CN101885240A - Posttreatment method for extrusion-molded polycarbonate thin wall - Google Patents
Posttreatment method for extrusion-molded polycarbonate thin wall Download PDFInfo
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- CN101885240A CN101885240A CN2010101439338A CN201010143933A CN101885240A CN 101885240 A CN101885240 A CN 101885240A CN 2010101439338 A CN2010101439338 A CN 2010101439338A CN 201010143933 A CN201010143933 A CN 201010143933A CN 101885240 A CN101885240 A CN 101885240A
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Abstract
The invention relates to a posttreatment method for an extrusion-molded polycarbonate thin wall, which comprises the following steps of: 1, heating the extrusion-molded polycarbonate thin wall to the temperature of between 100 and 140 DEG C; 2, preserving the heat at the heating temperature of between 100 and 140 DEG C for 1 to 6 hours; and 3, naturally cooling to room temperature. By implementing the posttreatment method for the extrusion-molded polycarbonate thin wall, the defect of large internal stress in the polycarbonate thin wall caused by the extrusion molding method can be eliminated, so the polycarbonate thin wall can be effectively prevented from being cracked due to overlarge internal stress.
Description
Technical field
The present invention relates to aftertreatment technology, more particularly, relate to a kind of post-processing approach of polycarbonate thin wall of extrusion moulding.
Background technology
Usually, for the lighting in illuminator peculiar to vessel, its environment for use very severe and needs are in running order always.The lamp tube that uses in the lighting of prior art, the wall thickness of lamp tube thin-walled and generally are to adopt Merlon (polycarbonate is called for short PC) extrusion moulding to obtain generally in 5mm.But the major defect of this forming method is in the former process engineering of expecting cavity forming of the high temperature of molten state, because excessive temperature differentials, therefore can form very big internal stress in that the lamp tube thin-walled of moulding is inner, lamp tube thin-walled is easy to ftracture and cause the light fixture mistake quick-fried owing to the effect of internal stress like this.
Summary of the invention
The technical problem to be solved in the present invention is, at the above-mentioned defective of prior art, provides a kind of polycarbonate thin wall of extrusion moulding that can solve because the post-processing approach of the polycarbonate thin wall of the extrusion moulding of internal stress effect cracking.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of post-processing approach of polycarbonate thin wall of extrusion moulding, may further comprise the steps:
S1 is heated to 100～140 ℃ with the polycarbonate thin wall of extrusion moulding;
S2 is incubated 1～6 hour down for 100～140 ℃ in described heating-up temperature;
S3 naturally cools to room temperature.In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, described method further comprises: before described step S1, to the preliminary treatment of annealing of the polycarbonate thin wall of described extrusion moulding.
In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, described method further comprises, the polycarbonate thin wall of the described extrusion moulding that step S3 is obtained is implemented solution and soaked checking procedure.
In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, described solution soaks checking procedure and further comprises:
S41 randomly draws polycarbonate thin wall in the polycarbonate thin wall that obtains from step S3;
S42 is dipped into 5～10min in the carbon tetrachloride solution with the described polycarbonate thin wall of randomly drawing.
In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, among the described step S1, described heating-up temperature is 120 ℃.
In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, among the described step S2, be incubated 4 hours.In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, the wall thickness range of described polycarbonate thin wall is 1mm～5mm, and length range is 800mm～1500mm.
In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, among the described step S1, heating process adopts air circulation oven evenly to heat.In the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, among the described step S2, insulation is to carry out in air circulation oven
Implement the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, can eliminate because the very big defective of the inner internal stress of the polycarbonate thin wall that causes of extrusion moulding method, thereby can prevent effectively that polycarbonate thin wall from answering internal stress excessive and ftracture.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the method flow diagram of first embodiment of post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention;
Fig. 2 is the method flow diagram of second embodiment of post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.
In this article, polycarbonate thin wall is meant that wall thickness is about Merlon wall body 1mm～5mm, that make by the method for extrusion moulding.This wall body can be any shape, such as square, cylindrical shape or other rule or irregular shape.Described wall body also can surround an opening or closed space.In a preferred embodiment of the invention, described polycarbonate thin wall can be the lamp tube of lighting.
Fig. 1 is the method flow diagram of first embodiment of post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention.As shown in Figure 1, in step S1, the polycarbonate thin wall of extrusion moulding is heated to 100～140 ℃.For example, in a preferred embodiment of the invention, preferred 120 ℃.In a preferred embodiment of the invention, can adopt air circulation oven, constant temperature roaster or other heaters as known in the art heat.Heating-up temperature is preferably based on the thickness and the length setting of described polycarbonate thin wall.Such as, when the thickness of polycarbonate thin wall big more, when length is long more, this heating-up temperature can be provided with ground higher, as 140 ℃.When the thickness of polycarbonate thin wall more little, length more in short-term, this heating-up temperature can be provided with lower, as 100 ℃.In other embodiments of the invention, also can rule of thumb directly set a comparatively suitable heating-up temperature, as 120 ℃.
In step S2, be incubated 1～6 hour down for 100～140 ℃ in described heating-up temperature.For example, in a preferred embodiment of the invention, preferred 4 hours.In a preferred embodiment of the invention, described temperature retention time is preferably based on the thickness and the length setting of described polycarbonate thin wall.Such as, when the thickness of polycarbonate thin wall big more, when length is long more, temperature retention time can be provided with longer, as 6 hours.When the thickness of polycarbonate thin wall more little, length more in short-term, temperature retention time can be provided with shorter, as 1 hour.In other embodiments of the invention, also can rule of thumb directly set a comparatively suitable temperature retention time, as 4 hours.
In step S3, described polycarbonate thin wall is naturally cooled to room temperature get final product.
Implement the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, can eliminate because the very big defective of the inner internal stress of the polycarbonate thin wall that causes of extrusion moulding method, thereby can prevent effectively that polycarbonate thin wall from answering internal stress excessive and ftracture.
Fig. 2 is the method flow diagram of second embodiment of post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention.As shown in Figure 2, in step S21,, eliminate attached to the burr on the thin-walled or other attachments at first to the preliminary treatment of annealing of the polycarbonate thin wall of extrusion moulding.
In step S22, adopt heater, as constant temperature roaster etc., this polycarbonate thin wall evenly is heated to 100～140 ℃.For example, in a preferred embodiment of the invention, preferred 120 ℃.It should be noted that guarantee that the heater internal temperature is even, so that evenly heat this polycarbonate thin wall.Heating-up temperature is preferably based on the thickness and the length setting of described polycarbonate thin wall.In other embodiments of the invention, also can rule of thumb directly set a comparatively suitable heating-up temperature.
In step S23, this polycarbonate thin wall under described 100～140 ℃, is incubated 1～6 hour.For example, in a preferred embodiment of the invention, preferred 4 hours.In a preferred embodiment of the invention, temperature retention time is preferably based on the thickness and the length setting of described polycarbonate thin wall.In other embodiments of the invention, also can rule of thumb directly set a comparatively suitable temperature retention time time.In one embodiment of the invention, this polycarbonate thin wall that is heated to this heating-up temperature can be taken out from heater, put into specific attemperator again.When the circulation of attemperator inner air is even inadequately, can be according to actual conditions proper extension temperature retention time.In a preferred embodiment of the invention, can adopt constant temperature roaster or air circulation oven with heating and heat insulation function.
In step S24, described polycarbonate thin wall is naturally cooled to room temperature get final product.In this step, this polycarbonate thin wall can be taken out from attemperator, cooling naturally also can be closed this attemperator in air, allows it directly cool off in attemperator.
In step S25, the carbon tetrachloride configuration concentration that can adopt the pure level of analysis is 99% test solution.By this polycarbonate thin wall that cools off is naturally immersed certain depth in this test solution, and keep a period of time, observe the variation of polycarbonate thin wall.If find that polycarbonate thin wall does not change, illustrate that then this last handling process is qualified, otherwise illustrate that then this last handling process is defective.
For the post-processing approach of polycarbonate thin wall that extrusion moulding of the present invention is described better, adopt embodiment further to describe in detail below.In the following embodiments, method of the present invention is used for handling the polycarbonate transparent lamp tube (hereinafter to be referred as the clear lamp tube) of extrusion moulding.
Embodiment 1:
In the present embodiment, the length of clear lamp tube is about 1490mm, and walled thickness is about 5mm.Air circulation oven is used to finish heating and is incubated two steps.At first, to the preliminary treatment of annealing of clear lamp tube, to eliminate attached to the burr on the lamp tube thin-walled or other attachments.Then the temperature with air circulation oven is set at 120 ℃, and the clear lamp tube is put into air circulation oven, closes the air circulation oven insulated door.Then, described air circulation oven begins heating, makes the clear lamp tube be warming up to 120 ℃ of setting with air circulation oven.Described then air circulation oven enters the insulation program, is incubated and closes air circulation oven after 4 hours.Appoint the temperature inside the box of air circulation oven to naturally cool to the insulated door of opening air circulation oven after the room temperature, take out the clear lamp tube, finish processing.Randomly draw several in the clear lamp tube after processing and check its internal stress situation.It is dark just clear lamp tube one end immersion carbon tetrachloride to be analyzed the about 10mm of pure solution, and observation lamp tube situation of change if no change proves that then this annealing process is qualified behind 5～10min, otherwise can judge that then this time processing is defective.Can find that through practice examining using after method of the present invention carries out above-mentioned processing, length is about 1490mm, walled thickness is about the immersion that 5mm clear lamp tube just can anti-6min.
Embodiment 2:
In the present embodiment, the length of clear lamp tube is about 1190mm, and walled thickness is about 3mm.Constant temperature roaster is used to finish heating and is incubated two steps.At first, to the preliminary treatment of annealing of clear lamp tube, to eliminate attached to the burr on the lamp tube thin-walled or other attachments.Then the temperature with constant temperature roaster is set at 110 ℃, and the clear lamp tube is put into constant temperature roaster, closes the constant temperature roaster insulated door.Then, described constant temperature roaster begins heating, makes the clear lamp tube be warming up to 110 ℃ of setting with constant temperature roaster.Described then constant temperature roaster enters the insulation program, is incubated and closes constant temperature roaster after 2 hours.Appoint the temperature inside the box of constant temperature roaster to naturally cool to the insulated door of opening constant temperature roaster after the room temperature, take out the clear lamp tube, finish processing.Randomly draw several in the clear lamp tube after processing and check its internal stress situation.It is dark just clear lamp tube one end immersion carbon tetrachloride to be analyzed the about 8mm of pure solution, and observation lamp tube situation of change if no change proves that then this annealing process is qualified behind 5～10min, otherwise can judge that then this time processing is defective.Can find that through practice examining using after method of the present invention carries out above-mentioned processing, length is about 1190mm, walled thickness is about the immersion that 3mm clear lamp tube just can anti-8min.
Embodiment 3:
In the present embodiment, the length of clear lamp tube is about 890mm, and walled thickness is about 1mm.Air circulation oven is used to finish heating and is incubated two steps.At first, to the preliminary treatment of annealing of clear lamp tube, to eliminate attached to the burr on the lamp tube thin-walled or other attachments.Then the temperature with air circulation oven is set at 100 ℃, and the clear lamp tube is put into air circulation oven, closes the air circulation oven insulated door.Then, described air circulation oven begins heating, makes the clear lamp tube be warming up to 100 ℃ of setting with air circulation oven.Described then air circulation oven enters the insulation program, is incubated and closes air circulation oven after 1 hour.Appoint the temperature inside the box of air circulation oven to naturally cool to the insulated door of opening air circulation oven after the room temperature, take out the clear lamp tube, finish processing.Randomly draw several in the clear lamp tube after processing and check its internal stress situation.It is dark just clear lamp tube one end immersion carbon tetrachloride to be analyzed the about 15mm of pure solution, and observation lamp tube situation of change if no change proves that then this annealing process is qualified behind 5～10min, otherwise can judge that then this time processing is defective.Can find that through practice examining using after method of the present invention carries out above-mentioned processing, length is about 890mm, walled thickness is about the immersion that 1mm clear lamp tube just can anti-10min.
Implement the post-processing approach of the polycarbonate thin wall of extrusion moulding of the present invention, by the clear lamp tube is put into the heating-up temperature that air circulation oven is heated to setting, and under this temperature, stop certain hour, slow then cool to room temperature, eliminate most of internal stress in the lamp tube forming process with this, thereby satisfy of the instructions for use of explosion-proof places such as boats and ships, industrial and mineral, can avoid substantially saving great amount of cost owing to the ftracture replacing of the light fixture that causes of clear lamp tube internal stress effect to light fixture.
Embodiment 1:
In the present embodiment, the length of clear lamp tube is about 1500mm, and walled thickness is about 5mm.Air circulation oven is used to finish heating and is incubated two steps.At first, to the preliminary treatment of annealing of clear lamp tube, to eliminate attached to the burr on the lamp tube thin-walled or other attachments.Then the temperature with air circulation oven is set at 140 ℃, and the clear lamp tube is put into air circulation oven, closes the air circulation oven insulated door.Then, described air circulation oven begins heating, makes the clear lamp tube be warming up to 140 ℃ of setting with air circulation oven.Described then air circulation oven enters the insulation program, is incubated and closes air circulation oven after 6 hours.Appoint the temperature inside the box of air circulation oven to naturally cool to the insulated door of opening air circulation oven after the room temperature, take out the clear lamp tube, finish processing.Randomly draw several in the clear lamp tube after processing and check its internal stress situation.It is dark just clear lamp tube one end immersion carbon tetrachloride to be analyzed the about 10mm of pure solution, and observation lamp tube situation of change if no change proves that then this annealing process is qualified behind 5～10min, otherwise can judge that then this time processing is defective.Can find that through practice examining using after method of the present invention carries out above-mentioned processing, length is about 1500mm, walled thickness is about the immersion that 5mm clear lamp tube just can anti-10min.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the scope of the invention, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion or the material of the technology of the present invention, can carry out many modifications and not break away from its protection domain the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection domain.
Claims (9)
1. the post-processing approach of the polycarbonate thin wall of an extrusion moulding is characterized in that, may further comprise the steps:
S1 is heated to 100～140 ℃ with the polycarbonate thin wall of extrusion moulding;
S2 is incubated 1～6 hour down for 100～140 ℃ in described heating-up temperature;
S3 naturally cools to room temperature.
2. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, described method further comprises: before described step S1, to the preliminary treatment of annealing of the polycarbonate thin wall of described extrusion moulding.
3. the polycarbonate thin wall of extrusion moulding according to claim 1 and 2 is characterized in that, described method further comprises, the polycarbonate thin wall of the described extrusion moulding that step S3 is obtained is implemented solution and soaked checking procedure.
4. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 3 is characterized in that, described solution soaks checking procedure and further comprises:
S41 randomly draws polycarbonate thin wall in the polycarbonate thin wall that obtains from step S3;
S42 is dipped into 5～10min in the carbon tetrachloride solution with the described polycarbonate thin wall of randomly drawing.
5. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, among the described step S1, described heating-up temperature is 120 ℃.
6. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, among the described step S2, is incubated 4 hours.
7. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, the wall thickness range of described polycarbonate thin wall is 1mm～5mm, and length range is 800mm～1500mm.
8. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, among the described step S1, heating process adopts air circulation oven evenly to heat.
9. the post-processing approach of the polycarbonate thin wall of extrusion moulding according to claim 1 is characterized in that, among the described step S2, insulation is to carry out in air circulation oven.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010143933.8A CN101885240B (en) | 2010-04-02 | 2010-04-02 | Posttreatment method for extrusion-molded polycarbonate thin wall |
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| CN201010143933.8A CN101885240B (en) | 2010-04-02 | 2010-04-02 | Posttreatment method for extrusion-molded polycarbonate thin wall |
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| CN101885240A true CN101885240A (en) | 2010-11-17 |
| CN101885240B CN101885240B (en) | 2014-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532570A (en) * | 2010-12-08 | 2012-07-04 | 比亚迪股份有限公司 | Stress relieving method of polycarbonate material |
| CN104369397A (en) * | 2014-10-08 | 2015-02-25 | 余姚市富达电子有限公司 | PC plastic heat treatment method |
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| CN1114663A (en) * | 1995-06-02 | 1996-01-10 | 武汉顺天泰集团股份有限公司 | Method for producing composite high molecular material filter core of engine oil filter |
| CN1192450A (en) * | 1997-03-01 | 1998-09-09 | 广州兴杭塑胶制品有限公司 | Method for mfg. flame-retardant and energy-saving plastic thermal-insulation cover for pipeline |
| CN1445073A (en) * | 2002-03-14 | 2003-10-01 | 四川大学 | Extruding forming method for inner lining type metal-plastic composite tube |
| CN101225183A (en) * | 2008-01-29 | 2008-07-23 | 福州大学 | Method for preparing polycarbonate anti-static optical ball cover |
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2010
- 2010-04-02 CN CN201010143933.8A patent/CN101885240B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114663A (en) * | 1995-06-02 | 1996-01-10 | 武汉顺天泰集团股份有限公司 | Method for producing composite high molecular material filter core of engine oil filter |
| CN1192450A (en) * | 1997-03-01 | 1998-09-09 | 广州兴杭塑胶制品有限公司 | Method for mfg. flame-retardant and energy-saving plastic thermal-insulation cover for pipeline |
| CN1445073A (en) * | 2002-03-14 | 2003-10-01 | 四川大学 | Extruding forming method for inner lining type metal-plastic composite tube |
| CN101225183A (en) * | 2008-01-29 | 2008-07-23 | 福州大学 | Method for preparing polycarbonate anti-static optical ball cover |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532570A (en) * | 2010-12-08 | 2012-07-04 | 比亚迪股份有限公司 | Stress relieving method of polycarbonate material |
| CN102532570B (en) * | 2010-12-08 | 2015-02-04 | 比亚迪股份有限公司 | Stress relieving method of polycarbonate material |
| CN104369397A (en) * | 2014-10-08 | 2015-02-25 | 余姚市富达电子有限公司 | PC plastic heat treatment method |
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| CN101885240B (en) | 2014-06-11 |
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