable for maintenance and disassembly is overcome.
Preferably, the die barrel is of a hollow cylindrical metal structure, and internal threads are arranged at two ends of the die barrel along the length direction of the expansion die core; the first die barrel and the second die barrel are in threaded connection with the hollow cylindrical middle connecting piece;
the expansion mold core just passes through the central cylindrical hole of the middle connecting piece and is in threaded connection with the central cylindrical holes of the first sealing cover and the second sealing cover;
external threads are arranged on the lower outer edge part of the first sealing cover and the upper outer edge part of the second sealing cover, and the external threads are correspondingly connected with the internal threads at the two ends of the two mold barrels respectively.
Further, seal grooves for placing seal rings are formed in the hole walls of the first seal cover, the second seal cover and the central hole of the middle connecting piece.
The technical scheme adopts the sealing ring for sealing, and compared with the screw locking sealing mode in the prior art, the screw locking sealing mode has the advantage of being convenient to install and detach.
Further, the apertures of the central cylindrical holes of the first sealing cover, the second sealing cover and the middle connecting piece are the same.
Further, the expansion mold core is divided into a three-section step structure along the length direction, the outer diameters of the first section step and the third section step are consistent in size, and the outer diameter of the second section step is larger than that of the first section step and the third section step;
the outer diameter of the first section of step is the same as the aperture of the central hole of the first sealing cover;
the second section of step, the first sealing cover, the mold barrel and the middle connecting piece enclose an expansion section;
the third section of step, the middle connecting piece, the mold barrel and the second sealing cover enclose a cooling section.
The space volume of the expansion section is smaller than that of the cooling section, the vacuum suction is fully considered to be suitable for a small space, the cooling is suitable for the requirement of a large space, and the expansion and cooling effects are better than those of the center in the prior art.
Preferably, at least one pair of axisymmetric vacuum threaded holes for vacuumizing are arranged on the first mold barrel; at least one pair of axisymmetric cooling threaded holes for installing a water nozzle are formed in the second mold barrel; to fulfill the aim of vacuumizing or cooling water passing;
the expansion sections are uniformly arranged to a plurality of rows of vacuum holes at intervals along the length direction of the expansion mold core; preferably 4 to 6 rows;
and a plurality of cooling water holes are formed in the cooling section.
The technical scheme is used for guaranteeing the vacuumizing and cooling shaping effects.
Preferably, the first cover is provided with a groove for installing the die mouth of the expansion die.
Preferably, the side surface of the first sealing cover is provided with a symmetrical circular groove which is convenient to detach.
Preferably, the first sealing cover, the mould barrel, the middle connecting piece and the second sealing cover all adopt standardized structural members with certain specifications and sizes.
The technical scheme standardizes the specification and the size of all structures except the expansion mold core, so that the mold can be replaced by replacing only one mold core, and the manufacturing cost of the mold can be greatly saved.
The invention has the beneficial effects that:
the combined expansion die provided by the invention has the advantages of simple structure, convenience in installation, disassembly and replacement, convenience in maintenance and the like. Compared with the prior art, a set of die is an integral die, and only one specification of product can be expanded, the specification can be changed only by changing the expansion die core, and the changing process is simple and convenient, so that the die cost is greatly saved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The meaning of the reference symbols in the figures is as follows:
1-a first cover; 2-a mold barrel; 21-a first mould barrel; 210-vacuum threaded holes; 22-a second mould barrel; 220-cooling the threaded hole; 3-an intermediate connection; 4-a second cover; 5-expanding the mold core; 6-expanding section; 7-a cooling section; 8-sealing rings.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment is a combined heat-shrinkable tube expansion mold, which includes a first cover 1, a mold barrel 2, an intermediate connecting piece 3, a second cover 4, and an expansion mold core 5 that enclose a hollow integral structure;
the expansion mould core is of a hollow structure for the pipe to travel, the mould barrel 2 is provided with a first hollow mould barrel 21 and a second hollow mould barrel 22 along the length direction of the expansion mould core 5, and the two mould barrels are connected into a whole through the middle connecting piece 3; the expansion mold core 5 penetrates through the middle connecting piece 3 and is respectively connected with the first hollow sealing cover 1 and the second hollow sealing cover 4 into a whole at two ends, and the first sealing cover 1 and the second sealing cover 4 are respectively connected with two ends of the mold barrel 2 into a whole;
the expansion mold core 5, the first sealing cover 1, the first mold barrel 21 and the middle connecting piece 3 enclose an expansion section 6, and the expansion mold core 5, the second sealing cover 1, the second mold barrel 21 and the middle connecting piece 3 enclose a cooling section 7.
The embodiment aims at the problems of low usability and high maintenance cost of the die in the prior art, redesigns the structure of the die, and designs the die into a combined die which can be split into a single structural unit. The defect that a set of die is an integral die in the prior art and is unfavorable for maintenance and disassembly is overcome.
Example 2
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 1, the die barrel 2 is of a hollow cylindrical metal structure, and two ends of the die barrel 2 along the length direction of the expansion die core 5 are provided with internal threads; the first die barrel 21 and the second die barrel 22 are in threaded connection with the hollow cylindrical middle connecting piece 3 (the two die barrels can be symmetrically arranged along the length direction of the expansion die core 5);
the expansion mould core 5 just passes through (i.e. without clearance through) the central cylindrical hole of the intermediate connecting piece 3 and is in threaded connection with the central cylindrical holes of the first sealing cover 1 and the second sealing cover 4;
external threads are arranged on the lower outer edge part of the first sealing cover 1 and the upper outer edge part of the second sealing cover 4, and are correspondingly and respectively in threaded connection with the internal threads at the two ends of the two mold barrels 2.
Example 3
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 2, seal grooves for placing the seal ring 8 are formed on the hole walls of the central holes of the first seal cover 1, the second seal cover 4 and the intermediate connecting piece 3. The sealing ring plays a role in sealing the mounting gaps of the first sealing cover 1, the second sealing cover 4, the middle connecting piece 3 and the expansion mold core 5. The structural shape of the leakage portion after the first and second covers are fixed can be changed according to actual conditions.
The embodiment adopts the sealing ring to seal, and compared with the screw locking sealing mode in the prior art, the screw locking sealing mode has the advantage of being convenient to install and detach.
Example 4
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 2, the diameters of the central cylindrical holes of the first cover 1, the second cover 4 and the intermediate connecting piece 3 are the same, and a uniform space environment is provided for the expansion die core 5 in each place within the range of the diameters.
Example 5
As shown in fig. 1, in the expansion mold of this embodiment, on the basis of embodiment 4, the expansion mold core 5 is divided into three steps along its length direction, the outer diameters of the first step and the third step are identical, and the outer diameter of the second step is larger than the outer diameters of the first step and the third step; the outer diameter of the first section of step is the same as the aperture of the central hole of the first sealing cover 1; the second section of step, the first sealing cover 1, the mould barrel 2 and the middle connecting piece 3 enclose an expansion section 6; the third step, the middle connecting piece 3, the mold barrel 2 and the second sealing cover 4 enclose a cooling section 7.
The space of the expansion section 6 is smaller than that of the cooling section 7, the vacuum suction is fully considered to be suitable for a small space, the cooling is suitable for the requirement of a large space, and the expansion and cooling effects are better than those of the center in the prior art.
Example 6
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 1, at least a pair of axisymmetric vacuum threaded holes 210 are provided on the first die barrel 21; at least one pair of axisymmetric cooling screw holes 220 for installing the water nozzle are arranged on the second mold barrel 22; to fulfill the aim of vacuumizing or cooling water passing.
The expansion section 6 is uniformly provided with a plurality of (preferably 4 to 6 rows of) vacuum holes (not shown) at intervals along the length direction of the expansion mold core 5; the cooling section 7 is provided with a plurality of cooling water holes (not shown in the figure). Is used for guaranteeing the effects of vacuumizing, cooling and shaping.
It should be noted that, in this embodiment, the number, the spatial position, the shape, and the like of the threaded holes are designed according to the actual requirements, and the number, the position, the shape, and the like of the vacuum holes/the cooling water holes including the water inlet holes and the water outlet holes are improved and perfected continuously according to the use requirements. For example, the water inlet direction of the cooling water hole is designed to be obtuse with the advancing direction of the pipe in the expansion die core 5.
Example 7
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 1, a groove for installing a die mouth of the expansion die is formed in the first cover 1.
Example 8
As shown in fig. 1, in the expansion die of this embodiment, on the basis of embodiment 1, a symmetrical circular groove which is convenient to detach is provided on the side surface of the first cover 1.
Example 9
As shown in fig. 1, the expansion die of this embodiment is based on embodiments 1 to 8, and is characterized in that: the first sealing cover 1, the mould barrel 2, the middle connecting piece 3 and the second sealing cover 4 all adopt standardized structural members with certain specifications and sizes.
In the embodiment, the specification and the size of all structures except the expansion mold core are standardized, so that the mold can be replaced by replacing only one mold core, and the manufacturing cost of the mold can be greatly saved.
Example 10
Referring to fig. 1, the installation process of the expansion die of this embodiment is as follows: the middle of the first mould barrel 21 and the second mould barrel 22 which are consistent in size are connected in a threaded manner through an intermediate connecting piece 3; then the second mould barrel 22 and the second sealing cover 5 are connected by screw threads; then the expansion mould core 5 is inserted into the central cylindrical hole of the second sealing cover 4 along the length direction through the central cylindrical hole of the middle connecting piece 3, then the central cylindrical hole of the first sealing cover 1 is aligned with the central cylindrical hole of the expansion mould core 5, and the expansion mould core is connected through threads, so that a combined expansion mould is formed.
The die in the embodiment is convenient to detach, and only the expansion die core 5 needs to be replaced when the specification is replaced.
Example 11
Referring to fig. 1, the specific application process of the expansion die of this embodiment is as follows: when expanding, the pipe enters the expanding mold core 5 from the upper part of the combined mold (the upper part corresponds to the display direction in the figure 1 and does not form limitation on the direction in the specific application, and the initial end corresponds to the advancing direction of the pipe essentially), the first mold barrel 21 and the upper half section of the expanding mold core 5 (the upper half section corresponds to the display direction in the figure 1 and does not form limitation on the direction in the specific application) are connected with an external vacuum system to form negative pressure, and the negative pressure is transmitted to the pipe through a threaded hole for vacuumizing and a vacuum hole on the mold core to finish the expansion of the pipe, namely the expanding section 6; the expanded pipe continues to descend along the expansion mold core 5 (the 'down' corresponds to the display direction in fig. 1, and does not form a limitation on the direction in specific application, and the 'down' actually corresponds to the travelling direction of the pipe) to the cooling section 7 formed by the expansion mold core 5 and the second section mold barrel 2, and the cooling section is connected with external cooling water and is transmitted to the pipe through a threaded hole for passing cooling water and a cooling water hole on the mold core to finish cooling shaping after expansion.
The expansion mold core in the embodiment of the invention is a hollow structure for the pipe to travel, and the size of the center hole determines the size of the expansion mold.
In summary, the combined expansion die provided by the invention has the outstanding advantages of changeable specification, convenience in combination, convenience in maintenance, cost saving and the like. When the specification is changed, only the expansion mold core needs to be changed, and compared with the prior art that the whole mold needs to be changed when the specification is changed, the mold is simpler and more convenient, and the mold cost is saved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (9)
1. A combined heat-shrinkable tube expansion die is characterized in that:
the expansion die comprises a first sealing cover, a die barrel, a middle connecting piece, a second sealing cover and an expansion die core which enclose a hollow integrated structure;
the expansion mold core is of a hollow structure for the pipe to travel, and the mold barrels are hollow first mold barrels and second mold barrels which are connected into a whole through intermediate connectors along the length direction of the expansion mold core; the expansion mold core penetrates through the middle connecting piece and is respectively connected with the first hollow sealing cover and the second hollow sealing cover into a whole at two ends, and the first sealing cover and the second sealing cover are respectively connected with two ends of the mold barrel into a whole;
the expansion mold core, the first sealing cover, the first mold barrel and the middle connecting piece enclose a vacuum expansion section, and the expansion mold core, the second sealing cover, the second mold barrel and the middle connecting piece enclose a cooling section;
the die barrel is of a hollow cylindrical metal structure, and internal threads are arranged at two ends of the die barrel along the length direction of the expansion die core; the first die barrel and the second die barrel are in threaded connection with the hollow cylindrical middle connecting piece;
the expansion mold core just passes through the central cylindrical hole of the middle connecting piece and is in threaded connection with the central cylindrical holes of the first sealing cover and the second sealing cover;
external threads are arranged on the lower outer edge part of the first sealing cover and the upper outer edge part of the second sealing cover, and the external threads are correspondingly connected with the internal threads at the two ends of the two mold barrels respectively, so that the expansion mold cores can be replaced.
2. A modular heat shrink tube expansion die as set forth in claim 1 wherein: and sealing grooves for placing sealing rings are formed in the walls of the first sealing cover, the second sealing cover and the central hole of the middle connecting piece.
3. A modular heat shrink tube expansion die as set forth in claim 1 wherein:
the apertures of the central cylindrical holes of the first sealing cover, the second sealing cover and the middle connecting piece are the same.
4. A modular heat shrink tube expansion die as set forth in claim 3 wherein:
the expansion mould core is divided into a three-section step structure along the length direction, the outer diameter of the first section of step is consistent with that of the third section of step, and the outer diameter of the second section of step is larger than that of the first section of step and the third section of step;
the outer diameter of the first section of step is the same as the aperture of the central hole of the first sealing cover;
the second section of step, the first sealing cover, the mold barrel and the middle connecting piece enclose an expansion section;
the third section of step, the middle connecting piece, the mold barrel and the second sealing cover enclose a cooling section.
5. A modular heat shrink tube expansion die as set forth in claim 1 wherein:
at least one pair of axisymmetric vacuum threaded holes are formed in the first mold barrel; at least one pair of axisymmetric cooling threaded holes for installing a water nozzle are formed in the second mold barrel;
the expansion section is uniformly provided with a plurality of rows of vacuum holes at intervals along the length direction of the expansion mold core;
and a plurality of cooling water holes are formed in the cooling section.
6. A modular heat shrink tube expansion die as set forth in claim 1 wherein:
the expansion section is uniformly provided with 4 to 6 rows of vacuum holes at intervals along the length direction of the expansion mold core.
7. A modular heat shrink tube expansion die as set forth in claim 1 wherein:
and a groove for installing the die nozzle of the expansion die is formed in the first sealing cover.
8. A modular heat shrink tube expansion die as set forth in claim 1 wherein:
the side face of the first sealing cover is provided with a symmetrical circular groove convenient to detach.
9. A modular heat shrink tube expansion die according to any of claims 1-8, wherein: the first sealing cover, the mould barrel, the middle connecting piece and the second sealing cover are standardized structural members with certain specification and size; the first die barrel and the second die barrel are symmetrically arranged along the length direction of the expansion die core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418549.2A CN107932890B (en) | 2017-12-25 | 2017-12-25 | Combined heat shrinkage pipe expansion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711418549.2A CN107932890B (en) | 2017-12-25 | 2017-12-25 | Combined heat shrinkage pipe expansion die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107932890A CN107932890A (en) | 2018-04-20 |
| CN107932890B true CN107932890B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711418549.2A Active CN107932890B (en) | 2017-12-25 | 2017-12-25 | Combined heat shrinkage pipe expansion die |
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| CN (1) | CN107932890B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278278B (en) * | 2018-09-28 | 2020-09-04 | 杭州亿通塑胶实业有限公司 | Polyethylene solid wall pipe and expansion forming device thereof |
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|---|---|---|---|---|
| JP2008307823A (en) * | 2007-06-15 | 2008-12-25 | Sumitomo Electric Fine Polymer Inc | Heat shrinkable tube manufacturing method and manufacturing apparatus |
| CN201261261Y (en) * | 2008-07-15 | 2009-06-24 | 深圳长园电子材料有限公司 | Expander for thermal shrinkage pipe |
| CN101480680A (en) * | 2009-01-07 | 2009-07-15 | 东莞三联热缩材料有限公司 | Uniform dilatation mold of 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 |
| CN205255504U (en) * | 2015-11-30 | 2016-05-25 | 苏州市飞博冷热缩制品有限公司 | Expanding mould of heat shrinking pipe |
| CN105643915A (en) * | 2016-03-29 | 2016-06-08 | 长园集团股份有限公司 | Heat shrink tube expanding mould |
| CN207772408U (en) * | 2017-12-25 | 2018-08-28 | 上海长园电子材料有限公司 | A kind of combined hot draw dilatation mold |
-
2017
- 2017-12-25 CN CN201711418549.2A patent/CN107932890B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008307823A (en) * | 2007-06-15 | 2008-12-25 | Sumitomo Electric Fine Polymer Inc | Heat shrinkable tube manufacturing method and manufacturing apparatus |
| CN201261261Y (en) * | 2008-07-15 | 2009-06-24 | 深圳长园电子材料有限公司 | Expander for thermal shrinkage pipe |
| CN101480680A (en) * | 2009-01-07 | 2009-07-15 | 东莞三联热缩材料有限公司 | Uniform dilatation mold of 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 |
| CN205255504U (en) * | 2015-11-30 | 2016-05-25 | 苏州市飞博冷热缩制品有限公司 | Expanding mould of heat shrinking pipe |
| CN105643915A (en) * | 2016-03-29 | 2016-06-08 | 长园集团股份有限公司 | Heat shrink tube expanding mould |
| CN207772408U (en) * | 2017-12-25 | 2018-08-28 | 上海长园电子材料有限公司 | A kind of combined hot draw dilatation mold |
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