CN219968781U - Die sleeve for producing miniature polytetrafluoroethylene tube - Google Patents
Die sleeve for producing miniature polytetrafluoroethylene tube Download PDFInfo
- Publication number
- CN219968781U CN219968781U CN202320186023.0U CN202320186023U CN219968781U CN 219968781 U CN219968781 U CN 219968781U CN 202320186023 U CN202320186023 U CN 202320186023U CN 219968781 U CN219968781 U CN 219968781U
- Authority
- CN
- China
- Prior art keywords
- compression
- cavity
- die sleeve
- die
- utility
- 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.)
- Active
Links
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 19
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 19
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 60
- 238000007906 compression Methods 0.000 claims abstract description 60
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a die sleeve for producing a miniature polytetrafluoroethylene tube, wherein a die cavity is formed in the die sleeve, the die cavity comprises a first compression cavity and a second compression cavity which are divided into two parts along the extrusion direction, the first compression cavity and the second compression cavity both comprise a horn-shaped extrusion cavity, the larger end of the horn-shaped extrusion cavity is an inlet end, and the smaller end of the horn-shaped extrusion cavity is communicated with a straight runner. The utility model adopts the double compression die sleeve, and the first compression ratio is obtained through calculation, so that the hard nodule blocks with the wall thickness of 95% can be removed in the first compression, the residual hard nodule blocks can be better removed in the second compression, and the quality of the microtube is ensured. The utility model has reasonable structure, the die sleeve is only required to be arranged at the original die sleeve position during use, the installation is simple and convenient, the die sleeve can be directly cleaned and maintained after the use is finished, and the daily maintenance is convenient. The die sleeve is simple to manufacture, the processing requirement can be met by common numerical control equipment, and the die sleeve is low in overall cost and suitable for general popularization and use.
Description
Technical Field
The utility model relates to a die sleeve for producing a miniature polytetrafluoroethylene tube, and belongs to the technical field of plastic molding process equipment.
Background
Original directly extruded die sleeve used for producing polytetrafluoroethylene microtubes is difficult to ensure the smoothness of the appearance all the time, and the produced microtubesThe surface is rugged and rough.
Polytetrafluoroethylene micro-tubeThe production of the product has high requirements on surface flatness and smoothness, no particularly good solution is available in the industry, and although the problem can be solved occasionally through adjustment of process parameters, the difficulty of mass production is high and the reject ratio is too high.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: provides a die sleeve capable of improving the surface smoothness of a polytetrafluoroethylene micro tube.
In order to solve the problems, the utility model provides a die sleeve for producing a miniature polytetrafluoroethylene tube, a die cavity is arranged in the die sleeve, the die cavity comprises a first compression cavity and a second compression cavity which are divided into two parts along the extrusion direction, the first compression cavity and the second compression cavity both comprise a horn-shaped extrusion cavity, the larger end of the horn-shaped extrusion cavity is an inlet end, and the smaller end of the horn-shaped extrusion cavity is communicated with a straight runner.
Preferably, the first compression chamber and the second compression chamber have the same shape, and the first compression chamber has a larger specification and size than the second compression chamber.
Preferably, the cross section of any part of the first compression cavity and the second compression cavity is circular, and the die sleeve and the die cavity, namely the first compression cavity and the second compression cavity, are coaxially arranged.
The principle of the double compression die sleeve is that polytetrafluoroethylene dispersion is extruded to perform double compression on the product, and the residual nodules and hard lumps in the wall thickness of the product can be removed through double compression, so that no obvious induration is caused in the wall thickness of the extruded product, and the brightness, smooth surface and no uneven phenomenon of the sintered product are ensured.
Working principle: the principle of polytetrafluoroethylene tube production is that polytetrafluoroethylene dispersion is put into a cylinder, then the dispersion is extruded in a straight line feeding mode, the extruded dispersion can pass through a die core, a die sleeve is extruded to form a circular-diameter pipe fitting, the pipe fitting is milky white, then the pipe fitting enters a drying furnace for drying, then enters a sintering furnace for high-temperature sintering, and finally the pipe fitting is naturally cooled to form a final product.
Polytetrafluoroethylene micro-tubeThe production of the (C) has extremely high requirements on the stability of equipment, particularly on a die sleeve and a die core, because the quality of the die core of the die sleeve determines the dimensional accuracy of a product, the appearance of the product, the smoothness of the product and the like. The design of the die sleeve is to perform double compression on the wall thickness of the product extruded by linear pushing, ensure that no obvious nodule exists in the wall thickness after compression, ensure that the wall thickness of the product is uniform in internal materials after sintering, ensure that solvent oil can completely volatilize and not remain, and ensure that a miniature tube is manufactured>The surface smoothness and dimensional stability of the polytetrafluoroethylene micro tube greatly reduce the material loss, improve the product quality, reduce the complaint of customers and greatly improve the polytetrafluoroethylene micro tube->Satisfaction.
The utility model adopts the double compression die sleeve, and the first compression ratio is obtained through calculation, so that the hard nodule blocks with the wall thickness of 95% can be removed in the first compression, the residual hard nodule blocks can be better removed in the second compression, and the quality of the microtube is ensured. Polytetrafluoroethylene micro-tube capable of bottom measurement and solving problem after brand new design of double compression die sleeveThe surface of the processed product is smooth and has no rugged surface.
The utility model has reasonable structure, the die sleeve is only required to be arranged at the original die sleeve position during use, the installation is simple and convenient, the die sleeve can be directly cleaned and maintained after the use is finished, and the daily maintenance is convenient. The die sleeve is simple to manufacture, the processing requirement can be met by common numerical control equipment, and the die sleeve is low in overall cost and suitable for general popularization and use.
Drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is a schematic view of the present utility model in transverse cross section.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Examples
As shown in fig. 1 and 2, the die sleeve for producing a micro polytetrafluoroethylene tube provided by the utility model is provided with a die cavity, the die cavity comprises a first compression cavity 1 and a second compression cavity 2 which are divided into two parts along the extrusion direction, the first compression cavity 1 and the second compression cavity 2 both comprise trumpet-shaped extrusion cavities, the larger end of each trumpet-shaped extrusion cavity is an inlet end, the smaller end of each trumpet-shaped extrusion cavity is communicated with a straight runner, and the trumpet-shaped extrusion cavities of the first compression cavity 1, the straight runner of the first compression cavity 1, the trumpet-shaped extrusion cavities of the second compression cavity 2 and the straight runner of the second compression cavity 2 are sequentially communicated.
The first compression chamber 1 and the second compression chamber 2 have the same shape, and the first compression chamber 1 has a larger size than the second compression chamber 2 (i.e., the first compression chamber 1 has the same shape as the second compression chamber 2 and is enlarged in the same proportion).
The cross section of any position of the first compression cavity 1 and the second compression cavity 2 is circular, and the die sleeve and the first compression cavity 1 and the second compression cavity 2 are coaxially arranged, namely the die cavity is of a central axis symmetrical structure and is positioned in the center of the die sleeve.
Claims (3)
1. A die sleeve for producing miniature polytetrafluoroethylene pipe, offer the die cavity in the die sleeve, its characterized in that, the die cavity includes first compression chamber (1), second compression chamber (2) divide into two parts along extruding direction, and first compression chamber (1), second compression chamber (2) all include loudspeaker form extrusion chamber, and the great end in loudspeaker form extrusion chamber is the entry end, and less end intercommunication is runner always.
2. The die sleeve for producing the miniature polytetrafluoroethylene tube according to claim 1, wherein the first compression cavity (1) and the second compression cavity (2) are identical in shape, and the first compression cavity (1) is larger in specification size than the second compression cavity (2).
3. The die sleeve for producing the miniature polytetrafluoroethylene tube according to claim 1, wherein the cross section of any part of the first compression cavity (1) and the second compression cavity (2) is circular, and the die sleeve and the die cavity, namely the first compression cavity (1) and the second compression cavity (2), are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320186023.0U CN219968781U (en) | 2023-02-09 | 2023-02-09 | Die sleeve for producing miniature polytetrafluoroethylene tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320186023.0U CN219968781U (en) | 2023-02-09 | 2023-02-09 | Die sleeve for producing miniature polytetrafluoroethylene tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219968781U true CN219968781U (en) | 2023-11-07 |
Family
ID=88595248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320186023.0U Active CN219968781U (en) | 2023-02-09 | 2023-02-09 | Die sleeve for producing miniature polytetrafluoroethylene tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219968781U (en) |
-
2023
- 2023-02-09 CN CN202320186023.0U patent/CN219968781U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108637031A (en) | A kind of mold preparing high-performance magnesium-alloy tubing | |
| CN1820866A (en) | Hot extruding mould for gear shaping sheet heat radiator aluminium profile | |
| CN219968781U (en) | Die sleeve for producing miniature polytetrafluoroethylene tube | |
| CN203184350U (en) | Aluminum alloy profile extrusion die | |
| CN202878648U (en) | One-mould double-tube extruding mould | |
| CN102366766A (en) | Hot extrusion mold for producing profile for electrified high-speed railway feedback line clamps | |
| CN215032424U (en) | Gradual expansion die structure for continuous extrusion forming of copper and copper alloy plate strip | |
| CN204685699U (en) | A kind of extrusion die with U-type groove tubular aluminum section bar | |
| CN213002408U (en) | Large-scale flange production is with ring rolling machine assembly jig | |
| CN208800783U (en) | A kind of powder metallurgy die of special-shaped axis bearing sleeve | |
| CN109160715B (en) | Small mouth glass bottle pressing-blowing process mould | |
| CN204523812U (en) | Cold drawing mold | |
| CN200977698Y (en) | Forming mould for hollow brick | |
| CN208962379U (en) | A kind of mold ironware positioning pulled core structure | |
| CN2598106Y (en) | Low-smoke halogen-less and low-halogen thield sleeve extruding mould | |
| CN2527435Y (en) | Extruder minipore mould | |
| CN217054155U (en) | Extrusion die of PE outdoor wood-plastic floor | |
| CN220534495U (en) | Multifunctional line brick die | |
| CN221187480U (en) | Multi-cavity tube forming die | |
| CN215849874U (en) | Mould for preparing compact powder material | |
| CN201913788U (en) | Head runner structure of twin-screw extruder | |
| CN217257654U (en) | Composite material special pipe forming die | |
| CN2614876Y (en) | Superthin ceramic boad forming apparatus | |
| CN219883246U (en) | Extrusion die for large-width plastic composite board | |
| CN208101150U (en) | A kind of block-proof type vacuum suction mold and its backing plate assemblies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |