CN115230203A - Polyether-ether-ketone bar production annealing process - Google Patents
Polyether-ether-ketone bar production annealing process Download PDFInfo
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- CN115230203A CN115230203A CN202210454519.1A CN202210454519A CN115230203A CN 115230203 A CN115230203 A CN 115230203A CN 202210454519 A CN202210454519 A CN 202210454519A CN 115230203 A CN115230203 A CN 115230203A
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- annealing
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- annealing pipe
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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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses an annealing process for producing a polyether-ether-ketone bar, which comprises the following steps of putting an extruded bar into an annealing pipe, filling nitrogen into the annealing pipe by a gas needle inflation device, then covering a cover with a sealing ring, putting the annealing pipe into an annealing furnace, setting the temperature of 250-320 ℃ for annealing, finishing annealing after annealing for 300-500 minutes, cooling to room temperature, and taking out the bar. The invention has the beneficial effects that: the annealing pipe is firstly improved into a sealing structure, the bottom of the annealing pipe is additionally provided with an inflation air valve with a valve core structure, nitrogen is filled into the annealing pipe, the annealing pipe is prevented from being oxidized, annealing can be carried out at a temperature of faster crystallization, stress is effectively eliminated, and the bar with high straightness and excellent appearance is obtained.
Description
Technical Field
The invention relates to the technical field of production of polyether-ether-ketone bars, in particular to a production annealing process of polyether-ether-ketone bars.
Background
The PEEK bar material is widely applied to aerospace, automobile manufacturing, semiconductors, food, petrochemical industry and the like due to excellent mechanical property, heat resistance, fatigue resistance, abrasion resistance, hydrolysis resistance and chemical reagent resistance, can be used for machining precision gears, machining wear-resistant gears, machining precision wear-resistant bearings and supporting parts of some electrical equipment as a section bar, and has wide application, after the PEEK bar material is formed, because the crystallization speed of the PEEK is slow, the extruded bar material is brittle and has poor dimensional stability, long-time high-temperature annealing treatment needs to be carried out, the general process is 180-260 ℃, the crystallization of the material is complete, the mechanical property is optimized, and the dimension is stable.
According to the conventional annealing process, hot air which flows circularly is adopted for annealing in an annealing furnace, and as most of polyether-ether-ketone is used in the electronic industry, the chemical industry and the food industry, an antioxidant and an anti-aging agent are not generally added, the surface of a bar material can be continuously aged by thermal oxidation in the hot air annealing process, so that the bar material is yellowed in color, even brown, and poor in product quality, and in addition, the problems of bar material warping and poor linearity can be caused due to incomplete stress release in the annealing process at 180-260 ℃.
Disclosure of Invention
The invention aims to provide an annealing process for producing a polyether-ether-ketone bar so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the production annealing process of the polyether-ether-ketone bar is characterized by comprising the following steps of:
the method comprises the following steps: putting the extruded bar into an annealing pipe;
step two: the gas needle inflating device inflates nitrogen into the annealing pipe, and then covers the cover with the sealing ring;
step three: putting the annealing pipe into an annealing furnace, and annealing at the temperature of 250-320 ℃;
step four: and after annealing for 300-500 minutes, finishing annealing, cooling to room temperature, and taking out the bar.
Preferably, in the first step, the annealing pipe is made of an aluminum-silicon alloy, and the content of iron and copper in the annealing pipe is less than 0.01%.
Preferably, in the first step, the thickness of the annealing pipe is 0.5-2mm, and the size of the annealing pipe is consistent with the tolerance on the bar.
Preferably, in the first step, the bottom of the annealing pipe is provided with an inflatable air valve with an air core structure.
Preferably, in the first step, a high-elasticity heat-resistant sealing ring cover is arranged at the opening of the annealing pipe, and the sealing ring is made of a perfluoro ether rubber material.
Preferably, in the second step, the gas needle inflating device inflates nitrogen gas into the annealing tube for 1-2 minutes.
Preferably, in the third step, the annealing temperature may be increased or decreased according to the thickness of the bar.
Advantageous effects
According to the polyether-ether-ketone bar production annealing process provided by the invention, firstly, an annealing pipe is improved into a sealing structure, an inflation air valve with a valve core structure is additionally arranged at the bottom of the pipe, nitrogen is filled into the annealing pipe to avoid oxidation of the annealing pipe, the annealing pipe can be annealed at a higher crystallization temperature, stress is effectively eliminated, and a bar with high straightness and excellent appearance is obtained.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Examples
An annealing process for producing a polyether-ether-ketone bar comprises the following steps:
the method comprises the following steps: putting the extruded bar into an annealing pipe;
step two: the gas needle inflating device inflates nitrogen into the annealing pipe, and then a cover with a sealing ring is covered;
step three: putting the annealing pipe into an annealing furnace, and annealing at the temperature of 250-320 ℃;
step four: and after annealing for 300-500 minutes, finishing annealing, cooling to room temperature, and taking out the bar.
In the embodiment, the annealing pipe is made of aluminum-silicon alloy, the content of iron and copper in the annealing pipe is lower than 0.01%, the thickness of the annealing pipe is 0.5-2mm, the size of the annealing pipe is consistent with the tolerance on the bar, the tightness of the annealing pipe is ensured, an inflatable air valve with a valve core structure is arranged at the bottom of the annealing pipe, nitrogen is filled to avoid oxidation during annealing, a high-elasticity heat-resistant sealing ring cover is arranged at the opening of the annealing pipe, the sealing ring is made of perfluoro-ether rubber, a gas needle inflating device fills nitrogen into the annealing pipe for 1-2 minutes, and the annealing temperature can be increased or reduced according to the thickness of the bar.
The annealing pipe is of a sealing structure, an inflation air valve with a valve core structure is additionally arranged at the bottom of the annealing pipe, nitrogen is filled into the annealing pipe, the annealing pipe is prevented from being oxidized, annealing can be carried out at a higher crystallization temperature, stress is effectively eliminated, and the bar with high straightness and excellent appearance is obtained.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.
Claims (7)
1. An annealing process for producing a polyether-ether-ketone bar is characterized by comprising the following steps:
the method comprises the following steps: putting the extruded bar into an annealing pipe;
step two: the gas needle inflating device inflates nitrogen into the annealing pipe, and then a cover with a sealing ring is covered;
step three: putting the annealing pipe into an annealing furnace, and annealing at the temperature of 250-320 ℃;
step four: and after annealing for 300-500 minutes, finishing annealing, cooling to room temperature, and taking out the bar.
2. The process for producing and annealing a bar of polyetheretherketone according to claim 1, characterized in that: in the first step, the annealing pipe is made of aluminum-silicon alloy, and the content of iron and copper is lower than 0.01%.
3. The process for producing and annealing a bar of polyetheretherketone according to claim 1, characterized in that: in the first step, the thickness of the annealing pipe is 0.5-2mm, and the size of the annealing pipe is consistent with the tolerance on the bar.
4. The process for producing and annealing a polyetheretherketone rod according to claim 1, wherein the process comprises the following steps: in the first step, an inflatable air valve with a valve core structure is arranged at the bottom of the annealing pipe.
5. The process for producing and annealing a bar of polyetheretherketone according to claim 1, characterized in that: in the first step, a high-elasticity heat-resistant sealing ring cover is arranged at the opening of the annealing pipe, and the sealing ring is made of a perfluoro-ether rubber material.
6. The process for producing and annealing a bar of polyetheretherketone according to claim 1, characterized in that: and in the second step, the gas needle inflating device inflates nitrogen into the annealing pipe for 1-2 minutes.
7. The process for producing and annealing a bar of polyetheretherketone according to claim 1, characterized in that: in the third step, the annealing temperature can be increased or decreased according to the thickness of the bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210454519.1A CN115230203A (en) | 2022-04-27 | 2022-04-27 | Polyether-ether-ketone bar production annealing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210454519.1A CN115230203A (en) | 2022-04-27 | 2022-04-27 | Polyether-ether-ketone bar production annealing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115230203A true CN115230203A (en) | 2022-10-25 |
Family
ID=83668122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210454519.1A Pending CN115230203A (en) | 2022-04-27 | 2022-04-27 | Polyether-ether-ketone bar production annealing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115230203A (en) |
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2022
- 2022-04-27 CN CN202210454519.1A patent/CN115230203A/en active Pending
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