CN101011854A - Manufacturing method for hot pressing extrusion of polytetrafluoroethylene steel bar and special hot pressing extrusion machine therefor - Google Patents
Manufacturing method for hot pressing extrusion of polytetrafluoroethylene steel bar and special hot pressing extrusion machine therefor Download PDFInfo
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- CN101011854A CN101011854A CNA2007100671307A CN200710067130A CN101011854A CN 101011854 A CN101011854 A CN 101011854A CN A2007100671307 A CNA2007100671307 A CN A2007100671307A CN 200710067130 A CN200710067130 A CN 200710067130A CN 101011854 A CN101011854 A CN 101011854A
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- hot pressing
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- extruded
- extrusion machine
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the bar of politef making process, which feeds politef powder to get the bar material through heat pressure extrusion machine. The vertical material output can increase extrusion rate, smooth flow of the material feeding, avoiding clog of hopper, improved in bar material quality. It is simple in structure, being able to install upstairs and downstairs, with convenient feeding and easy stripping.
Description
Technical field
The present invention relates to the preparation technology of polytetrafluoroethylsteel steel bar, relate in particular to preparation method and special hot pressing extrusion machine thereof that polytetrafluoroethylsteel steel bar hot pressing is extruded.
Background technology
Polytetrafluoroethylplastic plastic is a kind of engineering plastics of excellent performance, and it is good that it has self-lubricating property, and coefficient of friction is low, high-low temperature resistant, corrosion-resistant and good insulation performance performance and non-viscosity are widely used in machinery, electronics, oil, chemical industry, industries such as food, light industry.
Existing polytetrafluoroethylplastic plastic bar generally adopts hot pressing to extrude preparation.Existing bar hot pressing extrusion machine mainly is horizontal.As shown in Figure 1, extruder is made up of following several parts: hydraulic system 1, oil cylinder 2, hopper 6, fuselage 8, push rod 3 etc.This horizontal machine structure, the shortcoming of existence mainly contains following several respects: (1), yield poorly, and once can only release a bar, speed can not satisfy the customer order demand too slowly; (2), blanking is not smooth, is easy to occur stopping up the hopper phenomenon, makes the bar fracture of release; (3), the too high workman of the hopper labour intensity of feeding is big, blanking is inconvenient to be difficult for blanking; (4), machine take up room greatly many, and complex structure easily assembling not.
Summary of the invention
Prepare the technical problem that the polytetrafluoroethylplastic plastic bar exists in order to solve above-mentioned horizontal bar hot pressing extrusion machine, an object of the present invention is to provide a kind of efficient height, blanking smoothness, the stay-in-grade vertical polytetrafluoroethylsteel steel bar preparation method who extrudes of bar.
Another object of the present invention provides above-mentioned vertical hot pressing extrusion machine.
In order to realize first purpose of the present invention, the present invention has adopted following technical scheme:
The preparation method that polytetrafluoroethylsteel steel bar hot pressing is extruded, this technology are extruded powder by hot pressing extrusion machine then and are prepared polytetrafluoroethylsteel steel bar by the charging of polytetrafluoroethylene (PTFE) powder, and described polytetrafluoroethylsteel steel bar is vertically discharging in hot pressing extrusion machine.
As preferably, the pressure of hot pressing extrusion machine extrusion bar is 1M～20Mpa, per hour 0.8～1.2 meter of extruded velocity, and the dwell time was at 30～60 seconds.
As preferably, described hot pressing extrusion machine comprises forming cavity, cooling chamber and 3 joint heating chambers, cooling chamber band water cooling; The temperature of 3 joint heating chambers is set to: first segment is 250～280 ℃; The 3rd joint is 350～380 ℃; The 4th joint is 200～250 ℃.
The most most preferably, described first segment temperature is set to 270 ℃; The second joint temperature is set to 370 ℃; The 3rd joint temperature is 230 ℃; The pressure of extrusion bar is 10Mpa, per hour 1 meter of extruded velocity, and the dwell time was at 45 seconds.
In order to realize second purpose of the present invention, the present invention has adopted following technical scheme:
Special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing, comprise frame, fuselage, push rod, hopper, extruding pipe, described fuselage vertically is provided with, and hopper is arranged on body upper, extruding pipe is arranged in the fuselage, and push rod is arranged on above the hopper and over against extruding pipe.
As preferably, be provided with 2 extruding pipes in the described fuselage at least, and the push rod of respective number is set.
As preferably, described extruding pipe from top to bottom is made up of forming cavity, cooling chamber, 3 joint heating chambers, cooling chamber peripheral hardware cooling water pond, and 3 joint heating chambers are provided with the heat conduction cover outward, forming cavity connection hopper, push rod is over against forming cavity.
As preferred again, the temperature setting of described 3 joint heating chambers is respectively 250～280 ℃, and 350～380 ℃, 200～250 ℃.
As preferably, push rod is arranged on the mount pad by hydraulic oil cylinder driving, and is provided with guide rail, and mount pad moves reciprocatingly on guide rail.
The present invention is by above-mentioned technical scheme, and polytetrafluoroethylsteel steel bar is vertically discharging in hot pressing extrusion machine, improves rate of extrusion, and the polytetrafluoroethylene (PTFE) powder is the blanking smoothness in extruder, has avoided obstruction hopper phenomenon, has improved the bar quality.Certainly the present invention also can be provided with a plurality of extruding pipes in hot pressing extrusion machine, realizes that many bars extrude simultaneously, further raises the efficiency.If but adopted horizontal discharging, the powder blanking is not smooth could to realize that then many bars extrude simultaneously.
In addition, because bar is vertical discharging, it is 1M～20Mpa that the present invention adopts the pressure of hot pressing extrusion machine extrusion bar, per hour 0.8～1.2 meter of extruded velocity, and the dwell time was improved the speed of discharging at 30～60 seconds, had stablized the quality of product simultaneously again.Hot pressing extrusion machine adopts 1 joint cooling, 3 joint insulations, and cooling is passed to feeder for fear of the heat of bottom and made the powder caking; 3 joint insulation first segments, second saves cascade raising temperature, helps the quality of bar; The 3rd joint reduces temperature, prevents to extrude and rises greatly.
Special hot pressing extrusion machine is extruded in the polytetrafluoroethylsteel steel bar hot pressing that the present invention adopts, and is simple in structure, can install by upper and lower floor, solved the too high workman of the hopper big technical problem of labour intensity of feeding, and blanking is convenient, is easy to blanking.
Description of drawings
Fig. 1 is the structural representation of the horizontal hot pressing extruder of prior art.
Fig. 2 is the structural representation of the vertical hot pressing extrusion machine of the present invention.
Fig. 3 is the structural representation of fuselage of the present invention and hopper.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is made a detailed explanation, but do not limited by embodiment.
Special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing as shown in Figure 2, is made up of hydraulic system 1, oil cylinder 2, push rod 3, frame 7, hopper 6 and fuselage 8, and oil cylinder 2, push rod 3, hopper 6 and fuselage 8 are fixedly installed on respectively on the frame 7.Fuselage 8 vertically is provided with, and push rod 3 is arranged on hopper 6 tops, and hopper 6 is arranged on fuselage 8 tops, is provided with 4 extruding pipes 9 in the fuselage 8.
As shown in Figure 2, push rod 3 is arranged on hopper 6 tops and over against extruding pipe 9.Push rod 3 is arranged on the mount pad 4 and is driven by oil cylinder 2, and oil cylinder 2 is driven by hydraulic system 1.Frame 7 is provided with guide rail 5, and mount pad 4 moves reciprocatingly on guide rail 5.
As Fig. 2, shown in Figure 3, every extruding pipe 9 from top to bottom is made up of forming cavity 12, cooling chamber 13,3 joint heating chambers 14,15,16, cooling chamber 13 peripheral hardwares cooling water pond 10,3 joint heating chambers 14,15, the 16 outer heat conduction covers 11 that are provided with, forming cavity 12 connects hopper 6, and push rod 3 is over against forming cavity 12.
When above-mentioned hot pressing extrusion machine is worked, polytetrafluoroethylene (PTFE) is vertically discharging in hot pressing extrusion machine, and the temperature setting of 3 joint heating chambers 14,15,16 is respectively 270 ℃, 370 ℃, 230 ℃, and the pressure of extrusion bar is 10Mpa, per hour 1 meter of extruded velocity, the dwell time was at 45 seconds.
Claims (9)
1. the preparation method that extrudes of polytetrafluoroethylsteel steel bar hot pressing, this technology is by the charging of polytetrafluoroethylene (PTFE) powder, by hot pressing extrusion machine powder is extruded then and prepared polytetrafluoroethylsteel steel bar, it is characterized in that the vertically discharging in hot pressing extrusion machine of described polytetrafluoroethylsteel steel bar.
2. the preparation method that polytetrafluoroethylsteel steel bar hot pressing according to claim 1 is extruded, the pressure that it is characterized in that the hot pressing extrusion machine extrusion bar is 1M～20Mpa, per hour 0.8～1.2 meter of extruded velocity, the dwell time was at 30～60 seconds.
3. the preparation method that polytetrafluoroethylsteel steel bar hot pressing according to claim 1 and 2 is extruded is characterized in that described hot pressing extrusion machine comprises forming cavity (12), cooling chamber (13) and 3 joint heating chambers (14,15,16), cooling chamber (13) band water cooling; The temperature of 3 joint heating chambers (14,15,16) is set to: first segment (14) is 250～280 ℃; The 3rd joint (15) is 350～380 ℃; The 4th joint (16) is 200～250 ℃.
4. the preparation method that polytetrafluoroethylsteel steel bar hot pressing according to claim 3 is extruded is characterized in that first segment (14) temperature is set to 270 ℃; Second joint (15) temperature is set to 370 ℃; The 3rd joint (16) temperature is 230 ℃; The pressure of extrusion bar is 100pa, per hour 1 meter of extruded velocity, and the dwell time was at 45 seconds.
5. special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing, comprise frame (7), fuselage (8), push rod (3), hopper (6), extruding pipe (9), it is characterized in that described fuselage (8) vertically is provided with, hopper (6) is arranged on fuselage (8) top, extruding pipe (9) is arranged in the fuselage (8), and push rod (3) is arranged on above the hopper (6) and over against extruding pipe (9).
6. special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing according to claim 4, it is characterized in that being provided with 2 extruding pipes (9) at least in fuselage (8), and the push rod (3) of respective number is set.
7. special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing according to claim 4, it is characterized in that extruding pipe (9) saves heating chambers by forming cavity (12), cooling chamber, 3 from top to bottom and forms, cooling chamber peripheral hardware cooling water pond (10), 3 joint heating chambers are provided with heat conduction cover (11) outward, forming cavity (12) connects hopper (6), and push rod (3) is over against forming cavity (12).
8. special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing according to claim 6, it is characterized in that the temperature setting of 3 joint heating chambers is respectively 250～280 ℃, and 350～380 ℃, 200～250 ℃.
9. special hot pressing extrusion machine is extruded in polytetrafluoroethylsteel steel bar hot pressing according to claim 4, it is characterized in that push rod (3) is arranged on mount pad (4) and goes up by oil cylinder (2) driving, and is provided with guide rail (5), and mount pad (4) moves reciprocatingly on guide rail (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100671307A CN101011854A (en) | 2007-01-31 | 2007-01-31 | Manufacturing method for hot pressing extrusion of polytetrafluoroethylene steel bar and special hot pressing extrusion machine therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100671307A CN101011854A (en) | 2007-01-31 | 2007-01-31 | Manufacturing method for hot pressing extrusion of polytetrafluoroethylene steel bar and special hot pressing extrusion machine therefor |
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| CN101011854A true CN101011854A (en) | 2007-08-08 |
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| CNA2007100671307A Pending CN101011854A (en) | 2007-01-31 | 2007-01-31 | Manufacturing method for hot pressing extrusion of polytetrafluoroethylene steel bar and special hot pressing extrusion machine therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310541A (en) * | 2011-09-21 | 2012-01-11 | 武汉工程大学 | Polymer material bar single screw extrusion cylinder molding method and molding device thereof |
| CN105643899A (en) * | 2014-10-31 | 2016-06-08 | 陈路 | Banded extruder used for manufacturing polytetrafluoroethylene (PTFE) sewing threads |
| CN105887215A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Process for manufacturing PTFE sewing thread through extrusion method |
| CN104441548B (en) * | 2014-11-27 | 2016-08-24 | 湖州松华橡塑有限公司 | Plastic rod hot pressing extrusion device and hot pressing extrusion method thereof |
| CN107263837A (en) * | 2017-07-06 | 2017-10-20 | 广州畅业橡胶石油设备有限公司 | A kind of preparation method and applications of teflon rod |
-
2007
- 2007-01-31 CN CNA2007100671307A patent/CN101011854A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310541A (en) * | 2011-09-21 | 2012-01-11 | 武汉工程大学 | Polymer material bar single screw extrusion cylinder molding method and molding device thereof |
| CN102310541B (en) * | 2011-09-21 | 2013-08-07 | 武汉工程大学 | Polymer material bar single screw extrusion cylinder molding method and molding device thereof |
| CN105643899A (en) * | 2014-10-31 | 2016-06-08 | 陈路 | Banded extruder used for manufacturing polytetrafluoroethylene (PTFE) sewing threads |
| CN105887215A (en) * | 2014-10-31 | 2016-08-24 | 陈路 | Process for manufacturing PTFE sewing thread through extrusion method |
| CN104441548B (en) * | 2014-11-27 | 2016-08-24 | 湖州松华橡塑有限公司 | Plastic rod hot pressing extrusion device and hot pressing extrusion method thereof |
| CN107263837A (en) * | 2017-07-06 | 2017-10-20 | 广州畅业橡胶石油设备有限公司 | A kind of preparation method and applications of teflon rod |
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Open date: 20070808 |