阅读说明：本技术 一种新型聚四氟乙烯薄膜烧结装置及方法 (Novel polytetrafluoroethylene film sintering device and method ) 是由 张惠伦 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种新型聚四氟乙烯薄膜烧结装置及方法,包括烧结管、一对压辊、一对第一支架和一对第二支架,一对第一支架相对设置,烧结管两端分别设有管状结构的连接部,连接部通过轴承座转动连接在一对第一支架上,烧结管内具有容置腔,容置腔内设置有加热棒和温度探针,烧结管的其中一连接部穿过其对应连接的轴承座并设置有连接齿轮,连接齿轮的一侧设置有驱动电机,所述驱动电机的转轴末端连接有与连接齿轮啮合的驱动齿轮,由驱动电机驱动烧结管旋转；在此基础上,本方案还提供了负压泵在装置中的应用,以此实现对烧结管的温度控制,能够对聚四氟乙烯薄膜烧结处理时,将烧结温度稳定控制在较优的区间内,提高烧结处理的可靠性。(The invention discloses a novel polytetrafluoroethylene film sintering device and a novel polytetrafluoroethylene film sintering method, wherein the novel polytetrafluoroethylene film sintering device comprises a sintering pipe, a pair of compression rollers, a pair of first supports and a pair of second supports, the pair of first supports are oppositely arranged, connecting parts of tubular structures are respectively arranged at two ends of the sintering pipe, the connecting parts are rotatably connected onto the pair of first supports through bearing seats, a containing cavity is formed in the sintering pipe, a heating rod and a temperature probe are arranged in the containing cavity, one connecting part of the sintering pipe penetrates through the corresponding connected bearing seat and is provided with a connecting gear, one side of the connecting gear is provided with a driving motor, the tail end of a rotating shaft of the driving motor is connected with a driving gear meshed with the connecting gear, and the driving motor drives; on the basis, the scheme also provides the application of the negative pressure pump in the device, so that the temperature control of the sintering pipe is realized, the sintering temperature can be stably controlled in a better interval during the sintering treatment of the polytetrafluoroethylene film, and the reliability of the sintering treatment is improved.)

1. A novel polytetrafluoroethylene film sintering device comprises a sintering pipe, a pair of compression rollers, a pair of first supports and a pair of second supports, wherein the first supports are arranged oppositely, connecting parts of tubular structures are arranged at the two ends of the sintering pipe respectively, the connecting parts are connected to the first supports in a rotating mode through bearing seats, a containing cavity is formed in the sintering pipe, a heating rod and a temperature probe are arranged in the containing cavity, the two ends of the heating rod are arranged in the containing cavity in a penetrating mode through mounting frames, one end, close to the end of the sintering pipe, of each mounting frame is a tubular part, is coaxial with the sintering pipe and penetrates out of the sintering pipe, the tubular part is also connected with the inner wall of the connecting part of the sintering pipe in a rotating mode through an oilless bearing, the heating rod is connected with a lead, the lead is led out of the tubular part of one of the mounting frame and is used for being connected with an external power supply, the pair of compression rollers is hung through a pair of second support respectively and is installed in sintering pipe top both sides, and wherein, the polytetrafluoroethylene film of unsintered processing is walked around by one of them compression roller lower limb, again through sintering pipe upper limb heating sintering processing after, winds out from another compression roller lower limb, its characterized in that: the number of the heating rods is three, the heating rods are distributed in the sintering pipe in a triangular array mode, and two ends of each heating rod are fixedly connected with the corresponding mounting frame; the connecting part of the sintering pipe, which is far away from the lead leading-out end, penetrates through the bearing seat correspondingly connected with the sintering pipe and is provided with a connecting gear, one side of the connecting gear is provided with a driving motor, the tail end of a rotating shaft of the driving motor is connected with a driving gear meshed with the connecting gear, and the sintering pipe is driven to rotate by the driving motor.

2. The novel polytetrafluoroethylene film sintering device according to claim 1, wherein: the three temperature probes are correspondingly arranged on one side, close to the inner wall of the sintering pipe, of the gap between every two of the three heating rods.

3. The novel polytetrafluoroethylene film sintering device according to claim 2, wherein: the power of the heating rod is 3 Kw.

4. The novel polytetrafluoroethylene film sintering device according to claim 3, wherein: the sintering pipe is a stainless steel round pipe with the outer diameter of 80mm and the wall thickness of 10 mm.

5. A novel polytetrafluoroethylene film sintering device with a negative pressure pump is applied, and is characterized in that: the novel polytetrafluoroethylene film sintering device comprises the novel polytetrafluoroethylene film sintering device as claimed in claim 4, wherein a connecting part of the sintering pipe, which is far away from a lead leading-out end of the lead, is further connected with a negative pressure pump through a metal connecting pipeline, a gas condenser is further arranged on the metal connecting pipeline, and a tubular part of the sintering pipe, which leads out the lead, is further provided with an air hole and communicates an accommodating cavity of the sintering pipe with the outside.

6. The new polytetrafluoroethylene film sintering device with negative pressure pump applied according to claim 5, characterized in that: it still includes and is connected and be used for opening and close the controller of wire intercommunication with the wire, one side of sintering pipe still is equipped with and is used for sensing sintering outer wall temperature detection unit, temperature detection unit be infrared temperature detector, temperature probe, negative pressure pump and driving motor all be connected with the controller electricity, and by controller control negative pressure pump and driving motor work.

7. A novel polytetrafluoroethylene film sintering method is characterized by comprising the following steps: it includes the new polytetrafluoroethylene film sintering device with negative pressure pump of claim 6, the sintering method includes:

acquiring working state parameters of the heating rod in real time;

acquiring the temperature of the outer wall of the sintering pipe and the feedback temperature of a temperature probe in the sintering pipe in real time, and constructing a temperature change curve of the outer wall of the sintering pipe and a feedback temperature change curve of the temperature probe;

calculating to obtain a temperature difference according to a temperature change curve of the outer wall of the sintering pipe and a feedback temperature change curve of the temperature probe, and constructing a real-time temperature difference curve;

constructing a temperature trend line in a preset period according to the temperature change curve of the outer wall of the sintering pipe and predicting a future time node t through the temperature trend line₁Obtaining a predicted temperature value T of the outer wall of the sintered tube₁；

When the current temperature of the outer wall of the sintering pipe is greater than the preset threshold value of the working temperature or the predicted temperature value of the outer wall of the sintering pipe and the current time node t₀When the temperature difference meets the preset condition, the negative pressure pump is started to suck air in the accommodating cavity of the sintering pipe until the current working temperature of the outer wall of the sintering pipe or the predicted temperature value of the outer wall of the sintering pipe is lower than the preset working temperature threshold value.

8. The novel polytetrafluoroethylene film sintering method according to claim 7, wherein: current time node t₀And future time node t₁The time difference Δ t is 5-10 s.

9. The novel polytetrafluoroethylene film sintering method according to claim 7, wherein: the preset threshold value of the working temperature is the upper limit allowable temperature T when the sintering pipe performs sintering treatment on the polytetrafluoroethylene film₂。

10. The novel polytetrafluoroethylene film sintering method according to claim 9, wherein: when the predicted temperature value is greater than the upper limit allowable temperature T in the sintering treatment₂And current time node t₀When the temperature difference is larger than a preset temperature difference threshold value delta T, a negative pressure pump is started to suck air in the accommodating cavity of the sintering pipe.

Technical Field

The invention relates to the technical field of polytetrafluoroethylene film processing, in particular to a novel polytetrafluoroethylene film sintering device and a novel polytetrafluoroethylene film sintering method.

Background

The sintering of the polytetrafluoroethylene film is one of necessary links for performance improvement and post-treatment, the traditional technical scheme is that the environment temperature is heated through a heating rod, then the polytetrafluoroethylene film is subjected to heat transfer for sintering treatment, and the heat transfer effect of an air medium is poor, so the mode is very power-consuming, although some technical schemes for performing contact type heating sintering on the polytetrafluoroethylene film through a heating roller and a pressing roller exist at present, due to strong temperature sensitivity and interaction of the polytetrafluoroethylene film, once the temperature of the heating roller fluctuates greatly, the polytetrafluoroethylene film is easy to generate obvious sintering excessive traces, even products can be scrapped, and production loss is brought.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a novel polytetrafluoroethylene film sintering device and a novel polytetrafluoroethylene film sintering method which are practical, convenient, flexible and reliable, can save energy consumption and are convenient to control temperature.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a novel polytetrafluoroethylene film sintering device comprises a sintering pipe, a pair of compression rollers, a pair of first supports and a pair of second supports, wherein the first supports are arranged oppositely, connecting parts of tubular structures are arranged at the two ends of the sintering pipe respectively, the connecting parts are connected to the first supports in a rotating mode through bearing seats, a containing cavity is formed in the sintering pipe, a heating rod and a temperature probe are arranged in the containing cavity, the two ends of the heating rod are arranged in the containing cavity in a penetrating mode through mounting frames, one end, close to the end of the sintering pipe, of each mounting frame is a tubular part, is coaxial with the sintering pipe and penetrates out of the sintering pipe, the tubular part is also connected with the inner wall of the connecting part of the sintering pipe in a rotating mode through an oilless bearing, the heating rod is connected with a lead, the lead is led out of the tubular part of one of the mounting frame and is used for being connected with an external power supply, the pair of compression rollers is hung through a pair of second support respectively and is installed in sintering pipe top both sides, and wherein, the polytetrafluoroethylene film of unsintered processing is walked around by one of them compression roller lower limb, again through sintering pipe upper limb heating sintering processing after, winds out from another compression roller lower limb, its characterized in that: the number of the heating rods is three, the heating rods are distributed in the sintering pipe in a triangular array mode, and two ends of each heating rod are fixedly connected with the corresponding mounting frame; the connecting part of the sintering pipe, which is far away from the lead leading-out end, penetrates through the bearing seat correspondingly connected with the sintering pipe and is provided with a connecting gear, one side of the connecting gear is provided with a driving motor, the tail end of a rotating shaft of the driving motor is connected with a driving gear meshed with the connecting gear, and the sintering pipe is driven to rotate by the driving motor.

As a possible implementation manner, further, the temperature probes are three and respectively arranged on one side of the gap between every two of the three heating rods, which is close to the inner wall of the sintering pipe.

As a preferred implementation option, the power of the heating rod is preferably 3 Kw.

As a better implementation choice, preferably, the sintering pipe is a stainless steel round pipe with the outer diameter of 80mm and the wall thickness of 10 mm.

Based on the device scheme, the invention also provides a novel polytetrafluoroethylene film sintering device with the negative pressure pump, which comprises the novel polytetrafluoroethylene film sintering device, wherein the connecting part of the sintering pipe, which is far away from the lead leading-out end of the lead, is also connected with the negative pressure pump through a metal connecting pipeline, a gas condenser is also arranged on the metal connecting pipeline, and the tubular part of the sintering pipe, which leads out the lead, is also provided with an air hole and communicates the accommodating cavity of the sintering pipe with the outside.

As a preferred implementation option, preferably, the sintering device further comprises a controller connected with the lead and used for opening and closing the lead, a temperature detection unit used for sensing the temperature of the outer wall of the sintering pipe is further arranged on one side of the sintering pipe, the temperature detection unit is an infrared temperature detector, the temperature probe, the negative pressure pump and the driving motor are all electrically connected with the controller, and the controller controls the negative pressure pump and the driving motor to work.

Based on the novel polytetrafluoroethylene film sintering device with the negative pressure pump, the invention also provides a novel polytetrafluoroethylene film sintering method, which comprises the novel polytetrafluoroethylene film sintering device with the negative pressure pump, and the sintering method comprises the following steps:

acquiring working state parameters of the heating rod in real time;

acquiring the temperature of the outer wall of the sintering pipe and the feedback temperature of a temperature probe in the sintering pipe in real time, and constructing a temperature change curve of the outer wall of the sintering pipe and a feedback temperature change curve of the temperature probe;

calculating to obtain a temperature difference according to a temperature change curve of the outer wall of the sintering pipe and a feedback temperature change curve of the temperature probe, and constructing a real-time temperature difference curve;

constructing a temperature trend line in a preset period according to the temperature change curve of the outer wall of the sintering pipe and predicting a future time node t through the temperature trend line₁Obtaining a predicted temperature value T of the outer wall of the sintered tube₁；

When the current temperature of the outer wall of the sintering pipe is greater than the preset threshold value of the working temperature or the predicted temperature value of the outer wall of the sintering pipe and the current time node t₀When the temperature difference meets the preset condition, the negative pressure pump is started to suck air in the accommodating cavity of the sintering pipe until the current working temperature of the outer wall of the sintering pipe or the predicted temperature value of the outer wall of the sintering pipe is lower than the preset working temperature threshold value.

As a preferred implementation choice, the time difference Δ t between the current time node t0 and the future time node t1 is preferably 5 to 10 s.

As a preferred implementation choice, it is preferable that the preset working temperature threshold is an upper allowable temperature T of the sintering pipe for sintering the teflon film₂。

As a preferable implementation option, it is preferable that the predicted temperature value is larger than the upper allowable temperature T in the sintering process₂And current time node t₀When the temperature difference is larger than a preset temperature difference threshold value delta T, a negative pressure pump is started to suck air in the accommodating cavity of the sintering pipe.

By adopting the technical scheme, the invention has the beneficial effects that: this scheme heats the sintering pipe through setting up three heating rods through this scheme, can improve heating efficiency on the one hand, and simultaneously, sintering pipe itself is a confined tubular structure relatively, and it can improve the heat transfer efficiency of heating rod and avoid the heat to scatter and disappear excessively, manages through sintering to sinteringThe polytetrafluoroethylene film is subjected to direct contact sintering treatment, not only is the sintering degree effect good, but also the sintering degree can be improved to 95%, and most of the conventional air heating sintering modes can only be improved to about 80%, in addition, the heat transfer efficiency of the sintering pipe is high, the energy is saved, compared with the conventional air sintering mode, a large amount of electric power can be saved, and the sintering device is more convenient to operate and higher in stability; because the heating rod indirectly conducts heat to the sintering pipe through the air medium in the sintering pipe, if the outer wall of the sintering pipe exceeds the upper limit allowable temperature T, the heating rod can not directly conduct heat to the sintering pipe, and the temperature of the sintering pipe is not lower than the upper limit allowable temperature T₂In this case, the temperature does not immediately decrease in a short time, but rather continues to increase in a short time and then decreases, and since the polytetrafluoroethylene film itself has a very thin structure, once the temperature of the sintered tube exceeds the upper limit allowable temperature T₂Then probably very long section polytetrafluoroethylene film just appears sintering the condition that does not reach standard, and this scheme is based on this condition, directly take away the hot-air medium in with the sintering pipe through the negative pressure pump, and the air medium temperature that newly gets into is lower relatively, can play the cooling on one hand, the temperature of heating rod is absorbed to the another side, thereby avoid the temperature of sintering pipe to continue to rise, can play the effect that the pole setting sees the shadow, when the negative pressure pump intervenes, the outer wall temperature of sintering pipe falls immediately, make the temperature control of sintering pipe more sensitive, quick.

Drawings

The invention will be further elucidated with reference to the drawings and the detailed description:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention in an application;

FIG. 2 is a schematic structural view of embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a control connection according to embodiment 2 of the present invention;

FIG. 5 is a graph showing the temperature change curve of the sintered tube, the feedback temperature change curve of the temperature detection, and the change curve of the temperature difference when the apparatus of embodiment 2 of the present invention is operated.

Detailed Description

Example 1

As shown in fig. 1 or fig. 2, the novel polytetrafluoroethylene film sintering device of the invention comprises a sintering pipe 1, a pair of press rollers 2, a pair of first supports 3 and a pair of second supports 4, wherein the pair of first supports 3 are oppositely arranged, two ends of the sintering pipe 1 are respectively provided with a connecting part 11 with a tubular structure, the connecting parts 11 are rotatably connected to the pair of first supports 3 through a bearing seat 5, a containing cavity 12 is arranged in the sintering pipe 1, a heating rod 13 and a temperature probe 14 are arranged in the containing cavity 12, two ends of the heating rod 13 are both penetrated in the containing cavity 12 through a mounting frame 15, one end of the mounting frame 15 close to the end of the sintering pipe 1 is a tubular part 151 which is coaxial with the sintering pipe 1 and penetrates out of the sintering pipe 1, the tubular part 151 is also rotatably connected with the inner wall of the connecting part 11 of the sintering pipe 1 through an oilless bearing 16, the heating rod 13 is connected with a lead 131, the lead 131 is led out from the tubular part, the temperature probe 14 is connected with the mounting frame 15, the temperature detection end of the temperature probe extends into a gap between the heating rod 13 and the inner wall of the sintering pipe 1, the pair of pressure rollers 2 are respectively suspended and mounted on two sides above the sintering pipe 1 through the pair of second supports 4, wherein the unsintered polytetrafluoroethylene film 6 is wound by the lower edge of one of the pressure rollers, and is wound out from the lower edge of the other pressure roller after being heated and sintered by the upper edge of the sintering pipe 1, in the embodiment, the number of the heating rods 13 is three, the heating rods are arranged in the sintering pipe 1 in a triangular array, and two ends of each heating rod 13 are fixedly connected with the corresponding mounting frame 15; the sintering pipe 1 far away from the connecting part 11 of the leading-out end of the lead wire 131 penetrates through the bearing seat 5 correspondingly connected with the sintering pipe and is provided with a connecting gear 111, one side of the connecting gear 111 is provided with a driving motor 7, the tail end of a rotating shaft 71 of the driving motor 7 is connected with a driving gear 72 meshed with the connecting gear 111, and the sintering pipe 1 is driven to rotate by the driving motor 7.

As a possible implementation manner, in order to accurately detect the temperature in the sintering pipe 1, the temperature probes 14 are three and are respectively disposed on one side of the three heating rods 13, where the gap between every two heating rods is close to the inner wall of the sintering pipe 1.

In addition, as a preferred implementation choice, it is preferable that the power of the heating rod 13 is 3Kw, and the total power of the three heating rods 13 is approximately 9 Kw; as a preferred implementation option, the sintered tube 1 is preferably a stainless steel round tube with an outer diameter of 80mm and a wall thickness of 10mm, and the sintered tube 1 of this specification is compact, can reduce unnecessary heat loss, and is also convenient to install.

Example 2

As shown in fig. 3 or fig. 4, the present embodiment is substantially the same as embodiment 1, and the difference is that, based on the solution of embodiment 1, the present embodiment further provides to apply a negative pressure pump in the novel polytetrafluoroethylene film sintering device, the present embodiment not only includes the novel polytetrafluoroethylene film sintering device described in embodiment 1, but also includes the negative pressure pump 8, the connecting portion 11 of the sintering pipe 1 away from the lead leading end is further connected with the negative pressure pump 8 through a metal connecting pipeline 81, the metal connecting pipeline 81 is further provided with a gas condenser 9, the tubular portion 151 of the sintering pipe 1 leading out of the lead 131 is further provided with an air hole 1511, and the accommodating cavity 12 of the sintering pipe 1 is communicated with the outside.

Wherein, as a preferred implementation option, preferably, this embodiment still includes and is connected with wire 131 and is used for opening and close the controller that wire 131 communicates, one side of sintering pipe 1 still is equipped with and is used for sensing sintering pipe outer wall temperature detecting unit 17, temperature detecting unit 17 be infrared temperature detector, temperature probe 14, negative pressure pump 8 and driving motor 7 all be connected with the controller electricity, and by the work of controller control negative pressure pump 8 and driving motor 7.

The parts corresponding to the reference numerals not mentioned in this embodiment are the same as those in embodiment 1, and are not described again.

Based on the above-mentioned novel polytetrafluoroethylene film sintering device that has negative pressure pump 8 to apply, this embodiment still provides a novel polytetrafluoroethylene film sintering method, and it includes the above-mentioned novel polytetrafluoroethylene film sintering device that has negative pressure pump to apply, the sintering method include:

s01, acquiring working state parameters of the heating rod 13 in real time;

s02, acquiring the temperature of the outer wall of the sintering pipe 1 and the feedback temperature (average temperature) of the temperature probe 14 in the sintering pipe 1 in real time, and constructing a temperature change curve of the outer wall of the sintering pipe 1 and a feedback temperature change curve of the temperature probe 14, which are shown in a reference figure 5;

s03, calculating to obtain a temperature difference according to the temperature change curve of the outer wall of the sintering pipe 1 and the feedback temperature change curve of the temperature probe 14, and constructing a real-time temperature difference curve;

s04, constructing a temperature trend line in a preset period according to the temperature change curve of the outer wall of the sintered tube 1 and predicting a future time node t through the temperature trend line₁Obtaining a predicted temperature value T of the outer wall of the sintered tube 1₁；

S05, when the current temperature of the outer wall of the sintering pipe 1 is larger than the preset threshold value of the working temperature or the predicted temperature value of the outer wall of the sintering pipe 1 and the current time node t₀When the temperature difference meets the preset condition, the negative pressure pump 8 is started to pump air in the accommodating cavity 12 of the sintering pipe 1 until the current working temperature of the outer wall of the sintering pipe 1 or the predicted temperature value of the outer wall of the sintering pipe is lower than the preset working temperature threshold value.

As a preferred implementation choice, the time difference Δ t between the current time node t0 and the future time node t1 is preferably 5 to 10 s.

In addition, as a preferred implementation choice, it is preferable that the preset working temperature threshold is an upper-limit allowable temperature T when the sintering pipe performs the sintering treatment on the polytetrafluoroethylene film₂(ii) a As a preferable implementation option, it is preferable that the predicted temperature value is larger than the upper allowable temperature T in the sintering process₂And current time node t₀When the temperature difference is larger than a preset temperature difference threshold value delta T, a negative pressure pump is started to suck air in the accommodating cavity of the sintering pipe.

Wherein T can be learned from a simulation example shown in fig. 5₂And T₀Respectively, a preferred upper limit allowable temperature T of the sintered tube 1₂And a lower allowable temperature T₀When the heating rod 13 is electrified to generate heat, the heating rod 13 generates heat and simultaneously transfers the air medium in the accommodating cavity 12 of the sintering pipe 1Heat is conducted to the inner wall of the sintering pipe 1 through an air medium, so that the temperature fed back by the temperature probe 14 tends to rise, the temperature difference of one small section of the sintering pipe and the other small section of the sintering pipe is enlarged and then gradually reduced until a stable smaller temperature difference value is reached, and the scheme needs to be understood that the sintering pipe 1 is heated through three heating rods 13, on one hand, the heating efficiency can be improved, meanwhile, the sintering pipe 1 is of a relatively closed cylindrical structure, the heat transfer efficiency of the heating rods 13 can be improved, excessive heat dissipation can be avoided, and as the heating rods 13 conduct heat indirectly through the air medium, when the outer wall of the sintering pipe 1 exceeds the upper limit allowable temperature T₂In this case, the temperature does not immediately decrease in a short time, but rather continues to increase in a short time and then decreases, and since the polytetrafluoroethylene film itself has a very thin structure, once the temperature of the sintered tube 1 exceeds the upper limit allowable temperature T₂Then, it is very likely that the situation that the sintering of a long section of polytetrafluoroethylene film is not up to standard occurs, but the technical purpose of the scheme is based on the situation, the hot air medium in the sintering pipe 1 is directly pumped away, the temperature of the newly-entered air medium is relatively low, one side of the air medium can be cooled, and the other side absorbs the temperature of the heating rod, so that the temperature of the sintering pipe 1 is prevented from continuously rising, the effect that the vertical rod sees a shadow can be achieved, and it can be known by combining with fig. 5 that when the negative pressure pump 8 is introduced, the temperature of the outer wall of the sintering pipe 1 is immediately reduced in a small scale, and it can be seen that the scheme of the embodiment can more sensitively and rapidly control and adjust the temperature of.

Although a specific embodiment of the present invention has been described above, it will be understood by those skilled in the art that this is by way of illustration only, and that various changes or modifications may be made to this embodiment by those skilled in the art without departing from the principle and spirit of the invention, and these changes and modifications all fall within the scope of the invention.